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1,802.0926 | Stimulated scattering instability in a relativistic plasma | We study the stimulated scattering instabilities of an intense linearly
polarized electromagnetic wave (EMW) in a relativistic plasma with degenerate
electrons. Starting from a relativistic hydrodynamic model and the Maxwell's
equations, we derive coupled nonlinear equations for low-frequency electron and
ion plasma oscillations that are driven by the EMW's ponderomotive force. The
nonlinear dispersion relations are then obtained from the coupled nonlinear
equations which reveal stimulated Raman scattering (SRS), stimulated Brillouin
scattering (SBS), and modulational instabilities (MIs) of EMWs. It is shown
that the thermal pressure of ions and the relativistic degenerate pressure of
electrons significantly modify the characteristics of SRS, SBS, and MIs.
| physics.plasm-ph | we study the stimulated scattering instabilities of an intense linearly polarized electromagnetic wave emw in a relativistic plasma with degenerate electrons starting from a relativistic hydrodynamic model and the maxwells equations we derive coupled nonlinear equations for lowfrequency electron and ion plasma oscillations that are driven by the emws ponderomotive force the nonlinear dispersion relations are then obtained from the coupled nonlinear equations which reveal stimulated raman scattering srs stimulated brillouin scattering sbs and modulational instabilities mis of emws it is shown that the thermal pressure of ions and the relativistic degenerate pressure of electrons significantly modify the characteristics of srs sbs and mis | [['we', 'study', 'the', 'stimulated', 'scattering', 'instabilities', 'of', 'an', 'intense', 'linearly', 'polarized', 'electromagnetic', 'wave', 'emw', 'in', 'a', 'relativistic', 'plasma', 'with', 'degenerate', 'electrons', 'starting', 'from', 'a', 'relativistic', 'hydrodynamic', 'model', 'and', 'the', 'maxwells', 'equations', 'we', 'derive', 'coupled', 'nonlinear', 'equations', 'for', 'lowfrequency', 'electron', 'and', 'ion', 'plasma', 'oscillations', 'that', 'are', 'driven', 'by', 'the', 'emws', 'ponderomotive', 'force', 'the', 'nonlinear', 'dispersion', 'relations', 'are', 'then', 'obtained', 'from', 'the', 'coupled', 'nonlinear', 'equations', 'which', 'reveal', 'stimulated', 'raman', 'scattering', 'srs', 'stimulated', 'brillouin', 'scattering', 'sbs', 'and', 'modulational', 'instabilities', 'mis', 'of', 'emws', 'it', 'is', 'shown', 'that', 'the', 'thermal', 'pressure', 'of', 'ions', 'and', 'the', 'relativistic', 'degenerate', 'pressure', 'of', 'electrons', 'significantly', 'modify', 'the', 'characteristics', 'of', 'srs', 'sbs', 'and', 'mis']] | [-0.14043519329705026, 0.26568086663064605, -0.07882380102259609, 0.03698754256318072, -0.05274539335200993, -0.11705452745529608, -0.011394200564469568, 0.33451173677503204, -0.29287037976721947, -0.1902837672835001, -0.029717714576131236, -0.34445225193093604, -0.11955932200026627, 0.22650494172166175, 0.11115979127442607, 0.055518338125414, 0.02156196055539812, -0.08775031528337142, 0.01754439453809307, -0.11942316449935439, 0.329887137206522, 0.09328718868066342, 0.3126624872406515, 0.022958668078689907, 0.10756614447857898, 0.01778956334769296, -0.028561490265509255, -0.0036696135066449642, -0.08556697384707289, 0.021658958347800832, 0.23890410476507476, -0.0607193166081113, 0.24163090318996602, -0.5445288259070367, -0.27033556330626685, -0.05471833741578918, 0.17959232590286633, 0.17102577719085205, -0.10102265586969085, -0.27051740308972794, -0.08126832782111776, -0.12151601682237995, -0.17934902623528615, -0.015398322615790395, -0.004020105581730604, 0.08866186276785672, -0.29694292599854705, 0.11634716182463588, 0.06249424263548393, -0.014243562508804293, -0.12236661958741024, -0.026481410631766684, -0.0783700269754403, -0.043615512137946025, 0.061950260902029604, -0.009629568418649096, 0.15536778343644422, -0.14083182693082982, -0.07250313511870515, 0.40300535161692935, -0.08162356122361067, -0.11337029663487695, 0.17806584054890734, -0.1941073044301727, -0.005714170039237405, 0.2708684790234726, 0.19376792742584187, 0.12486229156358884, -0.16182743393493673, 0.040160763289560024, -0.051474485559643096, 0.12088446589282634, 0.15535616284558693, 0.047045961291027755, 0.17920224650207764, 0.13935765054506752, -0.046464706905401096, 0.08383654274481299, -0.07893274269568232, -0.013254102292613914, -0.25567889257441634, -0.06288512488558459, -0.11530736926943064, 0.08044232867807576, -0.02468082874754775, -0.1464346308144181, 0.3599002086557448, 0.14890705388433373, 0.04574390197208581, -0.07463962408208037, 0.2978125048013261, 0.24996880603990015, 0.003093438836563459, 0.11020589400700723, 0.3623565352396466, 0.2416643465784056, 0.10705005738418549, -0.3760873591661668, -0.07236684458061624, 0.04980721363188842] |
1,802.09261 | HBST: A Hamming Distance embedding Binary Search Tree for Visual Place
Recognition | Reliable and efficient Visual Place Recognition is a major building block of
modern SLAM systems. Leveraging on our prior work, in this paper we present a
Hamming Distance embedding Binary Search Tree (HBST) approach for binary
Descriptor Matching and Image Retrieval. HBST allows for descriptor Search and
Insertion in logarithmic time by exploiting particular properties of binary
Feature descriptors. We support the idea behind our search structure with a
thorough analysis on the exploited descriptor properties and their effects on
completeness and complexity of search and insertion. To validate our claims we
conducted comparative experiments for HBST and several state-of-the-art methods
on a broad range of publicly available datasets. HBST is available as a compact
open-source C++ header-only library.
| cs.RO cs.CV | reliable and efficient visual place recognition is a major building block of modern slam systems leveraging on our prior work in this paper we present a hamming distance embedding binary search tree hbst approach for binary descriptor matching and image retrieval hbst allows for descriptor search and insertion in logarithmic time by exploiting particular properties of binary feature descriptors we support the idea behind our search structure with a thorough analysis on the exploited descriptor properties and their effects on completeness and complexity of search and insertion to validate our claims we conducted comparative experiments for hbst and several stateoftheart methods on a broad range of publicly available datasets hbst is available as a compact opensource c headeronly library | [['reliable', 'and', 'efficient', 'visual', 'place', 'recognition', 'is', 'a', 'major', 'building', 'block', 'of', 'modern', 'slam', 'systems', 'leveraging', 'on', 'our', 'prior', 'work', 'in', 'this', 'paper', 'we', 'present', 'a', 'hamming', 'distance', 'embedding', 'binary', 'search', 'tree', 'hbst', 'approach', 'for', 'binary', 'descriptor', 'matching', 'and', 'image', 'retrieval', 'hbst', 'allows', 'for', 'descriptor', 'search', 'and', 'insertion', 'in', 'logarithmic', 'time', 'by', 'exploiting', 'particular', 'properties', 'of', 'binary', 'feature', 'descriptors', 'we', 'support', 'the', 'idea', 'behind', 'our', 'search', 'structure', 'with', 'a', 'thorough', 'analysis', 'on', 'the', 'exploited', 'descriptor', 'properties', 'and', 'their', 'effects', 'on', 'completeness', 'and', 'complexity', 'of', 'search', 'and', 'insertion', 'to', 'validate', 'our', 'claims', 'we', 'conducted', 'comparative', 'experiments', 'for', 'hbst', 'and', 'several', 'stateoftheart', 'methods', 'on', 'a', 'broad', 'range', 'of', 'publicly', 'available', 'datasets', 'hbst', 'is', 'available', 'as', 'a', 'compact', 'opensource', 'c', 'headeronly', 'library']] | [-0.07617737261672355, -0.06052746441403106, -0.1034991431456967, 0.037171797764765396, -0.10929308428542547, -0.12627434046712055, 0.08950828169614367, 0.4535375974070625, -0.23217319275698617, -0.33372027718094216, 0.13293489945872428, -0.27211431940802777, -0.17268310465356884, 0.20998427689862006, -0.05208480064639775, 0.12376488850866797, 0.15404065056633548, 0.007632555287456563, -0.10583991848104515, -0.25847882673950445, 0.2849937323461279, 0.0953062035753822, 0.29446115181977006, 0.051384258702272124, 0.08579352290928167, 0.03733461267244415, -0.12733442642522522, -0.0233322903826958, -0.11175082670035576, 0.20668021927611166, 0.27819965563777116, 0.23203294998927027, 0.22669555035325847, -0.32386416359608916, -0.20454176916826924, 0.050451556314565556, 0.13603842873595842, 0.09776308660372454, -0.1300664926260835, -0.3291833223686984, 0.10018606187321809, -0.160781451101814, 0.008520937430821047, -0.13171144813580923, 0.0356484451879035, -0.009354039259693202, -0.2520334131281017, 0.003927071432058676, 0.09549602995305753, 0.08779751535254617, -0.06013402059144035, -0.13745612811156305, 0.047028576499320754, 0.1340297495069749, -0.04503843709122108, 0.06952970132951726, 0.12157702159347843, -0.10509072306581593, -0.16176154599485904, 0.39845296314784456, -0.08395117422675386, -0.15419356359028014, 0.25272709533118276, -0.011821221219798346, -0.18951807644593865, 0.07050423754160018, 0.2728541898110709, 0.18225239977209257, -0.16488944320448384, 0.07207137181965571, -0.03575075948376115, 0.22280933317031806, 0.04361919822179157, 0.035089934044204525, 0.2082639624591635, 0.27528921558380814, 0.00819251756183803, 0.16714208060875535, -0.13436663259963402, -0.07930821054805845, -0.22779184872550623, -0.14552437956249262, -0.18867037887880658, -0.06340661880407608, -0.12475286747689433, -0.15845795473506472, 0.3855669160428293, 0.2213396270047216, 0.1688774107510768, 0.08841998448513229, 0.3428963929915628, -0.024801877722488482, 0.11738649164346054, 0.10389598653487422, 0.15225531667482672, 0.04106793641464926, 0.07425675491074554, -0.1725670304305914, 0.08031326129508182, 0.0947332022478804] |
1,802.09262 | tinyLTE: Lightweight, Ad-Hoc Deployable Cellular Network for Vehicular
Communication | The application of LTE technology has evolved from infrastructure-based
deployments in licensed bands to new use cases covering ad hoc,
device-to-device communications and unlicensed band operation. Vehicular
communication is an emerging field of particular interest for LTE, covering in
our understanding both automotive (cars) as well as unmanned aerial vehicles.
Existing commercial equipment is designed for infrastructure making it
unsuitable for vehicular applications requiring low weight and unlicensed band
support (e.g. 5.9 GHz ITS-band). In this work, we present tinyLTE, a system
design which provides fully autonomous, multi-purpose and ultra-compact LTE
cells by utilizing existing open source eNB and EPC implementations. Due to its
small form factor and low weight, the tinyLTE system enables mobile deployment
on board of cars and drones as well as smooth integration with existing
roadside infrastructure. Additionally, the standalone design allows for systems
to be chained in a multi-hop configuration. The paper describes the lean and
low-cost design concept and implementation followed by a performance evaluation
for single and two-hop configurations at 5.9 GHz. The results from both lab and
field experiments validate the feasibility of the tinyLTE approach and
demonstrate its potential to even support real-time vehicular applications
(e.g. with a lowest average end-to-end latency of around 7 ms in the lab
experiment).
| cs.NI | the application of lte technology has evolved from infrastructurebased deployments in licensed bands to new use cases covering ad hoc devicetodevice communications and unlicensed band operation vehicular communication is an emerging field of particular interest for lte covering in our understanding both automotive cars as well as unmanned aerial vehicles existing commercial equipment is designed for infrastructure making it unsuitable for vehicular applications requiring low weight and unlicensed band support eg 59 ghz itsband in this work we present tinylte a system design which provides fully autonomous multipurpose and ultracompact lte cells by utilizing existing open source enb and epc implementations due to its small form factor and low weight the tinylte system enables mobile deployment on board of cars and drones as well as smooth integration with existing roadside infrastructure additionally the standalone design allows for systems to be chained in a multihop configuration the paper describes the lean and lowcost design concept and implementation followed by a performance evaluation for single and twohop configurations at 59 ghz the results from both lab and field experiments validate the feasibility of the tinylte approach and demonstrate its potential to even support realtime vehicular applications eg with a lowest average endtoend latency of around 7 ms in the lab experiment | [['the', 'application', 'of', 'lte', 'technology', 'has', 'evolved', 'from', 'infrastructurebased', 'deployments', 'in', 'licensed', 'bands', 'to', 'new', 'use', 'cases', 'covering', 'ad', 'hoc', 'devicetodevice', 'communications', 'and', 'unlicensed', 'band', 'operation', 'vehicular', 'communication', 'is', 'an', 'emerging', 'field', 'of', 'particular', 'interest', 'for', 'lte', 'covering', 'in', 'our', 'understanding', 'both', 'automotive', 'cars', 'as', 'well', 'as', 'unmanned', 'aerial', 'vehicles', 'existing', 'commercial', 'equipment', 'is', 'designed', 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1,802.09263 | O-Minimal Invariants for Discrete-Time Dynamical Systems | Termination analysis of linear loops plays a key r\^{o}le in several areas of
computer science, including program verification and abstract interpretation.
Already for the simplest variants of linear loops the question of termination
relates to deep open problems in number theory, such as the decidability of the
Skolem and Positivity Problems for linear recurrence sequences, or equivalently
reachability questions for discrete-time linear dynamical systems. In this
paper, we introduce the class of \emph{o-minimal invariants}, which is broader
than any previously considered, and study the decidability of the existence and
algorithmic synthesis of such invariants as certificates of non-termination for
linear loops equipped with a large class of halting conditions. We establish
two main decidability results, one of them conditional on Schanuel's conjecture
in transcendental number theory.
| cs.CC cs.LO math.AG | termination analysis of linear loops plays a key role in several areas of computer science including program verification and abstract interpretation already for the simplest variants of linear loops the question of termination relates to deep open problems in number theory such as the decidability of the skolem and positivity problems for linear recurrence sequences or equivalently reachability questions for discretetime linear dynamical systems in this paper we introduce the class of emphominimal invariants which is broader than any previously considered and study the decidability of the existence and algorithmic synthesis of such invariants as certificates of nontermination for linear loops equipped with a large class of halting conditions we establish two main decidability results one of them conditional on schanuels conjecture in transcendental number theory | [['termination', 'analysis', 'of', 'linear', 'loops', 'plays', 'a', 'key', 'role', 'in', 'several', 'areas', 'of', 'computer', 'science', 'including', 'program', 'verification', 'and', 'abstract', 'interpretation', 'already', 'for', 'the', 'simplest', 'variants', 'of', 'linear', 'loops', 'the', 'question', 'of', 'termination', 'relates', 'to', 'deep', 'open', 'problems', 'in', 'number', 'theory', 'such', 'as', 'the', 'decidability', 'of', 'the', 'skolem', 'and', 'positivity', 'problems', 'for', 'linear', 'recurrence', 'sequences', 'or', 'equivalently', 'reachability', 'questions', 'for', 'discretetime', 'linear', 'dynamical', 'systems', 'in', 'this', 'paper', 'we', 'introduce', 'the', 'class', 'of', 'emphominimal', 'invariants', 'which', 'is', 'broader', 'than', 'any', 'previously', 'considered', 'and', 'study', 'the', 'decidability', 'of', 'the', 'existence', 'and', 'algorithmic', 'synthesis', 'of', 'such', 'invariants', 'as', 'certificates', 'of', 'nontermination', 'for', 'linear', 'loops', 'equipped', 'with', 'a', 'large', 'class', 'of', 'halting', 'conditions', 'we', 'establish', 'two', 'main', 'decidability', 'results', 'one', 'of', 'them', 'conditional', 'on', 'schanuels', 'conjecture', 'in', 'transcendental', 'number', 'theory']] | [-0.1485351129695773, 0.051641645103693005, -0.03539763037487865, 0.13419418244084227, -0.09022956334799528, -0.1561794311674312, 0.032843290350399915, 0.2782387212663889, -0.33377116583287714, -0.31276725717633963, 0.17320399203896522, -0.21028027362935245, -0.14955837797094138, 0.2469395980089903, -0.08959448406845331, 0.13021521474421024, 0.04997657921165228, 0.02080810595303774, -0.05141314758732915, -0.28058001946564765, 0.3517529309280217, -0.036922664681682364, 0.17360753608867527, 0.06858492551278322, 0.0681294598095119, 0.05681361708417535, -0.012379790239036082, 0.03712829456105828, -0.12037064090371132, 0.1345843231379986, 0.32442117837909606, 0.2159189705501194, 0.3303059757761657, -0.42474720934592186, -0.184407530548051, 0.11042692198697478, 0.10707144140638411, 0.10118651058827527, -0.02975148312281817, -0.22695272734761238, 0.09460818292573095, -0.11977279903087765, -0.13430617173202336, -0.04718012799602002, 0.03183550743106753, 0.03073079868964851, -0.2215319076105952, 0.02287020307034254, 0.16454419973376208, 0.1323785959482193, -0.05662831174582243, -0.10353141085803509, 0.012916568789631128, 0.1118257732708007, 0.021579963038675487, -0.022686483236029745, 0.057870529636740685, -0.15607304044626652, -0.22365288285166024, 0.34135999373346565, -0.023667854087078014, -0.1578387153595686, 0.21074222595617176, -0.07118111733347178, -0.2787098095621914, 0.07600629775971174, 0.16841896487772465, 0.13858153500035406, -0.09402823494002223, 0.12697270992957055, -0.12291641115397214, 0.16594143365230413, 0.11620587616413831, 0.07071775156632065, 0.17644761092588304, 0.15562411354109645, 0.08602263144683092, 0.19738395928777755, 0.049279712650692094, -0.12679901694506407, -0.3359542744457722, -0.1791254668161273, -0.07116046474128962, 0.029911980793811382, -0.07501566898310558, -0.22260851315152833, 0.3882143242880702, 0.14008779841288924, 0.1191500457972288, 0.15014367318805308, 0.25071973901987077, 0.1111736808028072, 0.041181541015394035, 0.044954249482601884, 0.13548241633921862, 0.21309149312973022, 0.06622917668148876, -0.20389911498315633, 0.10659045273065568, 0.1688634762428701] |
1,802.09264 | Outgassing on stagnant-lid super-Earths | We explore volcanic outgassing on purely rocky, stagnant-lid exoplanets of
different interior structures, compositions, thermal states, and age. We focus
on planets in the mass range of 1-8 ME (Earth masses). We derive scaling laws
to quantify first- and second-order influences of these parameters on volcanic
outgassing after 4.5 Gyrs of evolution. Given commonly observed astrophysical
data of super-Earths, we identify a range of possible interior structures and
compositions by employing Bayesian inference modelling. [..] The identified
interiors are subsequently used as input for two-dimensional (2-D) convection
models to study partial melting, depletion, and outgassing rates of CO2. In
total, we model depletion and outgassing for an extensive set of more than 2300
different super-Earth cases. We find that there is a mass range for which
outgassing is most efficient (~2--3 ME, depending on thermal state) and an
upper mass where outgassing becomes very inefficient (~5--7 \ME, depending on
thermal state). [..] In summary, depletion and outgassing are mainly influenced
by planet mass and thermal state. Interior structure and composition only
moderately affect outgassing. The majority of outgassing occurs before 4.5
Gyrs, especially for planets below 3 ME. We conclude that for stagnant-lid
planets, (1) compositional and structural properties have secondary influence
on outgassing compared to planet mass and thermal state, and (2) confirm that
there is a mass range for which outgassing is most efficient and an upper mass
limit, above which no significant outgassing can occur. Our predicted trend of
CO2-atmospheric masses can be observationally tested for exoplanets. These
findings and our provided scaling laws are an important step in order to
provide interpretative means for upcoming missions such as, e.g., JWST and
E-ELT, that aim at characterizing exoplanet atmospheres.
| astro-ph.EP | we explore volcanic outgassing on purely rocky stagnantlid exoplanets of different interior structures compositions thermal states and age we focus on planets in the mass range of 18 me earth masses we derive scaling laws to quantify first and secondorder influences of these parameters on volcanic outgassing after 45 gyrs of evolution given commonly observed astrophysical data of superearths we identify a range of possible interior structures and compositions by employing bayesian inference modelling the identified interiors are subsequently used as input for twodimensional 2d convection models to study partial melting depletion and outgassing rates of co2 in total we model depletion and outgassing for an extensive set of more than 2300 different superearth cases we find that there is a mass range for which outgassing is most efficient 23 me depending on thermal state and an upper mass where outgassing becomes very inefficient 57 me depending on thermal state in summary depletion and outgassing are mainly influenced by planet mass and thermal state interior structure and composition only moderately affect outgassing the majority of outgassing occurs before 45 gyrs especially for planets below 3 me we conclude that for stagnantlid planets 1 compositional and structural properties have secondary influence on outgassing compared to planet mass and thermal state and 2 confirm that there is a mass range for which outgassing is most efficient and an upper mass limit above which no significant outgassing can occur our predicted trend of co2atmospheric masses can be observationally tested for exoplanets these findings and our provided scaling laws are an important step in order to provide interpretative means for upcoming missions such as eg jwst and eelt that aim at characterizing exoplanet atmospheres | [['we', 'explore', 'volcanic', 'outgassing', 'on', 'purely', 'rocky', 'stagnantlid', 'exoplanets', 'of', 'different', 'interior', 'structures', 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1,802.09265 | Limited Resources Induce Bistability in Microtubule Length Regulation | The availability of protein is an important factor for the determination of
the size of the mitotic spindle. Involved in spindle-size regulation is
kinesin-8, a molecular motor and microtubule (MT) depolymerase, which is known
to tightly control MT length. Here, we propose and analyze a theoretical model
in which kinesin-induced MT depolymerization competes with spontaneous
polymerization while supplies of both tubulin and kinesin are limited. In
contrast to previous studies where resources were unconstrained, we find that,
for a wide range of concentrations, MT length regulation is bistable. We test
our predictions by conducting in vitro experiments, and find that the bistable
behavior manifests in a bimodal MT length distribution.
| physics.bio-ph q-bio.SC | the availability of protein is an important factor for the determination of the size of the mitotic spindle involved in spindlesize regulation is kinesin8 a molecular motor and microtubule mt depolymerase which is known to tightly control mt length here we propose and analyze a theoretical model in which kinesininduced mt depolymerization competes with spontaneous polymerization while supplies of both tubulin and kinesin are limited in contrast to previous studies where resources were unconstrained we find that for a wide range of concentrations mt length regulation is bistable we test our predictions by conducting in vitro experiments and find that the bistable behavior manifests in a bimodal mt length distribution | [['the', 'availability', 'of', 'protein', 'is', 'an', 'important', 'factor', 'for', 'the', 'determination', 'of', 'the', 'size', 'of', 'the', 'mitotic', 'spindle', 'involved', 'in', 'spindlesize', 'regulation', 'is', 'kinesin8', 'a', 'molecular', 'motor', 'and', 'microtubule', 'mt', 'depolymerase', 'which', 'is', 'known', 'to', 'tightly', 'control', 'mt', 'length', 'here', 'we', 'propose', 'and', 'analyze', 'a', 'theoretical', 'model', 'in', 'which', 'kinesininduced', 'mt', 'depolymerization', 'competes', 'with', 'spontaneous', 'polymerization', 'while', 'supplies', 'of', 'both', 'tubulin', 'and', 'kinesin', 'are', 'limited', 'in', 'contrast', 'to', 'previous', 'studies', 'where', 'resources', 'were', 'unconstrained', 'we', 'find', 'that', 'for', 'a', 'wide', 'range', 'of', 'concentrations', 'mt', 'length', 'regulation', 'is', 'bistable', 'we', 'test', 'our', 'predictions', 'by', 'conducting', 'in', 'vitro', 'experiments', 'and', 'find', 'that', 'the', 'bistable', 'behavior', 'manifests', 'in', 'a', 'bimodal', 'mt', 'length', 'distribution']] | [-0.15896066766510777, 0.19383042487307672, 0.022422402383428866, 0.01970854696543522, -0.027944740534664315, -0.14320338457805393, 0.056939743185050296, 0.4021359353155446, -0.24605592631813245, -0.2733919621384311, 0.04095517236752453, -0.23702375588407654, -0.19844897734175357, 0.2062544855310921, -0.056649429453797986, 0.018780922456252798, 0.0364297205766132, 0.04451941467264545, 0.07112072977002397, -0.15118951975394077, 0.18240194534882903, 0.07699542414292554, 0.32807589375857854, 0.06722392500421712, 0.12579460703619869, -0.0394154260866344, 0.04123608154412272, -0.01237028868538197, -0.184221995248765, 0.13551783455518362, 0.24065226346045454, 0.07739771935636196, 0.26031120619344933, -0.43357183615389827, -0.23563906293532105, 0.05286022335417116, 0.17851675396663286, 0.14062208919481278, -0.029294491358205815, -0.1807523140200701, 0.08596545221092546, -0.10468641166557845, -0.0838660892973889, -0.04996833722020073, 0.025423296473193566, 0.09482159763389642, -0.2961551628954639, 0.12268763060124468, 0.0424549808838866, 0.12104309989992425, -0.08411604345767437, -0.07960311908309704, -0.029913117575990123, 0.17053891734054713, 0.08449062977364792, 0.06134307457060144, 0.25247941076076613, -0.16001112366565198, -0.10641497515890504, 0.3438845001222026, -0.03917371458373964, -0.16977432721825403, 0.19169693438893307, -0.14461739029665696, -0.1515726837738652, 0.10882770033361756, 0.16605386487589105, 0.09017259012021028, -0.18288292804793846, 0.015745195610205008, -0.0639796021142017, 0.2386387062126283, 0.06628394636725919, -0.03399100793072971, 0.17003382679736503, 0.27938694913358053, 0.006250062548320427, 0.15813975748562506, -0.11831177430767044, -0.16868854876363945, -0.23762259691100673, -0.12781945040675802, -0.11811058556499987, 0.038219026794709336, -0.04839436976167277, -0.13530824185462198, 0.3613346774809968, 0.11817747532938407, 0.2190567725990838, 0.10386549892278266, 0.23846682075794054, 0.0300983681145481, 0.12720101545173151, 0.0031167099156599737, 0.21925003094616058, 0.06538436576075608, 0.09759647402124672, -0.3142547447095129, 0.14454316140248258, -0.015327824584304173] |
1,802.09266 | Imaging Electron Dynamics with Ultrashort Light Pulses: A Theory
Perspective | A wide range of ultrafast phenomena in various atomic, molecular and condense
matter systems is governed by electron dynamics. Therefore, the ability to
image electronic motion in real space and real time would provide a deeper
understanding of such processes and guide developments of tools to control
them. Ultrashort light pulses, which can provide unprecedented time resolution
approaching subfemtosecond time scale, are perspective to achieve real-time
imaging of electron dynamics. This task is challenging not only from an
experimental view, but also from a theory perspective, since standard theories
describing light-matter interaction in a stationary regime can provide
erroneous results in an ultrafast case as demonstrated by several theoretical
studies. We review the theoretical framework based on quantum electrodynamics,
which has been shown to be necessary for an accurate description of
time-resolved imaging of electron dynamics with ultrashort light pulses. We
compare the results of theoretical studies of time-resolved nonresonant and
resonant X-ray scattering, and time- and angle-resolved photoelectron
spectroscopy and show that the corresponding time-resolved signals encode
analogous information about electron dynamics. Thereby, the information about
an electronic system provided by these time-resolved techniques is different
from the information provided by their time-independent analogues.
| physics.atom-ph physics.optics quant-ph | a wide range of ultrafast phenomena in various atomic molecular and condense matter systems is governed by electron dynamics therefore the ability to image electronic motion in real space and real time would provide a deeper understanding of such processes and guide developments of tools to control them ultrashort light pulses which can provide unprecedented time resolution approaching subfemtosecond time scale are perspective to achieve realtime imaging of electron dynamics this task is challenging not only from an experimental view but also from a theory perspective since standard theories describing lightmatter interaction in a stationary regime can provide erroneous results in an ultrafast case as demonstrated by several theoretical studies we review the theoretical framework based on quantum electrodynamics which has been shown to be necessary for an accurate description of timeresolved imaging of electron dynamics with ultrashort light pulses we compare the results of theoretical studies of timeresolved nonresonant and resonant xray scattering and time and angleresolved photoelectron spectroscopy and show that the corresponding timeresolved signals encode analogous information about electron dynamics thereby the information about an electronic system provided by these timeresolved techniques is different from the information provided by their timeindependent analogues | [['a', 'wide', 'range', 'of', 'ultrafast', 'phenomena', 'in', 'various', 'atomic', 'molecular', 'and', 'condense', 'matter', 'systems', 'is', 'governed', 'by', 'electron', 'dynamics', 'therefore', 'the', 'ability', 'to', 'image', 'electronic', 'motion', 'in', 'real', 'space', 'and', 'real', 'time', 'would', 'provide', 'a', 'deeper', 'understanding', 'of', 'such', 'processes', 'and', 'guide', 'developments', 'of', 'tools', 'to', 'control', 'them', 'ultrashort', 'light', 'pulses', 'which', 'can', 'provide', 'unprecedented', 'time', 'resolution', 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1,802.09267 | Beam Dynamics and Tolerance Studies of the THz-driven Electron Linac for
the AXSIS Experiment | A dielectric-loaded linac powered by THz-pulses is one of the key parts of
the "Attosecond X-ray Science: Imaging and Spectroscopy" (AXSIS) project at
DESY, Hamburg. As in conventional accelerators, the AXSIS linac is designed to
have phase velocity equal to the speed of light which, in this case, is
realized by tuning the thickness of the dielectric layer and the radius of the
vacuum channel. Therefore, structure fabrication errors will lead to a change
in the beam dynamics and beam quality. Additionally, errors in the bunch
injection will also affect the acceleration process and can cause beam loss on
the linac wall. This paper numerically investigates the process of electron
beam acceleration in the AXSIS linac, taking into account the aforementioned
errors. Particle tracking simulations were done using the code ECHO, which uses
a low-dispersive algorithm for the field calculation and was specially adapted
for the dielectric-loaded accelerating structures.
| physics.acc-ph | a dielectricloaded linac powered by thzpulses is one of the key parts of the attosecond xray science imaging and spectroscopy axsis project at desy hamburg as in conventional accelerators the axsis linac is designed to have phase velocity equal to the speed of light which in this case is realized by tuning the thickness of the dielectric layer and the radius of the vacuum channel therefore structure fabrication errors will lead to a change in the beam dynamics and beam quality additionally errors in the bunch injection will also affect the acceleration process and can cause beam loss on the linac wall this paper numerically investigates the process of electron beam acceleration in the axsis linac taking into account the aforementioned errors particle tracking simulations were done using the code echo which uses a lowdispersive algorithm for the field calculation and was specially adapted for the dielectricloaded accelerating structures | [['a', 'dielectricloaded', 'linac', 'powered', 'by', 'thzpulses', 'is', 'one', 'of', 'the', 'key', 'parts', 'of', 'the', 'attosecond', 'xray', 'science', 'imaging', 'and', 'spectroscopy', 'axsis', 'project', 'at', 'desy', 'hamburg', 'as', 'in', 'conventional', 'accelerators', 'the', 'axsis', 'linac', 'is', 'designed', 'to', 'have', 'phase', 'velocity', 'equal', 'to', 'the', 'speed', 'of', 'light', 'which', 'in', 'this', 'case', 'is', 'realized', 'by', 'tuning', 'the', 'thickness', 'of', 'the', 'dielectric', 'layer', 'and', 'the', 'radius', 'of', 'the', 'vacuum', 'channel', 'therefore', 'structure', 'fabrication', 'errors', 'will', 'lead', 'to', 'a', 'change', 'in', 'the', 'beam', 'dynamics', 'and', 'beam', 'quality', 'additionally', 'errors', 'in', 'the', 'bunch', 'injection', 'will', 'also', 'affect', 'the', 'acceleration', 'process', 'and', 'can', 'cause', 'beam', 'loss', 'on', 'the', 'linac', 'wall', 'this', 'paper', 'numerically', 'investigates', 'the', 'process', 'of', 'electron', 'beam', 'acceleration', 'in', 'the', 'axsis', 'linac', 'taking', 'into', 'account', 'the', 'aforementioned', 'errors', 'particle', 'tracking', 'simulations', 'were', 'done', 'using', 'the', 'code', 'echo', 'which', 'uses', 'a', 'lowdispersive', 'algorithm', 'for', 'the', 'field', 'calculation', 'and', 'was', 'specially', 'adapted', 'for', 'the', 'dielectricloaded', 'accelerating', 'structures']] | [-0.09717390558688675, 0.16473229829146452, -0.09431561751124398, 0.03255655099744488, -0.01698150842865879, -0.13515406773375296, -0.014417297207605647, 0.4369267223503541, -0.25150876363339786, -0.3142194719230001, 0.0883481138680017, -0.23163084465557257, -0.007456836404319777, 0.2518538853690041, -0.04591358055335444, 0.09240352476567873, 0.07623164963769267, -0.05625572806142422, -0.031351243359716355, -0.1926071108979601, 0.28493448149261846, 0.18217087744710012, 0.31842251455512, 0.06494391829757071, 0.1246995648866318, 0.018711691586980345, 0.015222130242634463, -0.052005826341416185, -0.07903575743674426, 0.07634583225700299, 0.20463311701314524, 0.09464380372554769, 0.2480404313946319, -0.45677750516129106, -0.22068287878347612, 0.02785182691091118, 0.1594568424719713, 0.08878211093896597, -0.07723856298646235, -0.2454064195508427, 0.042798864894320034, -0.1610283529436266, -0.14663587326995675, 0.02200765480803376, -0.06816137260269702, 0.05603300033112031, -0.24842420638093687, 0.000365454212540597, 0.027487865787603566, 0.02503045037313289, -0.039089363562320734, -0.08780243034738847, 0.05105354845511249, 0.0671300234885043, 0.011604700558048018, 0.07680474906354337, 0.18705588588459618, -0.10315181487365752, -0.08684588189715066, 0.372313132559931, -0.009989531377229738, -0.1269775700654734, 0.09433593893324566, -0.17768142025011616, -0.008219940647659069, 0.17026763830359118, 0.22531680498527626, 0.07456902767267279, -0.14193376000204463, 0.041443555675229886, 0.06836444380885065, 0.18233282111877752, 0.12796153845517216, 0.00683671174212233, 0.19535201843324546, 0.20766076011421172, 0.014495629989117308, 0.14546250213390668, -0.178044240888699, -0.010978273971862084, -0.30268161761498935, -0.15173287599070653, -0.14472526413344503, 0.010314197442386177, 0.021211577929116664, -0.1121906566534292, 0.4479718925603929, 0.13549538648599205, 0.10745799560036913, -0.06983127096523153, 0.36706831786353644, 0.07637090016096654, 0.093908679526853, 0.04005432848793429, 0.2884071350657708, 0.11432086686584847, 0.15447817125508712, -0.2723701388568844, 0.06149544400741925, 0.030069452049714084] |
1,802.09268 | Relationships between K-monotonicity and rotundity properties with
application | In this paper we investigate a relationship between fully k-rotundity
properties, uniform K-monotonicity properties, reflexivity and K-order
continuity in a symmetric spaces E. We also answer a crucial question whether
fully k-rotundity properties might be restricted in definition to E^d the
positive cone of all nonnegative and decreasing elements of E. We present a
complete characterization of decreasing uniform K-monotonicity and K-order
continuity in E. It is worth mentioning that we also establish several
auxiliary results describing reflexivity in Lorentz spaces and K-order
continuity in Orlicz spaces. Finally, we show an application of discussed
geometric properties to the approximation theory.
| math.FA | in this paper we investigate a relationship between fully krotundity properties uniform kmonotonicity properties reflexivity and korder continuity in a symmetric spaces e we also answer a crucial question whether fully krotundity properties might be restricted in definition to ed the positive cone of all nonnegative and decreasing elements of e we present a complete characterization of decreasing uniform kmonotonicity and korder continuity in e it is worth mentioning that we also establish several auxiliary results describing reflexivity in lorentz spaces and korder continuity in orlicz spaces finally we show an application of discussed geometric properties to the approximation theory | [['in', 'this', 'paper', 'we', 'investigate', 'a', 'relationship', 'between', 'fully', 'krotundity', 'properties', 'uniform', 'kmonotonicity', 'properties', 'reflexivity', 'and', 'korder', 'continuity', 'in', 'a', 'symmetric', 'spaces', 'e', 'we', 'also', 'answer', 'a', 'crucial', 'question', 'whether', 'fully', 'krotundity', 'properties', 'might', 'be', 'restricted', 'in', 'definition', 'to', 'ed', 'the', 'positive', 'cone', 'of', 'all', 'nonnegative', 'and', 'decreasing', 'elements', 'of', 'e', 'we', 'present', 'a', 'complete', 'characterization', 'of', 'decreasing', 'uniform', 'kmonotonicity', 'and', 'korder', 'continuity', 'in', 'e', 'it', 'is', 'worth', 'mentioning', 'that', 'we', 'also', 'establish', 'several', 'auxiliary', 'results', 'describing', 'reflexivity', 'in', 'lorentz', 'spaces', 'and', 'korder', 'continuity', 'in', 'orlicz', 'spaces', 'finally', 'we', 'show', 'an', 'application', 'of', 'discussed', 'geometric', 'properties', 'to', 'the', 'approximation', 'theory']] | [-0.13136640594806523, 0.09671362638255232, -0.09598363312426955, 0.13007375030778348, -0.09831677529029548, -0.07479684273712336, 0.04567000590497628, 0.4172932494059205, -0.3358552889805287, -0.19428120359312742, 0.0883073648600839, -0.26297768254764375, -0.17180591573938728, 0.13086556730791926, -0.13392692629480735, 0.021736544573213903, 0.002684469654923305, 0.023694022987037898, -0.1516069697146304, -0.26826819906709715, 0.35942428529728204, -0.0007206153543666005, 0.24407227986492216, 0.1070996662566904, 0.08420480661094189, 0.04465654326115327, -0.04748733000829816, 0.06628141564317047, -0.22324844944560027, 0.13237942019244656, 0.20585097961127757, 0.1354454025067389, 0.28667595390230416, -0.36304557634110096, -0.14363943507894875, 0.15886623052414506, 0.0777736806467874, -0.033954317055176944, -0.0612921764049679, -0.2538009460922331, 0.11209663748275489, -0.13796604712493718, -0.1757635307032615, -0.13104622419923545, 0.07445586904883385, 0.04029448508284986, -0.2729511133074993, 0.051140409674844706, 0.1620428346050903, 0.07491701440158068, -0.14526727765332909, -0.06139992166077718, -0.013720622453838587, 0.08176596946083009, -0.0010058837799533649, 0.015830616819439456, 0.026948398989625276, -0.09350422062678262, -0.10138440793845803, 0.34011457198299466, -0.0655014167848276, -0.2580779781378806, 0.15515249877469614, -0.1717937058582902, -0.17120514185167848, 0.014232539730146527, 0.13704157788306476, 0.13214487586170434, -0.13507867524400352, 0.15186828516656534, -0.09583474829240003, 0.120025755421957, 0.09689361413940788, 0.08787025721278041, 0.1208918225072557, 0.11146801138296723, 0.1390935707092285, 0.16132200194639154, 0.06144969700369984, -0.04571589314437006, -0.3632311450317502, -0.2000454643089324, -0.13513849431765265, 0.09929742361418903, -0.0783707671466982, -0.1614311853609979, 0.34236090000369584, 0.12156449900940061, 0.18562214194098486, 0.06450168806826696, 0.20544755198061465, 0.07121963578276336, -0.03745065985247493, 0.0761215490847826, 0.19289388850331307, 0.22985017416998743, 0.0714287516940385, -0.14238674712833016, 0.05372920983005315, 0.15033575544599442] |
1,802.09269 | Wealth Inequality and the Price of Anarchy | Price of anarchy quantifies the degradation of social welfare in games due to
the lack of a centralized authority that can enforce the optimal outcome. At
its antipodes, mechanism design studies how to ameliorate these effects by
incentivizing socially desirable behavior and implementing the optimal state as
equilibrium. In practice, the responsiveness to such measures depends on the
wealth of each individual. This leads to a natural, but largely unexplored,
question. Does optimal mechanism design entrench, or maybe even exacerbate,
social inequality?
We study this question in nonatomic congestion games, arguably one of the
most thoroughly studied settings from the perspectives of price of anarchy as
well as mechanism design. We introduce a new model that incorporates the wealth
distribution of the population and captures the income elasticity of travel
time. This allows us to argue about the equality of wealth distribution both
before and after employing a mechanism. We start our analysis by establishing a
broad qualitative result, showing that tolls always increase inequality in
symmetric congestion games under any reasonable metric of inequality, e.g., the
Gini index. Next, we introduce the iniquity index, a novel measure for
quantifying the magnitude of these forces towards a more unbalanced wealth
distribution and show it has good normative properties (robustness to scaling
of income, no-regret learning). We analyze iniquity both in theoretical
settings (Pigou's network under various wealth distributions) as well as
experimental ones (based on a large scale field experiment in Singapore).
Finally, we provide an algorithm for computing optimal tolls for any point of
the trade-off of relative importance of efficiency and equality. We conclude
with a discussion of our findings in the context of theories of justice as
developed in contemporary social sciences.
| cs.GT | price of anarchy quantifies the degradation of social welfare in games due to the lack of a centralized authority that can enforce the optimal outcome at its antipodes mechanism design studies how to ameliorate these effects by incentivizing socially desirable behavior and implementing the optimal state as equilibrium in practice the responsiveness to such measures depends on the wealth of each individual this leads to a natural but largely unexplored question does optimal mechanism design entrench or maybe even exacerbate social inequality we study this question in nonatomic congestion games arguably one of the most thoroughly studied settings from the perspectives of price of anarchy as well as mechanism design we introduce a new model that incorporates the wealth distribution of the population and captures the income elasticity of travel time this allows us to argue about the equality of wealth distribution both before and after employing a mechanism we start our analysis by establishing a broad qualitative result showing that tolls always increase inequality in symmetric congestion games under any reasonable metric of inequality eg the gini index next we introduce the iniquity index a novel measure for quantifying the magnitude of these forces towards a more unbalanced wealth distribution and show it has good normative properties robustness to scaling of income noregret learning we analyze iniquity both in theoretical settings pigous network under various wealth distributions as well as experimental ones based on a large scale field experiment in singapore finally we provide an algorithm for computing optimal tolls for any point of the tradeoff of relative importance of efficiency and equality we conclude with a discussion of our findings in the context of theories of justice as developed in contemporary social sciences | [['price', 'of', 'anarchy', 'quantifies', 'the', 'degradation', 'of', 'social', 'welfare', 'in', 'games', 'due', 'to', 'the', 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1,802.0927 | Mass measurable phase differences in neutrino oscillations | We propose an ansatz, named the "particle ansatz", that in the rest frame of
a flavor neutrino all its mass eigenstate momentums should simultaneously be
zero. Under the particle ansatz, the mass measurable phase differences (mmPhDs)
can be derived as $\Delta\phi_{ji}\simeq [2m_{\nu_\alpha}(m_j-m_i)/4
E_{\nu_\alpha}]L$. We show that using mmPhDs all three neutrino masses can be
determined. In the foreseeable future all neutrino masses are expected to be
determined by the spectral analysis of neutrino experiments.
| hep-ph astro-ph.CO | we propose an ansatz named the particle ansatz that in the rest frame of a flavor neutrino all its mass eigenstate momentums should simultaneously be zero under the particle ansatz the mass measurable phase differences mmphds can be derived as deltaphi_jisimeq 2m_nu_alpham_jm_i4 e_nu_alphal we show that using mmphds all three neutrino masses can be determined in the foreseeable future all neutrino masses are expected to be determined by the spectral analysis of neutrino experiments | [['we', 'propose', 'an', 'ansatz', 'named', 'the', 'particle', 'ansatz', 'that', 'in', 'the', 'rest', 'frame', 'of', 'a', 'flavor', 'neutrino', 'all', 'its', 'mass', 'eigenstate', 'momentums', 'should', 'simultaneously', 'be', 'zero', 'under', 'the', 'particle', 'ansatz', 'the', 'mass', 'measurable', 'phase', 'differences', 'mmphds', 'can', 'be', 'derived', 'as', 'deltaphi_jisimeq', '2m_nu_alpham_jm_i4', 'e_nu_alphal', 'we', 'show', 'that', 'using', 'mmphds', 'all', 'three', 'neutrino', 'masses', 'can', 'be', 'determined', 'in', 'the', 'foreseeable', 'future', 'all', 'neutrino', 'masses', 'are', 'expected', 'to', 'be', 'determined', 'by', 'the', 'spectral', 'analysis', 'of', 'neutrino', 'experiments']] | [-0.10594113221041103, 0.2823865777777889, -0.0663157889131875, 0.15821332488532946, -0.039968231456705194, -0.11514625289355931, -0.0008271868354168491, 0.3839110709402872, -0.2216235397896473, -0.286616829811069, 0.08435045768155892, -0.24815736408682837, -0.030305447137874107, 0.1880844067680933, 0.04871008973028781, 0.03583201896854798, 0.08673913401983463, 0.037394232791511044, -0.15794166201131715, -0.21506954262546008, 0.3256743085314182, 0.07199667151207509, 0.22143704167810146, 0.07116571155315994, 0.08441583396347267, -0.06254388757751904, -0.021148685973299587, 0.00402419194849073, -0.09087367912655717, 0.01630389405603426, 0.21777176116998104, 0.1914018297136046, 0.11727775291470555, -0.35331958418954973, -0.17479535705153493, 0.19564538670406825, 0.18142391476051314, 0.10466544338218543, -0.031095450717038002, -0.31143897775884555, 0.0800601287864729, -0.22928800393550564, -0.18540119153676907, -0.10058919762841602, -0.09037737999840276, -0.0027100617754394593, -0.2732942071405874, 0.07744000518046644, -0.04842317499814258, -0.06370676767782889, -0.08168332860636376, -0.165097797282742, -0.04094519738809786, 0.1181042932473339, 0.13366624600915372, -0.03307574040566882, 0.14061929506884105, -0.08123214474028867, -0.09690307950654971, 0.4486066499131097, -0.10284424628522518, -0.21391607251649292, 0.08571591366932768, -0.18058615953297072, -0.09966489427007627, 0.09433788212313168, 0.12451678575219019, 0.078383376173999, -0.2645647436704325, 0.0832473327257279, -0.11813155436159475, 0.1657512680478934, 0.0669556841072019, 0.030422552353769974, 0.3264536978541941, 0.14508575503376947, 0.05906186934452558, -0.02053826714973843, -0.12581702387905208, -0.021415528956044844, -0.3429131782141285, -0.11685477725594588, -0.19658050212867395, 0.07550946917499592, -0.08230440423189514, -0.06687108501522006, 0.4122379985300527, 0.16941589462584344, 0.22665149045001337, 0.033760336733868586, 0.2566527782035047, 0.1617708291058712, 0.07631280708491155, 0.05777563420596762, 0.3167000164048395, 0.0874422208196821, 0.06717925684769517, -0.28457327292341256, -0.0010596295224799626, 0.09810875542461872] |
1,802.09271 | A Low-latency Pipeline for GRB Light Curve and Spectrum using Fermi/GBM
Near Real-time Data | Rapid response and short time latency are very important for Time Domain
Astronomy, such as the observations of Gamma-ray Bursts (GRBs) and
electromagnetic (EM) counterparts of gravitational waves (GWs). Based on the
near real-time Fermi/GBM data, we developed a low-latency pipeline to
automatically calculate the temporal and spectral properties of GRBs. With this
pipeline, some important parameters can be obtained, such as T90 and fluence,
within ~20 minutes after the GRB trigger. For ~90% GRBs, T90 and fluence are
consistent with the GBM catalog results within 2 sigma errors. This pipeline
has been used by the Gamma-ray Bursts Polarimeter (POLAR) and the Insight Hard
X-ray Modulation Telescope (Insight-HXMT) to follow up the bursts of interest.
For GRB 170817A, the first EM counterpart of GW events detected by Fermi/GBM
and INTEGRAL/SPI-ACS, the pipeline gave T90 and spectral information in 21
minutes after the GBM trigger, providing important information for POLAR and
Insight-HXMT observations.
| astro-ph.IM astro-ph.HE | rapid response and short time latency are very important for time domain astronomy such as the observations of gammaray bursts grbs and electromagnetic em counterparts of gravitational waves gws based on the near realtime fermigbm data we developed a lowlatency pipeline to automatically calculate the temporal and spectral properties of grbs with this pipeline some important parameters can be obtained such as t90 and fluence within 20 minutes after the grb trigger for 90 grbs t90 and fluence are consistent with the gbm catalog results within 2 sigma errors this pipeline has been used by the gammaray bursts polarimeter polar and the insight hard xray modulation telescope insighthxmt to follow up the bursts of interest for grb 170817a the first em counterpart of gw events detected by fermigbm and integralspiacs the pipeline gave t90 and spectral information in 21 minutes after the gbm trigger providing important information for polar and insighthxmt observations | [['rapid', 'response', 'and', 'short', 'time', 'latency', 'are', 'very', 'important', 'for', 'time', 'domain', 'astronomy', 'such', 'as', 'the', 'observations', 'of', 'gammaray', 'bursts', 'grbs', 'and', 'electromagnetic', 'em', 'counterparts', 'of', 'gravitational', 'waves', 'gws', 'based', 'on', 'the', 'near', 'realtime', 'fermigbm', 'data', 'we', 'developed', 'a', 'lowlatency', 'pipeline', 'to', 'automatically', 'calculate', 'the', 'temporal', 'and', 'spectral', 'properties', 'of', 'grbs', 'with', 'this', 'pipeline', 'some', 'important', 'parameters', 'can', 'be', 'obtained', 'such', 'as', 't90', 'and', 'fluence', 'within', '20', 'minutes', 'after', 'the', 'grb', 'trigger', 'for', '90', 'grbs', 't90', 'and', 'fluence', 'are', 'consistent', 'with', 'the', 'gbm', 'catalog', 'results', 'within', '2', 'sigma', 'errors', 'this', 'pipeline', 'has', 'been', 'used', 'by', 'the', 'gammaray', 'bursts', 'polarimeter', 'polar', 'and', 'the', 'insight', 'hard', 'xray', 'modulation', 'telescope', 'insighthxmt', 'to', 'follow', 'up', 'the', 'bursts', 'of', 'interest', 'for', 'grb', '170817a', 'the', 'first', 'em', 'counterpart', 'of', 'gw', 'events', 'detected', 'by', 'fermigbm', 'and', 'integralspiacs', 'the', 'pipeline', 'gave', 't90', 'and', 'spectral', 'information', 'in', '21', 'minutes', 'after', 'the', 'gbm', 'trigger', 'providing', 'important', 'information', 'for', 'polar', 'and', 'insighthxmt', 'observations']] | [-0.07183692563946048, 0.1439111699194958, -0.0400999290527155, 0.19804084626181673, -0.14449279033268492, -0.0992615121199439, 0.07661050078769525, 0.4850954783832033, -0.16427451414677005, -0.3685691213731964, 0.10353885475468512, -0.31542577241857844, -0.05826331103841464, 0.29838193306699395, 0.0031933768869688113, 0.07439473426279922, 0.12868157376224795, -0.050513040387692554, -0.06438665300864765, -0.22452322163929542, 0.16934977002131443, 0.20063039022187393, 0.19406912762477682, -0.04179454876109958, 0.11878442842590933, 0.01707228831015527, -0.11004138963917891, -0.07338258005678654, -0.10885258426268896, 0.006242963761712114, 0.29822056982821477, 0.1800750034923355, 0.18295313052522638, -0.41598192115624744, -0.2617697439963619, 0.06853157938147585, 0.09174778222572058, -0.018472813048089544, -0.017279888954944908, -0.371641918544968, 0.05179063841079672, -0.195202481924595, -0.1159721412571768, 0.0216590572334826, 0.0804997135141942, 0.11148979212467869, -0.16018459142030528, 0.09036691573138038, 0.022158308198365072, 0.027907906241404514, -0.10432455485686659, 0.0193801180118074, 0.051765111278897775, 0.07226638674425583, 0.07492672218824736, 0.11981170904046545, 0.09920825649363299, -0.10140094831896325, -0.1174306738213636, 0.3858392666031917, -0.051551399580202995, 0.045607794001698496, 0.12792570335324854, -0.15013129236487052, -0.20928523220742742, 0.24779750793861846, 0.15624426855395238, 0.06035960554378107, -0.19902923015877605, -0.014778384551173076, 0.1101099296938628, 0.23974172102908292, 0.06449616148757438, 0.11031314240458111, 0.2518169189679126, 0.16311690393912917, -0.0035746281407773497, 0.09968159740247454, -0.2944248695873345, 0.0701586635162433, -0.3047430764045566, -0.08313735684069494, -0.14170579870852332, 0.09408854797482491, -0.09347240873903502, -0.112503058447813, 0.46969892030271393, 0.11612845597323031, 0.13721316918109855, 0.08084184498215716, 0.26548308273156485, 0.07230378477135674, 0.06267822929968436, 0.11829503755706051, 0.3221420574291066, 0.061028993604704734, 0.14100838380865752, -0.13938973896205425, 0.09391556794755161, 0.02279776783582444] |
1,802.09272 | Persistent homology analysis of ion aggregation and hydrogen-bonding
network | Despite the great advancement of experimental tools and theoretical models, a
quantitative characterization of the microscopic structures of ion aggregates
and its associated water hydrogen-bonding networks still remains a challenging
problem. In this paper, a newly-invented mathematical method called persistent
homology is introduced, for the first time, to quantitatively analyze the
intrinsic topological properties of ion aggregation systems and
hydrogen-bonding networks. Two most distinguishable properties of persistent
homology analysis of assembly systems are as follows. First, it does not
require a predefined bond length to construct the ion or hydrogen network.
