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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
16,500 |
mtrl-th/9605001
|
Ronald Cohen
|
R. E. Cohen and J. S. Weitz
|
The Melting Curve and Premelting of MgO
|
Proceedings US Japan Seminar '96 High Pressure-Temperature Research:
Properties of Earth and Planetary Materials, 17 pages plus 7 figures, latex,
agums style (available from ftp://192.102.233.2/agutex/)
| null | null | null |
mtrl-th cond-mat.mtrl-sci
| null |
The melting curve for MgO was obtained using molecular dynamics and a
non-empirical, many-body potential. We also studied premelting effects by
computing the dynamical structure factor in the crystal on approach to melting.
The melting curve simulations were performed with periodic boundary conditions
with cells up to 512 atoms using the ab-initio Variational Induced Breathing
(VIB) model. The melting curve was obtained by computing $% \Delta H_m$ and
$\Delta V_m$ and integrating the Clapeyron equation. Our $% \Delta H_m$ is in
agreement with previous estimates and we obtain a reasonable $\Delta V_m$, but
our melting slope dT/dP (114 K/GPa) is three times greater than that of Zerr
and Boehler [1994] (35 K/GPa), suggesting a problem with the experimental
melting curve, or an indication of exotic, non-ionic behavior of MgO liquid. We
computed $S(q,\omega)$ from simulations of 1000 atom clusters using the
Potential Induced Breathing (PIB) model. A low frequency peak in the dynamical
structure factor $% S(q,\omega)$ arises below the melting point which appears
to be related to the onset of bulk many-atom diffusive exchanges. These
exchanges may help destabilize the crystalline state and be related to
intrinsic crystalline instability suggested in earlier simulations.
|
[{'version': 'v1', 'created': 'Fri, 3 May 1996 13:28:48 GMT'}]
|
2008-02-03
|
[array(['Cohen', 'R. E.', ''], dtype=object)
array(['Weitz', 'J. S.', ''], dtype=object)]
|
16,501 |
1906.06207
|
Markus Kitza
|
Markus Kitza, Pavel Golik, Ralf Schl\"uter, Hermann Ney
|
Cumulative Adaptation for BLSTM Acoustic Models
|
Submitted to Interspeech 2019
| null | null | null |
cs.CL stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper addresses the robust speech recognition problem as an adaptation
task. Specifically, we investigate the cumulative application of adaptation
methods. A bidirectional Long Short-Term Memory (BLSTM) based neural network,
capable of learning temporal relationships and translation invariant
representations, is used for robust acoustic modelling. Further, i-vectors were
used as an input to the neural network to perform instantaneous speaker and
environment adaptation, providing 8\% relative improvement in word error rate
on the NIST Hub5 2000 evaluation test set. By enhancing the first-pass i-vector
based adaptation with a second-pass adaptation using speaker and environment
dependent transformations within the network, a further relative improvement of
5\% in word error rate was achieved. We have reevaluated the features used to
estimate i-vectors and their normalization to achieve the best performance in a
modern large scale automatic speech recognition system.
|
[{'version': 'v1', 'created': 'Fri, 14 Jun 2019 13:55:12 GMT'}]
|
2019-06-17
|
[array(['Kitza', 'Markus', ''], dtype=object)
array(['Golik', 'Pavel', ''], dtype=object)
array(['Schlüter', 'Ralf', ''], dtype=object)
array(['Ney', 'Hermann', ''], dtype=object)]
|
16,502 |
0901.3667
|
Domingo Anibal Garcia-Hernandez Dr.
|
D. A. Garcia-Hernandez, K. H. Hinkle, David. L. Lambert, K. Eriksson
|
CNO abundances of HdC and RCB stars: a view of the nucleosynthesis in a
white dwarf merger
|
accepted for publication in The Astrophysical Journal (42 pages, 24
figures and 3 Tables)
|
Astrophys.J.696:1733-1754,2009
|
10.1088/0004-637X/696/2/1733
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present high-resolution (R~50,000) observations of near-IR transitions of
CO and CN of the five known hydrogen-deficient carbon (HdC) stars and four R
Coronae Borealis (RCB) stars. We perform an abundance analysis of these stars
by using spectrum synthesis and state-of-the-art MARCS model atmospheres for
cool hydrogen-deficient stars. Our analysis confirms reports by Clayton and
colleagues that those HdC stars exhibiting CO lines in their spectrum and the
cool RCB star S Aps are strongly enriched in 18O (with 16O/18O ratios ranging
from 0.3 to 16). Nitrogen and carbon are in the form of 14N and 12C,
respectively. Elemental abundances for CNO are obtained from CI, C2, CN, and CO
lines. Difficulties in deriving the carbon abundance are discussed. Abundances
of Na from NaI lines and S from SI lines are obtained. Elemental and isotopic
CNO abundances suggest that HdC and RCB stars may be related objects and that
they probably formed from a merger of a He white dwarf with a C-O white dwarf.
|
[{'version': 'v1', 'created': 'Fri, 23 Jan 2009 12:48:58 GMT'}]
|
2011-02-11
|
[array(['Garcia-Hernandez', 'D. A.', ''], dtype=object)
array(['Hinkle', 'K. H.', ''], dtype=object)
array(['Lambert', 'David. L.', ''], dtype=object)
array(['Eriksson', 'K.', ''], dtype=object)]
|
16,503 |
cond-mat/0306342
|
Leonid P. Pryadko
|
Leonid P. Pryadko, Steven A. Kivelson, Oron Zachar
|
Incipient order in the t-J model at high temperatures
|
4 pages, 5 eps figures included; ERRATUM 2 pages, 3 eps figures
correcting the error in the series for superconducting susceptibilities
|
Phys. Rev. Lett. 92, 067002 (2004)
|
10.1103/PhysRevLett.92.067002
| null |
cond-mat.str-el cond-mat.supr-con
| null |
We analyze the high-temperature behavior of the susceptibilities towards a
number of possible ordered states in the t-J-V model using the high-temperature
series expansion. From all diagrams with up to ten edges, reliable results are
obtained down to temperatures of order J, or (with some optimism) to J/2. In
the unphysical regime, t<J, large superconducting susceptibilities are found,
which moreover increase with decreasing temperatures, but for t>J, these
susceptibilities are small and decreasing with decreasing temperature; this
suggests that the t-J model does not support high-temperature
superconductivity. We also find modest evidence of a tendency toward nematic
and d-density wave orders.
ERRATUM: Due to an error in the calculation, the series for d-wave
supeconducting and extended s-wave superconducting orders were incorrect. We
recalculate the series and give the replacement figures. In agreement with our
earlier findings, we still find no evidence of any strong enhancement of the
superconducting susceptibility with decreasing temperature. However, because
different Pade approximants diverge from each other at somewhat higher
temperatures than we originally found, it is less clear what this implies
concerning the presence or absence of high-temperature superconductivity in the
t-J model.
|
[{'version': 'v1', 'created': 'Thu, 12 Jun 2003 19:33:54 GMT'}
{'version': 'v2', 'created': 'Wed, 3 Jan 2007 17:36:33 GMT'}]
|
2007-05-23
|
[array(['Pryadko', 'Leonid P.', ''], dtype=object)
array(['Kivelson', 'Steven A.', ''], dtype=object)
array(['Zachar', 'Oron', ''], dtype=object)]
|
16,504 |
astro-ph/9909345
|
Marcio Catelan
|
M. Catelan (U. of Virginia)
|
Mass Loss on the Red Giant Branch and the Second-Parameter Phenomenon
|
6 pages, 3 figures. To appear in "The Galactic Halo: from Globular
Clusters to Field Stars"
| null | null | null |
astro-ph
| null |
The "second-parameter effect" is characterized by the existence of globular
clusters (GCs) with similar metallicity [Fe/H] (the "first parameter") but
different horizontal-branch (HB) morphologies. One of the primary
second-parameter candidates is cluster age. In the present paper, we address
the following issue: "Are the age differences between second-parameter GCs, as
derived from their main-sequence turnoff properties, consistent with their
relative HB types?" In order to provide an answer to this question, several
analytical formulae for the mass loss rate on the red giant branch are analyzed
and employed. The case of M5 vs. Palomar 4/Eridanus is specifically discussed.
Our results show that, irrespective of the mass loss formula employed, the
relative turnoff ages of GCs are insufficient to explain the second-parameter
phenomenon, unless GCs are younger than 10 Gyr.
|
[{'version': 'v1', 'created': 'Tue, 21 Sep 1999 01:13:11 GMT'}]
|
2007-05-23
|
[array(['Catelan', 'M.', '', 'U. of Virginia'], dtype=object)]
|
16,505 |
math/0608265
|
Fred W. Roush
|
K. H. Kim and F. W. Roush
|
Counterexample to the Hodge Conjecture
|
We no longer claim to have disproved the Hodge conjecture. Section 5
is deleted except for 5.3, and Theorems 6.2,6.3 are deleted
| null | null | null |
math.AG
| null |
We construct a K3 surface whose transcendental lattice has a self-isomorphism
which is not a linear combination of self-isomorphisms over $\mathbb{Q}$ which
preserve cup products up to nonzero multiples. Products of it with itself give
candidates for counterexamples to the Hodge conjecture which may be of
interest. We also study the Kuga-Satake construction in relation to these
examples.
|
[{'version': 'v1', 'created': 'Thu, 10 Aug 2006 17:12:25 GMT'}
{'version': 'v2', 'created': 'Tue, 22 Aug 2006 21:22:11 GMT'}]
|
2007-05-23
|
[array(['Kim', 'K. H.', ''], dtype=object)
array(['Roush', 'F. W.', ''], dtype=object)]
|
16,506 |
1801.02158
|
Jialin Dong
|
Jialin Dong, Kai Yang, and Yuanming Shi
|
Blind Demixing for Low-Latency Communication
|
14 pages, accepted by IEEE Transaction on Wireless Communication
| null | null | null |
cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the next generation wireless networks, lowlatency communication is
critical to support emerging diversified applications, e.g., Tactile Internet
and Virtual Reality. In this paper, a novel blind demixing approach is
developed to reduce the channel signaling overhead, thereby supporting
low-latency communication. Specifically, we develop a low-rank approach to
recover the original information only based on a single observed vector without
any channel estimation. Unfortunately, this problem turns out to be a highly
intractable non-convex optimization problem due to the multiple non-convex
rankone constraints. To address the unique challenges, the quotient manifold
geometry of product of complex asymmetric rankone matrices is exploited by
equivalently reformulating original complex asymmetric matrices to the
Hermitian positive semidefinite matrices. We further generalize the geometric
concepts of the complex product manifolds via element-wise extension of the
geometric concepts of the individual manifolds. A scalable Riemannian
trust-region algorithm is then developed to solve the blind demixing problem
efficiently with fast convergence rates and low iteration cost. Numerical
results will demonstrate the algorithmic advantages and admirable performance
of the proposed algorithm compared with the state-of-art methods.
|
[{'version': 'v1', 'created': 'Sun, 7 Jan 2018 08:28:05 GMT'}
{'version': 'v2', 'created': 'Thu, 6 Dec 2018 09:18:17 GMT'}]
|
2018-12-07
|
[array(['Dong', 'Jialin', ''], dtype=object)
array(['Yang', 'Kai', ''], dtype=object)
array(['Shi', 'Yuanming', ''], dtype=object)]
|
16,507 |
physics/0003056
|
Kirk T. McDonald
|
Kirk T. McDonald
|
Axicon Gaussian Laser Beams
|
v2 adds one figure and one reference
| null | null | null |
physics.optics
| null |
We deduce the simplest form for an axicon Gaussian laser beam, i.e., one with
radial polarization of the electric field.
|
[{'version': 'v1', 'created': 'Thu, 23 Mar 2000 19:50:16 GMT'}
{'version': 'v2', 'created': 'Sun, 30 Apr 2000 21:25:49 GMT'}]
|
2007-05-23
|
[array(['McDonald', 'Kirk T.', ''], dtype=object)]
|
16,508 |
math/0204127
|
Elliott Pearl
|
Chris Good, Robin W. Knight and Abdul M. Mohamad
|
On the metrizability of spaces with a sharp base
|
10 pages. Reprinted from Topology and its Applications, in press,
Chris Good, Robin W. Knight and Abdul M. Mohamad, On the metrizability of
spaces with a sharp base
|
Proceedings of the Ninth Prague Topological Symposium, (Prague,
2001), pp. 125--134, Topology Atlas, Toronto, 2002
| null | null |
math.GN
| null |
A base $\mathcal{B}$ for a space $X$ is said to be sharp if, whenever $x\in
X$ and $(B_n)_{n\in\omega}$ is a sequence of pairwise distinct elements of
$\mathcal{B}$ each containing $x$, the collection $\{\bigcap_{j\le
n}B_j:n\in\omega\}$ is a local base at $x$. We answer questions raised by
Alleche et al. and Arhangel$'$ski\u{\i} et al. by showing that a pseudocompact
Tychonoff space with a sharp base need not be metrizable and that the product
of a space with a sharp base and $[0,1]$ need not have a sharp base. We prove
various metrization theorems and provide a characterization along the lines of
Ponomarev's for point countable bases.
|
[{'version': 'v1', 'created': 'Wed, 10 Apr 2002 17:11:09 GMT'}]
|
2007-05-23
|
[array(['Good', 'Chris', ''], dtype=object)
array(['Knight', 'Robin W.', ''], dtype=object)
array(['Mohamad', 'Abdul M.', ''], dtype=object)]
|
16,509 |
1409.1058
|
Maxim Zabzine
|
Jian Qiu and Maxim Zabzine
|
On twisted N=2 5D super Yang-Mills theory
|
30 pages, the vanishing theorem is improved, refs added
|
Lett.Math.Phys. 106 (2016) 1-27
|
10.1007/s11005-015-0804-8
| null |
hep-th math-ph math.DG math.MP math.SG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
On a five dimensional simply connected Sasaki-Einstein manifold, one can
construct Yang-Mills theories coupled to matter with at least two
supersymmetries. The partition function of these theories localises on the
contact instantons, however the contact instanton equations are not elliptic.
It turns out that these equations can be embedded into the Haydys-Witten
equations (which are elliptic) in the same way the 4D anti-self-dual instanton
equations are embedded in the Vafa-Witten equations. We show that under some
favourable circumstances, the latter equations will reduce to the former by
proving some vanishing theorems. It was also known that the Haydys-Witten
equations on product manifolds $M_5=M_4\times \mathbb{R}$ arise in the context
of twisting the 5D maximally supersymmetric Yang-Mills theory. In this paper,
we present the construction of twisted $N=2$ Yang-Mills theory on
Sasaki-Einstein manifolds, and more generally on $K$-contact manifolds. The
localisation locus of this new theory thus provides a covariant version of the
Haydys-Witten equation.
|
[{'version': 'v1', 'created': 'Wed, 3 Sep 2014 12:27:35 GMT'}
{'version': 'v2', 'created': 'Sat, 15 Aug 2015 17:38:42 GMT'}]
|
2016-01-05
|
[array(['Qiu', 'Jian', ''], dtype=object)
array(['Zabzine', 'Maxim', ''], dtype=object)]
|
16,510 |
1312.2876
|
Dao-Xin Yao
|
Cheng Luo, Trinanjan Datta and Dao-Xin Yao
|
Spectrum splitting of bimagnon excitations in a spatially frustrated
Heisenberg antiferromagnet revealed by resonant inelastic x-ray scattering
|
10 pages, 8 figures
|
Phys. Rev. B 89, 165103 (2014)
|
10.1103/PhysRevB.89.165103
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We perform a comprehensive analysis of the bimagnon resonant inelastic x-ray
scattering (RIXS) intensity spectra of the spatially frustrated Jx-Jy-J2
Heisenberg model on a square lattice in both the antiferromagnetic and the
collinear antiferromagnetic phase. We study the model for strong frustration
and significant spatial anisotropy to highlight the key signatures of RIXS
spectrum splitting which may be experimentally discernible. Based on an
interacting spin wave theory study within the ladder approximation
Bethe-Salpeter scheme, we find the appearance of a robust two-peak structure
over a wide range of the transferred momenta in both magnetically ordered
phases. The unfrustrated model has a single-peak structure with a two-peak
splitting originating due to spatial anisotropy and frustrated interactions.
Our predicted two-peak structure from both magnetically ordered regime can be
realized in iron pnictides.
|
[{'version': 'v1', 'created': 'Tue, 10 Dec 2013 17:03:35 GMT'}
{'version': 'v2', 'created': 'Mon, 14 Apr 2014 09:38:26 GMT'}]
|
2014-04-15
|
[array(['Luo', 'Cheng', ''], dtype=object)
array(['Datta', 'Trinanjan', ''], dtype=object)
array(['Yao', 'Dao-Xin', ''], dtype=object)]
|
16,511 |
1112.4313
|
Alexander Buki
|
A. Yu. Buki
|
Methods of Measuring Physical Characteristics of Partial Components of
Multicomponent Samples
|
5 pages, 1 figure
|
The Journal of Kharkiv National University, No.916, Is.3(47), 73
(2010) (in Russian)
| null | null |
physics.data-an nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Consideration is given to the methods of gaining experimental data on the
substances which constitute a part of multicomponent samples to be measured.
The methods are applicable to the samples comprising an arbitrary number of
components; their use is not restricted to single-type experiments only. The
application of the methods is demonstrated with an example of obtaining the
spectra of electrons scattered by 6Li and 7Li nuclei, which were measured from
two targets having different isotopic compositions. As a result of the proposed
methods, spectra were obtained for the electrons scattered by the nuclei of
each of the constituent isotopes, as if the experiment were made on
isotopically pure targets.
|
[{'version': 'v1', 'created': 'Mon, 19 Dec 2011 12:03:31 GMT'}]
|
2011-12-20
|
[array(['Buki', 'A. Yu.', ''], dtype=object)]
|
16,512 |
cond-mat/0207406
|
Pawar S. H.
|
S. H. Pawar, A. B. Jadhav, P. M. Shirage and D. D. Shivagan
|
Electrochemical synthesis of superconducting MgB2 thin films: a novel
potential technique
|
12 pages, 5 figures. Submitted to Journal of Physics: Condensed
Matter
| null | null | null |
cond-mat.supr-con cond-mat.mtrl-sci
| null |
A complexing molecule electrodeposition technique has been developed for the
deposition of low cost, lightweight MgB2 films, for the first time. Different
deposition parameters such as bath composition, deposition potential, current
density, deposition time were studied and optimized to give uniform,
homogeneous and sticky films. The MgB2 films were deposited at a constant
potential of -1.3 V with respect to Saturated Calomel Electrode (SCE) onto
silver substrate from aqueous bath and at -3.2 V with respect to SCE electrode
onto silver substrate from non-aqueous bath. XRD, SEM and EDAX techniques are
used to characterize these films. The films formed from non-aqueous
electrochemical bath show the superconducting transition temperature at Tc =
36.4 K. The method developed is of less energy inputs than any other existing
methods and of versatile nature having potential for large scale applications
of MgB2 superconductors. PACS numbers: 74.70.Ad, 81.15.Pq, 74.76.-w *Author for
correspondence
|
[{'version': 'v1', 'created': 'Wed, 17 Jul 2002 19:30:59 GMT'}]
|
2007-05-23
|
[array(['Pawar', 'S. H.', ''], dtype=object)
array(['Jadhav', 'A. B.', ''], dtype=object)
array(['Shirage', 'P. M.', ''], dtype=object)
array(['Shivagan', 'D. D.', ''], dtype=object)]
|
16,513 |
1108.2779
|
Brihaye Yves
|
Y. Brihaye
|
Charged, rotating black holes in Einstein-Gauss-Bonnet gravity
|
14 pages, 10 figures, references added
| null | null | null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the Einstein-Gauss-Bonnet equations in five dimensions including
a negative cosmological constant and a Maxwell field. Using an appropriate
Ansatz for the metric and for the electromagnetic fields, we construct
numerically black holes with two equal angular momenta in the two orthogonal
space-like planes of space-time. Families of such solutions, labeled by the
angular momentum and by the electric charge are obtained for many
representative intervals of the Gauss-Bonnet coupling constant $\alpha$. It is
argued that, for fixed values of $\alpha$, the solutions terminate into
extremal black holes at ($\alpha$-dependent) critical values of the angular
momentum and/or of the electric charge. The influence of the Gauss-Bonnet
coupling constant, of the charge and of the cosmological constant on the
thermodynamics of the black holes and on their domain of existence is analyzed.
|
[{'version': 'v1', 'created': 'Sat, 13 Aug 2011 08:59:42 GMT'}
{'version': 'v2', 'created': 'Wed, 30 Nov 2011 10:53:01 GMT'}]
|
2011-12-01
|
[array(['Brihaye', 'Y.', ''], dtype=object)]
|
16,514 |
1110.4125
|
Michael R. Pennington
|
M.R. Pennington
|
Glimpsing Colour in a World of Black and White
|
8 pages, 9 figures. Invited talk at the Rutherford Centennial
Conference on Nuclear Physics, University of Manchester, 8-12 August 2011. To
appear in the Proceedings
| null |
10.1088/1742-6596/381/1/012004
|
JLAB-THY-11-1453
|
nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The past 40 years have taught us that nucleons are built of constituents that
carry colour charges with interactions governed by Quantum Chromodynamics
(QCD). How experiments (past, present and future) at Jefferson Lab probe
colourless nuclei to map out these internal colour degrees of freedom is
presented. When combined with theoretical calculations, these will paint a
picture of how the confinement of quarks and gluons, and the structure of the
QCD vacuum, determine the properties of all (light) strongly interacting
states.
