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706.2014
|
Fourier analysis of active-region plage
|
We study the dynamical interaction of the solar chromosphere with the
transition region in mossy and non-mossy active-region plage. We carefully
align image sequences taken with the Transition Region And Coronal Explorer
(TRACE) in the ultraviolet passbands around 1550, 1600, and 1700 A and the
extreme ultraviolet passbands at 171 and 195 A. We compute Fourier
phase-difference spectra that are spatially averaged separately over mossy and
non-mossy plage to study temporal modulations as a function of temporal
frequency. The 1550 versus 171 A comparison shows zero phase difference in
non-mossy plage. In mossy plage, the phase differences between all UV and EUV
passbands show pronounced upward trends with increasing frequency, which
abruptly changes into zero phase difference beyond 4-6 mHz. The phase
difference between the 171 and 195 A sequences exhibits a shallow dip below 3
mHz and then also turns to zero phase difference beyond this value. We
attribute the various similarities between the UV and EUV diagnostics that are
evident in the phase-difference diagrams to the contribution of the C IV
resonance lines in the 1550 and 1600 A passbands. The strong upward trend at
the lower frequencies indicates the presence of upward-traveling disturbances.
It points to correspondence between the lower chromosphere and the upper
transition region, perhaps by slow-mode magnetosonic disturbances, or by a
connection between chromospheric and coronal heating mechanisms. The transition
from this upward trend to zero phase difference at higher frequencies is due to
the intermittent obscuration by fibrils that occult the foot points of hot
loops, which are bright in the EUV and C IV lines, in oscillatory manner.
|
astro-ph
|
we study the dynamical interaction of the solar chromosphere with the transition region in mossy and nonmossy activeregion plage we carefully align image sequences taken with the transition region and coronal explorer trace in the ultraviolet passbands around 1550 1600 and 1700 a and the extreme ultraviolet passbands at 171 and 195 a we compute fourier phasedifference spectra that are spatially averaged separately over mossy and nonmossy plage to study temporal modulations as a function of temporal frequency the 1550 versus 171 a comparison shows zero phase difference in nonmossy plage in mossy plage the phase differences between all uv and euv passbands show pronounced upward trends with increasing frequency which abruptly changes into zero phase difference beyond 46 mhz the phase difference between the 171 and 195 a sequences exhibits a shallow dip below 3 mhz and then also turns to zero phase difference beyond this value we attribute the various similarities between the uv and euv diagnostics that are evident in the phasedifference diagrams to the contribution of the c iv resonance lines in the 1550 and 1600 a passbands the strong upward trend at the lower frequencies indicates the presence of upwardtraveling disturbances it points to correspondence between the lower chromosphere and the upper transition region perhaps by slowmode magnetosonic disturbances or by a connection between chromospheric and coronal heating mechanisms the transition from this upward trend to zero phase difference at higher frequencies is due to the intermittent obscuration by fibrils that occult the foot points of hot loops which are bright in the euv and c iv lines in oscillatory manner
|
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|
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|
706.2015
|
Infrared Limit of Gluon Amplitudes at Strong Coupling
|
In this note, we propose that the infrared structure of gluon amplitudes at
strong coupling can be fully extracted from a local consideration near cusps.
This is consistent with field theory and correctly reproduces the infrared
divergences of the four-gluon amplitude at strong coupling calculated recently
by Alday and Maldacena.
|
hep-th
|
in this note we propose that the infrared structure of gluon amplitudes at strong coupling can be fully extracted from a local consideration near cusps this is consistent with field theory and correctly reproduces the infrared divergences of the fourgluon amplitude at strong coupling calculated recently by alday and maldacena
|
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|
[-0.11319926614873112, 0.14967199021950364, -0.16335539933294058, 0.11430057677207514, -0.023654261622577905, -0.07034963528625666, 0.005616230412852019, 0.36210604760795834, -0.20333498097956182, -0.2554868195950985, 0.0046388721815310415, -0.2903074631973868, -0.18922274187207222, 0.09640684711746872, -0.01431660631671548, 0.002589814255479723, 0.006805061493068933, 0.004083915939554572, -0.05613793234806508, -0.18820303241256625, 0.35742767014540733, 0.0673187358235009, 0.2880622341670096, 0.13720563534647226, 0.08490043116733431, 0.05139525714330375, -0.02069995105266571, 0.0628203497454524, -0.11364509834980709, 0.08486831806134433, 0.21590848403051496, -0.001595159452408552, 0.15418582543730736, -0.40784420479089023, -0.21484792567789554, 0.010548018142580986, 0.1585490920394659, 0.14624404070898891, 0.003940182444639504, -0.2675405684299767, 0.08110793717205525, -0.1439649847894907, -0.18050515360198915, -0.1131936732120812, -0.0031346255796961485, -0.07060879617929458, -0.30169530627899804, 0.10566969279199839, -0.04467650555074215, 0.019369890186935662, -0.01735030585899949, -0.07835897201672197, -0.0677644088678062, 0.09232355759479105, 0.09758522724267095, 0.13280517120845617, 0.07130964496172965, -0.20004912528209387, -0.09296091983094812, 0.2669783129123971, -0.13227595747448503, -0.06349365949165076, 0.1631036923918873, -0.20001432069577277, -0.1695915505196899, 0.1857005725428462, 0.08612505270168186, 0.11215160515159368, -0.19202415349078364, 0.20006288032745942, -0.024634484928101302, 0.14400222951895558, 0.13149057179689408, 0.07304546569474041, 0.2834226955100894, 0.07463500367477537, -0.07237020977772772, 0.11666082683717832, -0.07621387301478535, -0.0660027975216508, -0.4017438864707947, -0.010631020748987793, -0.14365085665136576, 0.02727219745516777, -0.09395314341352787, -0.11672908613923937, 0.3482104616379365, 0.13718393563292922, 0.20735238974448295, 0.06604943906888366, 0.29158029429614546, 0.1820668218098581, 0.14119387961924076, 0.10499398958869278, 0.37301998153328897, 0.14098326502135022, 0.09136038705706596, -0.3068444028357044, -0.03222134275361896, 0.12448973961174488]
|
706.2016
|
Observations of Water Masers in the NGC 1333 IRAS 4 Region
|
The NGC 1333 IRAS 4 region was observed in the 22 GHz H2O maser line with an
angular resolution of about 0.08 arcseconds. Two groups of masers were
detected, one near IRAS 4A and the other near BI. Among the eight maser spots
detected near IRAS 4A, six spots are located close to A2, within 100 AU, and
the maser velocities are also near the systemic velocity of the cloud core.
These masers are probably related with the circumstellar disk. Since there is
no maser spot detected around A1, the star forming process is relatively more
active in A2 than in A1. Four maser spots were detected near IRAS 4BI. Since
most of them are distributed along a straight line in the direction of the
outflow, BI masers are most likely related with the jet or outflow. The
disk-outflow dichotomy of H2O masers is discussed briefly. No maser was
detected near H2O(C), another maser source reported previously.
|
astro-ph
|
the ngc 1333 iras 4 region was observed in the 22 ghz h2o maser line with an angular resolution of about 008 arcseconds two groups of masers were detected one near iras 4a and the other near bi among the eight maser spots detected near iras 4a six spots are located close to a2 within 100 au and the maser velocities are also near the systemic velocity of the cloud core these masers are probably related with the circumstellar disk since there is no maser spot detected around a1 the star forming process is relatively more active in a2 than in a1 four maser spots were detected near iras 4bi since most of them are distributed along a straight line in the direction of the outflow bi masers are most likely related with the jet or outflow the diskoutflow dichotomy of h2o masers is discussed briefly no maser was detected near h2oc another maser source reported previously
|
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|
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|
706.2017
|
Twisted Alexander polynomial of links in the projective space
|
We use Reidemeister torsion to study a twisted Alexander polynomial, as
defined by Turaev, for links in the projective space. Using sign-refined
torsion we derive a skein relation for a normalized form of this polynomial.
|
math.GT
|
we use reidemeister torsion to study a twisted alexander polynomial as defined by turaev for links in the projective space using signrefined torsion we derive a skein relation for a normalized form of this polynomial
|
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|
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|
706.2018
|
Space-like and time-like pion-rho transition form factors in the
light-cone formalism
|
Having calculated the light-cone wave function of the pseudoscalar meson by
using two equivalent and fully covariant methods, we generalize such methods to
the valence Fock states of the vector meson in the light-cone formalism. We
investigate the decay constant of the $\rho$ meson $f_{\rho}$, the
$\gamma^{\ast} \pi \to \rho $ and $\gamma^* \rho \to \pi $ transition form
factors and especially the transition magnetic moments. By using two groups of
constraint parameters, we predict the space-like and time-like form factors
$F_{\pi \rho}(Q^2)$ and $F_{\rho \pi}(Q^2)$ at low and moderate energy scale
and the electromagnetic radius of these transition processes. In addition, we
extend our calculation to $\gamma^* \pi \to \omega$ space-like and time-like
form factors by using the same sets of parameters.
|
hep-ph
|
having calculated the lightcone wave function of the pseudoscalar meson by using two equivalent and fully covariant methods we generalize such methods to the valence fock states of the vector meson in the lightcone formalism we investigate the decay constant of the rho meson f_rho the gammaast pi to rho and gamma rho to pi transition form factors and especially the transition magnetic moments by using two groups of constraint parameters we predict the spacelike and timelike form factors f_pi rhoq2 and f_rho piq2 at low and moderate energy scale and the electromagnetic radius of these transition processes in addition we extend our calculation to gamma pi to omega spacelike and timelike form factors by using the same sets of parameters
|
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|
[-0.1234990471197913, 0.2378022249167164, -0.08360380129306577, 0.10188939375414824, -0.05932453585167726, -0.07763330814001772, 0.10446774238437986, 0.3588384606565038, -0.21499947014575202, -0.19867457340781888, -0.039687767958578965, -0.3058013104988883, -0.07575175099967359, 0.09023290101419358, 0.10875216356556242, 0.11836160470653946, 0.0022733876957014825, 0.09289608060304697, -0.12274913882526259, -0.14568770755819666, 0.41565907664286594, -0.03513962456490845, 0.22822772512057174, 0.10161890811868943, 0.04770264671727394, 0.03690120180253871, -0.0063477041180400795, -0.03678701086125026, -0.17467531878889228, 0.08476007599917162, 0.19894379083804475, 0.10202662462640243, 0.15112609115118783, -0.3866072782780975, -0.13878062259755097, 0.09846911876035544, 0.14103755953450067, 0.04748239544375489, 0.06110985984560102, -0.3270199311741938, 0.07630244569542508, -0.15340208346800258, -0.15399549022185965, -0.1522634168698763, 0.02053241044826185, -0.03249329013439516, -0.30252870894037187, 0.09848225696478038, -0.03408322867859776, 0.011041709803976119, -0.08684077654810002, -0.21716657044307794, 0.015141987336877112, 0.10201040057775874, 0.1200858016575997, 0.13438486232965563, 0.1400723352523831, -0.15200315114974122, -0.08132653922463456, 0.38827848286988836, -0.09960705046930039, -0.22604073645779862, 0.08094323625555262, -0.23100877008012807, -0.11323316496564076, 0.1501523266992687, 0.18799122493364848, 0.09649381201403837, -0.12465352755971253, 0.12412528110653512, 0.010766031582534197, 0.11643857937888243, 0.12121640233478198, 0.04532786557780734, 0.11910235253550733, 0.06820373239461333, -0.0750597147930724, 0.08207087375922129, -0.066085010394454, -0.04807413910748437, -0.37544784834608436, -0.1430975685825312, -0.10723441381317873, 0.07635229219098012, -0.1214310652497564, -0.11830321928136982, 0.3567350146457708, 0.012098555934304993, 0.25805893301342925, 0.04723460212893163, 0.28406745693258323, 0.13710871241540493, 0.07805899868447644, 0.1390677930340947, 0.2496563765220344, 0.21611643695893387, 0.05005222795116424, -0.2678792096674442, -0.03320724256336689, 0.05166574096074328]
|
706.2019
|
An operational interpretation for multipartite entanglement
|
We introduce an operational interpretation for pure-state global multipartite
entanglement based on quantum estimation. We show that the estimation of the
strength of low-noise locally depolarizing channels, as quantified by the
regularized quantum Fisher information, is directly related to the
Meyer-Wallach multipartite entanglement measure. Using channels that depolarize
across different partitions, we obtain related multipartite entanglement
measures. We show that this measure is the sum of expectation values of local
observables on two copies of the state.
|
quant-ph
|
we introduce an operational interpretation for purestate global multipartite entanglement based on quantum estimation we show that the estimation of the strength of lownoise locally depolarizing channels as quantified by the regularized quantum fisher information is directly related to the meyerwallach multipartite entanglement measure using channels that depolarize across different partitions we obtain related multipartite entanglement measures we show that this measure is the sum of expectation values of local observables on two copies of the state
|
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|
[-0.1414296163560508, 0.16934369511274144, -0.0957826281317159, 0.06897930512295479, 0.04767272577850849, -0.1641654453978136, 0.03931388747878373, 0.3492857202821012, -0.2555963357248307, -0.22124241536797642, 0.07008151803165674, -0.26787624458552567, -0.12400853740317481, 0.1760891421226325, -0.09498899062345555, 0.11703407558081097, 0.058188595226965845, 0.07912224441669978, -0.08487852547595931, -0.24763508089334257, 0.3650760787581517, 0.012105920336922848, 0.34615085358646785, 0.0880803817236046, 0.12745815957896411, 0.046353377492542, -0.03216973636541274, 0.02530288765835878, -0.18886744808365952, 0.12465491520192523, 0.25441503464229187, 0.23051028681749647, 0.21426082961261272, -0.3491674368088315, -0.20516182017790807, 0.17724850010005877, 0.07617620625472687, 0.1275749777885178, 0.044321233678802655, -0.36406464756212453, 0.0069120780008470085, -0.176539896485432, -0.019824022012944153, -0.1382692004977302, -0.022573504222000575, -0.05696206872635702, -0.29293872151136785, 0.1386447831528721, 0.014729590025161962, 0.045043743061288805, -0.007585967839514087, -0.062326362078356276, 0.003302641176654921, 0.1406037243530638, -0.07487055596248428, -0.039149927110683366, 0.16024723320038287, -0.10549270366197573, -0.1931789577001246, 0.2679010999763941, -0.08061952096131908, -0.24841212643636995, 0.1388972714186537, -0.1353695266759144, -0.12011573565277187, 0.010392083399384827, 0.12686804164346163, 0.09244961568529343, -0.1478933599450952, 0.010482554118354599, -0.09243696249489274, 0.18022473243536888, 0.04080948136843644, 0.20655704980304876, 0.16952164517715573, 0.03409142130623003, 0.1581958204677159, 0.28519077202934145, -0.08210696456969002, -0.15186642334107067, -0.3314488726583394, -0.2084776403067948, -0.2888051991429567, 0.09978702452711084, -0.1338189503921849, -0.13331408840725079, 0.41553848282760614, 0.17076360598787085, 0.1693064598850422, 0.0694238807633368, 0.29377569688798544, 0.1379486113565962, 0.039509894764776544, 0.06329484149214945, 0.22545255431844913, 0.20188193821783673, 0.0016866253640551072, -0.27094093956924103, 0.08766886853770196, 0.046666977425142156]
|
706.202
|
Eigenvalue statistics of the real Ginibre ensemble
|
The real Ginibre ensemble consists of random $N \times N$ matrices formed
from i.i.d. standard Gaussian entries. By using the method of skew orthogonal
polynomials, the general $n$-point correlations for the real eigenvalues, and
for the complex eigenvalues, are given as $n \times n$ Pfaffians with explicit
entries. A computationally tractable formula for the cumulative probability
density of the largest real eigenvalue is presented. This is relevant to May's
stability analysis of biological webs.
|
cond-mat.stat-mech
|
the real ginibre ensemble consists of random n times n matrices formed from iid standard gaussian entries by using the method of skew orthogonal polynomials the general npoint correlations for the real eigenvalues and for the complex eigenvalues are given as n times n pfaffians with explicit entries a computationally tractable formula for the cumulative probability density of the largest real eigenvalue is presented this is relevant to mays stability analysis of biological webs
|
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|
[-0.14239612453289935, 0.1253258564644745, -0.0005515020189655794, 0.0740701283746701, 0.014244224901336271, -0.11061660879341936, -0.003663590328918921, 0.33431274203482914, -0.1925430955189104, -0.20664728346683486, 0.08833382668829448, -0.3154928675991156, -0.22038034271178264, 0.14670275496570645, -0.000600820646394749, 0.12318105886732007, 0.07162452206909153, 0.08925479518822269, -0.07164413649337115, -0.2898177640477976, 0.3120285513231883, 0.011823261571997727, 0.22948514683348303, -0.0482654500425466, 0.09122063336591865, 0.049402630793534824, -0.05098577559692785, -0.05527050860974988, -0.055881391197594034, 0.13445458955735573, 0.2919030484233706, 0.15968171167313247, 0.20637750595405296, -0.39421265340737394, -0.11484643201519912, 0.23589264627898465, 0.17657572737693586, 0.018529958192359756, 0.03256689723128, -0.304648701787448, 0.08230332350610076, -0.1141822065377759, -0.2011605159039735, -0.06551244269704094, 0.10370874956149508, 0.04064513849270706, -0.3835533506966926, 0.1162699406110757, 0.025638985145535018, 0.06014966417255031, 0.03770501325787926, -0.2615778095551414, 0.04711580544559134, 0.10563938287590202, 0.008797921498331267, -0.08093126417716613, 0.10591194365878363, -0.04316595431757034, -0.09770796309552483, 0.33327310651263875, -0.009883939993341227, -0.25122414473318366, 0.07093776944974386, -0.14989773370954837, -0.11562083579750883, 0.1631465701738725, 0.1557835929372625, 0.13101910205708966, -0.12048457541528183, 0.1793888550231271, -0.12307763380483044, 0.12253932262191901, 0.10344871633207879, -0.030853678336260036, 0.1318299493727249, 0.06521196214079454, 0.052327704809392125, 0.1538819266747482, 0.002797242338970505, -0.15281515942911642, -0.2967627575570667, -0.14426943082110705, -0.32852866620177756, 0.1546016338523603, -0.2523205419119394, -0.20997478805381703, 0.38271337755754387, 0.07871760880398387, 0.243377846539826, 0.1596339234289386, 0.2839040993964551, 0.14980561335766185, 0.00699090536029355, 0.049423161912961186, 0.026555574335459922, 0.22269141854328178, 0.037984084526731354, -0.14685886806644802, 0.054791866973942345, 0.10867806579728888]
|
706.2021
|
Structural fingerprinting in the transmission electron microscope:
Overview and opportunities to implement enhanced strategies for nanocrystal
identification
|
This paper illustrates the prospective need for structural fingerprinting
methods for nanocrystals. A review of the existing fingerprinting methods for
crystal structures by means of transmission electron microscopy which work for
a single setting of the specimen goniometer is given. Suggestions are made on
how some of these methods could be enhanced when nanocrystals and novel
instrumentation are involved, i.e. when either the kinematic or quasi-kinematic
scattering approximations are sufficiently well satisfied. A novel strategy for
lattice-fringe fingerprinting of nanocrystals from Fourier transforms of
high-resolution phase contrast transmission electron microscopy images is
briefly outlined. Nanocrystal structure specific limitations to the application
of this strategy are discussed. An appeal is made to share the structural data
of nanocrystals freely over the internet and infrastructure that would allow
this sharing is mentioned. A shorter version of this paper has been accepted
for publication in a special issue on the Structure of Nanocrystals of the
Zeitschrift fuer Kristallographie, International journal for structural,
physical, and chemical aspects of crystalline materials.
|
cond-mat.mtrl-sci
|
this paper illustrates the prospective need for structural fingerprinting methods for nanocrystals a review of the existing fingerprinting methods for crystal structures by means of transmission electron microscopy which work for a single setting of the specimen goniometer is given suggestions are made on how some of these methods could be enhanced when nanocrystals and novel instrumentation are involved ie when either the kinematic or quasikinematic scattering approximations are sufficiently well satisfied a novel strategy for latticefringe fingerprinting of nanocrystals from fourier transforms of highresolution phase contrast transmission electron microscopy images is briefly outlined nanocrystal structure specific limitations to the application of this strategy are discussed an appeal is made to share the structural data of nanocrystals freely over the internet and infrastructure that would allow this sharing is mentioned a shorter version of this paper has been accepted for publication in a special issue on the structure of nanocrystals of the zeitschrift fuer kristallographie international journal for structural physical and chemical aspects of crystalline materials
|
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|
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|
706.2022
|
The Unusual Spectrum of Comet 96P/Machholz
|
We report spectra from 3000-5900 A for comet 96P/Machholz, obtained on 2007
Apr 27 UT with the 3-m Shane telescope at Lick Observatory. The spectra are
extremely carbon poor, and show a prominent NH_2 series, but no CN emission.
NH, NH_2, and C_2 gas production rates are (8.36 +/- 2.18)x10^25, (29.88 +/-
3.66)x10^25, and (4.52 +/- 0.61)x10^23 molecules sec^-1, respectively, as
determined from Haser model fits to the data. Upper limits to the gas
production rates for CN and C_3 are 7.5x10^22 and 2.0x10^23, respectively.
Though 96P is depleted in C_2 and C_3 relative to NH, it is even more depleted
in CN than other so-called "carbon-chain depleted" comets.
|
astro-ph
|
we report spectra from 30005900 a for comet 96pmachholz obtained on 2007 apr 27 ut with the 3m shane telescope at lick observatory the spectra are extremely carbon poor and show a prominent nh_2 series but no cn emission nh nh_2 and c_2 gas production rates are 836 218x1025 2988 366x1025 and 452 061x1023 molecules sec1 respectively as determined from haser model fits to the data upper limits to the gas production rates for cn and c_3 are 75x1022 and 20x1023 respectively though 96p is depleted in c_2 and c_3 relative to nh it is even more depleted in cn than other socalled carbonchain depleted comets
|
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|
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|
706.2023
|
Electric fields in plasmas under pulsed currents
|
Electric fields in a plasma that conducts a high-current pulse are measured
as a function of time and space. The experiment is performed using a coaxial
configuration, in which a current rising to 160 kA in 100 ns is conducted
through a plasma that prefills the region between two coaxial electrodes. The
electric field is determined using laser spectroscopy and line-shape analysis.
