id float64 706 1.8k | title stringlengths 1 343 | abstract stringlengths 6 6.09k | categories stringlengths 5 125 | processed_abstract stringlengths 2 5.96k | tokenized_abstract stringlengths 8 8.74k | centroid stringlengths 2.1k 2.17k |
|---|---|---|---|---|---|---|
1,802.0276 | Tuning Streamed Applications on Intel Xeon Phi: A Machine Learning Based
Approach | Many-core accelerators, as represented by the XeonPhi coprocessors and
GPGPUs, allow software to exploit spatial and temporal sharing of computing
resources to improve the overall system performance. To unlock this performance
potential requires software to effectively partition the hardware resource to
maximize the overlap between hostdevice communication and accelerator
computation, and to match the granularity of task parallelism to the resource
partition. However, determining the right resource partition and task
parallelism on a per program, per dataset basis is challenging. This is because
the number of possible solutions is huge, and the benefit of choosing the right
solution may be large, but mistakes can seriously hurt the performance. In this
paper, we present an automatic approach to determine the hardware resource
partition and the task granularity for any given application, targeting the
Intel XeonPhi architecture. Instead of hand-crafting the heuristic for which
the process will have to repeat for each hardware generation, we employ machine
learning techniques to automatically learn it. We achieve this by first
learning a predictive model offline using training programs; we then use the
learned model to predict the resource partition and task granularity for any
unseen programs at runtime. We apply our approach to 23 representative parallel
applications and evaluate it on a CPU-XeonPhi mixed heterogenous many-core
platform. Our approach achieves, on average, a 1.6x (upto 5.6x) speedup, which
translates to 94.5% of the performance delivered by a theoretically perfect
predictor.
| cs.PF | manycore accelerators as represented by the xeonphi coprocessors and gpgpus allow software to exploit spatial and temporal sharing of computing resources to improve the overall system performance to unlock this performance potential requires software to effectively partition the hardware resource to maximize the overlap between hostdevice communication and accelerator computation and to match the granularity of task parallelism to the resource partition however determining the right resource partition and task parallelism on a per program per dataset basis is challenging this is because the number of possible solutions is huge and the benefit of choosing the right solution may be large but mistakes can seriously hurt the performance in this paper we present an automatic approach to determine the hardware resource partition and the task granularity for any given application targeting the intel xeonphi architecture instead of handcrafting the heuristic for which the process will have to repeat for each hardware generation we employ machine learning techniques to automatically learn it we achieve this by first learning a predictive model offline using training programs we then use the learned model to predict the resource partition and task granularity for any unseen programs at runtime we apply our approach to 23 representative parallel applications and evaluate it on a cpuxeonphi mixed heterogenous manycore platform our approach achieves on average a 16x upto 56x speedup which translates to 945 of the performance delivered by a theoretically perfect predictor | [['manycore', 'accelerators', 'as', 'represented', 'by', 'the', 'xeonphi', 'coprocessors', 'and', 'gpgpus', 'allow', 'software', 'to', 'exploit', 'spatial', 'and', 'temporal', 'sharing', 'of', 'computing', 'resources', 'to', 'improve', 'the', 'overall', 'system', 'performance', 'to', 'unlock', 'this', 'performance', 'potential', 'requires', 'software', 'to', 'effectively', 'partition', 'the', 'hardware', 'resource', 'to', 'maximize', 'the', 'overlap', 'between', 'hostdevice', 'communication', 'and', 'accelerator', 'computation', 'and', 'to', 'match', 'the', 'granularity', 'of', 'task', 'parallelism', 'to', 'the', 'resource', 'partition', 'however', 'determining', 'the', 'right', 'resource', 'partition', 'and', 'task', 'parallelism', 'on', 'a', 'per', 'program', 'per', 'dataset', 'basis', 'is', 'challenging', 'this', 'is', 'because', 'the', 'number', 'of', 'possible', 'solutions', 'is', 'huge', 'and', 'the', 'benefit', 'of', 'choosing', 'the', 'right', 'solution', 'may', 'be', 'large', 'but', 'mistakes', 'can', 'seriously', 'hurt', 'the', 'performance', 'in', 'this', 'paper', 'we', 'present', 'an', 'automatic', 'approach', 'to', 'determine', 'the', 'hardware', 'resource', 'partition', 'and', 'the', 'task', 'granularity', 'for', 'any', 'given', 'application', 'targeting', 'the', 'intel', 'xeonphi', 'architecture', 'instead', 'of', 'handcrafting', 'the', 'heuristic', 'for', 'which', 'the', 'process', 'will', 'have', 'to', 'repeat', 'for', 'each', 'hardware', 'generation', 'we', 'employ', 'machine', 'learning', 'techniques', 'to', 'automatically', 'learn', 'it', 'we', 'achieve', 'this', 'by', 'first', 'learning', 'a', 'predictive', 'model', 'offline', 'using', 'training', 'programs', 'we', 'then', 'use', 'the', 'learned', 'model', 'to', 'predict', 'the', 'resource', 'partition', 'and', 'task', 'granularity', 'for', 'any', 'unseen', 'programs', 'at', 'runtime', 'we', 'apply', 'our', 'approach', 'to', '23', 'representative', 'parallel', 'applications', 'and', 'evaluate', 'it', 'on', 'a', 'cpuxeonphi', 'mixed', 'heterogenous', 'manycore', 'platform', 'our', 'approach', 'achieves', 'on', 'average', 'a', '16x', 'upto', '56x', 'speedup', 'which', 'translates', 'to', '945', 'of', 'the', 'performance', 'delivered', 'by', 'a', 'theoretically', 'perfect', 'predictor']] | [-0.10203931627011038, -0.014768968015831087, -0.06392337765811314, 0.03819721758157582, -0.1193746113552688, -0.18596270307898521, 0.08948835802740122, 0.41940950092702356, -0.2772967045913793, -0.40974150956847155, 0.08719313815894038, -0.22297658604713014, -0.10213216320555817, 0.18794433898730284, -0.11697170400231356, 0.0981838414477857, 0.12332528107959723, 0.043393387160717674, -0.05061270499728326, -0.3223922628387968, 0.2519808289491468, 0.10842483167528597, 0.3321769614624353, 0.053903345214640803, 0.10934882427955794, -0.02953277084017252, 0.007496149671208273, -0.04442235208554273, -0.04646928268723572, 0.17437002513235292, 0.3091737607555687, 0.24299520916956213, 0.3380606090570362, -0.417698689422005, -0.13163428022585905, 0.09868988079520372, 0.1416827748513693, 0.063330791822961, -0.010342724246677393, -0.25518124976641154, 0.11082506536816557, -0.208169840897123, -0.029216255059338406, -0.1430498454411331, -0.032287462575671576, -0.02597616704600728, -0.28804861376077956, -0.02809600478125752, 0.005647499160045105, 0.028158041233650576, -0.016253635632550806, -0.09921294130257065, 0.03698528091707784, 0.17345112678594887, -0.009420668660652123, 0.06703260756479815, 0.14589080598546614, -0.15982656913849155, -0.1674379965939169, 0.39509923630354243, -0.00042447339868746127, -0.23085484340484452, 0.1833843479060337, -0.0367765839666359, -0.16494077185773823, 0.0829500246546271, 0.2542103554154985, 0.06940094903748259, -0.15570838097681922, 0.040312507489057355, 0.02274807234111632, 0.2281327704067191, 0.06178726787026176, 0.036287506652247704, 0.18215525365319166, 0.2595112087825934, 0.055979635146581844, 0.17454281733938468, -0.06327537329928178, -0.06611932496043742, -0.21923272108905908, -0.17973896134806747, -0.20448409254925373, -0.004007456942433322, -0.08066011937159764, -0.1370652306884747, 0.3886534038181894, 0.23279600897351177, 0.12976588374182868, 0.13972501978019458, 0.3729500485281659, 0.06338837393808266, 0.14830021147265968, 0.13777507158318678, 0.13993205533325115, -0.025665554027202435, 0.1513844634782877, -0.23874456625835747, 0.05690015848968815, 0.020095511339604855] |
1,802.02761 | Thermoelectric properties of polycrystalline palladium sulfide | A suite measurements of the electrical, thermal, and vibrational properties
are conducted on palladium sulfide (PdS) in order to investigate its
thermoelectric performance. The tetragonal structure with the space group
$P$42/$m$ for PdS is determined from X-ray diffraction measurement. The unique
temperature dependence of mobility suggests that acoustic phonons and ion
impurity scattering are two dominant scattering mechanisms within the compound.
The obtained power factor of $27$ $\mu$Wcm$^{-1}$K$^{-2}$ at 800 K is the
largest value in the remaining transition-metal sulfides studied so far. The
maximum value of the dimensionless figure of merit is 0.33 at 800 K. The
observed phonon softening with temperature indicates that the reduction of the
lattice thermal conductivity is mainly controlled by the enhanced lattice
anharmonicity. These results indicate that the binary bulk PdS has promising
potential to have good thermoelectrical performance.
| cond-mat.mtrl-sci | a suite measurements of the electrical thermal and vibrational properties are conducted on palladium sulfide pds in order to investigate its thermoelectric performance the tetragonal structure with the space group p42m for pds is determined from xray diffraction measurement the unique temperature dependence of mobility suggests that acoustic phonons and ion impurity scattering are two dominant scattering mechanisms within the compound the obtained power factor of 27 muwcm1k2 at 800 k is the largest value in the remaining transitionmetal sulfides studied so far the maximum value of the dimensionless figure of merit is 033 at 800 k the observed phonon softening with temperature indicates that the reduction of the lattice thermal conductivity is mainly controlled by the enhanced lattice anharmonicity these results indicate that the binary bulk pds has promising potential to have good thermoelectrical performance | [['a', 'suite', 'measurements', 'of', 'the', 'electrical', 'thermal', 'and', 'vibrational', 'properties', 'are', 'conducted', 'on', 'palladium', 'sulfide', 'pds', 'in', 'order', 'to', 'investigate', 'its', 'thermoelectric', 'performance', 'the', 'tetragonal', 'structure', 'with', 'the', 'space', 'group', 'p42m', 'for', 'pds', 'is', 'determined', 'from', 'xray', 'diffraction', 'measurement', 'the', 'unique', 'temperature', 'dependence', 'of', 'mobility', 'suggests', 'that', 'acoustic', 'phonons', 'and', 'ion', 'impurity', 'scattering', 'are', 'two', 'dominant', 'scattering', 'mechanisms', 'within', 'the', 'compound', 'the', 'obtained', 'power', 'factor', 'of', '27', 'muwcm1k2', 'at', '800', 'k', 'is', 'the', 'largest', 'value', 'in', 'the', 'remaining', 'transitionmetal', 'sulfides', 'studied', 'so', 'far', 'the', 'maximum', 'value', 'of', 'the', 'dimensionless', 'figure', 'of', 'merit', 'is', '033', 'at', '800', 'k', 'the', 'observed', 'phonon', 'softening', 'with', 'temperature', 'indicates', 'that', 'the', 'reduction', 'of', 'the', 'lattice', 'thermal', 'conductivity', 'is', 'mainly', 'controlled', 'by', 'the', 'enhanced', 'lattice', 'anharmonicity', 'these', 'results', 'indicate', 'that', 'the', 'binary', 'bulk', 'pds', 'has', 'promising', 'potential', 'to', 'have', 'good', 'thermoelectrical', 'performance']] | [-0.12762126789462788, 0.16902275288098112, -0.040594310955040985, -0.042088943939328334, -0.053327037325059924, -0.09587822085315431, 0.09046028884282957, 0.41515737451888896, -0.2771605297785114, -0.300839793437195, 0.037265158325209526, -0.3915753740058453, -0.06515295008990776, 0.21016651821081286, 0.06960984534515, 0.046808610710906105, 0.0054266766610520855, 0.011071311141778197, -0.05920019602161591, -0.21408666104457721, 0.24513818086297423, 0.12310033823122028, 0.3209820367344138, 0.09646619393455762, 0.04479241750582501, -0.032472419959527474, 0.06861453483019161, 0.03326840121708638, -0.1626407790527554, 0.06029657055451362, 0.260688919092839, -0.07072010280702401, 0.18511661710734997, -0.3456061178542398, -0.23218057977932471, 0.005970792196415089, 0.10296723498635132, 0.05327425616689854, -0.05323259188465912, -0.18483964380187293, 0.09275542807385877, -0.12516033761548223, -0.1149549485831004, -0.07102253637449057, 0.003560370850135331, -0.02586153831884817, -0.2211285296849113, 0.11734185679815709, -0.005281438906159666, 0.106313745615383, -0.09477437918712557, -0.21681012648666553, -0.07444584561442888, 0.04344814637399934, 0.05459542010945302, 0.010919574391165818, 0.20546719575714734, -0.09258703838913115, -0.07024743842581908, 0.41899712478948964, -0.08050034389167127, -0.023994497593311178, 0.1380846047135829, -0.1997999734279734, -0.08138995087809033, 0.21687805184887515, 0.10119338955178304, 0.07014303730059139, -0.16475547660116313, 0.03902078181832891, -0.01646487030752555, 0.2036148980015477, 0.0744941397242386, 0.10045565457807647, 0.21484708251707532, 0.19906501023323034, -0.01882658920733741, 0.143467362049247, -0.13567893804154463, -0.0021178049112980566, -0.19336169013339613, -0.1200359636572776, -0.21169906474856867, 0.08351022916742497, -0.14814363556926965, -0.12378254481763751, 0.37120729237794875, 0.12751493168072084, 0.17084094488786328, -0.04565982208587229, 0.228312390314898, 0.13275914746164172, 0.0890922990800054, 0.06039291980020978, 0.3177207428893005, 0.1615368307861327, 0.09256447825787796, -0.3534716187786587, 0.08033460123567945, -0.013331214128131116] |
1,802.02762 | Electronic and optical properties of La-doped Sr$_3$Ir$_2$O$_7$
epitaxial thin-films | We have investigated structural, transport, and optical properties of tensile
strained (Sr$_{1-x}$La$_x$)$_3$Ir$_2$O$_7$ (x = 0, 0.025, 0.05) epitaxial
thin-films. While High-T$_c$ superconductivity is predicted theoretically in
the system, we have observed that all of the samples remain insulating with
finite optical gap energies and Mott variable-range hopping characteristics in
transport. Cross-sectional scanning transmission electron microscopy indicates
that structural defects such as stacking faults appear in this system. The
insulating behavior of the La-doped Sr$_3$Ir$_2$O$_7$ thin-films is presumably
due to disorder-induced localization and ineffective electron-doping of La,
which brings to light the intriguing difference between epitaxial thin films
and bulk single crystals of the iridates.
| cond-mat.str-el cond-mat.mtrl-sci cond-mat.supr-con | we have investigated structural transport and optical properties of tensile strained sr_1xla_x_3ir_2o_7 x 0 0025 005 epitaxial thinfilms while hight_c superconductivity is predicted theoretically in the system we have observed that all of the samples remain insulating with finite optical gap energies and mott variablerange hopping characteristics in transport crosssectional scanning transmission electron microscopy indicates that structural defects such as stacking faults appear in this system the insulating behavior of the ladoped sr_3ir_2o_7 thinfilms is presumably due to disorderinduced localization and ineffective electrondoping of la which brings to light the intriguing difference between epitaxial thin films and bulk single crystals of the iridates | [['we', 'have', 'investigated', 'structural', 'transport', 'and', 'optical', 'properties', 'of', 'tensile', 'strained', 'sr_1xla_x_3ir_2o_7', 'x', '0', '0025', '005', 'epitaxial', 'thinfilms', 'while', 'hight_c', 'superconductivity', 'is', 'predicted', 'theoretically', 'in', 'the', 'system', 'we', 'have', 'observed', 'that', 'all', 'of', 'the', 'samples', 'remain', 'insulating', 'with', 'finite', 'optical', 'gap', 'energies', 'and', 'mott', 'variablerange', 'hopping', 'characteristics', 'in', 'transport', 'crosssectional', 'scanning', 'transmission', 'electron', 'microscopy', 'indicates', 'that', 'structural', 'defects', 'such', 'as', 'stacking', 'faults', 'appear', 'in', 'this', 'system', 'the', 'insulating', 'behavior', 'of', 'the', 'ladoped', 'sr_3ir_2o_7', 'thinfilms', 'is', 'presumably', 'due', 'to', 'disorderinduced', 'localization', 'and', 'ineffective', 'electrondoping', 'of', 'la', 'which', 'brings', 'to', 'light', 'the', 'intriguing', 'difference', 'between', 'epitaxial', 'thin', 'films', 'and', 'bulk', 'single', 'crystals', 'of', 'the', 'iridates']] | [-0.20284575464891144, 0.21942278350933989, -0.03104340090886554, 0.0032384103148253365, 0.01602613782618665, -0.1921165880331209, 0.12230285959605362, 0.46278066303834176, -0.3139911787810473, -0.2788282217069651, -0.007724132586623207, -0.37825136253773006, -0.1408584080014866, 0.16019048896229382, 0.004874189198921317, 0.06456465152933182, -0.08103234943870491, -0.18451489864857595, -0.13445687435513126, -0.22488286500927784, 0.23019907831720718, 0.007330143250054815, 0.3802187688901876, 0.09792562795676363, -0.0015414803587261914, 0.01088420752869937, 0.2060754742446238, 0.02239733996905061, -0.2186144554623893, 0.047984179579517214, 0.3091209183980539, -0.20245988556699265, 0.16587958501389666, -0.45739977434277534, -0.24767009470864987, -0.045239057486822595, 0.15474553811318667, 0.11249762722765756, -0.11015993420902676, -0.26785807772675185, 0.0903102043672528, -0.09903366065717492, -0.06169486645319797, -0.0870325897811252, -0.029572416860971926, -0.010194282317014176, -0.1807129640947096, 0.15724681375674832, 0.0377498496576999, 0.13385353654225185, -0.1436188728141698, -0.11101560623981782, -0.1349248657030171, 0.040057218678801965, 0.09582096177438111, 0.03967368776584496, 0.19472596652860058, -0.08607747636111543, -0.07764315325766802, 0.35893421542369625, 0.019035593520632936, 0.0006444564211598792, 0.17881042521121432, -0.22482784348992108, -0.05376814734371542, 0.1989005356981844, 0.06584397983710163, 0.08118232637779443, -0.13923519210284124, 0.08269289945867093, 0.0007550970027313649, 0.22470950268466677, 0.0649657198227942, 0.15567163137483944, 0.23765569444275597, 0.24614194458694133, -0.008081316645031126, 0.11565090569405301, -0.15661231131695247, 0.0479450071981014, -0.1370512504058266, -0.20374509276035557, -0.2023647756381322, 0.10597952114400065, -0.08070871985723146, -0.2550622552443404, 0.3415738691810916, 0.16293156902911593, 0.16763934100191424, -0.11391511509416498, 0.1807896262260823, 0.05478527415679424, 0.05537068195080439, -0.029690963713434135, 0.2698269178638759, 0.1481544745959414, 0.13345407284087007, -0.2899248881798997, 0.15214884995191258, -0.02212563563065911] |
1,802.02763 | KVN observations suggest multiple $\gamma$-ray emission regions in 3C 84 | 3C 84 (NGC 1275) is a well-studied mis-aligned Active Galactic Nucleus (AGN),
which has been active in Gamma rays since at least 2008. We have monitored the
source at four wavelengths (14 mm, 7 mm, 3 mm and 2 mm) using the Korean VLBI
network (KVN) since 2013 as part of the interferometric monitoring of
$\gamma$-ray bright AGN (iMOGABA) program. 3C 84 exhibits bright radio emission
both near the central supermassive black hole (SMBH) feature known as C1 and
from a moving feature located to the south known as C3. Other facilities have
also detected these short-term variations above a slowly rising trend at
shorter wavelengths, such as in Gamma ray and 1 mm total intensity
light-curves. We find that the variations in the $\gamma$ rays and 1 mm total
intensity light-curves are correlated, with the $\gamma$ rays leading and
lagging the radio emission. Analysis of the 2 mm KVN data shows that both the
Gamma rays and 1 mm total intensity short-term variations are better correlated
with the SMBH region than C3, likely placing the short-term variations in C1.
We interpret the emission as being due to the random alignment of spatially
separated emission regions. We place the slowly rising trend in C3, consistent
with previous results. Additionally, we report that since mid-2015, a large
mm-wave radio flare has been occurring in C3, with a large Gamma ray flare
coincident with the onset of this flare at all radio wavelengths.
| astro-ph.HE | 3c 84 ngc 1275 is a wellstudied misaligned active galactic nucleus agn which has been active in gamma rays since at least 2008 we have monitored the source at four wavelengths 14 mm 7 mm 3 mm and 2 mm using the korean vlbi network kvn since 2013 as part of the interferometric monitoring of gammaray bright agn imogaba program 3c 84 exhibits bright radio emission both near the central supermassive black hole smbh feature known as c1 and from a moving feature located to the south known as c3 other facilities have also detected these shortterm variations above a slowly rising trend at shorter wavelengths such as in gamma ray and 1 mm total intensity lightcurves we find that the variations in the gamma rays and 1 mm total intensity lightcurves are correlated with the gamma rays leading and lagging the radio emission analysis of the 2 mm kvn data shows that both the gamma rays and 1 mm total intensity shortterm variations are better correlated with the smbh region than c3 likely placing the shortterm variations in c1 we interpret the emission as being due to the random alignment of spatially separated emission regions we place the slowly rising trend in c3 consistent with previous results additionally we report that since mid2015 a large mmwave radio flare has been occurring in c3 with a large gamma ray flare coincident with the onset of this flare at all radio wavelengths | [['3c', '84', 'ngc', '1275', 'is', 'a', 'wellstudied', 'misaligned', 'active', 'galactic', 'nucleus', 'agn', 'which', 'has', 'been', 'active', 'in', 'gamma', 'rays', 'since', 'at', 'least', '2008', 'we', 'have', 'monitored', 'the', 'source', 'at', 'four', 'wavelengths', '14', 'mm', '7', 'mm', '3', 'mm', 'and', '2', 'mm', 'using', 'the', 'korean', 'vlbi', 'network', 'kvn', 'since', '2013', 'as', 'part', 'of', 'the', 'interferometric', 'monitoring', 'of', 'gammaray', 'bright', 'agn', 'imogaba', 'program', '3c', '84', 'exhibits', 'bright', 'radio', 'emission', 'both', 'near', 'the', 'central', 'supermassive', 'black', 'hole', 'smbh', 'feature', 'known', 'as', 'c1', 'and', 'from', 'a', 'moving', 'feature', 'located', 'to', 'the', 'south', 'known', 'as', 'c3', 'other', 'facilities', 'have', 'also', 'detected', 'these', 'shortterm', 'variations', 'above', 'a', 'slowly', 'rising', 'trend', 'at', 'shorter', 'wavelengths', 'such', 'as', 'in', 'gamma', 'ray', 'and', '1', 'mm', 'total', 'intensity', 'lightcurves', 'we', 'find', 'that', 'the', 'variations', 'in', 'the', 'gamma', 'rays', 'and', '1', 'mm', 'total', 'intensity', 'lightcurves', 'are', 'correlated', 'with', 'the', 'gamma', 'rays', 'leading', 'and', 'lagging', 'the', 'radio', 'emission', 'analysis', 'of', 'the', '2', 'mm', 'kvn', 'data', 'shows', 'that', 'both', 'the', 'gamma', 'rays', 'and', '1', 'mm', 'total', 'intensity', 'shortterm', 'variations', 'are', 'better', 'correlated', 'with', 'the', 'smbh', 'region', 'than', 'c3', 'likely', 'placing', 'the', 'shortterm', 'variations', 'in', 'c1', 'we', 'interpret', 'the', 'emission', 'as', 'being', 'due', 'to', 'the', 'random', 'alignment', 'of', 'spatially', 'separated', 'emission', 'regions', 'we', 'place', 'the', 'slowly', 'rising', 'trend', 'in', 'c3', 'consistent', 'with', 'previous', 'results', 'additionally', 'we', 'report', 'that', 'since', 'mid2015', 'a', 'large', 'mmwave', 'radio', 'flare', 'has', 'been', 'occurring', 'in', 'c3', 'with', 'a', 'large', 'gamma', 'ray', 'flare', 'coincident', 'with', 'the', 'onset', 'of', 'this', 'flare', 'at', 'all', 'radio', 'wavelengths']] | [-0.070269761305627, 0.1424500424611958, -0.010022446003073972, 0.08780068396667938, -0.06044739496186994, -0.13577444200245548, 0.01478334689835044, 0.5063948598980161, -0.1745608363327613, -0.3482471558099218, 0.11075974619054696, -0.32010521592680535, -0.04183038756158589, 0.19300607920728655, -0.009138839695282876, -0.027413609256017258, 0.0366995451815863, -0.09410144953652289, -0.018030461764419102, -0.1584463173521613, 0.19744896719954846, 0.14925307357834489, 0.18986966409353362, -0.004125300436868783, 0.07176849532087963, -0.09277179213704471, -0.08948198844281632, -0.045813407645081614, -0.048875954888510584, 0.05659857104992285, 0.26556515185011714, 0.09720884295976508, 0.19368218298985998, -0.35230885297291875, -0.26400656610557277, 0.08079713390061934, 0.15433351270621642, -0.04633283094431494, -0.008158473508201609, -0.2831742591379187, 0.06504870510826281, -0.15209428934164004, -0.18083546417320912, 0.14752379474442653, 0.11217432318417611, 0.047341786426901664, -0.1765874084065904, 0.10119413424568749, 0.012606980902707026, 0.08594098866480515, -0.10910050703707264, -0.10235527089576689, -0.03411853912815884, 0.09470155422626009, 0.08365768493158951, 0.16297123713237213, 0.16686161386652915, -0.07167225694998759, -0.11246673794486463, 0.34425007882991737, -0.05636735107486196, 0.03172113104139868, 0.21227986554333098, -0.24960174955257614, -0.2380836632207067, 0.2531354228455836, 0.1609242436402628, 0.10148859570161305, -0.10602484007474205, 0.0009987067660177705, -0.01312685985489134, 0.2360665012113325, 0.09388775825094725, 0.05748873914078002, 0.28467890605160434, 0.11865769299877521, 0.056830674940739526, 0.14491921595198246, -0.3371993959378992, -0.004748659492451002, -0.2830615137912395, -0.034899118758305224, -0.12591936395946055, 0.11046867941349699, -0.11461562729361892, -0.09159761315203925, 0.37227568482106776, 0.02594270915589083, 0.1983063333934459, 0.0446602691170717, 0.2603370483145427, 0.04365121580214004, 0.08101868218644735, 0.18718133645887677, 0.36166276311293183, 0.1049749735767926, 0.15299127728840592, -0.1777394955433882, 0.025184837766996433, -0.03427897182706728] |
1,802.02764 | Light propagation in 2PN approximation in the field of one moving
monopole: I. Initial value problem | In this investigation the light propagation in the gravitational field of one
arbitrarily moving body with monopole structure is considered in the second
post-Newtonian approximation. It is found that the light trajectory depends on
the acceleration of the body. Some of these acceleration terms are important in
order to get well-defined logarithmic functions with dimensionless arguments,
while all the other acceleration terms are negligible on the pico-second level
of accuracy in time-delay measurements. The expressions of the observables
total light deflection and time delay are determined.
| gr-qc | in this investigation the light propagation in the gravitational field of one arbitrarily moving body with monopole structure is considered in the second postnewtonian approximation it is found that the light trajectory depends on the acceleration of the body some of these acceleration terms are important in order to get welldefined logarithmic functions with dimensionless arguments while all the other acceleration terms are negligible on the picosecond level of accuracy in timedelay measurements the expressions of the observables total light deflection and time delay are determined | [['in', 'this', 'investigation', 'the', 'light', 'propagation', 'in', 'the', 'gravitational', 'field', 'of', 'one', 'arbitrarily', 'moving', 'body', 'with', 'monopole', 'structure', 'is', 'considered', 'in', 'the', 'second', 'postnewtonian', 'approximation', 'it', 'is', 'found', 'that', 'the', 'light', 'trajectory', 'depends', 'on', 'the', 'acceleration', 'of', 'the', 'body', 'some', 'of', 'these', 'acceleration', 'terms', 'are', 'important', 'in', 'order', 'to', 'get', 'welldefined', 'logarithmic', 'functions', 'with', 'dimensionless', 'arguments', 'while', 'all', 'the', 'other', 'acceleration', 'terms', 'are', 'negligible', 'on', 'the', 'picosecond', 'level', 'of', 'accuracy', 'in', 'timedelay', 'measurements', 'the', 'expressions', 'of', 'the', 'observables', 'total', 'light', 'deflection', 'and', 'time', 'delay', 'are', 'determined']] | [-0.18699301993149484, 0.15181529658391726, -0.06992998527536212, 0.04739062481175372, -0.043431728812974205, -0.09189622845977198, -0.024664071075845683, 0.3484772528565034, -0.22924333516248438, -0.32497476955312626, 0.05685991770723228, -0.28719983937565324, -0.10196811268322689, 0.23144823180641547, -0.011026117149984117, 0.06065781497894678, 0.035719717739063295, 0.09762181271257442, -0.06495046081443773, -0.24392432916292184, 0.291776635196753, 0.06881000394499752, 0.21355272212260684, 0.051386384612902306, 0.10215559907170922, -0.002650604583323002, -0.036506327621768725, 0.018415299295664354, -0.1019678700754729, 0.10613607459290084, 0.16256750562379874, 0.07005868287388842, 0.228079195526905, -0.40935184129752045, -0.22898511229174992, 0.05577422453761967, 0.12788397828550185, 0.10875189577521713, -0.029101891489158017, -0.26622833456670825, 0.04281528806855339, -0.11380794912923214, -0.15267086777359593, -0.05107603802583938, 0.03994043687017375, 0.09981133658804411, -0.19709116573307425, 0.09158833162469227, 0.02544099473676016, 0.00028082596268071684, -0.07072593146315126, -0.06722831731488885, 0.011750080633561972, 0.12758715437768503, 0.13632456624209013, 0.07084621230937638, 0.1427653679017757, -0.13197979020620804, -0.07389065061241042, 0.4410619463576654, -0.08062463138810207, -0.2252281767293827, 0.1253260506038164, -0.25039189316563815, -0.07844431848308547, 0.14693822007393464, 0.19170412142912663, 0.1360506075109507, -0.13953874851536374, 0.07771669668186088, 0.0388247134532173, 0.16425454111899748, 0.11011718945079592, 0.07480176309188612, 0.19155629022523415, 0.12974142268040154, 0.042362373127320475, 0.07145559339483572, -0.09709380534585825, -0.1154043416135273, -0.36190104315620525, -0.10987164056318444, -0.15021405308263722, 0.019498316895996414, -0.15276887768667685, -0.14543639504632286, 0.40062513749310097, 0.12064477999499718, 0.1796550785711165, 0.03767216304076164, 0.34869694418468794, 0.17520225323130226, 0.04569709404956463, 0.07280851220926961, 0.3672058548643606, 0.10438112844713032, 0.0644849237449857, -0.2533490518815301, 0.08946977168061705, 0.06875199021847356] |
1,802.02765 | A local parallel communication algorithm for polydisperse rigid body
dynamics | The simulation of large ensembles of particles is usually parallelized by
partitioning the domain spatially and using message passing to communicate
between the processes handling neighboring subdomains. The particles are
represented as individual geometric objects and are associated to the
subdomains. Handling collisions and migrating particles between subdomains, as
required for proper parallel execution, requires a complex communication
protocol. Typically, the parallelization is restricted to handling only
particles that are smaller than a subdomain. In many applications, however,
particle sizes may vary drastically with some of them being larger than a
subdomain. In this article we propose a new communication and synchronization
algorithm that can handle the parallelization without size restrictions on the
particles. Despite the additional complexity and extended functionality, the
new algorithm introduces only minimal overhead. We demonstrate the scalability
of the previous and the new communication algorithms up to almost two million
parallel processes and for handling ten billion (1e10) geometrically resolved
particles on a state-of-the-art petascale supercomputer. Different scenarios
are presented to analyze the performance of the new algorithm and to
demonstrate its capability to simulate polydisperse scenarios, where large
individual particles can extend across several subdomains.
| cs.DC cs.PF physics.comp-ph | the simulation of large ensembles of particles is usually parallelized by partitioning the domain spatially and using message passing to communicate between the processes handling neighboring subdomains the particles are represented as individual geometric objects and are associated to the subdomains handling collisions and migrating particles between subdomains as required for proper parallel execution requires a complex communication protocol typically the parallelization is restricted to handling only particles that are smaller than a subdomain in many applications however particle sizes may vary drastically with some of them being larger than a subdomain in this article we propose a new communication and synchronization algorithm that can handle the parallelization without size restrictions on the particles despite the additional complexity and extended functionality the new algorithm introduces only minimal overhead we demonstrate the scalability of the previous and the new communication algorithms up to almost two million parallel processes and for handling ten billion 1e10 geometrically resolved particles on a stateoftheart petascale supercomputer different scenarios are presented to analyze the performance of the new algorithm and to demonstrate its capability to simulate polydisperse scenarios where large individual particles can extend across several subdomains | [['the', 'simulation', 'of', 'large', 'ensembles', 'of', 'particles', 'is', 'usually', 'parallelized', 'by', 'partitioning', 'the', 'domain', 'spatially', 'and', 'using', 'message', 'passing', 'to', 'communicate', 'between', 'the', 'processes', 'handling', 'neighboring', 'subdomains', 'the', 'particles', 'are', 'represented', 'as', 'individual', 'geometric', 'objects', 'and', 'are', 'associated', 'to', 'the', 'subdomains', 'handling', 'collisions', 'and', 'migrating', 'particles', 'between', 'subdomains', 'as', 'required', 'for', 'proper', 'parallel', 'execution', 'requires', 'a', 'complex', 'communication', 'protocol', 'typically', 'the', 'parallelization', 'is', 'restricted', 'to', 'handling', 'only', 'particles', 'that', 'are', 'smaller', 'than', 'a', 'subdomain', 'in', 'many', 'applications', 'however', 'particle', 'sizes', 'may', 'vary', 'drastically', 'with', 'some', 'of', 'them', 'being', 'larger', 'than', 'a', 'subdomain', 'in', 'this', 'article', 'we', 'propose', 'a', 'new', 'communication', 'and', 'synchronization', 'algorithm', 'that', 'can', 'handle', 'the', 'parallelization', 'without', 'size', 'restrictions', 'on', 'the', 'particles', 'despite', 'the', 'additional', 'complexity', 'and', 'extended', 'functionality', 'the', 'new', 'algorithm', 'introduces', 'only', 'minimal', 'overhead', 'we', 'demonstrate', 'the', 'scalability', 'of', 'the', 'previous', 'and', 'the', 'new', 'communication', 'algorithms', 'up', 'to', 'almost', 'two', 'million', 'parallel', 'processes', 'and', 'for', 'handling', 'ten', 'billion', '1e10', 'geometrically', 'resolved', 'particles', 'on', 'a', 'stateoftheart', 'petascale', 'supercomputer', 'different', 'scenarios', 'are', 'presented', 'to', 'analyze', 'the', 'performance', 'of', 'the', 'new', 'algorithm', 'and', 'to', 'demonstrate', 'its', 'capability', 'to', 'simulate', 'polydisperse', 'scenarios', 'where', 'large', 'individual', 'particles', 'can', 'extend', 'across', 'several', 'subdomains']] | [-0.15167335257987388, 0.1289089660633219, -0.02149089974478004, 0.028998340676994708, -0.07819233998822057, -0.1741750233840802, 0.034468042156741346, 0.40025180765715335, -0.282174606963563, -0.39200279510614133, 0.08122064920778616, -0.2469319529899674, -0.055191130571174606, 0.19402893446111583, -0.07110932780702779, 0.055716762114108996, 0.12491033579459346, -0.019764571021559662, -0.039179782852462215, -0.27071117835377795, 0.2491545768464423, 0.0353347357967137, 0.23388283522385148, 0.037205727911110556, 0.1125669676947032, -0.02533976238523244, -0.05209044566047646, 0.025330152794114113, -0.0655137712934514, 0.13186383798260715, 0.22789720039453884, 0.14489024943618484, 0.2858640812873762, -0.4744279966202043, -0.19546185032993613, 0.11415822488007121, 0.2179588884217616, 0.09579056464330689, -0.021917656078052107, -0.27030707508964336, 0.0960569733275949, -0.13333998659030774, -0.07260388030100087, -0.07520042007108808, -0.006238386901680634, 0.04369293098491543, -0.24914135161241155, 0.026386400635953974, 0.013387007405371918, 0.030328132436459602, 0.002555471556675645, -0.09640357802812186, 0.02760747538791745, 0.12847478813686802, 0.01262925666908085, -0.020876747270173232, 0.1702662470521337, -0.08663897219184707, -0.12983048385428508, 0.4200940358876714, 0.029136984920371763, -0.23869409580368803, 0.290897833569224, -0.07963839018868565, -0.12035200027846463, 0.1541461150737294, 0.2371280230081967, 0.12656784524741285, -0.1661186037994726, 0.0679849091727111, 0.007329248781779206, 0.1790334001385865, 0.09288358621796622, 0.03861422080073337, 0.14830041430550456, 0.19722168558887912, 0.08437914728931839, 0.1472286799836036, -0.07298490990008745, -0.17250297845009696, -0.24570428273830738, -0.18339343787767043, -0.1937452331916746, -0.04820495171299331, -0.15302775391555484, -0.1403234733063825, 0.3605350448715827, 0.17931536215793886, 0.1949589587114166, 0.08735973838406964, 0.3531828288169314, 0.003728713897539605, 0.12661549520400883, 0.14374029055891158, 0.16824297024822715, 0.054219704366371975, 0.11446868721883334, -0.18857034250328328, 0.04925326209305664, -0.0032058602725570113] |
1,802.02766 | Gamma-rays in the radio galaxy 3C 84: A complex situation | 3C 84 is a nearby Active Galactic Nucleus (AGN) that is unique in that is
believed that we are observing near the true jet launching region - unlike
blazars. The source is active in Gamma rays and has been detected with Fermi
since its launch in 2008, including being detected at TeV energies with other
instruments. Due to the relative proximity of the source (z=0.018), it provides
a unique opportunity to pinpoint the location of the $\gamma$-ray emission by
combining the Gamma ray data with very long baseline inteferometry (VLBI) data.
A study using the Korean VLBI network (KVN) showed that the Gamma rays occur in
both downstream jet emission and the region near where the jet is launched.
Further analysis of the kinematics using Wavelet Image Segmentation and
Evaluation (WISE) algorithm, which uses 2-dimensional cross-correlations to
statistically derive the kinematics of high-resolution 7 mm VLBA data show that
the Gamma ray emission is caused by a fast-travelling shock catching a slower
moving shock and then interacting with the external medium, in behaviour
reminiscent of a long duration gamma-ray burst (GRB). This could explain why
such high energy flaring is seen in such low Doppler boosted sources. Finally,
we show some early results from a study of the jet launching region using the
Global mm-VLBI Array (GMVA). The nucleus appears to have a consistent double
nuclear structure that is likely too broad to be the true jet base.
| astro-ph.HE | 3c 84 is a nearby active galactic nucleus agn that is unique in that is believed that we are observing near the true jet launching region unlike blazars the source is active in gamma rays and has been detected with fermi since its launch in 2008 including being detected at tev energies with other instruments due to the relative proximity of the source z0018 it provides a unique opportunity to pinpoint the location of the gammaray emission by combining the gamma ray data with very long baseline inteferometry vlbi data a study using the korean vlbi network kvn showed that the gamma rays occur in both downstream jet emission and the region near where the jet is launched further analysis of the kinematics using wavelet image segmentation and evaluation wise algorithm which uses 2dimensional crosscorrelations to statistically derive the kinematics of highresolution 7 mm vlba data show that the gamma ray emission is caused by a fasttravelling shock catching a slower moving shock and then interacting with the external medium in behaviour reminiscent of a long duration gammaray burst grb this could explain why such high energy flaring is seen in such low doppler boosted sources finally we show some early results from a study of the jet launching region using the global mmvlbi array gmva the nucleus appears to have a consistent double nuclear structure that is likely too broad to be the true jet base | [['3c', '84', 'is', 'a', 'nearby', 'active', 'galactic', 'nucleus', 'agn', 'that', 'is', 'unique', 'in', 'that', 'is', 'believed', 'that', 'we', 'are', 'observing', 'near', 'the', 'true', 'jet', 'launching', 'region', 'unlike', 'blazars', 'the', 'source', 'is', 'active', 'in', 'gamma', 'rays', 'and', 'has', 'been', 'detected', 'with', 'fermi', 'since', 'its', 'launch', 'in', '2008', 'including', 'being', 'detected', 'at', 'tev', 'energies', 'with', 'other', 'instruments', 'due', 'to', 'the', 'relative', 'proximity', 'of', 'the', 'source', 'z0018', 'it', 'provides', 'a', 'unique', 'opportunity', 'to', 'pinpoint', 'the', 'location', 'of', 'the', 'gammaray', 'emission', 'by', 'combining', 'the', 'gamma', 'ray', 'data', 'with', 'very', 'long', 'baseline', 'inteferometry', 'vlbi', 'data', 'a', 'study', 'using', 'the', 'korean', 'vlbi', 'network', 'kvn', 'showed', 'that', 'the', 'gamma', 'rays', 'occur', 'in', 'both', 'downstream', 'jet', 'emission', 'and', 'the', 'region', 'near', 'where', 'the', 'jet', 'is', 'launched', 'further', 'analysis', 'of', 'the', 'kinematics', 'using', 'wavelet', 'image', 'segmentation', 'and', 'evaluation', 'wise', 'algorithm', 'which', 'uses', '2dimensional', 'crosscorrelations', 'to', 'statistically', 'derive', 'the', 'kinematics', 'of', 'highresolution', '7', 'mm', 'vlba', 'data', 'show', 'that', 'the', 'gamma', 'ray', 'emission', 'is', 'caused', 'by', 'a', 'fasttravelling', 'shock', 'catching', 'a', 'slower', 'moving', 'shock', 'and', 'then', 'interacting', 'with', 'the', 'external', 'medium', 'in', 'behaviour', 'reminiscent', 'of', 'a', 'long', 'duration', 'gammaray', 'burst', 'grb', 'this', 'could', 'explain', 'why', 'such', 'high', 'energy', 'flaring', 'is', 'seen', 'in', 'such', 'low', 'doppler', 'boosted', 'sources', 'finally', 'we', 'show', 'some', 'early', 'results', 'from', 'a', 'study', 'of', 'the', 'jet', 'launching', 'region', 'using', 'the', 'global', 'mmvlbi', 'array', 'gmva', 'the', 'nucleus', 'appears', 'to', 'have', 'a', 'consistent', 'double', 'nuclear', 'structure', 'that', 'is', 'likely', 'too', 'broad', 'to', 'be', 'the', 'true', 'jet', 'base']] | [-0.07641833204221218, 0.11384436702950204, -0.09593379804666372, 0.12427733396080898, -0.11465905689079552, -0.12032394329918192, 0.018992900725904892, 0.4655054086977814, -0.21845676803148967, -0.3162569714789378, 0.07946193197276444, -0.29533054844892404, -0.02529310537105862, 0.22087536939974636, 0.008762301488388132, -0.03179849848037269, 0.09205449743424245, -0.045523304381764475, -0.019294235376799678, -0.13865674587234142, 0.252712476358531, 0.18444087374707724, 0.23143854277007817, 0.01978014168494252, 0.10486809023745121, -0.06113646209457929, -0.08880907195605377, -0.004856759825463783, -0.05101804774981537, 0.05353207564962275, 0.26733789057074553, 0.11214634270526151, 0.20519392363865802, -0.35398127451697564, -0.249841012802728, 0.07438690587680073, 0.1512939873468527, 0.00784628626622973, -0.04060162709272922, -0.3126533854559579, 0.07002364060385748, -0.18959790071908464, -0.17668697462476632, 0.049402730858654396, 0.03650316866511043, 0.04152745010722627, -0.20435197262336163, 0.06384498331240042, 0.010943220250780367, 0.047339218222793744, -0.07732373570498238, -0.02274268005994406, -0.013059154543233045, 0.09106068739152336, 0.09213605521524205, 0.1329921149995495, 0.16615704719888721, -0.13315732001644023, -0.10835305906515172, 0.3885037682494743, -0.033787118935551336, -0.03145985646530035, 0.21859699298845645, -0.23624942579326477, -0.19260291677820396, 0.22753292515953172, 0.16812892103012889, 0.08161410735820995, -0.1315483825798939, 0.015783813685064818, -0.051305542600915785, 0.18112163792631808, 0.05686968048103154, 0.028159460607678332, 0.2506258093058429, 0.16527500062229786, 0.04592123247380864, 0.14086849658447814, -0.294019699158355, -0.0038250742757574042, -0.2967523727179604, -0.07285275995097262, -0.1550124562503968, 0.08710669368119078, -0.08161954425889602, -0.08776653866219196, 0.3789604742971665, 0.06284678007297693, 0.20819391294362696, -0.012980698894689533, 0.2837400097974596, 0.03209057970249907, 0.06261701359056887, 0.17976350220653448, 0.3556033835514756, 0.09441457120503517, 0.11423656961662655, -0.2035989506573892, 0.08781098375453594, 0.009186983633627917] |
1,802.02767 | Evolution of defect signatures at ferroelectric domain walls in Mg-doped
LiNbO3 | The domain structure of uniaxial ferroelectric lithium niobate single
crystals is investigated using Raman spectroscopy mapping. The influence of
doping with magnesium and poling at room temperature is studied by analysing
frequency shifts at domain walls and their variations with dopant concentration
and annealing conditions. It is shown that defects are stabilized at domain
walls and that changes in the defect structures with Mg concentration can be
probed by the shift of Raman modes. We show that the signatures of polar
defects in the bulk and at the domain walls differ.
| cond-mat.mtrl-sci | the domain structure of uniaxial ferroelectric lithium niobate single crystals is investigated using raman spectroscopy mapping the influence of doping with magnesium and poling at room temperature is studied by analysing frequency shifts at domain walls and their variations with dopant concentration and annealing conditions it is shown that defects are stabilized at domain walls and that changes in the defect structures with mg concentration can be probed by the shift of raman modes we show that the signatures of polar defects in the bulk and at the domain walls differ | [['the', 'domain', 'structure', 'of', 'uniaxial', 'ferroelectric', 'lithium', 'niobate', 'single', 'crystals', 'is', 'investigated', 'using', 'raman', 'spectroscopy', 'mapping', 'the', 'influence', 'of', 'doping', 'with', 'magnesium', 'and', 'poling', 'at', 'room', 'temperature', 'is', 'studied', 'by', 'analysing', 'frequency', 'shifts', 'at', 'domain', 'walls', 'and', 'their', 'variations', 'with', 'dopant', 'concentration', 'and', 'annealing', 'conditions', 'it', 'is', 'shown', 'that', 'defects', 'are', 'stabilized', 'at', 'domain', 'walls', 'and', 'that', 'changes', 'in', 'the', 'defect', 'structures', 'with', 'mg', 'concentration', 'can', 'be', 'probed', 'by', 'the', 'shift', 'of', 'raman', 'modes', 'we', 'show', 'that', 'the', 'signatures', 'of', 'polar', 'defects', 'in', 'the', 'bulk', 'and', 'at', 'the', 'domain', 'walls', 'differ']] | [-0.1054410715011757, 0.22998634118914277, -0.03319313912396575, -0.0687272172845941, -0.023357919517106245, -0.11976268508850219, 0.06743506865529855, 0.5342037890638623, -0.30286774997200283, -0.2601783989345307, 0.08638026733411946, -0.30347152950835754, -0.07323687541257631, 0.14855701131439145, 0.02404827814917643, -0.03493881134500543, -0.03528085622711332, -0.054106655883715375, -0.08293812210763712, -0.1954335815523966, 0.2784346725873567, 0.016632520816299123, 0.3658662688109901, 0.11005990013255032, 0.02735726284579589, -0.06163267938133616, 0.10459476400289562, 0.06247561140456698, -0.1492418708869961, 0.06577051181679112, 0.2583106010614966, -0.0790416335579581, 0.15505104770136813, -0.43945398871469626, -0.2758158785035158, 0.008198324038268446, 0.1270862946332852, 0.1640172294740166, -0.10950645683128592, -0.29703973491604513, 0.10238251332602985, 1.0554033976334791e-05, -0.11477925599767612, -0.046002537227020815, -0.01372604223561811, 0.011045506735751918, -0.2326404102802901, 0.09607527527835343, 0.0327044571033464, 0.13842647978114886, -0.1298684994485434, -0.09254273408921537, -0.12015682326343197, 0.04819077671925118, 0.036049603180100136, 0.016952544043945906, 0.2601512117096438, -0.07981644418336205, -0.09850237424393277, 0.36106207865484796, -0.08824953270032183, -0.11416369322994417, 0.17623264159863958, -0.21537079735771641, -0.04759611949263202, 0.1690927526944286, 0.08496799002718794, 0.14183389235308375, -0.1094303897084351, 0.09232261319898048, 0.08270214319965996, 0.24010315220188963, 0.20815523529097765, 0.06037515461455089, 0.22584260573897225, 0.18044275751818423, 0.024068518040271904, 0.16005248203745706, -0.1202322696182099, 0.028981054764609417, -0.21295872362391963, -0.15755600693308144, -0.21259950274335487, -0.03694421376337062, -0.08787983511545783, -0.16161897913188222, 0.3636329970731922, 0.06446559785015799, 0.16035557850929244, -0.09754625854215451, 0.18416235691120664, 0.09218442491204529, 0.10166516074665137, 0.0027601192602990095, 0.23432732047001412, 0.14275570443555058, 0.1385494515883153, -0.35274620597240525, 0.08391614285154411, -0.044872320287830225] |
1,802.02768 | Hyperelastic constitutive modeling with exponential decay and
application to a viscoelastic adhesive | Hyperelastic materials models are well established to describe the non-linear
stress-strain relations of elastomers. In this paper, a polyurethane adhesive
is considered as an exemplary material and subjected to tensile, compressive
and shear tests. Conventional hyperelastic models are unable to capture the
mechanical behaviour satisfyingly: If the model agrees with the test results at
large strains, it underestimates the stiffness at low strains significantly. We
propose a model extension to describe a kind of exponential decay of stiffness
which bears some similarity with a specific model developed by Yeoh. The new
hyperelastic model is coupled with linear viscoelasticity to account for the
strain rate dependence observed for the tested material. The model parameters
are identified using a tensile test at a single strain rate only and a creep
test. Furthermore, the compressibility is determined by comparison of the
stiffness in two butt joint tests with different aspect rations of the adhesive
layer. Using this parameter set the new model provides a very good prediction
of tensile, compressive and shear tests at different strain rates.
| cond-mat.soft cond-mat.mtrl-sci | hyperelastic materials models are well established to describe the nonlinear stressstrain relations of elastomers in this paper a polyurethane adhesive is considered as an exemplary material and subjected to tensile compressive and shear tests conventional hyperelastic models are unable to capture the mechanical behaviour satisfyingly if the model agrees with the test results at large strains it underestimates the stiffness at low strains significantly we propose a model extension to describe a kind of exponential decay of stiffness which bears some similarity with a specific model developed by yeoh the new hyperelastic model is coupled with linear viscoelasticity to account for the strain rate dependence observed for the tested material the model parameters are identified using a tensile test at a single strain rate only and a creep test furthermore the compressibility is determined by comparison of the stiffness in two butt joint tests with different aspect rations of the adhesive layer using this parameter set the new model provides a very good prediction of tensile compressive and shear tests at different strain rates | [['hyperelastic', 'materials', 'models', 'are', 'well', 'established', 'to', 'describe', 'the', 'nonlinear', 'stressstrain', 'relations', 'of', 'elastomers', 'in', 'this', 'paper', 'a', 'polyurethane', 'adhesive', 'is', 'considered', 'as', 'an', 'exemplary', 'material', 'and', 'subjected', 'to', 'tensile', 'compressive', 'and', 'shear', 'tests', 'conventional', 'hyperelastic', 'models', 'are', 'unable', 'to', 'capture', 'the', 'mechanical', 'behaviour', 'satisfyingly', 'if', 'the', 'model', 'agrees', 'with', 'the', 'test', 'results', 'at', 'large', 'strains', 'it', 'underestimates', 'the', 'stiffness', 'at', 'low', 'strains', 'significantly', 'we', 'propose', 'a', 'model', 'extension', 'to', 'describe', 'a', 'kind', 'of', 'exponential', 'decay', 'of', 'stiffness', 'which', 'bears', 'some', 'similarity', 'with', 'a', 'specific', 'model', 'developed', 'by', 'yeoh', 'the', 'new', 'hyperelastic', 'model', 'is', 'coupled', 'with', 'linear', 'viscoelasticity', 'to', 'account', 'for', 'the', 'strain', 'rate', 'dependence', 'observed', 'for', 'the', 'tested', 'material', 'the', 'model', 'parameters', 'are', 'identified', 'using', 'a', 'tensile', 'test', 'at', 'a', 'single', 'strain', 'rate', 'only', 'and', 'a', 'creep', 'test', 'furthermore', 'the', 'compressibility', 'is', 'determined', 'by', 'comparison', 'of', 'the', 'stiffness', 'in', 'two', 'butt', 'joint', 'tests', 'with', 'different', 'aspect', 'rations', 'of', 'the', 'adhesive', 'layer', 'using', 'this', 'parameter', 'set', 'the', 'new', 'model', 'provides', 'a', 'very', 'good', 'prediction', 'of', 'tensile', 'compressive', 'and', 'shear', 'tests', 'at', 'different', 'strain', 'rates']] | [-0.0931786257538131, 0.13442323435622805, -0.06358619063059617, -0.00489393842270084, -0.05749766393859025, -0.1971710003676942, 0.010344606570647922, 0.36114676343277097, -0.29477095698680855, -0.27919908933041765, 0.07182949637437518, -0.23021495198274308, -0.15158161555748734, 0.19167232788274943, -0.020983193186111748, 0.10038500787401251, 0.03647825172326217, -0.01548490880710212, -0.07455561068524531, -0.19714303450102263, 0.23606670315473757, 0.09188988625510842, 0.371639598808626, 0.014322580686695445, 0.1011944261942214, -0.024301109825804208, 0.04036774822435845, 0.08426992498852055, -0.2090714593824727, 0.07242771073233807, 0.2163613696130419, -0.014523235874371128, 0.24422239707033525, -0.43673382293240265, -0.23618698768831534, 0.03509883867207401, 0.03658563960825318, 0.12018141611786988, -0.015012182938951957, -0.22039465587077683, 0.0832000750604744, -0.18246906171231692, -0.10958460524179618, -0.09348403855933454, -0.004909684110316448, 0.053311732594972884, -0.30172354954926445, 0.1449920167472754, 0.014114243925104838, 0.08551380208870075, -0.14226387933314102, -0.1064345492478246, -0.02495541666559447, 0.062143784292020846, 0.12965273324683865, -0.00269443118655733, 0.18119414120607463, -0.1455826993212746, -0.04408052761171912, 0.4193753036509814, -0.04057090506446013, -0.20330702317340016, 0.2115923601507755, -0.09422926210273785, -0.09441945600960987, 0.128634682492535, 0.20535399379936614, 0.048883070446679305, -0.16033694177234395, 0.007215920528136033, -0.003352244302962275, 0.18296857005327768, 0.04983429843559861, -0.0856591366825561, 0.18879468400357827, 0.24909175991284094, -0.0469976763091125, 0.1726123908596199, -0.1048183699256216, -0.012355445346918128, -0.3014673164385992, -0.1348051112051518, -0.17386209523043028, 0.0040320301623800875, -0.13098175743368626, -0.19090286688343888, 0.3759066386773648, 0.11494932579147246, 0.17910065053394814, 0.09729541264388752, 0.23963157717277692, 0.07622467371209955, 0.08675396490183755, 0.014490896037533202, 0.32617805225740526, 0.15802726685604745, 0.07847344392814257, -0.21028481587772954, 0.1289236156280613, 0.025801476848515116] |
1,802.02769 | The photon polarization in radiative $D$ decays, phenomenologically | We work out the phenomenology of untagged time-dependent analysis with
radiative $D^0$-decays into CP eigenstates, which allows to probe the photon
polarization by means of the charm mesons' finite width difference. We show
that $D^0 \to \phi \gamma$ or $D^0 \to \bar K^{0 *} \gamma$ decays, which are
SM-dominated, or SM-like, respectively, together with U-spin allow to obtain
chirality-predictions for radiative decay amplitudes. The order of magnitude of
wrong-chirality contributions in the SM can be cross-checked with an up-down
asymmetry in $D^0 \to \bar K_1^0 (\to \bar K \pi \pi) \gamma$. We explore the
sensitivity to new physics in $|\Delta c|=|\Delta u|=1$ dipole couplings in the
decays $D^0 \to \rho^0 \gamma$. We point out the possibility to test the SM
with $D_s \to K_1^+( \to K \pi \pi) \gamma$ decays.
| hep-ph hep-ex | we work out the phenomenology of untagged timedependent analysis with radiative d0decays into cp eigenstates which allows to probe the photon polarization by means of the charm mesons finite width difference we show that d0 to phi gamma or d0 to bar k0 gamma decays which are smdominated or smlike respectively together with uspin allow to obtain chiralitypredictions for radiative decay amplitudes the order of magnitude of wrongchirality contributions in the sm can be crosschecked with an updown asymmetry in d0 to bar k_10 to bar k pi pi gamma we explore the sensitivity to new physics in delta cdelta u1 dipole couplings in the decays d0 to rho0 gamma we point out the possibility to test the sm with d_s to k_1 to k pi pi gamma decays | [['we', 'work', 'out', 'the', 'phenomenology', 'of', 'untagged', 'timedependent', 'analysis', 'with', 'radiative', 'd0decays', 'into', 'cp', 'eigenstates', 'which', 'allows', 'to', 'probe', 'the', 'photon', 'polarization', 'by', 'means', 'of', 'the', 'charm', 'mesons', 'finite', 'width', 'difference', 'we', 'show', 'that', 'd0', 'to', 'phi', 'gamma', 'or', 'd0', 'to', 'bar', 'k0', 'gamma', 'decays', 'which', 'are', 'smdominated', 'or', 'smlike', 'respectively', 'together', 'with', 'uspin', 'allow', 'to', 'obtain', 'chiralitypredictions', 'for', 'radiative', 'decay', 'amplitudes', 'the', 'order', 'of', 'magnitude', 'of', 'wrongchirality', 'contributions', 'in', 'the', 'sm', 'can', 'be', 'crosschecked', 'with', 'an', 'updown', 'asymmetry', 'in', 'd0', 'to', 'bar', 'k_10', 'to', 'bar', 'k', 'pi', 'pi', 'gamma', 'we', 'explore', 'the', 'sensitivity', 'to', 'new', 'physics', 'in', 'delta', 'cdelta', 'u1', 'dipole', 'couplings', 'in', 'the', 'decays', 'd0', 'to', 'rho0', 'gamma', 'we', 'point', 'out', 'the', 'possibility', 'to', 'test', 'the', 'sm', 'with', 'd_s', 'to', 'k_1', 'to', 'k', 'pi', 'pi', 'gamma', 'decays']] | [-0.08224769020383246, 0.261099241224234, -0.09566873753070831, 0.08644592672586442, -0.09669148064404726, -0.17075563648343087, 0.10351459989603609, 0.3214481365941465, -0.2849745130352676, -0.22307546997070313, -0.10696714877523482, -0.3762088814881863, 0.03892274410650134, 0.1035504101999104, 0.11569630259275436, 0.08901098157837987, 0.032331221714615825, 0.018973990531638264, -0.07666779386810958, -0.16554604813456536, 0.22408176177740097, -0.04342683317326009, 0.1248327718898654, 0.09521268815547228, -0.08865658240951597, -0.022301484227180483, -0.043267012000083926, -0.07882920289039612, -0.2061979704781552, 0.014529542066156864, 0.211765477348119, 0.06669925230368971, 0.061250274851918224, -0.317665815487504, -0.031644801437854767, 0.21434637786448002, 0.18436285255476834, 0.06308019442670047, 0.012722905592992901, -0.3746317068785429, 0.18758923755399884, -0.12370941636711359, -0.11403300005942583, -0.10564526085928082, 0.06223514062166214, -0.12844243374466896, -0.3841197047829628, 0.04794560899958014, -0.0556604889780283, 0.030908928845077753, 0.0795281496453099, -0.2442399479970336, -0.02391565728932619, 0.016955012025311588, 0.17259780883044004, 0.13002560393884777, 0.14676952923089265, -0.10252436840347946, -0.16078294981643557, 0.3807200696002692, -0.12736399764847012, -0.22188720297813416, 0.12082878999039531, -0.24515235445881262, -0.12474032955779694, 0.19857770943269135, 0.20241764242574573, 0.01563696167827584, -0.14390031800046563, 0.1638519133999944, 0.0135179432220757, 0.1928742972884793, 0.08389409181103111, 0.045217642677016556, 0.1556353900784161, 0.13562575218081474, 0.01397994614066556, 0.07502358704712242, -0.10129352209158242, -0.030610614847391845, -0.40996722496673466, -0.142335999507457, -0.024849941298365593, 0.1474608460450545, -0.032232768340967596, -0.053575450506061315, 0.35725652652978895, 0.01350083215162158, 0.2725428137257695, -0.005220277052372694, 0.2737266785353422, 0.08381364105641842, 0.03581000319123268, 0.07895727049559355, 0.28328985933959483, 0.23053822920657693, 0.0873063901439309, -0.354174988694489, -0.02320611935853958, 0.026465571271255612] |
1,802.0277 | The Extended Generating Function of the Radical of n and the
abc-Conjecture | An extended generating series of the radical of n, involving two variables,
leads to an identity in said variables, which proves Bombieri's abc-Conjecture
for certain sets of integers.
| math.NT | an extended generating series of the radical of n involving two variables leads to an identity in said variables which proves bombieris abcconjecture for certain sets of integers | [['an', 'extended', 'generating', 'series', 'of', 'the', 'radical', 'of', 'n', 'involving', 'two', 'variables', 'leads', 'to', 'an', 'identity', 'in', 'said', 'variables', 'which', 'proves', 'bombieris', 'abcconjecture', 'for', 'certain', 'sets', 'of', 'integers']] | [-0.24390248442068696, 0.09866630902251927, -0.08296385294358645, 0.03951120961989675, -0.027698385662266185, -0.1343085248954594, 0.01084715745361921, 0.24798912648111582, -0.3374574228322932, -0.20089680087819164, 0.04048297542197231, -0.2432546340195196, -0.09654681052779779, 0.2049044052671109, -0.09904961547415171, -0.001464331489322441, -0.002527371780680759, 0.1101113161005612, -0.006621454276942781, -0.351981288886496, 0.3393041494502021, -0.06091105735062489, 0.15924418305179902, -0.0020730369059102876, 0.11721851214367364, 0.05215741096929248, -0.05198159735716347, -0.00821448303759098, -0.04273656699141221, 0.1509282869020743, 0.27176101026790483, 0.17629178959344113, 0.28607328828158124, -0.4279194174866591, -0.06779909273609519, 0.19632591583233858, 0.15730508057666676, -0.013994733823762675, -0.001414429911944483, -0.2254746224997299, 0.05234570491925946, -0.15075908893985407, -0.18607219157274812, -0.11359156994149089, 0.09997786189030324, 0.03347921388298606, -0.4234022055087345, 0.009101413456457002, 0.11135871266014874, 0.10752128949388862, -0.008944294448675854, -0.1606638438700299, 0.05077922842299033, 0.06778925888439906, 0.05869259272835085, 0.016836089131954526, -0.020937797929426388, -0.07716707838699222, -0.14807037408796273, 0.3507386315613985, -0.02169874849330102, -0.2068668398340898, 0.15948887249188765, -0.1215505134979529, -0.19197574756773456, 0.13340150801065778, 0.05888808655020382, 0.14051952648774854, -0.17085588769987226, 0.11133936034249407, -0.1285179824169193, 0.1771173954475671, 0.13836502653014446, -0.0026048812682607342, 0.16169107166518057, -0.011632350539522511, 0.0799944031917091, 0.18794041193489516, 0.019461410319698707, -0.04983039557139689, -0.3273673259952505, -0.22369896164413408, -0.1704168670943805, 0.1479013128472226, -0.13809803264614726, -0.24243067697222745, 0.36187106450753553, 0.10303437486124624, 0.20126915729737707, 0.0662010052349485, 0.12618912066266472, 0.12906890535461052, 0.051677862548136284, 0.001222817593121103, 0.0009033489706260818, 0.2066832410304674, -0.05837073290188398, -0.1299220865060176, 0.061392182873013165, 0.1468194974918983] |
1,802.02771 | External and mutual synchronization of chimeras in a two layer network
of nonlinear oscillators | We study numerically synchronization phenomena of spatiotemporal structures,
including chimera states, in a two layer network of nonlocally coupled
nonlinear chaotic discrete-time systems. Each of the interacting ensembles
represents a one layer ring network of nonlocally coupled logistic maps in the
chaotic regime. The coupled networks differ in their control parameters that
enables one to observe distinct spatiotemporal dynamics in the networks when
there is no coupling between them. We explore in detail external and mutual
synchronization of chimera structures. The identity of synchronous structures
and the estimation of synchronization regions are quantified by calculating the
cross-correlation coefficient between relevant oscillators of the networks. We
show that for non-identical networks, unidirectional and symmetric couplings
lead to external and mutual synchronization between the interacting ensembles,
respectively. This is confirmed by identical synchronous structures and by the
existence of finite regions of synchronization within which the
cross-correlation coefficient is equal to 1. We also show that these findings
are qualitatively equivalent to the results of the classical synchronization
theory of periodic self-sustained oscillations.
| nlin.AO | we study numerically synchronization phenomena of spatiotemporal structures including chimera states in a two layer network of nonlocally coupled nonlinear chaotic discretetime systems each of the interacting ensembles represents a one layer ring network of nonlocally coupled logistic maps in the chaotic regime the coupled networks differ in their control parameters that enables one to observe distinct spatiotemporal dynamics in the networks when there is no coupling between them we explore in detail external and mutual synchronization of chimera structures the identity of synchronous structures and the estimation of synchronization regions are quantified by calculating the crosscorrelation coefficient between relevant oscillators of the networks we show that for nonidentical networks unidirectional and symmetric couplings lead to external and mutual synchronization between the interacting ensembles respectively this is confirmed by identical synchronous structures and by the existence of finite regions of synchronization within which the crosscorrelation coefficient is equal to 1 we also show that these findings are qualitatively equivalent to the results of the classical synchronization theory of periodic selfsustained oscillations | [['we', 'study', 'numerically', 'synchronization', 'phenomena', 'of', 'spatiotemporal', 'structures', 'including', 'chimera', 'states', 'in', 'a', 'two', 'layer', 'network', 'of', 'nonlocally', 'coupled', 'nonlinear', 'chaotic', 'discretetime', 'systems', 'each', 'of', 'the', 'interacting', 'ensembles', 'represents', 'a', 'one', 'layer', 'ring', 'network', 'of', 'nonlocally', 'coupled', 'logistic', 'maps', 'in', 'the', 'chaotic', 'regime', 'the', 'coupled', 'networks', 'differ', 'in', 'their', 'control', 'parameters', 'that', 'enables', 'one', 'to', 'observe', 'distinct', 'spatiotemporal', 'dynamics', 'in', 'the', 'networks', 'when', 'there', 'is', 'no', 'coupling', 'between', 'them', 'we', 'explore', 'in', 'detail', 'external', 'and', 'mutual', 'synchronization', 'of', 'chimera', 'structures', 'the', 'identity', 'of', 'synchronous', 'structures', 'and', 'the', 'estimation', 'of', 'synchronization', 'regions', 'are', 'quantified', 'by', 'calculating', 'the', 'crosscorrelation', 'coefficient', 'between', 'relevant', 'oscillators', 'of', 'the', 'networks', 'we', 'show', 'that', 'for', 'nonidentical', 'networks', 'unidirectional', 'and', 'symmetric', 'couplings', 'lead', 'to', 'external', 'and', 'mutual', 'synchronization', 'between', 'the', 'interacting', 'ensembles', 'respectively', 'this', 'is', 'confirmed', 'by', 'identical', 'synchronous', 'structures', 'and', 'by', 'the', 'existence', 'of', 'finite', 'regions', 'of', 'synchronization', 'within', 'which', 'the', 'crosscorrelation', 'coefficient', 'is', 'equal', 'to', '1', 'we', 'also', 'show', 'that', 'these', 'findings', 'are', 'qualitatively', 'equivalent', 'to', 'the', 'results', 'of', 'the', 'classical', 'synchronization', 'theory', 'of', 'periodic', 'selfsustained', 'oscillations']] | [-0.2502117133971674, 0.18007322996092295, -0.02543359103323946, 0.04421111484609557, 0.016907944135661972, -0.18661613727522175, 0.012456826131099193, 0.3808255928530418, -0.28384503641040526, -0.24102244915288182, 0.04758410376758037, -0.2649488238786614, -0.25897386436465014, 0.16036671992630985, 0.0060578086481522225, 0.023019034366466497, 0.05451151279716246, 0.04344675836986617, -0.02384933141844445, -0.19511395419827984, 0.3292549574143139, 0.00751332843224164, 0.30086916490125726, -0.04059337443612211, 0.10080099389724956, -0.04545871552069023, 0.0086327060534243, 0.03318382334372584, -0.09753398755869089, 0.10444874594591243, 0.22215920329442498, 0.06557971504053961, 0.251889342164392, -0.4445409380356994, -0.23491617150016522, 0.12888025500054595, 0.15203715927833528, 0.13193465487375225, 0.020860950509494727, -0.3205735316603548, 0.0614230123658975, -0.14146592780915007, -0.09614663483433382, -0.07002094906771131, 0.007056850942712255, 0.08919594782896133, -0.26400180609232327, 0.11861217690053755, 0.06385520903110417, 0.048445074323412274, -0.03588895806879328, 0.004416291612848552, -0.05827460159433254, 0.17064903174034776, -0.023010739292786048, -0.06800645872356904, 0.10700440847135165, -0.12861818779050235, -0.14873481941088076, 0.3155570721624103, -0.06949959631344815, -0.21163049042333812, 0.24452633681374858, -0.12205252775170825, -0.1251901892444108, 0.08617334470849985, 0.194277762013286, 0.06219752350745843, -0.15421880938955895, 0.011840088991107887, -0.02438196826900481, 0.19798993787861685, 0.08293516413384928, 0.06147219935072619, 0.20676222594171675, 0.17253805895891497, 0.06522148024928702, 0.18041792621275093, -0.052118028360398555, -0.18985105910997468, -0.23827601350811228, -0.05061728648068002, -0.13896332798002844, 0.01183606091102487, -0.12138719939480723, -0.16829703384547423, 0.440711871927811, 0.15582316731918353, 0.19535029549914146, 0.03292477440173405, 0.25687672588592997, 0.08875839914364075, 0.03865667246145942, 0.06442359154935033, 0.27904544233300926, 0.20559717144283374, 0.07844989791605077, -0.26370870712627137, 0.039282845503416416, 0.022089151043325053] |
1,802.02772 | On a polynomial scalar perturbation of a Schr\"odinger system in
$L^p$-spaces | In the paper \cite{KLMR} the $L^p$-realization $L_p$ of the matrix
Schr\"odinger operator $\mathcal{L}u=div(Q\nabla u)+Vu$ was studied. The
generation of a semigroup in $L^p(\R^d,\C^m)$ and characterization of the
domain $D(L_p)$ has been established. In this paper we perturb the operator
$L_p$ of by a scalar potential belonging to a class including all polynomials
and show that still we have a strongly continuous semigroup on $L^p(\R^d,\C^m)$
with domain embedded in $W^{2,p}(\R^d,\C^m)$. We also study the analyticity,
compactness, positivity and ultracontractivity of the semigroup and prove
Gaussian kernel estimates. Further kernel estimates and asymptotic behaviour of
eigenvalues of the matrix Schr\"odinger operator are investigated.