|
[{'version': 'v1', 'created': 'Tue, 18 Oct 2011 21:14:32 GMT'}]
|
2015-05-30
|
[array(['Pennington', 'M. R.', ''], dtype=object)]
|
16,515 |
1907.03644
|
Kirthi Shankar Sivamani
|
Kirthi Shankar Sivamani
|
Unsupervised Domain Alignment to Mitigate Low Level Dataset Biases
|
10 pages, 4 figures, 6 tables, submitted to ICAAI 2019
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Dataset bias is a well-known problem in the field of computer vision. The
presence of implicit bias in any image collection hinders a model trained and
validated on a particular dataset to yield similar accuracies when tested on
other datasets. In this paper, we propose a novel debiasing technique to reduce
the effects of a biased training dataset. Our goal is to augment the training
data using a generative network by learning a non-linear mapping from the
source domain (training set) to the target domain (testing set) while retaining
training set labels. The cycle consistency loss and adversarial loss for
generative adversarial networks are used to learn the mapping. A structured
similarity index (SSIM) loss is used to enforce label retention while
augmenting the training set. Our methods and hypotheses are supported by
quantitative comparisons with prior debiasing techniques. These comparisons
showcase the superiority of our method and its potential to mitigate the
effects of dataset bias during the inference stage.
|
[{'version': 'v1', 'created': 'Mon, 8 Jul 2019 14:22:54 GMT'}
{'version': 'v2', 'created': 'Fri, 12 Jul 2019 00:35:13 GMT'}]
|
2019-07-15
|
[array(['Sivamani', 'Kirthi Shankar', ''], dtype=object)]
|
16,516 |
nucl-th/0406031
|
Jorgen Randrup
|
Jorgen Randrup
|
Signals of spinodal phase decomposition in high-energy nuclear
collisions
|
7 pages, incl 4 ps figures
| null |
10.1556/APH.22.2005.1-2.8
|
LBNL-53598
|
nucl-th hep-ph
| null |
High-energy nuclear collisions produce quark-gluon plasmas that expand and
hadronize. If the associated phase transition is of first order then the
hadronization should proceed through a spinodal phase separation. We explore
here the possibility of identifying the associated clumping by analysis of
suitable N-particle momentum correlations.
|
[{'version': 'v1', 'created': 'Thu, 10 Jun 2004 18:17:59 GMT'}]
|
2016-09-08
|
[array(['Randrup', 'Jorgen', ''], dtype=object)]
|
16,517 |
1905.10199
|
Loic Foissy
|
Lo\"ic Foissy (LMPA)
|
Twisted bialgebras, cofreeness and cointeraction
| null | null | null | null |
math.RA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study twisted bialgebras and double twisted bialgebras, that is to say
bialgebras in the category of linear species, or in the category of species in
the category of coalgebras. We define the notion of cofree twisted coalgebra
and generalize Hoffman's quasi-shuffle product, obtaining in particular a
twisted bialgebra of set compositions Comp. Given a special character , this
twisted bialgebra satisfies a terminal property, generalizing the one of the
Hopf algebra of quasisymmetric functions proved by Aguiar, Bergeron and
Sottile. We give Comp a second coproduct, making it a double twisted bialgebra,
and prove that it is a terminal object in the category of double twisted
bialgebras. Actions of characters on morphisms allow to obtain every twisted
bialgebra morphisms from a connected double twisted bialgebra to Comp. These
results are applied to examples based on graphs and on finite topologies,
obtaining species versions of the chromatic symmetric series and chromatic
polynomials, or of the Ehrhart polynomials. Moreover, through actions of
monoids of characters, we obtain a Twisted bialgebraic interpretation of the
duality principle.
|
[{'version': 'v1', 'created': 'Fri, 24 May 2019 12:45:17 GMT'}
{'version': 'v2', 'created': 'Mon, 6 Feb 2023 12:37:23 GMT'}]
|
2023-02-07
|
[array(['Foissy', 'Loïc', '', 'LMPA'], dtype=object)]
|
16,518 |
1910.08327
|
Huaxing Xu
|
Huaxing Xu, Yaqi Song, Xiaofan Mo, Yitang Dai, Changlei Wang, Shaohua
Wang, Rui Zhang
|
Photonic Integrated Phase Decoder Scheme for High-Speed, Efficient and
Stable Quantum Key Distribution System
|
8 pages, 7 figures
| null | null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Quantum key distribution (QKD) is gradually moving towards network
applications. It is important to improve the performance of QKD systems such as
photonic integration for compact systems, the stability resistant to
environmental disturbances, high key rate, and high efficiency in QKD
applications. In the letter, we propose a general quantum decoding model,
namely orthogonal-polarizations-exchange reflector Michelson interferometer
model, to solve quantum channel disturbance caused by environment. Based on the
model, we give a quantum phase decoder scheme, i.e. a Sagnac configuration
based orthogonal-polarizations-exchange reflector Michelson interferometer
(SRMI). Besides the stability immune to quantum channel disturbance, the SRMI
decoder can be fabricated with photonic integrated circuits, and suitable to
gigahertz phase encoding QKD systems, and can increase the system efficiency
because of the low insertion loss of the decoder.
|
[{'version': 'v1', 'created': 'Fri, 18 Oct 2019 09:49:52 GMT'}]
|
2019-10-21
|
[array(['Xu', 'Huaxing', ''], dtype=object)
array(['Song', 'Yaqi', ''], dtype=object)
array(['Mo', 'Xiaofan', ''], dtype=object)
array(['Dai', 'Yitang', ''], dtype=object)
array(['Wang', 'Changlei', ''], dtype=object)
array(['Wang', 'Shaohua', ''], dtype=object)
array(['Zhang', 'Rui', ''], dtype=object)]
|
16,519 |
2105.09790
|
Eoin \'O Colg\'ain
|
Chethan Krishnan, Roya Mohayaee, Eoin \'O Colg\'ain, M. M.
Sheikh-Jabbari, Lu Yin
|
Does Hubble Tension Signal a Breakdown in FLRW Cosmology?
|
v1 10 pages, comments welcome, especially on appendix D & Figure 4;
v2, typos corrected, Figure 4 improved, observations strengthened; v3
references added, matches version published as invited contribution to CQG
"Focus Issue on the Hubble Constant Tension"
|
2021 Class. Quantum Grav. 38 184001
|
10.1088/1361-6382/ac1a81
| null |
astro-ph.CO gr-qc hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The tension between early and late Universe probes of the Hubble constant has
motivated various new FLRW cosmologies. Here, we reanalyse the Hubble tension
with a recent age of the Universe constraint. This allows us to restrict
attention to matter and a dark energy sector that we treat without assuming a
specific model. Assuming analyticity of the Hubble parameter $H(z)$, and a
generic low redshift modification to flat $\Lambda$CDM, we find that low
redshift data ($z \lesssim 2.5$) and well-motivated priors only permit a dark
energy sector close to the cosmological constant $\Lambda$. This restriction
rules out late Universe modifications within FLRW. We show that early Universe
physics that alters the sound horizon can yield an upper limit of $H_0 \sim 71
\pm 1$ km/s/Mpc. Since various local determinations may be converging to $H_0
\sim 73$ km/s/Mpc, a breakdown of the FLRW framework is a plausible resolution.
We outline how future data, in particular strongly lensed quasar data, could
also provide further confirmations of such a resolution.
|
[{'version': 'v1', 'created': 'Thu, 20 May 2021 14:40:53 GMT'}
{'version': 'v2', 'created': 'Tue, 25 May 2021 14:34:25 GMT'}
{'version': 'v3', 'created': 'Tue, 24 Aug 2021 01:55:47 GMT'}]
|
2021-08-25
|
[array(['Krishnan', 'Chethan', ''], dtype=object)
array(['Mohayaee', 'Roya', ''], dtype=object)
array(['Colgáin', 'Eoin Ó', ''], dtype=object)
array(['Sheikh-Jabbari', 'M. M.', ''], dtype=object)
array(['Yin', 'Lu', ''], dtype=object)]
|
16,520 |
1801.00384
|
Mehrnaz Najafi
|
Mehrnaz Najafi, Lifang He, Philip S. Yu
|
Error-Robust Multi-View Clustering
|
10 pages, 2017 IEEE International Conference on Big Data (Big Data
2017)
| null | null | null |
cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the era of big data, data may come from multiple sources, known as
multi-view data. Multi-view clustering aims at generating better clusters by
exploiting complementary and consistent information from multiple views rather
than relying on the individual view. Due to inevitable system errors caused by
data-captured sensors or others, the data in each view may be erroneous.
Various types of errors behave differently and inconsistently in each view.
More precisely, error could exhibit as noise and corruptions in reality.
Unfortunately, none of the existing multi-view clustering approaches handle all
of these error types. Consequently, their clustering performance is
dramatically degraded. In this paper, we propose a novel Markov chain method
for Error-Robust Multi-View Clustering (EMVC). By decomposing each view into a
shared transition probability matrix and error matrix and imposing structured
sparsity-inducing norms on error matrices, we characterize and handle typical
types of errors explicitly. To solve the challenging optimization problem, we
propose a new efficient algorithm based on Augmented Lagrangian Multipliers and
prove its convergence rigorously. Experimental results on various synthetic and
real-world datasets show the superiority of the proposed EMVC method over the
baseline methods and its robustness against different types of errors.
|
[{'version': 'v1', 'created': 'Mon, 1 Jan 2018 02:42:04 GMT'}]
|
2018-01-03
|
[array(['Najafi', 'Mehrnaz', ''], dtype=object)
array(['He', 'Lifang', ''], dtype=object)
array(['Yu', 'Philip S.', ''], dtype=object)]
|
16,521 |
1205.4724
|
Gurtina Besla
|
Gurtina Besla (Columbia), Lars Hernquist (CfA), Abraham Loeb (CfA)
|
The Origin of the Microlensing Events Observed Towards the LMC and the
Stellar Counterpart of the Magellanic Stream
|
Accepted for publication in MNRAS, 28 pages, 18 figures
| null |
10.1093/mnras/sts192
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce a novel theoretical model to explain the long-standing puzzle of
the nature of the microlensing events reported towards the Large Magellanic
Cloud (LMC) by the MACHO and OGLE collaborations. We propose that a population
of tidally stripped stars from the Small Magellanic Cloud (SMC) located ~4-10
kpc behind a lensing population of LMC disk stars can naturally explain the
observed event durations (17-71 days), event frequencies and spatial
distribution of the reported events. Differences in the event frequencies
reported by the OGLE (~0.33 /yr) and MACHO (~1.75 /yr) surveys appear to be
naturally accounted for by their different detection efficiencies and
sensitivity to faint sources. The presented models of the Magellanic System
were constructed without prior consideration of the microlensing implications.
These results favor a scenario for the interaction history of the Magellanic
Clouds, wherein the Clouds are on their first infall towards the Milky Way and
the SMC has recently collided with the LMC 100-300 Myr ago, leading to a large
number of faint sources distributed non-uniformly behind the LMC disk. In
contrast to self-lensing models, microlensing events are also expected to occur
in fields off the LMC's stellar bar since the stellar debris is not expected to
be concentrated in the bar region. This scenario leads to a number of
observational tests: the sources are low-metallicity SMC stars, they exhibit
high velocities relative to LMC disk stars that may be detectable via proper
motion studies, and, most notably, there should exist a stellar counterpart to
the gaseous Magellanic Stream and Bridge with a V-band surface brightness of >
32 mag/arcsec^2. In particular, the stellar Bridge should contain enough RR
Lyrae stars to be detected by the ongoing OGLE survey of this region.
|
[{'version': 'v1', 'created': 'Mon, 21 May 2012 20:00:06 GMT'}
{'version': 'v2', 'created': 'Thu, 11 Oct 2012 20:00:04 GMT'}]
|
2015-06-05
|
[array(['Besla', 'Gurtina', '', 'Columbia'], dtype=object)
array(['Hernquist', 'Lars', '', 'CfA'], dtype=object)
array(['Loeb', 'Abraham', '', 'CfA'], dtype=object)]
|
16,522 |
1003.5949
|
Raishma Krishnan
|
Raishma Krishnan, Sanjay Puri and Arun M. Jayannavar
|
Reliability of fluctuation-induced transport in a Maxwell-demon-type
engine
|
14 pages, 5 figures
| null |
10.1140/epjb/e2010-10274-x
| null |
cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the transport properties of an overdamped Brownian particle which is
simultaneously in contact with two thermal baths. The first bath is modeled by
an additive thermal noise at temperature $T_A$. The second bath is associated
with a multiplicative thermal noise at temperature $T_B$. The analytical
expressions for the particle velocity and diffusion constant are derived for
this system, and the reliability or coherence of transport is analyzed by means
of their ratio in terms of a dimensionless P\'{e}clet number. We find that the
transport is not very coherent, though one can get significantly higher
currents.
|
[{'version': 'v1', 'created': 'Tue, 30 Mar 2010 23:46:09 GMT'}]
|
2015-05-18
|
[array(['Krishnan', 'Raishma', ''], dtype=object)
array(['Puri', 'Sanjay', ''], dtype=object)
array(['Jayannavar', 'Arun M.', ''], dtype=object)]
|
16,523 |
2010.10005
|
Laurence Boxer
|
Laurence Boxer
|
Subsets and Freezing Sets in the Digital Plane
|
arXiv admin note: text overlap with arXiv:2005.09713
| null | null | null |
math.GT math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We continue the study of freezing sets for digital images introduced in [4,
2, 3]. We prove methods for obtaining freezing sets for digital images (X, c_i)
for X \subset Z^2 and i \in {1, 2}. We give examples to show how these methods
can lead to the determination of minimal freezing sets.
|
[{'version': 'v1', 'created': 'Sun, 18 Oct 2020 00:13:31 GMT'}]
|
2020-10-21
|
[array(['Boxer', 'Laurence', ''], dtype=object)]
|
16,524 |
2202.05538
|
Ayman Elhalwagy
|
Ayman Elhalwagy and Tatiana Kalganova
|
Hybridization of Capsule and LSTM Networks for unsupervised anomaly
detection on multivariate data
|
This work has been submitted to the IEEE for possible publication.
Copyright may be transferred without notice, after which this version may no
longer be accessible
| null |
10.3390/app122211393
| null |
cs.LG
|
http://creativecommons.org/licenses/by/4.0/
|
Deep learning techniques have recently shown promise in the field of anomaly
detection, providing a flexible and effective method of modelling systems in
comparison to traditional statistical modelling and signal processing-based
methods. However, there are a few well publicised issues Neural Networks (NN)s
face such as generalisation ability, requiring large volumes of labelled data
to be able to train effectively and understanding spatial context in data. This
paper introduces a novel NN architecture which hybridises the
Long-Short-Term-Memory (LSTM) and Capsule Networks into a single network in a
branched input Autoencoder architecture for use on multivariate time series
data. The proposed method uses an unsupervised learning technique to overcome
the issues with finding large volumes of labelled training data. Experimental
results show that without hyperparameter optimisation, using Capsules
significantly reduces overfitting and improves the training efficiency.
Additionally, results also show that the branched input models can learn
multivariate data more consistently with or without Capsules in comparison to
the non-branched input models. The proposed model architecture was also tested
on an open-source benchmark, where it achieved state-of-the-art performance in
outlier detection, and overall performs best over the metrics tested in
comparison to current state-of-the art methods.
|
[{'version': 'v1', 'created': 'Fri, 11 Feb 2022 10:33:53 GMT'}]
|
2022-11-30
|
[array(['Elhalwagy', 'Ayman', ''], dtype=object)
array(['Kalganova', 'Tatiana', ''], dtype=object)]
|
16,525 |
1007.1731
|
Chetana Jain
|
Chetana Jain, Biswajit Paul, Anjan Dutta
|
New measurement of orbital and spin period evolution of the Accretion
Disk Corona source 4U 1822-37
|
9 pages, 7 figures, 4 tables, Accepted for publication in MNRAS Main
Journal
| null | null | null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
4U 1822-37 is a Low Mass X-ray Binary (LMXB) system with an Accretion Disk
Corona. We have obtained 16 new mid-eclipse time measurements of this source
during the last 13 years using X- ray observations made with the RXTE-PCA,
RXTE-ASM, Swift-XRT, XMM-Newton and Chandra observatories. These, along with
the earlier known mid-eclipse times have been used to accurately determine the
timescale for a change in the orbital period of 4U 1822-37. We have derived an
orbital period Porb = 0.23210887(15) d, which is changing at the rate of \cdot
Porb = 1.3(3) x 10-10 d d-1 (at T0 = MJD 45614). The timescale for a change in
the orbital period is Porb/ \cdot Porb of 4.9(1.1) x 106 yr. We also report the
detection of 0.59290132(11) s (at T0 = MJD 51975) X-ray pulsations from the
source with a long term average \cdot Pspin of -2.481(4) x 10-12 s s-1, i.e., a
spin-up time scale (Pspin/ \cdot Pspin) of 7578(13) yr. In view of these
results, we have discussed various mechanisms that could be responsible for the
orbital evolution in this system. Assuming the extreme case of conservative
mass transfer, we have found that the measured \cdot Porb requires a large mass
transfer rate of (4.2 - 5.2) x 10-8 M\odot yr-1 which together with the spin up
rate implies a magnetic field strength in the range of (1-3) x 108 G. Using the
long term RXTE-ASM light curve, we have found that the X-ray intensity of the
source has decreased over the last 13 years by ? 40% and there are long term
fluctuations at time scales of about a year. In addition to the long term
intensity variation, we have also observed significant variation in the
intensity during the eclipse.
|
[{'version': 'v1', 'created': 'Sat, 10 Jul 2010 16:21:12 GMT'}]
|
2010-07-13
|
[array(['Jain', 'Chetana', ''], dtype=object)
array(['Paul', 'Biswajit', ''], dtype=object)
array(['Dutta', 'Anjan', ''], dtype=object)]
|
16,526 |
2204.13809
|
Yu Gan
|
Hongshan Liu, Colin Aderon, Noah Wagon, Huapu Liu, Steven MacCall, Yu
Gan
|
Deep Learning-based Automatic Player Identification and Logging in
American Football Videos
| null | null | null | null |
cs.CV eess.IV
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
American football games attract significant worldwide attention every year.
Game analysis systems generate crucial information that can help analyze the
games by providing fans and coaches with a convenient means to track and
evaluate player performance. Identifying participating players in each play is
also important for the video indexing of player participation per play.
Processing football game video presents challenges such as crowded setting,
distorted objects, and imbalanced data for identifying players, especially
jersey numbers. In this work, we propose a deep learning-based football video
analysis system to automatically track players and index their participation
per play. It is a multi-stage network design to highlight area of interest and
identify jersey number information with high accuracy. First, we utilize an
object detection network, a detection transformer, to tackle the player
detection problem in crowded context. Second, we identify players using jersey
number recognition with a secondary convolutional neural network, then
synchronize it with a game clock subsystem. Finally, the system outputs a
complete log in a database for play indexing. We demonstrate the effectiveness
and reliability of player identification and the logging system by analyzing
the qualitative and quantitative results on football videos. The proposed
system shows great potential for implementation in and analysis of football
broadcast video.
|
[{'version': 'v1', 'created': 'Tue, 26 Apr 2022 02:59:03 GMT'}]
|
2022-05-02
|
[array(['Liu', 'Hongshan', ''], dtype=object)
array(['Aderon', 'Colin', ''], dtype=object)
array(['Wagon', 'Noah', ''], dtype=object)
array(['Liu', 'Huapu', ''], dtype=object)
array(['MacCall', 'Steven', ''], dtype=object)
array(['Gan', 'Yu', ''], dtype=object)]
|
16,527 |
0810.2170
|
Walter Potzel
|
W. Potzel
|
Recoilless Resonant Emission and Detection of Electron Antineutrinos
|
To appear in Journal of Physics: Conference Series; Proceedings of
Neutrino 2008, Christchurch, New Zealand
|
J.Phys.Conf.Ser.136:022010,2008
|
10.1088/1742-6596/136/2/022010
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recoilless resonant capture of monoenergetic electron antineutrinos
(Moessbauer antineutrinos) emitted in bound-state beta-decay in the system 3H -
3He is discussed. The recoilfree fraction including a possible phonon
excitation due to local lattice expansion and contraction at the time of the
nuclear transition, homogeneous and inhomogeneous line broadening, and the
relativistic second-order Doppler effect are considered. It is demonstrated
that homogeneous line broadening is essential due to stochastic magnetic
relaxation processes in a metallic lattice. Inhomogeneous line broadening plays
an equally important role. An essential issue which has been overlooked up to
now, is an energy shift of the resonance line due to the direct influence of
the binding energies of the 3H and 3He atoms in the lattice on the energy of
the electron antineutrinos. This energy shift as well as the second-order
Doppler shift exhibit variations in a non-perfect (inhomogeneous) lattice and
may seriously jeopardize the observation of Moessbauer antineutrinos. If
successful in spite of these enormous difficulties, Moessbauer antineutrino
experiments could be used to gain new and deep insights into the nature of
neutrino oscillations, determine the neutrino mass hierarchy as well as up to
now unknown oscillation parameters, search for sterile neutrinos, and measure
the gravitational redshift of electron antineutrinos in the field of the Earth.
|
[{'version': 'v1', 'created': 'Mon, 13 Oct 2008 08:29:16 GMT'}]
|
2008-12-18
|
[array(['Potzel', 'W.', ''], dtype=object)]
|
16,528 |
2004.05340
|
Cheng Wang
|
Cheng Wang, Kang Wei, Lingjun Kong, Long Shi, Zhen Mei, Jun Li, and
Kui Cai
|
DNN-aided Read-voltage Threshold Optimization for MLC Flash Memory with
Finite Block Length
| null | null | null | null |
cs.IT cs.LG math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The error correcting performance of multi-level-cell (MLC) NAND flash memory
is closely related to the block length of error correcting codes (ECCs) and
log-likelihood-ratios (LLRs) of the read-voltage thresholds. Driven by this
issue, this paper optimizes the read-voltage thresholds for MLC flash memory to
improve the decoding performance of ECCs with finite block length. First,
through the analysis of channel coding rate (CCR) and decoding error
probability under finite block length, we formulate the optimization problem of
read-voltage thresholds to minimize the maximum decoding error probability.