Persistent homology results are determined by the morphological structure of
the data only. Second, it can directly measure the size of circles or holes in
ion aggregates and hydrogen-bonding networks. To validate our model, we
consider two well-studied systems, i.e., NaCl and KSCN solutions, generated
from molecular dynamics simulations. They are believed to represent two
morphological types of aggregation, i.e., local clusters and extended ion
network. It has been found that the two aggregation types have distinguishable
topological features and can be characterized by our topological model very
well. For hydrogen-bonding networks, KSCN systems demonstrate much more
dramatic variations in their local circle structures with the concentration
increase. A consistent increase of large-sized local circle structures is
observed and the sizes of these circles become more and more diverse. In
contrast, NaCl systems show no obvious increase of large-sized circles. Instead
a consistent decline of the average size of circle structures is observed and
the sizes of these circles become more and more uniformed with the
concentration increase.
| q-bio.QM q-bio.BM | despite the great advancement of experimental tools and theoretical models a quantitative characterization of the microscopic structures of ion aggregates and its associated water hydrogenbonding networks still remains a challenging problem in this paper a newlyinvented mathematical method called persistent homology is introduced for the first time to quantitatively analyze the intrinsic topological properties of ion aggregation systems and hydrogenbonding networks two most distinguishable properties of persistent homology analysis of assembly systems are as follows first it does not require a predefined bond length to construct the ion or hydrogen network persistent homology results are determined by the morphological structure of the data only second it can directly measure the size of circles or holes in ion aggregates and hydrogenbonding networks to validate our model we consider two wellstudied systems ie nacl and kscn solutions generated from molecular dynamics simulations they are believed to represent two morphological types of aggregation ie local clusters and extended ion network it has been found that the two aggregation types have distinguishable topological features and can be characterized by our topological model very well for hydrogenbonding networks kscn systems demonstrate much more dramatic variations in their local circle structures with the concentration increase a consistent increase of largesized local circle structures is observed and the sizes of these circles become more and more diverse in contrast nacl systems show no obvious increase of largesized circles instead a consistent decline of the average size of circle structures is observed and the sizes of these circles become more and more uniformed with the concentration increase | [['despite', 'the', 'great', 'advancement', 'of', 'experimental', 'tools', 'and', 'theoretical', 'models', 'a', 'quantitative', 'characterization', 'of', 'the', 'microscopic', 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1,802.09273 | Vector Magnetometry Exploiting Phase-Geometry Effects in a
Double-Resonance Alignment Magnetometer | Double-resonance optically pumped magnetometers are an attractive instrument
for unshielded magnetic field measurements due to their wide dynamic range and
high sensitivity. Use of linearly polarised pump light creates alignment in the
atomic sample, which evolves in the local static magnetic field, and is driven
by a resonant applied field perturbation, modulating the polarisation of
transmitted light. We show for the first time that the amplitude and phase of
observed first- and second-harmonic components in the transmitted polarisation
signal contain sufficient information to measure static magnetic field
magnitude and orientation. We describe a laboratory system for experimental
measurements of these effects and verify a theoretical derivation of the
observed signal. We demonstrate vector field tracking under varying static
field orientations and show that the static field magnitude and orientation may
be observed simultaneously, with experimentally realised resolution of 1.7 pT
and 0.63 mrad in the most sensitive field orientation.
| physics.atom-ph physics.app-ph physics.ins-det | doubleresonance optically pumped magnetometers are an attractive instrument for unshielded magnetic field measurements due to their wide dynamic range and high sensitivity use of linearly polarised pump light creates alignment in the atomic sample which evolves in the local static magnetic field and is driven by a resonant applied field perturbation modulating the polarisation of transmitted light we show for the first time that the amplitude and phase of observed first and secondharmonic components in the transmitted polarisation signal contain sufficient information to measure static magnetic field magnitude and orientation we describe a laboratory system for experimental measurements of these effects and verify a theoretical derivation of the observed signal we demonstrate vector field tracking under varying static field orientations and show that the static field magnitude and orientation may be observed simultaneously with experimentally realised resolution of 17 pt and 063 mrad in the most sensitive field orientation | [['doubleresonance', 'optically', 'pumped', 'magnetometers', 'are', 'an', 'attractive', 'instrument', 'for', 'unshielded', 'magnetic', 'field', 'measurements', 'due', 'to', 'their', 'wide', 'dynamic', 'range', 'and', 'high', 'sensitivity', 'use', 'of', 'linearly', 'polarised', 'pump', 'light', 'creates', 'alignment', 'in', 'the', 'atomic', 'sample', 'which', 'evolves', 'in', 'the', 'local', 'static', 'magnetic', 'field', 'and', 'is', 'driven', 'by', 'a', 'resonant', 'applied', 'field', 'perturbation', 'modulating', 'the', 'polarisation', 'of', 'transmitted', 'light', 'we', 'show', 'for', 'the', 'first', 'time', 'that', 'the', 'amplitude', 'and', 'phase', 'of', 'observed', 'first', 'and', 'secondharmonic', 'components', 'in', 'the', 'transmitted', 'polarisation', 'signal', 'contain', 'sufficient', 'information', 'to', 'measure', 'static', 'magnetic', 'field', 'magnitude', 'and', 'orientation', 'we', 'describe', 'a', 'laboratory', 'system', 'for', 'experimental', 'measurements', 'of', 'these', 'effects', 'and', 'verify', 'a', 'theoretical', 'derivation', 'of', 'the', 'observed', 'signal', 'we', 'demonstrate', 'vector', 'field', 'tracking', 'under', 'varying', 'static', 'field', 'orientations', 'and', 'show', 'that', 'the', 'static', 'field', 'magnitude', 'and', 'orientation', 'may', 'be', 'observed', 'simultaneously', 'with', 'experimentally', 'realised', 'resolution', 'of', '17', 'pt', 'and', '063', 'mrad', 'in', 'the', 'most', 'sensitive', 'field', 'orientation']] | [-0.1689500249515994, 0.196061374323584, -0.02981424930461701, 0.009080944736738183, -0.04521842603102926, -0.11300807164344412, -0.009787594064313843, 0.4576434718832474, -0.25928513247335344, -0.35201157473540245, 0.06522793839404346, -0.23789797424832546, -0.07651588431365738, 0.20431152711803682, 0.023493379404480826, 0.01705627692566447, -0.020084022100539816, 0.00899960680539726, -0.011344794605877376, -0.1722951945348724, 0.2560978877290164, 0.038783252633007984, 0.33164217845605526, 0.03635229177627675, 0.1268390824154157, 0.052003681739392196, -0.022879871581962346, 0.05581751575434874, -0.08402266918149098, 0.040944840609027235, 0.21019722167527516, 0.044691624349583216, 0.15592109843238489, -0.42783099707291616, -0.17616220213271264, 0.0793415815038169, 0.11334449240012757, 0.12887474671459362, -0.09324659419796061, -0.29383715489041684, 0.057045069710670304, -0.07902934663810286, -0.1424315837586936, -0.0919766887005156, 0.022046762302942925, 0.04278713103458785, -0.3003742855617264, 0.053012582629719036, 0.011703927907467689, 0.12449133021744506, -0.11577028971346683, -0.06418823662929662, -0.025842380480240755, 0.07895324006989199, 0.02195620321943706, 0.10265943499152305, 0.20774987299657807, -0.14535437735585158, -0.09289637956168227, 0.3322335819396559, -0.124889894310485, -0.12895448774805654, 0.1322912133155053, -0.23310566768862756, -0.043688361917391116, 0.17081686203999308, 0.2012054411969429, 0.12456627862040429, -0.1177899828336933, 0.019058093793874593, 0.029344337501706893, 0.24022732359113408, 0.0781957101367489, 0.07597193197228465, 0.24952604414757668, 0.13159164071009627, 0.04359643908869749, 0.14368750642275674, -0.179044516569616, -0.04124643020769394, -0.2539291853966479, -0.10267318633928794, -0.15339895352039912, 0.0355117651540161, -0.09109715790081153, -0.11989696092505926, 0.4248301697294884, 0.2087425165442475, 0.16108232146854068, -0.043092967439974164, 0.34586790014892793, 0.12137129313692188, 0.06361690067901782, 0.019445246088649802, 0.34432888464320877, 0.20322197657734806, 0.1151163092565929, -0.2458833704715057, 0.03374108904347624, -0.0888040263890195] |
1,802.09274 | Laser frequency stabilization using a commercial wavelength meter | We present the characterization of a laser frequency stabilization scheme
using a state-of-the-art wavelength meter based on solid Fizeau
interferometers. For a frequency-doubled Ti-sapphire laser operated at 461 nm,
an absolute Allan deviation below $10^{-9}$ with a standard deviation of $1$
MHz over 10\,h is achieved. Using this laser for cooling and trapping of
strontium atoms, the wavemeter scheme provides excellent stability in
single-channel operation. Multi-channel operation with a multimode fiber switch
results in fluctuations of the atomic fluorescence correlated to residual
frequency excursions of the laser. The wavemeter-based frequency stabilization
scheme can be applied to a wide range of atoms and molecules for laser
spectroscopy, cooling and trapping.
| physics.ins-det | we present the characterization of a laser frequency stabilization scheme using a stateoftheart wavelength meter based on solid fizeau interferometers for a frequencydoubled tisapphire laser operated at 461 nm an absolute allan deviation below 109 with a standard deviation of 1 mhz over 10h is achieved using this laser for cooling and trapping of strontium atoms the wavemeter scheme provides excellent stability in singlechannel operation multichannel operation with a multimode fiber switch results in fluctuations of the atomic fluorescence correlated to residual frequency excursions of the laser the wavemeterbased frequency stabilization scheme can be applied to a wide range of atoms and molecules for laser spectroscopy cooling and trapping | [['we', 'present', 'the', 'characterization', 'of', 'a', 'laser', 'frequency', 'stabilization', 'scheme', 'using', 'a', 'stateoftheart', 'wavelength', 'meter', 'based', 'on', 'solid', 'fizeau', 'interferometers', 'for', 'a', 'frequencydoubled', 'tisapphire', 'laser', 'operated', 'at', '461', 'nm', 'an', 'absolute', 'allan', 'deviation', 'below', '109', 'with', 'a', 'standard', 'deviation', 'of', '1', 'mhz', 'over', '10h', 'is', 'achieved', 'using', 'this', 'laser', 'for', 'cooling', 'and', 'trapping', 'of', 'strontium', 'atoms', 'the', 'wavemeter', 'scheme', 'provides', 'excellent', 'stability', 'in', 'singlechannel', 'operation', 'multichannel', 'operation', 'with', 'a', 'multimode', 'fiber', 'switch', 'results', 'in', 'fluctuations', 'of', 'the', 'atomic', 'fluorescence', 'correlated', 'to', 'residual', 'frequency', 'excursions', 'of', 'the', 'laser', 'the', 'wavemeterbased', 'frequency', 'stabilization', 'scheme', 'can', 'be', 'applied', 'to', 'a', 'wide', 'range', 'of', 'atoms', 'and', 'molecules', 'for', 'laser', 'spectroscopy', 'cooling', 'and', 'trapping']] | [-0.12254936241165355, 0.20357076645329167, -0.06803516806448223, -0.06295211811515468, 0.05276635861783116, -0.18806588099094504, 0.1017101966491383, 0.4719636479254674, -0.2133033759633286, -0.27737364490059446, 0.06930086856219633, -0.21411625226028264, 0.001662557772188275, 0.3296060623187158, -0.055514161535366265, 0.047869028113954874, 0.040813608890554555, -0.08371201778451602, -0.018675822149142967, -0.13161909122761614, 0.1653060306411202, 0.12610911296064, 0.31257474787222844, 0.008845753484853992, 0.1750059080120452, -0.024207181405034608, 0.08515237405447772, -0.09165491604384172, -0.11885102989186568, 0.10048942614769286, 0.2538890831422544, 0.003308644177633579, 0.2666554795017604, -0.3791389975231141, -0.2202264761759175, 0.057547293976380455, 0.09163681194574262, 0.14080076118827695, -0.060350655962894156, -0.2937965342835351, 0.009832682790821072, -0.1647984879091382, -0.13332156514041815, -0.027552457414222537, -0.007509375210954911, 0.08102325679458401, -0.3320672673828624, -0.0020639004306522786, -0.003569242320264931, 0.15695669164846618, -0.05624668885893361, -0.05511105790975745, 0.06348746384200812, 0.015482966818294867, -0.11456115448338634, 0.042355112548210415, 0.21624196333276038, -0.04402338003489637, -0.07896141789819079, 0.3745221083431884, -0.2142509606546136, -0.037051751657768535, 0.13385547095418182, -0.16192861148846094, 0.004380068021688472, 0.22261140795200374, 0.12849585824113563, 0.10660492818526647, -0.09551777269074659, 0.006785933476445886, 0.05074352299777308, 0.29329053314264725, 0.21792278120604655, 0.13272915133792493, 0.18087329110561837, 0.26670998446988287, 0.07693720960782634, 0.13272222450123755, -0.2052032506520239, -0.029275736728407168, -0.2502618497323797, -0.08602216606097365, -0.18161815006492865, 0.07126868598128634, -0.04187028959818741, -0.09023004535723615, 0.39285192753895565, 0.1182555821120601, 0.08305467915272823, -0.009387809425350968, 0.3587328310435017, 0.11304054236798375, 0.06730712428516536, -0.0600669493648672, 0.294566551119917, 0.18494525682008653, 0.11182984360385928, -0.2760823542700597, -0.07363253217880372, -0.00544526542890472] |
1,802.09275 | A Way Out of the Bubble Trouble? - Upon Reconstructing the Origin of the
Local Bubble and Loop I via Radioisotopic Signatures on Earth | Deep-sea archives all over the world show an enhanced concentration of the
radionuclide $^{60}$Fe, isolated in layers dating from about 2.2 Myr ago. Since
this comparatively long-lived isotope is not naturally produced on Earth, such
an enhancement can only be attributed to extraterrestrial sources, particularly
one or several nearby supernovae in the recent past. It has been speculated
that these supernovae might have been involved in the formation of the Local
Superbubble, our Galactic habitat. Here, we summarize our efforts in giving a
quantitative evidence for this scenario. Besides analytical calculations, we
present results from high-resolution hydrodynamical simulations of the Local
Superbubble and its presumptive neighbor Loop I in different environments,
including a self-consistently evolved supernova-driven interstellar medium. For
the superbubble modeling, the time sequence and locations of the generating
core-collapse supernova explosions are taken into account, which are derived
from the mass spectrum of the perished members of certain, carefully
preselected stellar moving groups. The release and turbulent mixing of
$^{60}$Fe is followed via passive scalars, where the yields of the decaying
radioisotope were adjusted according to recent stellar evolution calculations.
The models are able to reproduce both the timing and the intensity of the
$^{60}$Fe excess observed with rather high precision. We close with a
discussion of recent developments and give future perspectives.
| astro-ph.HE astro-ph.GA | deepsea archives all over the world show an enhanced concentration of the radionuclide 60fe isolated in layers dating from about 22 myr ago since this comparatively longlived isotope is not naturally produced on earth such an enhancement can only be attributed to extraterrestrial sources particularly one or several nearby supernovae in the recent past it has been speculated that these supernovae might have been involved in the formation of the local superbubble our galactic habitat here we summarize our efforts in giving a quantitative evidence for this scenario besides analytical calculations we present results from highresolution hydrodynamical simulations of the local superbubble and its presumptive neighbor loop i in different environments including a selfconsistently evolved supernovadriven interstellar medium for the superbubble modeling the time sequence and locations of the generating corecollapse supernova explosions are taken into account which are derived from the mass spectrum of the perished members of certain carefully preselected stellar moving groups the release and turbulent mixing of 60fe is followed via passive scalars where the yields of the decaying radioisotope were adjusted according to recent stellar evolution calculations the models are able to reproduce both the timing and the intensity of the 60fe excess observed with rather high precision we close with a discussion of recent developments and give future perspectives | [['deepsea', 'archives', 'all', 'over', 'the', 'world', 'show', 'an', 'enhanced', 'concentration', 'of', 'the', 'radionuclide', '60fe', 'isolated', 'in', 'layers', 'dating', 'from', 'about', '22', 'myr', 'ago', 'since', 'this', 'comparatively', 'longlived', 'isotope', 'is', 'not', 'naturally', 'produced', 'on', 'earth', 'such', 'an', 'enhancement', 'can', 'only', 'be', 'attributed', 'to', 'extraterrestrial', 'sources', 'particularly', 'one', 'or', 'several', 'nearby', 'supernovae', 'in', 'the', 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1,802.09276 | A Serendipitous MWA Search for Narrow-band and Broad-band Low Frequency
Radio Transmissions from 1I/2017 U1 'Oumuamua | We examine data from the Murchison Widefield Array (MWA) in the frequency
range 72 -- 102 MHz for a field-of-view that serendipitously contained the
interstellar object 'Oumuamua on 2017 November 28. Observations took place with
time resolution of 0.5 s and frequency resolution of 10 kHz. %This observation
was undertaken for another purpose but due to the MWA's extremely large
field-of-view, 'Oumuamua was serendipitously observed simultaneously. Based on
the interesting but highly unlikely suggestion that 'Oumuamua is an
interstellar spacecraft, due to some unusual orbital and morphological
characteristics, we examine our data for signals that might indicate the
presence of intelligent life associated with 'Oumuamua. We searched our radio
data for: 1) impulsive narrow-band signals; 2) persistent narrow-band signals;
and 3) impulsive broadband signals. We found no such signals with
non-terrestrial origins and make estimates of the upper limits on Equivalent
Isotropic Radiated Power (EIRP) for these three cases of approximately 7 kW,
840 W, and 100 kW, respectively. These transmitter powers are well within the
capabilities of human technologies, and are therefore plausible for alien
civilizations. While the chances of positive detection in any given Search for
Extraterrestrial Intelligence (SETI) experiment are vanishingly small, the
characteristics of new generation telescopes such as the MWA (and in the
future, the Square Kilometre Array) make certain classes of SETI experiment
easy, or even a trivial by-product of astrophysical observations. This means
that the future costs of SETI experiments are very low, allowing large target
lists to partially balance the low probability of a positive detection.
| astro-ph.IM astro-ph.EP | we examine data from the murchison widefield array mwa in the frequency range 72 102 mhz for a fieldofview that serendipitously contained the interstellar object oumuamua on 2017 november 28 observations took place with time resolution of 05 s and frequency resolution of 10 khz this observation was undertaken for another purpose but due to the mwas extremely large fieldofview oumuamua was serendipitously observed simultaneously based on the interesting but highly unlikely suggestion that oumuamua is an interstellar spacecraft due to some unusual orbital and morphological characteristics we examine our data for signals that might indicate the presence of intelligent life associated with oumuamua we searched our radio data for 1 impulsive narrowband signals 2 persistent narrowband signals and 3 impulsive broadband signals we found no such signals with nonterrestrial origins and make estimates of the upper limits on equivalent isotropic radiated power eirp for these three cases of approximately 7 kw 840 w and 100 kw respectively these transmitter powers are well within the capabilities of human technologies and are therefore plausible for alien civilizations while the chances of positive detection in any given search for extraterrestrial intelligence seti experiment are vanishingly small the characteristics of new generation telescopes such as the mwa and in the future the square kilometre array make certain classes of seti experiment easy or even a trivial byproduct of astrophysical observations this means that the future costs of seti experiments are very low allowing large target lists to partially balance the low probability of a positive detection | [['we', 'examine', 'data', 'from', 'the', 'murchison', 'widefield', 'array', 'mwa', 'in', 'the', 'frequency', 'range', '72', '102', 'mhz', 'for', 'a', 'fieldofview', 'that', 'serendipitously', 'contained', 'the', 'interstellar', 'object', 'oumuamua', 'on', '2017', 'november', '28', 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1,802.09277 | Robust Preconditioning for Space-Time Isogeometric Analysis of Parabolic
Evolution Problems | We propose and investigate new robust preconditioners for space-time
Isogeometric Analysis of parabolic evolution problems. These preconditioners
are based on a time parallel multigrid method. We consider a decomposition of
the space-time cylinder into time-slabs which are coupled via a discontinuous
Galerkin technique. The time-slabs provide the structure for the time-parallel
multigrid solver. The most important part of the multigrid method is the
smoother. We utilize the special structure of the involved operator to decouple
its application into several spatial problems by means of generalized
eigenvalue or Schur decompositions. Some of these problems have a symmetric
saddle point structure, for which we present robust preconditions. Finally, we
present numerical experiments confirming the robustness of our space-time IgA
solver.
| math.NA | we propose and investigate new robust preconditioners for spacetime isogeometric analysis of parabolic evolution problems these preconditioners are based on a time parallel multigrid method we consider a decomposition of the spacetime cylinder into timeslabs which are coupled via a discontinuous galerkin technique the timeslabs provide the structure for the timeparallel multigrid solver the most important part of the multigrid method is the smoother we utilize the special structure of the involved operator to decouple its application into several spatial problems by means of generalized eigenvalue or schur decompositions some of these problems have a symmetric saddle point structure for which we present robust preconditions finally we present numerical experiments confirming the robustness of our spacetime iga solver | [['we', 'propose', 'and', 'investigate', 'new', 'robust', 'preconditioners', 'for', 'spacetime', 'isogeometric', 'analysis', 'of', 'parabolic', 'evolution', 'problems', 'these', 'preconditioners', 'are', 'based', 'on', 'a', 'time', 'parallel', 'multigrid', 'method', 'we', 'consider', 'a', 'decomposition', 'of', 'the', 'spacetime', 'cylinder', 'into', 'timeslabs', 'which', 'are', 'coupled', 'via', 'a', 'discontinuous', 'galerkin', 'technique', 'the', 'timeslabs', 'provide', 'the', 'structure', 'for', 'the', 'timeparallel', 'multigrid', 'solver', 'the', 'most', 'important', 'part', 'of', 'the', 'multigrid', 'method', 'is', 'the', 'smoother', 'we', 'utilize', 'the', 'special', 'structure', 'of', 'the', 'involved', 'operator', 'to', 'decouple', 'its', 'application', 'into', 'several', 'spatial', 'problems', 'by', 'means', 'of', 'generalized', 'eigenvalue', 'or', 'schur', 'decompositions', 'some', 'of', 'these', 'problems', 'have', 'a', 'symmetric', 'saddle', 'point', 'structure', 'for', 'which', 'we', 'present', 'robust', 'preconditions', 'finally', 'we', 'present', 'numerical', 'experiments', 'confirming', 'the', 'robustness', 'of', 'our', 'spacetime', 'iga', 'solver']] | [-0.11098276009172461, -0.018175006966438083, -0.13654405779552536, 0.028292024457803534, -0.09850467553646383, -0.14566308948590215, -0.0364932485074752, 0.3770263430236255, -0.31144863854545185, -0.23529667061579934, 0.17241024213124825, -0.2053133063116979, -0.17457380252535123, 0.1895743771357525, -0.02395599869166706, 0.10247347578781231, 0.10728807490066451, -0.0533119428493931, -0.14158748536197058, -0.20609148750002731, 0.36700314231280046, 0.03590421054524101, 0.24546392694297167, 0.02123160348707905, 0.10719818797483409, -0.06921942655679818, -0.06795871610579601, 0.041835025079169516, -0.09624528390813177, 0.14346362819295314, 0.24924726762524727, 0.10605778925858786, 0.33212156384449326, -0.4561373577689973, -0.1901503919576437, 0.053238947654805954, 0.15809231906561022, 0.12116274887782727, -0.10064006192408408, -0.27995355156550217, 0.09983777368670109, -0.11922791022491658, -0.15354368205466387, -0.15677101022200818, -0.08625791330922443, 0.0013875062577426434, -0.26309826511098466, 0.07729623679237409, 0.07622652645301768, 0.02451975648764963, -0.06666699777479615, -0.17158961979380288, 0.03762770680734351, 0.03653671505063835, -0.002912410545770584, -0.07156129111141218, 0.05595477665103656, -0.025982010403206034, -0.10741724713973827, 0.3951796750869539, -0.01983551186227271, -0.2866087692584527, 0.14773028304650432, -0.043302055771888816, -0.1377200532499385, 0.10097049706777306, 0.2369599286664151, 0.2302037490121389, -0.08846178557871746, 0.12985585294851354, -0.03365057057274853, 0.12318726337610515, 0.0346223642256395, -0.024242830881059677, 0.11635727564985784, 0.19097796379257057, 0.1346734350929984, 0.16820620354738527, -0.07096465978321571, -0.12542904679410918, -0.3141988835818434, -0.16860543742333933, -0.13089777205644523, -0.011228756982067569, -0.1748631136259804, -0.2589240369971021, 0.4322833378751904, 0.17473479506749093, 0.10932063838167085, 0.02581862006454839, 0.3171109472227804, 0.14792478711727092, 0.045656659900826416, 0.11110178623383005, 0.18108899069094628, 0.18257151920766712, 0.10629593069325753, -0.2589372977243452, -0.014927432197540745, 0.20173342224068436] |
1,802.09278 | Bayesian regional flood frequency analysis for large catchments | Regional flood frequency analysis is commonly applied in situations where
there exists insufficient data at a location for a reliable estimation of flood
quantiles. We develop a Bayesian hierarchical modeling framework for a regional
analysis of data from 203 large catchments in Norway with the generalized
extreme value (GEV) distribution as the underlying model. Generalized linear
models on the parameters of the GEV distribution are able to incorporate
location-specific geographic and meteorological information and thereby
accommodate these effects on the flood quantiles. A Bayesian model averaging
component additionally assesses model uncertainty in the effect of the proposed
covariates. The resulting regional model is seen to give substantially better
predictive performance than the regional model currently used in Norway.
| stat.AP | regional flood frequency analysis is commonly applied in situations where there exists insufficient data at a location for a reliable estimation of flood quantiles we develop a bayesian hierarchical modeling framework for a regional analysis of data from 203 large catchments in norway with the generalized extreme value gev distribution as the underlying model generalized linear models on the parameters of the gev distribution are able to incorporate locationspecific geographic and meteorological information and thereby accommodate these effects on the flood quantiles a bayesian model averaging component additionally assesses model uncertainty in the effect of the proposed covariates the resulting regional model is seen to give substantially better predictive performance than the regional model currently used in norway | [['regional', 'flood', 'frequency', 'analysis', 'is', 'commonly', 'applied', 'in', 'situations', 'where', 'there', 'exists', 'insufficient', 'data', 'at', 'a', 'location', 'for', 'a', 'reliable', 'estimation', 'of', 'flood', 'quantiles', 'we', 'develop', 'a', 'bayesian', 'hierarchical', 'modeling', 'framework', 'for', 'a', 'regional', 'analysis', 'of', 'data', 'from', '203', 'large', 'catchments', 'in', 'norway', 'with', 'the', 'generalized', 'extreme', 'value', 'gev', 'distribution', 'as', 'the', 'underlying', 'model', 'generalized', 'linear', 'models', 'on', 'the', 'parameters', 'of', 'the', 'gev', 'distribution', 'are', 'able', 'to', 'incorporate', 'locationspecific', 'geographic', 'and', 'meteorological', 'information', 'and', 'thereby', 'accommodate', 'these', 'effects', 'on', 'the', 'flood', 'quantiles', 'a', 'bayesian', 'model', 'averaging', 'component', 'additionally', 'assesses', 'model', 'uncertainty', 'in', 'the', 'effect', 'of', 'the', 'proposed', 'covariates', 'the', 'resulting', 'regional', 'model', 'is', 'seen', 'to', 'give', 'substantially', 'better', 'predictive', 'performance', 'than', 'the', 'regional', 'model', 'currently', 'used', 'in', 'norway']] | [3.301714531193345e-05, 0.03946977511040425, -0.10862454426695861, 0.18018532402012338, -0.07171775731731649, -0.11132863167894341, 0.07015793383816037, 0.3445053198138031, -0.23049680933640418, -0.33642301263319235, 0.1371082138292091, -0.27598156778820615, -0.09863718772717452, 0.1797389431552709, -0.10309009653342477, 0.07989210570310006, 0.05985073092042358, 0.025091323796344007, -0.015358228713936977, -0.182969706930157, 0.24642944618491297, 0.12031528471684935, 0.3683861280965098, 0.019873998127877712, 0.11165260667399646, 0.012956732844586595, -0.05979727611529751, -0.009401337762552676, -0.11962590462891227, 0.14256107484748176, 0.31276439856560884, 0.16414153113392954, 0.3240712706425811, -0.3927900750126879, -0.3019193966312618, 0.1284507685775032, 0.06820000273025578, 0.030168517319075133, 0.015283172853464672, -0.2888861179856931, 0.026209687024860057, -0.21744771623960302, -0.1027335968476294, -0.04666081728350561, -0.02532454058370095, -0.009959469739766002, -0.3573845582619562, 0.15080482018046018, -0.010259293528841966, 0.12337373610649069, -0.044178374871311675, -0.16466414787948636, -0.04135631027205263, 0.11316202629468072, 0.05140983796741624, -0.014559356303356778, 0.11735999575516178, -0.08704073228320833, -0.090498841004604, 0.36670791799739255, -0.057736538177562316, -0.21227641682085283, 0.13717190004585278, -0.12535406510400884, -0.16530798433123597, 0.07730474348093178, 0.28283957781869984, 0.03920977477426246, -0.19300956915870657, 0.012351119827421903, -0.035758930945105974, 0.181382874638075, 0.0061542618648796265, -0.050689649961541516, 0.20221110802120135, 0.22201612770312734, 0.09151052731341856, 0.07779811980928909, -0.2024472311131214, -0.12969842827799966, -0.2562781571177766, -0.028441968539698145, -0.11893828790161316, -0.04342325637708971, -0.1507329549795802, -0.166330927285421, 0.4238539189258117, 0.25581945689253005, 0.1893008611040679, 0.03553428448799808, 0.296166096082928, 0.09404042102120248, 0.06859200817169779, 0.1003683006738202, 0.16854213952418354, 0.05339705021815153, 0.11758186116467341, -0.14710543218455513, 0.16697736335444754, -0.013301827678441118] |
1,802.09279 | On parametric Borel summability for linear singularly perturbed Cauchy
problems with linear fractional transforms | We consider a family of linear singularly perturbed Cauchy problems which
combines partial differential operators and linear fractional transforms. We
construct a collection of holomorphic solutions on a full covering by sectors
of a neighborhood of the origin in $\mathbb{C}$ with respect to the
perturbation parameter $\epsilon$. This set is built up through classical and
special Laplace transforms along piecewise linear paths of functions which
possess exponential or super exponential growth/decay on horizontal strips. A
fine structure which entails two levels of Gevrey asymptotics of order 1 and
so-called order $1^{+}$ is witnessed. Furthermore, unicity properties regarding
the $1^{+}$ asymptotic layer are observed and follow from results on
summability w.r.t a particular strongly regular sequence recently obtained in a
previous study.
| math.AP math.CV | we consider a family of linear singularly perturbed cauchy problems which combines partial differential operators and linear fractional transforms we construct a collection of holomorphic solutions on a full covering by sectors of a neighborhood of the origin in mathbbc with respect to the perturbation parameter epsilon this set is built up through classical and special laplace transforms along piecewise linear paths of functions which possess exponential or super exponential growthdecay on horizontal strips a fine structure which entails two levels of gevrey asymptotics of order 1 and socalled order 1 is witnessed furthermore unicity properties regarding the 1 asymptotic layer are observed and follow from results on summability wrt a particular strongly regular sequence recently obtained in a previous study | [['we', 'consider', 'a', 'family', 'of', 'linear', 'singularly', 'perturbed', 'cauchy', 'problems', 'which', 'combines', 'partial', 'differential', 'operators', 'and', 'linear', 'fractional', 'transforms', 'we', 'construct', 'a', 'collection', 'of', 'holomorphic', 'solutions', 'on', 'a', 'full', 'covering', 'by', 'sectors', 'of', 'a', 'neighborhood', 'of', 'the', 'origin', 'in', 'mathbbc', 'with', 'respect', 'to', 'the', 'perturbation', 'parameter', 'epsilon', 'this', 'set', 'is', 'built', 'up', 'through', 'classical', 'and', 'special', 'laplace', 'transforms', 'along', 'piecewise', 'linear', 'paths', 'of', 'functions', 'which', 'possess', 'exponential', 'or', 'super', 'exponential', 'growthdecay', 'on', 'horizontal', 'strips', 'a', 'fine', 'structure', 'which', 'entails', 'two', 'levels', 'of', 'gevrey', 'asymptotics', 'of', 'order', '1', 'and', 'socalled', 'order', '1', 'is', 'witnessed', 'furthermore', 'unicity', 'properties', 'regarding', 'the', '1', 'asymptotic', 'layer', 'are', 'observed', 'and', 'follow', 'from', 'results', 'on', 'summability', 'wrt', 'a', 'particular', 'strongly', 'regular', 'sequence', 'recently', 'obtained', 'in', 'a', 'previous', 'study']] | [-0.14079757390374487, 0.062273140767712364, -0.05728806932033463, 0.044166276505609496, -0.0864254158617513, -0.09208930292636279, 0.01440665129021826, 0.3294066296320809, -0.3180880946807625, -0.22460228486288694, 0.15531534841187944, -0.2977232237419591, -0.14124238919197343, 0.17539407227242226, -0.050194683203796955, 0.11337986087892205, 0.026164541090261347, 0.04313860093204936, -0.11039933201679883, -0.20673547307999174, 0.3933067764069578, -0.04376882599466596, 0.21501812662867723, -0.04342843809603783, 0.13130567006743704, -0.02081030785791145, -0.046555903955739886, 0.02452099659915028, -0.16697238817472349, 0.1254346998839462, 0.19438219699462153, 0.04937177110648106, 0.2962244987383885, -0.4046934011723261, -0.18852594108436227, 0.10275971841197923, 0.151907849841374, 0.0038200923605352516, -0.027392156101755553, -0.256328456604099, 0.10475368728699579, -0.1123418153277098, -0.18086857927870775, -0.07257842652505449, 0.012121819471555554, 0.08495019573510494, -0.3027736728011307, 0.055617104426857605, 0.12421751557079659, 0.045786433539561126, -0.06423412112919383, -0.10174983089851324, -0.014287766590637485, 0.05202661055786735, 0.03689127957760087, 0.018385858527069126, 0.039836208978744826, -0.08996593473625393, -0.11236429160984218, 0.32726929998862336, -0.08785428492783391, -0.22935798254695314, 0.15481047423110028, -0.18254058993967973, -0.14375414937342063, 0.12601112530755326, 0.16609883783981666, 0.16339345164943395, -0.10237878247420111, 0.1847682515243915, -0.04898571138739709, 0.16487809031439776, 0.14121285148449858, 0.02106399828383376, 0.1304831297544778, 0.12184499433140986, 0.12375127461023075, 0.15712467348203063, -0.008711982343330487, -0.14560326916350375, -0.3197419326444549, -0.13000092964450066, -0.11139322332999368, 0.08968793575013102, -0.11312887846171849, -0.24504675750412847, 0.4352807231124275, 0.03993286074029497, 0.23253903718480518, 0.10187998321773253, 0.19182401282081674, 0.16823033119413774, 0.02856805070095565, 0.04590604274015593, 0.15316670277917926, 0.15657693895218847, 0.06969493278494675, -0.16009065667783057, 0.031232491393442734, 0.14554001113076595] |
1,802.0928 | Probing midplane CO abundance and gas temperature with DCO$^+$ in the
protoplanetary disk around HD 169142 | This work aims to understand which midplane conditions are probed by the
DCO$^+$ emission in the disk around the Herbig Ae star HD 169142. We explore
the sensitivity of the DCO$^+$ formation pathways to the gas temperature and
the CO abundance. The DCO$^+$ $J$=3-2 transition was observed with ALMA at a
spatial resolution of 0.3". The HD 169142 DCO$^+$ radial intensity profile
reveals a warm, inner component at radii <30 AU and a broad, ring-like
structure from ~50-230 AU with a peak at 100 AU just beyond the millimeter
grain edge. We modeled DCO$^+$ emission in HD 169142 with a physical disk
structure adapted from the literature, and employed a simple deuterium chemical
network to investigate the formation of DCO$^+$ through the cold deuterium
fractionation pathway via H$_2$D$^+$. Contributions from the warm deuterium
fractionation pathway via CH$_2$D$^+$ are approximated using a constant
abundance in the intermediate disk layers. Parameterized models show that
alterations to the midplane gas temperature and CO abundance of the literature
model are both needed to recover the observed DCO$^+$ radial intensity profile.
The best-fit model contains a shadowed, cold midplane in the region z/r < 0.1
with an 8 K decrease in gas temperature and a factor of five CO depletion just
beyond the millimeter grain edge, and a 2 K decrease in gas temperature for r >
120 AU. The warm deuterium fractionation pathway is implemented as a constant
DCO$^+$ abundance of 2.0$\times$10$^{-12}$ between 30-70 K. The DCO$^+$
emission probes a reservoir of cold material in the HD 169142 outer disk that
is not revealed by the millimeter continuum, the SED, nor the emission from the
12CO, 13CO, or C18O $J$=2-1 lines.
| astro-ph.SR astro-ph.EP astro-ph.GA | this work aims to understand which midplane conditions are probed by the dco emission in the disk around the herbig ae star hd 169142 we explore the sensitivity of the dco formation pathways to the gas temperature and the co abundance the dco j32 transition was observed with alma at a spatial resolution of 03 the hd 169142 dco radial intensity profile reveals a warm inner component at radii 30 au and a broad ringlike structure from 50230 au with a peak at 100 au just beyond the millimeter grain edge we modeled dco emission in hd 169142 with a physical disk structure adapted from the literature and employed a simple deuterium chemical network to investigate the formation of dco through the cold deuterium fractionation pathway via h_2d contributions from the warm deuterium fractionation pathway via ch_2d are approximated using a constant abundance in the intermediate disk layers parameterized models show that alterations to the midplane gas temperature and co abundance of the literature model are both needed to recover the observed dco radial intensity profile the bestfit model contains a shadowed cold midplane in the region zr 01 with an 8 k decrease in gas temperature and a factor of five co depletion just beyond the millimeter grain edge and a 2 k decrease in gas temperature for r 120 au the warm deuterium fractionation pathway is implemented as a constant dco abundance of 20times1012 between 3070 k the dco emission probes a reservoir of cold material in the hd 169142 outer disk that is not revealed by the millimeter continuum the sed nor the emission from the 12co 13co or c18o j21 lines | [['this', 'work', 'aims', 'to', 'understand', 'which', 'midplane', 'conditions', 'are', 'probed', 'by', 'the', 'dco', 'emission', 'in', 'the', 'disk', 'around', 'the', 'herbig', 'ae', 'star', 'hd', '169142', 'we', 'explore', 'the', 'sensitivity', 'of', 'the', 'dco', 'formation', 'pathways', 'to', 'the', 'gas', 'temperature', 'and', 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1,802.09281 | Multi Phase in Cold Dense Quark Matter | In this article, we study dynamic chiral symmetry breaking at zero
temperature, finite chemical potential and external magnetic field with
massless NJL model. We have proposed a mathematical method to classify phases
in phase diagram of cold dense quark matter, and use mathematical analysis to
identify the multi phase phenomenon among solutions for gap equation which
means with fixed chemical potential and magnetic field, there could be two
phases coexisting.
| hep-ph hep-th | in this article we study dynamic chiral symmetry breaking at zero temperature finite chemical potential and external magnetic field with massless njl model we have proposed a mathematical method to classify phases in phase diagram of cold dense quark matter and use mathematical analysis to identify the multi phase phenomenon among solutions for gap equation which means with fixed chemical potential and magnetic field there could be two phases coexisting | [['in', 'this', 'article', 'we', 'study', 'dynamic', 'chiral', 'symmetry', 'breaking', 'at', 'zero', 'temperature', 'finite', 'chemical', 'potential', 'and', 'external', 'magnetic', 'field', 'with', 'massless', 'njl', 'model', 'we', 'have', 'proposed', 'a', 'mathematical', 'method', 'to', 'classify', 'phases', 'in', 'phase', 'diagram', 'of', 'cold', 'dense', 'quark', 'matter', 'and', 'use', 'mathematical', 'analysis', 'to', 'identify', 'the', 'multi', 'phase', 'phenomenon', 'among', 'solutions', 'for', 'gap', 'equation', 'which', 'means', 'with', 'fixed', 'chemical', 'potential', 'and', 'magnetic', 'field', 'there', 'could', 'be', 'two', 'phases', 'coexisting']] | [-0.1604476164348723, 0.2060288635631358, -0.10990276442774172, 0.021495071258063294, -0.08879245575850031, -0.15074155675912543, 0.08769600580313376, 0.3809229687122362, -0.24204182885587217, -0.3178142337394612, 0.03291833993779229, -0.2465436027917479, -0.14883529583790472, 0.054678292010378625, 0.05498245205464108, 0.016793764316077743, -0.07191466383270122, 0.007267024068694029, -0.07895853852054903, -0.19068560958839953, 0.338859697717375, -0.08244241703027261, 0.2661744386755994, 0.0821905204959746, 0.034458547245178904, -0.051573426522580644, 0.041883886858288734, 0.03878246289012688, -0.14251720971826995, -0.037201572063245945, 0.2411749556219937, -0.005146252057914223, 0.17178967937028833, -0.4306133260684354, -0.28683278984722815, 0.1634891112068934, 0.14610587666476413, 0.15705230664295544, -0.13182145870689835, -0.27822493269507376, 0.08319780470005103, -0.19207373498273747, -0.2211450995611293, -0.15316291816000427, -0.015638536431028374, -0.034188072506471406, -0.2520977718955172, 0.09240117658461844, -0.03550702036757555, 0.120357811204823, -0.11320181818945067, -0.10911006946116686, -0.033092584174924666, 0.06074932860875768, 0.061128201413833134, 0.08212171791986163, 0.11235491632251068, -0.15647757844666818, -0.08043221534628953, 0.3796197541656771, -0.07540531030723027, -0.14561991359036516, 0.2258459046749132, -0.14029085636845723, -0.15544413707352112, 0.13165265833958983, 0.15467860362093364, 0.05424900898443801, -0.18560947825067808, 0.0906152666055797, 0.024790064684514487, 0.1411584734500918, 0.06362157345616391, 0.02140157506801188, 0.2996720109667097, 0.2089290550510798, 0.006477718377885009, 0.13578101868707954, -0.03687484760469358, -0.15973136287980846, -0.2892844163679651, -0.13053496974919523, -0.1354989101045898, -0.029522420597329204, -0.09757444430579199, -0.20245571713894606, 0.4256284999727671, 0.18463928712465402, 0.125204928385626, -0.06070623747572037, 0.2889264744906021, 0.08914689667789, 0.03500695245872651, 0.05355556671108518, 0.21854555845576604, 0.2154404751956463, 0.15379687308200768, -0.2648870639769094, -0.06109271200506815, 0.08638978861272335] |
1,802.09282 | Profinite completions, cohomology and JSJ decompositions of compact
3-manifolds | In this paper we extend previous results concerning the behaviour of JSJ
decompositions of closed 3-manifolds with respect to the profinite completion
to the case of compact 3-manifolds with boundary.
We also illustrate an alternative and perhaps more natural approach to part
of the original theorem, using relative cohomology to analyse the actions of
an-annular atoroidal groups on profinite trees.
| math.GT | in this paper we extend previous results concerning the behaviour of jsj decompositions of closed 3manifolds with respect to the profinite completion to the case of compact 3manifolds with boundary we also illustrate an alternative and perhaps more natural approach to part of the original theorem using relative cohomology to analyse the actions of anannular atoroidal groups on profinite trees | [['in', 'this', 'paper', 'we', 'extend', 'previous', 'results', 'concerning', 'the', 'behaviour', 'of', 'jsj', 'decompositions', 'of', 'closed', '3manifolds', 'with', 'respect', 'to', 'the', 'profinite', 'completion', 'to', 'the', 'case', 'of', 'compact', '3manifolds', 'with', 'boundary', 'we', 'also', 'illustrate', 'an', 'alternative', 'and', 'perhaps', 'more', 'natural', 'approach', 'to', 'part', 'of', 'the', 'original', 'theorem', 'using', 'relative', 'cohomology', 'to', 'analyse', 'the', 'actions', 'of', 'anannular', 'atoroidal', 'groups', 'on', 'profinite', 'trees']] | [-0.13023419178207404, 0.04351969468625612, -0.13705310023700198, 0.0835883214584707, -0.1346989797738691, -0.06352873682044446, 0.031966297501154865, 0.3847975897292296, -0.2796744853258133, -0.26709210114883414, 0.11904794423802136, -0.25739049846306444, -0.1406137456224921, 0.21998268732180198, -0.25183301316574214, -0.024576428439468147, 0.10020586885511876, 0.11549157346598804, -0.0842442583758384, -0.290945769349734, 0.44101073970474924, 0.011126978602260352, 0.20490966632496566, 0.08878252478316426, 0.069160950758184, -0.023127108362192908, -0.07937596784904599, 0.006702320619175832, -0.1765968846855685, 0.17746242197075238, 0.29500568102812397, 0.046944125671871006, 0.16801531706005335, -0.39990074435869855, -0.1179973064456135, 0.1884315776328246, 0.1032040011137724, 0.031544892971093454, -0.017042034072073876, -0.3066008336027153, 0.1166444917054226, -0.17573227256846924, -0.15507854387784997, -0.07047456254755767, 0.029882446862757206, -0.04341754994044701, -0.15774842604684333, -0.012633807977060011, 0.11007521197182844, 0.0773891278853019, -0.11039848376919205, -0.08906417795612166, -0.003176262458631148, 0.14841320696286858, 0.07655980802762012, 0.01627000343675415, 0.1053240566359212, -0.08071484661583478, -0.1619850619114004, 0.39407379484424987, -0.0916051369936516, -0.22819913333902755, 0.2262935787594567, -0.14348167704107861, -0.23680765442550183, 0.110325010602052, 0.11526398768958947, 0.19491452670966586, -0.03713769824244082, 0.13671058598653568, -0.11960985970799812, 0.07130146976560355, 0.09625525521114468, -0.012531401822343469, 0.09237383023525278, 0.1395566049371458, 0.11081464943320801, 0.19363505172465617, 0.07413288255532582, -0.030383623174081244, -0.3189737431394557, -0.20280463102584084, -0.07984870774671435, 0.09337063124015306, -0.10180609804398652, -0.2117924620436194, 0.39534253558764854, 0.12127946519758552, 0.14588359811653692, 0.21387993701112767, 0.2815014778325955, -0.0054930309803845985, 0.03014529721792011, 0.06770544392056763, 0.10966229980501035, 0.2454418134720375, -0.03945807646183918, -0.13476046933792532, -0.046494159994957346, 0.19624341080586116] |
1,802.09283 | Hierarchical quantum master equation approach to electronic-vibrational
coupling in nonequilibrium transport through nanosystems: Reservoir
formulation and application to vibrational instabilities | We present a novel hierarchical quantum master equation (HQME) approach which
provides a numerically exact description of nonequilibrium charge transport in
nanosystems with electronic-vibrational coupling. In contrast to previous work
[Phys. Rev. B $\bf{94}$, 201407 (2016)], the active vibrational degrees of
freedom are treated in the reservoir subspace and are integrated out. This
facilitates applications to systems with very high excitation levels, for
example due to current-induced heating, while properties of the vibrational
degrees of freedom, such as the excitation level and other moments of the
vibrational distribution function, are still accessible. The method is applied
to a generic model of a nanosystem, which comprises a single electronic level
that is coupled to fermionic leads and a vibrational degree of freedom.
Converged results are obtained in a broad spectrum of parameters, ranging from
the nonadiabatic to the adiabatic transport regime. We specifically investigate
the phenomenon of vibrational instability, that is, the increase of
current-induced vibrational excitation for decreasing electronic-vibrational
coupling. The novel HQME approach allows us to analyze the influence of level
broadening due to both molecule-lead coupling and thermal effects. Results
obtained for the first two moments suggest that the vibrational excitation is
always described by a geometric distribution in the weak electronic-vibrational
coupling limit.
| cond-mat.mes-hall | we present a novel hierarchical quantum master equation hqme approach which provides a numerically exact description of nonequilibrium charge transport in nanosystems with electronicvibrational coupling in contrast to previous work phys rev b bf94 201407 2016 the active vibrational degrees of freedom are treated in the reservoir subspace and are integrated out this facilitates applications to systems with very high excitation levels for example due to currentinduced heating while properties of the vibrational degrees of freedom such as the excitation level and other moments of the vibrational distribution function are still accessible the method is applied to a generic model of a nanosystem which comprises a single electronic level that is coupled to fermionic leads and a vibrational degree of freedom converged results are obtained in a broad spectrum of parameters ranging from the nonadiabatic to the adiabatic transport regime we specifically investigate the phenomenon of vibrational instability that is the increase of currentinduced vibrational excitation for decreasing electronicvibrational coupling the novel hqme approach allows us to analyze the influence of level broadening due to both moleculelead coupling and thermal effects results obtained for the first two moments suggest that the vibrational excitation is always described by a geometric distribution in the weak electronicvibrational coupling limit | [['we', 'present', 'a', 'novel', 'hierarchical', 'quantum', 'master', 'equation', 'hqme', 'approach', 'which', 'provides', 'a', 'numerically', 'exact', 'description', 'of', 'nonequilibrium', 'charge', 'transport', 'in', 'nanosystems', 'with', 'electronicvibrational', 'coupling', 'in', 'contrast', 'to', 'previous', 'work', 'phys', 'rev', 'b', 'bf94', '201407', '2016', 'the', 'active', 'vibrational', 'degrees', 'of', 'freedom', 'are', 'treated', 'in', 'the', 'reservoir', 'subspace', 'and', 'are', 'integrated', 'out', 'this', 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1,802.09284 | Tensor Non-Gaussianity from Axion-Gauge-Fields Dynamics : Parameter
Search | We calculate the bispectrum of scale-invariant tensor modes sourced by
spectator SU(2) gauge fields during inflation in a model containing a scalar
inflaton, a pseudoscalar axion and SU(2) gauge fields. A large bispectrum is
generated in this model at tree-level as the gauge fields contain a tensor
degree of freedom, and its production is dominated by self-coupling of the
gauge fields. This is a unique feature of non-Abelian gauge theory. The shape
of the tensor bispectrum is approximately an equilateral shape for $3\lesssim
m_Q\lesssim 4$, where $m_Q$ is an effective dimensionless mass of the SU(2)
field normalised by the Hubble expansion rate during inflation. The amplitude
of non-Gaussianity of the tensor modes, characterised by the ratio $B_h/P^2_h$,
is inversely proportional to the energy density fraction of the gauge field.