Plasma doping allows for 3D spatially resolved measurements. The measured peak
magnitude and propagation velocity of the electric field is found to match
those of the Hall electric field, inferred from the magnetic-field front
propagation measured previously.
|
physics.plasm-ph
|
electric fields in a plasma that conducts a highcurrent pulse are measured as a function of time and space the experiment is performed using a coaxial configuration in which a current rising to 160 ka in 100 ns is conducted through a plasma that prefills the region between two coaxial electrodes the electric field is determined using laser spectroscopy and lineshape analysis plasma doping allows for 3d spatially resolved measurements the measured peak magnitude and propagation velocity of the electric field is found to match those of the hall electric field inferred from the magneticfield front propagation measured previously
|
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|
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|
706.2024
|
Generation interval contraction and epidemic data analysis
|
The generation interval is the time between the infection time of an infected
person and the infection time of his or her infector. Probability density
functions for generation intervals have been an important input for epidemic
models and epidemic data analysis. In this paper, we specify a general
stochastic SIR epidemic model and prove that the mean generation interval
decreases when susceptible persons are at risk of infectious contact from
multiple sources. The intuition behind this is that when a susceptible person
has multiple potential infectors, there is a ``race'' to infect him or her in
which only the first infectious contact leads to infection. In an epidemic, the
mean generation interval contracts as the prevalence of infection increases. We
call this global competition among potential infectors. When there is rapid
transmission within clusters of contacts, generation interval contraction can
be caused by a high local prevalence of infection even when the global
prevalence is low. We call this local competition among potential infectors.
Using simulations, we illustrate both types of competition.
Finally, we show that hazards of infectious contact can be used instead of
generation intervals to estimate the time course of the effective reproductive
number in an epidemic. This approach leads naturally to partial likelihoods for
epidemic data that are very similar to those that arise in survival analysis,
opening a promising avenue of methodological research in infectious disease
epidemiology.
|
q-bio.QM math.PR stat.AP
|
the generation interval is the time between the infection time of an infected person and the infection time of his or her infector probability density functions for generation intervals have been an important input for epidemic models and epidemic data analysis in this paper we specify a general stochastic sir epidemic model and prove that the mean generation interval decreases when susceptible persons are at risk of infectious contact from multiple sources the intuition behind this is that when a susceptible person has multiple potential infectors there is a race to infect him or her in which only the first infectious contact leads to infection in an epidemic the mean generation interval contracts as the prevalence of infection increases we call this global competition among potential infectors when there is rapid transmission within clusters of contacts generation interval contraction can be caused by a high local prevalence of infection even when the global prevalence is low we call this local competition among potential infectors using simulations we illustrate both types of competition finally we show that hazards of infectious contact can be used instead of generation intervals to estimate the time course of the effective reproductive number in an epidemic this approach leads naturally to partial likelihoods for epidemic data that are very similar to those that arise in survival analysis opening a promising avenue of methodological research in infectious disease epidemiology
|
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|
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|
706.2025
|
On the Performance Evaluation of Encounter-based Worm Interactions Based
on Node Characteristics
|
An encounter-based network is a frequently disconnected wireless ad-hoc
network requiring nearby neighbors to store and forward data utilizing mobility
and encounters over time. Using traditional approaches such as gateways or
firewalls for deterring worm propagation in encounter-based networks is
inappropriate. Because this type of network is highly dynamic and has no
specific boundary, a distributed counter-worm mechanism is needed. We propose
models for the worm interaction approach that relies upon automated beneficial
worm generation to alleviate problems of worm propagation in such networks. We
study and analyze the impact of key mobile node characteristics including node
cooperation, immunization, on-off behavior on the worm propagations and
interactions. We validate our proposed model using extensive simulations. We
also find that, in addition to immunization, cooperation can reduce the level
of worm infection. Furthermore, on-off behavior linearly impacts only timing
aspect but not the overall infection. Using realistic mobile network
measurements, we find that encounters are non-uniform, the trends are
consistent with the model but the magnitudes are drastically different.
Immunization seems to be the most effective in such scenarios. These findings
provide insight that we hope would aid to develop counter-worm protocols in
future encounter-based networks.
|
cs.CR cs.NI
|
an encounterbased network is a frequently disconnected wireless adhoc network requiring nearby neighbors to store and forward data utilizing mobility and encounters over time using traditional approaches such as gateways or firewalls for deterring worm propagation in encounterbased networks is inappropriate because this type of network is highly dynamic and has no specific boundary a distributed counterworm mechanism is needed we propose models for the worm interaction approach that relies upon automated beneficial worm generation to alleviate problems of worm propagation in such networks we study and analyze the impact of key mobile node characteristics including node cooperation immunization onoff behavior on the worm propagations and interactions we validate our proposed model using extensive simulations we also find that in addition to immunization cooperation can reduce the level of worm infection furthermore onoff behavior linearly impacts only timing aspect but not the overall infection using realistic mobile network measurements we find that encounters are nonuniform the trends are consistent with the model but the magnitudes are drastically different immunization seems to be the most effective in such scenarios these findings provide insight that we hope would aid to develop counterworm protocols in future encounterbased networks
|
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|
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|
706.2026
|
Quantum Teichm\"uller spaces and Kashaev's 6j-symbols
|
The Kashaev invariants of 3-manifolds are based on $6j$-symbols from the
representation theory of the Weyl algebra, a Hopf algebra corresponding to the
Borel subalgebra of $U_q(sl(2,\C))$. In this paper, we show that Kashaev's
$6j$-symbols are intertwining operators of local representations of quantum
Teichm\"uller spaces. This relates Kashaev's work with the theory of quantum
Teichm\"uller space, which was developed by Chekhov-Fock, Kashaev and continued
by Bonahon-Liu.
|
math.GT math.QA
|
the kashaev invariants of 3manifolds are based on 6jsymbols from the representation theory of the weyl algebra a hopf algebra corresponding to the borel subalgebra of u_qsl2c in this paper we show that kashaevs 6jsymbols are intertwining operators of local representations of quantum teichmuller spaces this relates kashaevs work with the theory of quantum teichmuller space which was developed by chekhovfock kashaev and continued by bonahonliu
|
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|
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|
706.2027
|
Collective behavior in a granular jet: Emergence of a liquid with zero
surface-tension
|
We perform the analog to the "water bell" experiment using non-cohesive
granular material. When a jet of granular material, many particles wide,
rebounds from a fixed cylindrical target, it deforms into a sharply-defined
sheet or cone with a shape that mimics a liquid with zero surface tension. The
particulate nature of granular material becomes apparent when the number of
particles in the cross-section of the jet is decreased and the emerging sheets
and cones broaden and gradually disintegrate into a broad spray. This
experiment has its counterpart in the behavior of the quark-gluon plasma
generated by collisions of gold ions at the Relativistic Heavy Ion Collider.
There a high density of inter-particle collisions gives rise to collective
behavior that has also been described as a liquid.
|
cond-mat.soft
|
we perform the analog to the water bell experiment using noncohesive granular material when a jet of granular material many particles wide rebounds from a fixed cylindrical target it deforms into a sharplydefined sheet or cone with a shape that mimics a liquid with zero surface tension the particulate nature of granular material becomes apparent when the number of particles in the crosssection of the jet is decreased and the emerging sheets and cones broaden and gradually disintegrate into a broad spray this experiment has its counterpart in the behavior of the quarkgluon plasma generated by collisions of gold ions at the relativistic heavy ion collider there a high density of interparticle collisions gives rise to collective behavior that has also been described as a liquid
|
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|
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|
706.2028
|
Eigenvalues and lambda constants on Riemannian submersions
|
Given a Riemannian submersion, we study the relation between lambda constants
introduced by G.Perelman on the base manifold and the total space of a
Riemannian submersion. We also discuss the relationship between the first
eigenvalues of Laplacians on the base manifold and that of the total space. The
quantities on warped products are discussed in detail.
|
math.DG math.AP
|
given a riemannian submersion we study the relation between lambda constants introduced by gperelman on the base manifold and the total space of a riemannian submersion we also discuss the relationship between the first eigenvalues of laplacians on the base manifold and that of the total space the quantities on warped products are discussed in detail
|
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|
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|
706.2029
|
The Chemical Compositions of the Type II Cepheids -- The BL Her and W
Vir Variables
|
Abundance analyses from high-resolution optical spectra are presented for 19
Type II Cepheids in the Galactic field. The sample includes both short-period
(BL Her) and long-period (W Vir) stars. This is the first extensive abundance
analysis of these variables. The C, N, and O abundances with similar spreads
for the BL Her and W Vir show evidence for an atmosphere contaminated with
$3\alpha$-process and CN-cycling products. A notable anomaly of the BL Her
stars is an overabundance of Na by a factor of about five relative to their
presumed initial abundances. This overabundance is not seen in the W Vir stars.
The abundance anomalies running from mild to extreme in W Vir stars but not
seen in the BL Her stars are attributed to dust-gas separation that provides an
atmosphere deficient in elements of high condensation temperature, notably Al,
Ca, Sc, Ti, and $s$-process elements. Such anomalies have previously been seen
among RV Tau stars which represent a long-period extension of the variability
enjoyed by the Type II Cepheids. Comments are offered on how the contrasting
abundance anomalies of BL Her and W Vir stars may be explained in terms of the
stars' evolution from the blue horizontal branch.
|
astro-ph
|
abundance analyses from highresolution optical spectra are presented for 19 type ii cepheids in the galactic field the sample includes both shortperiod bl her and longperiod w vir stars this is the first extensive abundance analysis of these variables the c n and o abundances with similar spreads for the bl her and w vir show evidence for an atmosphere contaminated with 3alphaprocess and cncycling products a notable anomaly of the bl her stars is an overabundance of na by a factor of about five relative to their presumed initial abundances this overabundance is not seen in the w vir stars the abundance anomalies running from mild to extreme in w vir stars but not seen in the bl her stars are attributed to dustgas separation that provides an atmosphere deficient in elements of high condensation temperature notably al ca sc ti and sprocess elements such anomalies have previously been seen among rv tau stars which represent a longperiod extension of the variability enjoyed by the type ii cepheids comments are offered on how the contrasting abundance anomalies of bl her and w vir stars may be explained in terms of the stars evolution from the blue horizontal branch
|
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|
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|
706.203
|
Hot Topics from the BABAR Experiment
|
With a sample of about 384 million BBbar pairs recorded with the BABAR
detector, we search for the flavor-changing charged current transition B+ ->
\tau\nu and perform an amplitude analysis of the effective flavor-changing
neutral current transition B+ -> \phi(1020)K*(892)+. We also extend our search
for other K* final states in the decay B0 -> phi(1020)K*0 with a large K*0 ->
K+pi- invariant mass. Two samples of events with one reconstructed hadronic B
decay or one reconstructed semileptonic B decay are selected, and in the recoil
a search for B+ -> \tau\nu is performed. We find a 2.6 sigma (3.2 sigma not
including expected background uncertainty) excess in data which can be
converted to a preliminary branching fraction central value of BR(B+ -> \tau\nu
) = (1.20 +0.40-0.38 +0.29-0.30 +-0.22) 10^-4. With the decay B+- ->
\phi(1020)K*(892)+-, twelve parameters are measured, where our measurements of
f_L=0.49+-0.05+-0.03, f_perp=0.21+-0.05+-0.02, and the strong phases point to
the presence of a substantial helicity-plus amplitude from a presently unknown
source.
|
hep-ex
|
with a sample of about 384 million bbbar pairs recorded with the babar detector we search for the flavorchanging charged current transition b taunu and perform an amplitude analysis of the effective flavorchanging neutral current transition b phi1020k892 we also extend our search for other k final states in the decay b0 phi1020k0 with a large k0 kpi invariant mass two samples of events with one reconstructed hadronic b decay or one reconstructed semileptonic b decay are selected and in the recoil a search for b taunu is performed we find a 26 sigma 32 sigma not including expected background uncertainty excess in data which can be converted to a preliminary branching fraction central value of brb taunu 120 040038 029030 022 104 with the decay b phi1020k892 twelve parameters are measured where our measurements of f_l049005003 f_perp021005002 and the strong phases point to the presence of a substantial helicityplus amplitude from a presently unknown source
|
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|
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|
706.2031
|
Relativity tests by complementary rotating Michelson-Morley experiments
|
We report Relativity tests based on data from two simultaneous
Michelson-Morley experiments, spanning a period of more than one year. Both
were actively rotated on turntables. One (in Berlin, Germany) uses optical
Fabry-Perot resonators made of fused silica; the other (in Perth, Australia)
uses microwave whispering-gallery sapphire resonators. Within the standard
model extension, we obtain simultaneous limits on Lorentz violation for
electrons (5 coefficients) and photons (8) at levels down to $10^{-16}$,
improved by factors between 3 and 50 compared to previous work.
|
physics.class-ph gr-qc hep-ph physics.hist-ph
|
we report relativity tests based on data from two simultaneous michelsonmorley experiments spanning a period of more than one year both were actively rotated on turntables one in berlin germany uses optical fabryperot resonators made of fused silica the other in perth australia uses microwave whisperinggallery sapphire resonators within the standard model extension we obtain simultaneous limits on lorentz violation for electrons 5 coefficients and photons 8 at levels down to 1016 improved by factors between 3 and 50 compared to previous work
|
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|
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|
706.2032
|
Heegaard Floer homology and fibred 3--manifolds
|
Given a closed 3--manifold $Y$, we show that the Heegaard Floer homology
determines whether $Y$ fibres over the circle with a fibre of negative Euler
characteristic. This is an analogue of an earlier result about knots proved by
Ghiggini and the author.
|
math.GT
|
given a closed 3manifold y we show that the heegaard floer homology determines whether y fibres over the circle with a fibre of negative euler characteristic this is an analogue of an earlier result about knots proved by ghiggini and the author
|
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|
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|
706.2033
|
Power Allocation for Discrete-Input Delay-Limited Fading Channels
|
We consider power allocation algorithms for fixed-rate transmission over
Nakagami-m non-ergodic block-fading channels with perfect transmitter and
receiver channel state information and discrete input signal constellations,
under both short- and long-term power constraints. Optimal power allocation
schemes are shown to be direct applications of previous results in the
literature. We show that the SNR exponent of the optimal short-term scheme is
given by m times the Singleton bound. We also illustrate the significant gains
available by employing long-term power constraints. In particular, we analyze
the optimal long-term solution, showing that zero outage can be achieved
provided that the corresponding short-term SNR exponent with the same system
parameters is strictly greater than one. Conversely, if the short-term SNR
exponent is smaller than one, we show that zero outage cannot be achieved. In
this case, we derive the corresponding long-term SNR exponent as a function of
the Singleton bound. Due to the nature of the expressions involved, the
complexity of optimal schemes may be prohibitive for system implementation. We
therefore propose simple sub-optimal power allocation schemes whose outage
probability performance is very close to the minimum outage probability
obtained by optimal schemes. We also show the applicability of these techniques
to practical systems employing orthogonal frequency division multiplexing.
|
cs.IT math.IT
|
we consider power allocation algorithms for fixedrate transmission over nakagamim nonergodic blockfading channels with perfect transmitter and receiver channel state information and discrete input signal constellations under both short and longterm power constraints optimal power allocation schemes are shown to be direct applications of previous results in the literature we show that the snr exponent of the optimal shortterm scheme is given by m times the singleton bound we also illustrate the significant gains available by employing longterm power constraints in particular we analyze the optimal longterm solution showing that zero outage can be achieved provided that the corresponding shortterm snr exponent with the same system parameters is strictly greater than one conversely if the shortterm snr exponent is smaller than one we show that zero outage cannot be achieved in this case we derive the corresponding longterm snr exponent as a function of the singleton bound due to the nature of the expressions involved the complexity of optimal schemes may be prohibitive for system implementation we therefore propose simple suboptimal power allocation schemes whose outage probability performance is very close to the minimum outage probability obtained by optimal schemes we also show the applicability of these techniques to practical systems employing orthogonal frequency division multiplexing
|
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|
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|
706.2034
|
Properties of positive solutions of an Elliptic Equation with negative
exponents
|
In this paper, we study the existence and non-existence result of positive
solutions to a singular elliptic equation with negative power on the bounded
smooth domain or in the whole Euclidean space. Our model arises in the study of
the steady states of thin films and other applied physics. We can get some
useful local gradient estimate and L1 lower bound for positive solutions of the
elliptic equation. A uniform positive lower bound for convex positive solutions
is also obtained. We show that in lower dimensions, there is no stable positive
solutions in the whole space. In the whole space of dimension two, we can show
that there is no positive smooth solution with finite Morse index. Symmetry
properties of related integral equations are also given.
|
math.AP math.DG
|
in this paper we study the existence and nonexistence result of positive solutions to a singular elliptic equation with negative power on the bounded smooth domain or in the whole euclidean space our model arises in the study of the steady states of thin films and other applied physics we can get some useful local gradient estimate and l1 lower bound for positive solutions of the elliptic equation a uniform positive lower bound for convex positive solutions is also obtained we show that in lower dimensions there is no stable positive solutions in the whole space in the whole space of dimension two we can show that there is no positive smooth solution with finite morse index symmetry properties of related integral equations are also given
|
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|
[-0.15413698731433778, 0.10450061592125585, -0.0891544211873903, 0.08062735766298064, -0.07848690733653567, -0.13970312017149158, -0.002897694565555347, 0.32170585494133686, -0.26511983376824194, -0.22998934594123432, 0.1345272368016017, -0.29647272888068404, -0.14813575002277965, 0.212054310813694, -0.06154773022151656, 0.059107169619805756, 0.03158955165879831, 0.05591573153755495, -0.10628954544737344, -0.24774360278850452, 0.3851804317433446, -0.0878712279566874, 0.23202950189570112, 0.10119174881320861, 0.09578198375224713, -0.06584862916867086, 0.02085149968560371, 0.05498306960581676, -0.203300685682662, 0.12976535359565686, 0.25841663159533507, 0.09380272822269785, 0.2670511564993787, -0.3942656949724233, -0.2119869625210644, 0.18859723002265488, 0.1462843673200243, 0.08246068780620892, -0.11200523800364444, -0.241162192312971, 0.13683783568974053, -0.0891908311011595, -0.19222890412331456, -0.080796260083656, 0.026473130173389873, 0.024972988266704813, -0.2653680137743885, 0.1013766598868339, 0.1071888633356023, 0.03286591881797427, -0.1872859034310317, -0.11791093585022266, -0.047717415640825434, 0.09365960971234248, 0.06042836893198361, 0.039123302464196014, 0.015711248919759536, -0.11789514550325712, -0.08184520633418173, 0.3023066459397327, -0.13345091207514678, -0.2883108429303984, 0.1742062045128218, -0.1827904508534139, -0.09365443591516287, 0.12884568129222662, 0.1777069102085772, 0.1810172313513855, -0.050638848405686165, 0.15197650598415677, -0.10498529977519952, 0.1732681602062214, 0.09413766035706633, -0.00619829342781847, 0.10569612564341653, 0.0883264261009615, 0.19469984295955373, 0.16506549037506965, 0.006217971466304291, -0.11168749463774028, -0.34962671666243483, -0.1692833193727503, -0.18142600237791026, 0.09521540931411206, -0.13045977008316964, -0.2009090166095467, 0.3735419000935046, 0.06342875176212853, 0.1890156583949214, 0.060293355439272195, 0.23711223916579333, 0.17207631395320364, -0.008720804560219958, 0.09942561881394968, 0.20903680451137627, 0.10677561933906483, 0.08421544061194355, -0.18583269766531885, 0.03909343574935245, 0.11024782044241585]
|
706.2035
|
Critique of Feinstein's Proof that P is not Equal to NP
|
We examine a proof by Craig Alan Feinstein that P is not equal to NP. We
present counterexamples to claims made in his paper and expose a flaw in the
methodology he uses to make his assertions. The fault in his argument is the
incorrect use of reduction. Feinstein makes incorrect assumptions about the
complexity of a problem based on the fact that there is a more complex problem
that can be used to solve it. His paper introduces the terminology "imaginary
processor" to describe how it is possible to beat the brute force reduction he
offers to solve the Subset-Sum problem. The claims made in the paper would not
be validly established even were imaginary processors to exist.