Second, we develop a cross iterative search (CIS) algorithm to optimize
read-voltage thresholds under the perfect knowledge of flash memory channel.
However, it is challenging to analytically characterize the voltage
distribution under the effect of data retention noise (DRN), since the data
retention time (DRT) is hard to be recorded for flash memory in reality. To
address this problem, we develop a deep neural network (DNN) aided optimization
strategy to optimize the read-voltage thresholds, where a multi-layer
perception (MLP) network is employed to learn the relationship between voltage
distribution and read-voltage thresholds. Simulation results show that,
compared with the existing schemes, the proposed DNN-aided read-voltage
threshold optimization strategy with a well-designed LDPC code can not only
improve the program-and-erase (PE) endurance but also reduce the read latency.
|
[{'version': 'v1', 'created': 'Sat, 11 Apr 2020 09:03:50 GMT'}]
|
2020-04-14
|
[array(['Wang', 'Cheng', ''], dtype=object)
array(['Wei', 'Kang', ''], dtype=object)
array(['Kong', 'Lingjun', ''], dtype=object)
array(['Shi', 'Long', ''], dtype=object)
array(['Mei', 'Zhen', ''], dtype=object)
array(['Li', 'Jun', ''], dtype=object)
array(['Cai', 'Kui', ''], dtype=object)]
|
16,529 |
1703.02674
|
Chengtao Li
|
Chengtao Li, Stefanie Jegelka and Suvrit Sra
|
Polynomial Time Algorithms for Dual Volume Sampling
| null | null | null | null |
stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study dual volume sampling, a method for selecting k columns from an n x m
short and wide matrix (n <= k <= m) such that the probability of selection is
proportional to the volume spanned by the rows of the induced submatrix. This
method was proposed by Avron and Boutsidis (2013), who showed it to be a
promising method for column subset selection and its multiple applications.
However, its wider adoption has been hampered by the lack of polynomial time
sampling algorithms. We remove this hindrance by developing an exact
(randomized) polynomial time sampling algorithm as well as its derandomization.
Thereafter, we study dual volume sampling via the theory of real stable
polynomials and prove that its distribution satisfies the "Strong Rayleigh"
property. This result has numerous consequences, including a provably
fast-mixing Markov chain sampler that makes dual volume sampling much more
attractive to practitioners. This sampler is closely related to classical
algorithms for popular experimental design methods that are to date lacking
theoretical analysis but are known to empirically work well.
|
[{'version': 'v1', 'created': 'Wed, 8 Mar 2017 02:22:30 GMT'}
{'version': 'v2', 'created': 'Tue, 23 May 2017 04:07:18 GMT'}
{'version': 'v3', 'created': 'Thu, 16 Nov 2017 00:58:36 GMT'}]
|
2017-11-17
|
[array(['Li', 'Chengtao', ''], dtype=object)
array(['Jegelka', 'Stefanie', ''], dtype=object)
array(['Sra', 'Suvrit', ''], dtype=object)]
|
16,530 |
1611.08154
|
Byungjoo Lee
|
Byungjoo Lee, Mathieu Nancel, Sunjun Kim, Antti Oulasvirta
|
AutoGain: Gain Function Adaptation with Submovement Efficiency
Optimization
|
12 pages, 12 figures
| null | null | null |
cs.HC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A well-designed control-to-display gain function can improve pointing
performance with indirect pointing devices like trackpads. However, the design
of gain functions is challenging and mostly based on trial and error. AutoGain
is a novel method to individualize a gain function for indirect pointing
devices in contexts where cursor trajectories can be tracked. It gradually
improves pointing efficiency by using a novel submovement-level
tracking+optimization technique that minimizes aiming error
(undershooting/overshooting) for each submovement. We first show that AutoGain
can produce, from scratch, gain functions with performance comparable to
commercial designs, in less than a half-hour of active use. Second, we
demonstrate AutoGain's applicability to emerging input devices (here, a Leap
Motion controller) with no reference gain functions. Third, a one-month
longitudinal study of normal computer use with AutoGain showed performance
improvements from participants' default functions.
|
[{'version': 'v1', 'created': 'Thu, 24 Nov 2016 11:36:32 GMT'}
{'version': 'v2', 'created': 'Fri, 10 Jan 2020 14:29:47 GMT'}]
|
2020-01-13
|
[array(['Lee', 'Byungjoo', ''], dtype=object)
array(['Nancel', 'Mathieu', ''], dtype=object)
array(['Kim', 'Sunjun', ''], dtype=object)
array(['Oulasvirta', 'Antti', ''], dtype=object)]
|
16,531 |
1301.7570
|
Stefano Finzi Vita
|
M. Falcone, S. Finzi Vita, T. Giorgi and R.G. Smits
|
A semi-Lagrangian scheme for the game $p$-Laplacian via $p$-averaging
|
34 pages, 3 figures. To appear on Applied Numerical Mathematics
| null |
10.1016/j.apnum.2012.11.006
| null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present and analyze an approximation scheme for the two-dimensional game
$p$-Laplacian in the framework of viscosity solutions. The approximation is
based on a semi-Lagrangian scheme which exploits the idea of $p$-averages. We
study the properties of the scheme and prove that it converges, in particular
cases, to the viscosity solution of the game $p$-Laplacian. We also present a
numerical implementation of the scheme for different values of $p$; the
numerical tests show that the scheme is accurate.
|
[{'version': 'v1', 'created': 'Thu, 31 Jan 2013 10:10:34 GMT'}]
|
2013-02-01
|
[array(['Falcone', 'M.', ''], dtype=object)
array(['Vita', 'S. Finzi', ''], dtype=object)
array(['Giorgi', 'T.', ''], dtype=object)
array(['Smits', 'R. G.', ''], dtype=object)]
|
16,532 |
astro-ph/9604180
|
Alexander Kashlinsky
|
A. Kashlinsky, J.C. Mather, S. Odenwald, and M.G. Hauser
|
Clustering of DIRBE Light and IR Background
|
7 pages postcript, talk at "Unveiling the cosmic infrared background"
workshop, College Park, MD
| null |
10.1063/1.49244
| null |
astro-ph
| null |
We outline a new method for estimating the cosmic infrared background using
the spatial and spectral correlation properties of infrared maps. The cosmic
infrared background from galaxies should have a minimum fluctuation of the
order of 10\% on angular scales of the order of 1\deg. We show that a linear
combination of maps at different wavelengths can greatly reduce the
fluctuations produced by foreground stars, while not eliminating the
fluctuations of the background from high redshift galaxies. The method is
potentially very powerful, especially at wavelengths where the foreground is
bright but smooth.
|
[{'version': 'v1', 'created': 'Tue, 30 Apr 1996 18:34:32 GMT'}]
|
2015-06-24
|
[array(['Kashlinsky', 'A.', ''], dtype=object)
array(['Mather', 'J. C.', ''], dtype=object)
array(['Odenwald', 'S.', ''], dtype=object)
array(['Hauser', 'M. G.', ''], dtype=object)]
|
16,533 |
math/0412107
|
Rolf Gohm
|
Rolf Gohm
|
Decompositions of Beurling Type for E_0-Semigroups
|
minor corrections, 10 pages
|
Banach Center Publications, Vol. 73, Institute of Mathematics,
Polish Academy of Sciences, Warzawa (2006), 167-176
| null | null |
math.OA math.FA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We define tensor product decompositions of $E_0$-semigroups with a structure
analogous to a classical theorem of Beurling. Such decompositions can be
characterized by adaptedness and exactness of unitary cocycles. For CCR-flows
we show that such cocycles are convergent.
|
[{'version': 'v1', 'created': 'Mon, 6 Dec 2004 09:44:36 GMT'}
{'version': 'v2', 'created': 'Thu, 26 Feb 2009 17:16:49 GMT'}]
|
2009-02-26
|
[array(['Gohm', 'Rolf', ''], dtype=object)]
|
16,534 |
2108.00269
|
Alexey Silantyev
|
A. Silantyev
|
Quantum Representation Theory and Manin matrices I: finite-dimensional
case
|
83 pages, some improvements
| null | null | null |
math.QA math-ph math.CT math.MP math.RT
|
http://creativecommons.org/licenses/by/4.0/
|
We construct Quantum Representation Theory which describes quantum analogue
of representations in frame of "non-commutative linear geometry" developed by
Manin. To do it we generalise the internal hom-functor to the case of
adjunction with a parameter and construct a general approach to representations
of a monoid in a symmetric monoidal category with a parameter subcategory.
Quantum Representation Theory is obtained by application of this approach to a
monoidal category of some class of graded algebras with Manin product, where
the parameter subcategory consists of connected finitely generated quadratic
algebras. We formulate this theory in the language of Manin matrices and obtain
quantum analogues of direct sum and tensor product of representations. Finally,
we give some examples of quantum representations.
|
[{'version': 'v1', 'created': 'Sat, 31 Jul 2021 15:45:22 GMT'}
{'version': 'v2', 'created': 'Fri, 24 Sep 2021 15:29:17 GMT'}
{'version': 'v3', 'created': 'Wed, 1 Jun 2022 19:09:53 GMT'}]
|
2022-06-03
|
[array(['Silantyev', 'A.', ''], dtype=object)]
|
16,535 |
hep-th/0402137
|
Hiroaki Nakajima
|
Takeo Inami and Hiroaki Nakajima
|
Supersymmetric CP^N Sigma Model on Noncommutative Superspace
|
11 pages, refernces added and very minor changes in a few line
|
Prog.Theor.Phys. 111 (2004) 961-966
|
10.1143/PTP.111.961
| null |
hep-th
| null |
We construct a closed form of the action of the supersymmetric $CP^N$ sigma
model on noncommutative superspace in four dimensions. We show that this model
has $\mathcal{N}={1/2}$ supersymmetry and that the transformation law is not
modified. The supersymmetric $CP^N$ sigma model on noncommutative superspace in
two dimensions is obtained by dimensional reducing the model in four
dimensions.
|
[{'version': 'v1', 'created': 'Wed, 18 Feb 2004 08:45:17 GMT'}
{'version': 'v2', 'created': 'Mon, 1 Mar 2004 08:11:28 GMT'}]
|
2009-11-10
|
[array(['Inami', 'Takeo', ''], dtype=object)
array(['Nakajima', 'Hiroaki', ''], dtype=object)]
|
16,536 |
1206.6949
|
Yong Tang
|
Yong Tang
|
Implications of LHC Searches for Massive Graviton
|
17 pages, 10 figures; References added; Accepted version by JHEP
|
JHEP 1208 (2012) 078
|
10.1007/JHEP08(2012)078
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
With the latest LHC available results, we consider the generic constraints on
massive graviton. Both dijet and dilepton resonance searches are used. The
limits on parameter space can be applied to many models. As an illustration, we
show the constraints for Randall-Sundrum (RS) model. Implications on massive
graviton and the coupling strength are discussed. For $k/M_{pl}=0.1$, $M_G<2.2$
TeV region is excluded at 95% confidence level. We also present some
interesting implications on the RS radion with respect to the 125 GeV excess at
the LHC. For $k/M_{pl}=0.1$, $\Lambda_\phi<13.8$ TeV is excluded where
$\Lambda_\phi$ is the scale to charactarize the interaction strengh of radion.
|
[{'version': 'v1', 'created': 'Fri, 29 Jun 2012 06:34:01 GMT'}
{'version': 'v2', 'created': 'Tue, 31 Jul 2012 01:37:09 GMT'}]
|
2012-08-21
|
[array(['Tang', 'Yong', ''], dtype=object)]
|
16,537 |
0808.3829
|
Junya Otsuki
|
Junya Otsuki, Hiroaki Kusunose and Yoshio Kuramoto
|
The Kondo Lattice Model in Infinite Dimensions I. Formalism
|
13 pages, 10 figures
|
J. Phys. Soc. Jpn. 78 (2009) 014702
|
10.1143/JPSJ.78.014702
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A Green-function formalism for the Kondo lattice model is presented, which is
designed to be combined with the dynamical mean-field theory. With use of
Wick's theorem only for conduction electrons, dynamical quantities are
represented in terms of the t-matrix and its two-particle generalizations. By
taking the high-frequency limit of the t-matrix with respect to a part of the
fermion frequencies, one obtains dynamical correlation functions of localized
moments. Explicit examples of calculational steps are provided with use of the
continuous-time quantum Monte Carlo method.
|
[{'version': 'v1', 'created': 'Thu, 28 Aug 2008 05:38:21 GMT'}]
|
2009-01-06
|
[array(['Otsuki', 'Junya', ''], dtype=object)
array(['Kusunose', 'Hiroaki', ''], dtype=object)
array(['Kuramoto', 'Yoshio', ''], dtype=object)]
|
16,538 |
1402.2814
|
Eric Voutier
|
Eric Voutier
|
Physics perspectives at JLab with a polarized positron beam
|
Proc. of MENU 2013, XIIIrd International Conference on Meson-Nucleon
Physics and the Structure of the Nucleon, Rome (Italy), September 30 -
October 4, 2013 (To appear in EPJ Web of Conferences)
| null |
10.1051/epjconf/20147308007
| null |
physics.acc-ph hep-ex nucl-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Polarized positron beams are in some respect mandatory complements to
polarized electron beams. The advent of the PEPPo concept for polarized
positron production opens the possibility for the developement at the Jefferson
Laboratory of a continuous polarized positron beam. The benefits of such a beam
for hadronic structure studies are discussed, together with the technical and
technological challenges to face.
|
[{'version': 'v1', 'created': 'Wed, 12 Feb 2014 13:42:25 GMT'}]
|
2015-06-18
|
[array(['Voutier', 'Eric', ''], dtype=object)]
|
16,539 |
2208.10350
|
Stanley Chan
|
Stanley H. Chan
|
What Does a One-Bit Quanta Image Sensor Offer?
| null |
IEEE Transactions on Computational Imaging 2022
| null | null |
eess.IV
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
The one-bit quanta image sensor (QIS) is a photon-counting device that
captures image intensities using binary bits. Assuming that the analog voltage
generated at the floating diffusion of the photodiode follows a
Poisson-Gaussian distribution, the sensor produces either a ``1'' if the
voltage is above a certain threshold or ``0'' if it is below the threshold. The
concept of this binary sensor has been proposed for more than a decade, and
physical devices have been built to realize the concept. However, what benefits
does a one-bit QIS offer compared to a conventional multi-bit CMOS image
sensor? Besides the known empirical results, are there theoretical proofs to
support these findings?
The goal of this paper is to provide new theoretical support from a signal
processing perspective. In particular, it is theoretically found that the
sensor can offer three benefits: (1) Low-light: One-bit QIS performs better at
low-light because it has a low read noise, and its one-bit quantization can
produce an error-free measurement. However, this requires the exposure time to
be appropriately configured. (2) Frame rate: One-bit sensors can operate at a
much higher speed because a response is generated as soon as a photon is
detected. However, in the presence of read noise, there exists an optimal frame
rate beyond which the performance will degrade. A Closed-form expression of the
optimal frame rate is derived. (3) Dynamic range: One-bit QIS offers a higher
dynamic range. The benefit is brought by two complementary characteristics of
the sensor: nonlinearity and exposure bracketing. The decoupling of the two
factors is theoretically proved, and closed-form expressions are derived.
|
[{'version': 'v1', 'created': 'Fri, 19 Aug 2022 03:44:20 GMT'}]
|
2022-08-23
|
[array(['Chan', 'Stanley H.', ''], dtype=object)]
|
16,540 |
2106.11454
|
Hang Ma
|
Hang Ma
|
A Competitive Analysis of Online Multi-Agent Path Finding
|
Published at ICAPS 2021
| null | null | null |
cs.AI cs.MA cs.RO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study online Multi-Agent Path Finding (MAPF), where new agents are
constantly revealed over time and all agents must find collision-free paths to
their given goal locations. We generalize existing complexity results of
(offline) MAPF to online MAPF. We classify online MAPF algorithms into
different categories based on (1) controllability (the set of agents that they
can plan paths for at each time) and (2) rationality (the quality of paths they
plan) and study the relationships between them. We perform a competitive
analysis for each category of online MAPF algorithms with respect to
commonly-used objective functions. We show that a naive algorithm that routes
newly-revealed agents one at a time in sequence achieves a competitive ratio
that is asymptotically bounded from both below and above by the number of
agents with respect to flowtime and makespan. We then show a counter-intuitive
result that, if rerouting of previously-revealed agents is not allowed, any
rational online MAPF algorithms, including ones that plan optimal paths for all
newly-revealed agents, have the same asymptotic competitive ratio as the naive
algorithm, even on 2D 4-neighbor grids. We also derive constant lower bounds on
the competitive ratio of any rational online MAPF algorithms that allow
rerouting. The results thus provide theoretical insights into the effectiveness
of using MAPF algorithms in an online setting for the first time.
|
[{'version': 'v1', 'created': 'Tue, 22 Jun 2021 00:05:29 GMT'}]
|
2021-06-23
|
[array(['Ma', 'Hang', ''], dtype=object)]
|
16,541 |
1510.08797
|
Bernd Sturmfels
|
Bo Lin, Bernd Sturmfels, Xiaoxian Tang and Ruriko Yoshida
|
Convexity in Tree Spaces
|
21 pages, 5 figures; Theorem 13 is now proved in all dimensions
|
SIAM Journal on Discrete Mathematics 31 (2017) 2015-2038
|
10.1137/16M1079841
| null |
math.MG cs.CG math.CO q-bio.PE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the geometry of metrics and convexity structures on the space of
phylogenetic trees, which is here realized as the tropical linear space of all
\ ultrametrics. The ${\rm CAT}(0)$-metric of Billera-Holmes-Vogtman arises from
the theory of orthant spaces. While its geodesics can be computed by the
Owen-Provan algorithm, geodesic triangles are complicated. We show that the
dimension of such a triangle can be arbitrarily high. Tropical convexity and
the tropical metric behave better. They exhibit properties desirable for
geometric statistics, such as geodesics of small depth.
|
[{'version': 'v1', 'created': 'Thu, 29 Oct 2015 17:46:55 GMT'}
{'version': 'v2', 'created': 'Tue, 17 Nov 2015 13:13:18 GMT'}
{'version': 'v3', 'created': 'Tue, 14 Jun 2016 10:34:14 GMT'}]
|
2018-02-19
|
[array(['Lin', 'Bo', ''], dtype=object)
array(['Sturmfels', 'Bernd', ''], dtype=object)
array(['Tang', 'Xiaoxian', ''], dtype=object)
array(['Yoshida', 'Ruriko', ''], dtype=object)]
|
16,542 |
hep-ph/9307301
| null |
Robert Garisto and John N. Ng
|
Supersymmetric $b \rightarrow s \gamma$ with Large Chargino
Contributions
|
TRI-PP-93-66. 12pp (Plain LATEX)+4 fig not incl. PostScript file of
figs available (~3MB), contact Corrie Kost [email protected]. Request hardcopy
or FAX of figures through [email protected]
|
Phys.Lett. B315 (1993) 372-378
|
10.1016/0370-2693(93)91627-Y
| null |
hep-ph
| null |
Supersymmetric (SUSY) theories are often thought to give large branching
ratios for $b \rightarrow s \gamma$ from charged Higgs loops. We show that in
many cases chargino loop contributions can cancel those of the Higgs, and SUSY
can give $B(b \rightarrow s \gamma)$ at or below the \SM\ prediction. We show
this occurs because the large stop mass splittings usually found in SUSY break
a GIM mechanism suppression. These effects are strongly enhanced by large
$\tan\beta$, so that $B(b \rightarrow s \gamma)$ is very sensitive to the value
of $\tan\beta$, contrary to what has been claimed. We also note that the
supergravity relation $B_0 = A_0-1$ is somewhat disfavored over the general
case.
|
[{'version': 'v1', 'created': 'Tue, 20 Jul 1993 00:58:35 GMT'}]
|
2009-10-22
|
[array(['Garisto', 'Robert', ''], dtype=object)
array(['Ng', 'John N.', ''], dtype=object)]
|
16,543 |
0903.2676
|
Radoslaw Smolec
|
W. A. Dziembowski and R. Smolec
|
Double-Overtone Cepheids in the Large Magellanic Cloud
|
14 pages, 6 figures, accepted for publication in Acta Astronomica
|
Acta Astron. 59 (2009) 19
| null | null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
One of the most interesting results from the OGLE-III study of the LMC
Cepheids is the large number of objects that pulsate simultaneously in the
first and second overtone (denoted 1O/2O). Double-mode Cepheids yield important
constraint on stellar evolution models. We show that great majority of the LMC
1O/2O Cepheids have masses M=3.0+/-0.5 Msun. According to current stellar
evolution calculations, these masses are lower than needed for the blue loop in
the helium burning phase to reach the instability strip. On the other hand, we
found most of these stars significantly overluminous if they are crossing the
instability before helium ignition. A possible solution of this discrepancy is
to allow for a large overshooting from the convective core in the main sequence
phase. We also discuss origin of double-mode pulsation. At the short period
range we find two types of resonances that are conducive to this form of
pulsation. However, at longer periods, it has a different (non-resonant)
origin.
|
[{'version': 'v1', 'created': 'Sun, 15 Mar 2009 23:10:44 GMT'}]
|
2009-04-16
|
[array(['Dziembowski', 'W. A.', ''], dtype=object)
array(['Smolec', 'R.', ''], dtype=object)]
|
16,544 |
1407.2110
|
William C Ray
|
William C. Ray, Samuel L. Wolock, Nicholas W Callahan, Min Dong, Q.
