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15.2k
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⌀ | doi
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stringlengths 39
44.4k
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
4,900 |
1708.02027
|
Janos Polonyi
|
Janos Polonyi
|
Stability and causality of multi-local theories
|
final version, to appear in Eur. Phys. Lett
| null |
10.1209/0295-5075/120/40005
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The regularized theories are non-local at the scale of the cutoff, leading so
to the usual difficulties of non-local theories. In this work the conservation
laws and causality are investigated for classical field theories with
multi-cluster action. The conservation laws are found to play a less
significant role than in local theories because due to the non-locality the
conserved quantities are not integrals of the motion, and they can exist even
without underlying symmetries. Moreover, the conservation of the energy can not
prevent instability brought about by the unbounded nature of the energy from
below. Hence a sufficient condition of stability is lost. Theories, obtained by
appropriate point splitting of local interactions are shown to be causal
thereby a necessary condition of stability can be retained.
|
[{'version': 'v1', 'created': 'Mon, 7 Aug 2017 08:09:46 GMT'}
{'version': 'v2', 'created': 'Mon, 5 Feb 2018 15:12:38 GMT'}]
|
2018-03-14
|
[array(['Polonyi', 'Janos', ''], dtype=object)]
|
4,901 |
0812.1041
|
Ana Maria Hidalgo-G\'amez
|
A.M. Hidalgo-Gamez (ESFM-IPN, Mexico) and D. Ramirez-Fuentes (IA-UNAM,
Mexico)
|
Metallicity determination in gas-rich galaxies with semiempirical
methods
|
26 pages, 9 figures and 2 tables. To appear at AJ, January 2009
| null |
10.1088/0004-6256/137/1/169
| null |
astro-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A study of the precision of the semiempirical methods used in the
determination of the chemical abundances in gas-rich galaxies is carried out.
In order to do this the oxygen abundances of a total of 438 galaxies were
determined using the electronic temperature, the $R_{23}$ and the P methods.
The new calibration of the P method gives the smaller dispersion for the low
and high metallicity regions, while the best numbers in the turnaround region
are given by the $R_{23}$ method. We also found that the dispersion correlates
with the metallicity. Finally, it can be said that all the semiempirical
methods studied here are quite insensitive to metallicity with a value of
$8.0\pm0.2$ dex for more than 50% of the total sample.
\keywords{ISM: abundances; (ISM): H {\sc ii} regions}
|
[{'version': 'v1', 'created': 'Thu, 4 Dec 2008 22:38:29 GMT'}]
|
2009-11-13
|
[array(['Hidalgo-Gamez', 'A. M.', '', 'ESFM-IPN, Mexico'], dtype=object)
array(['Ramirez-Fuentes', 'D.', '', 'IA-UNAM,\n Mexico'], dtype=object)]
|
4,902 |
2212.02777
|
George Batzios
|
Jay Armas, Giorgos Batzios, Jan Pieter van der Schaar
|
Holographic duals of the $\mathcal{N}=1$* gauge theory
|
v1: 38 pages, 4 figures containing 9 plots
|
JHEP 04 (2023) 021
|
10.1007/JHEP04(2023)021
| null |
hep-th
|
http://creativecommons.org/licenses/by/4.0/
|
We use the long-wavelength effective theory of black branes (blackfold
approach) to perturbatively construct holographic duals of the vacua of the
$\mathcal{N}=1$* supersymmetric gauge theory. Employing the mechanism of
Polchinski and Strassler, we consider wrapped black five-brane probes with
D3-brane charge moving in the perturbative supergravity backgrounds
corresponding to the high and low temperature phases of the gauge theory. Our
approach recovers the results for the brane potentials and equilibrium
configurations known in the literature in the extremal limit, while away from
extremality we find metastable black D3-NS5 configurations with horizon
topology $\mathbb{R}^3\times \mathbb{S}^2\times\mathbb{S}^3$ in certain regimes
of parameter space, which cloak potential brane singularities. We uncover novel
features of the phase diagram of the $\mathcal{N}=1$* gauge theory in different
ensembles and provide further evidence for the appearance of metastable states
in holographic backgrounds dual to confining gauge theories.
|
[{'version': 'v1', 'created': 'Tue, 6 Dec 2022 06:16:55 GMT'}]
|
2023-04-26
|
[array(['Armas', 'Jay', ''], dtype=object)
array(['Batzios', 'Giorgos', ''], dtype=object)
array(['van der Schaar', 'Jan Pieter', ''], dtype=object)]
|
4,903 |
1101.3319
|
Luke Barnes
|
Luke A. Barnes, Martin G. Haehnelt, Edoardo Tescari and Matteo Viel
|
Galactic Winds and Extended Lya Emission from the Host Galaxies of High
Column Density QSO Absorption Systems
|
16 pages, 9 figures. Submitted to MNRAS on 20th Dec, 2010
| null |
10.1111/j.1365-2966.2011.18789.x
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present 3D resonant radiative transfer simulations of the spatial and
spectral diffusion of the Lya radiation from a central source in the host
galaxies of high column density absorption systems at z ~ 3. The radiative
transfer simulations are based on a suite of cosmological galaxy formation
simulations that reproduce a wide range of observed properties of damped Lya
absorption systems. The Lya emission is predicted to be spatially extended up
to several arcsec, and the spectral width of the Lya emission is broadened to
several hundred (in some case more than thousand) km/s. The distribution and
the dynamical state of the gas in the simulated galaxies is complex, the latter
with significant contributions from rotation and both in- and out-flows. The
emerging Lya radiation extends to gas with column densities of N_HI ~ 10^{18}
cm^{-2} and its spectral shape varies strongly with viewing angle. The strong
dependence on the central \hi column density and the HI velocity field suggests
that the Lya emission will also vary strongly with time on timescales of a few
dynamical times of the central region. Such variations with time should be
especially pronounced at times where the host galaxy undergoes a major merger
and/or starburst. Depending on the pre-dominance of in- or out-flow along a
given sightline and the central column density, the spectra show prominent blue
peaks, red peaks or double-peaked profiles. Both spatial distribution and
spectral shape are very sensitive to details of the galactic wind
implementation. Stronger galactic winds result in more spatially extended Lya
emission and - somewhat counterintuitively - a narrower spectral distribution.
|
[{'version': 'v1', 'created': 'Mon, 17 Jan 2011 21:00:04 GMT'}]
|
2015-05-27
|
[array(['Barnes', 'Luke A.', ''], dtype=object)
array(['Haehnelt', 'Martin G.', ''], dtype=object)
array(['Tescari', 'Edoardo', ''], dtype=object)
array(['Viel', 'Matteo', ''], dtype=object)]
|
4,904 |
2306.03087
|
Sarah Libanore
|
Sarah Libanore, Michele Liguori, Alvise Raccanelli
|
Signatures of primordial black holes in gravitational wave clustering
|
39 pages, 17 figures, 4 tables. Prepared for submission to JCAP.
Comments are welcomed
| null | null | null |
astro-ph.CO
|
http://creativecommons.org/licenses/by/4.0/
|
The possible existence of primordial black holes (PBHs) is an open question
in modern cosmology. Among the probes to test it, gravitational waves (GW)
coming from their mergers constitute a powerful tool. In this work, we study
how stellar mass PBH binaries could affect measurements of the clustering of
merger events in future GW surveys. We account for PBH binaries formed both in
the early and late Universe and show that the power spectrum modification they
introduce can be detected at $\sim 2\sigma-3\sigma$ (depending on some
assumptions) whenever PBH mergers make up at least $\sim 60\%$ of the overall
number of detected events. By adding cross-correlations with galaxy surveys,
this threshold is lowered to $\sim 40\%$. In the case of a poor redshift
determination of GW sources, constraints are degraded by about a factor of 2.
Assuming a theoretical model for the PBH merger rate, we can convert our
results to constraints on the fraction of dark matter in PBHs, $f_{\rm PBH}$.
Finally, we perform a Bayesian model selection forecast and confirm that the
analysis we develop could be able to detect $\sim30M_\odot$ PBHs if they
account for $f_{\rm PBH}\sim 10^{-4}-10^{-3}$, depending on the model
uncertainty considered, being thus competitive with other probes.
|
[{'version': 'v1', 'created': 'Mon, 5 Jun 2023 17:58:15 GMT'}]
|
2023-06-06
|
[array(['Libanore', 'Sarah', ''], dtype=object)
array(['Liguori', 'Michele', ''], dtype=object)
array(['Raccanelli', 'Alvise', ''], dtype=object)]
|
4,905 |
1106.1210
|
Matthias Beilicke
|
V.A. Acciari, E. Aliu, T. Arlen, T. Aune, M. Beilicke, W. Benbow, D.
Boltuch, S.M. Bradbury, J.H. Buckley, V. Bugaev, K. Byrum, A. Cannon, A.
Cesarini, L. Ciupik, W. Cui, R. Dickherber, C. Duke, A. Falcone, J.P. Finley,
G. Finnegan, L. Fortson, A. Furniss, N. Galante, D. Gall, G.H. Gillanders, S.
Godambe, J. Grube, R. Guenette, G. Gyuk, D. Hanna, J. Holder, C.M. Hui, T.B.
Humensky, A. Imran, P. Kaaret, N. Karlsson, M. Kertzman, D. Kieda, A.
Konopelko, H. Krawczynski, F. Krennrich, M.J. Lang, G. Maier, S. McArthur, M.
McCutcheon, P. Moriarty, R.A. Ong, A.N. Otte, M. Ouellette, D. Pandel, J.S.
Perkins, A. Pichel, M. Pohl, J. Quinn, K. Ragan, L.C. Reyes, P.T. Reynolds,
E. Roache, H.J. Rose, A.C. Rovero, M. Schroedter, G.H. Sembroski, G. Demet
Senturk, D. Steele, S.P. Swordy, M. Theiling, S. Thibadeau, A. Varlotta, V.V.
Vassiliev, S. Vincent, R.G. Wagner, S.P. Wakely, J.E. Ward, T.C. Weekes, A.
Weinstein, T. Weisgarber, D.A. Williams, S. Wissel, M. Wood, B. Zitzer, A.
Garson, K. Lee, A.C. Sadun, M. Carini, D. Barnaby, K. Cook, J. Maune, A.
Pease, S. Smith, R. Walters, A. Berdyugin, E. Lindfors, K. Nilsson, M.
Pasanen, J. Sainio, A. Sillanpaa, L.O. Takalo, C. Villforth, T. Montaruli, M.
Baker, A. Lahteenmaki, M. Tornikoski, T. Hovatta, E. Nieppola, H.D. Aller,
and M.F. Aller
|
TeV and Multi-wavelength Observations of Mrk 421 in 2006-2008
|
30 pages, 12 figures, accepted by ApJ
|
ApJ, 738, 25 (2011)
|
10.1088/0004-637X/738/1/25
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report on TeV gamma-ray observations of the blazar Mrk 421 (redshift of
0.031) with the VERITAS observatory and the Whipple 10m Cherenkov telescope.
The excellent sensitivity of VERITAS allowed us to sample the TeV gamma-ray
fluxes and energy spectra with unprecedented accuracy where Mrk 421 was
detected in each of the pointings. A total of 47.3 hrs of VERITAS and 96 hrs of
Whipple 10m data were acquired between January 2006 and June 2008. We present
the results of a study of the TeV gamma-ray energy spectra as a function of
time, and for different flux levels. On May 2nd and 3rd, 2008, bright TeV
gamma-ray flares were detected with fluxes reaching the level of 10 Crab. The
TeV gamma-ray data were complemented with radio, optical, and X-ray
observations, with flux variability found in all bands except for the radio
waveband. The combination of the RXTE and Swift X-ray data reveal spectral
hardening with increasing flux levels, often correlated with an increase of the
source activity in TeV gamma-rays. Contemporaneous spectral energy
distributions were generated for 18 nights, each of which are reasonably
described by a one-zone SSC model.
|
[{'version': 'v1', 'created': 'Mon, 6 Jun 2011 22:25:30 GMT'}
{'version': 'v2', 'created': 'Thu, 9 Jun 2011 19:39:29 GMT'}]
|
2011-08-12
|
[array(['Acciari', 'V. A.', ''], dtype=object)
array(['Aliu', 'E.', ''], dtype=object)
array(['Arlen', 'T.', ''], dtype=object)
array(['Aune', 'T.', ''], dtype=object)
array(['Beilicke', 'M.', ''], dtype=object)
array(['Benbow', 'W.', ''], dtype=object)
array(['Boltuch', 'D.', ''], dtype=object)
array(['Bradbury', 'S. M.', ''], dtype=object)
array(['Buckley', 'J. H.', ''], dtype=object)
array(['Bugaev', 'V.', ''], dtype=object)
array(['Byrum', 'K.', ''], dtype=object)
array(['Cannon', 'A.', ''], dtype=object)
array(['Cesarini', 'A.', ''], dtype=object)
array(['Ciupik', 'L.', ''], dtype=object)
array(['Cui', 'W.', ''], dtype=object)
array(['Dickherber', 'R.', ''], dtype=object)
array(['Duke', 'C.', ''], dtype=object)
array(['Falcone', 'A.', ''], dtype=object)
array(['Finley', 'J. P.', ''], dtype=object)
array(['Finnegan', 'G.', ''], dtype=object)
array(['Fortson', 'L.', ''], dtype=object)
array(['Furniss', 'A.', ''], dtype=object)
array(['Galante', 'N.', ''], dtype=object)
array(['Gall', 'D.', ''], dtype=object)
array(['Gillanders', 'G. H.', ''], dtype=object)
array(['Godambe', 'S.', ''], dtype=object)
array(['Grube', 'J.', ''], dtype=object)
array(['Guenette', 'R.', ''], dtype=object)
array(['Gyuk', 'G.', ''], dtype=object)
array(['Hanna', 'D.', ''], dtype=object)
array(['Holder', 'J.', ''], dtype=object)
array(['Hui', 'C. M.', ''], dtype=object)
array(['Humensky', 'T. B.', ''], dtype=object)
array(['Imran', 'A.', ''], dtype=object)
array(['Kaaret', 'P.', ''], dtype=object)
array(['Karlsson', 'N.', ''], dtype=object)
array(['Kertzman', 'M.', ''], dtype=object)
array(['Kieda', 'D.', ''], dtype=object)
array(['Konopelko', 'A.', ''], dtype=object)
array(['Krawczynski', 'H.', ''], dtype=object)
array(['Krennrich', 'F.', ''], dtype=object)
array(['Lang', 'M. J.', ''], dtype=object)
array(['Maier', 'G.', ''], dtype=object)
array(['McArthur', 'S.', ''], dtype=object)
array(['McCutcheon', 'M.', ''], dtype=object)
array(['Moriarty', 'P.', ''], dtype=object)
array(['Ong', 'R. A.', ''], dtype=object)
array(['Otte', 'A. N.', ''], dtype=object)
array(['Ouellette', 'M.', ''], dtype=object)
array(['Pandel', 'D.', ''], dtype=object)
array(['Perkins', 'J. S.', ''], dtype=object)
array(['Pichel', 'A.', ''], dtype=object)
array(['Pohl', 'M.', ''], dtype=object)
array(['Quinn', 'J.', ''], dtype=object)
array(['Ragan', 'K.', ''], dtype=object)
array(['Reyes', 'L. C.', ''], dtype=object)
array(['Reynolds', 'P. T.', ''], dtype=object)
array(['Roache', 'E.', ''], dtype=object)
array(['Rose', 'H. J.', ''], dtype=object)
array(['Rovero', 'A. C.', ''], dtype=object)
array(['Schroedter', 'M.', ''], dtype=object)
array(['Sembroski', 'G. H.', ''], dtype=object)
array(['Senturk', 'G. Demet', ''], dtype=object)
array(['Steele', 'D.', ''], dtype=object)
array(['Swordy', 'S. P.', ''], dtype=object)
array(['Theiling', 'M.', ''], dtype=object)
array(['Thibadeau', 'S.', ''], dtype=object)
array(['Varlotta', 'A.', ''], dtype=object)
array(['Vassiliev', 'V. V.', ''], dtype=object)
array(['Vincent', 'S.', ''], dtype=object)
array(['Wagner', 'R. G.', ''], dtype=object)
array(['Wakely', 'S. P.', ''], dtype=object)
array(['Ward', 'J. E.', ''], dtype=object)
array(['Weekes', 'T. C.', ''], dtype=object)
array(['Weinstein', 'A.', ''], dtype=object)
array(['Weisgarber', 'T.', ''], dtype=object)
array(['Williams', 'D. A.', ''], dtype=object)
array(['Wissel', 'S.', ''], dtype=object)
array(['Wood', 'M.', ''], dtype=object)
array(['Zitzer', 'B.', ''], dtype=object)
array(['Garson', 'A.', ''], dtype=object)
array(['Lee', 'K.', ''], dtype=object)
array(['Sadun', 'A. C.', ''], dtype=object)
array(['Carini', 'M.', ''], dtype=object)
array(['Barnaby', 'D.', ''], dtype=object)
array(['Cook', 'K.', ''], dtype=object)
array(['Maune', 'J.', ''], dtype=object)
array(['Pease', 'A.', ''], dtype=object)
array(['Smith', 'S.', ''], dtype=object)
array(['Walters', 'R.', ''], dtype=object)
array(['Berdyugin', 'A.', ''], dtype=object)
array(['Lindfors', 'E.', ''], dtype=object)
array(['Nilsson', 'K.', ''], dtype=object)
array(['Pasanen', 'M.', ''], dtype=object)
array(['Sainio', 'J.', ''], dtype=object)
array(['Sillanpaa', 'A.', ''], dtype=object)
array(['Takalo', 'L. O.', ''], dtype=object)
array(['Villforth', 'C.', ''], dtype=object)
array(['Montaruli', 'T.', ''], dtype=object)
array(['Baker', 'M.', ''], dtype=object)
array(['Lahteenmaki', 'A.', ''], dtype=object)
array(['Tornikoski', 'M.', ''], dtype=object)
array(['Hovatta', 'T.', ''], dtype=object)
array(['Nieppola', 'E.', ''], dtype=object)
array(['Aller', 'H. D.', ''], dtype=object)
array(['Aller', 'M. F.', ''], dtype=object)]
|
4,906 |
2011.06203
|
Peter Schweitzer
|
S.Bastami, A.V.Efremov, P.Schweitzer, O.V.Teryaev, P.Zavada
|
Structure of the nucleon at leading and subleading twist in the
covariant parton model
|
20 pages, 6 figures
|
Phys. Rev. D 103, 014024 (2021)
|
10.1103/PhysRevD.103.014024
| null |
hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
The covariant parton model is generalized to describe quark correlators in a
systematic way. Previous results are reproduced for the T-even leading-twist
transverse momentum dependent parton distribution functions (TMDs), and for the
first time all T-even twist-3 TMDs are evaluated in this model. We apply the
approach to evaluate the fully unintegrated quark correlator which allows us to
understand the model-specific relations between different TMDs. We verify the
consistency of the approach, present numerical results and compare to available
TMD parametrizations.
|
[{'version': 'v1', 'created': 'Thu, 12 Nov 2020 05:05:12 GMT'}]
|
2021-02-03
|
[array(['Bastami', 'S.', ''], dtype=object)
array(['Efremov', 'A. V.', ''], dtype=object)
array(['Schweitzer', 'P.', ''], dtype=object)
array(['Teryaev', 'O. V.', ''], dtype=object)
array(['Zavada', 'P.', ''], dtype=object)]
|
4,907 |
1506.07577
|
Gilbert Bernstein
|
Gilbert Louis Bernstein, Chinmayee Shah, Crystal Lemire, Zachary
DeVito, Matthew Fisher, Philip Levis, Pat Hanrahan
|
Ebb: A DSL for Physical Simulation on CPUs and GPUs
| null | null | null | null |
cs.GR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Designing programming environments for physical simulation is challenging
because simulations rely on diverse algorithms and geometric domains. These
challenges are compounded when we try to run efficiently on heterogeneous
parallel architectures. We present Ebb, a domain-specific language (DSL) for
simulation, that runs efficiently on both CPUs and GPUs. Unlike previous DSLs,
Ebb uses a three-layer architecture to separate (1) simulation code, (2)
definition of data structures for geometric domains, and (3) runtimes
supporting parallel architectures. Different geometric domains are implemented
as libraries that use a common, unified, relational data model. By structuring
the simulation framework in this way, programmers implementing simulations can
focus on the physics and algorithms for each simulation without worrying about
their implementation on parallel computers. Because the geometric domain
libraries are all implemented using a common runtime based on relations, new
geometric domains can be added as needed, without specifying the details of
memory management, mapping to different parallel architectures, or having to
expand the runtime's interface.