| math.AP | in the paper citeklmr the lprealization l_p of the matrix schrodinger operator mathcalludivqnabla uvu was studied the generation of a semigroup in lprdcm and characterization of the domain dl_p has been established in this paper we perturb the operator l_p of by a scalar potential belonging to a class including all polynomials and show that still we have a strongly continuous semigroup on lprdcm with domain embedded in w2prdcm we also study the analyticity compactness positivity and ultracontractivity of the semigroup and prove gaussian kernel estimates further kernel estimates and asymptotic behaviour of eigenvalues of the matrix schrodinger operator are investigated | [['in', 'the', 'paper', 'citeklmr', 'the', 'lprealization', 'l_p', 'of', 'the', 'matrix', 'schrodinger', 'operator', 'mathcalludivqnabla', 'uvu', 'was', 'studied', 'the', 'generation', 'of', 'a', 'semigroup', 'in', 'lprdcm', 'and', 'characterization', 'of', 'the', 'domain', 'dl_p', 'has', 'been', 'established', 'in', 'this', 'paper', 'we', 'perturb', 'the', 'operator', 'l_p', 'of', 'by', 'a', 'scalar', 'potential', 'belonging', 'to', 'a', 'class', 'including', 'all', 'polynomials', 'and', 'show', 'that', 'still', 'we', 'have', 'a', 'strongly', 'continuous', 'semigroup', 'on', 'lprdcm', 'with', 'domain', 'embedded', 'in', 'w2prdcm', 'we', 'also', 'study', 'the', 'analyticity', 'compactness', 'positivity', 'and', 'ultracontractivity', 'of', 'the', 'semigroup', 'and', 'prove', 'gaussian', 'kernel', 'estimates', 'further', 'kernel', 'estimates', 'and', 'asymptotic', 'behaviour', 'of', 'eigenvalues', 'of', 'the', 'matrix', 'schrodinger', 'operator', 'are', 'investigated']] | [-0.08736190829229983, 0.07432343925496465, -0.07148904909722899, 0.07761841088802995, -0.06641953672331415, -0.06811369335965106, -0.016431961774728016, 0.38320509472763853, -0.29018099002147973, -0.16318505741655825, 0.192147829410571, -0.3146458950481917, -0.16008762270702342, 0.16663837920090085, -0.05097812094578617, 0.11917655644938349, 0.0572277027182281, 0.07189363243156358, -0.12122677005092172, -0.1788406060530657, 0.4202037806181531, -0.016579123606023035, 0.2025973499188886, 0.09309914331442039, 0.08814768591699632, -0.022631217147174636, -0.04696084422696578, -0.030919227445204006, -0.14992438069779096, 0.14198834911099095, 0.1913784538653042, 0.09313631652805367, 0.31229964496910967, -0.3964099759334012, -0.22746703200238316, 0.1854029686043137, 0.1480132625242205, -0.0005817391223421223, -0.062457493873999306, -0.30821093836505165, 0.12194912198342775, -0.14472609631913272, -0.16426924840105991, -0.08204260769749741, 0.028172647364829717, 0.053663057909886305, -0.30718939870988066, 0.08860029122075311, 0.14710262870219978, 0.034402630166885884, -0.10800060940122133, -0.09357175571647913, 0.0014857167721186813, 0.053766052817043504, 0.015762380373321082, 0.010668745149221075, 0.05189858014683092, -0.09283239776023516, -0.07598738992513207, 0.30867517352300256, -0.08100209982673588, -0.2476926556935436, 0.11995216162973328, -0.23292620572212494, -0.12025594352989605, 0.03466140679819019, 0.14833672404485312, 0.14038934414029905, -0.15977809790423828, 0.21568145835220714, -0.07460527622974232, 0.10004454548225591, 0.06665201311146743, 0.0678258334188477, 0.034266094775184205, 0.10626000910874848, 0.10853581018010644, 0.17507360930260468, 0.0055648744228835164, -0.07493410001165773, -0.3145772246938003, -0.18215639990215238, -0.2164133017796925, 0.06414098813394575, -0.10600128592846694, -0.20108071210254963, 0.442995828899898, 0.11670537418440768, 0.19100051363930107, 0.08035654918731827, 0.17238961634667296, 0.19239654841979867, 0.02921598565911776, 0.07640140929602479, 0.1816796478178156, 0.20159401350752695, 0.08864864461418046, -0.2249272959846023, 0.024208999753586556, 0.1719084798113296] |
1,802.02773 | The structure and homological properties of generalized standard
Auslander-Reiten components | We describe the structure and homological properties of arbitrary generalized
standard Auslander-Reiten components of artin algebras. In particular, we prove
that for all but finitely many indecomposable modules in such components the
Euler characteristic is defined and nonnegative. Further, we provide a handy
criterion for an infinite Auslander-Reiten component of an artin algebra to be
generalized standard. We solve also the long standing open problem concerning
the structure of artin algebras admitting a~separating family of
Auslander-Reiten components.
| math.RT | we describe the structure and homological properties of arbitrary generalized standard auslanderreiten components of artin algebras in particular we prove that for all but finitely many indecomposable modules in such components the euler characteristic is defined and nonnegative further we provide a handy criterion for an infinite auslanderreiten component of an artin algebra to be generalized standard we solve also the long standing open problem concerning the structure of artin algebras admitting aseparating family of auslanderreiten components | [['we', 'describe', 'the', 'structure', 'and', 'homological', 'properties', 'of', 'arbitrary', 'generalized', 'standard', 'auslanderreiten', 'components', 'of', 'artin', 'algebras', 'in', 'particular', 'we', 'prove', 'that', 'for', 'all', 'but', 'finitely', 'many', 'indecomposable', 'modules', 'in', 'such', 'components', 'the', 'euler', 'characteristic', 'is', 'defined', 'and', 'nonnegative', 'further', 'we', 'provide', 'a', 'handy', 'criterion', 'for', 'an', 'infinite', 'auslanderreiten', 'component', 'of', 'an', 'artin', 'algebra', 'to', 'be', 'generalized', 'standard', 'we', 'solve', 'also', 'the', 'long', 'standing', 'open', 'problem', 'concerning', 'the', 'structure', 'of', 'artin', 'algebras', 'admitting', 'aseparating', 'family', 'of', 'auslanderreiten', 'components']] | [-0.15614330160468326, 0.05659976251167551, -0.12319216793893199, 0.11553330456770614, -0.13145887186922328, -0.1636213320368705, -0.15201754026163958, 0.377184486310733, -0.4401997313099472, -0.16755371077574396, 0.12772806891620062, -0.1813942364043262, -0.13910700040517104, 0.17715859505053805, -0.15059599663302498, -0.007667732682373179, 0.06043895878093807, 0.09181058649808524, -0.04785992533863081, -0.2912486581021528, 0.41033550147212255, -0.0848174887482616, 0.22646550431014284, 0.08711379789747298, 0.1566261953648791, 0.038401695862902624, -0.0029131628873169816, 0.017087351598188673, -0.1500531240175118, 0.12038614577154237, 0.3553072144032309, 0.07972218295694083, 0.1795541581293372, -0.3885099263371606, -0.08906645143992807, 0.21234543893584296, 0.20709123395040238, 0.05046781869360099, -0.02483139519493929, -0.24423662401539714, 0.14052266200489708, -0.24763992129776038, -0.21228726542750864, -0.07209352150216307, 0.10872569190044153, 0.020097445132897088, -0.21814695326151864, 0.0037645550860600594, 0.15633668060610562, 0.16274526805960035, -0.14786538815946856, -0.1294712306024801, -0.02163286774272197, 0.10093526012803379, -0.02848485118623725, -0.03516241611520711, 0.048897278201031055, -0.12177085855632629, -0.15094012408639843, 0.3255347134813507, -0.0360898454060876, -0.26094345007042746, 0.12919080595632917, -0.12136682185442432, -0.21151992174992829, 0.08194826621758311, 0.06304415401169344, 0.1119573762284984, -0.04317363185078935, 0.1969084591515926, -0.1730233156367352, 0.07017581800066278, 0.11987684681509181, 0.025370387305309505, 0.14920908761651894, 0.09849071370033351, 0.03763982099697291, 0.18178487916654712, 0.05207542307968987, -0.004085968916402443, -0.31925917892275674, -0.23623698653261127, -0.035860763634493774, 0.11996708836676062, -0.13137694178294623, -0.2500523422893725, 0.4756388236817561, 0.11124206436675434, 0.1278434321284294, 0.16453448881542213, 0.22713046950459675, 0.037058362810823475, 0.08172579646787581, 0.06615178324404712, 0.09973354579415172, 0.29393783388169187, -0.09033275176280815, -0.09805705766561196, -0.023476521803164167, 0.2157263995123733] |
1,802.02774 | Learning to score the figure skating sports videos | This paper targets at learning to score the figure skating sports videos. To
address this task, we propose a deep architecture that includes two
complementary components, i.e., Self-Attentive LSTM and Multi-scale
Convolutional Skip LSTM. These two components can efficiently learn the local
and global sequential information in each video. Furthermore, we present a
large-scale figure skating sports video dataset -- FisV dataset. This dataset
includes 500 figure skating videos with the average length of 2 minutes and 50
seconds. Each video is annotated by two scores of nine different referees,
i.e., Total Element Score(TES) and Total Program Component Score (PCS). Our
proposed model is validated on FisV and MIT-skate datasets. The experimental
results show the effectiveness of our models in learning to score the figure
skating videos.
| cs.MM cs.CV | this paper targets at learning to score the figure skating sports videos to address this task we propose a deep architecture that includes two complementary components ie selfattentive lstm and multiscale convolutional skip lstm these two components can efficiently learn the local and global sequential information in each video furthermore we present a largescale figure skating sports video dataset fisv dataset this dataset includes 500 figure skating videos with the average length of 2 minutes and 50 seconds each video is annotated by two scores of nine different referees ie total element scoretes and total program component score pcs our proposed model is validated on fisv and mitskate datasets the experimental results show the effectiveness of our models in learning to score the figure skating videos | [['this', 'paper', 'targets', 'at', 'learning', 'to', 'score', 'the', 'figure', 'skating', 'sports', 'videos', 'to', 'address', 'this', 'task', 'we', 'propose', 'a', 'deep', 'architecture', 'that', 'includes', 'two', 'complementary', 'components', 'ie', 'selfattentive', 'lstm', 'and', 'multiscale', 'convolutional', 'skip', 'lstm', 'these', 'two', 'components', 'can', 'efficiently', 'learn', 'the', 'local', 'and', 'global', 'sequential', 'information', 'in', 'each', 'video', 'furthermore', 'we', 'present', 'a', 'largescale', 'figure', 'skating', 'sports', 'video', 'dataset', 'fisv', 'dataset', 'this', 'dataset', 'includes', '500', 'figure', 'skating', 'videos', 'with', 'the', 'average', 'length', 'of', '2', 'minutes', 'and', '50', 'seconds', 'each', 'video', 'is', 'annotated', 'by', 'two', 'scores', 'of', 'nine', 'different', 'referees', 'ie', 'total', 'element', 'scoretes', 'and', 'total', 'program', 'component', 'score', 'pcs', 'our', 'proposed', 'model', 'is', 'validated', 'on', 'fisv', 'and', 'mitskate', 'datasets', 'the', 'experimental', 'results', 'show', 'the', 'effectiveness', 'of', 'our', 'models', 'in', 'learning', 'to', 'score', 'the', 'figure', 'skating', 'videos']] | [-0.06659544360457507, -0.0018898493240083582, -0.050877019245326366, 0.028044002141124097, -0.09444207204582139, -0.16235599821799848, 0.007904072886630588, 0.4672688295240285, -0.2462838715568307, -0.38156465362360487, 0.039921687570492144, -0.35056040420523293, -0.15159952228881235, 0.16311805482121702, -0.14245036612150305, 0.034733632924874906, 0.18330193089977762, 0.08426102956940161, -0.020077877878364115, -0.37429233254162503, 0.24309200195778832, 0.015336662994413332, 0.3336111747384926, 0.033527871517495055, 0.18874609248605786, -0.05975510052512171, -0.08156108275365054, -0.019924889639264247, -0.08066202096334997, 0.1596107724157055, 0.32425964892533304, 0.1941998446012893, 0.34543204975512914, -0.3652802071549365, -0.16673323510932264, 0.031175056407533465, 0.08461417949025626, 0.04707795049583436, 0.027943646696541213, -0.3396361784887363, 0.11813241742612397, -0.19585141037270182, 0.0701875710997303, -0.1163255905381358, 0.02187215032239185, -0.05556013529784367, -0.28331242704794546, 0.07698789397521769, 0.029425838778986305, 0.08731530027151047, -0.042213906696055285, -0.14327821814928388, 0.03348815477582947, 0.1870765187548565, 0.03576663842894229, 0.04971239973741324, 0.18029646179257114, -0.17264774500690094, -0.1606526437795675, 0.36403571237183985, -0.07952912206204273, -0.16716615944436644, 0.14322044568701234, -0.011821491284998225, -0.12838540794556869, 0.0977715603610287, 0.24146146442050298, 0.13177002802277443, -0.19413913414645634, -0.1140541688612563, -0.10988318678812262, 0.24810915255583213, 0.07554796002957909, -0.04536706004215435, 0.18199711337258093, 0.2684998571200938, -0.027842035197550775, 0.14748306869964314, -0.20737849707098785, -0.0546436183866434, -0.20853483230333592, -0.13019988716381495, -0.15243187740628347, -0.04517723137482268, -0.1515736821002363, -0.08777760292298913, 0.47110363141801515, 0.24606120188293032, 0.16171474645301206, 0.13096081323875877, 0.34720456731108734, -0.06395119076335161, 0.11571316545462755, 0.09668687630595532, 0.13862628245642256, -0.08024082914639845, 0.15026655143172649, -0.15961236914344987, 0.034006425862765456, 0.059286792907619575] |
1,802.02775 | Aspects of braneworld cosmology and holography | In a holographic braneworld universe a cosmological fluid occupies a 3+1
dimensional brane located at the boundary of the asymptotic AdS$_5$ bulk. The
AdS/CFT correspondence and the second Randall-Sundrum model are combined to
establish a relationship between the RSII braneworld cosmology and the boundary
metric induced by the time dependent bulk geometry. Some physically interesting
scenarios are discussed in the framework of the Friedmann Robertson Walker
cosmology involving the RSII and holographic braneworlds.
| hep-th gr-qc | in a holographic braneworld universe a cosmological fluid occupies a 31 dimensional brane located at the boundary of the asymptotic ads_5 bulk the adscft correspondence and the second randallsundrum model are combined to establish a relationship between the rsii braneworld cosmology and the boundary metric induced by the time dependent bulk geometry some physically interesting scenarios are discussed in the framework of the friedmann robertson walker cosmology involving the rsii and holographic braneworlds | [['in', 'a', 'holographic', 'braneworld', 'universe', 'a', 'cosmological', 'fluid', 'occupies', 'a', '31', 'dimensional', 'brane', 'located', 'at', 'the', 'boundary', 'of', 'the', 'asymptotic', 'ads_5', 'bulk', 'the', 'adscft', 'correspondence', 'and', 'the', 'second', 'randallsundrum', 'model', 'are', 'combined', 'to', 'establish', 'a', 'relationship', 'between', 'the', 'rsii', 'braneworld', 'cosmology', 'and', 'the', 'boundary', 'metric', 'induced', 'by', 'the', 'time', 'dependent', 'bulk', 'geometry', 'some', 'physically', 'interesting', 'scenarios', 'are', 'discussed', 'in', 'the', 'framework', 'of', 'the', 'friedmann', 'robertson', 'walker', 'cosmology', 'involving', 'the', 'rsii', 'and', 'holographic', 'braneworlds']] | [-0.1585593182363943, 0.11708694943290664, -0.11743363904549856, 0.1576414643340323, -0.14397443170110658, -0.23706624596953801, -0.06309389413576828, 0.25213247652433507, -0.14772863029055808, -0.25481329290579036, 0.07177537525780754, -0.2556272301637912, -0.07727294482214198, 0.07634615729409844, -0.08270956508253943, -0.006017103268165295, -0.05145811508266153, 0.029121457280157362, -0.07421035391648542, -0.2437887768395092, 0.37932000320710957, 0.05580377879820458, 0.29256614577025175, 0.016448673090502006, 0.11656902895041116, -0.10060064258908674, -0.018627655596714723, 0.08920735530300092, -0.2610049614784856, 0.07429322130876044, 0.21499731232195277, 0.05426367152839491, 0.14893731368348412, -0.4463185224528999, -0.31495973351730466, 0.054312042547517446, 0.13470577726727478, 0.17004051932120975, -0.05084949738205704, -0.3371561279852096, -0.023910758812745958, -0.15577455464597434, -0.1384579500834113, 0.06130624304793469, -0.0029625828849942715, -0.18346615518405013, -0.19404298059438188, 0.15908008714984745, -0.03635587619796191, -0.06086397065130407, -0.10592553305937207, 0.009076065999417477, -0.05310271891816328, 0.003919180705090857, 0.13174295626829494, 0.031713720053842626, 0.12011735238396397, -0.13971090851136728, -0.09881862925926913, 0.3690932428987365, -0.10059606508441167, -0.22023108193319138, 0.1510736607015133, -0.17015703345891342, -0.09195481102964649, -0.004814645450893943, 0.08755039558937289, 0.12857279906125918, -0.18334357758141953, 0.27009719537255317, -0.005849239700282477, 0.06890260789875094, 0.17423525858313255, 0.03817810290429282, 0.33879098108625166, 0.1700776813915382, -0.05397949862765939, 0.1735249959468229, -0.05152184945492916, -0.1630424244507943, -0.4913676796506529, -0.15844714549714572, -0.1577939474317309, 0.055957213962731296, -0.3164318454292785, -0.1796486905635628, 0.34527012670080953, 0.07316959670614069, 0.18451218152010482, -0.00033673063583978234, 0.20740950518377024, -0.02652765029709633, -0.04401216918781196, 0.12313483606972923, 0.3192701806487318, 0.15895199658642586, 0.18920816645689614, -0.2668338743240209, -0.1007524729540495, 0.1537258718896351] |
1,802.02776 | Measurement process and inversions using helioseismic normal-mode
coupling | Normal modes are coupled by the presence of perturbations in the Sun,
providing a novel and under-appreciated helioseismic technique with which to
image the solar interior. The process of measuring coupling between normal
modes is straightforward, much more so when compared with other prevalent
helioseismic techniques. The theoretical framework to interpret these
measurements is well developed with the caveat that it applies only in the case
where the entire surface of the Sun is observed. In practice however, the
limited visibility of the Sun and line-of-sight related effects diminish the
resolution of the technique. Here, we compute realistic sensitivities of
normal-mode coupling measurements to flows in the solar interior and describe
how to mitigate the sometimes-overwhelming effect of leakage. The importance of
being able to isolate individual spherical harmonics and observe the full Sun,
to which future solar observatories may aspire, is thus highlighted in our
results. In the latter part of the article, we describe the noise model for the
variance of coupling coefficients, a critical component to the process of
inference.
| astro-ph.SR | normal modes are coupled by the presence of perturbations in the sun providing a novel and underappreciated helioseismic technique with which to image the solar interior the process of measuring coupling between normal modes is straightforward much more so when compared with other prevalent helioseismic techniques the theoretical framework to interpret these measurements is well developed with the caveat that it applies only in the case where the entire surface of the sun is observed in practice however the limited visibility of the sun and lineofsight related effects diminish the resolution of the technique here we compute realistic sensitivities of normalmode coupling measurements to flows in the solar interior and describe how to mitigate the sometimesoverwhelming effect of leakage the importance of being able to isolate individual spherical harmonics and observe the full sun to which future solar observatories may aspire is thus highlighted in our results in the latter part of the article we describe the noise model for the variance of coupling coefficients a critical component to the process of inference | [['normal', 'modes', 'are', 'coupled', 'by', 'the', 'presence', 'of', 'perturbations', 'in', 'the', 'sun', 'providing', 'a', 'novel', 'and', 'underappreciated', 'helioseismic', 'technique', 'with', 'which', 'to', 'image', 'the', 'solar', 'interior', 'the', 'process', 'of', 'measuring', 'coupling', 'between', 'normal', 'modes', 'is', 'straightforward', 'much', 'more', 'so', 'when', 'compared', 'with', 'other', 'prevalent', 'helioseismic', 'techniques', 'the', 'theoretical', 'framework', 'to', 'interpret', 'these', 'measurements', 'is', 'well', 'developed', 'with', 'the', 'caveat', 'that', 'it', 'applies', 'only', 'in', 'the', 'case', 'where', 'the', 'entire', 'surface', 'of', 'the', 'sun', 'is', 'observed', 'in', 'practice', 'however', 'the', 'limited', 'visibility', 'of', 'the', 'sun', 'and', 'lineofsight', 'related', 'effects', 'diminish', 'the', 'resolution', 'of', 'the', 'technique', 'here', 'we', 'compute', 'realistic', 'sensitivities', 'of', 'normalmode', 'coupling', 'measurements', 'to', 'flows', 'in', 'the', 'solar', 'interior', 'and', 'describe', 'how', 'to', 'mitigate', 'the', 'sometimesoverwhelming', 'effect', 'of', 'leakage', 'the', 'importance', 'of', 'being', 'able', 'to', 'isolate', 'individual', 'spherical', 'harmonics', 'and', 'observe', 'the', 'full', 'sun', 'to', 'which', 'future', 'solar', 'observatories', 'may', 'aspire', 'is', 'thus', 'highlighted', 'in', 'our', 'results', 'in', 'the', 'latter', 'part', 'of', 'the', 'article', 'we', 'describe', 'the', 'noise', 'model', 'for', 'the', 'variance', 'of', 'coupling', 'coefficients', 'a', 'critical', 'component', 'to', 'the', 'process', 'of', 'inference']] | [-0.0702815042276661, 0.13325326236338506, -0.047412079779585545, 0.07872130660970744, -0.08619688031653505, -0.06996901899706139, 0.022023950073310327, 0.343093293323723, -0.2529827140943082, -0.32008736358879697, 0.10399101030617562, -0.26853018854528143, -0.15699297738895038, 0.2003646826569186, -0.05692066065188725, 0.02047251876400307, 0.0544574131781701, 0.02850147208901458, -0.04640095789922228, -0.1974900417073175, 0.28129680118615585, 0.09977321569038945, 0.27588893073545984, 0.028445364728699938, 0.05188993398955655, -0.037432270353324276, -0.06825880216316829, 0.016168086924576632, -0.0984124583341496, 0.12020500879843048, 0.2420180097636381, 0.11256057296359781, 0.23878839651804937, -0.4545833285638066, -0.22804581115108935, 0.07165417278748612, 0.13900828042316662, 0.0947246209726409, -0.017656965066592863, -0.265054466929774, 0.0625712074346835, -0.11393453530442013, -0.14557961765730884, -0.051332762987396224, -0.01281797992292965, -0.016909728114368652, -0.28039498788813605, 0.07043705661483325, 0.05191472708315285, 0.051252605122795634, -0.0423462854638739, -0.07418113095187691, -0.03759750574123288, 0.16362565828823664, 0.09481602011358116, 0.018162680686949643, 0.12581995998469972, -0.12910298830193337, -0.06515111204177185, 0.3925632708976695, -0.0810606560553424, -0.17893957250567458, 0.19857475872091992, -0.20261922396914384, -0.09995307860527794, 0.11181117681688954, 0.17275392839943632, 0.11729007808025926, -0.13184952140465273, 0.04710900914032272, 0.0026367812276666246, 0.1415225925001175, 0.02394878577243342, 0.03281228012150847, 0.20293764807392173, 0.15218626146900555, 0.07554322860825016, 0.10905948908881793, -0.17553826315101062, -0.08149795777429718, -0.2601977635045038, -0.13156970927686712, -0.15093951808494452, 0.0126861036169007, -0.0632535253112004, -0.15108968466953482, 0.4091737763766676, 0.23344197139606898, 0.19062078974567093, -0.001776468639565242, 0.351298330113465, 0.1088738995949402, 0.09274873804560928, 0.037630239571986156, 0.32643396812179776, 0.17485447903840565, 0.10365740391750668, -0.25162537705876087, 0.051394075846981774, -0.0003612982244555687] |
1,802.02777 | Transient dynamics of electric double-layer capacitors: Exact
expressions within the Debye-Falkenhagen approximation | We revisit a classical problem of theoretical electrochemistry: the response
of an electric double layer capacitor (EDLC) subject to a small, suddenly
applied external potential. We solve the Debye-Falkenhagen equation to obtain
exact expressions for key EDLC quantities: the ionic charge density, the ionic
current density, and the electric field. In contrast to earlier works, our
results are not restricted to the long-time asymptotics of those quantities.
The solutions take the form of infinite sums whose successive terms all decay
exponentially with increasingly short relaxation times. Importantly, this set
of relaxation times is the same among all aforementioned EDLC quantities; this
property is demanded on physical grounds but not generally achieved within
approximation schemes. The scaling of the largest relaxation timescale
$\tau_{1}$, that determines the long-time decay, is in accordance with earlier
results: depending on the Debye length, $\lambda_{D}$, and the electrode
separation, $2L$, it amounts to $\tau_{1}\simeq\lambda_{D} L/D$ for
$L\gg\lambda_{D}$, and $\tau_{1} \simeq 4 L^2/(\pi^2 D)$ for $L\ll\lambda_{D}$,
respectively (with $D$ being the ionic diffusivity).
| physics.chem-ph cond-mat.soft cond-mat.stat-mech | we revisit a classical problem of theoretical electrochemistry the response of an electric double layer capacitor edlc subject to a small suddenly applied external potential we solve the debyefalkenhagen equation to obtain exact expressions for key edlc quantities the ionic charge density the ionic current density and the electric field in contrast to earlier works our results are not restricted to the longtime asymptotics of those quantities the solutions take the form of infinite sums whose successive terms all decay exponentially with increasingly short relaxation times importantly this set of relaxation times is the same among all aforementioned edlc quantities this property is demanded on physical grounds but not generally achieved within approximation schemes the scaling of the largest relaxation timescale tau_1 that determines the longtime decay is in accordance with earlier results depending on the debye length lambda_d and the electrode separation 2l it amounts to tau_1simeqlambda_d ld for lgglambda_d and tau_1 simeq 4 l2pi2 d for llllambda_d respectively with d being the ionic diffusivity | [['we', 'revisit', 'a', 'classical', 'problem', 'of', 'theoretical', 'electrochemistry', 'the', 'response', 'of', 'an', 'electric', 'double', 'layer', 'capacitor', 'edlc', 'subject', 'to', 'a', 'small', 'suddenly', 'applied', 'external', 'potential', 'we', 'solve', 'the', 'debyefalkenhagen', 'equation', 'to', 'obtain', 'exact', 'expressions', 'for', 'key', 'edlc', 'quantities', 'the', 'ionic', 'charge', 'density', 'the', 'ionic', 'current', 'density', 'and', 'the', 'electric', 'field', 'in', 'contrast', 'to', 'earlier', 'works', 'our', 'results', 'are', 'not', 'restricted', 'to', 'the', 'longtime', 'asymptotics', 'of', 'those', 'quantities', 'the', 'solutions', 'take', 'the', 'form', 'of', 'infinite', 'sums', 'whose', 'successive', 'terms', 'all', 'decay', 'exponentially', 'with', 'increasingly', 'short', 'relaxation', 'times', 'importantly', 'this', 'set', 'of', 'relaxation', 'times', 'is', 'the', 'same', 'among', 'all', 'aforementioned', 'edlc', 'quantities', 'this', 'property', 'is', 'demanded', 'on', 'physical', 'grounds', 'but', 'not', 'generally', 'achieved', 'within', 'approximation', 'schemes', 'the', 'scaling', 'of', 'the', 'largest', 'relaxation', 'timescale', 'tau_1', 'that', 'determines', 'the', 'longtime', 'decay', 'is', 'in', 'accordance', 'with', 'earlier', 'results', 'depending', 'on', 'the', 'debye', 'length', 'lambda_d', 'and', 'the', 'electrode', 'separation', '2l', 'it', 'amounts', 'to', 'tau_1simeqlambda_d', 'ld', 'for', 'lgglambda_d', 'and', 'tau_1', 'simeq', '4', 'l2pi2', 'd', 'for', 'llllambda_d', 'respectively', 'with', 'd', 'being', 'the', 'ionic', 'diffusivity']] | [-0.14943630820180484, 0.14771959306839294, -0.04755806122665052, 0.049022774048937186, -0.0033243961436788976, -0.13808472770162755, 0.0437130536201387, 0.31747155026015306, -0.2481571996935218, -0.2586669318038786, 0.07065869990181477, -0.2751306953112721, -0.0776503091853365, 0.18962914883130355, 0.01545543447683025, 0.04658120896864501, -0.009851409302001107, 0.04671313413016406, -0.08732975584908997, -0.23368077223723824, 0.2316332366460335, 0.02492929190500743, 0.2821132990834878, 0.08827512942967408, 0.054472619805622985, -0.005743941654347711, 0.01589091061463545, 0.026552454025174182, -0.17767407114777956, 0.08137895448498404, 0.20726773644622162, 0.014724471359111277, 0.23889072035959588, -0.45203295322480025, -0.16856029047918172, 0.08769347059344988, 0.15606298305548405, 0.11445126163681256, 0.026136340560495026, -0.21219301157067588, 0.0799447017977658, -0.1369172846697225, -0.1377149929298249, -0.044026470655448915, 0.10096730413792057, 0.07247176152412538, -0.2869368432388629, 0.1261527916793079, 0.050644236764824595, -0.004410233720849602, -0.10363993229614686, -0.16748610866129582, 0.04349953579762376, 0.10269502632285434, 0.12212325054950966, 0.04484551066509736, 0.16656174947634156, -0.10019416485361203, -0.05484141392797163, 0.33555949647784417, -0.05397848638542065, -0.20617388687556448, 0.17119455458826305, -0.1780248321334107, -0.08490353216198676, 0.16429463762755472, 0.093080448711084, 0.12726075141288248, -0.156584692204854, 0.09364690785608858, -0.028255931725495575, 0.18012955919106458, 0.0831633324585395, 0.058521400165548666, 0.161480889186036, 0.14573272721364772, 0.05210838003089813, 0.10500925575543976, -0.03826080253031565, -0.11592633230036792, -0.2958487483736036, -0.11245690324030426, -0.17789148219953071, 0.1094499717692537, -0.11264151450863502, -0.16826134868954987, 0.3638820870172945, 0.12695897068292258, 0.20135425664714457, 0.09530466329881254, 0.2790502035001546, 0.15533555406377506, 0.07510913146356477, 0.07755712833669451, 0.21899054422083505, 0.15905484738457878, 0.11953310543717241, -0.27930986333385477, 0.08816701285885992, 0.08934454661564051] |
1,802.02778 | Deuteron: analytical forms of wave function and density distribution | The deuteron wave function can be presented as the table through the
respective massifs of numerically values of radial wave functions. In
calculations such arrays of numbers in the texts of programs to operate quite
difficult. Therefore a used simpler analytical forms is expedient. In the
received analytical forms of deuteron wave function in coordinate
representation it is necessary to calculate density distribution in the
deuteron and transition density and compare them among themselves. On the
received coefficients of the four analytical forms for deuteron wave function
for the nucleon-nucleon potential Reid93 are calculated density distribution
and transition density. For comparison, similar results are given for Moscow
potential. Such calculations help to evaluate the correctness of the choice of
the analytical form for approximation of the wave function, and also to obtain
information about such characteristics of the deuteron as charge form factor,
tensor polarization and momentum distribution.
| nucl-th | the deuteron wave function can be presented as the table through the respective massifs of numerically values of radial wave functions in calculations such arrays of numbers in the texts of programs to operate quite difficult therefore a used simpler analytical forms is expedient in the received analytical forms of deuteron wave function in coordinate representation it is necessary to calculate density distribution in the deuteron and transition density and compare them among themselves on the received coefficients of the four analytical forms for deuteron wave function for the nucleonnucleon potential reid93 are calculated density distribution and transition density for comparison similar results are given for moscow potential such calculations help to evaluate the correctness of the choice of the analytical form for approximation of the wave function and also to obtain information about such characteristics of the deuteron as charge form factor tensor polarization and momentum distribution | [['the', 'deuteron', 'wave', 'function', 'can', 'be', 'presented', 'as', 'the', 'table', 'through', 'the', 'respective', 'massifs', 'of', 'numerically', 'values', 'of', 'radial', 'wave', 'functions', 'in', 'calculations', 'such', 'arrays', 'of', 'numbers', 'in', 'the', 'texts', 'of', 'programs', 'to', 'operate', 'quite', 'difficult', 'therefore', 'a', 'used', 'simpler', 'analytical', 'forms', 'is', 'expedient', 'in', 'the', 'received', 'analytical', 'forms', 'of', 'deuteron', 'wave', 'function', 'in', 'coordinate', 'representation', 'it', 'is', 'necessary', 'to', 'calculate', 'density', 'distribution', 'in', 'the', 'deuteron', 'and', 'transition', 'density', 'and', 'compare', 'them', 'among', 'themselves', 'on', 'the', 'received', 'coefficients', 'of', 'the', 'four', 'analytical', 'forms', 'for', 'deuteron', 'wave', 'function', 'for', 'the', 'nucleonnucleon', 'potential', 'reid93', 'are', 'calculated', 'density', 'distribution', 'and', 'transition', 'density', 'for', 'comparison', 'similar', 'results', 'are', 'given', 'for', 'moscow', 'potential', 'such', 'calculations', 'help', 'to', 'evaluate', 'the', 'correctness', 'of', 'the', 'choice', 'of', 'the', 'analytical', 'form', 'for', 'approximation', 'of', 'the', 'wave', 'function', 'and', 'also', 'to', 'obtain', 'information', 'about', 'such', 'characteristics', 'of', 'the', 'deuteron', 'as', 'charge', 'form', 'factor', 'tensor', 'polarization', 'and', 'momentum', 'distribution']] | [-0.10785686311695876, 0.08826979079497727, -0.10239575020583484, 0.1225659483996522, -0.07197199251527923, -0.04725161501256799, 0.019875648832640837, 0.36436549523794975, -0.2062130404787289, -0.27277142697995577, 0.02475578453615182, -0.29145003992409724, -0.12842866740617398, 0.1883948057720035, 0.09464648492143464, 0.1140006165924943, 0.005834048662674488, 0.05849233287940356, -0.12039205379708595, -0.1700729218915709, 0.33321393829946583, 0.07218335723076519, 0.2664463385197057, 0.09147925521687579, 0.05287542518517758, 0.05779083717710376, -0.012107674628291657, -0.03572005569632795, -0.1173833496113484, 0.09575170212318315, 0.2900033204539402, 0.13444234713647715, 0.18404575109142005, -0.47471099591033683, -0.17828106556742176, 0.042978230199927615, 0.12197826940855766, 0.11581767222378403, -0.03287725622932477, -0.2573619650966312, 0.04369229924427723, -0.21452455508768106, -0.17884876434313687, -0.1326837358820076, 0.07139113029729374, 0.1267359822821753, -0.2910968524567481, 0.0677566413102574, -0.050305617325058255, 0.004392861466397802, -0.10779317348843089, -0.21202691125280754, -0.026509188287073392, 0.11466409137938172, 0.062119882689109326, 0.06591770428191945, 0.12533311081446102, -0.144254592737697, -0.04052510638910069, 0.3796211457119097, -0.050665225901301146, -0.24616299382083723, 0.11539367442270992, -0.16961911790752532, -0.07157367272805926, 0.14154355389670142, 0.19408120994292502, 0.07825547913592812, -0.1509543575340177, 0.027194296769291238, -0.013916516287084763, 0.13964084914658922, 0.14180639487489857, 0.052307064393283545, 0.16234115528798587, 0.10617247924863084, 0.0038562994418867135, 0.11442396083510027, -0.07311662996987768, -0.10132274343758016, -0.2994063313849069, -0.14902873047489068, -0.22197470884468104, 0.02724045296535887, -0.07638854164002082, -0.1558950339708276, 0.400826669548248, 0.11843316974999332, 0.17665844730052757, 0.057661300361458515, 0.29788580542505794, 0.1767659247144931, 0.062046823393855546, 0.04965433375626752, 0.2232753512138073, 0.1957581447361893, 0.08545745658763759, -0.19464211608283222, 0.09749893148624766, 0.034067879481291446] |
1,802.02779 | The Multiphoton Boson Sampling Machine Doesn't Beat Early Classical
Computers for Five-boson Sampling | A new algorithm which is called Store-zechin, and utilizes stored data
repetitively for calculating the permanent of an n * n matrix is proposed. The
analysis manifests that the numbers of multiplications and additions taken by
the new algorithm are respectively far smaller than those taken by the famous
Ryser algorithm. Especially, for a 5-boson sampling task, the running time of
the Store-zechin algorithm computing the correspondent permanent on ENIAC as
well as TRADIC is lower than that of the sampling operation on a multiphoton
boson sampling machine (shortly MPBSM), and thus MPBSM does not beat the early
classical computers (despite of this, it is possible that when n gets large
enough, a quantum boson sampling machine will beat a classical computer). On a
computer, people can design an algorithm that exchanges space for time while on
MPBSM, people can not do so, which is the greatest difference between a
universal computer and MPBSM. This difference is right the reason why MPBSM may
not be called a (photonic) quantum computer.
| cs.CC quant-ph | a new algorithm which is called storezechin and utilizes stored data repetitively for calculating the permanent of an n n matrix is proposed the analysis manifests that the numbers of multiplications and additions taken by the new algorithm are respectively far smaller than those taken by the famous ryser algorithm especially for a 5boson sampling task the running time of the storezechin algorithm computing the correspondent permanent on eniac as well as tradic is lower than that of the sampling operation on a multiphoton boson sampling machine shortly mpbsm and thus mpbsm does not beat the early classical computers despite of this it is possible that when n gets large enough a quantum boson sampling machine will beat a classical computer on a computer people can design an algorithm that exchanges space for time while on mpbsm people can not do so which is the greatest difference between a universal computer and mpbsm this difference is right the reason why mpbsm may not be called a photonic quantum computer | [['a', 'new', 'algorithm', 'which', 'is', 'called', 'storezechin', 'and', 'utilizes', 'stored', 'data', 'repetitively', 'for', 'calculating', 'the', 'permanent', 'of', 'an', 'n', 'n', 'matrix', 'is', 'proposed', 'the', 'analysis', 'manifests', 'that', 'the', 'numbers', 'of', 'multiplications', 'and', 'additions', 'taken', 'by', 'the', 'new', 'algorithm', 'are', 'respectively', 'far', 'smaller', 'than', 'those', 'taken', 'by', 'the', 'famous', 'ryser', 'algorithm', 'especially', 'for', 'a', '5boson', 'sampling', 'task', 'the', 'running', 'time', 'of', 'the', 'storezechin', 'algorithm', 'computing', 'the', 'correspondent', 'permanent', 'on', 'eniac', 'as', 'well', 'as', 'tradic', 'is', 'lower', 'than', 'that', 'of', 'the', 'sampling', 'operation', 'on', 'a', 'multiphoton', 'boson', 'sampling', 'machine', 'shortly', 'mpbsm', 'and', 'thus', 'mpbsm', 'does', 'not', 'beat', 'the', 'early', 'classical', 'computers', 'despite', 'of', 'this', 'it', 'is', 'possible', 'that', 'when', 'n', 'gets', 'large', 'enough', 'a', 'quantum', 'boson', 'sampling', 'machine', 'will', 'beat', 'a', 'classical', 'computer', 'on', 'a', 'computer', 'people', 'can', 'design', 'an', 'algorithm', 'that', 'exchanges', 'space', 'for', 'time', 'while', 'on', 'mpbsm', 'people', 'can', 'not', 'do', 'so', 'which', 'is', 'the', 'greatest', 'difference', 'between', 'a', 'universal', 'computer', 'and', 'mpbsm', 'this', 'difference', 'is', 'right', 'the', 'reason', 'why', 'mpbsm', 'may', 'not', 'be', 'called', 'a', 'photonic', 'quantum', 'computer']] | [-0.1117229425609566, 0.17155108587953358, -0.10926666876823618, 0.09835721776329504, -0.0966879373612223, -0.19015831369679512, 0.057678529395006325, 0.36133131493882437, -0.25850000395439565, -0.3157439958162197, 0.13262900632448357, -0.23881531513591364, -0.15926972386376115, 0.2574979182390962, -0.09761658586879693, 0.02803343114806566, 0.09127126078450734, 0.08397351847052938, -0.03079250580439537, -0.2703558588343695, 0.2201917126665471, 0.055995118575704446, 0.24877432628716456, 0.018292887201646298, 0.09373450344612981, 0.022641248609189216, 0.012035937664289278, -0.007003477854241061, -0.04831464008925761, 0.10819035639387282, 0.23424098737219848, 0.17886022408776803, 0.3239707215121243, -0.40295673905667373, -0.12781255273077433, 0.15766112149264322, 0.17821140479716677, 0.12278683312952791, -0.04074398170810238, -0.2548639677612611, 0.09831432834096454, -0.1374044404776835, -0.03829114007917602, -0.08087837904700214, 0.030179277543694052, -0.02826521592250196, -0.25092929675493664, 0.007328455183064428, 0.06258933348708967, 0.037617956804929346, 0.04427574907014964, -0.12338608861105835, 0.0412259850574362, 0.10453142102743164, -0.012565241771659292, 0.05413888111744621, 0.1196191440983789, -0.13941504680707756, -0.16327523731444848, 0.3902985242226661, -0.0027482220826730154, -0.15326070844014061, 0.1604526015268298, -0.10469661725162552, -0.11507593313652295, 0.13069041937635076, 0.1424280243695759, 0.09223467843300413, -0.10707845761933685, 0.09266410065423016, -0.05698469676440809, 0.1946999094244547, 0.0505888038187106, 0.0006219721867748332, 0.17368981849811063, 0.14871597461112798, 0.07273244514646826, 0.09214606378781155, -0.07324205297215773, -0.13099772665009368, -0.27647636841028567, -0.19409013998931807, -0.27068798003502464, 0.041106835013701264, -0.06924674532300985, -0.1611096426481154, 0.33606873269522247, 0.14107994998453138, 0.1731711655128293, 0.06620845593307621, 0.3358518208331633, 0.10965208534475007, 0.12292853026173828, 0.10879750927539668, 0.20188104198882129, 0.08481772281740588, 0.12051718567480992, -0.190810516425522, 0.10354333527374832, 0.06006384367214107] |
1,802.0278 | Optoelectronics and defect levels in hydroxyapatite by first-principles | Hydroxyapatite (HAp) is an important component of mammal bones and teeth,
being widely used in prosthetic implants. Despite the importance of HAp in
medicine, several promising applications involving this material e.g. in
photo-catalysis), depend on how well we understand its fundamental properties.
Among the ones that are either unknown or not known accurately we have the
electronic band structure and all that relates to it, including the band gap
width. We employ state-of-the-art methodologies, including density
hybrid-functional theory and many-body perturbation theory within the GW
approximation, to look at the optoelectronic properties of HAp. These methods
are also applied to the calculation of defect levels. We find that the use of a
mix of (semi-)local and exact exchange in the exchange-correlation functional,
brings a drastic improvement to the band structure. Important side-effects
include improvements in the description of dielectric and optical properties,
not only involving conduction band (excited) states, but also the valence. We
find that the highly dispersive conduction band bottom of HAp originates from
anti-bonding $\sigma^{*}$ states along the $\cdots\textrm{OH-OH-}\cdots$
infinite chain, suggesting the formation of a conductive 1D-ice phase. The
choice of the exchange-correlation treatment to the calculation of defect
levels was also investigated by using the OH-vacancy as testing-model. We find
that donor and acceptor transitions obtained within semi-local DFT differ from
those of hybrid-DFT by almost 2 eV. Such a large discrepancy emphasizes the
importance of using a high-quality description of the electron-electron
interactions in the calculation of electronic and optical transitions of
defects in HAp.
| cond-mat.mtrl-sci | hydroxyapatite hap is an important component of mammal bones and teeth being widely used in prosthetic implants despite the importance of hap in medicine several promising applications involving this material eg in photocatalysis depend on how well we understand its fundamental properties among the ones that are either unknown or not known accurately we have the electronic band structure and all that relates to it including the band gap width we employ stateoftheart methodologies including density hybridfunctional theory and manybody perturbation theory within the gw approximation to look at the optoelectronic properties of hap these methods are also applied to the calculation of defect levels we find that the use of a mix of semilocal and exact exchange in the exchangecorrelation functional brings a drastic improvement to the band structure important sideeffects include improvements in the description of dielectric and optical properties not only involving conduction band excited states but also the valence we find that the highly dispersive conduction band bottom of hap originates from antibonding sigma states along the cdotstextrmohohcdots infinite chain suggesting the formation of a conductive 1dice phase the choice of the exchangecorrelation treatment to the calculation of defect levels was also investigated by using the ohvacancy as testingmodel we find that donor and acceptor transitions obtained within semilocal dft differ from those of hybriddft by almost 2 ev such a large discrepancy emphasizes the importance of using a highquality description of the electronelectron interactions in the calculation of electronic and optical transitions of defects in hap | [['hydroxyapatite', 'hap', 'is', 'an', 'important', 'component', 'of', 'mammal', 'bones', 'and', 'teeth', 'being', 'widely', 'used', 'in', 'prosthetic', 'implants', 'despite', 'the', 'importance', 'of', 'hap', 'in', 'medicine', 'several', 'promising', 'applications', 'involving', 'this', 'material', 'eg', 'in', 'photocatalysis', 'depend', 'on', 'how', 'well', 'we', 'understand', 'its', 'fundamental', 'properties', 'among', 'the', 'ones', 'that', 'are', 'either', 'unknown', 'or', 'not', 'known', 'accurately', 'we', 'have', 'the', 'electronic', 'band', 'structure', 'and', 'all', 'that', 'relates', 'to', 'it', 'including', 'the', 'band', 'gap', 'width', 'we', 'employ', 'stateoftheart', 'methodologies', 'including', 'density', 'hybridfunctional', 'theory', 'and', 'manybody', 'perturbation', 'theory', 'within', 'the', 'gw', 'approximation', 'to', 'look', 'at', 'the', 'optoelectronic', 'properties', 'of', 'hap', 'these', 'methods', 'are', 'also', 'applied', 'to', 'the', 'calculation', 'of', 'defect', 'levels', 'we', 'find', 'that', 'the', 'use', 'of', 'a', 'mix', 'of', 'semilocal', 'and', 'exact', 'exchange', 'in', 'the', 'exchangecorrelation', 'functional', 'brings', 'a', 'drastic', 'improvement', 'to', 'the', 'band', 'structure', 'important', 'sideeffects', 'include', 'improvements', 'in', 'the', 'description', 'of', 'dielectric', 'and', 'optical', 'properties', 'not', 'only', 'involving', 'conduction', 'band', 'excited', 'states', 'but', 'also', 'the', 'valence', 'we', 'find', 'that', 'the', 'highly', 'dispersive', 'conduction', 'band', 'bottom', 'of', 'hap', 'originates', 'from', 'antibonding', 'sigma', 'states', 'along', 'the', 'cdotstextrmohohcdots', 'infinite', 'chain', 'suggesting', 'the', 'formation', 'of', 'a', 'conductive', '1dice', 'phase', 'the', 'choice', 'of', 'the', 'exchangecorrelation', 'treatment', 'to', 'the', 'calculation', 'of', 'defect', 'levels', 'was', 'also', 'investigated', 'by', 'using', 'the', 'ohvacancy', 'as', 'testingmodel', 'we', 'find', 'that', 'donor', 'and', 'acceptor', 'transitions', 'obtained', 'within', 'semilocal', 'dft', 'differ', 'from', 'those', 'of', 'hybriddft', 'by', 'almost', '2', 'ev', 'such', 'a', 'large', 'discrepancy', 'emphasizes', 'the', 'importance', 'of', 'using', 'a', 'highquality', 'description', 'of', 'the', 'electronelectron', 'interactions', 'in', 'the', 'calculation', 'of', 'electronic', 'and', 'optical', 'transitions', 'of', 'defects', 'in', 'hap']] | [-0.08412645053616179, 0.08951258541445148, -0.05066037380446676, 0.07135949834784387, -0.01508738934382917, -0.11750303526307165, 0.089035963271047, 0.41577860113489723, -0.26599694157645165, -0.30289203841955614, 0.03458579478696788, -0.3200147388962961, -0.16535819509737798, 0.1630997766584143, 0.018029903608415773, 0.006673518752798001, 0.044023035231177406, -0.0149743867842933, -0.09225030347369309, -0.15899921534111655, 0.2847663290838255, 0.048018594954901864, 0.281432240749879, 0.11994506680945817, 0.014887593594202508, 0.030505926560126018, 0.03290855035980926, -0.005883096790823497, -0.12119379011916609, 0.1606907943562465, 0.2846503048543234, 0.0010948890786210777, 0.2570236627265117, -0.4672581683825475, -0.24294880070998842, 0.022408148660776978, 0.11189390147624015, 0.13251669345393416, -0.05441917831253502, -0.23991209852249035, 0.06987433202295124, -0.1646529852256164, -0.0998072754799083, -0.09145066355306067, -0.024735797935534036, 0.038109473237458634, -0.20329061366272674, 0.09975495925401752, 0.007903497452613886, 0.029349011426078916, -0.12314541163139785, -0.1620290997166654, -0.07769486744019018, 0.14703139527663137, 0.04445129858145136, -0.00019444456370641677, 0.15554625090392615, -0.13163760039287992, -0.10067145379829534, 0.4239665983425763, -0.048493479825330046, -0.1257145220870039, 0.20653100649313436, -0.12760026116717818, -0.12525909753169426, 0.1489257203426348, 0.11871811705415217, 0.101309274912431, -0.13398343602031365, 0.09569211147168485, 0.04071979899395838, 0.1709561162059825, 0.06037368954193254, 0.10774365435297853, 0.1887479123262583, 0.1565196364769252, 0.040527164326652675, 0.09500375283582264, -0.10346206708439826, -0.07347559442683331, -0.23936180524923462, -0.14882203017249288, -0.1960391200148512, 0.04729841174939572, -0.047544640635561124, -0.22717140557815657, 0.429157788427886, 0.136823543323267, 0.14454530955288514, -0.053694701730933506, 0.24055219738676328, 0.09332625655153849, 0.09191476436791873, 0.05314753547231648, 0.26642481015046854, 0.149203065253025, 0.057876697830056494, -0.24338020068529223, 0.06635557501557988, 0.02614399270712575] |
1,802.02781 | Characterization, optical properties and electron(exciton)-phonon
interaction in bulk In2Se3 crystals and InSe nanocrystals in In2nSe3
confinement | Complex electron-microscopic, energy-dispersed and wide-temperature optical
absorption and photoluminescence (PL) investigations are carried out into
Bridgeman-grown layered In2Se3 crystals. It is shown that In2Se3 crystals as a
whole have a homogeneous concentration of In and Se atoms, corresponding with
In2Se3 stoichiometry. Nevertheless, In2Se3 crystals contain a significant
amount of dislocations, on which nano-sized interspersions of crystal phases of
pure InSe, In6Se7 and monoclinic red Se settle down. Optical wide-temperature
investigations of In2Se3 allow us to do the following: establish the width of
the band-gap, the exciton binding energy; determine the frequency of a
half-layer A-phonon, which takes part in electron (exciton)-phonon interaction;
and to evaluate the effective masses of carriers and the dielectric
permeability. Finally, blue shift of the band-gap and character of the electron
(exciton)-phonon interaction of nano-sized 3D InSe crystals confined in an
In2Se3 crystal matrix; influence of an InSe nanocrystal radius and of an
ensemble of 3D InSe nanocrystals with different radii for an increase of the
exciton emission/absorption half-width line with temperature and radii of InSe
nanocrystals are discussed.
| cond-mat.mtrl-sci | complex electronmicroscopic energydispersed and widetemperature optical absorption and photoluminescence pl investigations are carried out into bridgemangrown layered in2se3 crystals it is shown that in2se3 crystals as a whole have a homogeneous concentration of in and se atoms corresponding with in2se3 stoichiometry nevertheless in2se3 crystals contain a significant amount of dislocations on which nanosized interspersions of crystal phases of pure inse in6se7 and monoclinic red se settle down optical widetemperature investigations of in2se3 allow us to do the following establish the width of the bandgap the exciton binding energy determine the frequency of a halflayer aphonon which takes part in electron excitonphonon interaction and to evaluate the effective masses of carriers and the dielectric permeability finally blue shift of the bandgap and character of the electron excitonphonon interaction of nanosized 3d inse crystals confined in an in2se3 crystal matrix influence of an inse nanocrystal radius and of an ensemble of 3d inse nanocrystals with different radii for an increase of the exciton emissionabsorption halfwidth line with temperature and radii of inse nanocrystals are discussed | [['complex', 'electronmicroscopic', 'energydispersed', 'and', 'widetemperature', 'optical', 'absorption', 'and', 'photoluminescence', 'pl', 'investigations', 'are', 'carried', 'out', 'into', 'bridgemangrown', 'layered', 'in2se3', 'crystals', 'it', 'is', 'shown', 'that', 'in2se3', 'crystals', 'as', 'a', 'whole', 'have', 'a', 'homogeneous', 'concentration', 'of', 'in', 'and', 'se', 'atoms', 'corresponding', 'with', 'in2se3', 'stoichiometry', 'nevertheless', 'in2se3', 'crystals', 'contain', 'a', 'significant', 'amount', 'of', 'dislocations', 'on', 'which', 'nanosized', 'interspersions', 'of', 'crystal', 'phases', 'of', 'pure', 'inse', 'in6se7', 'and', 'monoclinic', 'red', 'se', 'settle', 'down', 'optical', 'widetemperature', 'investigations', 'of', 'in2se3', 'allow', 'us', 'to', 'do', 'the', 'following', 'establish', 'the', 'width', 'of', 'the', 'bandgap', 'the', 'exciton', 'binding', 'energy', 'determine', 'the', 'frequency', 'of', 'a', 'halflayer', 'aphonon', 'which', 'takes', 'part', 'in', 'electron', 'excitonphonon', 'interaction', 'and', 'to', 'evaluate', 'the', 'effective', 'masses', 'of', 'carriers', 'and', 'the', 'dielectric', 'permeability', 'finally', 'blue', 'shift', 'of', 'the', 'bandgap', 'and', 'character', 'of', 'the', 'electron', 'excitonphonon', 'interaction', 'of', 'nanosized', '3d', 'inse', 'crystals', 'confined', 'in', 'an', 'in2se3', 'crystal', 'matrix', 'influence', 'of', 'an', 'inse', 'nanocrystal', 'radius', 'and', 'of', 'an', 'ensemble', 'of', '3d', 'inse', 'nanocrystals', 'with', 'different', 'radii', 'for', 'an', 'increase', 'of', 'the', 'exciton', 'emissionabsorption', 'halfwidth', 'line', 'with', 'temperature', 'and', 'radii', 'of', 'inse', 'nanocrystals', 'are', 'discussed']] | [-0.0817367352255609, 0.15879946071730783, -0.021948809578870646, -0.05705797177229431, -0.009828284069607477, -0.1352678204032903, 0.08680233085067898, 0.4729805707133242, -0.2139606401767759, -0.2880774023332855, -0.023020514139456542, -0.3290024404469434, -0.077385600629246, 0.14876229658659126, 0.04865700164338618, 0.02488186884494055, -0.006833945611669194, -0.0771743506622789, -0.06983061141051751, -0.19100409003468008, 0.2539210043926557, 0.0530487965692633, 0.3166245175220649, 0.12486472973943732, 0.03275115542748522, -0.00811851098495979, 0.09020175461357992, 0.023138139583309004, -0.17904464982733598, 0.1230323224656656, 0.25249457245185375, -0.09481551738211974, 0.20543408262199678, -0.46068209081533407, -0.21260216578819036, 0.0027163839986314997, 0.1560150836137057, 0.124256600545431, -0.09411604732546645, -0.25922033278870266, 0.031095550559777103, -0.09268212771192859, -0.11676598523765624, -0.03932900785141447, 0.02235462722490497, 0.03519027669348621, -0.2150874520801673, 0.09058107073066085, 0.05124559262878306, 0.05416801262236688, -0.15127589772566266, -0.1430031411717729, -0.11241160602020543, 0.0695891386796055, 0.02458888005570597, -0.031407341394307356, 0.2136751350536499, -0.08821419927486811, -0.04774489573069981, 0.4184321974808838, -0.009312894941970063, -0.06912333926551842, 0.12685700488232432, -0.17754053057268765, -0.01951016037769261, 0.22987028886564076, 0.13219647514744706, 0.09944471508996296, -0.11838008814776826, 0.05967399833960891, -0.035720379359970265, 0.26605253864545375, 0.12269352261708784, 0.11955938031176283, 0.2429909936146855, 0.16794440797128204, 0.009415934588538394, 0.11554519785290938, -0.11455043742205903, -0.004092378062999896, -0.14890029482055633, -0.2562552289344326, -0.20830833257613926, 0.11044164004436295, -0.10506025391242431, -0.2449830237329436, 0.38102486857124385, 0.049152422615277046, 0.16892303636718897, -0.049925987335709146, 0.15854528131395845, 0.06924716369983452, 0.11130237758957914, -0.04860011429575804, 0.27690003850563827, 0.2218517477546508, 0.11232527577972394, -0.29473882223690107, 0.00014758807983959006, -0.020246631507429162] |
1,802.02782 | The Infrared Medium-deep Survey. IV. Low Eddington Ratio of A Faint
Quasar at $z\sim6$: Not Every Supermassive Black Hole is Growing Fast in the
Early Universe | To date, most of the luminous quasars known at $z\sim6$ have been found to be
in maximal accretion with the Eddington ratios, $\lambda_{\rm{Edd}}\sim1$,
suggesting enhanced nuclear activities in the early universe. However, this may
not be the whole picture of supermassive black hole (SMBH) growth since
previous studies have not reached on faint quasars that are more likely to
harbor SMBHs with low $\lambda_{\rm{Edd}}$. To gain a better understanding on
the accretion activities in quasars in the early universe, we obtained a deep
near-infrared (NIR) spectrum of a quasar, IMS J220417.92+011144.8 (hereafter
IMS J2204+0112), one of the faintest quasars that have been identified at
$z\sim6$. From the redshifted C IV $\lambda 1549$ emission line in the NIR
spectrum, we find that IMS J2204+0112 harbors a SMBH with about a billion solar
mass and $\lambda_{\rm{Edd}} \sim 0.1$, but with a large uncertainty in both
quantities (0.41 dex). IMS J2204+0112 has one of the lowest Eddington ratios
among quasars at $z\sim6$, but a common value among quasars at $z\sim2$. Its
low $\lambda_{\rm{Edd}}$ can be explained with two scenarios; the SMBH growth
from a stellar mass black hole through short-duration super-Eddington accretion
events or from a massive black hole seed ($\sim10^{5}\,M_{\odot}$) with
Eddington-limited accretion. NIR spectra of more faint quasars are needed to
better understand the accretion activities of SMBHs at $z \sim 6$.
| astro-ph.GA | to date most of the luminous quasars known at zsim6 have been found to be in maximal accretion with the eddington ratios lambda_rmeddsim1 suggesting enhanced nuclear activities in the early universe however this may not be the whole picture of supermassive black hole smbh growth since previous studies have not reached on faint quasars that are more likely to harbor smbhs with low lambda_rmedd to gain a better understanding on the accretion activities in quasars in the early universe we obtained a deep nearinfrared nir spectrum of a quasar ims j220417920111448 hereafter ims j22040112 one of the faintest quasars that have been identified at zsim6 from the redshifted c iv lambda 1549 emission line in the nir spectrum we find that ims j22040112 harbors a smbh with about a billion solar mass and lambda_rmedd sim 01 but with a large uncertainty in both quantities 041 dex ims j22040112 has one of the lowest eddington ratios among quasars at zsim6 but a common value among quasars at zsim2 its low lambda_rmedd can be explained with two scenarios the smbh growth from a stellar mass black hole through shortduration supereddington accretion events or from a massive black hole seed sim105m_odot with eddingtonlimited accretion nir spectra of more faint quasars are needed to better understand the accretion activities of smbhs at z sim 6 | [['to', 'date', 'most', 'of', 'the', 'luminous', 'quasars', 'known', 'at', 'zsim6', 'have', 'been', 'found', 'to', 'be', 'in', 'maximal', 'accretion', 'with', 'the', 'eddington', 'ratios', 'lambda_rmeddsim1', 'suggesting', 'enhanced', 'nuclear', 'activities', 'in', 'the', 'early', 'universe', 'however', 'this', 'may', 'not', 'be', 'the', 'whole', 'picture', 'of', 'supermassive', 'black', 'hole', 'smbh', 'growth', 'since', 'previous', 'studies', 'have', 'not', 'reached', 'on', 'faint', 'quasars', 'that', 'are', 'more', 'likely', 'to', 'harbor', 'smbhs', 'with', 'low', 'lambda_rmedd', 'to', 'gain', 'a', 'better', 'understanding', 'on', 'the', 'accretion', 'activities', 'in', 'quasars', 'in', 'the', 'early', 'universe', 'we', 'obtained', 'a', 'deep', 'nearinfrared', 'nir', 'spectrum', 'of', 'a', 'quasar', 'ims', 'j220417920111448', 'hereafter', 'ims', 'j22040112', 'one', 'of', 'the', 'faintest', 'quasars', 'that', 'have', 'been', 'identified', 'at', 'zsim6', 'from', 'the', 'redshifted', 'c', 'iv', 'lambda', '1549', 'emission', 'line', 'in', 'the', 'nir', 'spectrum', 'we', 'find', 'that', 'ims', 'j22040112', 'harbors', 'a', 'smbh', 'with', 'about', 'a', 'billion', 'solar', 'mass', 'and', 'lambda_rmedd', 'sim', '01', 'but', 'with', 'a', 'large', 'uncertainty', 'in', 'both', 'quantities', '041', 'dex', 'ims', 'j22040112', 'has', 'one', 'of', 'the', 'lowest', 'eddington', 'ratios', 'among', 'quasars', 'at', 'zsim6', 'but', 'a', 'common', 'value', 'among', 'quasars', 'at', 'zsim2', 'its', 'low', 'lambda_rmedd', 'can', 'be', 'explained', 'with', 'two', 'scenarios', 'the', 'smbh', 'growth', 'from', 'a', 'stellar', 'mass', 'black', 'hole', 'through', 'shortduration', 'supereddington', 'accretion', 'events', 'or', 'from', 'a', 'massive', 'black', 'hole', 'seed', 'sim105m_odot', 'with', 'eddingtonlimited', 'accretion', 'nir', 'spectra', 'of', 'more', 'faint', 'quasars', 'are', 'needed', 'to', 'better', 'understand', 'the', 'accretion', 'activities', 'of', 'smbhs', 'at', 'z', 'sim', '6']] | [-0.02513955740829591, 0.09896947967883368, -0.02873337555951862, 0.14473336831486613, -0.10035111565375701, -0.13995183616643772, 0.03970260502220216, 0.42303048281253064, -0.07805781981071712, -0.33736811864655464, 0.0852548424249769, -0.35752437637737866, 0.028134401904588397, 0.21534626020410624, -0.04580591105834835, -0.042779060457145204, -0.0042115505573085766, -0.09193625494583764, -0.04322292248094031, -0.29959612577433953, 0.26894227296685463, 0.09763217353333443, 0.14953084232349118, -0.058322980234251275, 0.06534317053896799, -0.15313802415674382, -0.05109512458386069, -0.041861873792103405, -0.1332742515564777, 0.018880194375048055, 0.32661138696765357, 0.166181151306426, 0.27500966728072274, -0.30358958822167054, -0.20373224547048183, 0.08325133973108181, 0.2354223510292782, 0.04229489958591082, -0.08539551414128668, -0.2283155495904132, 0.11532885304186494, -0.22827468952693214, -0.13589447785952044, 0.11578236392868513, 0.05479724970646203, 0.0033623471041209995, -0.17907041746022348, 0.16910843164448372, 0.00504798461757177, 0.033897937486075204, -0.09345881653346376, -0.04388214381178841, -0.12381749158852141, 0.035017632429530335, 0.08528039245019582, 0.07369314479239454, 0.22123990130864762, -0.15196078673047436, -0.063796009356156, 0.37801268504805524, -0.046761616848578505, 0.06928861876103011, 0.22673422060430642, -0.30214160638120535, -0.20339759023203938, 0.17942273010055282, 0.1759616512153033, 0.1527032276192172, -0.15102722471929156, -0.022107524294105216, 0.00726904620744542, 0.25005991710667413, 0.031132978584024716, 0.11359286104032601, 0.4311789306938987, 0.11557059475559403, -0.0006773960210425271, 0.02525535079766996, -0.15263501913921737, 0.028144708534025332, -0.17392110426867888, -0.07119160418991338, -0.12180723429615185, 0.1921720263740016, -0.1705584623162312, -0.09253441680180417, 0.3078636748800901, 0.10001200169420124, 0.2631893594601107, 0.04608769934539768, 0.264705524479293, 0.10286223637680947, 0.13425024318434722, 0.16295618169983342, 0.39681698202409527, 0.12827180352919226, 0.13330098188969053, -0.1962178902844078, 0.06873557791008021, 0.0248267451999709] |
1,802.02783 | Saliency-Enhanced Robust Visual Tracking | Discrete correlation filter (DCF) based trackers have shown considerable
success in visual object tracking. These trackers often make use of low to mid
level features such as histogram of gradients (HoG) and mid-layer activations
from convolution neural networks (CNNs). We argue that including semantically
higher level information to the tracked features may provide further robustness
to challenging cases such as viewpoint changes. Deep salient object detection
is one example of such high level features, as it make use of semantic
information to highlight the important regions in the given scene. In this
work, we propose an improvement over DCF based trackers by combining saliency
based and other features based filter responses. This combination is performed
with an adaptive weight on the saliency based filter responses, which is
automatically selected according to the temporal consistency of visual
saliency. We show that our method consistently improves a baseline DCF based
tracker especially in challenging cases and performs superior to the
state-of-the-art. Our improved tracker operates at 9.3 fps, introducing a small
computational burden over the baseline which operates at 11 fps.
| cs.CV | discrete correlation filter dcf based trackers have shown considerable success in visual object tracking these trackers often make use of low to mid level features such as histogram of gradients hog and midlayer activations from convolution neural networks cnns we argue that including semantically higher level information to the tracked features may provide further robustness to challenging cases such as viewpoint changes deep salient object detection is one example of such high level features as it make use of semantic information to highlight the important regions in the given scene in this work we propose an improvement over dcf based trackers by combining saliency based and other features based filter responses this combination is performed with an adaptive weight on the saliency based filter responses which is automatically selected according to the temporal consistency of visual saliency we show that our method consistently improves a baseline dcf based tracker especially in challenging cases and performs superior to the stateoftheart our improved tracker operates at 93 fps introducing a small computational burden over the baseline which operates at 11 fps | [['discrete', 'correlation', 'filter', 'dcf', 'based', 'trackers', 'have', 'shown', 'considerable', 'success', 'in', 'visual', 'object', 'tracking', 'these', 'trackers', 'often', 'make', 'use', 'of', 'low', 'to', 'mid', 'level', 'features', 'such', 'as', 'histogram', 'of', 'gradients', 'hog', 'and', 'midlayer', 'activations', 'from', 'convolution', 'neural', 'networks', 'cnns', 'we', 'argue', 'that', 'including', 'semantically', 'higher', 'level', 'information', 'to', 'the', 'tracked', 'features', 'may', 'provide', 'further', 'robustness', 'to', 'challenging', 'cases', 'such', 'as', 'viewpoint', 'changes', 'deep', 'salient', 'object', 'detection', 'is', 'one', 'example', 'of', 'such', 'high', 'level', 'features', 'as', 'it', 'make', 'use', 'of', 'semantic', 'information', 'to', 'highlight', 'the', 'important', 'regions', 'in', 'the', 'given', 'scene', 'in', 'this', 'work', 'we', 'propose', 'an', 'improvement', 'over', 'dcf', 'based', 'trackers', 'by', 'combining', 'saliency', 'based', 'and', 'other', 'features', 'based', 'filter', 'responses', 'this', 'combination', 'is', 'performed', 'with', 'an', 'adaptive', 'weight', 'on', 'the', 'saliency', 'based', 'filter', 'responses', 'which', 'is', 'automatically', 'selected', 'according', 'to', 'the', 'temporal', 'consistency', 'of', 'visual', 'saliency', 'we', 'show', 'that', 'our', 'method', 'consistently', 'improves', 'a', 'baseline', 'dcf', 'based', 'tracker', 'especially', 'in', 'challenging', 'cases', 'and', 'performs', 'superior', 'to', 'the', 'stateoftheart', 'our', 'improved', 'tracker', 'operates', 'at', '93', 'fps', 'introducing', 'a', 'small', 'computational', 'burden', 'over', 'the', 'baseline', 'which', 'operates', 'at', '11', 'fps']] | [-0.020871609285169453, -0.03471839929623243, -0.11676764689052904, 0.04135262544134205, -0.0955018146905278, -0.17893830808555947, -0.0031726016525137524, 0.4855910345454123, -0.23352314942313473, -0.3450353287421193, 0.07427255909203151, -0.275314406559454, -0.20698998577362082, 0.1554825324844829, -0.1633008785608261, 0.09699411851005348, 0.11937584432997017, 0.05435691389802182, -0.09111796908195043, -0.2817627434552434, 0.25152862976648577, 0.12332953997694512, 0.3547323109040963, 0.021082303224017, 0.1871784324991886, -0.010245425813615467, -0.08126682006134833, 0.01124063786324494, -0.006117837522169133, 0.15343801251339614, 0.3201209193813568, 0.15778718525465765, 0.31477455954020583, -0.3887465977520999, -0.23397586217238542, 0.02271966025748358, 0.13346371785789604, 0.05778639575182955, -0.03392977112001484, -0.3657731537462613, 0.10156327125931149, -0.16581994224360536, 0.021927513501980193, -0.12692125120288666, -0.021930710680512243, 0.011648433142492557, -0.28100119485889236, 0.05515052989195491, 0.049034825493740934, 0.08407393665385937, -0.005730633772181233, -0.14467817851128942, 0.007479689031964241, 0.16816650874725433, 0.00618142433407295, 0.06890893034040589, 0.1814185399536106, -0.21674859874189817, -0.13892063520641934, 0.335365137025485, -0.11175432069586101, -0.21720462923937128, 0.23611165977254842, -0.04921238308683995, -0.14886898298971563, 0.14048498193343176, 0.18804407024277406, 0.12613887653826586, -0.12503337649389185, -0.054557563793779136, -0.026640751862159653, 0.22255502498315846, 0.057419738864952795, 0.07612345009871795, 0.19606713193869374, 0.2691879675427046, 0.06036827695301042, 0.12888208818888583, -0.2140982032320384, -0.052136018148404885, -0.2158594359721801, -0.07522831149042393, -0.1606972794901767, -0.08508312419400285, -0.10117913006036477, -0.1352701558679142, 0.41674578855303246, 0.2885113116334239, 0.2427230919073934, 0.09775354368378039, 0.3505494511119147, 0.055387471736845814, 0.15614591032190525, 0.09479390077199266, 0.2137222642510838, -0.025728260774383914, 0.1184587853338944, -0.15102993551311317, 0.06956729417951002, 0.07968223004149241] |
1,802.02784 | Acoustic Analogues of High-Index Optical Waveguide Devices | High index optical waveguide devices such as slab waveguides, strip
waveguides and fibers play extremely important roles in a wide range of modern
applications including telecommunications, sensing, lasing, interferometry, and
resonant amplification. Yet, transposing these advantageous applications from
optics to acoustics remains a fundamental practical challenge, since most
materials exhibit refractive indices lower than that of air for sound waves.