Quinn Li, Chun Liang, Thomas J Magliery and Christopher W. Bartlett
|
Addressing the unmet need for visualizing Conditional Random Fields in
Biological Data
|
BioVis 2014 conference
| null | null | null |
cs.GR q-bio.QM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Background: The biological world is replete with phenomena that appear to be
ideally modeled and analyzed by one archetypal statistical framework - the
Graphical Probabilistic Model (GPM). The structure of GPMs is a uniquely good
match for biological problems that range from aligning sequences to modeling
the genome-to-phenome relationship. The fundamental questions that GPMs address
involve making decisions based on a complex web of interacting factors.
Unfortunately, while GPMs ideally fit many questions in biology, they are not
an easy solution to apply. Building a GPM is not a simple task for an end user.
Moreover, applying GPMs is also impeded by the insidious fact that the complex
web of interacting factors inherent to a problem might be easy to define and
also intractable to compute upon. Discussion: We propose that the visualization
sciences can contribute to many domains of the bio-sciences, by developing
tools to address archetypal representation and user interaction issues in GPMs,
and in particular a variety of GPM called a Conditional Random Field(CRF). CRFs
bring additional power, and additional complexity, because the CRF dependency
network can be conditioned on the query data. Conclusions: In this manuscript
we examine the shared features of several biological problems that are amenable
to modeling with CRFs, highlight the challenges that existing visualization and
visual analytics paradigms induce for these data, and document an experimental
solution called StickWRLD which, while leaving room for improvement, has been
successfully applied in several biological research projects.
|
[{'version': 'v1', 'created': 'Tue, 8 Jul 2014 14:34:14 GMT'}]
|
2014-07-09
|
[array(['Ray', 'William C.', ''], dtype=object)
array(['Wolock', 'Samuel L.', ''], dtype=object)
array(['Callahan', 'Nicholas W', ''], dtype=object)
array(['Dong', 'Min', ''], dtype=object)
array(['Li', 'Q. Quinn', ''], dtype=object)
array(['Liang', 'Chun', ''], dtype=object)
array(['Magliery', 'Thomas J', ''], dtype=object)
array(['Bartlett', 'Christopher W.', ''], dtype=object)]
|
16,545 |
1311.2696
|
Zhe Wang
|
Zhe Wang, Alireza Marandi, Kai Wen, Robert L. Byer and Yoshihisa
Yamamoto
|
A Coherent Ising Machine Based On Degenerate Optical Parametric
Oscillators
|
18 pages, 6 figures
| null |
10.1103/PhysRevA.88.063853
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A degenerate optical parametric oscillator network is proposed to solve the
NP-hard problem of finding a ground state of the Ising model. The underlying
operating mechanism originates from the bistable output phase of each
oscillator and the inherent preference of the network in selecting oscillation
modes with the minimum photon decay rate. Computational experiments are
performed on all instances reducible to the NP-hard MAX-CUT problems on cubic
graphs of order up to 20. The numerical results reasonably suggest the
effectiveness of the proposed network.
|
[{'version': 'v1', 'created': 'Tue, 12 Nov 2013 07:06:25 GMT'}]
|
2015-06-17
|
[array(['Wang', 'Zhe', ''], dtype=object)
array(['Marandi', 'Alireza', ''], dtype=object)
array(['Wen', 'Kai', ''], dtype=object)
array(['Byer', 'Robert L.', ''], dtype=object)
array(['Yamamoto', 'Yoshihisa', ''], dtype=object)]
|
16,546 |
1206.6290
|
Christian Wuthrich
|
Nick Huggett and Christian Wuthrich
|
Emergent spacetime and empirical (in)coherence
|
18 pages, 1 figure, accepted for publication in Studies in History
and Philosophy of Modern Physics
|
Studies in the History and Philosophy of Modern Physics 44 (2013):
276-285
|
10.1016/j.shpsb.2012.11.003
| null |
physics.hist-ph gr-qc quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Numerous approaches to a quantum theory of gravity posit fundamental
ontologies that exclude spacetime, either partially or wholly. This situation
raises deep questions about how such theories could relate to the empirical
realm, since arguably only entities localized in spacetime can ever be
observed. Are such entities even possible in a theory without fundamental
spacetime? How might they be derived, formally speaking? Moreover, since by
assumption the fundamental entities can't be smaller than the derived (since
relative size is a spatiotemporal notion) and so can't 'compose' them in any
ordinary sense, would a formal derivation actually show the physical reality of
localized entities? We address these questions via a survey of a range of
theories of quantum gravity, and generally sketch how they may be answered
positively.
|
[{'version': 'v1', 'created': 'Tue, 26 Jun 2012 19:44:19 GMT'}
{'version': 'v2', 'created': 'Wed, 14 Nov 2012 01:16:25 GMT'}]
|
2013-08-13
|
[array(['Huggett', 'Nick', ''], dtype=object)
array(['Wuthrich', 'Christian', ''], dtype=object)]
|
16,547 |
2111.02394
|
Zhe Chen
|
Zhe Chen, Jiahao Wang, Wenhai Wang, Guo Chen, Enze Xie, Ping Luo, Tong
Lu
|
FAST: Faster Arbitrarily-Shaped Text Detector with Minimalist Kernel
Representation
| null | null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose an accurate and efficient scene text detection framework, termed
FAST (i.e., faster arbitrarily-shaped text detector). Different from recent
advanced text detectors that used complicated post-processing and hand-crafted
network architectures, resulting in low inference speed, FAST has two new
designs. (1) We design a minimalist kernel representation (only has 1-channel
output) to model text with arbitrary shape, as well as a GPU-parallel
post-processing to efficiently assemble text lines with a negligible time
overhead. (2) We search the network architecture tailored for text detection,
leading to more powerful features than most networks that are searched for
image classification. Benefiting from these two designs, FAST achieves an
excellent trade-off between accuracy and efficiency on several challenging
datasets, including Total Text, CTW1500, ICDAR 2015, and MSRA-TD500. For
example, FAST-T yields 81.6% F-measure at 152 FPS on Total-Text, outperforming
the previous fastest method by 1.7 points and 70 FPS in terms of accuracy and
speed. With TensorRT optimization, the inference speed can be further
accelerated to over 600 FPS. Code and models will be released at
https://github.com/czczup/FAST.
|
[{'version': 'v1', 'created': 'Wed, 3 Nov 2021 17:58:47 GMT'}
{'version': 'v2', 'created': 'Wed, 11 Jan 2023 14:04:01 GMT'}]
|
2023-01-12
|
[array(['Chen', 'Zhe', ''], dtype=object)
array(['Wang', 'Jiahao', ''], dtype=object)
array(['Wang', 'Wenhai', ''], dtype=object)
array(['Chen', 'Guo', ''], dtype=object)
array(['Xie', 'Enze', ''], dtype=object)
array(['Luo', 'Ping', ''], dtype=object)
array(['Lu', 'Tong', ''], dtype=object)]
|
16,548 |
astro-ph/0311523
|
Zhang Fan
|
Fan Zhang, X.-D. Li, Z.-R. Wang
|
Where Are Be/black-hole Binaries?
|
14 pages,3 figures, ApJ accepted
|
Astrophys.J. 603 (2004) 663-668
|
10.1086/381540
| null |
astro-ph
| null |
We apply the tidal truncation model proposed by Negueruela & Okazaki(2001) to
arbitrary Be/compact star binaries to study the truncation efficiency
dependance on the binary parameters. We find that the viscous decretion disks
around the Be stars could be truncated very effectively in narrow systems.
Combining this with the population synthesis results of Podsiadlowski,
Rappaport and Han (2003) that binary black holes are most likely to be born in
systems with orbital periods less than about 30 days, we suggest that most of
the Be/black-hole binaries may be transient systems with very long quiescent
states. This could explain the lack of observed Be/black-hole X-ray binaries.
We also discuss the evolution of the Be/black-hole binaries and their possible
observational features.
|
[{'version': 'v1', 'created': 'Sun, 23 Nov 2003 11:48:11 GMT'}]
|
2009-11-10
|
[array(['Zhang', 'Fan', ''], dtype=object)
array(['Li', 'X. -D.', ''], dtype=object)
array(['Wang', 'Z. -R.', ''], dtype=object)]
|
16,549 |
1812.09779
|
Carlos Hervias-Caimapo
|
Carlos Herv\'ias-Caimapo, Manuel Merello, Leonardo Bronfman, Lars
\r{A}ke-Nyman, Guido Garay, Nadia Lo, Neal J. Evans II, Cristian
L\'opez-Calder\'on and Edgar Mendoza
|
ALMA Observations of the massive molecular outflow G331.512-0.103 II:
physical properties, kinematics, and geometry modeling
|
19 pages, 17 figures, 2 appendices. Accepted for publication by The
Astrophysical Journal
| null |
10.3847/1538-4357/aaf9ac
| null |
astro-ph.GA astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present observations and analysis of the massive molecular outflow
G331.512-0.103, obtained with ALMA band 7, continuing the work from Merello et
al. (2013). Several lines were identified in the observed bandwidth, consisting
of two groups: lines with narrow profiles, tracing the emission from the core
ambient medium; and lines with broad velocity wings, tracing the outflow and
shocked gas emission. The physical and chemical conditions, such as density,
temperature, and fractional abundances are calculated. The ambient medium, or
core, has a mean density of $\sim 5\times 10^6$ cm$^{-3}$ and a temperature of
$\sim 70$ K. The SiO and SO$_2$ emission trace the very dense and hot part of
the shocked outflow, with values of $n_{\rm H_2}\sim10^9$ cm$^{-3}$ and $T \sim
160-200$ K. The interpretation of the molecular emission suggests an expanding
cavity geometry powered by stellar winds from a new-born UCHII region,
alongside a massive and high-velocity molecular outflow. This scenario, along
with the estimated physical conditions, is modeled using the 3D geometry
radiative transfer code MOLLIE for the SiO(J$=8-7$) molecular line. The main
features of the outflow and the expanding shell are reproduced by the model.
|
[{'version': 'v1', 'created': 'Sun, 23 Dec 2018 21:30:08 GMT'}]
|
2019-03-06
|
[array(['Hervías-Caimapo', 'Carlos', ''], dtype=object)
array(['Merello', 'Manuel', ''], dtype=object)
array(['Bronfman', 'Leonardo', ''], dtype=object)
array(['Åke-Nyman', 'Lars', ''], dtype=object)
array(['Garay', 'Guido', ''], dtype=object)
array(['Lo', 'Nadia', ''], dtype=object)
array(['Evans', 'Neal J.', 'II'], dtype=object)
array(['López-Calderón', 'Cristian', ''], dtype=object)
array(['Mendoza', 'Edgar', ''], dtype=object)]
|
16,550 |
hep-lat/9801021
|
Ferenc Niedermayer
|
Peter Hasenfratz, Victor Laliena and Ferenc Niedermayer
|
The index theorem in QCD with a finite cut-off
|
9 pages, 1 figure. Minor clarifying changes are made and new
references added
|
Phys.Lett. B427 (1998) 125-131
|
10.1016/S0370-2693(98)00315-3
|
BUTP-98/1
|
hep-lat hep-th
| null |
The fixed point Dirac operator on the lattice has exact chiral zero modes on
topologically non-trivial gauge field configurations independently whether
these configurations are smooth, or coarse. The relation $n_L-n_R = Q^{FP}$,
where $n_L$ $(n_R)$ is the number of left (right)-handed zero modes and
$Q^{FP}$ is the fixed point topological charge holds not only in the continuum
limit, but also at finite cut-off values. The fixed point action, which is
determined by classical equations, is local, has no doublers and complies with
the no-go theorems by being chirally non-symmetric. The index theorem is
reproduced exactly, nevertheless. In addition, the fixed point Dirac operator
has no small real eigenvalues except those at zero, i.e. there are no
'exceptional configurations'.
|
[{'version': 'v1', 'created': 'Mon, 19 Jan 1998 12:09:27 GMT'}
{'version': 'v2', 'created': 'Tue, 3 Feb 1998 08:48:34 GMT'}]
|
2009-10-31
|
[array(['Hasenfratz', 'Peter', ''], dtype=object)
array(['Laliena', 'Victor', ''], dtype=object)
array(['Niedermayer', 'Ferenc', ''], dtype=object)]
|
16,551 |
0908.3300
|
Jan Govaerts
|
Joseph Ben Geloun (1,3,4), Jan Govaerts (2,3) and Frederik G. Scholtz
(1) ((1) NITheP, South Africa, (2) CP3, UCL, Louvain-la-Neuve, Belgium, (3)
ICMPA-UNESCO, Cotonou, Rep. Benin, (4) Univ. Cheikh Anta Diop, Senegal)
|
The N=1 Supersymmetric Landau Problem and its Supersymmetric Landau
Level Projections: the N=1 Supersymmetric Moyal-Voros Superplane
| null |
J.Phys.A42:495203,2009
|
10.1088/1751-8113/42/49/495203
|
CP3-09-38
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The N=1 supersymmetric invariant Landau problem is constructed and solved. By
considering Landau level projections remaining non trivial under N=1
supersymmetry transformations, the algebraic structures of the N=1
supersymmetric covariant non(anti)commutative superplane analogue of the
ordinary N=0 noncommutative Moyal-Voros plane are identified.
|
[{'version': 'v1', 'created': 'Sun, 23 Aug 2009 13:10:55 GMT'}]
|
2014-11-20
|
[array(['Geloun', 'Joseph Ben', ''], dtype=object)
array(['Govaerts', 'Jan', ''], dtype=object)
array(['Scholtz', 'Frederik G.', ''], dtype=object)]
|
16,552 |
astro-ph/0203309
|
John F. Hawley
|
John F. Hawley and Steven A. Balbus (University of Virginia)
|
The Dynamical Structure of Nonradiative Black Hole Accretion Flows
|
Accepted for Publication in the Astrophysical Journal. For a web
version see http://www.astro.virginia.edu/VITA/papers/nraf2/
| null |
10.1086/340765
| null |
astro-ph
| null |
We analyze three-dimensional magnetohydrodynamic (MHD) simulations of a
nonradiative accretion flow around a black hole using a pseudo-Newtonian
potential. The flow originates from a torus initially centered at 100
gravitational (Schwarzschild) radii. Accretion is driven by turbulent stresses
generated self-consistently by the magnetorotational instability. The resulting
flow has three well-defined dynamical components: a hot, thick,
rotationally-dominated Keplerian disk; a surrounding magnetized corona with
vigorous circulation and outflow; and a magnetically-confined jet along the
centrifugal funnel wall. Inside of 10 gravitational radii, the disk becomes
very hot, more toroidal, and highly intermittent. These results contrast
sharply with quasi-spherical, self-similar viscous models. There are no
significant dynamical differences between simulations that include resistive
heating and those that do not. We conclude by deducing some simple radiative
properties of our solutions, and apply the results to the accretion-powered
Galactic center source Sgr A*.
|
[{'version': 'v1', 'created': 'Tue, 19 Mar 2002 18:30:12 GMT'}]
|
2009-11-07
|
[array(['Hawley', 'John F.', '', 'University of Virginia'], dtype=object)
array(['Balbus', 'Steven A.', '', 'University of Virginia'], dtype=object)]
|
16,553 |
cs/9605103
| null |
L. P. Kaelbling, M. L. Littman, A. W. Moore
|
Reinforcement Learning: A Survey
|
See http://www.jair.org/ for any accompanying files
|
Journal of Artificial Intelligence Research, Vol 4, (1996),
237-285
| null | null |
cs.AI
| null |
This paper surveys the field of reinforcement learning from a
computer-science perspective. It is written to be accessible to researchers
familiar with machine learning. Both the historical basis of the field and a
broad selection of current work are summarized. Reinforcement learning is the
problem faced by an agent that learns behavior through trial-and-error
interactions with a dynamic environment. The work described here has a
resemblance to work in psychology, but differs considerably in the details and
in the use of the word ``reinforcement.'' The paper discusses central issues of
reinforcement learning, including trading off exploration and exploitation,
establishing the foundations of the field via Markov decision theory, learning
from delayed reinforcement, constructing empirical models to accelerate
learning, making use of generalization and hierarchy, and coping with hidden
state. It concludes with a survey of some implemented systems and an assessment
of the practical utility of current methods for reinforcement learning.
|
[{'version': 'v1', 'created': 'Wed, 1 May 1996 00:00:00 GMT'}]
|
2014-11-17
|
[array(['Kaelbling', 'L. P.', ''], dtype=object)
array(['Littman', 'M. L.', ''], dtype=object)
array(['Moore', 'A. W.', ''], dtype=object)]
|
16,554 |
1101.1957
|
Jeremy Murphy
|
Jeremy D. Murphy, Karl Gebhardt and Joshua J. Adams (University of
Texas, Austin)
|
Galaxy Kinematics with VIRUS-P: The Dark Matter Halo of M87
|
15 figures, 29 pages, Accepted for publication in ApJ
| null |
10.1088/0004-637X/729/2/129
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present 2-D stellar kinematics of M87 out to R = 238" taken with the
integral field spectrograph VIRUS-P. We run a large set of axisymmetric,
orbit-based dynamical models and find clear evidence for a massive dark matter
halo. While a logarithmic parameterization for the dark matter halo is
preferred, we do not constrain the dark matter scale radius for an NFW profile
and therefore cannot rule it out. Our best-fit logarithmic models return an
enclosed dark matter fraction of 17.2 +/- 5.0 % within one effective radius
(R_e ~ 100"), rising to 49.4 (+7.2,-8.8) % within 2 R_e. Existing SAURON data
(R < 13"), and globular cluster kinematic data covering 145" < R < 540"
complete the kinematic coverage to R = 47 kpc. At this radial distance the
logarithmic dark halo comprises 85.3 (+2.5,-2.4) % of the total enclosed mass
of 5.7^(+1.3)_(-0.9) X 10^(12) M_sun making M87 one of the most massive
galaxies in the local universe. Our best-fit logarithmic dynamical models
return a stellar mass-to-light ratio of 9.1^(+0.2)_(-0.2) (V-band), a dark halo
circular velocity of 800^(+75)_(-25) kms, and a dark halo scale radius of
36^(+7)_(-3) kpc. The stellar M/L, assuming an NFW dark halo, is well
constrained to 8.20^(+0.05)_(-0.10) (V-band). The stars in M87 are found to be
radially anisotropic out to R ~ 0.5 R_e then isotropic or slightly tangentially
anisotropic to our last stellar data point at R = 2.4 R_e where the anisotropy
of the stars and globular clusters are in excellent agreement. The globular
clusters then become radially anisotropic in the last two modeling bins at R =
3.4 R_e and R = 4.8 R_e. As one of the most massive galaxies in the local
universe, constraints on both the mass distribution of M87 and anisotropy of
its kinematic components strongly informs our theories of early-type galaxy
formation and evolution in dense environments.
|
[{'version': 'v1', 'created': 'Mon, 10 Jan 2011 21:00:05 GMT'}]
|
2015-05-27
|
[array(['Murphy', 'Jeremy D.', '', 'University of\n Texas, Austin'],
dtype=object)
array(['Gebhardt', 'Karl', '', 'University of\n Texas, Austin'],
dtype=object)
array(['Adams', 'Joshua J.', '', 'University of\n Texas, Austin'],
dtype=object) ]
|
16,555 |
1410.5589
|
Shradha Mishra
|
Shradha Mishra, Sanjay Puri and Sriram Ramaswamy
|
Aspects of the density field in an active nematic
|
22 pages, 13 figures
|
Phil. Trans. R. Soc. A 372, 20130364 (2014)
|
10.1098/rsta.2013.0364
| null |
cond-mat.soft cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Active nematics are conceptually the simplest orientationally ordered phase
of self-driven particles, but have proved to be a perennial source of
surprises. We show here through numerical solution of coarse-grained equations
for order parameter and density that the growth of the active nematic phase
from the isotropic phase is necessarily accompanied by a clumping of the
density. The growth kinetics of the density domains is shown to be faster than
the 1/3-law expected for variables governed by a conservation law. Other
results presented include the suppression of density fluctuations in the
stationary ordered nematic by the imposition of an orienting field. We close by
posing some open questions.
|
[{'version': 'v1', 'created': 'Tue, 21 Oct 2014 09:34:58 GMT'}]
|
2014-10-22
|
[array(['Mishra', 'Shradha', ''], dtype=object)
array(['Puri', 'Sanjay', ''], dtype=object)
array(['Ramaswamy', 'Sriram', ''], dtype=object)]
|
16,556 |
1904.03211
|
Rana Ezzeddine
|
Rana Ezzeddine, Anna Frebel, Ian U. Roederer, Nozomu Tominaga, Jason
Tumlinson, Miho Ishigaki, Ken'ichi Nomoto, Vinicius M. Placco and Wako Aoki
|
Evidence for an aspherical Population III supernova explosion inferred
from the hyper metal-poor star HE1327-2326
|
11 pages, 4 figures, accepted for publication in the Astrophysical
Journal
| null |
10.3847/1538-4357/ab14e7
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present observational evidence that an aspherical supernova explosion
could have occurred in the First stars in the early universe. Our results are
based on the First determination of a Zn abundance in a Hubble Space
Telescope/Cosmic Origins Spectrograph high-resolution UV spectrum of a hyper
metal-poor (HMP) star, HE1327-2326, with [Fe/H](NLTE) = -5.2. We determine
[Zn/Fe] = 0.80$\pm$0.25 from a UV Zn I line at 2138 detected at $3.4\sigma$.
