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44.4k
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
6,400 |
1309.6521
|
Simon Caron-Huot
|
Simon Caron-Huot
|
When does the gluon reggeize?
|
70 pages, 14 figures. Published version. Review sections 2 and 3
significantly expanded in v3, following comments from a helpful referee
| null | null | null |
hep-th hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose the eikonal approximation as a simple and reliable tool to analyze
relativistic high-energy processes, provided that the necessary subtleties are
accounted for. An important subtlety is the need to include eikonal phases for
a rapidity-dependent collection of particles, as embodied by the
Balitsky-JIMWLK rapidity evolution equation. In the first part of this paper,
we review how the phenomenon of gluon reggeization and the BFKL equations can
be understood simply (but not too simply) in the eikonal approach. We also work
out some previously overlooked implications of BFKL dynamics, including the
observation that starting from four loops it is incompatible with a recent
conjecture regarding the structure of infrared divergences. In the second part
of this paper, we propose that in the strict planar limit the theory can be
developed to all orders in the coupling with no reference at all to the concept
of "reggeized gluon." Rather, one can work directly with a finite,
process-dependent, number of Wilson lines. We demonstrate consistency of this
proposal by an exact computation in N=4 super Yang-Mills, which shows that in
processes mediated with two Wilson lines the reggeized gluon appears in the
weak coupling limit as a resonance whose width is proportional to the coupling.
We also provide a precise operator definition of Lipatov's integrable spin
chain, which is manifestly integrable at any value of the coupling as a result
of the duality between scattering amplitudes and Wilson loops in this theory.
|
[{'version': 'v1', 'created': 'Wed, 25 Sep 2013 14:30:41 GMT'}
{'version': 'v2', 'created': 'Mon, 14 Jul 2014 19:24:05 GMT'}
{'version': 'v3', 'created': 'Tue, 19 May 2015 09:12:32 GMT'}]
|
2015-05-20
|
[array(['Caron-Huot', 'Simon', ''], dtype=object)]
|
6,401 |
1912.11058
|
Steffen S\"aubert
|
S. S\"aubert, A. Scheie, C. Duvinage, J. Kindervater, S. Zhang, H.J.
Changlani, Guangyong Xu, S.M. Koohpayeh, O. Tchernyshyov, C.L. Broholm, and
C. Pfleiderer
|
Orientation Dependence of the Magnetic Phase Diagram of
Yb$_2$Ti$_2$O$_7$
| null |
Phys. Rev. B 101, 174434 (2020)
|
10.1103/PhysRevB.101.174434
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the quest to realize a quantum spin liquid (QSL), magnetic long-range
order is hardly welcome. Yet it can offer deep insights into a complex world of
strong correlations and fluctuations. Much hope was placed in the cubic
pyrochlore Yb$_2$Ti$_2$O$_7$ as a putative U(1) QSL but a new class of
ultra-pure single crystals make it abundantly clear the stoichiometric compound
is a ferromagnet. Here we present a detailed experimental and theoretical study
of the corresponding field-temperature phase diagram. We find it to be richly
anisotropic with a critical endpoint for $\vec{B}\,\parallel\,\langle
100\rangle$, while field parallel to $\langle 110 \rangle$ and $\langle 111
\rangle$ enhances the critical temperature by up to a factor of two and shifts
the onset of the field-polarized state to finite fields. Landau theory shows
that Yb$_2$Ti$_2$O$_7$ in some ways is remarkably similar to pure iron.
However, it also pinpoints anomalies that cannot be accounted for at the
classical mean-field level including a dramatic enhancement of $T_{\mathrm{C}}$
and reentrant phase boundary by fields with a component transverse to the easy
axes, as well as the anisotropy of the upper critical field in the quantum
limit.
|
[{'version': 'v1', 'created': 'Mon, 23 Dec 2019 19:00:19 GMT'}]
|
2020-05-27
|
[array(['Säubert', 'S.', ''], dtype=object)
array(['Scheie', 'A.', ''], dtype=object)
array(['Duvinage', 'C.', ''], dtype=object)
array(['Kindervater', 'J.', ''], dtype=object)
array(['Zhang', 'S.', ''], dtype=object)
array(['Changlani', 'H. J.', ''], dtype=object)
array(['Xu', 'Guangyong', ''], dtype=object)
array(['Koohpayeh', 'S. M.', ''], dtype=object)
array(['Tchernyshyov', 'O.', ''], dtype=object)
array(['Broholm', 'C. L.', ''], dtype=object)
array(['Pfleiderer', 'C.', ''], dtype=object)]
|
6,402 |
1611.07131
|
Chengping Shen
|
Belle Collaboration: S. Jia, C. P. Shen, C. Z. Yuan, I. Adachi, H.
Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A.
M. Bakich, V. Bansal, E. Barberio, P. Behera, B. Bhuyan, J. Biswal, G.
Bonvicini, A. Bozek, M. Bra\v{c}ko, T. E. Browder, D. \v{C}ervenkov, P.
Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S.-K. Choi,
Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dr\'asal, D. Dutta, S.
Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N.
Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, B. Golob, J. Haba, T. Hara,
K. Hayasaka, H. Hayashii, M. T. Hedges, W.-S. Hou, T. Iijima, K. Inami, G.
Inguglia, A. Ishikawa, R. Itoh, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, K.
H. Kang, P. Katrenko, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J.
Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, P. Kody\v{s}, S.
Korpar, D. Kotchetkov, P. Kri\v{z}an, P. Krokovny, T. Kuhr, R. Kulasiri, A.
Kuzmin, Y.-J. Kwon, J. S. Lange, C. H. Li, L. Li, Y. Li, L. Li Gioi, J.
Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko,
K. Miyabayashi, H. Miyata, R. Mizuk, H. K. Moon, T. Mori, M. Nakao, T. Nanut,
K. J. Nath, Z. Natkaniec, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S.
Ogawa, S. Okuno, H. Ono, Y. Onuki, W. Ostrowicz, G. Pakhlova, B. Pal, C.-S.
Park, H. Park, R. Pestotnik, L. E. Piilonen, C. Pulvermacher, M. Ritter, A.
Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O.
Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, V.
Shebalin, T.-A. Shibata, J.-G. Shiu, B. Shwartz, F. Simon, A. Sokolov, E.
Solovieva, M. Stari\v{c}, J. F. Strube, M. Sumihama, T. Sumiyoshi, K. Suzuki,
M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y.
Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, V. Vorobyev, C.
H. Wang, M.-Z. Wang, P. Wang, Y. Watanabe, E. Won, Y. Yamashita, H. Ye, J.
Yelton, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc
|
Search for the $0^{--}$ Glueball in $\Upsilon(1S)$ and $\Upsilon(2S)$
decays
|
19 pages, 17 figures, Fig.10b was polished, but all the results
unchanged. Paper was published in PRD
|
Phys. Rev. D 95, 012001 (2017)
|
10.1103/PhysRevD.95.012001
|
Belle Preprint 2016-12; KEK Preprint 2016-50
|
hep-ex hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report the first search for the $J^{PC}=0^{--}$ glueball in $\Upsilon(1S)$
and $\Upsilon(2S)$ decays with data samples of $(102\pm2)$ million and
$(158\pm4)$ million events, respectively, collected with the Belle detector. No
significant signals are observed in any of the proposed production modes, and
the 90\% credibility level upper limits on their branching fractions in
$\Upsilon(1S)$ and $\Upsilon(2S)$ decays are obtained. The inclusive branching
fractions of the $\Upsilon(1S)$ and $\Upsilon(2S)$ decays into final states
with a $\chi_{c1}$ are measured to be $\BR(\Upsilon(1S)\to \chi_{c1}+ anything)
= (1.90\pm 0.43(stat.)\pm 0.14(syst.))\times 10^{-4}$ with an improved
precision over prior measurements and $\BR(\Upsilon(2S)\to \chi_{c1}+ anything)
= (2.24\pm 0.44(stat.)\pm 0.20(syst.))\times 10^{-4}$ for the first time.
|
[{'version': 'v1', 'created': 'Tue, 22 Nov 2016 03:00:15 GMT'}
{'version': 'v2', 'created': 'Thu, 5 Jan 2017 01:17:53 GMT'}]
|
2017-01-06
|
[array(['Belle Collaboration', '', ''], dtype=object)
array(['Jia', 'S.', ''], dtype=object)
array(['Shen', 'C. P.', ''], dtype=object)
array(['Yuan', 'C. Z.', ''], dtype=object)
array(['Adachi', 'I.', ''], dtype=object)
array(['Aihara', 'H.', ''], dtype=object)
array(['Said', 'S. Al', ''], dtype=object)
array(['Asner', 'D. M.', ''], dtype=object)
array(['Aushev', 'T.', ''], dtype=object)
array(['Ayad', 'R.', ''], dtype=object)
array(['Babu', 'V.', ''], dtype=object)
array(['Badhrees', 'I.', ''], dtype=object)
array(['Bakich', 'A. M.', ''], dtype=object)
array(['Bansal', 'V.', ''], dtype=object)
array(['Barberio', 'E.', ''], dtype=object)
array(['Behera', 'P.', ''], dtype=object)
array(['Bhuyan', 'B.', ''], dtype=object)
array(['Biswal', 'J.', ''], dtype=object)
array(['Bonvicini', 'G.', ''], dtype=object)
array(['Bozek', 'A.', ''], dtype=object)
array(['Bračko', 'M.', ''], dtype=object)
array(['Browder', 'T. E.', ''], dtype=object)
array(['Červenkov', 'D.', ''], dtype=object)
array(['Chang', 'P.', ''], dtype=object)
array(['Chekelian', 'V.', ''], dtype=object)
array(['Chen', 'A.', ''], dtype=object)
array(['Cheon', 'B. G.', ''], dtype=object)
array(['Chilikin', 'K.', ''], dtype=object)
array(['Cho', 'K.', ''], dtype=object)
array(['Choi', 'S. -K.', ''], dtype=object)
array(['Choi', 'Y.', ''], dtype=object)
array(['Cinabro', 'D.', ''], dtype=object)
array(['Dash', 'N.', ''], dtype=object)
array(['Di Carlo', 'S.', ''], dtype=object)
array(['Drásal', 'Z.', ''], dtype=object)
array(['Dutta', 'D.', ''], dtype=object)
array(['Eidelman', 'S.', ''], dtype=object)
array(['Farhat', 'H.', ''], dtype=object)
array(['Fast', 'J. E.', ''], dtype=object)
array(['Ferber', 'T.', ''], dtype=object)
array(['Fulsom', 'B. G.', ''], dtype=object)
array(['Gaur', 'V.', ''], dtype=object)
array(['Gabyshev', 'N.', ''], dtype=object)
array(['Garmash', 'A.', ''], dtype=object)
array(['Gillard', 'R.', ''], dtype=object)
array(['Goldenzweig', 'P.', ''], dtype=object)
array(['Golob', 'B.', ''], dtype=object)
array(['Haba', 'J.', ''], dtype=object)
array(['Hara', 'T.', ''], dtype=object)
array(['Hayasaka', 'K.', ''], dtype=object)
array(['Hayashii', 'H.', ''], dtype=object)
array(['Hedges', 'M. T.', ''], dtype=object)
array(['Hou', 'W. -S.', ''], dtype=object)
array(['Iijima', 'T.', ''], dtype=object)
array(['Inami', 'K.', ''], dtype=object)
array(['Inguglia', 'G.', ''], dtype=object)
array(['Ishikawa', 'A.', ''], dtype=object)
array(['Itoh', 'R.', ''], dtype=object)
array(['Jaegle', 'I.', ''], dtype=object)
array(['Joffe', 'D.', ''], dtype=object)
array(['Joo', 'K. K.', ''], dtype=object)
array(['Julius', 'T.', ''], dtype=object)
array(['Kang', 'K. H.', ''], dtype=object)
array(['Katrenko', 'P.', ''], dtype=object)
array(['Kawasaki', 'T.', ''], dtype=object)
array(['Kichimi', 'H.', ''], dtype=object)
array(['Kiesling', 'C.', ''], dtype=object)
array(['Kim', 'D. Y.', ''], dtype=object)
array(['Kim', 'H. J.', ''], dtype=object)
array(['Kim', 'J. B.', ''], dtype=object)
array(['Kim', 'K. T.', ''], dtype=object)
array(['Kim', 'M. J.', ''], dtype=object)
array(['Kim', 'S. H.', ''], dtype=object)
array(['Kim', 'Y. J.', ''], dtype=object)
array(['Kodyš', 'P.', ''], dtype=object)
array(['Korpar', 'S.', ''], dtype=object)
array(['Kotchetkov', 'D.', ''], dtype=object)
array(['Križan', 'P.', ''], dtype=object)
array(['Krokovny', 'P.', ''], dtype=object)
array(['Kuhr', 'T.', ''], dtype=object)
array(['Kulasiri', 'R.', ''], dtype=object)
array(['Kuzmin', 'A.', ''], dtype=object)
array(['Kwon', 'Y. -J.', ''], dtype=object)
array(['Lange', 'J. S.', ''], dtype=object)
array(['Li', 'C. H.', ''], dtype=object)
array(['Li', 'L.', ''], dtype=object)
array(['Li', 'Y.', ''], dtype=object)
array(['Gioi', 'L. Li', ''], dtype=object)
array(['Libby', 'J.', ''], dtype=object)
array(['Liventsev', 'D.', ''], dtype=object)
array(['Lubej', 'M.', ''], dtype=object)
array(['Luo', 'T.', ''], dtype=object)
array(['Masuda', 'M.', ''], dtype=object)
array(['Matsuda', 'T.', ''], dtype=object)
array(['Matvienko', 'D.', ''], dtype=object)
array(['Miyabayashi', 'K.', ''], dtype=object)
array(['Miyata', 'H.', ''], dtype=object)
array(['Mizuk', 'R.', ''], dtype=object)
array(['Moon', 'H. K.', ''], dtype=object)
array(['Mori', 'T.', ''], dtype=object)
array(['Nakao', 'M.', ''], dtype=object)
array(['Nanut', 'T.', ''], dtype=object)
array(['Nath', 'K. J.', ''], dtype=object)
array(['Natkaniec', 'Z.', ''], dtype=object)
array(['Nayak', 'M.', ''], dtype=object)
array(['Niiyama', 'M.', ''], dtype=object)
array(['Nisar', 'N. K.', ''], dtype=object)
array(['Nishida', 'S.', ''], dtype=object)
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array(['Pulvermacher', 'C.', ''], dtype=object)
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array(['Sakai', 'Y.', ''], dtype=object)
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array(['Santelj', 'L.', ''], dtype=object)
array(['Sanuki', 'T.', ''], dtype=object)
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array(['Schneider', 'O.', ''], dtype=object)
array(['Schnell', 'G.', ''], dtype=object)
array(['Schwanda', 'C.', ''], dtype=object)
array(['Seino', 'Y.', ''], dtype=object)
array(['Senyo', 'K.', ''], dtype=object)
array(['Sevior', 'M. E.', ''], dtype=object)
array(['Shebalin', 'V.', ''], dtype=object)
array(['Shibata', 'T. -A.', ''], dtype=object)
array(['Shiu', 'J. -G.', ''], dtype=object)
array(['Shwartz', 'B.', ''], dtype=object)
array(['Simon', 'F.', ''], dtype=object)
array(['Sokolov', 'A.', ''], dtype=object)
array(['Solovieva', 'E.', ''], dtype=object)
array(['Starič', 'M.', ''], dtype=object)
array(['Strube', 'J. F.', ''], dtype=object)
array(['Sumihama', 'M.', ''], dtype=object)
array(['Sumiyoshi', 'T.', ''], dtype=object)
array(['Suzuki', 'K.', ''], dtype=object)
array(['Takizawa', 'M.', ''], dtype=object)
array(['Tamponi', 'U.', ''], dtype=object)
array(['Tanida', 'K.', ''], dtype=object)
array(['Tenchini', 'F.', ''], dtype=object)
array(['Uchida', 'M.', ''], dtype=object)
array(['Uglov', 'T.', ''], dtype=object)
array(['Unno', 'Y.', ''], dtype=object)
array(['Uno', 'S.', ''], dtype=object)
array(['Urquijo', 'P.', ''], dtype=object)
array(['Usov', 'Y.', ''], dtype=object)
array(['Van Hulse', 'C.', ''], dtype=object)
array(['Varner', 'G.', ''], dtype=object)
array(['Vorobyev', 'V.', ''], dtype=object)
array(['Wang', 'C. H.', ''], dtype=object)
array(['Wang', 'M. -Z.', ''], dtype=object)
array(['Wang', 'P.', ''], dtype=object)
array(['Watanabe', 'Y.', ''], dtype=object)
array(['Won', 'E.', ''], dtype=object)
array(['Yamashita', 'Y.', ''], dtype=object)
array(['Ye', 'H.', ''], dtype=object)
array(['Yelton', 'J.', ''], dtype=object)
array(['Zhang', 'Z. P.', ''], dtype=object)
array(['Zhilich', 'V.', ''], dtype=object)
array(['Zhukova', 'V.', ''], dtype=object)
array(['Zhulanov', 'V.', ''], dtype=object)
array(['Zupanc', 'A.', ''], dtype=object)]
|
6,403 |
1711.02583
|
Griselda Figueroa Aguirre
|
Ernesto F. Eiroa, Griselda Figueroa-Aguirre
|
Spherical thin shells in F(R) gravity: construction and stability
|
13 pages, 2 figures; v2: improved version, new references added
|
Eur. Phys. J. C (2018) 78:54
|
10.1140/epjc/s10052-018-5518-5
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a broad class of spherical thin shells of matter in F(R) gravity.
We show that the corresponding junction conditions determine the equation of
state between the energy density and the pressure/tension at the surface. We
analyze the stability of the static configurations under perturbations
preserving the symmetry. We apply the formalism to the construction of charged
bubbles and we find that there exist stable static configurations for a
suitable set of the parameters of the model.
|
[{'version': 'v1', 'created': 'Tue, 7 Nov 2017 16:16:08 GMT'}
{'version': 'v2', 'created': 'Tue, 23 Jan 2018 14:23:19 GMT'}]
|
2020-07-22
|
[array(['Eiroa', 'Ernesto F.', ''], dtype=object)
array(['Figueroa-Aguirre', 'Griselda', ''], dtype=object)]
|
6,404 |
2302.11979
|
Pierre-Fran\c{c}ois Massiani
|
Pierre-Fran\c{c}ois Massiani, Mona Buisson-Fenet, Friedrich Solowjow,
Florent Di Meglio, Sebastian Trimpe
|
Data-Driven Observability Analysis for Nonlinear Stochastic Systems
|
Under review, may be subject to changes. 9 pages, 3 figures
| null | null | null |
eess.SY cs.LG cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Distinguishability and, by extension, observability are key properties of
dynamical systems. Establishing these properties is challenging, especially
when no analytical model is available and they are to be inferred directly from
measurement data. The presence of noise further complicates this analysis, as
standard notions of distinguishability are tailored to deterministic systems.
We build on distributional distinguishability, which extends the deterministic
notion by comparing distributions of outputs of stochastic systems. We first
show that both concepts are equivalent for a class of systems that includes
linear systems. We then present a method to assess and quantify distributional
distinguishability from output data. Specifically, our quantification measures
how much data is required to tell apart two initial states, inducing a
continuous spectrum of distinguishability. We propose a statistical test to
determine a threshold above which two states can be considered distinguishable
with high confidence. We illustrate these tools by computing distinguishability
maps over the state space in simulation, then leverage the test to compare
sensor configurations on hardware.
|
[{'version': 'v1', 'created': 'Thu, 23 Feb 2023 12:51:03 GMT'}]
|
2023-02-24
|
[array(['Massiani', 'Pierre-François', ''], dtype=object)
array(['Buisson-Fenet', 'Mona', ''], dtype=object)
array(['Solowjow', 'Friedrich', ''], dtype=object)
array(['Di Meglio', 'Florent', ''], dtype=object)
array(['Trimpe', 'Sebastian', ''], dtype=object)]
|
6,405 |
1106.0200
|
Christoph Thaele
|
Christoph Thaele
|
Hausdorff dimension of visibility sets for well-behaved continuum
percolation in the hyperbolic plane
| null |
Braz. J. Probab. Stat. 28, 73-82 (2014)
| null | null |
math.PR math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let Z be a so-called well-behaved percolation, i.e. a certain random closed
set in the hyperbolic plane, whose law is invariant under all isometries; for
example the covered region in a Poisson Boolean model. The Hausdorff-dimension
of the set of directions is determined in terms of the $\alpha$-value of Z in
which visibility from a fixed point to the ideal boundary of the hyperbolic
plane is possible within Z. Moreover, the Hausdorff-dimension of the set of
(hyperbolic) lines through a fixed point contained in Z is calculated. Thereby
several conjectures raised by Benjamini, Jonasson, Schramm and Tykesson are
confirmed.
|
[{'version': 'v1', 'created': 'Wed, 1 Jun 2011 15:07:33 GMT'}
{'version': 'v2', 'created': 'Tue, 14 Jun 2011 08:47:37 GMT'}]
|
2014-07-08
|
[array(['Thaele', 'Christoph', ''], dtype=object)]
|
6,406 |
0708.1253
|
Vladimir S. Gerdjikov
|
V. S. Gerdjikov (Institute for Nuclear Research and Nuclear Energy,
Bulgarian Academy of Sciences, Sofia, Bulgaria) D. J. Kaup (Department of
Mathematics, University of Central Florida, Orlando, Florida, USA) N. A.