Here, we demonstrate the relevance of acoustic metamaterials for tackling this
pivotal problem. More specifically, we consider a metamaterial built from
subwavelength air-filled acoustic pipes engineered to effectively exhibit a
higher refractive index than homogenous air. We show that such medium can be
employed to realize acoustic equivalents of dielectric slab or strip
waveguides, and optical fibers. Unlike conventional acoustic pipes, our guiding
approach allows the waveguide to remain open to the external medium, which
opens a plethora of new opportunities in noise management, medical imaging,
underwater communication systems, and sensing.
| physics.app-ph | high index optical waveguide devices such as slab waveguides strip waveguides and fibers play extremely important roles in a wide range of modern applications including telecommunications sensing lasing interferometry and resonant amplification yet transposing these advantageous applications from optics to acoustics remains a fundamental practical challenge since most materials exhibit refractive indices lower than that of air for sound waves here we demonstrate the relevance of acoustic metamaterials for tackling this pivotal problem more specifically we consider a metamaterial built from subwavelength airfilled acoustic pipes engineered to effectively exhibit a higher refractive index than homogenous air we show that such medium can be employed to realize acoustic equivalents of dielectric slab or strip waveguides and optical fibers unlike conventional acoustic pipes our guiding approach allows the waveguide to remain open to the external medium which opens a plethora of new opportunities in noise management medical imaging underwater communication systems and sensing | [['high', 'index', 'optical', 'waveguide', 'devices', 'such', 'as', 'slab', 'waveguides', 'strip', 'waveguides', 'and', 'fibers', 'play', 'extremely', 'important', 'roles', 'in', 'a', 'wide', 'range', 'of', 'modern', 'applications', 'including', 'telecommunications', 'sensing', 'lasing', 'interferometry', 'and', 'resonant', 'amplification', 'yet', 'transposing', 'these', 'advantageous', 'applications', 'from', 'optics', 'to', 'acoustics', 'remains', 'a', 'fundamental', 'practical', 'challenge', 'since', 'most', 'materials', 'exhibit', 'refractive', 'indices', 'lower', 'than', 'that', 'of', 'air', 'for', 'sound', 'waves', 'here', 'we', 'demonstrate', 'the', 'relevance', 'of', 'acoustic', 'metamaterials', 'for', 'tackling', 'this', 'pivotal', 'problem', 'more', 'specifically', 'we', 'consider', 'a', 'metamaterial', 'built', 'from', 'subwavelength', 'airfilled', 'acoustic', 'pipes', 'engineered', 'to', 'effectively', 'exhibit', 'a', 'higher', 'refractive', 'index', 'than', 'homogenous', 'air', 'we', 'show', 'that', 'such', 'medium', 'can', 'be', 'employed', 'to', 'realize', 'acoustic', 'equivalents', 'of', 'dielectric', 'slab', 'or', 'strip', 'waveguides', 'and', 'optical', 'fibers', 'unlike', 'conventional', 'acoustic', 'pipes', 'our', 'guiding', 'approach', 'allows', 'the', 'waveguide', 'to', 'remain', 'open', 'to', 'the', 'external', 'medium', 'which', 'opens', 'a', 'plethora', 'of', 'new', 'opportunities', 'in', 'noise', 'management', 'medical', 'imaging', 'underwater', 'communication', 'systems', 'and', 'sensing']] | [-0.13181473875945643, 0.17390412108553266, -0.007738553832550317, -0.015119220776983, -0.12856694415214762, -0.20637088896558675, -0.009002155958927723, 0.511301048420715, -0.25079531309315134, -0.2932944938614471, 0.11109121439790366, -0.27687364248784385, -0.22393568045697143, 0.30567488713700336, -0.057366911207776, 0.13605757402826643, 0.01497311413053744, -0.0921130748388561, 0.031046941626619622, -0.09239293310701822, 0.24109293592150094, 0.028484426028656445, 0.3879699204024544, 0.05803545978882455, 0.08886513316179688, 0.02854896471750867, 0.022360648901281966, -0.010215162712809266, -0.07875566237456927, 0.15902841624276504, 0.3570526819799515, -0.00012613917448070665, 0.283604569606705, -0.4714463832263915, -0.338056746241174, 0.06626800148106421, 0.19165235256779298, 0.1362484227702105, -0.11909835727699178, -0.2546228818866788, 0.027081807176366646, -0.1298515733596653, -0.15290855405386153, -0.036857820708082606, -0.02807133812580677, -0.027338045174317645, -0.19462021200189872, -0.009319614962673136, 0.023133227401197155, 0.05564573702181918, -0.03699505251968381, -0.06916579584258035, 0.05485763951414419, 0.09997153354250511, -0.0705773006293565, -0.0750627698699037, 0.18403661664920729, -0.1687860438979496, -0.0803765836148677, 0.45022367115289785, -0.05261534195423584, -0.13675208009212025, 0.2029588397697157, -0.10074176817564973, 0.006609089940860374, 0.13291276441208574, 0.27506264780851586, 0.05550182324877342, -0.10847375386884893, -0.005576262904318753, 0.008589166287480798, 0.21626817400101572, 0.19520423581071247, 0.14904583861977355, 0.2375356988450944, 0.23307120264662023, 0.061628814243915066, 0.14983204138135253, -0.0618666649953345, 0.04576957163505799, -0.20948126661091648, -0.1654025148908725, -0.16500186083826007, 0.027039150513333905, -0.10568557305543665, -0.22539258086190417, 0.35808428652917607, 0.18738204466074163, 0.07761999585400552, -0.049593624332765526, 0.32813357113743363, 0.07188864964035814, 0.1059292634295312, 0.05171393529999237, 0.30691773381503606, 0.17575781151578324, 0.17220332399349883, -0.17045868478024637, -0.05060518015213064, -0.05211266284709833] |
1,802.02785 | Boardman's whole-plane obstruction group for Cartan-Eilenberg systems | Each extended Cartan--Eilenberg system $(H, \partial)$ gives rise to two
exact couples and one spectral sequence. We show that the canonical colim-lim
interchange morphism associated to $H$ is a surjection, and that its kernel is
isomorphic to Boardman's whole-plane obstruction group $W$, for each of the two
exact couples.
| math.AT | each extended cartaneilenberg system h partial gives rise to two exact couples and one spectral sequence we show that the canonical colimlim interchange morphism associated to h is a surjection and that its kernel is isomorphic to boardmans wholeplane obstruction group w for each of the two exact couples | [['each', 'extended', 'cartaneilenberg', 'system', 'h', 'partial', 'gives', 'rise', 'to', 'two', 'exact', 'couples', 'and', 'one', 'spectral', 'sequence', 'we', 'show', 'that', 'the', 'canonical', 'colimlim', 'interchange', 'morphism', 'associated', 'to', 'h', 'is', 'a', 'surjection', 'and', 'that', 'its', 'kernel', 'is', 'isomorphic', 'to', 'boardmans', 'wholeplane', 'obstruction', 'group', 'w', 'for', 'each', 'of', 'the', 'two', 'exact', 'couples']] | [-0.1757910300759559, 0.09562552934314342, -0.09427478909492493, 0.09202355322888756, -0.15262176722605178, -0.22294222712120476, -0.03803582065689199, 0.396558709046308, -0.37881570555111194, -0.2035492054642515, 0.05361694086620465, -0.28090878591892565, -0.10658228405295535, 0.1276087118709024, -0.05780278885380385, -0.0714366214951758, 0.08691225713118911, 0.13525802267101059, -0.06076381826139194, -0.18458389583975077, 0.3546989956236583, -0.06256782009880593, 0.22646597260113885, -0.0037781576368402926, 0.17608102494256295, -0.03398034118730178, -0.03895130236335891, -0.050554896036083714, -0.15027268543162017, 0.07707503886814131, 0.20224995368180124, 0.08706291364704041, 0.22653487293257754, -0.322382122357475, -0.08154429162436343, 0.17637827395996514, 0.1337709411423891, 0.003204316217848595, 0.018465857398002706, -0.21152127867049358, 0.11316464251332094, -0.1696999916048879, -0.11564967758517633, -0.041944841656120536, 0.0428628442769355, -0.03623924130187469, -0.31609262664742926, 0.007787774009828238, 0.11739770655936384, -0.031955905650009185, -0.05184669178623231, -0.04543643763556363, -0.1382066879342211, 0.10713276717851454, -0.012819930603925852, 0.11685738367761703, 0.08679041273376727, -0.06087038794438295, -0.09643344741631696, 0.37368142898095413, -0.1284882609702726, -0.20100267649568776, 0.19320318075095086, -0.10466231683150251, -0.16397041716474167, 0.20321970870916514, 0.020519961543539737, 0.09164391299511523, -0.047255411664856244, 0.1756137041944733, -0.09180169699198389, 0.10462378366711608, 0.05479689525004397, -0.01116636084353036, 0.1133526519654279, 0.04339257288882707, 0.12715325886978113, 0.18117538296637384, -0.007975109636119785, -0.08038474349899495, -0.3504302587280882, -0.22928035072239233, -0.12545797904517422, 0.10803356358504042, -0.08305946371686507, -0.15810322024403733, 0.41271722641714076, 0.10370476025731322, 0.2225070585833585, 0.04288637311138371, 0.19090950307733517, 0.11758405723153277, 0.031178338720681185, 0.03819411358934768, 0.1033928598812286, 0.24749582890975982, -0.03596035518406078, -0.22456381543281864, -0.04028671049572369, 0.2068510871142783] |
1,802.02786 | The MRI imprint on the Short-GRB Jets | Short gamma ray bursts are presumably results of binary neutron star mergers,
which lead to the formation of a stellar mass black hole, surrounded by a
remnant matter. The strong magnetic fields help collimate jets of plasma,
launched along the axis of the black hole rotation. We study the structure and
evolution of the accreting plasma in the short GRBs and we model the formation
of the base of a relativistic, Poynting-dominated jets. Our numerical models
are based on the general relativistic MHD, axisymmetric simulations. We discuss
the origin of variability in the GRB jet emission, which timescales are related
to the action of the magneto-rotational instability in the accreting plasma. We
also estimate the value of a maximum achievable Lorentz factor in the jets
produced by our simulations, and reached at the large distances, where the
gamma ray emission is produced.
| astro-ph.HE | short gamma ray bursts are presumably results of binary neutron star mergers which lead to the formation of a stellar mass black hole surrounded by a remnant matter the strong magnetic fields help collimate jets of plasma launched along the axis of the black hole rotation we study the structure and evolution of the accreting plasma in the short grbs and we model the formation of the base of a relativistic poyntingdominated jets our numerical models are based on the general relativistic mhd axisymmetric simulations we discuss the origin of variability in the grb jet emission which timescales are related to the action of the magnetorotational instability in the accreting plasma we also estimate the value of a maximum achievable lorentz factor in the jets produced by our simulations and reached at the large distances where the gamma ray emission is produced | [['short', 'gamma', 'ray', 'bursts', 'are', 'presumably', 'results', 'of', 'binary', 'neutron', 'star', 'mergers', 'which', 'lead', 'to', 'the', 'formation', 'of', 'a', 'stellar', 'mass', 'black', 'hole', 'surrounded', 'by', 'a', 'remnant', 'matter', 'the', 'strong', 'magnetic', 'fields', 'help', 'collimate', 'jets', 'of', 'plasma', 'launched', 'along', 'the', 'axis', 'of', 'the', 'black', 'hole', 'rotation', 'we', 'study', 'the', 'structure', 'and', 'evolution', 'of', 'the', 'accreting', 'plasma', 'in', 'the', 'short', 'grbs', 'and', 'we', 'model', 'the', 'formation', 'of', 'the', 'base', 'of', 'a', 'relativistic', 'poyntingdominated', 'jets', 'our', 'numerical', 'models', 'are', 'based', 'on', 'the', 'general', 'relativistic', 'mhd', 'axisymmetric', 'simulations', 'we', 'discuss', 'the', 'origin', 'of', 'variability', 'in', 'the', 'grb', 'jet', 'emission', 'which', 'timescales', 'are', 'related', 'to', 'the', 'action', 'of', 'the', 'magnetorotational', 'instability', 'in', 'the', 'accreting', 'plasma', 'we', 'also', 'estimate', 'the', 'value', 'of', 'a', 'maximum', 'achievable', 'lorentz', 'factor', 'in', 'the', 'jets', 'produced', 'by', 'our', 'simulations', 'and', 'reached', 'at', 'the', 'large', 'distances', 'where', 'the', 'gamma', 'ray', 'emission', 'is', 'produced']] | [-0.14057310368098372, 0.17875733876823854, -0.06829598954957451, 0.15459772363111612, -0.0941427379525201, -0.03219632295281692, -0.014582828300493494, 0.3768134930328479, -0.20893349242068723, -0.29245577133457423, 0.050191333533828736, -0.27253189950551787, 0.01801616850130352, 0.23822072631528626, 0.037069162393224914, -0.006682107025022868, 0.07661010012109305, -0.05016150029415501, -0.07388196449766171, -0.18671171622380325, 0.35042826877742955, 0.1511842307755986, 0.16320432327965662, 0.006143683003602733, 0.07356176802209696, -0.09176712837660501, -0.035204294914851934, -0.0007406602495572936, -0.14871732188762957, 0.03563611654722145, 0.16279175077536012, 0.10427602527140063, 0.19024446560981975, -0.43615979938702265, -0.2592333458088548, 0.019053301242717976, 0.14270202597049, 0.06022638807722538, -0.11145401374243435, -0.24169980645471606, 0.06954594535267794, -0.24287285759526922, -0.16504805452439567, 0.07899716538442693, 0.014438889112362874, 0.07164308034100006, -0.24861914616506087, 0.12519545401721163, 0.07989805823349407, -0.012711206172317477, -0.10243092687074161, 0.014478874649413087, -0.045112414167485605, 0.0432575420119052, 0.16120056526384538, 0.09589686406559875, 0.20865391874948228, -0.16335073382672394, -0.10440887538978541, 0.41792943562105506, -0.03758402991200417, -0.07278505697334842, 0.21876459703682333, -0.28643774998072585, -0.14414295325593524, 0.20018766605308358, 0.21794865950023834, 0.1686592142796144, -0.10462658992570065, -0.012989132063755189, -0.028655835947113663, 0.13292248817455862, 0.05330702500962193, 0.013825635860664246, 0.3586489448559956, 0.16162436435484445, -0.06243787830183938, 0.11265365493936386, -0.1960042673507443, -0.024490024153353045, -0.3090204821840506, -0.08887359011314915, -0.13462450111966948, 0.12485308411472122, -0.12454904193145921, -0.14326279879298429, 0.3834075949377787, 0.09330813088585478, 0.16660954894065122, -0.036933902521539004, 0.2719630439647696, 0.08197584337207266, 0.026652583999979034, 0.19974744070360673, 0.3563335766740353, 0.19768752831585285, 0.09502003998757982, -0.29532967725912973, 0.045163036232416985, 0.06587669586526676] |
1,802.02787 | Determination of the He-He, Ne-Ne, Ar-Ar, and H$_{2}$ interaction
potential by wave function imaging | We report on a direct method to measure the internuclear potential energy
curve of diatomic systems. A COLTRIMS reaction microscope was used to measure
the squares of the vibrational wave functions of H$_{2}$, He$_{2}$, Ne$_{2}$,
and Ar$_{2}$. The Schr\"odinger equation relates the curvature of the wave
function to the potential V(R) and therefore offers a simple but elegant way to
extract the shape of the potential.
| physics.atom-ph | we report on a direct method to measure the internuclear potential energy curve of diatomic systems a coltrims reaction microscope was used to measure the squares of the vibrational wave functions of h_2 he_2 ne_2 and ar_2 the schrodinger equation relates the curvature of the wave function to the potential vr and therefore offers a simple but elegant way to extract the shape of the potential | [['we', 'report', 'on', 'a', 'direct', 'method', 'to', 'measure', 'the', 'internuclear', 'potential', 'energy', 'curve', 'of', 'diatomic', 'systems', 'a', 'coltrims', 'reaction', 'microscope', 'was', 'used', 'to', 'measure', 'the', 'squares', 'of', 'the', 'vibrational', 'wave', 'functions', 'of', 'h_2', 'he_2', 'ne_2', 'and', 'ar_2', 'the', 'schrodinger', 'equation', 'relates', 'the', 'curvature', 'of', 'the', 'wave', 'function', 'to', 'the', 'potential', 'vr', 'and', 'therefore', 'offers', 'a', 'simple', 'but', 'elegant', 'way', 'to', 'extract', 'the', 'shape', 'of', 'the', 'potential']] | [-0.1041769256187377, 0.02689368524729754, -0.15679691799353654, 0.06202776025924267, -0.052179218410994065, -0.11983648791316558, 0.04612384259587887, 0.37951001273750357, -0.25831587221755675, -0.23688035029353519, -0.01863077609574027, -0.29591814096960606, -0.13528301282503613, 0.18854658061525587, 0.037961550071045305, 0.1063824770725191, 0.018655062533181273, 0.023676626087928362, -0.04360600694957556, -0.15059653544184667, 0.30345117608367494, 0.06425932763765256, 0.21749295947621716, 0.15968531274208517, 0.14453836495875183, 0.009423877137261585, 0.03480546844410569, -0.07154612220597989, -0.1751832667540646, 0.16775613319777855, 0.16143645164133472, 0.10830785439236823, 0.24057000502943993, -0.41091599654067645, -0.21357203169133177, 0.10838980559316097, 0.12021838249920895, 0.14444903670245726, -0.04214407974381395, -0.27707286026667466, -0.018220006728149725, -0.14021276104066407, -0.21274162020364945, -0.09159318859703049, 0.06499014939463725, 0.09143816176308037, -0.2542992480748305, 0.09856567447158424, -0.034191603320791866, 0.022329006061861008, -0.11489289975372341, -0.1148429666857489, -0.03520577308496065, 0.05913979627869346, 0.0007255457228783405, 0.0978818692669985, 0.1400019591321435, -0.0938122908577718, -0.04222442024161644, 0.43342155640041735, -0.11173882125171297, -0.17961442074032896, 0.17389589614432419, -0.1447523347045662, -0.02462321696238536, 0.15487487839929986, 0.15614920829168774, 0.12465857543848512, -0.17233509904789654, 0.05348213776685015, 0.0352911767130894, 0.16903812822067377, 0.08470425073226745, 0.029394211656780855, 0.15571581360630013, 0.10946521216961132, 0.08161622577939522, 0.13320641151883386, -0.12724892372815785, -0.0519486769864505, -0.2444604355277437, -0.21148072468173323, -0.2057661157891606, 0.06258977938110051, -0.035214201974943564, -0.17813224551465476, 0.43735511059110815, 0.0582441838853287, 0.1761877295758688, 0.007195498790789508, 0.2923733071903839, 0.16737850213592703, 0.05881505096542903, -0.05244519990501982, 0.2358170922309386, 0.19944649150552737, 0.09449479946951297, -0.2897668487081925, -0.0017708236930158102, 0.06441907528223413] |
1,802.02788 | Action Anticipation: Reading the Intentions of Humans and Robots | Humans have the fascinating capacity of processing non-verbal visual cues to
understand and anticipate the actions of other humans. This "intention reading"
ability is underpinned by shared motor-repertoires and action-models, which we
use to interpret the intentions of others as if they were our own.
We investigate how the different cues contribute to the legibility of human
actions during interpersonal interactions. Our first contribution is a publicly
available dataset with recordings of human body-motion and eye-gaze, acquired
in an experimental scenario with an actor interacting with three subjects. From
these data, we conducted a human study to analyse the importance of the
different non-verbal cues for action perception. As our second contribution, we
used the motion/gaze recordings to build a computational model describing the
interaction between two persons. As a third contribution, we embedded this
model in the controller of an iCub humanoid robot and conducted a second human
study, in the same scenario with the robot as an actor, to validate the model's
"intention reading" capability.
Our results show that it is possible to model (non-verbal) signals exchanged
by humans during interaction, and how to incorporate such a mechanism in
robotic systems with the twin goal of : (i) being able to "read" human action
intentions, and (ii) acting in a way that is legible by humans.
| cs.RO | humans have the fascinating capacity of processing nonverbal visual cues to understand and anticipate the actions of other humans this intention reading ability is underpinned by shared motorrepertoires and actionmodels which we use to interpret the intentions of others as if they were our own we investigate how the different cues contribute to the legibility of human actions during interpersonal interactions our first contribution is a publicly available dataset with recordings of human bodymotion and eyegaze acquired in an experimental scenario with an actor interacting with three subjects from these data we conducted a human study to analyse the importance of the different nonverbal cues for action perception as our second contribution we used the motiongaze recordings to build a computational model describing the interaction between two persons as a third contribution we embedded this model in the controller of an icub humanoid robot and conducted a second human study in the same scenario with the robot as an actor to validate the models intention reading capability our results show that it is possible to model nonverbal signals exchanged by humans during interaction and how to incorporate such a mechanism in robotic systems with the twin goal of i being able to read human action intentions and ii acting in a way that is legible by humans | [['humans', 'have', 'the', 'fascinating', 'capacity', 'of', 'processing', 'nonverbal', 'visual', 'cues', 'to', 'understand', 'and', 'anticipate', 'the', 'actions', 'of', 'other', 'humans', 'this', 'intention', 'reading', 'ability', 'is', 'underpinned', 'by', 'shared', 'motorrepertoires', 'and', 'actionmodels', 'which', 'we', 'use', 'to', 'interpret', 'the', 'intentions', 'of', 'others', 'as', 'if', 'they', 'were', 'our', 'own', 'we', 'investigate', 'how', 'the', 'different', 'cues', 'contribute', 'to', 'the', 'legibility', 'of', 'human', 'actions', 'during', 'interpersonal', 'interactions', 'our', 'first', 'contribution', 'is', 'a', 'publicly', 'available', 'dataset', 'with', 'recordings', 'of', 'human', 'bodymotion', 'and', 'eyegaze', 'acquired', 'in', 'an', 'experimental', 'scenario', 'with', 'an', 'actor', 'interacting', 'with', 'three', 'subjects', 'from', 'these', 'data', 'we', 'conducted', 'a', 'human', 'study', 'to', 'analyse', 'the', 'importance', 'of', 'the', 'different', 'nonverbal', 'cues', 'for', 'action', 'perception', 'as', 'our', 'second', 'contribution', 'we', 'used', 'the', 'motiongaze', 'recordings', 'to', 'build', 'a', 'computational', 'model', 'describing', 'the', 'interaction', 'between', 'two', 'persons', 'as', 'a', 'third', 'contribution', 'we', 'embedded', 'this', 'model', 'in', 'the', 'controller', 'of', 'an', 'icub', 'humanoid', 'robot', 'and', 'conducted', 'a', 'second', 'human', 'study', 'in', 'the', 'same', 'scenario', 'with', 'the', 'robot', 'as', 'an', 'actor', 'to', 'validate', 'the', 'models', 'intention', 'reading', 'capability', 'our', 'results', 'show', 'that', 'it', 'is', 'possible', 'to', 'model', 'nonverbal', 'signals', 'exchanged', 'by', 'humans', 'during', 'interaction', 'and', 'how', 'to', 'incorporate', 'such', 'a', 'mechanism', 'in', 'robotic', 'systems', 'with', 'the', 'twin', 'goal', 'of', 'i', 'being', 'able', 'to', 'read', 'human', 'action', 'intentions', 'and', 'ii', 'acting', 'in', 'a', 'way', 'that', 'is', 'legible', 'by', 'humans']] | [-0.06703277772616052, 0.0860585944353769, -0.09363805513502156, 0.03606591626079184, -0.15435455051281363, -0.15412409477014566, 0.03745475830728879, 0.43062734373018774, -0.25026343006885526, -0.36204273657908254, 0.05202573161089067, -0.31554765806931284, -0.24220844001308117, 0.1606047051672347, -0.14896012497453692, -0.005159043164775125, 0.0858320045668059, 0.11063274038527074, 0.0563035752962315, -0.25585498878548685, 0.27041601907804025, 0.041640332173075126, 0.25180515163564976, 0.027334448157814047, 0.12235966076508181, -0.012584521659287, -0.04420076749651548, -0.04870208654062989, -0.05795332435727559, 0.16762776686722508, 0.30729743058404446, 0.173247821226786, 0.31093412557804845, -0.46040052789407715, -0.18203609461017267, 0.06765324222344792, 0.1051055266748143, 0.0910183357991969, -0.025589492187306214, -0.4060953841085585, 0.0667589701610473, -0.19333056457331974, -0.0668148521034423, -0.07900473508795837, 0.018624761758345952, -0.030865774463704775, -0.24409419741096772, -0.011369807540194215, 0.056693956279961016, 0.11826782159771258, -0.09693192899283984, -0.022096380886529952, -0.006023158316015148, 0.3036633632386304, 0.0794049990740539, 0.02722410507092445, 0.17270631889458482, -0.19835840885422495, -0.16999623865684924, 0.3958636308351243, -0.03798252008685912, -0.21343572783183323, 0.25641976256456944, -0.09638514591735119, -0.11209680482377889, 0.027582307161431008, 0.225210782415955, 0.09279981872040621, -0.203076560102718, -0.03631904853252091, -0.019983064781157342, 0.19021227111342526, 0.0052778001638575335, -0.029035805814195546, 0.20322719652275664, 0.2127798635227291, -0.027558703520969258, 0.13134791699811726, -0.06289900336502023, -0.07821723872149677, -0.2667475922441464, -0.12779053964569045, -0.14890348655444968, -0.020100123832710613, -0.03833769216213677, -0.05712506653819705, 0.37532224255163626, 0.26241680900588144, 0.1898371923120229, 0.08107490196333271, 0.3418558436848153, -0.01778360646072679, 0.09531611540604015, 0.020799059708309774, 0.20184193871819148, -0.00173206278450892, 0.1367906395612643, -0.24387827288810854, 0.0929732828055609, -0.008157008354871275] |
1,802.02789 | Exploiting Spin-Orbit Torque Devices as Reconfigurable Logic for Circuit
Obfuscation | Circuit obfuscation is a frequently used approach to conceal logic
functionalities in order to prevent reverse engineering attacks on fabricated
chips. Efficient obfuscation implementations are expected with lower design
complexity and overhead but higher attack difficulties. In this paper, an
emerging obfuscation approach is proposed by leveraging spinorbit torque (SOT)
devices based look-up-tables (LUTs) as reconfigurable logic to replace the
carefully selected gates. It is essentially impossible to identify the
obfuscated gate with SOTs inside according to the physical geometry
characteristics because the configured functionalities are represented by
magnetization states. Such an obfuscation approach makes the circuit security
further improved with high exponential attack complexities. Experiments on MCNC
and ISCAS 85/89 benchmark suits show that the proposed approach could reduce
the area overheads due to obfuscation by 10% averagely.
| cs.ET cs.CR | circuit obfuscation is a frequently used approach to conceal logic functionalities in order to prevent reverse engineering attacks on fabricated chips efficient obfuscation implementations are expected with lower design complexity and overhead but higher attack difficulties in this paper an emerging obfuscation approach is proposed by leveraging spinorbit torque sot devices based lookuptables luts as reconfigurable logic to replace the carefully selected gates it is essentially impossible to identify the obfuscated gate with sots inside according to the physical geometry characteristics because the configured functionalities are represented by magnetization states such an obfuscation approach makes the circuit security further improved with high exponential attack complexities experiments on mcnc and iscas 8589 benchmark suits show that the proposed approach could reduce the area overheads due to obfuscation by 10 averagely | [['circuit', 'obfuscation', 'is', 'a', 'frequently', 'used', 'approach', 'to', 'conceal', 'logic', 'functionalities', 'in', 'order', 'to', 'prevent', 'reverse', 'engineering', 'attacks', 'on', 'fabricated', 'chips', 'efficient', 'obfuscation', 'implementations', 'are', 'expected', 'with', 'lower', 'design', 'complexity', 'and', 'overhead', 'but', 'higher', 'attack', 'difficulties', 'in', 'this', 'paper', 'an', 'emerging', 'obfuscation', 'approach', 'is', 'proposed', 'by', 'leveraging', 'spinorbit', 'torque', 'sot', 'devices', 'based', 'lookuptables', 'luts', 'as', 'reconfigurable', 'logic', 'to', 'replace', 'the', 'carefully', 'selected', 'gates', 'it', 'is', 'essentially', 'impossible', 'to', 'identify', 'the', 'obfuscated', 'gate', 'with', 'sots', 'inside', 'according', 'to', 'the', 'physical', 'geometry', 'characteristics', 'because', 'the', 'configured', 'functionalities', 'are', 'represented', 'by', 'magnetization', 'states', 'such', 'an', 'obfuscation', 'approach', 'makes', 'the', 'circuit', 'security', 'further', 'improved', 'with', 'high', 'exponential', 'attack', 'complexities', 'experiments', 'on', 'mcnc', 'and', 'iscas', '8589', 'benchmark', 'suits', 'show', 'that', 'the', 'proposed', 'approach', 'could', 'reduce', 'the', 'area', 'overheads', 'due', 'to', 'obfuscation', 'by', '10', 'averagely']] | [-0.1403052822806785, 0.022994221404815107, -0.008111588644169387, 0.06257124157127691, -0.11844859047414502, -0.26571977622734266, 0.10294348559273203, 0.3952857557560492, -0.2662251062647556, -0.3899202605243772, 0.09092246332238574, -0.24950494160293601, -0.1733338224439649, 0.2622522485544323, -0.16993826812540647, 0.11945091708912514, -0.01977386818271043, -0.08239275246160105, -0.035450346501392005, -0.28419955545905395, 0.24435409736906877, 0.08809914515950368, 0.3618893428320007, 0.03876214669799083, 0.04965293067289167, -0.062312995392858284, 0.04278298475583142, -0.014060886493609814, -0.030943845348076593, 0.12068843771294269, 0.32586388978870673, 0.14955611010373104, 0.26563892132253386, -0.48170696625311393, -0.15167958060146702, -0.010793402823765064, 0.12202400790192769, 0.14289519866360934, -0.061660925731302996, -0.31285927046701545, 0.13154754540300928, -0.2061467342555261, -0.08456981666847696, -0.13023166453058366, -0.010155618714634329, -0.025884919308737153, -0.21332219391842955, -0.09179566212151258, 0.05518061156999465, 0.04898005645736703, 0.03453709849088682, -0.07937901042532758, 0.0011378508279449306, 0.07653310071145825, -0.027320056032294815, 0.010738819129073818, 0.2402331108587532, -0.07270262294332497, -0.21843606203401578, 0.3180552943376824, 0.024197043730055157, -0.20491963736822072, 0.15542349111456133, -0.006978133751545101, -0.09503978619613918, 0.1261932885117858, 0.1910921267381127, 0.06711274607187079, -0.15117829228256596, 0.05260893938338995, 0.07854842894448666, 0.2469574675342301, 0.09265519016116741, 0.09629196613423119, 0.15014340927518788, 0.18928733797997666, 0.07705150790206972, 0.19440441161714261, -0.06453821442482877, -0.06027997783439787, -0.20530289082671516, -0.1299665225069475, -0.20290561230285675, 0.03152670010967995, -0.02772597084526751, -0.1421646131275338, 0.33599990673246793, 0.2554175461627892, 0.10669743923062924, 0.0596370887287776, 0.4362755155743798, 0.06351715959362991, 0.1901052001703647, 0.11967267443395713, 0.19816081141470931, 0.06977512948469666, 0.11635752501933894, -0.22796815676338156, 0.18277069771784227, -0.003294107471447205] |
1,802.0279 | Book reviews in academic journals: patterns and dynamics | Book reviews play important roles in scholarly communication especially in
arts and humanities disciplines. By using Web of Science's Science Citation
Index Expanded, Social Sciences Citation Index, and Arts & Humanities Citation
Index, this study probed the patterns and dynamics of book reviews within these
three indexes empirically during the past decade (2006-2015). We found that the
absolute numbers of book reviews among all the three indexes were relatively
stable but the relative shares were decreasing. Book reviews were very common
in arts and humanities, common in social sciences, but rare in natural
sciences. Book reviews are mainly contributed by authors from developed
economies such as the USA and the UK. Oppositely, scholars from China and Japan
are unlikely to contribute to book reviews.
| cs.DL | book reviews play important roles in scholarly communication especially in arts and humanities disciplines by using web of sciences science citation index expanded social sciences citation index and arts humanities citation index this study probed the patterns and dynamics of book reviews within these three indexes empirically during the past decade 20062015 we found that the absolute numbers of book reviews among all the three indexes were relatively stable but the relative shares were decreasing book reviews were very common in arts and humanities common in social sciences but rare in natural sciences book reviews are mainly contributed by authors from developed economies such as the usa and the uk oppositely scholars from china and japan are unlikely to contribute to book reviews | [['book', 'reviews', 'play', 'important', 'roles', 'in', 'scholarly', 'communication', 'especially', 'in', 'arts', 'and', 'humanities', 'disciplines', 'by', 'using', 'web', 'of', 'sciences', 'science', 'citation', 'index', 'expanded', 'social', 'sciences', 'citation', 'index', 'and', 'arts', 'humanities', 'citation', 'index', 'this', 'study', 'probed', 'the', 'patterns', 'and', 'dynamics', 'of', 'book', 'reviews', 'within', 'these', 'three', 'indexes', 'empirically', 'during', 'the', 'past', 'decade', '20062015', 'we', 'found', 'that', 'the', 'absolute', 'numbers', 'of', 'book', 'reviews', 'among', 'all', 'the', 'three', 'indexes', 'were', 'relatively', 'stable', 'but', 'the', 'relative', 'shares', 'were', 'decreasing', 'book', 'reviews', 'were', 'very', 'common', 'in', 'arts', 'and', 'humanities', 'common', 'in', 'social', 'sciences', 'but', 'rare', 'in', 'natural', 'sciences', 'book', 'reviews', 'are', 'mainly', 'contributed', 'by', 'authors', 'from', 'developed', 'economies', 'such', 'as', 'the', 'usa', 'and', 'the', 'uk', 'oppositely', 'scholars', 'from', 'china', 'and', 'japan', 'are', 'unlikely', 'to', 'contribute', 'to', 'book', 'reviews']] | [-0.033102426783946474, 0.13174401036259242, -0.03682437655137382, 0.1266679936079157, -0.13222394586158387, -0.05458739001731714, 0.028486029745639886, 0.3870840762378421, -0.2137957347662953, -0.4135265916763858, 0.07356100862115107, -0.37764048623299695, -0.20076365176800307, 0.21698715475698313, -0.14136091714187304, -0.06071345105282659, 0.07462662594332321, 0.024194986271724953, 0.05844130228572654, -0.3372292395045118, 0.2748052880955421, 0.06242267842777452, 0.4213619156006148, 0.04786008109345207, -0.023204324250459686, -0.04235762936863229, -0.23901417152956128, 0.002892034703759643, -0.14743136353933914, 0.19027780432905245, 0.44203095856062097, 0.23668684021236633, 0.37414889849298366, -0.39124146076600724, -0.1528270028652699, 0.026675821946388702, 0.09167383088752991, -0.021318988435394395, 0.03523975875364935, -0.30173741595259285, 0.0047765335482658775, -0.21909462370553878, -0.05230619274179179, -0.02392005237061682, 0.1170903749809396, 0.04600571641107885, -0.07119334417175714, 0.07194303398799506, -0.006605213004194211, 0.21140654296500655, 0.017497222686973894, -0.2532652922247241, 0.01690012023867509, 0.22489812200116674, 0.16239662543772077, -0.02048411234509109, 0.1687698811633376, -0.17561644006225213, -0.191931448619419, 0.4195733468343572, -0.05331086277549072, -0.02884263690651917, 0.153338618650351, -0.1573496644529022, -0.2059639631921986, 0.028678768261419078, 0.2490504498298212, 0.007152088281766671, -0.16880328945694414, 0.06724729598405188, -0.009881872237031537, 0.16310073565540276, 0.1843958985934988, -0.022425983445643168, 0.21039874951650456, 0.1270008941040927, -0.015903913364859253, 0.06134434032246349, 0.02901152354036647, -0.16153469146607913, -0.14157433433806507, -0.1542265377673737, -0.1521629500855896, 0.03846924073404511, -0.03291076150977401, -0.14518435462945845, 0.40264627904578193, 0.1387563285160416, 0.009595399639167921, -0.10149773868648865, 0.2129521033825065, -0.05488992966730451, 0.016235007563742195, 0.10213791150069697, 0.21326047562562475, 0.046481544207270464, 0.3136978659445677, 0.006507422203364653, 0.11665945268819124, 0.0023225461874853788] |
1,802.02791 | More ZFC inequalities between cardinal invariants | Motivated by recent results and questions of D. Raghavan and S. Shelah, we
present ZFC theorems on the bounding and various almost disjointness numbers,
as well as on reaping and dominating families on uncountable, regular
cardinals. We show that if $\kappa=\lambda^+$ for some $\lambda\geq \omega$ and
$\mathfrak b(\kappa)=\kappa^+$ then $\mathfrak a_e(\kappa)=\mathfrak
a_p(\kappa)=\kappa^+$. If, additionally, $2^{<\lambda}=\lambda$ then $\mathfrak
a_g(\kappa)=\kappa^+$ as well. Furthermore, we prove a variety of new bounds
for $\mathfrak d(\kappa)$ in terms of $\mathfrak r(\kappa)$, including
$\mathfrak d(\kappa)\leq \mathfrak r_\sigma(\kappa)\leq \mathrm{cof}([\mathfrak
r(\kappa)]^\omega)$, and $\mathfrak d(\kappa)\leq \mathfrak r(\kappa)$ whenever
$\mathfrak r(\kappa)<\mathfrak b(\kappa)^{+\kappa}$ or $\mathrm{cof}(\mathfrak
r(\kappa))\leq \kappa$ holds.
| math.LO | motivated by recent results and questions of d raghavan and s shelah we present zfc theorems on the bounding and various almost disjointness numbers as well as on reaping and dominating families on uncountable regular cardinals we show that if kappalambda for some lambdageq omega and mathfrak bkappakappa then mathfrak a_ekappamathfrak a_pkappakappa if additionally 2lambdalambda then mathfrak a_gkappakappa as well furthermore we prove a variety of new bounds for mathfrak dkappa in terms of mathfrak rkappa including mathfrak dkappaleq mathfrak r_sigmakappaleq mathrmcofmathfrak rkappaomega and mathfrak dkappaleq mathfrak rkappa whenever mathfrak rkappamathfrak bkappakappa or mathrmcofmathfrak rkappaleq kappa holds | [['motivated', 'by', 'recent', 'results', 'and', 'questions', 'of', 'd', 'raghavan', 'and', 's', 'shelah', 'we', 'present', 'zfc', 'theorems', 'on', 'the', 'bounding', 'and', 'various', 'almost', 'disjointness', 'numbers', 'as', 'well', 'as', 'on', 'reaping', 'and', 'dominating', 'families', 'on', 'uncountable', 'regular', 'cardinals', 'we', 'show', 'that', 'if', 'kappalambda', 'for', 'some', 'lambdageq', 'omega', 'and', 'mathfrak', 'bkappakappa', 'then', 'mathfrak', 'a_ekappamathfrak', 'a_pkappakappa', 'if', 'additionally', '2lambdalambda', 'then', 'mathfrak', 'a_gkappakappa', 'as', 'well', 'furthermore', 'we', 'prove', 'a', 'variety', 'of', 'new', 'bounds', 'for', 'mathfrak', 'dkappa', 'in', 'terms', 'of', 'mathfrak', 'rkappa', 'including', 'mathfrak', 'dkappaleq', 'mathfrak', 'r_sigmakappaleq', 'mathrmcofmathfrak', 'rkappaomega', 'and', 'mathfrak', 'dkappaleq', 'mathfrak', 'rkappa', 'whenever', 'mathfrak', 'rkappamathfrak', 'bkappakappa', 'or', 'mathrmcofmathfrak', 'rkappaleq', 'kappa', 'holds']] | [-0.15883641566561404, 0.12300114452210796, -0.0024190154576370884, 0.05874554656965788, -0.1219050987883536, -0.18786359551839185, 0.023369180360743994, 0.3183457695359234, -0.2898157093468187, -0.1823016593102799, 0.12277035848481234, -0.2943250195794674, -0.06066179794508444, 0.2543140558842678, -0.16251417824444847, -0.016318844382239635, 0.048441848791404736, 0.13930474856440628, -0.010715405822211747, -0.22711557788953055, 0.3795279033135536, -0.14900705152256197, 0.1919596178976949, 0.09560128490353913, 0.11701203334730031, 0.008858367351295297, 0.06358979405228828, 0.03916151923409035, -0.2725100474744977, 0.027649985694700074, 0.27638494364137567, 0.16180170281129608, 0.26137567629569297, -0.3310762317797039, -0.09039128029199187, 0.23287418722933115, 0.1899170362807507, -0.11531900930716547, 0.013204998026742751, -0.26147492166045444, 0.1697153516308686, -0.17595742019109947, -0.11059836024245204, -0.14836778836108225, 0.1974003475787508, 0.019437080649875624, -0.3364127835388793, 0.008371342574571108, 0.15878166226659315, 0.10468010200447468, -0.08571203343900527, -0.20000749205910537, -0.11654742430965957, -0.020607844436389588, -0.031119739355216194, 0.07881119757955678, 0.039039385288433974, -0.068426878592216, -0.11715845801044515, 0.370888626024257, -0.0649670138197063, -0.19246149268596932, 0.15025003583625304, -0.22620877735100167, -0.20105919644756373, -0.06903658743926086, 0.022740284863556195, 0.17138435952040518, 0.05089535452642067, 0.264788806970437, -0.20161411168898435, 0.0357136323744821, 0.10919128155855592, 0.08621901611602584, 0.05923626684518748, 0.09624155790566705, 0.029788634263325568, 0.0937284981902299, 0.07532558143734498, 0.1202346212988676, -0.36074913980785844, -0.1143362175370025, -0.11773148707525674, 0.17419555590509675, -0.09965440407930061, -0.1536529161195747, 0.3225639540333907, 0.10948172462075342, 0.1812070899448076, 0.17927885499544616, 0.20101512526703436, -0.0019251223244747624, -0.002682961047042248, 0.136703536775353, 0.0776879822129389, 0.20353957731547484, -0.08691835687170889, -0.10966880209094217, -0.025762335312698947, 0.1881434747456508] |
1,802.02792 | Optimized dynamical protection of nonclassical correlation in a quantum
algorithm | A quantum memory interacts with its environment and loses information via
decoherence as well as incoherence. A robust quantum control that prepares,
preserves, and manipulates nonclassical correlations even in the presence of
environmental influence is of paramount importance in quantum information
processing. A well-known technique to suppress decoherence, namely Dynamical
Decoupling (DD), consists of a sequence of rapid flips applied to the system in
order to refocus the system-environment interactions. In this work, we
integrate DD with quantum gates using optimal control techniques to realize
robust quantum gates which offer protection against decoherence. To investigate
the protection of non-classical correlation, we study the evolution of quantum
discord in Grover's search algorithm implemented with dynamically protected
gates. Using a two-qubit NMR system, we experimentally demonstrate a
significant protection against decoherence and incoherence. We find better
performances by phase alternating DD sequences with suitable spacings between
the DD pulses. Interestingly, we also find that DD sequences based on $\pi/2$
pulses perform as well as or even better than those with $\pi$ pulses in
protecting the non-classical correlation. We also support the experimental
results by analyzing the robustness of various DD schemes.
| quant-ph | a quantum memory interacts with its environment and loses information via decoherence as well as incoherence a robust quantum control that prepares preserves and manipulates nonclassical correlations even in the presence of environmental influence is of paramount importance in quantum information processing a wellknown technique to suppress decoherence namely dynamical decoupling dd consists of a sequence of rapid flips applied to the system in order to refocus the systemenvironment interactions in this work we integrate dd with quantum gates using optimal control techniques to realize robust quantum gates which offer protection against decoherence to investigate the protection of nonclassical correlation we study the evolution of quantum discord in grovers search algorithm implemented with dynamically protected gates using a twoqubit nmr system we experimentally demonstrate a significant protection against decoherence and incoherence we find better performances by phase alternating dd sequences with suitable spacings between the dd pulses interestingly we also find that dd sequences based on pi2 pulses perform as well as or even better than those with pi pulses in protecting the nonclassical correlation we also support the experimental results by analyzing the robustness of various dd schemes | [['a', 'quantum', 'memory', 'interacts', 'with', 'its', 'environment', 'and', 'loses', 'information', 'via', 'decoherence', 'as', 'well', 'as', 'incoherence', 'a', 'robust', 'quantum', 'control', 'that', 'prepares', 'preserves', 'and', 'manipulates', 'nonclassical', 'correlations', 'even', 'in', 'the', 'presence', 'of', 'environmental', 'influence', 'is', 'of', 'paramount', 'importance', 'in', 'quantum', 'information', 'processing', 'a', 'wellknown', 'technique', 'to', 'suppress', 'decoherence', 'namely', 'dynamical', 'decoupling', 'dd', 'consists', 'of', 'a', 'sequence', 'of', 'rapid', 'flips', 'applied', 'to', 'the', 'system', 'in', 'order', 'to', 'refocus', 'the', 'systemenvironment', 'interactions', 'in', 'this', 'work', 'we', 'integrate', 'dd', 'with', 'quantum', 'gates', 'using', 'optimal', 'control', 'techniques', 'to', 'realize', 'robust', 'quantum', 'gates', 'which', 'offer', 'protection', 'against', 'decoherence', 'to', 'investigate', 'the', 'protection', 'of', 'nonclassical', 'correlation', 'we', 'study', 'the', 'evolution', 'of', 'quantum', 'discord', 'in', 'grovers', 'search', 'algorithm', 'implemented', 'with', 'dynamically', 'protected', 'gates', 'using', 'a', 'twoqubit', 'nmr', 'system', 'we', 'experimentally', 'demonstrate', 'a', 'significant', 'protection', 'against', 'decoherence', 'and', 'incoherence', 'we', 'find', 'better', 'performances', 'by', 'phase', 'alternating', 'dd', 'sequences', 'with', 'suitable', 'spacings', 'between', 'the', 'dd', 'pulses', 'interestingly', 'we', 'also', 'find', 'that', 'dd', 'sequences', 'based', 'on', 'pi2', 'pulses', 'perform', 'as', 'well', 'as', 'or', 'even', 'better', 'than', 'those', 'with', 'pi', 'pulses', 'in', 'protecting', 'the', 'nonclassical', 'correlation', 'we', 'also', 'support', 'the', 'experimental', 'results', 'by', 'analyzing', 'the', 'robustness', 'of', 'various', 'dd', 'schemes']] | [-0.1682913938473181, 0.1661212654444315, -0.09383175786856868, 0.09903762807943932, 0.01603940286964336, -0.22908388504021795, 0.08590091499635487, 0.3920579273352232, -0.2740069933151876, -0.27500567455386754, 0.059083883989375655, -0.2535279698980351, -0.1456471693876973, 0.22128538135192777, -0.05328525108329597, 0.11611197794025034, 0.06721422640931984, 0.00014216623086699102, -0.08694810357154839, -0.23034675688440936, 0.27735537113671105, 0.04131692840727588, 0.30324994146493733, 0.0009611956060681709, 0.06785728282137483, 0.05700411005487675, 0.03909058970887037, -0.05463006027121708, -0.06266847971456295, 0.04603927041479096, 0.23995758895885455, 0.11179545485271664, 0.25322858785111557, -0.44302830656882003, -0.19520919914382, 0.11375826488867422, 0.1298184991535785, 0.19903075919429913, -0.08659588638015545, -0.34492480668372344, 0.08911261150968217, -0.16452704428722245, -0.08007524442697614, -0.16222151477757113, -0.007676656017937358, 0.004814193059232027, -0.2799236152828338, 0.07137048264371636, 0.08866280444732019, 0.050904915162987965, 0.01954815385151142, -0.020932719529059434, 0.020281140710086753, 0.1354576263936463, -0.03789531707729178, 0.018808552989164593, 0.16970312808487545, -0.09374753846885468, -0.2062523469831499, 0.35873102536178614, -0.06379754500189197, -0.18473593863072219, 0.18321122680100854, -0.0856737966720685, -0.08335907479856537, 0.06698055048202159, 0.13738915395169032, 0.07046456434443672, -0.12763655636577853, 0.01741174257960338, 0.07282339169757154, 0.23176957191110997, 0.05537104969794946, 0.18361590508489856, 0.1648668630501975, 0.16457964394675204, 0.09481453962091889, 0.20984681628807078, -0.08366757337815157, -0.15582370579676338, -0.2408995363810814, -0.13952935979795203, -0.1912449994740426, 0.07072627825770901, -0.04013939940707238, -0.12155554586991904, 0.40488562811777074, 0.1943808880674027, 0.15043316795318215, -0.0005123127585556605, 0.3380905330161411, 0.07231694699890873, 0.07681572742306839, 0.041470629508020704, 0.22762397839256596, 0.1508696120818732, 0.037024637800025406, -0.33907588284213847, 0.08600747326364933, -0.025720355392891973] |
1,802.02793 | Local Picard Group of Pointed Monoids and Their Algebras | The main goal of this paper is to give an explicit formula for the cohomology
of the sheaf of units of the punctured spectrum of a Stanley-Reisner ring. In
particular we compute the local Picard group of $K [\triangle]$. To achieve
this we study the corresponding purely combinatorial problem on the punctured
spectrum of the pointed monoid defined by $\triangle$. The cohomology of the
sheaf of units on ${\rm Spec}^ \bullet K[\triangle ]$ is then the direct sum of
this combinatorial cohomology, which has a decomposition along the vertices,
and another part depending on the field $K$.
| math.AC math.AG | the main goal of this paper is to give an explicit formula for the cohomology of the sheaf of units of the punctured spectrum of a stanleyreisner ring in particular we compute the local picard group of k triangle to achieve this we study the corresponding purely combinatorial problem on the punctured spectrum of the pointed monoid defined by triangle the cohomology of the sheaf of units on rm spec bullet ktriangle is then the direct sum of this combinatorial cohomology which has a decomposition along the vertices and another part depending on the field k | [['the', 'main', 'goal', 'of', 'this', 'paper', 'is', 'to', 'give', 'an', 'explicit', 'formula', 'for', 'the', 'cohomology', 'of', 'the', 'sheaf', 'of', 'units', 'of', 'the', 'punctured', 'spectrum', 'of', 'a', 'stanleyreisner', 'ring', 'in', 'particular', 'we', 'compute', 'the', 'local', 'picard', 'group', 'of', 'k', 'triangle', 'to', 'achieve', 'this', 'we', 'study', 'the', 'corresponding', 'purely', 'combinatorial', 'problem', 'on', 'the', 'punctured', 'spectrum', 'of', 'the', 'pointed', 'monoid', 'defined', 'by', 'triangle', 'the', 'cohomology', 'of', 'the', 'sheaf', 'of', 'units', 'on', 'rm', 'spec', 'bullet', 'ktriangle', 'is', 'then', 'the', 'direct', 'sum', 'of', 'this', 'combinatorial', 'cohomology', 'which', 'has', 'a', 'decomposition', 'along', 'the', 'vertices', 'and', 'another', 'part', 'depending', 'on', 'the', 'field', 'k']] | [-0.20999640772413267, -0.01656678524833344, -0.10386050300378548, 0.0038151579112500737, -0.10092761862140737, -0.06313428672912874, 0.010307810995972862, 0.300084925540968, -0.39510591716358534, -0.225267276079639, 0.10500376538594107, -0.23699617876524204, -0.11685534055883948, 0.16516392336864222, -0.13088686543663866, -0.04231231935616386, 0.01844628976020766, 0.14324905200322208, -0.06063226239103211, -0.26071748520786825, 0.42314828653868874, 0.04014054716099054, 0.20267681357891937, 0.07592917546433837, 0.11190971720375513, 0.008069310601384036, -0.03744679079145977, -0.04211145905581744, -0.18778299721399028, 0.16711792743299156, 0.2627731659988824, 0.06668059642083551, 0.17430060278428228, -0.4057226571107381, -0.07863818685965318, 0.18594386793771073, 0.13051127367285326, -0.00363956147339195, 0.016186677408404647, -0.22175401523709298, 0.14540692074224354, -0.15182957566882435, -0.10003048133007006, -0.01514280657038877, 0.06857100501288906, 0.015567703758317388, -0.21061001832744008, -0.02511222544861467, 0.06296214161342696, 0.12897636150255015, -0.047685926504384135, -0.11275145373258151, -0.037470498739888794, 0.09044185183010996, -0.013699987261114936, 0.05587768067703827, 0.13055619990551157, -0.10498442158936278, -0.13115897741854976, 0.4097696504310558, -0.05416152525301042, -0.1665208868559842, 0.08953963703917045, -0.15517168214152519, -0.17026760207587166, 0.1319122116154942, 0.0749074626812025, 0.20132658795306557, -0.004741955857331816, 0.17235130394110457, -0.17255346135873545, 0.10527983671544414, 0.07234403096923703, 0.006630583636854824, 0.14377705577123714, 0.10728972102025229, 0.1013305936845044, 0.1741824367524762, -0.03739692613139357, -0.0339724571787213, -0.3701199057855104, -0.22571049334579393, -0.17782911136746407, 0.12827352813297982, -0.11313087612614157, -0.17474290873169115, 0.45750470406522875, 0.07231994759977649, 0.21603487818746975, 0.11550578824612066, 0.288674251142105, 0.0913649211098489, 0.0625451985746622, 0.019964975824481562, 0.1511427532023701, 0.21953288211095098, -0.027702673220712886, -0.18612249899459513, -0.04009215333744099, 0.20680057954435285] |
1,802.02794 | Position-Constrained Stochastic Inference for Cooperative Indoor
Localization | We address the problem of distributed cooperative localization in wireless
networks, i.e. nodes without prior position knowledge (agents) wish to
determine their own positions. In non-cooperative approaches, positioning is
only based on information from reference nodes with known positions (anchors).
However, in cooperative positioning, information from other agents is
considered as well. Cooperative positioning requires encoding of the
uncertainty of agents' positions. To cope with that demand, we employ
stochastic inference for localization which inherently considers the position
uncertainty of agents. However, stochastic inference comes at the expense of
high costs in terms of computation and information exchange. To relax the
requirements of inference algorithms, we propose the framework of
position-constrained stochastic inference, in which we first confine the
positions of nodes to feasible sets. We use convex polygons to impose
constraints on the possible positions of agents. By doing so, we enable
inference algorithms to concentrate on important regions of the sample space
rather than the entire sample space. We show through simulations that increased
localization accuracy, reduced computational complexity, and quicker
convergence can be achieved when compared to a state-of-the-art non-constrained
inference algorithm.
| eess.SP | we address the problem of distributed cooperative localization in wireless networks ie nodes without prior position knowledge agents wish to determine their own positions in noncooperative approaches positioning is only based on information from reference nodes with known positions anchors however in cooperative positioning information from other agents is considered as well cooperative positioning requires encoding of the uncertainty of agents positions to cope with that demand we employ stochastic inference for localization which inherently considers the position uncertainty of agents however stochastic inference comes at the expense of high costs in terms of computation and information exchange to relax the requirements of inference algorithms we propose the framework of positionconstrained stochastic inference in which we first confine the positions of nodes to feasible sets we use convex polygons to impose constraints on the possible positions of agents by doing so we enable inference algorithms to concentrate on important regions of the sample space rather than the entire sample space we show through simulations that increased localization accuracy reduced computational complexity and quicker convergence can be achieved when compared to a stateoftheart nonconstrained inference algorithm | [['we', 'address', 'the', 'problem', 'of', 'distributed', 'cooperative', 'localization', 'in', 'wireless', 'networks', 'ie', 'nodes', 'without', 'prior', 'position', 'knowledge', 'agents', 'wish', 'to', 'determine', 'their', 'own', 'positions', 'in', 'noncooperative', 'approaches', 'positioning', 'is', 'only', 'based', 'on', 'information', 'from', 'reference', 'nodes', 'with', 'known', 'positions', 'anchors', 'however', 'in', 'cooperative', 'positioning', 'information', 'from', 'other', 'agents', 'is', 'considered', 'as', 'well', 'cooperative', 'positioning', 'requires', 'encoding', 'of', 'the', 'uncertainty', 'of', 'agents', 'positions', 'to', 'cope', 'with', 'that', 'demand', 'we', 'employ', 'stochastic', 'inference', 'for', 'localization', 'which', 'inherently', 'considers', 'the', 'position', 'uncertainty', 'of', 'agents', 'however', 'stochastic', 'inference', 'comes', 'at', 'the', 'expense', 'of', 'high', 'costs', 'in', 'terms', 'of', 'computation', 'and', 'information', 'exchange', 'to', 'relax', 'the', 'requirements', 'of', 'inference', 'algorithms', 'we', 'propose', 'the', 'framework', 'of', 'positionconstrained', 'stochastic', 'inference', 'in', 'which', 'we', 'first', 'confine', 'the', 'positions', 'of', 'nodes', 'to', 'feasible', 'sets', 'we', 'use', 'convex', 'polygons', 'to', 'impose', 'constraints', 'on', 'the', 'possible', 'positions', 'of', 'agents', 'by', 'doing', 'so', 'we', 'enable', 'inference', 'algorithms', 'to', 'concentrate', 'on', 'important', 'regions', 'of', 'the', 'sample', 'space', 'rather', 'than', 'the', 'entire', 'sample', 'space', 'we', 'show', 'through', 'simulations', 'that', 'increased', 'localization', 'accuracy', 'reduced', 'computational', 'complexity', 'and', 'quicker', 'convergence', 'can', 'be', 'achieved', 'when', 'compared', 'to', 'a', 'stateoftheart', 'nonconstrained', 'inference', 'algorithm']] | [-0.13522520386512674, 0.00797730120425315, -0.01954505305215919, 0.050103155003971944, -0.1102609223301482, -0.17321917009489288, 0.13318221732776653, 0.43571266035913775, -0.28800842890252726, -0.348716287931893, 0.08465910861812755, -0.24284235871417206, -0.11876330678806761, 0.11483232918544672, -0.14676171454329565, 0.05435734616754496, 0.09159658510812417, 0.07164408325258156, -0.05605047531002049, -0.25840991496806964, 0.26778838178079634, 0.09063681282872416, 0.30514820148844435, -0.033858582832971995, 0.13078607994374697, 0.045989653622002705, -0.03569467675381178, 0.04075930462662971, -0.11432684271043715, 0.17783683985307225, 0.30121354403419665, 0.19540164724964162, 0.3368643216697661, -0.4709884330383394, -0.19549303513485938, 0.13033298085476575, 0.18478879336544196, 0.14450362666874475, 0.028168846813217817, -0.3048264225059108, 0.05801855314664705, -0.1328389087651411, -0.05906835472231488, -0.08014856238216216, -0.047267335292417556, 0.060690602691307584, -0.27108471556161734, 0.040508164037221475, 0.013276476345313511, 0.0391518412203447, -0.06195860212091762, -0.09868287771646662, 0.007972463169489461, 0.17565628826259458, 0.02986071973219109, -0.015575023940270868, 0.1652182923584326, -0.1334555542403984, -0.16298538015183547, 0.3970932524054028, 0.02339872273668057, -0.23416327328785605, 0.1813090370522569, -0.0917294342855356, -0.16452798898630452, 0.14080656514978845, 0.24389371870315896, 0.1193829859156445, -0.1622056949763646, 0.05660836478130912, 0.03290388665577073, 0.18054019746436414, 0.04392104543196341, 0.07394204668336264, 0.14472556979656118, 0.19930374172500984, 0.1718479050019675, 0.10653154465525523, -0.09872959115739871, -0.1543869783474846, -0.21592111403183284, -0.0903563228101753, -0.21427574452852993, -0.002414249060877963, -0.10451672793825982, -0.12092227512925013, 0.31709366199261835, 0.2377081951860379, 0.18856816859593178, 0.11625143105503292, 0.35196653602685296, 0.05223410989793078, 0.06167264599682075, 0.1210299697324998, 0.22855998849263415, 0.03361975186651208, 0.08466325867819884, -0.19168154624386932, 0.13103601065560486, 0.025658257239822135] |
1,802.02795 | An explicit symmetric DGLA model of a triangle | We give explicit formulae for a differential graded Lie algebra (DGLA) model
of the triangle which is symmetric under the geometric symmetries of the cell.
This follows the work of Lawrence-Sullivan on the (unique) DGLA model of the
interval and of Gadish-Griniasty-Lawrence on an explicit symmetric model of the
bi-gon. As in the case of the bi-gon, the essential intermediate step is the
construction of a symmetric point. Although in this warped geometry of points
given by solutions of the Maurer-Cartan equation and lines given by a gauge
transformation by Lie algebra elements of grading zero, the medians of a
triangle are not concurrent, various other geometric constructions can be
carried out. The construction can similarly be applied to give symmetric model
of arbitrary $k$-gons.
| math.AT | we give explicit formulae for a differential graded lie algebra dgla model of the triangle which is symmetric under the geometric symmetries of the cell this follows the work of lawrencesullivan on the unique dgla model of the interval and of gadishgriniastylawrence on an explicit symmetric model of the bigon as in the case of the bigon the essential intermediate step is the construction of a symmetric point although in this warped geometry of points given by solutions of the maurercartan equation and lines given by a gauge transformation by lie algebra elements of grading zero the medians of a triangle are not concurrent various other geometric constructions can be carried out the construction can similarly be applied to give symmetric model of arbitrary kgons | [['we', 'give', 'explicit', 'formulae', 'for', 'a', 'differential', 'graded', 'lie', 'algebra', 'dgla', 'model', 'of', 'the', 'triangle', 'which', 'is', 'symmetric', 'under', 'the', 'geometric', 'symmetries', 'of', 'the', 'cell', 'this', 'follows', 'the', 'work', 'of', 'lawrencesullivan', 'on', 'the', 'unique', 'dgla', 'model', 'of', 'the', 'interval', 'and', 'of', 'gadishgriniastylawrence', 'on', 'an', 'explicit', 'symmetric', 'model', 'of', 'the', 'bigon', 'as', 'in', 'the', 'case', 'of', 'the', 'bigon', 'the', 'essential', 'intermediate', 'step', 'is', 'the', 'construction', 'of', 'a', 'symmetric', 'point', 'although', 'in', 'this', 'warped', 'geometry', 'of', 'points', 'given', 'by', 'solutions', 'of', 'the', 'maurercartan', 'equation', 'and', 'lines', 'given', 'by', 'a', 'gauge', 'transformation', 'by', 'lie', 'algebra', 'elements', 'of', 'grading', 'zero', 'the', 'medians', 'of', 'a', 'triangle', 'are', 'not', 'concurrent', 'various', 'other', 'geometric', 'constructions', 'can', 'be', 'carried', 'out', 'the', 'construction', 'can', 'similarly', 'be', 'applied', 'to', 'give', 'symmetric', 'model', 'of', 'arbitrary', 'kgons']] | [-0.15356951722717513, 0.059588472770502124, -0.09635763063335852, 0.03606005600323119, -0.09581837194761442, -0.13821480944452266, 0.003292570155369298, 0.3325769427202402, -0.28854262966647626, -0.24547986677967973, 0.13591808179954834, -0.2117373934391165, -0.148304061109816, 0.1584867901138721, -0.08470000096807076, -0.007691214229130457, 0.016927337749004966, 0.09868438150583496, -0.11611850765128169, -0.23154890735543543, 0.37945268795855586, 0.028933047031563137, 0.2348272104056612, 0.014774991551906081, 0.13140157177563636, -0.003416501684114337, -0.03816989331971854, 0.0012136335154214212, -0.13326787558804837, 0.12756192840395436, 0.2487872309716148, 0.07769960008050886, 0.1561577313940131, -0.3997997880177272, -0.12509791087030597, 0.11094208992266606, 0.13954869408213022, 0.09119944784775257, -0.03829795105435375, -0.28257865289549133, 0.08524955776444967, -0.16718934225894871, -0.1711556422608649, -0.04024404168106435, 0.027185442538240984, 0.011557501522944338, -0.25588257756880334, 0.028569521538385392, 0.12905094918284205, 0.09502014197078684, -0.05622431545165337, -0.09869808796793222, -0.07269597803561707, 0.0930124893502873, -0.015324171027919699, 0.006883933697076094, 0.0864040527620443, -0.08673476972316782, -0.13763378611991123, 0.4015459130750969, -0.01616240732912575, -0.260055641373319, 0.09435229587195922, -0.12383592226486202, -0.1290631619800303, 0.1087228988875605, 0.1054112333945194, 0.15724590308438505, -0.11420184210123073, 0.18287649532430805, -0.1179228310751158, 0.0643357710789367, 0.07230021644218435, -0.03703341704808296, 0.18218255527843272, 0.0896706094518454, 0.08175377169578907, 0.15447328073787503, 0.009858531498109861, -0.11102055384957742, -0.3985294963293258, -0.17612734331510915, -0.11446315794995415, 0.09559393534824091, -0.14293282081334543, -0.19639616811107244, 0.41049445812560376, 0.07552762403182926, 0.2052609631200246, 0.048822403627245, 0.21581574788902916, 0.13673470584551745, 0.09386974573135376, -0.0005677627219307808, 0.1600972058546294, 0.17313935625885102, 0.02742562824688878, -0.1773057694531857, 0.016317224051172453, 0.15953023075276324] |
1,802.02796 | Peekaboo - Where are the Objects? Structure Adjusting Superpixels | This paper addresses the search for a fast and meaningful image segmentation
in the context of $k$-means clustering. The proposed method builds on a
widely-used local version of Lloyd's algorithm, called Simple Linear Iterative
Clustering (SLIC). We propose an algorithm which extends SLIC to dynamically
adjust the local search, adopting superpixel resolution dynamically to
structure existent in the image, and thus provides for more meaningful
superpixels in the same linear runtime as standard SLIC. The proposed method is
evaluated against state-of-the-art techniques and improved boundary adherence
and undersegmentation error are observed, whilst still remaining among the
fastest algorithms which are tested.
| cs.CV | this paper addresses the search for a fast and meaningful image segmentation in the context of kmeans clustering the proposed method builds on a widelyused local version of lloyds algorithm called simple linear iterative clustering slic we propose an algorithm which extends slic to dynamically adjust the local search adopting superpixel resolution dynamically to structure existent in the image and thus provides for more meaningful superpixels in the same linear runtime as standard slic the proposed method is evaluated against stateoftheart techniques and improved boundary adherence and undersegmentation error are observed whilst still remaining among the fastest algorithms which are tested | [['this', 'paper', 'addresses', 'the', 'search', 'for', 'a', 'fast', 'and', 'meaningful', 'image', 'segmentation', 'in', 'the', 'context', 'of', 'kmeans', 'clustering', 'the', 'proposed', 'method', 'builds', 'on', 'a', 'widelyused', 'local', 'version', 'of', 'lloyds', 'algorithm', 'called', 'simple', 'linear', 'iterative', 'clustering', 'slic', 'we', 'propose', 'an', 'algorithm', 'which', 'extends', 'slic', 'to', 'dynamically', 'adjust', 'the', 'local', 'search', 'adopting', 'superpixel', 'resolution', 'dynamically', 'to', 'structure', 'existent', 'in', 'the', 'image', 'and', 'thus', 'provides', 'for', 'more', 'meaningful', 'superpixels', 'in', 'the', 'same', 'linear', 'runtime', 'as', 'standard', 'slic', 'the', 'proposed', 'method', 'is', 'evaluated', 'against', 'stateoftheart', 'techniques', 'and', 'improved', 'boundary', 'adherence', 'and', 'undersegmentation', 'error', 'are', 'observed', 'whilst', 'still', 'remaining', 'among', 'the', 'fastest', 'algorithms', 'which', 'are', 'tested']] | [-0.024761483334880874, -0.043327523062165856, -0.12480985795120055, 0.08423647629834785, -0.09511459533973496, -0.17764830787546268, 0.040292800649640956, 0.4256481135098061, -0.2698193009191257, -0.35470290267194554, 0.09914650527949417, -0.18105970317553174, -0.14620680427916422, 0.18771551789642119, -0.10577441049315552, 0.12322013840853872, 0.08768401093236955, 0.03972687511843177, -0.06750940543249029, -0.2959393019958556, 0.241973989320421, 0.10940631988024947, 0.3315994601401657, -0.02486268898453748, 0.12875283963627893, 0.013916342569939276, -0.10272512370075035, 0.04233483734337779, -0.06814049448965505, 0.1699733165822379, 0.24713943407197694, 0.20834095115395318, 0.30259418736285726, -0.36939577312476124, -0.17055684851832908, 0.08251803680000329, 0.18862277322845294, 0.12983325428772016, -0.08425359519634806, -0.3331056822201993, 0.15544216428413102, -0.11074156181121447, -0.023112447830931384, -0.13947269563000686, -0.05059389455594344, -0.03009539344670749, -0.28781263519016254, 0.09646748731115667, 0.07586883547909484, -0.0018219140146185856, -0.07313733369268773, -0.13862795234049238, 0.050640861199486374, 0.09069285201517367, -0.006935111581264894, 0.07889712233059477, 0.14597817926234244, -0.1149029299538435, -0.15590725514558282, 0.37249323705414145, -0.03326916182874748, -0.1942755451614941, 0.19455624597681925, 0.00011361089516615514, -0.15645283977454988, 0.12012083343193304, 0.17711686521842337, 0.1571524222381413, -0.16772378425835402, 0.031106850950711286, -0.01802107545035421, 0.18530276217175148, 0.06025896460223611, -0.03535356131926327, 0.10548307226583509, 0.24906245274192626, 0.131483184682588, 0.14607634168293437, -0.14355535044952636, -0.08573806075964786, -0.20060645959381532, -0.11072591261126764, -0.1725447301287204, -0.14098897706348412, -0.13624195495820926, -0.18032457025740112, 0.43207920405386696, 0.21525637459789063, 0.2175014149674242, 0.10859567657635215, 0.3954640746780551, 0.0488167301449685, 0.1090718132379179, 0.14195095684545317, 0.1957162567863868, 0.02886571393043983, 0.061500654151285125, -0.22150372360985135, 0.08447879096919597, 0.16048126706927276] |
1,802.02797 | On matrix modified KP hierarchy | Using the bilinear formalism, we consider multicomponent and matrix modified
KP hierarchies. The main tool is the bilinear identity for the tau-function
which is realized as an expectation value of a Clifford group element composed
from multicomponent fermionic operators. We also construct the Baker-Akhiezer
functions and derive auxiliary linear equations satisfied by them.
| math-ph math.MP nlin.SI | using the bilinear formalism we consider multicomponent and matrix modified kp hierarchies the main tool is the bilinear identity for the taufunction which is realized as an expectation value of a clifford group element composed from multicomponent fermionic operators we also construct the bakerakhiezer functions and derive auxiliary linear equations satisfied by them | [['using', 'the', 'bilinear', 'formalism', 'we', 'consider', 'multicomponent', 'and', 'matrix', 'modified', 'kp', 'hierarchies', 'the', 'main', 'tool', 'is', 'the', 'bilinear', 'identity', 'for', 'the', 'taufunction', 'which', 'is', 'realized', 'as', 'an', 'expectation', 'value', 'of', 'a', 'clifford', 'group', 'element', 'composed', 'from', 'multicomponent', 'fermionic', 'operators', 'we', 'also', 'construct', 'the', 'bakerakhiezer', 'functions', 'and', 'derive', 'auxiliary', 'linear', 'equations', 'satisfied', 'by', 'them']] | [-0.12199250378487807, 0.0831218574062662, -0.053727596967738066, 0.1341344172635801, -0.10138309540068906, -0.15944437551716306, -0.036909423816843694, 0.2745456465361816, -0.3342326380958218, -0.2329348768546896, 0.09085537331565371, -0.2499479290256101, -0.20240906119908927, 0.16828178679834138, 0.012421285751152714, 0.06224159993459734, 0.011921330548401148, 0.026684266884090764, -0.18547213313890235, -0.22871711218009158, 0.42020141948805245, -0.04880471980937247, 0.2164504539643256, -0.03047166116324798, 0.164644518858349, 0.05595925734993422, -0.042966784760004505, -0.0862097454549446, -0.06179404264878271, 0.12234553976318324, 0.2535724666382555, 0.09494970158129087, 0.15025217310999925, -0.40991225086574284, -0.14839643992061885, 0.12627218367602183, 0.13937218192051043, 0.05008780689830979, -0.03429240176348754, -0.2946727748187083, 0.027219956092764886, -0.20914421605280126, -0.23993373599852313, -0.11860801996926795, 0.0040906976363709515, -0.010532991222615511, -0.33355083970247573, 0.08879286852469756, 0.015393703490636259, 0.015244883959585766, -0.07010892937113619, -0.16523878517086213, -0.033744232878440396, 0.03576564230903421, -0.053892694771693984, -0.03415851082481479, 0.06444679306082006, -0.08205042066017412, -0.06097783678088267, 0.3731750546304404, -0.1364895411995503, -0.30384282788859224, 0.07430442751227122, 0.0011021980471065584, -0.15303474308413295, 0.020389588514588913, 0.10554685600031659, 0.13830567402589433, -0.21326048174908138, 0.1717752298704823, -0.14646113231637567, 0.15218248571497653, 0.015202734057071074, 0.00802342635842989, 0.16037933156333584, 0.0779245419357464, 0.025767405236245326, 0.17581049524212503, 0.05200157775312996, -0.1400838738201924, -0.3379009172039212, -0.20149417965457928, -0.14663954991144393, 0.06383233023631685, -0.10895639997939931, -0.1648193230184744, 0.40807783125706437, 0.08981173664753167, 0.14725339828709247, 0.08395871662596276, 0.19995162059675972, 0.2834304203345212, 0.13078624062802433, 0.02185064508526955, 0.12270996501704431, 0.23084869923263365, 0.08632518649804143, -0.21293521468211316, -0.0664008924087404, 0.27280605125750573] |
1,802.02798 | Transductive Adversarial Networks (TAN) | Transductive Adversarial Networks (TAN) is a novel domain-adaptation machine
learning framework that is designed for learning a conditional probability
distribution on unlabelled input data in a target domain, while also only
having access to: (1) easily obtained labelled data from a related source
domain, which may have a different conditional probability distribution than
the target domain, and (2) a marginalised prior distribution on the labels for
the target domain. TAN leverages a fully adversarial training procedure and a
unique generator/encoder architecture which approximates the transductive
combination of the available source- and target-domain data. A benefit of TAN
is that it allows the distance between the source- and target-domain
label-vector marginal probability distributions to be greater than 0 (i.e.