Yields of a 25M$_{\odot}$ aspherical supernova model with artificially modified
densities exploding with E = 5x10$^{51}$ ergs best match the entire abundance
pattern of HE1327-2326. Such high-entropy hypernova explosions are expected to
produce bipolar outfows which could facilitate the external enrichment of small
neighboring galaxies. This has already been predicted by theoretical studies of
the earliest star forming minihalos. Such a scenario would have significant
implications for the chemical enrichment across the early universe as HMP
Carbon Enhanced Metal-Poor (CEMP) stars such as HE1327-2326 might have formed
in such externally enriched environments.
|
[{'version': 'v1', 'created': 'Fri, 5 Apr 2019 18:08:27 GMT'}]
|
2019-05-13
|
[array(['Ezzeddine', 'Rana', ''], dtype=object)
array(['Frebel', 'Anna', ''], dtype=object)
array(['Roederer', 'Ian U.', ''], dtype=object)
array(['Tominaga', 'Nozomu', ''], dtype=object)
array(['Tumlinson', 'Jason', ''], dtype=object)
array(['Ishigaki', 'Miho', ''], dtype=object)
array(['Nomoto', "Ken'ichi", ''], dtype=object)
array(['Placco', 'Vinicius M.', ''], dtype=object)
array(['Aoki', 'Wako', ''], dtype=object)]
|
16,557 |
2007.12592
|
Donghoon Jang
|
Donghoon Jang, Susan Tolman
|
Non-Hamiltonian actions with fewer isolated fixed points
| null | null |
10.1093/imrn/rnac033
| null |
math.SG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In an earlier paper, the second author resolved a question of McDuff by
constructing a non-Hamiltonian symplectic circle action on a closed, connected
six-dimensional symplectic manifold with exactly 32 fixed points. In this
paper, we improve on this example by reducing the number of fixed points. More
concretely, we construct a non-Hamiltonian symplectic circle action on a
closed, connected six-dimensional symplectic manifold with exactly $2k$ fixed
points for any $k \geq 5$.
|
[{'version': 'v1', 'created': 'Fri, 24 Jul 2020 15:49:11 GMT'}]
|
2022-03-08
|
[array(['Jang', 'Donghoon', ''], dtype=object)
array(['Tolman', 'Susan', ''], dtype=object)]
|
16,558 |
1601.05646
|
Antonino Francesco Lanza
|
A. F. Lanza, P. Molaro, L. Monaco, R. D. Haywood
|
Long-term radial-velocity variations of the Sun as a star: The HARPS
view
|
11 pages, 7 figures, 2 tables, 1 Appendix; accepted by Astronomy and
Astrophysics
|
A&A 587, A103 (2016)
|
10.1051/0004-6361/201527379
| null |
astro-ph.EP astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Stellar radial velocities play a fundamental role in the discovery of
extrasolar planets and the measurement of their physical parameters as well as
in the study of stellar physical properties. We investigate the impact of the
solar activity on the radial velocity of the Sun using the HARPS spectrograph
to obtain measurements that can be directly compared with those acquired in the
extrasolar planet search programs. We use the Moon, the Galilean satellites,
and several asteroids as reflectors to measure the radial velocity of the Sun
as a star and correlate it with disc-integrated chromospheric and magnetic
indexes of solar activity that are similar to stellar activity indexes. We
discuss in detail the systematic effects that affect our measurements and the
methods to account for them. We find that the radial velocity of the Sun as a
star is positively correlated with the level of its chromospheric activity at
about 95 percent significance level. The amplitude of the long-term variation
measured in the 2006-2014 period is 4.98 \pm 1.44 m/s, in good agreement with
model predictions. The standard deviation of the residuals obtained by
subtracting a linear best fit is 2.82 m/s and is due to the rotation of the
reflecting bodies and the intrinsic variability of the Sun on timescales
shorter than the activity cycle. A correlation with a lower significance is
detected between the radial velocity and the mean absolute value of the
line-of-sight photospheric magnetic field flux density. Our results confirm
similar correlations found in other late-type main-sequence stars and provide
support to the predictions of radial velocity variations induced by stellar
activity based on current models.
|
[{'version': 'v1', 'created': 'Thu, 21 Jan 2016 14:15:23 GMT'}
{'version': 'v2', 'created': 'Fri, 22 Jan 2016 07:24:27 GMT'}]
|
2016-03-02
|
[array(['Lanza', 'A. F.', ''], dtype=object)
array(['Molaro', 'P.', ''], dtype=object)
array(['Monaco', 'L.', ''], dtype=object)
array(['Haywood', 'R. D.', ''], dtype=object)]
|
16,559 |
1508.06927
|
Yunpeng Wang
|
Long Cheng, Yunpeng Wang, Wei Ren, Zeng-Guang Hou and Min Tan
|
On Convergence Rate of Leader-Following Consensus of Linear Multi-Agent
Systems with Communication Noises
| null | null | null | null |
cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This note further studies the previously proposed consensus protocol for
linear multi-agent systems with communication noises in [15], [16]. Each agent
is allowed to have its own time-varying gain to attenuate the effect of
communication noises. Therefore, the common assumption in most references that
all agents have the same noise-attenuation gain is not necessary. It has been
proved that if all noise-attenuation gains are infinitesimal of the same order,
then the mean square leader-following consensus can be reached. Furthermore,
the convergence rate of the multi-agent system has been investigated. If the
noise-attenuation gains belong to a class of functions which are bounded above
and below by $t^{-\beta}$ $(\beta\in(0,1))$ asymptotically, then the states of
all follower agents are convergent in mean square to the leader's state with
the rate characterized by a function bounded above by $t^{-\beta}$
asymptotically.
|
[{'version': 'v1', 'created': 'Thu, 27 Aug 2015 16:28:35 GMT'}]
|
2015-08-28
|
[array(['Cheng', 'Long', ''], dtype=object)
array(['Wang', 'Yunpeng', ''], dtype=object)
array(['Ren', 'Wei', ''], dtype=object)
array(['Hou', 'Zeng-Guang', ''], dtype=object)
array(['Tan', 'Min', ''], dtype=object)]
|
16,560 |
2101.12416
|
Shane Barratt
|
Shane Barratt and Stephen Boyd
|
Covariance Prediction via Convex Optimization
| null | null | null | null |
stat.ML cs.AI cs.LG math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the problem of predicting the covariance of a zero mean Gaussian
vector, based on another feature vector. We describe a covariance predictor
that has the form of a generalized linear model, i.e., an affine function of
the features followed by an inverse link function that maps vectors to
symmetric positive definite matrices. The log-likelihood is a concave function
of the predictor parameters, so fitting the predictor involves convex
optimization. Such predictors can be combined with others, or recursively
applied to improve performance.
|
[{'version': 'v1', 'created': 'Fri, 29 Jan 2021 06:06:58 GMT'}]
|
2021-02-01
|
[array(['Barratt', 'Shane', ''], dtype=object)
array(['Boyd', 'Stephen', ''], dtype=object)]
|
16,561 |
2104.06531
|
Eric Hallman
|
Eric Hallman
|
A Refined Probabilistic Error Bound for Sums
| null | null | null | null |
math.NA cs.NA
|
http://creativecommons.org/licenses/by/4.0/
|
This paper considers a probabilistic model for floating-point computation in
which the roundoff errors are represented by bounded random variables with mean
zero. Using this model, a probabilistic bound is derived for the forward error
of the computed sum of n real numbers. This work improves upon existing
probabilistic bounds by holding to all orders, and as a result provides
informative bounds for larger problem sizes.
|
[{'version': 'v1', 'created': 'Tue, 13 Apr 2021 22:19:55 GMT'}]
|
2021-04-15
|
[array(['Hallman', 'Eric', ''], dtype=object)]
|
16,562 |
cond-mat/0501663
|
Patrick N. McGraw
|
Patrick N. McGraw and Michael Menzinger
|
Clustering and Synchronization of Oscillator Networks
|
Submitted to Phys. Rev. E
| null |
10.1103/PhysRevE.72.015101
| null |
cond-mat.dis-nn
| null |
Using a recently described technique for manipulating the clustering
coefficient of a network without changing its degree distribution, we examine
the effect of clustering on the synchronization of phase oscillators on
networks with Poisson and scale-free degree distributions. For both types of
network, increased clustering hinders global synchronization as the network
splits into dynamical clusters that oscillate at different frequencies.
Surprisingly, in scale-free networks, clustering promotes the synchronization
of the most connected nodes (hubs) even though it inhibits global
synchronization. As a result, scale-free networks show an additional, advanced
transition instead of a single synchronization threshold. This cluster-enhanced
synchronization of hubs may be relevant to the brain with its scale-free and
highly clustered structure.
|
[{'version': 'v1', 'created': 'Thu, 27 Jan 2005 13:43:49 GMT'}
{'version': 'v2', 'created': 'Thu, 9 Jun 2005 20:35:11 GMT'}]
|
2009-11-11
|
[array(['McGraw', 'Patrick N.', ''], dtype=object)
array(['Menzinger', 'Michael', ''], dtype=object)]
|
16,563 |
2010.15627
|
Ricardo Dorda
|
R. Dorda and L. R. Patrick
|
Multiplicity among the cool supergiants in the Magellanic Clouds
|
Accepted for publication in the Monthly Notices of the the Royal
Astronomical Society
| null |
10.1093/mnras/stab303
| null |
astro-ph.SR astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The characterisation of the multiplicity of high-mass stars is of fundamental
importance to understand their evolution, the diversity of observed
core-collapse supernovae and the formation of gravitational wave progenitor
systems. Despite that, until recently, one of the final phases of massive star
evolution -- the cool supergiant phase -- has received comparatively little
attention. In this study we aim to explore the multiplicity among the cool
supergiants (CSGs) in the Large and Small Magellanic Clouds (LMC and SMC,
respectively). To do this we compile extensive archival radial velocity (RV)
measurements for over 1000 CSGs from the LMC and SMC, spanning a baseline of
over 40 years. By statistically correcting the RV measurements of each stellar
catalogue to the Gaia DR2 reference frame we are able to effectively compare
these diverse observations. We identify 45 CSGs where RV variations cannot be
explained through intrinsic variability, and are hence considered binary
systems. We obtain a minimum binary fraction of $15\pm4\%$ for the SMC and of
$14\pm5\%$ for the LMC. Combining these results, we determine a minimum binary
fraction of $15\pm3\%$ for CSGs. These results are in good agreement with
previous results which apply a correction to account for observational biases.
These results add strength to the hypothesis that the binary fraction of CSGs
is significantly lower than their main-sequence counterparts. Going forward, we
stress the need for long-baseline multi-epoch spectroscopic surveys to cover
the full parameter space of CSG binary systems.
|
[{'version': 'v1', 'created': 'Thu, 29 Oct 2020 14:16:48 GMT'}
{'version': 'v2', 'created': 'Mon, 1 Feb 2021 12:26:03 GMT'}]
|
2021-02-17
|
[array(['Dorda', 'R.', ''], dtype=object)
array(['Patrick', 'L. R.', ''], dtype=object)]
|
16,564 |
0905.3640
|
Mattheos Protopapas
|
Mattheos K. Protopapas, Elias B. Kosmatopoulos, Francesco Battaglia
|
Coevolutionary Genetic Algorithms for Establishing Nash Equilibrium in
Symmetric Cournot Games
|
18 pages, 4 figures
|
Advances in Decision Sciences, vol. 2010, Article ID 573107
|
10.1155/2010/573107
| null |
cs.GT cs.LG
|
http://creativecommons.org/licenses/by/3.0/
|
We use co-evolutionary genetic algorithms to model the players' learning
process in several Cournot models, and evaluate them in terms of their
convergence to the Nash Equilibrium. The "social-learning" versions of the two
co-evolutionary algorithms we introduce, establish Nash Equilibrium in those
models, in contrast to the "individual learning" versions which, as we see
here, do not imply the convergence of the players' strategies to the Nash
outcome. When players use "canonical co-evolutionary genetic algorithms" as
learning algorithms, the process of the game is an ergodic Markov Chain, and
therefore we analyze simulation results using both the relevant methodology and
more general statistical tests, to find that in the "social" case, states
leading to NE play are highly frequent at the stationary distribution of the
chain, in contrast to the "individual learning" case, when NE is not reached at
all in our simulations; to find that the expected Hamming distance of the
states at the limiting distribution from the "NE state" is significantly
smaller in the "social" than in the "individual learning case"; to estimate the
expected time that the "social" algorithms need to get to the "NE state" and
verify their robustness and finally to show that a large fraction of the games
played are indeed at the Nash Equilibrium.
|
[{'version': 'v1', 'created': 'Fri, 22 May 2009 19:07:21 GMT'}]
|
2010-05-13
|
[array(['Protopapas', 'Mattheos K.', ''], dtype=object)
array(['Kosmatopoulos', 'Elias B.', ''], dtype=object)
array(['Battaglia', 'Francesco', ''], dtype=object)]
|
16,565 |
2304.11952
|
Francois Durand
|
Emma Caizergues (LINCS), Fran\c{c}ois Durand (LINCS), Fabien Mathieu
(LINCS)
|
Sorting wild pigs
|
in French language, AlgoTel 2023 - 25{\`e}mes Rencontres Francophones
sur les Aspects Algorithmiques des T{\'e}l{\'e}communications, May 2023,
Cargese, France
| null | null | null |
cs.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Chjara, breeder in Carg{\`e}se, has n wild pigs. She would like to sort her
herd by weight to better meet the demands of her buyers. Each beast has a
distinct weight, alas unknown to Chjara. All she has at her disposal is a
Roberval scale, which allows her to compare two pigs only at the cost of an
acrobatic manoeuvre. The balance, quite old, can break at any time. Chjara
therefore wants to sort his herd in a minimum of weighings, but also to have a
good estimate of the result after each weighing.To help Chjara, we pose the
problem of finding a good anytime sorting algorithm, in the sense of Kendall's
tau distance between provisional result and perfectly sorted list, and we bring
the following contributions:- We introduce Corsort, a family of anytime sorting
algorithms based on estimators.- By simulation, we show that a well-configured
Corsort has a near-optimal termination time, and provides better intermediate
estimates than the best sorting algorithms we are aware of.
|
[{'version': 'v1', 'created': 'Mon, 24 Apr 2023 09:41:21 GMT'}]
|
2023-04-25
|
[array(['Caizergues', 'Emma', '', 'LINCS'], dtype=object)
array(['Durand', 'François', '', 'LINCS'], dtype=object)
array(['Mathieu', 'Fabien', '', 'LINCS'], dtype=object)]
|
16,566 |
1910.03848
|
Valentin Averchenko A
|
Valentin Averchenko, Denis Sych, Christoph Marquardt, Gerd Leuchs
|
Efficient generation of temporally shaped photons using nonlocal
spectral filtering
| null |
Phys. Rev. A 101, 013808 (2020)
|
10.1103/PhysRevA.101.013808
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the generation of single-photon pulses with the tailored temporal
shape via nonlocal spectral filtering. A shaped photon is heralded from a
time-energy entangled photon pair upon spectral filtering and time-resolved
detection of its entangled counterpart. We show that the temporal shape of the
heralded photon is defined by the time-inverted impulse response of the
spectral filter and does not depend on the heralding instant. Thus one can
avoid post-selection of particular heralding instants and achieve substantially
higher heralding rate of shaped photons as compared to the generation of
photons via nonlocal temporal modulation. Furthermore, the method can be used
to generate shaped photons with a coherence time in the ns-$\mu$s range and is
particularly suitable to produce photons with the exponentially rising temporal
shape required for efficient interfacing to a single quantum emitter in free
space.
|
[{'version': 'v1', 'created': 'Wed, 9 Oct 2019 08:48:58 GMT'}]
|
2020-01-15
|
[array(['Averchenko', 'Valentin', ''], dtype=object)
array(['Sych', 'Denis', ''], dtype=object)
array(['Marquardt', 'Christoph', ''], dtype=object)
array(['Leuchs', 'Gerd', ''], dtype=object)]
|
16,567 |
0904.3712
|
Istvan Kezsmarki
|
S. Bordacs, D. Varjas, I. Kezsmarki, G. Mihaly, L. Baldassarre, A.
Abouelsayed, C.A. Kuntscher, K. Ohgushi, Y. Tokura
|
Magnetic order induced crystal symmetry lowering in ACr$_2$O$_4$
ferrimagnetic spinels
|
4 pages, 4 figures. submitted to Phys. Rev. Lett
|
Physical Review Letters 103, 077205 (2009)
|
10.1103/PhysRevLett.103.077205
| null |
cond-mat.str-el cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We demonstrate that the onset of complex spin orders in ACr$_2$O$_4$ spinels
with magnetic A$=$Co, Fe and Cu ions lowers the lattice symmetry. This is
clearly indicated by the emergence of anisotropic lattice dynamics -- as
evidenced by the pronounced phonon splittings -- even when experiments probing
static distortions fail. We show that the crystal symmetry in the magnetic
phase is reduced from tetragonal to orthorhombic for FeCr$_2$O$_4$ and
CuCr$_2$O$_4$ with Jahn-Teller active A-site ions. The conical spin structure
in FeCr$_2$O$_4$ is also manifested in the phonon frequencies. In contrast, the
multiferroic CoCr$_2$O$_4$ with no orbital degrees of freedom remains nearly
cubic in its ground state.
|
[{'version': 'v1', 'created': 'Thu, 23 Apr 2009 14:48:00 GMT'}]
|
2014-01-15
|
[array(['Bordacs', 'S.', ''], dtype=object)
array(['Varjas', 'D.', ''], dtype=object)
array(['Kezsmarki', 'I.', ''], dtype=object)
array(['Mihaly', 'G.', ''], dtype=object)
array(['Baldassarre', 'L.', ''], dtype=object)
array(['Abouelsayed', 'A.', ''], dtype=object)
array(['Kuntscher', 'C. A.', ''], dtype=object)
array(['Ohgushi', 'K.', ''], dtype=object)
array(['Tokura', 'Y.', ''], dtype=object)]
|
16,568 |
hep-ph/0006050
|
Aaron K. Grant
|
Howard Georgi and Aaron K. Grant
|
A Topcolor Jungle Gym
|
23 pages, LaTeX, uses epsf and psfig
|
Phys.Rev.D63:015001,2001
|
10.1103/PhysRevD.63.015001
|
HUTP-00/A004
|
hep-ph
| null |
We discuss an alternative to the topcolor seesaw mechanism. In our scheme,
all the light quarks carry topcolor, and there are many composite SU(2)
doublets. This makes it possible to get the observed top quark mass and
observed $SU(2) \times U(1)$ breaking in a way that is quite different from the
classic seesaw mechanism. We discuss a model of this kind that arises naturally
in the context of dynamically broken topcolor. There are many composite scalars
in a theory of this kind. This has important effects on the Pagels-Stokar
relation and the Higgs mass. We find $m_{\rm Higgs} < 330$ GeV, lighter than in
typical topcolor models. We also show that the electroweak singlet quarks in
such a model can be lighter than the corresponding quarks in a seesaw model.
|
[{'version': 'v1', 'created': 'Mon, 5 Jun 2000 21:00:06 GMT'}]
|
2009-09-11
|
[array(['Georgi', 'Howard', ''], dtype=object)
array(['Grant', 'Aaron K.', ''], dtype=object)]
|
16,569 |
2103.16401
|
Pertti Mattila
|
Pertti Mattila
|
Parabolic rectifiability, tangent planes and tangent measures
|
32 pages. Many changes to the original version of which the most
important are the additions of (1) in Theorem 1.1, Sections 5 and 6, and
Example 8.2. new version: 33 pages, Lemmas 2.3, 2.4 and Theorem 4.9 changed,
plus several small changes
| null | null | null |
math.CA math.MG
|
http://creativecommons.org/licenses/by/4.0/
|
We define rectifiability in $\mathbb{R}^{n}\times\mathbb{R}$ with a parabolic
metric in terms of $C^1$ graphs and Lipschitz graphs with small Lipschitz
constants and we characterize it in terms of approximate tangent planes and
tangent measures. We also discuss relations between the parabolic
rectifiability and other notions of rectifiability.
|
[{'version': 'v1', 'created': 'Tue, 30 Mar 2021 14:51:28 GMT'}
{'version': 'v2', 'created': 'Fri, 16 Apr 2021 07:20:58 GMT'}
{'version': 'v3', 'created': 'Thu, 29 Apr 2021 09:01:50 GMT'}
{'version': 'v4', 'created': 'Thu, 7 Oct 2021 19:17:58 GMT'}]
|
2021-10-11
|
[array(['Mattila', 'Pertti', ''], dtype=object)]
|
16,570 |
1101.1749
|
Ion Cosma Fulga
|
I. C. Fulga, F. Hassler, A. R. Akhmerov and C. W. J. Beenakker
|
Scattering formula for the topological quantum number of a disordered
multi-mode wire
|
8 pages, 3 figures, this is the final, published version
|
Phys. Rev. B 83, 155429 (2011)
|
10.1103/PhysRevB.83.155429
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The topological quantum number Q of a superconducting or chiral insulating
wire counts the number of stable bound states at the end points. We determine Q
from the matrix r of reflection amplitudes from one of the ends, generalizing
the known result in the absence of time-reversal and chiral symmetry to all
five topologically nontrivial symmetry classes. The formula takes the form of
the determinant, Pfaffian, or matrix signature of r, depending on whether r is
a real matrix, a real antisymmetric matrix, or a Hermitian matrix. We apply
this formula to calculate the topological quantum number of N coupled dimerized
polymer chains, including the effects of disorder in the hopping constants. The
scattering theory relates a topological phase transition to a conductance peak,
of quantized height and with a universal (symmetry class independent) line
shape. Two peaks which merge are annihilated in the superconducting symmetry
classes, while they reinforce each other in the chiral symmetry classes.
|
[{'version': 'v1', 'created': 'Mon, 10 Jan 2011 09:45:06 GMT'}
{'version': 'v2', 'created': 'Thu, 21 Apr 2011 08:43:06 GMT'}]
|
2013-07-09
|
[array(['Fulga', 'I. C.', ''], dtype=object)
array(['Hassler', 'F.', ''], dtype=object)
array(['Akhmerov', 'A. R.', ''], dtype=object)
array(['Beenakker', 'C. W. J.', ''], dtype=object)]
|
16,571 |
1105.1314
|
Tommaso Roscilde
|
Tommaso Roscilde, Cristian Degli Esposti Boschi, Marcello Dalmonte
|
Pairing, crystallization and string correlations of mass-imbalanced
atomic mixtures in one-dimensional optical lattices
|
4 pages, 4 figures + Supplementary Material
|
EPL, 97 (2012) 23002
|
10.1209/0295-5075/97/23002
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We numerically determine the very rich phase diagram of mass-imbalanced
binary mixtures of hardcore bosons (or equivalently -- fermions, or
hardcore-Bose/Fermi mixtures) loaded in one-dimensional optical lattices.
