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|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
4,300 |
1209.6201
|
Ronald du Puits
|
Ronald du Puits, Johannes Rilk, Christian Resagk, Andr\'e Thess
|
Boundary layers in turbulent Rayleigh-B\'enard convection in air
|
two pages, one full size video, one reduced size video
| null | null | null |
physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The boundary layer flow in a Rayleigh-B\'enard convection cell of rectangular
shape has been visualized in this fluid dynamics video. The experiment has been
undertaken in air at a Rayleigh number $Ra=1.3\times 10^{10}$ and a Prandtl
number $Pr=0.7$. Various sequences captured at selected positions of the
heating plate show that the boundary layer is a very transient flow region
characterized by coherent structures that permanently evolve. It becomes fully
turbulent in the areas where the large-scale circulation impinge or leave the
bottom plate.
|
[{'version': 'v1', 'created': 'Thu, 27 Sep 2012 12:12:00 GMT'}]
|
2012-09-28
|
[array(['Puits', 'Ronald du', ''], dtype=object)
array(['Rilk', 'Johannes', ''], dtype=object)
array(['Resagk', 'Christian', ''], dtype=object)
array(['Thess', 'André', ''], dtype=object)]
|
4,301 |
1812.08692
|
Jan Draisma
|
Guus P. Bollen, Dustin Cartwright, Jan Draisma
|
Matroids over one-dimensional groups
|
29 pages, 4 diagrams, 2 pictures, improved exposition---many thanks
to referees!
|
Int. Math. Res. Not., 2022:3, 2298-2336
|
10.1093/imrn/rnaa175
| null |
math.CO math.AG math.RA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We develop the theory of matroids over one-dimensional algebraic groups, with
special emphasis on positive characteristic. In particular, we compute the
Lindstr\"om valuations and Frobenius flocks of such matroids. Building on work
by Evans and Hrushovski, we show that the class of algebraic matroids, paired
with their Lindstr\"om valuations, is not closed under duality of valuated
matroids.
|
[{'version': 'v1', 'created': 'Thu, 20 Dec 2018 16:51:45 GMT'}
{'version': 'v2', 'created': 'Wed, 18 Mar 2020 14:14:17 GMT'}]
|
2023-01-10
|
[array(['Bollen', 'Guus P.', ''], dtype=object)
array(['Cartwright', 'Dustin', ''], dtype=object)
array(['Draisma', 'Jan', ''], dtype=object)]
|
4,302 |
2302.07643
|
Jihong Park
|
Jinho Choi, Jihong Park, Abhinav Japesh, Adarsh
|
A Subspace Projection Approach to Autoencoder-based Anomaly Detection
|
5 pages, submitted to the IEEE for possible publication
| null | null | null |
cs.LG cs.IT math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Autoencoder (AE) is a neural network (NN) architecture that is trained to
reconstruct an input at its output. By measuring the reconstruction errors of
new input samples, AE can detect anomalous samples deviated from the trained
data distribution. The key to success is to achieve high-fidelity
reconstruction (HFR) while restricting AE's capability of generalization beyond
training data, which should be balanced commonly via iterative re-training.
Alternatively, we propose a novel framework of AE-based anomaly detection,
coined HFR-AE, by projecting new inputs into a subspace wherein the trained AE
achieves HFR, thereby increasing the gap between normal and anomalous sample
reconstruction errors. Simulation results corroborate that HFR-AE improves the
area under receiver operating characteristic curve (AUROC) under different AE
architectures and settings by up to 13.4% compared to Vanilla AE-based anomaly
detection.
|
[{'version': 'v1', 'created': 'Wed, 15 Feb 2023 13:23:09 GMT'}]
|
2023-02-16
|
[array(['Choi', 'Jinho', ''], dtype=object)
array(['Park', 'Jihong', ''], dtype=object)
array(['Japesh', 'Abhinav', ''], dtype=object)
array(['Adarsh', '', ''], dtype=object)]
|
4,303 |
1901.10910
|
Mohammad Mohammadi
|
Mohammad. Mohammadi, Rohollah. Gheisari
|
Zero Rest Mass Soliton Solutions
| null | null |
10.1088/1402-4896/ab2c7b
| null |
physics.class-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, extended Klein-Gordon field systems will be introduced.