different tasks across the source and target domains) whereas other
domain-adaptation algorithms require this distance to equal 0 (i.e. a single
task across the source and target domains). TAN can, however, still handle the
latter case and is a more generalised approach to this case. Another benefit of
TAN is that due to being a fully adversarial algorithm, it has the potential to
accurately approximate highly complex distributions. Theoretical analysis
demonstrates the viability of the TAN framework.
| stat.ML cs.LG | transductive adversarial networks tan is a novel domainadaptation machine learning framework that is designed for learning a conditional probability distribution on unlabelled input data in a target domain while also only having access to 1 easily obtained labelled data from a related source domain which may have a different conditional probability distribution than the target domain and 2 a marginalised prior distribution on the labels for the target domain tan leverages a fully adversarial training procedure and a unique generatorencoder architecture which approximates the transductive combination of the available source and targetdomain data a benefit of tan is that it allows the distance between the source and targetdomain labelvector marginal probability distributions to be greater than 0 ie different tasks across the source and target domains whereas other domainadaptation algorithms require this distance to equal 0 ie a single task across the source and target domains tan can however still handle the latter case and is a more generalised approach to this case another benefit of tan is that due to being a fully adversarial algorithm it has the potential to accurately approximate highly complex distributions theoretical analysis demonstrates the viability of the tan framework | [['transductive', 'adversarial', 'networks', 'tan', 'is', 'a', 'novel', 'domainadaptation', 'machine', 'learning', 'framework', 'that', 'is', 'designed', 'for', 'learning', 'a', 'conditional', 'probability', 'distribution', 'on', 'unlabelled', 'input', 'data', 'in', 'a', 'target', 'domain', 'while', 'also', 'only', 'having', 'access', 'to', '1', 'easily', 'obtained', 'labelled', 'data', 'from', 'a', 'related', 'source', 'domain', 'which', 'may', 'have', 'a', 'different', 'conditional', 'probability', 'distribution', 'than', 'the', 'target', 'domain', 'and', '2', 'a', 'marginalised', 'prior', 'distribution', 'on', 'the', 'labels', 'for', 'the', 'target', 'domain', 'tan', 'leverages', 'a', 'fully', 'adversarial', 'training', 'procedure', 'and', 'a', 'unique', 'generatorencoder', 'architecture', 'which', 'approximates', 'the', 'transductive', 'combination', 'of', 'the', 'available', 'source', 'and', 'targetdomain', 'data', 'a', 'benefit', 'of', 'tan', 'is', 'that', 'it', 'allows', 'the', 'distance', 'between', 'the', 'source', 'and', 'targetdomain', 'labelvector', 'marginal', 'probability', 'distributions', 'to', 'be', 'greater', 'than', '0', 'ie', 'different', 'tasks', 'across', 'the', 'source', 'and', 'target', 'domains', 'whereas', 'other', 'domainadaptation', 'algorithms', 'require', 'this', 'distance', 'to', 'equal', '0', 'ie', 'a', 'single', 'task', 'across', 'the', 'source', 'and', 'target', 'domains', 'tan', 'can', 'however', 'still', 'handle', 'the', 'latter', 'case', 'and', 'is', 'a', 'more', 'generalised', 'approach', 'to', 'this', 'case', 'another', 'benefit', 'of', 'tan', 'is', 'that', 'due', 'to', 'being', 'a', 'fully', 'adversarial', 'algorithm', 'it', 'has', 'the', 'potential', 'to', 'accurately', 'approximate', 'highly', 'complex', 'distributions', 'theoretical', 'analysis', 'demonstrates', 'the', 'viability', 'of', 'the', 'tan', 'framework']] | [-0.028810258950842688, 0.048424420937403574, -0.07378098364784309, 0.09054105667279155, -0.13026193110513565, -0.2105334878011264, 0.09536716571907691, 0.41249193780008375, -0.27195613592901685, -0.3308285791282132, 0.07357048198678458, -0.25979374266246763, -0.09934683777681441, 0.18887536802903357, -0.09640167195016972, 0.08693171699333531, 0.08618422566280927, 0.032491949488230316, -0.04763448740104744, -0.22298927424436946, 0.3326066800832285, 0.02978131800185445, 0.33525777059013673, 0.018129920185220288, 0.11512167018010652, -0.024497668196114233, 0.005967641192297765, -0.02200710041438823, -0.03900390726068857, 0.16504101735422716, 0.27369864095470486, 0.19124192463649062, 0.30425952277942486, -0.3301166301409815, -0.24895818764585134, 0.12281819105563309, 0.12385960741552471, 0.10979649205957515, -0.02706461812894601, -0.31441173827941554, 0.10724635086374579, -0.17635547816319092, -0.04581704558177316, -0.07481790862379142, 0.0051967630722593765, -0.008440865050226816, -0.354363166606488, 0.0389339569761536, 0.07940320253349271, -0.0026363004565991732, -0.018544600443212423, -0.13060593379449117, -0.001304975720460242, 0.142469931147761, 0.02657087219497816, 0.10318252326766213, 0.09944825507507422, -0.17118579020405217, -0.091190947506847, 0.3179599705099133, -0.01937443345445546, -0.2601122094578848, 0.2041987568342701, -0.09412821123878341, -0.1245771725239821, 0.11979998632242488, 0.19149662073492918, 0.16518479018891954, -0.174079801641173, 0.08750432835550438, -0.017211478963552206, 0.1909772379768993, 0.062222602320569594, -0.040573252501389025, 0.1608880113525596, 0.18721600467522528, 0.08573705193356229, 0.1456840672174956, -0.15004401486318733, -0.08870241475421839, -0.2667230133623502, -0.09083908778094141, -0.24035934783962262, -0.003848081791816868, -0.10140924960553678, -0.15727270385395214, 0.3567400426444612, 0.1649484328975071, 0.23904417206200293, 0.11180357260893731, 0.30983593732292325, 0.027441632388632533, 0.09728712772641698, 0.09889035850221659, 0.16836341704637622, 0.05209360495354459, 0.10444950462087332, -0.11846392352129163, 0.14328582210398708, -0.023381004404334514] |
1,802.02799 | One-center calculations of the electron-positron pair creation in
low-energy collisions of heavy bare nuclei | The probabilities of bound-free electron-positron pair creation are
calculated for head-on collisions of bare uranium nuclei beyond the monopole
approximation. The calculations are based on the numerical solving of the
time-dependent Dirac equation in the target reference frame with multipole
expansion of the projectile potential. In addition, the energy dependence of
the pair-creation cross section is studied in the monopole approximation.
| physics.atom-ph | the probabilities of boundfree electronpositron pair creation are calculated for headon collisions of bare uranium nuclei beyond the monopole approximation the calculations are based on the numerical solving of the timedependent dirac equation in the target reference frame with multipole expansion of the projectile potential in addition the energy dependence of the paircreation cross section is studied in the monopole approximation | [['the', 'probabilities', 'of', 'boundfree', 'electronpositron', 'pair', 'creation', 'are', 'calculated', 'for', 'headon', 'collisions', 'of', 'bare', 'uranium', 'nuclei', 'beyond', 'the', 'monopole', 'approximation', 'the', 'calculations', 'are', 'based', 'on', 'the', 'numerical', 'solving', 'of', 'the', 'timedependent', 'dirac', 'equation', 'in', 'the', 'target', 'reference', 'frame', 'with', 'multipole', 'expansion', 'of', 'the', 'projectile', 'potential', 'in', 'addition', 'the', 'energy', 'dependence', 'of', 'the', 'paircreation', 'cross', 'section', 'is', 'studied', 'in', 'the', 'monopole', 'approximation']] | [-0.09177787782105266, 0.1401161928279478, -0.05838402909833602, 0.12896395022179322, 0.013897308694259798, -0.034435508230731625, 0.0009625012390926236, 0.34258956772076793, -0.1607162409965865, -0.2738522006595721, -0.11048830860698992, -0.36636699336107637, 0.021614807001391394, 0.13090168052261358, 0.14951138583118798, 0.07377461347057195, 0.05957305348921017, 0.07962651947726969, -0.11079418176754577, -0.16637930435798376, 0.35271922232522096, 0.1323928493609438, 0.2578563575984025, 0.12125152187635664, 0.04307450996864526, 0.05492918688391686, -0.014514933882250648, -0.04066020841175904, -0.10638391437222723, 0.08892202376985357, 0.2191106602396877, 0.03571719715188517, 0.1889406936701204, -0.4381849955400971, -0.15773070458089933, 0.05555211187752544, 0.1562831319227326, 0.15473361798470503, -0.10050819656376528, -0.26871565347690074, 0.020843911114469416, -0.23314804629590669, -0.1667608127864383, -0.04842167827071714, 0.040981558991260214, 0.12234720364823694, -0.29230294929298223, 0.07391624870236779, -0.007400985816722644, -0.016020728669393632, -0.13976598049124672, -0.14902585323472492, -0.04356961005718493, 0.009094200318404397, 0.07760483785589668, 0.010587185697599512, 0.1908251201947693, -0.12402383592475938, -0.09340980113102276, 0.447000882145567, -0.056971078830175714, -0.19118578312155166, 0.07577356601851519, -0.18573764854370325, -0.049929058351019615, 0.20731582089525755, 0.17655633822785782, 0.15019358675850586, -0.1669767088558311, 0.1456627501785511, 0.01275027937209997, 0.08878224435812015, 0.16155652701854706, 0.007843201117376323, 0.1623109721532855, 0.17533692870228018, -0.038338063780951205, 0.07183088927117527, -0.13700325375224356, -0.14979564046991042, -0.38684213790492933, -0.10519113096973447, -0.18291350881584356, 0.01283068105303606, -0.0671251918357171, -0.18478001451089246, 0.3422135468572378, 0.07156090449053244, 0.18796117570190157, -0.07782133796908816, 0.31722395079302007, 0.20070494690024462, 0.0031471353741820717, 0.04408927977115649, 0.3452569045065368, 0.1747785398706061, 0.08918900214532605, -0.3101210598223156, 0.012848217551764405, 0.14577040306796304] |
1,802.028 | Analytical forms of the wave function and the asymmetry for polarization
characteristics of the deuteron | The basic analytical forms of the deuteron wave function (DWF) in a
coordinate representation have been reviewed. The asymptotic behaviour of DWF
near the origin of coordinates has been analyzed. New analytical forms of DWF
as a product of the exponential function r^n and the sum of the exponential
terms Ai*exp(-ai*r3) are applied for the calculation of the polarization
characteristics of the deuteron. Numerical calculations have been done for
realistic phenomenological potential of Nijmegen groups, Reid93. In the paper,
the results of the angular asymmetry for deuteron vector t10, t11 and tensor
t20, t21, t22 polarizations are described. Along with the angular asymmetry,
the momentum asymmetry for deuteron vector t1i polarizations is described too.
The influence of DWF approximation in a coordinate representation on the
subsequent results of the calculations of the tensor polarization t20 is
investigated. A comparison of values t20 is made at 70 degree if to apply four
different DWF approximations to the same NN-potential Reid93. When the received
theoretical values t20 are compared with the experimental data of world
collaborations and reviews, a good coordination for the area of values momentum
p=1-4fm-1 is observed. Using the method of invariant amplitude, spin
observables in backward elastic dp-scattering-tensor analyzing power T20 and
polarization transfer K0 have been calculated. The values of K0 and correlation
K0-T20 are compared with experimental data. In a wide range of momentums p and
scattering angles, the asymmetry for the tensor analyzing power T20 and T22 has
been presented, which characterizes the photoproduction of negative pi- meson
from deuteron in reaction g(d, pi-)pp. A symmetry of values T20 and T22
concerning a 90 angle is observed. The ratio R for the vector Px and tensor Pxz
polarizations is characterized by angular asymmetry....
| nucl-th | the basic analytical forms of the deuteron wave function dwf in a coordinate representation have been reviewed the asymptotic behaviour of dwf near the origin of coordinates has been analyzed new analytical forms of dwf as a product of the exponential function rn and the sum of the exponential terms aiexpair3 are applied for the calculation of the polarization characteristics of the deuteron numerical calculations have been done for realistic phenomenological potential of nijmegen groups reid93 in the paper the results of the angular asymmetry for deuteron vector t10 t11 and tensor t20 t21 t22 polarizations are described along with the angular asymmetry the momentum asymmetry for deuteron vector t1i polarizations is described too the influence of dwf approximation in a coordinate representation on the subsequent results of the calculations of the tensor polarization t20 is investigated a comparison of values t20 is made at 70 degree if to apply four different dwf approximations to the same nnpotential reid93 when the received theoretical values t20 are compared with the experimental data of world collaborations and reviews a good coordination for the area of values momentum p14fm1 is observed using the method of invariant amplitude spin observables in backward elastic dpscatteringtensor analyzing power t20 and polarization transfer k0 have been calculated the values of k0 and correlation k0t20 are compared with experimental data in a wide range of momentums p and scattering angles the asymmetry for the tensor analyzing power t20 and t22 has been presented which characterizes the photoproduction of negative pi meson from deuteron in reaction gd pipp a symmetry of values t20 and t22 concerning a 90 angle is observed the ratio r for the vector px and tensor pxz polarizations is characterized by angular asymmetry | [['the', 'basic', 'analytical', 'forms', 'of', 'the', 'deuteron', 'wave', 'function', 'dwf', 'in', 'a', 'coordinate', 'representation', 'have', 'been', 'reviewed', 'the', 'asymptotic', 'behaviour', 'of', 'dwf', 'near', 'the', 'origin', 'of', 'coordinates', 'has', 'been', 'analyzed', 'new', 'analytical', 'forms', 'of', 'dwf', 'as', 'a', 'product', 'of', 'the', 'exponential', 'function', 'rn', 'and', 'the', 'sum', 'of', 'the', 'exponential', 'terms', 'aiexpair3', 'are', 'applied', 'for', 'the', 'calculation', 'of', 'the', 'polarization', 'characteristics', 'of', 'the', 'deuteron', 'numerical', 'calculations', 'have', 'been', 'done', 'for', 'realistic', 'phenomenological', 'potential', 'of', 'nijmegen', 'groups', 'reid93', 'in', 'the', 'paper', 'the', 'results', 'of', 'the', 'angular', 'asymmetry', 'for', 'deuteron', 'vector', 't10', 't11', 'and', 'tensor', 't20', 't21', 't22', 'polarizations', 'are', 'described', 'along', 'with', 'the', 'angular', 'asymmetry', 'the', 'momentum', 'asymmetry', 'for', 'deuteron', 'vector', 't1i', 'polarizations', 'is', 'described', 'too', 'the', 'influence', 'of', 'dwf', 'approximation', 'in', 'a', 'coordinate', 'representation', 'on', 'the', 'subsequent', 'results', 'of', 'the', 'calculations', 'of', 'the', 'tensor', 'polarization', 't20', 'is', 'investigated', 'a', 'comparison', 'of', 'values', 't20', 'is', 'made', 'at', '70', 'degree', 'if', 'to', 'apply', 'four', 'different', 'dwf', 'approximations', 'to', 'the', 'same', 'nnpotential', 'reid93', 'when', 'the', 'received', 'theoretical', 'values', 't20', 'are', 'compared', 'with', 'the', 'experimental', 'data', 'of', 'world', 'collaborations', 'and', 'reviews', 'a', 'good', 'coordination', 'for', 'the', 'area', 'of', 'values', 'momentum', 'p14fm1', 'is', 'observed', 'using', 'the', 'method', 'of', 'invariant', 'amplitude', 'spin', 'observables', 'in', 'backward', 'elastic', 'dpscatteringtensor', 'analyzing', 'power', 't20', 'and', 'polarization', 'transfer', 'k0', 'have', 'been', 'calculated', 'the', 'values', 'of', 'k0', 'and', 'correlation', 'k0t20', 'are', 'compared', 'with', 'experimental', 'data', 'in', 'a', 'wide', 'range', 'of', 'momentums', 'p', 'and', 'scattering', 'angles', 'the', 'asymmetry', 'for', 'the', 'tensor', 'analyzing', 'power', 't20', 'and', 't22', 'has', 'been', 'presented', 'which', 'characterizes', 'the', 'photoproduction', 'of', 'negative', 'pi', 'meson', 'from', 'deuteron', 'in', 'reaction', 'gd', 'pipp', 'a', 'symmetry', 'of', 'values', 't20', 'and', 't22', 'concerning', 'a', '90', 'angle', 'is', 'observed', 'the', 'ratio', 'r', 'for', 'the', 'vector', 'px', 'and', 'tensor', 'pxz', 'polarizations', 'is', 'characterized', 'by', 'angular', 'asymmetry']] | [-0.1469179969421317, 0.15465101886685964, -0.10088803677364329, 0.056881513378041273, -0.04012943519170376, -0.07684488841893931, -0.012571400509080486, 0.37014435931498596, -0.19988126887325594, -0.25454846920993784, 0.03004244197339995, -0.3150354843877309, -0.04687016123265081, 0.16274026594560673, 0.0908879378764289, 0.08732750461956343, 0.025851677762218982, 0.047631786562376884, -0.11573658242874535, -0.17020651972637982, 0.2960364494690711, 0.06953145543374253, 0.28066981969738103, 0.09118687921593376, 0.08784721453231595, 0.030976830820878307, -0.052570941154135006, 0.002852878714944665, -0.10731942332005012, 0.06586690138899952, 0.23366002217744286, 0.06836453230526457, 0.13911454464682108, -0.37530179696276467, -0.16036412455075494, 0.0876102459073894, 0.1281753534864257, 0.08030928243833003, -0.034078542392037094, -0.24904823119269934, 0.07865981298625958, -0.1784048429496792, -0.14531455397051066, -0.11205702832014901, 0.08512394956448478, 0.03352500644102957, -0.3033932009480682, 0.08172344978826933, -0.011908709309361082, 0.09623516854413756, -0.09252261018367312, -0.25482936903953235, -0.0443550470369333, 0.05922938220284248, 0.10802239557754592, 0.09479043374000305, 0.09518058235709166, -0.10761401363060619, -0.10441208660337539, 0.37685468642979014, -0.049926357140685336, -0.20901908665723729, 0.07565905983024772, -0.19870903960046035, -0.08996608630912577, 0.14618824254011353, 0.1663105656625703, 0.10200803519015246, -0.13203850566973646, 0.11106095239768797, -0.03545915934744131, 0.12471989003515387, 0.12453593355719106, 0.03401108706165237, 0.1647914588477806, 0.13049036713815723, -0.045783349100652265, 0.08689615102848104, -0.10516861025392613, -0.10416130597062462, -0.30803704653463676, -0.11327659958108256, -0.17339902823412764, 0.06645591633495708, -0.09738392050080588, -0.06722673878704481, 0.4165940338197488, 0.04711086233641873, 0.23499505293137785, 0.03532619058882738, 0.2931753871863351, 0.11753770876106152, 0.08529217793203309, 0.050790298480946315, 0.29102789266208345, 0.19501028736270568, 0.1477969746371229, -0.24013386077515067, 0.06448892582164985, 0.004347419067358612] |
1,802.02801 | Constraining P and CP violation in the main decay of the neutral Sigma
hyperon | On general grounds based on quantum field theory the decay amplitude for
$\Sigma^0 \to \Lambda \gamma$ consists of a parity conserving magnetic and a
parity violating electric dipole transition moment. Because of the subsequent
self-analyzing weak decay of the $\Lambda$ hyperon the interference between
magnetic and electric dipole transition moment leads to an asymmetry in the
angular distribution. Comparing the decay distributions for the $\Sigma^0$
hyperon and its antiparticle gives access to possible C and CP violation. Based
on flavor SU(3) symmetry the present upper limit on the neutron electric dipole
moment can be translated to an upper limit for the angular asymmetry. It turns
out to be far below any experimental resolution that one can expect in the
foreseeable future. Thus any true observation of a CP violating angular
asymmetry would constitute physics beyond the standard model, even if extended
by a CP violating QCD theta-vacuum-angle term.
| hep-ph | on general grounds based on quantum field theory the decay amplitude for sigma0 to lambda gamma consists of a parity conserving magnetic and a parity violating electric dipole transition moment because of the subsequent selfanalyzing weak decay of the lambda hyperon the interference between magnetic and electric dipole transition moment leads to an asymmetry in the angular distribution comparing the decay distributions for the sigma0 hyperon and its antiparticle gives access to possible c and cp violation based on flavor su3 symmetry the present upper limit on the neutron electric dipole moment can be translated to an upper limit for the angular asymmetry it turns out to be far below any experimental resolution that one can expect in the foreseeable future thus any true observation of a cp violating angular asymmetry would constitute physics beyond the standard model even if extended by a cp violating qcd thetavacuumangle term | [['on', 'general', 'grounds', 'based', 'on', 'quantum', 'field', 'theory', 'the', 'decay', 'amplitude', 'for', 'sigma0', 'to', 'lambda', 'gamma', 'consists', 'of', 'a', 'parity', 'conserving', 'magnetic', 'and', 'a', 'parity', 'violating', 'electric', 'dipole', 'transition', 'moment', 'because', 'of', 'the', 'subsequent', 'selfanalyzing', 'weak', 'decay', 'of', 'the', 'lambda', 'hyperon', 'the', 'interference', 'between', 'magnetic', 'and', 'electric', 'dipole', 'transition', 'moment', 'leads', 'to', 'an', 'asymmetry', 'in', 'the', 'angular', 'distribution', 'comparing', 'the', 'decay', 'distributions', 'for', 'the', 'sigma0', 'hyperon', 'and', 'its', 'antiparticle', 'gives', 'access', 'to', 'possible', 'c', 'and', 'cp', 'violation', 'based', 'on', 'flavor', 'su3', 'symmetry', 'the', 'present', 'upper', 'limit', 'on', 'the', 'neutron', 'electric', 'dipole', 'moment', 'can', 'be', 'translated', 'to', 'an', 'upper', 'limit', 'for', 'the', 'angular', 'asymmetry', 'it', 'turns', 'out', 'to', 'be', 'far', 'below', 'any', 'experimental', 'resolution', 'that', 'one', 'can', 'expect', 'in', 'the', 'foreseeable', 'future', 'thus', 'any', 'true', 'observation', 'of', 'a', 'cp', 'violating', 'angular', 'asymmetry', 'would', 'constitute', 'physics', 'beyond', 'the', 'standard', 'model', 'even', 'if', 'extended', 'by', 'a', 'cp', 'violating', 'qcd', 'thetavacuumangle', 'term']] | [-0.13608748017854633, 0.22539402276050255, -0.07000015982977893, 0.1341790949298563, -0.11856950794625394, -0.1438515982907392, 0.10111289817426468, 0.27409570575470016, -0.22196895573414913, -0.2790154582174609, 0.008331745574694304, -0.27206567315967617, 0.022366204102631328, 0.1285366386248014, 0.09633401631168564, 0.010499892650222798, 0.002118467715993321, 0.07282434868924066, -0.07028742572158056, -0.131628042259602, 0.27101488099639387, 0.05523279411353956, 0.26864561567330086, 0.13021203371550458, 0.016776428234820465, -0.001940147048432608, 0.01916509774215773, -0.010495533083318447, -0.09774676963318096, 0.0381262743295975, 0.15195059725621932, 0.08500835196143586, 0.09341539662382027, -0.41444933717297455, -0.11622887823832076, 0.18057893612580436, 0.14748872337596758, 0.125635286279935, -0.04893351262942159, -0.33949839981703633, 0.06019575460647632, -0.13549123906695162, -0.1463026121119354, -0.13187367336343037, 0.05739943625256546, -0.04267478274612301, -0.36188022594037306, 0.08784419948830693, 0.05211736866887532, 0.017281994102823668, -0.011543749474451503, -0.1969752769123725, -0.00251921503899657, 0.04090584676750764, 0.12352547111175004, 0.06545897504808951, 0.1404270561210824, -0.1343666873112017, -0.13060296940313157, 0.4063940220987614, -0.08900115904429941, -0.20073240344788004, 0.06937040209130314, -0.2370140391946802, -0.152249848266563, 0.14712551097879756, 0.13610030218743446, 0.07456958947741256, -0.12761621131580703, 0.15698595495172302, -0.021401289104465013, 0.18231798344779582, 0.08448785815948659, 0.065336184666831, 0.31153166333378174, 0.1491669025335486, 0.09150793388815356, 0.07148914829016897, -0.12627134292044354, -0.08248628543089556, -0.38432240658788147, -0.10521843590493295, -0.15151248664474812, 0.13195116317444514, -0.06977916127474675, -0.10352253472293113, 0.3369546187851502, 0.10085797718675414, 0.16828234305092116, 0.009529308474552975, 0.3091363364507501, 0.14392875998477345, 0.0646602022691256, 0.01323877382694053, 0.32459740131003717, 0.20269265145753973, 0.14589105073923284, -0.33003368925581983, 0.08235715509576051, 0.025933579830009313] |
1,802.02802 | Nuclear physics uncertainties of the astrophysical gamma-process studied
through the 64Zn(p,alpha)61Cu and 64Zn(p,gamma)65Ga reactions | In a recent work, the cross section measurement of the 64Zn(p,alpha)61Cu
reaction was used to prove that the standard alpha-nucleus optical potentials
used in astrophysical network calculation fail to reproduce the experimental
data at energies relevant for heavy element nucleosynthesis. In the present
paper the analysis of the obtained experimental data is continued by comparing
the results with the predictions using different parameters. It is shown that
the recently suggested modification of the standard optical potential leads to
a better description of the data.
| nucl-ex nucl-th | in a recent work the cross section measurement of the 64znpalpha61cu reaction was used to prove that the standard alphanucleus optical potentials used in astrophysical network calculation fail to reproduce the experimental data at energies relevant for heavy element nucleosynthesis in the present paper the analysis of the obtained experimental data is continued by comparing the results with the predictions using different parameters it is shown that the recently suggested modification of the standard optical potential leads to a better description of the data | [['in', 'a', 'recent', 'work', 'the', 'cross', 'section', 'measurement', 'of', 'the', '64znpalpha61cu', 'reaction', 'was', 'used', 'to', 'prove', 'that', 'the', 'standard', 'alphanucleus', 'optical', 'potentials', 'used', 'in', 'astrophysical', 'network', 'calculation', 'fail', 'to', 'reproduce', 'the', 'experimental', 'data', 'at', 'energies', 'relevant', 'for', 'heavy', 'element', 'nucleosynthesis', 'in', 'the', 'present', 'paper', 'the', 'analysis', 'of', 'the', 'obtained', 'experimental', 'data', 'is', 'continued', 'by', 'comparing', 'the', 'results', 'with', 'the', 'predictions', 'using', 'different', 'parameters', 'it', 'is', 'shown', 'that', 'the', 'recently', 'suggested', 'modification', 'of', 'the', 'standard', 'optical', 'potential', 'leads', 'to', 'a', 'better', 'description', 'of', 'the', 'data']] | [-0.017616635226330394, 0.04171505597902529, -0.1046414127526384, 0.07557398528253367, -0.01882497492773705, -0.08991894983204014, 0.01193754976693855, 0.3336108035621155, -0.21514661239280577, -0.3095386663384466, 0.043502854532562196, -0.30257149929382715, -0.09171030515531732, 0.2440329415342176, -0.007109818823007216, 0.12825401549238757, 0.1388159494802176, 0.03713011865066477, -0.04381857490930033, -0.2271747187408338, 0.3117827232702669, 0.13257904603224563, 0.2875390178355646, 0.10132396897211311, 0.039541786209769905, -0.0009236364535628313, -0.07807595329920211, -0.006401333173860358, -0.14511473035998781, 0.15541690429223767, 0.2582188090954694, 0.09340211426760688, 0.15534159377307058, -0.44305580661418925, -0.2461425280647285, 0.10991005483363946, 0.09958037395725947, 0.15812987404460288, -0.09183068995655749, -0.2553555900343211, 0.06682575670777853, -0.1701951827853918, -0.1498545413410448, -0.09331444941505969, 0.011888290407607355, 0.024026803210860186, -0.3016988280655659, 0.04647242958399366, -0.01694016700543194, 0.016014235183955675, -0.0774898919394711, -0.1313923211285777, -0.0024257037081722036, 0.09517130349392453, 0.0627587799330702, 0.05196540419142749, 0.11563609420961465, -0.09361594797011061, -0.10820133900494282, 0.423074770763696, -0.0928202587437917, -0.1309893573473028, 0.16464941450450793, -0.13741449010838946, -0.14000306169906385, 0.12470072115131889, 0.14286471217455543, 0.07220662940372095, -0.18061141591204935, 0.0748254929932889, -0.012759977211076093, 0.14205479166885637, 0.023926123286631094, -0.016365840784217937, 0.11804480934852218, 0.20720656507884164, -0.05218869998647147, 0.08025017217171929, -0.11203672974763146, -0.08628467399716737, -0.3077829874356289, -0.10801953090781188, -0.1577474903539721, 0.013223657383112214, -0.06908897413165276, -0.10003311156838043, 0.4047115873096578, 0.18582475796925374, 0.25405508564807566, 0.012259710288370949, 0.3264182786715318, 0.11294515198096633, 0.10650593179266855, 0.007608501633337463, 0.33843667655958826, 0.13791803957569043, 0.1290364964494863, -0.22160600613892437, 0.09094657927487854, 0.02800443450953946] |
1,802.02803 | A New Tool for CME Arrival Time Prediction Using Machine Learning
Algorithms: CAT-PUMA | Coronal Mass Ejections (CMEs) are arguably the most violent eruptions in the
Solar System. CMEs can cause severe disturbances in the interplanetary space
and even affect human activities in many respects, causing damages to
infrastructure and losses of revenue. Fast and accurate prediction of CME
arrival time is then vital to minimize the disruption CMEs may cause when
interacting with geospace. In this paper, we propose a new approach for
partial-/full-halo CME Arrival Time Prediction Using Machine learning
Algorithms (CAT-PUMA). Via detailed analysis of the CME features and solar wind
parameters, we build a prediction engine taking advantage of 182 previously
observed geo-effective partial-/full-halo CMEs and using algorithms of the
Support Vector Machine (SVM). We demonstrate that CAT-PUMA is accurate and
fast. In particular, predictions after applying CAT-PUMA to a test set, that is
unknown to the engine, show a mean absolute prediction error $\sim$5.9 hours of
the CME arrival time, with 54% of the predictions having absolute errors less
than 5.9 hours. Comparison with other models reveals that CAT-PUMA has a more
accurate prediction for 77% of the events investigated; and can be carried out
very fast, i.e. within minutes after providing the necessary input parameters
of a CME. A practical guide containing the CAT-PUMA engine and the source code
of two examples are available in the Appendix, allowing the community to
perform their own applications for prediction using CAT-PUMA.
| astro-ph.SR | coronal mass ejections cmes are arguably the most violent eruptions in the solar system cmes can cause severe disturbances in the interplanetary space and even affect human activities in many respects causing damages to infrastructure and losses of revenue fast and accurate prediction of cme arrival time is then vital to minimize the disruption cmes may cause when interacting with geospace in this paper we propose a new approach for partialfullhalo cme arrival time prediction using machine learning algorithms catpuma via detailed analysis of the cme features and solar wind parameters we build a prediction engine taking advantage of 182 previously observed geoeffective partialfullhalo cmes and using algorithms of the support vector machine svm we demonstrate that catpuma is accurate and fast in particular predictions after applying catpuma to a test set that is unknown to the engine show a mean absolute prediction error sim59 hours of the cme arrival time with 54 of the predictions having absolute errors less than 59 hours comparison with other models reveals that catpuma has a more accurate prediction for 77 of the events investigated and can be carried out very fast ie within minutes after providing the necessary input parameters of a cme a practical guide containing the catpuma engine and the source code of two examples are available in the appendix allowing the community to perform their own applications for prediction using catpuma | [['coronal', 'mass', 'ejections', 'cmes', 'are', 'arguably', 'the', 'most', 'violent', 'eruptions', 'in', 'the', 'solar', 'system', 'cmes', 'can', 'cause', 'severe', 'disturbances', 'in', 'the', 'interplanetary', 'space', 'and', 'even', 'affect', 'human', 'activities', 'in', 'many', 'respects', 'causing', 'damages', 'to', 'infrastructure', 'and', 'losses', 'of', 'revenue', 'fast', 'and', 'accurate', 'prediction', 'of', 'cme', 'arrival', 'time', 'is', 'then', 'vital', 'to', 'minimize', 'the', 'disruption', 'cmes', 'may', 'cause', 'when', 'interacting', 'with', 'geospace', 'in', 'this', 'paper', 'we', 'propose', 'a', 'new', 'approach', 'for', 'partialfullhalo', 'cme', 'arrival', 'time', 'prediction', 'using', 'machine', 'learning', 'algorithms', 'catpuma', 'via', 'detailed', 'analysis', 'of', 'the', 'cme', 'features', 'and', 'solar', 'wind', 'parameters', 'we', 'build', 'a', 'prediction', 'engine', 'taking', 'advantage', 'of', '182', 'previously', 'observed', 'geoeffective', 'partialfullhalo', 'cmes', 'and', 'using', 'algorithms', 'of', 'the', 'support', 'vector', 'machine', 'svm', 'we', 'demonstrate', 'that', 'catpuma', 'is', 'accurate', 'and', 'fast', 'in', 'particular', 'predictions', 'after', 'applying', 'catpuma', 'to', 'a', 'test', 'set', 'that', 'is', 'unknown', 'to', 'the', 'engine', 'show', 'a', 'mean', 'absolute', 'prediction', 'error', 'sim59', 'hours', 'of', 'the', 'cme', 'arrival', 'time', 'with', '54', 'of', 'the', 'predictions', 'having', 'absolute', 'errors', 'less', 'than', '59', 'hours', 'comparison', 'with', 'other', 'models', 'reveals', 'that', 'catpuma', 'has', 'a', 'more', 'accurate', 'prediction', 'for', '77', 'of', 'the', 'events', 'investigated', 'and', 'can', 'be', 'carried', 'out', 'very', 'fast', 'ie', 'within', 'minutes', 'after', 'providing', 'the', 'necessary', 'input', 'parameters', 'of', 'a', 'cme', 'a', 'practical', 'guide', 'containing', 'the', 'catpuma', 'engine', 'and', 'the', 'source', 'code', 'of', 'two', 'examples', 'are', 'available', 'in', 'the', 'appendix', 'allowing', 'the', 'community', 'to', 'perform', 'their', 'own', 'applications', 'for', 'prediction', 'using', 'catpuma']] | [-0.07863592358843195, 0.10711271410374984, -0.033525415283644146, 0.13038499254361613, -0.09852934246494745, -0.11771874494744432, 0.06474708474860036, 0.4373132510380329, -0.1872341185792864, -0.39458886255804254, 0.10611395823275017, -0.2588780805582932, -0.1172981947484802, 0.25579163073863337, -0.07383251857888688, 0.0762718735505794, 0.1781646951444839, 0.0440530875583359, -0.08394597226083932, -0.22933208113617934, 0.20445728126357784, 0.12368941176662288, 0.22219612101387037, 0.0019163927732223417, 0.11424333949802085, -0.0397983687588222, -0.06611066659107771, -0.03352504013846077, -0.052812079018207315, 0.085569791528478, 0.21396975798232457, 0.1726907384112118, 0.30585413278701407, -0.4409059257728554, -0.24442904942317686, 0.06783409811874949, 0.15062961916096115, 0.052039803781857095, -0.030742540909909223, -0.2888107092105457, 0.09116007933207265, -0.1697919315141789, -0.08635848718327716, -0.032062179952239, 0.03874850390109299, 0.0174711137037855, -0.3063493015932883, 0.09287054623653826, 0.010075576691234713, 0.08562622226268184, -0.08013258751797318, -0.06913464758167322, 0.004689490288830967, 0.16627970558814317, 0.11522618353697717, 0.06315079262365766, 0.191411829594392, -0.10713649057811779, -0.12155564777806335, 0.42577415858313705, -0.026085741739638922, -0.11341472398571409, 0.1901154110449154, -0.13096784254160235, -0.14238626019530848, 0.1622483041137457, 0.22435054625792986, 0.06612237563291401, -0.16384936721359528, -0.04262473206485115, 0.014229436607198104, 0.14704153974328124, 0.023035146421630327, -0.017469143439819545, 0.20306920017761163, 0.1954655872204488, 0.025904496185830794, 0.09225769281124883, -0.14840440539512456, -0.05445819448990127, -0.25938746045351746, -0.1331814227520673, -0.10475021933834477, 0.015338836150476709, -0.11060339932303402, -0.15654038033538023, 0.42801435849947955, 0.2267705524322912, 0.18004786268105372, 0.02272829288624946, 0.31133201052516435, 0.07390606373079017, 0.057444392146926634, 0.17115801838512548, 0.261754769123192, 0.07979190759993926, 0.1362283474054972, -0.17631952204790555, 0.13841601758746006, 0.05649607511964349] |
1,802.02804 | A Deep X-ray View of the Synchrotron-Dominated Supernova Remnant
G330.2+1.0 | We present moderately deep (125 ks) {\it XMM-Newton} observations of
supernova remnant G330.2$+$1.0. This remnant is one of only a few known that
fall into "synchrotron-dominated" category, with the emission almost entirely
dominated by a nonthermal continuum. Previous X-ray observations could only
characterize the spectra of a few regions. Here, we examine the spectra from
fourteen regions surrounding the entire rim, finding that the spectral
properties of the nonthermal emission do not vary significantly in any
systematic way from one part of the forward shock to another, unlike several
other remnants of this class. We confirm earlier findings that the power-law
index, $\Gamma$, ranges from about 2.1-2.5, while the absorbing column density
is generally between 2.0-2.6 $\times 10^{22}$ cm$^{-2}$. Fits with the {\it
srcut} model find values of the roll-off frequency in the range of 10$^{17.1} -
10^{17.5}$ Hz, implying energies of accelerated electrons of $\sim 100$ TeV.
These values imply a high shock velocity of $\sim 4600$ km s$^{-1}$, favoring a
young age of the remnant. Diffuse emission from the interior is nonthermal in
origin as well, and fits to these regions yield similar values to those along
the rim, also implying a young age. Thermal emission is present in the east,
and the spectrum is consistent with a $\sim 650$ km s$^{-1}$ shock wave
encountering interstellar or circumstellar material with a density of $\sim 1$
cm$^{-3}$.
| astro-ph.HE | we present moderately deep 125 ks it xmmnewton observations of supernova remnant g330210 this remnant is one of only a few known that fall into synchrotrondominated category with the emission almost entirely dominated by a nonthermal continuum previous xray observations could only characterize the spectra of a few regions here we examine the spectra from fourteen regions surrounding the entire rim finding that the spectral properties of the nonthermal emission do not vary significantly in any systematic way from one part of the forward shock to another unlike several other remnants of this class we confirm earlier findings that the powerlaw index gamma ranges from about 2125 while the absorbing column density is generally between 2026 times 1022 cm2 fits with the it srcut model find values of the rolloff frequency in the range of 10171 10175 hz implying energies of accelerated electrons of sim 100 tev these values imply a high shock velocity of sim 4600 km s1 favoring a young age of the remnant diffuse emission from the interior is nonthermal in origin as well and fits to these regions yield similar values to those along the rim also implying a young age thermal emission is present in the east and the spectrum is consistent with a sim 650 km s1 shock wave encountering interstellar or circumstellar material with a density of sim 1 cm3 | [['we', 'present', 'moderately', 'deep', '125', 'ks', 'it', 'xmmnewton', 'observations', 'of', 'supernova', 'remnant', 'g330210', 'this', 'remnant', 'is', 'one', 'of', 'only', 'a', 'few', 'known', 'that', 'fall', 'into', 'synchrotrondominated', 'category', 'with', 'the', 'emission', 'almost', 'entirely', 'dominated', 'by', 'a', 'nonthermal', 'continuum', 'previous', 'xray', 'observations', 'could', 'only', 'characterize', 'the', 'spectra', 'of', 'a', 'few', 'regions', 'here', 'we', 'examine', 'the', 'spectra', 'from', 'fourteen', 'regions', 'surrounding', 'the', 'entire', 'rim', 'finding', 'that', 'the', 'spectral', 'properties', 'of', 'the', 'nonthermal', 'emission', 'do', 'not', 'vary', 'significantly', 'in', 'any', 'systematic', 'way', 'from', 'one', 'part', 'of', 'the', 'forward', 'shock', 'to', 'another', 'unlike', 'several', 'other', 'remnants', 'of', 'this', 'class', 'we', 'confirm', 'earlier', 'findings', 'that', 'the', 'powerlaw', 'index', 'gamma', 'ranges', 'from', 'about', '2125', 'while', 'the', 'absorbing', 'column', 'density', 'is', 'generally', 'between', '2026', 'times', '1022', 'cm2', 'fits', 'with', 'the', 'it', 'srcut', 'model', 'find', 'values', 'of', 'the', 'rolloff', 'frequency', 'in', 'the', 'range', 'of', '10171', '10175', 'hz', 'implying', 'energies', 'of', 'accelerated', 'electrons', 'of', 'sim', '100', 'tev', 'these', 'values', 'imply', 'a', 'high', 'shock', 'velocity', 'of', 'sim', '4600', 'km', 's1', 'favoring', 'a', 'young', 'age', 'of', 'the', 'remnant', 'diffuse', 'emission', 'from', 'the', 'interior', 'is', 'nonthermal', 'in', 'origin', 'as', 'well', 'and', 'fits', 'to', 'these', 'regions', 'yield', 'similar', 'values', 'to', 'those', 'along', 'the', 'rim', 'also', 'implying', 'a', 'young', 'age', 'thermal', 'emission', 'is', 'present', 'in', 'the', 'east', 'and', 'the', 'spectrum', 'is', 'consistent', 'with', 'a', 'sim', '650', 'km', 's1', 'shock', 'wave', 'encountering', 'interstellar', 'or', 'circumstellar', 'material', 'with', 'a', 'density', 'of', 'sim', '1', 'cm3']] | [-0.05886904399694325, 0.16213510244149337, -0.053581180037635213, 0.06584772298939215, -0.07591550864816729, -0.07275002590064698, 0.04784648399594925, 0.4399543666334142, -0.20463646169842142, -0.3439698872825188, 0.07900353601419814, -0.3021269383663845, 0.03443857002080242, 0.19749217967980742, 0.010865339327250742, -0.10029516047686554, 0.0521959594326783, -0.037286026969486394, -0.05972016510135178, -0.14895118265884563, 0.24606999462380152, 0.08853634240376017, 0.16485076302678903, 0.03738261534566253, 0.053173799216203674, -0.11840842887046357, -0.01623526001595256, -0.039308204196623245, -0.12859069209005186, 0.07179762974652228, 0.19854137642055983, 0.10165171951490418, 0.2048257438856739, -0.35759506923339374, -0.2647317743035534, 0.07008470295767386, 0.18829281915836693, -0.0018341453147986452, -0.007300313771394644, -0.2724748160566987, 0.05185822331006044, -0.2274056696763779, -0.20900400147244072, 0.10957900261186425, 0.03045963635052747, 0.00916198497260654, -0.19596083650605484, 0.17412118633297716, -0.006541293577520825, 0.03294374715456829, -0.12000595212253508, -0.136298062813177, -0.028550951174431634, 0.01918997012575194, 0.07888462701720075, 0.059991883932477445, 0.1819582493126491, -0.12630983044717478, -0.02205038651627066, 0.38721707966876123, -0.0703864555327952, 0.015429446779372014, 0.22907916718010796, -0.24408558104392386, -0.15200322898851487, 0.27504686858004473, 0.0776476669556047, 0.0889519854666181, -0.11334748824572166, 0.018250866392565818, -0.06469151757944464, 0.22838626174377813, 0.06576965559409349, 0.049225817764151504, 0.2816945939788406, 0.09587273975713219, 0.01862871780989503, 0.10255794874971962, -0.22520880124404502, -0.01430702307938479, -0.2906720977736071, -0.08882462479366966, -0.12089825388903644, 0.11216414378189773, -0.14899304612539196, -0.12076880025476348, 0.3675695433756255, 0.12966629592824874, 0.2522283156755245, 0.037374521816961694, 0.2666791025451733, 0.08825374293266201, 0.06854047486199566, 0.16716906069552256, 0.2956933609460222, 0.15875642431904008, 0.09703053212068187, -0.16190755224093337, 0.055132523622150466, -0.028755430402931662] |
1,802.02805 | Holographic estimate of heavy quark diffusion in a magnetic field | We study the influence of a background magnetic field on the $J/\psi$ vector
meson in a DBI-extension of the soft wall model, building upon our earlier work
Phys. Rev. D91, 086002 (2015). In this specific holographic QCD model, we
discuss the heavy quark number susceptibility and diffusion constants of charm
quarks and their dependence on the magnetic field by either a hydrodynamic
expansion or by numerically solving the differential equation. This allows us
to determine the response of these transport coefficients to the magnetic
field. The effects of the latter are considered both from a direct as indirect
(medium) viewpoint. As expected, we find a magnetic field induced anisotropic
diffusion, with a stronger diffusion in the longitudinal direction compared to
the transversal one. We backup, at least qualitatively, our findings with a
hanging string analysis of heavy quark diffusion in a magnetic field. From the
quark number susceptibility we can extract an estimate for the effective
deconfinement temperature in the heavy quark sector, reporting consistency with
the phenomenon of inverse magnetic catalysis.
| hep-th hep-ph | we study the influence of a background magnetic field on the jpsi vector meson in a dbiextension of the soft wall model building upon our earlier work phys rev d91 086002 2015 in this specific holographic qcd model we discuss the heavy quark number susceptibility and diffusion constants of charm quarks and their dependence on the magnetic field by either a hydrodynamic expansion or by numerically solving the differential equation this allows us to determine the response of these transport coefficients to the magnetic field the effects of the latter are considered both from a direct as indirect medium viewpoint as expected we find a magnetic field induced anisotropic diffusion with a stronger diffusion in the longitudinal direction compared to the transversal one we backup at least qualitatively our findings with a hanging string analysis of heavy quark diffusion in a magnetic field from the quark number susceptibility we can extract an estimate for the effective deconfinement temperature in the heavy quark sector reporting consistency with the phenomenon of inverse magnetic catalysis | [['we', 'study', 'the', 'influence', 'of', 'a', 'background', 'magnetic', 'field', 'on', 'the', 'jpsi', 'vector', 'meson', 'in', 'a', 'dbiextension', 'of', 'the', 'soft', 'wall', 'model', 'building', 'upon', 'our', 'earlier', 'work', 'phys', 'rev', 'd91', '086002', '2015', 'in', 'this', 'specific', 'holographic', 'qcd', 'model', 'we', 'discuss', 'the', 'heavy', 'quark', 'number', 'susceptibility', 'and', 'diffusion', 'constants', 'of', 'charm', 'quarks', 'and', 'their', 'dependence', 'on', 'the', 'magnetic', 'field', 'by', 'either', 'a', 'hydrodynamic', 'expansion', 'or', 'by', 'numerically', 'solving', 'the', 'differential', 'equation', 'this', 'allows', 'us', 'to', 'determine', 'the', 'response', 'of', 'these', 'transport', 'coefficients', 'to', 'the', 'magnetic', 'field', 'the', 'effects', 'of', 'the', 'latter', 'are', 'considered', 'both', 'from', 'a', 'direct', 'as', 'indirect', 'medium', 'viewpoint', 'as', 'expected', 'we', 'find', 'a', 'magnetic', 'field', 'induced', 'anisotropic', 'diffusion', 'with', 'a', 'stronger', 'diffusion', 'in', 'the', 'longitudinal', 'direction', 'compared', 'to', 'the', 'transversal', 'one', 'we', 'backup', 'at', 'least', 'qualitatively', 'our', 'findings', 'with', 'a', 'hanging', 'string', 'analysis', 'of', 'heavy', 'quark', 'diffusion', 'in', 'a', 'magnetic', 'field', 'from', 'the', 'quark', 'number', 'susceptibility', 'we', 'can', 'extract', 'an', 'estimate', 'for', 'the', 'effective', 'deconfinement', 'temperature', 'in', 'the', 'heavy', 'quark', 'sector', 'reporting', 'consistency', 'with', 'the', 'phenomenon', 'of', 'inverse', 'magnetic', 'catalysis']] | [-0.11579206067630474, 0.21956278956572264, -0.0760781856609837, 0.05016517797895872, -0.10566864152822425, -0.06534660040017437, 0.05786075323053143, 0.3342014133656288, -0.23591024953159778, -0.2876482601551449, 0.019855726753388914, -0.28662159488243666, -0.07843703612281173, 0.13817670999286585, 0.051379806038868776, 0.04294757711742183, -0.007747852042153039, 0.06478320888298399, -0.051825376630158106, -0.2061050345244653, 0.3038718328208608, 0.028339141927255482, 0.2665399994098527, 0.1328510751536883, 0.03833941656219609, 0.042663330050623595, -0.01737785872674602, 0.04618656598031521, -0.1304240707153975, 0.0613984973553349, 0.15531454734257696, -0.013476679535747013, 0.1785284907940556, -0.4305749995853094, -0.2274384459206725, 0.06542645952499965, 0.12196606432416421, 0.16502736823441572, -0.06892025073688915, -0.2714636016993181, 0.05511202803840313, -0.17285364272401613, -0.15045929236323846, -0.0996602447141948, -0.012082402307458003, -0.013920817160910435, -0.3216140589539838, 0.11561302344557857, 0.005399964845684522, 0.06421711154775146, -0.06534477694487363, -0.1455936576184981, -0.02312434681910364, 0.049940576627576616, 0.13615585230838725, 0.09434552327318883, 0.16164859261308961, -0.19753960706293583, -0.13086154867401895, 0.36293927343452675, -0.10984000501373564, -0.174295200961077, 0.16371795900494737, -0.18043625017915688, -0.09303568880457212, 0.10502670015044072, 0.2102402772754431, 0.12518812434761512, -0.17540918569874894, 0.08123761368299122, -0.05289244906607029, 0.13544769057565753, 0.04835088111268466, 0.011178094060981974, 0.22395107106250875, 0.17616439394940459, -0.01604915813762037, 0.12375588604413411, -0.08773844987154007, -0.0790757502648322, -0.33125869619714865, -0.1409457378253779, -0.13640990939593928, 0.0808203309562112, -0.12135501515894087, -0.1740752214291955, 0.4059923393925762, 0.1825853853205284, 0.22731952098975478, -0.03516818530419293, 0.29455318411483483, 0.11752372916020891, 0.046982979621765585, 0.10814958953243844, 0.26726027892025955, 0.22763483854942024, 0.1947920481208712, -0.3213645365458968, 0.014159711307900794, 0.08614675540696172] |
1,802.02806 | 3D Current Algebra and Twisted K Theory | Equivariant twisted K theory classes on compact Lie groups $G$ can be
realized as families of Fredholm operators acting in a tensor product of a
fermionic Fock space and a representation space of a central extension of the
loop algebra $LG$ using a supersymmetric Wess-Zumino-Witten model. The aim of
the present article is to extend the construction to higher loop algebras using
an abelian extension of a $3D$ current algebra. We have only partial success:
Instead of true Fredholm operators we have formal algebraic expressions in
terms of the generators of the current algebra and an infinite dimensional
Clifford algebra. These give rise to sesquilinear forms in a Hilbert bundle
which transform in the expected way with respect to $3D$ gauge transformations
but do not define true Hilbert space operators.
| math-ph math.KT math.MP math.RT | equivariant twisted k theory classes on compact lie groups g can be realized as families of fredholm operators acting in a tensor product of a fermionic fock space and a representation space of a central extension of the loop algebra lg using a supersymmetric wesszuminowitten model the aim of the present article is to extend the construction to higher loop algebras using an abelian extension of a 3d current algebra we have only partial success instead of true fredholm operators we have formal algebraic expressions in terms of the generators of the current algebra and an infinite dimensional clifford algebra these give rise to sesquilinear forms in a hilbert bundle which transform in the expected way with respect to 3d gauge transformations but do not define true hilbert space operators | [['equivariant', 'twisted', 'k', 'theory', 'classes', 'on', 'compact', 'lie', 'groups', 'g', 'can', 'be', 'realized', 'as', 'families', 'of', 'fredholm', 'operators', 'acting', 'in', 'a', 'tensor', 'product', 'of', 'a', 'fermionic', 'fock', 'space', 'and', 'a', 'representation', 'space', 'of', 'a', 'central', 'extension', 'of', 'the', 'loop', 'algebra', 'lg', 'using', 'a', 'supersymmetric', 'wesszuminowitten', 'model', 'the', 'aim', 'of', 'the', 'present', 'article', 'is', 'to', 'extend', 'the', 'construction', 'to', 'higher', 'loop', 'algebras', 'using', 'an', 'abelian', 'extension', 'of', 'a', '3d', 'current', 'algebra', 'we', 'have', 'only', 'partial', 'success', 'instead', 'of', 'true', 'fredholm', 'operators', 'we', 'have', 'formal', 'algebraic', 'expressions', 'in', 'terms', 'of', 'the', 'generators', 'of', 'the', 'current', 'algebra', 'and', 'an', 'infinite', 'dimensional', 'clifford', 'algebra', 'these', 'give', 'rise', 'to', 'sesquilinear', 'forms', 'in', 'a', 'hilbert', 'bundle', 'which', 'transform', 'in', 'the', 'expected', 'way', 'with', 'respect', 'to', '3d', 'gauge', 'transformations', 'but', 'do', 'not', 'define', 'true', 'hilbert', 'space', 'operators']] | [-0.14711366431393588, 0.1128854320476351, -0.07582971192717265, 0.08715865486391032, -0.14339414665726227, -0.10735418162881755, -0.03780807924116603, 0.3506715314749342, -0.28241213316527697, -0.21609713172835585, 0.1236983136470931, -0.212046150641086, -0.1585006159157134, 0.1630338142831953, -0.12649140545310308, -0.013508378975809766, 0.02908311581525665, 0.12672904792886514, -0.18080173179757997, -0.2442795997948941, 0.42785492728177743, 0.0042916205550472325, 0.22357739487376352, -0.02419217496823806, 0.12697134264386617, 0.009417204942124394, -0.02695817915866008, -0.037954612753954, -0.07691080186587687, 0.1746325970394537, 0.3063421382031475, 0.0539953017858072, 0.187414252715042, -0.4244387493397181, -0.14615261443832422, 0.17957100060840064, 0.17336969164629967, 0.02275914677615779, -0.0024677167118240433, -0.2935583250525479, 0.02115366657694372, -0.2557756486707009, -0.13558126440576207, -0.12107630038920503, 0.033103499103050965, -0.07818250860302495, -0.2565703799912276, -0.003762617875606968, 0.06792378908811281, 0.11100086639456164, -0.08976777171528039, -0.060956186619408145, -0.07752936381864577, 0.06811705427960707, -0.06668655281581988, 0.058663043476497895, 0.11974102211757921, -0.0935560400945318, -0.17620958631070188, 0.3577815850892176, -0.07634322368002568, -0.2755215866527019, 0.1259341008011968, -0.1870258053782611, -0.1687720235204324, 0.08957172818123721, 0.1235656020589746, 0.13265573686132065, -0.06496928834284728, 0.22975508524373603, -0.12575755319916285, 0.062149147123384936, 0.04478938318968106, 0.049908346704279, 0.14844729741677068, 0.07572558052981129, 0.07778096941765397, 0.13225056763577203, 0.06141584189071392, -0.07202211152045773, -0.39933316866652324, -0.23583233059012296, -0.10403675433391561, 0.11286041417994196, -0.0989361412742605, -0.20519206173037394, 0.4247259893848632, 0.11665801642453656, 0.19638645654015888, 0.09933696123144518, 0.2073827690856818, 0.1598414049600251, 0.14719887372965995, 0.031196202585348286, 0.11379468510142313, 0.2398829159255211, 0.0064670956371208795, -0.1280940349930181, -0.08351950685251862, 0.2422518884548201] |
1,802.02807 | Classical evolution in quantum systems | We investigate quantum effects in the evolution of general systems. For
studying such temporal quantum phenomena, it is paramount to have a rigorous
concept and profound understanding of the classical dynamics in such a system
in the first place. For this reason, we derive from first principles equations
of motions that describe the classical propagation in quantum systems. A
comparison of this classical model with the actual temporal quantum behavior
enables us to identify quantum phenomena in the system's dynamics and
distinguish them from static quantum features at individual points in time. For
instance, we show how Newton's second law emerges as a special case of our
general treatment, connecting it to a Schr\"odinger-type equation. As
applications of our universal technique, we analyze nonlinear optical
processes, semiclassical models, and the multipartite entanglement dynamics of
macroscopic ensembles.
| quant-ph | we investigate quantum effects in the evolution of general systems for studying such temporal quantum phenomena it is paramount to have a rigorous concept and profound understanding of the classical dynamics in such a system in the first place for this reason we derive from first principles equations of motions that describe the classical propagation in quantum systems a comparison of this classical model with the actual temporal quantum behavior enables us to identify quantum phenomena in the systems dynamics and distinguish them from static quantum features at individual points in time for instance we show how newtons second law emerges as a special case of our general treatment connecting it to a schrodingertype equation as applications of our universal technique we analyze nonlinear optical processes semiclassical models and the multipartite entanglement dynamics of macroscopic ensembles | [['we', 'investigate', 'quantum', 'effects', 'in', 'the', 'evolution', 'of', 'general', 'systems', 'for', 'studying', 'such', 'temporal', 'quantum', 'phenomena', 'it', 'is', 'paramount', 'to', 'have', 'a', 'rigorous', 'concept', 'and', 'profound', 'understanding', 'of', 'the', 'classical', 'dynamics', 'in', 'such', 'a', 'system', 'in', 'the', 'first', 'place', 'for', 'this', 'reason', 'we', 'derive', 'from', 'first', 'principles', 'equations', 'of', 'motions', 'that', 'describe', 'the', 'classical', 'propagation', 'in', 'quantum', 'systems', 'a', 'comparison', 'of', 'this', 'classical', 'model', 'with', 'the', 'actual', 'temporal', 'quantum', 'behavior', 'enables', 'us', 'to', 'identify', 'quantum', 'phenomena', 'in', 'the', 'systems', 'dynamics', 'and', 'distinguish', 'them', 'from', 'static', 'quantum', 'features', 'at', 'individual', 'points', 'in', 'time', 'for', 'instance', 'we', 'show', 'how', 'newtons', 'second', 'law', 'emerges', 'as', 'a', 'special', 'case', 'of', 'our', 'general', 'treatment', 'connecting', 'it', 'to', 'a', 'schrodingertype', 'equation', 'as', 'applications', 'of', 'our', 'universal', 'technique', 'we', 'analyze', 'nonlinear', 'optical', 'processes', 'semiclassical', 'models', 'and', 'the', 'multipartite', 'entanglement', 'dynamics', 'of', 'macroscopic', 'ensembles']] | [-0.10918344664969482, 0.10359247475314666, -0.1371960064108648, 0.10465924272070612, -0.03825786489281146, -0.13826217530089813, 0.033044338431757164, 0.3040968961397405, -0.29823255726403336, -0.27221839192926006, 0.042997169278404565, -0.25831264045315466, -0.22401881962672204, 0.22305032720118212, -0.01880927909138229, 0.09674414018552531, 0.036166650804636234, 0.027700662186629522, -0.043374767686199286, -0.17044327093069167, 0.31553738905623663, 0.01661389523959609, 0.2813907902523437, 0.03260278409031932, 0.11506141160327174, 0.021414996043056495, 0.005085166564266033, 0.021878367166637498, -0.13668086736571936, 0.09155404957367436, 0.2504343986043911, 0.10576398180017028, 0.2800515257335706, -0.45100587872130904, -0.28533023238346417, 0.07725943280520904, 0.09441044018603861, 0.20952099486021325, -0.023486561470610255, -0.28829106069957455, 0.03175523050509475, -0.14149967497146196, -0.1765925319837954, -0.10639794178132433, 0.029414805566535935, 0.004217070635230116, -0.19719210080631241, 0.09147056258456467, 0.10008689971222981, 0.038729216054301054, -0.03835530894781079, -0.001784269668004366, 0.07134345946285654, 0.18643956119537025, -0.03701391122184064, -0.05941214487863951, 0.09772356188691714, -0.142992433061248, -0.1753519011031398, 0.4467060502947253, -0.042747852065504584, -0.1769184865646393, 0.21652674647253556, -0.14903232722388246, -0.16500180693658287, 0.03012928541540853, 0.21800053739571013, 0.14248404203793624, -0.1643944546162589, 0.0640532808324411, 0.0054100992137511425, 0.15098318141715883, 0.007658626574351836, 0.0984580254444154, 0.22041000751008089, 0.16802501999978525, 0.02050036798327175, 0.16096109672156778, -0.03359562518979895, -0.2215448855114279, -0.31028893233879523, -0.19680663153036115, -0.14791261234067327, 0.11053829928106793, -0.08531237981825303, -0.16380600768196232, 0.4035657232469769, 0.20076862083420993, 0.1669904193327324, 0.02564932288334924, 0.27835805883275017, 0.14817921615630278, 0.02548499345806811, 0.040666772368507846, 0.24965401088325856, 0.15391551245086113, 0.12788200214751722, -0.24422796554063098, 0.030927517691024524, 0.0649145066340947] |
1,802.02808 | Variance estimates for random disc-polygons in smooth convex discs | In this paper we prove asymptotic upper bounds on the variance of the number
of vertices and missed area of inscribed random disc-polygons in smooth convex
discs whose boundary is $C^2_+$. We also consider a circumscribed variant of
this probability model in which the convex disc is approximated by the
intersection of random circles.
| math.MG | in this paper we prove asymptotic upper bounds on the variance of the number of vertices and missed area of inscribed random discpolygons in smooth convex discs whose boundary is c2_ we also consider a circumscribed variant of this probability model in which the convex disc is approximated by the intersection of random circles | [['in', 'this', 'paper', 'we', 'prove', 'asymptotic', 'upper', 'bounds', 'on', 'the', 'variance', 'of', 'the', 'number', 'of', 'vertices', 'and', 'missed', 'area', 'of', 'inscribed', 'random', 'discpolygons', 'in', 'smooth', 'convex', 'discs', 'whose', 'boundary', 'is', 'c2_', 'we', 'also', 'consider', 'a', 'circumscribed', 'variant', 'of', 'this', 'probability', 'model', 'in', 'which', 'the', 'convex', 'disc', 'is', 'approximated', 'by', 'the', 'intersection', 'of', 'random', 'circles']] | [-0.15585021004256494, 0.08539782431117206, -0.07169174703435516, 0.05314796997831678, -0.036876088992323516, -0.10042963343022286, 0.08398774197931348, 0.3313214015039914, -0.25067562634511936, -0.22794775490842337, 0.14554365924867047, -0.2840402665600743, -0.15852959809016506, 0.1513934197246958, -0.19810745466219368, 0.08460210810222153, 0.022698950659448526, 0.043915108180130426, -0.017396982697734854, -0.3174412667022069, 0.31745653689997094, -0.0615202313253902, 0.1520304170279008, 0.05576272755158397, 0.07746240795581197, 0.021637028996955673, -0.008055390754960617, 0.08869571899468044, -0.2077503591459596, 0.16566698155629467, 0.21676978196527036, 0.1284096737453749, 0.28814975156466355, -0.4204574319410999, -0.14282984076120522, 0.17868924295564867, 0.18517850936864907, 0.002699215516430449, -0.008851066168028651, -0.21298965295108985, 0.08517608560955608, -0.09463134314864874, -0.18820950351128318, 0.0527823519242822, 0.004958188407263666, 0.04257026493971078, -0.26143063713778864, 0.03936572208998391, 0.14497290498946072, 0.06818005050266741, -0.03256871498558881, -0.11808658496670003, -0.004100450437586263, 0.012392864720720166, 0.05345272597470233, 0.07070864582399153, 0.09995408727840152, -0.06931357977490099, -0.08539242650610658, 0.3225079836007559, -0.045058290087530074, -0.25896379375338274, 0.09588433308351152, -0.20675921063202451, -0.1323375358127655, 0.12662730821109605, 0.23552342272310886, 0.18220782195622065, -0.12275402934975782, 0.1681916723895449, -0.14976138990363633, 0.07938903689665615, 0.13905196838994632, -0.006359539495535054, 0.19008407942107264, 0.12272750805922837, 0.17385155047764475, 0.22817956006048984, -0.08850850899405074, -0.10791265634152125, -0.327310223993406, -0.12262033751093836, -0.26910015144209676, 0.05227170065748242, -0.175973747513984, -0.23901834500347316, 0.36139914035832266, 0.03979710155641133, 0.24050528492848827, 0.1610827646152345, 0.2963963566383101, 0.10426355042617838, -0.010387820999999091, 0.14457198231973034, 0.19779679184463225, 0.1210752440976717, -0.05067674452790393, -0.1542849712082589, 0.08387357809246992, 0.16437511244472466] |
1,802.02809 | Qualitative properties of singular solutions to semilinear elliptic
problems | We consider positive singular solutions to semilinear elliptic problems with
possibly singular nonlinearity. We deduce symmetry and monotonicity properties
of the solutions via the moving plane procedure.
| math.AP | we consider positive singular solutions to semilinear elliptic problems with possibly singular nonlinearity we deduce symmetry and monotonicity properties of the solutions via the moving plane procedure | [['we', 'consider', 'positive', 'singular', 'solutions', 'to', 'semilinear', 'elliptic', 'problems', 'with', 'possibly', 'singular', 'nonlinearity', 'we', 'deduce', 'symmetry', 'and', 'monotonicity', 'properties', 'of', 'the', 'solutions', 'via', 'the', 'moving', 'plane', 'procedure']] | [-0.23443942247993416, -0.016094021637130668, -0.0682795783849778, 0.04097320391210141, -0.20353097282350063, -0.20536771768497097, -0.03169337063014542, 0.28601555305498616, -0.3562190427824303, -0.17684495021347646, 0.1889012685407781, -0.38477685468064415, -0.125353855115396, 0.17990823738552905, -0.05580115132033825, 0.17554812540334683, 0.06245675138025372, -0.019273485367496807, -0.14654809088204745, -0.21409205768981743, 0.47783649574827264, -0.1630136858395956, 0.1890479148262077, 0.03559453269742705, 0.13560416373527712, 0.016588993956921278, 0.03620618961199566, 0.0054036022370888125, -0.22227744195886232, 0.09647737678002428, 0.2547130788055559, 0.029159796872624644, 0.25328017467701874, -0.4166455238505646, -0.21325488357494274, 0.2025376064357934, 0.09671424039536053, 0.10104022019853194, -0.061743344013208384, -0.303494853829896, 0.10295616925901009, -0.06326732805205716, -0.3402819372713566, -0.07100154568993107, -0.03126193734782713, 0.106939730544885, -0.29354202947406854, 0.14531531378074927, 0.08553923390529773, 0.05594647068668295, -0.15120922360155317, -0.03775963614936228, -0.01874566426569665, -0.020662501385366475, 0.13986060798978778, -0.07706523185199196, 0.034516801803234826, -0.10464899207430857, -0.08768963496442195, 0.340636496587346, -0.051123701656858124, -0.3144501167590971, 0.13050659842513226, -0.1163315526727173, -0.10382626830013814, 0.12086099588001768, 0.22625831638773283, 0.2340890794509539, -0.06778919044882059, 0.14561983635778436, -0.03288317126808343, 0.09058219384126089, 0.1213355794273041, -0.03002732340246439, 0.08681602513900509, 0.009352546875123624, 0.2214226588882782, 0.20860229135939368, 0.032015551140324935, -0.10573884824946246, -0.3425666568455873, -0.08670604239321417, -0.04181074615378209, 0.14099404615936456, -0.16787646398653225, -0.2602038936758483, 0.3755330642064412, 0.07877133783228972, 0.19361996602405002, 0.07577994439526703, 0.19955098208177974, 0.2432243166560376, -0.03072451105065368, 0.06141776632931498, 0.1839395437941507, 0.1815827406115002, 0.13593397775871885, -0.2458321970232107, -0.005255671338764606, 0.21456899604311697] |
1,802.0281 | Potential Energy Landscape of TIP4P/2005 water | We report an exhaustive numerical study of the statistical properties of the
potential energy landscape of TIP4P/2005, one of the most accurate rigid water
models. We show that, in the region where equilibrated configurations can be
generated, a Gaussian landscape description is able to properly describe the
model properties. We also find that the volume dependence of the landscape
properties is consistent with the existence of a locus of density maxima in the
phase diagram. The landscape-based equation of state accurately reproduces the
TIP4P/2005 pressure-vs-volume curves, providing a sound extrapolation of the
free-energy at low T. A positive-pressure liquid-liquid critical point is
predicted by the resulting free-energy.