Focusing on commensurate fillings away from half filling, we find a strong
asymmetry between attractive and repulsive interactions. Attraction is found to
always lead to pairing, associated with a spin gap, and to pair crystallization
for very strong mass imbalance. In the repulsive case the two atomic components
remain instead fully gapless over a large parameter range; only a very strong
mass imbalance leads to the opening of a spin gap. The spin-gap phase is the
precursor of a crystalline phase occurring for an even stronger mass imbalance.
The fundamental asymmetry of the phase diagram is at odds with recent
theoretical predictions, and can be tested directly via time-of-flight
experiments on trapped cold atoms.
|
[{'version': 'v1', 'created': 'Fri, 6 May 2011 15:55:52 GMT'}]
|
2013-05-16
|
[array(['Roscilde', 'Tommaso', ''], dtype=object)
array(['Boschi', 'Cristian Degli Esposti', ''], dtype=object)
array(['Dalmonte', 'Marcello', ''], dtype=object)]
|
16,572 |
math/0109010
|
Robin Chapman
|
Robin Chapman
|
Combinatorial proofs of q-series identities
|
14 pages. Submitted to Journal of Combinatorial Theory A
| null | null | null |
math.CO math.NT
| null |
We provide combinatorial proofs of some of the q-series identities considered
by Andrews, Jimenez-Urroz and Ono [q-series identities and values of certain
$L$-functions. Duke Math. J. 108 (2001), no. 3, 395--419].
|
[{'version': 'v1', 'created': 'Mon, 3 Sep 2001 09:07:00 GMT'}]
|
2007-05-23
|
[array(['Chapman', 'Robin', ''], dtype=object)]
|
16,573 |
1605.03966
|
Dominic Walton
|
D. J. Walton, J. A. Tomsick, K. K. Madsen, V. Grinberg, D. Barret, S.
E. Boggs, F. E. Christensen, M. Clavel, W. W. Craig, A. C. Fabian, F. Fuerst,
C. J. Hailey, F. A. Harrison, J. M. Miller, M. L. Parker, F. Rahoui, D.
Stern, L. Tao, J. Wilms, W. Zhang
|
The Soft State of Cygnus X-1 Observed with NuSTAR: A Variable Corona and
a Stable Inner Disk
|
Accepted for publication in ApJ; 13 pages, 12 figures
| null |
10.3847/0004-637X/826/1/87
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a multi-epoch hard X-ray analysis of Cygnus X-1 in its soft state
based on four observations with NuSTAR. Despite the basic similarity of the
observed spectra, there is clear spectral variability between epochs. To
investigate this variability, we construct a model incorporating both the
standard disk-corona continuum and relativistic reflection from the accretion
disk, based on prior NuSTAR work on Cygnus X-1, and apply this model to each
epoch independently. We find excellent consistency for the black hole spin, and
the iron abundance of the accretion disk, which are expected to remain constant
on observational timescales. In particular, we confirm that Cygnus X-1 hosts a
rapidly rotating black hole, 0.93<a*<0.96, in broad agreement with the majority
of prior studies of the relativistic disk reflection and constraints on the
spin obtained through studies of the thermal accretion disk continuum. Our work
also confirms the apparent misalignment between the inner disk and the orbital
plane of the binary system reported previously, finding the magnitude of this
warp to be ~10-15deg. This level of misalignment does not significantly change
(and may even improve) the agreement between our reflection results and the
thermal continuum results regarding the black hole spin. The spectral
variability observed by NuSTAR is dominated by the primary continuum, implying
variability in the temperature of the scattering electron plasma. Finally, we
consistently observe absorption from ionized iron at ~6.7 keV, which varies in
strength as a function of orbital phase in a manner consistent with the
absorbing material being an ionized phase of the focused stellar wind from the
supergiant companion star.
|
[{'version': 'v1', 'created': 'Thu, 12 May 2016 20:00:02 GMT'}]
|
2016-08-03
|
[array(['Walton', 'D. J.', ''], dtype=object)
array(['Tomsick', 'J. A.', ''], dtype=object)
array(['Madsen', 'K. K.', ''], dtype=object)
array(['Grinberg', 'V.', ''], dtype=object)
array(['Barret', 'D.', ''], dtype=object)
array(['Boggs', 'S. E.', ''], dtype=object)
array(['Christensen', 'F. E.', ''], dtype=object)
array(['Clavel', 'M.', ''], dtype=object)
array(['Craig', 'W. W.', ''], dtype=object)
array(['Fabian', 'A. C.', ''], dtype=object)
array(['Fuerst', 'F.', ''], dtype=object)
array(['Hailey', 'C. J.', ''], dtype=object)
array(['Harrison', 'F. A.', ''], dtype=object)
array(['Miller', 'J. M.', ''], dtype=object)
array(['Parker', 'M. L.', ''], dtype=object)
array(['Rahoui', 'F.', ''], dtype=object)
array(['Stern', 'D.', ''], dtype=object)
array(['Tao', 'L.', ''], dtype=object)
array(['Wilms', 'J.', ''], dtype=object)
array(['Zhang', 'W.', ''], dtype=object)]
|
16,574 |
1710.08523
|
Dominik Kriegner
|
D. Kriegner, H. Reichlova, J. Grenzer, W. Schmidt, E. Ressouche, J.
Godinho, T. Wagner, S. Y. Martin, A.B. Shick, V. V. Volobuev, G. Springholz,
V. Hol\'y, J. Wunderlich, T. Jungwirth, and K. V\'yborn\'y
|
Magnetic anisotropy in antiferromagnetic hexagonal MnTe
|
9 pages, 7 figures
|
Phys. Rev. B 96, 214418 (2017)
|
10.1103/PhysRevB.96.214418
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Antiferromagnetic hexagonal MnTe is a promising material for spintronic
devices relying on the control of antiferromagnetic domain orientations. Here
we report on neutron diffraction, magnetotransport, and magnetometry
experiments on semiconducting epitaxial MnTe thin films together with density
functional theory (DFT) calculations of the magnetic anisotropies.
The easy axes of the magnetic moments within the hexagonal basal plane are
determined to be along $\left<1\bar100\right>$ directions. The spin-flop
transition and concomitant repopulation of domains in strong magnetic fields is
observed.
Using epitaxially induced strain the onset of the spin-flop transition
changes from $\sim2$~T to $\sim0.5$~T for films grown on InP and SrF$_2$
substrates, respectively.
|
[{'version': 'v1', 'created': 'Mon, 23 Oct 2017 22:06:16 GMT'}
{'version': 'v2', 'created': 'Mon, 17 Sep 2018 19:37:28 GMT'}]
|
2018-09-19
|
[array(['Kriegner', 'D.', ''], dtype=object)
array(['Reichlova', 'H.', ''], dtype=object)
array(['Grenzer', 'J.', ''], dtype=object)
array(['Schmidt', 'W.', ''], dtype=object)
array(['Ressouche', 'E.', ''], dtype=object)
array(['Godinho', 'J.', ''], dtype=object)
array(['Wagner', 'T.', ''], dtype=object)
array(['Martin', 'S. Y.', ''], dtype=object)
array(['Shick', 'A. B.', ''], dtype=object)
array(['Volobuev', 'V. V.', ''], dtype=object)
array(['Springholz', 'G.', ''], dtype=object)
array(['Holý', 'V.', ''], dtype=object)
array(['Wunderlich', 'J.', ''], dtype=object)
array(['Jungwirth', 'T.', ''], dtype=object)
array(['Výborný', 'K.', ''], dtype=object)]
|
16,575 |
2002.02336
|
Stefan Ohm
|
H.E.S.S. Collaboration, H. Abdalla, R. Adam, F. Aharonian, F. Ait
Benkhali, E.O. Ang\"uner, M. Arakawa, C. Arcaro, C. Armand, T. Armstrong, H.
Ashkar, M. Backes, V. Barbosa Martins, M. Barnard, Y. Becherini, D. Berge, K.
Bernl\"ohr, R. Blackwell, M. B\"ottcher, C. Boisson, J. Bolmont, S. Bonnefoy,
J. Bregeon, M. Breuhaus, F. Brun, P. Brun, M. Bryan, M. B\"uchele, T. Bulik,
T. Bylund, S. Caroff, A. Carosi, S. Casanova, M. Cerruti, T. Chand, S.
Chandra, A. Chen, S. Colafrancesco, G. Cotter, M. Cury{\l}o, I.D. Davids, J.
Davies, C. Deil, J. Devin, P. deWilt, L. Dirson, A. Djannati-Ata\"i, A.
Dmytriiev, A. Donath, V. Doroshenko, J. Dyks, K. Egberts, F. Eichhorn, G.
Emery, J.-P. Ernenwein, S. Eschbach, K. Feijen, S. Fegan, A. Fiasson, G.
Fontaine, S. Funk, M. F\"u{\ss}ling, S. Gabici, Y.A. Gallant, F. Gat\'e, G.
Giavitto, L. Giunti, D. Glawion, J.F. Glicenstein, D. Gottschall, M.-H.
Grondin, J. Hahn, M. Haupt, G. Heinzelmann, G. Henri, G. Hermann, J.A.
Hinton, W. Hofmann, C. Hoischen, T. L. Holch, M. Holler, M. H\"orbe, D.
Horns, D. Huber, H. Iwasaki, M. Jamrozy, D. Jankowsky, F. Jankowsky, A.
Jardin-Blicq, V. Joshi, I. Jung-Richardt, M.A. Kastendieck, K. Katarzy\'nski,
M. Katsuragawa, U. Katz, D. Khangulyan, B. Kh\'elifi, J. King, S. Klepser, W.
Klu\'zniak, Nu. Komin, K. Kosack, D. Kostunin, M. Kreter, G. Lamanna, A.
Lemi\`ere, M. Lemoine-Goumard, J.-P. Lenain, E. Leser, C. Levy, T. Lohse, I.
Lypova, J. Mackey, J. Majumdar, D. Malyshev, D. Malyshev, V. Marandon, P.
Marchegiani, A. Marcowith, A. Mares, G. Mart\'i-Devesa, R. Marx, G. Maurin,
P.J. Meintjes, R. Moderski, M. Mohamed, L. Mohrmann, C. Moore, P. Morris, E.
Moulin, J. Muller, T. Murach, S. Nakashima, K. Nakashima, M. de Naurois, H.
Ndiyavala, F. Niederwanger, J. Niemiec, L. Oakes, P. O'Brien, H. Odaka, S.
Ohm, E. de Ona Wilhelmi, M. Ostrowski, M. Panter, R.D. Parsons, C. Perennes,
P.-O. Petrucci, B. Peyaud, Q. Piel, S. Pita, V. Poireau, A. Priyana Noel,
D.A. Prokhorov, H. Prokoph, G. P\"uhlhofer, M. Punch, A. Quirrenbach, S.
Raab, R. Rauth, A. Reimer, O. Reimer, Q. Remy, M. Renaud, F. Rieger, L.
Rinchiuso, C. Romoli, G. Rowell, B. Rudak, E. Ruiz-Velasco, V. Sahakian, S.
Sailer, S. Saito, D.A. Sanchez, A. Santangelo, M. Sasaki, M. Scalici, R.
Schlickeiser, F. Sch\"ussler, A. Schulz, H.M. Schutte, U. Schwanke, S.
Schwemmer, M. Seglar-Arroyo, M. Senniappan, A.S. Seyffert, N. Shafi, K.
Shiningayamwe, R. Simoni, A. Sinha, H. Sol, A. Specovius, S. Spencer, M.
Spir-Jacob, {\L}. Stawarz, R. Steenkamp, C. Stegmann, C. Steppa, T.
Takahashi, T. Tavernier, A.M. Taylor, R. Terrier, D. Tiziani, M. Tluczykont,
L. Tomankova, C. Trichard, M. Tsirou, N. Tsuji, R. Tuffs, Y. Uchiyama, D.J.
van der Walt, C. van Eldik, C. van Rensburg, B. van Soelen, G. Vasileiadis,
J. Veh, C. Venter, P. Vincent, J. Vink, H.J. V\"olk, T. Vuillaume, Z.
Wadiasingh, S.J. Wagner, J. Watson, F. Werner, R. White, A. Wierzcholska, R.
Yang, H. Yoneda, M. Zacharias, R. Zanin, A.A. Zdziarski, A. Zech, J. Zorn, N.
Zywucka
|
Detection of very-high-energy {\gamma}-ray emission from the colliding
wind binary {\eta} Car with H.E.S.S
|
9 pages, 4 figures, 3 tables, in press with A&A
|
A&A 635, A167 (2020)
|
10.1051/0004-6361/201936761
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Aims. Colliding wind binary systems have long been suspected to be
high-energy (HE; 100 MeV < E < 100 GeV) {\gamma}-ray emitters. {\eta} Car is
the most prominent member of this object class and is confirmed to emit
phase-locked HE {\gamma} rays from hundreds of MeV to ~100 GeV energies. This
work aims to search for and characterise the very-high-energy (VHE; E >100 GeV)
{\gamma}-ray emission from {\eta} Car around the last periastron passage in
2014 with the ground-based High Energy Stereoscopic System (H.E.S.S.). Methods.
The region around {\eta} Car was observed with H.E.S.S. between orbital phase p
= 0.78 - 1.10, with a closer sampling at p {\approx} 0.95 and p {\approx} 1.10
(assuming a period of 2023 days). Optimised hardware settings as well as
adjustments to the data reduction, reconstruction, and signal selection were
needed to suppress and take into account the strong, extended, and
inhomogeneous night sky background (NSB) in the {\eta} Car field of view.
Tailored run-wise Monte-Carlo simulations (RWS) were required to accurately
treat the additional noise from NSB photons in the instrument response
functions. Results. H.E.S.S. detected VHE {\gamma}-ray emission from the
direction of {\eta} Car shortly before and after the minimum in the X-ray
light-curve close to periastron. Using the point spread function provided by
RWS, the reconstructed signal is point-like and the spectrum is best described
by a power law. The overall flux and spectral index in VHE {\gamma} rays agree
within statistical and systematic errors before and after periastron. The
{\gamma}-ray spectrum extends up to at least ~400 GeV. This implies a maximum
magnetic field in a leptonic scenario in the emission region of 0.5 Gauss. No
indication for phase-locked flux variations is detected in the H.E.S.S. data.