This ratio can be much greater than unity, whereas the ratio from the vacuum
fluctuation of the metric is of order unity. The bispectrum is effective at
constraining large $m_Q$ regions of the parameter space, whereas the power
spectrum constrains small $m_Q$ regions.
| astro-ph.CO | we calculate the bispectrum of scaleinvariant tensor modes sourced by spectator su2 gauge fields during inflation in a model containing a scalar inflaton a pseudoscalar axion and su2 gauge fields a large bispectrum is generated in this model at treelevel as the gauge fields contain a tensor degree of freedom and its production is dominated by selfcoupling of the gauge fields this is a unique feature of nonabelian gauge theory the shape of the tensor bispectrum is approximately an equilateral shape for 3lesssim m_qlesssim 4 where m_q is an effective dimensionless mass of the su2 field normalised by the hubble expansion rate during inflation the amplitude of nongaussianity of the tensor modes characterised by the ratio b_hp2_h is inversely proportional to the energy density fraction of the gauge field this ratio can be much greater than unity whereas the ratio from the vacuum fluctuation of the metric is of order unity the bispectrum is effective at constraining large m_q regions of the parameter space whereas the power spectrum constrains small m_q regions | [['we', 'calculate', 'the', 'bispectrum', 'of', 'scaleinvariant', 'tensor', 'modes', 'sourced', 'by', 'spectator', 'su2', 'gauge', 'fields', 'during', 'inflation', 'in', 'a', 'model', 'containing', 'a', 'scalar', 'inflaton', 'a', 'pseudoscalar', 'axion', 'and', 'su2', 'gauge', 'fields', 'a', 'large', 'bispectrum', 'is', 'generated', 'in', 'this', 'model', 'at', 'treelevel', 'as', 'the', 'gauge', 'fields', 'contain', 'a', 'tensor', 'degree', 'of', 'freedom', 'and', 'its', 'production', 'is', 'dominated', 'by', 'selfcoupling', 'of', 'the', 'gauge', 'fields', 'this', 'is', 'a', 'unique', 'feature', 'of', 'nonabelian', 'gauge', 'theory', 'the', 'shape', 'of', 'the', 'tensor', 'bispectrum', 'is', 'approximately', 'an', 'equilateral', 'shape', 'for', '3lesssim', 'm_qlesssim', '4', 'where', 'm_q', 'is', 'an', 'effective', 'dimensionless', 'mass', 'of', 'the', 'su2', 'field', 'normalised', 'by', 'the', 'hubble', 'expansion', 'rate', 'during', 'inflation', 'the', 'amplitude', 'of', 'nongaussianity', 'of', 'the', 'tensor', 'modes', 'characterised', 'by', 'the', 'ratio', 'b_hp2_h', 'is', 'inversely', 'proportional', 'to', 'the', 'energy', 'density', 'fraction', 'of', 'the', 'gauge', 'field', 'this', 'ratio', 'can', 'be', 'much', 'greater', 'than', 'unity', 'whereas', 'the', 'ratio', 'from', 'the', 'vacuum', 'fluctuation', 'of', 'the', 'metric', 'is', 'of', 'order', 'unity', 'the', 'bispectrum', 'is', 'effective', 'at', 'constraining', 'large', 'm_q', 'regions', 'of', 'the', 'parameter', 'space', 'whereas', 'the', 'power', 'spectrum', 'constrains', 'small', 'm_q', 'regions']] | [-0.18570215128779904, 0.2864141623272136, -0.08747084057780312, 0.09454587750095765, -0.06844807371962816, -0.06901093878208057, -0.07813361846321427, 0.26257523502058844, -0.1925885562401484, -0.27440396385979565, 0.04464693266371101, -0.2626368836061481, -0.08119872723678674, 0.10500495878513902, 0.035604916814276404, -0.00614767168299295, -0.02414495943401776, 0.08309222991057837, -0.027886047048292204, -0.2511589437558809, 0.33257493271290406, 0.10453817085636889, 0.25686356765834395, 0.027363869788892128, 0.09736350044840947, -0.047226052297114886, -0.007316040792091585, -0.01079135635501349, -0.10930506365154596, 0.07524538467199925, 0.15874554012655553, 0.07232052985140507, 0.16926382473834298, -0.3259824431501329, -0.1672068312887431, 0.16413975951316603, 0.15229916412191574, 0.10113172002465409, 0.028065632645259884, -0.25448837296708543, 0.06891013164182797, -0.1894538782791214, -0.11733467850204118, -0.08247262240277932, 0.02627551473047146, -0.11480022367528256, -0.35142107116168037, 0.1602337995389997, -0.05317868139485226, 0.03385507193161175, -0.0052246083005550595, -0.11552811060374713, -0.07813464386854321, 0.0177511708893101, 0.16344610536607967, 0.10128637745373828, 0.19602991819436497, -0.2636741383453174, -0.03565109118832933, 0.40981005144250743, -0.1580159418611027, -0.172221910049591, 0.04484859425848459, -0.17254672317820438, -0.10342849520144655, 0.15152522827334264, 0.15665198414422132, 0.12134590440648882, -0.09067991636693477, 0.22972212306100545, 0.03259480756310308, 0.21910997260882356, 0.08843186446191634, 0.034635110013186934, 0.29737445647444793, 0.08710666542653651, 0.060889535424683026, 0.12928230065564789, -0.04406684689662036, -0.08088981978430906, -0.3840840441284373, -0.0940002004684442, -0.20781317490550197, 0.08260897786959129, -0.2233245705074617, -0.15900444173911477, 0.4456942516625585, 0.08577650724293884, 0.20746370640665512, 0.04912559311179554, 0.2898556317914935, 0.14517674617578877, 0.13141782028491006, 0.04521211089586894, 0.32582616040154416, 0.1916267364505021, 0.06979808675275896, -0.2443787467214005, -0.08363882658236167, 0.06918302695814739] |
1,802.09285 | A family of extremum seeking laws for a unicycle model with a moving
target: theoretical and experimental studies | In this paper, we propose and practically evaluate a class of gradient-free
control functions ensuring the motion of a unicycle-type system towards the
extremum point of a time-varying cost function. We prove that the unicycle is
able to track the extremum point, and illustrate our results by numerical
simulations and experiments that show that the proposed control functions
exhibit an improved tracking performance in comparison to standard extremum
seeking laws based on Lie bracket approximations.
| math.OC | in this paper we propose and practically evaluate a class of gradientfree control functions ensuring the motion of a unicycletype system towards the extremum point of a timevarying cost function we prove that the unicycle is able to track the extremum point and illustrate our results by numerical simulations and experiments that show that the proposed control functions exhibit an improved tracking performance in comparison to standard extremum seeking laws based on lie bracket approximations | [['in', 'this', 'paper', 'we', 'propose', 'and', 'practically', 'evaluate', 'a', 'class', 'of', 'gradientfree', 'control', 'functions', 'ensuring', 'the', 'motion', 'of', 'a', 'unicycletype', 'system', 'towards', 'the', 'extremum', 'point', 'of', 'a', 'timevarying', 'cost', 'function', 'we', 'prove', 'that', 'the', 'unicycle', 'is', 'able', 'to', 'track', 'the', 'extremum', 'point', 'and', 'illustrate', 'our', 'results', 'by', 'numerical', 'simulations', 'and', 'experiments', 'that', 'show', 'that', 'the', 'proposed', 'control', 'functions', 'exhibit', 'an', 'improved', 'tracking', 'performance', 'in', 'comparison', 'to', 'standard', 'extremum', 'seeking', 'laws', 'based', 'on', 'lie', 'bracket', 'approximations']] | [-0.11658359529148485, -0.016840333501120866, -0.11420375395037637, 0.03714877105242497, -0.0665368762471386, -0.12591517128276866, 0.06413969859587834, 0.37576989567763097, -0.2648734390433576, -0.30411620956619045, 0.11132095072015717, -0.25980748227369543, -0.23798266756725875, 0.20905059641793472, -0.11493196348397465, 0.11456370595339183, 0.08016496197465253, 0.032540121553088164, -0.09401218743595244, -0.21747882890741568, 0.3006483061645004, 0.06418248639769249, 0.28896133370093396, 0.03147291429844257, 0.17760591582093085, -0.011814136950871782, 0.00021604395068779185, 0.039635715068544485, -0.129574332648878, 0.11264636801757119, 0.24404182536779223, 0.11648653298175919, 0.3040960124265906, -0.3857647705999379, -0.1910367314200345, 0.1017051046105366, 0.12034175246859573, 0.054618230970526066, -0.11190568452946388, -0.2759744839214191, 0.11462014856452525, -0.13578663166058627, -0.15514926716207048, -0.13457714131013868, -0.03607908264431801, 0.08003012181536572, -0.3144523356663617, 0.021663152868387516, 0.04435835374091324, 0.03483096965764825, -0.11239202718904896, -0.08960503166560335, 0.017854967182879714, 0.11193235255180027, 0.006369667527316189, 0.03383911039831268, 0.16171229136100895, -0.12144966684570897, -0.177325357255098, 0.3581206257631247, -0.045553870533744024, -0.26871660380699747, 0.18404812377411872, -0.10953932665791866, -0.12557331823139778, 0.09002136408250679, 0.19406206601274176, 0.14347056387546095, -0.19322613240345507, 0.05582270821370814, -0.035891835489687884, 0.13442244150792249, -0.011830331018270069, -0.027547653821120795, 0.1496571705682908, 0.16446327000252298, 0.17498812066214914, 0.1604104295555452, -0.05639609529768948, -0.15891394995757052, -0.3168130753612196, -0.14517139325019074, -0.16681291082420865, 0.0016326850619972557, -0.09427483973185362, -0.14465031269434336, 0.42762218350292863, 0.2325147482491023, 0.18773903783310103, 0.14771751106741862, 0.29808351548539624, 0.161634827606896, 0.009881323393799263, 0.11695714321969128, 0.2462691544316004, 0.04738621327497468, 0.06449868696792102, -0.261137684725376, 0.042204081691247786, 0.08047994199787846] |
1,802.09286 | Chemistry of a newly detected circumbinary disk in Ophiuchus | (Abridged) Astronomers recently started discovering exoplanets around binary
systems. Therefore, understanding the formation and evolution of circumbinary
disks is crucial for a complete scenario of planet formation. The aim of this
paper is to present the detection of a circumbinary disk around Oph-IRS67 and
analyse its structure. We present high-angular-resolution (0.4", 60 AU)
observations of C17O, H13CO+ , C34S, SO2, C2H and c-C3H2 molecular transitions
with ALMA at 0.8 mm. The spectrally and spatially resolved maps reveal the
kinematics of the circumbinary disk as well as its chemistry. Molecular
abundances are estimated using RADEX. The continuum emission reveals the
presence of a circumbinary disk around the two sources. This disk has a
diameter of ~620 AU and is well traced by C17O and H13CO+ emission. C2H and
c-C3H2 trace a higher-density region which is spatially offset from the sources
(~430 AU). Finally, SO2 shows compact emission around one of the sources,
Oph-IRS67 B. The molecular transitions which trace the circumbinary disk are
consistent with a Keplerian profile on disk scales (< 200 AU) and an infalling
profile for envelope scales (> 200 AU). The Keplerian fit leads to a mass of
2.2 Msun. Inferred CO abundances w.r.t. H2 are comparable to the canonical ISM
value of 2.7e-4. This study proves the first detection of the circumbinary disk
associated with Oph-IRS67. The disk is chemically differentiated from the
nearby high-density region. The lack of methanol emission suggests the extended
disk dominates the mass budget in the inner- most regions of the protostellar
envelope, generating a flat density profile where less material is exposed to
high temperatures. Thus, complex organic molecules would be associated with
lower column densities. Finally, Oph-IRS67 is a promising candidate for the
detection of both circumstellar disks with higher-angular-resolution
observations.
| astro-ph.SR astro-ph.GA | abridged astronomers recently started discovering exoplanets around binary systems therefore understanding the formation and evolution of circumbinary disks is crucial for a complete scenario of planet formation the aim of this paper is to present the detection of a circumbinary disk around ophirs67 and analyse its structure we present highangularresolution 04 60 au observations of c17o h13co c34s so2 c2h and cc3h2 molecular transitions with alma at 08 mm the spectrally and spatially resolved maps reveal the kinematics of the circumbinary disk as well as its chemistry molecular abundances are estimated using radex the continuum emission reveals the presence of a circumbinary disk around the two sources this disk has a diameter of 620 au and is well traced by c17o and h13co emission c2h and cc3h2 trace a higherdensity region which is spatially offset from the sources 430 au finally so2 shows compact emission around one of the sources ophirs67 b the molecular transitions which trace the circumbinary disk are consistent with a keplerian profile on disk scales 200 au and an infalling profile for envelope scales 200 au the keplerian fit leads to a mass of 22 msun inferred co abundances wrt h2 are comparable to the canonical ism value of 27e4 this study proves the first detection of the circumbinary disk associated with ophirs67 the disk is chemically differentiated from the nearby highdensity region the lack of methanol emission suggests the extended disk dominates the mass budget in the inner most regions of the protostellar envelope generating a flat density profile where less material is exposed to high temperatures thus complex organic molecules would be associated with lower column densities finally ophirs67 is a promising candidate for the detection of both circumstellar disks with higherangularresolution observations | [['abridged', 'astronomers', 'recently', 'started', 'discovering', 'exoplanets', 'around', 'binary', 'systems', 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1,802.09287 | Gender Aware Spoken Language Translation Applied to English-Arabic | Spoken Language Translation (SLT) is becoming more widely used and becoming a
communication tool that helps in crossing language barriers. One of the
challenges of SLT is the translation from a language without gender agreement
to a language with gender agreement such as English to Arabic. In this paper,
we introduce an approach to tackle such limitation by enabling a Neural Machine
Translation system to produce gender-aware translation. We show that NMT system
can model the speaker/listener gender information to produce gender-aware
translation. We propose a method to generate data used in adapting a NMT system
to produce gender-aware. The proposed approach can achieve significant
improvement of the translation quality by 2 BLEU points.
| cs.CL | spoken language translation slt is becoming more widely used and becoming a communication tool that helps in crossing language barriers one of the challenges of slt is the translation from a language without gender agreement to a language with gender agreement such as english to arabic in this paper we introduce an approach to tackle such limitation by enabling a neural machine translation system to produce genderaware translation we show that nmt system can model the speakerlistener gender information to produce genderaware translation we propose a method to generate data used in adapting a nmt system to produce genderaware the proposed approach can achieve significant improvement of the translation quality by 2 bleu points | [['spoken', 'language', 'translation', 'slt', 'is', 'becoming', 'more', 'widely', 'used', 'and', 'becoming', 'a', 'communication', 'tool', 'that', 'helps', 'in', 'crossing', 'language', 'barriers', 'one', 'of', 'the', 'challenges', 'of', 'slt', 'is', 'the', 'translation', 'from', 'a', 'language', 'without', 'gender', 'agreement', 'to', 'a', 'language', 'with', 'gender', 'agreement', 'such', 'as', 'english', 'to', 'arabic', 'in', 'this', 'paper', 'we', 'introduce', 'an', 'approach', 'to', 'tackle', 'such', 'limitation', 'by', 'enabling', 'a', 'neural', 'machine', 'translation', 'system', 'to', 'produce', 'genderaware', 'translation', 'we', 'show', 'that', 'nmt', 'system', 'can', 'model', 'the', 'speakerlistener', 'gender', 'information', 'to', 'produce', 'genderaware', 'translation', 'we', 'propose', 'a', 'method', 'to', 'generate', 'data', 'used', 'in', 'adapting', 'a', 'nmt', 'system', 'to', 'produce', 'genderaware', 'the', 'proposed', 'approach', 'can', 'achieve', 'significant', 'improvement', 'of', 'the', 'translation', 'quality', 'by', '2', 'bleu', 'points']] | [-0.05409903774801805, 0.021333801267150863, -0.08189884397577037, 0.11452738474748146, -0.12575244635604976, -0.1903257013886775, 0.05103680204800248, 0.4287645672366284, -0.2920896497089416, -0.3605391564043729, 0.012277428654079702, -0.287176558384345, -0.1457023331568691, 0.24789183324390793, -0.19122784942176127, 0.10523519180551694, 0.13522742045716496, 0.05958497207080782, -0.05035918834619224, -0.2530707993969452, 0.28107103756874013, 0.013324015675798842, 0.37365086914219875, 0.0070491188140422625, 0.11229250149642069, -0.06703518227910982, 0.02435160029614181, -0.05456129912891539, -0.047908122171959305, 0.221525241388008, 0.3492931243228285, 0.2027148904703688, 0.32045065969424813, -0.35360543204373435, -0.18041330746072753, 0.07286904016999822, 0.1694725844192139, 0.1667312183968821, -0.05117543396530285, -0.31997644422543153, 0.09956134121411626, -0.23407964522770622, 0.0014052194310352206, -0.1503291235043945, -0.029185613711250193, -0.07171404309593256, -0.25318559195862655, 0.011852577483902374, 0.17439509111276844, 0.1536077579336339, -0.015091862954330026, -0.05009915335859548, 0.025056907727399415, 0.1783842144109178, 0.08311535360336532, 0.18371522714069374, 0.07277460211250734, -0.13780140542382324, -0.18432330705323502, 0.4443134257892604, -0.11462930294178557, -0.2747088463307081, 0.19374960876609149, -0.018641184537524457, -0.16627715731840254, 0.034666365128941834, 0.2329695421646823, -0.006434561161879907, -0.18110675295292025, 0.00461583714799449, -0.006362300627587135, 0.28345426335407975, 0.08792293726940427, -0.052447562009068575, 0.18924583318202118, 0.2580498428688499, -0.00832753534951623, 0.15934699237052546, -0.08527854234061874, -0.04682748321149694, -0.16064588282780165, -0.16005471105311522, -0.12828873702847773, -0.018523272833574498, -0.012219652986810584, -0.14020556792731217, 0.38237037173913496, 0.24803397186884754, 0.15201451618371434, 0.13144047214371854, 0.30292634770739824, 0.041469216549956944, 0.14144806624716966, 0.09035488678215954, 0.12407098141940016, -0.032906312695622705, 0.16597878926787465, -0.1592395742558629, 0.0950931846940269, 0.04602729605118695] |
1,802.09288 | Statistics of "Cold" Early Impulsive Solar Flares in X-ray and Microwave
domains | Solar flares often happen after a preflare / preheating phase, which is
almost or entirely thermal. In contrast, there are the so-called early
impulsive flares that do not show a (significant) preflare heating but instead
often show the Neupert effect--a relationship where the impulsive phase is
followed by a gradual, cumulative-like, thermal response. This has been
interpreted as a dominance of nonthermal energy release at the impulsive phase,
even though a similar phenomenology is expected if the thermal and nonthermal
energies are released in comparable amounts at the impulsive phase.
Nevertheless, some flares do show a good quantitative correspondence between
the nonthermal electron energy input and plasma heating, in such cases the
thermal response was weak, which results in calling them "cold" flares. We
undertook a systematic search of such events among early impulsive flares
registered by Konus-Wind instrument in the triggered mode from 11/1994 to
04/2017 and selected 27 cold flares based on relationships between HXR
(Konus-Wind) and SXR (GOES) emission. For these events we put together all
available microwave data from different instruments. We obtained temporal and
spectral parameters of HXR and microwave emissions of the events and examined
correlations between them. We found that, compared with a `mean' flare, the
cold flares: (i) are weaker, shorter, and harder in the X-ray domain, (ii) are
harder and shorter, but not weaker in the microwaves, (iii) have a
significantly higher spectral peak frequencies in the microwaves. We discuss
the possible physical reasons for these distinctions and implication of the
finding.
| astro-ph.SR | solar flares often happen after a preflare preheating phase which is almost or entirely thermal in contrast there are the socalled early impulsive flares that do not show a significant preflare heating but instead often show the neupert effecta relationship where the impulsive phase is followed by a gradual cumulativelike thermal response this has been interpreted as a dominance of nonthermal energy release at the impulsive phase even though a similar phenomenology is expected if the thermal and nonthermal energies are released in comparable amounts at the impulsive phase nevertheless some flares do show a good quantitative correspondence between the nonthermal electron energy input and plasma heating in such cases the thermal response was weak which results in calling them cold flares we undertook a systematic search of such events among early impulsive flares registered by konuswind instrument in the triggered mode from 111994 to 042017 and selected 27 cold flares based on relationships between hxr konuswind and sxr goes emission for these events we put together all available microwave data from different instruments we obtained temporal and spectral parameters of hxr and microwave emissions of the events and examined correlations between them we found that compared with a mean flare the cold flares i are weaker shorter and harder in the xray domain ii are harder and shorter but not weaker in the microwaves iii have a significantly higher spectral peak frequencies in the microwaves we discuss the possible physical reasons for these distinctions and implication of the finding | [['solar', 'flares', 'often', 'happen', 'after', 'a', 'preflare', 'preheating', 'phase', 'which', 'is', 'almost', 'or', 'entirely', 'thermal', 'in', 'contrast', 'there', 'are', 'the', 'socalled', 'early', 'impulsive', 'flares', 'that', 'do', 'not', 'show', 'a', 'significant', 'preflare', 'heating', 'but', 'instead', 'often', 'show', 'the', 'neupert', 'effecta', 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1,802.09289 | Word images in symmetric and classical groups of Lie type are dense | Let $w\in\mathbf F_k$ be a non-trivial word and denote by $w(G)\subseteq G$
the image of the associated word map $w\colon G^k\to G$. Let $G$ be one of the
finite groups ${\rm S}_n,{\rm GL}_n(q),{\rm Sp}_{2m}(q),{\rm
GO}_{2m}^\pm(q),{\rm GO}_{2m+1}(q),{\rm GU}_n(q)$ ($q$ a prime power, $n\geq
2$, $m\geq 1$), or the unitary group ${\rm U}_n$ over $\mathbb C$. Let $d_G$ be
the normalized Hamming distance resp. the normalized rank metric on $G$ when
$G$ is a symmetric group resp. one of the other classical groups and write
$n(G)$ for the permutation resp. Lie rank of $G$. For $\varepsilon>0$, we prove
that there exists an integer $N(\varepsilon,w)$ such that $w(G)$ is
$\varepsilon$-dense in $G$ with respect to the metric $d_G$ if $n(G)\geq
N(\varepsilon,w)$. This confirms metric versions of a conjectures by Shalev and
Larsen. Equivalently, we prove that any non-trivial word map is surjective on a
metric ultraproduct of groups $G$ from above such that $n(G)\to\infty$ along
the ultrafilter. As a consequence of our methods, we also obtain an alternative
proof of the result of Hui-Larsen-Shalev that $w_1({\rm SU}_n)w_2({\rm
SU}_n)={\rm SU}_n$ for non-trivial words $w_1,w_2\in\mathbf F_k$ and $n$
sufficiently large.
| math.GR | let winmathbf f_k be a nontrivial word and denote by wgsubseteq g the image of the associated word map wcolon gkto g let g be one of the finite groups rm s_nrm gl_nqrm sp_2mqrm go_2mpmqrm go_2m1qrm gu_nq q a prime power ngeq 2 mgeq 1 or the unitary group rm u_n over mathbb c let d_g be the normalized hamming distance resp the normalized rank metric on g when g is a symmetric group resp one of the other classical groups and write ng for the permutation resp lie rank of g for varepsilon0 we prove that there exists an integer nvarepsilonw such that wg is varepsilondense in g with respect to the metric d_g if nggeq nvarepsilonw this confirms metric versions of a conjectures by shalev and larsen equivalently we prove that any nontrivial word map is surjective on a metric ultraproduct of groups g from above such that ngtoinfty along the ultrafilter as a consequence of our methods we also obtain an alternative proof of the result of huilarsenshalev that w_1rm su_nw_2rm su_nrm su_n for nontrivial words w_1w_2inmathbf f_k and n sufficiently large | [['let', 'winmathbf', 'f_k', 'be', 'a', 'nontrivial', 'word', 'and', 'denote', 'by', 'wgsubseteq', 'g', 'the', 'image', 'of', 'the', 'associated', 'word', 'map', 'wcolon', 'gkto', 'g', 'let', 'g', 'be', 'one', 'of', 'the', 'finite', 'groups', 'rm', 's_nrm', 'gl_nqrm', 'sp_2mqrm', 'go_2mpmqrm', 'go_2m1qrm', 'gu_nq', 'q', 'a', 'prime', 'power', 'ngeq', '2', 'mgeq', '1', 'or', 'the', 'unitary', 'group', 'rm', 'u_n', 'over', 'mathbb', 'c', 'let', 'd_g', 'be', 'the', 'normalized', 'hamming', 'distance', 'resp', 'the', 'normalized', 'rank', 'metric', 'on', 'g', 'when', 'g', 'is', 'a', 'symmetric', 'group', 'resp', 'one', 'of', 'the', 'other', 'classical', 'groups', 'and', 'write', 'ng', 'for', 'the', 'permutation', 'resp', 'lie', 'rank', 'of', 'g', 'for', 'varepsilon0', 'we', 'prove', 'that', 'there', 'exists', 'an', 'integer', 'nvarepsilonw', 'such', 'that', 'wg', 'is', 'varepsilondense', 'in', 'g', 'with', 'respect', 'to', 'the', 'metric', 'd_g', 'if', 'nggeq', 'nvarepsilonw', 'this', 'confirms', 'metric', 'versions', 'of', 'a', 'conjectures', 'by', 'shalev', 'and', 'larsen', 'equivalently', 'we', 'prove', 'that', 'any', 'nontrivial', 'word', 'map', 'is', 'surjective', 'on', 'a', 'metric', 'ultraproduct', 'of', 'groups', 'g', 'from', 'above', 'such', 'that', 'ngtoinfty', 'along', 'the', 'ultrafilter', 'as', 'a', 'consequence', 'of', 'our', 'methods', 'we', 'also', 'obtain', 'an', 'alternative', 'proof', 'of', 'the', 'result', 'of', 'huilarsenshalev', 'that', 'w_1rm', 'su_nw_2rm', 'su_nrm', 'su_n', 'for', 'nontrivial', 'words', 'w_1w_2inmathbf', 'f_k', 'and', 'n', 'sufficiently', 'large']] | [-0.19738873898567832, 0.12210414878598341, -0.08174328662802925, 0.017383145685980927, -0.0786624710041895, -0.1725324165827808, 0.02220856325970177, 0.37276795683975655, -0.32825257356491794, -0.21686840767261056, 0.08051695959384453, -0.31106669861243524, -0.10580117977785328, 0.1953919438006362, -0.1081940656112709, -0.05584871898410864, 0.05113511910123459, 0.19849026042698736, -0.08168919445492372, -0.25502625992241124, 0.36295362379744156, -0.08952710292223527, 0.18021887006709375, 0.02597355073346288, 0.12472815082846098, -0.019443968299731433, 0.008522392187480736, 0.009188337074817124, -0.1674691727073286, 0.08621679429604437, 0.2861598142764969, 0.11725571244416466, 0.2649872670236257, -0.2954360180904707, -0.14398326615786114, 0.2687158144320395, 0.1201100534369716, -0.06920607205682311, -0.009476156833761159, -0.2887939091642802, 0.21410895078386888, -0.1583408287148474, -0.09316538008917348, -0.03288906137318721, 0.16271243461741539, -0.012464027332860124, -0.286075494529859, 0.0030822125864874415, 0.1384871199093086, 0.0853101373313511, 0.00554322589648865, -0.16117595523842668, -0.060960755429612136, 0.09181606419842427, -0.01802444073416472, 0.15657485970183757, 0.03624334931654115, -0.05916059142152543, -0.11572987439408225, 0.41786768530349594, -0.1161581256682143, -0.209937297626881, 0.07531531780105398, -0.15753022989774323, -0.15248547217539365, 0.058144976457872664, 0.0986464371230083, 0.14552569417149694, 0.034940166223120274, 0.211169847435562, -0.16422713481742574, 0.15635577766771755, 0.1110502365157457, -0.035037522479128766, 0.11063673853992025, 0.043185205929576004, 0.15357168575367294, 0.10853541707332492, 0.03927818676197329, 0.12847957979741853, -0.3460929183280993, -0.16873638132721724, -0.19317119570830502, 0.17843078603653842, -0.19012423308744342, -0.156202553091178, 0.3341680549208568, 0.05732804660212686, 0.1562574114375229, 0.16979118115100336, 0.1781881950558612, 0.07072828374298132, 0.042595560017956356, 0.1440922474370798, 0.0429134588823261, 0.2291490920252694, -0.1419341015125939, -0.17306917411393025, -0.02400272662459637, 0.19486325666173754] |
1,802.0929 | A novel approach for characterising broadband radio spectral energy
distributions | We present a new broadband radio frequency catalogue across 0.12 GHz $\le \nu
\le$ 20 GHz created by combining data from the Murchison Widefield Array
Commissioning Survey, the Australia Telescope 20 Gigahertz survey, and the
literature. Our catalogue consists of 1285 sources limited by $S_{20\,\rm{GHz}}
>$ 40 mJy at $5\sigma$, and contains flux density measurements (or estimates)
and uncertainties at 0.074, 0.080, 0.119, 0.150, 0.180, 0.408, 0.843, 1.4, 4.8,
8.6, and 20 GHz. We fit a second-order polynomial in log-log space to the
spectral energy distributions of all these sources in order to characterise
their broadband emission. For the 994 sources which are well-described by a
linear or quadratic model we present a new diagnostic plot arranging sources by
the linear and curvature terms. We demonstrate the advantages of such a plot
over the traditional radio colour-colour diagram. We also present astrophysical
descriptions of the sources found in each segment of this new parameter space
and discuss the utility of these plots in the upcoming era of large area, deep,
broadband radio surveys.
| astro-ph.GA astro-ph.IM | we present a new broadband radio frequency catalogue across 012 ghz le nu le 20 ghz created by combining data from the murchison widefield array commissioning survey the australia telescope 20 gigahertz survey and the literature our catalogue consists of 1285 sources limited by s_20rmghz 40 mjy at 5sigma and contains flux density measurements or estimates and uncertainties at 0074 0080 0119 0150 0180 0408 0843 14 48 86 and 20 ghz we fit a secondorder polynomial in loglog space to the spectral energy distributions of all these sources in order to characterise their broadband emission for the 994 sources which are welldescribed by a linear or quadratic model we present a new diagnostic plot arranging sources by the linear and curvature terms we demonstrate the advantages of such a plot over the traditional radio colourcolour diagram we also present astrophysical descriptions of the sources found in each segment of this new parameter space and discuss the utility of these plots in the upcoming era of large area deep broadband radio surveys | [['we', 'present', 'a', 'new', 'broadband', 'radio', 'frequency', 'catalogue', 'across', '012', 'ghz', 'le', 'nu', 'le', '20', 'ghz', 'created', 'by', 'combining', 'data', 'from', 'the', 'murchison', 'widefield', 'array', 'commissioning', 'survey', 'the', 'australia', 'telescope', '20', 'gigahertz', 'survey', 'and', 'the', 'literature', 'our', 'catalogue', 'consists', 'of', '1285', 'sources', 'limited', 'by', 's_20rmghz', '40', 'mjy', 'at', '5sigma', 'and', 'contains', 'flux', 'density', 'measurements', 'or', 'estimates', 'and', 'uncertainties', 'at', '0074', '0080', '0119', '0150', '0180', '0408', '0843', '14', '48', '86', 'and', '20', 'ghz', 'we', 'fit', 'a', 'secondorder', 'polynomial', 'in', 'loglog', 'space', 'to', 'the', 'spectral', 'energy', 'distributions', 'of', 'all', 'these', 'sources', 'in', 'order', 'to', 'characterise', 'their', 'broadband', 'emission', 'for', 'the', '994', 'sources', 'which', 'are', 'welldescribed', 'by', 'a', 'linear', 'or', 'quadratic', 'model', 'we', 'present', 'a', 'new', 'diagnostic', 'plot', 'arranging', 'sources', 'by', 'the', 'linear', 'and', 'curvature', 'terms', 'we', 'demonstrate', 'the', 'advantages', 'of', 'such', 'a', 'plot', 'over', 'the', 'traditional', 'radio', 'colourcolour', 'diagram', 'we', 'also', 'present', 'astrophysical', 'descriptions', 'of', 'the', 'sources', 'found', 'in', 'each', 'segment', 'of', 'this', 'new', 'parameter', 'space', 'and', 'discuss', 'the', 'utility', 'of', 'these', 'plots', 'in', 'the', 'upcoming', 'era', 'of', 'large', 'area', 'deep', 'broadband', 'radio', 'surveys']] | [-0.08874937530596093, 0.1064884118720132, -0.008686215273643794, 0.059820184797969, -0.07461914417949336, -0.07353141404516798, 0.11092761278898614, 0.40965275435942655, -0.1694389443779201, -0.37803307567499794, 0.11515536042461676, -0.343825150842163, -0.04042181060295443, 0.23241110545397894, -0.003126781676182447, -0.0017753441406860512, 0.03424042189896804, -0.13395385943456656, -0.04611284107144116, -0.19829285041666017, 0.21490792784300683, 0.0841351613105882, 0.2638970809152666, -0.01994712989537688, 0.10922990538988654, -0.06925307146044807, -0.12612107743601703, -0.030313950698150113, -0.16324594700218817, 0.06242533780264053, 0.28776509541206674, 0.13721467531830814, 0.19732067652035787, -0.2893052566954825, -0.1882245224459391, 0.09519140360919807, 0.14178397036593254, 0.0025836740469298604, 0.007253645924709694, -0.3231800221946984, 0.08165955442012075, -0.20084563389485866, -0.14902702855676064, 0.027568966237425108, 0.018650546032739312, 0.0573311804151108, -0.20846290474114884, 0.11669006451473528, -0.05910654230198512, 0.12860060191293907, -0.09616356208374655, -0.18498236114398864, 0.010508632094719125, 0.06223666011519207, -0.09293819543543375, 0.09301485205464043, 0.10502992370519897, -0.11112272851587796, -0.07142350857611746, 0.332601504095378, -0.10150582364376373, -0.024246184699978048, 0.12473923386801687, -0.21310763278899833, -0.19547897448480042, 0.1560544656189322, 0.17370198756845787, 0.07505105137219108, -0.17109207518341576, 0.04577495555913522, 0.027903393351429343, 0.24615838621574188, 0.07075135554432084, 0.0757013278392454, 0.25795497630357916, 0.11353823806537719, 0.043247622894586134, 0.14350421564539143, -0.2785730824396853, 0.014804024290162743, -0.3127399930942869, -0.06281460784321204, -0.14020808740472693, 0.08318801517040082, -0.13647658375383911, -0.08901604066677092, 0.41580675644473286, 0.10812711270596854, 0.1631641092993406, 0.09455024793846886, 0.3005768752272911, 0.057003828178143555, 0.07576894758361778, 0.09445560029952933, 0.28572987759082813, 0.09455034687940837, 0.12816034043983868, -0.12255606573069609, -0.046195315248850316, -0.05542765965832299] |
1,802.09291 | The vertical force in the Solar Neighbourhood using red clump stars in
TGASxRAVE - Constraints on the local dark matter density | We investigate the kinematics of red clump stars in the Solar Neighbourhood
by combining data from TGAS and RAVE to constrain the local dark matter
density. After calibrating the absolute magnitude of red clump stars, we
characterize their velocity distribution over a radial distance range of
$6$-$10$ kpc and up to $1.5$ kpc away from the Galactic plane. We then apply
the axisymmetric Jeans equations on subsets representing the thin and thick
disks to determine the (local) distribution of mass near the disk of our
Galaxy. Our kinematic maps are well-behaved permitting a straightforward local
determination of the vertical force, which we find to be $K_z^{\rm thin} =
-2454 \pm 619$ and $K_z^{\rm thick} = -2141 \pm 774$ $(\mathrm{km/s})^2 \!
/\mathrm{kpc}$ at $1.5$ kpc away from the Galactic plane for the thin and thick
disk samples and for thin and thick disk scale heights of 0.28 kpc and 1.12 kpc
respectively. These measurements can be translated into a local dark matter
density $\rho_\textrm{DM} \sim 0.018 \pm 0.002 M_\odot/\textrm{pc}^3$. The
systematic error on this estimate is much larger than the quoted statistical
error, since even a 10% difference in the scale height of the thin disk leads
to a 30% change in the value of $\rho_\textrm{DM}$, and a nearly equally good
fit to the data.
| astro-ph.GA | we investigate the kinematics of red clump stars in the solar neighbourhood by combining data from tgas and rave to constrain the local dark matter density after calibrating the absolute magnitude of red clump stars we characterize their velocity distribution over a radial distance range of 610 kpc and up to 15 kpc away from the galactic plane we then apply the axisymmetric jeans equations on subsets representing the thin and thick disks to determine the local distribution of mass near the disk of our galaxy our kinematic maps are wellbehaved permitting a straightforward local determination of the vertical force which we find to be k_zrm thin 2454 pm 619 and k_zrm thick 2141 pm 774 mathrmkms2 mathrmkpc at 15 kpc away from the galactic plane for the thin and thick disk samples and for thin and thick disk scale heights of 028 kpc and 112 kpc respectively these measurements can be translated into a local dark matter density rho_textrmdm sim 0018 pm 0002 m_odottextrmpc3 the systematic error on this estimate is much larger than the quoted statistical error since even a 10 difference in the scale height of the thin disk leads to a 30 change in the value of rho_textrmdm and a nearly equally good fit to the data | [['we', 'investigate', 'the', 'kinematics', 'of', 'red', 'clump', 'stars', 'in', 'the', 'solar', 'neighbourhood', 'by', 'combining', 'data', 'from', 'tgas', 'and', 'rave', 'to', 'constrain', 'the', 'local', 'dark', 'matter', 'density', 'after', 'calibrating', 'the', 'absolute', 'magnitude', 'of', 'red', 'clump', 'stars', 'we', 'characterize', 'their', 'velocity', 'distribution', 'over', 'a', 'radial', 'distance', 'range', 'of', '610', 'kpc', 'and', 'up', 'to', '15', 'kpc', 'away', 'from', 'the', 'galactic', 'plane', 'we', 'then', 'apply', 'the', 'axisymmetric', 'jeans', 'equations', 'on', 'subsets', 'representing', 'the', 'thin', 'and', 'thick', 'disks', 'to', 'determine', 'the', 'local', 'distribution', 'of', 'mass', 'near', 'the', 'disk', 'of', 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1,802.09292 | Constructing Category-Specific Models for Monocular Object-SLAM | We present a new paradigm for real-time object-oriented SLAM with a monocular
camera. Contrary to previous approaches, that rely on object-level models, we
construct category-level models from CAD collections which are now widely
available. To alleviate the need for huge amounts of labeled data, we develop a
rendering pipeline that enables synthesis of large datasets from a limited
amount of manually labeled data. Using data thus synthesized, we learn
category-level models for object deformations in 3D, as well as discriminative
object features in 2D. These category models are instance-independent and aid
in the design of object landmark observations that can be incorporated into a
generic monocular SLAM framework. Where typical object-SLAM approaches usually
solve only for object and camera poses, we also estimate object shape
on-the-fly, allowing for a wide range of objects from the category to be
present in the scene. Moreover, since our 2D object features are learned
discriminatively, the proposed object-SLAM system succeeds in several scenarios
where sparse feature-based monocular SLAM fails due to insufficient features or
parallax. Also, the proposed category-models help in object instance retrieval,
useful for Augmented Reality (AR) applications. We evaluate the proposed
framework on multiple challenging real-world scenes and show --- to the best of
our knowledge --- first results of an instance-independent monocular
object-SLAM system and the benefits it enjoys over feature-based SLAM methods.
| cs.RO cs.CV | we present a new paradigm for realtime objectoriented slam with a monocular camera contrary to previous approaches that rely on objectlevel models we construct categorylevel models from cad collections which are now widely available to alleviate the need for huge amounts of labeled data we develop a rendering pipeline that enables synthesis of large datasets from a limited amount of manually labeled data using data thus synthesized we learn categorylevel models for object deformations in 3d as well as discriminative object features in 2d these category models are instanceindependent and aid in the design of object landmark observations that can be incorporated into a generic monocular slam framework where typical objectslam approaches usually solve only for object and camera poses we also estimate object shape onthefly allowing for a wide range of objects from the category to be present in the scene moreover since our 2d object features are learned discriminatively the proposed objectslam system succeeds in several scenarios where sparse featurebased monocular slam fails due to insufficient features or parallax also the proposed categorymodels help in object instance retrieval useful for augmented reality ar applications we evaluate the proposed framework on multiple challenging realworld scenes and show to the best of our knowledge first results of an instanceindependent monocular objectslam system and the benefits it enjoys over featurebased slam methods | [['we', 'present', 'a', 'new', 'paradigm', 'for', 'realtime', 'objectoriented', 'slam', 'with', 'a', 'monocular', 'camera', 'contrary', 'to', 'previous', 'approaches', 'that', 'rely', 'on', 'objectlevel', 'models', 'we', 'construct', 'categorylevel', 'models', 'from', 'cad', 'collections', 'which', 'are', 'now', 'widely', 'available', 'to', 'alleviate', 'the', 'need', 'for', 'huge', 'amounts', 'of', 'labeled', 'data', 'we', 'develop', 'a', 'rendering', 'pipeline', 'that', 'enables', 'synthesis', 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1,802.09293 | Singularities in large deviations of work in quantum quenches | We investigate large deviations of the work performed in a quantum quench
across two different phases separated by a quantum critical point, using as
example the Dicke model quenched from its superradiant to its normal phase. We
extract the distribution of the work from the Loschmidt amplitude and compute
for both the corresponding large-deviation forms. Comparing these findings with
the predictions of the classification scheme put forward in [Phys. Rev. Lett.
109, 250602 (2012)], we are able to identify a regime which is in fact distinct
to the ones identified so far: here the rate function exhibits a non-analytical
point which is a strong indication of the existence of an out-of-equilibrium
phase transition in the rare fluctuations of the work.
| cond-mat.stat-mech | we investigate large deviations of the work performed in a quantum quench across two different phases separated by a quantum critical point using as example the dicke model quenched from its superradiant to its normal phase we extract the distribution of the work from the loschmidt amplitude and compute for both the corresponding largedeviation forms comparing these findings with the predictions of the classification scheme put forward in phys rev lett 109 250602 2012 we are able to identify a regime which is in fact distinct to the ones identified so far here the rate function exhibits a nonanalytical point which is a strong indication of the existence of an outofequilibrium phase transition in the rare fluctuations of the work | [['we', 'investigate', 'large', 'deviations', 'of', 'the', 'work', 'performed', 'in', 'a', 'quantum', 'quench', 'across', 'two', 'different', 'phases', 'separated', 'by', 'a', 'quantum', 'critical', 'point', 'using', 'as', 'example', 'the', 'dicke', 'model', 'quenched', 'from', 'its', 'superradiant', 'to', 'its', 'normal', 'phase', 'we', 'extract', 'the', 'distribution', 'of', 'the', 'work', 'from', 'the', 'loschmidt', 'amplitude', 'and', 'compute', 'for', 'both', 'the', 'corresponding', 'largedeviation', 'forms', 'comparing', 'these', 'findings', 'with', 'the', 'predictions', 'of', 'the', 'classification', 'scheme', 'put', 'forward', 'in', 'phys', 'rev', 'lett', '109', '250602', '2012', 'we', 'are', 'able', 'to', 'identify', 'a', 'regime', 'which', 'is', 'in', 'fact', 'distinct', 'to', 'the', 'ones', 'identified', 'so', 'far', 'here', 'the', 'rate', 'function', 'exhibits', 'a', 'nonanalytical', 'point', 'which', 'is', 'a', 'strong', 'indication', 'of', 'the', 'existence', 'of', 'an', 'outofequilibrium', 'phase', 'transition', 'in', 'the', 'rare', 'fluctuations', 'of', 'the', 'work']] | [-0.11934612026670947, 0.14807153733381712, -0.11980647774568448, 0.034881644538836555, 0.009116503918388237, -0.11096132041808839, 0.10823684545272651, 0.309720756940078, -0.22241748814703896, -0.27235672282986345, 0.04104067733666549, -0.294302607808883, -0.17285256446436204, 0.1853286540892441, -0.0057419407996349035, 0.04214573270000983, -0.015063733627903276, 0.0011574076178173223, -0.10315067141782493, -0.1914207541985282, 0.2823414144940519, 0.030443482153350486, 0.30139740377975005, 0.03232665563312669, 0.04876767766739552, -0.03138251216538871, 0.004840892879292369, -0.0016701836730741585, -0.18583683111937715, 0.02709191712589624, 0.21800971337555286, 0.06838743848105272, 0.23624683627858759, -0.38923570786137135, -0.1898119379358832, 0.12974076202566115, 0.11775900752982124, 0.16616596411331558, -0.01778006905806251, -0.33803900668087106, 0.05122437818790786, -0.17966751986338447, -0.14887349895822505, -0.08578521322924644, 0.02997025444249933, -0.009480133582352815, -0.25769920853393463, 0.11560304896362747, 0.05998449038694768, 0.03824626115965657, -0.001427284482633695, -0.040751310523288946, -0.004952671386611958, 0.11347627923823893, 0.04284408038753706, 0.05833622458158061, 0.1193427577505645, -0.1249103255996791, -0.11637910894545106, 0.34868073532513033, -0.07279240186617245, -0.10830290651307829, 0.22580308532924392, -0.1707018087522253, -0.12921897733273605, 0.12867569228789458, 0.1581423675835443, 0.12138178483680045, -0.15551314800977706, 0.05385634714960664, -0.03553345052835842, 0.13212233044372018, 0.03490615531918593, 0.048947948256197076, 0.21856115258027178, 0.14512097119198492, -0.027595682038615146, 0.17195904232406367, -0.13471409040503204, -0.16342116576464225, -0.31952368493657557, -0.13644801082943256, -0.22373351130421118, 0.06451838896221791, -0.03223280984275334, -0.15445583115700476, 0.41906410617433115, 0.18642746461458348, 0.26350260969872275, 0.01670710276205985, 0.22636035047471523, 0.1422294297478705, -0.0023849986435379835, 0.08298368785375108, 0.2943446847222125, 0.13680088691180572, 0.09626872466566662, -0.24095485457607235, 0.03259345718737071, 0.03179726566692504] |
1,802.09294 | Regularity theory for parabolic equations with singular degenerate
coefficients | In this paper, we study parabolic equations in divergence form with
coefficients that are singular degenerate as some Muckenhoupt weight functions
in one spatial variable. Under certain conditions, weighted reverse
H\"{o}lder's inequalities are established. Lipschitz estimates for weak
solutions are proved for homogeneous equations with singular degenerate
coefficients depending only on one spatial variable. These estimates are then
used to establish interior, boundary, and global weighted estimates of
Calder\'{o}n-Zygmund type for weak solutions, assuming that the coefficients
are partially VMO (vanishing mean oscillations) with respect to the considered
weights. The solvability in weighted Sobolev spaces is also achieved. Our
results are new even for elliptic equations, and non-trivially extend known
results for uniformly elliptic and parabolic equations. The results are also
useful in the study of fractional elliptic and parabolic equations with
measurable coefficients.
| math.AP | in this paper we study parabolic equations in divergence form with coefficients that are singular degenerate as some muckenhoupt weight functions in one spatial variable under certain conditions weighted reverse holders inequalities are established lipschitz estimates for weak solutions are proved for homogeneous equations with singular degenerate coefficients depending only on one spatial variable these estimates are then used to establish interior boundary and global weighted estimates of calderonzygmund type for weak solutions assuming that the coefficients are partially vmo vanishing mean oscillations with respect to the considered weights the solvability in weighted sobolev spaces is also achieved our results are new even for elliptic equations and nontrivially extend known results for uniformly elliptic and parabolic equations the results are also useful in the study of fractional elliptic and parabolic equations with measurable coefficients | [['in', 'this', 'paper', 'we', 'study', 'parabolic', 'equations', 'in', 'divergence', 'form', 'with', 'coefficients', 'that', 'are', 'singular', 'degenerate', 'as', 'some', 'muckenhoupt', 'weight', 'functions', 'in', 'one', 'spatial', 'variable', 'under', 'certain', 'conditions', 'weighted', 'reverse', 'holders', 'inequalities', 'are', 'established', 'lipschitz', 'estimates', 'for', 'weak', 'solutions', 'are', 'proved', 'for', 'homogeneous', 'equations', 'with', 'singular', 'degenerate', 'coefficients', 'depending', 'only', 'on', 'one', 'spatial', 'variable', 'these', 'estimates', 'are', 'then', 'used', 'to', 'establish', 'interior', 'boundary', 'and', 'global', 'weighted', 'estimates', 'of', 'calderonzygmund', 'type', 'for', 'weak', 'solutions', 'assuming', 'that', 'the', 'coefficients', 'are', 'partially', 'vmo', 'vanishing', 'mean', 'oscillations', 'with', 'respect', 'to', 'the', 'considered', 'weights', 'the', 'solvability', 'in', 'weighted', 'sobolev', 'spaces', 'is', 'also', 'achieved', 'our', 'results', 'are', 'new', 'even', 'for', 'elliptic', 'equations', 'and', 'nontrivially', 'extend', 'known', 'results', 'for', 'uniformly', 'elliptic', 'and', 'parabolic', 'equations', 'the', 'results', 'are', 'also', 'useful', 'in', 'the', 'study', 'of', 'fractional', 'elliptic', 'and', 'parabolic', 'equations', 'with', 'measurable', 'coefficients']] | [-0.11560511187330555, 0.09738161618849124, -0.03516464900058597, 0.10007155195935004, -0.14173930915204613, -0.18654552223716878, -0.05403086822393086, 0.3429851304294903, -0.33495567201066817, -0.16403908561089828, 0.1893788417167058, -0.29594410417962874, -0.09463746947542166, 0.24981157167522766, -0.10305363447891909, 0.11586485362790677, 0.08384011220013195, 0.03557089988642664, -0.12982668885926424, -0.2870207403077563, 0.4211533091156118, -0.0985960400656366, 0.2051892975560709, 0.029730440097002646, 0.08241030105034328, -0.027563923160170218, -0.049705286531139224, 0.01575915328289535, -0.2065753845509694, 0.13627309473266186, 0.27591681939118834, -0.04207631308453352, 0.28580203290430156, -0.399123906369891, -0.20897081779983284, 0.15244039521403194, 0.10191220374875215, 0.025377354695837, -0.01860616815974936, -0.28141803044214175, 0.12008694090894353, -0.05247976345274208, -0.23494098945034306, -0.10337951903078538, -0.04081090807622827, 0.1621002745762495, -0.3691004800902151, 0.16283277484002773, 0.08042986211045507, 0.02973921982130147, -0.19161212768878289, -0.1419465302614801, -0.024927366384193857, 0.05494537719337742, 0.046877509796185726, -0.022086188551594516, -0.0018357782061698277, -0.10629769907256505, -0.08040695624085449, 0.3027953075787136, -0.1229735273145028, -0.33549883639884753, 0.11722525558086919, -0.18483923303324784, -0.13836894246554976, 0.0808628344675526, 0.16279478026067476, 0.17649653342677585, -0.150072911691699, 0.09893909792950961, -0.09079360004093971, 0.08288282150522773, 0.12144843595616742, 0.05336402411530934, 0.04256437673692161, 0.01996444035738484, 0.17685609395657456, 0.09470852152896184, 0.028346141393265144, -0.12066624643856229, -0.37560095674872623, -0.12482608290416981, -0.11998146421401136, 0.07148825302164057, -0.15488707425321258, -0.1964126316927818, 0.335843305698589, 0.0751028640557136, 0.163190967867276, 0.0916239881519673, 0.1658308648351413, 0.20671716450588473, 0.017620429933529847, 0.08069450690592604, 0.2168981278197468, 0.20354991276581674, 0.11975875779649299, -0.1529223458553011, 0.07277117972544554, 0.20617319039180318] |
1,802.09295 | Gravitational birefringence and an exotic formula for redshift | We compute the birefringence of light in curved Robertson-Walker spacetimes
and propose an exotic formula for redshift based on the internal structure of
the spinning photon. We then use the Hubble diagram of supernovae to test this
formula.
| astro-ph.CO gr-qc | we compute the birefringence of light in curved robertsonwalker spacetimes and propose an exotic formula for redshift based on the internal structure of the spinning photon we then use the hubble diagram of supernovae to test this formula | [['we', 'compute', 'the', 'birefringence', 'of', 'light', 'in', 'curved', 'robertsonwalker', 'spacetimes', 'and', 'propose', 'an', 'exotic', 'formula', 'for', 'redshift', 'based', 'on', 'the', 'internal', 'structure', 'of', 'the', 'spinning', 'photon', 'we', 'then', 'use', 'the', 'hubble', 'diagram', 'of', 'supernovae', 'to', 'test', 'this', 'formula']] | [-0.08885723647759541, 0.14217611023961677, -0.15012778444705824, 0.11555244642199557, -0.19742748842231536, -0.1067907307787161, 0.011718561468449863, 0.39728322370271935, -0.14491725813499406, -0.25556716722387235, 0.011133541870788721, -0.2350668719920673, -0.11180993236944471, 0.21183199876625286, -0.061284162968245494, 0.003861990524455905, -0.012356261722743511, -0.007218077889104423, -0.1141601779071559, -0.25115548049124253, 0.4033979900965565, 0.06609133542760422, 0.26596292422006007, -0.013622303811931297, 0.17519627759037049, 0.0005698305352492944, -0.05876236673640577, -0.012658840339434775, -0.24853884943417812, 0.10968361211646545, 0.14028690431855226, 0.14939338722462325, 0.11088263881270234, -0.3820806330952205, -0.18189513190698467, 0.10941894881819424, 0.16931144471623397, 0.1829838876636993, -0.04982831088005026, -0.3093052303516551, 0.006708548796412192, -0.20648660466663146, -0.19491214069880938, -0.04607889781657018, 0.017910265902939596, -0.023730324287163585, -0.16385333950318837, 0.10120625350330222, -0.0024311267525741927, 0.01107752318248937, -0.11929512261658122, 0.011589101203227122, 0.007230587401672413, 0.025723013965609044, 0.06258888126007821, 0.003428616965385644, 0.08470581660635378, -0.15135681525632544, -0.10485213677594929, 0.3995259439474658, -0.11614298827848152, -0.15218175173197923, 0.05327120869984164, -0.1891519918939785, -0.12057066148784208, 0.06599704107563746, 0.21961391048113765, 0.20312428395999105, -0.12792176648049222, 0.11534257794234068, 0.011542419713039539, 0.14743308575921937, 0.1021174012781366, 0.04566806611163836, 0.24970914977357575, 0.11527424290972321, -0.00988808992367826, 0.18471011639523663, -0.16736862032159575, -0.008214788969397839, -0.3843612194453415, -0.22668819738502957, -0.15376274571999124, 0.14102010336998655, -0.21779283980408523, -0.2584526532231585, 0.3409325844167094, 0.1250032069847772, 0.1607887903718572, 0.032031908435256856, 0.30149563588202, 0.057309047049401624, 0.029801982847091398, 0.07576472888161477, 0.3006262769677529, 0.1664076912657995, 0.07775930644895293, -0.22942093104173086, -0.03400029939305233, 0.1140084876678884] |
1,802.09296 | AMUSE: Multilingual Semantic Parsing for Question Answering over Linked
Data | The task of answering natural language questions over RDF data has received
wide interest in recent years, in particular in the context of the series of
QALD benchmarks. The task consists of mapping a natural language question to an
executable form, e.g. SPARQL, so that answers from a given KB can be extracted.
So far, most systems proposed are i) monolingual and ii) rely on a set of
hard-coded rules to interpret questions and map them into a SPARQL query. We
present the first multilingual QALD pipeline that induces a model from training
data for mapping a natural language question into logical form as probabilistic
inference. In particular, our approach learns to map universal syntactic
dependency representations to a language-independent logical form based on
DUDES (Dependency-based Underspecified Discourse Representation Structures)
that are then mapped to a SPARQL query as a deterministic second step. Our
model builds on factor graphs that rely on features extracted from the
dependency graph and corresponding semantic representations. We rely on
approximate inference techniques, Markov Chain Monte Carlo methods in
particular, as well as Sample Rank to update parameters using a ranking
objective. Our focus lies on developing methods that overcome the lexical gap
and present a novel combination of machine translation and word embedding
approaches for this purpose. As a proof of concept for our approach, we
evaluate our approach on the QALD-6 datasets for English, German & Spanish.
| cs.AI cs.CL | the task of answering natural language questions over rdf data has received wide interest in recent years in particular in the context of the series of qald benchmarks the task consists of mapping a natural language question to an executable form eg sparql so that answers from a given kb can be extracted so far most systems proposed are i monolingual and ii rely on a set of hardcoded rules to interpret questions and map them into a sparql query we present the first multilingual qald pipeline that induces a model from training data for mapping a natural language question into logical form as probabilistic inference in particular our approach learns to map universal syntactic dependency representations to a languageindependent logical form based on dudes dependencybased underspecified discourse representation structures that are then mapped to a sparql query as a deterministic second step our model builds on factor graphs that rely on features extracted from the dependency graph and corresponding semantic representations we rely on approximate inference techniques markov chain monte carlo methods in particular as well as sample rank to update parameters using a ranking objective our focus lies on developing methods that overcome the lexical gap and present a novel combination of machine translation and word embedding approaches for this purpose as a proof of concept for our approach we evaluate our approach on the qald6 datasets for english german spanish | [['the', 'task', 'of', 'answering', 'natural', 'language', 'questions', 'over', 'rdf', 'data', 'has', 'received', 'wide', 'interest', 'in', 'recent', 'years', 'in', 'particular', 'in', 'the', 'context', 'of', 'the', 'series', 'of', 'qald', 'benchmarks', 'the', 'task', 'consists', 'of', 'mapping', 'a', 'natural', 'language', 'question', 'to', 'an', 'executable', 'form', 'eg', 'sparql', 'so', 'that', 'answers', 'from', 'a', 'given', 'kb', 'can', 'be', 'extracted', 'so', 'far', 'most', 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1,802.09297 | R-Matrix parametrization for {\gamma} decays to unbound states | R-matrix theory was originally developed to describe nuclear reactions. The
framework was further extended to describe {\beta} decay to unbound states.
However, at the time writing, no clear description of {\gamma} decays to
unbound states exist. Such a description will be presented in this note.
| nucl-th | rmatrix theory was originally developed to describe nuclear reactions the framework was further extended to describe beta decay to unbound states however at the time writing no clear description of gamma decays to unbound states exist such a description will be presented in this note | [['rmatrix', 'theory', 'was', 'originally', 'developed', 'to', 'describe', 'nuclear', 'reactions', 'the', 'framework', 'was', 'further', 'extended', 'to', 'describe', 'beta', 'decay', 'to', 'unbound', 'states', 'however', 'at', 'the', 'time', 'writing', 'no', 'clear', 'description', 'of', 'gamma', 'decays', 'to', 'unbound', 'states', 'exist', 'such', 'a', 'description', 'will', 'be', 'presented', 'in', 'this', 'note']] | [-0.04068208527104515, 0.19265610213494963, -0.16459598020753927, 0.16823666483526015, -0.04502237865494357, -0.14384935302659868, 0.019509472015003363, 0.3418108172300789, -0.24448246919071406, -0.26686487673885295, -0.028257393058285944, -0.25360846602254444, -0.06606199000444678, 0.15179509297013283, 0.01437461135081119, 0.034101264882418846, 0.07001189572943581, 0.06789877598898278, -0.0656929899007082, -0.18095569989333551, 0.24956472559521595, 0.11308435760955844, 0.18848815244726008, 0.1061904759456714, -0.006222946465843254, -0.01375497149096595, -0.020667295426958138, -0.0577453076839447, -0.1932169194229775, 0.060311867780466044, 0.3211110644042492, 0.12667779698967935, 0.16958157358070214, -0.4193512881795565, -0.1791021012597614, 0.09792857625418239, 0.1790651932462222, 0.16951642090247737, -0.07442457956688789, -0.2973501001795133, 0.06865441884017653, -0.2071361266180045, -0.2082015872001648, -0.12672535396284526, 0.09621391871737109, -0.06044934418104175, -0.23195489885078535, 0.025371979425350823, 0.024918216523817843, 0.0028673355364137224, -0.07163601633575227, -0.12365017150425249, 0.05844055680144164, 0.08118369429268771, 0.04349034906675418, 0.08004301386988825, 0.13629171844157908, -0.04199150742238594, -0.1253983990392751, 0.3471580229699612, -0.011369194090366363, -0.14162282798853185, 0.2211185831990507, -0.14267917446688647, -0.18417275144408146, 0.19739700406789779, 0.1616342182064222, 0.09750569257885218, -0.2034197337925434, 0.10908597664286693, -0.018454268781675234, 0.19598438578347366, 0.10730496047892504, 0.006887167203240096, 0.13332959512869516, 0.14029628557877408, -0.04804121206204096, 0.08240385566475905, -0.03453852397700151, -0.09963672566745016, -0.34157040235069064, -0.1795990327347277, -0.11403216586137811, 0.07879672096007401, 0.13121266536828544, -0.14210637927883202, 0.37291677294092046, 0.05613053275479211, 0.15898163956072595, -0.030744743812829257, 0.21697082648881608, 0.12590749014375938, 0.07399600417249733, 0.07138225088516871, 0.28141184519562457, 0.18787529526485336, 0.049218880840473704, -0.22026472804524624, 0.03988370397645566, 0.05818908296318518] |
1,802.09298 | Beyond Pixels: Leveraging Geometry and Shape Cues for Online
Multi-Object Tracking | This paper introduces geometry and object shape and pose costs for
multi-object tracking in urban driving scenarios. Using images from a monocular
camera alone, we devise pairwise costs for object tracks, based on several 3D
cues such as object pose, shape, and motion. The proposed costs are agnostic to
the data association method and can be incorporated into any optimization
framework to output the pairwise data associations. These costs are easy to
implement, can be computed in real-time, and complement each other to account
for possible errors in a tracking-by-detection framework. We perform an
extensive analysis of the designed costs and empirically demonstrate consistent
improvement over the state-of-the-art under varying conditions that employ a
range of object detectors, exhibit a variety in camera and object motions, and,
more importantly, are not reliant on the choice of the association framework.