| cond-mat.stat-mech | we report an exhaustive numerical study of the statistical properties of the potential energy landscape of tip4p2005 one of the most accurate rigid water models we show that in the region where equilibrated configurations can be generated a gaussian landscape description is able to properly describe the model properties we also find that the volume dependence of the landscape properties is consistent with the existence of a locus of density maxima in the phase diagram the landscapebased equation of state accurately reproduces the tip4p2005 pressurevsvolume curves providing a sound extrapolation of the freeenergy at low t a positivepressure liquidliquid critical point is predicted by the resulting freeenergy | [['we', 'report', 'an', 'exhaustive', 'numerical', 'study', 'of', 'the', 'statistical', 'properties', 'of', 'the', 'potential', 'energy', 'landscape', 'of', 'tip4p2005', 'one', 'of', 'the', 'most', 'accurate', 'rigid', 'water', 'models', 'we', 'show', 'that', 'in', 'the', 'region', 'where', 'equilibrated', 'configurations', 'can', 'be', 'generated', 'a', 'gaussian', 'landscape', 'description', 'is', 'able', 'to', 'properly', 'describe', 'the', 'model', 'properties', 'we', 'also', 'find', 'that', 'the', 'volume', 'dependence', 'of', 'the', 'landscape', 'properties', 'is', 'consistent', 'with', 'the', 'existence', 'of', 'a', 'locus', 'of', 'density', 'maxima', 'in', 'the', 'phase', 'diagram', 'the', 'landscapebased', 'equation', 'of', 'state', 'accurately', 'reproduces', 'the', 'tip4p2005', 'pressurevsvolume', 'curves', 'providing', 'a', 'sound', 'extrapolation', 'of', 'the', 'freeenergy', 'at', 'low', 't', 'a', 'positivepressure', 'liquidliquid', 'critical', 'point', 'is', 'predicted', 'by', 'the', 'resulting', 'freeenergy']] | [-0.11183961652928874, 0.12929546686590626, -0.16573932922800028, 0.07655039498737702, -0.006275877567185532, -0.062493606022603454, 0.06902237639629415, 0.3359279021798145, -0.2367931868049449, -0.2828045319943201, 0.05183417248273534, -0.28708743406903175, -0.15154490842528287, 0.1557803515145289, -0.0004455279849935323, 0.04319177215941073, 0.033335309345940395, 0.037989118615431444, -0.07753826458716677, -0.18434378359289397, 0.2753911345421026, 0.05796030003222681, 0.2825405420646781, 0.07133642684535256, 0.0890893398917147, -0.04499593843883347, 0.04690725406897919, 0.04643213208764792, -0.21436804879437357, 0.0975715388809996, 0.23223429850148108, 0.06242144742891902, 0.19247214153763795, -0.37938497126812026, -0.2678600057870859, 0.13269894568781768, 0.10621574926411821, 0.1295714447718291, -0.04451585906956877, -0.2146262659114741, 0.08581980767526796, -0.11188957557259571, -0.21750482976591837, -0.10229050122378837, -0.008021537485044626, 0.0692856578222875, -0.21799546300566622, 0.12025841729732097, -0.0014966536341013297, 0.06965467213165193, -0.10277878052466327, -0.09348486641510612, -0.09455405880830117, 0.0983438735029527, 0.01646878973780466, 0.032306965815258167, 0.1561162679101385, -0.1856059551771198, -0.04594709837277021, 0.3794571447319218, -0.06849636567667836, -0.15835975479511988, 0.17857550725873028, -0.1473079740424596, -0.10459944775682829, 0.1964200422478219, 0.10339944895268197, 0.12108069136295291, -0.15165463750294986, 0.09825480206719865, -0.015188656948018997, 0.18637950757568303, 0.0018361667681130625, -0.03813079137443787, 0.2296113471788842, 0.21336961599022505, 0.030687274641933895, 0.1644896191894077, -0.11078414654004431, -0.1570196037269419, -0.34224905967712405, -0.14482802652983948, -0.1732949150471194, -0.0069536302016959305, -0.09500442128628492, -0.2103139755471299, 0.42797394126121485, 0.13950372183074553, 0.21819307616069203, 0.058938879466482574, 0.25567203580534886, 0.10184613459167026, -0.006653479329266009, 0.06509386524336323, 0.23770718688056583, 0.10004691955456067, 0.05089659225639133, -0.2498356151084105, 0.07293024322550212, 0.0677118044989627] |
1,802.02811 | First-principles study of the thermoelectric properties of quaternary
tetradymite BiSbSeTe2 | The electronic and phonon transport properties of quaternary tetradymite
BiSbSeTe2 are investigated using first-principles approach and Boltzmann
transport theory. Unlike the binary counterpart Bi2Te3, we obtain a pair of
Rashba splitting bands induced by the absence of inversion center. Such unique
characteristic could lead to a large Seebeck coefficient even at relatively
higher carrier concentration. Besides, we find an ultralow lattice thermal
conductivity of BiSbSeTe2, especially along the interlayer direction, which can
be traced to the extremely small phonon relaxation time mainly induced by the
mixed covalent bonds. As a consequence, a considerably large ZT value of ~2.0
can be obtained at 500 K, indicating that the unique lattice structure of
BiSbSeTe2 caused by isoelectronic substitution could be an advantage to
achieving high thermoelectric performance.
| cond-mat.mtrl-sci | the electronic and phonon transport properties of quaternary tetradymite bisbsete2 are investigated using firstprinciples approach and boltzmann transport theory unlike the binary counterpart bi2te3 we obtain a pair of rashba splitting bands induced by the absence of inversion center such unique characteristic could lead to a large seebeck coefficient even at relatively higher carrier concentration besides we find an ultralow lattice thermal conductivity of bisbsete2 especially along the interlayer direction which can be traced to the extremely small phonon relaxation time mainly induced by the mixed covalent bonds as a consequence a considerably large zt value of 20 can be obtained at 500 k indicating that the unique lattice structure of bisbsete2 caused by isoelectronic substitution could be an advantage to achieving high thermoelectric performance | [['the', 'electronic', 'and', 'phonon', 'transport', 'properties', 'of', 'quaternary', 'tetradymite', 'bisbsete2', 'are', 'investigated', 'using', 'firstprinciples', 'approach', 'and', 'boltzmann', 'transport', 'theory', 'unlike', 'the', 'binary', 'counterpart', 'bi2te3', 'we', 'obtain', 'a', 'pair', 'of', 'rashba', 'splitting', 'bands', 'induced', 'by', 'the', 'absence', 'of', 'inversion', 'center', 'such', 'unique', 'characteristic', 'could', 'lead', 'to', 'a', 'large', 'seebeck', 'coefficient', 'even', 'at', 'relatively', 'higher', 'carrier', 'concentration', 'besides', 'we', 'find', 'an', 'ultralow', 'lattice', 'thermal', 'conductivity', 'of', 'bisbsete2', 'especially', 'along', 'the', 'interlayer', 'direction', 'which', 'can', 'be', 'traced', 'to', 'the', 'extremely', 'small', 'phonon', 'relaxation', 'time', 'mainly', 'induced', 'by', 'the', 'mixed', 'covalent', 'bonds', 'as', 'a', 'consequence', 'a', 'considerably', 'large', 'zt', 'value', 'of', '20', 'can', 'be', 'obtained', 'at', '500', 'k', 'indicating', 'that', 'the', 'unique', 'lattice', 'structure', 'of', 'bisbsete2', 'caused', 'by', 'isoelectronic', 'substitution', 'could', 'be', 'an', 'advantage', 'to', 'achieving', 'high', 'thermoelectric', 'performance']] | [-0.16848190595209597, 0.17904827845026738, -0.042606845319271086, 0.0020835312623530625, -0.05873491476848722, -0.14938639276474713, 0.09819479795079679, 0.4000698122829199, -0.35947924946248533, -0.27113679208699615, 0.02665184180345386, -0.30100747089087965, -0.11632162474095821, 0.2039559215605259, 0.03959164978004992, -0.010330738501623273, 0.0332494481112808, -0.06476983845792711, -0.1033474047780037, -0.21445373099762946, 0.21788213647529484, 0.09860189704224467, 0.3054550142884254, 0.11461596664227545, 0.05209196919202805, -0.0018648552484810351, 0.09786482396349311, 0.08964470516890287, -0.1070799923602608, 0.10769166615139693, 0.2610939869675785, -0.11382569868676365, 0.205067564079538, -0.4008610509415157, -0.2093919645100832, 0.011878121731802822, 0.12474455960653723, 0.15166599472705275, -0.07711691157519818, -0.21703063022065908, 0.13207326147798448, -0.16913728166557848, -0.11499626932688989, -0.1122986301961355, -0.023795078998431564, -0.017376566119492055, -0.23517585288593545, 0.11437240764312447, 0.04001406121812761, 0.1052842704579234, -0.08304289652034641, -0.20800605518370865, -0.0845672666952014, 0.04226007317751646, 0.04466704278439283, 0.028331595364958048, 0.16882257833471523, -0.11196579128876329, -0.08491707787942142, 0.41147893327474594, -0.1285485738804564, -0.09163382858037948, 0.17467423985153438, -0.15971256790682672, -0.054426241151988505, 0.20790460478886963, 0.10496092659235001, 0.09709701313078403, -0.15194968174246606, 0.05666503249015659, 0.015771964051993565, 0.1633135469239205, 0.09182839256152511, 0.11259915986657143, 0.2329217049088329, 0.14106725193560124, 0.05657852459326387, 0.13512400068808347, -0.12259468536823988, -0.014566173506900669, -0.16702085668593644, -0.17579927219823002, -0.23366236068308355, 0.15199906808882951, -0.11153147443779744, -0.15163172148447485, 0.3683576169833541, 0.08992337168380618, 0.18979632019810377, -0.025974327935837208, 0.18296184856444597, 0.1655395103218034, 0.10629370787739753, 0.03509248955082148, 0.22720232516201214, 0.1604934543184936, 0.06850092617422342, -0.3164139118492603, 0.1125228473842144, 0.0155169060472399] |
1,802.02812 | Real part of $pp$ scattering amplitude in Additive Quark Model at LHC
energies | Elastic $pp$ scattering at LHC energies is treated in Additive Quark Model
together with Pomeron exchange theory. The obtained results are compared with
the new experimental data on the ratio of real to imaginary part of the
scattering amplitude at the small transverse momenta
| hep-ph | elastic pp scattering at lhc energies is treated in additive quark model together with pomeron exchange theory the obtained results are compared with the new experimental data on the ratio of real to imaginary part of the scattering amplitude at the small transverse momenta | [['elastic', 'pp', 'scattering', 'at', 'lhc', 'energies', 'is', 'treated', 'in', 'additive', 'quark', 'model', 'together', 'with', 'pomeron', 'exchange', 'theory', 'the', 'obtained', 'results', 'are', 'compared', 'with', 'the', 'new', 'experimental', 'data', 'on', 'the', 'ratio', 'of', 'real', 'to', 'imaginary', 'part', 'of', 'the', 'scattering', 'amplitude', 'at', 'the', 'small', 'transverse', 'momenta']] | [-0.1128266225357286, 0.21834249194415117, -0.10078043014403772, 0.09382474258679642, -0.03604273282160813, -0.09834698177027432, -0.02142135530382141, 0.3472620721387846, -0.23008372544691982, -0.2681177352047102, -0.03751394956171597, -0.3803690643981099, -0.011504168865609576, 0.1724770687128925, 0.08939660260115158, 0.08022711610167542, 0.11280234423677692, 0.043576114758087155, 0.002334791955284097, -0.237031981729987, 0.3118466066768054, 0.06357702828774398, 0.2338082592786205, 0.14643882799216293, 0.06114328697334382, 0.1444808050503277, -0.061481309779496354, -0.03713457633487203, -0.07336142199875956, 0.08132221235428005, 0.2750991878922584, -0.08929841792930594, 0.08447430423058738, -0.3868188858455555, -0.10077957723776555, 0.032375025753439826, 0.09873550654579462, 0.11319509900005703, 0.018085528622825885, -0.2697166765574366, 0.07859516452828591, -0.17957953564738008, -0.16138344651765443, -0.06485981695269319, -0.020956551328047433, -0.014984038404443047, -0.31895505128936336, 0.10787129854063758, -0.09242234429852529, 0.051404547157951376, -0.10896097179713914, -0.24695105327885936, -0.06438522386385805, 0.006366089452058077, 0.14001626091935163, 0.08532205428028564, 0.13358224458484488, -0.1452264199350876, -0.14511047168211502, 0.3479746394706043, -0.0458186554976485, -0.17796672713434833, 0.17135365346488965, -0.18674109689891338, -0.08412308445919982, 0.2022230000319806, 0.23490115236067635, 0.024429010682400654, -0.13118635977364398, 0.16319455015896397, 0.016871571453521028, 0.14471471783789722, 0.09698537278878079, 0.013452589334602553, 0.14288140545514497, 0.18481645148924805, -0.07445607776753604, 0.09971233952092007, -0.10527778169754046, -0.11757244319993664, -0.4252001222392375, 0.0025737108768556605, -0.18559490143988197, 0.022350411481139334, -0.12259917332663793, -0.11037493818862872, 0.3079565950161354, 0.0684965596195649, 0.27795111849396065, 0.06928187265822833, 0.35927672241814435, 0.1610189810056578, 0.09964355441148985, 0.03859113610815257, 0.3080599671018056, 0.18880839925259352, 0.20420925166796555, -0.24935092871204356, 0.006252845220098441, 0.028662767293016343] |
1,802.02813 | Archetypal Analysis for Sparse Representation-based Hyperspectral
Sub-pixel Quantification | The estimation of land cover fractions from remote sensing images is a
frequently used indicator of the environmental quality. This paper focuses on
the quantification of land cover fractions in an urban area of Berlin, Germany,
using simulated hyperspectral EnMAP data with a spatial resolution of
30m$\times$30m. We use constrained sparse representation, where each pixel with
unknown surface characteristics is expressed by a weighted linear combination
of elementary spectra with known land cover class. We automatically determine
the elementary spectra from image reference data using archetypal analysis by
simplex volume maximization, and combine it with reversible jump Markov chain
Monte Carlo method. In our experiments, the estimation of the automatically
derived elementary spectra is compared to the estimation obtained by a manually
designed spectral library by means of reconstruction error, mean absolute error
of the fraction estimates, sum of fractions, $R^2$, and the number of used
elementary spectra. The experiments show that a collection of archetypes can be
an adequate and efficient alternative to the manually designed spectral library
with respect to the mentioned criteria.
| cs.CV | the estimation of land cover fractions from remote sensing images is a frequently used indicator of the environmental quality this paper focuses on the quantification of land cover fractions in an urban area of berlin germany using simulated hyperspectral enmap data with a spatial resolution of 30mtimes30m we use constrained sparse representation where each pixel with unknown surface characteristics is expressed by a weighted linear combination of elementary spectra with known land cover class we automatically determine the elementary spectra from image reference data using archetypal analysis by simplex volume maximization and combine it with reversible jump markov chain monte carlo method in our experiments the estimation of the automatically derived elementary spectra is compared to the estimation obtained by a manually designed spectral library by means of reconstruction error mean absolute error of the fraction estimates sum of fractions r2 and the number of used elementary spectra the experiments show that a collection of archetypes can be an adequate and efficient alternative to the manually designed spectral library with respect to the mentioned criteria | [['the', 'estimation', 'of', 'land', 'cover', 'fractions', 'from', 'remote', 'sensing', 'images', 'is', 'a', 'frequently', 'used', 'indicator', 'of', 'the', 'environmental', 'quality', 'this', 'paper', 'focuses', 'on', 'the', 'quantification', 'of', 'land', 'cover', 'fractions', 'in', 'an', 'urban', 'area', 'of', 'berlin', 'germany', 'using', 'simulated', 'hyperspectral', 'enmap', 'data', 'with', 'a', 'spatial', 'resolution', 'of', '30mtimes30m', 'we', 'use', 'constrained', 'sparse', 'representation', 'where', 'each', 'pixel', 'with', 'unknown', 'surface', 'characteristics', 'is', 'expressed', 'by', 'a', 'weighted', 'linear', 'combination', 'of', 'elementary', 'spectra', 'with', 'known', 'land', 'cover', 'class', 'we', 'automatically', 'determine', 'the', 'elementary', 'spectra', 'from', 'image', 'reference', 'data', 'using', 'archetypal', 'analysis', 'by', 'simplex', 'volume', 'maximization', 'and', 'combine', 'it', 'with', 'reversible', 'jump', 'markov', 'chain', 'monte', 'carlo', 'method', 'in', 'our', 'experiments', 'the', 'estimation', 'of', 'the', 'automatically', 'derived', 'elementary', 'spectra', 'is', 'compared', 'to', 'the', 'estimation', 'obtained', 'by', 'a', 'manually', 'designed', 'spectral', 'library', 'by', 'means', 'of', 'reconstruction', 'error', 'mean', 'absolute', 'error', 'of', 'the', 'fraction', 'estimates', 'sum', 'of', 'fractions', 'r2', 'and', 'the', 'number', 'of', 'used', 'elementary', 'spectra', 'the', 'experiments', 'show', 'that', 'a', 'collection', 'of', 'archetypes', 'can', 'be', 'an', 'adequate', 'and', 'efficient', 'alternative', 'to', 'the', 'manually', 'designed', 'spectral', 'library', 'with', 'respect', 'to', 'the', 'mentioned', 'criteria']] | [-0.015487781408036968, 0.056238616645945816, -0.08141921145163175, 0.067798186849259, -0.04583032249682987, -0.09787251014596207, 0.05633450317872161, 0.40104863659150336, -0.2604739736937891, -0.3633562470695429, 0.1444861951305644, -0.2707958880144392, -0.10214867398433516, 0.21389804754373914, -0.11132515643351856, 0.09591630470132821, 0.09520656135433886, 0.029770968126596055, -0.06033592638721141, -0.23560062816334254, 0.25143553556556775, 0.06771050516322169, 0.29428503142314494, -0.03728013964049583, 0.11524877357522074, 0.04216797312054073, -0.11642813370859174, 0.030863609059977565, -0.150321147365792, 0.18597280593169047, 0.30919748299211436, 0.1729168726388376, 0.23982438368378262, -0.35294588900176604, -0.19430949850104792, 0.11249395481491127, 0.12264418459330508, 0.032166146082437536, -0.03615082428464935, -0.2874294483194375, 0.050790672088203405, -0.1579558621739398, -0.07110912578901804, -0.06402548328930285, -0.04123689114678694, 0.05838082661593839, -0.28488236566066116, 0.06289082283364081, -0.026318174975283572, 0.12677109581445253, -0.047231244306871395, -0.15264357595752948, -0.017437380855644627, 0.14416057520648304, -0.01719482648899682, -0.0006998576253458771, 0.15359797838784625, -0.08942379856568282, -0.08886291921970493, 0.3649118230099429, -0.08800251159084842, -0.20586953867183772, 0.16076934829252001, -0.1069061682005063, -0.11260677792261102, 0.19137907488543454, 0.17819507652220742, 0.12046977006049686, -0.1696776509704876, 0.05625383296579047, -0.054044870285564935, 0.19988132984716597, 0.02372808161466194, -0.015469922657216216, 0.17254489681527363, 0.17654142422989183, 0.05889599557731817, 0.15370737524761016, -0.14892051680245022, -0.041020257799547016, -0.2768320582680555, -0.13036059890469978, -0.23224211728329516, 0.009601029184528471, -0.07996931364344274, -0.17194844304040247, 0.38089964723462144, 0.1342085903095648, 0.1923140686387573, 0.06857429565915654, 0.323467847379732, 0.07516599910043051, 0.07006414814071506, 0.03438043505803957, 0.14161636530841576, 0.11119838533290484, 0.07473895811500039, -0.1967715112306716, 0.06548437829172465, 0.08210788234244666] |
1,802.02814 | The Origin of Recombining Plasma and the Detection of the Fe-K Line in
the Supernova Remnant W28 | Overionized recombining plasmas (RPs) have been discovered from a dozen of
mixed- morphology (MM) supernova remnants (SNRs). However their formation
process is still under debate. As pointed out by many previous studies, spatial
variations of plasma temperature and ionization state provide clues to
understand the physical origin of RPs. We report on a spatially resolved X-ray
spectroscopy of W28, which is one of the largest MM SNRs found in our Galaxy.
Two observations with Suzaku XIS cover the center of W28 to the northeastern
rim where the shock is interacting with molecular clouds. The X-ray spectra in
the inner regions are well reproduced by a combination of two-RP model with
different temperatures and ionization states, whereas that in northeastern rim
is explained with a single-RP model. Our discovery of the RP in the
northeastern rim suggests an effect of thermal conduction between the cloud and
hot plasma, which may be the production process of the RP. The X-ray spectrum
of the north- eastern rim also shows an excess emission of the Fe I K{\alpha}
line. The most probable process to explain the line would be inner shell
ionization of Fe in the molecular cloud by cosmic-ray particles accelerated in
W28.
| astro-ph.HE | overionized recombining plasmas rps have been discovered from a dozen of mixed morphology mm supernova remnants snrs however their formation process is still under debate as pointed out by many previous studies spatial variations of plasma temperature and ionization state provide clues to understand the physical origin of rps we report on a spatially resolved xray spectroscopy of w28 which is one of the largest mm snrs found in our galaxy two observations with suzaku xis cover the center of w28 to the northeastern rim where the shock is interacting with molecular clouds the xray spectra in the inner regions are well reproduced by a combination of tworp model with different temperatures and ionization states whereas that in northeastern rim is explained with a singlerp model our discovery of the rp in the northeastern rim suggests an effect of thermal conduction between the cloud and hot plasma which may be the production process of the rp the xray spectrum of the north eastern rim also shows an excess emission of the fe i kalpha line the most probable process to explain the line would be inner shell ionization of fe in the molecular cloud by cosmicray particles accelerated in w28 | [['overionized', 'recombining', 'plasmas', 'rps', 'have', 'been', 'discovered', 'from', 'a', 'dozen', 'of', 'mixed', 'morphology', 'mm', 'supernova', 'remnants', 'snrs', 'however', 'their', 'formation', 'process', 'is', 'still', 'under', 'debate', 'as', 'pointed', 'out', 'by', 'many', 'previous', 'studies', 'spatial', 'variations', 'of', 'plasma', 'temperature', 'and', 'ionization', 'state', 'provide', 'clues', 'to', 'understand', 'the', 'physical', 'origin', 'of', 'rps', 'we', 'report', 'on', 'a', 'spatially', 'resolved', 'xray', 'spectroscopy', 'of', 'w28', 'which', 'is', 'one', 'of', 'the', 'largest', 'mm', 'snrs', 'found', 'in', 'our', 'galaxy', 'two', 'observations', 'with', 'suzaku', 'xis', 'cover', 'the', 'center', 'of', 'w28', 'to', 'the', 'northeastern', 'rim', 'where', 'the', 'shock', 'is', 'interacting', 'with', 'molecular', 'clouds', 'the', 'xray', 'spectra', 'in', 'the', 'inner', 'regions', 'are', 'well', 'reproduced', 'by', 'a', 'combination', 'of', 'tworp', 'model', 'with', 'different', 'temperatures', 'and', 'ionization', 'states', 'whereas', 'that', 'in', 'northeastern', 'rim', 'is', 'explained', 'with', 'a', 'singlerp', 'model', 'our', 'discovery', 'of', 'the', 'rp', 'in', 'the', 'northeastern', 'rim', 'suggests', 'an', 'effect', 'of', 'thermal', 'conduction', 'between', 'the', 'cloud', 'and', 'hot', 'plasma', 'which', 'may', 'be', 'the', 'production', 'process', 'of', 'the', 'rp', 'the', 'xray', 'spectrum', 'of', 'the', 'north', 'eastern', 'rim', 'also', 'shows', 'an', 'excess', 'emission', 'of', 'the', 'fe', 'i', 'kalpha', 'line', 'the', 'most', 'probable', 'process', 'to', 'explain', 'the', 'line', 'would', 'be', 'inner', 'shell', 'ionization', 'of', 'fe', 'in', 'the', 'molecular', 'cloud', 'by', 'cosmicray', 'particles', 'accelerated', 'in', 'w28']] | [-0.05210694604973083, 0.09554051943232113, -0.06780389170491635, 0.056939793839268935, -0.043889680432833054, -0.08395893496903356, 0.025812598166404046, 0.43751799503360134, -0.23179699266341167, -0.29347103622826076, 0.05270375229883939, -0.28487432698690984, -0.011241998927987586, 0.1506567988230146, 0.028899085557445733, -0.09773153256111357, 0.04532820093586589, -0.09263149309551197, 0.008386584657898192, -0.20010390855851723, 0.28401735471502754, 0.15295611496196326, 0.1788140543033322, 0.07896370839443989, 0.032769798030700494, -0.12941213798323514, -0.04007104655811234, -0.014889637840855303, -0.07273870514307584, 0.07602463160039424, 0.21882105595292584, 0.11002977010664633, 0.20024931237496663, -0.4338008218557771, -0.2881365877457405, 0.029376523583337213, 0.22249859026068766, -0.022117809562431177, -0.031983582498717376, -0.27306642258925495, 0.0162039528756092, -0.18872623060914603, -0.21573602478490259, 0.11672990144268054, 0.012380315177774673, 0.03399019311781916, -0.199030504343241, 0.1284593194768696, -0.011626498391522527, 0.0689256432586152, -0.1245797160904704, -0.12704005378834676, -0.042814512794715064, 0.04007418423590034, 0.04844348826236915, 0.02992830202195116, 0.20756271846281985, -0.12795261232972596, -0.08545738044241914, 0.39548100436028716, -0.024655882994681973, 0.017997997253192493, 0.25110579617297973, -0.24697467426985803, -0.16765886337279973, 0.25237121760158454, 0.07755186442389256, 0.09394927950801724, -0.14265334260452425, 0.017606894631759556, -0.08565642325809658, 0.17398751603034937, 0.0589286199420446, 0.030699728927514786, 0.31653064482779514, 0.12805201951120368, 0.004965419472710258, 0.1620538700301426, -0.2564575523020455, -0.0661799352183336, -0.24913585283840545, -0.12612993363996572, -0.12815779925093543, 0.048442019465981485, -0.0879703668400209, -0.16131723797739003, 0.34138681728515136, 0.09361792086550702, 0.2292917661716917, -0.10222330776918115, 0.29312323814380276, 0.04577690107110568, 0.030326830363136274, 0.14109461380855529, 0.2950110012815908, 0.16036287870733162, 0.11266846423310162, -0.2567911828771666, 0.12613049024396172, -0.011560490409575516] |
1,802.02815 | Exotic Magnetism and Spin-Orbit Assisted Mott Insulating State in a
$3d-5d$ Double Perovskite | The magnetic structure of Ca$_2$MnReO$_6$ double perovskite is investigated
by neutron powder diffraction and bulk magnetization, showing dominant
non-collinear Mn magnetic moments [$4.35(7)$ $\mu_B$] that are orthogonally
aligned with the small Re moments [$0.22(4)$ $\mu_B$]. $Ab$-initio electronic
structure calculations show that the strong spin-orbit coupling for Re $5d$
electrons combined with a relatively modest on-site Coulomb repulsion
($U_{eff}^{Re} \gtrsim 0.6$ eV) is sufficient to render this material
insulating. This is a rare example of spin-orbit assisted Mott insulator
outside the realm of iridates, with remarkable magnetic properties.
| cond-mat.str-el | the magnetic structure of ca_2mnreo_6 double perovskite is investigated by neutron powder diffraction and bulk magnetization showing dominant noncollinear mn magnetic moments 4357 mu_b that are orthogonally aligned with the small re moments 0224 mu_b abinitio electronic structure calculations show that the strong spinorbit coupling for re 5d electrons combined with a relatively modest onsite coulomb repulsion u_effre gtrsim 06 ev is sufficient to render this material insulating this is a rare example of spinorbit assisted mott insulator outside the realm of iridates with remarkable magnetic properties | [['the', 'magnetic', 'structure', 'of', 'ca_2mnreo_6', 'double', 'perovskite', 'is', 'investigated', 'by', 'neutron', 'powder', 'diffraction', 'and', 'bulk', 'magnetization', 'showing', 'dominant', 'noncollinear', 'mn', 'magnetic', 'moments', '4357', 'mu_b', 'that', 'are', 'orthogonally', 'aligned', 'with', 'the', 'small', 're', 'moments', '0224', 'mu_b', 'abinitio', 'electronic', 'structure', 'calculations', 'show', 'that', 'the', 'strong', 'spinorbit', 'coupling', 'for', 're', '5d', 'electrons', 'combined', 'with', 'a', 'relatively', 'modest', 'onsite', 'coulomb', 'repulsion', 'u_effre', 'gtrsim', '06', 'ev', 'is', 'sufficient', 'to', 'render', 'this', 'material', 'insulating', 'this', 'is', 'a', 'rare', 'example', 'of', 'spinorbit', 'assisted', 'mott', 'insulator', 'outside', 'the', 'realm', 'of', 'iridates', 'with', 'remarkable', 'magnetic', 'properties']] | [-0.20329428926548537, 0.26085993583478473, 0.059615415961974685, 0.07736964204540367, -0.05920496842642452, -0.14461482836700537, 0.08814645052942283, 0.4337712449843393, -0.26146175247233583, -0.296343094439191, -0.0892911443267675, -0.3580869996372391, -0.06353265917859971, 0.13696726328583764, 0.10914949625730515, -0.08382756498587482, 0.007859944201567593, -0.08856147642740432, -0.15290174098164938, -0.19142623450538582, 0.2302209932494032, 0.03043733597459162, 0.2555863328387632, 0.12145564590909463, -0.009837359431035378, 0.00267425807302489, 0.24194216606864596, 0.045063370367621675, -0.14186738350459457, 0.04251396517433664, 0.21871996423339143, -0.18881561072981534, 0.19010494790204308, -0.45179824213880826, -0.14574801952249425, -0.06488066408783197, 0.09547964067965307, 0.09188609672162462, -0.14712635525228346, -0.29867000895935825, 0.080687362142592, -0.16040940853383612, -0.139147227452657, -0.18700493985567898, -0.006827585968901129, 0.037462644531008074, -0.3253353835645077, 0.10416959632078514, 0.07081312730031855, 0.13300104698719223, -0.12884497670456768, -0.16994546929045634, -0.11459173598765011, -0.034044667300494276, 0.11152250656365033, 0.12966311361695476, 0.14614719462663153, -0.0686763726243311, -0.04724254790583954, 0.396045557321871, 0.011732347491745124, -0.02569641990258413, 0.13257871069808436, -0.27802399334237526, -0.09950316886773662, 0.2178935882234809, 0.048409721584004514, 0.1133382253403611, -0.12735530505203368, 0.15997938123627511, -0.01877079507445588, 0.22236999336506844, 0.002453512539539267, 0.07201566320350941, 0.3011923230088809, 0.20655298866331578, 0.021224151546245112, 0.09457339441732449, -0.15453909108524813, -0.024022522982319487, -0.1864706719020272, -0.14159685022690716, -0.26471369737649664, 0.12183471274945666, -0.12959870406792856, -0.21284912778612444, 0.30209894996471975, 0.11415417412953342, 0.106518306328422, -0.13781501585069825, 0.25783955404562325, 0.07663107726599692, 0.061412098883267714, -0.0017521730240653542, 0.2784900540924248, 0.2555814641034778, 0.11834705766180859, -0.3043006955824025, 0.05414797427844913, 0.01856896366704913] |
1,802.02816 | Implementation of a geometrically and energetically constrained
mesoscale eddy parameterization in an ocean circulation model | The global stratification and circulation of the ocean and their
sensitivities to changes in forcing depend crucially on the representation of
the mesoscale eddy field. Here, a geometrically informed and energetically
constrained parameterization framework for mesoscale eddies --- termed
GEOMETRIC --- is proposed and implemented in three-dimensional primitive
equation channel and sector models. The GEOMETRIC framework closes mesoscale
eddy fluxes according to the standard Gent--McWilliams scheme, but with the
eddy transfer coefficient constrained by the depth-integrated eddy energy
field, provided through a prognostic eddy energy budget evolving with the mean
state. It is found that coarse resolution calculations employing GEOMETRIC
broadly reproduce model sensitivities of the eddy permitting reference
calculations in the emergent circumpolar transport, meridional overturning
circulation profile and the depth-integrated eddy energy signature; in
particular, eddy saturation emerges in the sector configuration. Some
differences arise, attributed here to the simple prognostic eddy energy budget
employed, to be improved upon in future investigations. The GEOMETRIC framework
thus proposes a shift in paradigm, from a focus on how to close for eddy
fluxes, to focusing on the representation of eddy energetics.
| physics.ao-ph physics.flu-dyn | the global stratification and circulation of the ocean and their sensitivities to changes in forcing depend crucially on the representation of the mesoscale eddy field here a geometrically informed and energetically constrained parameterization framework for mesoscale eddies termed geometric is proposed and implemented in threedimensional primitive equation channel and sector models the geometric framework closes mesoscale eddy fluxes according to the standard gentmcwilliams scheme but with the eddy transfer coefficient constrained by the depthintegrated eddy energy field provided through a prognostic eddy energy budget evolving with the mean state it is found that coarse resolution calculations employing geometric broadly reproduce model sensitivities of the eddy permitting reference calculations in the emergent circumpolar transport meridional overturning circulation profile and the depthintegrated eddy energy signature in particular eddy saturation emerges in the sector configuration some differences arise attributed here to the simple prognostic eddy energy budget employed to be improved upon in future investigations the geometric framework thus proposes a shift in paradigm from a focus on how to close for eddy fluxes to focusing on the representation of eddy energetics | [['the', 'global', 'stratification', 'and', 'circulation', 'of', 'the', 'ocean', 'and', 'their', 'sensitivities', 'to', 'changes', 'in', 'forcing', 'depend', 'crucially', 'on', 'the', 'representation', 'of', 'the', 'mesoscale', 'eddy', 'field', 'here', 'a', 'geometrically', 'informed', 'and', 'energetically', 'constrained', 'parameterization', 'framework', 'for', 'mesoscale', 'eddies', 'termed', 'geometric', 'is', 'proposed', 'and', 'implemented', 'in', 'threedimensional', 'primitive', 'equation', 'channel', 'and', 'sector', 'models', 'the', 'geometric', 'framework', 'closes', 'mesoscale', 'eddy', 'fluxes', 'according', 'to', 'the', 'standard', 'gentmcwilliams', 'scheme', 'but', 'with', 'the', 'eddy', 'transfer', 'coefficient', 'constrained', 'by', 'the', 'depthintegrated', 'eddy', 'energy', 'field', 'provided', 'through', 'a', 'prognostic', 'eddy', 'energy', 'budget', 'evolving', 'with', 'the', 'mean', 'state', 'it', 'is', 'found', 'that', 'coarse', 'resolution', 'calculations', 'employing', 'geometric', 'broadly', 'reproduce', 'model', 'sensitivities', 'of', 'the', 'eddy', 'permitting', 'reference', 'calculations', 'in', 'the', 'emergent', 'circumpolar', 'transport', 'meridional', 'overturning', 'circulation', 'profile', 'and', 'the', 'depthintegrated', 'eddy', 'energy', 'signature', 'in', 'particular', 'eddy', 'saturation', 'emerges', 'in', 'the', 'sector', 'configuration', 'some', 'differences', 'arise', 'attributed', 'here', 'to', 'the', 'simple', 'prognostic', 'eddy', 'energy', 'budget', 'employed', 'to', 'be', 'improved', 'upon', 'in', 'future', 'investigations', 'the', 'geometric', 'framework', 'thus', 'proposes', 'a', 'shift', 'in', 'paradigm', 'from', 'a', 'focus', 'on', 'how', 'to', 'close', 'for', 'eddy', 'fluxes', 'to', 'focusing', 'on', 'the', 'representation', 'of', 'eddy', 'energetics']] | [-0.11578033447224001, 0.15502755217190425, -0.10622687116603487, 0.09393937849666008, -0.09410054340318637, -0.067560634976409, -0.00822886913577771, 0.30871508871439285, -0.27982070433579426, -0.34081734384685836, 0.08450449835418011, -0.17174331224705586, -0.12049646175834097, 0.1856831197520229, -0.05276223479031309, 0.030271826552418345, 0.07658408827268046, -0.05387680151489402, 0.01370794800556962, -0.12276490243196009, 0.2717664743716407, 0.1256534693367238, 0.3134455746872215, 0.05742634802877216, 0.11956470847772382, -0.09447607224515779, -0.07056713255392856, 0.05994416135274669, -0.18564319085820308, 0.10258663746559789, 0.2290351363844617, 0.014813589020606192, 0.19722138930732572, -0.5014121597060445, -0.2764575921998011, 0.046976195665222056, 0.11380953254833734, 0.09797450453147043, 0.025715452812055343, -0.22252081983915253, 0.036259915382151266, -0.18455861805867946, -0.1111361072086547, -0.0892154762102551, -0.014331951972835972, 0.0019328194935728051, -0.29107127712217457, 0.12586097105070637, 0.01357322639015675, 0.12192193852331393, -0.10165108908904331, -0.1365685248487322, -0.08891587902131028, 0.07279425374279058, 0.07499583285658323, 0.014036431359699486, 0.1995409404333452, -0.1711546370717983, -0.04965998800133235, 0.3846440154476372, -0.11230361478841556, -0.2632074372832502, 0.14792113077947766, -0.11063353695084638, -0.07005556224710074, 0.1557427843403092, 0.15322952413692154, 0.0549282922377607, -0.1132896209672853, 0.04880429798146637, -0.0337288433415347, 0.13375250987744988, -0.000998785105330984, -0.05929881637895157, 0.23331955002683252, 0.21160783668506536, 0.09920541412787585, 0.03480156917091168, -0.1478349055542725, -0.1555453321503673, -0.27712693566185886, -0.11514644662058761, -0.16466111707495912, 0.04164409989168524, -0.056605635741081704, -0.17846658453280262, 0.41119343802981534, 0.17997340903768327, 0.13890820623433867, 0.041415524530260595, 0.30803896728174646, 0.09151988663689842, 0.07227864668427514, 0.1188277986379309, 0.2380980450028161, 0.16482290975858754, 0.17174476789903706, -0.28987650338211746, 0.07004914952275557, 0.08410634289303139] |
1,802.02817 | Theory and Numerical Modelling of Parity-Time Symmetric Structures in
Photonics: Boundary Integral Equation for Coupled Microresonator Structures | The spectral behaviour and the real-time operation of Parity-Time (PT PT)
symmetric coupled resonators are investigated. A Boundary Integral Equation
(BIE) model is developed to study these structures in the frequency domain. The
impact of realistic gain/loss material properties on the operation of the PT
PT-symmetric coupled resonators is also investigated using the time-domain
Transmission-Line Modelling (TLM) method. The BIE method is also used to study
the behaviour of an array of PT-microresonator photonic molecules.
| physics.optics | the spectral behaviour and the realtime operation of paritytime pt pt symmetric coupled resonators are investigated a boundary integral equation bie model is developed to study these structures in the frequency domain the impact of realistic gainloss material properties on the operation of the pt ptsymmetric coupled resonators is also investigated using the timedomain transmissionline modelling tlm method the bie method is also used to study the behaviour of an array of ptmicroresonator photonic molecules | [['the', 'spectral', 'behaviour', 'and', 'the', 'realtime', 'operation', 'of', 'paritytime', 'pt', 'pt', 'symmetric', 'coupled', 'resonators', 'are', 'investigated', 'a', 'boundary', 'integral', 'equation', 'bie', 'model', 'is', 'developed', 'to', 'study', 'these', 'structures', 'in', 'the', 'frequency', 'domain', 'the', 'impact', 'of', 'realistic', 'gainloss', 'material', 'properties', 'on', 'the', 'operation', 'of', 'the', 'pt', 'ptsymmetric', 'coupled', 'resonators', 'is', 'also', 'investigated', 'using', 'the', 'timedomain', 'transmissionline', 'modelling', 'tlm', 'method', 'the', 'bie', 'method', 'is', 'also', 'used', 'to', 'study', 'the', 'behaviour', 'of', 'an', 'array', 'of', 'ptmicroresonator', 'photonic', 'molecules']] | [-0.17786910478025675, 0.058176279868938446, -0.06573789522706254, -0.03399500033717502, -0.08225035523945415, -0.15979964608905484, -0.05265192297362798, 0.47376559455753176, -0.21325816986830654, -0.244747615041765, 0.10885488973596964, -0.2620634674975598, -0.17699119287568169, 0.19762742657503868, 0.04173906147480011, 0.13157577917130814, 0.018131346404049044, -0.03741501614048674, -0.07512461073142854, -0.1373328455547626, 0.2871461541240884, 0.05075396315471546, 0.3320879384975981, 0.029193419176531402, 0.06932810992254196, -0.003474842574497735, 0.03757960646337754, -0.02354375024112193, -0.1371927120080973, 0.11185472264155946, 0.21797886745991638, -0.03852975904010236, 0.22137214787103035, -0.45485459247956406, -0.22729755574727203, 0.03555175761780324, 0.10672299029318162, 0.08384050771191313, -0.05332692658113366, -0.29432742448674665, 0.03764807865199809, -0.16631177521147136, -0.1745700653441049, -0.057932957284769195, -0.039214301212514575, 0.031557589196725876, -0.26159179746802597, -0.010974058410234598, 0.04992752087717826, 0.061951046339173275, -0.06256626203429659, -0.028748214685332937, -0.06470440240652375, 0.02775095514575573, -0.06501480239613384, -0.09321558091009187, 0.14601133768824306, -0.07731262882668022, -0.09164154962510676, 0.387421793883314, -0.027072457156169252, -0.23684623020439963, 0.15442392134384528, -0.12446622111255655, -0.02254662073116649, 0.15179400598454112, 0.20258139461480282, 0.15162412605776981, -0.18228679994039387, 0.10075258488713361, 0.009673155417879793, 0.2154624643153511, 0.08461707506353992, 0.04126767508333196, 0.140731572979004, 0.22743895657461238, -0.001080383181279349, 0.2062721034461582, -0.047051766937648926, -0.10938685014843941, -0.25345406627181816, -0.13672381857837979, -0.22830425059372508, 0.007787525653839111, -0.08903093645455334, -0.19356665776639775, 0.4496677555143833, 0.11924966668861138, 0.09685235071574917, -0.0539273438704628, 0.28168284510438507, 0.19045178875377453, 0.0820930543909403, -0.008174810426410389, 0.24285553419660474, 0.21598339302314296, 0.1771996274615663, -0.330676246302303, -0.05087786323290218, 0.038338776847750354] |
1,802.02818 | Soft QCD measurements at LHC | Results from recent soft QCD measurements by LHC experiments ALICE, ATLAS,
CMS, LHCb, LHCf and TOTEM are reported. The measurements include total, elastic
and inelastic cross sections, inclusive and identified particle spectra,
underlying event and hadronic chains. Results from particle correlations in all
three collision systems, namely pp, pPb and PbPb, exhibit unexpected
similarities.
| hep-ex | results from recent soft qcd measurements by lhc experiments alice atlas cms lhcb lhcf and totem are reported the measurements include total elastic and inelastic cross sections inclusive and identified particle spectra underlying event and hadronic chains results from particle correlations in all three collision systems namely pp ppb and pbpb exhibit unexpected similarities | [['results', 'from', 'recent', 'soft', 'qcd', 'measurements', 'by', 'lhc', 'experiments', 'alice', 'atlas', 'cms', 'lhcb', 'lhcf', 'and', 'totem', 'are', 'reported', 'the', 'measurements', 'include', 'total', 'elastic', 'and', 'inelastic', 'cross', 'sections', 'inclusive', 'and', 'identified', 'particle', 'spectra', 'underlying', 'event', 'and', 'hadronic', 'chains', 'results', 'from', 'particle', 'correlations', 'in', 'all', 'three', 'collision', 'systems', 'namely', 'pp', 'ppb', 'and', 'pbpb', 'exhibit', 'unexpected', 'similarities']] | [-0.02030129545730435, 0.26581123999871864, -0.17408521794196632, 0.14317444536007112, 0.01350550307823276, -0.16210961431540824, -0.12268816972910254, 0.3477335903164068, -0.14848311390313837, -0.335596306387473, -0.06492591141593745, -0.5519144561969571, 0.054304618319427525, 0.15773527002979623, 0.13296421172304285, 0.24906712864025463, 0.26420746041737775, -0.07963272976620053, -0.024775565002561995, -0.2235923781991005, 0.2218705370194382, 0.12936632574915333, 0.20337012968957424, 0.18928208088295329, 0.06650615731012766, 0.1413076674927854, -0.1603202950640547, 0.031453043899360905, -0.1608101328731411, 0.04724654006012888, 0.3713497669539518, 0.018446172505651635, -0.02028933705555068, -0.4033266959229001, -0.045574257857407686, 0.13903852721193322, 0.09348705099654142, 0.03642006901996124, -0.10983948619967257, -0.3527202064481874, 0.09757695960191388, -0.28247663495993175, -0.04282670161962785, -0.052485328926532356, -0.016631286039396568, 0.03517055666695038, -0.23736290882031122, 0.13649292495446624, -0.06266088582816776, 0.1269978071493959, -0.06817710824328026, -0.26321800977543547, -0.06333993537851644, -0.03544215447510834, 0.09693479104155106, 0.02870212489290646, 0.2502158886442582, -0.1477043006948575, -0.3445415814165716, 0.2756559226523947, 0.07811634440871852, -0.04939802402320007, 0.2521749267837516, -0.25595047581009567, -0.16104358760208856, 0.19212960079312325, 0.2774847698294454, -0.021025631507789647, -0.2563603662851232, 0.08216590065556509, -0.005929445410233543, 0.17434247683181806, 0.11847910108648378, 0.09970918434447851, 0.09485106326691392, 0.21913229720667005, -0.10112073296396476, 0.005634685624735775, -0.1589451299428388, -0.09431010426918941, -0.4716737764990992, -0.03452649632365339, -0.09077405158852882, -0.004453788028547057, -0.02422062895574426, 0.0661568289829625, 0.269654497521481, 0.06117040467345052, 0.4205950918021025, -0.05554770154412836, 0.31089732442396106, 0.012571717461536604, 0.03364924517356687, 0.05393293713805852, 0.3699635051328827, 0.16920451703050207, 0.3092082891509765, -0.22955743857245478, 0.0609640180913697, 0.07158436463214457] |
1,802.02819 | A Complexity Theory for Labeling Schemes | In a labeling scheme the vertices of a given graph from a particular class
are assigned short labels such that adjacency can be algorithmically determined
from these labels. A representation of a graph from that class is given by the
set of its vertex labels. Due to the shortness constraint on the labels such
schemes provide space-efficient representations for various graph classes, such
as planar or interval graphs. We consider what graph classes cannot be
represented by labeling schemes when the algorithm which determines adjacency
is subjected to computational constraints.
| cs.CC cs.DS | in a labeling scheme the vertices of a given graph from a particular class are assigned short labels such that adjacency can be algorithmically determined from these labels a representation of a graph from that class is given by the set of its vertex labels due to the shortness constraint on the labels such schemes provide spaceefficient representations for various graph classes such as planar or interval graphs we consider what graph classes cannot be represented by labeling schemes when the algorithm which determines adjacency is subjected to computational constraints | [['in', 'a', 'labeling', 'scheme', 'the', 'vertices', 'of', 'a', 'given', 'graph', 'from', 'a', 'particular', 'class', 'are', 'assigned', 'short', 'labels', 'such', 'that', 'adjacency', 'can', 'be', 'algorithmically', 'determined', 'from', 'these', 'labels', 'a', 'representation', 'of', 'a', 'graph', 'from', 'that', 'class', 'is', 'given', 'by', 'the', 'set', 'of', 'its', 'vertex', 'labels', 'due', 'to', 'the', 'shortness', 'constraint', 'on', 'the', 'labels', 'such', 'schemes', 'provide', 'spaceefficient', 'representations', 'for', 'various', 'graph', 'classes', 'such', 'as', 'planar', 'or', 'interval', 'graphs', 'we', 'consider', 'what', 'graph', 'classes', 'can', 'not', 'be', 'represented', 'by', 'labeling', 'schemes', 'when', 'the', 'algorithm', 'which', 'determines', 'adjacency', 'is', 'subjected', 'to', 'computational', 'constraints']] | [-0.07676554821267888, 0.07847373894733059, -0.02486253858308543, 0.05749259043515629, -0.1449052065324325, -0.1533731298910065, 0.06667757996327274, 0.44389037001918963, -0.3468722716219478, -0.3563245274535902, 0.10165698952067152, -0.2656703967150751, -0.16291254987315898, 0.14445635766190076, -0.12841998435720636, 0.028092907976415418, 0.1677268094147791, 0.13849844641575415, -0.01403231872757385, -0.2390354125143878, 0.3474737629908454, -0.059379425462703785, 0.19689984016048795, 0.038700067023695495, 0.10420745674131827, -0.003563963741596256, -0.02535744428450426, 0.12495249032380652, -0.09076108313296732, 0.10493599323832153, 0.2917956842319364, 0.19540558105518857, 0.24698235524132603, -0.3814030402841476, -0.18749364919878625, 0.2141939184531201, 0.09908464641801522, 0.1076783272834331, 0.02547955289764514, -0.30597116880036973, 0.15051842479234828, -0.1532846375542519, 0.02660352204015458, -0.04337886778207926, 0.03564502925171957, 0.03142103795883256, -0.3241929670560409, -0.05323171098767729, 0.06648545007344213, 0.03050785760425932, 0.02516026159743318, -0.10181355805924305, -0.005908119905443227, 0.15665971197265938, -0.03699098707683343, 0.06443216764767255, 0.06020813399495987, -0.1586769119539595, -0.18028151833933298, 0.42981221829796884, 0.028060753343647327, -0.2542514049529308, 0.15506973120660245, -0.05700071182634149, -0.1806187621614599, 0.13092441750935965, 0.16098319833259006, 0.13661898531347186, -0.13100520231083654, 0.09160502065628112, -0.10163923783821392, 0.12440695896473519, 0.08064176203109898, 0.04968317823003527, 0.17675234129713788, 0.1441324937034521, 0.11396381402244934, 0.18135188177872735, -0.006696614986899626, 0.034513163421262094, -0.2911075341545946, -0.060417418501206806, -0.2986354851624468, 0.04728216595278035, -0.16189823477211726, -0.20001541938796474, 0.443689307943874, 0.10988592541684489, 0.24294654499217458, 0.1103841023593834, 0.2351730703785606, 0.1101877095542687, 0.0933202672954444, 0.14063822559930467, 0.07626757598840274, 0.10230768324070416, -0.027527171355968976, -0.12843869643152825, 0.1303067664324132, 0.17811706354125187] |
1,802.0282 | Impredicative Encodings of (Higher) Inductive Types | Postulating an impredicative universe in dependent type theory allows System
F style encodings of finitary inductive types, but these fail to satisfy the
relevant {\eta}-equalities and consequently do not admit dependent eliminators.
To recover {\eta} and dependent elimination, we present a method to construct
refinements of these impredicative encodings, using ideas from homotopy type
theory. We then extend our method to construct impredicative encodings of some
higher inductive types, such as 1-truncation and the unit circle S1.
| cs.LO math.CT math.LO | postulating an impredicative universe in dependent type theory allows system f style encodings of finitary inductive types but these fail to satisfy the relevant etaequalities and consequently do not admit dependent eliminators to recover eta and dependent elimination we present a method to construct refinements of these impredicative encodings using ideas from homotopy type theory we then extend our method to construct impredicative encodings of some higher inductive types such as 1truncation and the unit circle s1 | [['postulating', 'an', 'impredicative', 'universe', 'in', 'dependent', 'type', 'theory', 'allows', 'system', 'f', 'style', 'encodings', 'of', 'finitary', 'inductive', 'types', 'but', 'these', 'fail', 'to', 'satisfy', 'the', 'relevant', 'etaequalities', 'and', 'consequently', 'do', 'not', 'admit', 'dependent', 'eliminators', 'to', 'recover', 'eta', 'and', 'dependent', 'elimination', 'we', 'present', 'a', 'method', 'to', 'construct', 'refinements', 'of', 'these', 'impredicative', 'encodings', 'using', 'ideas', 'from', 'homotopy', 'type', 'theory', 'we', 'then', 'extend', 'our', 'method', 'to', 'construct', 'impredicative', 'encodings', 'of', 'some', 'higher', 'inductive', 'types', 'such', 'as', '1truncation', 'and', 'the', 'unit', 'circle', 's1']] | [-0.05344563364480181, 0.06487619994061931, -0.10578508231494772, 0.12706024433780266, -0.18217375789965062, -0.1939968462040844, 0.06633452072396483, 0.36337712637491915, -0.30468797914095613, -0.27588155386528296, 0.08892762462308287, -0.19911068887162592, -0.12986812746844648, 0.20722639709128998, -0.13806859242092623, -0.019994494130323323, -0.017287490246082216, 0.05598434362879121, -0.09330430091052365, -0.2621221849694848, 0.3552030477930154, -0.06979243544322487, 0.2247362492909432, 0.01190181853445737, 0.12571172999339883, 0.03060855414093423, -0.06692845154075737, 0.05052902787237575, -0.15520794338877558, 0.14690617802185252, 0.2790183940945242, 0.20566727880290464, 0.21266204212473608, -0.46601120784486594, -0.15261123181124658, 0.11578870710524682, 0.13881568381513812, 0.11300597379082128, 0.035329402877802125, -0.24748760986288912, 0.0982472030936103, -0.1990187094473329, -0.11343320582895294, -0.18698482584257267, -0.014035783622315839, 0.05289121231486972, -0.23158980331247317, 0.022865463673186145, 0.1679750726754336, 0.04157942827594908, -0.08915508116096087, -0.07522746353673651, 0.0318010991322808, 0.07878219586640817, -0.011664000045704214, 0.0014126528373086139, 0.1303509156905899, -0.03099373788082678, -0.1596279356346809, 0.32017608207503434, -0.06397840545794584, -0.217310200396337, 0.2143715104382289, -0.07624240226945594, -0.21866297495771983, 0.08892359051816656, 0.070654211908971, 0.166077550133004, -0.07985840420434742, 0.10365554617218502, -0.022588889604728473, 0.20104039791285208, 0.12882914047345126, 0.08370156073023712, 0.17074335174402222, 0.06809689200752855, 0.039091176045507096, 0.1152118528629408, 0.028385909556068088, -0.054703164551603164, -0.3623964535072446, -0.11049829896441415, -0.05882655615048287, 0.07891600609984475, -0.0975347485105694, -0.22933322290497782, 0.3088634210687719, 0.1925580997363125, 0.13722166791558266, 0.13432771120661577, 0.22635516335599518, 0.07347898764878903, 0.10204245603496306, 0.018290191754012516, 0.13107111937202526, 0.18639556733940385, 0.07348673974966484, -0.1221909202469856, 0.01815784653330124, 0.17631079896206134] |
1,802.02821 | Data-adaptive doubly robust instrumental variable methods for treatment
effect heterogeneity | We consider the estimation of the average treatment effect in the treated as
a function of baseline covariates, where there is a valid (conditional)
instrument.
We describe two doubly robust (DR) estimators: a locally efficient
g-estimator, and a targeted minimum loss-based estimator (TMLE). These two DR
estimators can be viewed as generalisations of the two-stage least squares
(TSLS) method to semi-parametric models that make weaker assumptions. We
exploit recent theoretical results that extend to the g-estimator the use of
data-adaptive fits for the nuisance parameters.
A simulation study is used to compare standard TSLS with the two DR
estimators' finite-sample performance, (1) when fitted using parametric
nuisance models, and (2) using data-adaptive nuisance fits, obtained from the
Super Learner, an ensemble machine learning method.
Data-adaptive DR estimators have lower bias and improved coverage, when
compared to incorrectly specified parametric DR estimators and TSLS. When the
parametric model for the treatment effect curve is correctly specified, the
g-estimator outperforms all others, but when this model is misspecified, TMLE
performs best, while TSLS can result in large biases and zero coverage.
Finally, we illustrate the methods by reanalysing the COPERS (COping with
persistent Pain, Effectiveness Research in Self-management) trial to make
inference about the causal effect of treatment actually received, and the
extent to which this is modified by depression at baseline.
| stat.ME | we consider the estimation of the average treatment effect in the treated as a function of baseline covariates where there is a valid conditional instrument we describe two doubly robust dr estimators a locally efficient gestimator and a targeted minimum lossbased estimator tmle these two dr estimators can be viewed as generalisations of the twostage least squares tsls method to semiparametric models that make weaker assumptions we exploit recent theoretical results that extend to the gestimator the use of dataadaptive fits for the nuisance parameters a simulation study is used to compare standard tsls with the two dr estimators finitesample performance 1 when fitted using parametric nuisance models and 2 using dataadaptive nuisance fits obtained from the super learner an ensemble machine learning method dataadaptive dr estimators have lower bias and improved coverage when compared to incorrectly specified parametric dr estimators and tsls when the parametric model for the treatment effect curve is correctly specified the gestimator outperforms all others but when this model is misspecified tmle performs best while tsls can result in large biases and zero coverage finally we illustrate the methods by reanalysing the copers coping with persistent pain effectiveness research in selfmanagement trial to make inference about the causal effect of treatment actually received and the extent to which this is modified by depression at baseline | [['we', 'consider', 'the', 'estimation', 'of', 'the', 'average', 'treatment', 'effect', 'in', 'the', 'treated', 'as', 'a', 'function', 'of', 'baseline', 'covariates', 'where', 'there', 'is', 'a', 'valid', 'conditional', 'instrument', 'we', 'describe', 'two', 'doubly', 'robust', 'dr', 'estimators', 'a', 'locally', 'efficient', 'gestimator', 'and', 'a', 'targeted', 'minimum', 'lossbased', 'estimator', 'tmle', 'these', 'two', 'dr', 'estimators', 'can', 'be', 'viewed', 'as', 'generalisations', 'of', 'the', 'twostage', 'least', 'squares', 'tsls', 'method', 'to', 'semiparametric', 'models', 'that', 'make', 'weaker', 'assumptions', 'we', 'exploit', 'recent', 'theoretical', 'results', 'that', 'extend', 'to', 'the', 'gestimator', 'the', 'use', 'of', 'dataadaptive', 'fits', 'for', 'the', 'nuisance', 'parameters', 'a', 'simulation', 'study', 'is', 'used', 'to', 'compare', 'standard', 'tsls', 'with', 'the', 'two', 'dr', 'estimators', 'finitesample', 'performance', '1', 'when', 'fitted', 'using', 'parametric', 'nuisance', 'models', 'and', '2', 'using', 'dataadaptive', 'nuisance', 'fits', 'obtained', 'from', 'the', 'super', 'learner', 'an', 'ensemble', 'machine', 'learning', 'method', 'dataadaptive', 'dr', 'estimators', 'have', 'lower', 'bias', 'and', 'improved', 'coverage', 'when', 'compared', 'to', 'incorrectly', 'specified', 'parametric', 'dr', 'estimators', 'and', 'tsls', 'when', 'the', 'parametric', 'model', 'for', 'the', 'treatment', 'effect', 'curve', 'is', 'correctly', 'specified', 'the', 'gestimator', 'outperforms', 'all', 'others', 'but', 'when', 'this', 'model', 'is', 'misspecified', 'tmle', 'performs', 'best', 'while', 'tsls', 'can', 'result', 'in', 'large', 'biases', 'and', 'zero', 'coverage', 'finally', 'we', 'illustrate', 'the', 'methods', 'by', 'reanalysing', 'the', 'copers', 'coping', 'with', 'persistent', 'pain', 'effectiveness', 'research', 'in', 'selfmanagement', 'trial', 'to', 'make', 'inference', 'about', 'the', 'causal', 'effect', 'of', 'treatment', 'actually', 'received', 'and', 'the', 'extent', 'to', 'which', 'this', 'is', 'modified', 'by', 'depression', 'at', 'baseline']] | [-0.0025944547955218922, 0.0013907487748310897, -0.09158523520029503, 0.14469836343432774, -0.09153392468685428, -0.2298476102455736, 0.06941331917054305, 0.4125805470367392, -0.20503429169702816, -0.2879081478100015, 0.13043896981023814, -0.2592753008301434, -0.14173426741912756, 0.19802208932129386, -0.14543497732406713, 0.08186530695216024, 0.0740400890449751, -0.018068667401806304, -0.06986464868984334, -0.3233481912595139, 0.244521585471724, 0.10026041659330907, 0.3178056532870043, -0.043884878799523394, 0.10413811581762673, 0.026285812153468188, -0.04908530723429009, 0.05791763547163661, -0.11839280900744494, 0.10145159171400889, 0.27201960645297774, 0.17049675581968265, 0.36720042055702373, -0.3305477419587439, -0.23196800124988845, 0.11062126530793635, 0.12842311851385785, 0.09615377780341343, 0.02566438559527811, -0.25291217082035494, 0.053545903263520024, -0.21654770043614793, -0.07323423920616032, -0.11439305154785309, -0.06980379860099728, 0.006331405445846163, -0.37171350230705247, 0.12603481938917888, 0.054140756510572347, 0.06849888555246265, -0.028925119993833986, -0.2086159650153442, 0.021964796117111426, 0.065723049326281, 0.10785928281549297, 0.0009217352901912851, 0.10737630619761028, -0.12066826382099086, -0.10721082996670582, 0.2955805489989572, -0.09996450648958834, -0.23448483025565844, 0.14167144847821156, -0.10881279061493128, -0.1215881353773636, 0.08586860622479218, 0.1919888405333439, 0.11622624797427593, -0.1778488341630139, 0.028095847517188178, -0.011825349219100865, 0.15179210416674954, 0.022168344773934753, -0.04443860485018592, 0.1321080358088714, 0.17601483474170881, 0.07899597728067848, 0.11730444951878104, -0.13281240822751603, -0.0526635945948972, -0.28669446985743363, -0.05973934653623361, -0.1561710369931619, -0.020847999978785035, -0.10988580714658723, -0.16956235978276082, 0.37987064586348457, 0.22405075348837122, 0.17188348199908524, 0.11898388723299529, 0.3401984686104232, 0.12138449881102499, 0.048325865459841036, 0.08352409634679624, 0.22535978420956493, 0.09342039086362644, -0.03137382223551506, -0.21035186598209246, 0.1386378718785661, 0.018756193858379983] |
1,802.02822 | The Crab pulsar: ion-proton plasma and high-frequency radio spectrum | Salient features of the remarkable band structure seen in the high-frequency
interpulse of the Crab pulsar are summarized. It is argued that its source must
lie in a current sheet, probably coincident with the open-closed magnetosphere
separatrix, and that the mechanism is a form of one-pass free-electron laser.
An outward moving electron component in the current sheet interacts with the
longitudinal electric field of an inward directed ion-proton Lamgmuir mode. The
band structure is then a natural consequence of the differing charge-to-mass
ratios of the ions, which are a return current component of those accelerated,
as in almost all pulsars, from the polar cap to the light cylinder.
| astro-ph.HE | salient features of the remarkable band structure seen in the highfrequency interpulse of the crab pulsar are summarized it is argued that its source must lie in a current sheet probably coincident with the openclosed magnetosphere separatrix and that the mechanism is a form of onepass freeelectron laser an outward moving electron component in the current sheet interacts with the longitudinal electric field of an inward directed ionproton lamgmuir mode the band structure is then a natural consequence of the differing chargetomass ratios of the ions which are a return current component of those accelerated as in almost all pulsars from the polar cap to the light cylinder | [['salient', 'features', 'of', 'the', 'remarkable', 'band', 'structure', 'seen', 'in', 'the', 'highfrequency', 'interpulse', 'of', 'the', 'crab', 'pulsar', 'are', 'summarized', 'it', 'is', 'argued', 'that', 'its', 'source', 'must', 'lie', 'in', 'a', 'current', 'sheet', 'probably', 'coincident', 'with', 'the', 'openclosed', 'magnetosphere', 'separatrix', 'and', 'that', 'the', 'mechanism', 'is', 'a', 'form', 'of', 'onepass', 'freeelectron', 'laser', 'an', 'outward', 'moving', 'electron', 'component', 'in', 'the', 'current', 'sheet', 'interacts', 'with', 'the', 'longitudinal', 'electric', 'field', 'of', 'an', 'inward', 'directed', 'ionproton', 'lamgmuir', 'mode', 'the', 'band', 'structure', 'is', 'then', 'a', 'natural', 'consequence', 'of', 'the', 'differing', 'chargetomass', 'ratios', 'of', 'the', 'ions', 'which', 'are', 'a', 'return', 'current', 'component', 'of', 'those', 'accelerated', 'as', 'in', 'almost', 'all', 'pulsars', 'from', 'the', 'polar', 'cap', 'to', 'the', 'light', 'cylinder']] | [-0.16050250131515004, 0.182130383560706, -0.03223922420902369, 0.052570945803602616, -0.08793894141024658, -0.08617911606626673, -0.014472363994589564, 0.4090611406506222, -0.3010628155250947, -0.2459112758765641, 0.05010876991072339, -0.2835915230702017, -0.07261065901996934, 0.21799518914771415, -0.02738568108098007, -0.04379977722419426, 0.04485126442676323, 0.04004777438294525, -0.006505052197863844, -0.13135021591706475, 0.2579386625787087, 0.09075836692370962, 0.2575466892155427, 0.02400743578795657, 0.08301183732148155, -0.06940553398698429, 0.048207731121089135, -0.0018241423351916476, -0.03494827073814334, 0.08548705581418961, 0.19976428779555816, 0.07127206047962063, 0.17835560989801155, -0.4704328665518524, -0.19578758827367118, -0.0009853144080560897, 0.16482889266667244, 0.06040929406163256, -0.04693107499749722, -0.2485679801657935, 0.029364243689402242, -0.1748968174280686, -0.18776711262762547, 0.06814668071694252, 0.058272819766974966, 0.04929325649097005, -0.23362199010471074, 0.05208103524991006, 0.10412537926268355, 0.03332127346961855, -0.11664014936873045, -0.09478836639775573, -0.061871176278740864, 0.05796142001353448, 0.1261948490728598, 0.12479305011002678, 0.19073684913515349, -0.15959333557261277, -0.09973586424282169, 0.3816030506810574, -0.07092903006961133, -0.09856908248898477, 0.15371354410390012, -0.23446769788687197, -0.08778785961619187, 0.20705621341400057, 0.1041883842619223, 0.08719449849781867, -0.11047766504865836, 0.06069842791326222, -0.06747098601310053, 0.13385546482037577, 0.08597931675569406, 0.00844153458966273, 0.32582427916404244, 0.1372901080703911, 0.06743050990713255, 0.13556925993995897, -0.17493084298498998, -0.06111963166176368, -0.287037627046893, -0.1236226371028156, -0.15956144446967319, 0.054847614759161514, -0.06602685721621035, -0.2026048873368407, 0.43825170019789483, 0.09637326734129907, 0.17844468627612445, -0.05367933952567281, 0.31888341364041667, 0.12955446985972366, 0.06894746606856167, 0.1446038788123596, 0.307869411952724, 0.15109144208004055, 0.11848710148342859, -0.20026940838259724, 0.05504214179198362, 0.013000106291027269] |
1,802.02823 | Self-ordered nanostructures on patterned substrates: Experiment and
theory of metalorganic vapor-phase epitaxy of V-groove quantum wires and
pyramidal quantum dots | The formation of nanostructures during metalorganic vapor-phase epitaxy on
patterned (001)/(111)B GaAs substrates is reviewed. The focus of this review is
on the seminal experiments that revealed the key kinetic processes during
nanostructure formation and the theory and modelling that explained the
phenomenology in successively greater detail. Experiments have demonstrated
that V-groove quantum wires and pyramidal quantum dots result from
self-limiting concentration profiles that develop at the bottom of V-grooves
and inverted pyramids, respectively. In the 1950s, long before the practical
importance of patterned substrates became evident, the mechanisms of
capillarity during the equilibration of non-planar surfaces were identified and
characterized. This was followed, from the late 1980s by the identification of
growth rate anisotropies (i.e. differential growth rates of crystallographic
facets) and precursor decomposition anisotropies, with parallel developments in
the fabrication of V-groove quantum wires and pyramidal quantum dots. The
modelling of these growth processes began at the scale of facets and culminated
in systems of coupled reaction-diffusion equations, one for each
crystallographic facet that defines the pattern, which takes account of the
decomposition and surface diffusion kinetics of the group-III precursors and
the subsequent surface diffusion and incorporation of the group-III atoms
released by these precursors. Solutions of the equations with optimized
parameters produced concentration profiles that provided a quantitative
interpretation of the time-, temperature-, and alloy-concentration dependence
of the self-ordering process seen in experiments.
| cond-mat.mes-hall | the formation of nanostructures during metalorganic vaporphase epitaxy on patterned 001111b gaas substrates is reviewed the focus of this review is on the seminal experiments that revealed the key kinetic processes during nanostructure formation and the theory and modelling that explained the phenomenology in successively greater detail experiments have demonstrated that vgroove quantum wires and pyramidal quantum dots result from selflimiting concentration profiles that develop at the bottom of vgrooves and inverted pyramids respectively in the 1950s long before the practical importance of patterned substrates became evident the mechanisms of capillarity during the equilibration of nonplanar surfaces were identified and characterized this was followed from the late 1980s by the identification of growth rate anisotropies ie differential growth rates of crystallographic facets and precursor decomposition anisotropies with parallel developments in the fabrication of vgroove quantum wires and pyramidal quantum dots the modelling of these growth processes began at the scale of facets and culminated in systems of coupled reactiondiffusion equations one for each crystallographic facet that defines the pattern which takes account of the decomposition and surface diffusion kinetics of the groupiii precursors and the subsequent surface diffusion and incorporation of the groupiii atoms released by these precursors solutions of the equations with optimized parameters produced concentration profiles that provided a quantitative interpretation of the time temperature and alloyconcentration dependence of the selfordering process seen in experiments | [['the', 'formation', 'of', 'nanostructures', 'during', 'metalorganic', 'vaporphase', 'epitaxy', 'on', 'patterned', '001111b', 'gaas', 'substrates', 'is', 'reviewed', 'the', 'focus', 'of', 'this', 'review', 'is', 'on', 'the', 'seminal', 'experiments', 'that', 'revealed', 'the', 'key', 'kinetic', 'processes', 'during', 'nanostructure', 'formation', 'and', 'the', 'theory', 'and', 'modelling', 'that', 'explained', 'the', 'phenomenology', 'in', 'successively', 'greater', 'detail', 'experiments', 'have', 'demonstrated', 'that', 'vgroove', 'quantum', 'wires', 'and', 'pyramidal', 'quantum', 'dots', 'result', 'from', 'selflimiting', 'concentration', 'profiles', 'that', 'develop', 'at', 'the', 'bottom', 'of', 'vgrooves', 'and', 'inverted', 'pyramids', 'respectively', 'in', 'the', '1950s', 'long', 'before', 'the', 'practical', 'importance', 'of', 'patterned', 'substrates', 'became', 'evident', 'the', 'mechanisms', 'of', 'capillarity', 'during', 'the', 'equilibration', 'of', 'nonplanar', 'surfaces', 'were', 'identified', 'and', 'characterized', 'this', 'was', 'followed', 'from', 'the', 'late', '1980s', 'by', 'the', 'identification', 'of', 'growth', 'rate', 'anisotropies', 'ie', 'differential', 'growth', 'rates', 'of', 'crystallographic', 'facets', 'and', 'precursor', 'decomposition', 'anisotropies', 'with', 'parallel', 'developments', 'in', 'the', 'fabrication', 'of', 'vgroove', 'quantum', 'wires', 'and', 'pyramidal', 'quantum', 'dots', 'the', 'modelling', 'of', 'these', 'growth', 'processes', 'began', 'at', 'the', 'scale', 'of', 'facets', 'and', 'culminated', 'in', 'systems', 'of', 'coupled', 'reactiondiffusion', 'equations', 'one', 'for', 'each', 'crystallographic', 'facet', 'that', 'defines', 'the', 'pattern', 'which', 'takes', 'account', 'of', 'the', 'decomposition', 'and', 'surface', 'diffusion', 'kinetics', 'of', 'the', 'groupiii', 'precursors', 'and', 'the', 'subsequent', 'surface', 'diffusion', 'and', 'incorporation', 'of', 'the', 'groupiii', 'atoms', 'released', 'by', 'these', 'precursors', 'solutions', 'of', 'the', 'equations', 'with', 'optimized', 'parameters', 'produced', 'concentration', 'profiles', 'that', 'provided', 'a', 'quantitative', 'interpretation', 'of', 'the', 'time', 'temperature', 'and', 'alloyconcentration', 'dependence', 'of', 'the', 'selfordering', 'process', 'seen', 'in', 'experiments']] | [-0.09022895341946019, 0.18739757843729524, -0.054654484817551245, -0.0038540217184264394, 0.02698080129197074, -0.1264116623485461, -0.003105550823836691, 0.36702196148327654, -0.2613609809676806, -0.2765573119454914, 0.08142185587798141, -0.27094619705031314, -0.14385712958458396, 0.1927493258400096, 0.01869075689309587, 0.046891641347772545, 0.04273877135995362, -0.09009734330181446, -0.042656372727619275, -0.2542007340889217, 0.2647839638275198, 0.08829866843711999, 0.33044052311115796, 0.08111793865967128, 0.09380241440143436, -0.015459695025864575, 0.00970948266900248, -0.00704916898575094, -0.20451743000387473, 0.09871670749452378, 0.20420506821324427, 0.03265419048567613, 0.2131581757259038, -0.5350115452955166, -0.23882954018397465, -0.012884080138885312, 0.13516230767049517, 0.10940533578758024, -0.12055914809202982, -0.258186885210582, 0.037929503118826285, -0.06489565670490265, -0.11067601771145645, 0.011924741264018747, 0.017490499667409395, 0.024199310129042716, -0.19679552119070043, 0.09218958866730746, 0.08880854511245465, 0.075906459575312, -0.0560510072298348, -0.11929390749583642, -0.0837539436481893, 0.08613034239038825, 0.024379503462437748, -0.03060093768988736, 0.19322298766113818, -0.10789881904506021, -0.13141369412239226, 0.3591407022759732, -0.038254002282499436, -0.08648931334416071, 0.1822035358266698, -0.1795461213238175, -0.0982762117156138, 0.1537127626273367, 0.1603461542663475, 0.11290886866989443, -0.13475477217230947, 0.0746190242231306, 0.060982730297578704, 0.14326301986972492, 0.1336036582963748, 0.0031241530138585304, 0.22554576862189504, 0.21157162136708696, -0.014130329850854145, 0.13033122760140234, -0.08699423740928372, -0.11704298989795563, -0.23968732795264158, -0.20884603830157883, -0.16928895191599924, 0.05255303866799093, -0.0779723501446036, -0.17761910610314874, 0.3962974202591512, 0.07855261808882157, 0.18780776429300508, -0.041256229695864025, 0.20790879631208048, 0.06657481729803193, 0.08803476679759721, -0.01835422875566615, 0.21944971782569256, 0.17778751082925334, 0.12801013441238968, -0.2549190013710823, 0.13396587163209916, 0.027746939957141878] |
1,802.02824 | Chemical evolution with rotating massive star yields: I. The solar
neighbourhood and the s-process elements | We present a comprehensive study of the abundance evolution of the elements
from H to U in the Milky Way halo and local disk. We use a consistent chemical
evolution model, metallicity dependent isotopic yields from low and
intermediate mass stars and yields from massive stars which include, for the
first time, the combined effect of metallicity, mass loss and rotation for a
large grid of stellar masses and for all stages of stellar evolution. The
yields of massive stars are weighted by a metallicity dependent function of the
rotational velocities, constrained by observations as to obtain a primary-like
$^{14}$N behavior at low metallicity and to avoid overproduction of s-elements
at intermediate metallicities. We show that the solar system isotopic
composition can be reproduced to better than a factor of two for isotopes up to
the Fe-peak, and at the 10\% level for most pure s-isotopes, both light ones
(resulting from the weak s-process in rotating massive stars) and the heavy
ones (resulting from the main s-process in low and intermediate mass stars). We
conclude that the light element primary process (LEPP), invoked to explain the
apparent abundance deficiency of the s-elements with A< 100, is not necessary.