|
[{'version': 'v1', 'created': 'Thu, 6 Feb 2020 16:33:14 GMT'}]
|
2020-04-01
|
[array(['Collaboration', 'H. E. S. S.', ''], dtype=object)
array(['Abdalla', 'H.', ''], dtype=object)
array(['Adam', 'R.', ''], dtype=object)
array(['Aharonian', 'F.', ''], dtype=object)
array(['Benkhali', 'F. Ait', ''], dtype=object)
array(['Angüner', 'E. O.', ''], dtype=object)
array(['Arakawa', 'M.', ''], dtype=object)
array(['Arcaro', 'C.', ''], dtype=object)
array(['Armand', 'C.', ''], dtype=object)
array(['Armstrong', 'T.', ''], dtype=object)
array(['Ashkar', 'H.', ''], dtype=object)
array(['Backes', 'M.', ''], dtype=object)
array(['Martins', 'V. Barbosa', ''], dtype=object)
array(['Barnard', 'M.', ''], dtype=object)
array(['Becherini', 'Y.', ''], dtype=object)
array(['Berge', 'D.', ''], dtype=object)
array(['Bernlöhr', 'K.', ''], dtype=object)
array(['Blackwell', 'R.', ''], dtype=object)
array(['Böttcher', 'M.', ''], dtype=object)
array(['Boisson', 'C.', ''], dtype=object)
array(['Bolmont', 'J.', ''], dtype=object)
array(['Bonnefoy', 'S.', ''], dtype=object)
array(['Bregeon', 'J.', ''], dtype=object)
array(['Breuhaus', 'M.', ''], dtype=object)
array(['Brun', 'F.', ''], dtype=object)
array(['Brun', 'P.', ''], dtype=object)
array(['Bryan', 'M.', ''], dtype=object)
array(['Büchele', 'M.', ''], dtype=object)
array(['Bulik', 'T.', ''], dtype=object)
array(['Bylund', 'T.', ''], dtype=object)
array(['Caroff', 'S.', ''], dtype=object)
array(['Carosi', 'A.', ''], dtype=object)
array(['Casanova', 'S.', ''], dtype=object)
array(['Cerruti', 'M.', ''], dtype=object)
array(['Chand', 'T.', ''], dtype=object)
array(['Chandra', 'S.', ''], dtype=object)
array(['Chen', 'A.', ''], dtype=object)
array(['Colafrancesco', 'S.', ''], dtype=object)
array(['Cotter', 'G.', ''], dtype=object)
array(['Curyło', 'M.', ''], dtype=object)
array(['Davids', 'I. D.', ''], dtype=object)
array(['Davies', 'J.', ''], dtype=object)
array(['Deil', 'C.', ''], dtype=object)
array(['Devin', 'J.', ''], dtype=object)
array(['deWilt', 'P.', ''], dtype=object)
array(['Dirson', 'L.', ''], dtype=object)
array(['Djannati-Ataï', 'A.', ''], dtype=object)
array(['Dmytriiev', 'A.', ''], dtype=object)
array(['Donath', 'A.', ''], dtype=object)
array(['Doroshenko', 'V.', ''], dtype=object)
array(['Dyks', 'J.', ''], dtype=object)
array(['Egberts', 'K.', ''], dtype=object)
array(['Eichhorn', 'F.', ''], dtype=object)
array(['Emery', 'G.', ''], dtype=object)
array(['Ernenwein', 'J. -P.', ''], dtype=object)
array(['Eschbach', 'S.', ''], dtype=object)
array(['Feijen', 'K.', ''], dtype=object)
array(['Fegan', 'S.', ''], dtype=object)
array(['Fiasson', 'A.', ''], dtype=object)
array(['Fontaine', 'G.', ''], dtype=object)
array(['Funk', 'S.', ''], dtype=object)
array(['Füßling', 'M.', ''], dtype=object)
array(['Gabici', 'S.', ''], dtype=object)
array(['Gallant', 'Y. A.', ''], dtype=object)
array(['Gaté', 'F.', ''], dtype=object)
array(['Giavitto', 'G.', ''], dtype=object)
array(['Giunti', 'L.', ''], dtype=object)
array(['Glawion', 'D.', ''], dtype=object)
array(['Glicenstein', 'J. F.', ''], dtype=object)
array(['Gottschall', 'D.', ''], dtype=object)
array(['Grondin', 'M. -H.', ''], dtype=object)
array(['Hahn', 'J.', ''], dtype=object)
array(['Haupt', 'M.', ''], dtype=object)
array(['Heinzelmann', 'G.', ''], dtype=object)
array(['Henri', 'G.', ''], dtype=object)
array(['Hermann', 'G.', ''], dtype=object)
array(['Hinton', 'J. A.', ''], dtype=object)
array(['Hofmann', 'W.', ''], dtype=object)
array(['Hoischen', 'C.', ''], dtype=object)
array(['Holch', 'T. L.', ''], dtype=object)
array(['Holler', 'M.', ''], dtype=object)
array(['Hörbe', 'M.', ''], dtype=object)
array(['Horns', 'D.', ''], dtype=object)
array(['Huber', 'D.', ''], dtype=object)
array(['Iwasaki', 'H.', ''], dtype=object)
array(['Jamrozy', 'M.', ''], dtype=object)
array(['Jankowsky', 'D.', ''], dtype=object)
array(['Jankowsky', 'F.', ''], dtype=object)
array(['Jardin-Blicq', 'A.', ''], dtype=object)
array(['Joshi', 'V.', ''], dtype=object)
array(['Jung-Richardt', 'I.', ''], dtype=object)
array(['Kastendieck', 'M. A.', ''], dtype=object)
array(['Katarzyński', 'K.', ''], dtype=object)
array(['Katsuragawa', 'M.', ''], dtype=object)
array(['Katz', 'U.', ''], dtype=object)
array(['Khangulyan', 'D.', ''], dtype=object)
array(['Khélifi', 'B.', ''], dtype=object)
array(['King', 'J.', ''], dtype=object)
array(['Klepser', 'S.', ''], dtype=object)
array(['Kluźniak', 'W.', ''], dtype=object)
array(['Komin', 'Nu.', ''], dtype=object)
array(['Kosack', 'K.', ''], dtype=object)
array(['Kostunin', 'D.', ''], dtype=object)
array(['Kreter', 'M.', ''], dtype=object)
array(['Lamanna', 'G.', ''], dtype=object)
array(['Lemière', 'A.', ''], dtype=object)
array(['Lemoine-Goumard', 'M.', ''], dtype=object)
array(['Lenain', 'J. -P.', ''], dtype=object)
array(['Leser', 'E.', ''], dtype=object)
array(['Levy', 'C.', ''], dtype=object)
array(['Lohse', 'T.', ''], dtype=object)
array(['Lypova', 'I.', ''], dtype=object)
array(['Mackey', 'J.', ''], dtype=object)
array(['Majumdar', 'J.', ''], dtype=object)
array(['Malyshev', 'D.', ''], dtype=object)
array(['Malyshev', 'D.', ''], dtype=object)
array(['Marandon', 'V.', ''], dtype=object)
array(['Marchegiani', 'P.', ''], dtype=object)
array(['Marcowith', 'A.', ''], dtype=object)
array(['Mares', 'A.', ''], dtype=object)
array(['Martí-Devesa', 'G.', ''], dtype=object)
array(['Marx', 'R.', ''], dtype=object)
array(['Maurin', 'G.', ''], dtype=object)
array(['Meintjes', 'P. J.', ''], dtype=object)
array(['Moderski', 'R.', ''], dtype=object)
array(['Mohamed', 'M.', ''], dtype=object)
array(['Mohrmann', 'L.', ''], dtype=object)
array(['Moore', 'C.', ''], dtype=object)
array(['Morris', 'P.', ''], dtype=object)
array(['Moulin', 'E.', ''], dtype=object)
array(['Muller', 'J.', ''], dtype=object)
array(['Murach', 'T.', ''], dtype=object)
array(['Nakashima', 'S.', ''], dtype=object)
array(['Nakashima', 'K.', ''], dtype=object)
array(['de Naurois', 'M.', ''], dtype=object)
array(['Ndiyavala', 'H.', ''], dtype=object)
array(['Niederwanger', 'F.', ''], dtype=object)
array(['Niemiec', 'J.', ''], dtype=object)
array(['Oakes', 'L.', ''], dtype=object)
array(["O'Brien", 'P.', ''], dtype=object)
array(['Odaka', 'H.', ''], dtype=object)
array(['Ohm', 'S.', ''], dtype=object)
array(['Wilhelmi', 'E. de Ona', ''], dtype=object)
array(['Ostrowski', 'M.', ''], dtype=object)
array(['Panter', 'M.', ''], dtype=object)
array(['Parsons', 'R. D.', ''], dtype=object)
array(['Perennes', 'C.', ''], dtype=object)
array(['Petrucci', 'P. -O.', ''], dtype=object)
array(['Peyaud', 'B.', ''], dtype=object)
array(['Piel', 'Q.', ''], dtype=object)
array(['Pita', 'S.', ''], dtype=object)
array(['Poireau', 'V.', ''], dtype=object)
array(['Noel', 'A. Priyana', ''], dtype=object)
array(['Prokhorov', 'D. A.', ''], dtype=object)
array(['Prokoph', 'H.', ''], dtype=object)
array(['Pühlhofer', 'G.', ''], dtype=object)
array(['Punch', 'M.', ''], dtype=object)
array(['Quirrenbach', 'A.', ''], dtype=object)
array(['Raab', 'S.', ''], dtype=object)
array(['Rauth', 'R.', ''], dtype=object)
array(['Reimer', 'A.', ''], dtype=object)
array(['Reimer', 'O.', ''], dtype=object)
array(['Remy', 'Q.', ''], dtype=object)
array(['Renaud', 'M.', ''], dtype=object)
array(['Rieger', 'F.', ''], dtype=object)
array(['Rinchiuso', 'L.', ''], dtype=object)
array(['Romoli', 'C.', ''], dtype=object)
array(['Rowell', 'G.', ''], dtype=object)
array(['Rudak', 'B.', ''], dtype=object)
array(['Ruiz-Velasco', 'E.', ''], dtype=object)
array(['Sahakian', 'V.', ''], dtype=object)
array(['Sailer', 'S.', ''], dtype=object)
array(['Saito', 'S.', ''], dtype=object)
array(['Sanchez', 'D. A.', ''], dtype=object)
array(['Santangelo', 'A.', ''], dtype=object)
array(['Sasaki', 'M.', ''], dtype=object)
array(['Scalici', 'M.', ''], dtype=object)
array(['Schlickeiser', 'R.', ''], dtype=object)
array(['Schüssler', 'F.', ''], dtype=object)
array(['Schulz', 'A.', ''], dtype=object)
array(['Schutte', 'H. M.', ''], dtype=object)
array(['Schwanke', 'U.', ''], dtype=object)
array(['Schwemmer', 'S.', ''], dtype=object)
array(['Seglar-Arroyo', 'M.', ''], dtype=object)
array(['Senniappan', 'M.', ''], dtype=object)
array(['Seyffert', 'A. S.', ''], dtype=object)
array(['Shafi', 'N.', ''], dtype=object)
array(['Shiningayamwe', 'K.', ''], dtype=object)
array(['Simoni', 'R.', ''], dtype=object)
array(['Sinha', 'A.', ''], dtype=object)
array(['Sol', 'H.', ''], dtype=object)
array(['Specovius', 'A.', ''], dtype=object)
array(['Spencer', 'S.', ''], dtype=object)
array(['Spir-Jacob', 'M.', ''], dtype=object)
array(['Stawarz', 'Ł.', ''], dtype=object)
array(['Steenkamp', 'R.', ''], dtype=object)
array(['Stegmann', 'C.', ''], dtype=object)
array(['Steppa', 'C.', ''], dtype=object)
array(['Takahashi', 'T.', ''], dtype=object)
array(['Tavernier', 'T.', ''], dtype=object)
array(['Taylor', 'A. M.', ''], dtype=object)
array(['Terrier', 'R.', ''], dtype=object)
array(['Tiziani', 'D.', ''], dtype=object)
array(['Tluczykont', 'M.', ''], dtype=object)
array(['Tomankova', 'L.', ''], dtype=object)
array(['Trichard', 'C.', ''], dtype=object)
array(['Tsirou', 'M.', ''], dtype=object)
array(['Tsuji', 'N.', ''], dtype=object)
array(['Tuffs', 'R.', ''], dtype=object)
array(['Uchiyama', 'Y.', ''], dtype=object)
array(['van der Walt', 'D. J.', ''], dtype=object)
array(['van Eldik', 'C.', ''], dtype=object)
array(['van Rensburg', 'C.', ''], dtype=object)
array(['van Soelen', 'B.', ''], dtype=object)
array(['Vasileiadis', 'G.', ''], dtype=object)
array(['Veh', 'J.', ''], dtype=object)
array(['Venter', 'C.', ''], dtype=object)
array(['Vincent', 'P.', ''], dtype=object)
array(['Vink', 'J.', ''], dtype=object)
array(['Völk', 'H. J.', ''], dtype=object)
array(['Vuillaume', 'T.', ''], dtype=object)
array(['Wadiasingh', 'Z.', ''], dtype=object)
array(['Wagner', 'S. J.', ''], dtype=object)
array(['Watson', 'J.', ''], dtype=object)
array(['Werner', 'F.', ''], dtype=object)
array(['White', 'R.', ''], dtype=object)
array(['Wierzcholska', 'A.', ''], dtype=object)
array(['Yang', 'R.', ''], dtype=object)
array(['Yoneda', 'H.', ''], dtype=object)
array(['Zacharias', 'M.', ''], dtype=object)
array(['Zanin', 'R.', ''], dtype=object)
array(['Zdziarski', 'A. A.', ''], dtype=object)
array(['Zech', 'A.', ''], dtype=object)
array(['Zorn', 'J.', ''], dtype=object)
array(['Zywucka', 'N.', ''], dtype=object)]
|
16,576 |
cond-mat/9408062
|
Martin Gelfand
|
Ian Affleck, Martin P. Gelfand, and Rajiv R. P. Singh
|
A Plane of Weakly Coupled Heisenberg Chains: Theoretical Arguments and
Numerical Calculations
|
21 pages, 10 postscript figures, REVTEX version 3
| null |
10.1088/0305-4470/27/22/009
| null |
cond-mat
| null |
The $S=1/2$, nearest-neighbor, quantum Heisenberg antiferromagnet on the
square lattice with spatially anisotropic couplings is reconsidered, with
particular attention to the following question: at T=0, does N\'eel
orderdevelop at infinitesimal interchain coupling, or is there a nonzero
critical coupling? A heuristic renormalization group argument is presented
which suggests that previous theoretical answers to that question are incorrect
or at least incomplete, and that the answer is not universal but rather depends
on the microscopic details of the model under consideration. Numerical
investigations of the nearest-neighbor model are carried out {\it via}
zero-temperature series expansions about Ising and dimer Hamiltonians. The
results are entirely consistent with a vanishing critical interchain coupling
ratio $R_c$; if $R_c$ is finite, it is unlikely to substantially exceed 0.02.
|
[{'version': 'v1', 'created': 'Fri, 19 Aug 1994 18:04:47 GMT'}]
|
2011-01-06
|
[array(['Affleck', 'Ian', ''], dtype=object)
array(['Gelfand', 'Martin P.', ''], dtype=object)
array(['Singh', 'Rajiv R. P.', ''], dtype=object)]
|
16,577 |
2210.06681
|
Xuan Kan
|
Xuan Kan, Wei Dai, Hejie Cui, Zilong Zhang, Ying Guo, Carl Yang
|
Brain Network Transformer
|
Accepted to NeurIPS 2022. The previous version is accepted for
Workshop ICML-IMLH 2022 (Oral, no proceedings)
| null | null | null |
cs.LG cs.CV cs.NE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Human brains are commonly modeled as networks of Regions of Interest (ROIs)
and their connections for the understanding of brain functions and mental
disorders. Recently, Transformer-based models have been studied over different
types of data, including graphs, shown to bring performance gains widely. In
this work, we study Transformer-based models for brain network analysis. Driven
by the unique properties of data, we model brain networks as graphs with nodes
of fixed size and order, which allows us to (1) use connection profiles as node
features to provide natural and low-cost positional information and (2) learn
pair-wise connection strengths among ROIs with efficient attention weights
across individuals that are predictive towards downstream analysis tasks.
Moreover, we propose an Orthonormal Clustering Readout operation based on
self-supervised soft clustering and orthonormal projection. This design
accounts for the underlying functional modules that determine similar behaviors
among groups of ROIs, leading to distinguishable cluster-aware node embeddings
and informative graph embeddings. Finally, we re-standardize the evaluation
pipeline on the only one publicly available large-scale brain network dataset
of ABIDE, to enable meaningful comparison of different models. Experiment
results show clear improvements of our proposed Brain Network Transformer on
both the public ABIDE and our restricted ABCD datasets. The implementation is
available at https://github.com/Wayfear/BrainNetworkTransformer.
|
[{'version': 'v1', 'created': 'Thu, 13 Oct 2022 02:30:06 GMT'}
{'version': 'v2', 'created': 'Sat, 15 Oct 2022 19:46:45 GMT'}]
|
2022-10-18
|
[array(['Kan', 'Xuan', ''], dtype=object)
array(['Dai', 'Wei', ''], dtype=object)
array(['Cui', 'Hejie', ''], dtype=object)
array(['Zhang', 'Zilong', ''], dtype=object)
array(['Guo', 'Ying', ''], dtype=object)
array(['Yang', 'Carl', ''], dtype=object)]
|
16,578 |
1908.07981
|
Jack F. Gallimore
|
C. M. Violette Impellizzeri, Jack F. Gallimore, Stefi A. Baum, Moshe
Elitzur, Richard Davies, Dieter Lutz, Roberto Maiolino, Alessandro Marconi,
Robert Nikutta, Christopher P. O'Dea, Eleonora Sani
|
Counter-Rotation and High Velocity Outflow in the Parsec-Scale Molecular
Torus of NGC 1068
|
8 pages, 4 figures; accepted for publication in The Astrophysical
Journal Letters
| null |
10.3847/2041-8213/ab3c64
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present 1.4 pc resolution observations of 256 GHz nuclear radio continuum
and HCN ($J=3 \to 2$) in the molecular torus of NGC 1068. The integrated radio
continuum emission has a flat spectrum consistent with free-free emission and
resolves into an X-shaped structure resembling an edge-brightened bicone. HCN
is detected in absorption against the continuum, and the absorption spectrum
shows a pronounced blue wing that suggests a high-velocity molecular outflow
with speeds reaching 450 km/s. Analysis of the off-nucleus emission line
kinematics and morphology reveals two nested, rotating disk components. The
inner disk, inside $r\sim 1.2$ pc, has kinematics consistent with the nearly
edge-on, geometrically thin water megamaser disk in Keplerian rotation around a
central mass of $1.66\times 10^7\,\mbox{M}_\odot$. The outer disk, which
extends to $\sim 7$~pc radius, counter-rotates relative to the inner disk. The
rotation curve of the outer disk is consistent with rotation around the same
central mass as the megamaser disk but in the opposite sense. The morphology of
the molecular gas is asymmetric around the nuclear continuum source. We
speculate that the outer disk formed from more recently introduced molecular
gas falling out of the host galaxy or from a captured dwarf satellite galaxy.
In NGC 1068, we find direct evidence that the molecular torus consists of
counter-rotating and misaligned disks on parsec scales.
|
[{'version': 'v1', 'created': 'Wed, 21 Aug 2019 16:45:12 GMT'}
{'version': 'v2', 'created': 'Fri, 23 Aug 2019 10:24:04 GMT'}]
|
2019-11-06
|
[array(['Impellizzeri', 'C. M. Violette', ''], dtype=object)
array(['Gallimore', 'Jack F.', ''], dtype=object)
array(['Baum', 'Stefi A.', ''], dtype=object)
array(['Elitzur', 'Moshe', ''], dtype=object)
array(['Davies', 'Richard', ''], dtype=object)
array(['Lutz', 'Dieter', ''], dtype=object)
array(['Maiolino', 'Roberto', ''], dtype=object)
array(['Marconi', 'Alessandro', ''], dtype=object)
array(['Nikutta', 'Robert', ''], dtype=object)
array(["O'Dea", 'Christopher P.', ''], dtype=object)
array(['Sani', 'Eleonora', ''], dtype=object)]
|
16,579 |
hep-th/9811213
|
Bogdan Morariu
|
Daniel Brace, Bogdan Morariu, Bruno Zumino
|
T-Duality and Ramond-Ramond Backgrounds in the Matrix Model
|
LaTeX, 17 pages, no figures
|
Nucl.Phys.B549:181-193,1999
|
10.1016/S0550-3213(99)00168-6
|
LBNL-42548, UCB-PTH-98/56
|
hep-th
| null |
We investigate T-duality of toroidally compactified Matrix model with
arbitrary Ramond-Ramond backgrounds in the framework of noncommutative super
Yang-Mills gauge theory.
|
[{'version': 'v1', 'created': 'Wed, 25 Nov 1998 00:50:44 GMT'}]
|
2008-11-26
|
[array(['Brace', 'Daniel', ''], dtype=object)
array(['Morariu', 'Bogdan', ''], dtype=object)
array(['Zumino', 'Bruno', ''], dtype=object)]
|
16,580 |
1811.10165
|
Christian Offen
|
Christian Offen
|
Local intersections of Lagrangian manifolds correspond to catastrophe
theory
| null | null | null | null |
math.SG
|
http://creativecommons.org/licenses/by/4.0/
|
Two smooth map germs are right-equivalent if and only if they generate two
Lagrangian submanifolds in a cotangent bundle which have the same contact with
the zero-section. In this paper we provide a reverse direction to this
classical result of Golubitsky and Guillemin. Two Lagrangian submanifolds of a
symplectic manifold have the same contact with a third Lagrangian submanifold
if and only if the intersection problems correspond to stably right equivalent
map germs. We, therefore, obtain a correspondence between local Lagrangian
intersection problems and catastrophe theory while the classical version only
captures tangential intersections. The correspondence is defined independently
of any Lagrangian fibration of the ambient symplectic manifold, in contrast to
other classical results. Moreover, we provide an extension of the
correspondence to families of local Lagrangian intersection problems. This
gives rise to a framework which allows a natural transportation of the notions
of catastrophe theory such as stability, unfolding and (uni-)versality to the
geometric setting such that we obtain a classification of families of local
Lagrangian intersection problems. An application is the classification of
Lagrangian boundary value problems for symplectic maps.
|
[{'version': 'v1', 'created': 'Mon, 26 Nov 2018 03:41:59 GMT'}
{'version': 'v2', 'created': 'Mon, 11 Feb 2019 23:58:13 GMT'}
{'version': 'v3', 'created': 'Fri, 27 Mar 2020 17:39:21 GMT'}
{'version': 'v4', 'created': 'Sun, 7 Feb 2021 13:25:28 GMT'}
{'version': 'v5', 'created': 'Wed, 22 Dec 2021 11:00:09 GMT'}]
|
2021-12-23
|
[array(['Offen', 'Christian', ''], dtype=object)]
|
16,581 |
1702.08078
|
Yuhong Wang
|
Yuhong Wang, Junzhou Huang, Wei Li, Sheng Wang, Chuanfan Ding
|
Intra-protein binding peptide fragments have specific and intrinsic
sequence patterns
|
6 figures
| null | null | null |
q-bio.BM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The key finding in the DNA double helix model is the specific pairing or
binding between nucleotides A-T and C-G, and the pairing rules are the molecule
basis of genetic code. Unfortunately, no such rules have been discovered for
proteins. Here we show that similar rules and intrinsic sequence patterns
between intra-protein binding peptide fragments do exist, and they can be
extracted using a deep learning algorithm. Multi-millions of binding and
non-binding peptide fragments from currently available protein X-ray structures
are classified with an accuracy of up to 93%. This discovery has the potential
in helping solve protein folding and protein-protein interaction problems, two
open and fundamental problems in molecular biology.
|
[{'version': 'v1', 'created': 'Sun, 26 Feb 2017 20:13:20 GMT'}]
|
2017-02-28
|
[array(['Wang', 'Yuhong', ''], dtype=object)
array(['Huang', 'Junzhou', ''], dtype=object)
array(['Li', 'Wei', ''], dtype=object)
array(['Wang', 'Sheng', ''], dtype=object)
array(['Ding', 'Chuanfan', ''], dtype=object)]
|
16,582 |
0903.2447
|
Vishal Shah
|
V. Shah, M. V. Romalis
|
Spin-Exchange-Relaxation-Free Magnetometry Using Elliptically-Polarized
Light
| null | null | null | null |
physics.atom-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Spin-exchange relaxation free alkali-metal magnetometers typically operate in
the regime of high optical density, presenting challenges for simple and
efficient optical pumping and detection. We describe a high-sensitivity Rb
magnetometer using a single elliptically-polarized off-resonant laser beam.
Circular component of the light creates relatively uniform spin polarization
while the linear component is used to measure optical rotation generated by the
atoms. Modulation of the atomic spin direction with an oscillating magnetic
field shifts the detected signal to high frequencies. Using a fiber-coupled DFB
laser we achieve magnetic field sensitivity of 7 fT/$\sqrt{% \mathrm{Hz}}$ with
a miniature $5\times5\times5$ mm Rb vapor cell.
|
[{'version': 'v1', 'created': 'Fri, 13 Mar 2009 17:54:34 GMT'}]
|
2009-03-16
|
[array(['Shah', 'V.', ''], dtype=object)
array(['Romalis', 'M. V.', ''], dtype=object)]
|
16,583 |
1411.4503
|
Itamar Katz
|
Itamar Katz and Koby Crammer
|
Outlier-Robust Convex Segmentation
|
* Accepted to AAAI-15, this version includes the
appendix/supplementary material referenced in the AAAI-15 submission, as well
as color figures * This version include some minor typos correction
| null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We derive a convex optimization problem for the task of segmenting sequential
data, which explicitly treats presence of outliers. We describe two algorithms
for solving this problem, one exact and one a top-down novel approach, and we
derive a consistency results for the case of two segments and no outliers.