We also show that, by using the simplest of associations frameworks (two-frame
Hungarian assignment), we surpass the state-of-the-art in multi-object-tracking
on road scenes. More qualitative and quantitative results can be found at the
following URL: https://junaidcs032.github.io/Geometry_ObjectShape_MOT/.
| cs.RO cs.CV | this paper introduces geometry and object shape and pose costs for multiobject tracking in urban driving scenarios using images from a monocular camera alone we devise pairwise costs for object tracks based on several 3d cues such as object pose shape and motion the proposed costs are agnostic to the data association method and can be incorporated into any optimization framework to output the pairwise data associations these costs are easy to implement can be computed in realtime and complement each other to account for possible errors in a trackingbydetection framework we perform an extensive analysis of the designed costs and empirically demonstrate consistent improvement over the stateoftheart under varying conditions that employ a range of object detectors exhibit a variety in camera and object motions and more importantly are not reliant on the choice of the association framework we also show that by using the simplest of associations frameworks twoframe hungarian assignment we surpass the stateoftheart in multiobjecttracking on road scenes more qualitative and quantitative results can be found at the following url httpsjunaidcs032githubiogeometry_objectshape_mot | [['this', 'paper', 'introduces', 'geometry', 'and', 'object', 'shape', 'and', 'pose', 'costs', 'for', 'multiobject', 'tracking', 'in', 'urban', 'driving', 'scenarios', 'using', 'images', 'from', 'a', 'monocular', 'camera', 'alone', 'we', 'devise', 'pairwise', 'costs', 'for', 'object', 'tracks', 'based', 'on', 'several', '3d', 'cues', 'such', 'as', 'object', 'pose', 'shape', 'and', 'motion', 'the', 'proposed', 'costs', 'are', 'agnostic', 'to', 'the', 'data', 'association', 'method', 'and', 'can', 'be', 'incorporated', 'into', 'any', 'optimization', 'framework', 'to', 'output', 'the', 'pairwise', 'data', 'associations', 'these', 'costs', 'are', 'easy', 'to', 'implement', 'can', 'be', 'computed', 'in', 'realtime', 'and', 'complement', 'each', 'other', 'to', 'account', 'for', 'possible', 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1,802.09299 | Higgs inflation at the hilltop | We study inflation with the non-minimally coupled Standard Model Higgs in the
case when quantum corrections generate a hilltop in the potential. We consider
both the metric and the Palatini formulation of general relativity. We
investigate hilltop inflation in different parts of the Higgs potential and
calculate predictions for CMB observables. We run the renormalization group
equations up from the electroweak scale and down from the hilltop, adding a
jump in-between to account for unknown corrections in the intermediate regime.
Within our approximation, no viable hilltop inflation is possible for small
field values, where the non-minimal coupling has no role, nor for intermediate
field values. For large field values, hilltop inflation works. We find the
spectral index to be $n_s\leq0.96$ in both the metric and the Palatini
formulation, the upper bound coinciding with the tree-level result. The
tensor-to-scalar ratio is $r\leq1.2\times10^{-3}$ in the metric case and
$r\leq2.2\times10^{-9}$ in the Palatini case. Successful inflation is possible
even when the renormalization group running is continuous with no jumps. In the
metric formulation, $r$ is smaller than in Higgs inflation on the tree-level
plateau or at the critical point, making it possible to distinguish hilltop
inflation from these scenarios with next-generation CMB experiments.
| astro-ph.CO gr-qc hep-ph hep-th | we study inflation with the nonminimally coupled standard model higgs in the case when quantum corrections generate a hilltop in the potential we consider both the metric and the palatini formulation of general relativity we investigate hilltop inflation in different parts of the higgs potential and calculate predictions for cmb observables we run the renormalization group equations up from the electroweak scale and down from the hilltop adding a jump inbetween to account for unknown corrections in the intermediate regime within our approximation no viable hilltop inflation is possible for small field values where the nonminimal coupling has no role nor for intermediate field values for large field values hilltop inflation works we find the spectral index to be n_sleq096 in both the metric and the palatini formulation the upper bound coinciding with the treelevel result the tensortoscalar ratio is rleq12times103 in the metric case and rleq22times109 in the palatini case successful inflation is possible even when the renormalization group running is continuous with no jumps in the metric formulation r is smaller than in higgs inflation on the treelevel plateau or at the critical point making it possible to distinguish hilltop inflation from these scenarios with nextgeneration cmb experiments | [['we', 'study', 'inflation', 'with', 'the', 'nonminimally', 'coupled', 'standard', 'model', 'higgs', 'in', 'the', 'case', 'when', 'quantum', 'corrections', 'generate', 'a', 'hilltop', 'in', 'the', 'potential', 'we', 'consider', 'both', 'the', 'metric', 'and', 'the', 'palatini', 'formulation', 'of', 'general', 'relativity', 'we', 'investigate', 'hilltop', 'inflation', 'in', 'different', 'parts', 'of', 'the', 'higgs', 'potential', 'and', 'calculate', 'predictions', 'for', 'cmb', 'observables', 'we', 'run', 'the', 'renormalization', 'group', 'equations', 'up', 'from', 'the', 'electroweak', 'scale', 'and', 'down', 'from', 'the', 'hilltop', 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'smaller', 'than', 'in', 'higgs', 'inflation', 'on', 'the', 'treelevel', 'plateau', 'or', 'at', 'the', 'critical', 'point', 'making', 'it', 'possible', 'to', 'distinguish', 'hilltop', 'inflation', 'from', 'these', 'scenarios', 'with', 'nextgeneration', 'cmb', 'experiments']] | [-0.12920860153372365, 0.17866444133805953, -0.08209367503700447, 0.14874745920822877, -0.08752014351592678, -0.20532928981704798, -0.008386277620855549, 0.31360805005090414, -0.20998508559402815, -0.29367265081609867, 0.06575942357120383, -0.2539924290314846, -0.12436784974176456, 0.14087867597354398, -0.009536391985720864, 0.0171437036989317, 0.029225329244462063, 0.0316288497128765, -0.04775387488824415, -0.26377933379144497, 0.33198334618712666, 0.07668754812578203, 0.21030242823839643, 0.010902755879584303, 0.04785723313996521, -0.05517392287380653, 0.023828798072970458, -0.016525070502087097, -0.15885520070734513, 0.037883859508325755, 0.18922574644634113, 0.084801694645362, 0.21857445307405723, 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1,802.093 | Strong Subadditivity Lower Bound and Quantum Channels | We derive the strong subadditivity of the von Neumann entropy with a strict
lower bound dependent on the distribution of quantum correlation in the system.
We investigate the structure of states saturating the bounded subadditivity and
explore its consequences for the quantum data processing inequality. The
quantum data processing achieves a lower bound associated with the locally
inaccessible information.
| quant-ph | we derive the strong subadditivity of the von neumann entropy with a strict lower bound dependent on the distribution of quantum correlation in the system we investigate the structure of states saturating the bounded subadditivity and explore its consequences for the quantum data processing inequality the quantum data processing achieves a lower bound associated with the locally inaccessible information | [['we', 'derive', 'the', 'strong', 'subadditivity', 'of', 'the', 'von', 'neumann', 'entropy', 'with', 'a', 'strict', 'lower', 'bound', 'dependent', 'on', 'the', 'distribution', 'of', 'quantum', 'correlation', 'in', 'the', 'system', 'we', 'investigate', 'the', 'structure', 'of', 'states', 'saturating', 'the', 'bounded', 'subadditivity', 'and', 'explore', 'its', 'consequences', 'for', 'the', 'quantum', 'data', 'processing', 'inequality', 'the', 'quantum', 'data', 'processing', 'achieves', 'a', 'lower', 'bound', 'associated', 'with', 'the', 'locally', 'inaccessible', 'information']] | [-0.16613347263280617, 0.12343366409383588, -0.11287955279951378, 0.11310082591943822, -0.025628669866187087, -0.1908939974777148, 0.06422015595628675, 0.23381579701662442, -0.28735946857181016, -0.25739205129823445, 0.12252152747261512, -0.3250284659344766, -0.0691462120009681, 0.2119798967812084, -0.04704543455677517, 0.12181047297978648, 0.056143647296575165, 0.12076962679640342, -0.1351150651738616, -0.22376084047511724, 0.35305804197313423, 0.03978092067330381, 0.36411281247717975, 0.13543935738882776, 0.09539950080215931, -0.000327413021665761, 0.006010437999867787, -0.003795746177182359, -0.2268546432319839, 0.20787710836453174, 0.1663630588958829, 0.18575529849661862, 0.2850652261029424, -0.4323661894363872, -0.18093940991340046, 0.11329445560162855, 0.051727013646672336, 0.09765414184874903, -0.058606408783076804, -0.32228081487513827, 0.03810573593413426, -0.15640462755020393, -0.0923614956880525, -0.07236442385020397, -0.011612106288262343, -0.03246804715086848, -0.2587539501363901, 0.16322497680972695, 0.12225456576857527, 0.0705349718110036, -0.07431278626584464, -0.04717637771953655, -0.02589240226642055, 0.11947780519909368, -0.07817716271442882, -0.03454853841537704, 0.11977756006043341, -0.16099230212680363, -0.1291058732313104, 0.2904852259651584, -0.08648581786270616, -0.1983508882349578, 0.1676209438276493, -0.18611304810018106, -0.14346630613998337, 0.01651044332785374, 0.1284209086354506, 0.07467504731237383, -0.07723080688965175, 0.145634890517212, -0.044140747574678924, 0.1500837410784374, 0.05535625933148598, 0.18907685197645135, 0.11902213904817226, 0.08898237123454021, 0.1560334881325647, 0.2648790501121242, -0.07696593558845916, -0.12459194207942839, -0.3181177296880948, -0.1921672325016994, -0.24789049212378844, 0.0864443919005788, -0.13886819809050718, -0.16967831217383933, 0.29242630767778066, 0.10973492441541058, 0.19906664923054435, 0.1113174440875902, 0.26602876852503266, 0.17333878070052902, 0.04394145013953922, 0.11708978322823926, 0.20742417916150416, 0.22599079818228038, 0.08874558654349392, -0.2724244722433515, 0.10063823712673986, 0.04672369186572091] |
1,802.09301 | Dimension-free Information Concentration via Exp-Concavity | Information concentration of probability measures have important implications
in learning theory. Recently, it is discovered that the information content of
a log-concave distribution concentrates around their differential entropy,
albeit with an unpleasant dependence on the ambient dimension. In this work, we
prove that if the potentials of the log-concave distribution are exp-concave,
which is a central notion for fast rates in online and statistical learning,
then the concentration of information can be further improved to depend only on
the exp-concavity parameter, and hence, it can be dimension independent.
Central to our proof is a novel yet simple application of the variance
Brascamp-Lieb inequality. In the context of learning theory, our
concentration-of-information result immediately implies high-probability
results to many of the previous bounds that only hold in expectation.
| cs.LG cs.IT math.IT stat.ML | information concentration of probability measures have important implications in learning theory recently it is discovered that the information content of a logconcave distribution concentrates around their differential entropy albeit with an unpleasant dependence on the ambient dimension in this work we prove that if the potentials of the logconcave distribution are expconcave which is a central notion for fast rates in online and statistical learning then the concentration of information can be further improved to depend only on the expconcavity parameter and hence it can be dimension independent central to our proof is a novel yet simple application of the variance brascamplieb inequality in the context of learning theory our concentrationofinformation result immediately implies highprobability results to many of the previous bounds that only hold in expectation | [['information', 'concentration', 'of', 'probability', 'measures', 'have', 'important', 'implications', 'in', 'learning', 'theory', 'recently', 'it', 'is', 'discovered', 'that', 'the', 'information', 'content', 'of', 'a', 'logconcave', 'distribution', 'concentrates', 'around', 'their', 'differential', 'entropy', 'albeit', 'with', 'an', 'unpleasant', 'dependence', 'on', 'the', 'ambient', 'dimension', 'in', 'this', 'work', 'we', 'prove', 'that', 'if', 'the', 'potentials', 'of', 'the', 'logconcave', 'distribution', 'are', 'expconcave', 'which', 'is', 'a', 'central', 'notion', 'for', 'fast', 'rates', 'in', 'online', 'and', 'statistical', 'learning', 'then', 'the', 'concentration', 'of', 'information', 'can', 'be', 'further', 'improved', 'to', 'depend', 'only', 'on', 'the', 'expconcavity', 'parameter', 'and', 'hence', 'it', 'can', 'be', 'dimension', 'independent', 'central', 'to', 'our', 'proof', 'is', 'a', 'novel', 'yet', 'simple', 'application', 'of', 'the', 'variance', 'brascamplieb', 'inequality', 'in', 'the', 'context', 'of', 'learning', 'theory', 'our', 'concentrationofinformation', 'result', 'immediately', 'implies', 'highprobability', 'results', 'to', 'many', 'of', 'the', 'previous', 'bounds', 'that', 'only', 'hold', 'in', 'expectation']] | [-0.05592051253003615, 0.10327332338703046, -0.15042261290548753, 0.08347668723639337, -0.06984583468043379, -0.13348494554012422, 0.039292581602081, 0.35367248195504386, -0.2659093490034889, -0.2821975822342441, 0.12427045975808083, -0.2662035275457634, -0.1503697778209157, 0.2145178894261046, -0.1403207792050486, 0.039749896860614954, 0.029324321235190073, 0.10267612389436671, -0.06081547849952051, -0.29851529744291116, 0.3179589074552207, 0.062267284732245444, 0.30189537559266366, 0.11256360226414269, 0.07311995651218153, 0.009552094762006568, -0.017811520786453334, 0.0338564456203982, -0.13400369273799626, 0.17332057855165903, 0.24938101313328223, 0.18783591249406786, 0.2975245730005323, -0.3517370862176731, -0.23117065845086934, 0.14315916926670258, 0.1454195615000254, 0.100638259885027, -0.08966736910894277, -0.26743037838466643, 0.08528109744841618, -0.15284373678473961, -0.1290912108878339, -0.08199383815129598, 0.0273242395607725, 0.03415484260398126, -0.29479114758589914, 0.11285256102518548, 0.1325271333464318, 0.02290135516973567, -0.04687575886898216, -0.10772989752761547, 0.003809699938366456, 0.1016208248837511, 0.07907925987623572, 0.04146065430702745, 0.1443944541471345, -0.1269657533220385, -0.08917981220985807, 0.27642548395439037, -0.04833197957533042, -0.2132523135755152, 0.17068765521033794, -0.1591911587627634, -0.20546224211076541, 0.09309008422248538, 0.18983372996398618, 0.13430414386537104, -0.1567736978287853, 0.10820003730219065, -0.07482239850316315, 0.1673030236602894, 0.04524848071695675, 0.07693628611649195, 0.13555112520476714, 0.12710579945558, 0.12426132805107738, 0.10567106718718562, -0.04422871343466261, -0.12143342176614891, -0.27940509330836083, -0.19060899496876768, -0.22844262288454625, 0.049799739440444794, -0.14749931487497792, -0.13316655206209463, 0.33239553222757956, 0.17016416018651354, 0.21375437362474345, 0.0854796337431282, 0.2639924142332304, 0.13544492532743052, 0.05302627278410549, 0.09790868782401381, 0.24195273971510312, 0.14523367309066954, 0.07132831419862452, -0.1287901654769297, 0.13710595356921354, 0.06291393790068844] |
1,802.09302 | Non-trivial topological structure of heat and momentum flux radiated by
magneto-optical nanoparticles | In the present Letter we investigate the heat and momentum fluxes radiated by
a hot magneto-optical nanoparticle in its surrounding under the action of an
external magnetic field. We show that the flux lines circulate in a confined
region at nanometric distance from the particle around the axis of magnetic
field in a vortex-like configuration. Moreover we prove that the spatial
orientation of these vortices (clockwise or counterclockwise) is associated to
the contribution of optical resonances with topological charges m = +1 or m =
-1 to the thermal emission. This work paves the way to a geometric description
of heat and momentum transport in lattices of magneto-optical particles.
Moreover it could have important applications in the field of energy storage as
well as in thermal management at nanoscale.
| cond-mat.mes-hall | in the present letter we investigate the heat and momentum fluxes radiated by a hot magnetooptical nanoparticle in its surrounding under the action of an external magnetic field we show that the flux lines circulate in a confined region at nanometric distance from the particle around the axis of magnetic field in a vortexlike configuration moreover we prove that the spatial orientation of these vortices clockwise or counterclockwise is associated to the contribution of optical resonances with topological charges m 1 or m 1 to the thermal emission this work paves the way to a geometric description of heat and momentum transport in lattices of magnetooptical particles moreover it could have important applications in the field of energy storage as well as in thermal management at nanoscale | [['in', 'the', 'present', 'letter', 'we', 'investigate', 'the', 'heat', 'and', 'momentum', 'fluxes', 'radiated', 'by', 'a', 'hot', 'magnetooptical', 'nanoparticle', 'in', 'its', 'surrounding', 'under', 'the', 'action', 'of', 'an', 'external', 'magnetic', 'field', 'we', 'show', 'that', 'the', 'flux', 'lines', 'circulate', 'in', 'a', 'confined', 'region', 'at', 'nanometric', 'distance', 'from', 'the', 'particle', 'around', 'the', 'axis', 'of', 'magnetic', 'field', 'in', 'a', 'vortexlike', 'configuration', 'moreover', 'we', 'prove', 'that', 'the', 'spatial', 'orientation', 'of', 'these', 'vortices', 'clockwise', 'or', 'counterclockwise', 'is', 'associated', 'to', 'the', 'contribution', 'of', 'optical', 'resonances', 'with', 'topological', 'charges', 'm', '1', 'or', 'm', '1', 'to', 'the', 'thermal', 'emission', 'this', 'work', 'paves', 'the', 'way', 'to', 'a', 'geometric', 'description', 'of', 'heat', 'and', 'momentum', 'transport', 'in', 'lattices', 'of', 'magnetooptical', 'particles', 'moreover', 'it', 'could', 'have', 'important', 'applications', 'in', 'the', 'field', 'of', 'energy', 'storage', 'as', 'well', 'as', 'in', 'thermal', 'management', 'at', 'nanoscale']] | [-0.16843157277009854, 0.19794528788117433, -0.04266168602822921, -0.005991174392108842, -0.03756476902058275, -0.06109733384021917, 0.02001047713726055, 0.4297144513899886, -0.2604799952145343, -0.3196477506999073, 0.03555397836465799, -0.27187085285137486, -0.06618402438150264, 0.17566672841354647, -0.027603955112817498, -0.008154560985982301, -0.014647481406628205, 0.031926341032184016, -0.012009647748191056, -0.1302630867906223, 0.2952160616698638, 0.056684324856550526, 0.2592580573079653, 0.08775428868326043, 0.0776993732708763, -0.022254493877687676, 0.04148362812358798, 0.04887578181013113, -0.12143664574674533, 0.09333982612703025, 0.1774341176194322, -0.02937924759517475, 0.20178954112966815, -0.46464358020837854, -0.2092105156236042, 0.06604628001691959, 0.17407460964658833, 0.11343973069121753, -0.0796605899699003, -0.2316413299055902, 0.04553799213122899, -0.1098666951558956, -0.19411332362998776, -0.057386171835379335, 0.05007428316469121, 0.028313474722323925, -0.22799427410235673, 0.07198274631317206, 0.10171061614528298, 0.092005691007073, -0.10348618568533548, -0.06538754299385693, -0.061880812146077595, 0.07825743629575127, 0.04844750896440892, 0.07016444379669123, 0.20585429286730922, -0.16879590403327102, -0.11656193589190329, 0.3750289726789718, -0.07298649011883797, -0.15675506492944682, 0.1581307335309391, -0.2193368572309085, -0.06838347967054079, 0.16036829713908002, 0.17896004123833237, 0.13138739435427535, -0.13221463334460662, 0.055502426358651165, -0.030444723229459302, 0.12005698346481548, 0.08690844675687355, 0.08356314782221896, 0.31266963511236073, 0.14269756634562006, 0.06737214298442182, 0.18995182221529888, -0.17333739099879272, -0.051791358324809106, -0.27100610777765044, -0.19959254547454944, -0.1952483403225114, 0.09484797838239337, -0.05655569792152236, -0.1461161635926096, 0.3876225979683378, 0.1644087456185994, 0.20146586033002306, -0.05715765837601965, 0.31517386222331545, 0.0722986536744916, 0.08311683880751879, 0.10537767163331173, 0.2696966091757567, 0.15628672642889982, 0.16752141425166073, -0.2787333827293441, -0.05206263410367482, 0.01228686968436626] |
1,802.09303 | A Decomposition Algorithm for the Sparse Generalized Eigenvalue Problem | The sparse generalized eigenvalue problem arises in a number of standard and
modern statistical learning models, including sparse principal component
analysis, sparse Fisher discriminant analysis, and sparse canonical correlation
analysis. However, this problem is difficult to solve since it is NP-hard. In
this paper, we consider a new decomposition method to tackle this problem.
Specifically, we use random or/and swapping strategies to find a working set
and perform global combinatorial search over the small subset of variables. We
consider a bisection search method and a coordinate descent method for solving
the quadratic fractional programming subproblem. In addition, we provide some
theoretical analysis for the proposed method. Our experiments have shown that
the proposed method significantly and consistently outperforms existing
solutions in term of accuracy.
| cs.NA | the sparse generalized eigenvalue problem arises in a number of standard and modern statistical learning models including sparse principal component analysis sparse fisher discriminant analysis and sparse canonical correlation analysis however this problem is difficult to solve since it is nphard in this paper we consider a new decomposition method to tackle this problem specifically we use random orand swapping strategies to find a working set and perform global combinatorial search over the small subset of variables we consider a bisection search method and a coordinate descent method for solving the quadratic fractional programming subproblem in addition we provide some theoretical analysis for the proposed method our experiments have shown that the proposed method significantly and consistently outperforms existing solutions in term of accuracy | [['the', 'sparse', 'generalized', 'eigenvalue', 'problem', 'arises', 'in', 'a', 'number', 'of', 'standard', 'and', 'modern', 'statistical', 'learning', 'models', 'including', 'sparse', 'principal', 'component', 'analysis', 'sparse', 'fisher', 'discriminant', 'analysis', 'and', 'sparse', 'canonical', 'correlation', 'analysis', 'however', 'this', 'problem', 'is', 'difficult', 'to', 'solve', 'since', 'it', 'is', 'nphard', 'in', 'this', 'paper', 'we', 'consider', 'a', 'new', 'decomposition', 'method', 'to', 'tackle', 'this', 'problem', 'specifically', 'we', 'use', 'random', 'orand', 'swapping', 'strategies', 'to', 'find', 'a', 'working', 'set', 'and', 'perform', 'global', 'combinatorial', 'search', 'over', 'the', 'small', 'subset', 'of', 'variables', 'we', 'consider', 'a', 'bisection', 'search', 'method', 'and', 'a', 'coordinate', 'descent', 'method', 'for', 'solving', 'the', 'quadratic', 'fractional', 'programming', 'subproblem', 'in', 'addition', 'we', 'provide', 'some', 'theoretical', 'analysis', 'for', 'the', 'proposed', 'method', 'our', 'experiments', 'have', 'shown', 'that', 'the', 'proposed', 'method', 'significantly', 'and', 'consistently', 'outperforms', 'existing', 'solutions', 'in', 'term', 'of', 'accuracy']] | [-0.075345838103526, -0.06224725646485064, -0.10091071409143267, 0.0790982763686653, -0.11855283058098247, -0.16765211393020205, 0.05006307567518595, 0.3668827977756249, -0.33527196272306387, -0.3074449423790699, 0.1348155193488985, -0.24997830618315586, -0.235337526244562, 0.1796244337906941, -0.0708485551839394, 0.1000982346989575, 0.12488410610239953, 0.018830424473450083, -0.09026709981838893, -0.2633936798337081, 0.2773729502523859, 0.01734140555415633, 0.2878588986838417, 0.00019574004240454206, 0.1229041238912032, 0.034130585792985176, -0.08398020453657204, 0.06436435308217281, -0.06960436379220834, 0.15459347449171718, 0.3007972614581553, 0.20094108531221508, 0.34044032326839385, -0.374373355760209, -0.20718777183097817, 0.17917364385474713, 0.156425658930769, 0.1155651236523784, -0.045886791378800425, -0.22295797820533475, 0.10260630344055244, -0.15587055574982397, -0.06362898937321358, -0.15442623473075312, -0.04230404506069458, -0.03638066494585796, -0.3289947332964549, 0.0855569530770393, 0.05521404147721994, 0.023826771990335997, -0.04827799082211699, -0.1652071459233881, 0.11455649728961889, 0.03071938409665299, 0.05234670768151127, 0.023107025830540806, 0.06783906122549407, -0.09317815314880723, -0.13949715480398042, 0.3763875785103488, -0.04698749639153961, -0.25953476896205346, 0.15345737609952206, -0.029567990286816514, -0.2196922927734352, 0.09525451957879047, 0.2440372893338903, 0.1942715750924582, -0.1383897740123493, 0.10122314312696201, -0.10138074566625178, 0.158547819584548, 0.025448065406958303, -0.03415598712801453, 0.11990392252787828, 0.20370614210203772, 0.12776078333544935, 0.15355735351406638, -0.09757640756030131, -0.11264378276293076, -0.2275366079092266, -0.10483288089744747, -0.1979917720516002, -0.03335603806584503, -0.12234618117403326, -0.16707131303466607, 0.4100891909911297, 0.2054675142806504, 0.15602604638139206, 0.10575244461694139, 0.3324734674195849, 0.11802996992851296, 0.03877639747083923, 0.11355092812276955, 0.18876469729870987, 0.12563002642033802, 0.09539125975683302, -0.23653956306272098, 0.029068712982529353, 0.11481671950652174] |
1,802.09304 | Marked Self-Exciting Point Process Modelling of Information Diffusion on
Twitter | Information diffusion occurs on microblogging platforms like Twitter as
retweet cascades. When a tweet is posted, it may be retweeted and henceforth
further retweeted, and the retweeting process continues iteratively and
indefinitely. A natural measure of the popularity of a tweet is the number of
retweets it generates. Accurate predictions of tweet popularity can assist
Twitter to rank contents more effectively and facilitate the assessment of
potential for marketing and campaigning strategies. In this paper, we propose a
model called the Marked Self-Exciting Process with Time-Dependent Excitation
Function, or MaSEPTiDE for short, to model the retweeting dynamics and to
predict the tweet popularity. Our model does not require expensive feature
engineering but is capable of leveraging the observed dynamics to accurately
predict the future evolution of retweet cascades. We apply our proposed
methodology on a large amount of Twitter data and report substantial
improvement in prediction performance over existing approaches in the
literature.
| stat.AP | information diffusion occurs on microblogging platforms like twitter as retweet cascades when a tweet is posted it may be retweeted and henceforth further retweeted and the retweeting process continues iteratively and indefinitely a natural measure of the popularity of a tweet is the number of retweets it generates accurate predictions of tweet popularity can assist twitter to rank contents more effectively and facilitate the assessment of potential for marketing and campaigning strategies in this paper we propose a model called the marked selfexciting process with timedependent excitation function or maseptide for short to model the retweeting dynamics and to predict the tweet popularity our model does not require expensive feature engineering but is capable of leveraging the observed dynamics to accurately predict the future evolution of retweet cascades we apply our proposed methodology on a large amount of twitter data and report substantial improvement in prediction performance over existing approaches in the literature | [['information', 'diffusion', 'occurs', 'on', 'microblogging', 'platforms', 'like', 'twitter', 'as', 'retweet', 'cascades', 'when', 'a', 'tweet', 'is', 'posted', 'it', 'may', 'be', 'retweeted', 'and', 'henceforth', 'further', 'retweeted', 'and', 'the', 'retweeting', 'process', 'continues', 'iteratively', 'and', 'indefinitely', 'a', 'natural', 'measure', 'of', 'the', 'popularity', 'of', 'a', 'tweet', 'is', 'the', 'number', 'of', 'retweets', 'it', 'generates', 'accurate', 'predictions', 'of', 'tweet', 'popularity', 'can', 'assist', 'twitter', 'to', 'rank', 'contents', 'more', 'effectively', 'and', 'facilitate', 'the', 'assessment', 'of', 'potential', 'for', 'marketing', 'and', 'campaigning', 'strategies', 'in', 'this', 'paper', 'we', 'propose', 'a', 'model', 'called', 'the', 'marked', 'selfexciting', 'process', 'with', 'timedependent', 'excitation', 'function', 'or', 'maseptide', 'for', 'short', 'to', 'model', 'the', 'retweeting', 'dynamics', 'and', 'to', 'predict', 'the', 'tweet', 'popularity', 'our', 'model', 'does', 'not', 'require', 'expensive', 'feature', 'engineering', 'but', 'is', 'capable', 'of', 'leveraging', 'the', 'observed', 'dynamics', 'to', 'accurately', 'predict', 'the', 'future', 'evolution', 'of', 'retweet', 'cascades', 'we', 'apply', 'our', 'proposed', 'methodology', 'on', 'a', 'large', 'amount', 'of', 'twitter', 'data', 'and', 'report', 'substantial', 'improvement', 'in', 'prediction', 'performance', 'over', 'existing', 'approaches', 'in', 'the', 'literature']] | [-0.05834046797597119, 0.05032654994590159, -0.08173747067983066, 0.13052469814946513, -0.15284175155868165, -0.13689674657316095, 0.09782173636593047, 0.42181030673121933, -0.258337023508686, -0.33764832000566747, 0.07829542713328633, -0.3608039918318881, -0.1996298509107682, 0.17236708496746264, -0.07031166157532043, 0.01896682326485844, 0.08641668054118973, 0.1033584187971428, 0.02637841966076705, -0.31698439936276135, 0.2786974662510482, 0.09785172491530447, 0.3578599646601728, 0.09363837140508142, 0.07861198488727066, 0.0170887290503168, -0.09966840572336591, -0.02120263403967807, -0.09988897557865896, 0.1295206134121767, 0.29985479765424605, 0.21527144395574732, 0.3516004104167223, -0.409049506890465, -0.2562326952006276, 0.09656135183391407, 0.1665354032731174, 0.1245086544321997, -0.027254320620302582, -0.31634902149610417, 0.0625589549802642, -0.2326765070626463, -0.044707338377759843, -0.10705395123774283, 0.044302759772491346, 0.02880578498527604, -0.2617514486835142, 0.07136329416320414, 0.031786129690437134, 0.04615065974135896, 0.0029599895826418346, -0.05201494912647544, -0.017565201297034753, 0.17833234862317973, 0.10203681212404167, 0.00012726693239528686, 0.1826557805424703, -0.16073485633425758, -0.1369245748348093, 0.3972900393418968, -0.08680247136324301, -0.16080563573938744, 0.1763723588205482, -0.06482421141730524, -0.13128791572480145, 0.10820300185954884, 0.27435226419229847, 0.0985694436287878, -0.14171611732011738, -0.0592813944948782, -0.0352485258818457, 0.20370765374115618, 0.013153087353873017, -0.022080761243782228, 0.19741766542153383, 0.24452239743550308, 0.032335680140500984, 0.0815963640335739, -0.07184237176491144, -0.07999735167456827, -0.18560684717100995, -0.12716738012759857, -0.17234748505717634, 0.04735529953684722, -0.08484139850014272, -0.14815039280802011, 0.4261287426159374, 0.2289936419455396, 0.18289530904975868, 0.07286275109570277, 0.27840597353152635, 0.022544314191021073, 0.07336433974820752, 0.09193264431393657, 0.12636422258066504, -0.026843482286877635, 0.20101851376468977, -0.14093146164821901, 0.1757997568056453, 0.0058442093431949615] |
1,802.09305 | Dimensional crossover of heat conduction in amorphous Polyimide
nanofibers | The mechanism of thermal conductivity in amorphous polymers, especially
polymer fibers, is unclear in comparison with that in inorganic materials.
Here, we report the observation of across over of heat conduction behavior from
three dimensions (3D) to quasi-one dimension (1D) in Polyimide(PI) nanofibers
at a given temperature. A theoretical model based on the random walk theory has
been proposed to quantitatively describe the interplay between the inter-chain
hopping and the intra-chain hopping in nanofibers. This model explains well the
diameter dependence of thermal conductivity and also speculates the upper limit
of thermal conductivity of amorphous polymers in the quasi-1D limit.
| physics.app-ph cond-mat.mes-hall | the mechanism of thermal conductivity in amorphous polymers especially polymer fibers is unclear in comparison with that in inorganic materials here we report the observation of across over of heat conduction behavior from three dimensions 3d to quasione dimension 1d in polyimidepi nanofibers at a given temperature a theoretical model based on the random walk theory has been proposed to quantitatively describe the interplay between the interchain hopping and the intrachain hopping in nanofibers this model explains well the diameter dependence of thermal conductivity and also speculates the upper limit of thermal conductivity of amorphous polymers in the quasi1d limit | [['the', 'mechanism', 'of', 'thermal', 'conductivity', 'in', 'amorphous', 'polymers', 'especially', 'polymer', 'fibers', 'is', 'unclear', 'in', 'comparison', 'with', 'that', 'in', 'inorganic', 'materials', 'here', 'we', 'report', 'the', 'observation', 'of', 'across', 'over', 'of', 'heat', 'conduction', 'behavior', 'from', 'three', 'dimensions', '3d', 'to', 'quasione', 'dimension', '1d', 'in', 'polyimidepi', 'nanofibers', 'at', 'a', 'given', 'temperature', 'a', 'theoretical', 'model', 'based', 'on', 'the', 'random', 'walk', 'theory', 'has', 'been', 'proposed', 'to', 'quantitatively', 'describe', 'the', 'interplay', 'between', 'the', 'interchain', 'hopping', 'and', 'the', 'intrachain', 'hopping', 'in', 'nanofibers', 'this', 'model', 'explains', 'well', 'the', 'diameter', 'dependence', 'of', 'thermal', 'conductivity', 'and', 'also', 'speculates', 'the', 'upper', 'limit', 'of', 'thermal', 'conductivity', 'of', 'amorphous', 'polymers', 'in', 'the', 'quasi1d', 'limit']] | [-0.10765975763588542, 0.20223006737804172, -0.05006804808767305, -0.05065915479578755, 0.00414570546803074, -0.1516052076329637, 0.06070702704436362, 0.4320725854015862, -0.26857242371999857, -0.22931048972767334, 0.022818013816375774, -0.3196398982533602, -0.16988426141177465, 0.1724704800954446, 0.012706757292640631, 0.029530856988834914, -0.020920676677817045, -0.05288147246182868, -0.023489186472043094, -0.20452213200336003, 0.2123585739161236, 0.048873627370204585, 0.32975818036650917, 0.156458964058659, 0.044612203630609346, 0.005499662613293928, 0.07197755678189975, 0.04578623923501282, -0.2018231211548096, 0.09065245997837999, 0.22550091175644688, -0.15115353180627067, 0.14977567095422384, -0.45941874021758333, -0.28295636464926327, 0.04566579437203178, 0.14007147527629077, 0.12143712911303296, 0.01094246118898607, -0.1930603560794032, 0.006162265636675963, -0.1405768070718029, -0.1051640125824817, -0.0555951617648731, 0.05147324613944599, 0.012297003786314768, -0.21021528446087331, 0.13287887328587744, 0.06156665707980706, 0.09140028855075467, -0.10240300114953307, -0.12196767175889979, -0.04538051687319754, 0.06689991909573137, 0.060304903458201824, -0.049606180086619024, 0.18411312598001325, -0.14625763496844982, -0.1119268603265436, 0.37775136862006603, -0.08970660025799515, -0.1300243233528101, 0.2179127500011501, -0.17760528892165783, -0.09057115287416512, 0.17786342566926974, 0.133869885250625, 0.0696853365128239, -0.18220336072034005, 0.09818482512697539, -0.038634241991347136, 0.15999374904839153, 0.023949311531120628, 0.06938121373285398, 0.23487268680367956, 0.2965880372947214, -0.02607610277511706, 0.2123991275921163, -0.11459558224070328, -0.09102833774317094, -0.19445756087173718, -0.18440096851995666, -0.2655067967434386, 0.0960427142134068, -0.14718275616913234, -0.22526174013484082, 0.3916016037227831, 0.20120357753088078, 0.20007095218758392, 0.0364024019820705, 0.23577254758489252, 0.03467855689990701, 0.034085436138521996, 0.03465490759529098, 0.2536304694779142, 0.20805578589477022, 0.14858529262239997, -0.2726004000757868, 0.07223955606759498, 0.05853399767886114] |
1,802.09306 | Detailed chemical compositions of the wide binary HD 80606/80607:
revised stellar properties and constraints on planet formation | Differences in the elemental abundances of planet hosting stars in binary
systems can give important clues and constraints about planet formation and
evolution. In this study we performed a high-precision, differential elemental
abundance analysis of a wide binary system, HD 80606/80607, based on
high-resolution, high signal-to-noise ratio Keck/HIRES spectra. HD 80606 is
known to host a four Jupiter mass giant planet while no planet has yet been
detected around HD 80607. We determined stellar parameters as well as
abundances for 23 elements for these two stars with extremely high precision.
Our main results are: (i) we confirmed that the two components share very
similar chemical compositions, but HD 80606 is marginally more metal-rich than
HD 80607 with an average difference of +0.013 $\pm$ 0.002 dex ($\sigma$ = 0.009
dex) and (ii) there is no obvious trend between abundance differences and
condensation temperature. Assuming this binary formed from material with the
same chemical composition, it is difficult to understand how giant planet
formation could produce the present-day photospheric abundances of the elements
we measure. We can not exclude the possibility that HD 80606 might have
accreted about 2.5 to 5 $M_{\rm Earth}$ material onto its surface, possibly
from a planet destabilised by the known highly-eccentric giant.
| astro-ph.SR astro-ph.EP | differences in the elemental abundances of planet hosting stars in binary systems can give important clues and constraints about planet formation and evolution in this study we performed a highprecision differential elemental abundance analysis of a wide binary system hd 8060680607 based on highresolution high signaltonoise ratio keckhires spectra hd 80606 is known to host a four jupiter mass giant planet while no planet has yet been detected around hd 80607 we determined stellar parameters as well as abundances for 23 elements for these two stars with extremely high precision our main results are i we confirmed that the two components share very similar chemical compositions but hd 80606 is marginally more metalrich than hd 80607 with an average difference of 0013 pm 0002 dex sigma 0009 dex and ii there is no obvious trend between abundance differences and condensation temperature assuming this binary formed from material with the same chemical composition it is difficult to understand how giant planet formation could produce the presentday photospheric abundances of the elements we measure we can not exclude the possibility that hd 80606 might have accreted about 25 to 5 m_rm earth material onto its surface possibly from a planet destabilised by the known highlyeccentric giant | [['differences', 'in', 'the', 'elemental', 'abundances', 'of', 'planet', 'hosting', 'stars', 'in', 'binary', 'systems', 'can', 'give', 'important', 'clues', 'and', 'constraints', 'about', 'planet', 'formation', 'and', 'evolution', 'in', 'this', 'study', 'we', 'performed', 'a', 'highprecision', 'differential', 'elemental', 'abundance', 'analysis', 'of', 'a', 'wide', 'binary', 'system', 'hd', '8060680607', 'based', 'on', 'highresolution', 'high', 'signaltonoise', 'ratio', 'keckhires', 'spectra', 'hd', '80606', 'is', 'known', 'to', 'host', 'a', 'four', 'jupiter', 'mass', 'giant', 'planet', 'while', 'no', 'planet', 'has', 'yet', 'been', 'detected', 'around', 'hd', 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1,802.09307 | Digital Scientific Notations as a Human-Computer Interface in
Computer-Aided Research | Most of today's scientific research relies on computers and software not only
for administrational tasks, but also for processing scientific information.
Examples of such computer-aided research are the analysis of experimental data
or the simulation of phenomena based on theoretical models. With the rapid
increase of computational power, scientific software has integrated more and
more complex scientific knowledge in a black-box fashion. As a consequence, its
users do not know, and don't even have a chance of finding out, which models or
assumptions their computations are based on. The black-box nature of scientific
software has thereby become a major cause of mistakes. The present work starts
with an analysis of this situation from the point of view of human-computer
interaction in scientific research. It identifies the key role of digital
scientific notations at the human-computer interface, and describes a
proof-of-concept implementation of such a digital scientific notation for
scientific models formulated as mathematical equations.
| cs.HC cs.CY | most of todays scientific research relies on computers and software not only for administrational tasks but also for processing scientific information examples of such computeraided research are the analysis of experimental data or the simulation of phenomena based on theoretical models with the rapid increase of computational power scientific software has integrated more and more complex scientific knowledge in a blackbox fashion as a consequence its users do not know and dont even have a chance of finding out which models or assumptions their computations are based on the blackbox nature of scientific software has thereby become a major cause of mistakes the present work starts with an analysis of this situation from the point of view of humancomputer interaction in scientific research it identifies the key role of digital scientific notations at the humancomputer interface and describes a proofofconcept implementation of such a digital scientific notation for scientific models formulated as mathematical equations | [['most', 'of', 'todays', 'scientific', 'research', 'relies', 'on', 'computers', 'and', 'software', 'not', 'only', 'for', 'administrational', 'tasks', 'but', 'also', 'for', 'processing', 'scientific', 'information', 'examples', 'of', 'such', 'computeraided', 'research', 'are', 'the', 'analysis', 'of', 'experimental', 'data', 'or', 'the', 'simulation', 'of', 'phenomena', 'based', 'on', 'theoretical', 'models', 'with', 'the', 'rapid', 'increase', 'of', 'computational', 'power', 'scientific', 'software', 'has', 'integrated', 'more', 'and', 'more', 'complex', 'scientific', 'knowledge', 'in', 'a', 'blackbox', 'fashion', 'as', 'a', 'consequence', 'its', 'users', 'do', 'not', 'know', 'and', 'dont', 'even', 'have', 'a', 'chance', 'of', 'finding', 'out', 'which', 'models', 'or', 'assumptions', 'their', 'computations', 'are', 'based', 'on', 'the', 'blackbox', 'nature', 'of', 'scientific', 'software', 'has', 'thereby', 'become', 'a', 'major', 'cause', 'of', 'mistakes', 'the', 'present', 'work', 'starts', 'with', 'an', 'analysis', 'of', 'this', 'situation', 'from', 'the', 'point', 'of', 'view', 'of', 'humancomputer', 'interaction', 'in', 'scientific', 'research', 'it', 'identifies', 'the', 'key', 'role', 'of', 'digital', 'scientific', 'notations', 'at', 'the', 'humancomputer', 'interface', 'and', 'describes', 'a', 'proofofconcept', 'implementation', 'of', 'such', 'a', 'digital', 'scientific', 'notation', 'for', 'scientific', 'models', 'formulated', 'as', 'mathematical', 'equations']] | [-0.08594813757253433, 0.0018916331039280539, -0.07810023933758631, 0.023269653167374723, -0.13935659337618383, -0.13808973512484454, 0.02585479856797439, 0.3590836244653545, -0.22091852933901904, -0.3846635146833518, 0.11152692923620587, -0.2804735914858825, -0.19257100052169823, 0.2936648229552506, -0.08365882892965101, 0.05423840149069887, 0.09127780848054909, 0.03349761637475561, -0.03947464636149603, -0.25299312136580354, 0.28331379184736777, 0.079577792557626, 0.29381775078241973, 0.08239371286632091, 0.040055848768413116, -0.005076429420881265, -0.11854807719789154, -0.040475606674851936, -0.07189551295615197, 0.15422313471379526, 0.3655279857489374, 0.24954282011824594, 0.3922661838754768, -0.45488045773669783, -0.20083213532100025, 0.07164815093658475, 0.15153936722264108, 0.10800916126554869, -0.08932554492444635, -0.2722577694658908, 0.0404175695403193, -0.17180968069903602, -0.09604966557688183, -0.09206883583729174, 0.029531613622299013, 0.008881465184922312, -0.19124747904967151, -0.010372246142508755, 0.092062864896957, 0.16185895246727502, 0.020405203361958994, -0.1328271637774176, 0.001722625995456588, 0.17187926732308043, 0.06079140356797961, 0.033018452771239326, 0.15459485103001855, -0.19934488928365504, -0.15009300161177427, 0.4208771426449804, 0.04141985446563161, -0.16961125210779748, 0.22192891838570777, -0.04812762910177554, -0.18275825944090007, 0.06727920970544705, 0.21187932648409913, 0.06055644563600129, -0.15510350493166378, 0.09378896587759597, 0.02047453326434871, 0.19107583002130246, 0.013891739517015106, 0.020727415888698076, 0.25136880318518556, 0.21568657326956395, 0.035546975901192115, 0.06762095161156692, -0.0025958704664767566, -0.11689452873999436, -0.2794851317021728, -0.16942888155299562, -0.1724443831207121, 0.03928529246412735, -0.037188346978213056, -0.21414000648104287, 0.38176171824311705, 0.19591887757863874, 0.09691909189013387, 0.01847280551043333, 0.3499444905802413, 0.03226570938896461, 0.09144246757328754, 0.06045039608660671, 0.1996972476759183, 0.03699329010290063, 0.2037859799133407, -0.09715710867202408, 0.12841259035756628, -0.029077562266120724] |
1,802.09308 | Max-Mahalanobis Linear Discriminant Analysis Networks | A deep neural network (DNN) consists of a nonlinear transformation from an
input to a feature representation, followed by a common softmax linear
classifier. Though many efforts have been devoted to designing a proper
architecture for nonlinear transformation, little investigation has been done
on the classifier part. In this paper, we show that a properly designed
classifier can improve robustness to adversarial attacks and lead to better
prediction results. Specifically, we define a Max-Mahalanobis distribution
(MMD) and theoretically show that if the input distributes as a MMD, the linear
discriminant analysis (LDA) classifier will have the best robustness to
adversarial examples. We further propose a novel Max-Mahalanobis linear
discriminant analysis (MM-LDA) network, which explicitly maps a complicated
data distribution in the input space to a MMD in the latent feature space and
then applies LDA to make predictions. Our results demonstrate that the MM-LDA
networks are significantly more robust to adversarial attacks, and have better
performance in class-biased classification.
| cs.LG | a deep neural network dnn consists of a nonlinear transformation from an input to a feature representation followed by a common softmax linear classifier though many efforts have been devoted to designing a proper architecture for nonlinear transformation little investigation has been done on the classifier part in this paper we show that a properly designed classifier can improve robustness to adversarial attacks and lead to better prediction results specifically we define a maxmahalanobis distribution mmd and theoretically show that if the input distributes as a mmd the linear discriminant analysis lda classifier will have the best robustness to adversarial examples we further propose a novel maxmahalanobis linear discriminant analysis mmlda network which explicitly maps a complicated data distribution in the input space to a mmd in the latent feature space and then applies lda to make predictions our results demonstrate that the mmlda networks are significantly more robust to adversarial attacks and have better performance in classbiased classification | [['a', 'deep', 'neural', 'network', 'dnn', 'consists', 'of', 'a', 'nonlinear', 'transformation', 'from', 'an', 'input', 'to', 'a', 'feature', 'representation', 'followed', 'by', 'a', 'common', 'softmax', 'linear', 'classifier', 'though', 'many', 'efforts', 'have', 'been', 'devoted', 'to', 'designing', 'a', 'proper', 'architecture', 'for', 'nonlinear', 'transformation', 'little', 'investigation', 'has', 'been', 'done', 'on', 'the', 'classifier', 'part', 'in', 'this', 'paper', 'we', 'show', 'that', 'a', 'properly', 'designed', 'classifier', 'can', 'improve', 'robustness', 'to', 'adversarial', 'attacks', 'and', 'lead', 'to', 'better', 'prediction', 'results', 'specifically', 'we', 'define', 'a', 'maxmahalanobis', 'distribution', 'mmd', 'and', 'theoretically', 'show', 'that', 'if', 'the', 'input', 'distributes', 'as', 'a', 'mmd', 'the', 'linear', 'discriminant', 'analysis', 'lda', 'classifier', 'will', 'have', 'the', 'best', 'robustness', 'to', 'adversarial', 'examples', 'we', 'further', 'propose', 'a', 'novel', 'maxmahalanobis', 'linear', 'discriminant', 'analysis', 'mmlda', 'network', 'which', 'explicitly', 'maps', 'a', 'complicated', 'data', 'distribution', 'in', 'the', 'input', 'space', 'to', 'a', 'mmd', 'in', 'the', 'latent', 'feature', 'space', 'and', 'then', 'applies', 'lda', 'to', 'make', 'predictions', 'our', 'results', 'demonstrate', 'that', 'the', 'mmlda', 'networks', 'are', 'significantly', 'more', 'robust', 'to', 'adversarial', 'attacks', 'and', 'have', 'better', 'performance', 'in', 'classbiased', 'classification']] | [-0.029938817519374047, -0.0379501311644245, -0.13289042118507402, 0.10453716237869042, -0.12356866028933942, -0.1867270009719174, 0.05132038245815179, 0.45023574403716954, -0.2816670336337252, -0.27160225175442054, 0.049182664736041, -0.27253156356126457, -0.25614881651875165, 0.1681585243563682, -0.1325024623218198, 0.14055036399936813, 0.10660265181697422, 0.0513102128608878, -0.07811772321538346, -0.31512577763256655, 0.33177491856509117, 0.08463103096616945, 0.35506022552500005, -0.030876192738991472, 0.10003498737933114, -0.040361574960588294, -0.01103418930615117, 0.0189221887558233, -0.04774034398757398, 0.15159981333054964, 0.32278412992932964, 0.17313381150673302, 0.37534885909166427, -0.39559129240934726, -0.2780580466806695, 0.12789826083613873, 0.11775810908006093, 0.13316684678218074, -0.021898919057011055, -0.31276593303199035, 0.1123455808098827, -0.17021008026967574, -0.0071282055827655965, -0.200891599500576, -0.028857758093335024, -0.0206848984333239, -0.31583518549412876, -0.010490347023355221, 0.13320366512415568, 0.03071177800718163, -0.041478197178773143, -0.10686252486299384, -0.002688680814772651, 0.09642671134214026, 0.02010134356429002, 0.08441306568240722, 0.08793489571189048, -0.1336614456097293, -0.12382602655629676, 0.32833927937529306, -0.09326491447909457, -0.24573733914468146, 0.160234968516637, -0.015246314566594536, -0.16219410232068704, 0.09381819824240618, 0.2914214969564278, 0.07523504450203633, -0.1602329358204522, 0.0037528874425144937, -0.05140377396669287, 0.20164422129051057, 0.007383244084920008, -0.02294865594693012, 0.14629934650358997, 0.25713763954480745, 0.058907250104193856, 0.18646533503015708, -0.12925755920934842, -0.04015124061253744, -0.22088108468776593, -0.0990584156613543, -0.1943792722568932, -0.005000970482088432, -0.08466555905043051, -0.14194276565897532, 0.4350199903446165, 0.20175195817666297, 0.26030796258891753, 0.10925611739225274, 0.3363728307644147, 0.05414960679731199, 0.11615389947138437, 0.10948544974717034, 0.23193133728844778, 0.0787067836794591, 0.0554061492016031, -0.1478502457615974, 0.10068627481814474, 0.03526816564587901] |
1,802.09309 | The density of ramified primes | Let $F$ be a number field, $\mathcal{O}$ be a domain with fraction field
$\mathcal{K}$ of characteristic zero and $\rho: \mathrm{Gal}(\overline F/F) \to
\mathrm{GL}_n(\mathcal{O})$ be a representation such that
$\rho\otimes\overline{\mathcal{K}}$ is semisimple. If $\mathcal{O}$ admits a
finite monomorphism from a power series ring with coefficients in a $p$-adic
integer ring (resp. $\mathcal{O}$ is an affinoid algebra over a $p$-adic number
field) and $\rho$ is continuous with respect to the maximal ideal adic topology
(resp. the Banach algebra topology), then we prove that the set of ramified
primes of $\rho$ is of density zero. If $\mathcal{O}$ is a complete local
Noetherian ring over $\mathbb{Z}_p$ with finite residue field of characteristic
$p$, $\rho$ is continuous with respect to the maximal ideal adic topology and
the kernels of pure specializations of $\rho$ form a Zariski-dense subset of
$\mathrm{Spec} \mathcal{O}$, then we show that the set of ramified primes of
$\rho$ is of density zero. These results are analogues, in the context of big
Galois representations, of a result of Khare and Rajan, and are proved relying
on their result.
| math.NT | let f be a number field mathcalo be a domain with fraction field mathcalk of characteristic zero and rho mathrmgaloverline ff to mathrmgl_nmathcalo be a representation such that rhootimesoverlinemathcalk is semisimple if mathcalo admits a finite monomorphism from a power series ring with coefficients in a padic integer ring resp mathcalo is an affinoid algebra over a padic number field and rho is continuous with respect to the maximal ideal adic topology resp the banach algebra topology then we prove that the set of ramified primes of rho is of density zero if mathcalo is a complete local noetherian ring over mathbbz_p with finite residue field of characteristic p rho is continuous with respect to the maximal ideal adic topology and the kernels of pure specializations of rho form a zariskidense subset of mathrmspec mathcalo then we show that the set of ramified primes of rho is of density zero these results are analogues in the context of big galois representations of a result of khare and rajan and are proved relying on their result | [['let', 'f', 'be', 'a', 'number', 'field', 'mathcalo', 'be', 'a', 'domain', 'with', 'fraction', 'field', 'mathcalk', 'of', 'characteristic', 'zero', 'and', 'rho', 'mathrmgaloverline', 'ff', 'to', 'mathrmgl_nmathcalo', 'be', 'a', 'representation', 'such', 'that', 'rhootimesoverlinemathcalk', 'is', 'semisimple', 'if', 'mathcalo', 'admits', 'a', 'finite', 'monomorphism', 'from', 'a', 'power', 'series', 'ring', 'with', 'coefficients', 'in', 'a', 'padic', 'integer', 'ring', 'resp', 'mathcalo', 'is', 'an', 'affinoid', 'algebra', 'over', 'a', 'padic', 'number', 'field', 'and', 'rho', 'is', 'continuous', 'with', 'respect', 'to', 'the', 'maximal', 'ideal', 'adic', 'topology', 'resp', 'the', 'banach', 'algebra', 'topology', 'then', 'we', 'prove', 'that', 'the', 'set', 'of', 'ramified', 'primes', 'of', 'rho', 'is', 'of', 'density', 'zero', 'if', 'mathcalo', 'is', 'a', 'complete', 'local', 'noetherian', 'ring', 'over', 'mathbbz_p', 'with', 'finite', 'residue', 'field', 'of', 'characteristic', 'p', 'rho', 'is', 'continuous', 'with', 'respect', 'to', 'the', 'maximal', 'ideal', 'adic', 'topology', 'and', 'the', 'kernels', 'of', 'pure', 'specializations', 'of', 'rho', 'form', 'a', 'zariskidense', 'subset', 'of', 'mathrmspec', 'mathcalo', 'then', 'we', 'show', 'that', 'the', 'set', 'of', 'ramified', 'primes', 'of', 'rho', 'is', 'of', 'density', 'zero', 'these', 'results', 'are', 'analogues', 'in', 'the', 'context', 'of', 'big', 'galois', 'representations', 'of', 'a', 'result', 'of', 'khare', 'and', 'rajan', 'and', 'are', 'proved', 'relying', 'on', 'their', 'result']] | [-0.23578492125073675, 0.10098641482122966, -0.15748483350640433, -0.010524813689404527, -0.09436050991425453, -0.13771307172329095, -0.0315284037510353, 0.3123962303214421, -0.3773505158743934, -0.15470779092371398, 0.06041896599614078, -0.2463556058015782, -0.07062826826334043, 0.19340843666409482, -0.1057378108494759, -0.035235884124305464, 0.0037756410408549745, 0.1937036469492609, -0.06855888324089865, -0.3041146946371118, 0.3817361942411675, -0.07738229463339885, 0.17607260317773143, 0.02099603862431697, 0.0903289290575709, 0.007102825205148645, 0.02691207162368332, 0.025087521910785855, -0.13332722831790494, 0.08219102279396157, 0.3343344341339059, 0.07147406655056887, 0.26455437728860604, -0.3618871309186165, -0.10058661937751306, 0.2623402042357477, 0.11999665509177253, -0.04986290754265868, 0.011318211496210082, -0.2594453516601978, 0.2188615799461615, -0.19674065617058492, -0.15051346464416368, -0.07698164857127246, 0.1237841048547083, 0.04248573296968192, -0.33852273915932013, 0.00775020576022953, 0.08364233559783484, 0.17060088974052254, -0.07978433101018083, -0.1184175937743373, -0.043826448460610186, 0.006886996059662345, -0.034959832969460786, 0.12051110391671947, 0.11711200489797172, -0.11935608272812184, -0.06694409468431951, 0.3455836991214253, -0.10530248401158979, -0.19959578067844874, 0.13202565864288393, -0.2309047640005202, -0.08510829049910855, 0.153767817922884, 0.056704299674487826, 0.14927631831927107, 0.02438100570048383, 0.2876177476325363, -0.1873757116929924, 0.11101074245148689, 0.06660226315281467, 0.015275678201713142, 0.15315092722612778, 0.06905202864739247, 0.10374133780143073, 0.11781452887898818, 0.006351562137473267, 0.001606204299353106, -0.36726108944377284, -0.1827369289192764, -0.15448865232009418, 0.15306177251363937, -0.10750412978216767, -0.17116535331978533, 0.38318262568330447, 0.051569168590482946, 0.20878485819719184, 0.14618194030565507, 0.20504129667244206, 0.10616452040805514, 0.04689611628990771, 0.08742075100153512, 0.008232652427725537, 0.24659454987809665, -0.07982852313104974, -0.15559209273815844, -0.05671693702400635, 0.1573499535301948] |
1,802.0931 | Three-Dimensional Photoacoustic Tomography using Delay Multiply and Sum
Beamforming Algorithm | Photoacoustic imaging (PAI), is a promising medical imaging technique that
provides the high contrast of the optical imaging and the resolution of
ultrasound (US) imaging. Among all the methods, Three-dimensional (3D) PAI
provides a high resolution and accuracy. One of the most common algorithms for
3D PA image reconstruction is delay-and-sum (DAS). However, the quality of the
reconstructed image obtained from this algorithm is not satisfying, having high
level of sidelobes and a wide mainlobe. In this paper, delay-multiply-and-sum
(DMAS) algorithm is suggested to overcome these limitations in 3D PAI. It is
shown that DMAS algorithm is an appropriate reconstruction technique for 3D PAI
and the reconstructed images using this algorithm are improved in the terms of
the width of mainlobe and sidelobes, compared to DAS. Also, the quantitative
results show that DMAS improves signal-to-noise ratio (SNR) and
full-width-half-maximum (FWHM) for about 25 dB and 0.2 mm, respectively,
compared to DAS.