We also reproduce the evolution of the heavy to light s-elements abundance
ratio ([hs/ls]) - recently observed in unevolved thin disk stars - as a result
of the contribution of rotating massive stars at sub-solar metallicities. We
find that those stars produce primary F and dominate its solar abundance and we
confirm their role in the observed primary behavior of N. In contrast, we show
that their action is insufficient to explain the small observed values of
C12/C13 in halo red giants, which is rather due to internal processes in those
stars.
| astro-ph.GA | we present a comprehensive study of the abundance evolution of the elements from h to u in the milky way halo and local disk we use a consistent chemical evolution model metallicity dependent isotopic yields from low and intermediate mass stars and yields from massive stars which include for the first time the combined effect of metallicity mass loss and rotation for a large grid of stellar masses and for all stages of stellar evolution the yields of massive stars are weighted by a metallicity dependent function of the rotational velocities constrained by observations as to obtain a primarylike 14n behavior at low metallicity and to avoid overproduction of selements at intermediate metallicities we show that the solar system isotopic composition can be reproduced to better than a factor of two for isotopes up to the fepeak and at the 10 level for most pure sisotopes both light ones resulting from the weak sprocess in rotating massive stars and the heavy ones resulting from the main sprocess in low and intermediate mass stars we conclude that the light element primary process lepp invoked to explain the apparent abundance deficiency of the selements with a 100 is not necessary we also reproduce the evolution of the heavy to light selements abundance ratio hsls recently observed in unevolved thin disk stars as a result of the contribution of rotating massive stars at subsolar metallicities we find that those stars produce primary f and dominate its solar abundance and we confirm their role in the observed primary behavior of n in contrast we show that their action is insufficient to explain the small observed values of c12c13 in halo red giants which is rather due to internal processes in those stars | [['we', 'present', 'a', 'comprehensive', 'study', 'of', 'the', 'abundance', 'evolution', 'of', 'the', 'elements', 'from', 'h', 'to', 'u', 'in', 'the', 'milky', 'way', 'halo', 'and', 'local', 'disk', 'we', 'use', 'a', 'consistent', 'chemical', 'evolution', 'model', 'metallicity', 'dependent', 'isotopic', 'yields', 'from', 'low', 'and', 'intermediate', 'mass', 'stars', 'and', 'yields', 'from', 'massive', 'stars', 'which', 'include', 'for', 'the', 'first', 'time', 'the', 'combined', 'effect', 'of', 'metallicity', 'mass', 'loss', 'and', 'rotation', 'for', 'a', 'large', 'grid', 'of', 'stellar', 'masses', 'and', 'for', 'all', 'stages', 'of', 'stellar', 'evolution', 'the', 'yields', 'of', 'massive', 'stars', 'are', 'weighted', 'by', 'a', 'metallicity', 'dependent', 'function', 'of', 'the', 'rotational', 'velocities', 'constrained', 'by', 'observations', 'as', 'to', 'obtain', 'a', 'primarylike', '14n', 'behavior', 'at', 'low', 'metallicity', 'and', 'to', 'avoid', 'overproduction', 'of', 'selements', 'at', 'intermediate', 'metallicities', 'we', 'show', 'that', 'the', 'solar', 'system', 'isotopic', 'composition', 'can', 'be', 'reproduced', 'to', 'better', 'than', 'a', 'factor', 'of', 'two', 'for', 'isotopes', 'up', 'to', 'the', 'fepeak', 'and', 'at', 'the', '10', 'level', 'for', 'most', 'pure', 'sisotopes', 'both', 'light', 'ones', 'resulting', 'from', 'the', 'weak', 'sprocess', 'in', 'rotating', 'massive', 'stars', 'and', 'the', 'heavy', 'ones', 'resulting', 'from', 'the', 'main', 'sprocess', 'in', 'low', 'and', 'intermediate', 'mass', 'stars', 'we', 'conclude', 'that', 'the', 'light', 'element', 'primary', 'process', 'lepp', 'invoked', 'to', 'explain', 'the', 'apparent', 'abundance', 'deficiency', 'of', 'the', 'selements', 'with', 'a', '100', 'is', 'not', 'necessary', 'we', 'also', 'reproduce', 'the', 'evolution', 'of', 'the', 'heavy', 'to', 'light', 'selements', 'abundance', 'ratio', 'hsls', 'recently', 'observed', 'in', 'unevolved', 'thin', 'disk', 'stars', 'as', 'a', 'result', 'of', 'the', 'contribution', 'of', 'rotating', 'massive', 'stars', 'at', 'subsolar', 'metallicities', 'we', 'find', 'that', 'those', 'stars', 'produce', 'primary', 'f', 'and', 'dominate', 'its', 'solar', 'abundance', 'and', 'we', 'confirm', 'their', 'role', 'in', 'the', 'observed', 'primary', 'behavior', 'of', 'n', 'in', 'contrast', 'we', 'show', 'that', 'their', 'action', 'is', 'insufficient', 'to', 'explain', 'the', 'small', 'observed', 'values', 'of', 'c12c13', 'in', 'halo', 'red', 'giants', 'which', 'is', 'rather', 'due', 'to', 'internal', 'processes', 'in', 'those', 'stars']] | [-0.03565681227304379, 0.1806150637631944, -0.05522955111017003, 0.1133656358054202, -0.044540702440785666, -0.030337508737015496, 0.07390323707684615, 0.386521481315018, -0.17946517066940834, -0.3750112961218384, -0.005502932943494581, -0.2795386431342841, -0.01918000219145304, 0.17066361538446037, -0.06699480579432607, -0.03144574231233485, 0.08728043125773607, -0.013282269593944792, -0.06649143827952549, -0.24306959681576346, 0.33333690311980374, 0.04536463381855007, 0.14359434006187274, -0.019665913275468978, 0.020977892671169823, -0.13395201143093136, -0.03640035785513992, -0.02640541492335057, -0.10833057994479298, 0.0494842700269203, 0.21411298338538004, 0.12851130047680012, 0.16470360397020492, -0.3689069206978905, -0.19582651020240652, 0.07270886752132216, 0.2003298656948443, 0.08611170513610573, -0.13351676030042306, -0.1928914417301788, 0.10872351246129865, -0.17075037205338686, -0.200055367430552, 0.022078513106954273, 0.026071614916809552, 0.024911012255930655, -0.2863748788369985, 0.12156698523924478, 0.05213652109120444, 0.08759570884021836, -0.09620876290765672, -0.1692581317547339, -0.11106106215432442, 0.1023733074965851, 0.07258480720500662, 0.02094580147560209, 0.1310118344756012, -0.10245351635004014, 0.02781817213127565, 0.4374743699053958, -0.15463529744791718, -0.033063758554858665, 0.22221598858565403, -0.21509308227944718, -0.17872160635174672, 0.1108678314568741, 0.1742833038988338, 0.16804772981147215, -0.16149330649602808, 0.01982314035976679, 0.02837337994175713, 0.17502338401421594, 0.05932403127696302, 0.06175593041428706, 0.2842955841116594, 0.1403955195897392, 0.02110859506052857, 0.030015189477683852, -0.15257922441533114, -0.06585736318332393, -0.2166374659276071, -0.1463455783044238, -0.07477199889249769, 0.06498895315880333, -0.1362818409374916, -0.13691752672470045, 0.3279615358859406, 0.1274955101937497, 0.26475499454360024, 0.04137076552671734, 0.29760426945192575, 0.10313452085060675, 0.1187472016978944, 0.0965640168224919, 0.29942758133284464, 0.21219469402358584, 0.0953562991890447, -0.30291123558987804, 0.12159998445262166, 0.010365648215023301] |
1,802.02825 | Forecasting under model uncertainty:Non-homogeneous hidden Markov models
with Polya-Gamma data augmentation | We consider two-state Non-Homogeneous Hidden Markov Models (NHHMMs) for
forecasting univariate time series. Given a set of predictors, the time series
are modeled via predictive regressions with state dependent coefficients and
time-varying transition probabilities that depend on the predictors via a
logistic function. In a hidden Markov setting, inference for logistic
regression coefficients becomes complicated and in some cases impossible due to
convergence issues. In this paper, we aim to address this problem using a new
latent variable scheme that utilizes the P\'{o}lya-Gamma class of
distributions. We allow for model uncertainty regarding the predictors that
affect the series both linearly -- in the mean -- and non-linearly -- in the
transition matrix. Predictor selection and inference on the model parameters
are based on a MCMC scheme with reversible jump steps. Single-step and
multiple-steps-ahead predictions are obtained by the most probable model,
median probability model or a Bayesian Model Averaging approach. Using
simulation experiments, we illustrate the performance of our algorithm in
various setups, in terms of mixing properties, model selection and predictive
ability. An empirical study on realized volatility data shows that our
methodology gives improved forecasts compared to benchmark models.
| stat.ME | we consider twostate nonhomogeneous hidden markov models nhhmms for forecasting univariate time series given a set of predictors the time series are modeled via predictive regressions with state dependent coefficients and timevarying transition probabilities that depend on the predictors via a logistic function in a hidden markov setting inference for logistic regression coefficients becomes complicated and in some cases impossible due to convergence issues in this paper we aim to address this problem using a new latent variable scheme that utilizes the polyagamma class of distributions we allow for model uncertainty regarding the predictors that affect the series both linearly in the mean and nonlinearly in the transition matrix predictor selection and inference on the model parameters are based on a mcmc scheme with reversible jump steps singlestep and multiplestepsahead predictions are obtained by the most probable model median probability model or a bayesian model averaging approach using simulation experiments we illustrate the performance of our algorithm in various setups in terms of mixing properties model selection and predictive ability an empirical study on realized volatility data shows that our methodology gives improved forecasts compared to benchmark models | [['we', 'consider', 'twostate', 'nonhomogeneous', 'hidden', 'markov', 'models', 'nhhmms', 'for', 'forecasting', 'univariate', 'time', 'series', 'given', 'a', 'set', 'of', 'predictors', 'the', 'time', 'series', 'are', 'modeled', 'via', 'predictive', 'regressions', 'with', 'state', 'dependent', 'coefficients', 'and', 'timevarying', 'transition', 'probabilities', 'that', 'depend', 'on', 'the', 'predictors', 'via', 'a', 'logistic', 'function', 'in', 'a', 'hidden', 'markov', 'setting', 'inference', 'for', 'logistic', 'regression', 'coefficients', 'becomes', 'complicated', 'and', 'in', 'some', 'cases', 'impossible', 'due', 'to', 'convergence', 'issues', 'in', 'this', 'paper', 'we', 'aim', 'to', 'address', 'this', 'problem', 'using', 'a', 'new', 'latent', 'variable', 'scheme', 'that', 'utilizes', 'the', 'polyagamma', 'class', 'of', 'distributions', 'we', 'allow', 'for', 'model', 'uncertainty', 'regarding', 'the', 'predictors', 'that', 'affect', 'the', 'series', 'both', 'linearly', 'in', 'the', 'mean', 'and', 'nonlinearly', 'in', 'the', 'transition', 'matrix', 'predictor', 'selection', 'and', 'inference', 'on', 'the', 'model', 'parameters', 'are', 'based', 'on', 'a', 'mcmc', 'scheme', 'with', 'reversible', 'jump', 'steps', 'singlestep', 'and', 'multiplestepsahead', 'predictions', 'are', 'obtained', 'by', 'the', 'most', 'probable', 'model', 'median', 'probability', 'model', 'or', 'a', 'bayesian', 'model', 'averaging', 'approach', 'using', 'simulation', 'experiments', 'we', 'illustrate', 'the', 'performance', 'of', 'our', 'algorithm', 'in', 'various', 'setups', 'in', 'terms', 'of', 'mixing', 'properties', 'model', 'selection', 'and', 'predictive', 'ability', 'an', 'empirical', 'study', 'on', 'realized', 'volatility', 'data', 'shows', 'that', 'our', 'methodology', 'gives', 'improved', 'forecasts', 'compared', 'to', 'benchmark', 'models']] | [-0.029187223941628492, 0.04521780989393504, -0.07717273841106323, 0.08968173741408053, -0.06399426562836774, -0.17812747331536424, 0.10324487140870363, 0.4266225204712922, -0.2729604652418094, -0.28010795328525767, 0.12175862972079451, -0.2485287031158805, -0.1704710884731994, 0.21020925757149736, -0.06289062577159575, 0.1263185201234044, 0.07846232300802004, 0.003248491904057402, -0.047386303328738735, -0.2739064959516268, 0.2806049803151719, 0.07536509574731431, 0.31885323711540753, -0.06534867848692742, 0.1464704146880346, 0.009749250569110435, -0.07195184526649574, -0.00047833874116325314, -0.10835188772777841, 0.1111705799102633, 0.23552873360810042, 0.1284268310153356, 0.32212975890355644, -0.3957128475072183, -0.2593006022594949, 0.12330821618407724, 0.10489315803598372, 0.0829471455291114, 0.006928517493189022, -0.26980952676185355, 0.002489078891343407, -0.18512742938154617, -0.0519522567785355, -0.14414963496833919, -0.06323326741325198, 0.03639808171353633, -0.36987541330056967, 0.12518443830025894, 0.035055829583847474, 0.04673155497835313, -0.06058928778179751, -0.1264910246808863, 0.01765997427382997, 0.061097970258341905, 0.07653804320181089, -0.02975649478650021, 0.10040147178581045, -0.11990496041052924, -0.15641921657508098, 0.32966918353196634, -0.1209514913216774, -0.2644604956130347, 0.16764250718763157, -0.09109382248002916, -0.19472782344617431, 0.0889545715857117, 0.24828900787002978, 0.13256411685768554, -0.16180091312590747, 0.057927608142621934, -0.03289297335250403, 0.16994599135272126, -0.03199352176174001, -0.055557823042705734, 0.15288896153816173, 0.22123705131322224, 0.030343211772951788, 0.13122235743769556, -0.09253081262126685, -0.16387362638989122, -0.29658620491791615, -0.09978292603045702, -0.16572115778477403, -0.024111281875120377, -0.15274201817663452, -0.17758372855893467, 0.4110692659161296, 0.224571641640968, 0.22817299643942024, 0.12987917130913146, 0.26989024838492753, 0.1405473139910159, -0.007459003438231766, 0.06534146055859584, 0.13453360718392682, 0.12124478780183821, 0.0428764163841924, -0.19275078315397984, 0.18168701376560675, 0.048531435790561864] |
1,802.02826 | Comment on "Phase Control of Directed Diffusion in a Symmetric Optical
Lattice" | Comment on the paper Schiavoni et al., Phys. Rev. Lett. 90, 094101 (2003).
| cond-mat.stat-mech nlin.AO | comment on the paper schiavoni et al phys rev lett 90 094101 2003 | [['comment', 'on', 'the', 'paper', 'schiavoni', 'et', 'al', 'phys', 'rev', 'lett', '90', '094101', '2003']] | [0.01844233045509706, -0.0006051541616519293, 0.1550186233362183, -0.46972116727071506, -0.2030698231731852, 0.08218435632685821, 0.2918472560995724, 0.193334096033747, 0.24634804956925413, -0.5044743667046229, -0.3016936299391091, -0.2956896883745988, -0.4051740361998479, 0.2421901716540257, -0.49307715706527233, -0.026075941588108737, -0.019541486554468673, -0.34447155116746825, -0.02589892332131664, -0.5806421252588431, -0.15155922962973514, 0.3999912296421826, 0.3975444945196311, 0.14907653303816915, 0.010141155837724606, 0.2156256859889254, -0.10493077834447224, -0.13204655547936758, -0.49443195170412463, -0.17310705672328672, 0.05159584626865884, 0.09409276159324993, 0.22983668682475886, -0.365294624119997, -0.25367880519479513, 0.10089289265063901, -0.16920579876750708, 0.15663613856304437, 0.24370904719883887, -0.6178291644901037, -0.020309396146330982, -0.3856076455364625, -0.05678704710832486, -0.19745384622365236, 0.4881801704565684, -0.08875910326605663, -0.3370214107756813, 0.42608833592385054, 0.09367940823237102, 0.06270339712500572, 0.22862931321530292, -0.06684388204788168, -0.07538391215105851, -0.44338901216785115, -0.2193411954989036, 0.2503050754700477, 0.03086998701716463, 0.29265175433829427, -0.22748727708434066, 0.1977245888362328, 0.08880751962230231, 0.013836271439989408, 0.38137719345589477, 0.028598785555611055, -0.23306270440419516, -0.08073475336035092, 0.23227237071841955, 0.2623985844353835, -0.253165002213791, 0.3693194103737672, -0.33474090074499446, 0.09218690202881892, 0.38098821354409057, -0.041738055956860386, 0.06399648652101557, -0.04879975924268365, -0.3458838854761173, -0.09717912832275033, -0.16015975542056063, -0.1251989349887784, -0.30265273347807425, -0.22245474066585302, -0.22571158036589622, 0.13798091125984988, 0.3725214311853051, -0.005734935713311036, 0.39921452353398007, 0.31089555223782855, 0.40142636311550933, -0.09539236330116789, -0.03692607985188564, 0.03289829861993591, -0.41571584219733876, 0.5141628040000796, 0.3954152346899112, 0.2561928544503947, 0.16942003567237407, -0.18212691321969032, -0.12086361087858677, 0.09819245493660371] |
1,802.02827 | Developing indicators on Open Access by combining evidence from diverse
data sources | In the last couple of years, the role of Open Access (OA) publishing has
become central in science management and research policy. In the UK and the
Netherlands, national OA mandates require the scientific community to seriously
consider publishing research outputs in OA forms. At the same time, other
elements of Open Science are becoming also part of the debate, thus including
not only publishing research outputs but also other related aspects of the
chain of scientific knowledge production such as open peer review and open
data. From a research management point of view, it is important to keep track
of the progress made in the OA publishing debate. Until now, this has been
quite problematic, given the fact that OA as a topic is hard to grasp by
bibliometric methods, as most databases supporting bibliometric data lack
exhaustive and accurate open access labelling of scientific publications. In
this study, we present a methodology that systematically creates OA labels for
large sets of publications processed in the Web of Science database. The
methodology is based on the combination of diverse data sources that provide
evidence of publications being OA
| cs.DL cs.DB | in the last couple of years the role of open access oa publishing has become central in science management and research policy in the uk and the netherlands national oa mandates require the scientific community to seriously consider publishing research outputs in oa forms at the same time other elements of open science are becoming also part of the debate thus including not only publishing research outputs but also other related aspects of the chain of scientific knowledge production such as open peer review and open data from a research management point of view it is important to keep track of the progress made in the oa publishing debate until now this has been quite problematic given the fact that oa as a topic is hard to grasp by bibliometric methods as most databases supporting bibliometric data lack exhaustive and accurate open access labelling of scientific publications in this study we present a methodology that systematically creates oa labels for large sets of publications processed in the web of science database the methodology is based on the combination of diverse data sources that provide evidence of publications being oa | [['in', 'the', 'last', 'couple', 'of', 'years', 'the', 'role', 'of', 'open', 'access', 'oa', 'publishing', 'has', 'become', 'central', 'in', 'science', 'management', 'and', 'research', 'policy', 'in', 'the', 'uk', 'and', 'the', 'netherlands', 'national', 'oa', 'mandates', 'require', 'the', 'scientific', 'community', 'to', 'seriously', 'consider', 'publishing', 'research', 'outputs', 'in', 'oa', 'forms', 'at', 'the', 'same', 'time', 'other', 'elements', 'of', 'open', 'science', 'are', 'becoming', 'also', 'part', 'of', 'the', 'debate', 'thus', 'including', 'not', 'only', 'publishing', 'research', 'outputs', 'but', 'also', 'other', 'related', 'aspects', 'of', 'the', 'chain', 'of', 'scientific', 'knowledge', 'production', 'such', 'as', 'open', 'peer', 'review', 'and', 'open', 'data', 'from', 'a', 'research', 'management', 'point', 'of', 'view', 'it', 'is', 'important', 'to', 'keep', 'track', 'of', 'the', 'progress', 'made', 'in', 'the', 'oa', 'publishing', 'debate', 'until', 'now', 'this', 'has', 'been', 'quite', 'problematic', 'given', 'the', 'fact', 'that', 'oa', 'as', 'a', 'topic', 'is', 'hard', 'to', 'grasp', 'by', 'bibliometric', 'methods', 'as', 'most', 'databases', 'supporting', 'bibliometric', 'data', 'lack', 'exhaustive', 'and', 'accurate', 'open', 'access', 'labelling', 'of', 'scientific', 'publications', 'in', 'this', 'study', 'we', 'present', 'a', 'methodology', 'that', 'systematically', 'creates', 'oa', 'labels', 'for', 'large', 'sets', 'of', 'publications', 'processed', 'in', 'the', 'web', 'of', 'science', 'database', 'the', 'methodology', 'is', 'based', 'on', 'the', 'combination', 'of', 'diverse', 'data', 'sources', 'that', 'provide', 'evidence', 'of', 'publications', 'being', 'oa']] | [-0.0630610809460031, 0.060078366073193376, -0.044126919048182944, 0.040607600557253196, -0.12495857858586878, -0.10081372096907919, 0.10326598302175405, 0.4119758962495893, -0.2175869657959858, -0.34475192874325095, 0.14178237943446864, -0.32880631691367224, -0.08544738965771757, 0.21462738949549262, -0.0910959030334005, 0.030688863324627242, 0.11676385667835357, 0.022866892876139244, 0.013618824971475142, -0.32846148909998457, 0.2969614334993321, 0.09601553769137898, 0.367084770731963, 0.10760101688059943, 0.0076946147856741115, -0.025129593903859142, -0.19372601700803788, -0.021988433169782478, -0.07647324163800386, 0.17804376485328827, 0.35416409284586, 0.25471983711659, 0.38944243763391145, -0.39846298432657645, -0.19892200311921812, 0.019453213266811514, 0.14451966346512554, 0.07132625937580116, -0.0910349155181191, -0.27256099701361364, 0.023773388551528413, -0.19478509336199967, -0.12299589753623992, -0.06069009785882872, 0.06786887616408181, -0.023111029396267243, -0.1714417189359665, 0.00572538753280357, 0.002235687923742084, 0.1530967684322229, -0.005593109000030728, -0.14578866819658923, 0.024328967987525242, 0.2470565623081432, 0.1227386387467887, 0.08969873781180472, 0.10993143036794016, -0.1745330162306942, -0.1443592502871681, 0.41097980249850524, 0.011612753245841574, -0.11547985586801866, 0.16917577372844178, -0.10998872496808569, -0.2301151493229169, 0.0690032849815137, 0.1865533674690163, 0.030635204200667364, -0.23895815329468517, 0.09812362221680661, -0.04392604821327108, 0.1603140246343895, 0.07081834068946866, 0.031823066287432554, 0.21749005856968107, 0.19924902452264356, 0.06070395771207081, 0.09345005317985342, -0.00953761648224105, -0.09214622647964726, -0.24848510727542575, -0.1345139982100427, -0.15343418946026494, 0.04689995866651073, 0.016123495246074284, -0.22143916974106567, 0.3888954325682587, 0.20431175760887724, 0.08495576023345902, -0.07241057311603553, 0.29277333956231516, -0.01811790178226869, 0.1370076729851977, 0.10887962767593168, 0.19356137153904432, 0.019542671716648828, 0.18242605498045802, -0.10487487113655165, 0.10050248156336171, -0.03458794653809891] |
1,802.02828 | PTP: Path-specified Transport Protocol for Concurrent Multipath
Transmission in Named Data Networks | Named Data Networking (NDN) is a promising Future Internet architecture to
support content distribution. Its inherent addressless routing paradigm brings
valuable characteristics to improve the transmission robustness and efficiency,
e.g. users are enabled to download content from multiple providers
concurrently. However, multipath transmission NDN is different from that in
Multipath TCP, i.e. the "paths" in NDN are transparent to and uncontrollable by
users. To this end, the user controls the traffic on all transmission paths as
an entirety, which leads to a noticeable problem of low bandwidth utilization.
In particular, the congestion of a certain path will trigger the traffic
reduction on the other transmission paths that are underutilized. Some
solutions have been proposed by letting routers balance the loads of different
paths to avoid congesting a certain path prematurely. However, the complexity
of obtaining an optimal load balancing solution (of solving a Multi-Commodity
Flow problem) becomes higher with the increasing network size, which limits the
universal NDN deployments. This paper introduces a compromising solution -
Path-specified Transport Protocol (PTP). PTP supports both the label switching
and the addressless routing schemes. Specifically, the label switching scheme
facilitates users to precisely control the traffic on each transmission path,
and the addressless routing scheme maintains the valuable feature of retrieving
content from any provider to guarantee robustness. As the traffic on a
transmission path can be explicitly controlled by consumers, load balancing is
no longer needed in routers, which reduce the computational burden of routers
and consequently increase the system scalability. The experimental results show
that PTP significantly increases the users' downloading rates and improved the
network throughput.
| cs.NI | named data networking ndn is a promising future internet architecture to support content distribution its inherent addressless routing paradigm brings valuable characteristics to improve the transmission robustness and efficiency eg users are enabled to download content from multiple providers concurrently however multipath transmission ndn is different from that in multipath tcp ie the paths in ndn are transparent to and uncontrollable by users to this end the user controls the traffic on all transmission paths as an entirety which leads to a noticeable problem of low bandwidth utilization in particular the congestion of a certain path will trigger the traffic reduction on the other transmission paths that are underutilized some solutions have been proposed by letting routers balance the loads of different paths to avoid congesting a certain path prematurely however the complexity of obtaining an optimal load balancing solution of solving a multicommodity flow problem becomes higher with the increasing network size which limits the universal ndn deployments this paper introduces a compromising solution pathspecified transport protocol ptp ptp supports both the label switching and the addressless routing schemes specifically the label switching scheme facilitates users to precisely control the traffic on each transmission path and the addressless routing scheme maintains the valuable feature of retrieving content from any provider to guarantee robustness as the traffic on a transmission path can be explicitly controlled by consumers load balancing is no longer needed in routers which reduce the computational burden of routers and consequently increase the system scalability the experimental results show that ptp significantly increases the users downloading rates and improved the network throughput | [['named', 'data', 'networking', 'ndn', 'is', 'a', 'promising', 'future', 'internet', 'architecture', 'to', 'support', 'content', 'distribution', 'its', 'inherent', 'addressless', 'routing', 'paradigm', 'brings', 'valuable', 'characteristics', 'to', 'improve', 'the', 'transmission', 'robustness', 'and', 'efficiency', 'eg', 'users', 'are', 'enabled', 'to', 'download', 'content', 'from', 'multiple', 'providers', 'concurrently', 'however', 'multipath', 'transmission', 'ndn', 'is', 'different', 'from', 'that', 'in', 'multipath', 'tcp', 'ie', 'the', 'paths', 'in', 'ndn', 'are', 'transparent', 'to', 'and', 'uncontrollable', 'by', 'users', 'to', 'this', 'end', 'the', 'user', 'controls', 'the', 'traffic', 'on', 'all', 'transmission', 'paths', 'as', 'an', 'entirety', 'which', 'leads', 'to', 'a', 'noticeable', 'problem', 'of', 'low', 'bandwidth', 'utilization', 'in', 'particular', 'the', 'congestion', 'of', 'a', 'certain', 'path', 'will', 'trigger', 'the', 'traffic', 'reduction', 'on', 'the', 'other', 'transmission', 'paths', 'that', 'are', 'underutilized', 'some', 'solutions', 'have', 'been', 'proposed', 'by', 'letting', 'routers', 'balance', 'the', 'loads', 'of', 'different', 'paths', 'to', 'avoid', 'congesting', 'a', 'certain', 'path', 'prematurely', 'however', 'the', 'complexity', 'of', 'obtaining', 'an', 'optimal', 'load', 'balancing', 'solution', 'of', 'solving', 'a', 'multicommodity', 'flow', 'problem', 'becomes', 'higher', 'with', 'the', 'increasing', 'network', 'size', 'which', 'limits', 'the', 'universal', 'ndn', 'deployments', 'this', 'paper', 'introduces', 'a', 'compromising', 'solution', 'pathspecified', 'transport', 'protocol', 'ptp', 'ptp', 'supports', 'both', 'the', 'label', 'switching', 'and', 'the', 'addressless', 'routing', 'schemes', 'specifically', 'the', 'label', 'switching', 'scheme', 'facilitates', 'users', 'to', 'precisely', 'control', 'the', 'traffic', 'on', 'each', 'transmission', 'path', 'and', 'the', 'addressless', 'routing', 'scheme', 'maintains', 'the', 'valuable', 'feature', 'of', 'retrieving', 'content', 'from', 'any', 'provider', 'to', 'guarantee', 'robustness', 'as', 'the', 'traffic', 'on', 'a', 'transmission', 'path', 'can', 'be', 'explicitly', 'controlled', 'by', 'consumers', 'load', 'balancing', 'is', 'no', 'longer', 'needed', 'in', 'routers', 'which', 'reduce', 'the', 'computational', 'burden', 'of', 'routers', 'and', 'consequently', 'increase', 'the', 'system', 'scalability', 'the', 'experimental', 'results', 'show', 'that', 'ptp', 'significantly', 'increases', 'the', 'users', 'downloading', 'rates', 'and', 'improved', 'the', 'network', 'throughput']] | [-0.2324477890876799, 0.057805252624045046, -0.030014198440987842, 0.0028182972554614853, -0.1195150290705814, -0.2203924075707398, 0.1757451762175399, 0.40748807228748885, -0.3151144774870552, -0.30498980790919933, 0.09079939594922701, -0.2811781246299771, -0.13228500044241434, 0.16117103240685537, -0.15684582184687976, 0.08809800045084117, 0.09182951230556655, 0.006654646661252517, 0.0047626605135685, -0.2763696136111817, 0.26260016927996976, 0.11146170623110127, 0.40659099946832145, 0.11387596160828693, 0.06019579212415644, 0.011985354358771336, -0.031578090034820365, -0.0045837022676785254, -0.06433562579626817, 0.12251060811060156, 0.2983767455496656, 0.20055906674524798, 0.2911574873053751, -0.4449195427834197, -0.2658835224221658, 0.0891508571318506, 0.1688143400870379, 0.0743006864208975, -0.027560363611855515, -0.26419267212358216, 0.1476453456568627, -0.22171981706086433, -0.05858276597802725, -0.017975864512140328, -0.04725890066809811, 0.05537867493077294, -0.26575803884065174, -0.04080605091858712, -0.039887943911845934, -0.003728342468534582, -0.028021698470128642, -0.031607384915608265, -0.05075499632706245, 0.18997763314727115, 0.029606047077598334, -0.01343223011468636, 0.13732268029531097, -0.14431883265779383, -0.13200841862933224, 0.40589744789935084, 0.04707418623729609, -0.1729078594432918, 0.14317273340720654, 0.005032211425714195, -0.0803876357320846, 0.15424430967576688, 0.2025264012309256, 0.05701610342503321, -0.1804340570908442, -0.002093557253718962, 0.0027910840175481458, 0.17320202606567886, 0.10161294042887731, 0.09577251080422271, 0.11386937929891053, 0.21388270444092058, 0.19474495274996365, 0.10316343958181802, -0.05278352359803676, -0.10765265805512723, -0.20183647167009025, -0.1624473202991243, -0.15977986766048355, 0.020927360871362245, -0.14683620839269046, -0.10368226032005623, 0.3802406700729217, 0.18851819549551388, 0.170305896469279, 0.10192547416161025, 0.40991011480571504, 0.09873915699074243, 0.10155208175208165, 0.16578901492793, 0.12676216438679452, -0.005703762135729476, 0.20813101447834703, -0.24600862294601306, 0.14946108504734706, -0.00936280095519385] |
1,802.02829 | A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE).I.
Introduction to the Survey | The Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE) is a
blind narrow-band Halpha+[NII] imaging survey carried out with MegaCam at the
Canada-France-Hawaii Telescope. The survey covers the whole Virgo cluster
region from its core to one virial radius (104 deg^2). The sensitivity of the
survey is of f(Halpha) ~ 4 x 10^-17 erg sec-1 cm^-2 (5 sigma detection limit)
for point sources and Sigma (Halpha) ~ 2 x 10^-18 erg sec^-1 cm^-2 arcsec^-2 (1
sigma detection limit at 3 arcsec resolution) for extended sources, making
VESTIGE the deepest and largest blind narrow-band survey of a nearby cluster.
This paper presents the survey in all its technical aspects, including the
survey design, the observing strategy, the achieved sensitivity in both the
narrow-band Halpha+[NII] and in the broad-band r filter used for the stellar
continuum subtraction, the data reduction, calibration, and products, as well
as its status after the first observing semester. We briefly describe the
Halpha properties of galaxies located in a 4x1 deg^2 strip in the core of the
cluster north of M87, where several extended tails of ionised gas are detected.
This paper also lists the main scientific motivations of VESTIGE, which include
the study of the effects of the environment on galaxy evolution, the fate of
the stripped gas in cluster objects, the star formation process in nearby
galaxies of different type and stellar mass, the determination of the Halpha
luminosity function and of the Halpha scaling relations down to ~ 10^6 Mo
stellar mass objects, and the reconstruction of the dynamical structure of the
Virgo cluster. This unique set of data will also be used to study the HII
luminosity function in hundreds of galaxies, the diffuse Halpha+[NII] emission
of the Milky Way at high Galactic latitude, and the properties of emission line
galaxies at high redshift.
| astro-ph.GA | the virgo environmental survey tracing ionised gas emission vestige is a blind narrowband halphanii imaging survey carried out with megacam at the canadafrancehawaii telescope the survey covers the whole virgo cluster region from its core to one virial radius 104 deg2 the sensitivity of the survey is of fhalpha 4 x 1017 erg sec1 cm2 5 sigma detection limit for point sources and sigma halpha 2 x 1018 erg sec1 cm2 arcsec2 1 sigma detection limit at 3 arcsec resolution for extended sources making vestige the deepest and largest blind narrowband survey of a nearby cluster this paper presents the survey in all its technical aspects including the survey design the observing strategy the achieved sensitivity in both the narrowband halphanii and in the broadband r filter used for the stellar continuum subtraction the data reduction calibration and products as well as its status after the first observing semester we briefly describe the halpha properties of galaxies located in a 4x1 deg2 strip in the core of the cluster north of m87 where several extended tails of ionised gas are detected this paper also lists the main scientific motivations of vestige which include the study of the effects of the environment on galaxy evolution the fate of the stripped gas in cluster objects the star formation process in nearby galaxies of different type and stellar mass the determination of the halpha luminosity function and of the halpha scaling relations down to 106 mo stellar mass objects and the reconstruction of the dynamical structure of the virgo cluster this unique set of data will also be used to study the hii luminosity function in hundreds of galaxies the diffuse halphanii emission of the milky way at high galactic latitude and the properties of emission line galaxies at high redshift | [['the', 'virgo', 'environmental', 'survey', 'tracing', 'ionised', 'gas', 'emission', 'vestige', 'is', 'a', 'blind', 'narrowband', 'halphanii', 'imaging', 'survey', 'carried', 'out', 'with', 'megacam', 'at', 'the', 'canadafrancehawaii', 'telescope', 'the', 'survey', 'covers', 'the', 'whole', 'virgo', 'cluster', 'region', 'from', 'its', 'core', 'to', 'one', 'virial', 'radius', '104', 'deg2', 'the', 'sensitivity', 'of', 'the', 'survey', 'is', 'of', 'fhalpha', '4', 'x', '1017', 'erg', 'sec1', 'cm2', '5', 'sigma', 'detection', 'limit', 'for', 'point', 'sources', 'and', 'sigma', 'halpha', '2', 'x', '1018', 'erg', 'sec1', 'cm2', 'arcsec2', '1', 'sigma', 'detection', 'limit', 'at', '3', 'arcsec', 'resolution', 'for', 'extended', 'sources', 'making', 'vestige', 'the', 'deepest', 'and', 'largest', 'blind', 'narrowband', 'survey', 'of', 'a', 'nearby', 'cluster', 'this', 'paper', 'presents', 'the', 'survey', 'in', 'all', 'its', 'technical', 'aspects', 'including', 'the', 'survey', 'design', 'the', 'observing', 'strategy', 'the', 'achieved', 'sensitivity', 'in', 'both', 'the', 'narrowband', 'halphanii', 'and', 'in', 'the', 'broadband', 'r', 'filter', 'used', 'for', 'the', 'stellar', 'continuum', 'subtraction', 'the', 'data', 'reduction', 'calibration', 'and', 'products', 'as', 'well', 'as', 'its', 'status', 'after', 'the', 'first', 'observing', 'semester', 'we', 'briefly', 'describe', 'the', 'halpha', 'properties', 'of', 'galaxies', 'located', 'in', 'a', '4x1', 'deg2', 'strip', 'in', 'the', 'core', 'of', 'the', 'cluster', 'north', 'of', 'm87', 'where', 'several', 'extended', 'tails', 'of', 'ionised', 'gas', 'are', 'detected', 'this', 'paper', 'also', 'lists', 'the', 'main', 'scientific', 'motivations', 'of', 'vestige', 'which', 'include', 'the', 'study', 'of', 'the', 'effects', 'of', 'the', 'environment', 'on', 'galaxy', 'evolution', 'the', 'fate', 'of', 'the', 'stripped', 'gas', 'in', 'cluster', 'objects', 'the', 'star', 'formation', 'process', 'in', 'nearby', 'galaxies', 'of', 'different', 'type', 'and', 'stellar', 'mass', 'the', 'determination', 'of', 'the', 'halpha', 'luminosity', 'function', 'and', 'of', 'the', 'halpha', 'scaling', 'relations', 'down', 'to', '106', 'mo', 'stellar', 'mass', 'objects', 'and', 'the', 'reconstruction', 'of', 'the', 'dynamical', 'structure', 'of', 'the', 'virgo', 'cluster', 'this', 'unique', 'set', 'of', 'data', 'will', 'also', 'be', 'used', 'to', 'study', 'the', 'hii', 'luminosity', 'function', 'in', 'hundreds', 'of', 'galaxies', 'the', 'diffuse', 'halphanii', 'emission', 'of', 'the', 'milky', 'way', 'at', 'high', 'galactic', 'latitude', 'and', 'the', 'properties', 'of', 'emission', 'line', 'galaxies', 'at', 'high', 'redshift']] | [-0.05667126420381379, 0.04097561565252809, -0.026370854252143045, 0.08406812283420556, -0.077956493236062, -0.0019632652934192174, 0.044259820555856054, 0.41496380685434847, -0.15573864526602896, -0.3499409190172817, 0.10046889067095417, -0.3169329966287185, -0.0003133429755025462, 0.18154312728126, 0.014690786916836816, -0.045658394434493606, 0.04648695473935011, -0.09651431097374016, -0.0472854367037278, -0.2810876779277784, 0.27172096774307075, 0.08122210033962991, 0.18402287705399833, -0.017233069165728535, 0.1057563597491111, -0.07381335596847755, -0.11618155555490205, -0.062152022194865805, -0.15675796436664693, 0.0290382411377817, 0.2699252801588674, 0.16380963158393716, 0.24449952638058786, -0.3148595289852245, -0.1524245356718991, 0.05855219292332537, 0.2133964621907275, -0.0214072666025483, -0.021365468053931632, -0.3314761333222245, 0.053559052368826014, -0.19449892924198467, -0.22206895019946582, 0.1261038070219575, 0.034681469328076836, 0.04091117990003186, -0.16510679344658352, 0.12844327562422203, -0.012535302446324585, 0.11592281646671042, -0.10251239478516223, -0.11130678895962481, -0.036571252394558225, 0.07909089845258292, -0.04724484646777644, 0.09264700389904713, 0.2359363092828367, -0.19139491129610312, 0.011993391417441952, 0.3876952201525693, -0.06030052925472541, 0.04054428572218002, 0.18581081190788742, -0.23386537823779197, -0.21633751028461146, 0.1739868772049722, 0.16418970880940895, 0.09511765721019658, -0.18928842803939158, 0.05129526622340258, -0.018915694861300916, 0.2247006696241247, 0.040595520834669774, 0.0958711275629775, 0.30400935408890545, 0.12297561882538784, 0.08545942434089043, 0.10876955266224671, -0.3243477358279637, 0.010611541680569742, -0.29436325100906846, -0.09751021337282106, -0.10538590587511495, 0.08704032707293737, -0.11820706334113512, -0.10768557249079302, 0.36444122897423553, 0.140702011885634, 0.18863165975882729, 0.039295538178185666, 0.3101364179895628, 0.0432829269393673, 0.0995298623585536, 0.06342410421289578, 0.29485771803172844, 0.200020524100463, 0.08786463440745919, -0.2040955755986967, -0.013520131568930694, -0.006883560093088488] |
1,802.0283 | Convergence as period goes to infinity of spectra of periodic traveling
waves toward essential spectra of a homoclinic limit | We revisit the analysis by R.A. Gardner of convergence of spectra of periodic
traveling waves in the homoclinic, or infinite-period limit, extending his
results to the case of essential rather than point spectra of the limiting
homoclinic wave. Notably, convergence to essential spectra is seen to be of
algebraic rate with respect to period as compared to the exponential rate of
convergence to point spectra. In the course of the analysis, we show not only
convergence of spectrum but also convergence of an appropriate renormalization
of the associated periodic Evans function to the Evans function for the
limiting homoclinic wave, a fact that is useful for numerical investigations
| math.AP | we revisit the analysis by ra gardner of convergence of spectra of periodic traveling waves in the homoclinic or infiniteperiod limit extending his results to the case of essential rather than point spectra of the limiting homoclinic wave notably convergence to essential spectra is seen to be of algebraic rate with respect to period as compared to the exponential rate of convergence to point spectra in the course of the analysis we show not only convergence of spectrum but also convergence of an appropriate renormalization of the associated periodic evans function to the evans function for the limiting homoclinic wave a fact that is useful for numerical investigations | [['we', 'revisit', 'the', 'analysis', 'by', 'ra', 'gardner', 'of', 'convergence', 'of', 'spectra', 'of', 'periodic', 'traveling', 'waves', 'in', 'the', 'homoclinic', 'or', 'infiniteperiod', 'limit', 'extending', 'his', 'results', 'to', 'the', 'case', 'of', 'essential', 'rather', 'than', 'point', 'spectra', 'of', 'the', 'limiting', 'homoclinic', 'wave', 'notably', 'convergence', 'to', 'essential', 'spectra', 'is', 'seen', 'to', 'be', 'of', 'algebraic', 'rate', 'with', 'respect', 'to', 'period', 'as', 'compared', 'to', 'the', 'exponential', 'rate', 'of', 'convergence', 'to', 'point', 'spectra', 'in', 'the', 'course', 'of', 'the', 'analysis', 'we', 'show', 'not', 'only', 'convergence', 'of', 'spectrum', 'but', 'also', 'convergence', 'of', 'an', 'appropriate', 'renormalization', 'of', 'the', 'associated', 'periodic', 'evans', 'function', 'to', 'the', 'evans', 'function', 'for', 'the', 'limiting', 'homoclinic', 'wave', 'a', 'fact', 'that', 'is', 'useful', 'for', 'numerical', 'investigations']] | [-0.15650716718691574, 0.030170481819233694, -0.1407172435860115, 0.09351711902504407, -0.046808747540193575, -0.07856294688234036, 0.06487803032225067, 0.320234146900475, -0.24859301927844407, -0.21534478398697737, 0.14393388885892583, -0.27562214796327883, -0.1435920065031732, 0.2461009577447031, -0.046531817793880624, 0.10196660533202467, 0.07363796763604989, 0.048011516100140636, -0.07265503679324563, -0.20701772227227963, 0.3148652297548122, 0.10154873649244783, 0.21815562479335954, 0.014643342760219067, 0.02429657989112591, 0.0020781518089481527, -0.019366586771933793, -0.02440773147800765, -0.15002654682818198, 0.08124252047454555, 0.23170328124736747, 0.08562308401990405, 0.27219162297141913, -0.3691937677148316, -0.2005721663180911, 0.10774296985430366, 0.21573420526908227, 0.0890651187143737, -0.015640968245592107, -0.2776433036261652, 0.11987625973092185, -0.11535579422316342, -0.2362183795991802, -0.08639939979615587, 0.04391880424831201, 0.11973785258898581, -0.2608729534290938, 0.09908572071920692, 0.1055696458179564, 0.09355288432238416, -0.07290903226412074, -0.05592412784311886, -0.08052247616082982, 0.11603999910746804, 0.14648705289302463, 0.02292183901321281, 0.07347132566522944, -0.10226765416424584, -0.0744333409971592, 0.3697215805468322, -0.095427986707229, -0.14817421336623807, 0.18918577647612742, -0.1890835448974502, -0.1135837784720395, 0.2162579953825722, 0.1311684552649105, 0.11601982458442864, -0.10062509023204998, 0.05827664279624716, -0.030759142832216133, 0.12847783502150345, 0.11356837651692331, 0.022406250229795224, 0.12177466816717276, 0.11929791596614653, 0.12636068982667187, 0.13036220442370028, -0.047585499076780655, -0.13250365601507602, -0.30242604947502344, -0.13119834145807005, -0.1814659929541112, 0.07951471262222859, -0.07479293022899786, -0.18386679394515576, 0.4378508438369156, 0.12988261973778545, 0.18546839769179416, 0.07645063003076723, 0.24305340501962713, 0.17647615737277428, -0.0030665143560866083, 0.06485134917568723, 0.2626139198610973, 0.1767886657185887, 0.11249761216997824, -0.2315451392421016, 0.011552792512466785, 0.11607886033339633] |
1,802.02831 | Exponential collocation methods for the cubic Schr\"{o}dinger equation | In this paper we derive and analyse new exponential collocation methods to
efficiently solve the cubic Schr\"{o}dinger Cauchy problem on a $d$-dimensional
torus. Energy preservation is a key feature of the cubic Schr\"{o}dinger
equation. It is proved that the novel methods can be of arbitrarily high order
which exactly or nearly preserve the continuous energy of the original
continuous system. The existence and uniqueness, regularity, global
convergence, nonlinear stability of the new methods are studied in detail. Two
practical exponential collocation methods are constructed and two numerical
experiments are included. The numerical results illustrate the efficiency of
the new methods in comparison with existing numerical methods in the
literature.
| math.NA | in this paper we derive and analyse new exponential collocation methods to efficiently solve the cubic schrodinger cauchy problem on a ddimensional torus energy preservation is a key feature of the cubic schrodinger equation it is proved that the novel methods can be of arbitrarily high order which exactly or nearly preserve the continuous energy of the original continuous system the existence and uniqueness regularity global convergence nonlinear stability of the new methods are studied in detail two practical exponential collocation methods are constructed and two numerical experiments are included the numerical results illustrate the efficiency of the new methods in comparison with existing numerical methods in the literature | [['in', 'this', 'paper', 'we', 'derive', 'and', 'analyse', 'new', 'exponential', 'collocation', 'methods', 'to', 'efficiently', 'solve', 'the', 'cubic', 'schrodinger', 'cauchy', 'problem', 'on', 'a', 'ddimensional', 'torus', 'energy', 'preservation', 'is', 'a', 'key', 'feature', 'of', 'the', 'cubic', 'schrodinger', 'equation', 'it', 'is', 'proved', 'that', 'the', 'novel', 'methods', 'can', 'be', 'of', 'arbitrarily', 'high', 'order', 'which', 'exactly', 'or', 'nearly', 'preserve', 'the', 'continuous', 'energy', 'of', 'the', 'original', 'continuous', 'system', 'the', 'existence', 'and', 'uniqueness', 'regularity', 'global', 'convergence', 'nonlinear', 'stability', 'of', 'the', 'new', 'methods', 'are', 'studied', 'in', 'detail', 'two', 'practical', 'exponential', 'collocation', 'methods', 'are', 'constructed', 'and', 'two', 'numerical', 'experiments', 'are', 'included', 'the', 'numerical', 'results', 'illustrate', 'the', 'efficiency', 'of', 'the', 'new', 'methods', 'in', 'comparison', 'with', 'existing', 'numerical', 'methods', 'in', 'the', 'literature']] | [-0.10147391459605562, -0.00809851654489106, -0.07508828509342644, 0.09184392324516362, -0.05770256104580033, -0.13840059784813485, -0.030597559884489606, 0.36803647208053175, -0.29281060669118314, -0.25996890242015, 0.1636687482519229, -0.2710571703330161, -0.1476251792371991, 0.20913038717223964, -0.04857948330634727, 0.14703791053675183, 0.08767405285611066, -0.0001329507512134423, -0.14019725379670775, -0.3074151003442773, 0.32358464918210417, 0.009941812151820835, 0.27757718690047295, 0.034895592535751946, 0.10166804554846583, -0.08134573521979, -0.04707977766119832, 0.022222204014248806, -0.16061008564409332, 0.15392516007317966, 0.22965517579876912, 0.08379790224903903, 0.32457321196145145, -0.4200354262229499, -0.2344648098026257, 0.11549674776818501, 0.15513024975144124, 0.12325552458246879, -0.07194551719681556, -0.2729530618397878, 0.09179356785324497, -0.11193620154651207, -0.17670105273382516, -0.1542031771648641, -0.06444002765683679, 0.1009992629464784, -0.2730292066453247, 0.10611673741048168, 0.0753036297285297, 0.02480579425427003, -0.09903971129097044, -0.08542337764477477, -0.015810501328114113, 0.06300105047924871, 0.04045844042178141, -0.02568693942210953, 0.003419481499821221, -0.08141901902534034, -0.14632380651865462, 0.3713328915246583, -0.04929054946181527, -0.2595541409362073, 0.19945123182383254, -0.09273924123188225, -0.1257862756498705, 0.14348895501328307, 0.1917953136710262, 0.1701707623796452, -0.14903151992934868, 0.13543267388146696, -0.053449513531640305, 0.14391640102097747, 0.07240730743009358, -0.0005202790884591571, 0.0869433887883884, 0.15897624784335068, 0.10232101723022007, 0.13790935664672677, -0.04137261068595813, -0.14078470655939107, -0.31032790462358284, -0.1262727013913009, -0.1984103290842624, 0.013550483352513215, -0.1210169304337688, -0.15778129526473786, 0.4159780953318701, 0.1602971096728168, 0.13873286889609668, 0.04151312048934665, 0.31376935204986584, 0.1844016991709487, -0.007904044886487067, 0.07856811243662111, 0.22685765909082298, 0.11729204974248322, 0.11347936029725392, -0.2354215024591321, 0.00528180559909125, 0.14527814851544046] |
1,802.02832 | Points de hauteur born\'ee sur les hypersurfaces lisses des vari\'et\'es
toriques. Cas g\'en\'eral | We demonstrate the Batyrev-Manin Conjecture for the number of points of
bounded height on hypersurfaces of some toric varieties.. The method used is
inspired by the one developed by Schindler for the study the case of
hypersurfaces of biprojective spaces. This method is based on the
Hardy-Littlewood circle method. The constant obtained in the final asymptotic
formula is the one conjectured by Peyre.
-----
Nous d\'emontrons la conjecture de Batyrev-Manin pour le nombre de points de
hauteur born\'ee sur les hypersurfaces de certaines vari\'et\'es toriques. La
m\'ethode utilis\'ee est inspir\'ee de celle d\'evelopp\'ee par Schindler pour
l'\'etude du cas des hypersurfaces des espaces biprojectifs. Cette m\'ethode
est bas\'ee sur la m\'ethode du cercle de Hardy-Littlewood. La constante
obtenue dans la formule asymptotique finale est celle conjectur\'ee par Peyre.
| math.NT | we demonstrate the batyrevmanin conjecture for the number of points of bounded height on hypersurfaces of some toric varieties the method used is inspired by the one developed by schindler for the study the case of hypersurfaces of biprojective spaces this method is based on the hardylittlewood circle method the constant obtained in the final asymptotic formula is the one conjectured by peyre nous demontrons la conjecture de batyrevmanin pour le nombre de points de hauteur bornee sur les hypersurfaces de certaines varietes toriques la methode utilisee est inspiree de celle developpee par schindler pour letude du cas des hypersurfaces des espaces biprojectifs cette methode est basee sur la methode du cercle de hardylittlewood la constante obtenue dans la formule asymptotique finale est celle conjecturee par peyre | [['we', 'demonstrate', 'the', 'batyrevmanin', 'conjecture', 'for', 'the', 'number', 'of', 'points', 'of', 'bounded', 'height', 'on', 'hypersurfaces', 'of', 'some', 'toric', 'varieties', 'the', 'method', 'used', 'is', 'inspired', 'by', 'the', 'one', 'developed', 'by', 'schindler', 'for', 'the', 'study', 'the', 'case', 'of', 'hypersurfaces', 'of', 'biprojective', 'spaces', 'this', 'method', 'is', 'based', 'on', 'the', 'hardylittlewood', 'circle', 'method', 'the', 'constant', 'obtained', 'in', 'the', 'final', 'asymptotic', 'formula', 'is', 'the', 'one', 'conjectured', 'by', 'peyre', 'nous', 'demontrons', 'la', 'conjecture', 'de', 'batyrevmanin', 'pour', 'le', 'nombre', 'de', 'points', 'de', 'hauteur', 'bornee', 'sur', 'les', 'hypersurfaces', 'de', 'certaines', 'varietes', 'toriques', 'la', 'methode', 'utilisee', 'est', 'inspiree', 'de', 'celle', 'developpee', 'par', 'schindler', 'pour', 'letude', 'du', 'cas', 'des', 'hypersurfaces', 'des', 'espaces', 'biprojectifs', 'cette', 'methode', 'est', 'basee', 'sur', 'la', 'methode', 'du', 'cercle', 'de', 'hardylittlewood', 'la', 'constante', 'obtenue', 'dans', 'la', 'formule', 'asymptotique', 'finale', 'est', 'celle', 'conjecturee', 'par', 'peyre']] | [-0.26102879248559474, -0.043579506395384666, -0.20249666951037942, 0.11233115139044822, -0.07113667503744364, -0.16148784348741174, -0.22327712523192167, 0.02842393385991454, -0.12776472025364638, -0.24190118032693864, 0.08366224611829966, -0.37653229981288316, -0.2334998036623001, 0.20778869282035156, -0.3605686531290412, -0.06703375323861838, -0.09966509540192783, -0.11408017536997796, 0.07423912306129933, -0.3928736629784107, 0.341896372679621, 0.15407929641008378, 0.3182357095181942, -0.04295208832994103, 0.22129638593643905, 0.20570748727023602, 0.12275209828093649, -0.18930585645139217, -0.3746340960264206, 0.08435918414592743, 0.3590278104506433, 0.1909621478319168, 0.23891453415900468, -0.3017749841362238, 0.023609080214053394, 0.1421567206318723, 0.10902411415427923, -0.0491993573307991, 0.03895092968828976, -0.4821219933312386, 0.17316193369030952, -0.18479073365172372, -0.12247740659164265, -0.02866429305728525, -0.1745885644108057, 0.06446214857883752, -0.19744871797040106, 0.1249270322099328, 0.053013803634792564, 0.18936652345210314, -0.03280695026554167, -0.29223441416025164, -0.21343690603226423, -0.0843121140487492, -0.12790914352051913, 0.1500016953032464, -0.021744908407330513, 0.11475219633243978, -0.044964981553610416, 0.21328770316392184, -0.16699177700281143, -0.0651798623278737, 0.10315029087406583, -0.10328026655782015, -0.30295939098671076, 0.05611009089904837, 0.014445522450376303, 0.2692434285134077, 0.22877228748053313, 0.40356130865588785, 0.004518182416679338, 0.06397585337888449, 0.3080163332745433, -0.14904442467354237, 0.08236343228630721, 0.0006906311996281147, -0.011924099792260676, -0.21429458386451006, -0.06123071954399347, 0.04912641390273347, -0.18431156941317023, -0.42596649461984637, -0.07261387855559588, 0.09986463242024184, -0.11161767050530762, -0.28640699103474615, 0.10164413377642631, -0.018284336760640143, 0.09950281887874007, 0.13297549277171491, 0.1060001269467175, -0.2170995227843523, -0.10023538707755505, 0.04570652896538377, 0.10829236509348265, 0.06428368767537176, 0.21900738643854856, -0.23477476240694523, -0.08206219070032239, 0.4252885985936737] |
1,802.02833 | Positivity and higher Teichm\"uller theory | We introduce $\Theta$-positivity, a new notion of positivity in real
semisimple Lie groups. The notion of $\Theta$-positivity generalizes at the
same time Lusztig's total positivity in split real Lie groups as well as well
known concepts of positivity in Lie groups of Hermitian type. We show that
there are two other families of Lie groups, SO(p,q) for p<q, and a family of
exceptional Lie groups, which admit a $\Theta$-positive structure. We describe
key aspects of $\Theta$-positivity and make a connection with representations
of surface groups and higher Teichm\"uller theory.
| math.DG math.GR math.GT | we introduce thetapositivity a new notion of positivity in real semisimple lie groups the notion of thetapositivity generalizes at the same time lusztigs total positivity in split real lie groups as well as well known concepts of positivity in lie groups of hermitian type we show that there are two other families of lie groups sopq for pq and a family of exceptional lie groups which admit a thetapositive structure we describe key aspects of thetapositivity and make a connection with representations of surface groups and higher teichmuller theory | [['we', 'introduce', 'thetapositivity', 'a', 'new', 'notion', 'of', 'positivity', 'in', 'real', 'semisimple', 'lie', 'groups', 'the', 'notion', 'of', 'thetapositivity', 'generalizes', 'at', 'the', 'same', 'time', 'lusztigs', 'total', 'positivity', 'in', 'split', 'real', 'lie', 'groups', 'as', 'well', 'as', 'well', 'known', 'concepts', 'of', 'positivity', 'in', 'lie', 'groups', 'of', 'hermitian', 'type', 'we', 'show', 'that', 'there', 'are', 'two', 'other', 'families', 'of', 'lie', 'groups', 'sopq', 'for', 'pq', 'and', 'a', 'family', 'of', 'exceptional', 'lie', 'groups', 'which', 'admit', 'a', 'thetapositive', 'structure', 'we', 'describe', 'key', 'aspects', 'of', 'thetapositivity', 'and', 'make', 'a', 'connection', 'with', 'representations', 'of', 'surface', 'groups', 'and', 'higher', 'teichmuller', 'theory']] | [-0.19935635739238933, 0.07966420822776854, -0.09449122116414153, 0.08082507474517281, -0.14026060029440982, -0.12025648855011571, -0.0015974908561805603, 0.3723419448572465, -0.29066365031758323, -0.28114601838487113, 0.10542929860027718, -0.19518459101461552, -0.20688322992646135, 0.1960161484312266, -0.12683664598840882, -0.06587656718594107, -0.003164200789549134, 0.1315901850043288, -0.13479708283557557, -0.27038799614158715, 0.4538951326764866, -0.05236059748990969, 0.24040413984436204, 0.01841874070338566, 0.11781691802157597, 0.002029778774489056, -0.040942800167778674, -0.025628169257701797, -0.09132134033122631, 0.1391222016060386, 0.3100200434657216, 0.07634477850197899, 0.21003549052031964, -0.33715267602184956, -0.16325800635174595, 0.186617453044164, 0.12770536049819467, 0.01615545417272105, -0.06260615825356747, -0.2719899749870158, 0.07906170393636619, -0.18613741419870744, -0.16215161489460364, -0.07102795197120444, 0.023138070034540513, 0.029255323024699464, -0.12418029212660092, 0.0791399650519121, 0.053953245750480244, 0.12817908932497216, -0.0866911211262711, -0.11660510307939892, -0.05692532002947039, 0.12974684158424762, -0.04098063602577895, -0.04845153905493631, 0.1060043684503233, -0.049109603102393026, -0.17712322261650115, 0.4322131867646187, -0.005674314304170283, -0.1894558856729418, 0.19255388222253797, -0.19295521430798213, -0.25105506635207514, 0.07847116798405875, 0.12335168074985797, 0.13987428392812778, -0.009825005217862781, 0.1543029690861162, -0.13716258818749338, 0.002371262735158036, 0.07827613232075237, 0.04005095146765763, 0.1345642444370738, 0.09409294782248749, 0.08889346314721149, 0.09424577923346078, 0.08572952323910696, -0.02982959923842414, -0.392889813456515, -0.21217627697412603, -0.07100219316568902, 0.09404298415492204, -0.09903764528098691, -0.19621404545614496, 0.40180857180067425, 0.05658419616520405, 0.20515758751637556, 0.15249834070114462, 0.15995888827918944, 0.026545477044154806, 0.1350064482328228, 0.05078418762423098, 0.11512785054616291, 0.2634983045916835, -0.05687012357256291, -0.1035100735660473, -0.07879810486900335, 0.17868452890119937] |
1,802.02834 | Exact algorithms for semidefinite programs with degenerate feasible set | Given symmetric matrices $A_0, A_1, \ldots, A_n$ of size $m$ with rational
entries, the set of real vectors $x = (x_1, \ldots, x_n)$ such that the matrix
$A_0 + x_1 A_1 + \cdots + x_n A_n$ has non-negative eigenvalues is called a
spectrahedron. Minimization of linear functions over spectrahedra is called
semidefinite programming. Such problems appear frequently in control theory and
real algebra, especially in the context of nonnegativity certificates for
multivariate polynomials based on sums of squares. Numerical software for
semidefinite programming are mostly based on interior point methods, assuming
non-degeneracy properties such as the existence of an interior point in the
spectrahedron. In this paper, we design an exact algorithm based on symbolic
homotopy for solving semidefinite programs without assumptions on the feasible
set, and we analyze its complexity. Because of the exactness of the output, it
cannot compete with numerical routines in practice. However, we prove that
solving such problems can be done in polynomial time if either $n$ or $m$ is
fixed.
| cs.SC | given symmetric matrices a_0 a_1 ldots a_n of size m with rational entries the set of real vectors x x_1 ldots x_n such that the matrix a_0 x_1 a_1 cdots x_n a_n has nonnegative eigenvalues is called a spectrahedron minimization of linear functions over spectrahedra is called semidefinite programming such problems appear frequently in control theory and real algebra especially in the context of nonnegativity certificates for multivariate polynomials based on sums of squares numerical software for semidefinite programming are mostly based on interior point methods assuming nondegeneracy properties such as the existence of an interior point in the spectrahedron in this paper we design an exact algorithm based on symbolic homotopy for solving semidefinite programs without assumptions on the feasible set and we analyze its complexity because of the exactness of the output it cannot compete with numerical routines in practice however we prove that solving such problems can be done in polynomial time if either n or m is fixed | [['given', 'symmetric', 'matrices', 'a_0', 'a_1', 'ldots', 'a_n', 'of', 'size', 'm', 'with', 'rational', 'entries', 'the', 'set', 'of', 'real', 'vectors', 'x', 'x_1', 'ldots', 'x_n', 'such', 'that', 'the', 'matrix', 'a_0', 'x_1', 'a_1', 'cdots', 'x_n', 'a_n', 'has', 'nonnegative', 'eigenvalues', 'is', 'called', 'a', 'spectrahedron', 'minimization', 'of', 'linear', 'functions', 'over', 'spectrahedra', 'is', 'called', 'semidefinite', 'programming', 'such', 'problems', 'appear', 'frequently', 'in', 'control', 'theory', 'and', 'real', 'algebra', 'especially', 'in', 'the', 'context', 'of', 'nonnegativity', 'certificates', 'for', 'multivariate', 'polynomials', 'based', 'on', 'sums', 'of', 'squares', 'numerical', 'software', 'for', 'semidefinite', 'programming', 'are', 'mostly', 'based', 'on', 'interior', 'point', 'methods', 'assuming', 'nondegeneracy', 'properties', 'such', 'as', 'the', 'existence', 'of', 'an', 'interior', 'point', 'in', 'the', 'spectrahedron', 'in', 'this', 'paper', 'we', 'design', 'an', 'exact', 'algorithm', 'based', 'on', 'symbolic', 'homotopy', 'for', 'solving', 'semidefinite', 'programs', 'without', 'assumptions', 'on', 'the', 'feasible', 'set', 'and', 'we', 'analyze', 'its', 'complexity', 'because', 'of', 'the', 'exactness', 'of', 'the', 'output', 'it', 'can', 'not', 'compete', 'with', 'numerical', 'routines', 'in', 'practice', 'however', 'we', 'prove', 'that', 'solving', 'such', 'problems', 'can', 'be', 'done', 'in', 'polynomial', 'time', 'if', 'either', 'n', 'or', 'm', 'is', 'fixed']] | [-0.16644199677897287, 0.05168155964019, -0.05098203705635173, 0.02953076116637858, -0.0894275069996669, -0.17715057625865244, -0.025887213181704283, 0.3677273104767218, -0.3824898593264855, -0.18430380089539874, 0.17947062057945762, -0.28272379044031987, -0.15718400368375554, 0.18230109230580918, -0.0890083284077286, 0.0948689594644156, 0.05648984058340154, 0.06250215432623778, -0.1362644343192695, -0.29456294543235534, 0.3263495870183102, -0.06453154184369862, 0.1707971053682255, 0.018064972218925966, 0.1441255559847673, 0.025241212522256775, 0.02570100552888096, -0.006263420100043888, -0.1034194602795478, 0.07542533962844522, 0.3364112074115525, 0.24160657448128461, 0.3210720506273896, -0.43338709397732844, -0.062218795376229874, 0.22124191455291642, 0.19044776133724425, -0.021339823133340735, -0.03637046059107899, -0.222852989505945, 0.14514321734717378, -0.094934961954246, -0.11132848033687939, -0.08424286493614454, 0.03286694387328223, 0.028830557588082194, -0.36650715522936606, 0.023575234781105094, 0.0453242109345695, 0.10285115896787014, -0.012703715481486834, -0.23810988432653477, 0.0013322298603555176, 0.02219505615081021, 0.023994711977629667, 0.010936627191622838, 0.08006491655472414, -0.020676947797311503, -0.137556678701215, 0.3555313488411391, 0.0026074835532087764, -0.2979205189775561, 0.09008461014550477, -0.13711594724513454, -0.16518965673467223, 0.10696095680429435, 0.1648987901398478, 0.19440999907081477, -0.07732278618253081, 0.20539222973001767, -0.1433575026393851, 0.1518532211854454, 0.09243623579943701, 0.0052473748786992, 0.1671157749598286, 0.09693786414037316, 0.10721641968352938, 0.08372475808997713, 0.05111963270918432, -0.0637007738810684, -0.318628387285705, -0.1117409589533277, -0.26168759002641667, 0.10172633476067189, -0.16197452936703596, -0.19640154132699492, 0.3302606883175968, 0.0967169189825654, 0.16947557786879547, 0.1340561706481353, 0.2695491527973359, 0.12388310103517945, 0.027190880315732555, 0.08792262460659343, 0.07662580046585642, 0.16709488316616214, 0.01911072115530974, -0.19101086104334405, 0.0864331328015106, 0.16395065493944552] |
1,802.02835 | Impurity-induced bound states as a signature of pairing symmetry in
multiband superconducting CeCu$_{2}$Si$_{2}$ | Multiband superconductivity with dominant two-gap features are recently
proposed to challenge the earlier accepted nodal $d$-wave pairing in the first
unconventional superconductor CeCu$_{2}$Si$_{2}$. Here we obtain multiband
Fermi-surface topology of CeCu$_{2}$Si$_{2}$ via first-principles calculations,
and study the problem within an effective two hybridization band model
including detailed band-structure. Within T-matrix approximation, our
calculations reveal that different pairing candidates could yield qualitatively
distinct features characterised by impurity-induced bound states. Except for
the nodeless $s^{\pm}$-wave, both loop-nodal $s$-wave and $d$-wave pairings can
give rise to intra-gap impurity bound states. In particular, the intra-gap
states for the $d_{x^2-y^2}$-wave and loop-nodal $s$-wave are distinguishable
and locate either near or far away from the Fermi energy, respectively. These
features can be readily verified by high-resolution scanning tunneling
microscopy/spectroscopy and provide an unambiguous justification for the
ongoing debate about the superconducting gap symmetry of CeCu$_{2}$Si$_{2}$ at
ambient pressure.
| cond-mat.supr-con | multiband superconductivity with dominant twogap features are recently proposed to challenge the earlier accepted nodal dwave pairing in the first unconventional superconductor cecu_2si_2 here we obtain multiband fermisurface topology of cecu_2si_2 via firstprinciples calculations and study the problem within an effective two hybridization band model including detailed bandstructure within tmatrix approximation our calculations reveal that different pairing candidates could yield qualitatively distinct features characterised by impurityinduced bound states except for the nodeless spmwave both loopnodal swave and dwave pairings can give rise to intragap impurity bound states in particular the intragap states for the d_x2y2wave and loopnodal swave are distinguishable and locate either near or far away from the fermi energy respectively these features can be readily verified by highresolution scanning tunneling microscopyspectroscopy and provide an unambiguous justification for the ongoing debate about the superconducting gap symmetry of cecu_2si_2 at ambient pressure | [['multiband', 'superconductivity', 'with', 'dominant', 'twogap', 'features', 'are', 'recently', 'proposed', 'to', 'challenge', 'the', 'earlier', 'accepted', 'nodal', 'dwave', 'pairing', 'in', 'the', 'first', 'unconventional', 'superconductor', 'cecu_2si_2', 'here', 'we', 'obtain', 'multiband', 'fermisurface', 'topology', 'of', 'cecu_2si_2', 'via', 'firstprinciples', 'calculations', 'and', 'study', 'the', 'problem', 'within', 'an', 'effective', 'two', 'hybridization', 'band', 'model', 'including', 'detailed', 'bandstructure', 'within', 'tmatrix', 'approximation', 'our', 'calculations', 'reveal', 'that', 'different', 'pairing', 'candidates', 'could', 'yield', 'qualitatively', 'distinct', 'features', 'characterised', 'by', 'impurityinduced', 'bound', 'states', 'except', 'for', 'the', 'nodeless', 'spmwave', 'both', 'loopnodal', 'swave', 'and', 'dwave', 'pairings', 'can', 'give', 'rise', 'to', 'intragap', 'impurity', 'bound', 'states', 'in', 'particular', 'the', 'intragap', 'states', 'for', 'the', 'd_x2y2wave', 'and', 'loopnodal', 'swave', 'are', 'distinguishable', 'and', 'locate', 'either', 'near', 'or', 'far', 'away', 'from', 'the', 'fermi', 'energy', 'respectively', 'these', 'features', 'can', 'be', 'readily', 'verified', 'by', 'highresolution', 'scanning', 'tunneling', 'microscopyspectroscopy', 'and', 'provide', 'an', 'unambiguous', 'justification', 'for', 'the', 'ongoing', 'debate', 'about', 'the', 'superconducting', 'gap', 'symmetry', 'of', 'cecu_2si_2', 'at', 'ambient', 'pressure']] | [-0.20179830634192578, 0.17376628654790077, -0.11160197454622724, 0.13046272045237498, -0.08365239653552711, -0.21628609879768756, 0.13791659141851353, 0.3547585915296968, -0.23624220375352029, -0.31678290376242935, -0.06564048958555337, -0.3627368554695916, -0.1002222686443596, 0.16403086779271842, 0.0852180840414752, 0.022379277687204976, -0.02554410071568039, -0.05756994148918827, -0.15890030786495501, -0.20690388829810308, 0.35786726893070087, 0.005418846816559073, 0.32649463253476146, 0.14006584429536278, -0.08683660844157279, -0.007205108228192049, 0.1325266601609617, -0.002988167387895732, -0.16926469057692833, 0.04729678439473222, 0.3652321090101933, -0.09871678948763128, 0.1413162016657404, -0.48631178175794404, -0.2437426541230156, -0.026942138081337785, 0.2022848094643002, 0.16837584993205176, -0.057414646509667516, -0.36217077229250694, 0.06258501266834365, -0.1672268840418735, -0.13438365740937666, -0.16649051752387428, -0.04647341536515406, -0.08341435073960153, -0.20226776465104604, 0.11966105812769481, 0.014590184853582735, 0.1005252573103603, -0.14491174399892104, -0.16718765895184076, -0.06476706870287184, -0.011544111702086168, 0.04497420086613922, 0.05813783280794102, 0.06452720471687326, -0.09425611532470343, -0.12772082208170438, 0.30013837698768353, -0.032024799227963766, -0.022553485395176938, 0.16058583421842523, -0.10065185270127906, -0.06202801447000984, 0.16520016814883745, 0.0356909648718601, 0.03573242015644751, -0.14704749384291574, 0.0636012435929266, -0.06818610415601296, 0.16012353892766043, 0.017679816002885377, 0.132202897565177, 0.26848233848626557, 0.17776033086013573, 0.021126870098720555, 0.07438897446345565, -0.1538001501721225, -0.047559487333350726, -0.2691827761255283, -0.10653902221435, -0.24737021620516522, 0.009169852962835469, -5.1107499760765795e-05, -0.16671331899395764, 0.3862341698127943, 0.12103028477720497, 0.2127974427790499, -0.08962352450569751, 0.21744238149742007, 0.10212400255964177, 0.05336860275637149, 0.08499569392600753, 0.2620353171877353, 0.11291409378156433, 0.005926040939094735, -0.3163421866565969, 0.08756964403191503, 0.016036114019249946] |
1,802.02836 | Convolutions of sets with bounded VC-dimension are uniformly continuous | We study a notion of VC-dimension for subsets of groups, defining this for a
set $A$ to be the VC-dimension of the family $\{ (xA) \cap A : x \in A\cdot
A^{-1} \}$. We show that if a finite subset $A$ of an abelian group has bounded
VC-dimension, then the convolution $1_A*1_{-A}$ is Bohr uniformly continuous,
in a quantitatively strong sense. This generalises and strengthens a version of
the stable arithmetic regularity lemma of Terry and Wolf in various ways. In
particular, it directly implies that the Polynomial Bogolyubov--Ruzsa
Conjecture -- a strong version of the Polynomial Freiman--Ruzsa Conjecture --
holds for sets with bounded VC-dimension. We also prove some results in the
non-abelian setting.