|
cs.CC
|
we examine a proof by craig alan feinstein that p is not equal to np we present counterexamples to claims made in his paper and expose a flaw in the methodology he uses to make his assertions the fault in his argument is the incorrect use of reduction feinstein makes incorrect assumptions about the complexity of a problem based on the fact that there is a more complex problem that can be used to solve it his paper introduces the terminology imaginary processor to describe how it is possible to beat the brute force reduction he offers to solve the subsetsum problem the claims made in the paper would not be validly established even were imaginary processors to exist
|
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|
[-0.10870103232323841, 0.013175191075987174, -0.1512330104636044, 0.10048616487345025, -0.17533587809933834, -0.19234119012889242, 0.09358682854496286, 0.33707859288869785, -0.2564356459946442, -0.31184444285365714, 0.08956394654878673, -0.26173641078737603, -0.17751269600502834, 0.18404094634593285, -0.18606945286121437, 0.02155585034492136, 0.04468549077656852, 0.004089416576032879, 0.0017314171609312233, -0.35107828414521547, 0.2881865068143155, 0.04118472298591578, 0.21465077328675686, 0.09862045914779942, 0.061578589045450466, 0.019366861602776692, -0.03423608692378557, -0.014245276085977606, -0.10308220853510326, 0.13464802740623064, 0.29027596163806046, 0.20140716541135886, 0.324286137496223, -0.44847974819796427, -0.13853083413188197, 0.1379173198840072, 0.10378222856201044, 0.1533121541523993, 0.03066328886009561, -0.2137658230788192, 0.1193894888743946, -0.1497898641582422, -0.15550462626499914, -0.06638760923431451, 0.059617361918623955, -0.06723143263649539, -0.20040836831664338, 0.0026357401037166097, 0.11700491757452988, 0.03526948799355691, 0.002080173394055802, -0.09303122311204422, 0.10292622085832873, 0.07580476490185917, 0.08002514186698724, 0.051871032058848306, 0.08492847882649478, -0.04072733013695028, -0.14458242885204925, 0.39245643080094783, -0.006380554046012273, -0.22206711235941395, 0.16938353451399304, -0.04968221133238315, -0.13950467634038263, 0.0896061646024219, 0.0943658100988935, 0.0908256821303057, -0.12203349763950129, 0.10214822544049111, -0.06651216661635817, 0.21564963585971034, 0.12989298298665392, -0.07603307285134782, 0.11983244764391615, 0.08642364378642886, 0.0493785476922488, 0.13082911983374976, 0.007649184245725765, -0.0767184477069556, -0.27652749359732914, -0.1834820295535341, -0.20049478494202203, 0.07542169542162397, 0.04670945390241569, -0.15141931731457345, 0.3145761351187189, 0.24967441115794436, 0.14126551683459962, 0.042596612008241545, 0.2939671502769494, 0.10589217873164962, 0.0548998729018651, 0.07397745696812116, 0.25522624027422247, 0.11723229039789122, 0.13384414918157234, -0.1619424333188393, 0.12430161303457092, 0.07727237103287787]
|
706.2036
|
Observation of back-action cancellation in interferometric and weak
force measurements
|
We experimentally demonstrate a cancellation of back-action noise in optical
measurements. Back-action cancellation was first proposed within the framework
of gravitational-wave detection by dual resonators as a way to drastically
improve their sensitivity. We have developed an experiment based on a
high-finesse Fabry-Perot cavity to study radiation-pressure effects in
ultra-sensitive displacement measurements. Using an intensity-modulated
intracavity field to mimic the quantum radiation-pressure noise, we report the
first observation of back-action cancellation due to a destructive interference
between radiation-pressure effects on both mirrors of the cavity. We have
observed a sensitivity improvement by a factor larger than 20 both in
displacement and weak force measurements.
|
quant-ph gr-qc
|
we experimentally demonstrate a cancellation of backaction noise in optical measurements backaction cancellation was first proposed within the framework of gravitationalwave detection by dual resonators as a way to drastically improve their sensitivity we have developed an experiment based on a highfinesse fabryperot cavity to study radiationpressure effects in ultrasensitive displacement measurements using an intensitymodulated intracavity field to mimic the quantum radiationpressure noise we report the first observation of backaction cancellation due to a destructive interference between radiationpressure effects on both mirrors of the cavity we have observed a sensitivity improvement by a factor larger than 20 both in displacement and weak force measurements
|
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|
[-0.17078770458017692, 0.15605978537244553, -0.07070471360706367, -0.027474620701888434, -0.04394731684946097, -0.12682509671699685, 0.06824253693831941, 0.4086021192980787, -0.19752937112487137, -0.32637342944060665, 0.03023599480534008, -0.26387414959474254, -0.18124652437220973, 0.24128023432925916, -0.07698014737420286, 0.052035526188914306, 0.05206941987405746, -0.0546026312356564, -0.02335283202298272, -0.1679547701451856, 0.25257593156801217, 0.14464340993324115, 0.3199891911891217, 0.04684689777115217, 0.1551206525451002, -0.014930483222437592, 0.00353421299951151, 0.009399459858496603, -0.10325166837831673, 0.042454441143210994, 0.19186731631634757, 0.005495718625472643, 0.2830998880717044, -0.4633908405040319, -0.19455296462939048, 0.08546755427960306, 0.12688107639013863, 0.17486165592876765, -0.09934453295696025, -0.35346811973991304, 0.008042822349055383, -0.16035969171207398, -0.04976211454639339, -0.06606118142819749, -0.04886606500748222, -0.020787931291404396, -0.2834024545647061, 0.04832368921667624, 0.044300278243519224, 0.07921696431003511, -0.021754243634999372, -0.008542189808884779, 0.10412912690438904, 0.056389568449678615, -0.048785460683015675, 0.010261008849528689, 0.2311046868473148, -0.14366185369390921, -0.17191081389207213, 0.34279842050566983, -0.16247288350650008, -0.14608070480887994, 0.12937342210072808, -0.1790146905516919, -0.0071221966511355, 0.15719088575301263, 0.19080548228409427, 0.06499125963847081, -0.1627173336634699, -0.025085558063158084, 0.05654006091376337, 0.22126055627058333, 0.10996316607298258, 0.13723000961964807, 0.19369459486244103, 0.1885791843305924, 0.054132215289148286, 0.1735748213966592, -0.18083451857987362, -0.010083841142029716, -0.2917601436806413, -0.09713723211909663, -0.15116952961454025, 0.07756132844951935, -0.038956016342266454, -0.08737371155383208, 0.33103222348906386, 0.19359380663193476, 0.1712445034936536, -0.023372532533427987, 0.405128066893667, 0.12483106091923009, 0.10594259653589688, -0.060771153026367895, 0.4326025955379009, 0.22364007807426298, 0.05495093725116581, -0.340651088262138, -0.014220123859838797, -0.02183283010582762]
|
706.2037
|
Phase structure of a spherical surface model on fixed connectivity
meshes
|
An elastic surface model is investigated by using the canonical Monte Carlo
simulation technique on triangulated spherical meshes. The model undergoes a
first-order collapsing transition and a continuous surface fluctuation
transition. The shape of surfaces is maintained by a one-dimensional bending
energy, which is defined on the mesh, and no two-dimensional bending energy is
included in the Hamiltonian.
|
cond-mat.stat-mech cond-mat.soft
|
an elastic surface model is investigated by using the canonical monte carlo simulation technique on triangulated spherical meshes the model undergoes a firstorder collapsing transition and a continuous surface fluctuation transition the shape of surfaces is maintained by a onedimensional bending energy which is defined on the mesh and no twodimensional bending energy is included in the hamiltonian
|
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|
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|
706.2038
|
The first-passage area for drifted Brownian motion and the moments of
the Airy distribution
|
An exact expression for the distribution of the area swept out by a drifted
Brownian motion till its first-passage time is derived. A study of the
asymptotic behaviour confirms earlier conjectures and clarifies their range of
validity. The analysis also leads to a simple closed-form solution for the
moments of the Airy distribution.
|
cond-mat.stat-mech math.CO math.PR
|
an exact expression for the distribution of the area swept out by a drifted brownian motion till its firstpassage time is derived a study of the asymptotic behaviour confirms earlier conjectures and clarifies their range of validity the analysis also leads to a simple closedform solution for the moments of the airy distribution
|
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|
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|
706.2039
|
Oscillatory secular modes: The thermal micropulses
|
Stars in the narrow mass range of about 2.5 and 3.5 solar masses can develop
a thermally unstable He-burning shell during its ignition phase. We study, from
the point of view secular stability theory, these so called thermal micropulses
and we investigate their properties; the thermal pulses constitute a convenient
conceptual laboratory to look thoroughly into the physical properties of a
helium-burning shell during the whole thermally pulsing episode. Linear
stability analyses were performed on a large number of 3 solar-mass star models
at around the end of their core helium-burning and the beginning of the
double-shell burning phase. The stellar models were not assumed to be in
thermal equilibrium. The thermal mircopulses, and we conjecture all other
thermal pulse episodes encountered by shell-burning stars, can be understood as
the nonlinear finite-amplitude realization of an oscillatory secular
instability that prevails during the whole thermal pulsing episode. Hence, the
cyclic nature of the thermal pulses can be traced back to a linear instability
concept.
|
astro-ph
|
stars in the narrow mass range of about 25 and 35 solar masses can develop a thermally unstable heburning shell during its ignition phase we study from the point of view secular stability theory these so called thermal micropulses and we investigate their properties the thermal pulses constitute a convenient conceptual laboratory to look thoroughly into the physical properties of a heliumburning shell during the whole thermally pulsing episode linear stability analyses were performed on a large number of 3 solarmass star models at around the end of their core heliumburning and the beginning of the doubleshell burning phase the stellar models were not assumed to be in thermal equilibrium the thermal mircopulses and we conjecture all other thermal pulse episodes encountered by shellburning stars can be understood as the nonlinear finiteamplitude realization of an oscillatory secular instability that prevails during the whole thermal pulsing episode hence the cyclic nature of the thermal pulses can be traced back to a linear instability concept
|
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|
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|
706.204
|
Getting started in probabilistic graphical models
|
Probabilistic graphical models (PGMs) have become a popular tool for
computational analysis of biological data in a variety of domains. But, what
exactly are they and how do they work? How can we use PGMs to discover patterns
that are biologically relevant? And to what extent can PGMs help us formulate
new hypotheses that are testable at the bench? This note sketches out some
answers and illustrates the main ideas behind the statistical approach to
biological pattern discovery.
|
q-bio.QM cs.LG physics.soc-ph stat.ME stat.ML
|
probabilistic graphical models pgms have become a popular tool for computational analysis of biological data in a variety of domains but what exactly are they and how do they work how can we use pgms to discover patterns that are biologically relevant and to what extent can pgms help us formulate new hypotheses that are testable at the bench this note sketches out some answers and illustrates the main ideas behind the statistical approach to biological pattern discovery
|
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|
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|
706.2041
|
Disappearing cosmological constant in f(R) gravity
|
For higher-derivative f(R) gravity where R is the Ricci scalar, a class of
models is proposed which produce viable cosmology different from the LambdaCDM
one at recent times and satisfy cosmological, Solar system and laboratory
tests. These models have both flat and de Sitter space-times as particular
solutions in the absence of matter. Thus, a cosmological constant is zero in
flat space-time, but appears effectively in a curved one for sufficiently large
R. A 'smoking gun' for these models would be small discrepancy in values of the
slope of the primordial perturbation power spectrum determined from galaxy
surveys and CMB fluctuations. On the other hand, a new problem for dark energy
models based on f(R) gravity is pointed which is connected with possible
overproduction of new massive scalar particles (scalarons) arising in this
theory in the very early Universe.
|
astro-ph gr-qc hep-th
|
for higherderivative fr gravity where r is the ricci scalar a class of models is proposed which produce viable cosmology different from the lambdacdm one at recent times and satisfy cosmological solar system and laboratory tests these models have both flat and de sitter spacetimes as particular solutions in the absence of matter thus a cosmological constant is zero in flat spacetime but appears effectively in a curved one for sufficiently large r a smoking gun for these models would be small discrepancy in values of the slope of the primordial perturbation power spectrum determined from galaxy surveys and cmb fluctuations on the other hand a new problem for dark energy models based on fr gravity is pointed which is connected with possible overproduction of new massive scalar particles scalarons arising in this theory in the very early universe
|
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|
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|
706.2042
|
1/4-BPS M-theory bubbles with SO(3) x SO(4) symmetry
|
In this paper we generalize the work of Lin, Lunin and Maldacena on the
classification of 1/2-BPS M-theory solutions to a specific class of 1/4-BPS
configurations. We are interested in the solutions of 11 dimensional
supergravity with $SO(3)\times SO(4)$ symmetry, and it is shown that such
solutions are constructed over a one-parameter familiy of 4 dimensional almost
Calabi-Yau spaces. Through analytic continuations we can obtain M-theory
solutions having $AdS_2\times S^3$ or $AdS_3\times S^2$ factors. It is shown
that our result is equivalent to the $AdS$ solutions which have been recently
reported as the near-horizon geometry of M2 or M5-branes wrapped on 2 or
4-cycles in Calabi-Yau threefolds. We also discuss the hierarchy of M-theory
bubbles with different number of supersymmetries.
|
hep-th
|
in this paper we generalize the work of lin lunin and maldacena on the classification of 12bps mtheory solutions to a specific class of 14bps configurations we are interested in the solutions of 11 dimensional supergravity with so3times so4 symmetry and it is shown that such solutions are constructed over a oneparameter familiy of 4 dimensional almost calabiyau spaces through analytic continuations we can obtain mtheory solutions having ads_2times s3 or ads_3times s2 factors it is shown that our result is equivalent to the ads solutions which have been recently reported as the nearhorizon geometry of m2 or m5branes wrapped on 2 or 4cycles in calabiyau threefolds we also discuss the hierarchy of mtheory bubbles with different number of supersymmetries
|
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|
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|
706.2043
|
Phase Spaces in Special Relativity: Towards Eliminating Gravitational
Singularities
|
This paper shows one way to construct phase spaces in special relativity by
expanding Minkowski Space. These spaces appear to indicate that we can dispense
with gravitational singularities. The key mathematical ideas in the present
approach are to include a complex phase factor, such as, e^{i\phi} in the
Lorentz transformation and to use both the proper time and the proper mass as
parameters. To develop the most general case, a complex parameter \sigma=s+im,
is introduced, where s is the proper time, and m is the proper mass, and \sigma
and {\sigma}/{|\sigma|} are used to parameterize the position of a particle (or
reference frame) in space-time-matter phase space. A new reference variable,
u={m}/{r}, is needed (in addition to velocity), and assumed to be bounded by 0
and {c^{2}}/{G}=1, in geometrized units. Several results are derived: The
equation E=mc^2 apparently needs to be modified to
E^2={s^2c^{10}}/{G^2}+m^2c^4, but a simpler (invariant) parameter is the
"energy to length" ratio, which is {c^4}/{G} for any spherical region of
space-time-matter. The generalized "momentum vector" becomes completely
"masslike" for u\approx 0.79, which we think indicates the existence of a
maximal gravity field. Thus, gravitational singularities do not occur. Instead,
as u approaches 1 matter is apparently simply crushed into free space. In the
last section of this paper we attempt some further generalizations of the phase
space ideas developed in this paper.
|
astro-ph
|
this paper shows one way to construct phase spaces in special relativity by expanding minkowski space these spaces appear to indicate that we can dispense with gravitational singularities the key mathematical ideas in the present approach are to include a complex phase factor such as eiphi in the lorentz transformation and to use both the proper time and the proper mass as parameters to develop the most general case a complex parameter sigmasim is introduced where s is the proper time and m is the proper mass and sigma and sigmasigma are used to parameterize the position of a particle or reference frame in spacetimematter phase space a new reference variable umr is needed in addition to velocity and assumed to be bounded by 0 and c2g1 in geometrized units several results are derived the equation emc2 apparently needs to be modified to e2s2c10g2m2c4 but a simpler invariant parameter is the energy to length ratio which is c4g for any spherical region of spacetimematter the generalized momentum vector becomes completely masslike for uapprox 079 which we think indicates the existence of a maximal gravity field thus gravitational singularities do not occur instead as u approaches 1 matter is apparently simply crushed into free space in the last section of this paper we attempt some further generalizations of the phase space ideas developed in this paper
|
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|
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|
706.2044
|
Lines of minima are uniformly quasi-geodesic
|
We continue the comparison between lines of minima and Teichmueller geodesics
begun in [CRS1]. We show that in the Teichmueller space of a surface S, lines
of minima are quasi-geodesic with respect to the Teichmueller metric. The
quasi-geodesic constants depend only on the topological type of S.
|
math.GT
|
we continue the comparison between lines of minima and teichmueller geodesics begun in crs1 we show that in the teichmueller space of a surface s lines of minima are quasigeodesic with respect to the teichmueller metric the quasigeodesic constants depend only on the topological type of s
|
[['we', 'continue', 'the', 'comparison', 'between', 'lines', 'of', 'minima', 'and', 'teichmueller', 'geodesics', 'begun', 'in', 'crs1', 'we', 'show', 'that', 'in', 'the', 'teichmueller', 'space', 'of', 'a', 'surface', 's', 'lines', 'of', 'minima', 'are', 'quasigeodesic', 'with', 'respect', 'to', 'the', 'teichmueller', 'metric', 'the', 'quasigeodesic', 'constants', 'depend', 'only', 'on', 'the', 'topological', 'type', 'of', 's']]
|
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|
706.2045
|
Measurement of Branching Fraction and Time-Dependent CP Asymmetry
Parameters in B0 -> D*+ D*- Ks Decays
|
We present a measurement of the branching fraction and time-dependent CP
violation parameters for B0 -> D*+ D*- Ks decays. We also obtain an upper limit
on the product branching fraction for the possible two-body decay, B0 ->
Ds1+(2536) D*-. These results are obtained from a 414 fb-1 data sample that
contains 449e10^6 BBbar pairs collected at the Upsilon(4S) resonance with the
Belle detector at the KEKB asymmetric e+e- collider.
|
hep-ex
|
we present a measurement of the branching fraction and timedependent cp violation parameters for b0 d d ks decays we also obtain an upper limit on the product branching fraction for the possible twobody decay b0 ds12536 d these results are obtained from a 414 fb1 data sample that contains 449e106 bbbar pairs collected at the upsilon4s resonance with the belle detector at the kekb asymmetric ee collider
|
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|
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|
706.2046
|
Non-Supersymmetric Unattractors in Born-Infeld Black Holes
|
We investigate unattractor behavior in non-extremal black holes in
Einstein-Born-Infeld-Dilaton theory of gravity in four-dimensional
asymptotically flat spacetime. We obtain solutions which are non-singular near
the horizon and dependent on the value of the dilaton field at the infinity,
using perturbation method. It is shown that the value of the scalar field at
the horizon is determined by its asymptotic value and the charges carried by
the black hole. And we also find it is not true in general that the dilaton
value at the horizon is a monotonically increasing function of the first
coefficient of its series expansion in non-extremal Born-Infeld black holes.
|
hep-th
|
we investigate unattractor behavior in nonextremal black holes in einsteinborninfelddilaton theory of gravity in fourdimensional asymptotically flat spacetime we obtain solutions which are nonsingular near the horizon and dependent on the value of the dilaton field at the infinity using perturbation method it is shown that the value of the scalar field at the horizon is determined by its asymptotic value and the charges carried by the black hole and we also find it is not true in general that the dilaton value at the horizon is a monotonically increasing function of the first coefficient of its series expansion in nonextremal borninfeld black holes
|
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|
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|
706.2047
|
Dynamic ordering of driven vortex matter in the peak effect regime of
amorphous MoGe films and 2H-NbSe2 crystals
|
Dynamic ordering of driven vortex matter has been investigated in the peak
effect regime of both amorphous MoGe films and 2H-NbSe2 crystals by mode
locking (ML) and dc transport measurements. ML features allow us to trace how
the shear rigidity of driven vortices evolves with the average velocity.
Determining the onset of ML resonance in different magnetic fields and/or
temperatures, we find that the dynamic ordering frequency (velocity) exhibits a
striking divergence in the higher part of the peak effect regime.
Interestingly, this phenomenon is accompanied by a pronounced peak of dynamic
critical current. Mapping out field-temperature phase diagrams, we find that
divergent points follow well the thermodynamic melting curve of the ideal
vortex lattice over wide field and/or temperature ranges. These findings
provide a link between the dynamic and static melting phenomena which can be
distinguished from the disorder induced peak effect.
|
cond-mat.supr-con cond-mat.dis-nn
|
dynamic ordering of driven vortex matter has been investigated in the peak effect regime of both amorphous moge films and 2hnbse2 crystals by mode locking ml and dc transport measurements ml features allow us to trace how the shear rigidity of driven vortices evolves with the average velocity determining the onset of ml resonance in different magnetic fields andor temperatures we find that the dynamic ordering frequency velocity exhibits a striking divergence in the higher part of the peak effect regime interestingly this phenomenon is accompanied by a pronounced peak of dynamic critical current mapping out fieldtemperature phase diagrams we find that divergent points follow well the thermodynamic melting curve of the ideal vortex lattice over wide field andor temperature ranges these findings provide a link between the dynamic and static melting phenomena which can be distinguished from the disorder induced peak effect
|
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|
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|
706.2048
|
Thouless-Anderson-Palmer equation for analog neural network with
temporally fluctuating white synaptic noise
|
Effects of synaptic noise on the retrieval process of associative memory
neural networks are studied from the viewpoint of neurobiological and
biophysical understanding of information processing in the brain. We
investigate the statistical mechanical properties of stochastic analog neural
networks with temporally fluctuating synaptic noise, which is assumed to be
white noise. Such networks, in general, defy the use of the replica method,
since they have no energy concept. The self-consistent signal-to-noise analysis
(SCSNA), which is an alternative to the replica method for deriving a set of
order parameter equations, requires no energy concept and thus becomes
available in studying networks without energy functions. Applying the SCSNA to
stochastic network requires the knowledge of the Thouless-Anderson-Palmer (TAP)
equation which defines the deterministic networks equivalent to the original
stochastic ones. The study of the TAP equation which is of particular interest
for the case without energy concept is very few, while it is closely related to
the SCSNA in the case with energy concept. This paper aims to derive the TAP
equation for networks with synaptic noise together with a set of order
parameter equations by a hybrid use of the cavity method and the SCSNA.
|
cond-mat.dis-nn cond-mat.stat-mech
|
effects of synaptic noise on the retrieval process of associative memory neural networks are studied from the viewpoint of neurobiological and biophysical understanding of information processing in the brain we investigate the statistical mechanical properties of stochastic analog neural networks with temporally fluctuating synaptic noise which is assumed to be white noise such networks in general defy the use of the replica method since they have no energy concept the selfconsistent signaltonoise analysis scsna which is an alternative to the replica method for deriving a set of order parameter equations requires no energy concept and thus becomes available in studying networks without energy functions applying the scsna to stochastic network requires the knowledge of the thoulessandersonpalmer tap equation which defines the deterministic networks equivalent to the original stochastic ones the study of the tap equation which is of particular interest for the case without energy concept is very few while it is closely related to the scsna in the case with energy concept this paper aims to derive the tap equation for networks with synaptic noise together with a set of order parameter equations by a hybrid use of the cavity method and the scsna
|
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|
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|
706.2049
|
Geometry of curves with exceptional secant planes: linear series along
the general curve
|
We study linear series on a general curve of genus $g$, whose images are
exceptional with regard to their secant planes. Working in the framework of an
extension of Brill-Noether theory to pairs of linear series, we prove that a
general curve has no linear series with exceptional secant planes, in a very
precise sense, whenever the total number of series is finite. Next, we
partially solve the problem of computing the number of linear series with
exceptional secant planes in a one-parameter family in terms of tautological
classes associated with the family, by evaluating our hypothetical formula
along judiciously-chosen test families. As an application, we compute the
number of linear series with exceptional secant planes on a general curve
equipped with a one-dimensional family of linear series. We pay special
attention to the extremal case of $d$-secant $(d-2)$-planes to
$(2d-1)$-dimensional series, which appears in the study of Hilbert schemes of
points on surfaces. In that case, our formula may be rewritten in terms of
hypergeometric series, which allows us both to prove that it is nonzero and to
deduce its asymptotics in $d$.
|
math.AG math.CO
|
we study linear series on a general curve of genus g whose images are exceptional with regard to their secant planes working in the framework of an extension of brillnoether theory to pairs of linear series we prove that a general curve has no linear series with exceptional secant planes in a very precise sense whenever the total number of series is finite next we partially solve the problem of computing the number of linear series with exceptional secant planes in a oneparameter family in terms of tautological classes associated with the family by evaluating our hypothetical formula along judiciouslychosen test families as an application we compute the number of linear series with exceptional secant planes on a general curve equipped with a onedimensional family of linear series we pay special attention to the extremal case of dsecant d2planes to 2d1dimensional series which appears in the study of hilbert schemes of points on surfaces in that case our formula may be rewritten in terms of hypergeometric series which allows us both to prove that it is nonzero and to deduce its asymptotics in d
|
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|
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|
706.205
|
Black Holes and Large N Species Solution to the Hierarchy Problem
|
We provide the perturbative and non-perturbative arguments showing that
theories with large number of species of the quantum fields, imply an
inevitable hierarchy between the masses of the species and the Planck scale,
shedding a different light on the hierarchy problem. In particular, using the
black hole physics, we prove that any consistent theory that includes N number
of the Z_2-conserved species of the quantum fields of mass \Lambda, puts a
lower bound on the Planck mass, which in large N limit is given by N\Lambda^2.