| eess.SP | photoacoustic imaging pai is a promising medical imaging technique that provides the high contrast of the optical imaging and the resolution of ultrasound us imaging among all the methods threedimensional 3d pai provides a high resolution and accuracy one of the most common algorithms for 3d pa image reconstruction is delayandsum das however the quality of the reconstructed image obtained from this algorithm is not satisfying having high level of sidelobes and a wide mainlobe in this paper delaymultiplyandsum dmas algorithm is suggested to overcome these limitations in 3d pai it is shown that dmas algorithm is an appropriate reconstruction technique for 3d pai and the reconstructed images using this algorithm are improved in the terms of the width of mainlobe and sidelobes compared to das also the quantitative results show that dmas improves signaltonoise ratio snr and fullwidthhalfmaximum fwhm for about 25 db and 02 mm respectively compared to das | [['photoacoustic', 'imaging', 'pai', 'is', 'a', 'promising', 'medical', 'imaging', 'technique', 'that', 'provides', 'the', 'high', 'contrast', 'of', 'the', 'optical', 'imaging', 'and', 'the', 'resolution', 'of', 'ultrasound', 'us', 'imaging', 'among', 'all', 'the', 'methods', 'threedimensional', '3d', 'pai', 'provides', 'a', 'high', 'resolution', 'and', 'accuracy', 'one', 'of', 'the', 'most', 'common', 'algorithms', 'for', '3d', 'pa', 'image', 'reconstruction', 'is', 'delayandsum', 'das', 'however', 'the', 'quality', 'of', 'the', 'reconstructed', 'image', 'obtained', 'from', 'this', 'algorithm', 'is', 'not', 'satisfying', 'having', 'high', 'level', 'of', 'sidelobes', 'and', 'a', 'wide', 'mainlobe', 'in', 'this', 'paper', 'delaymultiplyandsum', 'dmas', 'algorithm', 'is', 'suggested', 'to', 'overcome', 'these', 'limitations', 'in', '3d', 'pai', 'it', 'is', 'shown', 'that', 'dmas', 'algorithm', 'is', 'an', 'appropriate', 'reconstruction', 'technique', 'for', '3d', 'pai', 'and', 'the', 'reconstructed', 'images', 'using', 'this', 'algorithm', 'are', 'improved', 'in', 'the', 'terms', 'of', 'the', 'width', 'of', 'mainlobe', 'and', 'sidelobes', 'compared', 'to', 'das', 'also', 'the', 'quantitative', 'results', 'show', 'that', 'dmas', 'improves', 'signaltonoise', 'ratio', 'snr', 'and', 'fullwidthhalfmaximum', 'fwhm', 'for', 'about', '25', 'db', 'and', '02', 'mm', 'respectively', 'compared', 'to', 'das']] | [-0.032986193630899864, -0.034691062332528014, -0.04615844384033159, 0.03927764566407064, -0.021329666231913087, -0.1432546134390529, -0.012571106664065444, 0.432713049827822, -0.20861300168056288, -0.3574230282980677, 0.09483532486128812, -0.2602538437095304, -0.140795353254217, 0.21941540826771977, -0.1468939266864531, 0.09794830963777267, 0.10827447857633726, -0.03310383799862092, -0.06632045922116284, -0.2164900308191184, 0.20262311468061234, 0.13720878368453276, 0.3582850987252021, 0.053164452527162454, 0.16261048787057597, 0.0076076877210906006, -0.04522065710220856, 0.046538141562251854, -0.08607968358265734, 0.13013244802070573, 0.2653504352914848, 0.19521044609630295, 0.2187387617551629, -0.29983552720471723, -0.20382250940877425, 0.026782777854272268, 0.19750743090222891, 0.08091938217472754, -0.03592420492432272, -0.2677428767652504, 0.17125816758882428, -0.11418374067493128, -0.06783248499553922, -0.03471992516409088, -0.07003183395444533, -0.017583986859158025, -0.3370972253437715, 0.11033314150516776, 0.005590190238239158, 0.07002663254947555, -0.07317581197974697, -0.17844273267770247, 0.044316709365399665, 0.10838915587446055, -0.05878460571009493, 0.1270214888540525, 0.04721882848981891, -0.18871959504696065, -0.0739917719601006, 0.37606648740586857, -0.02357398424010773, -0.18010028160874123, 0.1833769576994098, -0.16358774609321, -0.0659640905021733, 0.2627068010400919, 0.11911332419154462, 0.0920313111250443, -0.12330422680269902, 0.037467683027483004, 0.002972242289796373, 0.20873121377574094, 0.14322857993241672, 0.06464622099112892, 0.08118047967355772, 0.19911613077270668, 0.03889509047449424, 0.11630869025691407, -0.2528677887055061, 0.03701881285670479, -0.14991565982484265, -0.16720575434371632, -0.17878815696099834, -0.010954108389787567, -0.11469641610887904, -0.13240492920023514, 0.36570804942991364, 0.2253400803118056, 0.16638623084410384, 0.04154700405945051, 0.4443857083158777, 0.09969580065249312, 0.07325787995232652, 0.027145962270951233, 0.2525418391127435, 0.13528658571153485, 0.16028076820445575, -0.20537852136794452, -0.013563799597816357, 0.016539549063397756] |
1,802.09311 | The replica symmetric phase of random constraint satisfaction problems | Random constraint satisfaction problems play an important role in computer
science and combinatorics. For example, they provide challenging benchmark
instances for algorithms and they have been harnessed in probabilistic
constructions of combinatorial structures with peculiar features. In an
important contribution [Krzakala et al., PNAS 2007] physicists made several
predictions on the precise location and nature of phase transitions in random
constraint satisfaction problems. Specifically, they predicted that their
satisfiability thresholds are quite generally preceded by several other
thresholds that have a substantial impact both combinatorially and
computationally. These include the condensation phase transition, where
long-range correlations between variables emerge, and the reconstruction
threshold. In this paper we prove these physics predictions for a broad class
of random constraint satisfaction problems. Additionally, we obtain contiguity
results that have implications on Bayesian inference tasks, a subject that has
received a great deal of interest recently (e.g., [Banks et al., COLT 2016]).
| math.CO cs.DM math.PR | random constraint satisfaction problems play an important role in computer science and combinatorics for example they provide challenging benchmark instances for algorithms and they have been harnessed in probabilistic constructions of combinatorial structures with peculiar features in an important contribution krzakala et al pnas 2007 physicists made several predictions on the precise location and nature of phase transitions in random constraint satisfaction problems specifically they predicted that their satisfiability thresholds are quite generally preceded by several other thresholds that have a substantial impact both combinatorially and computationally these include the condensation phase transition where longrange correlations between variables emerge and the reconstruction threshold in this paper we prove these physics predictions for a broad class of random constraint satisfaction problems additionally we obtain contiguity results that have implications on bayesian inference tasks a subject that has received a great deal of interest recently eg banks et al colt 2016 | [['random', 'constraint', 'satisfaction', 'problems', 'play', 'an', 'important', 'role', 'in', 'computer', 'science', 'and', 'combinatorics', 'for', 'example', 'they', 'provide', 'challenging', 'benchmark', 'instances', 'for', 'algorithms', 'and', 'they', 'have', 'been', 'harnessed', 'in', 'probabilistic', 'constructions', 'of', 'combinatorial', 'structures', 'with', 'peculiar', 'features', 'in', 'an', 'important', 'contribution', 'krzakala', 'et', 'al', 'pnas', '2007', 'physicists', 'made', 'several', 'predictions', 'on', 'the', 'precise', 'location', 'and', 'nature', 'of', 'phase', 'transitions', 'in', 'random', 'constraint', 'satisfaction', 'problems', 'specifically', 'they', 'predicted', 'that', 'their', 'satisfiability', 'thresholds', 'are', 'quite', 'generally', 'preceded', 'by', 'several', 'other', 'thresholds', 'that', 'have', 'a', 'substantial', 'impact', 'both', 'combinatorially', 'and', 'computationally', 'these', 'include', 'the', 'condensation', 'phase', 'transition', 'where', 'longrange', 'correlations', 'between', 'variables', 'emerge', 'and', 'the', 'reconstruction', 'threshold', 'in', 'this', 'paper', 'we', 'prove', 'these', 'physics', 'predictions', 'for', 'a', 'broad', 'class', 'of', 'random', 'constraint', 'satisfaction', 'problems', 'additionally', 'we', 'obtain', 'contiguity', 'results', 'that', 'have', 'implications', 'on', 'bayesian', 'inference', 'tasks', 'a', 'subject', 'that', 'has', 'received', 'a', 'great', 'deal', 'of', 'interest', 'recently', 'eg', 'banks', 'et', 'al', 'colt', '2016']] | [-0.07765699101646349, 0.07704702058307758, -0.07827189551110085, 0.10926844737095595, -0.10074494275633221, -0.1613096664940951, 0.06839708744113852, 0.39090690629294256, -0.24548437802321058, -0.4034166999548774, 0.10594285588598991, -0.25567127597962047, -0.2213564212215227, 0.19895489655135062, -0.10444715999429358, 0.09634649797323966, 0.07746156527357638, -0.03181129987894608, -0.04627707205245376, -0.29600333926836714, 0.2525481212284141, 0.06858646645891986, 0.28119016434972316, 0.07402033650553816, 0.03414570663636863, -0.0050648287698101474, -0.028720732917384112, 0.06071754385585953, -0.15768092713766457, 0.08624878680746027, 0.3188076686321511, 0.1647343182180002, 0.31742213458297835, -0.43421609422204477, -0.2408890058583386, 0.1334725278132789, 0.10235870669190787, 0.09884944681356342, -0.10125373495467657, -0.30376467961917986, 0.021527079271540146, -0.1611251866338687, -0.02482001324990552, -0.09816982384283571, 0.08262682963950221, 0.013546259348724513, -0.2671390196696024, 0.053525662677825096, 0.10071231059780057, 0.06066409209368113, 0.008405227325825434, -0.1605482559351113, 0.03969832308021618, 0.11717785336077213, 0.010906767364178827, 0.00035638432799769726, 0.07469674292951822, -0.1664497453997524, -0.19561470129867803, 0.3756830655038357, 0.05934605144289316, -0.15928031010990776, 0.20797022501156734, -0.04641987141784305, -0.2754224747288097, 0.1254124725612518, 0.21869453802765754, 0.09753033031721993, -0.11668155630175399, 0.08083879190845565, -0.0736080000127022, 0.14148849004804587, 0.07937277545339909, 0.0512248130402709, 0.21713659018840667, 0.12650030984186986, 0.021343633174683723, 0.11167285749305902, -0.029422425347065472, -0.14144529891122232, -0.21448174239630066, -0.06780333016474024, -0.1467635534928749, -0.007478707969062118, -0.06239384242078374, -0.159192504530035, 0.3519384829364967, 0.1924278355897373, 0.18913181304256588, 0.04071480882097811, 0.19713345549425623, 0.09913287732879875, -0.007147648023291422, 0.061346366655412786, 0.250922346070812, 0.147236995338056, 0.13224047054567892, -0.12259761080920896, 0.11461621402737829, 0.04463519325054832] |
1,802.09312 | DP-3-coloring of some planar graphs | In this article, we use a unified approach to prove several classes of planar
graphs are DP-$3$-colorable, which extend the corresponding results on
$3$-choosability.
| math.CO | in this article we use a unified approach to prove several classes of planar graphs are dp3colorable which extend the corresponding results on 3choosability | [['in', 'this', 'article', 'we', 'use', 'a', 'unified', 'approach', 'to', 'prove', 'several', 'classes', 'of', 'planar', 'graphs', 'are', 'dp3colorable', 'which', 'extend', 'the', 'corresponding', 'results', 'on', '3choosability']] | [-0.04875107253478332, 0.016421618146440862, -0.07112645341972397, 0.0597591822152026, -0.09166344718753615, -0.0238797064574266, 0.006993990306827155, 0.3980753000148318, -0.23580223237248985, -0.2974661902778528, 0.11101551455001092, -0.24048705415969546, -0.2271466754715551, 0.25161572181704367, -0.129451855128123, 0.022891438100486994, 0.08950022373094478, 0.0397271490232511, -0.09101948061619293, -0.2585638674738055, 0.3709020817821676, -0.10959715785628016, 0.2571765516291965, 0.11416052324189381, 0.06582211004570127, -0.02242720129222355, -0.04240565061230551, 0.08080173230899329, -0.22172152924097396, 0.23205779253674502, 0.2530646017667922, 0.08864556000017645, 0.2425569129938429, -0.4040219539945776, -0.19617215645584193, 0.13170418431135741, 0.09204511418515308, 0.162294378625864, -0.004607224238994108, -0.24284284718504007, 0.12860705953260715, -0.17837585868652572, -0.11519449788399717, -0.080399031158198, -0.05661091030660001, 0.041094434447586536, -0.25886025453325023, -0.017529122065752745, 0.14518739088353785, 0.01747701820832762, -0.024999013064767827, -0.08077531157654118, 0.10619793656620789, 0.10030168487521057, -0.0038707379082387142, -0.013274058890105649, 0.028807522390376438, -0.05457046436442232, -0.20330445895987478, 0.34225189143961127, -0.01844005642289465, -0.22574024291878397, 0.21182645150375637, -0.08572468373247168, -0.2675305448938161, 0.05291397513991052, 0.2402076802047139, 0.22052572574466467, -0.17598600283434446, 0.11136147968301718, -0.1442784628068859, 0.07118020642718131, 0.0915699230549349, 0.007354292129589753, 0.1179527918046171, 0.16267347843809563, 0.09321851016614925, 0.24799559660128911, -0.002145941972478547, -0.08378320284695788, -0.34565205025401985, -0.152709024280987, -0.1420226771045815, 0.012026498432863842, -0.05499032842503353, -0.1608473461290652, 0.468040696260604, 0.22963992421599952, 0.23341881902888417, 0.19697180814215576, 0.23072289082814346, 0.050908614034679806, 0.020221605304289948, 0.09638147208500993, 0.20064557309855113, 0.1457154073498466, 0.06089760348285464, -0.09263298084790056, -0.04775435322980312, 0.11697500575841828] |
1,802.09313 | Model-Based Photoacoustic Image Reconstruction using Compressed Sensing
and Smoothed L0 Norm | Photoacoustic imaging (PAI) is a novel medical imaging modality that uses the
advantages of the spatial resolution of ultrasound imaging and the high
contrast of pure optical imaging. Analytical algorithms are usually employed to
reconstruct the photoacoustic (PA) images as a result of their simple
implementation. However, they provide a low accurate image. Model-based (MB)
algorithms are used to improve the image quality and accuracy while a large
number of transducers and data acquisition are needed. In this paper, we have
combined the theory of compressed sensing (CS) with MB algorithms to reduce the
number of transducer. Smoothed version of L0-norm (SL0) was proposed as the
reconstruction method, and it was compared with simple iterative reconstruction
(IR) and basis pursuit. The results show that S$\ell_0$ provides a higher image
quality in comparison with other methods while a low number of transducers
were. Quantitative comparison demonstrates that, at the same condition, the SL0
leads to a peak-signal-to-noise ratio for about two times of the basis pursuit.
| eess.SP | photoacoustic imaging pai is a novel medical imaging modality that uses the advantages of the spatial resolution of ultrasound imaging and the high contrast of pure optical imaging analytical algorithms are usually employed to reconstruct the photoacoustic pa images as a result of their simple implementation however they provide a low accurate image modelbased mb algorithms are used to improve the image quality and accuracy while a large number of transducers and data acquisition are needed in this paper we have combined the theory of compressed sensing cs with mb algorithms to reduce the number of transducer smoothed version of l0norm sl0 was proposed as the reconstruction method and it was compared with simple iterative reconstruction ir and basis pursuit the results show that sell_0 provides a higher image quality in comparison with other methods while a low number of transducers were quantitative comparison demonstrates that at the same condition the sl0 leads to a peaksignaltonoise ratio for about two times of the basis pursuit | [['photoacoustic', 'imaging', 'pai', 'is', 'a', 'novel', 'medical', 'imaging', 'modality', 'that', 'uses', 'the', 'advantages', 'of', 'the', 'spatial', 'resolution', 'of', 'ultrasound', 'imaging', 'and', 'the', 'high', 'contrast', 'of', 'pure', 'optical', 'imaging', 'analytical', 'algorithms', 'are', 'usually', 'employed', 'to', 'reconstruct', 'the', 'photoacoustic', 'pa', 'images', 'as', 'a', 'result', 'of', 'their', 'simple', 'implementation', 'however', 'they', 'provide', 'a', 'low', 'accurate', 'image', 'modelbased', 'mb', 'algorithms', 'are', 'used', 'to', 'improve', 'the', 'image', 'quality', 'and', 'accuracy', 'while', 'a', 'large', 'number', 'of', 'transducers', 'and', 'data', 'acquisition', 'are', 'needed', 'in', 'this', 'paper', 'we', 'have', 'combined', 'the', 'theory', 'of', 'compressed', 'sensing', 'cs', 'with', 'mb', 'algorithms', 'to', 'reduce', 'the', 'number', 'of', 'transducer', 'smoothed', 'version', 'of', 'l0norm', 'sl0', 'was', 'proposed', 'as', 'the', 'reconstruction', 'method', 'and', 'it', 'was', 'compared', 'with', 'simple', 'iterative', 'reconstruction', 'ir', 'and', 'basis', 'pursuit', 'the', 'results', 'show', 'that', 'sell_0', 'provides', 'a', 'higher', 'image', 'quality', 'in', 'comparison', 'with', 'other', 'methods', 'while', 'a', 'low', 'number', 'of', 'transducers', 'were', 'quantitative', 'comparison', 'demonstrates', 'that', 'at', 'the', 'same', 'condition', 'the', 'sl0', 'leads', 'to', 'a', 'peaksignaltonoise', 'ratio', 'for', 'about', 'two', 'times', 'of', 'the', 'basis', 'pursuit']] | [-0.031827859980871946, 0.0060449595415464985, -0.08876649378060658, 0.028499645198036622, -0.06594069001247833, -0.12633951270964178, -0.010094338385587013, 0.4253257242167687, -0.2376023811812047, -0.33954220978406874, 0.13719347800360993, -0.25519113269316535, -0.13672986160395895, 0.21448523230373678, -0.11620258729018998, 0.11482224426205304, 0.10078505600913337, 0.035958906428543456, -0.08045256742142799, -0.21587872846075476, 0.18621857874038653, 0.08603593184635407, 0.3578324150861945, -0.0015338325628829075, 0.13150763103991134, 0.02064124144480291, -0.04705320433259192, 0.04008001803914539, -0.06483212266632507, 0.1773253509622364, 0.297036465654922, 0.19363731111715002, 0.2755269786689385, -0.4242131820789016, -0.21082543317944083, 0.06533694748266987, 0.14727882347062582, 0.12363551735094316, -0.08674810503654909, -0.23453170371741602, 0.12442370107618911, -0.10869664846771829, -0.04062211268763172, -0.09202422985307328, -0.07027716056384123, 0.021305065421762352, -0.3251629191075974, 0.09764179772421967, 0.010079377061096816, 0.07891547458995951, -0.0682995930007409, -0.13942858390794022, 0.05133763222852949, 0.11220056326526058, -0.010831484180682043, 0.08736212602277037, 0.10545649110387852, -0.171646742317712, -0.11889832118020688, 0.3735209824517369, -0.059794526240538534, -0.1865928742790413, 0.23078783146082993, -0.10238521333738435, -0.09965944898076265, 0.19307979107862794, 0.16601774766019023, 0.12837155627529706, -0.12192003634011532, 0.03265937013273332, -0.027393948139123072, 0.20102890131131904, 0.10441735255384318, 0.06620787345043315, 0.1020033177635746, 0.21091779809524647, 0.06316292526274238, 0.1454177984414855, -0.15422224190097483, 0.02881345671683936, -0.20461236944467556, -0.16162589369914934, -0.1924378326888162, -0.05187565215761069, -0.08670625517742138, -0.14785469277966312, 0.36663622613541963, 0.19427958299780673, 0.18234943234498, 0.06487509816680558, 0.41066760930982305, 0.09353954933737064, 0.08172135154302118, 0.00218818756672213, 0.2253258095744702, 0.14416502155619104, 0.13385963597598985, -0.21271207211141632, 0.03307515215526176, 0.06132263242886061] |
1,802.09314 | Gradient flow of the norm squared of a moment map over Kahler manifolds | Inspired by Wilkin's work [23, 24] on Morse theory for the moduli space of
Higgs bundles, we study the moduli space of gauged holomorphic maps by a heat
flow approach in the spirit of Atiyah and Bott in a series of papers. In this
paper, applying the method of Hong [9], we establish the global existence of
smooth solutions of the gradient ow equations of the vortex functional over a
compact Kahler manifold.
| math.DG | inspired by wilkins work 23 24 on morse theory for the moduli space of higgs bundles we study the moduli space of gauged holomorphic maps by a heat flow approach in the spirit of atiyah and bott in a series of papers in this paper applying the method of hong 9 we establish the global existence of smooth solutions of the gradient ow equations of the vortex functional over a compact kahler manifold | [['inspired', 'by', 'wilkins', 'work', '23', '24', 'on', 'morse', 'theory', 'for', 'the', 'moduli', 'space', 'of', 'higgs', 'bundles', 'we', 'study', 'the', 'moduli', 'space', 'of', 'gauged', 'holomorphic', 'maps', 'by', 'a', 'heat', 'flow', 'approach', 'in', 'the', 'spirit', 'of', 'atiyah', 'and', 'bott', 'in', 'a', 'series', 'of', 'papers', 'in', 'this', 'paper', 'applying', 'the', 'method', 'of', 'hong', '9', 'we', 'establish', 'the', 'global', 'existence', 'of', 'smooth', 'solutions', 'of', 'the', 'gradient', 'ow', 'equations', 'of', 'the', 'vortex', 'functional', 'over', 'a', 'compact', 'kahler', 'manifold']] | [-0.16995467806285988, 0.04965946554088302, -0.11032394254707718, 0.06762687220040403, -0.07031771622291982, -0.0662168301897098, 0.028849901204086738, 0.2781595458110718, -0.25475417130167455, -0.24892246396574255, 0.10082400899080636, -0.2199553824093652, -0.2181046817655841, 0.19617756993241914, -0.1383319015842735, 0.05278115958128482, 0.022167813434737595, -0.006654480319112948, -0.09254018182560086, -0.31166259514659084, 0.45740529193785295, -0.037040812671439695, 0.23811326505080477, 0.03822179328024703, 0.12832270794841524, -0.00853928811656796, -0.0664400165096844, -0.005474620027473987, -0.15921609258049563, 0.20788480050555647, 0.23268262716010213, 0.0399694848639814, 0.22691582737184346, -0.39793216070951254, -0.23125886567549347, 0.15265067119457543, 0.09844755802354584, 0.022946029646347645, 0.003325267559338412, -0.2904412998269274, 0.0889577466927944, -0.1159200410754101, -0.15310553347130548, -0.1005780074477502, 0.023382447009319313, 0.020043157525870898, -0.19683035006363914, 0.031361955957972025, 0.06314657962153832, 0.13116155500995785, -0.15036834741955343, -0.039263454195724364, -0.08685720881625805, 0.026960185990502983, 0.06851534315461472, 0.10180564467437973, 0.10622863388582043, -0.10927579235221731, -0.1267949548320309, 0.3084050834765785, -0.17070626097488895, -0.21195688202964422, 0.0705469295841782, -0.11307799245855987, -0.17011900501300212, 0.13677861977827876, 0.1502603426869091, 0.21104745758212592, -0.06579673716364658, 0.18950023073368158, -0.10459703551477766, 0.07156952000414468, 0.11732336636377524, -0.07010266137602802, 0.1208958012651499, 0.1707979479090196, 0.11338175650150197, 0.12056799921245404, -0.04842494051562214, -0.10319520145246427, -0.38643253112390435, -0.2419444343508923, -0.11691878038165096, 0.14433758858948537, -0.11480248533807255, -0.15027220521683562, 0.4594993352099028, 0.03665809223846188, 0.21884403943860814, 0.0840185382913747, 0.1998305959233931, 0.02987142318655571, 0.016102034954712185, 0.07163723952404849, 0.21410258264880475, 0.24070481038078256, 0.14583213702450212, -0.16054055812028684, -0.1225736010692095, 0.24322508385226335] |
1,802.09315 | Aharonov-Bohm conductance oscillations and current equilibration in
local n - p junctions in graphene | We consider a small p-type island defined within n-type graphene nanoribbon
induced by potential of a floating electrode. In the quantum Hall conditions
the island supports persistent currents localized at the $n-p$ junction. When
coupled to the graphene edge the island acts as an Aharonov-Bohm
interferometer. We evaluate the electrostatic potential induced by the floating
gate within the ribbon near the charge neutrality point and consider
equilibration of the currents at both sides of the junction. The incoherent
equilibration is introduced by the virtual probes technique. We describe the
evolution of the coherent Aharonov-Bohm conductance oscillations to the quantum
Hall fractional plateaus due to the current equilibration.
| cond-mat.mes-hall | we consider a small ptype island defined within ntype graphene nanoribbon induced by potential of a floating electrode in the quantum hall conditions the island supports persistent currents localized at the np junction when coupled to the graphene edge the island acts as an aharonovbohm interferometer we evaluate the electrostatic potential induced by the floating gate within the ribbon near the charge neutrality point and consider equilibration of the currents at both sides of the junction the incoherent equilibration is introduced by the virtual probes technique we describe the evolution of the coherent aharonovbohm conductance oscillations to the quantum hall fractional plateaus due to the current equilibration | [['we', 'consider', 'a', 'small', 'ptype', 'island', 'defined', 'within', 'ntype', 'graphene', 'nanoribbon', 'induced', 'by', 'potential', 'of', 'a', 'floating', 'electrode', 'in', 'the', 'quantum', 'hall', 'conditions', 'the', 'island', 'supports', 'persistent', 'currents', 'localized', 'at', 'the', 'np', 'junction', 'when', 'coupled', 'to', 'the', 'graphene', 'edge', 'the', 'island', 'acts', 'as', 'an', 'aharonovbohm', 'interferometer', 'we', 'evaluate', 'the', 'electrostatic', 'potential', 'induced', 'by', 'the', 'floating', 'gate', 'within', 'the', 'ribbon', 'near', 'the', 'charge', 'neutrality', 'point', 'and', 'consider', 'equilibration', 'of', 'the', 'currents', 'at', 'both', 'sides', 'of', 'the', 'junction', 'the', 'incoherent', 'equilibration', 'is', 'introduced', 'by', 'the', 'virtual', 'probes', 'technique', 'we', 'describe', 'the', 'evolution', 'of', 'the', 'coherent', 'aharonovbohm', 'conductance', 'oscillations', 'to', 'the', 'quantum', 'hall', 'fractional', 'plateaus', 'due', 'to', 'the', 'current', 'equilibration']] | [-0.23667395476982972, 0.21478588550656744, -0.042866713976679, 0.04366411513836062, 0.06171586185423918, -0.18139864501726127, 0.08399132368912067, 0.30859708341238934, -0.27824967758399305, -0.2732615255550525, -0.036500630004845006, -0.2756937519412174, -0.13768765777262432, 0.16578177719542356, -0.015099362694336293, 0.019709973843010997, 0.009037826131924848, -0.055533648577353385, -0.05864567452362765, -0.17631868823544583, 0.28664337307058063, 0.03581960543676793, 0.3156317233447438, 0.11598982290303875, 0.04183790023725863, 0.020586145948183452, 0.08511610786108492, 0.05764545761396952, -0.13262676941483853, -0.004385246940949392, 0.20860339188513077, -0.1410073836238306, 0.19005407670199453, -0.5640313967400901, -0.11692339645820522, -0.01215970725970012, 0.08888352307611772, 0.16143115873613925, -0.029195647547456707, -0.326983624660175, 0.05944286273339781, -0.1267031514821313, -0.14371185268876013, 0.03396531139178393, 0.026641269380642346, -0.01611723105649455, -0.21397820312669066, 0.061118048485194414, 0.04417641396486314, 0.01246137779954577, -0.024585498166139995, -0.0867288724430097, -0.07315657036074341, 0.08550851521757867, -0.0267838138181751, 0.015447788654226009, 0.2758959901310225, -0.14485553439828147, -0.16299615819529395, 0.3009159442420318, -0.07669912773471708, -0.13817960403535393, 0.14161342517124645, -0.20425470135931936, 0.02450077506391523, 0.111483709734351, 0.07762359556452063, 0.07951246077743158, -0.1419688695390267, 0.1398961590600274, -0.007561375091078682, 0.05712799924761971, 0.1181437654500157, 0.05537766804831607, 0.3219007448789394, 0.20137512925185402, 0.13396320329265338, 0.1706701560798928, -0.18937516711199673, -0.08331462815752096, -0.3039603547375893, -0.1645621578078543, -0.20661034581912943, 0.13015446394124877, -0.0174287770586208, -0.258320297127607, 0.45350772182448446, 0.13906484889084142, 0.14420438441447914, -0.0887365168239051, 0.30259963201802814, 0.18214401460326685, 0.08891574457009262, 0.04332610337655539, 0.1793937704364865, 0.18021511408570004, 0.11943911200075924, -0.38671342768623695, 0.04464175947724241, 0.008964796054446809] |
1,802.09316 | Effects of Important Parameters Variations on Computing Eigenspace-Based
Minimum Variance Weights for Ultrasound Tissue Harmonic Imaging | In recent years, the minimum variance (MV) beamforming has been widely
studied due to its high resolution and contrast in B-mode Ultrasound imaging
(USI). However, the performance of the MV beamformer is degraded at the
presence of noise, as a result of the inaccurate covariance matrix estimation
which leads to a low quality image. Second harmonic imaging (SHI) provides many
advantages over the conventional pulse-echo USI, such as enhanced axial and
lateral resolutions. However, the low signal-to-noise ratio (SNR) is a major
problem in SHI. In this paper, Eigenspace-based minimum variance (EIBMV)
beamformer has been employed for second harmonic USI. The Tissue Harmonic
Imaging (THI) is achieved by Pulse Inversion (PI) technique. Using the EIBMV
weights, instead of the MV ones, would lead to reduced sidelobes and improved
contrast, without compromising the high resolution of the MV beamformer (even
at the presence of a strong noise). In addition, we have investigated the
effects of variations of the important parameters in computing EIBMV weights,
i.e., K, L, and {\delta}, on the resolution and contrast obtained in SHI. The
results are evaluated using numerical data (using point target and cyst
phantoms), and the proper parameters of EIBMV are indicated for THI.
| eess.SP | in recent years the minimum variance mv beamforming has been widely studied due to its high resolution and contrast in bmode ultrasound imaging usi however the performance of the mv beamformer is degraded at the presence of noise as a result of the inaccurate covariance matrix estimation which leads to a low quality image second harmonic imaging shi provides many advantages over the conventional pulseecho usi such as enhanced axial and lateral resolutions however the low signaltonoise ratio snr is a major problem in shi in this paper eigenspacebased minimum variance eibmv beamformer has been employed for second harmonic usi the tissue harmonic imaging thi is achieved by pulse inversion pi technique using the eibmv weights instead of the mv ones would lead to reduced sidelobes and improved contrast without compromising the high resolution of the mv beamformer even at the presence of a strong noise in addition we have investigated the effects of variations of the important parameters in computing eibmv weights ie k l and delta on the resolution and contrast obtained in shi the results are evaluated using numerical data using point target and cyst phantoms and the proper parameters of eibmv are indicated for thi | [['in', 'recent', 'years', 'the', 'minimum', 'variance', 'mv', 'beamforming', 'has', 'been', 'widely', 'studied', 'due', 'to', 'its', 'high', 'resolution', 'and', 'contrast', 'in', 'bmode', 'ultrasound', 'imaging', 'usi', 'however', 'the', 'performance', 'of', 'the', 'mv', 'beamformer', 'is', 'degraded', 'at', 'the', 'presence', 'of', 'noise', 'as', 'a', 'result', 'of', 'the', 'inaccurate', 'covariance', 'matrix', 'estimation', 'which', 'leads', 'to', 'a', 'low', 'quality', 'image', 'second', 'harmonic', 'imaging', 'shi', 'provides', 'many', 'advantages', 'over', 'the', 'conventional', 'pulseecho', 'usi', 'such', 'as', 'enhanced', 'axial', 'and', 'lateral', 'resolutions', 'however', 'the', 'low', 'signaltonoise', 'ratio', 'snr', 'is', 'a', 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'the', 'proper', 'parameters', 'of', 'eibmv', 'are', 'indicated', 'for', 'thi']] | [-0.09802184194494881, 0.0298924074957531, -0.03153723619887652, 0.011782128137452106, -0.022616000786358163, -0.1315470268100444, 0.016874471438309207, 0.40156574992594035, -0.22776740181947772, -0.32726184870748215, 0.11973547330477168, -0.251870479571619, -0.12934362353410703, 0.18446096625640035, -0.14182971850980597, 0.084546321847104, 0.06531880790339642, -0.0024212879800335997, -0.07972189599189476, -0.2324755410523383, 0.20537212229422738, 0.14057412651840168, 0.32014749542781945, 0.026343259473691632, 0.14057971156657387, 0.017480480823965378, -0.0527686588641668, 0.025494442061619393, -0.0686301640737989, 0.0978115731715716, 0.2594974637043255, 0.09082466952184487, 0.2603409237218974, -0.3670661560161479, -0.24095833437615566, 0.10348261055775249, 0.15351600403050383, 0.07426145273183551, -0.03675345036882121, -0.23875825247030014, 0.12534706439850993, -0.13152712129112615, 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1,802.09317 | A Model of Free Will for Artificial Entities | The impression of free will is the feeling according to which our choices are
neither imposed from our inside nor from outside. It is the sense we are the
ultimate cause of our acts. In direct opposition with the universal
determinism, the existence of free will continues to be discussed. In this
paper, free will is linked to a decisional mechanism: an agent is provided with
free will if having performed a predictable choice Cp, it can immediately
perform another choice Cr in a random way. The intangible feeling of free will
is replaced by a decision-making process including a predictable
decision-making process immediately followed by an unpredictable decisional
one.
| cs.MA cs.AI | the impression of free will is the feeling according to which our choices are neither imposed from our inside nor from outside it is the sense we are the ultimate cause of our acts in direct opposition with the universal determinism the existence of free will continues to be discussed in this paper free will is linked to a decisional mechanism an agent is provided with free will if having performed a predictable choice cp it can immediately perform another choice cr in a random way the intangible feeling of free will is replaced by a decisionmaking process including a predictable decisionmaking process immediately followed by an unpredictable decisional one | [['the', 'impression', 'of', 'free', 'will', 'is', 'the', 'feeling', 'according', 'to', 'which', 'our', 'choices', 'are', 'neither', 'imposed', 'from', 'our', 'inside', 'nor', 'from', 'outside', 'it', 'is', 'the', 'sense', 'we', 'are', 'the', 'ultimate', 'cause', 'of', 'our', 'acts', 'in', 'direct', 'opposition', 'with', 'the', 'universal', 'determinism', 'the', 'existence', 'of', 'free', 'will', 'continues', 'to', 'be', 'discussed', 'in', 'this', 'paper', 'free', 'will', 'is', 'linked', 'to', 'a', 'decisional', 'mechanism', 'an', 'agent', 'is', 'provided', 'with', 'free', 'will', 'if', 'having', 'performed', 'a', 'predictable', 'choice', 'cp', 'it', 'can', 'immediately', 'perform', 'another', 'choice', 'cr', 'in', 'a', 'random', 'way', 'the', 'intangible', 'feeling', 'of', 'free', 'will', 'is', 'replaced', 'by', 'a', 'decisionmaking', 'process', 'including', 'a', 'predictable', 'decisionmaking', 'process', 'immediately', 'followed', 'by', 'an', 'unpredictable', 'decisional', 'one']] | [-0.11281394207511436, 0.18745990613586566, -0.13409399976107209, 0.03467005073130581, -0.13598552754318172, -0.1425792777021839, 0.07551843754362463, 0.3804220828651027, -0.30175974370742387, -0.2504855615002188, 0.125797588925343, -0.24003457311456175, -0.14319480238482357, 0.19084174185991287, -0.15454907367344606, -0.024034229056401686, 0.054524851802059196, 0.11484381557357583, -0.013919214946641164, -0.24343363336308604, 0.30762166621121156, 0.0928858101643114, 0.2609568263742734, 0.050386034316298636, 0.0545462464321066, 0.03256477772850882, -0.04265764626086986, -0.00042421458221559243, -0.08032811898314818, 0.11000727936413816, 0.23336241609332237, 0.16276264495470308, 0.33554016178981827, -0.41576645847579297, -0.16911803025921637, 0.11643535631962798, 0.1323114229196852, 0.08197668220911344, -0.04202698891643773, -0.28585707535649735, 0.0985074522820386, -0.15775725545615635, -0.1551571019269018, -0.04177575738761913, -0.03724032971076667, -0.008424322108145465, -0.2897932291538878, 0.01698423217643391, 0.09509222442707554, 0.014475649506361647, -0.035476471327075904, -0.02978991817852313, -0.025961360240101136, 0.1622180507814681, 0.07012249084602279, 0.03573237416673113, 0.16702541107819838, -0.09421161479655314, -0.11704803217011928, 0.4262850473550233, -0.010775494448501956, -0.2196286433037709, 0.21689615212380886, -0.10962221838470379, -0.09435159908607602, 0.11720267745496875, 0.08230799809733236, 0.06575179281221195, -0.1811910679521547, 0.053853068773804066, -0.03409741522469135, 0.18290899971298957, 0.03734765216200189, -0.02108860169114037, 0.23957632690329445, 0.178309978261082, 0.1084630679169839, 0.10169788845285604, 0.007048972399735992, -0.1117391208906404, -0.36196890295567835, -0.14601189569961703, -0.15437455466863784, 0.0989038115868673, -0.015389551940659824, -0.15119276685978877, 0.33269408383745364, 0.15656646682711486, 0.16121692747216332, -0.002082103563853624, 0.2723925184373828, 0.12455360006689178, 0.06822521467481486, 0.05633853734470904, 0.2139910418878902, 0.034016969374550336, 0.10423690280453725, -0.13815438758306714, 0.17029167323965919, 0.017516430276869374] |
1,802.09318 | Dynamic capillary assembly of colloids at interfaces with 10,000g
accelerations | Extreme deformation of soft matter is central to our understanding of the
effects of shock, fracture, and phase change in a variety of systems. Yet,
despite, the increasing interest in this area, far-from-equilibrium behaviours
of soft matter remain challenging to probe. Colloidal suspensions are often
used to visualise emergent behaviours in soft matter, as they offer precise
control of interparticle interactions, and ease of visualisation by optical
microscopy. However, previous studies have been limited to deformations that
are orders of magnitude too slow to be representative of extreme deformation.
Here we use a two-dimensional model system, a monolayer of colloids confined at
a fluid interface, to probe and visualise the evolution of the microstructure
during high-rate deformation driven by ultrasound. We observe the emergence of
a transient network of strings, and use discrete particle simulations to show
that it is caused by a delicate interplay of dynamic capillarity and
hydrodynamic interactions between particles oscillating at high-frequency.
Remarkably, we find evidence of inertial effects in a colloidal system, caused
by accelerations approaching 10,000g. These results also suggest that extreme
deformation of soft matter offers new opportunities for pattern formation and
dynamic self-assembly.
| cond-mat.soft | extreme deformation of soft matter is central to our understanding of the effects of shock fracture and phase change in a variety of systems yet despite the increasing interest in this area farfromequilibrium behaviours of soft matter remain challenging to probe colloidal suspensions are often used to visualise emergent behaviours in soft matter as they offer precise control of interparticle interactions and ease of visualisation by optical microscopy however previous studies have been limited to deformations that are orders of magnitude too slow to be representative of extreme deformation here we use a twodimensional model system a monolayer of colloids confined at a fluid interface to probe and visualise the evolution of the microstructure during highrate deformation driven by ultrasound we observe the emergence of a transient network of strings and use discrete particle simulations to show that it is caused by a delicate interplay of dynamic capillarity and hydrodynamic interactions between particles oscillating at highfrequency remarkably we find evidence of inertial effects in a colloidal system caused by accelerations approaching 10000g these results also suggest that extreme deformation of soft matter offers new opportunities for pattern formation and dynamic selfassembly | [['extreme', 'deformation', 'of', 'soft', 'matter', 'is', 'central', 'to', 'our', 'understanding', 'of', 'the', 'effects', 'of', 'shock', 'fracture', 'and', 'phase', 'change', 'in', 'a', 'variety', 'of', 'systems', 'yet', 'despite', 'the', 'increasing', 'interest', 'in', 'this', 'area', 'farfromequilibrium', 'behaviours', 'of', 'soft', 'matter', 'remain', 'challenging', 'to', 'probe', 'colloidal', 'suspensions', 'are', 'often', 'used', 'to', 'visualise', 'emergent', 'behaviours', 'in', 'soft', 'matter', 'as', 'they', 'offer', 'precise', 'control', 'of', 'interparticle', 'interactions', 'and', 'ease', 'of', 'visualisation', 'by', 'optical', 'microscopy', 'however', 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1,802.09319 | An Image Registration Based Technique for Noninvasive Vascular
Elastography | Non-invasive vascular elastography is an emerging technique in vascular
tissue imaging. During the past decades, several techniques have been suggested
to estimate the tissue elasticity by measuring the displacement of the Carotid
vessel wall. Cross correlation-based methods are the most prevalent approaches
to measure the strain exerted in the wall vessel by the blood pressure. In the
case of a low pressure, the displacement is too small to be apparent in
ultrasound imaging, especially in the regions far from the center of the
vessel, causing a high error of displacement measurement. On the other hand,
increasing the compression leads to a relatively large displacement in the
regions near the center, which reduces the performance of the cross
correlation-based methods. In this study, a non-rigid image registration-based
technique is proposed to measure the tissue displacement for a relatively large
compression. The results show that the error of the displacement measurement
obtained by the proposed method is reduced by increasing the amount of
compression while the error of the cross correlationbased method rises for a
relatively large compression. We also used the synthetic aperture imaging
method, benefiting the directivity diagram, to improve the image quality,
especially in the superficial regions. The best relative root-mean-square error
(RMSE) of the proposed method and the adaptive cross correlation method were
4.5% and 6%, respectively. Consequently, the proposed algorithm outperforms the
conventional method and reduces the relative RMSE by 25%.
| eess.SP eess.IV | noninvasive vascular elastography is an emerging technique in vascular tissue imaging during the past decades several techniques have been suggested to estimate the tissue elasticity by measuring the displacement of the carotid vessel wall cross correlationbased methods are the most prevalent approaches to measure the strain exerted in the wall vessel by the blood pressure in the case of a low pressure the displacement is too small to be apparent in ultrasound imaging especially in the regions far from the center of the vessel causing a high error of displacement measurement on the other hand increasing the compression leads to a relatively large displacement in the regions near the center which reduces the performance of the cross correlationbased methods in this study a nonrigid image registrationbased technique is proposed to measure the tissue displacement for a relatively large compression the results show that the error of the displacement measurement obtained by the proposed method is reduced by increasing the amount of compression while the error of the cross correlationbased method rises for a relatively large compression we also used the synthetic aperture imaging method benefiting the directivity diagram to improve the image quality especially in the superficial regions the best relative rootmeansquare error rmse of the proposed method and the adaptive cross correlation method were 45 and 6 respectively consequently the proposed algorithm outperforms the conventional method and reduces the relative rmse by 25 | [['noninvasive', 'vascular', 'elastography', 'is', 'an', 'emerging', 'technique', 'in', 'vascular', 'tissue', 'imaging', 'during', 'the', 'past', 'decades', 'several', 'techniques', 'have', 'been', 'suggested', 'to', 'estimate', 'the', 'tissue', 'elasticity', 'by', 'measuring', 'the', 'displacement', 'of', 'the', 'carotid', 'vessel', 'wall', 'cross', 'correlationbased', 'methods', 'are', 'the', 'most', 'prevalent', 'approaches', 'to', 'measure', 'the', 'strain', 'exerted', 'in', 'the', 'wall', 'vessel', 'by', 'the', 'blood', 'pressure', 'in', 'the', 'case', 'of', 'a', 'low', 'pressure', 'the', 'displacement', 'is', 'too', 'small', 'to', 'be', 'apparent', 'in', 'ultrasound', 'imaging', 'especially', 'in', 'the', 'regions', 'far', 'from', 'the', 'center', 'of', 'the', 'vessel', 'causing', 'a', 'high', 'error', 'of', 'displacement', 'measurement', 'on', 'the', 'other', 'hand', 'increasing', 'the', 'compression', 'leads', 'to', 'a', 'relatively', 'large', 'displacement', 'in', 'the', 'regions', 'near', 'the', 'center', 'which', 'reduces', 'the', 'performance', 'of', 'the', 'cross', 'correlationbased', 'methods', 'in', 'this', 'study', 'a', 'nonrigid', 'image', 'registrationbased', 'technique', 'is', 'proposed', 'to', 'measure', 'the', 'tissue', 'displacement', 'for', 'a', 'relatively', 'large', 'compression', 'the', 'results', 'show', 'that', 'the', 'error', 'of', 'the', 'displacement', 'measurement', 'obtained', 'by', 'the', 'proposed', 'method', 'is', 'reduced', 'by', 'increasing', 'the', 'amount', 'of', 'compression', 'while', 'the', 'error', 'of', 'the', 'cross', 'correlationbased', 'method', 'rises', 'for', 'a', 'relatively', 'large', 'compression', 'we', 'also', 'used', 'the', 'synthetic', 'aperture', 'imaging', 'method', 'benefiting', 'the', 'directivity', 'diagram', 'to', 'improve', 'the', 'image', 'quality', 'especially', 'in', 'the', 'superficial', 'regions', 'the', 'best', 'relative', 'rootmeansquare', 'error', 'rmse', 'of', 'the', 'proposed', 'method', 'and', 'the', 'adaptive', 'cross', 'correlation', 'method', 'were', '45', 'and', '6', 'respectively', 'consequently', 'the', 'proposed', 'algorithm', 'outperforms', 'the', 'conventional', 'method', 'and', 'reduces', 'the', 'relative', 'rmse', 'by', '25']] | [-0.05237532844946075, 0.07118774029386725, -0.06695338433735773, 0.026693694635282438, -0.0037857181179679483, -0.08619110400462125, 0.023872653897513404, 0.38179494878356784, 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1,802.0932 | Rare events in networks with internal and external noise | We study rare events in networks with both internal and external noise, and
develop a general formalism for analyzing rare events that combines
pair-quenched techniques and large-deviation theory. The probability
distribution, shape, and time scale of rare events are considered in detail for
extinction in the Susceptible-Infected-Susceptible model as an illustration. We
find that when both types of noise are present, there is a crossover region as
the network size is increased, where the probability exponent for large
deviations no longer increases linearly with the network size. We demonstrate
that the form of the crossover depends on whether the endemic state is
localized near the epidemic threshold or not.
| physics.soc-ph cond-mat.dis-nn | we study rare events in networks with both internal and external noise and develop a general formalism for analyzing rare events that combines pairquenched techniques and largedeviation theory the probability distribution shape and time scale of rare events are considered in detail for extinction in the susceptibleinfectedsusceptible model as an illustration we find that when both types of noise are present there is a crossover region as the network size is increased where the probability exponent for large deviations no longer increases linearly with the network size we demonstrate that the form of the crossover depends on whether the endemic state is localized near the epidemic threshold or not | [['we', 'study', 'rare', 'events', 'in', 'networks', 'with', 'both', 'internal', 'and', 'external', 'noise', 'and', 'develop', 'a', 'general', 'formalism', 'for', 'analyzing', 'rare', 'events', 'that', 'combines', 'pairquenched', 'techniques', 'and', 'largedeviation', 'theory', 'the', 'probability', 'distribution', 'shape', 'and', 'time', 'scale', 'of', 'rare', 'events', 'are', 'considered', 'in', 'detail', 'for', 'extinction', 'in', 'the', 'susceptibleinfectedsusceptible', 'model', 'as', 'an', 'illustration', 'we', 'find', 'that', 'when', 'both', 'types', 'of', 'noise', 'are', 'present', 'there', 'is', 'a', 'crossover', 'region', 'as', 'the', 'network', 'size', 'is', 'increased', 'where', 'the', 'probability', 'exponent', 'for', 'large', 'deviations', 'no', 'longer', 'increases', 'linearly', 'with', 'the', 'network', 'size', 'we', 'demonstrate', 'that', 'the', 'form', 'of', 'the', 'crossover', 'depends', 'on', 'whether', 'the', 'endemic', 'state', 'is', 'localized', 'near', 'the', 'epidemic', 'threshold', 'or', 'not']] | [-0.10537359262040506, 0.15676033593128388, -0.055132146252112255, 0.1383950087851931, 0.011959577890660579, -0.144782369234168, 0.06609117909425145, 0.36707551896365154, -0.23253665613527927, -0.2582924420022647, 0.09319486431626568, -0.30886518659449563, -0.19906194261663282, 0.1573857172107738, -0.02844383649736065, 0.008815884495291996, 0.03372696471504039, 0.0632661994960573, -0.011640839810112354, -0.18169375858269632, 0.33350358822779663, 0.06668117251980153, 0.2986529229760722, 0.037178747459418245, 0.062042369007098454, 0.001702456414932385, -0.010170806423519497, 0.04208833766299196, -0.12851020201701935, 0.009410651004010881, 0.22482375842864039, 0.13836248263854672, 0.26493671169952937, -0.4123924381479069, -0.22163500517813695, 0.1427258580138355, 0.15151331073570032, 0.14594873856684124, -0.03350895251841629, -0.26971146548425573, 0.08113576837004749, -0.14896249877185458, -0.13300285030897982, -0.05863505828677228, 0.07450011632129273, 0.03428761386614362, -0.3013517736517652, 0.11431844767907427, 0.03352864718935625, 0.06472217026856486, -0.014242648047877959, -0.08733197293541808, -0.014910168799192266, 0.12956835119688617, 0.06485146592927372, 0.003243702931622802, 0.15997346693701628, -0.1627299809285129, -0.1001802331302315, 0.330192129748563, -0.06741107595519645, -0.18238973251923365, 0.19047283484272798, -0.18182336972353774, -0.12824292308613183, 0.14762585637746034, 0.20580240059967359, 0.10509457492217836, -0.13659446927973745, 0.05125598053456525, 0.0031795404868683328, 0.19766471214178535, 0.01566729382439344, 0.05210305134608428, 0.1585161213038696, 0.24315335371971336, 0.06803668712921164, 0.1445430912706932, -0.15550683346292418, -0.14732854943981188, -0.3064882213560243, -0.09458667382194916, -0.16065828719486794, 0.03904428147547555, -0.10486152654684028, -0.19169544978757147, 0.35366751559949655, 0.1574632435631766, 0.23179156099946271, 0.09437029262038844, 0.24823209191068868, 0.13481444425027198, 0.011139619750557122, 0.09669726950340662, 0.2178086870817761, 0.06206991895386535, 0.0704438133182487, -0.20501247472754955, 0.14386913755098013, -0.007019621567990355] |
1,802.09321 | Baseline Dependent Averaging in Radio Interferometry | This paper presents a detailed analysis of the applicability and benefits of
baseline dependent averaging (BDA) in modern radio interferometers and in
particular the Square Kilometre Array (SKA). We demonstrate that BDA does not
affect the information content of the data other than a well-defined
decorrelation loss for which closed form expressions are readily available. We
verify these theoretical findings using simulations. We therefore conclude that
BDA can be used reliably in modern radio interferometry allowing a reduction of
visibility data volume (and hence processing costs for handling visibility
data) by more than 80%.