Kostov (Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy
of Sciences, Sofia, Bulgaria), T. I. Valchev (Institute for Nuclear Research
and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria)
|
How many types of soliton solutions do we know?
|
LaTeX, 24 pages, no figures
| null | null | null |
nlin.SI nlin.PS
| null |
We consider several ways of how one could classify the various types of
soliton solutions related to nonlinear evolution equations which are solvable
by the inverse scattering method. In doing so we make use of the fundamental
analytic solutions, the dressing procedure, the reduction technique and other
tools characteristic for that method.
|
[{'version': 'v1', 'created': 'Thu, 9 Aug 2007 12:08:30 GMT'}]
|
2007-08-10
|
[array(['Gerdjikov', 'V. S.', '',
'Institute for Nuclear Research and Nuclear Energy,\n Bulgarian Academy of Sciences, Sofia, Bulgaria'],
dtype=object)
array(['Kaup', 'D. J.', '',
'Department of\n Mathematics, University of Central Florida, Orlando, Florida, USA'],
dtype=object)
array(['Kostov', 'N. A.', '',
'Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy\n of Sciences, Sofia, Bulgaria'],
dtype=object)
array(['Valchev', 'T. I.', '',
'Institute for Nuclear Research\n and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria'],
dtype=object) ]
|
6,407 |
2010.00997
|
Luca Fossati
|
L. Fossati, D. Shulyak, A. G. Sreejith, T. Koskinen, M. E. Young, P.
E. Cubillos, L. M. Lara, K. France, M. Rengel, P. W. Cauley, J. D. Turner, A.
Wyttenbach, F. Yan
|
A data-driven approach to constraining the atmospheric temperature
structure of KELT-9b
|
Accepted for publication by A&A
|
A&A 643, A131 (2020)
|
10.1051/0004-6361/202039061
| null |
astro-ph.EP astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Context. Observationally constraining the atmospheric temperature-pressure
(TP) profile of exoplanets is an important step forward for improving planetary
atmosphere models, further enabling one to place the detection of spectral
features and the measurement of atomic and molecular abundances through
transmission and emission spectroscopy on solid ground. Aims. The aim is to
constrain the TP profile of the ultra-hot Jupiter KELT-9b by fitting synthetic
spectra to the observed H$\alpha$ and H$\beta$ lines and identify why
self-consistent planetary TP models are unable to fit the observations.
Methods. We construct 126 one-dimensional TP profiles varying the lower and
upper atmospheric temperatures, as well as the location and gradient of the
temperature rise. For each TP profile, we compute transmission spectra of the
H$\alpha$ and H$\beta$ lines employing the Cloudy radiative transfer code,
which self-consistently accounts for non-local thermodynamic equilibrium (NLTE)
effects. Results. The TP profiles leading to best fit the observations are
characterised by an upper atmospheric temperature of 10000-11000 K and by an
inverted temperature profile at pressures higher than 10$^{-4}$ bar. We find
that the assumption of local thermodynamic equilibrium (LTE) leads to
overestimate the level population of excited hydrogen by several orders of
magnitude, and hence to significantly overestimate the strength of the Balmer
lines. The chemical composition of the best fitting models indicate that the
high upper atmospheric temperature is most likely driven by metal
photoionisation and that FeII and FeIII have comparable abundances at pressures
lower than 10$^{-6}$ bar, possibly making the latter detectable. Conclusions.
Modelling the atmospheres of ultra-hot Jupiters requires one to account for
metal photoionisation. [abridged]
|
[{'version': 'v1', 'created': 'Fri, 2 Oct 2020 13:44:36 GMT'}]
|
2020-11-18
|
[array(['Fossati', 'L.', ''], dtype=object)
array(['Shulyak', 'D.', ''], dtype=object)
array(['Sreejith', 'A. G.', ''], dtype=object)
array(['Koskinen', 'T.', ''], dtype=object)
array(['Young', 'M. E.', ''], dtype=object)
array(['Cubillos', 'P. E.', ''], dtype=object)
array(['Lara', 'L. M.', ''], dtype=object)
array(['France', 'K.', ''], dtype=object)
array(['Rengel', 'M.', ''], dtype=object)
array(['Cauley', 'P. W.', ''], dtype=object)
array(['Turner', 'J. D.', ''], dtype=object)
array(['Wyttenbach', 'A.', ''], dtype=object)
array(['Yan', 'F.', ''], dtype=object)]
|
6,408 |
2106.03842
|
Nathanan Tantivasadakarn
|
Nathanan Tantivasadakarn, Wenjie Ji, Sagar Vijay
|
Non-Abelian Hybrid Fracton Orders
|
17+11 pages, 4 figures, 7 tables. Added discussion on planons
supported in multiple layers. Published version
|
Phys. Rev. B 104, 115117 (2021)
|
10.1103/PhysRevB.104.115117
| null |
cond-mat.str-el quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce lattice gauge theories which describe three-dimensional, gapped
quantum phases exhibiting the phenomenology of both conventional
three-dimensional topological orders and fracton orders, starting from a finite
group $G$, a choice of an Abelian normal subgroup $N$, and a choice of
foliation structure. These hybrid fracton orders -- examples of which were
introduced in arXiv:2102.09555 -- can also host immobile, point-like
excitations that are non-Abelian, and therefore give rise to a protected
degeneracy. We construct solvable lattice models for these orders which
interpolate between a conventional, three-dimensional $G$ gauge theory and a
pure fracton order, by varying the choice of normal subgroup $N$. We
demonstrate that certain universal data of the topological excitations and
their mobilities are directly related to the choice of $G$ and $N$, and also
present complementary perspectives on these orders: certain orders may be
obtained by gauging a global symmetry which enriches a particular fracton
order, by either fractionalizing on or permuting the excitations with
restricted mobility, while certain hybrid orders can be obtained by condensing
excitations in a stack of initially decoupled, two-dimensional topological
orders.
|
[{'version': 'v1', 'created': 'Mon, 7 Jun 2021 17:56:26 GMT'}
{'version': 'v2', 'created': 'Sat, 11 Sep 2021 23:37:45 GMT'}]
|
2021-09-14
|
[array(['Tantivasadakarn', 'Nathanan', ''], dtype=object)
array(['Ji', 'Wenjie', ''], dtype=object)
array(['Vijay', 'Sagar', ''], dtype=object)]
|
6,409 |
1409.2041
|
Olteanu Anda Georgiana
|
Anda Olteanu and Volkmar Welker
|
The Buchberger resolution
|
Mistake in the formulation of Cor. 2.4 corrected
| null | null | null |
math.AC math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We define the Buchberger resolution, which is a graded free resolution of a
monomial ideal in a polynomial ring. Its construction uses a generalization of
the Buchberger graph and encodes much of the combinatorics of the Buchberger
algorithm. The Buchberger resolution is a cellular resolution that coincides
with the Scarf resolution for generic monomial ideals, which is the case when
it is minimal. The simplicial complex underlying the Buchberger resolution is
of interest for its own sake and its combinatorics is not fully understood. We
close with a conjecture on the clique complex of the Buchberger graph.
|
[{'version': 'v1', 'created': 'Sat, 6 Sep 2014 18:18:26 GMT'}
{'version': 'v2', 'created': 'Thu, 11 Sep 2014 06:23:01 GMT'}]
|
2014-09-12
|
[array(['Olteanu', 'Anda', ''], dtype=object)
array(['Welker', 'Volkmar', ''], dtype=object)]
|
6,410 |
1302.4354
|
Gabriele Cescutti
|
Gabriele Cescutti, Cristina Chiappini, Raphael Hirschi, Georges Meynet
and Urs Frischknecht
|
The s-process in the Galactic halo: the fifth signature of spinstars in
the early Universe?
|
14 pages, 7 figures, minor changes to match published version in A&A
|
A&A 553, A51 (2013)
|
10.1051/0004-6361/201220809
| null |
astro-ph.GA astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Very old halo stars were previously found to show at least four different
abundance 'anomalies', which models of fast rotating massive stars (spinstars)
can successfully account for: rise of N/O and C/O, low 12C/13C and a
primary-like evolution of Be and B. Here we show the impact of these same stars
in the enrichment of Sr and Ba in the early Universe. We study if the s-process
production of fast rotating massive stars can offer an explanation for the
observed spread in [Sr/Ba] ratio in halo stars with metallicity [Fe/H]< -2.5.
By means of a chemical inhomogeneous model we compute the enrichment of Sr and
Ba by massive stars in the Galactic halo. Our model takes into account, for the
first time, the contribution of spinstars. Our model (combining an r-process
contribution with a s-process from fast rotating massive stars) is able to
reproduce for the first time the observed scatter in the [Sr/Ba] ratio at
[Fe/H]< -2.5. Toward higher metallicities, the stochasticity of the star
formation fades away due to the increasing number of exploding and enriching
stars, and as a consequence the predicted scatter decreases. Our scenario is
again based on the existence of spinstars in the early Universe. Very old halo
stars were previously found to show at least four other abundance 'anomalies',
which rotating models of massive stars can successfully account for. Our
results provide a 5th independent signature of the existence of fast rotating
massive stars: an early enrichment of the Universe in s-process elements.
|
[{'version': 'v1', 'created': 'Mon, 18 Feb 2013 17:10:44 GMT'}
{'version': 'v2', 'created': 'Mon, 6 May 2013 10:21:15 GMT'}]
|
2013-05-07
|
[array(['Cescutti', 'Gabriele', ''], dtype=object)
array(['Chiappini', 'Cristina', ''], dtype=object)
array(['Hirschi', 'Raphael', ''], dtype=object)
array(['Meynet', 'Georges', ''], dtype=object)
array(['Frischknecht', 'Urs', ''], dtype=object)]
|
6,411 |
2105.06803
|
Kiyoharu Kawana
|
Satoshi Iso, Kiyoharu Kawana and Kengo Shimada
|
Axion-CMB Scenario in Supercooled Universe
|
33 pages, 6 figures
|
Phys. Rev. D 104, 063525 (2021)
|
10.1103/PhysRevD.104.063525
|
KEK-TH-2317
|
hep-ph astro-ph.CO hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Axion-CMB scenario is an interesting possibility to explain the temperature
anisotropy of the cosmic microwave background (CMB) by primordial fluctuations
of the QCD axion \cite{Iso:2020pzv}. In this scenario, fluctuations of
radiations are generated by an energy exchange between axions and radiations,
which results in the correlation between the primordial axion fluctuations and
the CMB anisotropies. Consequently, the cosmological observations stringently
constrain a model of the axion and the early history of the universe. In
particular, we need a large energy fraction $\Omega_A^{}$ of the axion at the
QCD phase transition, but it must become tiny at the present universe to
suppress the isocurvature power spectrum. One of natural cosmological scenarios
to realize such a situation is the thermal inflation which can sufficiently
dilute the axion abundance. Thermal inflation occurs in various models. In this
paper, we focus on a classically conformal (CC) $B$-$L$ model with a QCD axion.
In this model, the early universe undergoes a long supercooling era of the
$B$-$L$ and electroweak symmetries, and thermal inflation naturally occurs.
Thus it can be a good candidate for the axion-CMB scenario. But the axion
abundance at the QCD transition is shown to be insufficient in the original CC
$B$-$L$ model. To overcome the situation, we extend the model by introducing
$N$ scalar fields $S$ (either massive or massless) and consider a novel
cosmological history such that the $O(N)$ and the $B$-$L$ sectors evolve almost
separately in the early universe. We find that all the necessary conditions for
the axion-CMB scenario can be satisfied in some parameter regions for massless
$S$ fields, typically $N\sim 10^{19}$ and the mass of $B$-$L$ gauge boson
around $5-10$ TeV.
|
[{'version': 'v1', 'created': 'Fri, 14 May 2021 12:49:26 GMT'}]
|
2021-09-22
|
[array(['Iso', 'Satoshi', ''], dtype=object)
array(['Kawana', 'Kiyoharu', ''], dtype=object)
array(['Shimada', 'Kengo', ''], dtype=object)]
|
6,412 |
1110.1826
|
Daniel Kotlar
|
Daniel Kotlar and Ran Ziv
|
On Serial Symmetric Exchanges of Matroid Bases
| null |
J. Graph Theory 1002/jgt.21675 (2012)
| null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study some properties of a serial (i.e. one-by-one) symmetric exchange of
elements of two disjoint bases of a matroid. We show that any two elements of
one base have a serial symmetric exchange with some two elements of the other
base. As a result, we obtain that any two disjoint bases in a matroid of rank 4
have a full serial symmetric exchange.
|
[{'version': 'v1', 'created': 'Sun, 9 Oct 2011 12:06:50 GMT'}
{'version': 'v2', 'created': 'Wed, 12 Oct 2011 05:24:57 GMT'}
{'version': 'v3', 'created': 'Mon, 26 Mar 2012 12:44:52 GMT'}]
|
2013-04-19
|
[array(['Kotlar', 'Daniel', ''], dtype=object)
array(['Ziv', 'Ran', ''], dtype=object)]
|
6,413 |
cond-mat/0611688
|
Carlos Benavides
|
Carlos L. Benavides and Claudia M. Ojeda
|
Decoherence of Macroscopic States at Finite Temperatures
|
9 pages, 3 figures
| null | null | null |
cond-mat.mes-hall math-ph math.MP physics.chem-ph physics.optics quant-ph
| null |
We study the macroscopic superposition of light coherent states of the type
Schrodinger cat states; analizying, in particular, the role of the temperature
in the decoherence processes, characteristic of the superposition of
macroscopic states. The method we use here is based on the Master equation
formalism, introducing an original approach. We use a modified Mandel function
that is well adapted to the problem. This work is motivated by the experiments
proposed by S. Haroche and collaborators in the 90's. In these experiments two
Rydberg atoms were sent to a cavity in which a coherent state had been
previously injected, monitoring the decay of quantum states due to dissipation.
We find Haroche and collaborator's result at zero temperature and we predict
the behavior of the field states in the cavity at finite temperatures.
|
[{'version': 'v1', 'created': 'Mon, 27 Nov 2006 23:16:00 GMT'}]
|
2012-07-11
|
[array(['Benavides', 'Carlos L.', ''], dtype=object)
array(['Ojeda', 'Claudia M.', ''], dtype=object)]
|
6,414 |
0711.1372
|
Brandon Lawton
|
B. Lawton (1), C. W. Churchill (1), B. A. York (2), S. L. Ellison (2),
T. P. Snow (3), R. A. Johnson (4), S. G. Ryan (5), C. R. Benn (6) ((1) New
Mexico State University, Las Cruces, USA, (2) University of Victoria,
Victoria, Canada, (3) University of Colorado, Boulder, USA, (4) Oxford
Astrophysics, Oxford, UK, (5) University of Hertfordshire, Hatfield, UK, (6)
Isaac Newton Group, Santa Cruz de La Palma, Spain)
|
Searching for the Precursors of Life in External Galaxies
|
6 pages, 2 figures
| null | null | null |
astro-ph
| null |
Are the organic molecules crucial for life on Earth abundant in early-epoch
galaxies? To address this, we searched for organic molecules in extragalactic
sources via their absorption features, known as diffuse interstellar bands
(DIBs). There is strong evidence that DIBs are associated with polycyclic
aromatic hydrocarbons (PAHs) and carbon chains. Galaxies with a preponderance
of DIBs may be the most likely places in which to expect life.
We use the method of quasar absorption lines to probe intervening early-epoch
galaxies for the DIBs. We present the equivalent width measurements of DIBs in
one neutral hydrogen (HI) abundant galaxy and limits for five DIB bands in six
other HI-rich galaxies (damped Lyman-alpha systems--DLAs). Our results reveal
that HI-rich galaxies are dust poor and have significantly lower reddening than
known DIB-rich Milky Way environments. We find that DIBs in HI-rich galaxies do
not show the same correlation with hydrogen abundance as observed in the Milky
Way; the extragalactic DIBs are underabundant by as much as 10 times. The lower
limit gas-to-dust ratios of four of the HI-rich early epoch galaxies are much
higher than the gas-to-dust ratios found in the Milky Way. Our results suggest
that the organic molecules responsible for the DIBs are underabundant in
HI-rich early epoch galaxies relative to the Milky Way.
|
[{'version': 'v1', 'created': 'Thu, 8 Nov 2007 22:46:26 GMT'}]
|
2007-11-12
|
[array(['Lawton', 'B.', ''], dtype=object)
array(['Churchill', 'C. W.', ''], dtype=object)
array(['York', 'B. A.', ''], dtype=object)
array(['Ellison', 'S. L.', ''], dtype=object)
array(['Snow', 'T. P.', ''], dtype=object)
array(['Johnson', 'R. A.', ''], dtype=object)
array(['Ryan', 'S. G.', ''], dtype=object)
array(['Benn', 'C. R.', ''], dtype=object)]
|
6,415 |
astro-ph/0604568
|
Patricia Sanchez-Blazquez
|
P. Sanchez-Blazquez (1, Ecole Polytechnique Federale de Lausanne,
Switzerland), J. Gorgas (2, Universidad Complutense de Madrid, Spain), N.
Cardiel (2), J.J. Gonzalez (3, Universidad Autonoma de Mexico, Mexico)
|
Stellar populations of early-type galaxies in different environments II.
Ages and metallicities
|
19 pages, accepted for publication in A&A
| null |
10.1051/0004-6361:20064845
| null |
astro-ph
| null |
This is the second paper of a series devoted to study the stellar content of
early-type galaxies. The goal of the series is to set constraints on the
evolutionary status of these objects. We use a new set of models which include
an improved stellar library (MILES) to derive simple stellar population
(SSP)-equivalent parameters in a sample of 98 early-type galaxies. The sample
contains galaxies in the field, poor groups, and galaxies in the Virgo and Coma
clusters.We find that low-density environment galaxies span a larger range in
SSP age and metallicity than their counterparts in high density environments,
with a tendency for lower sigma galaxies to be younger. Early-type galaxies in
low-density environments appear on average ~1.5 Gyr younger and more metal rich
than their counterparts in high density environments. The sample of low-density
environment galaxies shows an age metallicity relation in which younger
galaxies are found to be more metal rich, but only when metallicity is measured
with a Fe-sensitive index. Conversely, there is no age-metallicity relation
when the metallicity is measured with a Mg sensitive index. The
mass-metallicity relation is only appreciable for the low-density environment
galaxies when the metallicity is measured with a Mg-sensitive index and not
when the metallicity is measured with other indicators. On the contrary, this
relation exists for the high-density environment galaxies independently of the
indicator used to measure the metallicity. This suggests a dependence of the
mass-metallicity relation on the environment of the galaxies. Our data favour a
scenario in which galaxies in low density environments have suffered a more
extended star formation history than the galaxies in the Coma cluster, which
appear to host more homogenous stellar populations.
|
[{'version': 'v1', 'created': 'Thu, 27 Apr 2006 14:32:41 GMT'}]
|
2009-11-11
|
[array(['Sanchez-Blazquez', 'P.', '',
'1, Ecole Polytechnique Federale de Lausanne,\n Switzerland'],
dtype=object)
array(['Gorgas', 'J.', '', '2, Universidad Complutense de Madrid, Spain'],
dtype=object)
array(['Cardiel', 'N.', '', '3, Universidad Autonoma de Mexico, Mexico'],
dtype=object)
array(['Gonzalez', 'J. J.', '',
'3, Universidad Autonoma de Mexico, Mexico'], dtype=object)]
|
6,416 |
0901.2089
|
Lev Steinberg
|
Lev Steinberg
|
Elastic Plates Motions with Transverse Variation of Microrotation
|
21 pages
| null | null | null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The purpose of this paper is to present a new mathematical model for the
dynamics of thin Cosserat elastic plates. Our approach, which is based on a
generalization of the classical Reissner-Mindlin plate theory, takes into
account the transverse variation of microrotation and corresponding
microintertia of the the elastic plates. The model assumes polynomial
approximations over the plate thickness of asymmetric stress, couple stress,
displacement, and microrotation, which are consistent with the elastic
equilibrium, boundary conditions and the constitutive relationships. Based on
the generalized Hellinger-Prange-Reissner variational principle for the
dynamics and strain-displacement relation we obtain the complete dynamic theory
of Cosserat plate.
Key words: Cosserat materials, elastic plates, transverse microrotation,
variational principle, elastodynamics
|
[{'version': 'v1', 'created': 'Wed, 14 Jan 2009 19:30:11 GMT'}
{'version': 'v2', 'created': 'Tue, 3 Feb 2009 13:02:33 GMT'}]
|
2009-02-03
|
[array(['Steinberg', 'Lev', ''], dtype=object)]
|
6,417 |
2006.03475
|
Dmytro Kolenov
|
D. Kolenov, S.F. Pereira
|
Machine learning techniques applied for detection of nanoparticles on
surfaces using Coherent Fourier Scatterometry
|
Manuscript in preparation
| null |
10.1364/OE.395233
| null |
physics.optics eess.SP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present an efficient machine learning framework for detection and
classification of nanoparticles on surfaces that are detected in the far-field
with Coherent Fourier Scatterometry (CFS). We study silicon wafers contaminated
with spherical polystyrene (PSL) nanoparticles (with diameters down to
$\lambda/8$). Starting from the raw data, the proposed framework does the
pre-processing and particle search. Further, the unsupervised clustering
algorithms, such as K-means and DBSCAN, are customized to be used to define the
groups of signals that are attributed to a single scatterer. Finally, the
particle count versus particle size histogram is generated.
The challenging cases of the high density of scatterers, noise and drift in
the dataset are treated. We take advantage of the prior information on the size
of the scatterers to minimize the false-detections and as a consequence,
provide higher discrimination ability and more accurate particle counting.