We evaluate Ebb by comparing it to several widely used simulations,
demonstrating comparable performance to hand-written GPU code where available,
and surpassing existing CPU performance optimizations by up to 9$\times$ when
no GPU code exists.
|
[{'version': 'v1', 'created': 'Wed, 24 Jun 2015 22:32:41 GMT'}
{'version': 'v2', 'created': 'Sun, 17 Jan 2016 02:25:31 GMT'}
{'version': 'v3', 'created': 'Wed, 24 Feb 2016 23:42:30 GMT'}]
|
2016-02-26
|
[array(['Bernstein', 'Gilbert Louis', ''], dtype=object)
array(['Shah', 'Chinmayee', ''], dtype=object)
array(['Lemire', 'Crystal', ''], dtype=object)
array(['DeVito', 'Zachary', ''], dtype=object)
array(['Fisher', 'Matthew', ''], dtype=object)
array(['Levis', 'Philip', ''], dtype=object)
array(['Hanrahan', 'Pat', ''], dtype=object)]
|
4,908 |
2108.04050
|
Vasilis Oikonomou
|
V.K. Oikonomou
|
Power-Law $f(R)$ Gravity Corrected Canonical Scalar Field Inflation
|
AoP Accepted
| null |
10.1016/j.aop.2021.168576
| null |
gr-qc astro-ph.CO hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The effective inflationary Lagrangian is a prominent challenge for
theoretical cosmologists, since it may contain imprints of the quantum epoch.
In view of the fact that higher order curvature terms might be present in the
effective inflationary Lagrangian, in this work we introduce the theoretical
framework of power-law $f(R)$ gravity corrected canonical scalar field
inflation, aiming to study the inflationary dynamics of this new framework. The
main characteristic of this new theoretical framework is the dominance of a
power-law $f(R)$ gravity term $\sim R^n$, with $1<n<2$, compared to the
Einstein-Hilbert term $\sim R$. In effect, the field equations are controlled
by the $R^n$ term in contrast to the Einstein-Hilbert canonical scalar theory.
We extract the slow-roll field equations and we calculate the slow-roll indices
of the resulting theory which acquire quite elegant final form, when the
slow-roll conditions hold true. Accordingly, we examine quantitatively the
inflationary phenomenological implications of the theoretical framework we
introduced, by choosing simple hybrid-like scalar field potentials. As we
evince the resulting theory is in good agreement with the latest Planck data
for a wide range of the free parameters of the model. Thus our theoretical
framework makes possible to obtain viable inflationary theories, which
otherwise would be non-viable, such as the simple power-law $f(R)$ gravity
model or the simple power-law scalar model.
|
[{'version': 'v1', 'created': 'Mon, 9 Aug 2021 14:02:52 GMT'}]
|
2021-09-15
|
[array(['Oikonomou', 'V. K.', ''], dtype=object)]
|
4,909 |
2304.14315
|
Porfirio Leandro Le\'on \'Alvarez
|
Porfirio L. Le\'on \'Alvarez
|
Classifying spaces for families of abelian subgroups of braid groups,
RAAGs and graphs of abelian groups
|
17 pages, 1 figure
| null | null | null |
math.GR math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Given a group $G$ and an integer $n\geq 0$ we consider the family
$\mathcal{F}_n$ of all virtually abelian subgroups of $G$ of rank at most $n$.
In this article we prove that for each $n\ge2$ the Bredon cohomology, with
respect to the family $\mathcal{F}_n$, of a free abelian group with rank $k >
n$ is nontrivial in dimension $k+n$; this answers a question of Corob-Cook,
Moreno, Nucinkis and Pasini. As an application, we compute the minimal
dimension of a classifying space for the family $\mathcal{F}_n$ for braid
groups, right-angled Artin groups, and graphs of groups whose vertex groups are
infinite finitely generated virtually abelian groups, for all $n\ge2$. The main
tools that we use are the Mayer-Vietoris sequence for Bredon cohomology,
Bass-Serre theory, and the L\"uck-Weiermann construction.
|
[{'version': 'v1', 'created': 'Thu, 27 Apr 2023 16:35:35 GMT'}]
|
2023-04-28
|
[array(['Álvarez', 'Porfirio L. León', ''], dtype=object)]
|
4,910 |
1812.11328
|
Yusuke Yoshiyasu
|
Yusuke Yoshiyasu, Ryusuke Sagawa, Ko Ayusawa, Akihiko Murai
|
Skeleton Transformer Networks: 3D Human Pose and Skinned Mesh from
Single RGB Image
|
ACCV conference
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we present Skeleton Transformer Networks (SkeletonNet), an
end-to-end framework that can predict not only 3D joint positions but also 3D
angular pose (bone rotations) of a human skeleton from a single color image.
This in turn allows us to generate skinned mesh animations. Here, we propose a
two-step regression approach. The first step regresses bone rotations in order
to obtain an initial solution by considering skeleton structure. The second
step performs refinement based on heatmap regressor using a 3D pose
representation called cross heatmap which stacks heatmaps of xy and zy
coordinates. By training the network using the proposed 3D human pose dataset
that is comprised of images annotated with 3D skeletal angular poses, we showed
that SkeletonNet can predict a full 3D human pose (joint positions and bone
rotations) from a single image in-the-wild.
|
[{'version': 'v1', 'created': 'Sat, 29 Dec 2018 10:22:14 GMT'}]
|
2019-01-01
|
[array(['Yoshiyasu', 'Yusuke', ''], dtype=object)
array(['Sagawa', 'Ryusuke', ''], dtype=object)
array(['Ayusawa', 'Ko', ''], dtype=object)
array(['Murai', 'Akihiko', ''], dtype=object)]
|
4,911 |
quant-ph/9805032
|
Giacomo Mauro D'Ariano
|
G. M. D'Ariano and L. Maccone (Dipartimento di Fisica ``A. Volta'',
Pavia, Italy)
|
Measuring quantum optical Hamiltonians
|
Accepted for publication on Phys. Rev. Lett. 8 eps figures, 4
two-column pages in REVTEX
|
Phys.Rev.Lett. 80 (1998) 5465-5468
|
10.1103/PhysRevLett.80.5465
| null |
quant-ph
| null |
We show how recent state-reconstruction techniques can be used to determine
the Hamiltonian of an optical device that evolves the quantum state of
radiation. A simple experimental setup is proposed for measuring the
Liouvillian of phase-insensitive devices. The feasibility of the method with
current technology is demonstrated on the basis of Monte Carlo simulated
experiments.
|
[{'version': 'v1', 'created': 'Mon, 11 May 1998 14:25:50 GMT'}]
|
2009-10-31
|
[array(["D'Ariano", 'G. M.', '',
"Dipartimento di Fisica ``A. Volta'',\n Pavia, Italy"],
dtype=object)
array(['Maccone', 'L.', '',
"Dipartimento di Fisica ``A. Volta'',\n Pavia, Italy"],
dtype=object) ]
|
4,912 |
1006.3992
|
Timothy White
|
Timothy R. White, Brendon J. Brewer, Timothy R. Bedding, Dennis
Stello, Hans Kjeldsen
|
A comparison of Bayesian and Fourier methods for frequency determination
in asteroseismology
|
11 pages, 8 figures, accepted for publication in Communications in
Asterosesimology
| null |
10.1553/cia161s39
| null |
astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Bayesian methods are becoming more widely used in asteroseismic analysis. In
particular, they are being used to determine oscillation frequencies, which are
also commonly found by Fourier analysis. It is important to establish whether
the Bayesian methods provide an improvement on Fourier methods. We compare,
using simulated data, the standard iterative sine-wave fitting method against a
Markov Chain Monte Carlo (MCMC) code that has been introduced to infer purely
the frequencies of oscillation modes (Brewer et al. 2007). A uniform prior
probability distribution function is used for the MCMC method. We find the
methods do equally well at determining the correct oscillation frequencies,
although the Bayesian method is able to highlight the possibility of a
misidentification due to aliasing, which can be useful. In general, we suggest
that the least computationally intensive method is preferable.
|
[{'version': 'v1', 'created': 'Mon, 21 Jun 2010 06:17:00 GMT'}]
|
2015-05-19
|
[array(['White', 'Timothy R.', ''], dtype=object)
array(['Brewer', 'Brendon J.', ''], dtype=object)
array(['Bedding', 'Timothy R.', ''], dtype=object)
array(['Stello', 'Dennis', ''], dtype=object)
array(['Kjeldsen', 'Hans', ''], dtype=object)]
|
4,913 |
1901.04503
|
Jacopo Ghiglieri
|
Jacopo Ghiglieri and Urs Achim Wiedemann
|
Thermal width of the Higgs boson in hot QCD matter
|
5 pages plus appendices. v2: minor modifications, version accepted
for publication in PRD
|
Phys. Rev. D 99, 054002 (2019)
|
10.1103/PhysRevD.99.054002
|
CERN-TH-2019-003
|
hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Following Caron-Huot and combining results for the thermal dependence of
spectral functions at large time-like momenta, we write an explicit expression
for the thermal width of the Higgs boson to $\mathcal{O}(\alpha_\mathrm{s})$
for $T \ll M_H$. It is an $\mathcal{O}( \alpha_\mathrm{s} (T/M_H)^4 )$
correction for $H\to gg$ and $H\to q\bar{q}$. We also compile corresponding
results for the thermal width of the $Z$-boson, and we recall which generic
structures of the field theory, accessible via the operator product expansion,
fix the $T/M$-dependence of the decay of heavy particles.
|
[{'version': 'v1', 'created': 'Mon, 14 Jan 2019 19:00:03 GMT'}
{'version': 'v2', 'created': 'Tue, 26 Feb 2019 15:54:30 GMT'}]
|
2019-03-11
|
[array(['Ghiglieri', 'Jacopo', ''], dtype=object)
array(['Wiedemann', 'Urs Achim', ''], dtype=object)]
|
4,914 |
2007.16055
|
Samuel Walsh
|
Robin Ming Chen, Samuel Walsh, Miles H. Wheeler
|
Large-amplitude internal fronts in two-fluid systems
|
This is a shorter description of results first appearing in
arXiv:2005.00651 with additional motivation and connections to modeling
| null |
10.5802/crmath.128
| null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this announcement, we report results on the existence of families of
large-amplitude internal hydrodynamic bores. These are traveling front
solutions of the full two-phase incompressible Euler equation in two
dimensions. The fluids are bounded above and below by flat horizontal walls and
acted upon by gravity. We obtain continuous curves of solutions to this system
that bifurcate from the trivial solution where the interface is flat. Following
these families to the their extreme, the internal interface either overturns,
comes into contact with the upper wall, or develops a highly degenerate "double
stagnation" point.
Our construction is made possible by a new abstract machinery for global
continuation of monotone front-type solutions to elliptic equations posed on
infinite cylinders. This theory is quite robust and, in particular, can treat
fully nonlinear equations as well as quasilinear problems with transmission
boundary conditions.
|
[{'version': 'v1', 'created': 'Fri, 31 Jul 2020 13:14:20 GMT'}]
|
2021-07-30
|
[array(['Chen', 'Robin Ming', ''], dtype=object)
array(['Walsh', 'Samuel', ''], dtype=object)
array(['Wheeler', 'Miles H.', ''], dtype=object)]
|
4,915 |
1604.07656
|
Ece Yetkin Celikel
|
Ece Yetkin Celikel
|
On (k,n)-closed submodules
| null | null | null | null |
math.AC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let R be a commutative ring with unity and M be an R- module In this paper we
introduce semi n- absorbing and (k, n)-closed submodules of modules over
commutative rings, and investigate their basic properties.
|
[{'version': 'v1', 'created': 'Tue, 26 Apr 2016 12:44:50 GMT'}]
|
2016-04-27
|
[array(['Celikel', 'Ece Yetkin', ''], dtype=object)]
|
4,916 |
1307.4425
|
Duncan Christie
|
Duncan Christie, Phil Arras, and Zhi-Yun Li
|
H\alpha\ Absorption in Transiting Exoplanet Atmospheres
| null | null |
10.1088/0004-637X/772/2/144
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Absorption of stellar H\alpha\ by the upper atmosphere of the planet
HD189733b has recently been detected by Jensen et al. Motivated by this
observation, we have developed a model for atomic hydrogen in the n=2 state and
compared the resulting H\alpha\ line profile to the observations. The model
atmosphere is in hydrostatic balance, as well as thermal and photoionization
equilibrium. Collisional and radiative transitions are included in the
determination of the n=2 state level population. We find that H\alpha\
absorption is dominated by an optical depth \tau\ ~ 1 shell, composed of
hydrogen in the metastable 2s state that is located below the hydrogen
ionization layer. The number density of the 2s state within the shell is found
to vary slowly with radius, while that of the 1s state falls rapidly. Thus
while the Ly\alpha absorption, for a certain wavelength, occurs inside a
relatively well defined impact parameter, the contribution to H\alpha\
absorption is roughly uniform over the entire atomic hydrogen layer. The model
can approximately reproduce the observed Ly\alpha\ and H\alpha\ integrated
transit depths for HD189733b by using an ionization rate enhanced over that
expected for the star by an order of magnitude. For HD 209458b, we are unable
to explain the asymmetric H\alpha\ line profile observed by Jensen et al., as
the model produces a symmetric line profile with transit depth comparable to
that of HD 189733b. In an appendix, we study the effect of the stellar
Ly\alpha\ absorption on the net cooling rate.
|
[{'version': 'v1', 'created': 'Tue, 16 Jul 2013 20:59:42 GMT'}]
|
2015-06-16
|
[array(['Christie', 'Duncan', ''], dtype=object)
array(['Arras', 'Phil', ''], dtype=object)
array(['Li', 'Zhi-Yun', ''], dtype=object)]
|
4,917 |
1206.6528
|
Aleksandrs Belovs
|
Aleksandrs Belovs and Robert Spalek
|
Adversary Lower Bound for the k-sum Problem
|
10 pages, minor changes in v2. Extended and simplified version of an
earlier preprint of one of the authors arXiv:1204.5074
| null | null | null |
quant-ph cs.CC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove a tight quantum query lower bound $\Omega(n^{k/(k+1)})$ for the
problem of deciding whether there exist $k$ numbers among $n$ that sum up to a
prescribed number, provided that the alphabet size is sufficiently large.
This is an extended and simplified version of an earlier preprint of one of
the authors arXiv:1204.5074.
|
[{'version': 'v1', 'created': 'Wed, 27 Jun 2012 21:41:47 GMT'}
{'version': 'v2', 'created': 'Thu, 9 Aug 2012 20:32:04 GMT'}]
|
2012-08-13
|
[array(['Belovs', 'Aleksandrs', ''], dtype=object)
array(['Spalek', 'Robert', ''], dtype=object)]
|
4,918 |
1807.01199
|
Lars Simon
|
Lars Simon
|
A Homogeneous Function Constant along the Leaves of a Foliation
|
13 pages
| null | null | null |
math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Given a smooth foliation by complex curves (locally around a point
$x\in\mathbb{C}^2\setminus\{0\}$) which is "compatible" with the foliation by
spheres centered at the origin, we construct a smooth real-valued function $g$
in a neighborhood of said point, which is positive, homogeneous and constant
along the leaves. A corollary we obtain from this is relevant to the problem of
"bumping out" certain pseudoconvex domains in $\mathbb{C}^3$.
|
[{'version': 'v1', 'created': 'Tue, 3 Jul 2018 14:15:40 GMT'}]
|
2018-07-04
|
[array(['Simon', 'Lars', ''], dtype=object)]
|
4,919 |
2004.02136
|
Nicolo' Savioli
|
Nicol\`o Savioli
|
One-shot screening of potential peptide ligands on HR1 domain in
COVID-19 glycosylated spike (S) protein with deep siamese network
|
11 pages, 5 figures, 1 Table, added reference, revisited the
introduction
| null | null | null |
q-bio.QM cs.LG
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
The novel coronavirus (2019-nCoV) has been declared to be a new international
health emergence and no specific drug has been yet identified. Several methods
are currently being evaluated such as protease and glycosylated spike (S)
protein inhibitors, that outlines the main fusion site among coronavirus and
host cells. Notwithstanding, the Heptad Repeat 1 (HR1) domain on the
glycosylated spike (S) protein is the region with less mutability and then the
most encouraging target for new inhibitors drugs.The novelty of the proposed
approach, compared to others, lies in a precise training of a deep neural
network toward the 2019-nCoV virus. Where a Siamese Neural Network (SNN) has
been trained to distingue the whole 2019-nCoV protein sequence amongst two
different viruses family such as HIV-1 and Ebola. In this way, the present deep
learning system has precise knowledge of peptide linkage among 2019-nCoV
protein structure and differently, of other works, is not trivially trained on
public datasets that have not been provided any ligand-peptide information for
2019-nCoV. Suddenly, the SNN shows a sensitivity of $83\%$ of peptide affinity
classification, where $3027$ peptides on SATPdb bank have been tested towards
the specific region HR1 of 2019-nCoV exhibiting an affinity of $93\%$ for the
peptidyl-prolyl cis-trans isomerase (PPIase) peptide. This affinity between
PPIase and HR1 can open new horizons of research since several scientific
papers have already shown that CsA immunosuppression drug, a main inhibitor of
PPIase, suppress the reproduction of different CoV virus included SARS-CoV and
MERS-CoV. Finally, to ensure the scientific reproducibility, code and data have
been made public at the following link: https://github.com/bionick87/2019-nCoV
|
[{'version': 'v1', 'created': 'Sun, 5 Apr 2020 09:35:41 GMT'}
{'version': 'v2', 'created': 'Tue, 7 Apr 2020 16:07:15 GMT'}
{'version': 'v3', 'created': 'Sat, 11 Apr 2020 09:23:54 GMT'}]
|
2020-04-14
|
[array(['Savioli', 'Nicolò', ''], dtype=object)]
|
4,920 |
1506.07421
|
Grigory Papayanov
|
Grigory Papayanov
|
Cohomological properties of Hermitian symplectic threefolds
|
8 pages
| null | null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A Hermitian symplectic manifold is a complex manifold endowed with a
symplectic form $\omega$, for which the bilinear form $\omega(I\cdot,\cdot)$ is
positive definite. In this work we prove $dd^c$-lemma for 1- and (1,1)-forms
for compact Hermitian symplectic manifolds of dimension 3. This shows that
Albanese map for such manifolds is well-defined and allows one to prove
K\"ahlerness if the dimension of the Albanese image of a manifold is maximal.
|
[{'version': 'v1', 'created': 'Wed, 24 Jun 2015 15:24:55 GMT'}]
|
2015-06-25
|
[array(['Papayanov', 'Grigory', ''], dtype=object)]
|
4,921 |
2303.03111
|
Noam Zilberstein
|
Noam Zilberstein, Derek Dreyer, Alexandra Silva
|
Outcome Logic: A Unifying Foundation for Correctness and Incorrectness
Reasoning
| null |
Proc. ACM Program. Lang. 7, OOPSLA1, Article 93 (April 2023)
|
10.1145/3586045
| null |
cs.LO cs.PL
|
http://creativecommons.org/licenses/by/4.0/
|
Program logics for bug-finding (such as the recently introduced Incorrectness
Logic) have framed correctness and incorrectness as dual concepts requiring
different logical foundations. In this paper, we argue that a single unified
theory can be used for both correctness and incorrectness reasoning. We present
Outcome Logic (OL), a novel generalization of Hoare Logic that is both monadic
(to capture computational effects) and monoidal (to reason about outcomes and
reachability). OL expresses true positive bugs, while retaining correctness
reasoning abilities as well. To formalize the applicability of OL to both
correctness and incorrectness, we prove that any false OL specification can be
disproven in OL itself. We also use our framework to reason about new types of
incorrectness in nondeterministic and probabilistic programs. Given these
advances, we advocate for OL as a new foundational theory of correctness and
incorrectness.