In some sense, this gives a structure theorem for translation-closed set
systems with bounded (classical) VC-dimension: if a VC-bounded family of
subsets of an abelian group is closed under translation, then each member has a
simple description in terms of Bohr sets, up to a small error.
| math.CO math.CA | we study a notion of vcdimension for subsets of groups defining this for a set a to be the vcdimension of the family xa cap a x in acdot a1 we show that if a finite subset a of an abelian group has bounded vcdimension then the convolution 1_a1_a is bohr uniformly continuous in a quantitatively strong sense this generalises and strengthens a version of the stable arithmetic regularity lemma of terry and wolf in various ways in particular it directly implies that the polynomial bogolyubovruzsa conjecture a strong version of the polynomial freimanruzsa conjecture holds for sets with bounded vcdimension we also prove some results in the nonabelian setting in some sense this gives a structure theorem for translationclosed set systems with bounded classical vcdimension if a vcbounded family of subsets of an abelian group is closed under translation then each member has a simple description in terms of bohr sets up to a small error | [['we', 'study', 'a', 'notion', 'of', 'vcdimension', 'for', 'subsets', 'of', 'groups', 'defining', 'this', 'for', 'a', 'set', 'a', 'to', 'be', 'the', 'vcdimension', 'of', 'the', 'family', 'xa', 'cap', 'a', 'x', 'in', 'acdot', 'a1', 'we', 'show', 'that', 'if', 'a', 'finite', 'subset', 'a', 'of', 'an', 'abelian', 'group', 'has', 'bounded', 'vcdimension', 'then', 'the', 'convolution', '1_a1_a', 'is', 'bohr', 'uniformly', 'continuous', 'in', 'a', 'quantitatively', 'strong', 'sense', 'this', 'generalises', 'and', 'strengthens', 'a', 'version', 'of', 'the', 'stable', 'arithmetic', 'regularity', 'lemma', 'of', 'terry', 'and', 'wolf', 'in', 'various', 'ways', 'in', 'particular', 'it', 'directly', 'implies', 'that', 'the', 'polynomial', 'bogolyubovruzsa', 'conjecture', 'a', 'strong', 'version', 'of', 'the', 'polynomial', 'freimanruzsa', 'conjecture', 'holds', 'for', 'sets', 'with', 'bounded', 'vcdimension', 'we', 'also', 'prove', 'some', 'results', 'in', 'the', 'nonabelian', 'setting', 'in', 'some', 'sense', 'this', 'gives', 'a', 'structure', 'theorem', 'for', 'translationclosed', 'set', 'systems', 'with', 'bounded', 'classical', 'vcdimension', 'if', 'a', 'vcbounded', 'family', 'of', 'subsets', 'of', 'an', 'abelian', 'group', 'is', 'closed', 'under', 'translation', 'then', 'each', 'member', 'has', 'a', 'simple', 'description', 'in', 'terms', 'of', 'bohr', 'sets', 'up', 'to', 'a', 'small', 'error']] | [-0.15665112705538412, 0.1034165777301177, -0.09253405889967917, 0.07079304598329299, -0.06416904135960964, -0.10854583853771063, 0.06990991082411356, 0.3191650269262783, -0.3254519142966427, -0.17970020639673842, 0.08481153623993182, -0.2386813840614148, -0.11433149231658257, 0.22512536602058483, -0.17457958391577297, -0.006743351110202781, 0.04929008475178248, 0.10649764060962026, -0.06621613662898565, -0.30309411713569245, 0.35135221077913914, -0.0892246177649827, 0.21243982666547034, 0.06796784222076115, 0.1143869604505659, 0.005627887190452644, 0.03924275905063206, 0.056638975062274506, -0.14543729113740317, 0.13600099043408106, 0.24489614836774865, 0.11514011023765695, 0.33621081941029324, -0.30689766690703474, -0.1691783380349977, 0.1955971117494265, 0.08961183532721714, 0.06350633205071866, -0.04256643830683663, -0.26278002959276947, 0.15520057627665146, -0.17518166036574873, -0.18140618876227504, -0.05019915336742997, 0.11131305910356633, 0.017571503369821016, -0.3081412725290435, 0.008301686257987235, 0.16766965698886227, 0.0934032254229457, -0.053620883838164726, -0.07021129052698999, 0.022667578286219195, 0.0405355272149401, -0.006440508932286463, 0.10530655132455437, 0.024312495764998065, -0.08076374054366312, -0.11525705192606993, 0.3648008205164405, -0.07308818941766565, -0.24605618959123438, 0.14023031377802034, -0.16776005326250157, -0.20783899335626077, 0.0647323641672053, 0.10496554740208697, 0.13974610255583636, -0.08059851464236385, 0.2123515362202722, -0.21412725489610782, 0.15780444572643412, 0.11959157943386924, 0.05653783109934105, 0.09390782286691202, 0.1253810917048461, 0.12767733537362186, 0.16954693587137049, 0.021607832671687394, -0.03317269410744503, -0.3548299843239804, -0.1555021125399931, -0.17191773333115043, 0.10120679413923969, -0.11036859932427398, -0.21751442348717578, 0.3599549912871769, 0.07250812353207972, 0.19313970151869125, 0.1437540035861145, 0.18860251422632823, 0.07460460001349528, 0.032854278268770305, 0.11871258448053441, 0.12839234827499074, 0.17890550231548968, -0.034361150236679364, -0.10687188073605686, 0.04260569166803321, 0.18924965538084884] |
1,802.02837 | Representations of Compact Lie Groups of Low Cohomogeneity | We survey different tools to classify representations of compact Lie groups
according to their cohomogeneity and apply these methods to the case of
irreducible representations of cohomogeneity 6, 7 and 8.
| math.RT | we survey different tools to classify representations of compact lie groups according to their cohomogeneity and apply these methods to the case of irreducible representations of cohomogeneity 6 7 and 8 | [['we', 'survey', 'different', 'tools', 'to', 'classify', 'representations', 'of', 'compact', 'lie', 'groups', 'according', 'to', 'their', 'cohomogeneity', 'and', 'apply', 'these', 'methods', 'to', 'the', 'case', 'of', 'irreducible', 'representations', 'of', 'cohomogeneity', '6', '7', 'and', '8']] | [-0.08573180821634108, 0.03767807298009434, -0.07930940371607581, 0.06560392737869293, -0.1704656648780069, -0.13151487416677898, -0.007132130825231152, 0.4514089457450374, -0.22757745504138932, -0.3308824379627983, 0.16786836747140174, -0.3180430094381013, -0.12079275402450754, 0.2054663187253379, -0.11085238346769925, -0.0692819447046326, 0.03387979012463362, 0.11465019342159072, -0.14073645757631428, -0.4117315906670786, 0.4740807650490634, -0.09004227708904974, 0.22596651148952304, -0.05934125139948822, 0.1359416602720176, -0.024009869734366095, -0.117644663359369, -0.080519424670896, -0.11991463781845185, 0.22155681875864824, 0.36017070578471305, 0.06664974017128829, 0.14484275924041867, -0.35255852581993224, -0.12466623291613595, 0.20578592655158812, 0.19011075121741142, 0.09041440462873827, 0.05170111520396125, -0.3110423107826782, 0.16579142957925797, -0.21372314626651426, -0.15185765711770904, -0.11726274563660545, 0.040750383369384274, -0.011997341268485593, -0.11470860845199035, 0.004281265841376397, 0.0847405397122906, 0.10211308531823658, -0.1843561088486064, -0.1458470384560285, -0.02451691318363432, 0.2081464471655988, -0.005824385331042351, -0.0034425827794738353, 0.1295312640948161, -0.07396890301137202, -0.20501965985843731, 0.38986187356133617, 0.01097745989118853, -0.21983915639500465, 0.34824671355947373, -0.15926710552265566, -0.20882479858494574, 0.13273976779648014, 0.22954299745540466, 0.1614449141366828, -0.09136119360224373, 0.031864184176459184, 0.03168744485705129, 0.0647611677150933, 0.08427801409796361, -0.056612403222149416, 0.12607804637762807, 0.07061644451272103, 0.040678938400120504, 0.09259048213941916, -0.04216174330682524, 0.07316319332007439, -0.30888478590115426, -0.14203540611291124, -0.039787872544219414, 0.11191640277543376, -0.10889602605640257, -0.08341467919038428, 0.4393832386741715, 0.12251773013943626, 0.15515769820570224, 0.12642277864318702, 0.18230475293051812, -0.0726949595771129, 0.0805503238938869, 0.09508298968355502, 0.13571616376359616, 0.24348416636067052, -0.04958004113887587, -0.05411559481534266, -0.2131174691171656, 0.12666798503168167] |
1,802.02838 | Temperature-induced inversion of the spin-photogalvanic effect in
WTe$_2$ and MoTe$_2$ | We investigate the generation and temperature-induced evolution of
optically-driven spin photocurrents in WTe$_2$ and MoTe$_2$. By correlating the
scattering-plane dependence of the spin photocurrents with the symmetry
analysis, we find that a sizeable spin photocurrent can be controllably driven
along the chain direction by optically exciting the system in the high-symmetry
$y$-$z$ plane. Temperature dependence measurements show that pronounced
variations in the spin photocurrent emerge at temperatures that coincide with
the onset of anomalies in their transport and optical properties. The
decreasing trend in the temperature dependence starting below 150 K is
attributed to the temperature-induced Lifshitz transition. The sign inversion
of the spin photocurrent, observed around 50 K in WTe$_2$ and around 120 K in
MoTe$_2$, may have its origin in an interaction that involves multiple kinds of
carriers.
| cond-mat.mtrl-sci | we investigate the generation and temperatureinduced evolution of opticallydriven spin photocurrents in wte_2 and mote_2 by correlating the scatteringplane dependence of the spin photocurrents with the symmetry analysis we find that a sizeable spin photocurrent can be controllably driven along the chain direction by optically exciting the system in the highsymmetry yz plane temperature dependence measurements show that pronounced variations in the spin photocurrent emerge at temperatures that coincide with the onset of anomalies in their transport and optical properties the decreasing trend in the temperature dependence starting below 150 k is attributed to the temperatureinduced lifshitz transition the sign inversion of the spin photocurrent observed around 50 k in wte_2 and around 120 k in mote_2 may have its origin in an interaction that involves multiple kinds of carriers | [['we', 'investigate', 'the', 'generation', 'and', 'temperatureinduced', 'evolution', 'of', 'opticallydriven', 'spin', 'photocurrents', 'in', 'wte_2', 'and', 'mote_2', 'by', 'correlating', 'the', 'scatteringplane', 'dependence', 'of', 'the', 'spin', 'photocurrents', 'with', 'the', 'symmetry', 'analysis', 'we', 'find', 'that', 'a', 'sizeable', 'spin', 'photocurrent', 'can', 'be', 'controllably', 'driven', 'along', 'the', 'chain', 'direction', 'by', 'optically', 'exciting', 'the', 'system', 'in', 'the', 'highsymmetry', 'yz', 'plane', 'temperature', 'dependence', 'measurements', 'show', 'that', 'pronounced', 'variations', 'in', 'the', 'spin', 'photocurrent', 'emerge', 'at', 'temperatures', 'that', 'coincide', 'with', 'the', 'onset', 'of', 'anomalies', 'in', 'their', 'transport', 'and', 'optical', 'properties', 'the', 'decreasing', 'trend', 'in', 'the', 'temperature', 'dependence', 'starting', 'below', '150', 'k', 'is', 'attributed', 'to', 'the', 'temperatureinduced', 'lifshitz', 'transition', 'the', 'sign', 'inversion', 'of', 'the', 'spin', 'photocurrent', 'observed', 'around', '50', 'k', 'in', 'wte_2', 'and', 'around', '120', 'k', 'in', 'mote_2', 'may', 'have', 'its', 'origin', 'in', 'an', 'interaction', 'that', 'involves', 'multiple', 'kinds', 'of', 'carriers']] | [-0.19504316914249067, 0.25786380874556614, -0.048736041487562796, -0.013763865870207028, -0.01969009860916886, -0.11052334288409514, 0.07871443131043351, 0.43896496012922404, -0.2928199597432228, -0.3115779137339934, 0.00989752023863469, -0.3434491303799919, -0.11031629207323833, 0.17712904247202615, 0.08678165582810031, -0.033755976986952214, -0.06881033308630766, -0.05202192964813809, -0.129271291849716, -0.1498721225878455, 0.2593945141073114, 0.019782003989919673, 0.31065012059217795, 0.09031619588923893, 0.0465932491365387, -0.002483711330766759, 0.09279737698795028, -0.0022497539112503215, -0.11986439663654215, -0.012382167463674564, 0.2353938581794681, -0.1051512327859207, 0.17291700062450283, -0.39953143221809884, -0.19916536407761795, 0.02709458338984743, 0.14095883526254532, 0.12734925007815798, -0.10337431945900302, -0.24419979386522558, 0.054722443468464436, -0.08915207978579859, -0.1480929892439785, -0.04911171218430869, 0.019579729751156745, -0.028670187036023122, -0.18714492185431164, 0.13920004047135742, 0.06733719595931759, 0.1166236039017356, -0.08020611354348416, -0.11785083613087705, -0.13529205085825205, 0.04834324804445108, 0.08830603998147182, 0.04911983681683855, 0.19374030245902998, -0.09147910471976728, -0.14837706831190012, 0.3340143804590023, -0.13608573810395952, -0.043771015126402524, 0.1341836475334022, -0.267261714486824, -0.09153941975069023, 0.22856081972736142, 0.11569139837150196, 0.10674283296671198, -0.12145401155864892, 0.04216471699052021, 0.007953049907417492, 0.1448735490787861, 0.06231179513044424, 0.08713910746200429, 0.3149927135470302, 0.144286253828873, 0.03005866407662226, 0.13036142553062027, -0.16018734202366466, -0.03962590739982881, -0.21193781055468533, -0.13739883006990763, -0.1947169954493252, 0.08815722177689533, -0.08304890981593797, -0.11310087311146565, 0.4497813232560722, 0.1896844652764364, 0.2275734553709193, -0.04187789114820229, 0.2020102962454449, 0.13889815445263806, 0.10263254528309312, 0.04237114340915207, 0.271726172713404, 0.16915548513029782, 0.1404092479388901, -0.35538688413311487, 0.10241174926735865, -0.06459195621658204] |
1,802.02839 | QTT-isogeometric solver in two dimensions | The goal of this paper is to develop a numerical algorithm that solves a
two-dimensional elliptic partial differential equation in a polygonal domain
using tensor methods and ideas from isogeometric analysis. The proposed
algorithm is based on the Finite Element (FE) approximation with Quantized
Tensor Train decomposition (QTT) used for matrix representation and solution
approximation. In this paper we propose a special discretisation scheme that
allows to construct the global stiffness matrix in the QTT-format. The
algorithm has $O(\log n)$ complexity, where $n=2^d$ is the number of nodes per
quadrangle side. A new operation called z-kron is introduced for QTT-format. It
makes it possible to build a matrix in z-order if the matrix can be expressed
in terms of Kronecker products and sums. An algorithm for building a QTT
coefficient matrix for FEM in z-order "on the fly", as opposed to the
transformation of a calculated matrix into QTT, is presented. This algorithm
has $O(\log n)$ complexity for $n$ as above.
| math.NA | the goal of this paper is to develop a numerical algorithm that solves a twodimensional elliptic partial differential equation in a polygonal domain using tensor methods and ideas from isogeometric analysis the proposed algorithm is based on the finite element fe approximation with quantized tensor train decomposition qtt used for matrix representation and solution approximation in this paper we propose a special discretisation scheme that allows to construct the global stiffness matrix in the qttformat the algorithm has olog n complexity where n2d is the number of nodes per quadrangle side a new operation called zkron is introduced for qttformat it makes it possible to build a matrix in zorder if the matrix can be expressed in terms of kronecker products and sums an algorithm for building a qtt coefficient matrix for fem in zorder on the fly as opposed to the transformation of a calculated matrix into qtt is presented this algorithm has olog n complexity for n as above | [['the', 'goal', 'of', 'this', 'paper', 'is', 'to', 'develop', 'a', 'numerical', 'algorithm', 'that', 'solves', 'a', 'twodimensional', 'elliptic', 'partial', 'differential', 'equation', 'in', 'a', 'polygonal', 'domain', 'using', 'tensor', 'methods', 'and', 'ideas', 'from', 'isogeometric', 'analysis', 'the', 'proposed', 'algorithm', 'is', 'based', 'on', 'the', 'finite', 'element', 'fe', 'approximation', 'with', 'quantized', 'tensor', 'train', 'decomposition', 'qtt', 'used', 'for', 'matrix', 'representation', 'and', 'solution', 'approximation', 'in', 'this', 'paper', 'we', 'propose', 'a', 'special', 'discretisation', 'scheme', 'that', 'allows', 'to', 'construct', 'the', 'global', 'stiffness', 'matrix', 'in', 'the', 'qttformat', 'the', 'algorithm', 'has', 'olog', 'n', 'complexity', 'where', 'n2d', 'is', 'the', 'number', 'of', 'nodes', 'per', 'quadrangle', 'side', 'a', 'new', 'operation', 'called', 'zkron', 'is', 'introduced', 'for', 'qttformat', 'it', 'makes', 'it', 'possible', 'to', 'build', 'a', 'matrix', 'in', 'zorder', 'if', 'the', 'matrix', 'can', 'be', 'expressed', 'in', 'terms', 'of', 'kronecker', 'products', 'and', 'sums', 'an', 'algorithm', 'for', 'building', 'a', 'qtt', 'coefficient', 'matrix', 'for', 'fem', 'in', 'zorder', 'on', 'the', 'fly', 'as', 'opposed', 'to', 'the', 'transformation', 'of', 'a', 'calculated', 'matrix', 'into', 'qtt', 'is', 'presented', 'this', 'algorithm', 'has', 'olog', 'n', 'complexity', 'for', 'n', 'as', 'above']] | [-0.0925961179983702, 0.04623780851053094, -0.08567337117075355, 0.00031044846400618553, -0.09118396366498421, -0.15093016695184044, 0.02160362558309696, 0.3646160702963796, -0.3034839419105762, -0.2522695905917996, 0.11753806903150782, -0.24833583957053312, -0.19818019086960703, 0.13909233293696482, -0.06883401989559584, 0.08514218864950669, 0.06476943550301315, 0.05413580464812208, -0.09462065521452305, -0.2460289122124167, 0.2820562906150671, 0.021484266011680984, 0.25757275559129694, 0.026547156787135557, 0.14998670457567595, 0.014236961705079655, -0.028464128888106045, 0.017085371132279877, -0.07254980324704532, 0.12567088558026177, 0.2933890837041331, 0.15064306881962508, 0.27085560140541837, -0.4233112492704693, -0.13976603988933825, 0.10771614079042396, 0.17292134893418562, 0.1120670900880536, -0.015310654837396468, -0.2073439475196072, 0.12464646721859993, -0.1831893191293038, -0.10397845366085538, -0.09683814912274055, 0.016012957213517233, -0.03657677257138811, -0.34734427819361535, 0.015526648974881464, 0.02481404423147817, -0.014247211903227563, -0.019565282826079056, -0.15284048007282464, 0.0669884785119727, 0.0667147743486198, -0.019820369044731407, 0.042047084474205215, 0.04266069200526498, -0.03880177475246778, -0.09512698569090423, 0.3902252487649646, -0.08262036889688336, -0.2845974681365504, 0.0713907361510976, -0.06731352365068809, -0.13308086020494753, 0.13581161169538605, 0.19356889580229086, 0.13933427460621334, -0.0933682853650726, 0.13927131411921576, -0.09051448008917932, 0.17571102784610576, 0.05726826967247113, -0.05179519004069116, 0.05091113295064225, 0.18350339937023818, 0.10974082281471148, 0.156052190965908, -0.0367798212259165, -0.07064486022108776, -0.2883306347368627, -0.20702462493665988, -0.24254000036464415, 0.025259035766932263, -0.13885087078307162, -0.21867316906396417, 0.3808244209953897, 0.10956580092823959, 0.2018491561661616, 0.08505192221602119, 0.31724511878712314, 0.13104117525700196, 0.06056109063294709, 0.10809064439875132, 0.1386127677367399, 0.1962052142716166, 0.078530365931271, -0.2013854989678823, 0.06555210108002293, 0.22229061160484165] |
1,802.0284 | Neural Network Renormalization Group | We present a variational renormalization group (RG) approach using a deep
generative model based on normalizing flows. The model performs hierarchical
change-of-variables transformations from the physical space to a latent space
with reduced mutual information. Conversely, the neural net directly maps
independent Gaussian noises to physical configurations following the inverse RG
flow. The model has an exact and tractable likelihood, which allows unbiased
training and direct access to the renormalized energy function of the latent
variables. To train the model, we employ probability density distillation for
the bare energy function of the physical problem, in which the training loss
provides a variational upper bound of the physical free energy. We demonstrate
practical usage of the approach by identifying mutually independent collective
variables of the Ising model and performing accelerated hybrid Monte Carlo
sampling in the latent space. Lastly, we comment on the connection of the
present approach to the wavelet formulation of RG and the modern pursuit of
information preserving RG.
| cond-mat.stat-mech cs.LG stat.ML | we present a variational renormalization group rg approach using a deep generative model based on normalizing flows the model performs hierarchical changeofvariables transformations from the physical space to a latent space with reduced mutual information conversely the neural net directly maps independent gaussian noises to physical configurations following the inverse rg flow the model has an exact and tractable likelihood which allows unbiased training and direct access to the renormalized energy function of the latent variables to train the model we employ probability density distillation for the bare energy function of the physical problem in which the training loss provides a variational upper bound of the physical free energy we demonstrate practical usage of the approach by identifying mutually independent collective variables of the ising model and performing accelerated hybrid monte carlo sampling in the latent space lastly we comment on the connection of the present approach to the wavelet formulation of rg and the modern pursuit of information preserving rg | [['we', 'present', 'a', 'variational', 'renormalization', 'group', 'rg', 'approach', 'using', 'a', 'deep', 'generative', 'model', 'based', 'on', 'normalizing', 'flows', 'the', 'model', 'performs', 'hierarchical', 'changeofvariables', 'transformations', 'from', 'the', 'physical', 'space', 'to', 'a', 'latent', 'space', 'with', 'reduced', 'mutual', 'information', 'conversely', 'the', 'neural', 'net', 'directly', 'maps', 'independent', 'gaussian', 'noises', 'to', 'physical', 'configurations', 'following', 'the', 'inverse', 'rg', 'flow', 'the', 'model', 'has', 'an', 'exact', 'and', 'tractable', 'likelihood', 'which', 'allows', 'unbiased', 'training', 'and', 'direct', 'access', 'to', 'the', 'renormalized', 'energy', 'function', 'of', 'the', 'latent', 'variables', 'to', 'train', 'the', 'model', 'we', 'employ', 'probability', 'density', 'distillation', 'for', 'the', 'bare', 'energy', 'function', 'of', 'the', 'physical', 'problem', 'in', 'which', 'the', 'training', 'loss', 'provides', 'a', 'variational', 'upper', 'bound', 'of', 'the', 'physical', 'free', 'energy', 'we', 'demonstrate', 'practical', 'usage', 'of', 'the', 'approach', 'by', 'identifying', 'mutually', 'independent', 'collective', 'variables', 'of', 'the', 'ising', 'model', 'and', 'performing', 'accelerated', 'hybrid', 'monte', 'carlo', 'sampling', 'in', 'the', 'latent', 'space', 'lastly', 'we', 'comment', 'on', 'the', 'connection', 'of', 'the', 'present', 'approach', 'to', 'the', 'wavelet', 'formulation', 'of', 'rg', 'and', 'the', 'modern', 'pursuit', 'of', 'information', 'preserving', 'rg']] | [-0.09431692291201549, 0.08708895913620628, -0.13521619763959963, 0.08194227903009021, -0.09813912651322274, -0.11801495734220428, 0.10453658016768765, 0.393564434184097, -0.3068096564608331, -0.30136671553001454, 0.056284232503265974, -0.24196066912880054, -0.15520594194704979, 0.1355204028091885, -0.029931524531302614, 0.11267896512558001, 0.05263345731242982, 0.038924795205224745, -0.12536497611511985, -0.2190172227297661, 0.31945927354929426, 0.08386249517315496, 0.32033058680501414, -0.02305498686098488, 0.1672541364231682, 0.05035984479266896, -0.06339419556793219, -0.03346011791033352, -0.13358141546808647, 0.1730366481680666, 0.2076357014676822, 0.15243114971601684, 0.2960775089710488, -0.3983413718600312, -0.2703686183074819, 0.10354522092742209, 0.12259133818113933, 0.11132417790886733, 0.0013469905239639815, -0.2858692887210235, 0.005889683976329817, -0.19359089193796242, -0.0662572120131219, -0.13579901807901004, -0.061045569703214286, -0.015619163956024586, -0.3171973171476159, 0.10247581285534438, 0.02738399084611154, 0.02015655975255924, -0.04772963609961469, -0.10037445817547648, -0.03825338718897854, 0.10760076671422268, 0.04213191760755983, 0.03519090328521749, 0.1371667657046787, -0.1338385795069546, -0.10228899987240941, 0.31950262191803747, -0.06405720624476903, -0.2406371123047534, 0.16701453276157888, -0.0460709758444186, -0.14583565214047242, 0.10300553250104848, 0.19913084342098153, 0.10994152359950779, -0.1878524180942776, 0.08345968024197804, -0.06079749445219796, 0.13150613167849573, -0.03300965501874778, 0.0006142721037085382, 0.14837465538521824, 0.18893329399639325, 0.05922401132443862, 0.15835438117165096, -0.10967479534996731, -0.1474938878647821, -0.29863002780616654, -0.13004031861367235, -0.22420427834858064, 0.02708332747892008, -0.16879262182422658, -0.18376308026064117, 0.40632319174163184, 0.21846191780005367, 0.19301198981123865, 0.08766794151348865, 0.3147898652454873, 0.11807982996684609, 0.044947602499785445, 0.1222352903851117, 0.18418149296078623, 0.12817474827604217, 0.04884549053328008, -0.23226679767400998, 0.03257719375864134, 0.12204687809427009] |
1,802.02841 | Nitrogen isotope fractionation in protoplanetary disks | Aims: The two stable isotopes of nitrogen, 14N and 15N, exhibit a range of
abundance ratios both inside and outside the solar system. The elemental ratio
in the solar neighborhood is 440. Recent ALMA observations showed HCN/HC15N
ratios from 83 to 156 in six T Tauri and Herbig disks and a CN/C15 N ratio of
323 +/- 30 in one T Tauri star. We aim to determine the dominant mechanism
responsible for these enhancements of 15N: low-temperature exchange reactions
or isotope-selective photodissociation of N2.
Methods: Using the thermochemical code DALI, we model the nitrogen isotope
chemistry in circumstellar disks with a 2D axisymmetric geometry. Our chemical
network is the first to include both fractionation mechanisms for nitrogen. The
model produces abundance profiles and isotope ratios for several key N-bearing
species. We study how these isotope ratios depend on various disk parameters.
Results: The formation of CN and HCN is closely coupled to the vibrational
excitation of H2 in the UV-irradiated surface layers of the disk. Isotope
fractionation is completely dominated by isotope-selective photodissociation of
N2. The column density ratio of HCN over HC15N in the disk's inner 100 au does
not depend strongly on the disk mass, the flaring angle or the stellar
spectrum, but it is sensitive to the grain size distribution. For larger
grains, self-shielding of N2 becomes more important relative to dust
extinction, leading to stronger isotope fractionation. Between disk radii of
~50 and 200 au, the models predict HCN/HC15N and CN/C15N abundance ratios
consistent with observations of disks and comets. The HCN/HC15N and CN/C15N
column density ratios in the models are a factor of 2-3 higher than those
inferred from the ALMA observations.
| astro-ph.SR astro-ph.GA | aims the two stable isotopes of nitrogen 14n and 15n exhibit a range of abundance ratios both inside and outside the solar system the elemental ratio in the solar neighborhood is 440 recent alma observations showed hcnhc15n ratios from 83 to 156 in six t tauri and herbig disks and a cnc15 n ratio of 323 30 in one t tauri star we aim to determine the dominant mechanism responsible for these enhancements of 15n lowtemperature exchange reactions or isotopeselective photodissociation of n2 methods using the thermochemical code dali we model the nitrogen isotope chemistry in circumstellar disks with a 2d axisymmetric geometry our chemical network is the first to include both fractionation mechanisms for nitrogen the model produces abundance profiles and isotope ratios for several key nbearing species we study how these isotope ratios depend on various disk parameters results the formation of cn and hcn is closely coupled to the vibrational excitation of h2 in the uvirradiated surface layers of the disk isotope fractionation is completely dominated by isotopeselective photodissociation of n2 the column density ratio of hcn over hc15n in the disks inner 100 au does not depend strongly on the disk mass the flaring angle or the stellar spectrum but it is sensitive to the grain size distribution for larger grains selfshielding of n2 becomes more important relative to dust extinction leading to stronger isotope fractionation between disk radii of 50 and 200 au the models predict hcnhc15n and cnc15n abundance ratios consistent with observations of disks and comets the hcnhc15n and cnc15n column density ratios in the models are a factor of 23 higher than those inferred from the alma observations | [['aims', 'the', 'two', 'stable', 'isotopes', 'of', 'nitrogen', '14n', 'and', '15n', 'exhibit', 'a', 'range', 'of', 'abundance', 'ratios', 'both', 'inside', 'and', 'outside', 'the', 'solar', 'system', 'the', 'elemental', 'ratio', 'in', 'the', 'solar', 'neighborhood', 'is', '440', 'recent', 'alma', 'observations', 'showed', 'hcnhc15n', 'ratios', 'from', '83', 'to', '156', 'in', 'six', 't', 'tauri', 'and', 'herbig', 'disks', 'and', 'a', 'cnc15', 'n', 'ratio', 'of', '323', '30', 'in', 'one', 't', 'tauri', 'star', 'we', 'aim', 'to', 'determine', 'the', 'dominant', 'mechanism', 'responsible', 'for', 'these', 'enhancements', 'of', '15n', 'lowtemperature', 'exchange', 'reactions', 'or', 'isotopeselective', 'photodissociation', 'of', 'n2', 'methods', 'using', 'the', 'thermochemical', 'code', 'dali', 'we', 'model', 'the', 'nitrogen', 'isotope', 'chemistry', 'in', 'circumstellar', 'disks', 'with', 'a', '2d', 'axisymmetric', 'geometry', 'our', 'chemical', 'network', 'is', 'the', 'first', 'to', 'include', 'both', 'fractionation', 'mechanisms', 'for', 'nitrogen', 'the', 'model', 'produces', 'abundance', 'profiles', 'and', 'isotope', 'ratios', 'for', 'several', 'key', 'nbearing', 'species', 'we', 'study', 'how', 'these', 'isotope', 'ratios', 'depend', 'on', 'various', 'disk', 'parameters', 'results', 'the', 'formation', 'of', 'cn', 'and', 'hcn', 'is', 'closely', 'coupled', 'to', 'the', 'vibrational', 'excitation', 'of', 'h2', 'in', 'the', 'uvirradiated', 'surface', 'layers', 'of', 'the', 'disk', 'isotope', 'fractionation', 'is', 'completely', 'dominated', 'by', 'isotopeselective', 'photodissociation', 'of', 'n2', 'the', 'column', 'density', 'ratio', 'of', 'hcn', 'over', 'hc15n', 'in', 'the', 'disks', 'inner', '100', 'au', 'does', 'not', 'depend', 'strongly', 'on', 'the', 'disk', 'mass', 'the', 'flaring', 'angle', 'or', 'the', 'stellar', 'spectrum', 'but', 'it', 'is', 'sensitive', 'to', 'the', 'grain', 'size', 'distribution', 'for', 'larger', 'grains', 'selfshielding', 'of', 'n2', 'becomes', 'more', 'important', 'relative', 'to', 'dust', 'extinction', 'leading', 'to', 'stronger', 'isotope', 'fractionation', 'between', 'disk', 'radii', 'of', '50', 'and', '200', 'au', 'the', 'models', 'predict', 'hcnhc15n', 'and', 'cnc15n', 'abundance', 'ratios', 'consistent', 'with', 'observations', 'of', 'disks', 'and', 'comets', 'the', 'hcnhc15n', 'and', 'cnc15n', 'column', 'density', 'ratios', 'in', 'the', 'models', 'are', 'a', 'factor', 'of', '23', 'higher', 'than', 'those', 'inferred', 'from', 'the', 'alma', 'observations']] | [-0.03762199983043088, 0.17136872643774206, 0.02102850083224687, 0.04580671750728718, 0.05119778683366762, -0.09224840662696145, 0.04050304746001281, 0.41386959815905855, -0.1765174344800074, -0.3414614576846361, 0.01541887218428945, -0.27966003172607584, -0.007298587876456705, 0.11691591174765066, -0.011316978223621845, 0.00015922473785890775, 0.03411967823874544, -0.09889792699620804, -0.0319779100861739, -0.21698489095507698, 0.2762159184256399, 0.11987660492177714, 0.14433336861262266, 0.062111982258502396, -0.029561145780608058, -0.16512949497100304, -0.041802376175129954, -0.058203173673881045, -0.1837865396114913, 0.09066381467590955, 0.23849097723768367, 0.10902387852865186, 0.11156164510937577, -0.4096410772035068, -0.19654512198133903, 0.05922035189731766, 0.15512459209612148, 0.045885764164850115, -0.016064157105230896, -0.17200251339426773, 0.04889918147501621, -0.16513741459697484, -0.13424078642983328, 0.04826002304632725, 0.07957728603431447, 0.0070113937065682625, -0.28009490089152345, 0.0932475346089764, 0.027246564268690154, 0.12617827355607666, -0.1431296048338779, -0.2203272843259302, -0.10062856816813688, 0.06995087400502102, 0.014858640114861456, 0.024526460816745053, 0.26916334503414957, -0.10086361991834233, -0.0038747116923332214, 0.4246401070854203, -0.1492828362818744, -0.05730575418946418, 0.2540916928208687, -0.23472028165209022, -0.19661557733885604, 0.22505895680324597, 0.11250605917112394, 0.18113700945618225, -0.10667105576108125, 0.002016989568841051, -0.03761791645718569, 0.22923709331440148, 0.09183565793220293, 0.0399195712635463, 0.2837022991055115, 0.11342981470918113, 0.02064023223028264, 0.0784180673116564, -0.22807017451490869, -0.11209917152469809, -0.1712405637994578, -0.16514607753096655, -0.07171114071737975, 0.08163297942675524, -0.1546028963758991, -0.09939542461662892, 0.2841132459781048, 0.10598696860823442, 0.26133858162475837, -0.0015860058824447069, 0.28607773274183274, 0.05102558912751688, 0.10011234679989602, 0.09672260682013901, 0.2724524364544248, 0.21774412801489235, 0.10774156608999791, -0.29435639857399193, 0.15938615808983078, 0.01627260925925591] |
1,802.02842 | Path integrals for mean-field equations in nonlinear dynamos | Mean-field dynamo equations are addressed with the aid of the path-integral
method. The evolution of magnetic field is treated as a three-dimensional
Wiener random process, and the mean magnetic-field equations are obtained with
the Wiener integral over all the trajectories of fluid particle. The form of
the equations is just the same as the conventional mean-field equations, but
the present equations are derived with the velocity-field realization affected
by the magnetic-field force. In this sense, the present ones are nonlinear
dynamo equations.
| astro-ph.SR | meanfield dynamo equations are addressed with the aid of the pathintegral method the evolution of magnetic field is treated as a threedimensional wiener random process and the mean magneticfield equations are obtained with the wiener integral over all the trajectories of fluid particle the form of the equations is just the same as the conventional meanfield equations but the present equations are derived with the velocityfield realization affected by the magneticfield force in this sense the present ones are nonlinear dynamo equations | [['meanfield', 'dynamo', 'equations', 'are', 'addressed', 'with', 'the', 'aid', 'of', 'the', 'pathintegral', 'method', 'the', 'evolution', 'of', 'magnetic', 'field', 'is', 'treated', 'as', 'a', 'threedimensional', 'wiener', 'random', 'process', 'and', 'the', 'mean', 'magneticfield', 'equations', 'are', 'obtained', 'with', 'the', 'wiener', 'integral', 'over', 'all', 'the', 'trajectories', 'of', 'fluid', 'particle', 'the', 'form', 'of', 'the', 'equations', 'is', 'just', 'the', 'same', 'as', 'the', 'conventional', 'meanfield', 'equations', 'but', 'the', 'present', 'equations', 'are', 'derived', 'with', 'the', 'velocityfield', 'realization', 'affected', 'by', 'the', 'magneticfield', 'force', 'in', 'this', 'sense', 'the', 'present', 'ones', 'are', 'nonlinear', 'dynamo', 'equations']] | [-0.14923082817652514, 0.1667187288630663, -0.0783773418061617, 0.05209239720159353, -0.06463188744468115, -0.06681935388663011, -0.06518158219504828, 0.2915443783943973, -0.282795359721271, -0.290885511217866, 0.07583431485421364, -0.23968733065738912, -0.15416931338244821, 0.18982283572990039, 0.0014935518705808536, 0.056452367114039455, 0.0395580634372536, 0.06187850536733139, -0.05465047344815258, -0.2289897138565188, 0.3257760289693024, 0.015243610685191504, 0.22401242834947457, -0.08214800611916338, 0.14152431452828573, -0.032081766531053116, -0.046006857712821266, 0.07228765483355014, -0.1467306625961167, 0.04406355023838398, 0.20112590105613556, 0.006678074405233308, 0.25801763366680686, -0.4674686937274911, -0.2687357355068188, 0.010717511483717983, 0.1570327539655675, 0.13976942408239332, -0.019331630288123538, -0.31178620448563155, 0.028709836360975738, -0.10093387240748398, -0.17647084895600906, -0.06053522925415054, -0.05988848614705181, 0.10311253928215947, -0.26858952457494123, 0.13251612019418488, 0.04814172574750534, 0.08889336046967201, -0.13065095364241067, -0.10973943334936005, -0.04335436063659627, 0.08525642674280012, 0.04443010175849095, 0.030869432719333505, 0.15162880125841716, -0.15608358138138656, -0.10379602146908505, 0.4036434473151841, -0.09065745398970093, -0.2639062257438171, 0.1321280120287045, -0.16928524061151576, -0.05108710055284929, 0.15423293670400887, 0.10721260172928251, 0.14647427980401895, -0.2036961638709394, 0.12277753169793158, -0.0330921361200148, 0.05391013445105494, 0.010258308929822794, -0.022136058794652542, 0.1500959404994075, 0.15834520500516747, 0.03394313089594972, 0.09616724544818081, -0.06954736462453516, -0.18981062704356524, -0.3364709589812087, -0.10747509525816251, -0.1518078424823016, 0.061618868957228234, -0.1004601838690067, -0.21928246732568368, 0.3381910036380471, 0.15912979896884502, 0.1147167842108302, 0.049849196836897515, 0.2894724600880248, 0.2546100105107876, 0.030544877097737497, 0.09639304225537472, 0.2673569047687257, 0.23435544699896127, 0.15060953250035597, -0.2565037950010198, 0.04345517619598157, 0.1331751439947544] |
1,802.02843 | Numerical simulation of electrically-driven flows using OpenFOAM | In this work, we study the implementation of electrically-driven flow (EDF)
models in the finite-volume framework of $\text{OpenFOAM}^\circledR$. The
Poisson-Nernst-Planck model is used for the transport of charged species and it
is coupled to the Navier-Stokes equations, governing the fluid flow. In
addition, the Poisson-Boltzmann and Debye-H\"uckel models are also implemented.
The discretization method and the boundary conditions are carefully handled in
order to ensure conservativeness of ionic species in generic meshes and
second-order accuracy in space and time. The applicability of the developed
solver is illustrated in two relevant EDFs: induced-charge electroosmosis
around a conducting cylinder and charge transport across an ion-selective
membrane. The solver developed in the present work, freely available as
open-source, can be a valuable and versatile tool in the investigation of
generic electrically-driven flows.
| physics.flu-dyn | in this work we study the implementation of electricallydriven flow edf models in the finitevolume framework of textopenfoamcircledr the poissonnernstplanck model is used for the transport of charged species and it is coupled to the navierstokes equations governing the fluid flow in addition the poissonboltzmann and debyehuckel models are also implemented the discretization method and the boundary conditions are carefully handled in order to ensure conservativeness of ionic species in generic meshes and secondorder accuracy in space and time the applicability of the developed solver is illustrated in two relevant edfs inducedcharge electroosmosis around a conducting cylinder and charge transport across an ionselective membrane the solver developed in the present work freely available as opensource can be a valuable and versatile tool in the investigation of generic electricallydriven flows | [['in', 'this', 'work', 'we', 'study', 'the', 'implementation', 'of', 'electricallydriven', 'flow', 'edf', 'models', 'in', 'the', 'finitevolume', 'framework', 'of', 'textopenfoamcircledr', 'the', 'poissonnernstplanck', 'model', 'is', 'used', 'for', 'the', 'transport', 'of', 'charged', 'species', 'and', 'it', 'is', 'coupled', 'to', 'the', 'navierstokes', 'equations', 'governing', 'the', 'fluid', 'flow', 'in', 'addition', 'the', 'poissonboltzmann', 'and', 'debyehuckel', 'models', 'are', 'also', 'implemented', 'the', 'discretization', 'method', 'and', 'the', 'boundary', 'conditions', 'are', 'carefully', 'handled', 'in', 'order', 'to', 'ensure', 'conservativeness', 'of', 'ionic', 'species', 'in', 'generic', 'meshes', 'and', 'secondorder', 'accuracy', 'in', 'space', 'and', 'time', 'the', 'applicability', 'of', 'the', 'developed', 'solver', 'is', 'illustrated', 'in', 'two', 'relevant', 'edfs', 'inducedcharge', 'electroosmosis', 'around', 'a', 'conducting', 'cylinder', 'and', 'charge', 'transport', 'across', 'an', 'ionselective', 'membrane', 'the', 'solver', 'developed', 'in', 'the', 'present', 'work', 'freely', 'available', 'as', 'opensource', 'can', 'be', 'a', 'valuable', 'and', 'versatile', 'tool', 'in', 'the', 'investigation', 'of', 'generic', 'electricallydriven', 'flows']] | [-0.10207842578347481, 0.07396671535855148, -0.09059761275784695, 0.02197512892053055, 0.0011725994354492286, -0.1549540777268703, -0.04780840010062093, 0.3506981107566389, -0.25958928750333143, -0.28893007575243246, 0.09485851033878134, -0.24766390710647102, -0.10830577374144923, 0.1916079439852183, -0.012420781582477503, 0.11490094131295336, 0.05616271876715473, -0.04565004815958673, -0.02162633261397673, -0.18376877559785498, 0.268080968016875, 0.045643559911695775, 0.3044113180731074, 0.11849921853354317, 0.08924401581316488, -0.048413344633445377, -0.02199999225922511, 0.088098256182775, -0.1616636771159392, 0.11131312653014902, 0.255822720045046, 0.030229909985791892, 0.23646807555269334, -0.47957686908193864, -0.24320758556132205, -0.010712566749134567, 0.15718432143330574, 0.14669979717291426, -0.0572614774118847, -0.26581794495723443, 0.0463311466628511, -0.1883882482015906, -0.1495012934828992, -0.11546433483817964, -0.043212798780587036, 0.03824657160839706, -0.26223961864889134, 0.08895645865936785, 0.02665177939707064, 0.05198607390775578, -0.1074345055676531, -0.08698197242847527, -0.03438777586507058, 0.10747357235959498, 0.04732299417719332, -0.0020113289119763067, 0.14423742908002168, -0.10845756329945289, -0.032165399972654996, 0.42122909032332245, -0.08253948513902287, -0.28736117573134834, 0.1954152350081131, -0.07913885108064278, -0.09190525075246114, 0.10708625872211996, 0.23654471348709194, 0.1877819420733431, -0.21762131046125432, 0.11005978502043945, -0.024832134627104097, 0.1484192063790033, 0.01699923124670022, -0.06392671293724561, 0.16684105167041707, 0.23246028217545245, 0.02831445536139654, 0.12723187947176484, -0.061345968997557065, -0.1473911879293155, -0.3125129155887407, -0.19404266498168, -0.14120156035096443, -0.03983696012801374, -0.07265209050740395, -0.18214826020994224, 0.3866486099541362, 0.1970818630697977, 0.07174338549521053, -0.01400755147756172, 0.30498468370205956, 0.10501544843918964, 0.054290477113681845, 0.10940116511847009, 0.2022687868320645, 0.148424937389791, 0.14818848216964398, -0.2722805323319335, 0.03841427321458468, 0.11222459380223881] |
1,802.02844 | Using a reservoir computer to learn chaotic attractors, with
applications to chaos synchronisation and cryptography | Using the machine learning approach known as reservoir computing, it is
possible to train one dynamical system to emulate another. We show that such
trained reservoir computers reproduce the properties of the attractor of the
chaotic system sufficiently well to exhibit chaos synchronisation. That is, the
trained reservoir computer, weakly driven by the chaotic system, will
synchronise with the chaotic system. Conversely, the chaotic system, weakly
driven by a trained reservoir computer, will synchronise with the reservoir
computer. We illustrate this behaviour on the Mackey-Glass and Lorenz systems.
We then show that trained reservoir computers can be used to crack chaos based
cryptography and illustrate this on a chaos cryptosystem based on the
Mackey-Glass system. We conclude by discussing why reservoir computers are so
good at emulating chaotic systems.
| cs.NE | using the machine learning approach known as reservoir computing it is possible to train one dynamical system to emulate another we show that such trained reservoir computers reproduce the properties of the attractor of the chaotic system sufficiently well to exhibit chaos synchronisation that is the trained reservoir computer weakly driven by the chaotic system will synchronise with the chaotic system conversely the chaotic system weakly driven by a trained reservoir computer will synchronise with the reservoir computer we illustrate this behaviour on the mackeyglass and lorenz systems we then show that trained reservoir computers can be used to crack chaos based cryptography and illustrate this on a chaos cryptosystem based on the mackeyglass system we conclude by discussing why reservoir computers are so good at emulating chaotic systems | [['using', 'the', 'machine', 'learning', 'approach', 'known', 'as', 'reservoir', 'computing', 'it', 'is', 'possible', 'to', 'train', 'one', 'dynamical', 'system', 'to', 'emulate', 'another', 'we', 'show', 'that', 'such', 'trained', 'reservoir', 'computers', 'reproduce', 'the', 'properties', 'of', 'the', 'attractor', 'of', 'the', 'chaotic', 'system', 'sufficiently', 'well', 'to', 'exhibit', 'chaos', 'synchronisation', 'that', 'is', 'the', 'trained', 'reservoir', 'computer', 'weakly', 'driven', 'by', 'the', 'chaotic', 'system', 'will', 'synchronise', 'with', 'the', 'chaotic', 'system', 'conversely', 'the', 'chaotic', 'system', 'weakly', 'driven', 'by', 'a', 'trained', 'reservoir', 'computer', 'will', 'synchronise', 'with', 'the', 'reservoir', 'computer', 'we', 'illustrate', 'this', 'behaviour', 'on', 'the', 'mackeyglass', 'and', 'lorenz', 'systems', 'we', 'then', 'show', 'that', 'trained', 'reservoir', 'computers', 'can', 'be', 'used', 'to', 'crack', 'chaos', 'based', 'cryptography', 'and', 'illustrate', 'this', 'on', 'a', 'chaos', 'cryptosystem', 'based', 'on', 'the', 'mackeyglass', 'system', 'we', 'conclude', 'by', 'discussing', 'why', 'reservoir', 'computers', 'are', 'so', 'good', 'at', 'emulating', 'chaotic', 'systems']] | [-0.1706929643198039, 0.10956798228182534, -0.12695213508712808, 0.06560962763795442, -0.015435304052319175, -0.24977344152239664, 0.0019132841068009536, 0.3349942727981843, -0.33635163351229225, -0.26675333982954424, 0.13874944979541523, -0.25557386473745336, -0.25676616193536467, 0.296353710798164, -0.08227900613113776, 0.10316478659925882, 0.12558406710538061, 0.04190923356227288, 0.02882899257829124, -0.29987403790849126, 0.31772157047377075, 0.04528509080410004, 0.23223060750503585, -0.06347633959985403, 0.11817002925992937, -0.09722965219700637, 0.06057378325192619, -0.029470067550680896, -0.05312876384826007, 0.0898792041319444, 0.21278016308643818, 0.11593290464952588, 0.2901163997287436, -0.45109147691102913, -0.2264670713176561, 0.10773601390280609, 0.16102298166126358, 0.14797737208274445, -0.03437548441823225, -0.3242573832854802, 0.04054273383569174, -0.19726195193144905, -0.11723366988707305, -0.13756869989402173, 0.014066067730011634, 0.06745570845714258, -0.20849542849689953, 0.026350265801992526, 0.07447734435766669, 0.09683250074180984, 0.027656071173214867, 0.012596013914259482, -0.027547404998480234, 0.12782576815550065, -0.05741217567462676, -0.0047635424145778945, 0.2275650599040091, -0.1114898211351603, -0.11019832618144709, 0.3628936294726161, -0.09985266630122684, -0.17930026694612447, 0.28063005505512334, -0.09325280066131968, -0.11411168742130777, 0.06256094352205017, 0.1987044115067106, 0.026777862838303395, -0.16996109680193225, 0.031259318917462704, -0.023535509694858577, 0.2423122450059583, -0.01412535397075983, -0.010763279433080624, 0.23577002142447717, 0.24397726303558478, 0.010463393921422403, 0.17888840684909085, -0.01881995715395829, -0.19253467392337026, -0.21305108477556428, -0.09010354630187038, -0.25925891169224136, 0.044029478240007344, -0.021540122279715038, -0.1551730136112707, 0.353342177375227, 0.2584009237277011, 0.17487752437230575, 0.07239905380203511, 0.28584359008674476, 0.11138443099497276, 0.06827504555297684, 0.13196196727627932, 0.24524709712280784, 0.08816895638087173, 0.16141261450238814, -0.25553826817722863, 0.048673270277447944, 0.05190778233818421] |
1,802.02845 | Properties of Superconducting Nb and NbTi Coatings-films Deposited by
New Ionic-Plasma Clusters method | Originally developed technique based on generation of plasma-cluster flux
emitted from cathode spots at surface of an integrally cold cathode has been
applied for deposition of niobium superconductive (thick) film materials.
Possibility for depositing thick film coatings in homogeneous, heterogeneous
and layered structures is shown to be feasible. Experimental results of
mechanical tests including Tensile Testing resulting in stretching of coatings
are presented. Critical temperature, current density and magnetic field of
deposited superconducting films with various types of structural compositions
have been investigated. Niobium-titanium layered coating films deposited by
Ionic-plasma clusters method are characterized by very high parameters of
critical current density. All results reveal coating material high value in
terms of manufacturability. Low cost, high reliability and ease of
implementation of new technology for a wide-scale production of superconducting
film materials have been demonstrated.
| cond-mat.mtrl-sci | originally developed technique based on generation of plasmacluster flux emitted from cathode spots at surface of an integrally cold cathode has been applied for deposition of niobium superconductive thick film materials possibility for depositing thick film coatings in homogeneous heterogeneous and layered structures is shown to be feasible experimental results of mechanical tests including tensile testing resulting in stretching of coatings are presented critical temperature current density and magnetic field of deposited superconducting films with various types of structural compositions have been investigated niobiumtitanium layered coating films deposited by ionicplasma clusters method are characterized by very high parameters of critical current density all results reveal coating material high value in terms of manufacturability low cost high reliability and ease of implementation of new technology for a widescale production of superconducting film materials have been demonstrated | [['originally', 'developed', 'technique', 'based', 'on', 'generation', 'of', 'plasmacluster', 'flux', 'emitted', 'from', 'cathode', 'spots', 'at', 'surface', 'of', 'an', 'integrally', 'cold', 'cathode', 'has', 'been', 'applied', 'for', 'deposition', 'of', 'niobium', 'superconductive', 'thick', 'film', 'materials', 'possibility', 'for', 'depositing', 'thick', 'film', 'coatings', 'in', 'homogeneous', 'heterogeneous', 'and', 'layered', 'structures', 'is', 'shown', 'to', 'be', 'feasible', 'experimental', 'results', 'of', 'mechanical', 'tests', 'including', 'tensile', 'testing', 'resulting', 'in', 'stretching', 'of', 'coatings', 'are', 'presented', 'critical', 'temperature', 'current', 'density', 'and', 'magnetic', 'field', 'of', 'deposited', 'superconducting', 'films', 'with', 'various', 'types', 'of', 'structural', 'compositions', 'have', 'been', 'investigated', 'niobiumtitanium', 'layered', 'coating', 'films', 'deposited', 'by', 'ionicplasma', 'clusters', 'method', 'are', 'characterized', 'by', 'very', 'high', 'parameters', 'of', 'critical', 'current', 'density', 'all', 'results', 'reveal', 'coating', 'material', 'high', 'value', 'in', 'terms', 'of', 'manufacturability', 'low', 'cost', 'high', 'reliability', 'and', 'ease', 'of', 'implementation', 'of', 'new', 'technology', 'for', 'a', 'widescale', 'production', 'of', 'superconducting', 'film', 'materials', 'have', 'been', 'demonstrated']] | [-0.10149817213615668, 0.18254182165888178, -0.020240721280539508, -0.08566160469348333, -0.01893245980241581, -0.16257489941440018, 0.033788730068258326, 0.4577527640009285, -0.20607769430117837, -0.35820916098108363, 0.061369132776604614, -0.2632057494798997, -0.047321682988448924, 0.2739841661843142, -0.027720887543059382, 0.13347520350121467, -0.020953442579261343, -0.14093994924665562, -0.07402800345185906, -0.23868686131995365, 0.2778341708314444, 0.09377279557301697, 0.4262761409233387, 0.11622795880303011, 0.05643908012154183, -0.09491418848248352, 0.0803529880472627, 0.055411978048811615, -0.15737147287542658, 0.06819006346062848, 0.272833726179779, -0.04415651392086612, 0.19176101207004903, -0.5237392944640907, -0.2972194017996465, -0.021792772226035595, 0.09405662806851692, 0.048497238343483524, -0.1478139594518072, -0.2201125993484393, 0.12343822452204681, -0.15974532966361962, -0.11487741048510809, -0.07203112891525086, -0.0068687633042314785, 0.07271560650192817, -0.21771809470286607, 0.026616659495083236, 0.004371805573442489, 0.12015650385230976, -0.10114763821545232, -0.1941781040820244, -0.07737278609967238, 0.02935441241676646, 0.03271479907977794, 0.00215293118674168, 0.2606271586089423, -0.14545886733926328, -0.0643420481119529, 0.31856594418168516, -0.02296283343129378, -0.07028629491455797, 0.19272918600932157, -0.1387700646681557, -0.043763576443062016, 0.21231905341890633, 0.1597917396435164, 0.11232970478853449, -0.18359223179015002, 0.04507775697572668, 0.052343049154903995, 0.18125635255268194, 0.1422735933508528, 0.052142383222629256, 0.2528529300221375, 0.3029737247353686, -0.010213312780470551, 0.1802784320023051, -0.1097966006176224, 0.03225482068080595, -0.17696299567762622, -0.23304905026058728, -0.21061406247895492, 0.01956002411775683, -0.08714296310561047, -0.2384654487125642, 0.3424409917184621, 0.12362075186530619, 0.0991907834383498, -0.09418544649405587, 0.242657418691035, 0.04300327381623307, 0.10360657878017011, 0.0030460981231995093, 0.27834938163343903, 0.19827854978550868, 0.12199717347030493, -0.1784424524757787, 0.1332492630620648, -0.020366760124837544] |
1,802.02846 | Soliton solutions in geometrically nonlinear Cosserat micropolar
elasticity with large deformations | We study the fully nonlinear dynamical Cosserat micropolar elasticity problem
in space with three dimensionals with various energy functionals dependent on
the microrotation $\overline{R}$ and the deformation gradient tensor $F$ . We
derive a set of coupled nonlinear equations of motion from first principles by
varying the complete energy functional. We obtain a double sine-Gordon equation
and construct soliton solutions. We show how the solutions can determine the
overall deformational behaviour and discuss the relations between wave numbers
and wave velocities thereby identifying parameter values where the waves cannot
propagate.
| math-ph math.MP | we study the fully nonlinear dynamical cosserat micropolar elasticity problem in space with three dimensionals with various energy functionals dependent on the microrotation overliner and the deformation gradient tensor f we derive a set of coupled nonlinear equations of motion from first principles by varying the complete energy functional we obtain a double sinegordon equation and construct soliton solutions we show how the solutions can determine the overall deformational behaviour and discuss the relations between wave numbers and wave velocities thereby identifying parameter values where the waves cannot propagate | [['we', 'study', 'the', 'fully', 'nonlinear', 'dynamical', 'cosserat', 'micropolar', 'elasticity', 'problem', 'in', 'space', 'with', 'three', 'dimensionals', 'with', 'various', 'energy', 'functionals', 'dependent', 'on', 'the', 'microrotation', 'overliner', 'and', 'the', 'deformation', 'gradient', 'tensor', 'f', 'we', 'derive', 'a', 'set', 'of', 'coupled', 'nonlinear', 'equations', 'of', 'motion', 'from', 'first', 'principles', 'by', 'varying', 'the', 'complete', 'energy', 'functional', 'we', 'obtain', 'a', 'double', 'sinegordon', 'equation', 'and', 'construct', 'soliton', 'solutions', 'we', 'show', 'how', 'the', 'solutions', 'can', 'determine', 'the', 'overall', 'deformational', 'behaviour', 'and', 'discuss', 'the', 'relations', 'between', 'wave', 'numbers', 'and', 'wave', 'velocities', 'thereby', 'identifying', 'parameter', 'values', 'where', 'the', 'waves', 'can', 'not', 'propagate']] | [-0.16007526612348771, 0.1287521989597531, -0.07498687427501415, 0.045933797313266675, -0.12287501202310237, -0.07568054306817901, -0.034886446603563395, 0.31421793332804787, -0.31593822744109906, -0.2675370193515601, 0.08137848747637792, -0.2652861402903715, -0.19340652885606116, 0.160898240683391, 0.03142257650079352, 0.07606749310242561, 0.025334987187695304, 0.017042909236101623, -0.09246828483438559, -0.15077259100638749, 0.3469488308294101, -0.04995993436889702, 0.2758168541313557, 0.009787745873203104, 0.14174007459051824, 0.011031784038739592, 0.01126718818304244, 0.04202399313354373, -0.23101425735708955, 0.09563029009398868, 0.22945840299663164, 0.0524341672543813, 0.2490453662042077, -0.47064304523421135, -0.24611186594022125, 0.06624126783441334, 0.11077832958263377, 0.13978615535287123, 0.005998846838051935, -0.2715794201521726, 0.026663155232168986, -0.13652070835651306, -0.1764729252095554, -0.1058058710036318, 0.0034402738000904576, 0.11679901169832754, -0.2406075178917623, 0.12191964275716397, 0.0012325223759627702, -0.01607135781662518, -0.1722935179269381, -0.05690048871499099, -0.07350010128058702, 0.06256012912523107, 0.04896666440495363, -0.01668314020191267, 0.08043594668839085, -0.13827332038055645, -0.059188563863255, 0.38684317826429443, -0.11778170401308936, -0.3016635004765867, 0.13538418199050795, -0.12012666530300224, -0.08246097858639413, 0.10544676641839441, 0.18708950965508317, 0.12491849516884665, -0.14359674217660776, 0.10495871003832291, 0.0038129692753970496, 0.16698562826835708, 0.08627768335968591, -0.006769399409799763, 0.1622809831110572, 0.11147229868939586, 0.04612350980803538, 0.14087932608665876, -0.05756783860574052, -0.09697307583488775, -0.3569504220582796, -0.13342242723519213, -0.09804294037559394, 0.052836717125858974, -0.12369997652830933, -0.1777513184364927, 0.40419177402836387, 0.10137605029838474, 0.15886581761388402, 0.08616321078721392, 0.20421768087119366, 0.1920983322853225, 0.0013865366619959306, 0.09816688701531358, 0.27214245686537764, 0.18589455386613277, 0.08132890286447292, -0.25368312024511397, -0.02101894346683213, 0.1292441464186217] |
1,802.02847 | Weak doping dependence of the antiferromagnetic coupling between
nearest-neighbor Mn$^{2+}$ spins in
(Ba$_{1-x}$K$_x$)(Zn$_{1-y}$Mn$_y$)$_2$As$_2$ | Dilute magnetic semiconductors (DMS) are nonmagnetic semiconductors doped
with magnetic transition metals. The recently discovered DMS material
(Ba$_{1-x}$K$_{x}$)(Zn$_{1-y}$Mn$_{y}$)$_{2}$As$_{2}$ offers a unique and
versatile control of the Curie temperature, $T_{\mathrm{C}}$, by decoupling the
spin (Mn$^{2+}$, $S=5/2$) and charge (K$^{+}$) doping in different
crystallographic layers. In an attempt to describe from first-principles
calculations the role of hole doping in stabilizing ferromagnetic order, it was
recently suggested that the antiferromagnetic exchange coupling $J$ between the
nearest-neighbor Mn ions would experience a nearly twofold suppression upon
doping 20\% of holes by potassium substitution. At the same time,
further-neighbor interactions become increasingly ferromagnetic upon doping,
leading to a rapid increase of $T_{\mathrm{C}}$. Using inelastic neutron
scattering, we have observed a localized magnetic excitation at about 13 meV,
associated with the destruction of the nearest-neighbor Mn-Mn singlet ground
state. Hole doping results in a notable broadening of this peak, evidencing
significant particle-hole damping, but with only a minor change in the peak
position. We argue that this unexpected result can be explained by a combined
effect of superexchange and double-exchange interactions.
| cond-mat.mtrl-sci cond-mat.str-el cond-mat.supr-con | dilute magnetic semiconductors dms are nonmagnetic semiconductors doped with magnetic transition metals the recently discovered dms material ba_1xk_xzn_1ymn_y_2as_2 offers a unique and versatile control of the curie temperature t_mathrmc by decoupling the spin mn2 s52 and charge k doping in different crystallographic layers in an attempt to describe from firstprinciples calculations the role of hole doping in stabilizing ferromagnetic order it was recently suggested that the antiferromagnetic exchange coupling j between the nearestneighbor mn ions would experience a nearly twofold suppression upon doping 20 of holes by potassium substitution at the same time furtherneighbor interactions become increasingly ferromagnetic upon doping leading to a rapid increase of t_mathrmc using inelastic neutron scattering we have observed a localized magnetic excitation at about 13 mev associated with the destruction of the nearestneighbor mnmn singlet ground state hole doping results in a notable broadening of this peak evidencing significant particlehole damping but with only a minor change in the peak position we argue that this unexpected result can be explained by a combined effect of superexchange and doubleexchange interactions | [['dilute', 'magnetic', 'semiconductors', 'dms', 'are', 'nonmagnetic', 'semiconductors', 'doped', 'with', 'magnetic', 'transition', 'metals', 'the', 'recently', 'discovered', 'dms', 'material', 'ba_1xk_xzn_1ymn_y_2as_2', 'offers', 'a', 'unique', 'and', 'versatile', 'control', 'of', 'the', 'curie', 'temperature', 't_mathrmc', 'by', 'decoupling', 'the', 'spin', 'mn2', 's52', 'and', 'charge', 'k', 'doping', 'in', 'different', 'crystallographic', 'layers', 'in', 'an', 'attempt', 'to', 'describe', 'from', 'firstprinciples', 'calculations', 'the', 'role', 'of', 'hole', 'doping', 'in', 'stabilizing', 'ferromagnetic', 'order', 'it', 'was', 'recently', 'suggested', 'that', 'the', 'antiferromagnetic', 'exchange', 'coupling', 'j', 'between', 'the', 'nearestneighbor', 'mn', 'ions', 'would', 'experience', 'a', 'nearly', 'twofold', 'suppression', 'upon', 'doping', '20', 'of', 'holes', 'by', 'potassium', 'substitution', 'at', 'the', 'same', 'time', 'furtherneighbor', 'interactions', 'become', 'increasingly', 'ferromagnetic', 'upon', 'doping', 'leading', 'to', 'a', 'rapid', 'increase', 'of', 't_mathrmc', 'using', 'inelastic', 'neutron', 'scattering', 'we', 'have', 'observed', 'a', 'localized', 'magnetic', 'excitation', 'at', 'about', '13', 'mev', 'associated', 'with', 'the', 'destruction', 'of', 'the', 'nearestneighbor', 'mnmn', 'singlet', 'ground', 'state', 'hole', 'doping', 'results', 'in', 'a', 'notable', 'broadening', 'of', 'this', 'peak', 'evidencing', 'significant', 'particlehole', 'damping', 'but', 'with', 'only', 'a', 'minor', 'change', 'in', 'the', 'peak', 'position', 'we', 'argue', 'that', 'this', 'unexpected', 'result', 'can', 'be', 'explained', 'by', 'a', 'combined', 'effect', 'of', 'superexchange', 'and', 'doubleexchange', 'interactions']] | [-0.17913785183403108, 0.24306039866068335, 0.025163738357036242, 0.05438584067326571, -0.0196493219286536, -0.18068723241931625, 0.12922244478815367, 0.41347999790417295, -0.23914219857060484, -0.3107252862058314, -0.0663549124895196, -0.37484122321275726, -0.06377703687974384, 0.11814645327760705, 0.08757973339408637, -0.06457525532160487, -0.044452975194102955, -0.04146704415258552, -0.12909394995974643, -0.22635545974131674, 0.2572873981270407, 0.07787580243444868, 0.2762793112860527, 0.11705809808735336, 0.011088757759093173, 0.03167106705368496, 0.166879519152322, 0.00466208995452949, -0.1273812775757064, 0.027934042480108993, 0.2820417396564569, -0.1482043078634888, 0.20709242689024124, -0.4222834550482886, -0.21276981400325895, -0.029165939642116428, 0.15454563250765205, 0.1869725755069937, -0.14290696302495365, -0.28121378987229295, 0.02452511752290385, -0.18939846097358634, -0.1239093060102979, -0.10373180564759032, -0.011078261874083962, -0.018410737072782856, -0.2607377071997949, 0.11602083316139344, 0.13616186110701944, 0.1011594520698418, -0.13279334466106124, -0.152133463469467, -0.11285669183524857, 0.008612113073468208, 0.09526515915457691, 0.10722421150920647, 0.1664525274423483, -0.04680477620501603, -0.11990545707555221, 0.3099107728525996, -0.05403170118707099, -0.011836434195616415, 0.1664561727137438, -0.21063812022496547, -0.09175725004835321, 0.2236442866269499, 0.08953219760342368, 0.07438793547950419, -0.15676968963916546, 0.08577661184228158, 0.04285237624492896, 0.21698669023811817, 0.05759468400884154, 0.0741789643233642, 0.27977001458938633, 0.1941020979013826, 0.03458957314624318, 0.09401387012929523, -0.12161386165069415, -0.051568390747000065, -0.14671097607750977, -0.1553683788568846, -0.2183732028052743, 0.09652580039974834, -0.09955546741082799, -0.15438603967428208, 0.3595962404353278, 0.16097063182720117, 0.17470718258725745, -0.10965835081147296, 0.19959294123153085, 0.08794693096906744, 0.0985793110994356, 0.019485654346644878, 0.28423283819242245, 0.19127778733814402, 0.14565329821780323, -0.3190207631473563, 0.12318781092230763, -0.006291055354023618] |
1,802.02848 | Self-gravitating axially symmetric disks in general-relativistic
rotation | We integrate numerically axially symmetric stationary Einstein equations
describing self-gravitating disks around spinless black holes. The numerical
scheme is based on a method developed by Shibata, but contains important new
ingredients. We derive a new general-relativistic Keplerian rotation law for
self-gravitating disks around spinning black holes. Former results concerning
rotation around spin-less black holes emerge in the limit of a vanishing spin
parameter. These rotation curves might be used for the description of rotating
stars, after appropriate modification around the symmetry axis. They can be
applied to the description of compact torus--black hole configurations,
including active galactic nuclei or products of coalescences of two neutron
stars.
| gr-qc astro-ph.HE | we integrate numerically axially symmetric stationary einstein equations describing selfgravitating disks around spinless black holes the numerical scheme is based on a method developed by shibata but contains important new ingredients we derive a new generalrelativistic keplerian rotation law for selfgravitating disks around spinning black holes former results concerning rotation around spinless black holes emerge in the limit of a vanishing spin parameter these rotation curves might be used for the description of rotating stars after appropriate modification around the symmetry axis they can be applied to the description of compact torusblack hole configurations including active galactic nuclei or products of coalescences of two neutron stars | [['we', 'integrate', 'numerically', 'axially', 'symmetric', 'stationary', 'einstein', 'equations', 'describing', 'selfgravitating', 'disks', 'around', 'spinless', 'black', 'holes', 'the', 'numerical', 'scheme', 'is', 'based', 'on', 'a', 'method', 'developed', 'by', 'shibata', 'but', 'contains', 'important', 'new', 'ingredients', 'we', 'derive', 'a', 'new', 'generalrelativistic', 'keplerian', 'rotation', 'law', 'for', 'selfgravitating', 'disks', 'around', 'spinning', 'black', 'holes', 'former', 'results', 'concerning', 'rotation', 'around', 'spinless', 'black', 'holes', 'emerge', 'in', 'the', 'limit', 'of', 'a', 'vanishing', 'spin', 'parameter', 'these', 'rotation', 'curves', 'might', 'be', 'used', 'for', 'the', 'description', 'of', 'rotating', 'stars', 'after', 'appropriate', 'modification', 'around', 'the', 'symmetry', 'axis', 'they', 'can', 'be', 'applied', 'to', 'the', 'description', 'of', 'compact', 'torusblack', 'hole', 'configurations', 'including', 'active', 'galactic', 'nuclei', 'or', 'products', 'of', 'coalescences', 'of', 'two', 'neutron', 'stars']] | [-0.1633277390218739, 0.141601741532906, -0.08335863464245839, 0.13987365263580745, -0.09444062388723805, -0.12738795058491328, -0.004138122361508153, 0.3036206569522619, -0.11250128198548087, -0.2782404893565746, 0.06222927950300454, -0.2858880577353938, -0.0336603054089383, 0.24067202831308046, -0.03420826703576105, 0.042008051222988535, 0.01431022461814185, -0.02776850053508367, -0.1182483020160968, -0.2096072768725987, 0.3665489071181842, 0.039691865834451855, 0.1541975495272449, -0.10128370712378196, 0.07500263971631371, -0.020981547675494636, 0.0005836728173086331, 0.02497394195802155, -0.1827527714715827, 0.04003662053894784, 0.2141156633650618, 0.07426145330869725, 0.15549479969555424, -0.4315977484165203, -0.2073846969132622, 0.045075079066944974, 0.208257718721316, 0.19244803502002641, -0.14611059105400706, -0.26974569459756215, 0.07913143199291967, -0.2535373584456032, -0.28326267563250096, -0.10134701465389558, 0.0833427885270101, 0.01525936887289087, -0.19929050080411667, 0.1250671345762731, 0.13279780489170834, -0.02233349892138947, -0.17030842638840632, -0.05136626644858292, -0.052134146031347056, 0.054661676746660046, 0.10002745830320886, 0.014530157476353148, 0.22211635314216394, -0.058584820733882395, -0.093617039156102, 0.40210657105559394, -0.06377267196242298, -0.1995011825912765, 0.14960475620547575, -0.22700490400283818, -0.1386896951567559, 0.1518553630848016, 0.21510342564433813, 0.25601200071264646, -0.15034471994177218, 0.054651272106206135, -0.042512645350680466, 0.16202902552959997, 0.1268660989634338, -0.0027752353277589593, 0.45912857533742985, 0.12665374250639053, -0.026793485185841008, 0.12976921788483325, -0.12888715679402507, -0.1687009569479241, -0.2581467649472567, -0.11015361545252658, -0.1181817556420962, 0.14056234187224792, -0.14918395157992131, -0.16427538007763878, 0.2993863075340674, 0.03468448555629168, 0.1261575517998565, -0.02448686689493202, 0.25373752358964774, 0.05357307725408603, 0.04216947324928783, 0.16362752174803366, 0.32758060033832276, 0.21199786833576148, 0.08445765441727071, -0.2311001271319886, -0.055177720915526154, 0.12140186660523926] |
1,802.02849 | Multi-state and multi-hypothesis discrimination with open quantum
systems | We show how an upper bound for the ability to discriminate any number N of
candidates for the Hamiltonian governing the evolution of an open quantum
system may be calculated by numerically efficient means. Our method applies an
effective master equation analysis to evaluate the pairwise overlaps between
candidate full states of the system and its environment pertaining to the
Hamiltonians. These overlaps are then used to construct an N -dimensional
representation of the states. The optimal positive-operator valued measure
(POVM) and the corresponding probability of assigning a false hypothesis may
subsequently be evaluated by phrasing optimal discrimination of multiple
non-orthogonal quantum states as a semi-definite programming problem. We
investigate the structure of the optimal POVM and we provide three realistic
examples of hypothesis testing with open quantum systems.
| quant-ph | we show how an upper bound for the ability to discriminate any number n of candidates for the hamiltonian governing the evolution of an open quantum system may be calculated by numerically efficient means our method applies an effective master equation analysis to evaluate the pairwise overlaps between candidate full states of the system and its environment pertaining to the hamiltonians these overlaps are then used to construct an n dimensional representation of the states the optimal positiveoperator valued measure povm and the corresponding probability of assigning a false hypothesis may subsequently be evaluated by phrasing optimal discrimination of multiple nonorthogonal quantum states as a semidefinite programming problem we investigate the structure of the optimal povm and we provide three realistic examples of hypothesis testing with open quantum systems | [['we', 'show', 'how', 'an', 'upper', 'bound', 'for', 'the', 'ability', 'to', 'discriminate', 'any', 'number', 'n', 'of', 'candidates', 'for', 'the', 'hamiltonian', 'governing', 'the', 'evolution', 'of', 'an', 'open', 'quantum', 'system', 'may', 'be', 'calculated', 'by', 'numerically', 'efficient', 'means', 'our', 'method', 'applies', 'an', 'effective', 'master', 'equation', 'analysis', 'to', 'evaluate', 'the', 'pairwise', 'overlaps', 'between', 'candidate', 'full', 'states', 'of', 'the', 'system', 'and', 'its', 'environment', 'pertaining', 'to', 'the', 'hamiltonians', 'these', 'overlaps', 'are', 'then', 'used', 'to', 'construct', 'an', 'n', 'dimensional', 'representation', 'of', 'the', 'states', 'the', 'optimal', 'positiveoperator', 'valued', 'measure', 'povm', 'and', 'the', 'corresponding', 'probability', 'of', 'assigning', 'a', 'false', 'hypothesis', 'may', 'subsequently', 'be', 'evaluated', 'by', 'phrasing', 'optimal', 'discrimination', 'of', 'multiple', 'nonorthogonal', 'quantum', 'states', 'as', 'a', 'semidefinite', 'programming', 'problem', 'we', 'investigate', 'the', 'structure', 'of', 'the', 'optimal', 'povm', 'and', 'we', 'provide', 'three', 'realistic', 'examples', 'of', 'hypothesis', 'testing', 'with', 'open', 'quantum', 'systems']] | [-0.12957736700994338, 0.0940829905236407, -0.0914144712796276, 0.10548190650432696, -0.013071611677043776, -0.169968695065743, 0.07838537429401636, 0.330485690291249, -0.2712549200180427, -0.3233134725253827, 0.07385908450584772, -0.2576742176861726, -0.15114428428211069, 0.19362786037544177, -0.01845920100346092, 0.12835049624112616, 0.06675703617899369, 0.06001771061140647, -0.0762461209525318, -0.2642620719333952, 0.33506883175451624, 0.04608903089700656, 0.25740017674957194, 0.024832786465164763, 0.10431561989406514, 0.00850444803981818, 0.002137526797578316, -0.012486800096582535, -0.11323519303578912, 0.13509163320698062, 0.2703583523551681, 0.19590127236000443, 0.2627512700115728, -0.39689527242624945, -0.15882273315805798, 0.11330019092086212, 0.11932655942965617, 0.1283933786303527, -0.01972263613571377, -0.33008888332072156, 0.07159038244696088, -0.16097891189937674, -0.1459931098935447, -0.11876324196021225, 0.010377129482090935, -0.03299191401361726, -0.3109044916408909, 0.028304082423389002, 0.01562707162960324, -0.006578272506603682, -0.1025048365117982, -0.10364855891959958, 0.016923410960566973, 0.17395538598833274, -0.05723365012180898, -0.01020920155894791, 0.09153708732188788, -0.08175483030062206, -0.19657082901004153, 0.33299103887325743, -0.04121242267036334, -0.2778505885742547, 0.1798195919281868, -0.07534475101143584, -0.09221794691601003, 0.0899249775508462, 0.16938752789671221, 0.13147252326643513, -0.18170738033273495, 0.08345448117668906, -0.053754857716479074, 0.17547437456588066, 0.03657604356534606, 0.053436315333283, 0.21522369010503903, 0.10149724615463453, 0.08511839645947221, 0.17764414410836013, -0.04787097406364227, -0.11651858510882702, -0.2993861057280289, -0.20620321968160643, -0.22383166640607077, 0.08089007699434364, -0.08391189610808023, -0.16137967970900874, 0.39139965404720267, 0.1562818674954528, 0.17865818342583817, 0.05533549849976345, 0.24448261117605968, 0.1576802496177455, -0.014341933052633102, 0.07318688931246829, 0.1832610698662294, 0.1562823928899832, -0.02869694669868133, -0.2646735650017973, 0.04685307844801871, 0.04417484718764764] |
1,802.0285 | Detection Games Under Fully Active Adversaries | We study a binary hypothesis testing problem in which a defender must decide
whether or not a test sequence has been drawn from a given memoryless source
$P_0$ whereas, an attacker strives to impede the correct detection. With
respect to previous works, the adversarial setup addressed in this paper
considers an attacker who is active under both hypotheses, namely, a fully
active attacker, as opposed to a partially active attacker who is active under
one hypothesis only. In the fully active setup, the attacker distorts sequences
drawn both from $P_0$ and from an alternative memoryless source $P_1$, up to a
certain distortion level, which is possibly different under the two hypotheses,
in order to maximize the confusion in distinguishing between the two sources,
i.e., to induce both false positive and false negative errors at the detector,
also referred to as the defender. We model the defender-attacker interaction as
a game and study two versions of this game, the Neyman-Pearson game and the
Bayesian game. Our main result is in the characterization of an attack strategy
that is asymptotically both dominant (i.e., optimal no matter what the
defender's strategy is) and universal, i.e., independent of $P_0$ and $P_1$.