Numerical and real experiments are conducted to demonstrate the performance of
the proposed search and cluster-assessment techniques. Our results illustrate
that the proposed algorithm can detect surface contaminants correctly and
effectively.
|
[{'version': 'v1', 'created': 'Fri, 5 Jun 2020 14:17:03 GMT'}]
|
2020-07-15
|
[array(['Kolenov', 'D.', ''], dtype=object)
array(['Pereira', 'S. F.', ''], dtype=object)]
|
6,418 |
2003.05730
|
Jintang Li
|
Liang Chen, Jintang Li, Jiaying Peng, Tao Xie, Zengxu Cao, Kun Xu,
Xiangnan He, Zibin Zheng, Bingzhe Wu
|
A Survey of Adversarial Learning on Graphs
|
Preprint; 16 pages, 2 figures
| null | null | null |
cs.LG cs.AI stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Deep learning models on graphs have achieved remarkable performance in
various graph analysis tasks, e.g., node classification, link prediction, and
graph clustering. However, they expose uncertainty and unreliability against
the well-designed inputs, i.e., adversarial examples. Accordingly, a line of
studies has emerged for both attack and defense addressed in different graph
analysis tasks, leading to the arms race in graph adversarial learning. Despite
the booming works, there still lacks a unified problem definition and a
comprehensive review. To bridge this gap, we investigate and summarize the
existing works on graph adversarial learning tasks systemically. Specifically,
we survey and unify the existing works w.r.t. attack and defense in graph
analysis tasks, and give appropriate definitions and taxonomies at the same
time. Besides, we emphasize the importance of related evaluation metrics,
investigate and summarize them comprehensively. Hopefully, our works can
provide a comprehensive overview and offer insights for the relevant
researchers. Latest advances in graph adversarial learning are summarized in
our GitHub repository
https://github.com/EdisonLeeeee/Graph-Adversarial-Learning.
|
[{'version': 'v1', 'created': 'Tue, 10 Mar 2020 12:48:00 GMT'}
{'version': 'v2', 'created': 'Tue, 19 May 2020 13:43:57 GMT'}
{'version': 'v3', 'created': 'Tue, 5 Apr 2022 12:54:56 GMT'}]
|
2022-04-06
|
[array(['Chen', 'Liang', ''], dtype=object)
array(['Li', 'Jintang', ''], dtype=object)
array(['Peng', 'Jiaying', ''], dtype=object)
array(['Xie', 'Tao', ''], dtype=object)
array(['Cao', 'Zengxu', ''], dtype=object)
array(['Xu', 'Kun', ''], dtype=object)
array(['He', 'Xiangnan', ''], dtype=object)
array(['Zheng', 'Zibin', ''], dtype=object)
array(['Wu', 'Bingzhe', ''], dtype=object)]
|
6,419 |
1909.10334
|
Iman Mehrabinezhad
|
Peter Giesl, Sigurdur Hafstein, and Iman Mehrabinezhad
|
Computation and verification of contraction metrics for exponentially
stable equilibria
|
30 pages, 13 figures
| null | null | null |
math.DS cs.NA math.AP math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The determination of exponentially stable equilibria and their basin of
attraction for a dynamical system given by a general autonomous ordinary
differential equation can be achieved by means of a contraction metric. A
contraction metric is a Riemannian metric with respect to which the distance
between adjacent solutions decreases as time increases. The Riemannian metric
can be expressed by a matrix-valued function on the phase space.
The determination of a contraction metric can be achieved by approximately
solving a matrix-valued partial differential equation by mesh-free collocation
using Radial Basis Functions (RBF). However, so far no rigorous verification
that the computed metric is indeed a contraction metric has been provided.
In this paper, we combine the RBF method to compute a contraction metric with
the CPA method to rigorously verify it. In particular, the computed contraction
metric is interpolated by a continuous piecewise affine (CPA) metric at the
vertices of a fixed triangulation, and by checking finitely many inequalities,
we can verify that the interpolation is a contraction metric. Moreover, we show
that, using sufficiently dense collocation points and a sufficiently fine
triangulation, we always succeed with the construction and verification. We
apply the method to two examples.
|
[{'version': 'v1', 'created': 'Fri, 20 Sep 2019 15:21:29 GMT'}]
|
2019-09-24
|
[array(['Giesl', 'Peter', ''], dtype=object)
array(['Hafstein', 'Sigurdur', ''], dtype=object)
array(['Mehrabinezhad', 'Iman', ''], dtype=object)]
|
6,420 |
1103.5785
|
Ayan Paul
|
Ikaros I. Bigi, Ayan Paul, Stefan Recksiegel
|
Conclusions from CDF Results on CP Violation in D^0 \to \pi^+\pi^-,
K^+K^- and Future Tasks
|
11 pages, 1 figure. V2 has minor corrections and corresponds to the
published version
|
JHEP06 (2011) 089
|
10.1007/JHEP06(2011)089
|
UND-HEP-10-BIG 06, TUM-HEP-803/11
|
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Within the Standard Model (SM) one predicts both direct and indirect CP
violation in D^0 \to \pi^+\pi^-, K^+K^- transitions, although the effects are
tiny: Indirect CP asymmetry cannot exceed O(10^{-4}), probably even O(10^{-5});
direct effects are estimated at not larger than 10^{-4}. At B factories direct
and indirect asymmetries have been studied with <t>/\tau_{D^0} ~ 1; no CP
asymmetry was found with an upper bound of about 1%. CDF has shown intriguing
data on CP violation in D^0 \to \pi^+\pi^- [K^+K^-] with <t>/\tau_{D^0} ~ 2.4
[2.65]. Also, CDF has not seen any CP violation. For direct CP asymmetry, CDF
has a sensitivity similar to the combination of the B factories, yet for
indirect CP violation it yields a significantly smaller sensitivity of
a_{cp}^{ind}=(-0.01 +- 0.06_{stat} +- 0.05_{syst})% due to it being based on
longer decay times. New Physics models (NP) like Little Higgs Models with
T-Parity (LHT) can produce an indirect CP asymmetry up to 1%; CDF's findings
thus cover the upper range of realistic NP predictions ~ 0.1 - 1%. One hopes
that LHCb and a Super-Flavour Factory will probe the lower range down to
~0.01%. Such non-ad-hoc NP like LHT cannot enhance direct CP violation
significantly over the SM level in D^0 \to \pi^+\pi^-, K^+K^- and D^{\pm} \to
\pi^{\pm}K^+K^- transitions, but others might well do so.
|
[{'version': 'v1', 'created': 'Tue, 29 Mar 2011 22:29:52 GMT'}
{'version': 'v2', 'created': 'Wed, 22 Jun 2011 15:04:20 GMT'}]
|
2011-06-23
|
[array(['Bigi', 'Ikaros I.', ''], dtype=object)
array(['Paul', 'Ayan', ''], dtype=object)
array(['Recksiegel', 'Stefan', ''], dtype=object)]
|
6,421 |
hep-ph/0611320
|
Kazunori Nakayama
|
Masahiro Kawasaki, Kazunori Nakayama
|
Affleck-Dine baryogenesis in anomaly-mediated SUSY breaking
|
17 pages, 4 figures; Minor corrections, added a reference
|
JCAP 0702:002,2007
|
10.1088/1475-7516/2007/02/002
| null |
hep-ph
| null |
It has been known that in anomaly-mediated SUSY breaking model Affleck-Dine
baryogenesis does not work due to trapping of Affleck-Dine field into
charge-breaking minima. We show that when finite-temperature effect is properly
taken into account and if reheating temperature is relatively high, the problem
of falling into charge breaking global minima can be avoided and hence
Affleck-Dine baryogenesis works. Moreover, for the LH_u flat direction we
obtain a constraint on the mass of neutrino.
|
[{'version': 'v1', 'created': 'Sun, 26 Nov 2006 09:52:54 GMT'}
{'version': 'v2', 'created': 'Fri, 2 Feb 2007 11:39:47 GMT'}]
|
2010-10-27
|
[array(['Kawasaki', 'Masahiro', ''], dtype=object)
array(['Nakayama', 'Kazunori', ''], dtype=object)]
|
6,422 |
hep-ex/0611001
|
Benjamin Kilminster
|
Ben Kilminster (for the CDF collaboration and the D0 collaboration)
|
Search for Low Mass Higgs at the Tevatron
|
ICHEP Moscow 2006 proceedings
| null | null | null |
hep-ex
| null |
We present CDF and D0 searches for a Standard Model Higgs boson produced
associatively with a W or Z boson at sqrt{s}=1.96 TeV using up to 1 fb^-1 of
analyzed Tevatron data collected from February 2002 to February 2006. For Higgs
masses less than 135 GeV/c^2, as is favored by experimental and theoretical
constraints, WH->lnubb, ZH->llbb, and ZH->nunubb are the most sensitive decay
channels to search for the Higgs boson. Both CDF and D0 have analyzed these
three channels and found no evidence for Higgs production, and therefore set
upper limits on the Higgs production cross-section. While the analyses are not
yet sensitive to Standard Model Higgs production, improvements in analysis
techniques are increasing sensitivity to the Higgs much faster than added
luminosity alone.
|
[{'version': 'v1', 'created': 'Tue, 31 Oct 2006 23:26:30 GMT'}]
|
2019-08-14
|
[array(['Kilminster', 'Ben', '',
'for the CDF collaboration and the D0 collaboration'], dtype=object)]
|
6,423 |
1607.01982
|
Nadir Matringe
|
Nadir Matringe and Omer Offen
|
Gamma factors root numbers and distinction
|
To appear in Canad. J. Math
| null | null | null |
math.RT math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study a relation between distinction and special values of local
invariants for representations of the general linear group over a quadratic
extension of $p$-adic fields. We show that the local Rankin-Selberg root number
of any pair of distinguished representation is trivial and as a corollary we
obtain an analogue for the global root number of any pair of distinguished
cuspidal representations. We further study the extent to which the gamma factor
at $1/2$ is trivial for distinguished representations as well as the converse
problem.
|
[{'version': 'v1', 'created': 'Thu, 7 Jul 2016 12:16:59 GMT'}
{'version': 'v2', 'created': 'Sat, 1 Apr 2017 13:48:55 GMT'}]
|
2017-04-04
|
[array(['Matringe', 'Nadir', ''], dtype=object)
array(['Offen', 'Omer', ''], dtype=object)]
|
6,424 |
1911.05931
|
Leo Furkan Isikdogan
|
Chyuan-Tyng Wu, Leo F. Isikdogan, Sushma Rao, Bhavin Nayak, Timo
Gerasimow, Aleksandar Sutic, Liron Ain-kedem, Gilad Michael
|
VisionISP: Repurposing the Image Signal Processor for Computer Vision
Applications
| null |
IEEE International Conference on Image Processing (ICIP), 2019,
pp. 4624-4628
|
10.1109/ICIP.2019.8803607
| null |
eess.IV cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Traditional image signal processors (ISPs) are primarily designed and
optimized to improve the image quality perceived by humans. However, optimal
perceptual image quality does not always translate into optimal performance for
computer vision applications. We propose a set of methods, which we
collectively call VisionISP, to repurpose the ISP for machine consumption.
VisionISP significantly reduces data transmission needs by reducing the
bit-depth and resolution while preserving the relevant information. The blocks
in VisionISP are simple, content-aware, and trainable. Experimental results
show that VisionISP boosts the performance of a subsequent computer vision
system trained to detect objects in an autonomous driving setting. The results
demonstrate the potential and the practicality of VisionISP for computer vision
applications.
|
[{'version': 'v1', 'created': 'Thu, 14 Nov 2019 04:19:28 GMT'}]
|
2019-11-15
|
[array(['Wu', 'Chyuan-Tyng', ''], dtype=object)
array(['Isikdogan', 'Leo F.', ''], dtype=object)
array(['Rao', 'Sushma', ''], dtype=object)
array(['Nayak', 'Bhavin', ''], dtype=object)
array(['Gerasimow', 'Timo', ''], dtype=object)
array(['Sutic', 'Aleksandar', ''], dtype=object)
array(['Ain-kedem', 'Liron', ''], dtype=object)
array(['Michael', 'Gilad', ''], dtype=object)]
|
6,425 |
2303.15560
|
Jacinta Torres
|
Leonardo Patimo, Jacinta Torres
|
Atoms and charge in type $C_2$
|
69 pages, comments welcome
| null | null | null |
math.RT math.AG math.CO
|
http://creativecommons.org/licenses/by/4.0/
|
We construct atomic decompositions for crystals of type $C_{2}$ and define a
charge statistic on them, thus providing positive combinatorial formulas for
Kostka-Foulkes polynomials associated to them together with a natural geometric
interpretation.
|
[{'version': 'v1', 'created': 'Mon, 27 Mar 2023 19:17:14 GMT'}]
|
2023-03-29
|
[array(['Patimo', 'Leonardo', ''], dtype=object)
array(['Torres', 'Jacinta', ''], dtype=object)]
|
6,426 |
2106.12515
|
Yian Chen
|
Yian Chen, Jeremy Hoskins, Yuehaw Khoo, Michael Lindsey
|
Committor functions via tensor networks
| null | null | null | null |
math.NA cs.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a novel approach for computing committor functions, which describe
transitions of a stochastic process between metastable states. The committor
function satisfies a backward Kolmogorov equation, and in typical
high-dimensional settings of interest, it is intractable to compute and store
the solution with traditional numerical methods. By parametrizing the committor
function in a matrix product state/tensor train format and using a similar
representation for the equilibrium probability density, we solve the
variational formulation of the backward Kolmogorov equation with linear time
and memory complexity in the number of dimensions. This approach bypasses the
need for sampling the equilibrium distribution, which can be difficult when the
distribution has multiple modes. Numerical results demonstrate the
effectiveness of the proposed method for high-dimensional problems.
|
[{'version': 'v1', 'created': 'Wed, 23 Jun 2021 16:32:54 GMT'}
{'version': 'v2', 'created': 'Thu, 24 Jun 2021 04:57:29 GMT'}
{'version': 'v3', 'created': 'Tue, 3 Aug 2021 02:07:19 GMT'}]
|
2021-08-04
|
[array(['Chen', 'Yian', ''], dtype=object)
array(['Hoskins', 'Jeremy', ''], dtype=object)
array(['Khoo', 'Yuehaw', ''], dtype=object)
array(['Lindsey', 'Michael', ''], dtype=object)]
|
6,427 |
1305.3551
|
Markus Hanl
|
M. Hanl, A. Weichselbaum, T. A. Costi, F. Mallet, L. Saminadayar, C.
B\"auerle, J. von Delft
|
Iron impurities in gold and silver: Comparison of transport measurements
to numerical renormalization group calculations exploiting non-Abelian
symmetries
|
11 pages, 6 figures, published version
|
Phys. Rev. B 88, 075146 (2013)
|
10.1103/PhysRevB.88.075146
| null |
cond-mat.str-el cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider iron impurities in the noble metals gold and silver and compare
experimental data for the resistivity and decoherence rate to numerical
renormalization group results. By exploiting non-Abelian symmetries we show
improved numerical data for both quantities as compared to previous
calculations [Costi et al., Phys. Rev. Lett. 102, 056802 (2009)], using the
discarded weight as criterion to reliably judge the quality of convergence of
the numerical data. In addition we also carry out finite-temperature
calculations for the magnetoresistivity of fully screened Kondo models with S =
1/2, 1 and 3/2, and compare the results with available measurements for iron in
silver, finding excellent agreement between theory and experiment for the
spin-3/2 three-channel Kondo model. This lends additional support to the
conclusion of Costi et al. that the latter model provides a good effective
description of the Kondo physics of iron impurities in gold and silver.
|
[{'version': 'v1', 'created': 'Wed, 15 May 2013 17:18:34 GMT'}
{'version': 'v2', 'created': 'Thu, 5 Sep 2013 11:41:55 GMT'}]
|
2013-09-06
|
[array(['Hanl', 'M.', ''], dtype=object)
array(['Weichselbaum', 'A.', ''], dtype=object)
array(['Costi', 'T. A.', ''], dtype=object)
array(['Mallet', 'F.', ''], dtype=object)
array(['Saminadayar', 'L.', ''], dtype=object)
array(['Bäuerle', 'C.', ''], dtype=object)
array(['von Delft', 'J.', ''], dtype=object)]
|
6,428 |
0901.4620
|
Johannes Wallner
|
Alexander I. Bobenko, Helmut Pottmann, Johannes Wallner
|
A curvature theory for discrete surfaces based on mesh parallelity
| null |
Math. Annalen 348 (2010), 1-24
| null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a general theory of curvatures of discrete surfaces equipped with
edgewise parallel Gauss images, and where mean and Gaussian curvatures of faces
are derived from the faces' areas and mixed areas. Remarkably these notions are
capable of unifying notable previously defined classes of surfaces, such as
discrete isothermic minimal surfaces and surfaces of constant mean curvature.
We discuss various types of natural Gauss images, the existence of principal
curvatures, constant curvature surfaces, Christoffel duality, Koenigs nets,
contact element nets, s-isothermic nets, and interesting special cases such as
discrete Delaunay surfaces derived from elliptic billiards.
|
[{'version': 'v1', 'created': 'Thu, 29 Jan 2009 16:08:59 GMT'}]
|
2017-09-06
|
[array(['Bobenko', 'Alexander I.', ''], dtype=object)
array(['Pottmann', 'Helmut', ''], dtype=object)
array(['Wallner', 'Johannes', ''], dtype=object)]
|
6,429 |
2209.13989
|
Sanjay Mukherjee
|
Sanjay Mukherjee, Kamal Lochan Patra, Binod Kumar Sahoo
|
On the minimum cut-sets of the power graph of a finite cyclic group
| null | null | null | null |
math.CO
|
http://creativecommons.org/licenses/by/4.0/
|
The power graph $\mathcal{P}(G)$ of a finite group $G$ is the simple graph
with vertex set $G$, in which two distinct vertices are adjacent if one of them
is a power of the other. For an integer $n\geq 2$, let $C_n$ denote the cyclic
group of order $n$ and let $r$ be the number of distinct prime divisors of $n$.
The minimum cut-sets of $\mathcal{P}(C_n)$ are characterized in \cite{cps} for
$r\leq 3$. In this paper, for $r\geq 4$, we identify certain cut-sets of
$\mathcal{P}(C_n)$ such that any minimum cut-set of $\mathcal{P}(C_n)$ must be
one of them.
|
[{'version': 'v1', 'created': 'Wed, 28 Sep 2022 10:35:03 GMT'}]
|
2022-09-29
|
[array(['Mukherjee', 'Sanjay', ''], dtype=object)
array(['Patra', 'Kamal Lochan', ''], dtype=object)
array(['Sahoo', 'Binod Kumar', ''], dtype=object)]
|
6,430 |
2205.09424
|
Chen Gong
|
Chen Gong, Xin Fang and Li Cheng
|
Band degeneration and evolution in nonlinear triatomic chain
superlattices
|
14 pages,11 figures
| null | null | null |
cond-mat.other nlin.AO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Nonlinear superlattices exhibit unique features allowing for wave
manipulations. Despite the increasing attention received, the underlying
physical mechanisms and the evolution process of the band structures and
bandgaps in strongly nonlinear superlattices remain unclear. Here we establish
and examine strongly nonlinear superlattice models (three triatomic models) to
show the evolution process of typical nonlinear band structures based on
analytical and numerical approaches. We find that the strongly nonlinear
superlattices present particular band degeneration and bifurcation, accompanied
with the vibration mode transfer in their unit cells. The evolution processes
and the physical mechanisms of the band degeneration in different models are
clarified with the consideration of the mode transfer. The observed
degeneration may occur as the shifting, bifurcating, shortening, merging or
disappearing of dispersion curves, all depending on the arrangement of the
coupled nonlinear elements. Meanwhile, the dimension of the unit cell reduces,
alongside changes in the frequency range and mechanisms (Bragg and local
resonance) of the bandgaps. These findings answer some foundamental questions
peritinent to the study of nonlinear periodic structures, nonlinear crystals
and nonlinear metamaterials, which are of interest to the broad community of
physics
|
[{'version': 'v1', 'created': 'Thu, 19 May 2022 09:41:27 GMT'}]
|
2022-05-20
|
[array(['Gong', 'Chen', ''], dtype=object)
array(['Fang', 'Xin', ''], dtype=object)
array(['Cheng', 'Li', ''], dtype=object)]
|
6,431 |
1803.10187
|
Ryan Park
|
Ryan S. Park, D. J. Pisano, T. Joseph W. Lazio, Paul W. Chodas, and
Shantanu P. Naidu
|
Search for OH 18-cm radio emission from 1I/2017 U1 with the Green Bank
telescope
|
accepted for publication in Astronomical Journal, 7 pages, 1 figure,
1 table
| null |
10.3847/1538-3881/aab78d
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper reports the first OH 18-cm line observation of the first detected
interstellar object 1I/2017 U1 (`Oumuamua) using the Green Bank Telescope. We
have observed the OH lines at 1665.402 MHz, 1667.359, and 1720.53 MHz
frequencies with a spectral resolution of 357 Hz (approximately 0.06
km-s^{-1}). At the time of the observation, `Oumuamua was at topocentric
distance and velocity of 1.07 au and 63.4 km-s^{-1}, respectively, or at
heliocentric distance and velocity of 1.8 au and 39 km-s^{-1}, respectively.