|
[{'version': 'v1', 'created': 'Mon, 6 Mar 2023 13:21:35 GMT'}
{'version': 'v2', 'created': 'Fri, 10 Mar 2023 19:41:19 GMT'}]
|
2023-03-14
|
[array(['Zilberstein', 'Noam', ''], dtype=object)
array(['Dreyer', 'Derek', ''], dtype=object)
array(['Silva', 'Alexandra', ''], dtype=object)]
|
4,922 |
hep-ph/0604184
|
Elena G. Ferreiro
|
A. Capella and E. G. Ferreiro
|
Elliptic Flow in a Final State Interaction Model
|
4 pages, 6 figures, proceedings of XLIst Rencontres de Moriond: QCD
and Hadronic Interactions at high energy
| null | null | null |
hep-ph
| null |
We propose a final state interaction model to describe the fixed $p_T$
suppression of the yield of particles at all values of $p_T$. We make an
extension of the model to the motion in the transverse plane which introduces a
dependence of the suppression on the azimuthal angle $\theta_R$. We obtain
values of the elliptic flow $v_{2}$ close to the experimental ones for all
values of $p_T$.
|
[{'version': 'v1', 'created': 'Fri, 21 Apr 2006 17:28:29 GMT'}]
|
2007-05-23
|
[array(['Capella', 'A.', ''], dtype=object)
array(['Ferreiro', 'E. G.', ''], dtype=object)]
|
4,923 |
2204.11927
|
Derya Malak
|
Derya Malak
|
Fractional Graph Coloring for Functional Compression with Side
Information
|
Note: The author fully agrees with the independent set-based
definition in Theorem 21.2 in "Network Information Theory", El Gamal and Kim
| null | null | null |
cs.IT math.IT
|
http://creativecommons.org/publicdomain/zero/1.0/
|
We describe a rational approach to reduce the computational and communication
complexities of lossless point-to-point compression for computation with side
information. The traditional method relies on building a characteristic graph
with vertices representing the source symbols and with edges that assign a
source symbol to a collection of independent sets to be distinguished for the
exact recovery of the function. Our approach uses fractional coloring for a
b-fold coloring of characteristic graphs to provide a linear programming
relaxation to the traditional coloring method and achieves coding at a
fine-grained granularity. We derive the fundamental lower bound for
compression, given by the fractional characteristic graph entropy, through
generalizing the notion of K\"orner's graph entropy. We demonstrate the coding
gains of fractional coloring over traditional coloring via a computation
example. We conjecture that the integrality gap between fractional coloring and
traditional coloring approaches the smallest b that attains the fractional
chromatic number to losslessly represent the independent sets for a given
characteristic graph, up to a linear scaling which is a function of the
fractional chromatic number.
|
[{'version': 'v1', 'created': 'Mon, 25 Apr 2022 19:03:52 GMT'}
{'version': 'v2', 'created': 'Sun, 5 Jun 2022 14:09:44 GMT'}]
|
2022-06-07
|
[array(['Malak', 'Derya', ''], dtype=object)]
|
4,924 |
1802.09236
|
Adili Aiyiti
|
Adili Aiyiti, Shiqian Hu, Chengru Wang, Qing Xi, Zhaofang Cheng,
Minggang Xia, Yanling Ma, Jianbo Wu, Jie Guo, Qilang Wang, Jun Zhou, Jie
Chen, Xiangfan Xu and Baowen Li
|
Thermal Conductivity of Suspended Few-Layer MoS2
|
16 pages, 4 figures, Published in Nanoscale, 2018,10, 2727-2734 See
this page http://pubs.rsc.org/en/content/articlepdf/2018/nr/c7nr07522g
|
Nanoscale, 2018, 10, 2727
|
10.1039/c7nr07522g
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Modifying phonon thermal conductivity in nanomaterials is important not only
for fundamental research but also for practical applications. However, the
experiments on tailoring the thermal conductivity in nanoscale, especially in
two-dimensional materials, are rare due to technical challenges. In this work,
we demonstrate in-situ thermal conduction measurement of MoS2 and find that its
thermal conductivity can be continuously tuned to a required value from
crystalline to amorphous limits. The reduction of thermal conductivity is
understood from phonon-defects scatterings that decrease the phonon
transmission coefficient. Beyond a threshold, a sharp drop in thermal
conductivity is observed, which is believed to be a crystalline-amorphous
transition. Our method and results provide guidance for potential applications
in thermoelectrics, photoelectronics, and energy harvesting where thermal
management is critical with further integration and miniaturization.
|
[{'version': 'v1', 'created': 'Mon, 26 Feb 2018 10:29:22 GMT'}]
|
2018-02-27
|
[array(['Aiyiti', 'Adili', ''], dtype=object)
array(['Hu', 'Shiqian', ''], dtype=object)
array(['Wang', 'Chengru', ''], dtype=object)
array(['Xi', 'Qing', ''], dtype=object)
array(['Cheng', 'Zhaofang', ''], dtype=object)
array(['Xia', 'Minggang', ''], dtype=object)
array(['Ma', 'Yanling', ''], dtype=object)
array(['Wu', 'Jianbo', ''], dtype=object)
array(['Guo', 'Jie', ''], dtype=object)
array(['Wang', 'Qilang', ''], dtype=object)
array(['Zhou', 'Jun', ''], dtype=object)
array(['Chen', 'Jie', ''], dtype=object)
array(['Xu', 'Xiangfan', ''], dtype=object)
array(['Li', 'Baowen', ''], dtype=object)]
|
4,925 |
1510.05999
|
Yuri Bonder
|
Yuri Bonder and Carlos A. Escobar
|
Dynamical ambiguities in models with spontaneous Lorentz violation
|
Replaced to match the published version. 5 pages
|
Phys. Rev. D 93, 025020 (2016)
|
10.1103/PhysRevD.93.025020
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Spontaneous Lorentz violation is a viable mechanism to look for Planck scale
physics. In this work, we study spontaneous Lorentz violation models, in flat
spacetime, where a vector field produces such a violation and matter is modeled
by a complex scalar field. We show that it is possible to construct a Hamilton
density for which the evolution respects the dynamical constraints. However, we
also find that the initial data, as required by standard field theory, does not
determine the fields evolution in a unique way. In addition, we present some
examples where the physical effects of such ambiguities can be recognized. As a
consequence, the proposals in which the electromagnetic and gravitational
interactions emerge from spontaneous Lorentz violation are challenged.
|
[{'version': 'v1', 'created': 'Tue, 20 Oct 2015 18:17:22 GMT'}
{'version': 'v2', 'created': 'Mon, 25 Jan 2016 15:50:15 GMT'}]
|
2016-01-26
|
[array(['Bonder', 'Yuri', ''], dtype=object)
array(['Escobar', 'Carlos A.', ''], dtype=object)]
|
4,926 |
1105.6252
|
Gerald Feigenson
|
Frederick A. Heberle and Gerald W. Feigenson
|
Finite Phase-separation FRET I: A quantitative model valid for bilayer
nanodomains
|
25 pages, 5 figures
| null | null | null |
cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Multicomponent lipid mixtures exhibit complex phase behavior, including
coexistence of nanoscopic fluid phases in ternary mixtures mimicking the
composition of the outer leaflet of mammalian plasma membrane. The physical
mechanisms responsible for the small size of phase domains are unknown, due in
part to the difficulty of determining the size and lifetime distributions of
small, fleeting domains. Steady-state FRET provides information about the
spatial distribution of lipid fluorophores in a membrane, and with an
appropriate model can be used to determine the size of phase domains. Starting
from a radial distribution function for a binary hard disk fluid, we develop a
domain size-dependent model for stimulated acceptor emission. We compare the
results of the model to two similar, recently published models.
|
[{'version': 'v1', 'created': 'Tue, 31 May 2011 12:23:01 GMT'}]
|
2011-06-01
|
[array(['Heberle', 'Frederick A.', ''], dtype=object)
array(['Feigenson', 'Gerald W.', ''], dtype=object)]
|
4,927 |
2105.06599
|
Mohsen Gholami
|
Mohsen Gholami, Ahmad Rezaei, Helge Rhodin, Rabab Ward and Z. Jane
Wang
|
TriPose: A Weakly-Supervised 3D Human Pose Estimation via Triangulation
from Video
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Estimating 3D human poses from video is a challenging problem. The lack of 3D
human pose annotations is a major obstacle for supervised training and for
generalization to unseen datasets. In this work, we address this problem by
proposing a weakly-supervised training scheme that does not require 3D
annotations or calibrated cameras. The proposed method relies on temporal
information and triangulation. Using 2D poses from multiple views as the input,
we first estimate the relative camera orientations and then generate 3D poses
via triangulation. The triangulation is only applied to the views with high 2D
human joint confidence. The generated 3D poses are then used to train a
recurrent lifting network (RLN) that estimates 3D poses from 2D poses. We
further apply a multi-view re-projection loss to the estimated 3D poses and
enforce the 3D poses estimated from multi-views to be consistent. Therefore,
our method relaxes the constraints in practice, only multi-view videos are
required for training, and is thus convenient for in-the-wild settings. At
inference, RLN merely requires single-view videos. The proposed method
outperforms previous works on two challenging datasets, Human3.6M and
MPI-INF-3DHP. Codes and pretrained models will be publicly available.
|
[{'version': 'v1', 'created': 'Fri, 14 May 2021 00:46:48 GMT'}]
|
2021-05-17
|
[array(['Gholami', 'Mohsen', ''], dtype=object)
array(['Rezaei', 'Ahmad', ''], dtype=object)
array(['Rhodin', 'Helge', ''], dtype=object)
array(['Ward', 'Rabab', ''], dtype=object)
array(['Wang', 'Z. Jane', ''], dtype=object)]
|
4,928 |
0803.0335
|
Jos\'e Sabater
|
J. Sabater, S. Leon, L. Verdes-Montenegro, U. Lisenfeld, J. Sulentic,
S. Verley
|
The AMIGA sample of isolated galaxies. VII. Far-infrared and radio
continuum study of nuclear activity
|
12 pages, 5 figures, accepted for publication in A&A. v2: language
corrections
| null |
10.1051/0004-6361:20078785
| null |
astro-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a study of the nuclear activity in a well-defined sample of the
most isolated galaxies in the local Universe traced by their far-infrared (FIR)
and radio continuum emission. We use the well-known radio continuum-FIR
correlation to select radio-excess galaxies that are candidates to host an
active galactic nucleus (AGN), as well as the FIR colours to find obscured AGN
candidates. The existing information on nuclear activity in the V\'eron-Cetty
catalogue and in the NASA Extragalactic Database are also used. A final
catalogue of AGN-candidate galaxies has been produced. It contains 89 AGN
candidates and is publicly available on the AMIGA web page
(http://www.iaa.csic.es/AMIGA.html). At most ~ 1.5 % of the galaxies shows a
radio-excess with respect to the radio-FIR correlation, and this fraction even
goes down to less than 0.8 % after rejection of back/foreground sources. We
find that the fraction of FIR colour selected AGN-candidates is ~ 28 % with a
lower limit of ~ 7 %. A comparison with the results from the literature shows
that the AMIGA sample has the lowest ratio of AGN candidates, both globally and
separated into early and late types. Field galaxies as well as poor cluster and
group environments show intermediate values, while the highest rates of AGN
candidates are found in the central parts of clusters and in pair/merger
dominated samples. We conclude that the environment plays a crucial and direct
role in triggering radio nuclear activity and not only via the
density-morphology relation. Isolated, early-type galaxies show a particularly
low level of activity at radio wavelengths hence constituting the most
nurture-free population of luminous early-type galaxies.
|
[{'version': 'v1', 'created': 'Mon, 3 Mar 2008 21:44:40 GMT'}
{'version': 'v2', 'created': 'Wed, 23 Apr 2008 13:53:19 GMT'}]
|
2009-11-13
|
[array(['Sabater', 'J.', ''], dtype=object)
array(['Leon', 'S.', ''], dtype=object)
array(['Verdes-Montenegro', 'L.', ''], dtype=object)
array(['Lisenfeld', 'U.', ''], dtype=object)
array(['Sulentic', 'J.', ''], dtype=object)
array(['Verley', 'S.', ''], dtype=object)]
|
4,929 |
1501.05990
|
Paulo Shakarian
|
Jana Shakarian, Paulo Shakarian, Andrew Ruef
|
Cyber Attacks and Public Embarrassment: A Survey of Some Notable Hacks
| null | null | null | null |
cs.CY cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We hear it all too often in the media: an organization is attacked, its data,
often containing personally identifying information, is made public, and a
hacking group emerges to claim credit. In this excerpt, we discuss how such
groups operate and describe the details of a few major cyber-attacks of this
sort in the wider context of how they occurred. We feel that understanding how
such groups have operated in the past will give organizations ideas of how to
defend against them in the future.
|
[{'version': 'v1', 'created': 'Sat, 24 Jan 2015 02:35:04 GMT'}]
|
2015-01-27
|
[array(['Shakarian', 'Jana', ''], dtype=object)
array(['Shakarian', 'Paulo', ''], dtype=object)
array(['Ruef', 'Andrew', ''], dtype=object)]
|
4,930 |
2303.11441
|
Chiara Buttitta
|
C. Buttitta, E. M. Corsini, J. A. L. Aguerri, L. Coccato, L.
Costantin, V. Cuomo, V. P. Debattista, L. Morelli and A. Pizzella
|
The bar rotation rate as a diagnostic of dark matter content in the
centre of disc galaxies
|
Accepted for publication on MNRAS, 12 pages
| null |
10.1093/mnras/stad646
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the link between the bar rotation rate and dark matter content
in barred galaxies by concentrating on the cases of the lenticular galaxies
NGC4264 and NGC4277. These two gas-poor galaxies have similar morphologies,
sizes, and luminosities. But, NGC4264 hosts a fast bar, which extends to nearly
the corotation, while the bar embedded in NGC4277 is slow and falls short of
corotation. We derive the fraction of dark matter $f_{\rm DM, bar}$ within the
bar region from Jeans axisymmetric dynamical models by matching the stellar
kinematics obtained with the MUSE integral-field spectrograph and using SDSS
images to recover the stellar mass distribution. We build mass-follows-light
models as well as mass models with a spherical halo of dark matter, which is
not tied to the stars. We find that the inner regions of NGC4277 host a larger
fraction of dark matter ($f_{\rm DM, bar} = 0.53 \pm 0.02$) with respect to
NGC4264 ($f_{\rm DM, bar} = 0.33 \pm 0.04$) in agreement with the predictions
of theoretical works and the findings of numerical simulations, which have
found that fast bars live in baryon-dominated discs, whereas slow bars
experienced a strong drag from the dynamical friction due to a dense DM halo.
This is the first time that the bar rotation rate is coupled to $f_{\rm DM,
bar}$ derived from dynamical modelling.
|
[{'version': 'v1', 'created': 'Mon, 20 Mar 2023 20:37:47 GMT'}]
|
2023-03-22
|
[array(['Buttitta', 'C.', ''], dtype=object)
array(['Corsini', 'E. M.', ''], dtype=object)
array(['Aguerri', 'J. A. L.', ''], dtype=object)
array(['Coccato', 'L.', ''], dtype=object)
array(['Costantin', 'L.', ''], dtype=object)
array(['Cuomo', 'V.', ''], dtype=object)
array(['Debattista', 'V. P.', ''], dtype=object)
array(['Morelli', 'L.', ''], dtype=object)
array(['Pizzella', 'A.', ''], dtype=object)]
|
4,931 |
1909.02171
|
Marianne Heida
|
M. Heida, R.M. Lau, B. Davies, M. Brightman, F. F\"urst, B.W.
Grefenstette, J.A. Kennea, F. Tramper, D.J. Walton, and F.A. Harrison
|
Discovery of a red supergiant donor star in SN2010da/NGC 300 ULX-1
|
10 pages, 6 figures, accepted for publication in ApJ Letters
| null |
10.3847/2041-8213/ab4139
| null |
astro-ph.HE astro-ph.GA astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
SN2010da/NGC 300 ULX-1 was first detected as a supernova impostor in May 2010
and was recently discovered to be a pulsating ultraluminous X-ray source. In
this letter, we present VLT/X-shooter spectra of this source obtained in
October 2018, covering the wavelength range 350-2300 nm. The $J$- and $H$-bands
clearly show the presence of a red supergiant donor star that is best matched
by a MARCS stellar atmosphere with $T_{\rm eff} = 3650 - 3900$ K and
$\log(L_{\rm bol}/L_{\odot}) = 4.25\pm0.10$, which yields a stellar radius $R =
310 \pm 70 R_{\odot}$. To fit the full spectrum, two additional components are
required: a blue excess that can be fitted either by a hot blackbody (T
$\gtrsim 20,000$ K) or a power law (spectral index $\alpha \approx 4$) and is
likely due to X-ray emission reprocessed in the outer accretion disk or the
donor star; and a red excess that is well fitted by a blackbody with a
temperature of $\sim 1100$ K, and is likely due to warm dust in the vicinity of
SN2010da. The presence of a red supergiant in this system implies an orbital
period of at least 0.8-2.1 years, assuming Roche lobe overflow. Given the large
donor-to-compact object mass ratio, orbital modulations of the radial velocity
of the red supergiant are likely undetectable. However, the radial velocity
amplitude of the neutron star is large enough (up to 40-60 km s$^{-1}$) to
potentially be measured in the future, unless the system is viewed at a very
unfavorable inclination.
|
[{'version': 'v1', 'created': 'Thu, 5 Sep 2019 00:56:24 GMT'}]
|
2019-10-02
|
[array(['Heida', 'M.', ''], dtype=object)
array(['Lau', 'R. M.', ''], dtype=object)
array(['Davies', 'B.', ''], dtype=object)
array(['Brightman', 'M.', ''], dtype=object)
array(['Fürst', 'F.', ''], dtype=object)
array(['Grefenstette', 'B. W.', ''], dtype=object)
array(['Kennea', 'J. A.', ''], dtype=object)
array(['Tramper', 'F.', ''], dtype=object)
array(['Walton', 'D. J.', ''], dtype=object)
array(['Harrison', 'F. A.', ''], dtype=object)]
|
4,932 |
1801.05171
|
Nati Ofir
|
Nati Ofir, Shai Silberstein, Hila Levi, Dani Rozenbaum, Yosi Keller
and Sharon Duvdevani Bar
|
Deep Multi-Spectral Registration Using Invariant Descriptor Learning
| null | null |
10.1109/ICIP.2018.8451640
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we introduce a novel deep-learning method to align
cross-spectral images. Our approach relies on a learned descriptor which is
invariant to different spectra. Multi-modal images of the same scene capture
different signals and therefore their registration is challenging and it is not
solved by classic approaches. To that end, we developed a feature-based
approach that solves the visible (VIS) to Near-Infra-Red (NIR) registration
problem. Our algorithm detects corners by Harris and matches them by a
patch-metric learned on top of CIFAR-10 network descriptor. As our experiments
demonstrate we achieve a high-quality alignment of cross-spectral images with a
sub-pixel accuracy. Comparing to other existing methods, our approach is more
accurate in the task of VIS to NIR registration.
|
[{'version': 'v1', 'created': 'Tue, 16 Jan 2018 09:27:42 GMT'}
{'version': 'v2', 'created': 'Wed, 17 Jan 2018 12:01:39 GMT'}
{'version': 'v3', 'created': 'Sun, 21 Jan 2018 05:57:25 GMT'}
{'version': 'v4', 'created': 'Wed, 24 Jan 2018 11:58:09 GMT'}
{'version': 'v5', 'created': 'Thu, 8 Feb 2018 07:12:35 GMT'}
{'version': 'v6', 'created': 'Wed, 23 May 2018 07:26:34 GMT'}]
|
2021-10-06
|
[array(['Ofir', 'Nati', ''], dtype=object)
array(['Silberstein', 'Shai', ''], dtype=object)
array(['Levi', 'Hila', ''], dtype=object)
array(['Rozenbaum', 'Dani', ''], dtype=object)
array(['Keller', 'Yosi', ''], dtype=object)
array(['Bar', 'Sharon Duvdevani', ''], dtype=object)]
|
4,933 |
1806.10999
|
David Andriot
|
David Andriot
|
On the de Sitter swampland criterion
|
v2: a few clarifications made; v3: a few additions, published version
| null |
10.1016/j.physletb.2018.09.022
|
CERN-TH-2018-148
|
hep-th astro-ph.CO gr-qc hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A new swampland criterion has recently been proposed. As a consequence, it
forbids the existence of de Sitter solutions in a low energy effective theory
of a quantum gravity. However, there exist classical de Sitter solutions of
ten-dimensional (10d) type II supergravities, even though they are unstable.