An useful byproduct of this proof is that any exactly conserved quantum charge,
not associated with a long-range classical field, must be defined maximum
modulo N, bounded by the the ratio of the Planck to the unit charge masses
squared. For example, a continuous global U(1) `baryon number' symmetry, must
be explicitly broken by gravity, at least down to a Z_N subgroup, with N
bounded by the ratio of the Planck to baryon masses squared. The same
constraint applies to any discrete gauge symmetry, as well as to other
quantum-mechanically detectable black hole charges that are associated with the
massive quantum hair of the black hole. We show that the
gravitationally-coupled N-species sector that solves the gauge hirearchy
problem, should be probed by LHC.
|
hep-th
|
we provide the perturbative and nonperturbative arguments showing that theories with large number of species of the quantum fields imply an inevitable hierarchy between the masses of the species and the planck scale shedding a different light on the hierarchy problem in particular using the black hole physics we prove that any consistent theory that includes n number of the z_2conserved species of the quantum fields of mass lambda puts a lower bound on the planck mass which in large n limit is given by nlambda2 an useful byproduct of this proof is that any exactly conserved quantum charge not associated with a longrange classical field must be defined maximum modulo n bounded by the the ratio of the planck to the unit charge masses squared for example a continuous global u1 baryon number symmetry must be explicitly broken by gravity at least down to a z_n subgroup with n bounded by the ratio of the planck to baryon masses squared the same constraint applies to any discrete gauge symmetry as well as to other quantummechanically detectable black hole charges that are associated with the massive quantum hair of the black hole we show that the gravitationallycoupled nspecies sector that solves the gauge hirearchy problem should be probed by lhc
|
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|
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|
706.2051
|
Collapse of unit horizontal bundles equipped with a metric of
Cheeger-Gromoll type
|
We study unit horizontal bundles associated with Riemannian submersions.
First we investigate metric properties of an arbitrary unit horizontal bundle
equipped with a Riemannian metric of the Cheeger-Gromoll type. Next we examine
it from the Gromov-Hausdorff convergence theory point of view, and we state a
collapse theorem for unit horizontal bundles associated with a sequence of
warped Riemannian submersions.
|
math.DG math.MG
|
we study unit horizontal bundles associated with riemannian submersions first we investigate metric properties of an arbitrary unit horizontal bundle equipped with a riemannian metric of the cheegergromoll type next we examine it from the gromovhausdorff convergence theory point of view and we state a collapse theorem for unit horizontal bundles associated with a sequence of warped riemannian submersions
|
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|
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|
706.2052
|
Multicritical Points of Potts Spin Glasses on the Triangular Lattice
|
We predict the locations of several multicritical points of the Potts spin
glass model on the triangular lattice. In particular, continuous multicritical
lines, which consist of multicritical points, are obtained for two types of
two-state Potts (i.e., Ising) spin glasses with two- and three-body
interactions on the triangular lattice. These results provide us with numerous
examples to further verify the validity of the conjecture, which has succeeded
in deriving highly precise locations of multicritical points for several spin
glass models. The technique, called the direct triangular duality, a variant of
the ordinary duality transformation, directly relates the triangular lattice
with its dual triangular lattice in conjunction with the replica method.
|
cond-mat.dis-nn cond-mat.stat-mech
|
we predict the locations of several multicritical points of the potts spin glass model on the triangular lattice in particular continuous multicritical lines which consist of multicritical points are obtained for two types of twostate potts ie ising spin glasses with two and threebody interactions on the triangular lattice these results provide us with numerous examples to further verify the validity of the conjecture which has succeeded in deriving highly precise locations of multicritical points for several spin glass models the technique called the direct triangular duality a variant of the ordinary duality transformation directly relates the triangular lattice with its dual triangular lattice in conjunction with the replica method
|
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|
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|
706.2053
|
Simple Model of Complex Reflection Behaviour in Two-Species Community
|
The model of smart migration for two-species community is developed, where
the individuals implement reflexive strategy of spatial redistribution.
Simulations have been used to figure out the situations where reflexy gives an
advantage over a non-reflexive spatial behaviour, and vice versa.
|
q-bio.PE
|
the model of smart migration for twospecies community is developed where the individuals implement reflexive strategy of spatial redistribution simulations have been used to figure out the situations where reflexy gives an advantage over a nonreflexive spatial behaviour and vice versa
|
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|
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|
706.2054
|
Determining the Sign of the Z-Penguin Amplitude
|
We point out that the precision measurements of the pseudo observables R_b^0,
A_b, and A_FB^0,b performed at LEP and SLC suggest that in models with
minimal-flavor-violation the sign of the Z-penguin amplitude is identical to
the one present in the standard model. We determine the allowed range for the
non-standard contribution to the Inami-Lim function C and show by analyzing
possible scenarios with positive and negative interference of standard model
and new physics contributions, that the derived bound holds in each given case.
Finally, we derive lower and upper limits for the branching ratios of K^+ ->
pi^+ nu nubar, K_L -> pi^0 nu nubar, K_L -> mu^+ mu^-, B -> X_d,s nu nubar, and
B_d,s -> mu^+ mu^- within constrained minimal-flavor-violation making use of
the wealth of available data collected at the Z-pole.
|
hep-ph hep-ex
|
we point out that the precision measurements of the pseudo observables r_b0 a_b and a_fb0b performed at lep and slc suggest that in models with minimalflavorviolation the sign of the zpenguin amplitude is identical to the one present in the standard model we determine the allowed range for the nonstandard contribution to the inamilim function c and show by analyzing possible scenarios with positive and negative interference of standard model and new physics contributions that the derived bound holds in each given case finally we derive lower and upper limits for the branching ratios of k pi nu nubar k_l pi0 nu nubar k_l mu mu b x_ds nu nubar and b_ds mu mu within constrained minimalflavorviolation making use of the wealth of available data collected at the zpole
|
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|
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|
706.2055
|
The TACTIC atmospheric Cherenkov Imaging telescope
|
The TACTIC $\gamma$-ray telescope, equipped with a light collector of area
$\sim$9.5m$^2$ and a medium resolution imaging camera of 349-pixels, has been
in operation at Mt.Abu, India since 2001. This paper describes the main
features of its various subsystems and its overall performance with regard to
(a) tracking accuracy of its 2-axes drive system, (b) spot size of the light
collector, (c) back-end signal processing electronics and topological trigger
generation scheme, (d) data acquisition and control system and (e) relative and
absolute gain calibration methodology. Using a trigger field of view of
11$\times$11 pixels ($\sim$ 3.4$^\circ$$\times3.4^\circ$), the telescope
records a cosmic ray event rate of $\sim$2.5 Hz at a typical zenith angle of
15$^\circ$. Monte Carlo simulation results are also presented in the paper for
comparing the expected performance of the telescope with actual observational
results. The consistent detection of a steady signal from the Crab Nebula above
$\sim$1.2 TeV energy, at a sensitivity level of $\sim5.0\sigma$ in $\sim$25 h,
alongwith excellent matching of its energy spectrum with that obtained by other
groups, reassures that the performance of the TACTIC telescope is quite stable
and reliable. Furthermore, encouraged by the detection of strong $\gamma$-ray
signals from Mrk 501 (during 1997 and 2006 observations) and Mrk 421 (during
2001 and 2005-2006 observations), we believe that there is considerable scope
for the TACTIC telescope to monitor similar TeV $\gamma$-ray emission activity
from other active galactic nuclei on a long term basis.
|
astro-ph
|
the tactic gammaray telescope equipped with a light collector of area sim95m2 and a medium resolution imaging camera of 349pixels has been in operation at mtabu india since 2001 this paper describes the main features of its various subsystems and its overall performance with regard to a tracking accuracy of its 2axes drive system b spot size of the light collector c backend signal processing electronics and topological trigger generation scheme d data acquisition and control system and e relative and absolute gain calibration methodology using a trigger field of view of 11times11 pixels sim 34circtimes34circ the telescope records a cosmic ray event rate of sim25 hz at a typical zenith angle of 15circ monte carlo simulation results are also presented in the paper for comparing the expected performance of the telescope with actual observational results the consistent detection of a steady signal from the crab nebula above sim12 tev energy at a sensitivity level of sim50sigma in sim25 h alongwith excellent matching of its energy spectrum with that obtained by other groups reassures that the performance of the tactic telescope is quite stable and reliable furthermore encouraged by the detection of strong gammaray signals from mrk 501 during 1997 and 2006 observations and mrk 421 during 2001 and 20052006 observations we believe that there is considerable scope for the tactic telescope to monitor similar tev gammaray emission activity from other active galactic nuclei on a long term basis
|
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|
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|
706.2056
|
Recent Developments in Bbar -> X_s gamma
|
We present a concise review of the recent theoretical progress concerning the
standard model calculation of the inclusive radiative Bbar -> X_s gamma decay.
Particular attention is thereby devoted to the calculations of the
next-to-next-to-leading order fixed-order O(alpha_s^2) contributions, non-local
O(alpha_s Lambda/m_b) power corrections, and logarithmic-enhanced O(alpha_s^2)
cut-effects to the decay rate. The current status of new physics calculations
of the inclusive b -> s gamma mode is also briefly summarized.
|
hep-ph
|
we present a concise review of the recent theoretical progress concerning the standard model calculation of the inclusive radiative bbar x_s gamma decay particular attention is thereby devoted to the calculations of the nexttonexttoleading order fixedorder oalpha_s2 contributions nonlocal oalpha_s lambdam_b power corrections and logarithmicenhanced oalpha_s2 cuteffects to the decay rate the current status of new physics calculations of the inclusive b s gamma mode is also briefly summarized
|
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|
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|
706.2057
|
Marcus-Lushnikov processes, Smoluchowski's and Flory's models
|
The Marcus-Lushnikov process is a finite stochastic particle system in which
each particle is entirely characterized by its mass. Each pair of particles
with masses $x$ and $y$ merges into a single particle at a given rate $K(x,y)$.
We consider a {\it strongly gelling} kernel behaving as $K(x,y)=x^\alpha y + x
y^\alpha$ for some $\alpha\in (0,1]$. In such a case, it is well-known that
{\it gelation} occurs, that is, giant particles emerge. Then two possible
models for hydrodynamic limits of the Marcus-Lushnikov process arise: the
Smoluchowski equation, in which the giant particles are inert, and the Flory
equation, in which the giant particles interact with finite ones. We show that,
when using a suitable cut-off coagulation kernel in the Marcus-Lushnikov
process and letting the number of particles increase to infinity, the possible
limits solve either the Smoluchowski equation or the Flory equation. We also
study the asymptotic behaviour of the largest particle in the Marcus-Lushnikov
process without cut-off and show that there is only one giant particle. This
single giant particle represents, asymptotically, the lost mass of the solution
to the Flory equation.
|
math.PR
|
the marcuslushnikov process is a finite stochastic particle system in which each particle is entirely characterized by its mass each pair of particles with masses x and y merges into a single particle at a given rate kxy we consider a it strongly gelling kernel behaving as kxyxalpha y x yalpha for some alphain 01 in such a case it is wellknown that it gelation occurs that is giant particles emerge then two possible models for hydrodynamic limits of the marcuslushnikov process arise the smoluchowski equation in which the giant particles are inert and the flory equation in which the giant particles interact with finite ones we show that when using a suitable cutoff coagulation kernel in the marcuslushnikov process and letting the number of particles increase to infinity the possible limits solve either the smoluchowski equation or the flory equation we also study the asymptotic behaviour of the largest particle in the marcuslushnikov process without cutoff and show that there is only one giant particle this single giant particle represents asymptotically the lost mass of the solution to the flory equation
|
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|
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|
706.2058
|
Thermal stability of n-dodecane : experiments and kinetic modelling
|
The thermal decomposition of n-dodecane, a component of some jet fuels, has
been studied in a jet-stirred reactor at temperatures from 793 to 1093 K, for
residence times between 1 and 5 s and at atmospheric pressure. Thermal
decomposition of hydrocarbon fuel prior the entrance in the combustion chamber
is an envisaged way to cool the wall of hypersonic vehicles. The products of
the reaction are mainly hydrogen, methane, ethane, 1,3-butadiene and 1-alkenes
from ethylene to 1-undecene. For higher temperatures and residence times
acetylene, allene, propyne, cyclopentene, 1,3-cyclopentadiene and aromatic
compounds from benzene to pyrene through naphthalene have also been observed. A
previous detailed kinetic model of the thermal decomposition of n-dodecane
generated using EXGAS software has been improved and completed by a
sub-mechanism explaining the formation and the consumption of aromatic
compounds.
|
physics.chem-ph
|
the thermal decomposition of ndodecane a component of some jet fuels has been studied in a jetstirred reactor at temperatures from 793 to 1093 k for residence times between 1 and 5 s and at atmospheric pressure thermal decomposition of hydrocarbon fuel prior the entrance in the combustion chamber is an envisaged way to cool the wall of hypersonic vehicles the products of the reaction are mainly hydrogen methane ethane 13butadiene and 1alkenes from ethylene to 1undecene for higher temperatures and residence times acetylene allene propyne cyclopentene 13cyclopentadiene and aromatic compounds from benzene to pyrene through naphthalene have also been observed a previous detailed kinetic model of the thermal decomposition of ndodecane generated using exgas software has been improved and completed by a submechanism explaining the formation and the consumption of aromatic compounds
|
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|
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|
706.2059
|
BRIDGE: A Direct-tree Hybrid N-body Algorithm for Fully Self-consistent
Simulations of Star Clusters and their Parent Galaxies
|
We developed a new direct-tree hybrid N-body algorithm for fully
self-consistent N-body simulations of star clusters in their parent galaxies.
In such simulations, star clusters need high accuracy, while galaxies need a
fast scheme because of the large number of the particles required to model it.
In our new algorithm, the internal motion of the star cluster is calculated
accurately using the direct Hermite scheme with individual timesteps and all
other motions are calculated using the tree code with second-order leapfrog
integrator. The direct and tree schemes are combined using an extension of the
mixed variable symplectic (MVS) scheme. Thus, the Hamiltonian corresponding to
everything other than the internal motion of the star cluster is integrated
with the leapfrog, which is symplectic. Using this algorithm, we performed
fully self-consistent N-body simulations of star clusters in their parent
galaxy. The internal and orbital evolutions of the star cluster agreed well
with those obtained using the direct scheme. We also performed fully
self-consistent N-body simulation for large-N models ($N=2\times 10^6$). In
this case, the calculation speed was seven times faster than what would be if
the direct scheme was used.
|
astro-ph
|
we developed a new directtree hybrid nbody algorithm for fully selfconsistent nbody simulations of star clusters in their parent galaxies in such simulations star clusters need high accuracy while galaxies need a fast scheme because of the large number of the particles required to model it in our new algorithm the internal motion of the star cluster is calculated accurately using the direct hermite scheme with individual timesteps and all other motions are calculated using the tree code with secondorder leapfrog integrator the direct and tree schemes are combined using an extension of the mixed variable symplectic mvs scheme thus the hamiltonian corresponding to everything other than the internal motion of the star cluster is integrated with the leapfrog which is symplectic using this algorithm we performed fully selfconsistent nbody simulations of star clusters in their parent galaxy the internal and orbital evolutions of the star cluster agreed well with those obtained using the direct scheme we also performed fully selfconsistent nbody simulation for largen models n2times 106 in this case the calculation speed was seven times faster than what would be if the direct scheme was used
|
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|
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|
706.206
|
The autoignition of cyclopentane and cyclohexane in a shock tube
|
Ignition delay times of cyclohexane-oxygen-argon and
cyclopentane-oxygen-argon mixtures have been measured in a shock tube, the
onset of ignition being detected by OH radical emission. Mixtures contained 0.5
or 1 % of hydrocarbon for equivalence ratios ranging from 0.5 to 2. Reflected
shock waves allowed temperatures from 1230 to 1800 K and pressures from 7.3 to
9.5 atm to be obtained. These measurements have shown that cyclopentane is much
less reactive than cyclohexane, as for a given temperature the observed
autoignition delay times were about ten times higher for the C5 compound
compared to the C6. Detailed mechanisms for the combustion of cyclohexane and
cyclopentane have been proposed to reproduce these results. The elementary
steps included in the kinetic models of the oxidation of cyclanes are close to
those proposed to describe the oxidation of acyclic alkanes and alkenes.
Consequently, it has been possible to obtain these models by using an improved
version of software EXGAS, a computer package developed to perform the
automatic generation of detailed kinetic models for the gas-phase oxidation and
combustion of linear and branched alkanes and alkenes. Nevertheless, the
modelling of the oxidation of cyclanes requires to consider new types of
generic reactions, and especially to define new correlations for the estimation
of the rate constants. Ab initio calculations have been used to better know
some of the rate constants used in the case of cyclopentane. The main reaction
pathways have been derived from flow rate and sensitivity analyses.
|
physics.chem-ph
|
ignition delay times of cyclohexaneoxygenargon and cyclopentaneoxygenargon mixtures have been measured in a shock tube the onset of ignition being detected by oh radical emission mixtures contained 05 or 1 of hydrocarbon for equivalence ratios ranging from 05 to 2 reflected shock waves allowed temperatures from 1230 to 1800 k and pressures from 73 to 95 atm to be obtained these measurements have shown that cyclopentane is much less reactive than cyclohexane as for a given temperature the observed autoignition delay times were about ten times higher for the c5 compound compared to the c6 detailed mechanisms for the combustion of cyclohexane and cyclopentane have been proposed to reproduce these results the elementary steps included in the kinetic models of the oxidation of cyclanes are close to those proposed to describe the oxidation of acyclic alkanes and alkenes consequently it has been possible to obtain these models by using an improved version of software exgas a computer package developed to perform the automatic generation of detailed kinetic models for the gasphase oxidation and combustion of linear and branched alkanes and alkenes nevertheless the modelling of the oxidation of cyclanes requires to consider new types of generic reactions and especially to define new correlations for the estimation of the rate constants ab initio calculations have been used to better know some of the rate constants used in the case of cyclopentane the main reaction pathways have been derived from flow rate and sensitivity analyses
|
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|
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|
706.2061
|
Extension of the composite CBS-QB3 method to singlet diradical
calculations
|
The composite CBS-QB3 method is widely used to obtain accurate energies of
molecules and radicals although its use in the case of singlet diradicals gives
rise to some difficulties. The problem is related to the parameterized
correction this method introduces to account for spin-contamination. We report
a new term specifically designed to describe singlet diradicals separated by at
least one CH2 unit. As a test case, we have computed the formation enthalpy of
a series of diradicals that includes hydrocarbons as well as systems involving
heteroatoms (nitrogen, oxygen). The resulting CBS-QB3 energies are very close
to experiment.