| astro-ph.IM | this paper presents a detailed analysis of the applicability and benefits of baseline dependent averaging bda in modern radio interferometers and in particular the square kilometre array ska we demonstrate that bda does not affect the information content of the data other than a welldefined decorrelation loss for which closed form expressions are readily available we verify these theoretical findings using simulations we therefore conclude that bda can be used reliably in modern radio interferometry allowing a reduction of visibility data volume and hence processing costs for handling visibility data by more than 80 | [['this', 'paper', 'presents', 'a', 'detailed', 'analysis', 'of', 'the', 'applicability', 'and', 'benefits', 'of', 'baseline', 'dependent', 'averaging', 'bda', 'in', 'modern', 'radio', 'interferometers', 'and', 'in', 'particular', 'the', 'square', 'kilometre', 'array', 'ska', 'we', 'demonstrate', 'that', 'bda', 'does', 'not', 'affect', 'the', 'information', 'content', 'of', 'the', 'data', 'other', 'than', 'a', 'welldefined', 'decorrelation', 'loss', 'for', 'which', 'closed', 'form', 'expressions', 'are', 'readily', 'available', 'we', 'verify', 'these', 'theoretical', 'findings', 'using', 'simulations', 'we', 'therefore', 'conclude', 'that', 'bda', 'can', 'be', 'used', 'reliably', 'in', 'modern', 'radio', 'interferometry', 'allowing', 'a', 'reduction', 'of', 'visibility', 'data', 'volume', 'and', 'hence', 'processing', 'costs', 'for', 'handling', 'visibility', 'data', 'by', 'more', 'than', '80']] | [-0.09746394165608278, 0.06603805612812334, -0.08379643296010475, 0.08489565829067748, -0.11549798008847109, -0.11385457088398014, 0.05229477569624345, 0.43881142983569743, -0.21567001164038765, -0.3156503794437393, 0.15695943266396073, -0.27098304147217817, -0.14989676204153357, 0.25410798876397706, -0.04783430905081332, 0.01457471356410137, 0.14195526132429453, -0.047482861483350715, -0.09069546384419849, -0.23894907275531838, 0.21560453899957716, 0.11877309219872063, 0.3335505109280348, 0.0740082276454988, 0.04723088031676796, 0.006618519927910033, -0.09684119805535103, 0.06227847658335529, -0.08595300259819735, 0.1499870794409133, 0.29568355562948084, 0.18919613031036359, 0.2429438005597826, -0.4690630862580989, -0.21984830731897556, 0.08181026788983256, 0.16987805782341736, 0.09804112598810226, -0.018104372056420306, -0.25379569783925693, 0.04945025121188782, -0.19352495599974026, -0.10883179739454484, -0.1091826349605826, -0.01175292958307298, 0.04177556272677859, -0.25423972343931844, 0.07331521221079883, 0.006185683392067539, 0.08117694447208394, -0.01130293881362106, -0.12254631212179332, 0.04900819817533162, 0.11983352206570612, -0.06749838144776035, 0.008669300147262898, 0.11716039992492408, -0.10326857237700135, -0.08940771593652824, 0.38940355970345913, -0.08005642860618846, -0.18604613817173077, 0.16315219002438985, -0.16485837456383842, -0.15616830287778632, 0.10111898219490305, 0.18035075769938053, 0.06275738817590111, -0.17329403430104573, -0.0045255015999267, 0.017197293774323896, 0.22499872312108252, 0.052292168690288, 0.07563525035065856, 0.21842438525252758, 0.1934536995262185, 0.05648269156548888, 0.11921986994368242, -0.1501682035654704, -0.06271102569719895, -0.26965034265625987, -0.12224470000674433, -0.20816439245530266, 0.0395146627414122, -0.09494523145707369, -0.10103191792509182, 0.35475014713642367, 0.21787830336673303, 0.13118162976164233, 0.08216909131969008, 0.36161564162714366, 0.047825039735935784, 0.11611540190023469, 0.06089178132923677, 0.2188800742175985, 0.06302154785210386, 0.1046200956396283, -0.18403646791294376, 0.05340309579797248, -0.06583757817428162] |
1,802.09322 | The concentration-compactness principle for fractional order Sobolev
spaces in unbounded domains and applications to the generalized fractional
Brezis-Nirenberg problem | In this paper we extend the well-known concentration -- compactness principle
for the Fractional Laplacian operator in unbounded domains. As an application
we show sufficient conditions for the existence of solutions to some critical
equations involving the fractional $p-$laplacian in the whole ${\mathbb R}^n$.
| math.AP | in this paper we extend the wellknown concentration compactness principle for the fractional laplacian operator in unbounded domains as an application we show sufficient conditions for the existence of solutions to some critical equations involving the fractional plaplacian in the whole mathbb rn | [['in', 'this', 'paper', 'we', 'extend', 'the', 'wellknown', 'concentration', 'compactness', 'principle', 'for', 'the', 'fractional', 'laplacian', 'operator', 'in', 'unbounded', 'domains', 'as', 'an', 'application', 'we', 'show', 'sufficient', 'conditions', 'for', 'the', 'existence', 'of', 'solutions', 'to', 'some', 'critical', 'equations', 'involving', 'the', 'fractional', 'plaplacian', 'in', 'the', 'whole', 'mathbb', 'rn']] | [-0.1354150322460851, 0.024483139781338207, -0.008688751093740033, 0.0752978183756864, -0.1085445303848923, -0.05363140658063944, -0.04108484298109922, 0.26430930452811163, -0.3108921036297499, -0.1999829858974662, 0.2097910616227404, -0.284937301607326, -0.15920093014489772, 0.17297578100548233, -0.14712875243276358, 0.11469132782414902, 0.0006305891803877298, 0.059676456470908815, -0.0894890158588803, -0.18176597551724247, 0.40917300640843635, -0.13208334704557823, 0.1928226701092235, 0.1378543209284544, 0.046256451217760876, -0.042560365018543114, 0.05811003692513115, -0.0035409614941928277, -0.2580118187984755, 0.1046925074052672, 0.24604789791412132, 0.06466316466414651, 0.3377868172734283, -0.44391215159449465, -0.23740373421893562, 0.19841510304358118, 0.15822509208390878, 0.03010978731651639, -0.08042573549806378, -0.31075261723856595, 0.08932438720190941, -0.08725469489581883, -0.2553215146411297, -0.055020984522131985, 0.048506991786145884, 0.0976262861906096, -0.3423651371930921, 0.14502094850637193, 0.15914054691444995, 0.0035910367489207624, -0.21781189510122287, -0.09503029490452866, 0.011488927051771519, 0.05309239329856842, 0.01374969232372593, -0.018472102958015924, 0.007626177981322588, -0.09978250080048172, -0.1168914056534684, 0.32298093202502226, -0.10210193154337101, -0.31211978331381496, 0.13269840460270643, -0.1742993636100098, -0.16302150825774947, 0.012891632093246593, 0.16060182061262948, 0.21812059318776741, -0.14413314282374326, 0.15603988671805277, -0.05773828187307646, 0.10970604415376518, 0.12017415760648112, 0.04525448908206335, 0.02615092171161154, 0.14265817312826945, 0.2254983328802641, 0.19565562563298575, -0.010374875977462115, -0.10338086790816728, -0.4038200850224902, -0.1875335458492817, -0.16738441605987245, 0.11280771477017985, -0.14923246737656204, -0.1828158985563489, 0.3520935956648616, 0.16745417715093597, 0.16603890358102183, 0.06151371722131274, 0.19603099455233924, 0.1934982093692714, -0.0034596018363223517, 0.042215914465487, 0.13742265286435762, 0.17661787598762055, 0.19330503618301348, -0.21397998268434473, -0.018015404762483613, 0.16075540885199294] |
1,802.09323 | Bulk dynamics of Brownian hard disks: Dynamical density functional
theory versus experiments on two-dimensional colloidal hard spheres | Using dynamical density functional theory (DDFT), we theoretically study
Brownian self-diffusion and structural relaxation of hard disks and compare to
experimental results on quasi two-dimensional colloidal hard spheres. To this
end, we calculate the self and distinct van Hove correlation functions by
extending a recently proposed DDFT-approach for three-dimensional systems to
two dimensions. We find that the theoretical results for both self- and
distinct part of the van Hove function are in very good quantitative agreement
with the experiments up to relatively high fluid packing fractions of roughly
0.60. However, at even higher densities, deviations between experiment and the
theoretical approach become clearly visible. Upon increasing packing fraction,
in experiments the short-time self diffusive behavior is strongly affected by
hydrodynamic effects and leads to a significant decrease in the respective
mean-squared displacement. In contrast, and in accordance with previous
simulation studies, the present DDFT which neglects hydrodynamic effects, shows
no dependence on the particle density for this quantity.
| cond-mat.soft | using dynamical density functional theory ddft we theoretically study brownian selfdiffusion and structural relaxation of hard disks and compare to experimental results on quasi twodimensional colloidal hard spheres to this end we calculate the self and distinct van hove correlation functions by extending a recently proposed ddftapproach for threedimensional systems to two dimensions we find that the theoretical results for both self and distinct part of the van hove function are in very good quantitative agreement with the experiments up to relatively high fluid packing fractions of roughly 060 however at even higher densities deviations between experiment and the theoretical approach become clearly visible upon increasing packing fraction in experiments the shorttime self diffusive behavior is strongly affected by hydrodynamic effects and leads to a significant decrease in the respective meansquared displacement in contrast and in accordance with previous simulation studies the present ddft which neglects hydrodynamic effects shows no dependence on the particle density for this quantity | [['using', 'dynamical', 'density', 'functional', 'theory', 'ddft', 'we', 'theoretically', 'study', 'brownian', 'selfdiffusion', 'and', 'structural', 'relaxation', 'of', 'hard', 'disks', 'and', 'compare', 'to', 'experimental', 'results', 'on', 'quasi', 'twodimensional', 'colloidal', 'hard', 'spheres', 'to', 'this', 'end', 'we', 'calculate', 'the', 'self', 'and', 'distinct', 'van', 'hove', 'correlation', 'functions', 'by', 'extending', 'a', 'recently', 'proposed', 'ddftapproach', 'for', 'threedimensional', 'systems', 'to', 'two', 'dimensions', 'we', 'find', 'that', 'the', 'theoretical', 'results', 'for', 'both', 'self', 'and', 'distinct', 'part', 'of', 'the', 'van', 'hove', 'function', 'are', 'in', 'very', 'good', 'quantitative', 'agreement', 'with', 'the', 'experiments', 'up', 'to', 'relatively', 'high', 'fluid', 'packing', 'fractions', 'of', 'roughly', '060', 'however', 'at', 'even', 'higher', 'densities', 'deviations', 'between', 'experiment', 'and', 'the', 'theoretical', 'approach', 'become', 'clearly', 'visible', 'upon', 'increasing', 'packing', 'fraction', 'in', 'experiments', 'the', 'shorttime', 'self', 'diffusive', 'behavior', 'is', 'strongly', 'affected', 'by', 'hydrodynamic', 'effects', 'and', 'leads', 'to', 'a', 'significant', 'decrease', 'in', 'the', 'respective', 'meansquared', 'displacement', 'in', 'contrast', 'and', 'in', 'accordance', 'with', 'previous', 'simulation', 'studies', 'the', 'present', 'ddft', 'which', 'neglects', 'hydrodynamic', 'effects', 'shows', 'no', 'dependence', 'on', 'the', 'particle', 'density', 'for', 'this', 'quantity']] | [-0.08993495087240153, 0.1457783220303215, -0.11977587516306881, 0.05711379500067419, 0.01356288817396779, -0.09121102742794426, 0.019442521621455336, 0.3753629705044115, -0.21575609834235945, -0.3096780068223264, -0.005178907809773116, -0.3428278901394765, -0.17680189806884924, 0.1741831179294486, 0.0059824886666551514, 0.09474761226691994, 0.03660410001968882, -0.05354369270383932, -0.07690586016222739, -0.20944497084162036, 0.25915896705096697, 0.08146227622007252, 0.2960381741327038, 0.10984809015978389, 0.05355670683643526, 0.03750565317667024, -0.01914758911314806, 0.11184876638162099, -0.21163357583574016, 0.0892593968885055, 0.22584361218621918, -0.0409275595021618, 0.2437063155571224, -0.4403761996513909, -0.2170715962601885, 0.04797742097300424, 0.1366511959991133, 0.09383225819365874, -0.06089850121094685, -0.22267338029364017, 0.07876467975864934, -0.15810359331963073, -0.11802262365506594, -0.0952687335710759, 0.026367191401767028, 0.04084446211123044, -0.21959885006331525, 0.19655633545154408, 0.025191012330043314, 0.054713878246724225, -0.08708692549959204, -0.11174801271112197, 0.008697086890305208, 0.08696558827736006, 0.0633883560639895, 0.028461530432401665, 0.16122931318511818, -0.14696845737920636, -0.08592215185698751, 0.3729915521789793, -0.08877696760612759, -0.17472675475618168, 0.29117819413566476, -0.21239141633016337, -0.13082616062164543, 0.17242331951144774, 0.14067589293477262, 0.061541681919413005, -0.11759455627198243, 0.0488225951850871, -0.021318017051312005, 0.18510932768368796, 0.056082683140085715, 0.0039153850646552356, 0.20452089646866747, 0.1480875292371745, 0.024093897649158195, 0.1370240310533269, -0.06295315349610985, -0.16277285138512873, -0.2579485614729191, -0.12061856949856137, -0.19864982991052235, 0.0022607050349663016, -0.097850163861057, -0.16479326253994162, 0.3352406372666169, 0.12869289253503202, 0.23289405590718149, 0.0981852538271208, 0.2722197951367837, 0.10972753887518552, 0.016703707166016102, 0.025366988053818228, 0.2839211929518326, 0.14194258386536152, 0.10107034113729717, -0.2636062546846736, 0.038240406856498425, 0.04079338439271613] |
1,802.09324 | Random Walks on Polytopes of Constant Corank | We show that the pivoting process associated with one line and $n$ points in
$r$-dimensional space may need $\Omega(\log^r n)$ steps in expectation as $n
\to \infty$. The only cases for which the bound was known previously were for
$r \le 3$. Our lower bound is also valid for the expected number of pivoting
steps in the following applications: (1) The Random-Edge simplex algorithm on
linear programs with $n$ constraints in $d = n - r$ variables; and (2) the
directed random walk on a grid polytope of corank $r$ with $n$ facets.
| cs.DM math.CO | we show that the pivoting process associated with one line and n points in rdimensional space may need omegalogr n steps in expectation as n to infty the only cases for which the bound was known previously were for r le 3 our lower bound is also valid for the expected number of pivoting steps in the following applications 1 the randomedge simplex algorithm on linear programs with n constraints in d n r variables and 2 the directed random walk on a grid polytope of corank r with n facets | [['we', 'show', 'that', 'the', 'pivoting', 'process', 'associated', 'with', 'one', 'line', 'and', 'n', 'points', 'in', 'rdimensional', 'space', 'may', 'need', 'omegalogr', 'n', 'steps', 'in', 'expectation', 'as', 'n', 'to', 'infty', 'the', 'only', 'cases', 'for', 'which', 'the', 'bound', 'was', 'known', 'previously', 'were', 'for', 'r', 'le', '3', 'our', 'lower', 'bound', 'is', 'also', 'valid', 'for', 'the', 'expected', 'number', 'of', 'pivoting', 'steps', 'in', 'the', 'following', 'applications', '1', 'the', 'randomedge', 'simplex', 'algorithm', 'on', 'linear', 'programs', 'with', 'n', 'constraints', 'in', 'd', 'n', 'r', 'variables', 'and', '2', 'the', 'directed', 'random', 'walk', 'on', 'a', 'grid', 'polytope', 'of', 'corank', 'r', 'with', 'n', 'facets']] | [-0.1360072375689116, 0.12339360059445931, -0.035843374887998734, 0.00709013247600928, -0.00951448396469156, -0.22282593112128476, 0.07165912226773799, 0.3521909724507067, -0.23392525732957034, -0.3224465599218901, 0.1155926307456361, -0.307281573354784, -0.11412204437009577, 0.1458374145576575, -0.04036743300449517, 0.07905922413855378, 0.02868341040901012, 0.07804425403268801, -0.02309740856031163, -0.34622458863175576, 0.2625784787064832, -0.004035871620807383, 0.15838691589112083, -0.018593857623636724, 0.05117143644537363, 0.03261425142279929, 0.014074810330445569, 0.017670360490653063, -0.12284810550603045, 0.08075282026289238, 0.23538766813257503, 0.15803557725157588, 0.2405337318778038, -0.39241652951265377, -0.14303466201656395, 0.14108682225277233, 0.19125527415631546, 0.04222491928246907, 0.0399857961339876, -0.1856452800695681, 0.09685757773824864, -0.07306577974102563, -0.1254715790040791, 0.0035934238073726493, 0.14903309039978518, 0.009023059552742376, -0.3481515722763207, -0.012155862760846504, 0.12380551600621806, 0.04610166472072403, 0.03646902857451803, -0.23974225476591124, -0.01273740153087096, 0.06480025921741293, -0.031318125224788676, 0.06510636732952359, 0.05808588649249739, -0.06596283933354749, -0.15118716259797413, 0.34212656209452286, -0.034650598383612105, -0.20672023236337636, 0.13493394713409038, -0.17788928753644642, -0.19608008561707618, 0.13668251236279805, 0.15404015845463923, 0.1833710229438212, -0.011729568462922342, 0.18206867299482432, -0.08994949292391538, 0.15914029565950236, 0.08718150824101435, -0.015067300697167715, 0.0816741086749567, 0.09679640379423897, 0.14998263176853976, 0.11403154314806065, -0.05937301014200784, -0.045785982327328785, -0.34480017862386175, -0.17676816991038827, -0.2439148864087959, 0.0819085795380589, -0.1810326260976985, -0.11661364700024326, 0.29290721093097494, 0.08408893563707048, 0.2478369863082965, 0.14356224830909114, 0.23625962181637686, 0.06629197125633558, 0.014862697178290949, 0.14122394370432528, 0.10171291237283084, 0.09795100674705787, 0.04205794006379114, -0.15078139508970909, 0.05994339112399353, 0.12514012066854371] |
1,802.09325 | Generating subdirect products | We study conditions under which subdirect products of various types of
algebraic structures are finitely generated or finitely presented. In the case
of two factors, we prove general results for arbitrary congruence permutable
varieties, which generalise previously known results for groups, and which
apply to modules, rings, $K$-algebras and loops. For instance, if $C$ is a
fiber product of $A$ and $B$ over a common quotient $D$, and if $A$, $B$ and
$D$ are finitely presented, then $C$ is finitely generated. For subdirect
products of more than two factors we establish a general connection with
projections on pairs of factors and higher commutators. More detailed results
are provided for groups, loops, rings and $K$-algebras. In particular, let $C$
be a subdirect product of $K$-algebras $A_1,\dots,A_n$ for a Noetherian ring
$K$ such that the projection of $C$ onto any $A_i\times A_j$ has finite co-rank
in $A_i\times A_j$. Then $C$ is finitely generated (resp. finitely presented)
if and only if all $A_i$ are finitely generated (resp. finitely presented).
Finally, examples of semigroups and lattices are provided which indicate
further complications as one ventures beyond congruence permutable varieties.
| math.RA math.GR | we study conditions under which subdirect products of various types of algebraic structures are finitely generated or finitely presented in the case of two factors we prove general results for arbitrary congruence permutable varieties which generalise previously known results for groups and which apply to modules rings kalgebras and loops for instance if c is a fiber product of a and b over a common quotient d and if a b and d are finitely presented then c is finitely generated for subdirect products of more than two factors we establish a general connection with projections on pairs of factors and higher commutators more detailed results are provided for groups loops rings and kalgebras in particular let c be a subdirect product of kalgebras a_1dotsa_n for a noetherian ring k such that the projection of c onto any a_itimes a_j has finite corank in a_itimes a_j then c is finitely generated resp finitely presented if and only if all a_i are finitely generated resp finitely presented finally examples of semigroups and lattices are provided which indicate further complications as one ventures beyond congruence permutable varieties | [['we', 'study', 'conditions', 'under', 'which', 'subdirect', 'products', 'of', 'various', 'types', 'of', 'algebraic', 'structures', 'are', 'finitely', 'generated', 'or', 'finitely', 'presented', 'in', 'the', 'case', 'of', 'two', 'factors', 'we', 'prove', 'general', 'results', 'for', 'arbitrary', 'congruence', 'permutable', 'varieties', 'which', 'generalise', 'previously', 'known', 'results', 'for', 'groups', 'and', 'which', 'apply', 'to', 'modules', 'rings', 'kalgebras', 'and', 'loops', 'for', 'instance', 'if', 'c', 'is', 'a', 'fiber', 'product', 'of', 'a', 'and', 'b', 'over', 'a', 'common', 'quotient', 'd', 'and', 'if', 'a', 'b', 'and', 'd', 'are', 'finitely', 'presented', 'then', 'c', 'is', 'finitely', 'generated', 'for', 'subdirect', 'products', 'of', 'more', 'than', 'two', 'factors', 'we', 'establish', 'a', 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1,802.09326 | Dimension of CPT posets | A collection of linear orders on $X$, say $\mathcal{L}$, is said to
\emph{realize} a partially ordered set (or poset) $\mathcal{P} = (X, \preceq)$
if, for any two distinct $x,y \in X$, $x \preceq y$ if and only if $x \prec_L
y$, $\forall L \in \mathcal{L}$. We call $\mathcal{L}$ a \emph{realizer} of
$\mathcal{P}$. The \emph{dimension} of $\mathcal{P}$, denoted by
$dim(\mathcal{P})$, is the minimum cardinality of a realizer of $\mathcal{P}$.
A \emph{containment model} $M_{\mathcal{P}}$ of a poset
$\mathcal{P}=(X,\preceq)$ maps every $x \in X$ to a set $M_x$ such that, for
every distinct $x,y \in X,\ x \preceq y$ if and only if $M_x \varsubsetneq
M_y$. We shall be using the collection $(M_x)_{x \in X}$ to identify the
containment model $M_{\mathcal{P}}$. A poset $\mathcal{P}=(X,\preceq)$ is a
Containment order of Paths in a Tree (CPT poset), if it admits a containment
model $M_{\mathcal{P}}=(P_x)_{x \in X}$ where every $P_x$ is a path of a tree
$T$, which is called the host tree of the model.
We show that if a poset $\mathcal{P}$ admits a CPT model in a host tree $T$
of maximum degree $\Delta$ and radius $r$, then \rogers{$dim(\mathcal{P}) \leq
\lg\lg \Delta + (\frac{1}{2} + o(1))\lg\lg\lg \Delta + \lg r + \frac{1}{2}
\lg\lg r + \frac{1}{2}\lg \pi + 3$. This bound is asymptotically tight up to an
additive factor of $\min(\frac{1}{2}\lg\lg\lg \Delta, \frac{1}{2}\lg\lg r)$.
Further, let $\mathcal{P}(1,2;n)$ be the poset consisting of all the
$1$-element and $2$-element subsets of $[n]$ under `containment' relation and
let $dim(1,2;n)$ denote its dimension. The proof of our main theorem gives a
simple algorithm to construct a realizer for $\mathcal{P}(1,2;n)$ whose
cardinality is only an additive factor of at most $\frac{3}{2}$ away from the
optimum.
| math.CO cs.DM | a collection of linear orders on x say mathcall is said to emphrealize a partially ordered set or poset mathcalp x preceq if for any two distinct xy in x x preceq y if and only if x prec_l y forall l in mathcall we call mathcall a emphrealizer of mathcalp the emphdimension of mathcalp denoted by dimmathcalp is the minimum cardinality of a realizer of mathcalp a emphcontainment model m_mathcalp of a poset mathcalpxpreceq maps every x in x to a set m_x such that for every distinct xy in x x preceq y if and only if m_x varsubsetneq m_y we shall be using the collection m_x_x in x to identify the containment model m_mathcalp a poset mathcalpxpreceq is a containment order of paths in a tree cpt poset if it admits a containment model m_mathcalpp_x_x in x where every p_x is a path of a tree t which is called the host tree of the model we show that if a poset mathcalp admits a cpt model in a host tree t of maximum degree delta and radius r then rogersdimmathcalp leq lglg delta frac12 o1lglglg delta lg r frac12 lglg r frac12lg pi 3 this bound is asymptotically tight up to an additive factor of minfrac12lglglg delta frac12lglg r further let mathcalp12n be the poset consisting of all the 1element and 2element subsets of n under containment relation and let dim12n denote its dimension the proof of our main theorem gives a simple algorithm to construct a realizer for mathcalp12n whose cardinality is only an additive factor of at most frac32 away from the optimum | [['a', 'collection', 'of', 'linear', 'orders', 'on', 'x', 'say', 'mathcall', 'is', 'said', 'to', 'emphrealize', 'a', 'partially', 'ordered', 'set', 'or', 'poset', 'mathcalp', 'x', 'preceq', 'if', 'for', 'any', 'two', 'distinct', 'xy', 'in', 'x', 'x', 'preceq', 'y', 'if', 'and', 'only', 'if', 'x', 'prec_l', 'y', 'forall', 'l', 'in', 'mathcall', 'we', 'call', 'mathcall', 'a', 'emphrealizer', 'of', 'mathcalp', 'the', 'emphdimension', 'of', 'mathcalp', 'denoted', 'by', 'dimmathcalp', 'is', 'the', 'minimum', 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1,802.09327 | Study on cosmogenic activation in germanium detectors for future
tonne-scale CDEX experiment | A study on cosmogenic activation in germanium was carried out to evaluate the
cosmogenic background level of natural and $^{70}$Ge depleted germanium
detectors. The production rates of long-lived radionuclides were calculated
with Geant4 and CRY. Results were validated by comparing the simulated and
experimental spectra of CDEX-1B detector. Based on the validated codes, the
cosmogenic background level was predicted for further tonne-scale CDEX
experiment. The suppression of cosmogenic background level could be achieved by
underground germanium crystal growth and high-purity germanium detector
fabrication to reach the sensitivity requirement for direct detection of dark
matter. With the low cosmogenic background, new physics channels, such as solar
neutrino research and neutrinoless double-beta decay experiments, were opened
and the corresponding simulations and evaluations were carried out.
| physics.ins-det astro-ph.IM hep-ex | a study on cosmogenic activation in germanium was carried out to evaluate the cosmogenic background level of natural and 70ge depleted germanium detectors the production rates of longlived radionuclides were calculated with geant4 and cry results were validated by comparing the simulated and experimental spectra of cdex1b detector based on the validated codes the cosmogenic background level was predicted for further tonnescale cdex experiment the suppression of cosmogenic background level could be achieved by underground germanium crystal growth and highpurity germanium detector fabrication to reach the sensitivity requirement for direct detection of dark matter with the low cosmogenic background new physics channels such as solar neutrino research and neutrinoless doublebeta decay experiments were opened and the corresponding simulations and evaluations were carried out | [['a', 'study', 'on', 'cosmogenic', 'activation', 'in', 'germanium', 'was', 'carried', 'out', 'to', 'evaluate', 'the', 'cosmogenic', 'background', 'level', 'of', 'natural', 'and', '70ge', 'depleted', 'germanium', 'detectors', 'the', 'production', 'rates', 'of', 'longlived', 'radionuclides', 'were', 'calculated', 'with', 'geant4', 'and', 'cry', 'results', 'were', 'validated', 'by', 'comparing', 'the', 'simulated', 'and', 'experimental', 'spectra', 'of', 'cdex1b', 'detector', 'based', 'on', 'the', 'validated', 'codes', 'the', 'cosmogenic', 'background', 'level', 'was', 'predicted', 'for', 'further', 'tonnescale', 'cdex', 'experiment', 'the', 'suppression', 'of', 'cosmogenic', 'background', 'level', 'could', 'be', 'achieved', 'by', 'underground', 'germanium', 'crystal', 'growth', 'and', 'highpurity', 'germanium', 'detector', 'fabrication', 'to', 'reach', 'the', 'sensitivity', 'requirement', 'for', 'direct', 'detection', 'of', 'dark', 'matter', 'with', 'the', 'low', 'cosmogenic', 'background', 'new', 'physics', 'channels', 'such', 'as', 'solar', 'neutrino', 'research', 'and', 'neutrinoless', 'doublebeta', 'decay', 'experiments', 'were', 'opened', 'and', 'the', 'corresponding', 'simulations', 'and', 'evaluations', 'were', 'carried', 'out']] | [0.014509771677634876, 0.24984748290802092, -0.008319692036373632, 0.1082570601529518, 0.037801440463584586, -0.10549133763740175, 0.04557981340359652, 0.357074788103613, -0.1271619218836737, -0.40116169622748116, 0.040618126438052744, -0.3904079640719307, -0.02872886151441785, 0.26603155233611003, 0.06489205886380839, 0.12851835486143218, 0.1382494736720472, -0.007522439839868027, -0.07089810824922485, -0.2556240746911737, 0.18323150626835488, 0.29951173187706803, 0.32800953223018864, 0.10304573634028678, 0.09677366564836597, -0.10421460116526386, -0.11196069552450533, -0.07684838374254588, -0.12050855602519434, 0.039119444939223896, 0.3082494321775424, 0.1266119358870277, 0.07556660896449609, -0.49267068565594124, -0.2023586022808812, 0.11581587743731674, 0.06365273485235015, 0.022478018238468737, -0.18260404634190205, -0.4091426271689506, 0.1413081590177827, -0.1887253599897882, -0.039197377539926866, -0.011287131262790472, -0.10059537301908751, 0.0012081557370485646, -0.22753758400251142, 0.020223663751509222, -0.11898079307246037, 0.05160288524348289, -0.07926200180444255, -0.21585244061921524, 0.03950885149696078, 0.05274973176973185, 0.07385332275517896, -0.04772695603414981, 0.287916178168103, -0.10147586510440126, -0.12282227342337614, 0.31866833656934684, -0.09883658641559973, -0.07908804469682719, 0.13683566634856226, -0.1644477553133181, -0.1006883024161712, 0.21885166986708027, 0.16843785532152844, 0.08587075650050748, -0.21303623816242717, 0.0724777030674111, 0.04986517560156826, 0.18918825920717028, 0.11158416962125109, 0.00358960569882002, 0.2607724536744664, 0.3231004406774386, -0.011904278976201523, 0.07165310378415418, -0.23811194855819043, 0.02881278916735385, -0.31301465118303895, -0.1677568011657625, -0.07719879966137595, 0.07284619303832411, 0.03425393998348555, -0.10500222453694852, 0.37792410995414266, 0.09065247053036192, 0.0769534723920992, -0.03339957642048353, 0.2642078825881415, 0.010872472313301424, 0.06126809782791333, -0.06489322835304698, 0.34845987784096083, 0.1487939111033424, 0.06591617209134532, -0.2688823516984455, 0.07428001431217722, 0.00289723363353825] |
1,802.09328 | Revisiting Transmission Scheduling in RF Energy Harvesting Wireless
Communications | The transmission scheduling is a critical problem in radio frequency (RF)
energy harvesting communications. Existing transmission strategies in an
RF-based energy harvesting system is mainly based on a classic model, in which
the data transmission is scheduled in a fixed feasible energy tunnel. In this
paper, we re-examine the classic energy harvesting model and show through the
theoretical analysis and experimental results that the bounds of feasible
energy tunnel are dynamic, which can be affected by the transmission scheduling
due to the impact of residual energy on the harvested one. To describe a
practical energy harvesting process more accurately, a new model is proposed by
adding a feedback loop that reflects the interplay between the energy harvest
and the data transmission. Furthermore, to improve network performance, we
revisit the design of an optimal transmission scheduling strategy based on the
new model. To handle the challenge of the endless feedback loop in the new
model, a recursive algorithm is developed. The simulation results reveal that
the new transmission scheduling strategy can balance the efficiency of energy
reception and energy utilization regardless of the length of energy packets,
achieving improved throughput performance for wireless communications.
| eess.SP | the transmission scheduling is a critical problem in radio frequency rf energy harvesting communications existing transmission strategies in an rfbased energy harvesting system is mainly based on a classic model in which the data transmission is scheduled in a fixed feasible energy tunnel in this paper we reexamine the classic energy harvesting model and show through the theoretical analysis and experimental results that the bounds of feasible energy tunnel are dynamic which can be affected by the transmission scheduling due to the impact of residual energy on the harvested one to describe a practical energy harvesting process more accurately a new model is proposed by adding a feedback loop that reflects the interplay between the energy harvest and the data transmission furthermore to improve network performance we revisit the design of an optimal transmission scheduling strategy based on the new model to handle the challenge of the endless feedback loop in the new model a recursive algorithm is developed the simulation results reveal that the new transmission scheduling strategy can balance the efficiency of energy reception and energy utilization regardless of the length of energy packets achieving improved throughput performance for wireless communications | [['the', 'transmission', 'scheduling', 'is', 'a', 'critical', 'problem', 'in', 'radio', 'frequency', 'rf', 'energy', 'harvesting', 'communications', 'existing', 'transmission', 'strategies', 'in', 'an', 'rfbased', 'energy', 'harvesting', 'system', 'is', 'mainly', 'based', 'on', 'a', 'classic', 'model', 'in', 'which', 'the', 'data', 'transmission', 'is', 'scheduled', 'in', 'a', 'fixed', 'feasible', 'energy', 'tunnel', 'in', 'this', 'paper', 'we', 'reexamine', 'the', 'classic', 'energy', 'harvesting', 'model', 'and', 'show', 'through', 'the', 'theoretical', 'analysis', 'and', 'experimental', 'results', 'that', 'the', 'bounds', 'of', 'feasible', 'energy', 'tunnel', 'are', 'dynamic', 'which', 'can', 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1,802.09329 | Direct observation of multi-spinon excitations outside of the two-spinon
continuum in the antiferromagnetic spin chain cuprate Sr2CuO3 | One-dimensional (1D) magnetic insulators have attracted significant interest
as a platform for studying emergent phenomena such as quasiparticle
fractionalization and quantum criticality. The antiferromagnetic Heisenberg
chain of spins-1/2 is an important reference system; its elementary excitations
are spin-1/2 quasiparticles called spinons that are always created in pairs.
However, while inelastic neutron scattering (INS) experiments routinely observe
the excitation continuum associated with two-spinon states, the presence of
more complex dynamics associated with four-spinon states has only been inferred
from comparison with theory. Here, we show that resonant inelastic x-ray
scattering (RIXS) is capable of accessing the four-spinon excitations directly,
in a spectroscopic region separated from the two-spinon continuum. Our results
provide the first direct measurement of four-spinon excitations, which is made
possible by the fundamentally different correlation functions probed by RIXS
compared to INS. This advance holds great promise as a tool in the search for
novel quantum states, in particular quantum spin liquids.
| cond-mat.str-el cond-mat.mtrl-sci | onedimensional 1d magnetic insulators have attracted significant interest as a platform for studying emergent phenomena such as quasiparticle fractionalization and quantum criticality the antiferromagnetic heisenberg chain of spins12 is an important reference system its elementary excitations are spin12 quasiparticles called spinons that are always created in pairs however while inelastic neutron scattering ins experiments routinely observe the excitation continuum associated with twospinon states the presence of more complex dynamics associated with fourspinon states has only been inferred from comparison with theory here we show that resonant inelastic xray scattering rixs is capable of accessing the fourspinon excitations directly in a spectroscopic region separated from the twospinon continuum our results provide the first direct measurement of fourspinon excitations which is made possible by the fundamentally different correlation functions probed by rixs compared to ins this advance holds great promise as a tool in the search for novel quantum states in particular quantum spin liquids | [['onedimensional', '1d', 'magnetic', 'insulators', 'have', 'attracted', 'significant', 'interest', 'as', 'a', 'platform', 'for', 'studying', 'emergent', 'phenomena', 'such', 'as', 'quasiparticle', 'fractionalization', 'and', 'quantum', 'criticality', 'the', 'antiferromagnetic', 'heisenberg', 'chain', 'of', 'spins12', 'is', 'an', 'important', 'reference', 'system', 'its', 'elementary', 'excitations', 'are', 'spin12', 'quasiparticles', 'called', 'spinons', 'that', 'are', 'always', 'created', 'in', 'pairs', 'however', 'while', 'inelastic', 'neutron', 'scattering', 'ins', 'experiments', 'routinely', 'observe', 'the', 'excitation', 'continuum', 'associated', 'with', 'twospinon', 'states', 'the', 'presence', 'of', 'more', 'complex', 'dynamics', 'associated', 'with', 'fourspinon', 'states', 'has', 'only', 'been', 'inferred', 'from', 'comparison', 'with', 'theory', 'here', 'we', 'show', 'that', 'resonant', 'inelastic', 'xray', 'scattering', 'rixs', 'is', 'capable', 'of', 'accessing', 'the', 'fourspinon', 'excitations', 'directly', 'in', 'a', 'spectroscopic', 'region', 'separated', 'from', 'the', 'twospinon', 'continuum', 'our', 'results', 'provide', 'the', 'first', 'direct', 'measurement', 'of', 'fourspinon', 'excitations', 'which', 'is', 'made', 'possible', 'by', 'the', 'fundamentally', 'different', 'correlation', 'functions', 'probed', 'by', 'rixs', 'compared', 'to', 'ins', 'this', 'advance', 'holds', 'great', 'promise', 'as', 'a', 'tool', 'in', 'the', 'search', 'for', 'novel', 'quantum', 'states', 'in', 'particular', 'quantum', 'spin', 'liquids']] | [-0.13084544566402126, 0.23958606476177616, -0.06273965918294647, 0.09718307323321651, -0.04689251827502173, -0.160595806132929, 0.02446432576326081, 0.3777603710593741, -0.2418401951298994, -0.248968288879172, -0.0011999475415126464, -0.3698666518694094, -0.12267022732732014, 0.20856546090301004, 0.10579212678096477, 0.07021405481470115, 0.046378976858701876, -0.0036099832716133154, -0.05272898097785823, -0.16080185596365482, 0.28853698136601474, 0.035656000237175405, 0.2938688507385771, 0.09236676159643513, 0.0382361761948666, 0.08014609981244551, 0.07595420995228042, -0.009743694340798005, -0.09800193972287934, 0.08584536663393545, 0.33251827084794155, -0.032910263938890176, 0.16010377660683422, -0.4490787443138805, -0.2600678241099505, 0.03019223928086694, 0.20951207318142348, 0.14649847726066736, -0.08345920826413812, -0.3385267431659052, 0.0037744552805544992, -0.18534428135376252, -0.13035003905788708, -0.15138117295501183, -0.007191391415236627, -0.01701878204681527, -0.1890843375844674, 0.0860121362858598, 0.05626419089731511, 0.0790710446479566, -0.0805420005211631, -0.09293989247560282, -0.04008891192277029, 0.0921405524006296, 0.014711516116459678, 0.04699130766580697, 0.10633997046053896, -0.14598752648548338, -0.20729310824528177, 0.3733474758059529, -0.03336095604383588, -0.11575259684335465, 0.21418015566636242, -0.16395690289989504, -0.1408656678136645, 0.18210284454516726, 0.08179644918566861, 0.10572888146404152, -0.1422752801608903, 0.06619192105284252, -0.0884166442784572, 0.19003309074350255, -0.006840940027686408, 0.15491037250472098, 0.2962463490506695, 0.1852477587697863, 0.009605879221245452, 0.14440773125719644, -0.12727858902153874, -0.09423828083950284, -0.22595966762857012, -0.13660905209789967, -0.253493612075188, 0.09053479452325287, 0.005795820353965859, -0.1495822707900254, 0.35573413651710484, 0.13575544659093805, 0.17402040285840342, -0.04834604361231493, 0.24504695646769178, 0.1369092771798689, 0.062397911015508414, 0.033051037433514605, 0.25047675689098003, 0.17110617719651536, 0.08270429160896373, -0.2751640523692556, 0.034805919660036176, 0.003848591359831344] |
1,802.0933 | On the Well-Posedness of a Parametric Spectral Estimation Problem and
Its Numerical Solution | This paper concerns a spectral estimation problem in which we want to find a
spectral density function that is consistent with estimated second-order
statistics. It is an inverse problem admitting multiple solutions, and
selection of a solution can be based on prior functions. We show that the
problem is well-posed when formulated in a parametric fashion, and that the
solution parameter depends continuously on the prior function. In this way, we
are able to obtain a smooth parametrization of admissible spectral densities.
Based on this result, the problem is reparametrized via a bijective change of
variables out of a numerical consideration, and then a continuation method is
used to compute the unique solution parameter. Numerical aspects such as
convergence of the proposed algorithm and certain computational procedures are
addressed. A simple example is provided to show the effectiveness of the
algorithm.
| math.OC | this paper concerns a spectral estimation problem in which we want to find a spectral density function that is consistent with estimated secondorder statistics it is an inverse problem admitting multiple solutions and selection of a solution can be based on prior functions we show that the problem is wellposed when formulated in a parametric fashion and that the solution parameter depends continuously on the prior function in this way we are able to obtain a smooth parametrization of admissible spectral densities based on this result the problem is reparametrized via a bijective change of variables out of a numerical consideration and then a continuation method is used to compute the unique solution parameter numerical aspects such as convergence of the proposed algorithm and certain computational procedures are addressed a simple example is provided to show the effectiveness of the algorithm | [['this', 'paper', 'concerns', 'a', 'spectral', 'estimation', 'problem', 'in', 'which', 'we', 'want', 'to', 'find', 'a', 'spectral', 'density', 'function', 'that', 'is', 'consistent', 'with', 'estimated', 'secondorder', 'statistics', 'it', 'is', 'an', 'inverse', 'problem', 'admitting', 'multiple', 'solutions', 'and', 'selection', 'of', 'a', 'solution', 'can', 'be', 'based', 'on', 'prior', 'functions', 'we', 'show', 'that', 'the', 'problem', 'is', 'wellposed', 'when', 'formulated', 'in', 'a', 'parametric', 'fashion', 'and', 'that', 'the', 'solution', 'parameter', 'depends', 'continuously', 'on', 'the', 'prior', 'function', 'in', 'this', 'way', 'we', 'are', 'able', 'to', 'obtain', 'a', 'smooth', 'parametrization', 'of', 'admissible', 'spectral', 'densities', 'based', 'on', 'this', 'result', 'the', 'problem', 'is', 'reparametrized', 'via', 'a', 'bijective', 'change', 'of', 'variables', 'out', 'of', 'a', 'numerical', 'consideration', 'and', 'then', 'a', 'continuation', 'method', 'is', 'used', 'to', 'compute', 'the', 'unique', 'solution', 'parameter', 'numerical', 'aspects', 'such', 'as', 'convergence', 'of', 'the', 'proposed', 'algorithm', 'and', 'certain', 'computational', 'procedures', 'are', 'addressed', 'a', 'simple', 'example', 'is', 'provided', 'to', 'show', 'the', 'effectiveness', 'of', 'the', 'algorithm']] | [-0.08579478589883933, -0.0009208113467609774, -0.1395670220698395, 0.06014960702568134, -0.10027338877148556, -0.10104558843762633, 0.048841199065651084, 0.3949113490575172, -0.2901337898488269, -0.27812904858605025, 0.13901113077101515, -0.2181259986879684, -0.2031669302831952, 0.20096509373938362, -0.08720973695146171, 0.09408258251079642, 0.07187414221244316, 0.034596598740165116, -0.0984712412881381, -0.23562087496108514, 0.3309699238760146, 0.018995998215907854, 0.2740226627215215, 0.05626815230856445, 0.14760461179638637, -0.0129467352518006, -0.02418824809385424, 0.04484579374713176, -0.15595883363439886, 0.10531843133957673, 0.2592728903058071, 0.17190856303266705, 0.31525081487253626, -0.352104728182791, -0.20459824493353038, 0.13043459994117365, 0.15263544205338397, 0.09358397105639364, -0.052168464118859184, -0.23325914600269593, 0.1029994726801912, -0.14743928025094363, -0.11318903664087361, -0.09462166838645142, -0.02679473438121854, 0.03343606155022239, -0.35316157506957174, 0.06462942045314092, 0.03889072199966362, -0.007121357478941164, -0.08586135901286142, -0.06839861167290955, 0.019115829150066942, 0.07779026477278131, 0.06115754951263864, 0.04157877508682985, 0.07330063882478717, -0.09165126451535534, -0.08791140043209736, 0.3583489200822738, -0.05099774882525985, -0.2899541719849651, 0.15733644962872226, -0.080791611612464, -0.12732734485258554, 0.11374500934166688, 0.1556627622554541, 0.1860342028993347, -0.1394457179143346, 0.09961643417577214, -0.07369520488535285, 0.18740112753254726, 0.017151455401528813, -0.033977684231329686, 0.1476700427671168, 0.16375348766017309, 0.1292508258385227, 0.15828293597520535, -0.03407978868039312, -0.07878488448204089, -0.31728697723770144, -0.1331531586231175, -0.21229144431492117, 0.029492938484838034, -0.08612570805922613, -0.18569379706094238, 0.41230707952475293, 0.15799665952048508, 0.2294235269585294, 0.07020783865682331, 0.29496483702265414, 0.1930574713570416, 0.005271455661908901, 0.07898039851628297, 0.20381894057735483, 0.09600584418265189, 0.054216735008839806, -0.20054558491340924, 0.06431782855949503, 0.09499879758507807] |
1,802.09331 | Fisher Information Perspective of Pauli's Electron | A non relativistic electron with a spin is described by Pauli's equation. It
has been shown that this system can be interpreted as a vortical fluid which
has both similarities and differences with classical ideal flows. Moreover, it
was demonstrated that the internal energy of the spin fluid can partially be
interpreted in terms of Fisher Information. While previous work on the subject
has mainly ignored electromagnetic fields which are represented by a vector
potential here we remove this limitation and study the system under general
electromagnetic interaction.
| cond-mat.other physics.flu-dyn quant-ph | a non relativistic electron with a spin is described by paulis equation it has been shown that this system can be interpreted as a vortical fluid which has both similarities and differences with classical ideal flows moreover it was demonstrated that the internal energy of the spin fluid can partially be interpreted in terms of fisher information while previous work on the subject has mainly ignored electromagnetic fields which are represented by a vector potential here we remove this limitation and study the system under general electromagnetic interaction | [['a', 'non', 'relativistic', 'electron', 'with', 'a', 'spin', 'is', 'described', 'by', 'paulis', 'equation', 'it', 'has', 'been', 'shown', 'that', 'this', 'system', 'can', 'be', 'interpreted', 'as', 'a', 'vortical', 'fluid', 'which', 'has', 'both', 'similarities', 'and', 'differences', 'with', 'classical', 'ideal', 'flows', 'moreover', 'it', 'was', 'demonstrated', 'that', 'the', 'internal', 'energy', 'of', 'the', 'spin', 'fluid', 'can', 'partially', 'be', 'interpreted', 'in', 'terms', 'of', 'fisher', 'information', 'while', 'previous', 'work', 'on', 'the', 'subject', 'has', 'mainly', 'ignored', 'electromagnetic', 'fields', 'which', 'are', 'represented', 'by', 'a', 'vector', 'potential', 'here', 'we', 'remove', 'this', 'limitation', 'and', 'study', 'the', 'system', 'under', 'general', 'electromagnetic', 'interaction']] | [-0.13566102282096504, 0.15917815693749368, -0.10633615538245067, 0.05783115070583087, -0.05803017603995448, -0.10774847180370918, -0.044127081039319324, 0.3388932318961121, -0.26884533269648353, -0.3050038508901542, 0.09922093723964115, -0.25461742345942184, -0.155929387084391, 0.17545652342960238, -0.032231363489038566, 0.03342139354473064, 0.03703160925810649, 0.06882964260347019, -0.028262707500041208, -0.19597461743978783, 0.3314612883947451, 0.07366191913619828, 0.2622785968018103, 0.0702710144125211, 0.12963346057354516, -0.0010372533883624287, -0.009373102146624164, 0.12735269941516558, -0.0620071084447938, 0.06027151756147346, 0.22219075620523654, 0.044921111953127285, 0.2540980357126417, -0.4430832565042444, -0.3182436000259424, 0.08773947236741977, 0.16120504143923012, 0.13329298165097664, -0.05946126752347813, -0.30042899208439683, 0.04729323635216464, -0.21522939872573427, -0.10343333179215816, -0.10705597819337113, 0.0023522125821645286, 0.023376875088036864, -0.21452698774043133, 0.09011523108082739, 0.11977275685984007, 0.02965830872893672, -0.05293319593924521, -0.07778746700205375, -0.040768677680964836, 0.07752690627239645, 0.07565243553968189, 0.08295015086531005, 0.11263145637084646, -0.12007149831201373, -0.11456627968899821, 0.41515184291215107, -0.07400363520983691, -0.2783134312749925, 0.19108849817844617, -0.12029731975847179, -0.055583267340394246, 0.11565416520038112, 0.14059388657650826, 0.06935917882418091, -0.20901894049761308, 0.11007677303206781, -0.08788277062756772, 0.12576203990664164, 0.0649806654705158, 0.025682420531335414, 0.24951957513324238, 0.12681336836381393, -0.007078584558753805, 0.13873596415082415, -0.04654314414206469, -0.0911906381687996, -0.2489667711356147, -0.14639548410725017, -0.21647879728962752, 0.07342567656252702, 0.005813981899171433, -0.11291141197480928, 0.37702979759143834, 0.12624604128690076, 0.1421548447370614, -0.053805184151067144, 0.2864325277253308, 0.17463481335091108, 0.0593331236212345, 0.08015502540828576, 0.31131571394772356, 0.1709058829001151, 0.10834029623501093, -0.21669584945034745, 0.0796089040231891, 0.017338956018317152] |
1,802.09332 | Parsimonious Network based on Fuzzy Inference System (PANFIS) for Time
Series Feature Prediction of Low Speed Slew Bearing Prognosis | In recent years, the utilization of rotating parts, e.g. bearings and gears,
has been continuously supporting the manufacturing line to produce consistent
output quality. Due to their critical role, the breakdown of these components
might significantly impact the production rate. A proper condition based
monitoring (CBM) is among a few ways to maintain and monitor the rotating
systems. Prognosis, as one of the major tasks in CBM that predicts and
estimates the remaining useful life of the machine, has attracted significant
interest in decades. This paper presents a literature review on prognosis
approaches from published papers in the last decade. The prognostic approaches
are described comprehensively to provide a better idea on how to select an
appropriate prognosis method for specific needs. An advanced predictive
analytics, namely Parsimonious Network Based on Fuzzy Inference System
(PANFIS), was proposed and tested into the low speed slew bearing data. PANFIS
differs itself from conventional prognostic approaches in which it supports for
online lifelong prognostics without the requirement of retraining or
reconfiguration phase. The method is applied to normal-to-failure bearing
vibration data collected for 139 days and to predict the time-domain features
of vibration slew bearing signals. The performance of the proposed method is
compared to some established methods such as ANFIS, eTS, and Simp_eTS. From the
results, it is suggested that PANFIS offers outstanding performance compared to
those of other methods.
| eess.SP cs.NE | in recent years the utilization of rotating parts eg bearings and gears has been continuously supporting the manufacturing line to produce consistent output quality due to their critical role the breakdown of these components might significantly impact the production rate a proper condition based monitoring cbm is among a few ways to maintain and monitor the rotating systems prognosis as one of the major tasks in cbm that predicts and estimates the remaining useful life of the machine has attracted significant interest in decades this paper presents a literature review on prognosis approaches from published papers in the last decade the prognostic approaches are described comprehensively to provide a better idea on how to select an appropriate prognosis method for specific needs an advanced predictive analytics namely parsimonious network based on fuzzy inference system panfis was proposed and tested into the low speed slew bearing data panfis differs itself from conventional prognostic approaches in which it supports for online lifelong prognostics without the requirement of retraining or reconfiguration phase the method is applied to normaltofailure bearing vibration data collected for 139 days and to predict the timedomain features of vibration slew bearing signals the performance of the proposed method is compared to some established methods such as anfis ets and simp_ets from the results it is suggested that panfis offers outstanding performance compared to those of other methods | [['in', 'recent', 'years', 'the', 'utilization', 'of', 'rotating', 'parts', 'eg', 'bearings', 'and', 'gears', 'has', 'been', 'continuously', 'supporting', 'the', 'manufacturing', 'line', 'to', 'produce', 'consistent', 'output', 'quality', 'due', 'to', 'their', 'critical', 'role', 'the', 'breakdown', 'of', 'these', 'components', 'might', 'significantly', 'impact', 'the', 'production', 'rate', 'a', 'proper', 'condition', 'based', 'monitoring', 'cbm', 'is', 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1,802.09333 | The Cut and Dominating Set Problem in A Steganographer Network | A steganographer network corresponds to a graphic structure that the involved
vertices (or called nodes) denote social entities such as the data encoders and
data decoders, and the associated edges represent any real communicable
channels or other social links that could be utilized for steganography. Unlike
traditional steganographic algorithms, a steganographer network models
steganographic communication by an abstract way such that the concerned
underlying characteristics of steganography are quantized as analyzable
parameters in the network. In this paper, we will analyze two problems in a
steganographer network. The first problem is a passive attack to a
steganographer network where a network monitor has collected a list of
suspicious vertices corresponding to the data encoders or decoders. The network
monitor expects to break (disconnect) the steganographic communication down
between the suspicious vertices while keeping the cost as low as possible. The
second one relates to determining a set of vertices corresponding to the data
encoders (senders) such that all vertices can share a message by neighbors. We
point that, the two problems are equivalent to the minimum cut problem and the
minimum-weight dominating set problem.
| cs.DS cs.MM | a steganographer network corresponds to a graphic structure that the involved vertices or called nodes denote social entities such as the data encoders and data decoders and the associated edges represent any real communicable channels or other social links that could be utilized for steganography unlike traditional steganographic algorithms a steganographer network models steganographic communication by an abstract way such that the concerned underlying characteristics of steganography are quantized as analyzable parameters in the network in this paper we will analyze two problems in a steganographer network the first problem is a passive attack to a steganographer network where a network monitor has collected a list of suspicious vertices corresponding to the data encoders or decoders the network monitor expects to break disconnect the steganographic communication down between the suspicious vertices while keeping the cost as low as possible the second one relates to determining a set of vertices corresponding to the data encoders senders such that all vertices can share a message by neighbors we point that the two problems are equivalent to the minimum cut problem and the minimumweight dominating set problem | [['a', 'steganographer', 'network', 'corresponds', 'to', 'a', 'graphic', 'structure', 'that', 'the', 'involved', 'vertices', 'or', 'called', 'nodes', 'denote', 'social', 'entities', 'such', 'as', 'the', 'data', 'encoders', 'and', 'data', 'decoders', 'and', 'the', 'associated', 'edges', 'represent', 'any', 'real', 'communicable', 'channels', 'or', 'other', 'social', 'links', 'that', 'could', 'be', 'utilized', 'for', 'steganography', 'unlike', 'traditional', 'steganographic', 'algorithms', 'a', 'steganographer', 'network', 'models', 'steganographic', 'communication', 'by', 'an', 'abstract', 'way', 'such', 'that', 'the', 'concerned', 'underlying', 'characteristics', 'of', 'steganography', 'are', 'quantized', 'as', 'analyzable', 'parameters', 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1,802.09334 | On the centroid of increasing trees | A centroid node in a tree is a node for which the sum of the distances to all
other nodes attains its minimum, or equivalently a node with the property that
none of its branches contains more than half of the other nodes. We generalise
some known results regarding the behaviour of centroid nodes in random
recursive trees (due to Moon) to the class of very simple increasing trees,
which also includes the families of plane-oriented and $d$-ary increasing
trees. In particular, we derive limits of distributions and moments for the
depth and label of the centroid node nearest to the root, as well as for the
size of the subtree rooted at this node.
| math.CO | a centroid node in a tree is a node for which the sum of the distances to all other nodes attains its minimum or equivalently a node with the property that none of its branches contains more than half of the other nodes we generalise some known results regarding the behaviour of centroid nodes in random recursive trees due to moon to the class of very simple increasing trees which also includes the families of planeoriented and dary increasing trees in particular we derive limits of distributions and moments for the depth and label of the centroid node nearest to the root as well as for the size of the subtree rooted at this node | [['a', 'centroid', 'node', 'in', 'a', 'tree', 'is', 'a', 'node', 'for', 'which', 'the', 'sum', 'of', 'the', 'distances', 'to', 'all', 'other', 'nodes', 'attains', 'its', 'minimum', 'or', 'equivalently', 'a', 'node', 'with', 'the', 'property', 'that', 'none', 'of', 'its', 'branches', 'contains', 'more', 'than', 'half', 'of', 'the', 'other', 'nodes', 'we', 'generalise', 'some', 'known', 'results', 'regarding', 'the', 'behaviour', 'of', 'centroid', 'nodes', 'in', 'random', 'recursive', 'trees', 'due', 'to', 'moon', 'to', 'the', 'class', 'of', 'very', 'simple', 'increasing', 'trees', 'which', 'also', 'includes', 'the', 'families', 'of', 'planeoriented', 'and', 'dary', 'increasing', 'trees', 'in', 'particular', 'we', 'derive', 'limits', 'of', 'distributions', 'and', 'moments', 'for', 'the', 'depth', 'and', 'label', 'of', 'the', 'centroid', 'node', 'nearest', 'to', 'the', 'root', 'as', 'well', 'as', 'for', 'the', 'size', 'of', 'the', 'subtree', 'rooted', 'at', 'this', 'node']] | [-0.13492720933205893, 0.11033137961969022, -0.01642692036035916, 0.06020920189988354, -0.10279149066089936, -0.11669823233362125, 0.1433725118799054, 0.34793744243317, -0.299521133378553, -0.28144922409530565, 0.09631030348878677, -0.347004063848568, -0.1136892677831423, 0.1346190318181787, -0.050862970887480874, 0.006626737882059229, 0.07962737941871519, 0.1784487567032161, -0.038458085230187226, -0.23954585275167356, 0.31088439830902803, 0.08628093343147117, 0.213873247668633, 0.04408720587076538, 0.1357884495721563, 0.05073716291428908, -0.0011618046494929687, 0.06054865544175972, -0.09441090800993034, 0.09992532797319734, 0.22411889502292742, 0.1573683986035378, 0.2249134698599253, -0.3500072043146128, -0.17621805019190778, 0.16981005252885592, 0.14990595583196567, 0.12159031861785637, 0.028588941200692004, -0.22261810681944633, 0.1442965420084479, -0.15851619800390757, -0.1416915596746232, 0.04307003278011942, 0.07039623450508098, 0.08606028223572218, -0.22457009653520324, 0.027934087875410508, 0.09081356292286807, 0.03940646382777587, -0.0058226574860189275, -0.19180838454352772, -0.07014513133782084, 0.1466022916543095, 0.010272798677096549, 0.034747137944214045, 0.06256481129271181, -0.14155928993258504, -0.1519157924213568, 0.38098643778458885, 0.0008616272009575092, -0.1738866623936464, 0.19712473556156393, -0.13449068629061398, -0.17487007943994326, 0.08805012281012276, 0.16778476078711127, 0.1131946750835556, -0.12196520646305188, 0.036335540549201975, -0.03670562554312789, 0.1043422142367648, 0.10654557086527347, 0.048287273489910625, 0.16956081398479317, 0.13950409754989263, 0.17139706970597415, 0.19037106103850934, -0.1328937104538731, -0.09385102941533145, -0.2515024858567378, -0.13183978112900388, -0.22833540097749588, -0.03351206125124641, -0.18190054847294485, -0.24936399860813727, 0.43545598096173743, 0.12581309103002042, 0.2721820772463537, 0.16474968087049607, 0.24296421551186106, 0.09587894220148092, 0.10655470224826233, 0.12471486983375381, 0.15722499973996057, 0.14688916059777787, 0.009137485247186345, -0.15227116716863667, 0.12280006372805118, 0.09595044142688099] |
1,802.09335 | An Integrated Pipeline Architecture for Modeling Urban Land Use, Travel
Demand, and Traffic Assignment | Integrating land use, travel demand, and traffic models represents a gold
standard for regional planning, but is rarely achieved in a meaningful way,
especially at the scale of disaggregate data. In this report, we present a new
pipeline architecture for integrated modeling of urban land use, travel demand,
and traffic assignment. Our land use model, UrbanSim, is an open-source
microsimulation platform used by metropolitan planning organizations worldwide
for modeling the growth and development of cities over long (~30 year) time
horizons. UrbanSim is particularly powerful as a scenario analysis tool,
enabling planners to compare and contrast the impacts of different policy
decisions on long term land use forecasts in a statistically rigorous way. Our
travel demand model, ActivitySim, is an agent-based modeling platform that
produces synthetic origin--destination travel demand data. Finally, we use a
static user equilibrium traffic assignment model based on the Frank-Wolfe
algorithm to assign vehicles to specific network paths to make trips between
origins and destinations. This traffic assignment model runs in a
high-performance computing environment. The resulting congested travel time
data can then be fed back into UrbanSim and ActivitySim for the next model run.