This appears at first sight in contradiction with the criterion. Beyond
possible doubts on the validity of these solutions, we propose two answers to
this apparent puzzle. A first possibility is that the known 10d solutions
always exhibit an energy scale of order or higher than a Kaluza-Klein scale, as
we argue. A corresponding 4d low energy effective theory would then differ from
the usual consistent truncations, and as we explain, would not admit a de
Sitter solution. This would reconcile the existence of these 10d de Sitter
solutions with the 4d criterion. A second, alternative possibility is to have a
refined swampland criterion, that we propose. It forbids to have both the
existence and the stability of a de Sitter solution, while unstable solutions
are still allowed.
|
[{'version': 'v1', 'created': 'Thu, 28 Jun 2018 14:26:11 GMT'}
{'version': 'v2', 'created': 'Wed, 18 Jul 2018 11:46:32 GMT'}
{'version': 'v3', 'created': 'Mon, 24 Sep 2018 12:40:01 GMT'}]
|
2018-09-25
|
[array(['Andriot', 'David', ''], dtype=object)]
|
4,934 |
cs/0402040
|
Serban Vlad E.
|
Serban E. Vlad
|
Defining the Delays of the Asynchronous Circuits
| null |
CAIM 2003, Oradea, Romania, May 29-31, 2003
| null | null |
cs.LO
| null |
We define the delays of a circuit, as well as the properties of determinism,
order, time invariance, constancy, symmetry and the serial connection.
|
[{'version': 'v1', 'created': 'Tue, 17 Feb 2004 13:01:05 GMT'}]
|
2007-05-23
|
[array(['Vlad', 'Serban E.', ''], dtype=object)]
|
4,935 |
hep-ph/0512185
|
Thomas D. Cohen
|
Thomas D. Cohen and Leonid Ya. Glozman
|
A simple toy model for effective restoration of chiral symmetry in
excited hadrons
|
This is the published version of this paper. Note that the title has
changed from earlier versions as has the abstract. The emphasis is slightly
different from previous versions but the essential physical content is the
same
|
Mod.Phys.Lett. A21 (2006) 1939-1945
|
10.1142/S0217732306021360
| null |
hep-ph
| null |
A simple solvable toy model exhibiting effective restoration of chiral
symmetry in excited hadrons is constructed. A salient feature is that while
physics of the low-lying states is crucially determined by the spontaneous
breaking of chiral symmetry, in the high-lying states the effects of chiral
symmetry breaking represent only a small correction. Asymptotically the states
approach the regime where their properties are determined by the underlying
unbroken chiral symmetry.
|
[{'version': 'v1', 'created': 'Wed, 14 Dec 2005 16:04:39 GMT'}
{'version': 'v2', 'created': 'Fri, 13 Jan 2006 16:54:34 GMT'}
{'version': 'v3', 'created': 'Mon, 18 Sep 2006 12:15:44 GMT'}]
|
2009-11-11
|
[array(['Cohen', 'Thomas D.', ''], dtype=object)
array(['Glozman', 'Leonid Ya.', ''], dtype=object)]
|
4,936 |
2306.06551
|
Hritom Das
|
Hritom Das, Rocco D. Febbo, SNB Tushar, Nishith N. Chakraborty,
Maximilian Liehr, Nathaniel Cady, Garrett S. Rose
|
An Efficient and Accurate Memristive Memory for Array-based Spiking
Neural Networks
| null | null | null | null |
cs.NE cs.ET
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
Memristors provide a tempting solution for weighted synapse connections in
neuromorphic computing due to their size and non-volatile nature. However,
memristors are unreliable in the commonly used voltage-pulse-based programming
approaches and require precisely shaped pulses to avoid programming failure. In
this paper, we demonstrate a current-limiting-based solution that provides a
more predictable analog memory behavior when reading and writing memristive
synapses. With our proposed design READ current can be optimized by about 19x
compared to the 1T1R design. Moreover, our proposed design saves about 9x
energy compared to the 1T1R design. Our 3T1R design also shows promising write
operation which is less affected by the process variation in MOSFETs and the
inherent stochastic behavior of memristors. Memristors used for testing are
hafnium oxide based and were fabricated in a 65nm hybrid CMOS-memristor
process. The proposed design also shows linear characteristics between the
voltage applied and the resulting resistance for the writing operation. The
simulation and measured data show similar patterns with respect to voltage
pulse-based programming and current compliance-based programming. We further
observed the impact of this behavior on neuromorphic-specific applications such
as a spiking neural network
|
[{'version': 'v1', 'created': 'Sun, 11 Jun 2023 00:47:09 GMT'}]
|
2023-06-13
|
[array(['Das', 'Hritom', ''], dtype=object)
array(['Febbo', 'Rocco D.', ''], dtype=object)
array(['Tushar', 'SNB', ''], dtype=object)
array(['Chakraborty', 'Nishith N.', ''], dtype=object)
array(['Liehr', 'Maximilian', ''], dtype=object)
array(['Cady', 'Nathaniel', ''], dtype=object)
array(['Rose', 'Garrett S.', ''], dtype=object)]
|
4,937 |
1407.5894
|
Lorenzo Iorio
|
Lorenzo Iorio
|
Is the recently proposed Mars-sized perturber at $65-80~\textrm{AU}$
ruled out by the Cassini ranging data?
|
LaTex2e, 10 pages, no tables, 2 figures. Accepted for publication in
the Research Topic "From Comets to Pluto and Beyond: Kuiper Belt Objects and
Investigations" of Frontiers in Astronomy and Space Sciences
|
Front. Astron. Space Sci. 4:28 2017
|
10.3389/fspas.2017.00028
| null |
gr-qc astro-ph.EP physics.space-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently, the existence of a pointlike pertuber PX with
$1~m_\textrm{Mars}\lesssim m_\textrm{X}\lesssim 2.4~m_\oplus$ supposedly moving
at $65-80~\textrm{AU}$ along a moderately inclined orbit has been hypothesized
in order to explain certain features of the midplane of the Kuiper Belt Objects
(KBOs). We preliminarily selected two possible scenarios for such a PX, and
numerically simulated its effect on the Earth-Saturn range $\rho(t)$ by varying
some of its orbital parameters over a certain time span; then, we compared our
results with some existing actual range residuals. By assuming $m_\textrm{X} =
1~m_\textrm{Mars}$ and a circular orbit, such a putative new member of our
Solar System would nominally perturb $\rho(t)$ by a few km over $\Delta t =
12~\textrm{yr}~(2004-2016)$. However, the Cassini spaceraft accurately measured
$\rho(t)$ to the level of $\sigma_\rho\simeq 100~\textrm{m}$. Nonetheless, such
a scenario should not be considered as necessarily ruled out since the Cassini
data were reduced so far without explicitly modeling any PX. Indeed, a NASA JPL
team recently demonstrated that an extra-signature as large as 4 km affecting
the Kronian range would be almost completely absorbed in fitting incomplete
dynamical models, i.e. without PX itself, to such simulated data, thus not
showing up in the standard post-fit range residuals. Larger anomalous
signatures would instead occur for $m_\textrm{X} > 1~m_\textrm{Mars}$. Their
nominal} amplitude could be as large as $50-150~\textrm{km}$ for $m_\textrm{X}
= 2.4~m_\oplus$, thus making less plausible their existence.
|
[{'version': 'v1', 'created': 'Sat, 19 Jul 2014 18:37:43 GMT'}
{'version': 'v2', 'created': 'Tue, 19 Aug 2014 07:54:24 GMT'}
{'version': 'v3', 'created': 'Tue, 3 Oct 2017 14:35:30 GMT'}
{'version': 'v4', 'created': 'Wed, 4 Oct 2017 13:13:10 GMT'}]
|
2017-10-30
|
[array(['Iorio', 'Lorenzo', ''], dtype=object)]
|
4,938 |
1711.06358
|
Jesus Javier Cobos-Mart\'inez
|
J.J. Cobos-Mart\'inez, K Tsushima, G Krein, and A W Thomas
|
Partial restoration of chiral symmetry in cold nuclear matter: the
$\phi$-meson case
|
Proceedings of the XXXI Annual Meeting of the Division of Particles
and Fields of the Mexican Physical Society
|
J J Cobos-Martinez et al 2017 J. Phys.: Conf.Ser, 912 012009
| null | null |
nucl-th hep-ph nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The work presented at this workshop is divided into two parts. In the first
part, the mass and decay width of the $\phi$-meson in cold nuclear matter are
computed in an effective Lagrangian approach. The medium dependence of these
properties are obtained by evaluating kaon-antikaon loop contributions to the
$\phi$-meson self-energy, employing medium-modified kaon masses calculated
using the quark-meson coupling model. The loop integral is regularized with a
dipole form factor, and the sensitivity of the results to the choice of cutoff
mass in the form factor is investigated. At normal nuclear matter density, we
find a downward shift of the $\phi$ mass by a few percent, while the decay
width is enhanced by an order of magnitude.
Our results support the literature which suggest that one should observe a
small downward mass shift and a large broadening of the decay width. In the
second part, we present $\phi$-meson--nucleus bound state energies and
absorption widths for four selected nuclei, calculated by solving the
Klein-Gordon equation with complex optical potentials. The attractive potential
for the $\phi$-meson in the nuclear medium originates from the in-medium
enhanced KK loop in the $\phi$-meson selfenergy. The results suggest that the
$\phi$-meson should form bound states with all the nuclei considered. However,
the identification of the signal for these predicted bound states will need
careful investigation because of their sizable absorption widths.
|
[{'version': 'v1', 'created': 'Fri, 17 Nov 2017 00:10:17 GMT'}]
|
2017-11-20
|
[array(['Cobos-Martínez', 'J. J.', ''], dtype=object)
array(['Tsushima', 'K', ''], dtype=object)
array(['Krein', 'G', ''], dtype=object)
array(['Thomas', 'A W', ''], dtype=object)]
|
4,939 |
math-ph/0209025
| null |
Timur F. Kamalov
|
Generalized Hamilton Function in the Phase Space of Coordinates and
Their Multiple Derivatives
|
4 pages, LaTeX
| null | null | null |
math-ph math.MP
| null |
Refined are the known descriptions of particle behavior with the help of
Hamilton function in the phase space of coordinates and their multiple
derivatives. This entails existing of circumstances when at closer distances
gravitational effects can prove considerably more strong than in case of this
situation being calculated with the help of Hamilton function in the phase
space of coordinates and their first derivatives. For example, this may be the
case if the gravitational potential is described as a power series in 1/r. At
short distances the space metrics fluctuations may also be described by a
divergent power series; henceforth, these fluctuations at smaller distances
also constitute a power series, i.e. they are functions of 1/r. For such
functions, the average of the coordinate equals zero if the frame of reference
coincides with the point of origin.
|
[{'version': 'v1', 'created': 'Fri, 13 Sep 2002 07:44:25 GMT'}
{'version': 'v2', 'created': 'Mon, 15 May 2006 11:04:29 GMT'}]
|
2007-05-23
|
[array(['Kamalov', 'Timur F.', ''], dtype=object)]
|
4,940 |
1908.02376
|
Zahed Shahmoradi
|
Zahed Shahmoradi, Taewoo Lee
|
Quantile Inverse Optimization: Improving Stability in Inverse Linear
Programming
| null | null |
10.1287/opre.2021.2143
| null |
math.OC
|
http://creativecommons.org/licenses/by/4.0/
|
Inverse linear programming (LP) has received increasing attention due to its
potential to generate efficient optimization formulations that can closely
replicate the behavior of a complex system. However, inversely inferred
parameters and corresponding forward solutions from the existing inverse LP
method can be highly sensitive to noise, errors, and uncertainty in the input
data, limiting its applicability in data-driven settings. We introduce the
notion of inverse and forward stability in inverse LP and propose a novel
inverse LP method that determines a set of objective functions that are stable
under data imperfection and generate solutions close to the relevant subset of
the data. We formulate the inverse model as a mixed-integer program and
elucidate its connection to bi-clique problems, which we exploit to develop
efficient heuristics. We also show how this method can be used for online
learning. We numerically evaluate the stability of the proposed method and
demonstrate its practical use in the diet recommendation and transshipment
applications.
|
[{'version': 'v1', 'created': 'Tue, 6 Aug 2019 21:52:08 GMT'}
{'version': 'v2', 'created': 'Sat, 4 Jul 2020 19:35:17 GMT'}]
|
2022-02-22
|
[array(['Shahmoradi', 'Zahed', ''], dtype=object)
array(['Lee', 'Taewoo', ''], dtype=object)]
|
4,941 |
2103.15943
|
Alireza Ramezani
|
Eric Sihite, Andrew Lessieur, Pravin Dangol, Akshath Singhal, and
Alireza Ramezani
|
Orientation stabilization in a bioinspired bat-robot using integrated
mechanical intelligence and control
|
9 pages, 6 figures, accepted in Unmanned Systems Technology XXIII
(UST)
| null | null | null |
cs.RO cs.SY eess.SY
|
http://creativecommons.org/licenses/by/4.0/
|
Our goal in this work is to expand the theory and practice of robot
locomotion by addressing critical challenges associated with the robotic
biomimicry of bat aerial locomotion. Bats wings exhibit fast wing articulation
and can mobilize as many as 40 joints within a single wingbeat. Mimicking bat
flight can be a significant ordeal and the current design paradigms have failed
as they assume only closed-loop feedback roles through sensors and conventional
actuators while ignoring the computational role carried by morphology. In this
paper, we propose a design framework called Morphing via Integrated Mechanical
Intelligence and Control (MIMIC) which integrates small and low energy
actuators to control the robot through a change in morphology. In this paper,
using the dynamic model of Northeastern University's Aerobat, which is designed
to test the effectiveness of the MIMIC framework, it will be shown that
computational structures and closed-loop feedback can be successfully used to
mimic bats stable flight apparatus.
|
[{'version': 'v1', 'created': 'Mon, 29 Mar 2021 20:37:59 GMT'}]
|
2021-03-31
|
[array(['Sihite', 'Eric', ''], dtype=object)
array(['Lessieur', 'Andrew', ''], dtype=object)
array(['Dangol', 'Pravin', ''], dtype=object)
array(['Singhal', 'Akshath', ''], dtype=object)
array(['Ramezani', 'Alireza', ''], dtype=object)]
|
4,942 |
cond-mat/0312170
|
Ernesto S. Loscar
|
Ernesto S. Loscar, Rodolfo A. Borzi, Ezequiel V. Albano
|
Scaling behavior of jamming fluctuations upon random sequential
adsorption
|
8 pages, 2 figures. To appear in Eur. Phys. J. B (Rapid note) (2003)
| null |
10.1140/epjb/e2003-00329-6
| null |
cond-mat.stat-mech
| null |
It is shown that the fluctuations of the jamming coverage upon Random
Sequential Adsorption ($\sigma_{\theta_J}$), decay with the lattice size
according to the power-law $\sigma_{\theta_J} \propto L^{-1 / \nu_J}$, with
$\nu_{J} = 2 / (2D - d_f)$, where $D$ is the dimension of the substrate and
$d_{\rm f}$ is the fractal dimension of the set of sites belonging to the
substrate where the RSA process actually takes place. This result is in
excellent agreement with the figure recently reported by Vandewalle {\it et al}
({\it Eur. Phys. J.} B. {\bf 14}, 407 (2000)), namely $\nu_J = 1.0 (1)$ for the
RSA of needles with $D = 2$ and $d_f = 2$, that gives $\nu_J = 1$. Furthermore,
our prediction is in excellent agreement with different previous numerical
results. The derived relationships are also confirmed by means of extensive
numerical simulations applied to the RSA of dimers on both stochastic and
deterministic fractal substrates.
|
[{'version': 'v1', 'created': 'Fri, 5 Dec 2003 19:30:55 GMT'}]
|
2009-11-10
|
[array(['Loscar', 'Ernesto S.', ''], dtype=object)
array(['Borzi', 'Rodolfo A.', ''], dtype=object)
array(['Albano', 'Ezequiel V.', ''], dtype=object)]
|
4,943 |
2008.05511
|
Gernot Riegler
|
Gernot Riegler, Vladlen Koltun
|
Free View Synthesis
|
published at ECCV 2020, https://youtu.be/JDJPn3ZtfZs
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a method for novel view synthesis from input images that are
freely distributed around a scene. Our method does not rely on a regular
arrangement of input views, can synthesize images for free camera movement
through the scene, and works for general scenes with unconstrained geometric
layouts. We calibrate the input images via SfM and erect a coarse geometric
scaffold via MVS. This scaffold is used to create a proxy depth map for a novel
view of the scene. Based on this depth map, a recurrent encoder-decoder network
processes reprojected features from nearby views and synthesizes the new view.
Our network does not need to be optimized for a given scene. After training on
a dataset, it works in previously unseen environments with no fine-tuning or
per-scene optimization. We evaluate the presented approach on challenging
real-world datasets, including Tanks and Temples, where we demonstrate
successful view synthesis for the first time and substantially outperform prior
and concurrent work.
|
[{'version': 'v1', 'created': 'Wed, 12 Aug 2020 18:16:08 GMT'}]
|
2020-08-14
|
[array(['Riegler', 'Gernot', ''], dtype=object)
array(['Koltun', 'Vladlen', ''], dtype=object)]
|
4,944 |
1610.01808
|
Ashley Montanaro
|
Michael J. Bremner, Ashley Montanaro and Dan J. Shepherd
|
Achieving quantum supremacy with sparse and noisy commuting quantum
computations
|
23 pages, 1 figure; v4: uses standard journal style
|
Quantum 1, 8 (2017)
|
10.22331/q-2017-04-25-8
| null |
quant-ph
|
http://creativecommons.org/licenses/by/4.0/
|
The class of commuting quantum circuits known as IQP (instantaneous quantum
polynomial-time) has been shown to be hard to simulate classically, assuming
certain complexity-theoretic conjectures. Here we study the power of IQP
circuits in the presence of physically motivated constraints. First, we show
that there is a family of sparse IQP circuits that can be implemented on a
square lattice of n qubits in depth O(sqrt(n) log n), and which is likely hard
to simulate classically. Next, we show that, if an arbitrarily small constant
amount of noise is applied to each qubit at the end of any IQP circuit whose
output probability distribution is sufficiently anticoncentrated, there is a
polynomial-time classical algorithm that simulates sampling from the resulting
distribution, up to constant accuracy in total variation distance. However, we
show that purely classical error-correction techniques can be used to design
IQP circuits which remain hard to simulate classically, even in the presence of
arbitrary amounts of noise of this form. These results demonstrate the
challenges faced by experiments designed to demonstrate quantum supremacy over
classical computation, and how these challenges can be overcome.
|
[{'version': 'v1', 'created': 'Thu, 6 Oct 2016 10:38:52 GMT'}
{'version': 'v2', 'created': 'Thu, 13 Apr 2017 15:12:25 GMT'}
{'version': 'v3', 'created': 'Tue, 18 Apr 2017 18:44:07 GMT'}
{'version': 'v4', 'created': 'Fri, 21 Apr 2017 12:50:01 GMT'}]
|
2017-04-26
|
[array(['Bremner', 'Michael J.', ''], dtype=object)
array(['Montanaro', 'Ashley', ''], dtype=object)
array(['Shepherd', 'Dan J.', ''], dtype=object)]
|
4,945 |
math/0703644
|
Sean Sather-Wagstaff
|
Sean Sather-Wagstaff and Tirdad Sharif and Diana White
|
Stability of Gorenstein Categories
|
21 pages, uses XY-pic. Version 2 contains corrected proofs of Lemma
2.1 and Theorem 4.8
| null |
10.1112/jlms/jdm124
| null |
math.AC math.RA
| null |
We show that an iteration of the procedure used to define the Gorenstein
projective modules over a commutative ring $R$ yields exactly the Gorenstein
projective modules. Specifically, given an exact sequence of Gorenstein
projective $R$-modules
$G=...\xra{\partial^G_2}G_1\xra{\partial^G_1}G_0\xra{\partial^G_0} ...$ such
that the complexes $\Hom_R(G,H)$ and $\Hom_R(H,G)$ are exact for each
Gorenstein projective $R$-module $H$, the module $\coker(\partial^G_1)$ is
Gorenstein projective. The proof of this result hinges upon our analysis of
Gorenstein subcategories of abelian categories.