From the analysis of the equilibrium payoff, we also derive the best achievable
performance of the defender, by relaxing the requirement on the exponential
decay rate of the false positive error probability in the Neyman--Pearson setup
and the tradeoff between the error exponents in the Bayesian setup. Such
analysis permits to characterize the conditions for the distinguishability of
the two sources given the distortion levels.
| cs.GT cs.IT math.IT | we study a binary hypothesis testing problem in which a defender must decide whether or not a test sequence has been drawn from a given memoryless source p_0 whereas an attacker strives to impede the correct detection with respect to previous works the adversarial setup addressed in this paper considers an attacker who is active under both hypotheses namely a fully active attacker as opposed to a partially active attacker who is active under one hypothesis only in the fully active setup the attacker distorts sequences drawn both from p_0 and from an alternative memoryless source p_1 up to a certain distortion level which is possibly different under the two hypotheses in order to maximize the confusion in distinguishing between the two sources ie to induce both false positive and false negative errors at the detector also referred to as the defender we model the defenderattacker interaction as a game and study two versions of this game the neymanpearson game and the bayesian game our main result is in the characterization of an attack strategy that is asymptotically both dominant ie optimal no matter what the defenders strategy is and universal ie independent of p_0 and p_1 from the analysis of the equilibrium payoff we also derive the best achievable performance of the defender by relaxing the requirement on the exponential decay rate of the false positive error probability in the neymanpearson setup and the tradeoff between the error exponents in the bayesian setup such analysis permits to characterize the conditions for the distinguishability of the two sources given the distortion levels | [['we', 'study', 'a', 'binary', 'hypothesis', 'testing', 'problem', 'in', 'which', 'a', 'defender', 'must', 'decide', 'whether', 'or', 'not', 'a', 'test', 'sequence', 'has', 'been', 'drawn', 'from', 'a', 'given', 'memoryless', 'source', 'p_0', 'whereas', 'an', 'attacker', 'strives', 'to', 'impede', 'the', 'correct', 'detection', 'with', 'respect', 'to', 'previous', 'works', 'the', 'adversarial', 'setup', 'addressed', 'in', 'this', 'paper', 'considers', 'an', 'attacker', 'who', 'is', 'active', 'under', 'both', 'hypotheses', 'namely', 'a', 'fully', 'active', 'attacker', 'as', 'opposed', 'to', 'a', 'partially', 'active', 'attacker', 'who', 'is', 'active', 'under', 'one', 'hypothesis', 'only', 'in', 'the', 'fully', 'active', 'setup', 'the', 'attacker', 'distorts', 'sequences', 'drawn', 'both', 'from', 'p_0', 'and', 'from', 'an', 'alternative', 'memoryless', 'source', 'p_1', 'up', 'to', 'a', 'certain', 'distortion', 'level', 'which', 'is', 'possibly', 'different', 'under', 'the', 'two', 'hypotheses', 'in', 'order', 'to', 'maximize', 'the', 'confusion', 'in', 'distinguishing', 'between', 'the', 'two', 'sources', 'ie', 'to', 'induce', 'both', 'false', 'positive', 'and', 'false', 'negative', 'errors', 'at', 'the', 'detector', 'also', 'referred', 'to', 'as', 'the', 'defender', 'we', 'model', 'the', 'defenderattacker', 'interaction', 'as', 'a', 'game', 'and', 'study', 'two', 'versions', 'of', 'this', 'game', 'the', 'neymanpearson', 'game', 'and', 'the', 'bayesian', 'game', 'our', 'main', 'result', 'is', 'in', 'the', 'characterization', 'of', 'an', 'attack', 'strategy', 'that', 'is', 'asymptotically', 'both', 'dominant', 'ie', 'optimal', 'no', 'matter', 'what', 'the', 'defenders', 'strategy', 'is', 'and', 'universal', 'ie', 'independent', 'of', 'p_0', 'and', 'p_1', 'from', 'the', 'analysis', 'of', 'the', 'equilibrium', 'payoff', 'we', 'also', 'derive', 'the', 'best', 'achievable', 'performance', 'of', 'the', 'defender', 'by', 'relaxing', 'the', 'requirement', 'on', 'the', 'exponential', 'decay', 'rate', 'of', 'the', 'false', 'positive', 'error', 'probability', 'in', 'the', 'neymanpearson', 'setup', 'and', 'the', 'tradeoff', 'between', 'the', 'error', 'exponents', 'in', 'the', 'bayesian', 'setup', 'such', 'analysis', 'permits', 'to', 'characterize', 'the', 'conditions', 'for', 'the', 'distinguishability', 'of', 'the', 'two', 'sources', 'given', 'the', 'distortion', 'levels']] | [-0.11531606898643076, 0.06312695809552012, -0.10049549182201557, 0.102537430154572, -0.041540218840658893, -0.2116661778747154, 0.13191322081825405, 0.34861511675123735, -0.2711214270942155, -0.3115901596062614, 0.10361367386840425, -0.27594855012201513, -0.12562360029084652, 0.1308499968376096, -0.12865022890036926, 0.05246660291556738, -0.006540410947552278, 0.07729275536257774, 0.012045842939312393, -0.2612997846409522, 0.330335546570176, 0.0874148279593774, 0.2735465079553084, -0.005874812099789376, 0.09928210565415105, 0.008999519746835905, -0.002842774629354733, -0.0016535535287680743, -0.12199714436542482, 0.05070456171466948, 0.26835116411346893, 0.17937453297690115, 0.33522506862992546, -0.36649718127775055, -0.17451806990287572, 0.17341445139449319, 0.09579362490819589, 0.10237466869075988, -0.04242074035351584, -0.29090145464412487, 0.09875953692688699, -0.16900139571947778, -0.05723651330242687, 0.023001373011462448, -0.024541892123215107, -0.007623489532008312, -0.3444045686379843, 0.0017852097239171134, 0.09840416260603957, 0.02789650770892453, -0.07193267553376446, -0.09231389347705564, 0.022135598627443406, 0.18407785536042406, 0.08806808719470144, 0.01653982107187639, 0.10767053443412403, -0.12906340903954452, -0.13700242642000432, 0.33826557391159634, -0.036108622651365906, -0.21047896140820227, 0.16877728536412234, -0.09484204261977837, -0.1054601110749032, 0.13237663515921655, 0.17668866886462276, 0.11366179673612573, -0.16130668312695076, 0.03746172978710703, -0.03894353184123872, 0.1990785909103912, 0.07441302866342599, 0.023865009499411633, 0.19389942974182742, 0.13408248044571747, 0.13514505039530855, 0.1493575483638765, -0.0936558362139204, -0.11798914268218294, -0.3295562251556295, -0.1220000040866719, -0.17581730545054097, 0.0436585798356611, -0.06347053353893543, -0.12125420730111353, 0.35730079737072457, 0.14228743801554594, 0.16735064872906663, 0.07290044265402879, 0.3216606445489665, 0.06502555157608914, -0.00982244752964204, 0.08668099745951094, 0.25389022807029027, 0.08219960245871667, 0.027216084552075685, -0.2043644244483146, 0.14666850354081687, 0.010281168544693416] |
1,802.02851 | On the Algebraic and Arithmetic structure of the monoid of Product-one
sequences II | Let $G$ be a finite group and $G'$ its commutator subgroup. By a sequence
over $G$, we mean a finite unordered sequence of terms from $G$, where
repetition is allowed, and we say that it is a product-one sequence if its
terms can be ordered such that their product equals the identity element of
$G$. The monoid $\mathcal B (G)$ of all product-one sequences over $G$ is a
finitely generated C-monoid whence it has a finite commutative class semigroup.
It is well-known that the class semigroup is a group if and only if $G$ is
abelian (equivalently, $\mathcal B (G)$ is Krull). In the present paper we show
that the class semigroup is Clifford (i.e., a union of groups) if and only if
$|G'| \le 2$ if and only if $\mathcal B (G)$ is seminormal, and we study sets
of lengths in $\mathcal B (G)$.
| math.AC math.CO | let g be a finite group and g its commutator subgroup by a sequence over g we mean a finite unordered sequence of terms from g where repetition is allowed and we say that it is a productone sequence if its terms can be ordered such that their product equals the identity element of g the monoid mathcal b g of all productone sequences over g is a finitely generated cmonoid whence it has a finite commutative class semigroup it is wellknown that the class semigroup is a group if and only if g is abelian equivalently mathcal b g is krull in the present paper we show that the class semigroup is clifford ie a union of groups if and only if g le 2 if and only if mathcal b g is seminormal and we study sets of lengths in mathcal b g | [['let', 'g', 'be', 'a', 'finite', 'group', 'and', 'g', 'its', 'commutator', 'subgroup', 'by', 'a', 'sequence', 'over', 'g', 'we', 'mean', 'a', 'finite', 'unordered', 'sequence', 'of', 'terms', 'from', 'g', 'where', 'repetition', 'is', 'allowed', 'and', 'we', 'say', 'that', 'it', 'is', 'a', 'productone', 'sequence', 'if', 'its', 'terms', 'can', 'be', 'ordered', 'such', 'that', 'their', 'product', 'equals', 'the', 'identity', 'element', 'of', 'g', 'the', 'monoid', 'mathcal', 'b', 'g', 'of', 'all', 'productone', 'sequences', 'over', 'g', 'is', 'a', 'finitely', 'generated', 'cmonoid', 'whence', 'it', 'has', 'a', 'finite', 'commutative', 'class', 'semigroup', 'it', 'is', 'wellknown', 'that', 'the', 'class', 'semigroup', 'is', 'a', 'group', 'if', 'and', 'only', 'if', 'g', 'is', 'abelian', 'equivalently', 'mathcal', 'b', 'g', 'is', 'krull', 'in', 'the', 'present', 'paper', 'we', 'show', 'that', 'the', 'class', 'semigroup', 'is', 'clifford', 'ie', 'a', 'union', 'of', 'groups', 'if', 'and', 'only', 'if', 'g', 'le', '2', 'if', 'and', 'only', 'if', 'mathcal', 'b', 'g', 'is', 'seminormal', 'and', 'we', 'study', 'sets', 'of', 'lengths', 'in', 'mathcal', 'b', 'g']] | [-0.1810167200746946, 0.19042272188623124, -0.07205515644131487, -0.017144292110363796, -0.11218370804433814, -0.13655352641298021, 0.013512760182493366, 0.4019854162147062, -0.38688946210054886, -0.1961672519915333, 0.110935135893265, -0.2876235550372965, -0.09766045591742215, 0.17878800384803778, -0.12654583546989467, -0.10497190500124513, 0.11276410436645772, 0.20611819573160675, -0.04147309467306412, -0.26211050970272887, 0.34637573283786577, -0.12658897176152095, 0.1694088975103417, 0.013511851082310185, 0.10444914427999821, -0.008735397938127991, 0.017476527201425698, 0.05024933514101172, -0.1314413528123421, 0.034991654657965734, 0.27164361545712584, 0.12443278377435894, 0.2945305108765347, -0.2880769891716126, -0.1335388657818031, 0.3028730130625061, 0.12327150298774035, -0.08155363530386239, 0.012914111850679748, -0.2183706046004469, 0.2439016470258745, -0.21778299688513572, -0.04095041823651021, -0.023539965018345457, 0.22950347525329562, -0.019264834488341067, -0.3275964837327289, -0.01881523242466048, 0.12081332445409822, 0.08804245250454794, 0.06293057688566882, -0.09206310113141727, -0.12044719077594992, 0.0841335822252505, -0.05044674153678999, 0.11730988339170129, 0.06141255302484044, -0.030990566052625783, -0.07030894916776258, 0.4240413255756721, -0.11957758458932706, -0.1924319030691145, 0.10448615105188866, -0.2376048638349554, -0.1281483493932885, 0.10011361957812268, 0.03267523142535032, 0.22454416348288456, -0.014915068795542337, 0.26957015113778954, -0.19294129263532037, 0.1178811540950038, 0.03865018633142528, -0.010778678231872618, 0.12314561201492324, 0.09987136628802142, 0.11486760653295075, 0.11521116883927283, 0.055105355775190726, 0.1424903062787861, -0.38076362090376076, -0.14021898195561436, -0.1889105100037543, 0.1637941297570554, -0.09000379579831336, -0.170501859873184, 0.3843752794588606, 0.0646026671521314, 0.10934443982033473, 0.10388846624927181, 0.17895190556171453, 0.08171820781555855, 0.060015471171128515, 0.15940700433566235, 0.01426419220580202, 0.2317768869900192, -0.1528776466164143, -0.17454502389268278, 0.02515053479065601, 0.21393390428016168] |
1,802.02852 | mGPfusion: Predicting protein stability changes with Gaussian process
kernel learning and data fusion | Proteins are commonly used by biochemical industry for numerous processes.
Refining these proteins' properties via mutations causes stability effects as
well. Accurate computational method to predict how mutations affect protein
stability are necessary to facilitate efficient protein design. However,
accuracy of predictive models is ultimately constrained by the limited
availability of experimental data. We have developed mGPfusion, a novel
Gaussian process (GP) method for predicting protein's stability changes upon
single and multiple mutations. This method complements the limited experimental
data with large amounts of molecular simulation data. We introduce a Bayesian
data fusion model that re-calibrates the experimental and in silico data
sources and then learns a predictive GP model from the combined data. Our
protein-specific model requires experimental data only regarding the protein of
interest and performs well even with few experimental measurements. The
mGPfusion models proteins by contact maps and infers the stability effects
caused by mutations with a mixture of graph kernels. Our results show that
mGPfusion outperforms state-of-the-art methods in predicting protein stability
on a dataset of 15 different proteins and that incorporating molecular
simulation data improves the model learning and prediction accuracy.
| stat.ML q-bio.BM q-bio.QM | proteins are commonly used by biochemical industry for numerous processes refining these proteins properties via mutations causes stability effects as well accurate computational method to predict how mutations affect protein stability are necessary to facilitate efficient protein design however accuracy of predictive models is ultimately constrained by the limited availability of experimental data we have developed mgpfusion a novel gaussian process gp method for predicting proteins stability changes upon single and multiple mutations this method complements the limited experimental data with large amounts of molecular simulation data we introduce a bayesian data fusion model that recalibrates the experimental and in silico data sources and then learns a predictive gp model from the combined data our proteinspecific model requires experimental data only regarding the protein of interest and performs well even with few experimental measurements the mgpfusion models proteins by contact maps and infers the stability effects caused by mutations with a mixture of graph kernels our results show that mgpfusion outperforms stateoftheart methods in predicting protein stability on a dataset of 15 different proteins and that incorporating molecular simulation data improves the model learning and prediction accuracy | [['proteins', 'are', 'commonly', 'used', 'by', 'biochemical', 'industry', 'for', 'numerous', 'processes', 'refining', 'these', 'proteins', 'properties', 'via', 'mutations', 'causes', 'stability', 'effects', 'as', 'well', 'accurate', 'computational', 'method', 'to', 'predict', 'how', 'mutations', 'affect', 'protein', 'stability', 'are', 'necessary', 'to', 'facilitate', 'efficient', 'protein', 'design', 'however', 'accuracy', 'of', 'predictive', 'models', 'is', 'ultimately', 'constrained', 'by', 'the', 'limited', 'availability', 'of', 'experimental', 'data', 'we', 'have', 'developed', 'mgpfusion', 'a', 'novel', 'gaussian', 'process', 'gp', 'method', 'for', 'predicting', 'proteins', 'stability', 'changes', 'upon', 'single', 'and', 'multiple', 'mutations', 'this', 'method', 'complements', 'the', 'limited', 'experimental', 'data', 'with', 'large', 'amounts', 'of', 'molecular', 'simulation', 'data', 'we', 'introduce', 'a', 'bayesian', 'data', 'fusion', 'model', 'that', 'recalibrates', 'the', 'experimental', 'and', 'in', 'silico', 'data', 'sources', 'and', 'then', 'learns', 'a', 'predictive', 'gp', 'model', 'from', 'the', 'combined', 'data', 'our', 'proteinspecific', 'model', 'requires', 'experimental', 'data', 'only', 'regarding', 'the', 'protein', 'of', 'interest', 'and', 'performs', 'well', 'even', 'with', 'few', 'experimental', 'measurements', 'the', 'mgpfusion', 'models', 'proteins', 'by', 'contact', 'maps', 'and', 'infers', 'the', 'stability', 'effects', 'caused', 'by', 'mutations', 'with', 'a', 'mixture', 'of', 'graph', 'kernels', 'our', 'results', 'show', 'that', 'mgpfusion', 'outperforms', 'stateoftheart', 'methods', 'in', 'predicting', 'protein', 'stability', 'on', 'a', 'dataset', 'of', '15', 'different', 'proteins', 'and', 'that', 'incorporating', 'molecular', 'simulation', 'data', 'improves', 'the', 'model', 'learning', 'and', 'prediction', 'accuracy']] | [-0.031156234615933028, 0.04526194910924401, -0.0449190847437969, 0.08002329357905867, -0.05339957853799225, -0.15668661813755513, 0.10122210955527682, 0.4021962112396635, -0.2474701105897385, -0.3276602173153992, 0.06754971868361682, -0.26804393944981436, -0.19532424249556116, 0.21517798584955994, -0.07815933158440937, 0.10964823518041021, 0.19657184213264695, -0.014785992617528606, 0.01262002508406357, -0.2313465211211556, 0.25424514614891824, 0.11096591238177791, 0.3238656925618328, 0.04057648184118412, 0.11805325703975815, -0.026350482557249325, -0.05128799520009848, 0.002270965959616406, -0.12759037888967978, 0.18083674417185422, 0.2871003199426375, 0.17139493835268801, 0.2738348964741954, -0.4368897080922159, -0.28823543732024487, 0.09704700058391218, 0.14354490296995287, 0.15528933970402847, -0.058243546393319405, -0.2908194927068087, 0.0923027019116587, -0.1364944734740802, -0.037352071487925624, -0.17432137029696135, -0.06296469701293816, 0.07830046289456477, -0.2959512886666362, 0.13778136858105738, 0.021176907899839583, 0.09628703339546117, -0.09125152058518862, -0.15231449698831545, -0.04111729803374938, 0.15750108844280164, 0.03331604455106376, 0.012599577846866782, 0.22185111946679192, -0.12825924897271018, -0.1486150174262753, 0.35833575990131145, -0.04242907476896841, -0.23110900077748522, 0.21118485008776988, -0.052739198682629454, -0.1894490681012832, 0.15286904448513142, 0.17394919580747423, 0.09174698377929387, -0.16728191953953556, 0.03267289703663048, 0.01413320663375079, 0.19527587527409196, 0.008400667630266197, -0.041631676524537066, 0.159399086687093, 0.2679602726793257, -0.02510963210220178, 0.11557598296310051, -0.11732695529723079, -0.11096493623899145, -0.18999034710389923, -0.07699342794716045, -0.15032099766696813, -0.030447006462171914, -0.10779737678091404, -0.1396997173799337, 0.38113208282088, 0.18540372187146537, 0.2017292725605105, 0.09824578565174855, 0.3063418162656167, -0.029946393779008297, 0.0834777112173978, 0.0034101355435346725, 0.15506842353391231, 0.06433640087714358, 0.07496585262318452, -0.22485585125809116, 0.15516981436565558, -0.02394034252852522] |
1,802.02853 | Time-dependent transport of a localized surface plasmon through a linear
array of metal nanoparticles: Precursor and normal mode contributions | We theoretically investigate the time-dependent transport of a localized
surface plasmon excitation through a linear array of identical and
equidistantly spaced metal nanoparticles. Two different signals propagating
through the array are found: one traveling with the group velocity of the
surface plasmon polaritons of the system and damped exponentially, and the
other running with the speed of light and decaying in a power-~law fashion, as
$x^{-1}$ and $x^{-2}$ for the transversal and longitudinal polarizations,
respectively. The latter resembles the Sommerfeld-Brillouin forerunner and has
not been identified in previous studies. The contribution of this signal
dominates the plasmon transport at large distances. In addition, even though
this signal is spread in the propagation direction and has the lateral
dimension larger than the wavelength, the field profile close to the chain axis
does not change with distance, indicating that this part of the signal is
confined to the array.
| cond-mat.mes-hall | we theoretically investigate the timedependent transport of a localized surface plasmon excitation through a linear array of identical and equidistantly spaced metal nanoparticles two different signals propagating through the array are found one traveling with the group velocity of the surface plasmon polaritons of the system and damped exponentially and the other running with the speed of light and decaying in a powerlaw fashion as x1 and x2 for the transversal and longitudinal polarizations respectively the latter resembles the sommerfeldbrillouin forerunner and has not been identified in previous studies the contribution of this signal dominates the plasmon transport at large distances in addition even though this signal is spread in the propagation direction and has the lateral dimension larger than the wavelength the field profile close to the chain axis does not change with distance indicating that this part of the signal is confined to the array | [['we', 'theoretically', 'investigate', 'the', 'timedependent', 'transport', 'of', 'a', 'localized', 'surface', 'plasmon', 'excitation', 'through', 'a', 'linear', 'array', 'of', 'identical', 'and', 'equidistantly', 'spaced', 'metal', 'nanoparticles', 'two', 'different', 'signals', 'propagating', 'through', 'the', 'array', 'are', 'found', 'one', 'traveling', 'with', 'the', 'group', 'velocity', 'of', 'the', 'surface', 'plasmon', 'polaritons', 'of', 'the', 'system', 'and', 'damped', 'exponentially', 'and', 'the', 'other', 'running', 'with', 'the', 'speed', 'of', 'light', 'and', 'decaying', 'in', 'a', 'powerlaw', 'fashion', 'as', 'x1', 'and', 'x2', 'for', 'the', 'transversal', 'and', 'longitudinal', 'polarizations', 'respectively', 'the', 'latter', 'resembles', 'the', 'sommerfeldbrillouin', 'forerunner', 'and', 'has', 'not', 'been', 'identified', 'in', 'previous', 'studies', 'the', 'contribution', 'of', 'this', 'signal', 'dominates', 'the', 'plasmon', 'transport', 'at', 'large', 'distances', 'in', 'addition', 'even', 'though', 'this', 'signal', 'is', 'spread', 'in', 'the', 'propagation', 'direction', 'and', 'has', 'the', 'lateral', 'dimension', 'larger', 'than', 'the', 'wavelength', 'the', 'field', 'profile', 'close', 'to', 'the', 'chain', 'axis', 'does', 'not', 'change', 'with', 'distance', 'indicating', 'that', 'this', 'part', 'of', 'the', 'signal', 'is', 'confined', 'to', 'the', 'array']] | [-0.17553030934222802, 0.1757248768354861, -0.0674358443000677, 0.013360861691228134, -0.04617152211167628, -0.13601407520694747, -0.013481717873491398, 0.42237051665706904, -0.2527038141946288, -0.27323217823353857, 0.07093934408471393, -0.3166861690859608, -0.10270623511755142, 0.20118052897924166, 0.05268932425980868, 0.009479357436502061, 0.032266213864303464, 0.017259387620946483, -0.03255709656910198, -0.1564908530563116, 0.252095339724756, 0.0570278961170262, 0.30278693370483056, 0.03386187465975479, 0.07320018555829619, 0.021148211851642392, 0.021428323990735066, 0.005548371857374298, -0.07604035459717991, 0.08131092079902436, 0.19508942495873136, 0.0010554604374860622, 0.22488687889409714, -0.41568267194009356, -0.21313606202602386, 0.07973320348517729, 0.20811523875018872, 0.12502466142177582, -0.03479357511533716, -0.25784560239424004, 0.032020042374806136, -0.09105690239871643, -0.1622454230515223, 0.06007247759768942, 0.03902408315475039, 0.041957061246772405, -0.2078071790525601, 0.09309636792769896, 0.055704349012044414, 0.04873274289527718, -0.021995465706742438, -0.10562499264670143, -0.05245844022922066, 0.09886993908998082, 0.09234367592852613, 0.0630810775550171, 0.13447144159375607, -0.08321608595358411, -0.05874823840322341, 0.3524952029055428, -0.12435710670509245, -0.1688624221457764, 0.21061253909229105, -0.22422711088596906, -0.020539129506891633, 0.19082551739070894, 0.19246379656362392, 0.10108418003687648, -0.11324589104402721, 0.054681169569213574, -0.024119947863533636, 0.18896770504854468, 0.08094661468544936, 0.0680032870985669, 0.2285670320484407, 0.1495399114606129, 0.05587101037785107, 0.13259339357328723, -0.1580867080974589, -0.04789547411230754, -0.2440081347286112, -0.14243161347441274, -0.1884749906682441, 0.022672944116369713, -0.06371711899263492, -0.18652326078946088, 0.4412418859282217, 0.08497441731847144, 0.18599275449214844, 0.025926765178403102, 0.28272387755363165, 0.13452431244568164, 0.09041985803834941, 0.09517689840868115, 0.30209719928196904, 0.14650649892888506, 0.10184044458231806, -0.2641278820977147, 0.04106200513030801, -0.035379808912446506] |
1,802.02854 | Numerical Algorithm for Exact Finite Temperature Spectra and Its
Application to Frustrated Quantum Spin Systems | A numerical algorithm to calculate exact finite-temperature spectra of
many-body lattice Hamiltonians is formulated by combining the typicality
approach and the shifted Krylov subspace method. The combined algorithm, which
we name finite-temperature shifted Krylov subspace method for simulating
spectra (FTK$\omega$), efficiently reproduces the canonical-ensemble
probability distribution at finite temperatures with the computational cost
proportional to the Fock space dimension. The present FTK$\omega$ enables us to
exactly calculate finite-temperature spectra of many-body systems whose system
sizes are twice larger than those handled by the canonical ensemble average and
allows us to access the frequency domain without sequential real-time evolution
often used in previous studies. By employing the reweighting method with the
present algorithm, we obtain significant reduction of the numerical costs for
temperature sweeps. Application to the Kiteav-Heisenberg model (KHM) on a
honeycomb lattice demonstrates the capability of the FTK$\omega$. The KHM shows
quantum phase transitions from the quantum spin liquid (QSL) phase to
magnetically ordered phases when the finite Heisenberg exchange coupling is
introduced. We examine temperature dependence of dynamical spin structure
factors of the KHM in proximity to the QSL. It is clarified that the crossover
from a spin-excitation continuum, which is a characteristic of the QSL, to a
damped high-energy magnon mode occurs at temperatures higher than the energy
scale of the Heisenberg couplings or the spin gap that is a signature of the
QSL at zero temperature. The crossover and the closeness to the Kitaev's QSL
are quantitatively measured by the width of the excitation continuum or the
magnon spectrum. The present results shed new light on analysis of neutron
scattering and other spectroscopy measurements on QSL candidates.
| cond-mat.str-el | a numerical algorithm to calculate exact finitetemperature spectra of manybody lattice hamiltonians is formulated by combining the typicality approach and the shifted krylov subspace method the combined algorithm which we name finitetemperature shifted krylov subspace method for simulating spectra ftkomega efficiently reproduces the canonicalensemble probability distribution at finite temperatures with the computational cost proportional to the fock space dimension the present ftkomega enables us to exactly calculate finitetemperature spectra of manybody systems whose system sizes are twice larger than those handled by the canonical ensemble average and allows us to access the frequency domain without sequential realtime evolution often used in previous studies by employing the reweighting method with the present algorithm we obtain significant reduction of the numerical costs for temperature sweeps application to the kiteavheisenberg model khm on a honeycomb lattice demonstrates the capability of the ftkomega the khm shows quantum phase transitions from the quantum spin liquid qsl phase to magnetically ordered phases when the finite heisenberg exchange coupling is introduced we examine temperature dependence of dynamical spin structure factors of the khm in proximity to the qsl it is clarified that the crossover from a spinexcitation continuum which is a characteristic of the qsl to a damped highenergy magnon mode occurs at temperatures higher than the energy scale of the heisenberg couplings or the spin gap that is a signature of the qsl at zero temperature the crossover and the closeness to the kitaevs qsl are quantitatively measured by the width of the excitation continuum or the magnon spectrum the present results shed new light on analysis of neutron scattering and other spectroscopy measurements on qsl candidates | [['a', 'numerical', 'algorithm', 'to', 'calculate', 'exact', 'finitetemperature', 'spectra', 'of', 'manybody', 'lattice', 'hamiltonians', 'is', 'formulated', 'by', 'combining', 'the', 'typicality', 'approach', 'and', 'the', 'shifted', 'krylov', 'subspace', 'method', 'the', 'combined', 'algorithm', 'which', 'we', 'name', 'finitetemperature', 'shifted', 'krylov', 'subspace', 'method', 'for', 'simulating', 'spectra', 'ftkomega', 'efficiently', 'reproduces', 'the', 'canonicalensemble', 'probability', 'distribution', 'at', 'finite', 'temperatures', 'with', 'the', 'computational', 'cost', 'proportional', 'to', 'the', 'fock', 'space', 'dimension', 'the', 'present', 'ftkomega', 'enables', 'us', 'to', 'exactly', 'calculate', 'finitetemperature', 'spectra', 'of', 'manybody', 'systems', 'whose', 'system', 'sizes', 'are', 'twice', 'larger', 'than', 'those', 'handled', 'by', 'the', 'canonical', 'ensemble', 'average', 'and', 'allows', 'us', 'to', 'access', 'the', 'frequency', 'domain', 'without', 'sequential', 'realtime', 'evolution', 'often', 'used', 'in', 'previous', 'studies', 'by', 'employing', 'the', 'reweighting', 'method', 'with', 'the', 'present', 'algorithm', 'we', 'obtain', 'significant', 'reduction', 'of', 'the', 'numerical', 'costs', 'for', 'temperature', 'sweeps', 'application', 'to', 'the', 'kiteavheisenberg', 'model', 'khm', 'on', 'a', 'honeycomb', 'lattice', 'demonstrates', 'the', 'capability', 'of', 'the', 'ftkomega', 'the', 'khm', 'shows', 'quantum', 'phase', 'transitions', 'from', 'the', 'quantum', 'spin', 'liquid', 'qsl', 'phase', 'to', 'magnetically', 'ordered', 'phases', 'when', 'the', 'finite', 'heisenberg', 'exchange', 'coupling', 'is', 'introduced', 'we', 'examine', 'temperature', 'dependence', 'of', 'dynamical', 'spin', 'structure', 'factors', 'of', 'the', 'khm', 'in', 'proximity', 'to', 'the', 'qsl', 'it', 'is', 'clarified', 'that', 'the', 'crossover', 'from', 'a', 'spinexcitation', 'continuum', 'which', 'is', 'a', 'characteristic', 'of', 'the', 'qsl', 'to', 'a', 'damped', 'highenergy', 'magnon', 'mode', 'occurs', 'at', 'temperatures', 'higher', 'than', 'the', 'energy', 'scale', 'of', 'the', 'heisenberg', 'couplings', 'or', 'the', 'spin', 'gap', 'that', 'is', 'a', 'signature', 'of', 'the', 'qsl', 'at', 'zero', 'temperature', 'the', 'crossover', 'and', 'the', 'closeness', 'to', 'the', 'kitaevs', 'qsl', 'are', 'quantitatively', 'measured', 'by', 'the', 'width', 'of', 'the', 'excitation', 'continuum', 'or', 'the', 'magnon', 'spectrum', 'the', 'present', 'results', 'shed', 'new', 'light', 'on', 'analysis', 'of', 'neutron', 'scattering', 'and', 'other', 'spectroscopy', 'measurements', 'on', 'qsl', 'candidates']] | [-0.12661694656126202, 0.1748182335010454, -0.09872736121976265, 0.07046304571278462, -0.035235724006607023, -0.1410281643543082, 0.09218474115477875, 0.35973974378020673, -0.25153671957690404, -0.2729166855035281, 0.05049002006115323, -0.2904032455904396, -0.08589822225169175, 0.18027204818402728, 0.048163217725232244, 0.05645819682438202, 0.013266445973163678, 0.016970756940146978, -0.12644163711725181, -0.2189876444279906, 0.28037979213770964, 0.06752239316098255, 0.2974567930214107, 0.04827379717802008, 0.07282877397137108, 0.009868490425179954, 0.045134983515297926, -0.0021216994855354577, -0.13967200801001767, 0.08004753766753883, 0.21556753285069674, 0.011502232117129974, 0.1842981379854286, -0.37906964005971394, -0.21516038369973778, 0.05612876325483537, 0.14788679115439732, 0.1700599348526103, 0.0021305829812600105, -0.29912138145279, 0.027788913038643337, -0.17643296235344477, -0.15815297008828363, -0.12927204788559013, -0.04646351021559288, -0.03481036042287963, -0.2283796068740129, 0.10334984360228258, 0.03496584563453561, 0.06541971849812264, -0.05267575344230324, -0.11312635288944606, -0.023638568259775637, 0.074109760076519, 0.012868544547732367, 0.049911875436427416, 0.13050301350842886, -0.08731653583063571, -0.13424072018565816, 0.3723114820473172, -0.06823940978620495, -0.13139161555639778, 0.18429668442070207, -0.16851688326014144, -0.09741437045072585, 0.18937913589351982, 0.11882752439145136, 0.0904360690775017, -0.11206782278351494, 0.08668941774888447, -0.011451414079163913, 0.17621345452067477, -0.008484748652618793, 0.0542423347287156, 0.21184160823123185, 0.16412119989809407, 0.05661176832013384, 0.16872236367241755, -0.11841648141551694, -0.1432478627483188, -0.23243194994068256, -0.13514854989523345, -0.249001973344302, 0.04486725094460848, -0.08432783237744675, -0.16450812756170138, 0.40743880099616947, 0.16638139859661116, 0.18368930821501028, 0.038378260498521506, 0.29173906068576294, 0.14219521257500337, 0.06421924627782707, 0.07496092414086754, 0.2172210722954737, 0.1694611544513868, 0.08233777107498436, -0.3314690624786265, 0.021893846648917706, 0.11073444875095177] |
1,802.02855 | The Interhospital Transfer Network for Very Low Birth Weight Infants in
the United States | Very low birth weight (VLBW) infants require specialized care in neonatal
intensive care units. In the United States (U.S.), such infants frequently are
transferred between hospitals. Although these neonatal transfer networks are
important, both economically and for infant morbidity and mortality, the
national-level pattern of neonatal transfers is largely unknown. Using data
from Vermont Oxford Network on 44,753 births, 2,122 hospitals, and 9,722
inter-hospital infant transfers from 2015, we performed the largest analysis to
date on the inter-hospital transfer network for VLBW infants in the U.S. We
find that transfers are organized around regional communities, but that despite
being largely within state boundaries, most communities often contain at least
two hospitals in different states. To classify the structural variation in
transfer pattern amongst these communities, we applied a spectral measure for
regionalization and found an association between a community's degree of
regionalization and their infant transfer rate, which was not utilized in
detecting communities. We also demonstrate that the established measures of
network centrality and hierarchy, e.g., the community-wide entropy in PageRank
or betweenness centrality and number of distinct `layers' within a community,
correlate weakly with our regionalization index and were not significantly
associated with metrics on infant transfer rate. Our results suggest that the
regionalization index captures novel information about the structural
properties of VLBW infant transfer networks, have the practical implication of
characterizing neonatal care in the U.S., and may apply more broadly to the
role of centralizing forces in organizing complex adaptive systems.
| physics.soc-ph cs.SI | very low birth weight vlbw infants require specialized care in neonatal intensive care units in the united states us such infants frequently are transferred between hospitals although these neonatal transfer networks are important both economically and for infant morbidity and mortality the nationallevel pattern of neonatal transfers is largely unknown using data from vermont oxford network on 44753 births 2122 hospitals and 9722 interhospital infant transfers from 2015 we performed the largest analysis to date on the interhospital transfer network for vlbw infants in the us we find that transfers are organized around regional communities but that despite being largely within state boundaries most communities often contain at least two hospitals in different states to classify the structural variation in transfer pattern amongst these communities we applied a spectral measure for regionalization and found an association between a communitys degree of regionalization and their infant transfer rate which was not utilized in detecting communities we also demonstrate that the established measures of network centrality and hierarchy eg the communitywide entropy in pagerank or betweenness centrality and number of distinct layers within a community correlate weakly with our regionalization index and were not significantly associated with metrics on infant transfer rate our results suggest that the regionalization index captures novel information about the structural properties of vlbw infant transfer networks have the practical implication of characterizing neonatal care in the us and may apply more broadly to the role of centralizing forces in organizing complex adaptive systems | [['very', 'low', 'birth', 'weight', 'vlbw', 'infants', 'require', 'specialized', 'care', 'in', 'neonatal', 'intensive', 'care', 'units', 'in', 'the', 'united', 'states', 'us', 'such', 'infants', 'frequently', 'are', 'transferred', 'between', 'hospitals', 'although', 'these', 'neonatal', 'transfer', 'networks', 'are', 'important', 'both', 'economically', 'and', 'for', 'infant', 'morbidity', 'and', 'mortality', 'the', 'nationallevel', 'pattern', 'of', 'neonatal', 'transfers', 'is', 'largely', 'unknown', 'using', 'data', 'from', 'vermont', 'oxford', 'network', 'on', '44753', 'births', '2122', 'hospitals', 'and', '9722', 'interhospital', 'infant', 'transfers', 'from', '2015', 'we', 'performed', 'the', 'largest', 'analysis', 'to', 'date', 'on', 'the', 'interhospital', 'transfer', 'network', 'for', 'vlbw', 'infants', 'in', 'the', 'us', 'we', 'find', 'that', 'transfers', 'are', 'organized', 'around', 'regional', 'communities', 'but', 'that', 'despite', 'being', 'largely', 'within', 'state', 'boundaries', 'most', 'communities', 'often', 'contain', 'at', 'least', 'two', 'hospitals', 'in', 'different', 'states', 'to', 'classify', 'the', 'structural', 'variation', 'in', 'transfer', 'pattern', 'amongst', 'these', 'communities', 'we', 'applied', 'a', 'spectral', 'measure', 'for', 'regionalization', 'and', 'found', 'an', 'association', 'between', 'a', 'communitys', 'degree', 'of', 'regionalization', 'and', 'their', 'infant', 'transfer', 'rate', 'which', 'was', 'not', 'utilized', 'in', 'detecting', 'communities', 'we', 'also', 'demonstrate', 'that', 'the', 'established', 'measures', 'of', 'network', 'centrality', 'and', 'hierarchy', 'eg', 'the', 'communitywide', 'entropy', 'in', 'pagerank', 'or', 'betweenness', 'centrality', 'and', 'number', 'of', 'distinct', 'layers', 'within', 'a', 'community', 'correlate', 'weakly', 'with', 'our', 'regionalization', 'index', 'and', 'were', 'not', 'significantly', 'associated', 'with', 'metrics', 'on', 'infant', 'transfer', 'rate', 'our', 'results', 'suggest', 'that', 'the', 'regionalization', 'index', 'captures', 'novel', 'information', 'about', 'the', 'structural', 'properties', 'of', 'vlbw', 'infant', 'transfer', 'networks', 'have', 'the', 'practical', 'implication', 'of', 'characterizing', 'neonatal', 'care', 'in', 'the', 'us', 'and', 'may', 'apply', 'more', 'broadly', 'to', 'the', 'role', 'of', 'centralizing', 'forces', 'in', 'organizing', 'complex', 'adaptive', 'systems']] | [-0.0745266608471505, 0.0933707428231767, -0.06332663567746366, 0.11724034045516968, -0.05282081358908283, -0.10266441000651468, 0.0667107227318035, 0.4098761866700428, -0.23252016539379478, -0.3293806297246613, 0.12555272918250335, -0.31401595173495983, -0.17028894062127056, 0.17260152519938404, -0.1048515171085846, 0.00597945574211863, 0.11067627581444468, 0.06687569841915696, 0.029003251992427738, -0.2254506132742467, 0.3068066490573562, 0.07027472972808298, 0.321107271662336, 0.06693210514273865, 0.059901813263543074, -0.012545665574533295, -0.05146232671667206, -0.007589382734746203, -0.07259451281070066, 0.1743372568590297, 0.33467503110320146, 0.1929014393393997, 0.3285648948243581, -0.42436120104167824, -0.21884365334831687, 0.11567308815929285, 0.11193151721144663, 0.056245530791453675, -0.01911962923743187, -0.26057965424169655, 0.06395520121008273, -0.19899843526242372, -0.023982317436078548, -0.09514997869129639, 0.02454089911843165, 0.0022972485465228495, -0.24500183690116117, 0.13345093096109503, -0.01319135266956527, 0.12484445798784218, -0.08925964569572882, -0.13950812775297244, -0.05176761801439253, 0.2397463139683424, 0.05241500606475598, 0.013648856721321998, 0.14404362184187966, -0.15989988199545818, -0.09665894731475148, 0.3176696263830955, 0.0272232371773032, -0.1349621994665262, 0.24350955190275572, -0.13753306098553653, -0.17226013822253977, 0.0815014151706214, 0.23633512752400018, 0.07823366724428035, -0.16884774057442814, -0.0427762314895878, 0.024155831532091027, 0.1787053347908707, 0.08996264576288479, -0.016418678265340117, 0.19482803049551184, 0.16785809806882873, 0.030022149402859875, 0.0815863457271706, -0.10309144271338505, -0.11696568646368162, -0.1667293990155959, -0.13449618471031125, -0.14036584177828001, 0.030294378396928934, -0.08350380701353256, -0.12983441357269945, 0.40075283847010335, 0.15237577575834252, 0.18517906914084134, 0.04408220767595782, 0.20079474433417593, 0.009744369343100193, 0.15247555353826928, 0.10479775435014144, 0.2005043286918701, 0.07679307094509598, 0.13912184935347907, -0.19940284331721708, 0.15198744121279417, -0.021140637930698137] |
1,802.02856 | Unsupervised Classification of Galaxies. I. ICA feature selection | Subjective classification of galaxies can mislead us in the quest of the
origin regarding formation and evolution of galaxies since this is necessarily
limited to a few features. The human mind is not able to apprehend the complex
correlations in a manyfold parameter space, and multivariate analyses are the
best tools to understand the differences among various kinds of objects. In
this series of papers, an objective classification of 362,923 galaxies from the
Value Added Galaxy Catalogue (VAGC) is carried out with the help of two methods
of multivariate analysis. First, Independent Component Analysis (ICA) is used
to determine a set of derived independent components that are linear
combinations of 47 observed features (viz. ionized lines, Lick indices,
photometric and morphological properties, star formation rates etc.) of the
galaxies. Subsequently, a K-means cluster analysis is applied on the nine
independent components to obtain ten distinct and homogeneous groups. In this
first paper, we describe the methods and the main results. It appears that the
nine Independent Components represent a complete physical description of
galaxies (velocity dispersion, ionisation, metallicity, surface brightness and
structure). We find that our ten groups can be essentially placed into
traditional and empirical classes (from colour-magnitude and emission-line
diagnostic diagrams, early- vs late-types) despite the classical corresponding
features (colour, line ratios and morphology) being not significantly
correlated with the nine Independent Components. More detailed physical
interpretation of the groups will be performed in subsequent papers.
| astro-ph.CO stat.ML | subjective classification of galaxies can mislead us in the quest of the origin regarding formation and evolution of galaxies since this is necessarily limited to a few features the human mind is not able to apprehend the complex correlations in a manyfold parameter space and multivariate analyses are the best tools to understand the differences among various kinds of objects in this series of papers an objective classification of 362923 galaxies from the value added galaxy catalogue vagc is carried out with the help of two methods of multivariate analysis first independent component analysis ica is used to determine a set of derived independent components that are linear combinations of 47 observed features viz ionized lines lick indices photometric and morphological properties star formation rates etc of the galaxies subsequently a kmeans cluster analysis is applied on the nine independent components to obtain ten distinct and homogeneous groups in this first paper we describe the methods and the main results it appears that the nine independent components represent a complete physical description of galaxies velocity dispersion ionisation metallicity surface brightness and structure we find that our ten groups can be essentially placed into traditional and empirical classes from colourmagnitude and emissionline diagnostic diagrams early vs latetypes despite the classical corresponding features colour line ratios and morphology being not significantly correlated with the nine independent components more detailed physical interpretation of the groups will be performed in subsequent papers | [['subjective', 'classification', 'of', 'galaxies', 'can', 'mislead', 'us', 'in', 'the', 'quest', 'of', 'the', 'origin', 'regarding', 'formation', 'and', 'evolution', 'of', 'galaxies', 'since', 'this', 'is', 'necessarily', 'limited', 'to', 'a', 'few', 'features', 'the', 'human', 'mind', 'is', 'not', 'able', 'to', 'apprehend', 'the', 'complex', 'correlations', 'in', 'a', 'manyfold', 'parameter', 'space', 'and', 'multivariate', 'analyses', 'are', 'the', 'best', 'tools', 'to', 'understand', 'the', 'differences', 'among', 'various', 'kinds', 'of', 'objects', 'in', 'this', 'series', 'of', 'papers', 'an', 'objective', 'classification', 'of', '362923', 'galaxies', 'from', 'the', 'value', 'added', 'galaxy', 'catalogue', 'vagc', 'is', 'carried', 'out', 'with', 'the', 'help', 'of', 'two', 'methods', 'of', 'multivariate', 'analysis', 'first', 'independent', 'component', 'analysis', 'ica', 'is', 'used', 'to', 'determine', 'a', 'set', 'of', 'derived', 'independent', 'components', 'that', 'are', 'linear', 'combinations', 'of', '47', 'observed', 'features', 'viz', 'ionized', 'lines', 'lick', 'indices', 'photometric', 'and', 'morphological', 'properties', 'star', 'formation', 'rates', 'etc', 'of', 'the', 'galaxies', 'subsequently', 'a', 'kmeans', 'cluster', 'analysis', 'is', 'applied', 'on', 'the', 'nine', 'independent', 'components', 'to', 'obtain', 'ten', 'distinct', 'and', 'homogeneous', 'groups', 'in', 'this', 'first', 'paper', 'we', 'describe', 'the', 'methods', 'and', 'the', 'main', 'results', 'it', 'appears', 'that', 'the', 'nine', 'independent', 'components', 'represent', 'a', 'complete', 'physical', 'description', 'of', 'galaxies', 'velocity', 'dispersion', 'ionisation', 'metallicity', 'surface', 'brightness', 'and', 'structure', 'we', 'find', 'that', 'our', 'ten', 'groups', 'can', 'be', 'essentially', 'placed', 'into', 'traditional', 'and', 'empirical', 'classes', 'from', 'colourmagnitude', 'and', 'emissionline', 'diagnostic', 'diagrams', 'early', 'vs', 'latetypes', 'despite', 'the', 'classical', 'corresponding', 'features', 'colour', 'line', 'ratios', 'and', 'morphology', 'being', 'not', 'significantly', 'correlated', 'with', 'the', 'nine', 'independent', 'components', 'more', 'detailed', 'physical', 'interpretation', 'of', 'the', 'groups', 'will', 'be', 'performed', 'in', 'subsequent', 'papers']] | [-0.049804975550475736, 0.04672627684259955, -0.1281228486835262, 0.08145529197596045, -0.09612088031983951, -0.07297660981628538, 0.029605252859162923, 0.41095991841896234, -0.1807791574451662, -0.32694841554325266, 0.06837736034343588, -0.2901919435599219, -0.09984567847844782, 0.19941275609016884, -0.04342619081864418, -0.0049996279383283425, 0.049343383904562284, -0.032433064796289005, -0.05639087985283537, -0.3117720625290284, 0.31667618894894306, 0.019498442141812736, 0.2548889298726, -0.042526845950475435, 0.04312936970967774, -0.05649010667486622, -0.15117975902941938, 0.02587474268154237, -0.1206231259891526, 0.09669470073955165, 0.28334051619680456, 0.1543086834284376, 0.23466070920872203, -0.35376087878399104, -0.18558567987707586, 0.10351716683806568, 0.19509465899417114, 0.04157055157603759, -0.0029842146799699365, -0.259457465503424, 0.055266616337190745, -0.13348837839429645, -0.13802144345551162, -0.030870689416387594, 0.033368311234418364, 0.03344079283247623, -0.21291915624983554, 0.08682084598078321, 0.04874538958775101, 0.11391216928683916, -0.09237296636496528, -0.13008327378449425, -0.0360253865231752, 0.16070565385191496, 0.01974078641180344, 0.011244962231642803, 0.16881665347688596, -0.11743084104214715, -0.07820132079976216, 0.39837006468748104, -0.03627940605126195, -0.11501194811643149, 0.2540104980447322, -0.1439147822714758, -0.20277166789125303, 0.11309360053934851, 0.16689120122341053, 0.0890300785678723, -0.18448104464150059, -0.013012207568262041, -0.0058379724774197915, 0.21447320891222602, 0.029228705105813758, 0.041016870369738605, 0.25376438653151806, 0.09915886426904887, 0.01069721953153622, 0.10418561360353833, -0.11816273708097731, -0.0466062985439548, -0.27250719766028453, -0.12502609997749983, -0.11919116778634646, 0.02910569497057083, -0.12061679504274823, -0.15450874492979877, 0.43171792761304306, 0.11803952553304567, 0.22067279267947137, 0.021231686929240823, 0.2860993709202098, 0.06804779573286719, 0.0913185958086584, 0.05490907936621363, 0.23973020636160874, 0.17344290286379518, 0.05279045479305057, -0.18999332569586902, 0.09903014721487001, 0.026721135066956343] |
1,802.02857 | Dimension dependence of factorization problems: Hardy spaces and
$SL_n^\infty$ | Given $1 \leq p < \infty$, let $W_n$ denote the finite-dimensional dyadic
Hardy space $H_n^p$, its dual or $SL_n^\infty$. We prove the following
quantitative result: The identity operator on $W_n$ factors through any
operator $T : W_N\to W_N$ which has large diagonal with respect to the Haar
system, where $N$ depends \emph{linearly} on $n$.
| math.FA | given 1 leq p infty let w_n denote the finitedimensional dyadic hardy space h_np its dual or sl_ninfty we prove the following quantitative result the identity operator on w_n factors through any operator t w_nto w_n which has large diagonal with respect to the haar system where n depends emphlinearly on n | [['given', '1', 'leq', 'p', 'infty', 'let', 'w_n', 'denote', 'the', 'finitedimensional', 'dyadic', 'hardy', 'space', 'h_np', 'its', 'dual', 'or', 'sl_ninfty', 'we', 'prove', 'the', 'following', 'quantitative', 'result', 'the', 'identity', 'operator', 'on', 'w_n', 'factors', 'through', 'any', 'operator', 't', 'w_nto', 'w_n', 'which', 'has', 'large', 'diagonal', 'with', 'respect', 'to', 'the', 'haar', 'system', 'where', 'n', 'depends', 'emphlinearly', 'on', 'n']] | [-0.16715291509404778, 0.18864551348611713, -0.01832447148859501, -0.048828657194972036, -0.05188738640397787, -0.19874851214699446, -0.0007875224109739065, 0.28227644503116606, -0.33717641070485116, -0.11345370251336134, 0.04806340559385717, -0.34059697097167374, -0.07686246443074196, 0.119188921446912, -0.0962477190932259, 0.012372893317369744, 0.014221782395616174, 0.1801272749970667, -0.09570751118008047, -0.23419475711882115, 0.32914842657744886, -0.07979787100106478, 0.21514998939353971, -0.0004668192099779844, 0.09563190120272339, 0.06470891200471669, 0.010870694359764456, -0.09406266813224647, -0.19581888085231186, 0.059267564564943316, 0.21035691873170437, 0.09859661613823846, 0.31801227539777754, -0.37566870827227833, -0.08032047877088189, 0.2934331545513123, 0.2167507484916132, -0.153440689437557, 0.07884984510019422, -0.3115362934116274, 0.13729914341121913, -0.11685828126966953, -0.14624206038191914, -0.04490570291876793, 0.11695519845932723, 0.011154145915061236, -0.37724475853145123, 0.014203738309442998, 0.12430500795133412, 0.05081842770799994, -0.05698512773960829, -0.19847463758429512, -0.0327911239117384, 0.10297178933862597, -0.0010946539882570505, 0.15281765141524375, 0.07431425525806844, 0.015854746177792547, -0.09391885538585484, 0.3188851190730929, -0.10461410192307084, -0.2704267270117998, 0.0632024568412453, -0.2821516340225935, -0.13411823334172368, -0.012926160059869289, 0.08158537216018885, 0.15795874029397963, 0.0074843506142497065, 0.333896988844499, -0.15776890464127064, 0.1213600091310218, 0.07560892211273312, 0.05841772187501192, 0.026137259611859916, 0.030307772932574154, 0.11872797164134681, 0.12136864673346281, 0.04015082353755133, -0.005533745111897588, -0.36167721889913085, -0.15850783220492304, -0.2613030577544123, 0.21660625150427223, -0.2394063251838088, -0.16228911865502596, 0.2974752487894148, 0.09365172737278044, 0.2534408251498826, 0.1652976305433549, 0.15215016655623914, 0.14904457222670317, 0.03636171261779964, 0.11401255746604874, 0.00046995945274829864, 0.20226492639631033, -0.010280064223334193, -0.20995373480021953, 0.021195236817002295, 0.25832174671348185] |
1,802.02858 | Non-resonant tori in symplectic twist maps without conjugate points | We study the dynamics of a symplectic twist map without conjugate points. We
show that in a neighborhood of a totally periodic Lagrangian manifold, there
exists a large family of invariant Lagrangian tori on which the twist map is
conjugated to a translation of non-resonant vector.
| math.DS | we study the dynamics of a symplectic twist map without conjugate points we show that in a neighborhood of a totally periodic lagrangian manifold there exists a large family of invariant lagrangian tori on which the twist map is conjugated to a translation of nonresonant vector | [['we', 'study', 'the', 'dynamics', 'of', 'a', 'symplectic', 'twist', 'map', 'without', 'conjugate', 'points', 'we', 'show', 'that', 'in', 'a', 'neighborhood', 'of', 'a', 'totally', 'periodic', 'lagrangian', 'manifold', 'there', 'exists', 'a', 'large', 'family', 'of', 'invariant', 'lagrangian', 'tori', 'on', 'which', 'the', 'twist', 'map', 'is', 'conjugated', 'to', 'a', 'translation', 'of', 'nonresonant', 'vector']] | [-0.28861585516563576, 0.11748711185772782, -0.09517700111736423, 0.06502184332803944, -0.059078240058506315, -0.10360764569359952, 0.026104931481708976, 0.36901933303021867, -0.3043646933105977, -0.16647726993845857, 0.03697915859874743, -0.2589356750452324, -0.2233147920595239, 0.1548986914365188, -0.08870779179003717, 0.046433429962590984, 0.10322620392696041, 0.07881782384103407, -0.14479573506801185, -0.14510980601240273, 0.42548212943517644, -0.08743146514398573, 0.18872864422914776, 0.016550232332361782, 0.20617472536801157, -0.013326990701582121, 0.03156287591580464, 0.015268019360044727, -0.1410348602305179, 0.11826634931418559, 0.17578998248538244, 0.04375734284479657, 0.18478114935367004, -0.3288251754787305, -0.19826386533373885, 0.19311956256380022, 0.10590824671089649, 0.07175217079676931, -0.06743484198206874, -0.2562930137728867, 0.12214875521907664, -0.1023337676635255, -0.17961800578252776, -0.15891473044251578, 0.034846208615066564, -0.03480012288175361, -0.24538960342254976, -0.047104638029375805, 0.1406701088518552, 0.1690125120398791, -0.024873060457732365, -0.005782041192540656, -0.10826738703105113, 0.06323448650579414, 0.04782721940326788, 0.15891961255819415, 0.1542949104661365, -0.09106834319865574, -0.07950694784117134, 0.3844449766139682, -0.14359783312386792, -0.3503762491290336, 0.13103473307969776, -0.13859775944855873, -0.20638863904320676, 0.19401279683022396, 0.17762144727875356, 0.13942977364944376, -0.10430305580730023, 0.1781152104149046, -0.14947394779680864, 0.13422181926991628, 0.078095233189347, -0.07455087863111301, 0.17274464787814117, 0.08060246765228879, 0.17160728033227118, 0.1375551200269357, -0.07181122011768268, -0.17045040922644344, -0.3383598359220702, -0.19434293014321313, -0.1264076978271908, 0.14483579987174142, -0.07226409950880738, -0.2434502779506147, 0.43370874495366996, 0.014231887863665495, 0.2728327618425955, 0.04969669854440524, 0.2449606660039812, 0.06384390205873744, 0.09018054987182436, 0.08565674016616591, 0.1698931470240021, 0.1335079812232162, -0.043842275535849774, -0.17160470792821245, -0.1015972112831862, 0.15343655271293677] |
1,802.02859 | Frequency-encoded linear cluster states with coherent Raman photons | Entangled multi-qubit states are an essential resource for quantum
information and computation. Solid-state emitters can mediate interactions
between subsequently emitted photons via their spin, thus offering a route
towards generating entangled multi-photon states. However, existing schemes
typically rely on the incoherent emission of single photons and suffer from
severe practical limitations, for self-assembled quantum dots most notably the
limited spin coherence time due to Overhauser magnetic field fluctuations. We
here propose an alternative approach of employing spin-flip Raman scattering
events of self-assembled quantum dots in Voigt geometry. We argue that weakly
driven hole spins constitute a promising platform for the practical generation
of frequency-entangled photonic cluster states.
| quant-ph | entangled multiqubit states are an essential resource for quantum information and computation solidstate emitters can mediate interactions between subsequently emitted photons via their spin thus offering a route towards generating entangled multiphoton states however existing schemes typically rely on the incoherent emission of single photons and suffer from severe practical limitations for selfassembled quantum dots most notably the limited spin coherence time due to overhauser magnetic field fluctuations we here propose an alternative approach of employing spinflip raman scattering events of selfassembled quantum dots in voigt geometry we argue that weakly driven hole spins constitute a promising platform for the practical generation of frequencyentangled photonic cluster states | [['entangled', 'multiqubit', 'states', 'are', 'an', 'essential', 'resource', 'for', 'quantum', 'information', 'and', 'computation', 'solidstate', 'emitters', 'can', 'mediate', 'interactions', 'between', 'subsequently', 'emitted', 'photons', 'via', 'their', 'spin', 'thus', 'offering', 'a', 'route', 'towards', 'generating', 'entangled', 'multiphoton', 'states', 'however', 'existing', 'schemes', 'typically', 'rely', 'on', 'the', 'incoherent', 'emission', 'of', 'single', 'photons', 'and', 'suffer', 'from', 'severe', 'practical', 'limitations', 'for', 'selfassembled', 'quantum', 'dots', 'most', 'notably', 'the', 'limited', 'spin', 'coherence', 'time', 'due', 'to', 'overhauser', 'magnetic', 'field', 'fluctuations', 'we', 'here', 'propose', 'an', 'alternative', 'approach', 'of', 'employing', 'spinflip', 'raman', 'scattering', 'events', 'of', 'selfassembled', 'quantum', 'dots', 'in', 'voigt', 'geometry', 'we', 'argue', 'that', 'weakly', 'driven', 'hole', 'spins', 'constitute', 'a', 'promising', 'platform', 'for', 'the', 'practical', 'generation', 'of', 'frequencyentangled', 'photonic', 'cluster', 'states']] | [-0.14637556351790917, 0.2619862197487611, -0.023975788244094142, 0.04827489806192266, 0.0020337712855261064, -0.24600758745604864, 0.058014822133738445, 0.4427190650010777, -0.25600813304522363, -0.274047069134034, -0.018430489442903097, -0.2963916657875492, -0.07278053766708369, 0.26344090090873085, 0.026074114278233997, 0.08839250155876904, 0.03701627658349331, -0.08931197047616556, -0.0008288913669726141, -0.14462485821987284, 0.2898145181900184, 0.04865454625290444, 0.3548421889987435, 0.0748839750450766, 0.10395557434237171, 0.05894667934191143, 0.06366671203574706, -0.0845183266683647, -0.048273169258557735, 0.13683654143960242, 0.2978602163493633, 0.0527203358910003, 0.24620269615829826, -0.5266869946896473, -0.20469623371614926, 0.06762416751306748, 0.2151132960908254, 0.23866775035248877, -0.13045845496920852, -0.3448040041480666, -0.03913029533088486, -0.1508116904868109, -0.061860346283206594, -0.11142814348051412, -0.01750517725644233, -0.04566348746754055, -0.2353056169976698, 0.10603113272814864, 0.03940622667264124, -0.004769663665896264, 0.04071672258150076, -0.016976522390565303, 0.02331647664639298, 0.08454419834382623, -0.0673024357888395, -0.003951314776900842, 0.24299382146123674, -0.14601647458256822, -0.2585055889544364, 0.35003830198085406, 0.005676997766751691, -0.1280014994989419, 0.16540915427607633, -0.09659422311396555, -0.1253600298801315, 0.14161928709287405, 0.14321436478471314, 0.1431650057060766, -0.1261659396615665, 0.03174716442122742, 0.050469702857690125, 0.19424660499512314, 0.04498265584861146, 0.27226080493044075, 0.29880480134476706, 0.12916363914122928, 0.041196215932614334, 0.1641641753305742, -0.11484600203634004, -0.13636638054833095, -0.21359150341459524, -0.17737401912432757, -0.24838050042287768, 0.15810872543881707, -0.055932181821777005, -0.14341874771412008, 0.3515162654482176, 0.15728037984754506, 0.09921561668640021, -0.03925384051453705, 0.30831515440874013, 0.10067098425857932, 0.06278026372707823, 0.02595683752132632, 0.26471907033440306, 0.1983856518761577, 0.03919897408651136, -0.26507010826814886, 0.03678342573797313, -0.0686384633762292] |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.