This technical report introduces this research area, describes this project's
achievements so far in developing this integrated pipeline, and presents an
upcoming research agenda.
| cs.CY | integrating land use travel demand and traffic models represents a gold standard for regional planning but is rarely achieved in a meaningful way especially at the scale of disaggregate data in this report we present a new pipeline architecture for integrated modeling of urban land use travel demand and traffic assignment our land use model urbansim is an opensource microsimulation platform used by metropolitan planning organizations worldwide for modeling the growth and development of cities over long 30 year time horizons urbansim is particularly powerful as a scenario analysis tool enabling planners to compare and contrast the impacts of different policy decisions on long term land use forecasts in a statistically rigorous way our travel demand model activitysim is an agentbased modeling platform that produces synthetic origindestination travel demand data finally we use a static user equilibrium traffic assignment model based on the frankwolfe algorithm to assign vehicles to specific network paths to make trips between origins and destinations this traffic assignment model runs in a highperformance computing environment the resulting congested travel time data can then be fed back into urbansim and activitysim for the next model run this technical report introduces this research area describes this projects achievements so far in developing this integrated pipeline and presents an upcoming research agenda | [['integrating', 'land', 'use', 'travel', 'demand', 'and', 'traffic', 'models', 'represents', 'a', 'gold', 'standard', 'for', 'regional', 'planning', 'but', 'is', 'rarely', 'achieved', 'in', 'a', 'meaningful', 'way', 'especially', 'at', 'the', 'scale', 'of', 'disaggregate', 'data', 'in', 'this', 'report', 'we', 'present', 'a', 'new', 'pipeline', 'architecture', 'for', 'integrated', 'modeling', 'of', 'urban', 'land', 'use', 'travel', 'demand', 'and', 'traffic', 'assignment', 'our', 'land', 'use', 'model', 'urbansim', 'is', 'an', 'opensource', 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1,802.09336 | Diagonal complexes for surfaces of finite type and surfaces with
involution | Two related constructions are studied: (1) The diagonal complex $\mathcal{D}$
and its barycentric subdivision $\mathcal{BD}$ related to a \textit{punctured}
oriented surface $F$ equipped with a number of labeled marked points. (2) The
symmetric diagonal complex $\mathcal{D}^{inv}$ and its barycentric subdivision
$\mathcal{BD}^{inv}$ related to a symmetric (=with an involution) oriented
surface $F$ equipped with a number of (symmetrically placed) labeled marked
points. Eliminating a puncture gives rise to a bundle whose fibers are
homeomorphic to a surgery of the surface $F$. The bundle can be viewed as the
"universal curve with holes". The symmetric complex is shown to be homotopy
equivalent to the complex of a punctured surface obtained by a surgery of the
initial symmetric surface.
| math.GT | two related constructions are studied 1 the diagonal complex mathcald and its barycentric subdivision mathcalbd related to a textitpunctured oriented surface f equipped with a number of labeled marked points 2 the symmetric diagonal complex mathcaldinv and its barycentric subdivision mathcalbdinv related to a symmetric with an involution oriented surface f equipped with a number of symmetrically placed labeled marked points eliminating a puncture gives rise to a bundle whose fibers are homeomorphic to a surgery of the surface f the bundle can be viewed as the universal curve with holes the symmetric complex is shown to be homotopy equivalent to the complex of a punctured surface obtained by a surgery of the initial symmetric surface | [['two', 'related', 'constructions', 'are', 'studied', '1', 'the', 'diagonal', 'complex', 'mathcald', 'and', 'its', 'barycentric', 'subdivision', 'mathcalbd', 'related', 'to', 'a', 'textitpunctured', 'oriented', 'surface', 'f', 'equipped', 'with', 'a', 'number', 'of', 'labeled', 'marked', 'points', '2', 'the', 'symmetric', 'diagonal', 'complex', 'mathcaldinv', 'and', 'its', 'barycentric', 'subdivision', 'mathcalbdinv', 'related', 'to', 'a', 'symmetric', 'with', 'an', 'involution', 'oriented', 'surface', 'f', 'equipped', 'with', 'a', 'number', 'of', 'symmetrically', 'placed', 'labeled', 'marked', 'points', 'eliminating', 'a', 'puncture', 'gives', 'rise', 'to', 'a', 'bundle', 'whose', 'fibers', 'are', 'homeomorphic', 'to', 'a', 'surgery', 'of', 'the', 'surface', 'f', 'the', 'bundle', 'can', 'be', 'viewed', 'as', 'the', 'universal', 'curve', 'with', 'holes', 'the', 'symmetric', 'complex', 'is', 'shown', 'to', 'be', 'homotopy', 'equivalent', 'to', 'the', 'complex', 'of', 'a', 'punctured', 'surface', 'obtained', 'by', 'a', 'surgery', 'of', 'the', 'initial', 'symmetric', 'surface']] | [-0.21321418548344873, 0.11070849689301124, -0.06511107283289981, 0.018411879276288096, -0.10053194407373667, -0.20367168637190378, -0.005097240659787393, 0.38055013136657995, -0.30257955620444454, -0.2197973707966935, 0.10234286716883689, -0.2610679060814127, -0.1574768804145598, 0.18490427975600535, -0.17493282424170623, -0.011709507588766911, 0.033146897332940614, 0.11949630846491957, -0.11904937869547742, -0.2446223565653395, 0.375423540385951, -0.04052189118239155, 0.18447874614545087, 0.005316787860891988, 0.0961137599748584, -0.018418570834395385, -0.02301227788449125, 0.07786986030343573, -0.11334823326628028, 0.16592721322106313, 0.24333678825502902, 0.03611299385671067, 0.1332526150266681, -0.3894399539855993, -0.15584167071609897, 0.17938247820016293, 0.0720583545703408, -0.02802283961358851, -0.021790889190691234, -0.28057931224708405, 0.10350277792431611, -0.1146431531410961, -0.21285426072298294, -0.005084449293471015, 0.03791018746035025, 0.03661083297358941, -0.23669793494705077, -0.08250653662974328, 0.08936660412072608, 0.08867726587912941, -0.01285280772089233, -0.0893217466639734, -0.16094395433412453, 0.1025419622470122, -0.017439556961252756, 0.17378512070209315, 0.1115019081605483, -0.05102952957087386, -0.0871470494904613, 0.39671078751242794, -0.03611443299322133, -0.27760825708376624, 0.17198853451857524, -0.138339386688364, -0.06673898106127714, 0.23399195997291697, 0.11282756702718943, 0.16301884449424997, -0.02699272805182016, 0.10943026005278086, -0.06371056086144748, 0.10164780276868723, 0.1215267362303834, -0.0729713219061362, 0.21247339636227527, 0.10187191455583788, 0.09137433508938525, 0.15998539636612136, -0.05165505990081063, -0.07108513594695688, -0.31113772343151863, -0.1801805907398858, -0.15623243750625215, 0.14711085523157258, -0.1223714113710922, -0.2512806575975599, 0.38880294206164845, -0.052640665936555746, 0.27717733686888774, 0.06474454578968276, 0.22821752663328446, 0.06859411921380994, 0.10260192306085894, 0.03614400330090285, 0.08801152545596118, 0.20431816254214968, -0.027482136243344408, -0.14360280908990355, -0.009506508789902997, 0.14561321750382142] |
1,802.09337 | The Dynamics of Knowledge Acquisition via Self-Learning in Complex
Networks | Studies regarding knowledge organization and acquisition are of great
importance to understand areas related to science and technology. A common way
to model the relationship between different concepts is through complex
networks. In such representations, network's nodes store knowledge and edges
represent their relationships. Several studies that considered this type of
structure and knowledge acquisition dynamics employed one or more agents to
discover node concepts by walking on the network. In this study, we investigate
a different type of dynamics considering a single node as the "network brain".
Such brain represents a range of real systems such as the information about the
environment that is acquired by a person and is stored in the brain. To store
the discovered information in a specific node, the agents walk on the network
and return to the brain. We propose three different dynamics and test them on
several network models and on a real system, which is formed by journal
articles and their respective citations. Surprisingly, the results revealed
that, according to the adopted walking models, the efficiency of self-knowledge
acquisition has only a weak dependency on the topology, search strategy and
localization of the network brain.
| cs.SI physics.soc-ph | studies regarding knowledge organization and acquisition are of great importance to understand areas related to science and technology a common way to model the relationship between different concepts is through complex networks in such representations networks nodes store knowledge and edges represent their relationships several studies that considered this type of structure and knowledge acquisition dynamics employed one or more agents to discover node concepts by walking on the network in this study we investigate a different type of dynamics considering a single node as the network brain such brain represents a range of real systems such as the information about the environment that is acquired by a person and is stored in the brain to store the discovered information in a specific node the agents walk on the network and return to the brain we propose three different dynamics and test them on several network models and on a real system which is formed by journal articles and their respective citations surprisingly the results revealed that according to the adopted walking models the efficiency of selfknowledge acquisition has only a weak dependency on the topology search strategy and localization of the network brain | [['studies', 'regarding', 'knowledge', 'organization', 'and', 'acquisition', 'are', 'of', 'great', 'importance', 'to', 'understand', 'areas', 'related', 'to', 'science', 'and', 'technology', 'a', 'common', 'way', 'to', 'model', 'the', 'relationship', 'between', 'different', 'concepts', 'is', 'through', 'complex', 'networks', 'in', 'such', 'representations', 'networks', 'nodes', 'store', 'knowledge', 'and', 'edges', 'represent', 'their', 'relationships', 'several', 'studies', 'that', 'considered', 'this', 'type', 'of', 'structure', 'and', 'knowledge', 'acquisition', 'dynamics', 'employed', 'one', 'or', 'more', 'agents', 'to', 'discover', 'node', 'concepts', 'by', 'walking', 'on', 'the', 'network', 'in', 'this', 'study', 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1,802.09338 | An Energy Balance Based Method for Parameter Identification of a
Free-Flying Robot Grasping An Unknown Object | The estimation of inertial parameters of a robotic system is crucial for
better trajectory tracking performance, specially when model-based controllers
are used for carrying out precise tasks. In this paper, we consider the
scenario of grasping an object of unknown properties by a free-flyer space
robot with limited actuation. The problem is to find the inertial parameters of
the complete system after grasping has been performed. Excitation is provided
in inertial space, and the excitation trajectories are found by optimization.
Truncated Fourier series are used to represent the reference as well as tracked
trajectory. An approach based on the energy balance between the actuation work
and the rate of change of kinetic energy is introduced to calculate the number
of harmonics in the Fourier series used to represent the executed trajectory,
while trying to find a balance between accounting for saturation effects and
keeping out noise. The effect of input saturation on parameter estimation is
also studied. Simulation results using the Space CoBot free-flyer robot are
presented to show the feasibility of the approach.
| cs.RO | the estimation of inertial parameters of a robotic system is crucial for better trajectory tracking performance specially when modelbased controllers are used for carrying out precise tasks in this paper we consider the scenario of grasping an object of unknown properties by a freeflyer space robot with limited actuation the problem is to find the inertial parameters of the complete system after grasping has been performed excitation is provided in inertial space and the excitation trajectories are found by optimization truncated fourier series are used to represent the reference as well as tracked trajectory an approach based on the energy balance between the actuation work and the rate of change of kinetic energy is introduced to calculate the number of harmonics in the fourier series used to represent the executed trajectory while trying to find a balance between accounting for saturation effects and keeping out noise the effect of input saturation on parameter estimation is also studied simulation results using the space cobot freeflyer robot are presented to show the feasibility of the approach | [['the', 'estimation', 'of', 'inertial', 'parameters', 'of', 'a', 'robotic', 'system', 'is', 'crucial', 'for', 'better', 'trajectory', 'tracking', 'performance', 'specially', 'when', 'modelbased', 'controllers', 'are', 'used', 'for', 'carrying', 'out', 'precise', 'tasks', 'in', 'this', 'paper', 'we', 'consider', 'the', 'scenario', 'of', 'grasping', 'an', 'object', 'of', 'unknown', 'properties', 'by', 'a', 'freeflyer', 'space', 'robot', 'with', 'limited', 'actuation', 'the', 'problem', 'is', 'to', 'find', 'the', 'inertial', 'parameters', 'of', 'the', 'complete', 'system', 'after', 'grasping', 'has', 'been', 'performed', 'excitation', 'is', 'provided', 'in', 'inertial', 'space', 'and', 'the', 'excitation', 'trajectories', 'are', 'found', 'by', 'optimization', 'truncated', 'fourier', 'series', 'are', 'used', 'to', 'represent', 'the', 'reference', 'as', 'well', 'as', 'tracked', 'trajectory', 'an', 'approach', 'based', 'on', 'the', 'energy', 'balance', 'between', 'the', 'actuation', 'work', 'and', 'the', 'rate', 'of', 'change', 'of', 'kinetic', 'energy', 'is', 'introduced', 'to', 'calculate', 'the', 'number', 'of', 'harmonics', 'in', 'the', 'fourier', 'series', 'used', 'to', 'represent', 'the', 'executed', 'trajectory', 'while', 'trying', 'to', 'find', 'a', 'balance', 'between', 'accounting', 'for', 'saturation', 'effects', 'and', 'keeping', 'out', 'noise', 'the', 'effect', 'of', 'input', 'saturation', 'on', 'parameter', 'estimation', 'is', 'also', 'studied', 'simulation', 'results', 'using', 'the', 'space', 'cobot', 'freeflyer', 'robot', 'are', 'presented', 'to', 'show', 'the', 'feasibility', 'of', 'the', 'approach']] | [-0.11597840859403097, 0.0734532958204211, -0.09817964109852044, 0.019064174902078502, -0.06563485658532658, -0.10359908039627466, 0.0021433687104226284, 0.3966477442056287, -0.2480265668073539, -0.3623294623698606, 0.08740852028199168, -0.212353058359694, -0.12309984005121298, 0.23638449341524392, -0.09255315242118614, 0.13401232657109408, 0.07162975514751621, 0.06085159869723802, -0.036730769607455055, -0.2067825990136128, 0.28248139708519504, 0.08861936320724009, 0.2585561683748004, -0.018088853067913375, 0.1585583570792318, 0.02531371409138448, -0.032406749704657775, 0.011896290214831106, -0.1045456862897439, 0.0912579380640446, 0.24624886398652412, 0.10501858088334069, 0.2885662407917512, -0.4074656773510194, -0.21394101029456875, 0.07790351854258239, 0.12909942087284182, 0.07071182041748449, -0.02358881093502088, -0.2941958139417693, 0.0665220822624559, -0.14882469200529158, -0.08875296476600301, -0.1087646152780846, 0.021897839615121484, 0.039386117104292025, -0.3046548279732612, 0.05342030608711824, 0.016506806387549786, 0.0659291306821911, -0.08665212751149612, -0.07518209365256087, -0.01585764154726856, 0.19997361204861042, 0.05839933568224592, 0.01294960604363316, 0.1790729222445597, -0.12222953648698992, -0.09801778759872325, 0.40690824911431517, -0.0036589048923328952, -0.24978542787856747, 0.15717563051649175, -0.11081653783574354, -0.08692163430684961, 0.13118509832109043, 0.20090878588319377, 0.13453053364389425, -0.14956956200999125, 0.04004950734122039, 0.012335657854131314, 0.16908264751708524, 0.03920609823449753, -0.0017549507103340571, 0.17812632100364237, 0.2231195356607502, 0.08498806534551603, 0.15547267788463423, -0.10899811631832056, -0.09817706345956838, -0.29108354758991056, -0.11789910735645863, -0.1949169869361402, -0.04093921481263499, -0.03336752719101347, -0.10688408732219318, 0.3818476211609925, 0.1774847928683685, 0.20975338495174034, 0.03738400122410683, 0.341663554057663, 0.11830262192606189, 0.03212264217256953, 0.059297855227351794, 0.27904778724633766, 0.07985070468533005, 0.11659508244659708, -0.26735514706964497, 0.06708690706710872, 0.058881039182969566] |
1,802.09339 | The QCD axion beyond the classical level: A lattice study | The axion is a hypothetical elementary particle postulated by the
Peccei-Quinn theory to resolve the strong CP problem in QCD. If axions exist
and have low mass, they are a candidate for dark matter as well. So far our
knowledge of the properties of the QCD axion rests on semi-classical arguments
and effective theory. In this work we perform, for the first time, a fully
dynamical investigation of the Peccei-Quinn theory, focussing on the axion
mass, by simulating the theory on the lattice. The results of the simulation
are found to be in conflict with present axion phenomenology.
| hep-lat hep-ph hep-th nucl-th | the axion is a hypothetical elementary particle postulated by the pecceiquinn theory to resolve the strong cp problem in qcd if axions exist and have low mass they are a candidate for dark matter as well so far our knowledge of the properties of the qcd axion rests on semiclassical arguments and effective theory in this work we perform for the first time a fully dynamical investigation of the pecceiquinn theory focussing on the axion mass by simulating the theory on the lattice the results of the simulation are found to be in conflict with present axion phenomenology | [['the', 'axion', 'is', 'a', 'hypothetical', 'elementary', 'particle', 'postulated', 'by', 'the', 'pecceiquinn', 'theory', 'to', 'resolve', 'the', 'strong', 'cp', 'problem', 'in', 'qcd', 'if', 'axions', 'exist', 'and', 'have', 'low', 'mass', 'they', 'are', 'a', 'candidate', 'for', 'dark', 'matter', 'as', 'well', 'so', 'far', 'our', 'knowledge', 'of', 'the', 'properties', 'of', 'the', 'qcd', 'axion', 'rests', 'on', 'semiclassical', 'arguments', 'and', 'effective', 'theory', 'in', 'this', 'work', 'we', 'perform', 'for', 'the', 'first', 'time', 'a', 'fully', 'dynamical', 'investigation', 'of', 'the', 'pecceiquinn', 'theory', 'focussing', 'on', 'the', 'axion', 'mass', 'by', 'simulating', 'the', 'theory', 'on', 'the', 'lattice', 'the', 'results', 'of', 'the', 'simulation', 'are', 'found', 'to', 'be', 'in', 'conflict', 'with', 'present', 'axion', 'phenomenology']] | [-0.11752887962538065, 0.2089320144245439, -0.12822159158769159, 0.1373527140774745, -0.10578079993256881, -0.06991157169591597, 0.051696871010567615, 0.3088240415922233, -0.20932718968418026, -0.365854616086854, 0.10450280386579167, -0.21747645285759806, -0.10477642807218589, 0.14654394240731525, 0.024851577278055554, 0.05668747719918967, 0.004808589174621263, 0.058675565139143446, -0.041270389721719355, -0.21782720340558384, 0.3082099715200234, 0.0440062617738161, 0.1823748270885981, 0.09713008503752704, 0.04624100420528985, -0.03994296577626041, -0.035000192723712145, -0.02558610865808263, -0.15048900980036706, 0.07804379526558998, 0.17180557866409726, 0.0954713224414356, 0.19470852513902118, -0.4428416659903465, -0.2433770903367169, 0.10715604803467892, 0.11977965456471608, 0.1476765518665922, -0.10726389466495044, -0.3031280017743001, 0.10472929180238624, -0.15361302567417828, -0.1255122125338839, -0.07897377041719701, -0.03070772042478986, -0.032058245473902444, -0.24343264993394212, 0.07204245024079181, -0.009605078259779957, -0.01260557490857128, -0.04193296606298441, -0.10385743747180214, 0.030722364650240967, 0.021947240604239762, 0.14355649039557927, 0.02791043915381959, 0.1375058463166411, -0.1899268841347182, -0.13689874960299658, 0.47154341121109167, -0.07805905927195955, -0.15797510380115437, 0.1516118456718835, -0.12048322088631554, -0.1877056208334635, 0.1016011163129053, 0.11670654497052334, 0.13597489595983406, -0.12121922546660299, 0.1864872073474915, -0.1042547094426593, 0.1887703878301367, 0.017286989666825653, 0.052770984425608604, 0.3401278132591777, 0.2226311723055432, 0.0184716390545613, 0.04036138556085109, -0.013833384870608546, -0.13842697996094974, -0.3521557028918546, -0.1080671626912924, -0.1759629068487533, 0.05335370728767439, -0.05263747383183467, -0.15407721083896347, 0.33351537271174697, 0.15745595557976286, 0.184541272607689, 0.026287218047381967, 0.30494386193399525, 0.1149933793087851, 0.045202603335587344, 0.00667468264071765, 0.3532506882602691, 0.14791200466320983, 0.11845968879892357, -0.268223576959845, -0.05210523802207365, 0.09901396370236287] |
1,802.0934 | Studies in Tours of Knight on Rectangular Boards | The author has constructed and enumerated tours of knight having various
magic properties on 4 x n and 6 x n boards. 16 magic tours of knight have been
discovered on 4 x 18 board, 88 on 4 x 20 board, 464 on 4 x 22 board, 2076 on 4
x 24 board, 9904 on 4 x 26 board and 47456 on 4 x 28 board. Magic tours exist
on all boards of size 4 x 2k for k > 8. Quasi-magic tour exists on 6 x 11
board. 8 magic tours of knight have been discovered on 6 x 12 board and magic
tours exist on all boards of size 6 x 4k for k > 2.
| math.GM | the author has constructed and enumerated tours of knight having various magic properties on 4 x n and 6 x n boards 16 magic tours of knight have been discovered on 4 x 18 board 88 on 4 x 20 board 464 on 4 x 22 board 2076 on 4 x 24 board 9904 on 4 x 26 board and 47456 on 4 x 28 board magic tours exist on all boards of size 4 x 2k for k 8 quasimagic tour exists on 6 x 11 board 8 magic tours of knight have been discovered on 6 x 12 board and magic tours exist on all boards of size 6 x 4k for k 2 | [['the', 'author', 'has', 'constructed', 'and', 'enumerated', 'tours', 'of', 'knight', 'having', 'various', 'magic', 'properties', 'on', '4', 'x', 'n', 'and', '6', 'x', 'n', 'boards', '16', 'magic', 'tours', 'of', 'knight', 'have', 'been', 'discovered', 'on', '4', 'x', '18', 'board', '88', 'on', '4', 'x', '20', 'board', '464', 'on', '4', 'x', '22', 'board', '2076', 'on', '4', 'x', '24', 'board', '9904', 'on', '4', 'x', '26', 'board', 'and', '47456', 'on', '4', 'x', '28', 'board', 'magic', 'tours', 'exist', 'on', 'all', 'boards', 'of', 'size', '4', 'x', '2k', 'for', 'k', '8', 'quasimagic', 'tour', 'exists', 'on', '6', 'x', '11', 'board', '8', 'magic', 'tours', 'of', 'knight', 'have', 'been', 'discovered', 'on', '6', 'x', '12', 'board', 'and', 'magic', 'tours', 'exist', 'on', 'all', 'boards', 'of', 'size', '6', 'x', '4k', 'for', 'k', '2']] | [-0.21203730117300884, 0.22374680371987715, 0.051801376355191074, 0.0270830748455697, 0.030816937167720312, -0.22899415533532175, 0.14776691080381474, 0.42504930130222385, -0.07880006875156571, -0.5473362858358183, 0.1689717477971786, -0.42574826444973024, -0.06410756782759308, 0.24383632859966733, -0.022075899097999035, -0.02515356358663555, 0.007565888755938463, 0.0994905920907561, -0.07212546147536814, -0.40295341091328546, 0.17454582571640218, -0.04785889191062827, 0.20781595456789723, -0.030635167019474403, 0.18273133331942454, 0.05305168974959279, 0.021738212541350277, 0.031160598261314527, -0.16322283609361762, 0.04251511036285624, 0.1676077464464725, 0.12483105234691481, 0.14498769112846308, -0.37354201239353996, -0.023024605995599638, 0.06552435556148882, 0.08000245723227986, -0.15443294904533805, 0.06039468184003214, -0.21680190556748002, 0.07231704014957997, -0.09252438573330118, -0.08707297558022108, 0.0790488340140304, 0.19274360699611798, 0.028881822631024477, -0.08432233867872703, -0.1613289624403574, 0.05081157498633522, 0.18055354255218908, -0.02179135930348645, -0.3410933195662342, 0.003234326434035769, 0.11285086586793656, -0.15693872107709594, 0.1664362886324198, 0.06065273342507058, -0.0204611863060691, -0.18382228750290283, 0.23764169129559345, 0.012770744702337604, -0.011931454754646933, 0.08494037886460622, -0.22763692040666283, -0.20654578511848262, 0.3063290060677549, 0.1210626617784759, 0.12362220150157156, -0.04284202704500211, 0.20640778776233723, -0.16251696105801353, 0.32164709800200764, 0.16753855294531636, -0.03175325348172663, 0.05208424266362399, 0.1679083142723692, 0.0963951933377406, 0.04276601744717673, -0.22460716363377542, 0.03555191361712723, -0.2611990854503554, -0.14440395176541387, -0.12592465958860294, 0.22927027318234505, -0.08125657262229524, -0.04894289638226231, 0.2853713072519831, 0.02122955857122546, 0.14991633295849488, -0.003616635132123504, 0.0813484811091289, -0.06711240335349239, 0.058093598288108124, 0.09407202855340745, 0.129360967744632, 0.10333959159457631, 0.09054088412391904, -0.08646635136009488, -0.05663397904534481, 0.0890627973141116] |
1,802.09341 | Ruled hypersurfaces with constant mean curvature in complex space forms | We show that ruled real hypersurfaces with constant mean curvature in the
complex projective and hyperbolic spaces must be minimal. This provides their
classification, by virtue of a result of Lohnherr and Reckziegel.
| math.DG | we show that ruled real hypersurfaces with constant mean curvature in the complex projective and hyperbolic spaces must be minimal this provides their classification by virtue of a result of lohnherr and reckziegel | [['we', 'show', 'that', 'ruled', 'real', 'hypersurfaces', 'with', 'constant', 'mean', 'curvature', 'in', 'the', 'complex', 'projective', 'and', 'hyperbolic', 'spaces', 'must', 'be', 'minimal', 'this', 'provides', 'their', 'classification', 'by', 'virtue', 'of', 'a', 'result', 'of', 'lohnherr', 'and', 'reckziegel']] | [-0.1779465167032134, 0.11572551153480046, -0.06117695774282179, 0.05860342059449683, -0.08484384219252294, -0.11542575594578539, -0.015245613732164907, 0.37897182984517946, -0.2572980724996136, -0.2661460889202933, 0.13376941294184014, -0.21234561938552127, -0.20145849288711626, 0.23741343437183288, -0.16945315720213036, 0.023812928447319616, 0.05824966776004482, 0.053097039701477174, -0.09131487337271532, -0.3384996965647705, 0.4451877323369826, -0.023471590612203844, 0.1736085161326393, 0.13226098723844776, 0.1464468838286496, 0.009452821972269205, -0.03686911654808829, 0.09423255836290698, -0.14318738731432654, 0.18302405727726798, 0.2400227413032084, 0.10600799195949108, 0.20612427155907836, -0.3530187265526864, -0.25639888866534155, 0.25136832476803855, 0.12755462470194023, 0.03301639398259501, -0.03074733648569353, -0.30425490517049064, 0.10228818522826318, -0.06554497982705793, -0.19992243322814185, -0.13931587653895539, -0.041791772950560815, 0.002458418118617227, -0.18276447316090907, 0.07807155440170918, 0.0976236188303559, 0.1394762990155047, -0.07937520306797759, -0.028245134985134486, -0.08260408984196763, 0.08328339858581463, 0.03574786389306668, 0.038588146573954055, 0.06208483990462076, -0.04688953102806643, -0.09352290978835474, 0.3978404014581634, -0.11512050236905774, -0.31349009533803307, 0.12080359843469435, -0.1773133462204808, -0.07356651801796209, 0.11501625360500428, 0.1471241871796308, 0.13842661427934805, -0.03694148728203389, 0.1541116767442755, -0.04561255142963942, 0.08667246045003976, 0.06968908811048154, -0.05014640331688908, 0.17753234561983375, 0.11561093393773321, 0.09036997032742347, 0.09054354399127225, -0.005681086451776566, -0.06436408580573756, -0.35002936939558676, -0.264625585698072, -0.16349734984818967, 0.16843398179738753, -0.16261493612828123, -0.16957048933592536, 0.3815591677782997, -0.009493580658829982, 0.25425931342667146, 0.14843455873309605, 0.263361981318843, 0.04314959347586057, 0.05093109553619739, 0.09264835174525937, 0.2676473955263294, 0.12493499116821875, 0.008659691519794925, -0.11026499600660417, -0.007671862209756528, 0.06582928710286656] |
1,802.09342 | Probability distribution function of crossover frequency of operational
amplifiers | For the first time the cumulative distribution function of the crossover
frequency of a contemporary operational amplifier ADA4898-2 is experimentally
studied. Using a USB Lock-In amplifier, which allows automatic frequency sweep
of the current response of a non-inverting amplifier with significant static
amplification, we measure the crossover frequency of 200 samples of ADA4898-2
operational amplifiers. This new method gives a significant advantage in
accuracy and speed of study of every operational amplifier. The theory we use
is based on the universal relation between time dependent output and input
voltages. This common relation for all operational amplifiers is applicable for
frequencies much smaller than the crossover frequency and the frequencies of
non-dominant poles. In other words, this approximation is adequate, when an
operational amplifier is included in a circuit with significant amplification.
| eess.SP | for the first time the cumulative distribution function of the crossover frequency of a contemporary operational amplifier ada48982 is experimentally studied using a usb lockin amplifier which allows automatic frequency sweep of the current response of a noninverting amplifier with significant static amplification we measure the crossover frequency of 200 samples of ada48982 operational amplifiers this new method gives a significant advantage in accuracy and speed of study of every operational amplifier the theory we use is based on the universal relation between time dependent output and input voltages this common relation for all operational amplifiers is applicable for frequencies much smaller than the crossover frequency and the frequencies of nondominant poles in other words this approximation is adequate when an operational amplifier is included in a circuit with significant amplification | [['for', 'the', 'first', 'time', 'the', 'cumulative', 'distribution', 'function', 'of', 'the', 'crossover', 'frequency', 'of', 'a', 'contemporary', 'operational', 'amplifier', 'ada48982', 'is', 'experimentally', 'studied', 'using', 'a', 'usb', 'lockin', 'amplifier', 'which', 'allows', 'automatic', 'frequency', 'sweep', 'of', 'the', 'current', 'response', 'of', 'a', 'noninverting', 'amplifier', 'with', 'significant', 'static', 'amplification', 'we', 'measure', 'the', 'crossover', 'frequency', 'of', '200', 'samples', 'of', 'ada48982', 'operational', 'amplifiers', 'this', 'new', 'method', 'gives', 'a', 'significant', 'advantage', 'in', 'accuracy', 'and', 'speed', 'of', 'study', 'of', 'every', 'operational', 'amplifier', 'the', 'theory', 'we', 'use', 'is', 'based', 'on', 'the', 'universal', 'relation', 'between', 'time', 'dependent', 'output', 'and', 'input', 'voltages', 'this', 'common', 'relation', 'for', 'all', 'operational', 'amplifiers', 'is', 'applicable', 'for', 'frequencies', 'much', 'smaller', 'than', 'the', 'crossover', 'frequency', 'and', 'the', 'frequencies', 'of', 'nondominant', 'poles', 'in', 'other', 'words', 'this', 'approximation', 'is', 'adequate', 'when', 'an', 'operational', 'amplifier', 'is', 'included', 'in', 'a', 'circuit', 'with', 'significant', 'amplification']] | [-0.16181072514177164, 0.12877478134626869, -0.09004048386300764, 0.03673294061645581, -0.06997920012897776, -0.16653830028771785, 0.12056211725798016, 0.3872449802561798, -0.2175811388679133, -0.25894299448638414, 0.06548501956444332, -0.2555705998822707, -0.10982678632450979, 0.2688460699997963, -0.054792400051391764, 0.061358327629001994, -0.007735391021244057, 0.04260595287160791, -0.049787980591423295, -0.1340571491666252, 0.2347633435163391, 0.08416113568441445, 0.3654480315744877, 0.00513236706664089, 0.16700779510135869, -0.025051835394741696, 0.011401962602639017, -0.03418260920110322, -0.08047769252452573, 0.0591190149438859, 0.30220453892052457, 0.09880349524354719, 0.30121806731362266, -0.3641666098671542, -0.18124292526689167, 0.07643038918840066, 0.0842453619235956, 0.10903145436407245, -0.00829134582637859, -0.2077956502219193, 0.02292304555352294, -0.21553172809533946, -0.05643856061714922, -0.030367823211006992, 0.04242868350733441, 0.039077724754909865, -0.26540262394812214, 0.06332396182679494, 0.07997287901914643, 0.1028469028875573, -0.004666228786213963, -0.08921139300196566, 0.035133943366036105, 0.11049973478657193, -0.045862286488475804, 0.017467880630439133, 0.13654435481405142, -0.09804974533510856, -0.09557372634476832, 0.31619264481176856, -0.1092012071799183, -0.13588037724937277, 0.14906482557936762, -0.18241607617117636, -0.040263662733251354, 0.13912652328233627, 0.16049171140851126, 0.040428024066171346, -0.14164481310847923, 0.03150059417857014, 0.04038531466152604, 0.2404840266090313, 0.1278755467541459, 0.0815892012804064, 0.16442136912258298, 0.23885111794949204, 0.06167856338682748, 0.18414604818476862, -0.0889977369569011, -0.04357323149585286, -0.3170156891791875, -0.10283658866422209, -0.1515602331834255, 0.015873810692285082, -0.08776431270301402, -0.1543558749604885, 0.4463426929024112, 0.21278016296222466, 0.1505706942469621, 0.06524001846164607, 0.39591837742628944, 0.21104714638404265, 0.10922492178999428, 0.019580419285410395, 0.2564062404851536, 0.14090620272238347, 0.11386242999076729, -0.22962632057797305, 0.06519522076074517, -0.019870934037505898] |
1,802.09343 | Differential Operator Method of Finding A Particular Solution to An
Ordinary Nonhomogeneous Linear Differential Equation with Constant
Coefficients | We systematically introduce the idea of applying differential operator method
to find a particular solution of an ordinary nonhomogeneous linear differential
equation with constant coefficients when the nonhomogeneous term is a
polynomial function, exponential function, sine function, cosine function or
any possible product of these functions. In particular, different from the
differential operator method introduced in literature, we propose and highlight
utilizing the definition of the inverse of differential operator to determine a
particular solution. We suggest that this method should be introduced in
textbooks and widely used for determining a particular solution of an ordinary
nonhomogeneous linear differential equation with constant coefficients in
parallel to the method of undetermined coefficients.
| math.GM | we systematically introduce the idea of applying differential operator method to find a particular solution of an ordinary nonhomogeneous linear differential equation with constant coefficients when the nonhomogeneous term is a polynomial function exponential function sine function cosine function or any possible product of these functions in particular different from the differential operator method introduced in literature we propose and highlight utilizing the definition of the inverse of differential operator to determine a particular solution we suggest that this method should be introduced in textbooks and widely used for determining a particular solution of an ordinary nonhomogeneous linear differential equation with constant coefficients in parallel to the method of undetermined coefficients | [['we', 'systematically', 'introduce', 'the', 'idea', 'of', 'applying', 'differential', 'operator', 'method', 'to', 'find', 'a', 'particular', 'solution', 'of', 'an', 'ordinary', 'nonhomogeneous', 'linear', 'differential', 'equation', 'with', 'constant', 'coefficients', 'when', 'the', 'nonhomogeneous', 'term', 'is', 'a', 'polynomial', 'function', 'exponential', 'function', 'sine', 'function', 'cosine', 'function', 'or', 'any', 'possible', 'product', 'of', 'these', 'functions', 'in', 'particular', 'different', 'from', 'the', 'differential', 'operator', 'method', 'introduced', 'in', 'literature', 'we', 'propose', 'and', 'highlight', 'utilizing', 'the', 'definition', 'of', 'the', 'inverse', 'of', 'differential', 'operator', 'to', 'determine', 'a', 'particular', 'solution', 'we', 'suggest', 'that', 'this', 'method', 'should', 'be', 'introduced', 'in', 'textbooks', 'and', 'widely', 'used', 'for', 'determining', 'a', 'particular', 'solution', 'of', 'an', 'ordinary', 'nonhomogeneous', 'linear', 'differential', 'equation', 'with', 'constant', 'coefficients', 'in', 'parallel', 'to', 'the', 'method', 'of', 'undetermined', 'coefficients']] | [-0.095886890650601, 0.027607774725110428, -0.09131480008363724, 0.05406033865234873, -0.12603313143591624, -0.132010517356632, -0.029623446860224813, 0.3138440458087234, -0.3721637834400476, -0.25733229155056514, 0.08576205833437475, -0.2674772369398459, -0.22099865596481338, 0.18121258761557574, -0.03761866527634698, 0.1266922800306667, 0.01691960692659376, 0.029348044245092717, -0.12748717011407706, -0.23065328870497243, 0.3914786420997467, -0.003974890512590473, 0.22621643308315192, 0.018439726841107413, 0.19085188560724795, 0.011866201390722045, -0.09717175851550859, 0.012498946524820887, -0.16585810192440362, 0.10350633146207747, 0.24969542730465397, 0.05907900182547064, 0.27820007638535926, -0.403176954519507, -0.14989836691870345, 0.12873999585254906, 0.13118679197253408, 0.09383885559902803, -0.047364406615940366, -0.21683650705459956, 0.06968999620650786, -0.1792334062424866, -0.186403590994929, -0.06509220508673975, 0.024488782501771108, 0.06049810493415272, -0.32944605268772925, 0.10423994933565457, 0.054012077558483626, 0.02313009612178346, -0.09184390506161763, -0.11573949325326327, 0.05363991747920712, 0.029598274298886944, 0.034550147087036354, 0.020526866462115233, 0.04907537948524764, -0.09880157737774556, -0.09709171465858146, 0.33593625509020714, -0.16573460702364845, -0.32445238621251005, 0.09119236910598236, -0.14264814188989164, -0.10058206484258712, 0.05312877245717221, 0.17547035812156964, 0.19382061765252337, -0.18552172072674883, 0.11790297460545122, -0.04675981025882737, 0.15732379715789008, 0.062066965132347635, -0.029978660692519567, 0.08411725835354479, 0.07133357018559568, 0.10240339059886094, 0.15666505669533098, 0.013836997057739142, -0.12039057880289736, -0.3190851604213586, -0.1918643123243709, -0.13210707923045029, 0.04019882250157697, -0.11031441893486248, -0.2294317171447449, 0.375230412124782, 0.10252793651778956, 0.20358172706789798, 0.019526995064036268, 0.26487629493564235, 0.3007305958853649, 0.058146349905344015, 0.029405810718352778, 0.1770996400700496, 0.1560579024544741, 0.12264613041167592, -0.2126564922520203, 0.07694115491818872, 0.1502222158350386] |
1,802.09344 | Learning Analytics in Massive Open Online Courses | Educational technology has obtained great importance over the last fifteen
years. At present, the umbrella of educational technology incorporates
multitudes of engaging online environments and fields. Learning analytics and
Massive Open Online Courses (MOOCs) are two of the most relevant emerging
topics in this domain. Since they are open to everyone at no cost, MOOCs excel
in attracting numerous participants that can reach hundreds and hundreds of
thousands. Experts from different disciplines have shown significant interest
in MOOCs as the phenomenon has rapidly grown. In fact, MOOCs have been proven
to scale education in disparate areas. Their benefits are crystallized in the
improvement of educational outcomes, reduction of costs and accessibility
expansion. Due to their unusual massiveness, the large datasets of MOOC
platforms require advanced tools and methodologies for further examination. The
key importance of learning analytics is reflected here. MOOCs offer diverse
challenges and practices for learning analytics to tackle. In view of that,
this thesis combines both fields in order to investigate further steps in the
learning analytics capabilities in MOOCs. The primary research of this
dissertation focuses on the integration of learning analytics in MOOCs, and
thereafter looks into examining students' behavior on one side and bridging
MOOC issues on the other side. The research was done on the Austrian iMooX
xMOOC platform. We followed the prototyping and case studies research
methodology to carry out the research questions of this dissertation. The main
contributions incorporate designing a general learning analytics framework,
learning analytics prototype, records of students' behavior in nearly every
MOOC's variables (discussion forums, interactions in videos, self-assessment
quizzes, login frequency), a cluster of student engagement...
| cs.CY cs.LG | educational technology has obtained great importance over the last fifteen years at present the umbrella of educational technology incorporates multitudes of engaging online environments and fields learning analytics and massive open online courses moocs are two of the most relevant emerging topics in this domain since they are open to everyone at no cost moocs excel in attracting numerous participants that can reach hundreds and hundreds of thousands experts from different disciplines have shown significant interest in moocs as the phenomenon has rapidly grown in fact moocs have been proven to scale education in disparate areas their benefits are crystallized in the improvement of educational outcomes reduction of costs and accessibility expansion due to their unusual massiveness the large datasets of mooc platforms require advanced tools and methodologies for further examination the key importance of learning analytics is reflected here moocs offer diverse challenges and practices for learning analytics to tackle in view of that this thesis combines both fields in order to investigate further steps in the learning analytics capabilities in moocs the primary research of this dissertation focuses on the integration of learning analytics in moocs and thereafter looks into examining students behavior on one side and bridging mooc issues on the other side the research was done on the austrian imoox xmooc platform we followed the prototyping and case studies research methodology to carry out the research questions of this dissertation the main contributions incorporate designing a general learning analytics framework learning analytics prototype records of students behavior in nearly every moocs variables discussion forums interactions in videos selfassessment quizzes login frequency a cluster of student engagement | [['educational', 'technology', 'has', 'obtained', 'great', 'importance', 'over', 'the', 'last', 'fifteen', 'years', 'at', 'present', 'the', 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1,802.09345 | Information and Communications Technologies for Sustainable Development
Goals: State-of-the-Art, Needs and Perspectives | In September 2015, the United Nations General Assembly accepted the 2030
Development Agenda, which has included 92 paragraphs, and the Paragraph 91
defined 17 sustainable development goals (SDGs) and 169 associated targets. The
goal of this paper is to discover the correlations among SDGs and information
and communications technologies (ICTs). This paper discusses the roles and
opportunities that ICTs play in pursuing the SDGs. We identify a number of
research gaps to those three pillars, social, economic, and environmental
perspectives, of sustainable development. After extensive literature reviews on
the SDG-related research initiatives and activities, we find that the majority
of contributions to SDGs recognized by the IEEE and ACM research communities
have mainly focused on the technical aspects, while there are lack of the
holistic social good perspectives. Therefore, there are essential and urgent
needs to raise the awareness and call for attentions on how to innovate and
energize ICTs in order to best assist all nations to achieve the SDGs by 2030.
| cs.CY | in september 2015 the united nations general assembly accepted the 2030 development agenda which has included 92 paragraphs and the paragraph 91 defined 17 sustainable development goals sdgs and 169 associated targets the goal of this paper is to discover the correlations among sdgs and information and communications technologies icts this paper discusses the roles and opportunities that icts play in pursuing the sdgs we identify a number of research gaps to those three pillars social economic and environmental perspectives of sustainable development after extensive literature reviews on the sdgrelated research initiatives and activities we find that the majority of contributions to sdgs recognized by the ieee and acm research communities have mainly focused on the technical aspects while there are lack of the holistic social good perspectives therefore there are essential and urgent needs to raise the awareness and call for attentions on how to innovate and energize icts in order to best assist all nations to achieve the sdgs by 2030 | [['in', 'september', '2015', 'the', 'united', 'nations', 'general', 'assembly', 'accepted', 'the', '2030', 'development', 'agenda', 'which', 'has', 'included', '92', 'paragraphs', 'and', 'the', 'paragraph', '91', 'defined', '17', 'sustainable', 'development', 'goals', 'sdgs', 'and', '169', 'associated', 'targets', 'the', 'goal', 'of', 'this', 'paper', 'is', 'to', 'discover', 'the', 'correlations', 'among', 'sdgs', 'and', 'information', 'and', 'communications', 'technologies', 'icts', 'this', 'paper', 'discusses', 'the', 'roles', 'and', 'opportunities', 'that', 'icts', 'play', 'in', 'pursuing', 'the', 'sdgs', 'we', 'identify', 'a', 'number', 'of', 'research', 'gaps', 'to', 'those', 'three', 'pillars', 'social', 'economic', 'and', 'environmental', 'perspectives', 'of', 'sustainable', 'development', 'after', 'extensive', 'literature', 'reviews', 'on', 'the', 'sdgrelated', 'research', 'initiatives', 'and', 'activities', 'we', 'find', 'that', 'the', 'majority', 'of', 'contributions', 'to', 'sdgs', 'recognized', 'by', 'the', 'ieee', 'and', 'acm', 'research', 'communities', 'have', 'mainly', 'focused', 'on', 'the', 'technical', 'aspects', 'while', 'there', 'are', 'lack', 'of', 'the', 'holistic', 'social', 'good', 'perspectives', 'therefore', 'there', 'are', 'essential', 'and', 'urgent', 'needs', 'to', 'raise', 'the', 'awareness', 'and', 'call', 'for', 'attentions', 'on', 'how', 'to', 'innovate', 'and', 'energize', 'icts', 'in', 'order', 'to', 'best', 'assist', 'all', 'nations', 'to', 'achieve', 'the', 'sdgs', 'by', '2030']] | [-0.1039721875761946, 0.0974706173500759, -0.011348925824104636, 0.061577068983123026, -0.09926829731198211, -0.07775418684962651, 0.06526831625874534, 0.3724747568909309, -0.1903506573196213, -0.380567508439223, 0.11219892189421196, -0.32742434351440564, -0.194555788329676, 0.17584570130696944, -0.13043377371964815, 0.024822617889623397, 0.05966775476311644, -0.009885164896848347, 0.020658524356276534, -0.33471300739243076, 0.3061628415806932, 0.09197025141897208, 0.35865140713774313, 0.1259604826696033, 0.04391623482706002, -0.025925330290956033, -0.13847953047787334, -0.04596337966942861, -0.12961011778257492, 0.22502287728194562, 0.40381609077024977, 0.24647933939172897, 0.41951760554249273, -0.4353429440661897, -0.15586470559679177, 0.07064946691137682, 0.10847469399047924, 0.022790430527594354, -0.0481022589942038, -0.2943242158277972, 0.06426752712160785, -0.21425559658292728, -0.10503516598018231, -0.052052426473869956, 0.056737261108571184, 0.0047192195840726064, -0.17228942943440842, -0.010024895114187485, 0.042317662835782276, 0.11926821326940423, -0.04087896807619405, -0.14594007073542287, 0.005715490754314319, 0.22819690423551228, 0.079259706323357, 0.0647079433750341, 0.14109995380549886, -0.17085971278253437, -0.1753915125262682, 0.39566120827127893, 0.02691431516956791, -0.0745690097115405, 0.195328216242351, -0.10308501526338255, -0.18996747736934066, 0.04093059462482213, 0.22576410716175344, 0.004658798787945502, -0.19622548942362178, 0.009577002516088225, 0.0406908163352421, 0.1430899113341936, 0.06472351546916696, 0.050408925690449614, 0.23798201653968404, 0.18289536832818146, 0.09195850675431207, 0.03758672190496675, -0.01693004580325286, -0.1263932825115015, -0.21119190044241187, -0.14457199164022358, -0.06974440106596039, 0.0015011575092047016, 0.024563900854299853, -0.06616668463512151, 0.4205465865534167, 0.21623544654101823, 0.08967758607432637, -0.018522449992568357, 0.2622696327528468, -0.024937265158780378, 0.0919050431959791, 0.11221642696649342, 0.2535324224039487, 0.042437316525014646, 0.1849165100497941, -0.12580440394051465, 0.09662086069928827, -0.03338115455950668] |
1,802.09346 | Microwave Tube Fault-Current Model for Design of Crowbar Protection | Many applications that use high energy plasma are realized using Microwave
tubes (MWT) that operate at peak power in the range of hundreds of MW and
frequency in GHz. One failure mode of the MWT is due to the excess energy in
the tube during internal arcing events. Crowbar is used to protect the MWT by
diverting the energy during fault. To compute the energy released into the MWT,
the dc fault current model and the MWT model are essential. An equivalent fuse
wire model is utilized for the MWT for the crowbar applications. The paper
proposes a model for the dc fault current, the analysis for which is based on
Joules Integral energy concept. The model provides flexibility to choose a
range of practically observed reactance to resistance ratio (X/R) of
transformer and also allows the use of a range of dc current limiting
resistances that are utilized in the High Voltage (HV) power supply circuits in
Microwave applications. The non-linearity of the system due to the multipulse
diode rectifier is also considered by introducing a correction factor in the
model. This paper shows that the same correction factor can be applied for both
dc side parallel and series connected rectifier circuits. Both dc fault current
and MWT models are verified experimentally. Using the model a 10kV , 1kA
crowbar is built to limit the energy in MWT below 10J.
| eess.SP physics.ins-det | many applications that use high energy plasma are realized using microwave tubes mwt that operate at peak power in the range of hundreds of mw and frequency in ghz one failure mode of the mwt is due to the excess energy in the tube during internal arcing events crowbar is used to protect the mwt by diverting the energy during fault to compute the energy released into the mwt the dc fault current model and the mwt model are essential an equivalent fuse wire model is utilized for the mwt for the crowbar applications the paper proposes a model for the dc fault current the analysis for which is based on joules integral energy concept the model provides flexibility to choose a range of practically observed reactance to resistance ratio xr of transformer and also allows the use of a range of dc current limiting resistances that are utilized in the high voltage hv power supply circuits in microwave applications the nonlinearity of the system due to the multipulse diode rectifier is also considered by introducing a correction factor in the model this paper shows that the same correction factor can be applied for both dc side parallel and series connected rectifier circuits both dc fault current and mwt models are verified experimentally using the model a 10kv 1ka crowbar is built to limit the energy in mwt below 10j | [['many', 'applications', 'that', 'use', 'high', 'energy', 'plasma', 'are', 'realized', 'using', 'microwave', 'tubes', 'mwt', 'that', 'operate', 'at', 'peak', 'power', 'in', 'the', 'range', 'of', 'hundreds', 'of', 'mw', 'and', 'frequency', 'in', 'ghz', 'one', 'failure', 'mode', 'of', 'the', 'mwt', 'is', 'due', 'to', 'the', 'excess', 'energy', 'in', 'the', 'tube', 'during', 'internal', 'arcing', 'events', 'crowbar', 'is', 'used', 'to', 'protect', 'the', 'mwt', 'by', 'diverting', 'the', 'energy', 'during', 'fault', 'to', 'compute', 'the', 'energy', 'released', 'into', 'the', 'mwt', 'the', 'dc', 'fault', 'current', 'model', 'and', 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1,802.09347 | Surface excitations, shape deformation and the long-time behavior in a
stirred Bose-Einstein condensate | The surface excitations, shape deformation and the formation of persistent
current for a Gaussian obstacle potential rotating in an highly oblate
Bose-Einstein condensate(BEC)are investigated. Vortex dipole can be produced
and trapped in the center of the stirrer even for slow motion of the stirring
beam. When the barrier angular velocity is above some critical value, the
condensate shape can be deformed remarkably according to the rotation frequency
due to the existence of plenty of surface wave excitations. After a long enough
time, a few vortices are found to be left either trapped in the condensate or
pinned by the obstacle, a vortex dipole or several vortices can be trapped at
the beam center, which enables the possibility of vortex manipulation.