|
physics.chem-ph
|
the composite cbsqb3 method is widely used to obtain accurate energies of molecules and radicals although its use in the case of singlet diradicals gives rise to some difficulties the problem is related to the parameterized correction this method introduces to account for spincontamination we report a new term specifically designed to describe singlet diradicals separated by at least one ch2 unit as a test case we have computed the formation enthalpy of a series of diradicals that includes hydrocarbons as well as systems involving heteroatoms nitrogen oxygen the resulting cbsqb3 energies are very close to experiment
|
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|
[-0.05441979924459398, 0.08193914595176466, -0.039692542549649566, 0.10824527711156406, -0.015206012743874453, -0.15660871499373266, 0.021067109094777454, 0.36952480817368877, -0.241385129513219, -0.3225200642676403, 0.061726218151306966, -0.2706453616071182, -0.09162662007535498, 0.18745492091208385, -0.026134609429088112, 0.005618139159802619, 0.03307989225140773, 0.01094969113667806, -0.0548436752166405, -0.23815973194238418, 0.2826171476820794, 0.07037384906046402, 0.20088879137620097, 0.10507703550198737, 0.09812157140064907, -0.035705340555675015, 0.02140826083874951, -0.021782332623843104, -0.12087763134369804, 0.13828441585913728, 0.26705974364692037, 0.035583519405918196, 0.2314821911228743, -0.4237138523409764, -0.19723464651421332, 0.09273407455960599, 0.11466944228838354, 0.1547206168373426, -0.05442102748323426, -0.1948922319667569, 0.03623062414408196, -0.17162755568278953, -0.15355329206310367, -0.09891287074424326, -0.016051906772190705, -0.005980498615826946, -0.2731316031422466, 0.10140167430411869, -0.0041938441451444914, 0.02558973096893169, -0.07542718106075579, -0.17367762013842972, -0.023594209562967688, 0.09798657581753407, 0.04273498907665877, 0.0281168481548472, 0.11936542208665439, -0.07063892121611086, -0.08031177937057994, 0.44646834566568333, -0.09281700702073674, -0.14991941353461394, 0.2097709583079753, -0.08509898635869224, -0.1507118425652152, 0.16869241185486317, 0.1516717285461103, 0.1511732581857359, -0.16185360622087805, 0.042448583245156137, -0.009902651130687445, 0.13981071099745654, 0.06343592612392968, 0.028101051233534236, 0.17191908438204942, 0.16229441555818389, 0.048533438397498685, 0.19006499560782686, -0.09385482041883127, -0.07745209328519802, -0.25878346325286355, -0.1857072587310237, -0.1453255133504475, 0.011146633682074025, 0.021576575241397222, -0.18047793436562642, 0.3670555569212108, 0.09446457059190531, 0.2076353417990807, -0.005437885607534554, 0.249052837229101, 0.10137514774093385, 0.10037686709983973, 0.0012629162908221285, 0.2064068128835667, 0.14831460912682815, 0.07809321651196417, -0.22009268658196865, 0.07737934327148348, 0.07593872993311379]
|
706.2062
|
Kinetic modelling of a surrogate diesel fuel applied to 3D auto-ignition
in HCCI engines
|
The prediction of auto-ignition delay times in HCCI engines has risen
interest on detailed chemical models. This paper described a validated kinetic
mechanism for the oxidation of a model Diesel fuel (n-decane and
α-methylnaphthalene). The 3D model for the description of low and high
temperature auto-ignition in engines is presented. The behavior of the model
fuel is compared with that of n-heptane. Simulations show that the 3D model
coupled with the kinetic mechanism can reproduce experimental HCCI and Diesel
engine results and that the correct modeling of auto-ignition in the cool flame
region is essential in HCCI conditions.
|
physics.chem-ph
|
the prediction of autoignition delay times in hcci engines has risen interest on detailed chemical models this paper described a validated kinetic mechanism for the oxidation of a model diesel fuel ndecane and 945methylnaphthalene the 3d model for the description of low and high temperature autoignition in engines is presented the behavior of the model fuel is compared with that of nheptane simulations show that the 3d model coupled with the kinetic mechanism can reproduce experimental hcci and diesel engine results and that the correct modeling of autoignition in the cool flame region is essential in hcci conditions
|
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|
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|
706.2063
|
Berry's phase for coherent states of Landau levels
|
The Berry phases for coherent states and squeezed coherent states of Landau
levels are calculated. Coherent states of Landau levels are interpreted as a
result of a magnetic flux moved adiabatically from infinity to a finite place
on the plane. The Abelian Berry phase for coherent states of Landau levels is
an analog of the Aharonov- Bohm effect. Moreover, the non-Abelian Berry phase
is calculated for the adiabatic evolution of the magnetic field B.
|
quant-ph
|
the berry phases for coherent states and squeezed coherent states of landau levels are calculated coherent states of landau levels are interpreted as a result of a magnetic flux moved adiabatically from infinity to a finite place on the plane the abelian berry phase for coherent states of landau levels is an analog of the aharonov bohm effect moreover the nonabelian berry phase is calculated for the adiabatic evolution of the magnetic field b
|
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|
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|
706.2064
|
Modelling of the gas-phase oxidation of cyclohexane
|
This paper presents a modeling study of the oxidation of cyclohexane from low
to intermediate temperature (650-1050 K), including the negative temperature
coefficient (NTC) zone. A detailed kinetic mechanism has been developed using
computer-aided generation. This comprehensive low-temperature mechanism
involves 513 species and 2446 reactions and includes two additions of
cyclohexyl radicals to oxygen, as well as subsequent reactions. The rate
constants of the reactions involving the formation of bicyclic species
(isomerizations, formation of cyclic ethers) have been evaluated from
literature data. This mechanism is able to satisfactorily reproduce
experimental results obtained in a rapid-compression machine for temperatures
ranging from 650 to 900 K and in a jet-stirred reactor from 750 to 1050 K.
Flow-rate analyses have been performed at low and intermediate temperatures.
|
physics.chem-ph
|
this paper presents a modeling study of the oxidation of cyclohexane from low to intermediate temperature 6501050 k including the negative temperature coefficient ntc zone a detailed kinetic mechanism has been developed using computeraided generation this comprehensive lowtemperature mechanism involves 513 species and 2446 reactions and includes two additions of cyclohexyl radicals to oxygen as well as subsequent reactions the rate constants of the reactions involving the formation of bicyclic species isomerizations formation of cyclic ethers have been evaluated from literature data this mechanism is able to satisfactorily reproduce experimental results obtained in a rapidcompression machine for temperatures ranging from 650 to 900 k and in a jetstirred reactor from 750 to 1050 k flowrate analyses have been performed at low and intermediate temperatures
|
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|
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|
706.2065
|
Weak collapsing and geometrisation of aspherical 3-manifolds
|
Let M be a closed, orientable, irreducible, non-simply connected 3-manifold.
We prove that if M admits a sequence of Riemannian metrics whose sectional
curvature is locally controlled and whose thick part becomes asymptotically
hyperbolic and has a sufficiently small volume, then M is Seifert fibred or
contains an incompressible torus. This result gives an alternative approach for
the last step in Perelman's proof of the Geometrisation Conjecture for
aspherical 3-manifolds.
|
math.GT
|
let m be a closed orientable irreducible nonsimply connected 3manifold we prove that if m admits a sequence of riemannian metrics whose sectional curvature is locally controlled and whose thick part becomes asymptotically hyperbolic and has a sufficiently small volume then m is seifert fibred or contains an incompressible torus this result gives an alternative approach for the last step in perelmans proof of the geometrisation conjecture for aspherical 3manifolds
|
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|
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|
706.2066
|
Primary reactions of the thermal decomposition of tricyclodecane
|
In order to better understand the thermal decomposition of polycyclanes, the
pyrolysis of tricyclodecane has been studied in a jet-stirred reactor at
temperatures from 848 to 933 K, for residence times between 0.5 and 6 s and at
atmospheric pressure, in order to obtain a conversion between 0.01 and 25 %.
The main products of the reaction are hydrogen, methane, ethylene, ethane,
propene, 1,3-cyclopentadiene, cyclopentene, benzene, 1,5-hexadiene, toluene and
3-cyclopentyl-cyclopentene. A primary mechanism containing all the possible
initiation steps, including those involving diradicals, as well as propagation
reactions has been developed and allows experimental results to be
satisfactorily modeled. The main reaction pathways of consumption of
tricyclodecane and of formation of the main products have been derived from
flow rate and sensitivity analyses.
|
physics.chem-ph
|
in order to better understand the thermal decomposition of polycyclanes the pyrolysis of tricyclodecane has been studied in a jetstirred reactor at temperatures from 848 to 933 k for residence times between 05 and 6 s and at atmospheric pressure in order to obtain a conversion between 001 and 25 the main products of the reaction are hydrogen methane ethylene ethane propene 13cyclopentadiene cyclopentene benzene 15hexadiene toluene and 3cyclopentylcyclopentene a primary mechanism containing all the possible initiation steps including those involving diradicals as well as propagation reactions has been developed and allows experimental results to be satisfactorily modeled the main reaction pathways of consumption of tricyclodecane and of formation of the main products have been derived from flow rate and sensitivity analyses
|
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|
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|
706.2067
|
Use of detailed kinetic mechanisms for the prediction of autoignitions
|
This paper describes how automatically generated detailed kinetic mechanisms
are obtained for the oxidation of alkanes and how these models could lead to a
better understanding of autoignition and cool flame risks at elevated
conditions. Examples of prediction of the occurrence of different autoignition
phenomena, such as cool flames or two-stage ignitions are presented depending
on the condition of pressure, temperature and mixture composition. Three
compounds are treated, a light alkane, propane, and two heavier ones, n-heptane
and n-decane.
|
physics.chem-ph
|
this paper describes how automatically generated detailed kinetic mechanisms are obtained for the oxidation of alkanes and how these models could lead to a better understanding of autoignition and cool flame risks at elevated conditions examples of prediction of the occurrence of different autoignition phenomena such as cool flames or twostage ignitions are presented depending on the condition of pressure temperature and mixture composition three compounds are treated a light alkane propane and two heavier ones nheptane and ndecane
|
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|
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|
706.2068
|
Experimental study of the structure of rich premixed
1,3-butadiene/CH4/O2/Ar flame
|
The structure of a laminar rich premixed 1,3-C4H6/CH4/O2/Ar flame have been
investigated. 1,3-Butadiene, methane, oxygen and argon mole fractions are
0.033; 0.2073; 0.3315, and 0.4280, respectively, for an equivalent ratio of
1.80. The flame has been stabilized on a burner at a pressure of 6.7 kPa (50
Torr). The concentration profiles of stable species were measured by gas
chromatography after sampling with a quartz probe. Quantified species included
carbon monoxide and dioxide, methane, oxygen, hydrogen, ethane, ethylene,
acetylene, propyne, allene, propene, cyclopropane, 1,3-butadiene, butenes,
1-butyne, vinylacetylene, diacetylene, C5 compounds, benzene, and toluene. The
temperature was measured thanks to a thermocouple in PtRh (6%)-PtRh (30%)
settled inside the enclosure and ranged from 900 K close to the burner up to
2100 K.
|
physics.chem-ph
|
the structure of a laminar rich premixed 13c4h6ch4o2ar flame have been investigated 13butadiene methane oxygen and argon mole fractions are 0033 02073 03315 and 04280 respectively for an equivalent ratio of 180 the flame has been stabilized on a burner at a pressure of 67 kpa 50 torr the concentration profiles of stable species were measured by gas chromatography after sampling with a quartz probe quantified species included carbon monoxide and dioxide methane oxygen hydrogen ethane ethylene acetylene propyne allene propene cyclopropane 13butadiene butenes 1butyne vinylacetylene diacetylene c5 compounds benzene and toluene the temperature was measured thanks to a thermocouple in ptrh 6ptrh 30 settled inside the enclosure and ranged from 900 k close to the burner up to 2100 k
|
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|
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|
706.2069
|
Building Portable Thread Schedulers for Hierarchical Multiprocessors:
the BubbleSched Framework
|
Exploiting full computational power of current more and more hierarchical
multiprocessor machines requires a very careful distribution of threads and
data among the underlying non-uniform architecture. Unfortunately, most
operating systems only provide a poor scheduling API that does not allow
applications to transmit valuable scheduling hints to the system. In a previous
paper, we showed that using a bubble-based thread scheduler can significantly
improve applications' performance in a portable way. However, since
multithreaded applications have various scheduling requirements, there is no
universal scheduler that could meet all these needs. In this paper, we present
a framework that allows scheduling experts to implement and experiment with
customized thread schedulers. It provides a powerful API for dynamically
distributing bubbles among the machine in a high-level, portable, and efficient
way. Several examples show how experts can then develop, debug and tune their
own portable bubble schedulers.
|
cs.DC
|
exploiting full computational power of current more and more hierarchical multiprocessor machines requires a very careful distribution of threads and data among the underlying nonuniform architecture unfortunately most operating systems only provide a poor scheduling api that does not allow applications to transmit valuable scheduling hints to the system in a previous paper we showed that using a bubblebased thread scheduler can significantly improve applications performance in a portable way however since multithreaded applications have various scheduling requirements there is no universal scheduler that could meet all these needs in this paper we present a framework that allows scheduling experts to implement and experiment with customized thread schedulers it provides a powerful api for dynamically distributing bubbles among the machine in a highlevel portable and efficient way several examples show how experts can then develop debug and tune their own portable bubble schedulers
|
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|
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|
706.207
|
Probing CP violation in neutrino oscillations with neutrino telescopes
|
Measurements of flavor ratios of astrophysical neutrino fluxes are sensitive
to the two yet unknown mixing parameters $\theta_{13}$ and $\delta$ through the
combination $\sin\theta_{13}\cos\delta$. We extend previous studies by
considering the possibility that neutrino fluxes from more than a single type
of sources will be measured. We point out that, if reactor experiments
establish a lower bound on $\theta_{13}$, then neutrino telescopes might
establish an upper bound on $|\cos\delta|$ that is smaller than one, and by
that prove that CP is violated in neutrino oscillations. Such a measurement
requires several favorable ingredients to occur: (i) $\theta_{13}$ is not far
below the present upper bound; (ii) The uncertainties in $\theta_{12}$ and
$\theta_{23}$ are reduced by a factor of about two; (iii) Neutrino fluxes from
muon-damped sources are identified, and their flavor ratios measured with
accuracy of order 10% or better. For the last condition to be achieved with the
planned km^3 detectors, the neutrino flux should be close to the Waxman-Bahcall
bound. It motivates neutrino telescopes that are effectively about 10 times
larger than IceCube for energies of O(100 TeV), even at the expense of a higher
energy threshold.
|
hep-ph astro-ph
|
measurements of flavor ratios of astrophysical neutrino fluxes are sensitive to the two yet unknown mixing parameters theta_13 and delta through the combination sintheta_13cosdelta we extend previous studies by considering the possibility that neutrino fluxes from more than a single type of sources will be measured we point out that if reactor experiments establish a lower bound on theta_13 then neutrino telescopes might establish an upper bound on cosdelta that is smaller than one and by that prove that cp is violated in neutrino oscillations such a measurement requires several favorable ingredients to occur i theta_13 is not far below the present upper bound ii the uncertainties in theta_12 and theta_23 are reduced by a factor of about two iii neutrino fluxes from muondamped sources are identified and their flavor ratios measured with accuracy of order 10 or better for the last condition to be achieved with the planned km3 detectors the neutrino flux should be close to the waxmanbahcall bound it motivates neutrino telescopes that are effectively about 10 times larger than icecube for energies of o100 tev even at the expense of a higher energy threshold
|
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|
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|
706.2071
|
Three loop DIS and transversity operator anomalous dimensions in the RI'
scheme
|
We discuss the computation of the three loop anomalous dimensions for various
operators used in deep inelastic scattering in the MSbar and RI' schemes. In
particular the results for the n = 5 and 6 Wilson operators in arbitrary linear
covariant gauge in the RI' scheme are new.
|
hep-ph
|
we discuss the computation of the three loop anomalous dimensions for various operators used in deep inelastic scattering in the msbar and ri schemes in particular the results for the n 5 and 6 wilson operators in arbitrary linear covariant gauge in the ri scheme are new
|
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|
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|
706.2072
|
A FRW Dark Fluid with a Non-Linear Inhomogeneous Equation of State
|
A dark Friedman-Robertson-Walker fluid governed by a non-linear inhomogeneous
equation of state is considered which can be viewed as a conveniently simple
paradigm for a whole class of models which exhibit phase transitions from a
non-phantom towards a phantom era (superacceleration transition). From another
side, such dark fluid models may describe also quintessence-like cosmic
acceleration. Thermodynamical considerations for the processes involved, which
are of great importance in the characterization of the global evolution of the
corresponding universe, are given too. Connecting the proposed equation of
state with an anisotropic Kasner universe with viscosity, we are led to the
plausible conjecture of a dark fluid origin of the anisotropies in the early
universe.
|
gr-qc
|
a dark friedmanrobertsonwalker fluid governed by a nonlinear inhomogeneous equation of state is considered which can be viewed as a conveniently simple paradigm for a whole class of models which exhibit phase transitions from a nonphantom towards a phantom era superacceleration transition from another side such dark fluid models may describe also quintessencelike cosmic acceleration thermodynamical considerations for the processes involved which are of great importance in the characterization of the global evolution of the corresponding universe are given too connecting the proposed equation of state with an anisotropic kasner universe with viscosity we are led to the plausible conjecture of a dark fluid origin of the anisotropies in the early universe
|
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|
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|
706.2073
|
An Efficient OpenMP Runtime System for Hierarchical Arch
|
Exploiting the full computational power of always deeper hierarchical
multiprocessor machines requires a very careful distribution of threads and
data among the underlying non-uniform architecture. The emergence of multi-core
chips and NUMA machines makes it important to minimize the number of remote
memory accesses, to favor cache affinities, and to guarantee fast completion of
synchronization steps. By using the BubbleSched platform as a threading backend
for the GOMP OpenMP compiler, we are able to easily transpose affinities of
thread teams into scheduling hints using abstractions called bubbles. We then
propose a scheduling strategy suited to nested OpenMP parallelism. The
resulting preliminary performance evaluations show an important improvement of
the speedup on a typical NAS OpenMP benchmark application.
|
cs.PL
|
exploiting the full computational power of always deeper hierarchical multiprocessor machines requires a very careful distribution of threads and data among the underlying nonuniform architecture the emergence of multicore chips and numa machines makes it important to minimize the number of remote memory accesses to favor cache affinities and to guarantee fast completion of synchronization steps by using the bubblesched platform as a threading backend for the gomp openmp compiler we are able to easily transpose affinities of thread teams into scheduling hints using abstractions called bubbles we then propose a scheduling strategy suited to nested openmp parallelism the resulting preliminary performance evaluations show an important improvement of the speedup on a typical nas openmp benchmark application
|
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|
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|
706.2074
|
Analysis on Heavy Quarkonia Transitions with Pion Emission in Terms of
the QCD Multipole Expansion and Determination of Mass Spectra of Hybrids
|
One of the most important tasks in high energy physics is search for the
exotic states, such as glueball, hybrid and multi-quark states. The transitions
$\psi(ns)\to \psi(ms)+\pi\pi$ and $\Upsilon(ns)\to \Upsilon(ms)+\pi\pi$ attract
great attentions because they may reveal characteristics of hybrids. In this
work, we analyze those transition modes in terms of the theoretical framework
established by Yan and Kuang. It is interesting to notice that the intermediate
states between the two gluon-emissions are hybrids, therefore by fitting the
data, we are able to determine the mass spectra of hybrids. The ground hybrid
states are predicted as 4.23 GeV (for charmonium) and 10.79 GeV (for bottonium)
which do not correspond to any states measured in recent experiments, thus it
may imply that very possibly, hybrids mix with regular quarkonia to constitute
physical states. Comprehensive comparisons of the potentials for hybrids whose
parameters are obtained in this scenario with the lattice results are
presented.
|
hep-ph
|
one of the most important tasks in high energy physics is search for the exotic states such as glueball hybrid and multiquark states the transitions psinsto psimspipi and upsilonnsto upsilonmspipi attract great attentions because they may reveal characteristics of hybrids in this work we analyze those transition modes in terms of the theoretical framework established by yan and kuang it is interesting to notice that the intermediate states between the two gluonemissions are hybrids therefore by fitting the data we are able to determine the mass spectra of hybrids the ground hybrid states are predicted as 423 gev for charmonium and 1079 gev for bottonium which do not correspond to any states measured in recent experiments thus it may imply that very possibly hybrids mix with regular quarkonia to constitute physical states comprehensive comparisons of the potentials for hybrids whose parameters are obtained in this scenario with the lattice results are presented
|
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|
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|
706.2075
|
Bianchi Model CMB Polarization and its Implications for CMB Anomalies
|
We derive the CMB radiative transfer equation in the form of a multipole
hierarchy in the nearly-Friedmann-Robertson-Walker limit of homogeneous, but
anisotropic, universes classified via their Bianchi type. Compared with
previous calculations, this allows a more sophisticated treatment of
recombination, produces predictions for the polarization of the radiation, and
allows for reionization. Our derivation is independent of any assumptions about
the dynamical behaviour of the field equations, except that it requires
anisotropies to be small back to recombination; this is already demanded by
observations.
We calculate the polarization signal in the Bianchi VIIh case, with the
parameters recently advocated to mimic the several large-angle anomalous
features observed in the CMB. We find that the peak polarization signal is ~
1.2 micro K for the best-fit model to the temperature anisotropies, and is
mostly confined to multipoles l<10. Remarkably, the predicted large-angle EE
and TE power spectra in the Bianchi model are consistent with WMAP observations
that are usually interpreted as evidence of early reionization. However, the
power in B-mode polarisation is predicted to be similar to the E-mode power and
parity-violating correlations are also predicted by the model; the WMAP
non-detection of either of these signals casts further strong doubts on the
veracity of attempts to explain the large-angle anomalies with global
anisotropy. On the other hand, given that there exist further dynamical degrees
of freedom in the VIIh universes that are yet to be compared with CMB
observations, we cannot at this time definitively reject the anisotropy
explanation.
|
astro-ph
|
we derive the cmb radiative transfer equation in the form of a multipole hierarchy in the nearlyfriedmannrobertsonwalker limit of homogeneous but anisotropic universes classified via their bianchi type compared with previous calculations this allows a more sophisticated treatment of recombination produces predictions for the polarization of the radiation and allows for reionization our derivation is independent of any assumptions about the dynamical behaviour of the field equations except that it requires anisotropies to be small back to recombination this is already demanded by observations we calculate the polarization signal in the bianchi viih case with the parameters recently advocated to mimic the several largeangle anomalous features observed in the cmb we find that the peak polarization signal is 12 micro k for the bestfit model to the temperature anisotropies and is mostly confined to multipoles l10 remarkably the predicted largeangle ee and te power spectra in the bianchi model are consistent with wmap observations that are usually interpreted as evidence of early reionization however the power in bmode polarisation is predicted to be similar to the emode power and parityviolating correlations are also predicted by the model the wmap nondetection of either of these signals casts further strong doubts on the veracity of attempts to explain the largeangle anomalies with global anisotropy on the other hand given that there exist further dynamical degrees of freedom in the viih universes that are yet to be compared with cmb observations we cannot at this time definitively reject the anisotropy explanation
|
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|
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|
706.2076
|
A Finite Semantics of Simply-Typed Lambda Terms for Infinite Runs of<br>
Automata
|
Model checking properties are often described by means of finite automata.
Any particular such automaton divides the set of infinite trees into finitely
many classes, according to which state has an infinite run. Building the full
type hierarchy upon this interpretation of the base type gives a finite
semantics for simply-typed lambda-trees.