|
[{'version': 'v1', 'created': 'Wed, 21 Mar 2007 19:44:02 GMT'}
{'version': 'v2', 'created': 'Thu, 21 Jun 2007 23:35:15 GMT'}]
|
2014-02-26
|
[array(['Sather-Wagstaff', 'Sean', ''], dtype=object)
array(['Sharif', 'Tirdad', ''], dtype=object)
array(['White', 'Diana', ''], dtype=object)]
|
4,946 |
2101.01107
|
Thomas Curtright
|
T. Curtright and S. Subedi
|
Potentials versus Geometry
| null | null | null | null |
quant-ph math-ph math.MP
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
We discuss some equivalence relations between the non-relativistic quantum
mechanics for particles subjected to potentials and for particles moving freely
on background geometries. In particular, we illustrate how selected geometries
can be used to regularize singular potentials.
|
[{'version': 'v1', 'created': 'Mon, 4 Jan 2021 17:31:48 GMT'}]
|
2021-01-05
|
[array(['Curtright', 'T.', ''], dtype=object)
array(['Subedi', 'S.', ''], dtype=object)]
|
4,947 |
2109.10278
|
Francisco Munoz
|
E. Flores, Jose D. Mella, E. Aparicio, R. I. Gonzalez, C. Parra, E. M.
Bringa and F. Munoz
|
Inducing a topological transition in graphene nanoribbons superlattices
by external strain
| null | null |
10.1039/D2CP00038E
| null |
cond-mat.mes-hall cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Armchair graphene nanoribbons, when forming a superlattice, can be classified
in different topological phases, with or without edge states. By means of
tight-binding and classical molecular dynamics (MD) simulations, we studied the
electronic and mechanical properties of some of these superlattices. MD shows
that fracture in modulated superlattices is brittle, as for unmodulated
ribbons, and that occurs at the thinner regions, with staggered superlattices
achieving a larger fracture strain. We found a general mechanism to induce a
topological transition with strain, related to the electronic properties of
each segment of the superlattice, and by studying the sublattice polarization
we were able to characterize the transition and the response of these states to
the strain. For the cases studied in detail here, the topological transition
occurred at $\sim$3-5 \% strain, well below the fracture strain. The
topological states of the superlattice -- if present -- are robust to strain
even close to fracture. Unlike the zero-energy edge states found in the zig-zag
edges of graphene nanoribbons, the superlattice states shows signatures of
being particularly insensitive to disorder, even in real space.
|
[{'version': 'v1', 'created': 'Tue, 21 Sep 2021 15:58:19 GMT'}]
|
2022-04-06
|
[array(['Flores', 'E.', ''], dtype=object)
array(['Mella', 'Jose D.', ''], dtype=object)
array(['Aparicio', 'E.', ''], dtype=object)
array(['Gonzalez', 'R. I.', ''], dtype=object)
array(['Parra', 'C.', ''], dtype=object)
array(['Bringa', 'E. M.', ''], dtype=object)
array(['Munoz', 'F.', ''], dtype=object)]
|
4,948 |
2004.05320
|
Saijun Wu
|
Yudi Ma, Xing Huang, Xiaoqing Wang, Lingjing Ji, Yizun He, Liyang Qiu,
Jian Zhao, Yuzhuo Wang, Saijun Wu
|
Precise pulse shaping for quantum control of strong optical transitions
|
11 pages, 6 figures
| null |
10.1364/OE.389700
| null |
physics.atom-ph physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Advances of quantum control technology have led to nearly perfect
single-qubit control of nuclear spins and atomic hyperfine ground states. In
contrast, quantum control of strong optical transitions, even for free atoms,
are far from being perfect. Developments of such quantum control appears to be
bottlenecked by available laser technology for generating isolated,
sub-nanosecond optical waveforms with sub-THz programming bandwidth. Here we
propose a simple and robust method for the desired pulse shaping, based on
precisely stacking multiple delayed picosecond pulses. Our proof-of-principal
demonstration leads to arbitrarily shapeable optical waveforms with 30~GHz
bandwidth and $100~$ps duration. We confirm the stability of the waveforms by
interfacing the pulses with laser-cooled atoms, resulting in ``super-resolved''
spectroscopic signals. This pulse shaping method may open exciting perspectives
in quantum optics, and for fast laser cooling and atom interferometry with
mode-locked lasers.
|
[{'version': 'v1', 'created': 'Sat, 11 Apr 2020 06:25:51 GMT'}]
|
2020-06-24
|
[array(['Ma', 'Yudi', ''], dtype=object)
array(['Huang', 'Xing', ''], dtype=object)
array(['Wang', 'Xiaoqing', ''], dtype=object)
array(['Ji', 'Lingjing', ''], dtype=object)
array(['He', 'Yizun', ''], dtype=object)
array(['Qiu', 'Liyang', ''], dtype=object)
array(['Zhao', 'Jian', ''], dtype=object)
array(['Wang', 'Yuzhuo', ''], dtype=object)
array(['Wu', 'Saijun', ''], dtype=object)]
|
4,949 |
2205.07015
|
Ryan Sullivan
|
Ryan Sullivan, J. K. Terry, Benjamin Black, John P. Dickerson
|
Cliff Diving: Exploring Reward Surfaces in Reinforcement Learning
Environments
|
Accepted at ICML 2022 Camera-Ready Version
| null | null | null |
cs.LG cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
Visualizing optimization landscapes has led to many fundamental insights in
numeric optimization, and novel improvements to optimization techniques.
However, visualizations of the objective that reinforcement learning optimizes
(the "reward surface") have only ever been generated for a small number of
narrow contexts. This work presents reward surfaces and related visualizations
of 27 of the most widely used reinforcement learning environments in Gym for
the first time. We also explore reward surfaces in the policy gradient
direction and show for the first time that many popular reinforcement learning
environments have frequent "cliffs" (sudden large drops in expected return). We
demonstrate that A2C often "dives off" these cliffs into low reward regions of
the parameter space while PPO avoids them, confirming a popular intuition for
PPO's improved performance over previous methods. We additionally introduce a
highly extensible library that allows researchers to easily generate these
visualizations in the future. Our findings provide new intuition to explain the
successes and failures of modern RL methods, and our visualizations concretely
characterize several failure modes of reinforcement learning agents in novel
ways.
|
[{'version': 'v1', 'created': 'Sat, 14 May 2022 09:08:29 GMT'}
{'version': 'v2', 'created': 'Tue, 17 May 2022 01:12:27 GMT'}
{'version': 'v3', 'created': 'Wed, 21 Sep 2022 15:58:34 GMT'}]
|
2022-09-22
|
[array(['Sullivan', 'Ryan', ''], dtype=object)
array(['Terry', 'J. K.', ''], dtype=object)
array(['Black', 'Benjamin', ''], dtype=object)
array(['Dickerson', 'John P.', ''], dtype=object)]
|
4,950 |
2202.01509
|
Ashot Gevorgyan
|
I.M. Efimov, N.A. Vanyushkin, A.H. Gevorgyan, S.S. Golik
|
Optical biosensor based on a photonic crystal with a defective layer
designed to determine the concentration of SARS-CoV-2 in water
|
15 pages, 13 figures
| null |
10.1088/1402-4896/ac5ff7
| null |
physics.ins-det physics.optics
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
We propose a new optical biosensor based on a photonic crystal with a defect
layer, which can determine the SARS-CoV-2 concentration in water by the defect
mode shift. Two models of the dependence of the refractive index of the defect
layer on the concentration of the pathogen in water were considered. The
optimal parameters for the photonic crystal in our device and the optimal
thickness of the defect layer were determined. It was also demonstrated that in
the presence of absorption in the investigated structure it is much more
advantageous to work in the reflection mode compared to the transmission mode.
Finally, the wavelength dependence of the defect mode on the SARS-CoV-2
concentration was obtained and the sensitivity of the sensor was determined.
|
[{'version': 'v1', 'created': 'Thu, 3 Feb 2022 10:40:14 GMT'}]
|
2022-04-27
|
[array(['Efimov', 'I. M.', ''], dtype=object)
array(['Vanyushkin', 'N. A.', ''], dtype=object)
array(['Gevorgyan', 'A. H.', ''], dtype=object)
array(['Golik', 'S. S.', ''], dtype=object)]
|
4,951 |
1512.08500
|
Marco Nardecchia
|
Florian Goertz, Jernej F. Kamenik, Andrey Katz, Marco Nardecchia
|
Indirect Constraints on the Scalar Di-Photon Resonance at the LHC
|
34 pages, 4 figures. Minor changes, version accepted in JHEP
|
JHEP 0516:187,2016
|
10.1007/JHEP05(2016)187
|
CERN-PH-TH-2015-313
|
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Motivated by the tantalizing excesses recently reported in the di-photon
invariant mass spectrum at the LHC, we scrutinize some implications of scalar
di-photon resonances in high energy proton-proton collisions. In particular,
indications of a large width impose several challenges for model building. We
show how calculability and unitarity considerations severely limit possible
perturbative realizations of such a signal and propose a simple criterion that
can be adapted to any renormalizable model. Furthermore, we discuss
correlations between a di-photon excess and precision observables, including
the anomalous magnetic and electric dipole moments of quarks and leptons,
neutral meson oscillations and radiative flavor changing neutral current
mediated decays of heavy leptons and hadrons. We find that existing searches
and measurements significantly constrain the possibilities for a scalar
resonance decaying into final states involving Standard Model fermions. We
propose future search strategies which could elucidate some remaining currently
unconstrained decay channels and discuss possible correlations between the
di-photon excess and several recently reported flavor anomalies, showing that
the latter can be addressed in a new incarnation of a gauged $U(1)^\prime$
model, with the di-photon resonance being the physical remnant of the
$U(1)^\prime$-breaking field.
|
[{'version': 'v1', 'created': 'Mon, 28 Dec 2015 20:27:26 GMT'}
{'version': 'v2', 'created': 'Thu, 28 Jan 2016 16:26:16 GMT'}
{'version': 'v3', 'created': 'Thu, 2 Jun 2016 12:59:37 GMT'}]
|
2016-11-29
|
[array(['Goertz', 'Florian', ''], dtype=object)
array(['Kamenik', 'Jernej F.', ''], dtype=object)
array(['Katz', 'Andrey', ''], dtype=object)
array(['Nardecchia', 'Marco', ''], dtype=object)]
|
4,952 |
hep-th/0606006
|
Ruth Gregory
|
Simon Creek, Ruth Gregory, Panagiota Kanti and Bina Mistry
|
Braneworld stars and black holes
|
39 pages, 15 figures
|
Class.Quant.Grav.23:6633-6658,2006
|
10.1088/0264-9381/23/23/004
|
DCPT-06/13
|
hep-th astro-ph gr-qc
| null |
We look for spherically symmetric star or black hole solutions on a
Randall-Sundrum brane from the perspective of the bulk. We take a known bulk
solution, and analyse possible braneworld trajectories within it that
correspond, from the braneworld point of view, to solutions of the brane
Tolman-Oppenheimer-Volkoff equations. Our solutions are therefore embedded
consistently into a full bulk solution. We find the full set of static
gravitating matter sources on a brane in a range of bulk spacetimes, analyzing
which can correspond to physically sensible sources. Finally, we look at
time-dependent trajectories in a Schwarzschild--anti de Sitter spacetime as
possible descriptions of time-dependent braneworld black holes, highlighting
some of the general features one might expect, as well as some of the
difficulties involved in getting a full solution to the question.
|
[{'version': 'v1', 'created': 'Thu, 1 Jun 2006 19:34:40 GMT'}]
|
2009-11-11
|
[array(['Creek', 'Simon', ''], dtype=object)
array(['Gregory', 'Ruth', ''], dtype=object)
array(['Kanti', 'Panagiota', ''], dtype=object)
array(['Mistry', 'Bina', ''], dtype=object)]
|
4,953 |
quant-ph/9907019
|
Peter Loeber
|
Peter Loeber
|
Quantum Channels and Simultaneous ID Coding
|
15 pages
| null | null | null |
quant-ph
| null |
This paper is on identification of classical information by the use of
quantum channels. We focus on simultaneous ID codes which use measurements
being useful to identify an arbitrary message. We give a direct and a converse
part of the appropriate coding theorem.
|
[{'version': 'v1', 'created': 'Tue, 6 Jul 1999 10:02:47 GMT'}]
|
2007-05-23
|
[array(['Loeber', 'Peter', ''], dtype=object)]
|
4,954 |
1604.01265
|
David Nespral
|
D. Nespral and D. Gandolfi and H. J. Deeg and L. Borsato and M. C.V
Fridlund and O. Barragan and R. Alonso and S. Grziwa and J. Korth and J.
Cabrera and Sz. Csizmadia and G. Nowak, and T. Kuutma and J. Saario and P.
Eigmuller and A. Erikson and E.W. Guenther and A. P. Hatzes and P. Montanes
Rodriguez and E. Palle and M. Patzold and J. Prieto-Arranz and H. Rauer and
D. Sebastian
|
Mass determination of K2-19b and K2-19c from radial velocities and
transit timing variations
| null | null |
10.1051/0004-6361/201628639
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present FIES@NOT, HARPS-N@TNG, and [email protected] radial velocity
follow-up observations of K2-19, a compact planetary system hosting three
planets, of which the two larger ones, namely K2-19b and K2-19c, are close to
the 3:2 mean motion resonance. An analysis considering only the radial velocity
measurements detects K2-19b, the largest and most massive planet in the system,
with a mass of $54.8\pm7.5$~M${_\oplus}$ and provides a marginal detection of
K2-19c, with a mass of M$_\mathrm{c}$=$5.9^{+7.6}_{-4.3}$ M$_\oplus$. We also
used the TRADES code to simultaneously model both our RV measurements and the
existing transit-timing measurements. We derived a mass of
$54.4\pm8.9$~M${_\oplus}$ for K2-19b and of $7.5^{+3.0}_{-1.4}$~M${_\oplus}$
for K2-19c. A prior K2-19b mass estimated by Barros et al. 2015, based
principally on a photodynamical analysis of K2-19's light-curve, is consistent
with both analysis, our combined TTV and RV analysis, and with our analysis
based purely on RV measurements. Differences remain mainly in the errors of the
more lightweight planet, driven likely by the limited precision of the RV
measurements and possibly some yet unrecognized systematics.
|
[{'version': 'v1', 'created': 'Tue, 5 Apr 2016 14:15:00 GMT'}
{'version': 'v2', 'created': 'Mon, 20 Mar 2017 11:40:46 GMT'}]
|
2017-05-31
|
[array(['Nespral', 'D.', ''], dtype=object)
array(['Gandolfi', 'D.', ''], dtype=object)
array(['Deeg', 'H. J.', ''], dtype=object)
array(['Borsato', 'L.', ''], dtype=object)
array(['Fridlund', 'M. C. V', ''], dtype=object)
array(['Barragan', 'O.', ''], dtype=object)
array(['Alonso', 'R.', ''], dtype=object)
array(['Grziwa', 'S.', ''], dtype=object)
array(['Korth', 'J.', ''], dtype=object)
array(['Cabrera', 'J.', ''], dtype=object)
array(['Csizmadia', 'Sz.', ''], dtype=object)
array(['Nowak', 'G.', ''], dtype=object)
array(['Kuutma', 'T.', ''], dtype=object)
array(['Saario', 'J.', ''], dtype=object)
array(['Eigmuller', 'P.', ''], dtype=object)
array(['Erikson', 'A.', ''], dtype=object)
array(['Guenther', 'E. W.', ''], dtype=object)
array(['Hatzes', 'A. P.', ''], dtype=object)
array(['Rodriguez', 'P. Montanes', ''], dtype=object)
array(['Palle', 'E.', ''], dtype=object)
array(['Patzold', 'M.', ''], dtype=object)
array(['Prieto-Arranz', 'J.', ''], dtype=object)
array(['Rauer', 'H.', ''], dtype=object)
array(['Sebastian', 'D.', ''], dtype=object)]
|
4,955 |
astro-ph/0602591
|
Dr Paul A. Crowther
|
L J Hadfield, P A Crowther (Sheffield)
|
How extreme are the Wolf-Rayet clusters in NGC3125?
|
12 pages, 8 figures, accepted for MNRAS (fixes previous error in
Table 2)
|
Mon.Not.Roy.Astron.Soc.368:1822-1832,2006
|
10.1111/j.1365-2966.2006.10245.x
| null |
astro-ph
| null |
We reinvestigate the massive stellar content of NGC3125 (Tol3) using
VLT/FORS1 imaging & spectroscopy, plus archival VLT/ISAAC, HST/FOC and HST/STIS
datasets. Narrow-band imaging confirms that A and B knots represent the primary
sites of Wolf-Rayet (WR) stars, whilst HST imaging reveals that both regions
host multiple clusters. Clusters A1 + A2 within region A host WR stars. altough
is not clear which cluster within region B hosts WR stars. Nebular properties
infer an LMC-like metallicity. LMC template WN5-6 & WC4 spectra are matched to
the observed optical WR bumps of A1 and B, permitting the contribution of WC
stars to the blue bump to be quantified. We obtain N(WN5-6:WC4)=105:20, 55:0,
40:20 for clusters A1, A2 and B1+B2, a factor of 3 lower than optical studies,
as a result of a lower E(B-V). Using Starburst99 models to estimate O star
populations for individual clusters, we find N(WR)/N(O)=0.2 for A1 and 0.1 for
A2 and B1+B2. From Halpha imaging, the O star content of the Giant HII regions
A and B is found to be a factor of 5-10 times higher than that derived
spectroscopically for the UV/optically bright clusters, suggesting that NGC3125
hosts optically obscured young massive clusters, further supported by VLT/ISAAC
K band imaging. Archival HST/STIS UV spectroscopy confirms the low E(B-V)
towards A1, for which we have determined an SMC extinction law, in preference
to an LMC or starburst law. We obtain N(WN5-6)=110 from the slit-loss corrected
HeII 1640 line flux, in excellent agreement with optical result. However, this
is a factor of 35 times lower than that inferred from the same dataset by
Chandar et al. due to their use of a starburst extinction law. Highly
discrepant stellar populations may result in spatially resolved star forming
regions from UV and optical studies through use of different extinction laws.
|
[{'version': 'v1', 'created': 'Mon, 27 Feb 2006 17:21:02 GMT'}
{'version': 'v2', 'created': 'Fri, 3 Mar 2006 20:07:39 GMT'}]
|
2009-11-11
|
[array(['Hadfield', 'L J', '', 'Sheffield'], dtype=object)
array(['Crowther', 'P A', '', 'Sheffield'], dtype=object)]
|
4,956 |
0809.4626
|
Erez Gershnabel
|
E. Gershnabel and I.Sh. Averbukh
|
Laser Induced Selective Alignment of Water Spin Isomers
|
6 pages, 4 figures, 3 tables
| null |
10.1103/PhysRevA.78.063416
| null |
quant-ph physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider laser alignment of ortho and para spin isomers of water molecules
by using strong and short off-resonance laser pulses. A single pulse is found
to create a distinct transient alignment and antialignment of the isomeric
species. We suggest selective alignment of one isomeric species (leaving the
other species randomly aligned) by a pair of two laser pulses.
|
[{'version': 'v1', 'created': 'Fri, 26 Sep 2008 13:31:02 GMT'}]
|
2009-11-13
|
[array(['Gershnabel', 'E.', ''], dtype=object)
array(['Averbukh', 'I. Sh.', ''], dtype=object)]
|
4,957 |
1802.00202
|
Priodyuti Pradhan
|
Priodyuti Pradhan and Sarika Jalan
|
Network construction: A learning framework through localizing principal
eigenvector
|
15 pages, 7 figures
| null | null | null |
physics.soc-ph cs.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Information of localization properties of eigenvectors of the complex network
has applicability in many different areas which include networks centrality
measures, spectral partitioning, development of approximation algorithms, and
disease spreading phenomenon. For linear dynamical process localization of
principal eigenvector (PEV) of adjacency matrices infers condensation of the
information in the smaller section of the network. For a network, an
eigenvector is said to be localized when most of its components are near to
zero with few taking very high values. Here, we provide three different
random-sampling-based algorithms which, by using the edge rewiring method, can
evolve a random network having a delocalized PEV to a network having a highly
localized PEV. In other words, we develop a learning framework to explore the
localization of PEV through a random sampling-based optimization method. We
discuss the drawbacks and advantages of these algorithms. Additionally, we show
that the construction of such networks corresponding to the highly localized
PEV is a non-convex optimization problem when the objective function is the
inverse participation ratio. This framework is also relevant to construct a
network structure for other lower-order eigenvectors.
|
[{'version': 'v1', 'created': 'Thu, 1 Feb 2018 09:18:28 GMT'}
{'version': 'v2', 'created': 'Tue, 28 Sep 2021 13:26:45 GMT'}]
|
2021-09-29
|
[array(['Pradhan', 'Priodyuti', ''], dtype=object)
array(['Jalan', 'Sarika', ''], dtype=object)]
|
4,958 |
2211.10084
|
Danan Yang
|
Danan Yang, Himani Garg, Martin Andersson
|
Numerical simulation of two-phase flow in gas diffusion layer and gas
channel of proton exchange membrane fuel cells
| null |
j.ijhydene.2023.01.013
|
10.1016/S0360-3199(23)00016-2.
| null |
physics.flu-dyn
|
http://creativecommons.org/licenses/by/4.0/
|
Liquid water within the cathode Gas Diffusion Layer (GDL) and Gas Channel
(GC) of Proton Exchange Membrane Fuel Cells (PEMFCs) is strongly coupled to gas
transport properties, thereby affecting the electrochemical conversion rates.