| cond-mat.quant-gas | the surface excitations shape deformation and the formation of persistent current for a gaussian obstacle potential rotating in an highly oblate boseeinstein condensatebecare investigated vortex dipole can be produced and trapped in the center of the stirrer even for slow motion of the stirring beam when the barrier angular velocity is above some critical value the condensate shape can be deformed remarkably according to the rotation frequency due to the existence of plenty of surface wave excitations after a long enough time a few vortices are found to be left either trapped in the condensate or pinned by the obstacle a vortex dipole or several vortices can be trapped at the beam center which enables the possibility of vortex manipulation | [['the', 'surface', 'excitations', 'shape', 'deformation', 'and', 'the', 'formation', 'of', 'persistent', 'current', 'for', 'a', 'gaussian', 'obstacle', 'potential', 'rotating', 'in', 'an', 'highly', 'oblate', 'boseeinstein', 'condensatebecare', 'investigated', 'vortex', 'dipole', 'can', 'be', 'produced', 'and', 'trapped', 'in', 'the', 'center', 'of', 'the', 'stirrer', 'even', 'for', 'slow', 'motion', 'of', 'the', 'stirring', 'beam', 'when', 'the', 'barrier', 'angular', 'velocity', 'is', 'above', 'some', 'critical', 'value', 'the', 'condensate', 'shape', 'can', 'be', 'deformed', 'remarkably', 'according', 'to', 'the', 'rotation', 'frequency', 'due', 'to', 'the', 'existence', 'of', 'plenty', 'of', 'surface', 'wave', 'excitations', 'after', 'a', 'long', 'enough', 'time', 'a', 'few', 'vortices', 'are', 'found', 'to', 'be', 'left', 'either', 'trapped', 'in', 'the', 'condensate', 'or', 'pinned', 'by', 'the', 'obstacle', 'a', 'vortex', 'dipole', 'or', 'several', 'vortices', 'can', 'be', 'trapped', 'at', 'the', 'beam', 'center', 'which', 'enables', 'the', 'possibility', 'of', 'vortex', 'manipulation']] | [-0.16013538967348448, 0.24231524047935324, -0.07572267082825053, 0.036551598589593434, -0.0436402652021341, -0.11470114117676095, -0.0041556260626794414, 0.37894791416322987, -0.2755139506648944, -0.25657834538196, 0.09922501527089939, -0.2261410080514723, -0.019687806878301527, 0.19152181373298668, -0.0009745114410546522, 0.061601956414074455, 0.016974640360587285, 0.05842677002162242, -0.02385888941891241, -0.1740607339996422, 0.2981757944393042, 0.03299455492984222, 0.27920380255066546, 0.06888939351813883, 0.03125013066690509, -0.036902119456438204, 0.09928335477167569, 0.012124571160199571, -0.10907935914231323, 0.07456678136040558, 0.1672820499119889, -0.017851663988177516, 0.22812501034315893, -0.4907307005291726, -0.1845798430056507, 0.10523553975239522, 0.24509042252134924, 0.20519717095885426, -0.08149354299530387, -0.3239282170122787, 0.017508896637097503, -0.14740913993084193, -0.24926606584105546, -0.06848854530884438, 0.07690367878986006, 0.07781824384260327, -0.22026991593052767, 0.09136695983455743, 0.09172192369167059, 0.03645105434565985, -0.09725403484395322, -0.033808995421756714, -0.07350954810204376, 0.04024151022699583, 0.04888508319189506, 0.08384911503110613, 0.199857417670149, -0.19546624015627367, -0.04942478911810312, 0.39117586664354603, -0.05147883114052795, -0.18482038322366587, 0.14448394706989287, -0.19055471716824324, 0.0067643130847699, 0.22437280864149584, 0.14855682757240915, 0.10070888643317363, -0.09655886667963028, 0.001301652441748238, -0.017039069514442822, 0.1535766386747861, 0.1616887219148461, -0.010723724875192181, 0.38076027561010434, 0.1714241716897256, 0.08145730093340664, 0.12812146154611895, -0.19429799748443755, -0.10267810912082802, -0.2723513482287213, -0.1030549986939486, -0.20180652542587588, 0.029438024307889745, -0.019890151917689846, -0.1525096363591484, 0.3744037756618081, 0.06173323401242119, 0.21202557773780303, -0.05483125562548731, 0.268774682867239, 0.11371820505332797, 0.08107680174866456, 0.06791987441315808, 0.2772356046673337, 0.1427660366665071, 0.09484231063485646, -0.2831049454848462, -0.0017462481251534294, 0.006295014724542363] |
1,802.09348 | Game of the Cursed Prince based on Android | Nowadays Games become an entertainment alternative for various circles,
industry and game development business is also a profitable industry. In
Indonesia the amount of game consumption is very high, especially the console
game type RPG (Role Playing Game). The task of this research is developing game
software using Unity 3D to create an Android-based RPG game app. The story is
packed with RPG genres so the player can feel the main role of the storys
imagination. The game to be built is a game titled The Cursed Prince. Users
will get the sensation of royal adventure. Multiplayer game system, graphics in
3D game, The main character in this game is Prince, enemies in this game are
wizards and monsters, Game is not limited time to complete. And the game can be
saved, so it can be reopened. The game of The Cursed Prince can be part of
Indonesian Industry Gaming development.
| cs.CY | nowadays games become an entertainment alternative for various circles industry and game development business is also a profitable industry in indonesia the amount of game consumption is very high especially the console game type rpg role playing game the task of this research is developing game software using unity 3d to create an androidbased rpg game app the story is packed with rpg genres so the player can feel the main role of the storys imagination the game to be built is a game titled the cursed prince users will get the sensation of royal adventure multiplayer game system graphics in 3d game the main character in this game is prince enemies in this game are wizards and monsters game is not limited time to complete and the game can be saved so it can be reopened the game of the cursed prince can be part of indonesian industry gaming development | [['nowadays', 'games', 'become', 'an', 'entertainment', 'alternative', 'for', 'various', 'circles', 'industry', 'and', 'game', 'development', 'business', 'is', 'also', 'a', 'profitable', 'industry', 'in', 'indonesia', 'the', 'amount', 'of', 'game', 'consumption', 'is', 'very', 'high', 'especially', 'the', 'console', 'game', 'type', 'rpg', 'role', 'playing', 'game', 'the', 'task', 'of', 'this', 'research', 'is', 'developing', 'game', 'software', 'using', 'unity', '3d', 'to', 'create', 'an', 'androidbased', 'rpg', 'game', 'app', 'the', 'story', 'is', 'packed', 'with', 'rpg', 'genres', 'so', 'the', 'player', 'can', 'feel', 'the', 'main', 'role', 'of', 'the', 'storys', 'imagination', 'the', 'game', 'to', 'be', 'built', 'is', 'a', 'game', 'titled', 'the', 'cursed', 'prince', 'users', 'will', 'get', 'the', 'sensation', 'of', 'royal', 'adventure', 'multiplayer', 'game', 'system', 'graphics', 'in', '3d', 'game', 'the', 'main', 'character', 'in', 'this', 'game', 'is', 'prince', 'enemies', 'in', 'this', 'game', 'are', 'wizards', 'and', 'monsters', 'game', 'is', 'not', 'limited', 'time', 'to', 'complete', 'and', 'the', 'game', 'can', 'be', 'saved', 'so', 'it', 'can', 'be', 'reopened', 'the', 'game', 'of', 'the', 'cursed', 'prince', 'can', 'be', 'part', 'of', 'indonesian', 'industry', 'gaming', 'development']] | [-0.08542292922833897, 0.059425643116539494, -0.16405564438650347, 0.11529627605803952, -0.14040980948943224, -0.20173091301386128, 0.012511401593342842, 0.379661183754932, -0.24975093193228867, -0.3517000950897569, 0.12928718495312214, -0.30763010626708137, -0.19168424293158318, 0.10691137198784345, -0.26674821752043354, -0.060202600061276694, 0.10615542279525556, 0.07347901954796683, 0.16131540372141248, -0.3215031328160834, 0.2664132038199201, 0.0473608417815794, 0.24741315732814914, 0.07624254833262364, 0.03740255290870586, -0.030097363059893127, 0.011227889014222961, 0.03217716664322559, -0.0716838817519216, 0.09938453212657956, 0.36580152563374513, 0.24471428044855792, 0.4627563094547549, -0.43333089175257855, -0.06644291943093354, 0.11066590149159118, 0.13510052646689166, 0.0898640177980534, -0.059933479219237154, -0.32093345956099745, 0.07504463953271336, -0.24725295064218392, -0.04158116969613772, 0.0038041079984299396, 0.02549245316744936, -0.035241467807293925, -0.24654639414156979, -0.13408136913812693, -0.018784865592020434, 0.1378991353442732, 0.020029900452917724, -0.11764675084214707, -0.02305675003853386, 0.2860070936295469, 0.009966420289591596, 0.03823876654457868, 0.18409953265765447, -0.19559286280831212, -0.18236879472056441, 0.432937806805238, -0.021897312039386062, -0.10898006026978475, 0.10938028270218349, -0.05831182319115823, -0.11171008482735777, 0.051254826324081376, 0.1718472516320689, 0.0997894680465183, -0.15625290541188014, 0.0520070638644065, -0.08682502449693665, 0.19213436610552648, 0.06220839601565177, -0.031334391027220236, 0.21603162038380538, 0.2558801803608357, 0.09189269383320746, 0.1003374408480298, 0.05816175342253749, -0.20661762619502103, -0.16623848232877014, -0.1964041638968278, -0.13076937787499995, 0.010272100165471688, -0.048069727094863256, -0.1612019601543218, 0.3343644608984029, 0.1402659308078964, -0.01857429253714566, 0.03202258645778904, 0.29951508349387457, 0.05141576002074393, 0.05703285672634051, 0.06239466590360455, 0.181569117192327, 0.021903599760439617, 0.3058597723281147, -0.13506373921902665, 0.13255467909443752, 0.054623677452335394] |
1,802.09349 | OpenQSEI: a MATLAB package for Quasi Static Elasticity Imaging | Quasi Static Elasticity Imaging (QSEI) aims to computationally reconstruct
the inhomogeneous distribution of the elastic modulus using a measured
displacement field. QSEI is a well-established imaging modality used in medical
imaging for localizing tissue abnormalities. More recently, QSEI has shown
promise in applications of structural health monitoring and materials
characterization. Despite the growing usage of QSEI in multiple fields,
fully-executable open source packages are not readily available. To address
this, OpenQSEI is developed using a MATLAB platform and shared in an online
community setting for continual algorithmic improvement. In this article, we
describe the mathematical background of QSEI and demonstrate the basic
functionalities of OpenQSEI with examples.
| physics.comp-ph | quasi static elasticity imaging qsei aims to computationally reconstruct the inhomogeneous distribution of the elastic modulus using a measured displacement field qsei is a wellestablished imaging modality used in medical imaging for localizing tissue abnormalities more recently qsei has shown promise in applications of structural health monitoring and materials characterization despite the growing usage of qsei in multiple fields fullyexecutable open source packages are not readily available to address this openqsei is developed using a matlab platform and shared in an online community setting for continual algorithmic improvement in this article we describe the mathematical background of qsei and demonstrate the basic functionalities of openqsei with examples | [['quasi', 'static', 'elasticity', 'imaging', 'qsei', 'aims', 'to', 'computationally', 'reconstruct', 'the', 'inhomogeneous', 'distribution', 'of', 'the', 'elastic', 'modulus', 'using', 'a', 'measured', 'displacement', 'field', 'qsei', 'is', 'a', 'wellestablished', 'imaging', 'modality', 'used', 'in', 'medical', 'imaging', 'for', 'localizing', 'tissue', 'abnormalities', 'more', 'recently', 'qsei', 'has', 'shown', 'promise', 'in', 'applications', 'of', 'structural', 'health', 'monitoring', 'and', 'materials', 'characterization', 'despite', 'the', 'growing', 'usage', 'of', 'qsei', 'in', 'multiple', 'fields', 'fullyexecutable', 'open', 'source', 'packages', 'are', 'not', 'readily', 'available', 'to', 'address', 'this', 'openqsei', 'is', 'developed', 'using', 'a', 'matlab', 'platform', 'and', 'shared', 'in', 'an', 'online', 'community', 'setting', 'for', 'continual', 'algorithmic', 'improvement', 'in', 'this', 'article', 'we', 'describe', 'the', 'mathematical', 'background', 'of', 'qsei', 'and', 'demonstrate', 'the', 'basic', 'functionalities', 'of', 'openqsei', 'with', 'examples']] | [-0.06385711027318254, 0.03836369782346502, -0.058682961015550136, 0.03987411896769817, -0.10339478565415797, -0.13601743804667002, -0.04037919170402277, 0.4259159265177284, -0.2879760521284949, -0.2804330480105888, 0.1222862071444979, -0.25708296796074137, -0.1814446701632383, 0.2416974154721874, -0.09654906726567648, 0.09314012921039158, 0.06887616017439331, 0.002790180549849398, -0.012770075883823805, -0.20876385391798416, 0.23270750385843433, 0.04657286736003768, 0.34088234735939366, 0.06556118071491185, 0.09385474728277096, 0.05049383799240996, -0.060087132097508475, 0.04477612164247638, -0.11164692283357279, 0.18938313229815462, 0.3551930636660053, 0.1775898176173751, 0.3072035902833494, -0.4270499167390741, -0.2520562828643821, 0.06783122146645418, 0.14605052720323258, 0.10510547895319178, -0.11422532761333479, -0.27604753324367964, 0.06411866338077324, -0.14648673991010022, -0.14091862961560345, -0.11128458518830414, 0.012438968219122706, -5.118187646775578e-05, -0.24663590164317822, 0.06332818825970978, -0.025345703664173085, 0.15812154426664796, -0.11600565571167792, -0.0742895649611735, 0.06288159144997525, 0.137346073882117, 0.004953529743943363, 0.0436718472181103, 0.13485806415197799, -0.1946993992314674, -0.12047462926532787, 0.3538186463164703, -0.013449501667100076, -0.1518844964940889, 0.22367857260486254, -0.08014543843343674, -0.13496645445523497, 0.1182581706021805, 0.19817039591725916, 0.08667130976055677, -0.2536542523974696, 0.09638404499240166, 0.019305317164533056, 0.17209210327732413, 0.06508386461288095, 0.024268075846171435, 0.15821622937577418, 0.23301313668847656, 0.006378357047931506, 0.1785762235421526, -0.08641906994251677, -0.02316794560577434, -0.22010685977707348, -0.19199508446427688, -0.18388794477840958, 0.0037585050104098627, -0.030667908793755208, -0.20853534413478114, 0.3852862923835906, 0.18120274131293768, 0.07728366305393418, -0.01859367519724541, 0.3173820817755768, 0.0008625523769296706, 0.10991878820081744, 0.04930682518394091, 0.21327987106409496, 0.13463232651254378, 0.16441320594010625, -0.15462432675905383, 0.07043605368100823, -0.026356296830971796] |
1,802.0935 | Inter-Theory Relations in Physics: Case Studies from Quantum Mechanics
and Quantum Field Theory | The relationship that is widely presumed to hold between physical theories
and their successors, in which the successors in some sense explain the success
of the theories they replace, is known commonly as 'reduction.' I argue that
one traditional approach to theory reduction in physics, founded on the notion
that a superseded theory should simply be a mathematical limit of the theory
that supersedes it, is misleading as a general picture of the relationship
whereby one theory encompasses the domain of empirical validity of another. I
defend an alternative account that builds upon a certain general type of
relationship between dynamical systems models describing the same physical
system. I demonstrate how this particular relationship resembles the
methodological prescriptions set out by Ernest Nagel's more general approach to
reduction across the sciences.
After clarifying these points of general methodology, I go on to apply this
approach to a number of particular inter-theory reductions in physics involving
quantum theory. I consider three reductions: first, connecting classical
mechanics and non-relativistic quantum mechanics; second, connecting classical
electrodynamics and quantum electrodynamics; and third, connecting
non-relativistic quantum mechanics and quantum electrodynamics. In all cases, a
certain core set of mechanisms, employing decoherence together with variations
of Ehrenfest's Theorem, serves to underwrite the occurrence of approximately
classical behavior. For concreteness, I consider two particular realist
interpretations of quantum theory - the Everett and Bohm theories - as
potential bases for these reductions. However, many of the technical results
concerning these reductions pertain also more generally to the bare,
uninterpreted formalism of quantum theory.
| quant-ph | the relationship that is widely presumed to hold between physical theories and their successors in which the successors in some sense explain the success of the theories they replace is known commonly as reduction i argue that one traditional approach to theory reduction in physics founded on the notion that a superseded theory should simply be a mathematical limit of the theory that supersedes it is misleading as a general picture of the relationship whereby one theory encompasses the domain of empirical validity of another i defend an alternative account that builds upon a certain general type of relationship between dynamical systems models describing the same physical system i demonstrate how this particular relationship resembles the methodological prescriptions set out by ernest nagels more general approach to reduction across the sciences after clarifying these points of general methodology i go on to apply this approach to a number of particular intertheory reductions in physics involving quantum theory i consider three reductions first connecting classical mechanics and nonrelativistic quantum mechanics second connecting classical electrodynamics and quantum electrodynamics and third connecting nonrelativistic quantum mechanics and quantum electrodynamics in all cases a certain core set of mechanisms employing decoherence together with variations of ehrenfests theorem serves to underwrite the occurrence of approximately classical behavior for concreteness i consider two particular realist interpretations of quantum theory the everett and bohm theories as potential bases for these reductions however many of the technical results concerning these reductions pertain also more generally to the bare uninterpreted formalism of quantum theory | [['the', 'relationship', 'that', 'is', 'widely', 'presumed', 'to', 'hold', 'between', 'physical', 'theories', 'and', 'their', 'successors', 'in', 'which', 'the', 'successors', 'in', 'some', 'sense', 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1,802.09351 | An extension theorem for embedded Riemannian symmetric spaces of
non-compact type and an application to their universal property | It is known that a geodesic Y in an abstract reflection space X in the sense
of Loos, without any assumption of differential structure, canonically admits
an action of a 1-parameter subgroup of the group of transvections of X. In this
article, we prove an analog of this result stating that, if X contains an
embedded hyperbolic plane H, then this yields a canonical action of a subgroup
of the transvection group of X isomorphic to a perfect central extension of
PSL(2,R). This result can be further extended to arbitrary Riemannian symmetric
spaces of non-compact type embedded in X and can be used to prove that a
Riemannian symmetric space and, more generally, the Kac-Moody symmetric space
G/K for an algebraically simply connected two-spherical Kac-Moody group G
satisfies a universal property similar to the universal property that the group
G satisfies itself.
| math.GR math.MG | it is known that a geodesic y in an abstract reflection space x in the sense of loos without any assumption of differential structure canonically admits an action of a 1parameter subgroup of the group of transvections of x in this article we prove an analog of this result stating that if x contains an embedded hyperbolic plane h then this yields a canonical action of a subgroup of the transvection group of x isomorphic to a perfect central extension of psl2r this result can be further extended to arbitrary riemannian symmetric spaces of noncompact type embedded in x and can be used to prove that a riemannian symmetric space and more generally the kacmoody symmetric space gk for an algebraically simply connected twospherical kacmoody group g satisfies a universal property similar to the universal property that the group g satisfies itself | [['it', 'is', 'known', 'that', 'a', 'geodesic', 'y', 'in', 'an', 'abstract', 'reflection', 'space', 'x', 'in', 'the', 'sense', 'of', 'loos', 'without', 'any', 'assumption', 'of', 'differential', 'structure', 'canonically', 'admits', 'an', 'action', 'of', 'a', '1parameter', 'subgroup', 'of', 'the', 'group', 'of', 'transvections', 'of', 'x', 'in', 'this', 'article', 'we', 'prove', 'an', 'analog', 'of', 'this', 'result', 'stating', 'that', 'if', 'x', 'contains', 'an', 'embedded', 'hyperbolic', 'plane', 'h', 'then', 'this', 'yields', 'a', 'canonical', 'action', 'of', 'a', 'subgroup', 'of', 'the', 'transvection', 'group', 'of', 'x', 'isomorphic', 'to', 'a', 'perfect', 'central', 'extension', 'of', 'psl2r', 'this', 'result', 'can', 'be', 'further', 'extended', 'to', 'arbitrary', 'riemannian', 'symmetric', 'spaces', 'of', 'noncompact', 'type', 'embedded', 'in', 'x', 'and', 'can', 'be', 'used', 'to', 'prove', 'that', 'a', 'riemannian', 'symmetric', 'space', 'and', 'more', 'generally', 'the', 'kacmoody', 'symmetric', 'space', 'gk', 'for', 'an', 'algebraically', 'simply', 'connected', 'twospherical', 'kacmoody', 'group', 'g', 'satisfies', 'a', 'universal', 'property', 'similar', 'to', 'the', 'universal', 'property', 'that', 'the', 'group', 'g', 'satisfies', 'itself']] | [-0.20342097011916208, 0.09456937101230592, -0.14675572095602804, 0.039860983201692825, -0.1466047980652099, -0.11743942449118575, -0.005449816197629126, 0.3794663306145312, -0.32927003707474384, -0.1850976866315788, 0.0871995309249721, -0.22519528092226196, -0.1392141603979505, 0.1858781958261216, -0.17364633831516904, -0.08054341480437614, 0.03552200971827121, 0.16565032845402372, -0.1261441476206938, -0.25068914896847916, 0.393959529127296, -0.06989507999559733, 0.22020434603934558, -0.010189730782245457, 0.15540750414579058, 0.027001531638900265, 0.024287516723426297, 0.03746561138356977, -0.10958495230227873, 0.10907408672681695, 0.2897572783445021, 0.062076163031185426, 0.19273073986766232, -0.33036643387356274, -0.18720181722482535, 0.23429964484177976, 0.14161877644299137, -0.03488511130751543, -0.05786886354008588, -0.2931158897978529, 0.1337171629985137, -0.1784283778446556, -0.21812845502232373, -0.021358706961749907, 0.0860027045136134, -0.07437400285080387, -0.2478035010752419, -0.006744063231425072, 0.17237682725814446, 0.04691067315526569, -0.02698947205273828, -0.04038030641074752, -0.09807894028342841, 0.06945347867112502, -0.041485747206024826, 0.12679349427344278, 0.07773008086377571, -0.04014796896449874, -0.09684532303543447, 0.40290811908116536, -0.09353390940166616, -0.25240324070991976, 0.0927711943177585, -0.1669456227092256, -0.18088560188057975, 0.14462966003625746, 0.09724469048390821, 0.17041380428643504, -0.07887626503197424, 0.2247181802612572, -0.17542318484916444, 0.1270951012938126, 0.037346182574688545, -0.012392717275873457, 0.10375621113729414, 0.0882909606755252, 0.13804189653568705, 0.12498678855145429, 0.060375366494810526, 0.015691343888814206, -0.38649131196328035, -0.234583632488453, -0.12245542821261218, 0.18620161143866118, -0.12599459837676963, -0.18911422669074276, 0.331841329725879, 0.025015419867204527, 0.15542163998937944, 0.06490639506668693, 0.1731659556037261, 0.06702686569032024, 0.05534987930785602, 0.1134508538787896, 0.0976055333338363, 0.22329583920827004, -0.07646419273436883, -0.1382411374107108, -0.027833263173332096, 0.1629720315120747] |
1,802.09352 | Screening for cancer using a learning Internet advertising system | Studies have shown that the traces people leave when browsing the internet
may indicate the onset of diseases such as cancer. Here we show that the
adaptive engines of advertising systems in conjunction with clinically verified
questionnaires can be used to identify people who are suspected of having one
of three types of solid tumor cancers.
In the first study, 308 people were recruited through ads shown on the Bing
search engine to complete a clinically verified risk questionnaire. A
classifier trained to predict questionnaire response using only past queries on
Bing reached an Area Under the Curve of 0.64 for all three cancer types,
verifying that past searches could be used to identify people with suspected
cancer.
The second study was conducted using the Google ads system in the same
configuration as in the first study. However, in this study the ads system was
set to automatically learn to identify people with suspected cancer. A total of
70,586 people were shown the ads, and 6,484 clicked and were referred to
complete the clinical questionnaires. People from countries with higher
Internet access and lower life expectancy tended to click more on the ads. Over
time the advertisement system learned to identify people who were likely to
have symptoms consistent with suspected cancer, such that the percentage of
people completing the questionnaires and found to have suspected cancer reached
approximately 11\% at the end of the experiment.
These results demonstrate the utility of using search engine queries to
screen for possible cancer and the application of modern advertising systems to
help identify people who are likely suffering from serious medical conditions.
This is especially true in countries where medical services are less developed.
| cs.CY | studies have shown that the traces people leave when browsing the internet may indicate the onset of diseases such as cancer here we show that the adaptive engines of advertising systems in conjunction with clinically verified questionnaires can be used to identify people who are suspected of having one of three types of solid tumor cancers in the first study 308 people were recruited through ads shown on the bing search engine to complete a clinically verified risk questionnaire a classifier trained to predict questionnaire response using only past queries on bing reached an area under the curve of 064 for all three cancer types verifying that past searches could be used to identify people with suspected cancer the second study was conducted using the google ads system in the same configuration as in the first study however in this study the ads system was set to automatically learn to identify people with suspected cancer a total of 70586 people were shown the ads and 6484 clicked and were referred to complete the clinical questionnaires people from countries with higher internet access and lower life expectancy tended to click more on the ads over time the advertisement system learned to identify people who were likely to have symptoms consistent with suspected cancer such that the percentage of people completing the questionnaires and found to have suspected cancer reached approximately 11 at the end of the experiment these results demonstrate the utility of using search engine queries to screen for possible cancer and the application of modern advertising systems to help identify people who are likely suffering from serious medical conditions this is especially true in countries where medical services are less developed | [['studies', 'have', 'shown', 'that', 'the', 'traces', 'people', 'leave', 'when', 'browsing', 'the', 'internet', 'may', 'indicate', 'the', 'onset', 'of', 'diseases', 'such', 'as', 'cancer', 'here', 'we', 'show', 'that', 'the', 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1,802.09353 | Novel Common Vehicle Information Model (CVIM) for Future Automotive
Vehicle Big Data Marketplaces | Even though connectivity services have been introduced in many of the most
recent car models, access to vehicle data is currently limited due to its
proprietary nature. The European project AutoMat has therefore developed an
open Marketplace providing a single point of access for brand-independent
vehicle data. Thereby, vehicle sensor data can be leveraged for the design and
implementation of entirely new services even beyond trafficrelated applications
(such as hyper-local traffic forecasts). This paper presents the architecture
for a Vehicle Big Data Marketplace as enabler of cross-sectorial and innovative
vehicle data services. Therefore, the novel Common Vehicle Information Model
(CVIM) is defined as an open and harmonized data model, allowing the
aggregation of brand-independent and generic data sets. Within this work the
realization of a prototype CVIM and Marketplace implementation is presented.
The two use-cases of local weather prediction and road quality measurements are
introduced to show the applicability of the AutoMat concept and prototype to
non-automotive application
| cs.CY | even though connectivity services have been introduced in many of the most recent car models access to vehicle data is currently limited due to its proprietary nature the european project automat has therefore developed an open marketplace providing a single point of access for brandindependent vehicle data thereby vehicle sensor data can be leveraged for the design and implementation of entirely new services even beyond trafficrelated applications such as hyperlocal traffic forecasts this paper presents the architecture for a vehicle big data marketplace as enabler of crosssectorial and innovative vehicle data services therefore the novel common vehicle information model cvim is defined as an open and harmonized data model allowing the aggregation of brandindependent and generic data sets within this work the realization of a prototype cvim and marketplace implementation is presented the two usecases of local weather prediction and road quality measurements are introduced to show the applicability of the automat concept and prototype to nonautomotive application | [['even', 'though', 'connectivity', 'services', 'have', 'been', 'introduced', 'in', 'many', 'of', 'the', 'most', 'recent', 'car', 'models', 'access', 'to', 'vehicle', 'data', 'is', 'currently', 'limited', 'due', 'to', 'its', 'proprietary', 'nature', 'the', 'european', 'project', 'automat', 'has', 'therefore', 'developed', 'an', 'open', 'marketplace', 'providing', 'a', 'single', 'point', 'of', 'access', 'for', 'brandindependent', 'vehicle', 'data', 'thereby', 'vehicle', 'sensor', 'data', 'can', 'be', 'leveraged', 'for', 'the', 'design', 'and', 'implementation', 'of', 'entirely', 'new', 'services', 'even', 'beyond', 'trafficrelated', 'applications', 'such', 'as', 'hyperlocal', 'traffic', 'forecasts', 'this', 'paper', 'presents', 'the', 'architecture', 'for', 'a', 'vehicle', 'big', 'data', 'marketplace', 'as', 'enabler', 'of', 'crosssectorial', 'and', 'innovative', 'vehicle', 'data', 'services', 'therefore', 'the', 'novel', 'common', 'vehicle', 'information', 'model', 'cvim', 'is', 'defined', 'as', 'an', 'open', 'and', 'harmonized', 'data', 'model', 'allowing', 'the', 'aggregation', 'of', 'brandindependent', 'and', 'generic', 'data', 'sets', 'within', 'this', 'work', 'the', 'realization', 'of', 'a', 'prototype', 'cvim', 'and', 'marketplace', 'implementation', 'is', 'presented', 'the', 'two', 'usecases', 'of', 'local', 'weather', 'prediction', 'and', 'road', 'quality', 'measurements', 'are', 'introduced', 'to', 'show', 'the', 'applicability', 'of', 'the', 'automat', 'concept', 'and', 'prototype', 'to', 'nonautomotive', 'application']] | [-0.14065968906447196, 0.005971963805607699, -0.04404290418815202, 0.021824943150232475, -0.11766556363242368, -0.1747138926651902, 0.0805137286205979, 0.36542075735110885, -0.2594994476000862, -0.33708008783809745, 0.1853034998273823, -0.278813055716455, -0.11575742198478203, 0.2344678736811217, -0.1391710159055387, 0.11120092373330874, 0.09425629359574463, 0.009037686093973044, 0.052520398217707105, -0.23326617676931888, 0.26276823771574226, 0.0897637876168562, 0.3460025869814369, 0.0944278244726145, 0.09765169486248244, 0.0020676238808589866, -0.04548613920819779, -0.02539504044211637, -0.06395670668914533, 0.17526364581396756, 0.34217185092574, 0.22995538595848933, 0.29732183386714983, -0.4317558944129791, -0.21325680809782055, 0.06805959446893002, 0.12587872002861844, 0.04968525563629392, -0.0641862563419496, -0.3466653445532593, 0.08293007668066238, -0.26720159750981015, -0.13420949004984534, -0.08557404007371634, 0.015103960544085847, 0.00987642551234995, -0.29029060520518285, -0.049174623005689144, -0.02546654023283806, 0.086506090968704, -0.05000997947466273, -0.05282060786162336, 0.0062563001351335495, 0.20324345817490935, 0.019050415093750835, 0.029088686879288454, 0.1338090921023813, -0.14320841711611512, -0.1519922596993498, 0.42961121352914816, 0.021631433062840443, -0.13543684791418342, 0.1750507712459717, -0.016182376597172175, -0.14386799573623696, 0.048245117732455045, 0.23095855968653595, 0.031045479580568962, -0.24880902691541287, 0.05689121202382152, -0.019424992883264516, 0.12253675439924103, 0.008331042705461957, 0.022279901649408903, 0.17621062245243826, 0.29194975178688765, 0.11394742272237543, 0.08076599418433407, -0.10390293815185149, -0.09197493547645326, -0.20964703265016374, -0.1560340323142158, -0.18040045918538594, -0.009330280280361572, -0.06700244541990777, -0.14406417124719623, 0.3702878235982588, 0.21292450680331781, 0.1465991935782278, 0.010965164623951588, 0.37156120925628316, 0.011055011720133897, 0.08941919581654172, 0.10940901393321557, 0.13133024067755264, -0.007312981364054558, 0.20248736084426922, -0.1123872804395759, 0.10986142785240634, -0.013578121302625498] |
1,802.09354 | Low Intensity LiDAR using Compressed Sensing and a Photon Number
Resolving Detector | LiDAR (laser based radar) systems are a major part of many new real-world
interactive systems, one of the most notable being autonomous cars. The current
market LiDAR systems are limited by detector sensitivity: when output power is
at eye-safe levels, the range is limited. Long range operation also slows image
acquisition as flight-time increases. We present an approach that combines a
high sensitivity photon number resolving diode with machine learning and a
micro-mechanical digital mirror device to achieve safe and fast long range 3D
scanning.
| eess.SP physics.ins-det | lidar laser based radar systems are a major part of many new realworld interactive systems one of the most notable being autonomous cars the current market lidar systems are limited by detector sensitivity when output power is at eyesafe levels the range is limited long range operation also slows image acquisition as flighttime increases we present an approach that combines a high sensitivity photon number resolving diode with machine learning and a micromechanical digital mirror device to achieve safe and fast long range 3d scanning | [['lidar', 'laser', 'based', 'radar', 'systems', 'are', 'a', 'major', 'part', 'of', 'many', 'new', 'realworld', 'interactive', 'systems', 'one', 'of', 'the', 'most', 'notable', 'being', 'autonomous', 'cars', 'the', 'current', 'market', 'lidar', 'systems', 'are', 'limited', 'by', 'detector', 'sensitivity', 'when', 'output', 'power', 'is', 'at', 'eyesafe', 'levels', 'the', 'range', 'is', 'limited', 'long', 'range', 'operation', 'also', 'slows', 'image', 'acquisition', 'as', 'flighttime', 'increases', 'we', 'present', 'an', 'approach', 'that', 'combines', 'a', 'high', 'sensitivity', 'photon', 'number', 'resolving', 'diode', 'with', 'machine', 'learning', 'and', 'a', 'micromechanical', 'digital', 'mirror', 'device', 'to', 'achieve', 'safe', 'and', 'fast', 'long', 'range', '3d', 'scanning']] | [-0.12973093467161936, 0.11648613663325223, -0.012666339024572688, -0.012893305239541566, -0.06644667421522386, -0.21364817248027335, 0.005257017250337145, 0.4281310381696505, -0.25524110364152447, -0.3602150754838744, 0.11256073592710035, -0.29391561317093234, -0.09025482123388964, 0.32868091241894837, -0.15736882193561863, 0.13823413965703152, 0.10142476946279845, -0.04695370028562405, 0.013689518788391176, -0.16903653565575094, 0.22599598685936892, 0.0845775691408883, 0.3463849660830901, 0.007239997901898973, 0.19099634297959067, 0.03523324775126051, 0.015607833626050064, -0.036856495857457906, 0.004212267397858394, 0.09099336298292174, 0.3304289935485405, 0.15364628831910737, 0.3146351237890913, -0.4149631295572309, -0.22335785734741126, 0.07433851416743197, 0.135012164098375, 0.09295231337549494, -0.0632375390652348, -0.2798217054346905, 0.08765345075277282, -0.21061139214126504, -0.05821293468094047, -0.08974397285184, 0.01048147029188626, 0.05648555819164304, -0.2371602234814097, -0.019054117853931317, -0.008790804497788058, 0.13628279552521075, -0.00459740403765703, -0.06337529835565126, 0.0398058378849836, 0.15157847077866524, -0.03452382590347791, 0.041090841509182664, 0.220838459183955, -0.1868228596087326, -0.10182259105529418, 0.3621018464950954, -0.03006733193007462, -0.09486698175177855, 0.23301699420382432, -0.11721912116798408, -0.07146800043342141, 0.19490491120035158, 0.18776178856599418, 0.11080739766030627, -0.15852832422567778, 0.005423435567439917, 0.03372256664887947, 0.24618251105250025, 0.08828315220992355, 0.0793301431058139, 0.22995724637499626, 0.3130448591922793, 0.12139840319903349, 0.09661855224300833, -0.17103072450023746, -0.05658315505750258, -0.2172320265761193, -0.10020387821337756, -0.18987269457429648, 0.008919295186505598, -0.07368106835980572, -0.10944495591170647, 0.3330329422674635, 0.2037978185888599, 0.14671395668650375, 0.03774163164472317, 0.4284784079474561, 0.10725916774587377, 0.06656096060486401, 0.0037706702728481853, 0.22135773645713924, 0.04931093618438086, 0.20320436996681726, -0.18100245987229488, -0.010256919067572146, -0.04422539252897396] |
1,802.09355 | Teaching Autonomous Driving Using a Modular and Integrated Approach | Autonomous driving is not one single technology but rather a complex system
integrating many technologies, which means that teaching autonomous driving is
a challenging task. Indeed, most existing autonomous driving classes focus on
one of the technologies involved. This not only fails to provide a
comprehensive coverage, but also sets a high entry barrier for students with
different technology backgrounds. In this paper, we present a modular,
integrated approach to teaching autonomous driving. Specifically, we organize
the technologies used in autonomous driving into modules. This is described in
the textbook we have developed as well as a series of multimedia online
lectures designed to provide technical overview for each module. Then, once the
students have understood these modules, the experimental platforms for
integration we have developed allow the students to fully understand how the
modules interact with each other. To verify this teaching approach, we present
three case studies: an introductory class on autonomous driving for students
with only a basic technology background; a new session in an existing embedded
systems class to demonstrate how embedded system technologies can be applied to
autonomous driving; and an industry professional training session to quickly
bring up experienced engineers to work in autonomous driving. The results show
that students can maintain a high interest level and make great progress by
starting with familiar concepts before moving onto other modules.
| cs.CY cs.AI cs.RO | autonomous driving is not one single technology but rather a complex system integrating many technologies which means that teaching autonomous driving is a challenging task indeed most existing autonomous driving classes focus on one of the technologies involved this not only fails to provide a comprehensive coverage but also sets a high entry barrier for students with different technology backgrounds in this paper we present a modular integrated approach to teaching autonomous driving specifically we organize the technologies used in autonomous driving into modules this is described in the textbook we have developed as well as a series of multimedia online lectures designed to provide technical overview for each module then once the students have understood these modules the experimental platforms for integration we have developed allow the students to fully understand how the modules interact with each other to verify this teaching approach we present three case studies an introductory class on autonomous driving for students with only a basic technology background a new session in an existing embedded systems class to demonstrate how embedded system technologies can be applied to autonomous driving and an industry professional training session to quickly bring up experienced engineers to work in autonomous driving the results show that students can maintain a high interest level and make great progress by starting with familiar concepts before moving onto other modules | [['autonomous', 'driving', 'is', 'not', 'one', 'single', 'technology', 'but', 'rather', 'a', 'complex', 'system', 'integrating', 'many', 'technologies', 'which', 'means', 'that', 'teaching', 'autonomous', 'driving', 'is', 'a', 'challenging', 'task', 'indeed', 'most', 'existing', 'autonomous', 'driving', 'classes', 'focus', 'on', 'one', 'of', 'the', 'technologies', 'involved', 'this', 'not', 'only', 'fails', 'to', 'provide', 'a', 'comprehensive', 'coverage', 'but', 'also', 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1,802.09356 | A Learning-based Stochastic MPC Design for Cooperative Adaptive Cruise
Control to Handle Interfering Vehicles | Vehicle to Vehicle (V2V) communication has a great potential to improve
reaction accuracy of different driver assistance systems in critical driving
situations. Cooperative Adaptive Cruise Control (CACC), which is an automated
application, provides drivers with extra benefits such as traffic throughput
maximization and collision avoidance. CACC systems must be designed in a way
that are sufficiently robust against all special maneuvers such as cutting-into
the CACC platoons by interfering vehicles or hard braking by leading cars. To
address this problem, a Neural- Network (NN)-based cut-in detection and
trajectory prediction scheme is proposed in the first part of this paper. Next,
a probabilistic framework is developed in which the cut-in probability is
calculated based on the output of the mentioned cut-in prediction block.
Finally, a specific Stochastic Model Predictive Controller (SMPC) is designed
which incorporates this cut-in probability to enhance its reaction against the
detected dangerous cut-in maneuver. The overall system is implemented and its
performance is evaluated using realistic driving scenarios from Safety Pilot
Model Deployment (SPMD).
| cs.SY | vehicle to vehicle v2v communication has a great potential to improve reaction accuracy of different driver assistance systems in critical driving situations cooperative adaptive cruise control cacc which is an automated application provides drivers with extra benefits such as traffic throughput maximization and collision avoidance cacc systems must be designed in a way that are sufficiently robust against all special maneuvers such as cuttinginto the cacc platoons by interfering vehicles or hard braking by leading cars to address this problem a neural network nnbased cutin detection and trajectory prediction scheme is proposed in the first part of this paper next a probabilistic framework is developed in which the cutin probability is calculated based on the output of the mentioned cutin prediction block finally a specific stochastic model predictive controller smpc is designed which incorporates this cutin probability to enhance its reaction against the detected dangerous cutin maneuver the overall system is implemented and its performance is evaluated using realistic driving scenarios from safety pilot model deployment spmd | [['vehicle', 'to', 'vehicle', 'v2v', 'communication', 'has', 'a', 'great', 'potential', 'to', 'improve', 'reaction', 'accuracy', 'of', 'different', 'driver', 'assistance', 'systems', 'in', 'critical', 'driving', 'situations', 'cooperative', 'adaptive', 'cruise', 'control', 'cacc', 'which', 'is', 'an', 'automated', 'application', 'provides', 'drivers', 'with', 'extra', 'benefits', 'such', 'as', 'traffic', 'throughput', 'maximization', 'and', 'collision', 'avoidance', 'cacc', 'systems', 'must', 'be', 'designed', 'in', 'a', 'way', 'that', 'are', 'sufficiently', 'robust', 'against', 'all', 'special', 'maneuvers', 'such', 'as', 'cuttinginto', 'the', 'cacc', 'platoons', 'by', 'interfering', 'vehicles', 'or', 'hard', 'braking', 'by', 'leading', 'cars', 'to', 'address', 'this', 'problem', 'a', 'neural', 'network', 'nnbased', 'cutin', 'detection', 'and', 'trajectory', 'prediction', 'scheme', 'is', 'proposed', 'in', 'the', 'first', 'part', 'of', 'this', 'paper', 'next', 'a', 'probabilistic', 'framework', 'is', 'developed', 'in', 'which', 'the', 'cutin', 'probability', 'is', 'calculated', 'based', 'on', 'the', 'output', 'of', 'the', 'mentioned', 'cutin', 'prediction', 'block', 'finally', 'a', 'specific', 'stochastic', 'model', 'predictive', 'controller', 'smpc', 'is', 'designed', 'which', 'incorporates', 'this', 'cutin', 'probability', 'to', 'enhance', 'its', 'reaction', 'against', 'the', 'detected', 'dangerous', 'cutin', 'maneuver', 'the', 'overall', 'system', 'is', 'implemented', 'and', 'its', 'performance', 'is', 'evaluated', 'using', 'realistic', 'driving', 'scenarios', 'from', 'safety', 'pilot', 'model', 'deployment', 'spmd']] | [-0.17450285105158136, 0.03357035108270048, -0.05161810796238, 0.030085501031030016, -0.06934959502997304, -0.22702783087818287, 0.056255374403939726, 0.3781831409804613, -0.23843451869303742, -0.310635983256668, 0.11885628742889953, -0.2202532986846629, -0.18355349455932043, 0.1827578424624762, -0.16923686151016862, 0.14428934985799827, 0.08413011284898518, 0.0451348305817312, 0.06200380844406991, -0.21416206937283278, 0.2539245518771595, 0.10823733000511146, 0.3253324889516211, 0.04817391685574843, 0.12900046888649105, 0.02070078618140016, 0.030394423716555697, -0.004796735795792641, -0.04125766711982271, 0.08835933630211638, 0.30180070372382517, 0.18667041825927255, 0.32204579785522297, -0.42636030253741036, -0.2712924266738974, 0.10978404047663312, 0.1513629024313603, 0.06265026586220028, -0.04230199001588528, -0.3433489286206124, 0.11326437821774463, -0.2818256052412901, -0.10248506844817963, -0.06078538495250585, -0.02528383433594402, 0.058757857503706074, -0.33781722651974083, -0.03588619943903142, -0.007921522532320436, 0.050203741393444766, -0.07562046734677874, -0.03411560597288119, -0.009144804145893958, 0.20107306827684437, 0.047132647324897664, 0.03880851347376705, 0.20536240422572233, -0.13009370624996633, -0.15792002844770092, 0.420297224102654, 0.007008985691656168, -0.21649122277992855, 0.17699818776293477, 0.003138381777420999, -0.10638232053403394, 0.13222070271079148, 0.2671979663652334, 0.08591649733471168, -0.21288968143558287, -0.01617087149208535, 0.0438184623412945, 0.14986499273975615, 0.030873561735231293, -0.032309223474171686, 0.15096691355785266, 0.28116965213655887, 0.13702339989607257, 0.10370113874760356, -0.10685813178133685, -0.148030839323947, -0.23839647785188203, -0.08659132774807064, -0.1380414632352417, -0.03808332517243787, -0.061890097437107355, -0.06960757509019809, 0.3609438011085386, 0.21545275458822333, 0.10335869468181921, 0.07709567026580201, 0.4371407220970435, 0.11073688928427804, 0.05849354575859405, 0.10771636827287814, 0.22861976921383056, 0.0035287065639059588, 0.1404825265944307, -0.2497033256243533, 0.16665978760862477, 0.031177368312400866] |
1,802.09357 | Udo Pachner (1947-2002) - A "Hidden Champion" in Mathematics | Udo Pachner proved that all simplicial manifolds which are homeomorphic can
be transformed into each other by a sequence of simple transformations now
commonly called "Pachner moves". For a fixed dimension there are only finitely
many types of Pachner moves. This makes it possible to identify invariants by
proving the invariance only for a finite number of transformations. This fact
has proved useful for various applications in p.l. topology and in loop quantum
gravity theory. The paper is meant to honor the importance of Pachner's results
and to make them known to a wider community.
| math.HO math.CO | udo pachner proved that all simplicial manifolds which are homeomorphic can be transformed into each other by a sequence of simple transformations now commonly called pachner moves for a fixed dimension there are only finitely many types of pachner moves this makes it possible to identify invariants by proving the invariance only for a finite number of transformations this fact has proved useful for various applications in pl topology and in loop quantum gravity theory the paper is meant to honor the importance of pachners results and to make them known to a wider community | [['udo', 'pachner', 'proved', 'that', 'all', 'simplicial', 'manifolds', 'which', 'are', 'homeomorphic', 'can', 'be', 'transformed', 'into', 'each', 'other', 'by', 'a', 'sequence', 'of', 'simple', 'transformations', 'now', 'commonly', 'called', 'pachner', 'moves', 'for', 'a', 'fixed', 'dimension', 'there', 'are', 'only', 'finitely', 'many', 'types', 'of', 'pachner', 'moves', 'this', 'makes', 'it', 'possible', 'to', 'identify', 'invariants', 'by', 'proving', 'the', 'invariance', 'only', 'for', 'a', 'finite', 'number', 'of', 'transformations', 'this', 'fact', 'has', 'proved', 'useful', 'for', 'various', 'applications', 'in', 'pl', 'topology', 'and', 'in', 'loop', 'quantum', 'gravity', 'theory', 'the', 'paper', 'is', 'meant', 'to', 'honor', 'the', 'importance', 'of', 'pachners', 'results', 'and', 'to', 'make', 'them', 'known', 'to', 'a', 'wider', 'community']] | [-0.1092327773679999, 0.15517307112013248, -0.1000687126191011, 0.1008172440280682, -0.11219035450894227, -0.1934336930825474, 0.011667114706026351, 0.36634189601829076, -0.32031503458447913, -0.2816528932567924, 0.09098956142205428, -0.23950098221130828, -0.17668749935469252, 0.21587236214706557, -0.15158756021806535, 0.031524915759639935, 0.05467736764632641, 0.0819827582924924, -0.024679223534358825, -0.2869091660893978, 0.3056542509621841, -0.02417005970702566, 0.2344253241143962, 0.03294439349283881, 0.10357236023496916, -0.007601192176460903, -0.02769727773587913, 0.07603485512106303, -0.12877662191850175, 0.1084693719303493, 0.3097071041343139, 0.12494232705199813, 0.2567619366293892, -0.37276781598066394, -0.21512708148146245, 0.12953384983120486, 0.138503450053209, 0.10985959747167146, -0.019767046113439064, -0.27793936269912634, 0.13231427104588836, -0.11670580004376577, -0.14276017003910654, -0.11300759458359569, 0.08063600560095399, -0.027354073354062883, -0.1935458594110814, -0.06944919482586866, 0.09906108545057693, 0.04501728188405012, 0.02523479758801454, -0.07611554493988923, -0.07383527228375897, 0.1588653201234844, 0.03926999108776688, 0.04765478906499103, 0.09012655543282311, -0.07437660317976978, -0.12492730019693361, 0.4167798576985506, 0.028147304688203843, -0.2244196393641029, 0.2070776948883654, -0.10480372035043671, -0.21817051749082006, 0.12395790039977812, 0.06691319373079595, 0.1362078952890365, -0.15624566631827583, 0.13689456871051855, -0.06858883172947358, 0.10741612148728777, 0.12409210829262404, 0.014864855549952134, 0.1883839507626885, 0.08054808262695974, 0.1316550774295428, 0.1505219907954365, 0.023044143300292953, -0.11808374922467454, -0.30343121743978974, -0.18019373568785477, -0.14610680288441993, 0.08993469803851653, -0.06637054467245569, -0.16915666993628156, 0.35022504702012275, 0.11205064649990898, 0.15284816413607566, 0.0799774934371755, 0.25333500784286794, 0.06565292585799669, 0.11200903081632357, 0.07181442601784588, 0.174467549842604, 0.16305128850062636, 0.026679757311246655, -0.08331302841976682, 0.012004582255959828, 0.14333564234263402] |
1,802.09358 | Detection of Light Sleep Periods Using an Accelerometer Based Alarm
System | Light sleep is a sleeping period which occurs within each hour during the
sleep. This is the period when people are closest to awakening. With this being
the case people tend to move more frequently and aggressively during these
periods. The characteristics of sleeping stages, detection of light sleep
periods and analysis of light sleep periods were clarified. The sleeping
patterns of different subjects were analyzed. In this paper the most suitable
moment for waking a person up will be described. The detection of this moment
and the development process of a system dedicated to this purpose will be
explained, and also some experimental results that are acquired via different
tests will be shared and analyzed.
| cs.CY | light sleep is a sleeping period which occurs within each hour during the sleep this is the period when people are closest to awakening with this being the case people tend to move more frequently and aggressively during these periods the characteristics of sleeping stages detection of light sleep periods and analysis of light sleep periods were clarified the sleeping patterns of different subjects were analyzed in this paper the most suitable moment for waking a person up will be described the detection of this moment and the development process of a system dedicated to this purpose will be explained and also some experimental results that are acquired via different tests will be shared and analyzed | [['light', 'sleep', 'is', 'a', 'sleeping', 'period', 'which', 'occurs', 'within', 'each', 'hour', 'during', 'the', 'sleep', 'this', 'is', 'the', 'period', 'when', 'people', 'are', 'closest', 'to', 'awakening', 'with', 'this', 'being', 'the', 'case', 'people', 'tend', 'to', 'move', 'more', 'frequently', 'and', 'aggressively', 'during', 'these', 'periods', 'the', 'characteristics', 'of', 'sleeping', 'stages', 'detection', 'of', 'light', 'sleep', 'periods', 'and', 'analysis', 'of', 'light', 'sleep', 'periods', 'were', 'clarified', 'the', 'sleeping', 'patterns', 'of', 'different', 'subjects', 'were', 'analyzed', 'in', 'this', 'paper', 'the', 'most', 'suitable', 'moment', 'for', 'waking', 'a', 'person', 'up', 'will', 'be', 'described', 'the', 'detection', 'of', 'this', 'moment', 'and', 'the', 'development', 'process', 'of', 'a', 'system', 'dedicated', 'to', 'this', 'purpose', 'will', 'be', 'explained', 'and', 'also', 'some', 'experimental', 'results', 'that', 'are', 'acquired', 'via', 'different', 'tests', 'will', 'be', 'shared', 'and', 'analyzed']] | [-0.12287042293484837, 0.22183729899677865, -0.11233937884440068, 0.07034480351318241, -0.07522412031439357, -0.16240459379884575, 0.07812824255008058, 0.40364505360224123, -0.22667754240482563, -0.29390370560777856, 0.1694198205438844, -0.26988628763953376, -0.16150934551039647, 0.20179691300566854, -0.14253201824813633, -0.004986700355998594, 0.13028109964416845, 0.09816087915056289, 0.006916947969925943, -0.3087636423257083, 0.23495779227433278, 0.04266917076893151, 0.2619366078428796, -0.004117242124830854, 0.00019959736904450533, -0.0033018275862559676, -0.04505029939022718, -0.03481158416252583, -0.04619124295935888, 0.09306768016038655, 0.30086003684695684, 0.14899777429547675, 0.31483789835655096, -0.44810062136244155, -0.18368714973169925, 0.10211800764051893, 0.13125799907821006, 0.0763833060537481, 0.003695473341238163, -0.322211770499366, 0.1313671374308138, -0.14004499900580286, -0.10682875647787647, -0.013405583871143132, 0.05039432794979677, 0.03121907714401083, -0.22736695536476528, 0.046893285998647054, -0.015289919226077097, 0.09044206253220809, -0.07808684974162165, -0.09299740549839294, 0.020609225559947562, 0.20356675762013765, 0.1389533575954907, 0.018578253983487857, 0.14968908027793956, -0.08715124965990605, -0.11140854846172292, 0.3466679187619994, 0.035774931246876425, -0.10399417611288614, 0.19533059836750657, -0.14931428617725534, -0.13059537983820613, 0.11003059583138032, 0.20303804068504994, 0.1280106174687309, -0.18615955873736248, -0.11581901147210688, 0.022265130517490465, 0.17394459637680798, 0.12419560793506239, -0.023010981353481525, 0.22380156139040303, 0.21005506684064287, -0.02822299944317161, 0.09667459294573276, -0.1408377452512625, -0.07937418787483254, -0.2579631296604679, -0.1508246900810828, -0.12482643279985621, 0.024553527364081798, -0.016932735054383398, -0.05321567926901104, 0.4632258471262095, 0.1169267464027708, 0.16428578845706993, 0.030811251727221853, 0.27609418894581755, 0.0909138884844965, 0.07165497203346478, 0.06027031507632085, 0.23433024874323344, 0.017149840446642164, 0.17878139017406722, -0.1854451274085822, 0.11602668490678329, -0.025936828948284404] |
1,802.09359 | A Deep Learning Approach for Privacy Preservation in Assisted Living | In the era of Internet of Things (IoT) technologies the potential for privacy
invasion is becoming a major concern especially in regards to healthcare data
and Ambient Assisted Living (AAL) environments. Systems that offer AAL
technologies make extensive use of personal data in order to provide services
that are context-aware and personalized. This makes privacy preservation a very
important issue especially since the users are not always aware of the privacy
risks they could face. A lot of progress has been made in the deep learning
field, however, there has been lack of research on privacy preservation of
sensitive personal data with the use of deep learning. In this paper we focus
on a Long Short Term Memory (LSTM) Encoder-Decoder, which is a principal
component of deep learning, and propose a new encoding technique that allows
the creation of different AAL data views, depending on the access level of the
end user and the information they require access to. The efficiency and
effectiveness of the proposed method are demonstrated with experiments on a
simulated AAL dataset. Qualitatively, we show that the proposed model learns
privacy operations such as disclosure, deletion and generalization and can
perform encoding and decoding of the data with almost perfect recovery.
| eess.SP cs.LG | in the era of internet of things iot technologies the potential for privacy invasion is becoming a major concern especially in regards to healthcare data and ambient assisted living aal environments systems that offer aal technologies make extensive use of personal data in order to provide services that are contextaware and personalized this makes privacy preservation a very important issue especially since the users are not always aware of the privacy risks they could face a lot of progress has been made in the deep learning field however there has been lack of research on privacy preservation of sensitive personal data with the use of deep learning in this paper we focus on a long short term memory lstm encoderdecoder which is a principal component of deep learning and propose a new encoding technique that allows the creation of different aal data views depending on the access level of the end user and the information they require access to the efficiency and effectiveness of the proposed method are demonstrated with experiments on a simulated aal dataset qualitatively we show that the proposed model learns privacy operations such as disclosure deletion and generalization and can perform encoding and decoding of the data with almost perfect recovery | [['in', 'the', 'era', 'of', 'internet', 'of', 'things', 'iot', 'technologies', 'the', 'potential', 'for', 'privacy', 'invasion', 'is', 'becoming', 'a', 'major', 'concern', 'especially', 'in', 'regards', 'to', 'healthcare', 'data', 'and', 'ambient', 'assisted', 'living', 'aal', 'environments', 'systems', 'that', 'offer', 'aal', 'technologies', 'make', 'extensive', 'use', 'of', 'personal', 'data', 'in', 'order', 'to', 'provide', 'services', 'that', 'are', 'contextaware', 'and', 'personalized', 'this', 'makes', 'privacy', 'preservation', 'a', 'very', 'important', 'issue', 'especially', 'since', 'the', 'users', 'are', 'not', 'always', 'aware', 'of', 'the', 'privacy', 'risks', 'they', 'could', 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