Based on a detailed data reduction and an analogy-based inversion, our final
results confirm the asteroidal origin of `Oumuamua (as discussed in Meech et
al., 2017) with an upper bound of OH production of Q[OH] < 0.17 x 10^{28}
s^{-1}.
|
[{'version': 'v1', 'created': 'Tue, 27 Mar 2018 17:15:28 GMT'}]
|
2018-04-25
|
[array(['Park', 'Ryan S.', ''], dtype=object)
array(['Pisano', 'D. J.', ''], dtype=object)
array(['Lazio', 'T. Joseph W.', ''], dtype=object)
array(['Chodas', 'Paul W.', ''], dtype=object)
array(['Naidu', 'Shantanu P.', ''], dtype=object)]
|
6,432 |
1007.0285
|
Wolfgang Bietenholz
|
Wolfgang Bietenholz
|
Chiral Fermions on the Lattice
|
7 pages, 2 figures, talk presented at the XII Mexican Workshop on
Particles and Fields, Mazatlan, Nov. 2009
|
AIP Conf.Proc.1361:245-251,2011
|
10.1063/1.3622708
| null |
hep-lat hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the last century the non-perturbative regularization of chiral fermions
was a long-standing problem. We review how this problem was finally overcome by
the formulation of a modified but exact form of chiral symmetry on the lattice.
This also provides a sound definition of the topological charge of lattice
gauge configurations. We illustrate a variety of applications to QCD in the p-,
the epsilon- and the delta-regime, where simulation results can now be related
to Random Matrix Theory and Chiral Perturbation Theory. The latter contains Low
Energy Constants as free parameters, and we comment on their evaluation from
first principles of QCD.
|
[{'version': 'v1', 'created': 'Fri, 2 Jul 2010 00:55:58 GMT'}]
|
2011-09-28
|
[array(['Bietenholz', 'Wolfgang', ''], dtype=object)]
|
6,433 |
1404.4034
|
Marco Varisco
|
Holger Reich and Marco Varisco
|
On the Adams isomorphism for equivariant orthogonal spectra
|
Final version, to appear in Algebraic & Geometric Topology. 58 pages
|
Algebr. Geom. Topol. 16 (2016), no. 3, 1493-1566
|
10.2140/agt.2016.16.1493
| null |
math.AT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We give a natural construction and a direct proof of the Adams isomorphism
for equivariant orthogonal spectra. More precisely, for any finite group G, any
normal subgroup N of G, and any orthogonal G-spectrum X, we construct a natural
map A of orthogonal G/N-spectra from the homotopy N-orbits of X to the derived
N-fixed points of X, and we show that A is a stable weak equivalence if X is
cofibrant and N-free. This recovers a theorem of Lewis, May, and Steinberger in
the equivariant stable homotopy category, which in the case of suspension
spectra was originally proved by Adams. We emphasize that our Adams map A is
natural even before passing to the homotopy category. One of the tools we
develop is a replacement-by-Omega-spectra construction with good functorial
properties, which we believe is of independent interest.
|
[{'version': 'v1', 'created': 'Tue, 15 Apr 2014 19:37:22 GMT'}
{'version': 'v2', 'created': 'Thu, 9 Oct 2014 22:31:01 GMT'}
{'version': 'v3', 'created': 'Tue, 22 Sep 2015 16:03:12 GMT'}]
|
2016-07-05
|
[array(['Reich', 'Holger', ''], dtype=object)
array(['Varisco', 'Marco', ''], dtype=object)]
|
6,434 |
1510.08581
|
Rohit Dilip Holkar Dr
|
Rohit Dilip Holkar
|
Composition of topological correspondences
|
21 pages, 5 Figures. Added a new reference ([4]), some typos
corrected. An altered version of this article is accepted for publication in
the Journal of Operator Theory
| null | null | null |
math.OA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the previous article, we proved that a topological correspondence
$(X,\lambda)$ from a locally compact groupoid with a Haar system $(G,\alpha)$
to another one, $(H,\beta)$, produces a $C^*$-correspondence $\mathcal{H}(X)$
from $C^*(G,\alpha)$ to $C^*(H,\beta)$. In the present article, we describe how
to form a composite of two topological correspondences when the bispaces are
Hausdorff and second countable in addition to being locally compact.
|
[{'version': 'v1', 'created': 'Thu, 29 Oct 2015 07:14:06 GMT'}
{'version': 'v2', 'created': 'Tue, 3 May 2016 13:19:59 GMT'}
{'version': 'v3', 'created': 'Mon, 30 May 2016 19:50:05 GMT'}
{'version': 'v4', 'created': 'Wed, 19 Oct 2016 10:59:34 GMT'}]
|
2016-10-20
|
[array(['Holkar', 'Rohit Dilip', ''], dtype=object)]
|
6,435 |
2205.02580
|
Victor Cohen
|
Victor Cohen and Axel Parmentier
|
Future memories are not needed for large classes of POMDPs
|
arXiv admin note: text overlap with arXiv:2012.00645
| null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Optimal policies for partially observed Markov decision processes (POMDPs)
are history-dependent: Decisions are made based on the entire history of
observation. Memoryless policies, which take decisions based on the last
observation only, are generally considered useless in the literature because we
can construct POMDP instances for which optimal memoryless policies are
arbitrarily worse than history-dependent ones. Our purpose is to challenge this
belief. We show that optimal memoryless policies can be computed efficiently
using mixed integer linear programming (MILP), and perform reasonably well on a
wide range of instances from the literature. When strengthened with valid
inequalities, the linear relaxation of this MILP provides high quality
upper-bounds on the value of an optimal history dependent policy. Furthermore,
when used with a finite horizon POMDP problem with memoryless policies as
rolling optimization problem, a model predictive control approach leads to an
efficient history-dependent policy, which we call the short memory in the
future (SMF) policy. Basically, the SMF policy leverages these memoryless
policies to build an approximation of the Bellman value function. Numerical
experiments show the efficiency of our approach on benchmark instances from the
literature.
|
[{'version': 'v1', 'created': 'Thu, 5 May 2022 11:23:53 GMT'}]
|
2022-05-06
|
[array(['Cohen', 'Victor', ''], dtype=object)
array(['Parmentier', 'Axel', ''], dtype=object)]
|
6,436 |
2301.10278
|
Tiberiu Harko
|
Amine Bouali, Himanshu Chaudhary, Rattanasak Hama, Tiberiu Harko,
Sorin V. Sabau, Marco San Mart\'in
|
Cosmological tests of the osculating Barthel-Kropina dark energy model
|
23 pages, 16 figures, accepted for publication in EPJC
| null |
10.1140/epjc/s10052-023-11265-9
| null |
gr-qc astro-ph.CO hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We further investigate the dark energy model based on the Finsler geometry
inspired osculating Barthel-Kropina cosmology. The Barthel-Kropina cosmological
approach is based on the introduction of a Barthel connection in an osculating
Finsler geometry, with the connection having the property that it is the
Levi-Civita connection of a Riemannian metric. From the generalized Friedmann
equations of the Barthel-Kropina model, obtained by assuming that the
background Riemannian metric is of the Friedmann-Lemaitre-Robertson-Walker
type, an effective geometric dark energy component can be generated, with the
effective, geometric type pressure, satisfying a linear barotropic type
equation of state. The cosmological tests, and comparisons with observational
data of this dark energy model are considered in detail. To constrain the
Barthel-Kropina model parameters, and the parameter of the equation of state,
we use 57 Hubble data points, and the Pantheon Supernovae Type Ia data sample.
The st statistical analysis is performed by using Markov Chain Monte Carlo
(MCMC) simulations. A detailed comparison with the standard $\Lambda$CDM model
is also performed, with the Akaike information criterion (AIC), and the
Bayesian information criterion (BIC) used as the two model selection tools. The
statefinder diagnostics consisting of jerk and snap parameters, and the $Om(z)$
diagnostics are also considered for the comparative study of the
Barthel-Kropina and $\Lambda$CDM cosmologies. Our results indicate that the
Barthel-Kropina dark energy model gives a good description of the observational
data, and thus it can be considered a viable alternative of the $\Lambda$CDM
model.
|
[{'version': 'v1', 'created': 'Tue, 24 Jan 2023 19:25:07 GMT'}]
|
2023-02-22
|
[array(['Bouali', 'Amine', ''], dtype=object)
array(['Chaudhary', 'Himanshu', ''], dtype=object)
array(['Hama', 'Rattanasak', ''], dtype=object)
array(['Harko', 'Tiberiu', ''], dtype=object)
array(['Sabau', 'Sorin V.', ''], dtype=object)
array(['Martín', 'Marco San', ''], dtype=object)]
|
6,437 |
1310.6744
|
Daniel Gruen
|
D. Gruen, S. Seitz, F. Brimioulle, R. Kosyra, J. Koppenhoefer, C.-H.
Lee, R. Bender, A. Riffeser, T. Eichner, T. Weidinger, M. Bierschenk
|
Weak lensing analysis of SZ-selected clusters of galaxies from the SPT
and Planck surveys
|
added two more clusters, matches published version; 42 pages, 30
figures
| null |
10.1093/mnras/stu949
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present the weak lensing analysis of the Wide-Field Imager SZ Cluster of
galaxy (WISCy) sample, a set of 12 clusters of galaxies selected for their
Sunyaev-Zel'dovich (SZ) effect. After developing new and improved methods for
background selection and determination of geometric lensing scaling factors
from absolute multi-band photometry in cluster fields, we compare the weak
lensing mass estimate with public X-ray and SZ data. We find consistency with
hydrostatic X-ray masses with no significant bias, no mass dependent bias and
less than 20% intrinsic scatter and constrain fgas,500c=0.128+0.029-0.023. We
independently calibrate the South Pole Telescope significance-mass relation and
find consistency with previous results. The comparison of weak lensing mass and
Planck Compton parameters, whether extracted self-consistently with a
mass-observable relation (MOR) or using X-ray prior information on cluster
size, shows significant discrepancies. The deviations from the MOR strongly
correlate with cluster mass and redshift. This could be explained either by a
significantly shallower than expected slope of Compton decrement versus mass
and a corresponding problem in the previous X-ray based mass calibration, or a
size or redshift dependent bias in SZ signal extraction.
|
[{'version': 'v1', 'created': 'Thu, 24 Oct 2013 20:00:01 GMT'}
{'version': 'v2', 'created': 'Fri, 30 May 2014 20:00:03 GMT'}]
|
2015-06-17
|
[array(['Gruen', 'D.', ''], dtype=object)
array(['Seitz', 'S.', ''], dtype=object)
array(['Brimioulle', 'F.', ''], dtype=object)
array(['Kosyra', 'R.', ''], dtype=object)
array(['Koppenhoefer', 'J.', ''], dtype=object)
array(['Lee', 'C. -H.', ''], dtype=object)
array(['Bender', 'R.', ''], dtype=object)
array(['Riffeser', 'A.', ''], dtype=object)
array(['Eichner', 'T.', ''], dtype=object)
array(['Weidinger', 'T.', ''], dtype=object)
array(['Bierschenk', 'M.', ''], dtype=object)]
|
6,438 |
2102.01286
|
Rou Zhong
|
Rou Zhong, Shishi Liu, Haocheng Li, Jingxiao Zhang
|
Functional principal component analysis estimator for non-Gaussian data
| null | null | null | null |
stat.ME
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Functional principal component analysis (FPCA) could become invalid when data
involve non-Gaussian features. Therefore, we aim to develop a general FPCA
method to adapt to such non-Gaussian cases. A Kenall's $\tau$ function, which
possesses identical eigenfunctions as covariance function, is constructed. The
particular formulation of Kendall's $\tau$ function makes it less insensitive
to data distribution. We further apply it to the estimation of FPCA and study
the corresponding asymptotic consistency. Moreover, the effectiveness of the
proposed method is demonstrated through a comprehensive simulation study and an
application to the physical activity data collected by a wearable accelerometer
monitor.
|
[{'version': 'v1', 'created': 'Tue, 2 Feb 2021 03:52:22 GMT'}
{'version': 'v2', 'created': 'Tue, 17 Aug 2021 12:41:18 GMT'}]
|
2021-08-18
|
[array(['Zhong', 'Rou', ''], dtype=object)
array(['Liu', 'Shishi', ''], dtype=object)
array(['Li', 'Haocheng', ''], dtype=object)
array(['Zhang', 'Jingxiao', ''], dtype=object)]
|
6,439 |
1205.1613
|
Vincenzo F. Cardone Dr
|
Vincenzo F. Cardone, Ninfa Radicella, Luca Parisi
|
Constraining massive gravity with recent cosmological data
|
10 pages, 1 figure, 2 tables, accepted for publication on Physical
Review D
| null |
10.1103/PhysRevD.85.124005
| null |
astro-ph.CO gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A covariant formulation of a theory with a massive graviton and no negative
energy state has been recently proposed as an alternative to the usual General
Relativity framework. For a spatially flat homogenous and isotropic universe,
the theory introduces modified Friedmann equations where the standard matter
term is supplemented by four effective fluids mimicking dust, cosmological
constant, quintessence and stiff matter, respectively. We test the viability of
this massive gravity formulation by contrasting its theoretical prediction to
the Hubble diagram as traced by Type Ia Supernovae (SNeIa) and Gamma Ray Bursts
(GRBs), the $H(z)$ measurements from passively evolving galaxies, Baryon
Acoustic Oscillations (BAOs) from galaxy surveys and the distance priors from
the Cosmic Microwave Background Radiation (CMBR) anisotropy spectrum. It turns
out that the model is indeed able to very well fit this large dataset thus
offering a viable alternative to the usual dark energy framework. We finally
set stringent constraints on its parameters also narrowing down the allowed
range for the graviton mass.
|
[{'version': 'v1', 'created': 'Tue, 8 May 2012 07:32:18 GMT'}]
|
2015-06-05
|
[array(['Cardone', 'Vincenzo F.', ''], dtype=object)
array(['Radicella', 'Ninfa', ''], dtype=object)
array(['Parisi', 'Luca', ''], dtype=object)]
|
6,440 |
hep-th/0304098
|
Jarah Evslin
|
Jarah Evslin
|
A Torsion Correction to the RR 4-Form Fieldstrength
|
10 Pages, 1 eps figure
|
JHEP 0311:037,2003
|
10.1088/1126-6708/2003/11/037
| null |
hep-th
| null |
The shifted quantization condition of the M-theory 4-form G_4 is well-known.
The most naive generalization to type IIA string theory fails, an orientifold
counterexample was found by Hori in hep-th/9805141. In this note we use
D2-brane anomaly cancellation to find the corresponding shifted quantization
condition in IIA. Our analysis is consistent with the known O4-plane tensions
if we include a torsion correction to the usual construction of G_4 from C_3, B
and G_2. The resulting Bianchi identities enforce that RR fluxes lift to
K-theory classes.
|
[{'version': 'v1', 'created': 'Thu, 10 Apr 2003 14:31:57 GMT'}]
|
2014-11-18
|
[array(['Evslin', 'Jarah', ''], dtype=object)]
|
6,441 |
1407.1737
|
Touseef Darzi Yousuf
|
Touseef Yousuf Darzi, Aminuddin Zabi, Pallavi M
|
An Approach for Controlling Faults in Wireless Sensor Networks Using
Clustering
|
7 pages, 11 figures, Published with International Journal of
Engineering Trends and Technology (IJETT). arXiv admin note: text overlap
with arXiv:1209.4751 by other authors without attribution
|
IJETT, Vol.12, No.6, pp.286-292, Jun 2014. ISSN:2231-5381
|
10.14445/22315381/IJETT-V12P256
| null |
cs.NI
|
http://creativecommons.org/licenses/by/3.0/
|
Fault control and tolerance in wireless sensor network is a challenging
problem because of limited energy, bandwidth, and computational complexity.
While facing numerous threats these severely resource constrained nodes are
responsible for data collection, data processing, localization, time
synchronization aggregation and data forwarding. One of the effective
approaches to control and tolerate these threats is through clustering. In this
paper we present a new method called Efficient Fault Control Mechanism for
fault controlling in wireless sensor networks based on clustering and
cluster-head selection. Simulation results show Efficient Fault Control
Mechanism has better performance over state of art methods.
|
[{'version': 'v1', 'created': 'Mon, 7 Jul 2014 15:12:52 GMT'}]
|
2014-07-08
|
[array(['Darzi', 'Touseef Yousuf', ''], dtype=object)
array(['Zabi', 'Aminuddin', ''], dtype=object)
array(['M', 'Pallavi', ''], dtype=object)]
|
6,442 |
2103.14517
|
Deniz Engin
|
Deniz Engin, Fran\c{c}ois Schnitzler, Ngoc Q. K. Duong, Yannis
Avrithis
|
On the hidden treasure of dialog in video question answering
|
ICCV 2021
| null | null | null |
cs.CV
|
http://creativecommons.org/licenses/by-sa/4.0/
|
High-level understanding of stories in video such as movies and TV shows from
raw data is extremely challenging. Modern video question answering (VideoQA)
systems often use additional human-made sources like plot synopses, scripts,
video descriptions or knowledge bases. In this work, we present a new approach
to understand the whole story without such external sources. The secret lies in
the dialog: unlike any prior work, we treat dialog as a noisy source to be
converted into text description via dialog summarization, much like recent
methods treat video. The input of each modality is encoded by transformers
independently, and a simple fusion method combines all modalities, using soft
temporal attention for localization over long inputs. Our model outperforms the
state of the art on the KnowIT VQA dataset by a large margin, without using
question-specific human annotation or human-made plot summaries. It even
outperforms human evaluators who have never watched any whole episode before.
Code is available at https://engindeniz.github.io/dialogsummary-videoqa
|
[{'version': 'v1', 'created': 'Fri, 26 Mar 2021 15:17:01 GMT'}
{'version': 'v2', 'created': 'Thu, 19 Aug 2021 12:13:27 GMT'}]
|
2021-08-20
|
[array(['Engin', 'Deniz', ''], dtype=object)
array(['Schnitzler', 'François', ''], dtype=object)
array(['Duong', 'Ngoc Q. K.', ''], dtype=object)
array(['Avrithis', 'Yannis', ''], dtype=object)]
|
6,443 |
cond-mat/9612128
|
Loic Turban
|
L. Turban (1), F. Igloi (2 and 3) ((1) Henri Poincare University,
Nancy, (2) Research Institute for Solid State Physics, Budapest, (3)
University of Szeged)
|
Off-Diagonal Density Profiles and Conformal Invariance
|
8 pages, Plain TeX, macros included, minor corrections
|
J. Phys. A 30 (1997) L105-L111
|
10.1088/0305-4470/30/5/006
| null |
cond-mat.stat-mech
| null |
Off-diagonal profiles of local densities (e.g. order parameter or energy
density) are calculated at the bulk critical point, by conformal methods, for
different types of boundary conditions (free, fixed and mixed). Such profiles,
which are defined by a non-vanishing matrix element of the appropriate operator
between the ground state and the corresponding lowest excited state of the
strip Hamiltonian, enter into the expression of two-point correlation functions
on a strip. They are of interest in the finite-size scaling study of bulk and
surface critical behaviour since they allow the elimination of regular
contributions. The conformal profiles, which are obtained through a conformal
transformation of the correlation functions from the half-plane to the strip,
are in agreement with the results of a direct calculation, for the energy
density of the two-dimensional Ising model.
|
[{'version': 'v1', 'created': 'Sat, 14 Dec 1996 11:12:29 GMT'}
{'version': 'v2', 'created': 'Mon, 16 Dec 1996 13:41:21 GMT'}
{'version': 'v3', 'created': 'Thu, 9 Jan 1997 11:05:26 GMT'}
{'version': 'v4', 'created': 'Thu, 4 Sep 1997 15:00:53 GMT'}
{'version': 'v5', 'created': 'Fri, 19 Sep 1997 15:06:57 GMT'}]
|
2009-10-28
|
[array(['Turban', 'L.', '', '2 and 3'], dtype=object)
array(['Igloi', 'F.', '', '2 and 3'], dtype=object)]
|
6,444 |
0807.3659
|
Uwe Dorner
|
U. Dorner, R. Demkowicz-Dobrzanski, B. J. Smith, J. S. Lundeen, W.
Wasilewski, K. Banaszek and I. A. Walmsley
|
Optimal Quantum Phase Estimation
|
4 pages, 4 figures. Replaced with final version
|
Phys. Rev. Lett. 102, 040403 (2009)
|
10.1103/PhysRevLett.102.040403
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
By using a systematic optimization approach we determine quantum states of
light with definite photon number leading to the best possible precision in
optical two mode interferometry. Our treatment takes into account the
experimentally relevant situation of photon losses. Our results thus reveal the
benchmark for precision in optical interferometry. Although this boundary is
generally worse than the Heisenberg limit, we show that the obtained precision
beats the standard quantum limit thus leading to a significant improvement
compared to classical interferometers. We furthermore discuss alternative
states and strategies to the optimized states which are easier to generate at
the cost of only slightly lower precision.
|
[{'version': 'v1', 'created': 'Wed, 23 Jul 2008 13:27:28 GMT'}
{'version': 'v2', 'created': 'Fri, 6 Feb 2009 12:51:38 GMT'}]
|
2009-02-06
|
[array(['Dorner', 'U.', ''], dtype=object)
array(['Demkowicz-Dobrzanski', 'R.', ''], dtype=object)
array(['Smith', 'B. J.', ''], dtype=object)
array(['Lundeen', 'J. S.', ''], dtype=object)
array(['Wasilewski', 'W.', ''], dtype=object)
array(['Banaszek', 'K.', ''], dtype=object)
array(['Walmsley', 'I. A.', ''], dtype=object)]
|
6,445 |
hep-lat/9409006
| null |
S.Furui, A.M.Green and B.Masud
|
An Analysis of Four-quark Energies in SU(2) Lattice Monte Carlo using
the Flux-tube Symmetry:
|
(19 pages of Latex - 1 page of figures not included - sent on
request). Preprint HU-TFT-94-28
|
Nucl.Phys. A582 (1995) 682-696
|
10.1016/0375-9474(94)00483-4
| null |
hep-lat
| null |
Energies of four-quark systems calculated by the static quenched SU(2)
lattice Monte Carlo method are analyzed in $2\times 2$ bases for square,
rectangle, tilted rectangle, linear and quadrilateral geometry configurations
and in $3\times 3$ bases for a non-planar geometry configuration. For small
interquark distances, a lattice effect is taken into account by considering
perimeter dependent terms which are characterized by the cubic symmetry. It is
then found that a parameter $f$ - that can be identified as a gluon field
overlap factor - is rather well described by the form $exp(-[b_sE{\cal
A}+\sqrt{b_s}F{\cal P}])$, where ${\cal A}$ and ${\cal P}$ are the area and
perimeter mainly defined by the positions of the four quarks, $b_s$ is the
string constant in the 2-quark potentials and $E,F$ are constants.
|
[{'version': 'v1', 'created': 'Thu, 8 Sep 1994 12:07:54 GMT'}]
|
2009-10-22
|
[array(['Furui', 'S.', ''], dtype=object)
array(['Green', 'A. M.', ''], dtype=object)
array(['Masud', 'B.', ''], dtype=object)]
|
6,446 |
2306.10988
|
Shengjie Zhu
|
Shengjie Zhu, Abhinav Kumar, Masa Hu and Xiaoming Liu
|
Tame a Wild Camera: In-the-Wild Monocular Camera Calibration
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
3D sensing for monocular in-the-wild images, e.g., depth estimation and 3D
object detection, has become increasingly important. However, the unknown
intrinsic parameter hinders their development and deployment. Previous methods
for the monocular camera calibration rely on specific 3D objects or strong
geometry prior, such as using a checkerboard or imposing a Manhattan World
assumption. This work solves the problem from the other perspective by
exploiting the monocular 3D prior. Our method is assumption-free and calibrates
the complete $4$ Degree-of-Freedom (DoF) intrinsic parameters. First, we
demonstrate intrinsic is solved from two well-studied monocular priors, i.e.,
monocular depthmap, and surface normal map. However, this solution imposes a
low-bias and low-variance requirement for depth estimation. Alternatively, we
introduce a novel monocular 3D prior, the incidence field, defined as the
incidence rays between points in 3D space and pixels in the 2D imaging plane.