In this study, the GDL and GC regions are utilized as the simulation domain,
which differs from previous studies that only focused on any one of them. A
volume-of-fluid method is adopted to numerically investigate the two-phase flow
(gas and liquid) behavior, e.g., water transport pattern evolution, water
coverage ratio as well as local and total water saturation. To obtain GDL
geometries, an in-house geometry-based method is developed for GDL
reconstruction. Furthermore, to study the effect of GDL carbon fiber diameter,
the same procedure is used to reconstruct three GDL structures by varying the
carbon fiber diameter but keeping the porosity and geometric dimensions
constant. The wall wettability is introduced with static contact angles at
carbon fiber surfaces and channel walls. The results show that the GDL fiber
microstructure has a significant impact on the two-phase flow patterns in the
cathode field. Different stages of two-phase flow pattern evolution in both
cathode domains are observed. Due to the difference in wettability, the water
coverage of the GDL/GC interface is smaller than that of the channel side and
top walls. It is also found that the water saturation inside the GDLs
stabilizes after the water breakthrough, while local water saturation at the
interface keeps irregular oscillations. Last but not the least, a water
saturation balance requirement between the GDL and GC is observed. In terms of
varying fiber diameter, a larger fiber diameter would result in less water
saturation in the GDL but more water in the GC, in addition to faster water
movement throughout the total domain.
|
[{'version': 'v1', 'created': 'Fri, 18 Nov 2022 08:26:02 GMT'}]
|
2023-02-16
|
[array(['Yang', 'Danan', ''], dtype=object)
array(['Garg', 'Himani', ''], dtype=object)
array(['Andersson', 'Martin', ''], dtype=object)]
|
4,959 |
1405.6104
|
Pietro Faccioli
|
S. a Beccara, L. Fant and P. Faccioli
|
Variational Scheme to Compute Protein Reaction Pathways using Atomistic
Force Fields with Explicit Solvent
|
Accepted for publication on Phys. Rev. Lett
| null | null | null |
cond-mat.soft q-bio.BM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce a variational approximation to the microscopic dynamics of rare
conformational transitions of macromolecules. Within this framework it is
possible to simulate on a small computer cluster reactions as complex as
protein folding, using state of the art all-atom force fields in explicit
solvent. We test this method against molecular dynamics (MD) simulations of the
folding of an alpha- and a beta-protein performed with the same all-atom force
field on the Anton supercomputer. We find that our approach yields results
consistent with those of MD simulations, at a computational cost orders of
magnitude smaller.
|
[{'version': 'v1', 'created': 'Fri, 23 May 2014 15:51:32 GMT'}
{'version': 'v2', 'created': 'Wed, 18 Feb 2015 11:13:42 GMT'}]
|
2015-02-19
|
[array(['Beccara', 'S. a', ''], dtype=object)
array(['Fant', 'L.', ''], dtype=object)
array(['Faccioli', 'P.', ''], dtype=object)]
|
4,960 |
1410.0783
|
Keitaro Nagata
|
Keitaro Nagata, Kouji Kashiwa, Atsushi Nakamura, Shinsuke M. Nishigaki
|
Lee-Yang zero distribution of high temperature QCD and Roberge-Weiss
phase transition
|
11 pages, 7 figures. Accepted to Phys. Rev. D
|
Phys. Rev. D 91, 094507 (2015)
|
10.1103/PhysRevD.91.094507
|
KEK-CP-308, MSN-023
|
hep-lat hep-ex hep-ph nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Canonical partition functions and Lee-Yang zeros of QCD at finite density and
high temperature are studied. Recent lattice simulations have confirmed that
the free energy of QCD is a quartic function of quark chemical potential at
temperature slightly above pseudo-critical temperature $T_c$, as in the case
with a gas of free massless fermions.
We present analytic derivation of the canonical partition functions and
Lee-Yang zeros for this type of free energy using the saddle point
approximation. We also perform lattice QCD simulation in a canonical approach
using the fugacity expansion of the fermion determinant, and carefully examine
its reliability. By comparing the analytic and numerical results, we conclude
that the canonical partition functions follow the Gaussian distribution of the
baryon number, and the accumulation of Lee-Yang zeros of these canonical
partition functions exhibit the first-order Roberge-Weiss phase transition. We
discuss the validity and applicable range of the result and its implications
both for theoretical and experimental studies.
|
[{'version': 'v1', 'created': 'Fri, 3 Oct 2014 08:54:16 GMT'}
{'version': 'v2', 'created': 'Sat, 16 May 2015 07:36:17 GMT'}]
|
2015-05-27
|
[array(['Nagata', 'Keitaro', ''], dtype=object)
array(['Kashiwa', 'Kouji', ''], dtype=object)
array(['Nakamura', 'Atsushi', ''], dtype=object)
array(['Nishigaki', 'Shinsuke M.', ''], dtype=object)]
|
4,961 |
2102.05722
|
Helios Sanchis-Alepuz
|
Georg Herzog and H\`elios Sanchis-Alepuz
|
Neutron Stars in Palatini $R+\alpha R^2$ and $R+\alpha R^2+\beta Q$
Theories
|
13 pages, 18 figures. References added. Discussion around Fig. 18
extended. Agrees with published version
|
Eur.Phys.J.C 81 (2021) 10, 888
|
10.1140/epjc/s10052-021-09662-z
| null |
gr-qc hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
We study solutions of the stellar structure equations for spherically
symmetric objects in Palatini $f(R)=R+\alpha R^2$ and $f(R,Q)=R+\alpha
R^2+\beta Q$ in the mass-radius region associated to neutron stars. We
illustrate the potential impact of the $R^2$ and $Q$ terms by studying a range
of viable values of $\alpha$ and $\beta$. Similarly, we use different equations
of state (SLy, FPS, HS(DD2) and HS(TMA)) as a simple way to account for the
equation of state uncertainty. Our results show that for certain combinations
of the $\alpha$ and $\beta$ parameters and equation of state, the effect of
modifications of general relativity on the properties of stars is sizeable.
Therefore, with increasing accuracy in the determination of the equation of
state for neutron stars, astrophysical observations may serve as discriminators
of modifications of General Relativity.
|
[{'version': 'v1', 'created': 'Wed, 10 Feb 2021 20:07:09 GMT'}
{'version': 'v2', 'created': 'Mon, 14 Jun 2021 07:24:58 GMT'}
{'version': 'v3', 'created': 'Tue, 19 Oct 2021 06:05:57 GMT'}]
|
2021-10-20
|
[array(['Herzog', 'Georg', ''], dtype=object)
array(['Sanchis-Alepuz', 'Hèlios', ''], dtype=object)]
|
4,962 |
1903.04731
|
Youlin Li
|
Youlin Li, Motoo Tange
|
Smoothly non-isotopic Lagrangian disk fillings of Legendrian knots
|
16 pages, 22 figures
| null | null | null |
math.GT math.SG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we construct the first families of distinct Lagrangian ribbon
disks in the standard symplectic 4-ball which have the same boundary Legendrian
knots, and are not smoothly isotopic or have non-homeomorphic exteriors.
|
[{'version': 'v1', 'created': 'Tue, 12 Mar 2019 05:12:43 GMT'}
{'version': 'v2', 'created': 'Tue, 13 Oct 2020 00:57:10 GMT'}]
|
2020-10-20
|
[array(['Li', 'Youlin', ''], dtype=object)
array(['Tange', 'Motoo', ''], dtype=object)]
|
4,963 |
cond-mat/0410356
|
Menachem Tsindlekht
|
Grigory I. Leviev, Valery M. Genkin, Menachem I. Tsindlekht, Israel
Felner, Yurii B. Paderno, and Vladimir B. Filippov
|
The low-frequency response in the surface superconducting state of
ZrB$_{12}$ single crystal}
|
7 pages, 11 figures
| null |
10.1103/PhysRevB.71.064506
| null |
cond-mat.supr-con
| null |
The large nonlinear response of a single crystal ZrB$_{12}$ to an ac field
(frequency 40 - 2500 Hz) for $H_0>H_{c2}$ has been observed. Direct
measurements of the ac wave form and the exact numerical solution of the
Ginzburg-Landau equations, as well as phenomenological relaxation equation,
permit the study of the surface superconducting states dynamics. It is shown,
that the low frequency response is defined by transitions between the
metastable superconducting states under the action of an ac field. The
relaxation rate which determines such transitions dynamics, is found.
|
[{'version': 'v1', 'created': 'Thu, 14 Oct 2004 09:49:25 GMT'}]
|
2009-11-10
|
[array(['Leviev', 'Grigory I.', ''], dtype=object)
array(['Genkin', 'Valery M.', ''], dtype=object)
array(['Tsindlekht', 'Menachem I.', ''], dtype=object)
array(['Felner', 'Israel', ''], dtype=object)
array(['Paderno', 'Yurii B.', ''], dtype=object)
array(['Filippov', 'Vladimir B.', ''], dtype=object)]
|
4,964 |
1411.6181
|
Yurii V. Dumin
|
Yurii V. Dumin
|
Stark effect in the nonuniform field and its influence on the fine
structure of Rydberg blockade
|
LaTeX2e, iopart class, 14 pages, 2 EPS figures, accepted for
publication in J. Phys. B; v2: text substantially extended, 1 figure added;
v3: text substantially extended and subdivided, 1 figure and 7 references
added; v4: misprints in Eq.(4) corrected
|
J. Phys. B: At. Mol. Opt. Phys., v.48, p.135002 (2015)
|
10.1088/0953-4075/48/13/135002
| null |
physics.atom-ph physics.optics quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Splitting the energy levels of a hydrogen-like atom by the electric field
nonuniform at the atomic scale is studied. This situation is important for the
multi-level treatment of the phenomenon of Rydberg blockade [Yu.V. Dumin, J.
Phys. B, v.47, p.175502 (2014)]. An explicit formula for the energy levels is
derived. A typical value of the energy shift by the electric field gradient
turns out to be proportional to the 4th power of the principal quantum number
(i.e., the square of atomic size), as would be expected from a qualitative
consideration. Finally, the fine spatial structure of the Rydberg blockade is
analyzed when the electric-field-gradient term plays the dominant role, and the
results are confronted with the experimental data.
|
[{'version': 'v1', 'created': 'Sat, 22 Nov 2014 23:53:28 GMT'}
{'version': 'v2', 'created': 'Sat, 10 Jan 2015 23:56:10 GMT'}
{'version': 'v3', 'created': 'Thu, 9 Apr 2015 19:53:46 GMT'}
{'version': 'v4', 'created': 'Sun, 17 May 2015 02:39:20 GMT'}]
|
2015-06-02
|
[array(['Dumin', 'Yurii V.', ''], dtype=object)]
|
4,965 |
0901.0062
|
Mokshay Madiman
|
Mokshay Madiman
|
Cores of Cooperative Games in Information Theory
|
12 pages, published at
http://www.hindawi.com/GetArticle.aspx?doi=10.1155/2008/318704 in EURASIP
Journal on Wireless Communications and Networking, Special Issue on "Theory
and Applications in Multiuser/Multiterminal Communications", April 2008
|
EURASIP Journal on Wireless Communications and Networking, Volume
2008, Article ID 318704
|
10.1155/2008/318704
| null |
cs.IT cs.GT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Cores of cooperative games are ubiquitous in information theory, and arise
most frequently in the characterization of fundamental limits in various
scenarios involving multiple users. Examples include classical settings in
network information theory such as Slepian-Wolf source coding and multiple
access channels, classical settings in statistics such as robust hypothesis
testing, and new settings at the intersection of networking and statistics such
as distributed estimation problems for sensor networks. Cooperative game theory
allows one to understand aspects of all of these problems from a fresh and
unifying perspective that treats users as players in a game, sometimes leading
to new insights. At the heart of these analyses are fundamental dualities that
have been long studied in the context of cooperative games; for information
theoretic purposes, these are dualities between information inequalities on the
one hand and properties of rate, capacity or other resource allocation regions
on the other.
|
[{'version': 'v1', 'created': 'Wed, 31 Dec 2008 05:26:59 GMT'}]
|
2009-01-05
|
[array(['Madiman', 'Mokshay', ''], dtype=object)]
|
4,966 |
1005.5322
|
Lukas Hollenstein
|
Ruth Durrer, Lukas Hollenstein and Rajeev Kumar Jain
|
Can slow roll inflation induce relevant helical magnetic fields?
|
33 pages 6 figures; v4 to match the accepted version to appear in
JCAP
|
JCAP 1103 (2011) 037
|
10.1088/1475-7516/2011/03/037
| null |
astro-ph.CO gr-qc hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the generation of helical magnetic fields during single field
inflation induced by an axial coupling of the electromagnetic field to the
inflaton. During slow roll inflation, we find that such a coupling always leads
to a blue spectrum with $B^2(k) \propto k$, as long as the theory is treated
perturbatively. The magnetic energy density at the end of inflation is found to
be typically too small to backreact on the background dynamics of the inflaton.
We also show that a short deviation from slow roll does not result in strong
modifications to the shape of the spectrum. We calculate the evolution of the
correlation length and the field amplitude during the inverse cascade and
viscous damping of the helical magnetic field in the radiation era after
inflation. We conclude that except for low scale inflation with very strong
coupling, the magnetic fields generated by such an axial coupling in single
field slow roll inflation with perturbative coupling to the inflaton are too
weak to provide the seeds for the observed fields in galaxies and clusters.
|
[{'version': 'v1', 'created': 'Fri, 28 May 2010 15:49:21 GMT'}
{'version': 'v2', 'created': 'Fri, 17 Dec 2010 16:34:43 GMT'}
{'version': 'v3', 'created': 'Mon, 20 Dec 2010 15:07:59 GMT'}
{'version': 'v4', 'created': 'Mon, 21 Mar 2011 12:43:40 GMT'}]
|
2015-03-17
|
[array(['Durrer', 'Ruth', ''], dtype=object)
array(['Hollenstein', 'Lukas', ''], dtype=object)
array(['Jain', 'Rajeev Kumar', ''], dtype=object)]
|
4,967 |
0910.0325
|
Ming Lei Tong
|
Ming-Lei Tong, Yang Zhang
|
Relic Gravitational Waves with A Running Spectral Index and Its
Constraints at High Frequencies
|
17 pages, 10 figures, Accepted by PRD
|
Phys.Rev.D80:084022,2009
|
10.1103/PhysRevD.80.084022
| null |
gr-qc astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the impact of a running index $\alpha_t$ on the spectrum of relic
gravitational waves (RGWs) over the whole range of frequency $(10^{-18}\sim
10^{10})$ Hz and reveal its implications in RGWs detections and in cosmology.
Analytical calculations show that, although the spectrum of RGWs on low
frequencies is less affected by $\alpha_t\ne 0$, but, on high frequencies, the
spectrum is modified substantially. Investigations are made toward potential
detections of the $\alpha_t$-modified RGWs for several kinds of current and
planned detectors. The Advanced LIGO will likely be able to detect RGWs with
$\alpha_t\ge 0$ for inflationary models with the inflation index $\beta=-1.956$
and the tensor-scalar ratio $r= 0.55$. The future LISA can detect RGWs for a
much broader range of ($\alpha_t$, $\beta$, $r$), and will have a better chance
to break a degeneracy between them. Constraints on $\alpha_t$ are estimated
from several detections and cosmological observations. Among them, the most
stringent one is from the bound of the Big Bang nucleosynthesis (BBN), and
requires $\alpha_t < 0.008$ rather conservatively for any reasonable ($\beta$,
$r$), preferring a nearly power-law spectrum of RGWs. In light of this result,
one would expect the scalar running index $\alpha_s$ to be of the same
magnitude as $\alpha_t$, if both RGWs and scalar perturbations are generated by
the same scalar inflation.
|
[{'version': 'v1', 'created': 'Fri, 2 Oct 2009 05:03:41 GMT'}]
|
2009-10-29
|
[array(['Tong', 'Ming-Lei', ''], dtype=object)
array(['Zhang', 'Yang', ''], dtype=object)]
|
4,968 |
physics/0110054
|
Lev I. Shekhtman
|
A.Bondar, A.Buzulutskov, L.Shekhtman, A.Sokolov, A.Vasiljev
|
Performance of the triple-GEM detector with optimized 2-D readout in
high intensity hadron beam
|
zip-file, contains main file in LATEX and 9 figures in eps and epsi
format
| null | null |
BINP 60-2001
|
physics.ins-det
| null |
Multiple-GEM detectors are considered to be good candidates for tracking
devices in experiments with high hadronic background. We present the results of
the triple-GEM detectors beam test in a high intensity pion beam. The detectors
had an optimized two-dimensional readout with minimized strip capacitance. Such
optimization permitted the starting point of the efficiency plateau down to a
gain of 5000. The probability of GEM discharges induced by heavily ionizing
particles has been measured as a function of gain: at a gain of 20000 it
amounts to 10^(-11) per incident particle. Such a value will ensure safe
operation of the detector in the conditions of forward region of the LHC
experiments.
|
[{'version': 'v1', 'created': 'Fri, 19 Oct 2001 08:45:53 GMT'}]
|
2007-05-23
|
[array(['Bondar', 'A.', ''], dtype=object)
array(['Buzulutskov', 'A.', ''], dtype=object)
array(['Shekhtman', 'L.', ''], dtype=object)
array(['Sokolov', 'A.', ''], dtype=object)
array(['Vasiljev', 'A.', ''], dtype=object)]
|
4,969 |
1412.0558
|
Jamila Douari Dr.
|
Jamila Douari
|
The Curved Space is The Electrified Flat Space
|
18 pages, 10 figures
|
Progress in Physics, 139-149, 2017 (vol. 13), issue 3
| null | null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The responsibility of the electric field $E$ in the modification of the
nature of the space is proved. We investigate the way the fundamental strings
are related to supergravity background of D5-branes; i.e. once the endpoints of
the D-strings are electrified the flat space becomes curved. We study the
electrified relative and overall transverse perturbations of fuzzy funnel
solutions of intersecting $(N,N_f)$-strings and D5-branes in flat and
supergravity backgrounds respectively. As result the perturbations have a
discontinuity which corresponds to a zero phase shift realizing Polchinski's
open string Neumann boundary condition. And once the electric field $E$ is
turned on in flat space these perturbations decrease and when $E$ is close to
the critical value $\frac{1}{\lambda}$ the perturbations disappear forever and
the string coupling becomes strong. At this stage the space is considered
curved and the electric field is responsible for this effect. This phenomena is
also enhanced by the behavior of the potential $V$ associated to the
perturbations $\Phi$ on the funnel solutions under the influence of the
electric field. The potential goes too fast to $-\infty$ when $E$ goes to the
critical value $\frac{1}{\lambda}$ in flat space which looks like a kink to
increase the velocity for $\Phi$ to disappear. But in curved space and close to
the intersecting point we do not find any perturbation for all $E$ and there is
no effect of $E$ on $V$ and this is a sign to the absence of the perturbation
effects in supergravity background. This clarifies the existence of a relation
between the electric field and the supergravity background.
|
[{'version': 'v1', 'created': 'Mon, 1 Dec 2014 17:39:36 GMT'}
{'version': 'v2', 'created': 'Wed, 3 Dec 2014 09:09:19 GMT'}
{'version': 'v3', 'created': 'Mon, 9 Jan 2017 17:29:02 GMT'}]
|
2017-07-19
|
[array(['Douari', 'Jamila', ''], dtype=object)]
|
4,970 |
0802.3517
|
Eugen Paal
|
Eugen Paal
|
Moufang symmetry II. Moufang-Mal'tsev pairs and triality
|
6 pages, LaTex2e, no figures
| null | null | null |
math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A concept of the Moufang-Malt'tsev pair is elaborated. This concept is based
on the generalized Maurer-Cartan equations of a local analytic Moufang loop.