A calculus based on this semantics is proven sound and complete. In
particular, for regular infinite lambda-trees it is decidable whether a given
automaton has a run or not. As regular lambda-trees are precisely recursion
schemes, this decidability result holds for arbitrary recursion schemes of
arbitrary level, without any syntactical restriction.
|
cs.LO
|
model checking properties are often described by means of finite automata any particular such automaton divides the set of infinite trees into finitely many classes according to which state has an infinite run building the full type hierarchy upon this interpretation of the base type gives a finite semantics for simplytyped lambdatrees a calculus based on this semantics is proven sound and complete in particular for regular infinite lambdatrees it is decidable whether a given automaton has a run or not as regular lambdatrees are precisely recursion schemes this decidability result holds for arbitrary recursion schemes of arbitrary level without any syntactical restriction
|
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|
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|
706.2077
|
Codon Usage Bias Measured Through Entropy Approach
|
Codon usage bias measure is defined through the mutual entropy calculation of
real codon frequency distribution against the quasi-equilibrium one. This
latter is defined in three manners: (1) the frequency of synonymous codons is
supposed to be equal (i.e., the arithmetic mean of their frequencies); (2) it
coincides to the frequency distribution of triplets; and, finally, (3) the
quasi-equilibrium frequency distribution is defined as the expected frequency
of codons derived from the dinucleotide frequency distribution. The measure of
bias in codon usage is calculated for 125 bacterial genomes.
|
q-bio.GN
|
codon usage bias measure is defined through the mutual entropy calculation of real codon frequency distribution against the quasiequilibrium one this latter is defined in three manners 1 the frequency of synonymous codons is supposed to be equal ie the arithmetic mean of their frequencies 2 it coincides to the frequency distribution of triplets and finally 3 the quasiequilibrium frequency distribution is defined as the expected frequency of codons derived from the dinucleotide frequency distribution the measure of bias in codon usage is calculated for 125 bacterial genomes
|
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|
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|
706.2078
|
Nonclassical dynamics of Bose condensates in an optical lattice in the
superfluid regime
|
A condensate in an optical lattice, prepared in the ground state of the
superfluid regime, is stimulated first by suddenly increasing the optical
lattice amplitude and then, after a waiting time, by abruptly decreasing this
amplitude to its initial value. Thus the system is first taken to the Mott
regime and then back to the initial superfluid regime. We show that, as a
consequence of this nonadiabatic process, the system falls into a configuration
far from equilibrium whose superfluid order parameter is described in terms of
a particular superposition of Glauber coherent states that we derive. We also
show that the classical equations of motion describing the time evolution of
this system are inequivalent to the standard discrete nonlinear Schreodinger
equations. By numerically integrating such equations with several initial
conditions, we show that the system loses coherence, becoming insulating.
|
cond-mat.mes-hall cond-mat.other
|
a condensate in an optical lattice prepared in the ground state of the superfluid regime is stimulated first by suddenly increasing the optical lattice amplitude and then after a waiting time by abruptly decreasing this amplitude to its initial value thus the system is first taken to the mott regime and then back to the initial superfluid regime we show that as a consequence of this nonadiabatic process the system falls into a configuration far from equilibrium whose superfluid order parameter is described in terms of a particular superposition of glauber coherent states that we derive we also show that the classical equations of motion describing the time evolution of this system are inequivalent to the standard discrete nonlinear schreodinger equations by numerically integrating such equations with several initial conditions we show that the system loses coherence becoming insulating
|
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|
[-0.14807406140209958, 0.22681542293081922, -0.12032799274164835, 0.019142258551000327, 0.015679299709112415, -0.1120823648818534, 0.06874896612658213, 0.3373497980881295, -0.3112655483176195, -0.22595882785955457, 0.10027600350293914, -0.2586906417105481, -0.11626174375615853, 0.16270419667984137, 0.009481250938269303, 0.06631715778594756, 0.055582066979460255, 0.02132406756750864, -0.09140131858733597, -0.22127136531563998, 0.34488990943436676, -0.006950030659439324, 0.26490734482230954, 0.01455923807036748, 0.12476585276438285, 0.00044661966352342467, 0.08615369396284223, 0.021585741107144372, -0.12749381155456524, 0.013100018159891712, 0.1984866027780574, 0.039471648864635674, 0.27121628154900007, -0.4497271014390875, -0.20766707889655298, 0.08041266288621712, 0.17161772928469507, 0.1927379064681511, 0.0060155495277626056, -0.3171305654758065, 0.018620265007903463, -0.18775239128874038, -0.16959082679287027, -0.07439842908609685, 0.06858247643832466, 0.018241558692974152, -0.24325793605756765, 0.08669334383436023, 0.07521684100246727, 0.0008122249087235026, -0.11131888726414617, -0.05625893843273143, -0.05513707918061359, 0.10148880001586333, 0.03759835638661145, 0.04618377133151985, 0.10790507695738145, -0.1558059520580598, -0.0393803485354288, 0.36668393293248236, -0.09510346870993351, -0.13236032719824384, 0.14928211871521604, -0.16708298880781094, -0.052181147517998225, 0.14898675068435693, 0.1314487966085724, 0.08843092694074559, -0.1313716549788126, 0.047339589930553636, -0.027843132665340633, 0.19326116080335576, 0.03306645738872157, 0.04361791131354654, 0.199241332471096, 0.1807876427192241, 0.050595579042414324, 0.19980338196062464, -0.048806273379269315, -0.14576260343013103, -0.30924763437360525, -0.13054067133624347, -0.19636723558626157, 0.06985863238881282, -0.03156905224954663, -0.1461556051261455, 0.39002389606195603, 0.15425088773975684, 0.1967387104326551, 0.02061842183629386, 0.28495254131074216, 0.20100528841231877, -0.017465247092567544, 0.05913352952657013, 0.2578573034726177, 0.12551588640655492, 0.12788780301594907, -0.2767629353413291, 0.013793051471576102, 0.06807801140164085]
|
706.2079
|
Collective Charge Excitations below the Metal-to-Insulator Transition in
BaVS3
|
The charge response in the barium vanadium sulfide (BaVS3) single crystals is
characterized by dc resistivity and low frequency dielectric spectroscopy. A
broad relaxation mode in MHz range with huge dielectric constant ~= 10^6
emerges at the metal-to-insulator phase transition TMI ~= 67 K, weakens with
lowering temperature and eventually levels off below the magnetic transition
Tchi ~= 30 K. The mean relaxation time is thermally activated in a manner
similar to the dc resistivity. These features are interpreted as signatures of
the collective charge excitations characteristic for the orbital ordering that
gradually develops below TMI and stabilizes at long-range scale below Tchi.
|
cond-mat.str-el
|
the charge response in the barium vanadium sulfide bavs3 single crystals is characterized by dc resistivity and low frequency dielectric spectroscopy a broad relaxation mode in mhz range with huge dielectric constant 106 emerges at the metaltoinsulator phase transition tmi 67 k weakens with lowering temperature and eventually levels off below the magnetic transition tchi 30 k the mean relaxation time is thermally activated in a manner similar to the dc resistivity these features are interpreted as signatures of the collective charge excitations characteristic for the orbital ordering that gradually develops below tmi and stabilizes at longrange scale below tchi
|
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|
[-0.1868279838003218, 0.34432299515698106, 0.025389227205887436, -0.04417283059796318, -0.022483234816409094, -0.16424048851476983, 0.140065932336729, 0.37456320570083335, -0.2919822504371405, -0.32040895662386903, 0.009673449393594637, -0.35979987165890637, -0.04419467709492892, 0.1284381679445505, 0.08252026901580393, -0.04190021845512092, -0.12835201132576912, 0.002881903680972755, -0.1283435181947425, -0.1210375501215458, 0.19609621299547142, 0.07247801575809718, 0.3184505669027567, 0.10339816549210809, 0.0388636739179492, -0.05460405683144927, 0.17892881958599902, 0.023889885277021676, -0.13165785473109282, -0.08170179849490523, 0.3097338031744584, -0.08374707654118538, 0.22074846231378614, -0.3690796375181526, -0.2090438643563539, 0.0034212323813699185, 0.12721554747084154, 0.09180615748744458, -0.04857868424267508, -0.23551776859909296, 0.0628573268931359, -0.10169929983559996, -0.1136775507265702, -0.09284312445670366, 0.005186166269704699, -0.04166548459790647, -0.23840895851142704, 0.19549147566780448, 0.08921689528040588, 0.15438568500569091, -0.137352239866741, -0.16597191966720856, -0.061921254666522145, 0.0029678802844136953, 0.036498385241720825, 0.07722326230723411, 0.2464361587911844, -0.0728859994187951, -0.049790479997172954, 0.2941512465197593, -0.12430552501231432, 0.04184023071546108, 0.16510973939206453, -0.2315656364755705, -0.02643374323321041, 0.30160586062818767, 0.1041583714011358, 0.09453939389903099, -0.10793751293211244, 0.03818292075622594, 0.06435621069511399, 0.23475844135507942, 0.09175250567030162, 0.07478470840491354, 0.2661079122312367, 0.2039863395690918, 0.03734182304004207, 0.1501169675635174, -0.11135353919715271, -0.04190718404366635, -0.22678953740629368, -0.09827263450482861, -0.1691518594705849, 0.06271170424995944, -0.09912470678755199, -0.15745225233957172, 0.36231859791907484, 0.08565615793690086, 0.23584591990336776, -0.01144597576931119, 0.23154544265242294, 0.1496910734649282, 0.09346124081173912, 0.05940174576360732, 0.22717937299516053, 0.17888712835730985, 0.20270660294219853, -0.3386821950471494, 0.07694914133753628, -0.019009841131046413]
|
706.208
|
Experiments on the twisted vortex state in superfluid 3He-B
|
We have performed measurements and numerical simulations on a bundle of
vortex lines which is expanding along a rotating column of initially
vortex-free 3He-B. Expanding vortices form a propagating front: Within the
front the superfluid is involved in rotation and behind the front the twisted
vortex state forms, which eventually relaxes to the equilibrium vortex state.
We have measured the magnitude of the twist and its relaxation rate as function
of temperature above 0.3Tc. We also demonstrate that the integrity of the
propagating vortex front results from axial superfluid flow, induced by the
twist.
|
cond-mat.soft
|
we have performed measurements and numerical simulations on a bundle of vortex lines which is expanding along a rotating column of initially vortexfree 3heb expanding vortices form a propagating front within the front the superfluid is involved in rotation and behind the front the twisted vortex state forms which eventually relaxes to the equilibrium vortex state we have measured the magnitude of the twist and its relaxation rate as function of temperature above 03tc we also demonstrate that the integrity of the propagating vortex front results from axial superfluid flow induced by the twist
|
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|
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|
706.2081
|
Preserving zeros of a polynomial
|
We study non-linear surjective mappings on subsets of ${\cal M}_n(F)$, which
preserve the zeros of some fixed polynomials in noncommuting variables.
Keywords: Matrix algebra, Multilinear polynomials, Preservers.
|
math.RA
|
we study nonlinear surjective mappings on subsets of cal m_nf which preserve the zeros of some fixed polynomials in noncommuting variables keywords matrix algebra multilinear polynomials preservers
|
[['we', 'study', 'nonlinear', 'surjective', 'mappings', 'on', 'subsets', 'of', 'cal', 'm_nf', 'which', 'preserve', 'the', 'zeros', 'of', 'some', 'fixed', 'polynomials', 'in', 'noncommuting', 'variables', 'keywords', 'matrix', 'algebra', 'multilinear', 'polynomials', 'preservers']]
|
[-0.22474677819344732, 0.050821350111315645, 0.007635904889967706, 0.03836353027468754, -0.12718351006818315, -0.164778682851681, -0.00818260710824419, 0.3083542774741848, -0.41015751466706946, -0.0737143601808283, 0.13350671075750142, -0.3495426807138655, -0.21737579235600102, 0.09987686326106389, -0.1540148458616049, 0.11653964669892082, 0.029947180300951004, 0.06153526377898676, -0.2295925012893147, -0.3128164804506081, 0.39852263419716444, -0.07902074060230344, 0.10806125878459877, -0.05038923514937913, 0.15308064853565562, 0.03330593592383795, -0.07390435791953846, -0.10022492479119036, -0.10036158240917656, 0.051644813967868686, 0.36997180011261394, 0.20175063932590462, 0.20480853050119346, -0.38768479503967146, -0.01962625400887595, 0.35812183607507636, 0.13656751790808308, -0.13597346213215064, 0.06920382502506038, -0.2780818093430113, 0.003150464311518051, -0.07974574259585804, -0.11060287209262175, -0.15255231869889907, 0.056300028054802505, 0.09271342686756893, -0.3563009104518979, 0.01842036594947179, 0.15115660779109155, 0.2104047981125337, 0.017878038049847993, -0.19920097822668376, -0.01729385499601011, -0.008256610500177852, -0.0883837449191897, 0.03774295037577825, 0.12156663469418331, -0.01691516302525997, -0.1421608349170398, 0.3107434879574511, 0.06244554422381851, -0.35575180252393085, 0.03001455190005126, -0.2677828673342312, -0.3092854932916385, 0.03463718626234266, 0.1491880132989199, 0.1555813012851609, -0.061947903837318775, 0.26377996222840416, -0.2382725383568969, 0.1286182718144523, 0.17868799364401233, 0.11675414506828895, 0.08160862554278639, -0.08420419444640477, 0.07111477310320845, 0.17403004811731754, 0.21029673893591044, -0.05487645470916673, -0.35554049302030494, -0.1113933478999469, -0.16235430255808211, 0.11412797523317514, -0.2694789367141547, -0.21189454246174405, 0.44800825196283833, 0.09836346236988902, 0.16200597053048787, 0.1446088881585402, 0.1156531674442468, 0.1315543358731601, 0.08506068026784945, 0.047704922794191924, 0.027478777481182652, 0.354530349580778, -0.038656337238434285, -0.1348671525440834, -0.01855358412420308, 0.29583586200519846]
|
706.2082
|
Elementary Excitations of a Bose-Einstein Condensate in an Effective
Magnetic Field
|
We calculate the low energy elementary excitations of a Bose-Einstein
Condensate in an effective magnetic field. The field is created by the
interplay between light beams carrying orbital angular momentum and the trapped
atoms. We examine the role of the homogeneous magnetic field, familiar from
studies of rotating condensates, and also investigate spectra for vector
potentials with a more general radial dependence. We discuss the instabilities
which arise and how these may be manifested.
|
cond-mat.other
|
we calculate the low energy elementary excitations of a boseeinstein condensate in an effective magnetic field the field is created by the interplay between light beams carrying orbital angular momentum and the trapped atoms we examine the role of the homogeneous magnetic field familiar from studies of rotating condensates and also investigate spectra for vector potentials with a more general radial dependence we discuss the instabilities which arise and how these may be manifested
|
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|
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|
706.2083
|
Huge negative differential conductance in Au-H2 molecular nanojunctions
|
Experimental results showing huge negative differential conductance in
gold-hydrogen molecular nanojunctions are presented. The results are analyzed
in terms of two-level system (TLS) models: it is shown that a simple TLS model
cannot produce peaklike structures in the differential conductance curves,
whereas an asymmetrically coupled TLS model gives perfect fit to the data. Our
analysis implies that the excitation of a bound molecule to a large number of
energetically similar loosely bound states is responsible for the peaklike
structures. Recent experimental studies showing related features are discussed
within the framework of our model.
|
cond-mat.mes-hall
|
experimental results showing huge negative differential conductance in goldhydrogen molecular nanojunctions are presented the results are analyzed in terms of twolevel system tls models it is shown that a simple tls model cannot produce peaklike structures in the differential conductance curves whereas an asymmetrically coupled tls model gives perfect fit to the data our analysis implies that the excitation of a bound molecule to a large number of energetically similar loosely bound states is responsible for the peaklike structures recent experimental studies showing related features are discussed within the framework of our model
|
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|
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|
706.2084
|
Phase lapses in scattering through multi-electron quantum dots:
Mean-field and few-particle regimes
|
We show that the observed evolution of the transmission phase through
multi-electron quantum dots with more than approximately ten electrons, which
shows a universal (i.e., independent of N) as yet unexplained behavior, is
consistent with an electrostatic model, where electron-electron interaction is
described by a mean-field approach. Moreover, we perform exact calculations for
an open 1D quantum dot and show that carrier correlations may give rise to a
non-universal (i.e., N-dependent) behavior of the transmission phase, ensuing
from Fano resonances, which is consistent with experiments with a few (N < 10)
carriers. Our results suggest that in the universal regime the coherent
transmission takes place through a single level while in the few-particle
regime the correlated scattering state is determined by the number of bound
particles.
|
cond-mat.mes-hall
|
we show that the observed evolution of the transmission phase through multielectron quantum dots with more than approximately ten electrons which shows a universal ie independent of n as yet unexplained behavior is consistent with an electrostatic model where electronelectron interaction is described by a meanfield approach moreover we perform exact calculations for an open 1d quantum dot and show that carrier correlations may give rise to a nonuniversal ie ndependent behavior of the transmission phase ensuing from fano resonances which is consistent with experiments with a few n 10 carriers our results suggest that in the universal regime the coherent transmission takes place through a single level while in the fewparticle regime the correlated scattering state is determined by the number of bound particles
|
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|
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|
706.2085
|
Quantum phase transitions in a resonant-level model with dissipation:
Renormalization-group studies
|
We study a spinless level that hybridizes with a fermionic band and is also
coupled via its charge to a dissipative bosonic bath. We consider the general
case of a power-law hybridization function $\Gamma(\w)\propto |\w|^r$ with
$r\ge 0$, and a bosonic bath spectral function $B(\w)\propto \w^s$ with $s\ge
-1$. For $r<1$ and $\mathrm{max}(0,2r-1)<s<1$, this Bose-Fermi quantum impurity
model features a continuous zero-temperature transition between a delocalized
phase, with tunneling between the impurity level and the band, and a localized
phase, in which dissipation suppresses tunneling in the low-energy limit. The
phase diagram and the critical behavior of the model are elucidated using
perturbative and numerical renormalization-group techniques, between which
there is excellent agreement in the appropriate regimes. For $r=0$ this model's
critical properties coincide with those of the spin-boson and Ising Bose-Fermi
Kondo models, as expected from bosonization.
|
cond-mat.str-el cond-mat.mes-hall
|
we study a spinless level that hybridizes with a fermionic band and is also coupled via its charge to a dissipative bosonic bath we consider the general case of a powerlaw hybridization function gammawpropto wr with rge 0 and a bosonic bath spectral function bwpropto ws with sge 1 for r1 and mathrmmax02r1s1 this bosefermi quantum impurity model features a continuous zerotemperature transition between a delocalized phase with tunneling between the impurity level and the band and a localized phase in which dissipation suppresses tunneling in the lowenergy limit the phase diagram and the critical behavior of the model are elucidated using perturbative and numerical renormalizationgroup techniques between which there is excellent agreement in the appropriate regimes for r0 this models critical properties coincide with those of the spinboson and ising bosefermi kondo models as expected from bosonization
|
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|
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|
706.2086
|
On the relation between the proton-air cross section and fluctuations of
the shower longitudinal profile
|
The current status and prospects of deducing the proton-air cross section
from fluorescence telescope measurements of extensive air showers are
discussed. As it is not possible to observe the point of first interaction, $X_
{\rm 1}$, directly, other observables closely linked to $X_{\rm 1}$ must be
inferred from the measured longitudinal profiles. This introduces a dependence
on the models used to describe the shower development. Systematic uncertainties
arising from this model dependence, from the reconstruction method itself and
from a possible non-proton contamination of the selected shower sample are
discussed.
|
astro-ph
|
the current status and prospects of deducing the protonair cross section from fluorescence telescope measurements of extensive air showers are discussed as it is not possible to observe the point of first interaction x_ rm 1 directly other observables closely linked to x_rm 1 must be inferred from the measured longitudinal profiles this introduces a dependence on the models used to describe the shower development systematic uncertainties arising from this model dependence from the reconstruction method itself and from a possible nonproton contamination of the selected shower sample are discussed
|
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|
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|
706.2087
|
Generalized rotating-wave approximation for arbitrarily large coupling
|
A generalized version of the rotating-wave approximation for the single-mode
spin-boson Hamiltonian is presented. It is shown that performing a simple
change of basis prior to eliminating the off-resonant terms results in a
significantly more accurate expression for the energy levels of the system. The
generalized approximation works for all values of the coupling strength and for
a wide range of detuning values, and may find applications in solid-state
experiments.
|
quant-ph
|
a generalized version of the rotatingwave approximation for the singlemode spinboson hamiltonian is presented it is shown that performing a simple change of basis prior to eliminating the offresonant terms results in a significantly more accurate expression for the energy levels of the system the generalized approximation works for all values of the coupling strength and for a wide range of detuning values and may find applications in solidstate experiments
|
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|
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|
706.2088
|
Laplacian instability of planar streamer ionization fronts - an example
of pulled front analysis
|
Streamer ionization fronts are pulled fronts propagating into a linearly
unstable state; the spatial decay of the initial condition of a planar front
selects dynamically one specific long time attractor out of a continuous
family. A transverse stability analysis has to take these features into
account. In this paper we introduce a framework for this transverse stability
analysis, involving stable and unstable manifolds in a weighted space. Within
this framework, a numerical dynamical systems method for the calculation of the
dispersion relation as an eigenvalue problem is defined and dispersion curves
for different values of the electron diffusion constant and of the electric
field ahead of the front are derived. Numerical solutions of the initial value
problem confirm the eigenvalue calculations. The numerical work is complemented
with analytical expressions for the dispersion relation in the limit of small
and large wave numbers and with a fit formula for intermediate wave numbers.