The incidence field is a pixel-wise parametrization of the intrinsic invariant
to image cropping and resizing. With the estimated incidence field, a robust
RANSAC algorithm recovers intrinsic. We demonstrate the effectiveness of our
method by showing superior performance on synthetic and zero-shot testing
datasets. Beyond calibration, we demonstrate downstream applications in image
manipulation detection & restoration, uncalibrated two-view pose estimation,
and 3D sensing. Codes, models, and data will be held in
https://github.com/ShngJZ/WildCamera.
|
[{'version': 'v1', 'created': 'Mon, 19 Jun 2023 14:55:26 GMT'}]
|
2023-06-21
|
[array(['Zhu', 'Shengjie', ''], dtype=object)
array(['Kumar', 'Abhinav', ''], dtype=object)
array(['Hu', 'Masa', ''], dtype=object)
array(['Liu', 'Xiaoming', ''], dtype=object)]
|
6,447 |
1807.02275
|
Chol-Jun Yu
|
Song-Nam Hong, Song-Hyok Choe, Un-Gi Jong, Myong-San Pak, Chol-Jun Yu
|
The maximum interbubble distance in relation to the radius of spherical
stable nanobubble in liquid water: A molecular dynamics study
| null | null | null | null |
physics.chem-ph cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The mechanism of superstability of nanobubbles in liquid confirmed by many
experimental studies is still in debate since the classical diffusion predicts
their lifetime on the order of a few microseconds. In this work, we study the
requirement for bulk nanobubbles to be stable by using molecular dynamics
simulations. Periodic cubic cells with different cell sizes and different
initial radii are treated to simulate the nanobubble cluster, providing the
equilibrium bubble radius and the interbubble distance. We find out that for
nanobubble with a certain radius $R$ to be stable, the interbubble distance
should be smaller than the maximum interbubble distance $L^*$ being
proportional to $R^{4/3}$.
|
[{'version': 'v1', 'created': 'Fri, 6 Jul 2018 06:29:02 GMT'}
{'version': 'v2', 'created': 'Mon, 29 Oct 2018 09:25:22 GMT'}]
|
2018-10-30
|
[array(['Hong', 'Song-Nam', ''], dtype=object)
array(['Choe', 'Song-Hyok', ''], dtype=object)
array(['Jong', 'Un-Gi', ''], dtype=object)
array(['Pak', 'Myong-San', ''], dtype=object)
array(['Yu', 'Chol-Jun', ''], dtype=object)]
|
6,448 |
gr-qc/0505144
|
Ranjan Sharma
|
R Sharma, S Karmakar and S Mukherjee
|
Maximum mass of a cold compact star
|
18 pages including 4 *.eps figures. Submitted for publication
|
Int.J.Mod.Phys. D15 (2006) 405-418
|
10.1142/S0218271806008012
| null |
gr-qc
| null |
We calculate the maximum mass of the class of compact stars described by
Vaidya-Tikekar \cite{VT01} model. The model permits a simple method of
systematically fixing bounds on the maximum possible mass of cold compact stars
with a given value of radius or central density or surface density. The
relevant equations of state are also determined. Although simple, the model is
capable of describing the general features of the recently observed very
compact stars. For the calculation, no prior knowledge of the equation of state
(EOS) is required. This is in contrast to the earlier calculations for maximum
mass which were done by choosing first the relevant EOSs and using those to
solve the TOV equation with appropriate boundary conditions. The bounds
obtained by us are comparable and, in some cases, more restrictive than the
earlier results.
|
[{'version': 'v1', 'created': 'Sun, 29 May 2005 13:56:22 GMT'}]
|
2009-11-11
|
[array(['Sharma', 'R', ''], dtype=object)
array(['Karmakar', 'S', ''], dtype=object)
array(['Mukherjee', 'S', ''], dtype=object)]
|
6,449 |
1411.2534
|
Matthew Shultz
|
Matt Shultz, Gregg Wade, Thomas Rivinius, James Sikora, the MiMeS
Collaboration
|
Discovery of a Centrifugal Magnetosphere Around the He-Strong Magnetic
B1 Star ALS 3694
|
4 pages, 2 figures, Proceedings of 'Bright Emissaries: Be Stars as
Messengers of Star-Disk Physics', conference held at the University of
Western Ontario, Aug 10-14, 2014
| null | null | null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report the results of 6 nights of Canada-France-Hawaii Telescope
spectropolarimetric ESPaDOnS observations of the He-strong, magnetic B1 type
star ALS 3694. The longitudinal magnetic field is approximately 2 kG in all 6
observations, showing essentially no variation between nights. The H$\alpha$
line displays variable emission on all nights, peaking at high velocities
($\sim 3 v\sin{i}$). Given the presence of a strong ($B_{\rm d}>$6 kG) magnetic
field, and the similarity of the emission profile to that of other magnetic
B-type stars, we interpret the emission as a consequence of a centrifugal
magnetosphere.
|
[{'version': 'v1', 'created': 'Mon, 10 Nov 2014 18:51:49 GMT'}]
|
2014-11-11
|
[array(['Shultz', 'Matt', ''], dtype=object)
array(['Wade', 'Gregg', ''], dtype=object)
array(['Rivinius', 'Thomas', ''], dtype=object)
array(['Sikora', 'James', ''], dtype=object)
array(['Collaboration', 'the MiMeS', ''], dtype=object)]
|
6,450 |
1801.08100
|
Roberto J. L\'opez-Sastre
|
Carolina Redondo-Cabrera and Roberto J. L\'opez-Sastre
|
Unsupervised learning from videos using temporal coherency deep networks
| null |
Computer Vision and Image Understanding, 2018
|
10.1016/j.cviu.2018.08.003
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work we address the challenging problem of unsupervised learning from
videos. Existing methods utilize the spatio-temporal continuity in contiguous
video frames as regularization for the learning process. Typically, this
temporal coherence of close frames is used as a free form of annotation,
encouraging the learned representations to exhibit small differences between
these frames. But this type of approach fails to capture the dissimilarity
between videos with different content, hence learning less discriminative
features. We here propose two Siamese architectures for Convolutional Neural
Networks, and their corresponding novel loss functions, to learn from unlabeled
videos, which jointly exploit the local temporal coherence between contiguous
frames, and a global discriminative margin used to separate representations of
different videos. An extensive experimental evaluation is presented, where we
validate the proposed models on various tasks. First, we show how the learned
features can be used to discover actions and scenes in video collections.
Second, we show the benefits of such an unsupervised learning from just
unlabeled videos, which can be directly used as a prior for the supervised
recognition tasks of actions and objects in images, where our results further
show that our features can even surpass a traditional and heavily supervised
pre-training plus fine-tunning strategy.
|
[{'version': 'v1', 'created': 'Wed, 24 Jan 2018 17:51:32 GMT'}
{'version': 'v2', 'created': 'Thu, 11 Oct 2018 13:28:13 GMT'}]
|
2018-10-12
|
[array(['Redondo-Cabrera', 'Carolina', ''], dtype=object)
array(['López-Sastre', 'Roberto J.', ''], dtype=object)]
|
6,451 |
2301.12267
|
Saeed Nasseh
|
Saeed Nasseh, Maiko Ono, Yuji Yoshino
|
On the semifree resolutions of DG algebras over the enveloping DG
algebras
| null | null | null | null |
math.AC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The goal of this paper is to construct a semifree resolution for a
non-negatively graded strongly commutative DG algebra $B$ over the enveloping
DG algebra $B\otimes_AB$, where $A\subseteq B$ is a DG subalgebra and $B$ is
semifree over $A$. Our construction of such a semifree resolution uses the
notions of reduced bar resolution and tensor algebra of the shift of the
diagonal ideal.
|
[{'version': 'v1', 'created': 'Sat, 28 Jan 2023 18:48:00 GMT'}
{'version': 'v2', 'created': 'Sun, 25 Jun 2023 04:24:07 GMT'}]
|
2023-06-27
|
[array(['Nasseh', 'Saeed', ''], dtype=object)
array(['Ono', 'Maiko', ''], dtype=object)
array(['Yoshino', 'Yuji', ''], dtype=object)]
|
6,452 |
math/0601440
|
Alexey Kurnosenko
|
Alexey Kurnosenko (Institute for High Energy Physics)
|
Around Vogt's theorem
|
31+1 pages with 19 figures; typo & e-mail corrected
|
Journal of Mathematical Sciences, Vol. 161, No. 3, 2009, 405-418;
Vol. 175, No. 5, June, 2011, 517-527
| null |
preprint IHEP 2005-19
|
math.DG
| null |
Vogt's theorem, concerning boundary angles of a convex arc with monotonic
curvature (spiral arc), is taken as a starting point to establish basic
properties of spirals. The theorem is expanded by removing requirements of
convexity and curvature continuity; the cases of inflection and multiple
windings are considered. Positional restrictions for a spiral arc with two
given curvature elements at the endpoints are established, as well as the
necessary and sufficient conditions for the existence of such spiral.
Keywords: Vogt's theorem, spiral, inversive invariant, monotonic curvature,
lense, biarc, bilense.
|
[{'version': 'v1', 'created': 'Wed, 18 Jan 2006 14:34:05 GMT'}
{'version': 'v2', 'created': 'Tue, 6 Feb 2007 10:34:27 GMT'}]
|
2012-07-17
|
[array(['Kurnosenko', 'Alexey', '', 'Institute for High Energy Physics'],
dtype=object) ]
|
6,453 |
1512.08851
|
Andrei Pushkarev
|
Pushkarev Andrei, Zakharov Vladimir
|
Limited fetch revisited: comparison of wind input terms, in surface
waves modeling
| null | null | null | null |
physics.ao-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Results pertaining to numerical solutions of the Hasselmann kinetic equation
(HE), for wind driven sea spectra, in the fetch limited geometry, are
presented. Five versions of source functions, including the recently introduced
ZRP model, have been studied, for the exact expression of Snl and
high-frequency implicit dissipation, due to wave-breaking. Four of the five
experiments were done in the absence of spectral peak dissipation for various
Sin terms. They demonstrated the dominance of quadruplet wave-wave interaction,
in the energy balance, and the formation of self-similar regimes, of unlimited
wave energy growth, along the fetch. Between them was the ZRP model, which
strongly agreed with dozens of field observations performed in the seas and
lakes, since 1947. The fifth, the WAM3 wind input term experiment, used
additional spectral peak dissipation and reproduced the results of a previous,
similar, numerical simulation, but only supported the field experiments for
moderate fetches, demonstrating a total energy saturation at half of that of
the Pierson-Moscowits limit. The alternative framework for HE numerical
simulation is proposed, along with a set of tests, allowing one to select
physically-justified source terms.
|
[{'version': 'v1', 'created': 'Wed, 30 Dec 2015 05:07:28 GMT'}
{'version': 'v2', 'created': 'Sat, 19 Mar 2016 22:05:54 GMT'}]
|
2016-03-22
|
[array(['Andrei', 'Pushkarev', ''], dtype=object)
array(['Vladimir', 'Zakharov', ''], dtype=object)]
|
6,454 |
2210.04953
|
Ghazaleh Ardeshiri
|
Ghazaleh Ardeshiri, Azadeh Vosoughi
|
On Distributed Detection in EH-WSNs With Finite-State Markov Channel and
Limited Feedback
| null | null | null | null |
eess.SP
|
http://creativecommons.org/licenses/by/4.0/
|
We consider a network, tasked with solving binary distributed detection,
consisting of N sensors, a fusion center (FC), and a feedback channel from the
FC to sensors. Each sensor is capable of harvesting energy and is equipped with
a finite size battery to store randomly arrived energy. Sensors process their
observations and transmit their symbols to the FC over orthogonal fading
channels. The FC fuses the received symbols and makes a global binary decision.
We aim at developing adaptive channel-dependent transmit power control policies
such that J-divergence based detection metric is maximized at the FC, subject
to total transmit power constraint. Modeling the quantized fading channel, the
energy arrival, and the battery dynamics as time-homogeneous finite-state
Markov chains, and the network lifetime as a geometric random variable, we
formulate our power control optimization problem as a discounted
infinite-horizon constrained Markov decision process (MDP) problem, where
sensors' transmit powers are functions of the battery states, quantized channel
gains, and the arrived energies. We utilize stochastic dynamic programming and
Lagrangian approach to find the optimal and sub-optimal power control policies.
We demonstrate that our sub-optimal policy provides a close-to-optimal
performance with a reduced computational complexity and without imposing
signaling overhead on sensors.
|
[{'version': 'v1', 'created': 'Mon, 10 Oct 2022 18:44:17 GMT'}]
|
2022-10-12
|
[array(['Ardeshiri', 'Ghazaleh', ''], dtype=object)
array(['Vosoughi', 'Azadeh', ''], dtype=object)]
|
6,455 |
1411.3068
|
Indrakshi Raychowdhury
|
Indrakshi Raychowdhury and Ramesh Anishetty
|
Prepotential Formulation of Lattice Gauge Theory
|
7 pages, 6 figures, talk presented at the 32nd International
Symposium on Lattice Field Theory (Lattice 2014), 23-28 June 2014, New York,
USA
| null | null | null |
hep-lat
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Within the Hamiltonian formulation of Lattice gauge theories, prepotentials,
belonging to the fundamental representation of the gauge group and defined
locally at each site of the lattice, enables us to construct local loop
operators and loop states. We propose a set of diagrammatic rules for the
action of local gauge invariant operators on arbitrary loop states. Moreover We
propose a new set of fusion variables within the prepotential aproach suitable
for approaching the weak coupling limit.
|
[{'version': 'v1', 'created': 'Wed, 12 Nov 2014 04:54:28 GMT'}]
|
2014-11-13
|
[array(['Raychowdhury', 'Indrakshi', ''], dtype=object)
array(['Anishetty', 'Ramesh', ''], dtype=object)]
|
6,456 |
1503.06655
|
Giacomo Gigante
|
Luca Brandolini, Leonardo Colzani, Giacomo Gigante, Giancarlo
Travaglini
|
Low-discrepancy sequences for piecewise smooth functions on the
two-dimensional torus
|
14 pages, 2 figures
| null | null | null |
math.NT math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We produce explicit low-discrepancy infinite sequences which can be used to
approximate the integral of a smooth periodic function restricted to a convex
domain with positive curvature in R^2. The proof depends on simultaneous
diophantine approximation and a general version of the Erdos-Turan inequality.
|
[{'version': 'v1', 'created': 'Mon, 23 Mar 2015 14:33:24 GMT'}]
|
2015-03-24
|
[array(['Brandolini', 'Luca', ''], dtype=object)
array(['Colzani', 'Leonardo', ''], dtype=object)
array(['Gigante', 'Giacomo', ''], dtype=object)
array(['Travaglini', 'Giancarlo', ''], dtype=object)]
|
6,457 |
2301.03292
|
Vilmos Kocsis
|
Vilmos Kocsis, Yusuke Tokunaga, Toomas R\~o\~om, Urmas Nagel, Jun
Fujioka, Yasujiro Taguchi, Yoshinori Tokura and S\'andor Bord\'acs
|
Spin-lattice and magnetoelectric couplings enhanced by orbital degrees
of freedom in polar magnets
|
Supplementary included, 7 + 8 pages, 4 + 9 figures, Accepted version
| null |
10.1103/PhysRevLett.130.036801
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Orbital degrees of freedom mediating an interaction between spin and lattice
were predicted to raise strong magnetoelectric effect, i.e. realize an
efficient coupling between magnetic and ferroelectric orders. However, the
effect of orbital fluctuations have been considered only in a few
magnetoelectric materials, as orbital degeneracy driven Jahn-Teller effect
rarely couples to polarization. Here, we explore the spin-lattice coupling in
multiferroic Swedenborgites with mixed valence and Jahn-Teller active
transition metal ions on a stacked triangular/Kagome lattice using infrared and
dielectric spectroscopy. On one hand, in CaBa$M_4$O$_7$ ($M$ = Co, Fe), we
observe strong magnetic order induced shift in the phonon frequencies and a
corresponding large change in the dielectric response. Remarkably, as an
unusual manifestation of the spin-phonon coupling, the spin-fluctuations reduce
the phonon life-time by an order of magnitude at the magnetic phase
transitions. On the other hand, lattice vibrations, dielectric response, and
electric polarization show no variation at the N\'eel temperature of
CaBaFe$_2$Co$_2$O$_7$, which is built up by orbital singlet ions. Our results
provide a showcase for orbital degrees of freedom enhanced magnetoelectric
coupling via the example of Swedenborgites.
|
[{'version': 'v1', 'created': 'Mon, 9 Jan 2023 12:15:19 GMT'}]
|
2023-02-01
|
[array(['Kocsis', 'Vilmos', ''], dtype=object)
array(['Tokunaga', 'Yusuke', ''], dtype=object)
array(['Rõõm', 'Toomas', ''], dtype=object)
array(['Nagel', 'Urmas', ''], dtype=object)
array(['Fujioka', 'Jun', ''], dtype=object)
array(['Taguchi', 'Yasujiro', ''], dtype=object)
array(['Tokura', 'Yoshinori', ''], dtype=object)
array(['Bordács', 'Sándor', ''], dtype=object)]
|
6,458 |
1211.2926
|
M. Oguzhan Kulekci
|
M. Oguzhan Kulekci
|
Enumeration of sequences with large alphabets
| null | null | null | null |
cs.DS cs.DM cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This study focuses on efficient schemes for enumerative coding of
$\sigma$--ary sequences by mainly borrowing ideas from \"Oktem & Astola's
\cite{Oktem99} hierarchical enumerative coding and Schalkwijk's
\cite{Schalkwijk72} asymptotically optimal combinatorial code on binary
sequences. By observing that the number of distinct $\sigma$--dimensional
vectors having an inner sum of $n$, where the values in each dimension are in
range $[0...n]$ is $K(\sigma,n) = \sum_{i=0}^{\sigma-1} {{n-1} \choose
{\sigma-1-i}} {{\sigma} \choose {i}}$, we propose representing $C$ vector via
enumeration, and present necessary algorithms to perform this task. We prove
$\log K(\sigma,n)$ requires approximately $ (\sigma -1) \log (\sigma-1) $ less
bits than the naive $(\sigma-1)\lceil \log (n+1) \rceil$ representation for
relatively large $n$, and examine the results for varying alphabet sizes
experimentally. We extend the basic scheme for the enumerative coding of
$\sigma$--ary sequences by introducing a new method for large alphabets. We
experimentally show that the newly introduced technique is superior to the
basic scheme by providing experiments on DNA sequences.
|
[{'version': 'v1', 'created': 'Tue, 13 Nov 2012 09:30:08 GMT'}]
|
2012-11-14
|
[array(['Kulekci', 'M. Oguzhan', ''], dtype=object)]
|
6,459 |
2304.13494
|
Dipankar Das
|
Rafael Boto, Dipankar Das, Luis Lourenco, Jorge C. Romao, Joao P.
Silva
|
Fingerprinting the Type-Z three Higgs doublet models
|
15 pages, 4 captioned figures
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
There has been great interest in a model with three Higgs doublets in which
fermions with a particular charge couple to a single and distinct Higgs field.