Triality can be seen as a fundamental property of such pairs. Based on
triality, the Yamagutian is constructed. Properties of the Yamagutian are
studied.
|
[{'version': 'v1', 'created': 'Mon, 25 Feb 2008 20:29:06 GMT'}]
|
2008-02-26
|
[array(['Paal', 'Eugen', ''], dtype=object)]
|
4,971 |
1802.01113
|
Riccardo Junior Buonocore
|
R. J. Buonocore, G. Brandi, R. N. Mantegna, T. Di Matteo
|
On the interplay between multiscaling and stocks dependence
|
19 pages, 8 figures, 9 tables
| null | null | null |
q-fin.ST
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We find a nonlinear dependence between an indicator of the degree of
multiscaling of log-price time series of a stock and the average correlation of
the stock with respect to the other stocks traded in the same market. This
result is a robust stylized fact holding for different financial markets. We
investigate this result conditional on the stocks' capitalization and on the
kurtosis of stocks' log-returns in order to search for possible confounding
effects. We show that a linear dependence with the logarithm of the
capitalization and the logarithm of kurtosis does not explain the observed
stylized fact, which we interpret as being originated from a deeper
relationship.
|
[{'version': 'v1', 'created': 'Sun, 4 Feb 2018 12:28:07 GMT'}
{'version': 'v2', 'created': 'Sun, 31 Mar 2019 20:08:05 GMT'}]
|
2019-04-02
|
[array(['Buonocore', 'R. J.', ''], dtype=object)
array(['Brandi', 'G.', ''], dtype=object)
array(['Mantegna', 'R. N.', ''], dtype=object)
array(['Di Matteo', 'T.', ''], dtype=object)]
|
4,972 |
quant-ph/9902023
|
Dagmar Bruss
|
Dagmar Bruss
|
Entanglement splitting of pure bipartite quantum states
|
6 pages, 2 figures, extended version, to be published in Phys. Rev. A
|
Phys.Rev. A60 (1999) 4344
|
10.1103/PhysRevA.60.4344
|
ITP-UH-11/99
|
quant-ph
| null |
The concept of entanglement splitting is introduced by asking whether it is
possible for a party possessing half of a pure bipartite quantum state to
transfer some of his entanglement with the other party to a third party. We
describe the unitary local transformation for symmetric and isotropic splitting
of a singlet into two branches that leads to the highest entanglement of the
output. The capacity of the resulting quantum channels is discussed. Using the
same transformation for less than maximally entangled pure states, the
entanglement of the resulting states is found. We discuss whether they can be
used to do teleportation and to test the Bell inequality. Finally we generalize
to entanglement splitting into more than two branches.
|
[{'version': 'v1', 'created': 'Fri, 5 Feb 1999 17:21:01 GMT'}
{'version': 'v2', 'created': 'Tue, 31 Aug 1999 10:06:20 GMT'}]
|
2009-10-31
|
[array(['Bruss', 'Dagmar', ''], dtype=object)]
|
4,973 |
1808.08679
|
Amritanshu Prasad
|
Digjoy Paul, Amritanshu Prasad and Arghya Sadhukhan
|
Tableau Correspondences and Representation Theory
| null |
Contributions in Algebra and Algebraic Geometry, Contemporary
Mathematics, vol. 738, pages 109-124, 2019
|
10.1090/conm/738
| null |
math.RT math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We deduce decompositions of natural representations of general linear groups
and symmetric groups from combinatorial bijections involving tableaux. These
include some of Howe's dualities, Gelfand models, the Schur-Weyl decomposition
of tensor space, and multiplicity-free decompositions indexed by threshold
partitions.
|
[{'version': 'v1', 'created': 'Mon, 27 Aug 2018 03:50:11 GMT'}
{'version': 'v2', 'created': 'Tue, 28 Aug 2018 07:01:06 GMT'}]
|
2020-06-18
|
[array(['Paul', 'Digjoy', ''], dtype=object)
array(['Prasad', 'Amritanshu', ''], dtype=object)
array(['Sadhukhan', 'Arghya', ''], dtype=object)]
|
4,974 |
hep-th/9305043
|
Jean-Loup Gervais
|
Jean-Loup Gervais, Jens Schnittger
|
The Braiding of Chiral Vertex Operators with Continuous Spins in 2D
Gravity
|
(14 pages, Latex file) preprint LPTENS-93/19
|
Phys.Lett. B315 (1993) 258-266
|
10.1016/0370-2693(93)91610-Y
| null |
hep-th
| null |
Chiral vertex-operators are defined for continuous quantum-group spins $J$
from free-field realizations of the Coulomb-gas type. It is shown that these
generalized chiral vertex operators satisfy closed braiding relations on the
unit circle, which are given by an extension in terms of orthogonal polynomials
of the braiding matrix recently derived by Cremmer, Gervais and Roussel. This
leads to a natural extension of the Liouville exponentials to continuous powers
that remain local.
|
[{'version': 'v1', 'created': 'Tue, 11 May 1993 13:37:06 GMT'}]
|
2009-10-22
|
[array(['Gervais', 'Jean-Loup', ''], dtype=object)
array(['Schnittger', 'Jens', ''], dtype=object)]
|
4,975 |
hep-ph/9605259
|
Martin Beneke
|
M. Beneke, G. Buchalla and I. Dunietz
|
Width Difference in the $B_s-\bar{B_s}$ System
|
24 pages, LaTeX, 1 figure as uudecoded file
|
Phys.Rev.D83:119902,2011; Erratum-ibid.D83:119902,2011
|
10.1103/PhysRevD.54.4419 10.1103/PhysRevD.83.119902
|
SLAC-PUB-96-7165
|
hep-ph
| null |
We use the heavy quark expansion to investigate the width difference
$\Delta\Gamma_{B_s}$ between the $B_s$ mass eigenstates. The corrections of
${\cal O}(\Lambda_{QCD}/m_b)$ and ${\cal O}(m_s/m_b)$ to the leading order
expression in the operator product expansion are derived and estimated to yield
a sizable reduction of the leading result for $\Delta\Gamma_{B_s}$ by typically
$30\%$. For completeness we also quantify small effects due to penguin
operators and CKM suppressed contributions. Based on our results we discuss the
prediction for $(\Delta\Gamma/\Gamma)_{B_s}$ with particular emphasis on
theoretical uncertainties. We find
$(\Delta\Gamma/\Gamma)_{B_s}=0.16^{+0.11}_{-0.09}$, where the large error is
dominated by the uncertainty in hadronic matrix elements. An accuracy of about
$10\%$ in $(\Delta\Gamma/\Gamma)_{B_s}$ should be within reach, assuming
continuing progress in lattice calculations. In addition we address
phenomenological issues and implications of a $\Delta\Gamma_{B_s}$ measurement
for constraints on $\Delta M_{B_s}$ and CKM parameters. We further consider in
some detail the lifetime ratio $\tau(B_s)/\tau(B_d)$ and estimate that, most
likely, $|\tau(B_s)/\tau(B_d)-1|<1\%$.
|
[{'version': 'v1', 'created': 'Thu, 9 May 1996 01:16:00 GMT'}]
|
2011-07-04
|
[array(['Beneke', 'M.', ''], dtype=object)
array(['Buchalla', 'G.', ''], dtype=object)
array(['Dunietz', 'I.', ''], dtype=object)]
|
4,976 |
0903.3908
|
Gautam Bharali
|
Gautam Bharali
|
Obstructions to uniform estimates for solutions to the d-bar equation
|
This preprint has been withdrawn by the author because the estimate
(2.3) does not follow from the formula preceding it
| null | null | null |
math.CV math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that if, for every bounded d-bar-closed (0,1)-form f, a pseudoconvex
domain \Omega admits a solution to $\bar\partial u=f$ that is continuous up to
the boundary and has uniform estimates in terms of $\|f\|_\infty$, then each
p\in bdy(\Omega) must necessarily admit a peak function in the class
$A(\Omega):=\mathcal{O}(\Omega)\cap\mathcal{C}(\overline\OM)$. We use this fact
to examine some geometrical obstructions to uniform estimates for the d-bar
equation.
|
[{'version': 'v1', 'created': 'Mon, 23 Mar 2009 17:21:28 GMT'}
{'version': 'v2', 'created': 'Thu, 26 Mar 2009 04:49:19 GMT'}]
|
2009-03-26
|
[array(['Bharali', 'Gautam', ''], dtype=object)]
|
4,977 |
1305.2402
|
James Cusick
|
James Cusick
|
Architecture and Production Readiness Reviews in Practice
| null | null | null | null |
cs.SE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Detailed description of procedures around architecture reviews. In order to
succeed in building and deploying complex software solutions, an architecture
is essential. For many in the industry structured reviews of these
architectures is also de rigor. Practices for such reviews have been developed
and reported on for years. One aspect that does not receive as much attention
but is no less important is the relationship between these architectures and
the requirements for deploying them into production environments. At Wolters
Kluwer's Corporate Legal Services we first established a typical architecture
review process and then established a two phase production preparation review
process. This paper describes in detail how these practices work and some of
the technical results of these reviews including the frequency and style of the
reviews, the process automation around them, and the number and nature of some
of the technical flaws eliminated by enforcing these reviews. This paper lays
the ground work for others who would be interested in following similar
practices.
|
[{'version': 'v1', 'created': 'Fri, 10 May 2013 18:22:38 GMT'}
{'version': 'v2', 'created': 'Tue, 30 Dec 2014 21:13:31 GMT'}]
|
2015-01-05
|
[array(['Cusick', 'James', ''], dtype=object)]
|
4,978 |
physics/0310088
|
Yegor V. Tourleigh
|
Ye.V. Tourleigh, K.V. Shaitan
|
Molecular dynamics study of molecular mobility in catenanes
|
8 pages, 7 figures
|
Defect and Diffusion Forum, vol. 237-240 (2005), 1174-1181
| null | null |
physics.chem-ph physics.comp-ph
| null |
Molecular machines described in this paper are meant to be such molecular
systems that make use of conformational mobility (i.e. hindered rotation around
chemical bonds and molecular construction deformations with formation and
breakage of nonvalent bonds). Components of molecular machines move mainly by
means of restricted diffusion. As an example of molecular machines of a
nonbiological nature catenanes (compounds with two interlocked molecular
rings)can be proposed. Thus, for example, model catenane
((2)-(cyclo-bis(paraquat-p-phenylene))-(1(2,6)-tetrathiafulvalena-16(1,5)naphta
lena-3, 6, 9, 12, 15, 17, 20, 23, 26, 29-decaoxatnacontaphane)-catenane)
changes its redox status when an electric field is applied, and rotation of the
rings takes place. It occurs with fixation at certain moments of the influence.
To find out characteristic properties of rings movements under various external
conditions molecular dynamics simulation was carried out. Three cationic forms
of the catenane were first subjected to geometrical optimization and quantum
chemical calculation.
|
[{'version': 'v1', 'created': 'Fri, 17 Oct 2003 13:33:33 GMT'}
{'version': 'v2', 'created': 'Wed, 22 Oct 2003 13:53:05 GMT'}
{'version': 'v3', 'created': 'Fri, 24 Dec 2004 11:49:12 GMT'}
{'version': 'v4', 'created': 'Fri, 11 Mar 2005 19:31:19 GMT'}]
|
2007-05-23
|
[array(['Tourleigh', 'Ye. V.', ''], dtype=object)
array(['Shaitan', 'K. V.', ''], dtype=object)]
|
4,979 |
1607.07294
|
Alexandros Alexakis Dr
|
Alexandre Cameron and Alexandros Alexakis
|
The fate of alpha dynamos at large $Rm$
| null | null |
10.1103/PhysRevLett.117.205101
| null |
physics.flu-dyn astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
At the heart of today's solar magnetic field evolution models lies the alpha
dynamo description. In this work, we investigate the fate of alpha-dynamos as
the magnetic Reynolds number $Rm$ is increased. Using Floquet theory, we are
able to precisely quantify mean field effects like the alpha and beta effect
(i) by rigorously distinguishing dynamo modes that involve large scale
components from the ones that only involve small scales, and by (ii) providing
a way to investigate arbitrary large scale separations with minimal
computational cost. We apply this framework to helical and non-helical flows as
well as to random flows with short correlation time. Our results determine that
the alpha-description is valid for $Rm$ smaller than a critical value $Rm_c$ at
which small scale dynamo instability starts. When $Rm$ is above $Rm_c$ the
dynamo ceases to follow the mean field description and the growth rate of the
large scale modes becomes independent of the scale separation while the energy
in the large scale modes is inversely proportional to the square of the scale
separation. The results in this second regime do not depend on the presence of
helicity. Thus alpha-type modeling for solar and stellar models needs to be
reevaluated and new directions for mean field modeling are proposed.
|
[{'version': 'v1', 'created': 'Mon, 25 Jul 2016 14:35:29 GMT'}]
|
2016-11-23
|
[array(['Cameron', 'Alexandre', ''], dtype=object)
array(['Alexakis', 'Alexandros', ''], dtype=object)]
|
4,980 |
cond-mat/0608673
|
Hong-Hao Tu
|
Hong-Hao Tu, Guang-Ming Zhang, Lu Yu
|
Spin-quadrupole ordering of spin-3/2 ultracold fermionic atoms in
optical lattices in the one-band Hubbard model
|
12 pages, 5 figures
|
Phys. Rev. B 74, 174404 (2006)
|
10.1103/PhysRevB.74.174404
| null |
cond-mat.str-el
| null |
Based on a generalized one-band Hubbard model, we study magnetic properties
of Mott insulating states for ultracold spin-3/2 fermionic atoms in optical
lattices. When the \textit{s}-wave scattering lengths for the total spin
$S=2,0$ satisfy conditions $a_{2}>a_{0}>0$, we apply a functional integral
approach to the half filled case, where the spin-quadrupole fluctuations
dominate. On a 2D square lattice, the saddle point solution yields a staggered
spin-quadrupole ordering at zero temperature with symmetry breaking from SO(5)
to SO(4). Both spin and spin-quadrupole static structure factors are
calculated, displaying highly anisotropic spin antiferromagnetic fluctuations
and antiferroquadrupole long-range correlations, respectively. When Gaussian
fluctuations around the saddle point are taken into account, spin-quadrupole
density waves with a linear dispersion are derived. Compared with the spin
density waves in the half filled spin-1/2 Hubbard model, the quadrupole density
wave velocity is saturated in the strong-coupling limit, and there are no
transverse spin-quadrupole mode couplings, as required by the SO(4) invariance
of the effective action. Finally, in the strong-coupling limit of the model
Hamiltonian, we derive the effective hyperfine spin-exchange interactions for
the Mott insulating phases in the quarter filled and half filled cases,
respectively.
|
[{'version': 'v1', 'created': 'Wed, 30 Aug 2006 14:32:57 GMT'}
{'version': 'v2', 'created': 'Sat, 14 Oct 2006 13:10:22 GMT'}
{'version': 'v3', 'created': 'Sat, 4 Nov 2006 14:42:30 GMT'}]
|
2007-05-23
|
[array(['Tu', 'Hong-Hao', ''], dtype=object)
array(['Zhang', 'Guang-Ming', ''], dtype=object)
array(['Yu', 'Lu', ''], dtype=object)]
|
4,981 |
1201.4912
|
Jason Williford
|
Frank A. Firke, Peter M. Kosek, Evan D. Nash, Jason Williford
|
Extremal Graphs Without 4-Cycles
|
9 pages
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove an upper bound for the number of edges a C4-free graph on q^2 + q
vertices can contain for q even. This upper bound is achieved whenever there is
an orthogonal polarity graph of a plane of even order q.
|
[{'version': 'v1', 'created': 'Tue, 24 Jan 2012 04:10:51 GMT'}]
|
2012-01-25
|
[array(['Firke', 'Frank A.', ''], dtype=object)
array(['Kosek', 'Peter M.', ''], dtype=object)
array(['Nash', 'Evan D.', ''], dtype=object)
array(['Williford', 'Jason', ''], dtype=object)]
|
4,982 |
2305.18668
|
Ma\"elic Neau
|
Neau Ma\"elic, Paulo Santos, Anne-Gwenn Bosser and C\'edric Buche
|
Fine-Grained is Too Coarse: A Novel Data-Centric Approach for Efficient
Scene Graph Generation
| null | null | null | null |
cs.CV
|
http://creativecommons.org/licenses/by-sa/4.0/
|
Learning to compose visual relationships from raw images in the form of scene
graphs is a highly challenging task due to contextual dependencies, but it is
essential in computer vision applications that depend on scene understanding.
However, no current approaches in Scene Graph Generation (SGG) aim at providing
useful graphs for downstream tasks. Instead, the main focus has primarily been
on the task of unbiasing the data distribution for predicting more fine-grained
relations. That being said, all fine-grained relations are not equally relevant
and at least a part of them are of no use for real-world applications. In this
work, we introduce the task of Efficient SGG that prioritizes the generation of
relevant relations, facilitating the use of Scene Graphs in downstream tasks
such as Image Generation. To support further approaches in this task, we
present a new dataset, VG150-curated, based on the annotations of the popular
Visual Genome dataset. We show through a set of experiments that this dataset
contains more high-quality and diverse annotations than the one usually adopted
by approaches in SGG. Finally, we show the efficiency of this dataset in the
task of Image Generation from Scene Graphs. Our approach can be easily
replicated to improve the quality of other Scene Graph Generation datasets.
|
[{'version': 'v1', 'created': 'Tue, 30 May 2023 00:55:49 GMT'}]
|
2023-05-31
|
[array(['Maëlic', 'Neau', ''], dtype=object)
array(['Santos', 'Paulo', ''], dtype=object)
array(['Bosser', 'Anne-Gwenn', ''], dtype=object)
array(['Buche', 'Cédric', ''], dtype=object)]
|
4,983 |
1703.09447
|
Martin Pl\'avala
|
Anna Jen\v{c}ov\'a, Martin Pl\'avala
|
Conditions on the existence of maximally incompatible two-outcome
measurements in General Probabilistic Theory
| null |
Phys. Rev. A 96, 022113 (2017)
|
10.1103/PhysRevA.96.022113
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We formulate the necessary and sufficient conditions for the existence of a
pair of maximally incompatible two-outcome measurements in a finite dimensional
General Probabilistic Theory. The conditions are on the geometry of the state
space, they require existence of two pairs of parallel exposed faces with
additional condition on their intersections. We introduce the notion of
discrimination measurement and show that the conditions for a pair of
two-outcome measurements to be maximally incompatible are equivalent to
requiring that a (potential, yet non-existing) joint measurement of the
maximally incompatible measurements would have to discriminate affinely
dependent points. We present several examples to demonstrate our results.
|
[{'version': 'v1', 'created': 'Tue, 28 Mar 2017 08:30:21 GMT'}]
|
2017-08-16
|
[array(['Jenčová', 'Anna', ''], dtype=object)
array(['Plávala', 'Martin', ''], dtype=object)]
|
4,984 |
1810.11643
|
Julian Braun
|
Julian Braun, Manh Hong Duong, Christoph Ortner
|
Thermodynamic Limit of the Transition Rate of a Crystalline Defect
|
new version has improved, sharp convergence rates
| null | null | null |
math.PR math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider an isolated point defect embedded in a homogeneous crystalline
solid. We show that, in the harmonic approximation, a periodic supercell
approximation of the formation free energy as well as of the transition rate
between two stable configurations converge as the cell size tends to infinity.
We characterise the limits and establish sharp convergence rates. Both cases
can be reduced to a careful renormalisation analysis of the vibrational entropy
difference, which is achieved by identifying an underlying spatial
decomposition.
|
[{'version': 'v1', 'created': 'Sat, 27 Oct 2018 13:42:07 GMT'}
{'version': 'v2', 'created': 'Mon, 10 Dec 2018 12:56:50 GMT'}]
|
2018-12-11
|
[array(['Braun', 'Julian', ''], dtype=object)
array(['Duong', 'Manh Hong', ''], dtype=object)
array(['Ortner', 'Christoph', ''], dtype=object)]
|
4,985 |
1906.08644
|
Kenier Castillo
|
K. Castillo and I. Zaballa
|
On variation of eigenvalues of birth and death matrices and random walk
matrices
| null | null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The purpose of this note is twofold: firstly to improve the known results on
variation of extreme eigenvalues of birth and death matrices and random walk
matrices; and secondly to progress towards the solution of a thirty years old
open problem concerning the variation of eigenvalues of these matrices.