This empirical fit supports the conjecture that the smallest unstable wave
length of the Laplacian instability is proportional to the diffusion length
that characterizes the leading edge of the pulled ionization front.
|
nlin.PS
|
streamer ionization fronts are pulled fronts propagating into a linearly unstable state the spatial decay of the initial condition of a planar front selects dynamically one specific long time attractor out of a continuous family a transverse stability analysis has to take these features into account in this paper we introduce a framework for this transverse stability analysis involving stable and unstable manifolds in a weighted space within this framework a numerical dynamical systems method for the calculation of the dispersion relation as an eigenvalue problem is defined and dispersion curves for different values of the electron diffusion constant and of the electric field ahead of the front are derived numerical solutions of the initial value problem confirm the eigenvalue calculations the numerical work is complemented with analytical expressions for the dispersion relation in the limit of small and large wave numbers and with a fit formula for intermediate wave numbers this empirical fit supports the conjecture that the smallest unstable wave length of the laplacian instability is proportional to the diffusion length that characterizes the leading edge of the pulled ionization front
|
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|
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|
706.2089
|
Electron Correlation Driven Heavy-Fermion Formation in LiV2O4
|
Optical reflectivity measurements were performed on a single crystal of the
d-electron heavy-fermion (HF) metal LiV2O4. The results evidence the highly
incoherent character of the charge dynamics for all temperatures above T^*
\approx 20 K. The spectral weight of the optical conductivity is redistributed
over extremely broad energy scales (~ 5 eV) as the quantum coherence of the
charge carriers is recovered. This wide redistribution is, in sharp contrast to
f-electron Kondo lattice HF systems, characteristic of a metallic system close
to a correlation driven insulating state. Our results thus reveal that strong
electronic correlation effects dominate the low-energy charge dynamics and
heavy quasiparticle formation in LiV2O4. We propose the geometrical
frustration, which limits the extension of charge and spin ordering, as an
additional key ingredient of the low-temperature heavy-fermion formation in
this system.
|
cond-mat.str-el
|
optical reflectivity measurements were performed on a single crystal of the delectron heavyfermion hf metal liv2o4 the results evidence the highly incoherent character of the charge dynamics for all temperatures above t approx 20 k the spectral weight of the optical conductivity is redistributed over extremely broad energy scales 5 ev as the quantum coherence of the charge carriers is recovered this wide redistribution is in sharp contrast to felectron kondo lattice hf systems characteristic of a metallic system close to a correlation driven insulating state our results thus reveal that strong electronic correlation effects dominate the lowenergy charge dynamics and heavy quasiparticle formation in liv2o4 we propose the geometrical frustration which limits the extension of charge and spin ordering as an additional key ingredient of the lowtemperature heavyfermion formation in this system
|
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|
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|
706.209
|
The flavour projection of staggered fermions and the quarter-root trick
|
It is shown that the flavour projection of staggered fermions can be written
as a projection between the fields on four separate, but parallel, lattices,
where the fields on each are modified forms of the standard staggered fermion
field. Because the staggered Dirac operator acts equally on each lattice, it
respects this flavour projection. We show that the system can be gauged in the
usual fashion and that this does not interfere with flavour projection. We also
consider the path integral, showing that, prior to flavour projection, it
evaluates to the same form on each lattice and that this form is equal to that
used in the quarter-root trick. The flavour projection leaves a path integral
for a single flavour of field on each lattice.
|
hep-lat
|
it is shown that the flavour projection of staggered fermions can be written as a projection between the fields on four separate but parallel lattices where the fields on each are modified forms of the standard staggered fermion field because the staggered dirac operator acts equally on each lattice it respects this flavour projection we show that the system can be gauged in the usual fashion and that this does not interfere with flavour projection we also consider the path integral showing that prior to flavour projection it evaluates to the same form on each lattice and that this form is equal to that used in the quarterroot trick the flavour projection leaves a path integral for a single flavour of field on each lattice
|
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|
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|
706.2091
|
Pion freeze-out as seen through HBT correlations in heavy ion collisions
from FAIR/AGS to RHIC energies
|
We perform a systematic analysis of several HBT parameters in heavy ion
collisions from $E_{\rm beam}=2$ AGeV to $\sqrt {s_{\rm NN}}=200$ GeV within
the UrQMD transport approach and compare the results to experimental data where
available. We find that the 'lifetime' of the emission source as calculated
from $\tau \sim \sqrt{R_O^{2}-R_S^{2}}$, is larger than the experimentally
observed values at all investigated energies. The calculated volume of the pion
source ($V_f$) is found to increase monotonously with increasing beam energy
and the experimentally observed decrease of the measured $V_f$ at AGS is not
seen. Finally, we calculate the mean free path $\lambda_f=0.5-1$ fm of pions at
freeze-out and find a good description of the experimental data above the AGS
energy region, supporting the suggestion of a universal kinetic decoupling
criterion up to the highest RHIC energies.
|
nucl-th
|
we perform a systematic analysis of several hbt parameters in heavy ion collisions from e_rm beam2 agev to sqrt s_rm nn200 gev within the urqmd transport approach and compare the results to experimental data where available we find that the lifetime of the emission source as calculated from tau sim sqrtr_o2r_s2 is larger than the experimentally observed values at all investigated energies the calculated volume of the pion source v_f is found to increase monotonously with increasing beam energy and the experimentally observed decrease of the measured v_f at ags is not seen finally we calculate the mean free path lambda_f051 fm of pions at freezeout and find a good description of the experimental data above the ags energy region supporting the suggestion of a universal kinetic decoupling criterion up to the highest rhic energies
|
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|
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|
706.2092
|
The Monte Carlo and fractional kinetics approaches to the underground
anomalous subdiffusion of contaminants
|
This paper deals with a comparison of Fractional Derivative and Monte carlo
approaches to the modelling of anomalous diffusion in the field of particle
transport. The goal of this research is to provide a better insight on the
behavior of (radioactive) contaminant tracers when flowing through
heterogeneous media.
|
cond-mat.stat-mech
|
this paper deals with a comparison of fractional derivative and monte carlo approaches to the modelling of anomalous diffusion in the field of particle transport the goal of this research is to provide a better insight on the behavior of radioactive contaminant tracers when flowing through heterogeneous media
|
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|
[-0.0737556254316587, 0.08825108244006212, -0.105951850314644, 0.037972666694258805, -0.08206017618067563, -0.07475742148623492, 0.009862496262940113, 0.3616494926003118, -0.2800707685140272, -0.3064466254387905, 0.08214032706988898, -0.34518874483183026, -0.10409579317395885, 0.19542803604902778, -0.019974684866610914, 0.04090519184440685, 0.05071345439258342, -0.021912753683257808, -0.03866028997193401, -0.18216011906042695, 0.289074935639898, 0.10930563526926562, 0.28576017116817337, 0.04811115293220306, 0.11344552734711517, -0.025165436453486716, -0.11949896884228413, 0.03197255451232195, -0.17541508260183036, 0.17805948510067537, 0.22417791094630957, 0.019618009479017928, 0.2877168698857228, -0.46161485482783365, -0.2846274596134511, 0.08366284418540697, 0.1860584708604923, 0.09472496303169464, -0.08457917385627904, -0.2601578102136652, 0.02155093515223901, -0.16503939273146292, -0.14829873846611008, -0.009743510532037666, -0.025854895655356813, 0.07012124682902747, -0.27376576241416234, 0.10762585844713612, 0.029041615916260827, 0.08560804576457788, -0.031116747811514262, -0.10521678413109233, 0.05166853327925006, 0.11384825777895458, 0.1103444283095693, 0.021001930649314698, 0.1485197258880362, -0.20149908675618158, -0.11218903531941275, 0.38947417090336484, -0.08326324247173034, -0.21311687002889812, 0.2057312962715514, -0.16134947773146754, -0.11969309503911063, 0.15837117177045457, 0.22123788996153357, 0.13515411715828426, -0.234410814355518, 0.023548509167691616, 0.0025936166057363153, 0.11877371831117974, -0.05591532960534096, -0.008138673787470907, 0.2074819460588818, 0.2693532271611427, 0.06973470730008557, 0.1573462082693974, -0.10343520346699127, -0.14128638866047064, -0.26428825012408197, -0.2563799349979187, -0.15723563111775243, 0.0948663738866647, -0.08752663843885482, -0.19323639480474716, 0.3855571072393407, 0.21754404458139712, 0.1260837932738165, 0.0025793313349519544, 0.3281324008809558, 0.09203684390134488, -0.025902813727346558, 0.023722163391842816, 0.18231967060516277, 0.15254116830571243, 0.1679228776386784, -0.2634086830172843, 0.11029029185980714, 0.024640861297181498]
|
706.2093
|
Some Insights in Superdiffusive Transport
|
In this paper we deal with high-order corrections for the Fractional
Derivative approach to anomalous diffusion, in super-diffusive regime, which
become relevand whenever one attempts to describe the behavior of particles
close to normal diffusion.
|
cond-mat.stat-mech
|
in this paper we deal with highorder corrections for the fractional derivative approach to anomalous diffusion in superdiffusive regime which become relevand whenever one attempts to describe the behavior of particles close to normal diffusion
|
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|
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|
706.2094
|
Frustration, Area Law, and Interference in Quantum Spin Models
|
We study frustrated quantum systems from a quantum information perspective.
Within this approach, we find that highly frustrated systems do not follow any
general ''area law'' of block entanglement, while weakly frustrated ones have
area laws similar to those of nonfrustrated systems away from criticality. To
calculate the block entanglement in systems with degenerate ground states,
typical in frustrated systems, we define a ''cooling'' procedure of the ground
state manifold, and propose a frustration degree and a method to quantify
constructive and destructive interference effects of entanglement.
|
quant-ph cond-mat.other
|
we study frustrated quantum systems from a quantum information perspective within this approach we find that highly frustrated systems do not follow any general area law of block entanglement while weakly frustrated ones have area laws similar to those of nonfrustrated systems away from criticality to calculate the block entanglement in systems with degenerate ground states typical in frustrated systems we define a cooling procedure of the ground state manifold and propose a frustration degree and a method to quantify constructive and destructive interference effects of entanglement
|
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|
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|
706.2095
|
Normal and Anomalous Transport across an Interface: Monte Carlo and
Analytical Approach
|
In this paper we investigate the behavior of particles crossing a neat
interface between two media. A Monte Carlo and analytical model, based on
fractional derivatives, are presented and discussed in detail, together with a
comparison. Anomalous and normal diffusion are consdered.
|
cond-mat.stat-mech
|
in this paper we investigate the behavior of particles crossing a neat interface between two media a monte carlo and analytical model based on fractional derivatives are presented and discussed in detail together with a comparison anomalous and normal diffusion are consdered
|
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|
[-0.11922481014370555, 0.1168035963186767, -0.09372709413263493, 0.1110887085683871, -0.06544515867603988, -0.1203680066051098, 0.027958488889697302, 0.43371706528634557, -0.2172820847708641, -0.2917037272098951, 0.11770773447891016, -0.3328859669088227, -0.18395016324229357, 0.1772430559063739, 0.022249696838737624, 0.02852732238427895, 0.030282182891557857, -0.020927878528288226, -0.09092545616099747, -0.13693645546530805, 0.29009890780080017, 0.02403663260089915, 0.25285368225332805, 0.031176812299413652, 0.11636607655573909, -0.0034989920691814182, -0.08513216388116522, 0.0611640199928022, -0.21274794127065233, 0.15105565912203817, 0.16682487344596444, -0.05286063595743078, 0.1999190073778353, -0.46786254408156, -0.20035883650274539, 0.03610337964009221, 0.15724737251677165, 0.08988450172289116, -0.1253034952068247, -0.2716871952501739, 0.013614580696789412, -0.17782755727629837, -0.12116590476163276, -0.04937055314005148, -0.017563189720598664, 0.07733288352241421, -0.24205619787297597, 0.09920960693852976, -0.007284211494573732, 0.10409955500920372, -0.017004476519437824, -0.12975302717943743, 0.01766058570909791, 0.05731536379856307, 0.055790224958710916, -0.06455239077757408, 0.033464972636088865, -0.11010890716982143, -0.1506923820323697, 0.3532159090405557, -0.09274135908202791, -0.24512032101430545, 0.2416914347161698, -0.1741162755004153, -0.10441462700141639, 0.10859273181001587, 0.1813606546692005, 0.11935480611353386, -0.2285748448268306, 0.06346768067678346, 0.0035270268960696893, 0.09222414764780097, 0.01589475861727828, -0.035981828278702936, 0.13935540194009863, 0.21914979947231164, -0.04094569060224586, 0.19025238934995198, -0.07282592975761651, -0.1869549860655353, -0.34105027357979517, -0.2688501458387913, -0.15803011997443875, -0.024563420586651417, -0.08300133532079267, -0.16206803813394977, 0.3762838162209203, 0.18923068925647474, 0.19292907925640665, 0.0419084602149158, 0.26882203260618376, 0.1314589928426757, -0.06046559941023588, 0.05056816486005739, 0.2133679312949137, 0.12820081430964353, 0.09892596293059064, -0.22501679528050306, 0.07667148968477439, 0.06340989737953173]
|
706.2096
|
Measurement of the UHECR energy spectrum using data from the Surface
Detector of the Pierre Auger Observatory
|
At the southern site of the Pierre Auger Observatory, which is close to
completion, an exposure that significantly exceeds the largest forerunner
experiments has already been accumulated. We report a measurement of the cosmic
ray energy spectrum based on the high statistics collected by the surface
detector. The methods developed to determine the spectrum from reconstructed
observables are described. The energy calibration of the observables, which
exploits the correlation of surface detector data with fluorescence
measurements in hybrid events, is presented in detail. The methods are simple
and robust, exploiting the combination of fluorescence detector (FD) and
surface detector (SD) and do not rely on detailed numerical simulation or any
assumption about the chemical composition. Besides presenting statistical
uncertainties, we address the impact of systematic uncertainties.
|
astro-ph
|
at the southern site of the pierre auger observatory which is close to completion an exposure that significantly exceeds the largest forerunner experiments has already been accumulated we report a measurement of the cosmic ray energy spectrum based on the high statistics collected by the surface detector the methods developed to determine the spectrum from reconstructed observables are described the energy calibration of the observables which exploits the correlation of surface detector data with fluorescence measurements in hybrid events is presented in detail the methods are simple and robust exploiting the combination of fluorescence detector fd and surface detector sd and do not rely on detailed numerical simulation or any assumption about the chemical composition besides presenting statistical uncertainties we address the impact of systematic uncertainties
|
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|
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|
706.2097
|
The Physics of 2 is not 1+1
|
One of the most surprising consequences of quantum mechanics is the
entanglement of two or more distant particles. In an entangled EPR two-particle
system, the value of the momentum (position) for neither single subsystem is
determined. However, if one of the subsystems is measured to have a certain
momentum (position), the other subsystem is determined to have a unique
corresponding value, despite the distance between them. This peculiar behavior
of an entangled quantum system has surprisingly been observed experimentally in
two-photon temporal and spatial correlation measurements, such as ghost
interference and ghost imaging. This article addresses the fundamental concerns
behind these experimental observations and to explore the nonclassical nature
of two-photon superposition by emphasizing the physics of 2 is not 1 + 1.
|
quant-ph
|
one of the most surprising consequences of quantum mechanics is the entanglement of two or more distant particles in an entangled epr twoparticle system the value of the momentum position for neither single subsystem is determined however if one of the subsystems is measured to have a certain momentum position the other subsystem is determined to have a unique corresponding value despite the distance between them this peculiar behavior of an entangled quantum system has surprisingly been observed experimentally in twophoton temporal and spatial correlation measurements such as ghost interference and ghost imaging this article addresses the fundamental concerns behind these experimental observations and to explore the nonclassical nature of twophoton superposition by emphasizing the physics of 2 is not 1 1
|
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|
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|
706.2098
|
Integrability of anisotropic and homogeneous Universes in scalar-tensor
theory of gravitation
|
In this paper, we develop a method based on the analysis of the Kovalewski
exponents to study the integrability of anisotropic and homogeneous Universes.
The formalism is developed in scalar-tensor gravity, the general relativistic
case appearing as a special case of this larger framework. Then, depending on
the rationality of the Kovalewski exponents, the different models, both in the
vacuum and in presence of a barotropic matter fluid, are classified, and their
integrability is discussed.
|
gr-qc
|
in this paper we develop a method based on the analysis of the kovalewski exponents to study the integrability of anisotropic and homogeneous universes the formalism is developed in scalartensor gravity the general relativistic case appearing as a special case of this larger framework then depending on the rationality of the kovalewski exponents the different models both in the vacuum and in presence of a barotropic matter fluid are classified and their integrability is discussed
|
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|
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|
706.2099
|
Monte Carlo evaluation of FADE approach to anomalous kinetics
|
In this paper we propose a comparison between the CTRW (Monte Carlo) and
Fractional Derivative approaches to the modelling of anomalous diffusion
phenomena in the presence of an advection field. Galilei variant and invariant
schemes are revised.
|
cond-mat.stat-mech
|
in this paper we propose a comparison between the ctrw monte carlo and fractional derivative approaches to the modelling of anomalous diffusion phenomena in the presence of an advection field galilei variant and invariant schemes are revised
|
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|
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|
706.21
|
Molecular opacities for low-mass metal-poor AGB stars undergoing the
Third Dredge Up
|
The concomitant overabundances of C, N and s-process elements are commonly
ascribed to the complex interplay of nucleosynthesis, mixing and mass loss
taking place in Asymptotic Giant Branch stars. At low metallicity, the
enhancement of C and/or N may be up to 1000 times larger than the original iron
content and significantly affects the stellar structure and its evolution. For
this reason, the interpretation of the already available and still growing
amount of data concerning C-rich metal-poor stars belonging to our Galaxy as
well as to dwarf spheroidal galaxies would require reliable AGB stellar models
for low and very low metallicities. In this paper we address the question of
calculation and use of appropriate opacity coefficients, which take into
account the C enhancement caused by the third dredge up. A possible N
enhancement, caused by the cool bottom process or by the engulfment of protons
into the convective zone generated by a thermal pulse and the subsequent huge
third dredge up, is also considered. Basing on up-to-date stellar models, we
illustrate the changes induced by the use of these opacity on the physical and
chemical properties expected for these stars.
|
astro-ph
|
the concomitant overabundances of c n and sprocess elements are commonly ascribed to the complex interplay of nucleosynthesis mixing and mass loss taking place in asymptotic giant branch stars at low metallicity the enhancement of c andor n may be up to 1000 times larger than the original iron content and significantly affects the stellar structure and its evolution for this reason the interpretation of the already available and still growing amount of data concerning crich metalpoor stars belonging to our galaxy as well as to dwarf spheroidal galaxies would require reliable agb stellar models for low and very low metallicities in this paper we address the question of calculation and use of appropriate opacity coefficients which take into account the c enhancement caused by the third dredge up a possible n enhancement caused by the cool bottom process or by the engulfment of protons into the convective zone generated by a thermal pulse and the subsequent huge third dredge up is also considered basing on uptodate stellar models we illustrate the changes induced by the use of these opacity on the physical and chemical properties expected for these stars
|
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|
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|
706.2101
|
Dark Matter Annihilation in Substructures Revised
|
Upcoming $\gamma$-ray satellites will search for Dark Matter annihilations in
Milky Way substructures (or 'clumps'). The prospects for detecting these
objects strongly depend on the assumptions made on the distribution of Dark
Matter in substructures, and on the distribution of substructures in the Milky
Way halo. By adopting simplified, yet rather extreme, prescriptions for these
quantities, we compute the number of sources that can be detected with upcoming
experiments such as GLAST, and show that, for the most optimistic particle
physics setup ($m_\chi=40$ GeV and annihilation cross section $\sigma v = 3
\times 10^{-26}$ cm$^3$ s$^{-1}$), the result ranges from zero to $\sim$
hundred sources, all with mass above $10^{5}M\odot$. However, for a fiducial DM
candidate with mass $m_\chi=100$ GeV and $\sigma v = 10^{-26}$ cm$^3$ s$^{-1}$,
at most a handful of large mass substructures can be detected at $5 \sigma$,
with a 1-year exposure time, by a GLAST-like experiment. Scenarios where
micro-clumps (i.e. clumps with mass as small as $10^{-6}M\odot$) can be
detected are severely constrained by the diffuse $\gamma$-ray background
detected by EGRET.
|
astro-ph hep-ph
|
upcoming gammaray satellites will search for dark matter annihilations in milky way substructures or clumps the prospects for detecting these objects strongly depend on the assumptions made on the distribution of dark matter in substructures and on the distribution of substructures in the milky way halo by adopting simplified yet rather extreme prescriptions for these quantities we compute the number of sources that can be detected with upcoming experiments such as glast and show that for the most optimistic particle physics setup m_chi40 gev and annihilation cross section sigma v 3 times 1026 cm3 s1 the result ranges from zero to sim hundred sources all with mass above 105modot however for a fiducial dm candidate with mass m_chi100 gev and sigma v 1026 cm3 s1 at most a handful of large mass substructures can be detected at 5 sigma with a 1year exposure time by a glastlike experiment scenarios where microclumps ie clumps with mass as small as 106modot can be detected are severely constrained by the diffuse gammaray background detected by egret
|
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|
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|
706.2102
|
The lower mass function of the young open cluster Blanco 1: from 30 Mjup
to 3 Mo
|
We performed a deep wide field optical survey of the young (~100-150 Myr)
open cluster Blanco1 to study its low mass population well down into the brown
dwarf regime and estimate its mass function over the whole cluster mass
range.The survey covers 2.3 square degrees in the I and z-bands down to I ~ z ~
24 with the CFH12K camera. Considering two different cluster ages (100 and 150
Myr), we selected cluster member candidates on the basis of their location in
the (I,I-z) CMD relative to the isochrones, and estimated the contamination by
foreground late-type field dwarfs using statistical arguments, infrared
photometry and low-resolution optical spectroscopy. We find that our survey
should contain about 57% of the cluster members in the 0.03-0.6 Mo mass range,
including 30-40 brown dwarfs. The candidate's radial distribution presents
evidence that mass segregation has already occured in the cluster. We took it
into account to estimate the cluster mass function across the
stellar/substellar boundary. We find that, between 0.03Mo and 0.6Mo, the
cluster mass distribution does not depend much on its exact age, and is well
represented by a single power-law, with an index alpha=0.69 +/- 0.15. Over the
whole mass domain, from 0.03Mo to 3Mo, the mass function is better fitted by a
log-normal function with m0=0.36 +/- 0.07Mo and sigma=0.58 +/- 0.06. Comparison
between the Blanco1 mass function, other young open clusters' MF, and the
galactic disc MF suggests that the IMF, from the substellar domain to the
higher mass part, does not depend much on initial conditions. We discuss the
implications of this result on theories developed to date to explain the origin
of the mass distribution.