We study the phenomenological differences between the two common incarnations
of this so-called Type-Z 3HDM. We point out that the differences between the
two models arise from the scalar potential only. Thus we focus on observables
that involve the scalar self-couplings. We find it difficult to uncover
features that can uniquely set apart the $Z_3$ variant of the model. However,
by studying the dependence of the trilinear Higgs couplings on the nonstandard
masses, we have been able to isolate some of the exclusive indicators for the
$Z_2\times Z_2$ version of the Type-Z 3HDM. This highlights the importance of
precision measurements of the trilinear Higgs couplings.
|
[{'version': 'v1', 'created': 'Wed, 26 Apr 2023 12:39:35 GMT'}]
|
2023-04-27
|
[array(['Boto', 'Rafael', ''], dtype=object)
array(['Das', 'Dipankar', ''], dtype=object)
array(['Lourenco', 'Luis', ''], dtype=object)
array(['Romao', 'Jorge C.', ''], dtype=object)
array(['Silva', 'Joao P.', ''], dtype=object)]
|
6,460 |
astro-ph/9710305
|
Daniel Proga
|
Daniel Proga (1), James M. Stone (2) and Janet E. Drew (1) ((1)
Imperial College of Science, Technology and Medicine, London, U.K., (2)
University of Maryland, College Park, Maryland, USA)
|
Radiation driven winds from luminous accretion disks
|
26 pages, LaTeX including two tables, requires mn.sty, 24 Postscript
figures including 8 colour ones, to appear in MNRAS
| null |
10.1046/j.1365-8711.1998.01337.x
| null |
astro-ph
| null |
We study the 2-D, time-dependent hydrodynamics of radiation-driven winds from
accretion disks in which the radiation force is mediated by spectral lines. If
the dominant contribution to the total radiation field comes from the disk,
then we find the outflow is intrinsically unsteady and characterised by large
amplitude velocity and density changes. Both infall and outflow can occur in
different regions of the wind at the same time. On the other hand, if the total
luminosity of the system is dominated by the central star, then the outflow is
steady. In either case, we find the 2-D structure of the wind consists of a
dense, slow outflow, typically confined to angles within about 45$^o$ of the
equatorial plane, that is bounded on the polar side by a high -velocity, lower
density stream. The flow geometry is controlled largely by the geometry of the
radiation field. Global properties e.g., the total mass loss rate and terminal
velocity depend more on the system luminosity and are insensitive to geometry.
Matter is fed into the fast wind from within a few stellar radii of the central
star. Our solutions agree qualitatively with the kinematics of outflows in CV
systems inferred from spectroscopic observations. We predict that low
luminosity systems may display unsteady behavior in wind-formed spectral lines.
Our study also has application to winds from active galactic nuclei and from
high mass YSOs.
|
[{'version': 'v1', 'created': 'Mon, 27 Oct 1997 16:57:55 GMT'}]
|
2015-06-24
|
[array(['Proga', 'Daniel', ''], dtype=object)
array(['Stone', 'James M.', ''], dtype=object)
array(['Drew', 'Janet E.', ''], dtype=object)]
|
6,461 |
2004.03679
|
Franziska Zeuner
|
Franziska Zeuner, Rafael Manso Sainz, Alex Feller, Michiel van Noort,
Sami K. Solanki, Francisco A. Iglesias, Kevin Reardon, and Valent\'in
Mart\'inez Pillet
|
Solar disk center shows scattering polarization in the Sr I 4607 {\AA}
line
|
15 pages , 6 figures, revised
|
The Astrophysical Journal Letters 893:L44 (2020)
|
10.3847/2041-8213/ab86b8
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Magnetic fields in turbulent, convective high-$\beta$ plasma naturally
develop highly tangled and complex topologies---the solar photosphere being the
paradigmatic example. These fields are mostly undetectable by standard
diagnostic techniques with finite spatio-temporal resolution due to
cancellations of Zeeman polarization signals. Observations of resonance
scattering polarization have been considered to overcome these problems. But up
to now, observations of scattering polarization lack the necessary combination
of high sensitivity and high spatial resolution in order to directly infer the
turbulent magnetic structure at the resolution limit of solar telescopes. Here,
we report the detection of clear spatial structuring of scattering polarization
in a magnetically quiet solar region at disk center in the Sr~{\sc i}
4607~\AA~spectral line on granular scales, confirming theoretical expectations.
We find that the linear polarization presents a strong spatial correlation with
the local quadrupole of the radiation field. The result indicates that
polarization survives the dynamic and turbulent magnetic environment of the
middle photosphere and is thereby usable for spatially resolved Hanle
observations. This is an important step toward the long-sought goal of directly
observing turbulent solar magnetic fields at the resolution limit and
investigating their spatial structure.
|
[{'version': 'v1', 'created': 'Tue, 7 Apr 2020 20:03:30 GMT'}
{'version': 'v2', 'created': 'Thu, 23 Apr 2020 21:52:35 GMT'}]
|
2020-04-27
|
[array(['Zeuner', 'Franziska', ''], dtype=object)
array(['Sainz', 'Rafael Manso', ''], dtype=object)
array(['Feller', 'Alex', ''], dtype=object)
array(['van Noort', 'Michiel', ''], dtype=object)
array(['Solanki', 'Sami K.', ''], dtype=object)
array(['Iglesias', 'Francisco A.', ''], dtype=object)
array(['Reardon', 'Kevin', ''], dtype=object)
array(['Pillet', 'Valentín Martínez', ''], dtype=object)]
|
6,462 |
2203.00518
|
Ga\"elle Chagny
|
Ga\"elle Chagny (1), Anouar Meynaoui (1), Angelina Roche (2) ((1)
LMRS, Universit\'e de Rouen Normandie, (2) CEREMADE, Universit\'e Paris
Dauphine)
|
Adaptive nonparametric estimation in the functional linear model with
functional output
| null | null | null | null |
math.ST stat.TH
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
In this paper, we consider a functional linear regression model, where both
the covariate and the response variable are functional random variables. We
address the problem of optimal nonparametric estimation of the conditional
expectation operator in this model. A collection of projection estimators over
finite dimensional subspaces is first introduce. We provide a non-asymptotic
bias-variance decomposition for the Mean Square Prediction error in the case
where these subspaces are generated by the (empirical) PCA functional basis.
The automatic trade-off is realized thanks to a model selection device which
selects the best projection dimensions: the penalized contrast estimator
satisfies an oracle-type inequality and is thus optimal in an adaptive point of
view. These upper-bounds allow us to derive convergence rates over ellipsoidal
smoothness spaces. The rates are shown to be optimal in the minimax sense: they
match with a lower bound of the minimax risk, which is also proved. Finally, we
conduct a numerical study, over simulated data and over two real-data sets.
|
[{'version': 'v1', 'created': 'Tue, 1 Mar 2022 15:02:30 GMT'}]
|
2022-03-02
|
[array(['Chagny', 'Gaëlle', ''], dtype=object)
array(['Meynaoui', 'Anouar', ''], dtype=object)
array(['Roche', 'Angelina', ''], dtype=object)]
|
6,463 |
2011.03766
|
Patrick Ledingham
|
D. Main, T. M. Hird, S. Gao, E. Oguz, D. J. Saunders, I. A. Walmsley,
P. M. Ledingham
|
Preparing Narrow Velocity Distributions for Quantum Memories in
Room-Temperature Alkali Vapours
| null |
Phys. Rev. A 103, 043105 (2021)
|
10.1103/PhysRevA.103.043105
| null |
quant-ph physics.atom-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Quantum memories are a crucial technology for enabling large-scale quantum
networks through synchronisation of probabilistic operations. Such networks
impose strict requirements on quantum memory, such as storage time, retrieval
efficiency, bandwidth, and scalability. On- and off-resonant ladder protocols
on warm atomic vapour platforms are promising candidates, combining efficient
high-bandwidth operation with low-noise on-demand retrieval. However, their
storage time is severely limited by motion-induced dephasing caused by the
broad velocity distribution of atoms comprising the vapour. In this paper, we
demonstrate velocity selective optical pumping to overcome this decoherence
mechanism. This will increase the achievable memory storage time of vapour
memories. This technique can also be used for preparing arbitrarily shaped
absorption profiles, for instance, preparing an atomic frequency comb
absorption feature.
|
[{'version': 'v1', 'created': 'Sat, 7 Nov 2020 12:46:25 GMT'}]
|
2021-04-21
|
[array(['Main', 'D.', ''], dtype=object)
array(['Hird', 'T. M.', ''], dtype=object)
array(['Gao', 'S.', ''], dtype=object)
array(['Oguz', 'E.', ''], dtype=object)
array(['Saunders', 'D. J.', ''], dtype=object)
array(['Walmsley', 'I. A.', ''], dtype=object)
array(['Ledingham', 'P. M.', ''], dtype=object)]
|
6,464 |
1610.00445
|
Nils Andersson
|
N. Andersson, G.L. Comer and I.Hawke
|
A variational approach to resistive relativistic plasmas
|
27 pages, 1 figure
| null |
10.1088/1361-6382/aa6b37
| null |
gr-qc astro-ph.HE hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We develop an action principle to construct the field equations for a
multi-fluid system containing charge-neutral fluids, plasmas, and dissipation
(via resistive interactions), by combining the standard, Maxwell action and
minimal coupling of the electromagnetic field with a recently developed action
for relativistic dissipative fluids. We use a pull-back formalism from
spacetime to abstract matter spaces to build unconstrained variations for both
the charge-neutral fluids and currents making up the plasmas. Using basic
linear algebra techniques, we show that a general "relabeling" invariance
exists for the abstract matter spaces. With the field equations in place, a
phenomenological model for the resistivity is developed, using as constraints
charge conservation and the Second Law of Thermodynamics. A minimal model for a
system of electrons, protons, and heat is developed using the Onsager procedure
for incorporating dissipation.
|
[{'version': 'v1', 'created': 'Mon, 3 Oct 2016 08:49:15 GMT'}]
|
2017-05-31
|
[array(['Andersson', 'N.', ''], dtype=object)
array(['Comer', 'G. L.', ''], dtype=object)
array(['Hawke', 'I.', ''], dtype=object)]
|
6,465 |
1105.1655
|
Alexander Rudenko
|
A.N. Rudenko, F.J. Keil, M.I. Katsnelson, and A.I. Lichtenstein
|
Interfacial interactions between local defects in amorphous SiO$_2$ and
supported graphene
|
10 pages, 4 figures
|
Phys. Rev. B 84, 085438 (2011)
|
10.1103/PhysRevB.84.085438
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a density functional study of graphene adhesion on a realistic
SiO$_2$ surface taking into account van der Waals (vdW) interactions. The
SiO$_2$ substrate is modeled at the local scale by using two main types of
surface defects, typical for amorphous silica: the oxygen dangling bond and
three-coordinated silicon. The results show that the nature of adhesion between
graphene and its substrate is qualitatively dependent on the surface defect
type. In particular, the interaction between graphene and silicon-terminated
SiO$_2$ originates exclusively from the vdW interaction, whereas the
oxygen-terminated surface provides additional ionic contribution to the binding
arising from interfacial charge transfer ($p$-type doping of graphene). Strong
doping contrast for the different surface terminations provides a mechanism for
the charge inhomogeneity of graphene on amorphous SiO$_2$ observed in
experiments. We found that independent of the considered surface morphologies,
the typical electronic structure of graphene in the vicinity of the Dirac point
remains unaltered in contact with the SiO$_2$ substrate, which points to the
absence of the covalent interactions between graphene and amorphous silica. The
case of hydrogen-passivated SiO$_2$ surfaces is also examined. In this
situation, the binding with graphene is practically independent of the type of
surface defects and arises, as expected, from the vdW interactions. Finally,
the interface distances obtained are shown to be in good agreement with recent
experimental studies.
|
[{'version': 'v1', 'created': 'Mon, 9 May 2011 12:33:44 GMT'}
{'version': 'v2', 'created': 'Mon, 29 Aug 2011 16:57:43 GMT'}]
|
2011-08-30
|
[array(['Rudenko', 'A. N.', ''], dtype=object)
array(['Keil', 'F. J.', ''], dtype=object)
array(['Katsnelson', 'M. I.', ''], dtype=object)
array(['Lichtenstein', 'A. I.', ''], dtype=object)]
|
6,466 |
1603.02347
|
Zherong Pan
|
Zherong Pan, Dinesh Manocha
|
Motion Planning for Fluid Manipulation using Simplified Dynamics
| null | null | null | null |
cs.RO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present an optimization-based motion planning algorithm to compute a
smooth, collision-free trajectory for a manipulator used to transfer a liquid
from a source to a target container. We take into account fluid dynamics
constraints as part of trajectory computation. In order to avoid the high
complexity of exact fluid simulation, we introduce a simplified dynamics model
based on physically inspired approximations and system identification. Our
optimization approach can incorporate various other constraints such as
collision avoidance with the obstacles, kinematic and dynamics constraints of
the manipulator, and fluid dynamics characteristics. We demonstrate the
performance of our planner on different benchmarks corresponding to various
obstacles and container shapes. Furthermore, we also evaluate its accuracy by
validating the motion plan using an accurate but computationally costly
Navier-Stokes fluid simulation.
|
[{'version': 'v1', 'created': 'Tue, 8 Mar 2016 00:43:50 GMT'}]
|
2016-03-09
|
[array(['Pan', 'Zherong', ''], dtype=object)
array(['Manocha', 'Dinesh', ''], dtype=object)]
|
6,467 |
2108.09625
|
Avinash Chaurasiya
|
Avinash Chaurasiya, Manish Anand, and Rajdeep Singh Rawat
|
Angle Selective Piezoelectric Strain Controlled Magnetization Switching
in Artificial Spin Ice Based Multiferroic System
|
23 pages, 9 figures
| null | null | null |
cond-mat.mes-hall
|
http://creativecommons.org/licenses/by/4.0/
|
The prospect of all electrically controlled writing of ferromagnetic bits is
highly desirable for developing scalable and energy-efficient spintronics
devices. In the present work, we perform micromagnetic simulations to
investigate the electric field-induced strain mediated magnetization switching
in artificial spin ice (ASI) based multiferroic system, which is proposed to
have a significant decrease in Joule heating losses compared to electric
current based methods. As the piezo electric strain-based system cannot switch
the magnetization by $180^\circ$ in ferromagnets, we propose an ASI
multiferroic system consisting of the peanut-shaped nanomagnets on
ferroelectric substrate with the angle between the easy axis and hard axis of
magnetization less than $90^\circ$. Here the piezoelectric strain-controlled
magnetization switching has been studied by applying the electric field pulse
at different angles with respect to the axes of the system. Remarkably,
magnetization switches by $180^\circ$ only if the external electric field pulse
is applied at some specific angles, close to the anisotropy axis of the system
( $\sim 30^\circ - 60^\circ$). Our detailed analysis of the demagnetization
energy variation reveals that the energy barrier becomes antisymmetric in such
cases, facilitating the complete magnetization reversal. Moreover, we have also
proposed a possible magnetization reversal mechanism with two sequential
electric field pulses of relatively smaller magnitude. We believe that the
present work could pave the way for future ASI-based multiferroic system for
scalable magnetic field-free low power spintronics devices.
|
[{'version': 'v1', 'created': 'Sun, 22 Aug 2021 03:48:04 GMT'}]
|
2021-08-24
|
[array(['Chaurasiya', 'Avinash', ''], dtype=object)
array(['Anand', 'Manish', ''], dtype=object)
array(['Rawat', 'Rajdeep Singh', ''], dtype=object)]
|
6,468 |
1708.06080
|
Matija Vidmar
|
Florin Avram, Matija Vidmar
|
First passage problems for upwards skip-free random walks via the
$\Phi,W,Z$ paradigm
|
27 pages
| null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We develop the theory of the $W$ and $Z$ scale functions for right-continuous
(upwards skip-free) discrete-time discrete-space random walks, along the lines
of the analogue theory for spectrally negative L\'evy processes. Notably, we
introduce for the first time in this context the one and two-parameter scale
functions $Z$, which appear for example in the joint problem of deficit at ruin
and time of ruin, and in problems concerning the walk reflected at an upper
barrier. Comparisons are made between the various theories of scale functions
as one makes time and/or space continuous. The theory is shown to be fruitful
by providing a convenient unified framework for studying dividends-capital
injection problems under various objectives, for the so-called compound
binomial risk model of actuarial science.
|
[{'version': 'v1', 'created': 'Mon, 21 Aug 2017 05:37:48 GMT'}
{'version': 'v2', 'created': 'Sat, 14 Apr 2018 17:44:43 GMT'}]
|
2018-04-17
|
[array(['Avram', 'Florin', ''], dtype=object)
array(['Vidmar', 'Matija', ''], dtype=object)]
|
6,469 |
1912.01010
|
Oliver Henry Edward Philcox
|
Oliver H. E. Philcox, Daniel J. Eisenstein
|
Computing the Small-Scale Galaxy Power Spectrum and Bispectrum in
Configuration-Space
|
29 pages, 14 figures, accepted by MNRAS. Code is available at
https://github.com/oliverphilcox/HIPSTER with documentation at
https://HIPSTER.readthedocs.io
| null |
10.1093/mnras/stz3335
| null |
astro-ph.CO astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a new class of estimators for computing small-scale power spectra
and bispectra in configuration-space via weighted pair- and triple-counts, with
no explicit use of Fourier transforms. Particle counts are truncated at
$R_0\sim 100h^{-1}\,\mathrm{Mpc}$ via a continuous window function, which has
negligible effect on the measured power spectrum multipoles at small scales.
This gives a power spectrum algorithm with complexity $\mathcal{O}(NnR_0^3)$
(or $\mathcal{O}(Nn^2R_0^6)$ for the bispectrum), measuring $N$ galaxies with
number density $n$. Our estimators are corrected for the survey geometry and
have neither self-count contributions nor discretization artifacts, making them
ideal for high-$k$ analysis. Unlike conventional Fourier transform based
approaches, our algorithm becomes more efficient on small scales (since a
smaller $R_0$ may be used), thus we may efficiently estimate spectra across
$k$-space by coupling this method with standard techniques. We demonstrate the
utility of the publicly available power spectrum algorithm by applying it to
BOSS DR12 simulations to compute the high-$k$ power spectrum and its
covariance. In addition, we derive a theoretical rescaled-Gaussian covariance
matrix, which incorporates the survey geometry and is found to be in good
agreement with that from mocks. Computing configuration- and Fourier-space
statistics in the same manner allows us to consider joint analyses, which can
place stronger bounds on cosmological parameters; to this end we also discuss
the cross-covariance between the two-point correlation function and the
small-scale power spectrum.
|
[{'version': 'v1', 'created': 'Mon, 2 Dec 2019 19:00:02 GMT'}
{'version': 'v2', 'created': 'Tue, 24 Dec 2019 18:38:30 GMT'}
{'version': 'v3', 'created': 'Fri, 27 Dec 2019 16:29:35 GMT'}]
|
2019-12-30
|
[array(['Philcox', 'Oliver H. E.', ''], dtype=object)
array(['Eisenstein', 'Daniel J.', ''], dtype=object)]
|
6,470 |
1903.12050
|
Miklos Z. Racz
|
Mikl\'os Z. R\'acz, Benjamin Schiffer
|
Finding a planted clique by adaptive probing
|
14 pages, 1 figure
| null | null | null |
math.CO cs.DM cs.DS math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a variant of the planted clique problem where we are allowed
unbounded computational time but can only investigate a small part of the graph
by adaptive edge queries. We determine (up to logarithmic factors) the number
of queries necessary both for detecting the presence of a planted clique and
for finding the planted clique.
Specifically, let $G \sim G(n,1/2,k)$ be a random graph on $n$ vertices with
a planted clique of size $k$. We show that no algorithm that makes at most $q =
o(n^2 / k^2 + n)$ adaptive queries to the adjacency matrix of $G$ is likely to
find the planted clique. On the other hand, when $k \geq (2+\epsilon) \log_2 n$
there exists a simple algorithm (with unbounded computational power) that finds
the planted clique with high probability by making $q = O( (n^2 / k^2) \log^2 n
+ n \log n)$ adaptive queries. For detection, the additive $n$ term is not
necessary: the number of queries needed to detect the presence of a planted
clique is $n^2 / k^2$ (up to logarithmic factors).
|
[{'version': 'v1', 'created': 'Thu, 28 Mar 2019 15:28:43 GMT'}
{'version': 'v2', 'created': 'Fri, 24 Jul 2020 03:33:28 GMT'}]
|
2020-07-27
|
[array(['Rácz', 'Miklós Z.', ''], dtype=object)
array(['Schiffer', 'Benjamin', ''], dtype=object)]
|
6,471 |
2205.09877
|
Agust\'in Eloy Martinez Su\~n\'e
|
Agust\'in E. Martinez Su\~n\'e and Carlos G. Lopez Pombo
|
Probabilistic Quality of Service aware Service Selection
|
18 pages, 5 figures
| null | null | null |
cs.SE cs.LO
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
In software-as-a-service paradigms software systems are no longer monolithic
pieces of code executing within the boundaries of an organisation, on the
contrary, they are conceived as a dynamically changing collection of services,
collectively executing, in pursuit of a common business goal. An essential
aspect of service selection is determining whether the Quality of Service (QoS)
profile of a service satisfies the QoS requirements of a client.
In realistic execution environments, such QoS values might be influenced by
external, non-controllable events, making it impossible for the service
provider to guarantee that the values characterised by a QoS profile will be
met, naturally leading to the need of a probabilistic interpretation of QoS
profile.