Keywords: Birth and death matrices, random walk matrices, eigenvalues,
monotonicity
|
[{'version': 'v1', 'created': 'Wed, 19 Jun 2019 09:36:54 GMT'}]
|
2019-06-21
|
[array(['Castillo', 'K.', ''], dtype=object)
array(['Zaballa', 'I.', ''], dtype=object)]
|
4,986 |
hep-ex/0501052
|
Laurent Favart
|
L. Favart
|
Experimental review of diffractive phenomena
|
Contribution to the proceedings of BARYONS 2004. LaTeX 10 pages
|
Nucl.Phys. A755 (2005) 123-132
|
10.1016/j.nuclphysa.2005.03.152
| null |
hep-ex
| null |
A review is given of the measurements of the hard diffractive interactions in
recent years from two high-energy colliders, the HERA $ep$ collider and the
Tevatron $p\bar{p}$ collider. The structure of the diffractive exchange in
terms of partons, the factorisation properties and the ratio of diffractive to
non-diffractive cross sections are discussed.
|
[{'version': 'v1', 'created': 'Thu, 20 Jan 2005 13:28:19 GMT'}]
|
2015-06-25
|
[array(['Favart', 'L.', ''], dtype=object)]
|
4,987 |
2012.08011
|
Danish Syed
|
Danish Syed, Naman Gandhi, Arushi Arora and Nilesh Kadam
|
DeepGamble: Towards unlocking real-time player intelligence using
multi-layer instance segmentation and attribute detection
|
2020 19th IEEE International Conference on Machine Learning and
Applications (ICMLA)
| null |
10.1109/ICMLA51294.2020.00067
| null |
cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
Annually the gaming industry spends approximately $15 billion in marketing
reinvestment. However, this amount is spent without any consideration for the
skill and luck of the player. For a casino, an unskilled player could fetch ~4
times more revenue than a skilled player. This paper describes a video
recognition system that is based on an extension of the Mask R-CNN model. Our
system digitizes the game of blackjack by detecting cards and player bets in
real-time and processes decisions they took in order to create accurate player
personas. Our proposed supervised learning approach consists of a specialized
three-stage pipeline that takes images from two viewpoints of the casino table
and does instance segmentation to generate masks on proposed regions of
interest. These predicted masks along with derivative features are used to
classify image attributes that are passed onto the next stage to assimilate the
gameplay understanding. Our end-to-end model yields an accuracy of ~95% for the
main bet detection and ~97% for card detection in a controlled environment
trained using transfer learning approach with 900 training examples. Our
approach is generalizable and scalable and shows promising results in varied
gaming scenarios and test data. Such granular level gathered data, helped in
understanding player's deviation from optimum strategy and thereby separate the
skill of the player from the luck of the game. Our system also assesses the
likelihood of card counting by correlating the player's betting pattern to the
deck's scaled count. Such a system lets casinos flag fraudulent activity and
calculate expected personalized profitability for each player and tailor their
marketing reinvestment decisions.
|
[{'version': 'v1', 'created': 'Mon, 14 Dec 2020 23:46:26 GMT'}]
|
2020-12-16
|
[array(['Syed', 'Danish', ''], dtype=object)
array(['Gandhi', 'Naman', ''], dtype=object)
array(['Arora', 'Arushi', ''], dtype=object)
array(['Kadam', 'Nilesh', ''], dtype=object)]
|
4,988 |
hep-ph/9601203
| null |
R. N. Mohapatra
|
$SU(5)\times SU(5)$ Unification, Seesaw Mechanism and R-Conservation
|
Plain latex, 9 pages; No figures
|
Phys.Lett. B379 (1996) 115-120
|
10.1016/0370-2693(96)00470-4
|
UMD-PP-96-59
|
hep-ph
| null |
A new supersymmetric grand unified model based on the gauge group
$SU(5)\times SU(5)$ is discussed. The model has the feature that the
conventional seesaw mechanism for neutrino masses is implemented using the
$(15, 1)+(1,\bar{15)}$ representation. This multiplet may have a better chance
of arising from level two compactification of superstring theories than the the
${bf \bar{126}}$ representation used in the SO(10) model. The model also
naturally suppresses all R-parity violating interactions.
|
[{'version': 'v1', 'created': 'Tue, 2 Jan 1996 17:23:04 GMT'}]
|
2009-10-28
|
[array(['Mohapatra', 'R. N.', ''], dtype=object)]
|
4,989 |
cond-mat/0503567
|
Alexander Germanenko
|
G.M.Minkov, A.A.Sherstobitov, A.V.Germanenko, O.E.Rut, V.A.Larionova,
and B.N.Zvonkov
|
Hole-hole interaction in a strained In$_x$Ga$_{1-x}$As two dimensional
system
|
7 pages, 6 figures
|
Phys. Rev. B 72, 165325 (2005)
|
10.1103/PhysRevB.72.165325
| null |
cond-mat.dis-nn
| null |
The interaction correction to the conductivity of 2D hole gas in strained
GaAs/In$_x$Ga$_{1-x}$As/GaAs quantum well structures was studied. It is shown
that the Zeeman splitting, spin relaxation and ballistic contribution should be
taking into account for reliable determination of the Fermi-liquid constant
$F_0^\sigma$. The proper consideration of these effects allows us to describe
both th temperature and magnetic field dependences of the conductivity and find
the value of $F_0^\sigma$.
|
[{'version': 'v1', 'created': 'Wed, 23 Mar 2005 09:24:48 GMT'}]
|
2008-12-02
|
[array(['Minkov', 'G. M.', ''], dtype=object)
array(['Sherstobitov', 'A. A.', ''], dtype=object)
array(['Germanenko', 'A. V.', ''], dtype=object)
array(['Rut', 'O. E.', ''], dtype=object)
array(['Larionova', 'V. A.', ''], dtype=object)
array(['Zvonkov', 'B. N.', ''], dtype=object)]
|
4,990 |
2006.11213
|
Feng Zhang
|
Feng Zhang, Niladri Gomes, Noah F. Berthusen, Peter P. Orth,
Cai-Zhuang Wang, Kai-Ming Ho, Yong-Xin Yao
|
Shallow-circuit variational quantum eigensolver based on
symmetry-inspired Hilbert space partitioning for quantum chemical
calculations
| null |
Phys. Rev. Research 3, 013039 (2021)
|
10.1103/PhysRevResearch.3.013039
| null |
quant-ph cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Development of resource-friendly quantum algorithms remains highly desirable
for noisy intermediate-scale quantum computing. Based on the variational
quantum eigensolver (VQE) with unitary coupled cluster ansatz, we demonstrate
that partitioning of the Hilbert space made possible by the point group
symmetry of the molecular systems greatly reduces the number of variational
operators by confining the variational search within a subspace. In addition,
we found that instead of including all subterms for each excitation operator, a
single-term representation suffices to reach required accuracy for various
molecules tested, resulting in an additional shortening of the quantum circuit.
With these strategies, VQE calculations on a noiseless quantum simulator
achieve energies within a few meVs of those obtained with the full UCCSD ansatz
for $\mathrm{H}_4$ square, $\mathrm{H}_4$ chain and $\mathrm{H}_6$ hexagon
molecules; while the number of controlled-NOT (CNOT) gates, a measure of the
quantum-circuit depth, is reduced by a factor of as large as 35. Furthermore,
we introduced an efficient "score" parameter to rank the excitation operators,
so that the operators causing larger energy reduction can be applied first.
Using $\mathrm{H}_4$ square and $\mathrm{H}_4$ chain as examples, We
demonstrated on noisy quantum simulators that the first few variational
operators can bring the energy within the chemical accuracy, while additional
operators do not improve the energy since the accumulative noise outweighs the
gain from the expansion of the variational ansatz.
|
[{'version': 'v1', 'created': 'Fri, 19 Jun 2020 16:28:26 GMT'}]
|
2021-01-20
|
[array(['Zhang', 'Feng', ''], dtype=object)
array(['Gomes', 'Niladri', ''], dtype=object)
array(['Berthusen', 'Noah F.', ''], dtype=object)
array(['Orth', 'Peter P.', ''], dtype=object)
array(['Wang', 'Cai-Zhuang', ''], dtype=object)
array(['Ho', 'Kai-Ming', ''], dtype=object)
array(['Yao', 'Yong-Xin', ''], dtype=object)]
|
4,991 |
nucl-ex/9801008
|
Abbas Kenan Ciftci
|
H. Aktas, N. Buget, A.K. Ciftci, N. Meric, S. Sultansoy, O. Yavas
|
New Tool for "Old" Nuclear Physics: FEL gamma-Nucleus Colliders
|
5 pages, 1 Figure
|
Nucl.Instrum.Meth. A428 (1999) 271-275
|
10.1016/S0168-9002(99)00137-0
|
AU-HEP-98/01
|
nucl-ex
| null |
A new method has been considered to investigate the scattering reactions with
photons on fully ionized nuclei. To induce $\gamma $-nucleus collisions a free
electron laser and a heavy ion synchrotron have been considered bringing them
together. Main parameters of the collider (especially LHC and HERA for the
acceleration of nuclei) have been estimated. Rough calculations have also been
made for the cross sections of the excited nuclei production. Finally, some
design problems involving the collider have been considered.
|
[{'version': 'v1', 'created': 'Wed, 28 Jan 1998 11:58:08 GMT'}]
|
2009-10-31
|
[array(['Aktas', 'H.', ''], dtype=object)
array(['Buget', 'N.', ''], dtype=object)
array(['Ciftci', 'A. K.', ''], dtype=object)
array(['Meric', 'N.', ''], dtype=object)
array(['Sultansoy', 'S.', ''], dtype=object)
array(['Yavas', 'O.', ''], dtype=object)]
|
4,992 |
2109.05334
|
Yi Ma
|
Lifu Liu, Yi Ma, and Na Yi
|
Hermite Expansion Model and LMMSE Analysis for Low-Resolution Quantized
MIMO Detection
|
16 pages
|
IEEE Trans. Signal Processing 2021
| null | null |
cs.IT eess.SP math.IT
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
In this paper, the Hermite polynomials are employed to study linear
approximation models of narrowband multiantenna signal reception (i.e., MIMO)
with low-resolution quantizations. This study results in a novel linear
approximation using the second-order Hermite expansion (SOHE). The SOHE model
is not based on those assumptions often used in existing linear approximations.
Instead, the quantization distortion is characterized by the second-order
Hermite kernel, and the signal term is characterized by the first-order Hermite
kernel. It is shown that the SOHE model can explain almost all phenomena and
characteristics observed so far in the low-resolution MIMO signal reception.
When the SOHE model is employed to analyze the linear minimum-mean-square-error
(LMMSE) channel equalizer, it is revealed that the current LMMSE algorithm can
be enhanced by incorporating a symbol-level normalization mechanism. The
performance of the enhanced LMMSE algorithm is demonstrated through computer
simulations for narrowband MIMO systems in Rayleigh fading channels.
|
[{'version': 'v1', 'created': 'Sat, 11 Sep 2021 18:16:13 GMT'}]
|
2021-09-14
|
[array(['Liu', 'Lifu', ''], dtype=object)
array(['Ma', 'Yi', ''], dtype=object)
array(['Yi', 'Na', ''], dtype=object)]
|
4,993 |
2302.05231
|
Selda K\"u\c{c}\"uk\c{c}if\c{c}i G\"ull\"u
|
Selda Kucukcifci and E. Sule Yazici
|
Orthogonal cycle systems with cycle length less than 10
| null | null | null | null |
math.CO
|
http://creativecommons.org/licenses/by/4.0/
|
An $H$-decomposition of $G$ is a partition of the edge-set of $G$ into
subsets, where each subset induces a copy of the graph $H$. A $k$-orthogonal
$H$-decomposition of a graph $G$ is a set of $k$ $H$-decompositions of $G$,
such that any two copies of $H$ in distinct $H$-decompositions intersect in at
most one edge. When $G=K_v$ we call the $H$-decomposition an $H$-system of
order $v$. In this paper we consider the case $H$ is an $l$-cycle and construct
a pair of orthogonal $l$-cycle systems for all admissible orders when $l=5,6,7,
8\ or\ 9$, except $(l,v)=(7,7)$ and $(l,v)=(9,9)$.
|
[{'version': 'v1', 'created': 'Fri, 10 Feb 2023 13:02:05 GMT'}]
|
2023-02-13
|
[array(['Kucukcifci', 'Selda', ''], dtype=object)
array(['Yazici', 'E. Sule', ''], dtype=object)]
|
4,994 |
2304.13205
|
Simin Shekarpaz
|
Simin Shekarpaz, Fanhai Zeng, and George Karniadakis
|
Splitting physics-informed neural networks for inferring the dynamics of
integer- and fractional-order neuron models
| null | null | null | null |
math.NA cs.LG cs.NA cs.NE physics.comp-ph
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
We introduce a new approach for solving forward systems of differential
equations using a combination of splitting methods and physics-informed neural
networks (PINNs). The proposed method, splitting PINN, effectively addresses
the challenge of applying PINNs to forward dynamical systems and demonstrates
improved accuracy through its application to neuron models. Specifically, we
apply operator splitting to decompose the original neuron model into
sub-problems that are then solved using PINNs. Moreover, we develop an $L^1$
scheme for discretizing fractional derivatives in fractional neuron models,
leading to improved accuracy and efficiency. The results of this study
highlight the potential of splitting PINNs in solving both integer- and
fractional-order neuron models, as well as other similar systems in
computational science and engineering.
|
[{'version': 'v1', 'created': 'Wed, 26 Apr 2023 00:11:00 GMT'}]
|
2023-04-27
|
[array(['Shekarpaz', 'Simin', ''], dtype=object)
array(['Zeng', 'Fanhai', ''], dtype=object)
array(['Karniadakis', 'George', ''], dtype=object)]
|
4,995 |
1606.00349
|
Mario Bonk
|
Mario Bonk
|
Uniformization by square domains
| null | null | null | null |
math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We find an extremal problem for conformal maps on a finitely connected
subregion of the Riemann sphere containing the point at infinity whose unique
solution is a map onto a square domain, that is, a domain whose complementary
components are (possibly degenerate) squares with sides parallel to the real or
the imaginary axis.
|
[{'version': 'v1', 'created': 'Wed, 1 Jun 2016 16:32:06 GMT'}]
|
2016-06-02
|
[array(['Bonk', 'Mario', ''], dtype=object)]
|
4,996 |
2107.05208
|
Yingqiu Mao
|
Yingqiu Mao, Ming Gong, Kae Nemoto, William J. Munro, Johannes Majer
|
Perspective on witnessing entanglement in hybrid quantum systems
|
6 figures, 3 figures, published in Applied Physics Letters
| null |
10.1063/5.0062842
| null |
quant-ph
|
http://creativecommons.org/licenses/by/4.0/
|
Hybrid quantum systems aim at combining the advantages of different physical
systems and to produce novel quantum devices. In particular, the hybrid
combination of superconducting circuits and spins in solid-state crystals is a
versatile platform to explore many quantum electrodynamics problems. Recently,
the remote coupling of nitrogen-vacancy center spins in diamond via a
superconducting bus was demonstrated. However, a rigorous experimental test of
the quantum nature of this hybrid system and in particular entanglement is
still missing. We review the theoretical ideas to generate and detect
entanglement, and present our own scheme to achieve this.
|
[{'version': 'v1', 'created': 'Mon, 12 Jul 2021 06:01:04 GMT'}
{'version': 'v2', 'created': 'Thu, 16 Sep 2021 13:12:58 GMT'}]
|
2021-09-17
|
[array(['Mao', 'Yingqiu', ''], dtype=object)
array(['Gong', 'Ming', ''], dtype=object)
array(['Nemoto', 'Kae', ''], dtype=object)
array(['Munro', 'William J.', ''], dtype=object)
array(['Majer', 'Johannes', ''], dtype=object)]
|
4,997 |
1811.10827
|
Shashi Ranjan Kumar
|
Dwaipayan Mukherjee and Shashi Ranjan Kumar
|
Finite-time Heterogeneous Cyclic Pursuit with Application to Target
Interception
|
12 pages, 9 figures
| null | null | null |
cs.SY cs.MA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper presents a finite-time heterogeneous cyclic pursuit scheme that
ensures consensus among agents modelled as integrators. It is shown that for
the proposed sliding mode control, even when the gains corresponding to each
agent are non-identical, consensus results within a finite-time provided all
the gains are positive. An algorithm is presented to compute the consensus
value and consensus time for a given set of gains and initial states of the
agents. The set of values where consensus can occur, by varying the gains, has
been derived and a second algorithm aids in determining the gains that enable
consensus at any point in the aforementioned set, within a given finite-time.
As an application, the finite-time consensus in line-of-sight (LOS) rates, over
a cycle digraph, for a group of interceptors is shown to be effective in
ensuring co-operative collision-free interception of a target, for both
kinematic and realistic models of the interceptors. Simulations vindicate the
theoretical results.
|
[{'version': 'v1', 'created': 'Tue, 27 Nov 2018 06:11:30 GMT'}
{'version': 'v2', 'created': 'Wed, 28 Nov 2018 11:55:02 GMT'}]
|
2018-11-29
|
[array(['Mukherjee', 'Dwaipayan', ''], dtype=object)
array(['Kumar', 'Shashi Ranjan', ''], dtype=object)]
|
4,998 |
cond-mat/0611516
|
Mamata Sahoo
|
A.M. Jayannavar, Mamata Sahoo
|
A charged particle in a magnetic field - Jarzynski Equality
|
5 pages, minor corrections made and journal reference added
|
Phys. Rev. E 75 , 032102 (2007)
|
10.1103/PhysRevE.75.032102
| null |
cond-mat.stat-mech physics.class-ph
| null |
We describe some solvable models which illustrate the Jarzynski theorem and
related fluctuation theorems. We consider a charged particle in the presence of
magnetic field in a two dimensional harmonic well. In the first case the centre
of the harmonic potential is translated with a uniform velocity, while in the
other case the particle is subjected to an ac force. We show that Jarzynski
identity complements Bohr-van Leeuwen theorem on the absence of diamagnetism in
equilibrium classical system.
|
[{'version': 'v1', 'created': 'Mon, 20 Nov 2006 10:19:17 GMT'}
{'version': 'v2', 'created': 'Mon, 2 Apr 2007 12:44:53 GMT'}]
|
2015-06-25
|
[array(['Jayannavar', 'A. M.', ''], dtype=object)
array(['Sahoo', 'Mamata', ''], dtype=object)]
|
4,999 |
2105.14035
|
Shih-Ting Huang
|
Shih-Ting Huang and Johannes Lederer
|
DeepMoM: Robust Deep Learning With Median-of-Means
| null | null | null | null |
stat.ML cs.LG stat.CO
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Data used in deep learning is notoriously problematic. For example, data are
usually combined from diverse sources, rarely cleaned and vetted thoroughly,
and sometimes corrupted on purpose. Intentional corruption that targets the
weak spots of algorithms has been studied extensively under the label of
"adversarial attacks." In contrast, the arguably much more common case of
corruption that reflects the limited quality of data has been studied much
less. Such "random" corruptions are due to measurement errors, unreliable
sources, convenience sampling, and so forth. These kinds of corruption are
common in deep learning, because data are rarely collected according to strict
protocols -- in strong contrast to the formalized data collection in some parts
of classical statistics. This paper concerns such corruption. We introduce an
approach motivated by very recent insights into median-of-means and Le Cam's
principle, we show that the approach can be readily implemented, and we
demonstrate that it performs very well in practice. In conclusion, we believe
that our approach is a very promising alternative to standard parameter
training based on least-squares and cross-entropy loss.
|
[{'version': 'v1', 'created': 'Fri, 28 May 2021 18:07:32 GMT'}
{'version': 'v2', 'created': 'Mon, 8 Nov 2021 07:54:04 GMT'}]
|
2021-11-09
|
[array(['Huang', 'Shih-Ting', ''], dtype=object)
array(['Lederer', 'Johannes', ''], dtype=object)]
|
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