Robustness to outliers is evaluated on two real-world tasks related to speech
segmentation. Our algorithms outperform baseline segmentation algorithms.
|
[{'version': 'v1', 'created': 'Mon, 17 Nov 2014 14:59:25 GMT'}
{'version': 'v2', 'created': 'Tue, 18 Nov 2014 07:59:33 GMT'}]
|
2014-11-19
|
[array(['Katz', 'Itamar', ''], dtype=object)
array(['Crammer', 'Koby', ''], dtype=object)]
|
16,584 |
1812.01399
|
Adrien Meynard
|
Adrien Meynard
|
Joint nonstationary blind source separation and spectral analysis
|
in Proceedings of iTWIST'18, Paper-ID: 13, Marseille, France,
November, 21-23, 2018
| null | null | null |
eess.SP
|
http://creativecommons.org/licenses/by/4.0/
|
We address a nonstationary blind source separation (BSS) problem. The model
includes both nonstationary sources and mixing. Therefore, we introduce an
algorithm for joint BSS and estimation of stationarity-breaking deformations
and spectra. Finally, its performances are evaluated on a synthetic example.
|
[{'version': 'v1', 'created': 'Tue, 4 Dec 2018 13:27:02 GMT'}]
|
2018-12-05
|
[array(['Meynard', 'Adrien', ''], dtype=object)]
|
16,585 |
hep-ph/9810202
|
Alexander E. Kaloshin
|
A.E.Kaloshin
|
Compton scattering by pion: there is no room for the off-shell effects
|
11 pages, LaTeX2e, 4 figures included
|
Phys.Atom.Nucl. 62 (1999) 1899-1904; Yad.Fiz. 62 (1999) 2049-2054
| null |
ISU-IAP.Th 98-07, Irkutsk
|
hep-ph
| null |
We show that the off-shell contributions in Compton scattering by pion may
exist only in the single exchange diagrams. These contributions are canceled
completely in the total gauge-invariant amplitude as it confirmed by one-loop
calculations. It explains, in particular, some results of the chiral
pertubation theory in the order $p^4$ but this cancelation has no relation to
chiral symmetry.
|
[{'version': 'v1', 'created': 'Thu, 1 Oct 1998 07:39:53 GMT'}]
|
2007-05-23
|
[array(['Kaloshin', 'A. E.', ''], dtype=object)]
|
16,586 |
hep-ph/0101334
|
Koichi Yoshioka
|
N. Haba, J. Sato, M. Tanimoto and K. Yoshioka
|
Possible Flavor Mixing Structures of Lepton Mass Matrices
|
21 pages
|
Phys.Rev. D64 (2001) 113016
|
10.1103/PhysRevD.64.113016
| null |
hep-ph
| null |
To search for possible textures of lepton mass matrices, we systematically
examine flavor mixing structures which can lead to large lepton mixing angles.
We find out 37 mixing patterns are consistent with experimental data, taking
into account phase factors in the mixing matrices. Only six of the patterns can
explain the observed data without any tuning of parameters, while the others
need particular choices for the phase values. It is found that these six mixing
patterns are those predicted by the models which have been proposed to account
for fermion mass hierarchies. On the other hand, the others may give new flavor
mixing structures of lepton mass matrices and therefore new possibilities of
model construction.
|
[{'version': 'v1', 'created': 'Tue, 30 Jan 2001 14:24:52 GMT'}
{'version': 'v2', 'created': 'Wed, 7 Feb 2001 11:08:43 GMT'}
{'version': 'v3', 'created': 'Mon, 7 May 2001 07:32:49 GMT'}
{'version': 'v4', 'created': 'Fri, 19 Oct 2001 06:06:02 GMT'}]
|
2009-11-07
|
[array(['Haba', 'N.', ''], dtype=object)
array(['Sato', 'J.', ''], dtype=object)
array(['Tanimoto', 'M.', ''], dtype=object)
array(['Yoshioka', 'K.', ''], dtype=object)]
|
16,587 |
1903.01523
|
Xin Liu
|
Xin Liu
|
Well-posedness of the viscous equations with strong stratification
|
This paper has been updated and resubmitted as arXiv:1906.12233. This
original version contains mistake and misinformation
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This is the old version of this project. Please find the new version at
1906.12233.
|
[{'version': 'v1', 'created': 'Mon, 4 Mar 2019 20:18:32 GMT'}
{'version': 'v2', 'created': 'Mon, 1 Jul 2019 14:58:13 GMT'}
{'version': 'v3', 'created': 'Thu, 10 Mar 2022 08:10:38 GMT'}]
|
2022-03-11
|
[array(['Liu', 'Xin', ''], dtype=object)]
|
16,588 |
1809.01651
|
Daniel \'Avila
|
Daniel \'Avila, Leonardo Pati\~no
|
Instability of a magnetized QGP sourced by a scalar operator
|
28 pages, 10 figures. Version accepted for publication on JHEP. We
have extended our discussion about the possible phase transition in section
2. We also added discussion about fixing the renormalization scheme, and
remarked that our conclusions are scheme independent. References added
|
JHEP 04 (2019) 086
|
10.1007/JHEP04(2019)086
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We use the gauge/gravity correspondence to study the thermodynamics of a
magnetized quark-gluon plasma in the presence of a scalar operator of dimension
$\Delta=2$. We proceed by working in a five-dimensional gauged supergravity
theory, where we numerically construct an asymptotically AdS$_5$ background
that describes a black D3-brane in the presence of a magnetic and a scalar
fields. We study the asymptotic behavior of the background and its fields close
to the AdS$_5$ region to latter perform a thermodynamic analysis of the
solution that includes the renormalization of the free energy associated to it.
We find that because of the presence of the scalar operator, there exists a
maximum intensity for the magnetic field that the plasma can hold, while for
any given intensity smaller than that value, there are two states that differ
in their vacuum expectation value for the scalar operator. We show that one of
the two branches just mentioned is thermodynamically favored over the other.
|
[{'version': 'v1', 'created': 'Wed, 5 Sep 2018 17:59:41 GMT'}
{'version': 'v2', 'created': 'Thu, 15 Nov 2018 16:30:57 GMT'}
{'version': 'v3', 'created': 'Tue, 2 Apr 2019 15:51:54 GMT'}]
|
2019-04-23
|
[array(['Ávila', 'Daniel', ''], dtype=object)
array(['Patiño', 'Leonardo', ''], dtype=object)]
|
16,589 |
0709.1345
|
Des Johnston
|
D. A. Johnston, A. Lipowski, Ranasinghe P. K. C. Malmini
|
The Gonihedric Ising Model and Glassiness
|
To appear as Chapter 7 in Rugged Free-Energy Landscapes - An
Introduction, Springer Lecture Notes in Physics, 736, ed. W. Janke, (2008)
| null | null | null |
cond-mat.stat-mech
| null |
The Gonihedric 3D Ising model is a lattice spin model in which planar Peierls
boundaries between + and - spins can be created at zero energy cost. Instead of
weighting the area of Peierls boundaries as the case for the usual 3D Ising
model with nearest neighbour interactions, the edges, or "bends" in an
interface are weighted, a concept which is related to the intrinsic curvature
of the boundaries in the continuum.
In these notes we follow a roughly chronological order by first reviewing the
background to the formulation of the model, before moving on to the elucidation
of the equilibrium phase diagram by various means and then to investigation of
the non-equilibrium, glassy behaviour of the model.
|
[{'version': 'v1', 'created': 'Mon, 10 Sep 2007 15:02:15 GMT'}]
|
2007-09-11
|
[array(['Johnston', 'D. A.', ''], dtype=object)
array(['Lipowski', 'A.', ''], dtype=object)
array(['Malmini', 'Ranasinghe P. K. C.', ''], dtype=object)]
|
16,590 |
1406.5072
|
Rong Du
|
Rong Du, Yun Gao
|
On the Griffiths numbers for higher dimensional singularities
|
to appear in Annales de l'Institut Fourier
| null | null | null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that Yau's conjecture on the inequalities for (n-1)-th Griffiths
number and (n-1)-th Hironaka number does not hold for isolated rigid Gorenstein
singularities of dimension greater than 2. But his conjecture on the inequality
for (n-1)-th Griffiths number is true for irregular singularities.
|
[{'version': 'v1', 'created': 'Thu, 19 Jun 2014 15:08:00 GMT'}]
|
2014-06-20
|
[array(['Du', 'Rong', ''], dtype=object)
array(['Gao', 'Yun', ''], dtype=object)]
|
16,591 |
cond-mat/0504088
|
Ersen Mete
|
R. Shaltaf, E. Mete, S. Ellialtioglu
|
Cs adsorption on Si(001) surface: ab initio study
|
8 pages, 7 figures
|
Phys. Rev. B 72, 205415 (2005)
|
10.1103/PhysRevB.72.205415
| null |
cond-mat.str-el
| null |
First-principles calculations using density functional theory based on
norm-conserving pseudopotentials have been performed to investigate the Cs
adsorption on the Si(001) surface for 0.5 and 1 ML coverages. We found that the
saturation coverage corresponds to 1 ML adsorption with two Cs atoms occupying
the double layer model sites. While the 0.5 ML covered surface is of metallic
nature, we found that 1 ML of Cs adsorption corresponds to saturation coverage
and leads to a semiconducting surface. The results for the electronic behavior
and surface work function suggest that adsorption of Cs takes place via
polarized covalent bonding.
|
[{'version': 'v1', 'created': 'Tue, 5 Apr 2005 12:41:26 GMT'}
{'version': 'v2', 'created': 'Thu, 10 Nov 2005 21:36:55 GMT'}]
|
2007-05-23
|
[array(['Shaltaf', 'R.', ''], dtype=object)
array(['Mete', 'E.', ''], dtype=object)
array(['Ellialtioglu', 'S.', ''], dtype=object)]
|
16,592 |
1303.6749
|
Zheng Cheng
|
Z. Cheng, A. Taani and Y.H. Zhao
|
Impact of accretion on the statistics of neutron star masses
|
2 pages, 2 figures
|
Proceedings of the International Astronomical Union / Volume 8 /
Symposium S290 / August 2012, pp 195-196
|
10.1017/S1743921312019588
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We have collected the parameter of 38 neutron stars (NSs) in binary systems
with spin periods and measured masses. By adopting the Boot-strap method, we
reproduced the procedure of mass calculated for each system separately, to
determine the truly mass distribution of the NS that obtained from observation.
We also applied the Monte-Carlo simulation and introduce the characteristic
spin period 20 ms, in order to distinguish between millisecond pulsars (MSPs)
and less recycled pulsars. The mass distributions of MSPs and the less recycled
pulsars could be fitted by a Gaussian function as $\rm 1.45\pm0.42 M_{\odot}$
and $\rm 1.31\pm0.17 M_{\odot} (\rm with ~ 1\sigma)$ respectively. As such, the
MSP masses are heavier than those in less recycled systems by factor of $\rm
\sim 0.13M_{\odot}$, since the accretion effect during the recycling process.
|
[{'version': 'v1', 'created': 'Wed, 27 Mar 2013 06:31:43 GMT'}]
|
2013-03-28
|
[array(['Cheng', 'Z.', ''], dtype=object)
array(['Taani', 'A.', ''], dtype=object)
array(['Zhao', 'Y. H.', ''], dtype=object)]
|
16,593 |
1301.2822
|
Andrea Bellini
|
A. Bellini (1,2), G. Piotto (2), A. P. Milone (3,4), I. R. King (5),
A. Renzini (6), S. Cassisi (7), J. Anderson (1), L. R. Bedin (6), D.
Nardiello (2), A. Pietrinferni (7), A. Sarajedini (8) ((1) STScI, (2) UNIPD,
(3) IAC, (4) Dip.Astroph. La Laguna, (5) Univ.Washington, (6) INAF-OAPD, (7)
INAF-OATE, (8) Univ.Florida)
|
The intriguing stellar populations in the globular clusters NGC 6388 and
NGC 6441
|
31 pages, 26 figures (some in low res to fit within astroph 15 MB
limit), 7 tables, accepted for publication in the Astrophysical Journal
| null |
10.1088/0004-637X/765/1/32
| null |
astro-ph.SR astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
NGC 6388 and NGC 6441 are two massive Galactic bulge globular clusters which
share many properties, including the presence of an extended horizontal branch
(HB), quite unexpected because of their high metal content. In this paper we
use HST's WFPC2, ACS, and WFC3 images and present a broad multicolor study of
their stellar content, covering all main evolutionary branches. The
color-magnitude diagrams (CMDs) give compelling evidence that both clusters
host at least two stellar populations, which manifest themselves in different
ways. NGC 6388 has a broadened main sequence (MS), a split sub-giant branch
(SGB), and a split red giant branch (RGB) that becomes evident above the HB in
our data set; its red HB is also split into two branches. NGC 6441 has a split
MS, but only an indication of two SGB populations, while the RGB clearly splits
in two from the SGB level upward, and no red HB structure. The multicolor
analysis of the CMDs confirms that the He difference between the two main
stellar populations in the two clusters must be similar. This is
observationally supported by the HB morphology, but also confirmed by the color
distribution of the stars in the MS optical band CMDs. However, a MS split
becomes evident in NGC 6441 using UV colors, but not in NGC 6388, indicating
that the chemical patterns of the different populations are different in the
two clusters, with C, N, O abundance differences likely playing a major role.
We also analyze the radial distribution of the two populations.
|
[{'version': 'v1', 'created': 'Sun, 13 Jan 2013 21:00:00 GMT'}]
|
2015-06-12
|
[array(['Bellini', 'A.', ''], dtype=object)
array(['Piotto', 'G.', ''], dtype=object)
array(['Milone', 'A. P.', ''], dtype=object)
array(['King', 'I. R.', ''], dtype=object)
array(['Renzini', 'A.', ''], dtype=object)
array(['Cassisi', 'S.', ''], dtype=object)
array(['Anderson', 'J.', ''], dtype=object)
array(['Bedin', 'L. R.', ''], dtype=object)
array(['Nardiello', 'D.', ''], dtype=object)
array(['Pietrinferni', 'A.', ''], dtype=object)
array(['Sarajedini', 'A.', ''], dtype=object)]
|
16,594 |
0709.2411
|
Mihail Chizhov
|
Mihail V. Chizhov
|
The ILC Energy Requirements from the Constraints on New Boson Production
at the Tevatron
|
6 pages, 5 figures, talk given at the LCWS/ILC 2007 workshop
|
ECONF C0705302:TEV09,2007
| null | null |
hep-ph
| null |
Direct constraints on the masses of new heavy bosons by the Tevatron data are
discussed. Some excesses in the experimental data are interpreted as a
resonance production of new charged and `leptophobic' neutral chiral bosons
with masses around 500 GeV and 700 GeV, respectively. The interpretation was
provided on the basis of the theoretical model, proposed by the author about 15
years ago. New Tevatron data and the LHC results will definitely confirm or
reject this interpretation. The ILC with an energy above 1 TeV would be an
ideal place to produce and to study the properties of these particles.
|
[{'version': 'v1', 'created': 'Sat, 15 Sep 2007 08:36:22 GMT'}]
|
2009-02-16
|
[array(['Chizhov', 'Mihail V.', ''], dtype=object)]
|
16,595 |
1209.5980
|
Paul A. Wiegert
|
Paul A. Wiegert, Peter G. Brown, Robert J. Weryk and Daniel K. Wong
|
The return of the Andromedids meteor shower
|
submitted to the Astronomical Journal Sep 22 2012
| null |
10.1088/0004-6256/145/3/70
| null |
astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Andromedid meteor shower underwent spectacular outbursts in 1872 and
1885, producing thousands of visual meteors per hour and described as `stars
fell like rain' in Chinese records of the time. The shower originates from
comet 3D/Biela whose disintegration in the mid-1800's is linked to the
outbursts, but the shower has been weak or absent since the late 19th Century.
This shower returned in December 2011 with a zenithal hourly rate of
approximately 50, the strongest return in over a hundred years. Some 122
probable Andromedid orbits were detected by the Canadian Meteor Orbit Radar.
The shower outburst occurred during 2011 Dec 3-5. The radiant at RA
+$18\degree$ and Dec +$56\degree$ is typical of the `classical' Andromedids of
the early 1800's, whose radiant was actually in Cassiopeia. The orbital
elements indicate that the material involved was released before 3D/Biela's
breakup prior to 1846. The observed shower in 2011 had a slow geocentric speed
(16 km s$^{-1}$) and was comprised of small particles: the mean measured mass
from the radar is $\sim5 \times 10^{-7}$ kg corresponding to radii of 0.5 mm at
a bulk density of 1000 kg/m$^3$.
Numerical simulations of the parent comet indicate that the meteoroids of the
2011 return of the Andromedids shower were primarily ejected during 3D/Biela's
1649 perihelion passage. The orbital characteristics, radiant, timing as well
as the absence of large particles in the streamlet are all consistent with
simulations. Predictions are made regarding other appearances of the shower in
the years 2000-2047 based on our numerical model. We note that the details of
the 2011 return can, in principle, be used to better constrain the orbit of
3D/Biela prior to the comets first recorded return in 1772.
|
[{'version': 'v1', 'created': 'Wed, 26 Sep 2012 15:52:02 GMT'}]
|
2015-06-11
|
[array(['Wiegert', 'Paul A.', ''], dtype=object)
array(['Brown', 'Peter G.', ''], dtype=object)
array(['Weryk', 'Robert J.', ''], dtype=object)
array(['Wong', 'Daniel K.', ''], dtype=object)]
|
16,596 |
1101.0670
|
Kang Young Lee
|
Sanghyeon Chang, Kang Young Lee, Jeonghyeon Song
|
The second Kaluza-Klein neutral Higgs bosons in the minimal Universal
Extra Dimension model
|
22 pages, 7 figures
|
Phys. Lett. B 708 (2012) 144
|
10.1016/j.physletb.2012.01.047
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Loop-induced decay of a neutral Higgs boson into a pair of gluons or photons
has great implications for the Higgs discovery at the LHC. If the Higgs boson
is heavy with mass above $\sim 500\gev$, however, these radiative branching
ratios are very suppressed in the standard model (SM), as the new decay
channels are kinematically open. We note that these radiative decays can be
sizable for the heavy CP-odd second Kaluza-Klein (KK) mode of the Higgs boson,
$\chi^\tw$, in the minimal universal extra dimension model: highly degenerate
mass spectrum of the theory prohibits kinematically the dominant
KK-number-conserving decays into the first KK modes of the $W$, $Z$ and top
quark. We find that the CP-even decay of $h^{(2)} \to g g$ is absent at
one-loop level since $h^{(2)}$ couples with different mass eigenstates of
$t_{1,2}^\on$ while a gluon does with the same mass eigenstates. The $h^\tw$
production at the LHC is very suppressed. On the contrary, the process $ gg \to
\chi^\tw \to \gamma\gamma$ in an optimal scenario can be observed with
manageable SM backgrounds at the LHC.
|
[{'version': 'v1', 'created': 'Tue, 4 Jan 2011 08:07:10 GMT'}
{'version': 'v2', 'created': 'Tue, 18 Jan 2011 06:02:57 GMT'}
{'version': 'v3', 'created': 'Fri, 10 Jun 2011 08:34:24 GMT'}]
|
2012-03-13
|
[array(['Chang', 'Sanghyeon', ''], dtype=object)
array(['Lee', 'Kang Young', ''], dtype=object)
array(['Song', 'Jeonghyeon', ''], dtype=object)]
|
16,597 |
1710.01165
|
Vsevolod Gubarev
|
Vsevolod Gubarev
|
Universal enveloping commutative Rota-Baxter algebras of precommutative
and postcommutative algebras
|
17 p. arXiv admin note: text overlap with arXiv:1708.00168
|
Axioms. Special issue Hopf Algebras, Quantum Groups and
Yang-Baxter Equations. 2017. Vol. 6, no. 4, 33
|
10.3390/axioms6040033
| null |
math.RA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Universal enveloping commutative Rota-Baxter algebras of pre- and
postcommutative algebras are constructed. We prove that the pair of varieties
(commutative Rota-Baxter algebras of nonzero weight,postcommutative algebras)
is a PBW-pair and the pair (commutative Rota-Baxter algebras of zero
weight,precommutative algebras) is not.
|
[{'version': 'v1', 'created': 'Mon, 2 Oct 2017 05:10:49 GMT'}]
|
2018-01-23
|
[array(['Gubarev', 'Vsevolod', ''], dtype=object)]
|
16,598 |
2304.10663
|
Xiaolin Hu
|
Xiaolin Hu
|
Meta Semantics: Towards better natural language understanding and
reasoning
|
10 pages, 8 figures, 2 tables
| null | null | null |
cs.CL cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Natural language understanding is one of the most challenging topics in
artificial intelligence. Deep neural network methods, particularly large
language module (LLM) methods such as ChatGPT and GPT-3, have powerful
flexibility to adopt informal text but are weak on logical deduction and suffer
from the out-of-vocabulary (OOV) problem. On the other hand, rule-based methods
such as Mathematica, Semantic web, and Lean, are excellent in reasoning but
cannot handle the complex and changeable informal text. Inspired by pragmatics
and structuralism, we propose two strategies to solve the OOV problem and a
semantic model for better natural language understanding and reasoning.
|
[{'version': 'v1', 'created': 'Thu, 20 Apr 2023 22:16:16 GMT'}]
|
2023-04-24
|
[array(['Hu', 'Xiaolin', ''], dtype=object)]
|
16,599 |
1912.00370
|
Mahdi Abolghasemi
|
Mahdi Abolghasemi, Rob J Hyndman, Garth Tarr, Christoph Bergmeir
|
Machine learning applications in time series hierarchical forecasting
| null | null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Hierarchical forecasting (HF) is needed in many situations in the supply
chain (SC) because managers often need different levels of forecasts at
different levels of SC to make a decision. Top-Down (TD), Bottom-Up (BU) and
Optimal Combination (COM) are common HF models. These approaches are static and
often ignore the dynamics of the series while disaggregating them.
Consequently, they may fail to perform well if the investigated group of time
series are subject to large changes such as during the periods of promotional
sales. We address the HF problem of predicting real-world sales time series
that are highly impacted by promotion. We use three machine learning (ML)
models to capture sales variations over time. Artificial neural networks (ANN),
extreme gradient boosting (XGboost), and support vector regression (SVR)
algorithms are used to estimate the proportions of lower-level time series from
the upper level. We perform an in-depth analysis of 61 groups of time series
with different volatilities and show that ML models are competitive and
outperform some well-established models in the literature.
|
[{'version': 'v1', 'created': 'Sun, 1 Dec 2019 09:49:42 GMT'}]
|
2019-12-03
|
[array(['Abolghasemi', 'Mahdi', ''], dtype=object)
array(['Hyndman', 'Rob J', ''], dtype=object)
array(['Tarr', 'Garth', ''], dtype=object)
array(['Bergmeir', 'Christoph', ''], dtype=object)]
|
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