In this work we propose: 1) a model for describing probabilistic QoS profiles
based on multivariate continuous probability distributions, 2) a language for
describing probabilistic QoS requirements, and 3) an automatic procedure for
assessing whether a probabilistic QoS profile satisfies a probabilistic QoS
requirement.
|
[{'version': 'v1', 'created': 'Thu, 19 May 2022 21:53:37 GMT'}]
|
2022-05-23
|
[array(['Suñé', 'Agustín E. Martinez', ''], dtype=object)
array(['Pombo', 'Carlos G. Lopez', ''], dtype=object)]
|
6,472 |
1412.1411
|
Ting-Li Chen
|
Ting-Li Chen, Hironori Fujisawa, Su-Yun Huang, Chii-Ruey Hwang
|
On the Weak Convergence and Central Limit Theorem of Blurring and
Nonblurring Processes with Application to Robust Location Estimation
| null | null | null | null |
math.ST math.PR stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This article studies the weak convergence and associated Central Limit
Theorem for blurring and nonblurring processes. Then, they are applied to the
estimation of location parameter. Simulation studies show that the location
estimation based on the convergence point of blurring process is more robust
and often more efficient than that of nonblurring process.
|
[{'version': 'v1', 'created': 'Wed, 3 Dec 2014 17:42:43 GMT'}
{'version': 'v2', 'created': 'Wed, 7 Jan 2015 15:40:52 GMT'}
{'version': 'v3', 'created': 'Tue, 27 Jan 2015 09:01:40 GMT'}]
|
2015-01-28
|
[array(['Chen', 'Ting-Li', ''], dtype=object)
array(['Fujisawa', 'Hironori', ''], dtype=object)
array(['Huang', 'Su-Yun', ''], dtype=object)
array(['Hwang', 'Chii-Ruey', ''], dtype=object)]
|
6,473 |
2005.05081
|
Devashish Pandey
|
Devashish Pandey, Xavier Oriols and Guillermo Albareda
|
Including arbitrary geometric correlations into one-dimensional
time-dependent Schr\"{o}dinger equations
| null |
Materials, 2020
|
10.3390/ma13133033
|
13(13), 3033
|
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The so-called Born-Huang ansatz is a fundamental tool in the context of
ab-initio molecular dynamics, viz., it allows to effectively separate fast and
slow degrees of freedom and thus treating electrons and nuclei at different
mathematical footings. Here we consider the use of a Born-Huang-like expansion
of the three-dimensional time-dependent Schr\"odinger equation to separate
transport and confinement degrees of freedom in electron transport problems
that involve geometrical constrictions. The resulting scheme consists of an
eigenstate problem for the confinement degrees of freedom (in the transverse
direction) whose solution constitutes the input for the propagation of a set of
coupled one-dimensional equations of motion for the transport degree of freedom
(in the longitudinal direction). This technique achieves quantitative accuracy
using an order less computational resources than the full dimensional
simulation for a prototypical two-dimensional constriction.
|
[{'version': 'v1', 'created': 'Mon, 11 May 2020 13:10:16 GMT'}]
|
2023-01-24
|
[array(['Pandey', 'Devashish', ''], dtype=object)
array(['Oriols', 'Xavier', ''], dtype=object)
array(['Albareda', 'Guillermo', ''], dtype=object)]
|
6,474 |
1312.4799
|
Kayhan Gultekin
|
Kayhan G\"ultekin, Karl Gebhardt, John Kormendy, Tod R. Lauer, Ralf
Bender, Scott Tremaine, and Douglas O. Richstone
|
The Black Hole Mass and the Stellar Ring in NGC 3706
|
Accepted by ApJ, 14 pages, 9 figures, 1 Table
| null |
10.1088/0004-637X/781/2/112
| null |
astro-ph.GA astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We determine the mass of the nuclear black hole ($M$) in NGC 3706, an early
type galaxy with a central surface brightness minimum arising from an apparent
stellar ring, which is misaligned with respect to the galaxy's major axis at
larger radii. We fit new HST/STIS and archival data with axisymmetric orbit
models to determine $M$, mass-to-light ratio ($\Upsilon_V$), and dark matter
halo profile. The best-fit model parameters with 1$\sigma$ uncertainties are $M
= (6.0^{+0.7}_{-0.9}) \times 10^8\ M_{\scriptscriptstyle \odot}$ and
$\Upsilon_V = 6.0 \pm 0.2\ M_{\scriptscriptstyle \odot}\ L_{{\scriptscriptstyle
\odot},V}^{-1}$ at an assumed distance of 46 Mpc. The models are inconsistent
with no black hole at a significance of $\Delta\chi^2 = 15.4$ and require a
dark matter halo to adequately fit the kinematic data, but the fits are
consistent with a large range of plausible dark matter halo parameters. The
ring is inconsistent with a population of co-rotating stars on circular orbits,
which would produce a narrow line-of-sight velocity distribution (LOSVD).
Instead, the ring's LOSVD has a small value of $|V|/\sigma$, the ratio of mean
velocity to velocity dispersion. Based on the observed low $|V|/\sigma$, our
orbit modeling, and a kinematic decomposition of the ring from the bulge, we
conclude that the stellar ring contains stars that orbit in both directions. We
consider potential origins for this unique feature, including multiple tidal
disruptions of stellar clusters, a change in the gravitational potential from
triaxial to axisymmetric, resonant capture and inclining of orbits by a binary
black hole, and multiple mergers leading to gas being funneled to the center of
the galaxy.
|
[{'version': 'v1', 'created': 'Tue, 17 Dec 2013 14:27:51 GMT'}]
|
2015-06-18
|
[array(['Gültekin', 'Kayhan', ''], dtype=object)
array(['Gebhardt', 'Karl', ''], dtype=object)
array(['Kormendy', 'John', ''], dtype=object)
array(['Lauer', 'Tod R.', ''], dtype=object)
array(['Bender', 'Ralf', ''], dtype=object)
array(['Tremaine', 'Scott', ''], dtype=object)
array(['Richstone', 'Douglas O.', ''], dtype=object)]
|
6,475 |
2005.00584
|
Loren Alegria
|
Loren D. Alegria, Charlotte G. B{\o}ttcher, Andrew K. Saydjari, Andrew
T. Pierce, Seung H. Lee, Shannon P. Harvey, Uri Vool, and Amir Yacoby
|
High-Energy Quasiparticle Injection into Mesoscopic Superconductors
|
Nat. Nanotechnol. (2021)
| null |
10.1038/s41565-020-00834-8
| null |
cond-mat.supr-con cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
At nonzero temperatures, superconductors contain excitations known as
Bogoliubov quasiparticles. The mesoscopic dynamics of quasiparticles inform the
design of quantum information processors, among other devices. Knowledge of
these dynamics stems from experiments in which quasiparticles are injected in a
controlled fashion, typically at energies comparable to the pairing energy .
Here we perform tunnel spectroscopy of a mesoscopic superconductor under high
electric field. We observe quasiparticle injection due to field-emitted
electrons with 10^6 times the pairing energy, an unexplored regime of
quasiparticle dynamics. Upon application of a gate voltage, the quasiparticle
injection decreases the critical current and, at sufficiently high electric
field, the field-emission current (< 0.1 nA) switches the mesoscopic
superconductor into the normal state, consistent with earlier results. We
expect that high-energy injection will be useful for developing
quasiparticle-tolerant quantum information processors, will allow rapid control
of resonator quality factors, and will enable the design of
electric-field-controlled superconducting devices with new functionality.
|
[{'version': 'v1', 'created': 'Fri, 1 May 2020 20:01:44 GMT'}
{'version': 'v2', 'created': 'Mon, 18 Jan 2021 17:57:40 GMT'}]
|
2021-01-19
|
[array(['Alegria', 'Loren D.', ''], dtype=object)
array(['Bøttcher', 'Charlotte G.', ''], dtype=object)
array(['Saydjari', 'Andrew K.', ''], dtype=object)
array(['Pierce', 'Andrew T.', ''], dtype=object)
array(['Lee', 'Seung H.', ''], dtype=object)
array(['Harvey', 'Shannon P.', ''], dtype=object)
array(['Vool', 'Uri', ''], dtype=object)
array(['Yacoby', 'Amir', ''], dtype=object)]
|
6,476 |
quant-ph/0407187
|
Mme Marie-Christine Angonin
|
Philippe Tourrenc (ERGA/LERMA), Marie-Christine Angonin (ERGA/LERMA),
Peter Wolf (BIPM, BNM-SYRTE)
|
The "Forgotten" Process : the emission stimulated by matter waves
|
submitted in European Journal of Physics
| null | null | null |
quant-ph
| null |
In a famous paper where he introduces the A and B coefficients, Einstein
considered that atomic decays of excited atoms can be stimulated by light
waves. Here we consider that atomic decays can also be stimulated by atomic
waves. It is however necessary to change the Maxwell-Boltzmann statistics of
thermal equilibrium into Bose-Einstein statistics and to introduce a
coefficient C which complements the list of the coefficients introduced by
Einstein. Stimulated emission of light can be considered as the first step
towards the laser. Similarly, stimulated production of matter waves can be
considered as the basic phenomenon for an atom-laser. Most of the results that
we obtain here are not new. However, the method that we use remains very close
to elementary classical physics and emphasizes the symmetry between
electromagnetic and matter waves from various points of view.
|
[{'version': 'v1', 'created': 'Fri, 23 Jul 2004 13:39:05 GMT'}
{'version': 'v2', 'created': 'Wed, 17 Nov 2004 09:53:37 GMT'}]
|
2007-05-23
|
[array(['Tourrenc', 'Philippe', '', 'ERGA/LERMA'], dtype=object)
array(['Angonin', 'Marie-Christine', '', 'ERGA/LERMA'], dtype=object)
array(['Wolf', 'Peter', '', 'BIPM, BNM-SYRTE'], dtype=object)]
|
6,477 |
q-alg/9709026
|
Mukhin E.
|
E. Mukhin and A. Varchenko
|
The Quantized Knizhnik-Zamolodchikov Equation in Tensor Products of
Irreducible sl(2)-Modules
|
LaTex, 32 pages, a theorem added
| null | null | null |
q-alg math.QA
| null |
We consider the quantized Knizhnik-Zamolodchikov difference equation (qKZ)
with values in a tensor product of irreducible sl(2) modules, the equation
defined in terms of rational R-matrices. We solve the equation in terms of
multidimensional q-hypergeometric integrals. We identify the space of solutions
of the qKZ equation with the tensor product of the corresponding modules over
the quantum group $U_qsl(2)$. We compute the monodromy of the qKZ equation in
terms of the trigonometric R-matrices.
|
[{'version': 'v1', 'created': 'Tue, 16 Sep 1997 17:08:39 GMT'}
{'version': 'v2', 'created': 'Mon, 29 Sep 1997 18:23:49 GMT'}]
|
2008-02-03
|
[array(['Mukhin', 'E.', ''], dtype=object)
array(['Varchenko', 'A.', ''], dtype=object)]
|
6,478 |
1306.2186
|
Agnieszka \'Swierczewska-Gwiazda
|
Agnieszka \'Swierczewska-Gwiazda
|
Nonlinear parabolic problems in Musielak--Orlicz spaces
|
33 pages
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Our studies are directed to the existence of weak solutions to a parabolic
problem containing a multi-valued term. The problem is formulated in the
language of maximal monotone graphs. We assume that the growth and coercivity
conditions of a nonlinear term are prescribed by means of time and space
dependent $N$--function. This results in formulation of the problem in
generalized Musielak-Orlicz spaces. We are using density arguments, hence an
important step of the proof is a uniform boundedness of appropriate convolution
operators in Musielak-Orlicz spaces. For this purpose we shall need to assume a
kind of logarithmic H\"older regularity with respect to $t$ and $x$.
|
[{'version': 'v1', 'created': 'Mon, 10 Jun 2013 12:45:39 GMT'}]
|
2013-06-11
|
[array(['Świerczewska-Gwiazda', 'Agnieszka', ''], dtype=object)]
|
6,479 |
1303.4609
|
Christine Laurent-Thiebaut
|
Christine Laurent-Thi\'ebaut (IF)
|
$L^p$-theory for the tangential Cauchy-Riemann equation
| null | null | null | null |
math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We are interested in $L^p$-theory for the tangential Cauchy-Riemann operator
in locally embeddable, $s$-concave, generic CR manifolds. We study the
Dolbeault isomorphism and develop the Andreotti-Grauert theory in that setting.
Using Serre duality, we solve the tangential Cauchy-Riemann equation with exact
support and $L^p$-estimates.
|
[{'version': 'v1', 'created': 'Tue, 19 Mar 2013 14:18:50 GMT'}]
|
2013-03-20
|
[array(['Laurent-Thiébaut', 'Christine', '', 'IF'], dtype=object)]
|
6,480 |
1712.05799
|
Stylianos Moschoglou
|
Stylianos Moschoglou, Evangelos Ververas, Yannis Panagakis, Mihalis
Nicolaou, Stefanos Zafeiriou
|
Multi-Attribute Robust Component Analysis for Facial UV Maps
| null | null |
10.1109/JSTSP.2018.2877108
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently, due to the collection of large scale 3D face models, as well as the
advent of deep learning, a significant progress has been made in the field of
3D face alignment "in-the-wild". That is, many methods have been proposed that
establish sparse or dense 3D correspondences between a 2D facial image and a 3D
face model. The utilization of 3D face alignment introduces new challenges and
research directions, especially on the analysis of facial texture images. In
particular, texture does not suffer any more from warping effects (that
occurred when 2D face alignment methods were used). Nevertheless, since facial
images are commonly captured in arbitrary recording conditions, a considerable
amount of missing information and gross outliers is observed (e.g., due to
self-occlusion, or subjects wearing eye-glasses). Given that many annotated
databases have been developed for face analysis tasks, it is evident that
component analysis techniques need to be developed in order to alleviate issues
arising from the aforementioned challenges. In this paper, we propose a novel
component analysis technique that is suitable for facial UV maps containing a
considerable amount of missing information and outliers, while additionally,
incorporates knowledge from various attributes (such as age and identity). We
evaluate the proposed Multi-Attribute Robust Component Analysis (MA-RCA) on
problems such as UV completion and age progression, where the proposed method
outperforms compared techniques. Finally, we demonstrate that MA-RCA method is
powerful enough to provide weak annotations for training deep learning systems
for various applications, such as illumination transfer.
|
[{'version': 'v1', 'created': 'Fri, 15 Dec 2017 18:14:59 GMT'}]
|
2019-01-30
|
[array(['Moschoglou', 'Stylianos', ''], dtype=object)
array(['Ververas', 'Evangelos', ''], dtype=object)
array(['Panagakis', 'Yannis', ''], dtype=object)
array(['Nicolaou', 'Mihalis', ''], dtype=object)
array(['Zafeiriou', 'Stefanos', ''], dtype=object)]
|
6,481 |
1611.06513
|
Ludivine Oruba
|
Ludivine Oruba
|
On the role of thermal boundary conditions in dynamo scaling laws
|
14 pages, 3 figures
|
Journal Geophysical & Astrophysical Fluid Dynamics Volume 110,
2016 - Issue 6 pages 529-545
|
10.1080/03091929.2016.1217523
| null |
physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In dynamo power-based scaling laws, the power $P$ injected by buoyancy forces
is measured by a so-called flux-based Rayleigh number, denoted as ${\rm
Ra}_Q^*$ (see Christensen and Aubert, 2006). Whereas it is widely accepted that
this parameter is measured (as opposite to controlled) in dynamos driven by
differential heating, the literature is much less clear concerning its nature
in the case of imposed heat flux. We clarify this issue by highlighting that in
that case, the ${\rm Ra}_{Q}^*$ parameter becomes controlled only in the limit
of large Nusselt numbers (${\rm Nu} \gg 1$).
We then address the issue of the robustness of the original relation between
$P$ and ${\rm Ra}_Q^*$ with the geometry and the thermal boundary conditions.
We show that in the cartesian geometry, as in the spherical geometry with a
central mass distribution, this relation is purely linear, in both differential
and fixed-flux heating. However, we show that in the geometry commonly studied
by geophysicists (spherical with uniform mass distribution), its validity
places an upper-bound on the strength of the driving which can be envisaged in
a fixed Ekman number simulation. An increase of the Rayleigh number indeed
yields deviations (in terms of absolute correction) from the linear relation
between $P$ and ${\rm Ra}_Q^*$. We conclude that in such configurations, the
parameter range for which $P$ is controlled is limited.
|
[{'version': 'v1', 'created': 'Sun, 20 Nov 2016 13:08:42 GMT'}]
|
2016-11-22
|
[array(['Oruba', 'Ludivine', ''], dtype=object)]
|
6,482 |
2103.09817
|
Valery Milner
|
Alexander A. Milner, Uri Steinitz, Ilya Sh. Averbukh, and Valery
Milner
|
Observation of mechanical Faraday effect in gas media
| null |
Phys. Rev. Lett. 127, 073901 (2021)
|
10.1103/PhysRevLett.127.073901
| null |
physics.atom-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We report the experimental observation of the rotation of the polarization
plane of light propagating in a gas of fast-spinning molecules (molecular
super-rotors). In the observed effect, related to Fermi's prediction of
"polarization drag" by a rotating medium, the vector of linear polarization
tilts in the direction of molecular rotation due to the rotation-induced
difference in the refractive indices for the left and right circularly
polarized components. We use an optical centrifuge to bring the molecules in a
gas sample to ultrafast unidirectional rotation and measure the polarization
drag angles of the order of 0.2 milliradians in a number of gases under ambient
conditions. We demonstrate an all-optical control of the drag magnitude and
direction, and investigate the robustness of the mechanical Faraday effect with
respect to molecular collisions.
|
[{'version': 'v1', 'created': 'Tue, 16 Mar 2021 18:09:18 GMT'}]
|
2021-08-18
|
[array(['Milner', 'Alexander A.', ''], dtype=object)
array(['Steinitz', 'Uri', ''], dtype=object)
array(['Averbukh', 'Ilya Sh.', ''], dtype=object)
array(['Milner', 'Valery', ''], dtype=object)]
|
6,483 |
math-ph/0308026
|
Bindu Anubha Bambah
|
Bindu A. Bambah
|
Polynomial Algebras and their Applications
|
Invited talk at "The International conference on Supersymmetric
Quantum Mechanics, Valladolid Spain (July 15-20, 2003),. Work done with Dr.
V. SuniKumar IOP, Bhubaneshwar and Prof. R. Jagannathan, IMSC, Chennai. 12
pages LATEX with JHEP3.cls Macro included
| null | null | null |
math-ph hep-th math.MP math.QA quant-ph
| null |
A way to construct and classify the three dimensional polynomially deformed
algebras is given and the irreducible representations is presented. for the
quadratic algebras 4 different algebras are obtained and for cubic algebras 12
different classes are constructed. Applications to quantum mechanical systems
including supersymmetric quantum mechanics are discussed
|
[{'version': 'v1', 'created': 'Fri, 22 Aug 2003 11:10:14 GMT'}]
|
2007-05-23
|
[array(['Bambah', 'Bindu A.', ''], dtype=object)]
|
6,484 |
2206.08941
|
Madeline Marshall
|
Madeline A. Marshall, Katelyn Watts, Stephen Wilkins, Tiziana Di
Matteo, Jussi K. Kuusisto, William J. Roper, Aswin P. Vijayan, Yueying Ni, Yu
Feng, Rupert A.C. Croft
|
The BlueTides Mock Image Catalogue: Simulated observations of
high-redshift galaxies and predictions for JWST imaging surveys
|
Published in MNRAS. The BlueTides Mock Image Catalogue is publicly
available as a High Level Science Product (HLSP) via the Mikulski Archive for
Space Telescopes (MAST), at https://doi.org/10.17909/er09-4527. Example codes
for using the catalogue data are available at
https://github.com/madelinemarshall/BlueTidesMockImageCatalogue
| null |
10.1093/mnras/stac2111
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a mock image catalogue of ~100,000 MUV=-22.5 to -19.6 mag galaxies
at z=7-12 from the BlueTides cosmological simulation. We create mock images of
each galaxy with the James Webb (JWST), Hubble, Roman, and Euclid Space
Telescopes, as well as Subaru, and VISTA, with a range of near- and
mid-infrared filters. We perform photometry on the mock images to estimate the
success of these instruments for detecting high-z galaxies. We predict that
JWST will have unprecedented power in detecting high-z galaxies, with a 95%
completeness limit at least 2.5 magnitudes fainter than VISTA and Subaru, 1.1
magnitudes fainter than Hubble, and 0.9 magnitudes fainter than Roman, for the
same wavelength and exposure time. Focusing on JWST, we consider a range of
exposure times and filters, and find that the NIRCam F356W and F277W filters
will detect the faintest galaxies, with 95% completeness at m=27.4 mag in 10ks
exposures. We also predict the number of high-z galaxies that will be
discovered by upcoming JWST imaging surveys. We predict that the COSMOS-Web
survey will detect ~1000 MUV<-20.1 mag galaxies at 6.5<z<7.5, by virtue of its
large survey area. JADES-Medium will detect almost 100% of MUV<-20 mag galaxies
at z<8.5 due to its significant depth, however with its smaller survey area it
will detect only ~100 of these galaxies at 6.5<z<7.5. Cosmic variance results
in a large range in the number of predicted galaxies each survey will detect,
which is more evident in smaller surveys such as CEERS and the PEARLS NEP and
GOODS-S fields.