|
astro-ph
|
we performed a deep wide field optical survey of the young 100150 myr open cluster blanco1 to study its low mass population well down into the brown dwarf regime and estimate its mass function over the whole cluster mass rangethe survey covers 23 square degrees in the i and zbands down to i z 24 with the cfh12k camera considering two different cluster ages 100 and 150 myr we selected cluster member candidates on the basis of their location in the iiz cmd relative to the isochrones and estimated the contamination by foreground latetype field dwarfs using statistical arguments infrared photometry and lowresolution optical spectroscopy we find that our survey should contain about 57 of the cluster members in the 00306 mo mass range including 3040 brown dwarfs the candidates radial distribution presents evidence that mass segregation has already occured in the cluster we took it into account to estimate the cluster mass function across the stellarsubstellar boundary we find that between 003mo and 06mo the cluster mass distribution does not depend much on its exact age and is well represented by a single powerlaw with an index alpha069 015 over the whole mass domain from 003mo to 3mo the mass function is better fitted by a lognormal function with m0036 007mo and sigma058 006 comparison between the blanco1 mass function other young open clusters mf and the galactic disc mf suggests that the imf from the substellar domain to the higher mass part does not depend much on initial conditions we discuss the implications of this result on theories developed to date to explain the origin of the mass distribution
|
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|
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|
706.2103
|
Aharonov-Bohm effect and broken valley-degeneracy in graphene rings
|
We analyze theoretically the electronic properties of Aharonov-Bohm rings
made of graphene. We show that the combined effect of the ring confinement and
applied magnetic flux offers a controllable way to lift the orbital degeneracy
originating from the two valleys, even in the absence of intervalley
scattering. The phenomenon has observable consequences on the persistent
current circulating around the closed graphene ring, as well as on the ring
conductance. We explicitly confirm this prediction analytically for a circular
ring with a smooth boundary modelled by a space-dependent mass term in the
Dirac equation. This model describes rings with zero or weak intervalley
scattering so that the valley isospin is a good quantum number. The tunable
breaking of the valley degeneracy by the flux allows for the controlled
manipulation of valley isospins. We compare our analytical model to another
type of ring with strong intervalley scattering. For the latter case, we study
a ring of hexagonal form with lattice-terminated zigzag edges numerically. We
find for the hexagonal ring that the orbital degeneracy can still be controlled
via the flux, similar to the ring with the mass confinement.
|
cond-mat.mes-hall
|
we analyze theoretically the electronic properties of aharonovbohm rings made of graphene we show that the combined effect of the ring confinement and applied magnetic flux offers a controllable way to lift the orbital degeneracy originating from the two valleys even in the absence of intervalley scattering the phenomenon has observable consequences on the persistent current circulating around the closed graphene ring as well as on the ring conductance we explicitly confirm this prediction analytically for a circular ring with a smooth boundary modelled by a spacedependent mass term in the dirac equation this model describes rings with zero or weak intervalley scattering so that the valley isospin is a good quantum number the tunable breaking of the valley degeneracy by the flux allows for the controlled manipulation of valley isospins we compare our analytical model to another type of ring with strong intervalley scattering for the latter case we study a ring of hexagonal form with latticeterminated zigzag edges numerically we find for the hexagonal ring that the orbital degeneracy can still be controlled via the flux similar to the ring with the mass confinement
|
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|
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|
706.2104
|
Homogenization of nonlinear scalar conservation laws
|
We study the limit as $\e\to 0$ of the entropy solutions of the equation
$\p_t \ue + \dv_x[A(\frac{x}{\e},\ue)] =0$. We prove that the sequence $\ue$
two-scale converges towards a function $u(t,x,y)$, and $u$ is the unique
solution of a limit evolution problem. The remarkable point is that the limit
problem is not a scalar conservation law, but rather a kinetic equation in
which the macroscopic and microscopic variables are mixed. We also prove a
strong convergence result in $L^1_{\text{loc}}$.
|
math.AP
|
we study the limit as eto 0 of the entropy solutions of the equation p_t ue dv_xafracxeue 0 we prove that the sequence ue twoscale converges towards a function utxy and u is the unique solution of a limit evolution problem the remarkable point is that the limit problem is not a scalar conservation law but rather a kinetic equation in which the macroscopic and microscopic variables are mixed we also prove a strong convergence result in l1_textloc
|
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|
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|
706.2105
|
Equilibrium of stellar dynamical systems in the context of the
Vlasov-Poisson model
|
This short review is devoted to the problem of the equilibrium of stellar
dynamical systems in the context of the Vlasov-Poisson model. In a first part
we will review some classical problems posed by the application of the
Vlasov-Poisson model to the astrophysical systems like globular clusters or
galaxies. In a second part we will recall some recent numerical results which
may give us some some quantitative hints about the equilibrium state associated
to those systems.
|
astro-ph
|
this short review is devoted to the problem of the equilibrium of stellar dynamical systems in the context of the vlasovpoisson model in a first part we will review some classical problems posed by the application of the vlasovpoisson model to the astrophysical systems like globular clusters or galaxies in a second part we will recall some recent numerical results which may give us some some quantitative hints about the equilibrium state associated to those systems
|
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|
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|
706.2106
|
The size of the largest component below phase transition in
inhomogeneous random graphs
|
We study the "rank 1 case" of the inhomogeneous random graph model. In the
subcritical case we derive an exact formula for the asymptotic size of the
largest connected component scaled to log n. This result is new, it completes
the corresponding known result in the supercritical case. We provide some
examples of application of a new formula.
|
math.PR
|
we study the rank 1 case of the inhomogeneous random graph model in the subcritical case we derive an exact formula for the asymptotic size of the largest connected component scaled to log n this result is new it completes the corresponding known result in the supercritical case we provide some examples of application of a new formula
|
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|
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|
706.2107
|
Constrained Ramsey Numbers
|
For two graphs S and T, the constrained Ramsey number f(S, T) is the minimum
n such that every edge coloring of the complete graph on n vertices, with any
number of colors, has a monochromatic subgraph isomorphic to S or a rainbow
(all edges differently colored) subgraph isomorphic to T. The Erdos-Rado
Canonical Ramsey Theorem implies that f(S, T) exists if and only if S is a star
or T is acyclic, and much work has been done to determine the rate of growth of
f(S, T) for various types of parameters. When S and T are both trees having s
and t edges respectively, Jamison, Jiang, and Ling showed that f(S, T) <=
O(st^2) and conjectured that it is always at most O(st). They also mentioned
that one of the most interesting open special cases is when T is a path. In
this work, we study this case and show that f(S, P_t) = O(st log t), which
differs only by a logarithmic factor from the conjecture. This substantially
improves the previous bounds for most values of s and t.
|
math.CO
|
for two graphs s and t the constrained ramsey number fs t is the minimum n such that every edge coloring of the complete graph on n vertices with any number of colors has a monochromatic subgraph isomorphic to s or a rainbow all edges differently colored subgraph isomorphic to t the erdosrado canonical ramsey theorem implies that fs t exists if and only if s is a star or t is acyclic and much work has been done to determine the rate of growth of fs t for various types of parameters when s and t are both trees having s and t edges respectively jamison jiang and ling showed that fs t ost2 and conjectured that it is always at most ost they also mentioned that one of the most interesting open special cases is when t is a path in this work we study this case and show that fs p_t ost log t which differs only by a logarithmic factor from the conjecture this substantially improves the previous bounds for most values of s and t
|
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|
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|
706.2108
|
Unified description of Bjorken and Landau 1+1 hydrodynamics
|
We propose a generalization of the Bjorken in-out Ansatz for fluid
trajectories which, when applied to the (1+1) hydrodynamic equations, generates
a one-parameter family of analytic solutions interpolating between the
boost-invariant Bjorken picture and the non boost-invariant one by Landau. This
parameter characterises the proper-time scale when the fluid velocities
approach the in-out Ansatz. We discuss the resulting rapidity distribution of
entropy for various freeze-out conditions and compare it with the original
Bjorken and Landau results.
|
nucl-th hep-ph
|
we propose a generalization of the bjorken inout ansatz for fluid trajectories which when applied to the 11 hydrodynamic equations generates a oneparameter family of analytic solutions interpolating between the boostinvariant bjorken picture and the non boostinvariant one by landau this parameter characterises the propertime scale when the fluid velocities approach the inout ansatz we discuss the resulting rapidity distribution of entropy for various freezeout conditions and compare it with the original bjorken and landau results
|
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|
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|
706.2109
|
Bremsstrahlung in alpha-Decay Reexamined
|
A high-statistics measurement of bremsstrahlung emitted in the alpha decay of
210Po has been performed, which allows to follow the photon spectra up to
energies of ~ 500 keV. The measured differential emission probability is in
good agreement with our theoretical results obtained within the quasi classical
approximation as well as with the exact quantum mechanical calculation. It is
shown that due to the small effective electric dipole charge of the radiating
system a significant interference between the electric dipole and quadrupole
contributions occurs, which is altering substantially the angular correlation
between the alpha particle and the emitted photon.
|
nucl-ex nucl-th
|
a highstatistics measurement of bremsstrahlung emitted in the alpha decay of 210po has been performed which allows to follow the photon spectra up to energies of 500 kev the measured differential emission probability is in good agreement with our theoretical results obtained within the quasi classical approximation as well as with the exact quantum mechanical calculation it is shown that due to the small effective electric dipole charge of the radiating system a significant interference between the electric dipole and quadrupole contributions occurs which is altering substantially the angular correlation between the alpha particle and the emitted photon
|
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|
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|
706.211
|
On the strong chromatic number of random graphs
|
Let G be a graph with n vertices, and let k be an integer dividing n. G is
said to be strongly k-colorable if for every partition of V(G) into disjoint
sets V_1 \cup ... \cup V_r, all of size exactly k, there exists a proper vertex
k-coloring of G with each color appearing exactly once in each V_i. In the case
when k does not divide n, G is defined to be strongly k-colorable if the graph
obtained by adding k \lceil n/k \rceil - n isolated vertices is strongly
k-colorable. The strong chromatic number of G is the minimum k for which G is
strongly k-colorable. In this paper, we study the behavior of this parameter
for the random graph G(n, p). In the dense case when p >> n^{-1/3}, we prove
that the strong chromatic number is a.s. concentrated on one value \Delta+1,
where \Delta is the maximum degree of the graph. We also obtain several weaker
results for sparse random graphs.
|
math.CO math.PR
|
let g be a graph with n vertices and let k be an integer dividing n g is said to be strongly kcolorable if for every partition of vg into disjoint sets v_1 cup cup v_r all of size exactly k there exists a proper vertex kcoloring of g with each color appearing exactly once in each v_i in the case when k does not divide n g is defined to be strongly kcolorable if the graph obtained by adding k lceil nk rceil n isolated vertices is strongly kcolorable the strong chromatic number of g is the minimum k for which g is strongly kcolorable in this paper we study the behavior of this parameter for the random graph gn p in the dense case when p n13 we prove that the strong chromatic number is as concentrated on one value delta1 where delta is the maximum degree of the graph we also obtain several weaker results for sparse random graphs
|
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|
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|
706.2111
|
Influence of dissipation on the extraction of quantum states via
repeated measurements
|
A quantum system put in interaction with another one that is repeatedly
measured is subject to a non-unitary dynamics, through which it is possible to
extract subspaces. This key idea has been exploited to propose schemes aimed at
the generation of pure quantum states (purification). All such schemes have so
far been considered in the ideal situations of isolated systems. In this paper,
we analyze the influence of non-negligible interactions with environment during
the extraction process, with the scope of investigating the possibility of
purifying the state of a system in spite of the sources of dissipation. A
general framework is presented and a paradigmatic example consisting of two
interacting spins immersed in a bosonic bath is studied. The effectiveness of
the purification scheme is discussed in terms of purity for different values of
the relevant parameters and in connection with the bath temperature.
|
quant-ph
|
a quantum system put in interaction with another one that is repeatedly measured is subject to a nonunitary dynamics through which it is possible to extract subspaces this key idea has been exploited to propose schemes aimed at the generation of pure quantum states purification all such schemes have so far been considered in the ideal situations of isolated systems in this paper we analyze the influence of nonnegligible interactions with environment during the extraction process with the scope of investigating the possibility of purifying the state of a system in spite of the sources of dissipation a general framework is presented and a paradigmatic example consisting of two interacting spins immersed in a bosonic bath is studied the effectiveness of the purification scheme is discussed in terms of purity for different values of the relevant parameters and in connection with the bath temperature
|
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|
[-0.1377191845353486, 0.15389895719838226, -0.0641539746158944, 0.010747029489380111, 0.02833173919740754, -0.15045426650774768, 0.028630583318267275, 0.3354711966304522, -0.2319539700143246, -0.2671707368701593, 0.07859208361818067, -0.2674708066624589, -0.1092460143877866, 0.18611588342011803, -0.02053218401205312, 0.058658298524682725, 0.04659830986444528, 0.05858968395882079, -0.039421523192787494, -0.24279815916411784, 0.35006863539446287, 0.07305331320417786, 0.2849191354374246, 0.04055728254671623, 0.1291127350155471, -0.0022809221538611585, 0.0010217326764379525, 0.01106726486209987, -0.08553574952429699, 0.08711901444823728, 0.265080826641982, 0.08683604893222865, 0.2882026269952702, -0.4112689493275765, -0.2444113120469006, 0.12632581984184477, 0.12022263414756809, 0.1478025491806976, -0.071754337184959, -0.2655385695139153, 0.03127050492589155, -0.2016386599603316, -0.14063149089148888, -0.06907730857427749, 0.03028308046891147, -0.01573176818621707, -0.2350263147430572, 0.04709111745857323, 0.07032136361198758, 0.034586452523298145, -0.021392748413038336, -0.06395883084607906, 0.02267999862669967, 0.14667480099402988, 0.008420146066984872, -0.015863786904244788, 0.12295005381545504, -0.12823624118593419, -0.11668390652630478, 0.3996361207553289, -0.06443841339852144, -0.21720033947430137, 0.23912641531367423, -0.10962621455109911, -0.1327889833547589, 0.09351070641746952, 0.15171501241598484, 0.12116365181848071, -0.1968261560832616, 0.07516946741816355, -0.009305402385911698, 0.14377648731129333, 0.0025102259112625485, 0.09452144246258992, 0.2120463985581106, 0.21213760501106865, 0.017705868142204255, 0.22092813022108101, -0.06146464320934481, -0.1378434481549549, -0.28823980555817896, -0.1790746348625463, -0.18381312617485593, 0.04533743693577384, -0.011591053795604643, -0.10399082984036391, 0.416824054922952, 0.16271412995411083, 0.17577027737732148, -0.05901132296922798, 0.2930450383961822, 0.10596787483357023, 0.05785623750610588, 0.036257636277393125, 0.2681413882916483, 0.1514808816783544, 0.06538547786638244, -0.2453387503095049, 0.08260062713331233, 0.026287813462355796]
|
706.2112
|
Kloosterman sums, elliptic curves, and irreducible polynomials with
prescribed trace and norm
|
Let $\F_q$ ($q=p^r$) be a finite field. In this paper the number of
irreducible polynomials of degree $m$ in $\F_q[x]$ with prescribed trace and
norm coefficients is calculated in certain special cases and a general bound
for that number is obtained improving the bound by Wan if $m$ is small compared
to $q$. As a corollary, sharp bounds are obtained for the number of elements in
$\F_{q^3}$ with prescribed trace and norm over $\F_q$ improving the estimates
by Katz in this special case. Moreover, a characterization of Kloosterman sums
over $\F_{2^r}$ divisible by three is given generalizing the earlier result by
Charpin, Helleseth, and Zinoviev obtained only in the case $r$ odd. Finally, a
new simple proof for the value distribution of a Kloosterman sum over the field
$\F_{3^r}$, first proved by Katz and Livne, is given.
|
math.NT math.CO
|
let f_q qpr be a finite field in this paper the number of irreducible polynomials of degree m in f_qx with prescribed trace and norm coefficients is calculated in certain special cases and a general bound for that number is obtained improving the bound by wan if m is small compared to q as a corollary sharp bounds are obtained for the number of elements in f_q3 with prescribed trace and norm over f_q improving the estimates by katz in this special case moreover a characterization of kloosterman sums over f_2r divisible by three is given generalizing the earlier result by charpin helleseth and zinoviev obtained only in the case r odd finally a new simple proof for the value distribution of a kloosterman sum over the field f_3r first proved by katz and livne is given
|
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|
[-0.17718648559393307, 0.10837788219899214, -0.0509765279271318, -0.005915346107726423, -0.023851117632790086, -0.13772697924800656, 0.0123754250448923, 0.27834498547428455, -0.24582194576984928, -0.2830380861277637, 0.07443451655597207, -0.24296056523727363, -0.11033864108407322, 0.2517209774985745, -0.11204790863763157, 0.01786438995794229, 0.021012710927821258, 0.10206106114749085, -0.06892847068357856, -0.34311682669281524, 0.32101864638902683, 0.012338996979558621, 0.1817009975133902, 0.07570948329863741, 0.050376199911732006, 0.058847251346592466, -0.032591923893264985, 0.009584677940745892, -0.15471821018993925, 0.12100959702750996, 0.269961442812072, 0.08333406951415408, 0.26605188639094945, -0.3318057240651208, -0.17677524125696542, 0.19327084876610623, 0.15822819489746026, -0.0016224217970910318, -0.01732353604508235, -0.238115531133885, 0.1503781587097739, -0.17171556116109593, -0.15102179002989194, -0.04762932464398224, 0.08368862932719126, 0.07547801246127005, -0.35061440040247843, 0.028355107543414786, 0.09255742425311302, 0.12588039801031461, -0.04125761475092184, -0.20768059693834992, 0.028168234152390677, 0.05872451391769573, 0.02668815084753613, 0.08876070470004753, -0.003808312463875422, -0.09730708290932372, -0.07395052129183621, 0.3188209140481537, -0.10528315284575322, -0.2050703838809996, 0.051840336603002954, -0.18665302239755607, -0.11960862284896019, 0.1158698887019829, 0.10465176511549062, 0.1701966618078158, -0.039241097779321374, 0.17194488736833377, -0.1623411172459943, 0.06830739279736436, 0.16381072932648855, -0.009568713807418723, 0.08465319491712281, 0.03015736472683356, 0.09600055251212325, 0.14185578052060652, 0.02536107671296443, -0.009703829319572406, -0.3355041680693188, -0.159716086647891, -0.2523908242155277, 0.11008951640585163, -0.147632715284892, -0.11016114373085335, 0.3650842884226757, 0.03170841993928394, 0.2053426079390406, 0.15685982279041233, 0.23962879490436, 0.12906744383765137, 0.03499704442904605, 0.10621794806459495, 0.12718142287271536, 0.22736069045255564, 7.815703643513295e-05, -0.12724539649891942, 0.0459493246556068, 0.18400711715837723]
|
706.2113
|
A family of acyclic functors
|
We determine a family of functors from a poset to abelian groups such that
the higher direct limits vanish on them. This is done by first characterizing
the projective functors. Then a spectral sequence arising from the grading of
the poset is used. Also the dual version for injective functors and higher
inverse limits is included. Graded posets include simplicial complexes,
subdivision categories and simplex-like posets.
|
math.AT
|
we determine a family of functors from a poset to abelian groups such that the higher direct limits vanish on them this is done by first characterizing the projective functors then a spectral sequence arising from the grading of the poset is used also the dual version for injective functors and higher inverse limits is included graded posets include simplicial complexes subdivision categories and simplexlike posets
|
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|
[-0.09650391786161697, 0.05061080744207808, -0.03910958981423667, 0.15278465193907984, -0.14498819543443847, -0.09234753556577771, -0.0007199626680548218, 0.38080357156242384, -0.43919252502647316, -0.19293457240035589, 0.12628682888338738, -0.20339691721407385, -0.119547303138075, 0.1447220748205754, -0.1863626892551441, -0.08011501493941371, 0.05373692023920629, 0.06518295912467169, -0.05070427280258049, -0.2526621288253051, 0.4826831200696302, -0.012092075028428526, 0.2366090158395695, 0.052586167246441946, 0.10526040894205146, -0.016222368763533956, -0.07408756766270733, 0.03957972987413858, -0.2005502519690102, 0.13506571647259547, 0.3302830605005676, 0.06513090914990188, 0.14804559172482573, -0.3482410880370122, -0.05344497020158804, 0.22630171518716397, 0.12145695999038941, 0.050164653013008785, 0.0004721481624680261, -0.28758636046426767, 0.09488940085143302, -0.22305632070602963, -0.07090244639072228, -0.04287665114371163, 0.05942630053808292, 0.03385990664758014, -0.267257145690647, -0.06656339043922455, 0.10590814665016351, 0.14919567187175606, -0.039410249696988045, -0.13291684686290947, -0.1322897796123994, 0.10956240027691379, -0.09331252405800941, -0.017799857136031442, 0.12747605037028817, -0.08905910137180013, -0.1962672462475232, 0.40009601452567783, -0.046498982800227226, -0.21954696070910854, 0.1356571132994511, -0.16860154456684762, -0.1883566028819504, 0.2033147239690703, 0.004588902236498667, 0.18179041429451018, -0.01804460757270907, 0.16496099933636177, -0.13629879669822526, 0.05787328592586247, 0.12855746666195267, 0.01794205499446076, 0.13811674003602203, 0.13178822580216962, 0.05247372360617825, 0.18697235755848163, 0.03805540578931951, 0.023038947728998733, -0.3230320315977389, -0.16769494121950684, -0.09976768752941015, 0.08001284970139916, -0.12034450491950283, -0.1519868327198889, 0.37517828993837943, 0.13229750041765245, 0.15462828829891584, 0.18519024780923218, 0.25025278976130666, 0.05534699004298697, 0.1259073448847189, -0.0733135328839787, 0.1157715585731873, 0.26978414263364603, -0.041563700891636086, -0.0732005638225625, -0.007254114092299433, 0.29129937682018586]
|
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