|
[{'version': 'v1', 'created': 'Fri, 17 Jun 2022 18:00:00 GMT'}
{'version': 'v2', 'created': 'Thu, 25 Aug 2022 17:46:35 GMT'}]
|
2022-08-26
|
[array(['Marshall', 'Madeline A.', ''], dtype=object)
array(['Watts', 'Katelyn', ''], dtype=object)
array(['Wilkins', 'Stephen', ''], dtype=object)
array(['Di Matteo', 'Tiziana', ''], dtype=object)
array(['Kuusisto', 'Jussi K.', ''], dtype=object)
array(['Roper', 'William J.', ''], dtype=object)
array(['Vijayan', 'Aswin P.', ''], dtype=object)
array(['Ni', 'Yueying', ''], dtype=object)
array(['Feng', 'Yu', ''], dtype=object)
array(['Croft', 'Rupert A. C.', ''], dtype=object)]
|
6,485 |
cond-mat/0004166
|
Mladen Latkovic
|
M. Latkovic, A. Bjelis and V. Dananic
|
Landau Model for Commensurate-Commensurate Phase Transitions in Uniaxial
Improper Ferroelectric Crystals
|
9 pages, 5 figures, revtex, to be published in Journal of Physics:
Cond. Matter as a Letter to the Editor
| null |
10.1088/0953-8984/12/19/101
| null |
cond-mat.mtrl-sci cond-mat.stat-mech
| null |
We propose the Landau model for lock-in phase transitions in uniaxially
modulated improper ferroelectric incommensurate-commensurate systems of class
I. It includes Umklapp terms of third and fourth order and secondary order
parameter representing the local polarization. The corresponding phase diagram
has the structure of harmless staircase, with the allowed wave numbers obeying
the Farey tree algorithm. Among the stable commensurate phases only those with
periods equal to odd number of lattice constants have finite macroscopic
polarizations. These results are in excellent agreement with experimental
findings in some A2BX4 compounds.
|
[{'version': 'v1', 'created': 'Tue, 11 Apr 2000 10:19:05 GMT'}]
|
2009-10-31
|
[array(['Latkovic', 'M.', ''], dtype=object)
array(['Bjelis', 'A.', ''], dtype=object)
array(['Dananic', 'V.', ''], dtype=object)]
|
6,486 |
1308.5561
|
No\`elia Viles Cuadros
|
Enrico Scalas and No\`elia Viles
|
A Functional Limit Theorem for stochastic integrals driven by a
time-changed symmetric \alpha-stable L\'evy process
|
20 pages. This paper is accepted to SPA
| null | null | null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Under proper scaling and distributional assumptions, we prove the convergence
in the Skorokhod space endowed with the M_1-topology of a sequence of
stochastic integrals of a deterministic function driven by a time-changed
symmetric \alpha-stable L\'evy process. The time change is given by the inverse
\beta-stable subordinator.
|
[{'version': 'v1', 'created': 'Mon, 26 Aug 2013 12:43:40 GMT'}]
|
2013-08-27
|
[array(['Scalas', 'Enrico', ''], dtype=object)
array(['Viles', 'Noèlia', ''], dtype=object)]
|
6,487 |
1908.05221
|
Yvonne Geyer
|
Yvonne Geyer, Ricardo Monteiro, Ricardo Stark-Much\~ao
|
Two-Loop Scattering Amplitudes: Double-Forward Limit and
Colour-Kinematics Duality
|
32 pages plus appendices, 17 figures
| null |
10.1007/JHEP12(2019)049
|
QMUL-PH-19-18
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose new formulae for the two-loop n-point D-dimensional integrands of
scattering amplitudes in Yang-Mills theory and gravity. The loop integrands are
written as a double-forward limit of tree-level trivalent diagrams, and are
inferred from the formalism of the two-loop scattering equations. We discuss
the relationship between the formulae for non-supersymmetric theories and the
Neveu-Schwarz sector of the formulae for maximally supersymmetric theories,
which can be derived from ambitwistor strings. An important property of the
loop integrands is that they are expressed in a representation that includes
linear-type propagators. This representation exhibits a loop-level version of
the colour-kinematics duality, which follows directly from tree level via the
double-forward limit.
|
[{'version': 'v1', 'created': 'Wed, 14 Aug 2019 16:50:33 GMT'}]
|
2020-01-29
|
[array(['Geyer', 'Yvonne', ''], dtype=object)
array(['Monteiro', 'Ricardo', ''], dtype=object)
array(['Stark-Muchão', 'Ricardo', ''], dtype=object)]
|
6,488 |
1308.1390
|
Aurelien Bouvier
|
Aurelien Bouvier, Lloyd Gebremedhin, Caitlin Johnson, Andrey
Kuznetsov, David Williams, Nepomuk Otte, Robert Strausbaugh, Naoya Hidaka,
Hiroyasu Tajima, Jim Hinton, Richard White, Manel Errando and Reshmi
Mukherjee
|
Photosensor Characterization for the Cherenkov Telescope Array: Silicon
Photomultiplier versus Multi-Anode Photomultiplier Tube
|
submitted to SPIE Optics+Photonics proceedings
| null |
10.1117/12.2023778
| null |
astro-ph.IM physics.ins-det
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Photomultiplier tube technology has been the photodetector of choice for the
technique of imaging atmospheric Cherenkov telescopes since its birth more than
50 years ago. Recently, new types of photosensors are being contemplated for
the next generation Cherenkov Telescope Array. It is envisioned that the array
will be partly composed of telescopes using a Schwarzschild-Couder two mirror
design never built before which has significantly improved optics. The camera
of this novel optical design has a small plate scale which enables the use of
compact photosensors. We present an extensive and detailed study of the two
most promising devices being considered for this telescope design: the silicon
photomultiplier and the multi-anode photomultiplier tube. We evaluated their
most critical performance characteristics for imaging gamma-ray showers, and we
present our results in a cohesive manner to clearly evaluate the advantages and
disadvantages that both types of device have to offer in the context of GeV-TeV
gamma-ray astronomy.
|
[{'version': 'v1', 'created': 'Tue, 6 Aug 2013 19:48:01 GMT'}]
|
2013-09-17
|
[array(['Bouvier', 'Aurelien', ''], dtype=object)
array(['Gebremedhin', 'Lloyd', ''], dtype=object)
array(['Johnson', 'Caitlin', ''], dtype=object)
array(['Kuznetsov', 'Andrey', ''], dtype=object)
array(['Williams', 'David', ''], dtype=object)
array(['Otte', 'Nepomuk', ''], dtype=object)
array(['Strausbaugh', 'Robert', ''], dtype=object)
array(['Hidaka', 'Naoya', ''], dtype=object)
array(['Tajima', 'Hiroyasu', ''], dtype=object)
array(['Hinton', 'Jim', ''], dtype=object)
array(['White', 'Richard', ''], dtype=object)
array(['Errando', 'Manel', ''], dtype=object)
array(['Mukherjee', 'Reshmi', ''], dtype=object)]
|
6,489 |
1404.2815
|
Dominik St\"ager
|
D. V. St\"ager, N. A. M. Ara\'ujo, H. J. Herrmann
|
Usage leading to an abrupt collapse of connectivity
|
9 pages, 12 figures
|
Physical Review E 90, 042148 (2014)
|
10.1103/PhysRevE.90.042148
| null |
physics.soc-ph cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Network infrastructures are essential for the distribution of resources such
as electricity and water. Typical strategies to assess their resilience focus
on the impact of a sequence of random or targeted failures of network nodes or
links. Here we consider a more realistic scenario, where elements fail based on
their usage. We propose a dynamic model of transport based on the
Bak-Tang-Wiesenfeld sandpile model where links fail after they have transported
more than an amount $\mu$ (threshold) of the resource and we investigate it on
the square lattice. As we deal with a new model, we provide insight on its
fundamental behavior and dependence on parameters. We observe that for low
values of the threshold due to a positive feedback of link failure, an
avalanche develops that leads to an abrupt collapse of the lattice. By
contrast, for high thresholds the lattice breaks down in an uncorrelated
fashion. We determine the critical threshold $\mu^*$ separating these two
regimes and show how it depends on the toppling threshold of the nodes and the
mass increment added stepwise to the system. We find that the time of major
disconnection is well described with a linear dependence on $\mu$. Furthermore,
we propose a lower bound for $\mu^*$ by measuring the strength of the dynamics
leading to abrupt collapses.
|
[{'version': 'v1', 'created': 'Thu, 10 Apr 2014 14:06:29 GMT'}
{'version': 'v2', 'created': 'Mon, 3 Nov 2014 13:54:33 GMT'}]
|
2014-11-04
|
[array(['Stäger', 'D. V.', ''], dtype=object)
array(['Araújo', 'N. A. M.', ''], dtype=object)
array(['Herrmann', 'H. J.', ''], dtype=object)]
|
6,490 |
1706.03483
|
Vidar Gudmundsson
|
Vidar Gudmundsson, Nzar Rauf Abdullah, Anna Sitek, Hsi-Sheng Goan,
Chi-Shung Tang, and Andrei Manolescu
|
Electroluminescence caused by the transport of interacting electrons
through parallel quantum dots in a photon cavity
|
RevTeX, 14 pages with 18 eps-figures included
|
Annalen der Physik 530, 1700334 (2018)
|
10.1002/andp.201700334
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that a Rabi-splitting of the states of strongly interacting electrons
in parallel quantum dots embedded in a short quantum wire placed in a photon
cavity can be produced by either the para- or the dia-magnetic electron-photon
interactions when the geometry of the system is properly accounted for and the
photon field is tuned close to a resonance with the electron system. We use
these two resonances to explore the electroluminescence caused by the transport
of electrons through the one- and two-electron ground states of the system and
their corresponding conventional and vacuum electroluminescense as the central
system is opened up by coupling it to external leads acting as electron
reservoirs. Our analysis indicates that high-order electron-photon processes
are necessary to adequately construct the cavity-photon dressed electron states
needed to describe both types of electroluminescence.
|
[{'version': 'v1', 'created': 'Mon, 12 Jun 2017 06:45:12 GMT'}]
|
2018-03-08
|
[array(['Gudmundsson', 'Vidar', ''], dtype=object)
array(['Abdullah', 'Nzar Rauf', ''], dtype=object)
array(['Sitek', 'Anna', ''], dtype=object)
array(['Goan', 'Hsi-Sheng', ''], dtype=object)
array(['Tang', 'Chi-Shung', ''], dtype=object)
array(['Manolescu', 'Andrei', ''], dtype=object)]
|
6,491 |
2301.09648
|
Enrico Di Teodoro
|
Enrico M. Di Teodoro, Josh E. G. Peek and John F. Wu
|
Identification of galaxy shreds in large photometric catalogs using
Convolutional Neural Networks
|
Accepted for publication in AJ
| null |
10.3847/1538-3881/acb53a
| null |
astro-ph.GA astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Contamination from galaxy fragments, identified as sources, is a major issue
in large photometric galaxy catalogs. In this paper, we prove that this problem
can be easily addressed with computer vision techniques. We use image cutouts
to train a convolutional neural network (CNN) to identify catalogued sources
that are in reality just star formation regions and/or shreds of larger
galaxies. The CNN reaches an accuracy ~98% on our testing datasets. We apply
this CNN to galaxy catalogs from three amongst the largest surveys available
today: the Sloan Digital Sky Survey (SDSS), the DESI Legacy Imaging Surveys and
the Panoramic Survey Telescope and Rapid Response System Survey (Pan-STARSS).
We find that, even when strict selection criteria are used, all catalogs still
show a ~5% level of contamination from galaxy shreds. Our CNN gives a simple
yet effective solution to clean galaxy catalogs from these contaminants.
|
[{'version': 'v1', 'created': 'Mon, 23 Jan 2023 19:00:00 GMT'}]
|
2023-03-01
|
[array(['Di Teodoro', 'Enrico M.', ''], dtype=object)
array(['Peek', 'Josh E. G.', ''], dtype=object)
array(['Wu', 'John F.', ''], dtype=object)]
|
6,492 |
1710.04493
|
John Kirk
|
John G. Kirk and Gwenael Giacinti
|
Inductive spikes in the Crab Nebula - a theory of gamma-ray flares
|
5 pages, 2 figures, Supplemental material at
https://www.dropbox.com/s/bqx8pn1vb7jzcs5/Supplemental.pdf?dl=0
|
Phys. Rev. Lett. 119, 211101 (2017)
|
10.1103/PhysRevLett.119.211101
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that the mysterious, rapidly variable emission at ~400 MeV observed
from the Crab Nebula by the AGILE and Fermi experiments could be the result of
a sudden drop in the mass-loading of the pulsar wind. The current required to
maintain wave activity in the wind is then carried by very few particles of
high Lorentz factor. On impacting the Nebula, these particles produce a tightly
beamed, high luminosity burst of hard gamma-rays, similar to those observed.
This implies (i) the emission is synchrotron radiation in the toroidal field of
the Nebula, and, therefore, linearly polarized and (ii) this mechanism
potentially contributes to the gamma-ray emission from other powerful pulsars,
such as the Magellanic Cloud objects J0537-6910 and B0540-69.
|
[{'version': 'v1', 'created': 'Thu, 12 Oct 2017 13:19:32 GMT'}]
|
2017-11-29
|
[array(['Kirk', 'John G.', ''], dtype=object)
array(['Giacinti', 'Gwenael', ''], dtype=object)]
|
6,493 |
2107.08682
|
Maciej Borodzik
|
Maciej Borodzik, Monika Szczepanowska
|
Triangulating surfaces with bounded energy
|
13 pages, 7 pictures
| null | null | null |
math.DG math.GT
|
http://creativecommons.org/licenses/by/4.0/
|
We show that if a closed $C^1$-smooth surface in a Riemannian manifold has
bounded Kolasinski--Menger energy, then
it can be triangulated with triangles whose number is bounded by the energy
and the area. Each of the triangles is an image
of a subset of a plane under a diffeomorphism whose distortion is bounded by
$\sqrt{2}$.
|
[{'version': 'v1', 'created': 'Mon, 19 Jul 2021 08:41:33 GMT'}]
|
2021-07-20
|
[array(['Borodzik', 'Maciej', ''], dtype=object)
array(['Szczepanowska', 'Monika', ''], dtype=object)]
|
6,494 |
astro-ph/0204143
|
Bruce Elmegreen
|
Bruce G. Elmegreen (1), Jan Palous (2), Sona Ehlerova (2) ((1) IBM
T.J. Watson Research Center, (2) Astronomical Institute, Academy of Sciences
of the Czech Republic)
|
Environmental Dependencies for Star Formation Triggered by Expanding
Shell Collapse
|
7 pages, 6 figures, MNRAS in press
|
Mon.Not.Roy.Astron.Soc. 334 (2002) 693
|
10.1046/j.1365-8711.2002.05559.x
| null |
astro-ph
| null |
Criteria for gravitational collapse of expanding shells in rotating, shearing
galaxy disks were determined using three-dimensional numerical simulations in
the thin shell approximation. The simulations were run over a grid of 7
independent variables, and the resultant probabilities for triggering and
unstable masses were determined as functions of 8 dimensionless parameters.
When the ratio of the midplane gas density to the midplane total density is
small, an expanding shell reaches the disk scale height and vents to the halo
before it collapses. When the Toomre instability parameter Q, or a similar
shear parameter, Q_A, are large, Coriolis forces and shear stall or reverse the
collapse before the shell accumulates enough mass to be unstable. With large
values of C=c_sh/(GL)^0.2, for rms velocity dispersion c_sh in the swept-up
matter and shell-driving luminosity L, the pressure in the accumulated gas is
too large to allow collapse during the expansion time. Considering ~5000 models
covering a wide range of parameter space, the common properties of shell
collapse as a mechanism for triggered star formation are: (1) the time scale is
4*sqrt(C/2 pi G rho) for ambient midplane density rho, (2) the total fragment
mass is ~2x10^7 Msun, of which only a small fraction is likely to be molecular,
(3) the triggering radius is ~2 times the scale height, and the triggering
probability is ~0.5 for large OB associations. Star formation triggered by
shell collapse should be most common in gas-rich galaxies, such as young
galaxies or those with late Hubble types.
|
[{'version': 'v1', 'created': 'Tue, 9 Apr 2002 02:26:19 GMT'}]
|
2009-11-07
|
[array(['Elmegreen', 'Bruce G.', ''], dtype=object)
array(['Palous', 'Jan', ''], dtype=object)
array(['Ehlerova', 'Sona', ''], dtype=object)]
|
6,495 |
cond-mat/0007133
|
Farhan Saif
|
Aiman Al-Omari, A. H. Nayyar
|
Dimerization of Ferrimagnets on Chains and Square Lattices
|
10 pages, 14 Postscript figures, RevTex format
| null | null | null |
cond-mat
| null |
A linear spin wave analysis of dimerization of alternating Heisenberg system
with spins $s_{1}$ and $s_{2}$ on linear chain as well as square lattice is
presented. Among the several possible dimerized configurations considered in
two dimensions the plaquette configuration is found to be energetically the
most favored one. Inclusion of a variable nearest neighbor exchange coupling
$J(a)=\frac{J}{a}$ leads to a uniform power law behavior: that is to say, the
same $\delta $-dependence is found (i) in chains as well as in square lattices;
(ii) in systems consisting of different pairs of spins $s_{1}$ and $s_{2}$;
(iii) for the magnetic energy gain, the energy gap, the energy of the gapped
magnetic excitation mode as well as for the sublattice magnetization; (iv) for
all the configurations of the square lattice; and (v) in the entire range of
$\delta :$ $(0\leq \delta <1)$. The variable exchange coupling also allows \
the energy of the gapped excitation spectrum to be $\delta $-dependent even in
the linear spin wave theory.
|
[{'version': 'v1', 'created': 'Fri, 7 Jul 2000 14:11:29 GMT'}]
|
2007-05-23
|
[array(['Al-Omari', 'Aiman', ''], dtype=object)
array(['Nayyar', 'A. H.', ''], dtype=object)]
|
6,496 |
1204.6015
|
Michael Deem
|
Keyao Pan and Michael W. Deem
|
A Multi-Scale Model for Correlation in B Cell VDJ Usage of Zebrafish
|
29 pages, 10 figures, 1 table
|
Phys. Biol. 8 (2011) 055006
|
10.1088/1478-3975/8/5/055006
| null |
q-bio.PE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The zebrafish (\emph{Danio rerio}) is one of the model animals for study of
immunology because the dynamics in the adaptive immune system of zebrafish are
similar to that in higher animals. In this work, we built a multi-scale model
to simulate the dynamics of B cells in the primary and secondary immune
responses of zebrafish. We use this model to explain the reported correlation
between VDJ usage of B cell repertoires in individual zebrafish. We use a delay
ordinary differential equation (ODE) system to model the immune responses in
the 6-month lifespan of a zebrafish. This mean field theory gives the number of
high affinity B cells as a function of time during an infection. The sequences
of those B cells are then taken from a distribution calculated by a
"microscopic" random energy model. This generalized $NK$ model shows that
mature B cells specific to one antigen largely possess a single VDJ
recombination. The model allows first-principles calculation of the
probability, $p$, that two zebrafish responding to the same antigen will select
the same VDJ recombination. This probability $p$ increases with the B cell
population size and the B cell selection intensity. The probability $p$
decreases with the B cell hypermutation rate. The multi-scale model predicts
correlations in the immune system of the zebrafish that are highly similar to
that from experiment.
|
[{'version': 'v1', 'created': 'Thu, 26 Apr 2012 19:09:22 GMT'}]
|
2015-06-04
|
[array(['Pan', 'Keyao', ''], dtype=object)
array(['Deem', 'Michael W.', ''], dtype=object)]
|
6,497 |
1809.00566
|
Marc Wolf
|
Wolf Marc, Wolf Fran\c{c}ois, Villemin Fran\c{c}ois-Xavier
|
On the distribution of composite odd numbers
| null |
Volume 10, Issue 2, November 2018, Pages 39-55 of the Fundamental
J. Math. Math. Sci
| null | null |
math.GM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study odd numbers through a straightforward indexing. We focus in
particular on odd prime and composite numbers and their distribution. With a
counting argument, we calculate the limit of two sums and compare their
convergence rate.
|
[{'version': 'v1', 'created': 'Mon, 3 Sep 2018 11:57:16 GMT'}]
|
2018-12-11
|
[array(['Marc', 'Wolf', ''], dtype=object)
array(['François', 'Wolf', ''], dtype=object)
array(['François-Xavier', 'Villemin', ''], dtype=object)]
|
6,498 |
2304.01742
|
Jiakai Li
|
Jiakai Li
|
Real Monopole Floer Homology and Skein Exact Triangles
|
29 pages, 12 figures
| null | null | null |
math.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove an unoriented skein extract triangle for the real monopole Floer
homology and introduce a Fr{\o}yshov-type invariant.
|
[{'version': 'v1', 'created': 'Tue, 4 Apr 2023 12:25:41 GMT'}]
|
2023-04-05
|
[array(['Li', 'Jiakai', ''], dtype=object)]
|
6,499 |
1911.04796
|
Haopeng Yan
|
Minyong Guo, Shupeng Song and Haopeng Yan
|
Observational signature of a near-extremal Kerr-Sen black hole in the
heterotic string theory
|
12 pages, 1 figure and 1 table. Reference added, published in PRD
|
Phys. Rev. D 101, 024055 (2020)
|
10.1103/PhysRevD.101.024055
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analytically study the optical appearance of an isotropically emitter
orbiting near the horizon of a near-extremely rotating Kerr-Sen (KS) black hole
which is an electrically charged black hole arising in heterotic string theory.
We study the influence of the Sen charge on the observational quantities,
including the image position, flux and redshift factor. Moreover, we compare
the results with those for a near-extremal Kerr-Newman (KN) black hole, which
is the charged rotating black hole in general relativity. We find quantitative
corrections of the signatures of these charged black holes (both KS and KN)
compare to that of a neutral Kerr black hole. This may serve as distinctive
features of different black holes for future tests by the Event Horizon
Telescope.
|
[{'version': 'v1', 'created': 'Tue, 12 Nov 2019 11:17:20 GMT'}
{'version': 'v2', 'created': 'Sun, 2 Feb 2020 16:55:18 GMT'}]
|
2020-02-05
|
[array(['Guo', 'Minyong', ''], dtype=object)
array(['Song', 'Shupeng', ''], dtype=object)
array(['Yan', 'Haopeng', ''], dtype=object)]
|
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