Theoretically, it will be shown that for a special example of these systems, it
is possible to have a single zero rest mass soliton solution, which is forced
to move at the speed of light provided it is considered a non-deformed rigid
object. This special soliton solution has the minimum energy among the other
solutions, i.e. any arbitrary deformation in its internal structure leads to an
increase in the total energy.
|
[{'version': 'v1', 'created': 'Tue, 29 Jan 2019 18:40:23 GMT'}
{'version': 'v2', 'created': 'Sat, 15 Jun 2019 22:37:28 GMT'}
{'version': 'v3', 'created': 'Wed, 28 Aug 2019 03:28:55 GMT'}
{'version': 'v4', 'created': 'Tue, 15 Oct 2019 07:08:12 GMT'}
{'version': 'v5', 'created': 'Fri, 25 Oct 2019 17:53:42 GMT'}]
|
2019-10-28
|
[array(['Mohammadi', 'Mohammad.', ''], dtype=object)
array(['Gheisari', 'Rohollah.', ''], dtype=object)]
|
4,304 |
astro-ph/0211507
|
Charles J. Lada
|
Charles J. Lada, Edwin A. Bergin, Joao F. Alves and Tracy L. Huard
|
The Dynamical State of Barnard 68: A Thermally Supported, Pulsating Dark
Cloud
|
To appear in the Astrophysical Journal; 23 pages, 8 figures;
Manuscript and higher resolution images can be obtained at
http://cfa-www.harvard.edu/~ebergin/pubs_html/b68_vel.html
|
Astrophys.J. 586 (2003) 286-295
|
10.1086/367610
| null |
astro-ph
| null |
We report sensitive, high resolution molecular-line observations of the dark
cloud Barnard 68 obtained with the IRAM 30-m telescope. We analyze
spectral-line observations of C18O, CS(2--1), C34S(2--1), and N2H+(1--0) in
order to investigate the kinematics and dynamical state of the cloud. We find
extremely narrow linewidths in the central regions of the cloud. These narrow
lines are consistent with thermally broadened profiles for the measured gas
temperature of 10.5 K. We determine the thermal pressure to be a factor 4 -- 5
times greater than the non-thermal (turbulent) pressure in the central regions
of the cloud, indicating that thermal pressure is the primary source of support
against gravity in this cloud. This confirms the inference of a thermally
supported cloud drawn previously from deep infrared extinction measurements.
The rotational kinetic energy is found to be only a few percent of the
gravitational potential energy, indicating that the contribution of rotation to
the overall stability of the cloud is insignificant. Finally, our observations
show that CS line is optically thick and self-reversed across nearly the entire
projected surface of the cloud. The shapes of the self-reversed profiles are
asymmetric and are found to vary across the cloud in such a manner that the
presence of both inward and outward motions are observed within the cloud.
Moreover, these motions appear to be globally organized in a clear and
systematic alternating spatial pattern which is suggestive of a small
amplitude, non-radial oscillation or pulsation of the outer layers of the cloud
about an equilibrium configuration.
|
[{'version': 'v1', 'created': 'Fri, 22 Nov 2002 20:36:22 GMT'}
{'version': 'v2', 'created': 'Mon, 25 Nov 2002 16:29:36 GMT'}]
|
2009-11-07
|
[array(['Lada', 'Charles J.', ''], dtype=object)
array(['Bergin', 'Edwin A.', ''], dtype=object)
array(['Alves', 'Joao F.', ''], dtype=object)
array(['Huard', 'Tracy L.', ''], dtype=object)]
|
4,305 |
0902.4220
|
Dan Clemens
|
Dan Clemens, B.-G. Andersson, Andy Adamson, David Axon, James De
Buizer, Alberto Cellino, Dean C. Hines, Jennifer L. Hoffman, Terry Jay Jones,
Alexander Lazarian, Antonio Mario Magalhaes, Joseph Masiero, Chris Packham,
Marshall Perrin, Claudia Vilega Rodrigues, Hiroko Shinnaga, William Sparks,
John Vaillancourt, Doug Whittet
|
O/IR Polarimetry for the 2010 Decade (PSF): Science at the Edge, Sharp
Tools for All
|
White Paper to the Planetary Systems and Star Formation (PSF) Science
Frontiers Panel of the Astro2010 Decadal Survey
| null | null | null |
astro-ph.SR astro-ph.EP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Science opportunities and recommendations concerning optical/infrared
polarimetry for the upcoming decade in the fields of planetary systems and star
formation. Community-based White Paper to Astro2010 in response to the call for
such papers.
|
[{'version': 'v1', 'created': 'Tue, 24 Feb 2009 19:28:25 GMT'}]
|
2009-02-25
|
[array(['Clemens', 'Dan', ''], dtype=object)
array(['Andersson', 'B. -G.', ''], dtype=object)
array(['Adamson', 'Andy', ''], dtype=object)
array(['Axon', 'David', ''], dtype=object)
array(['De Buizer', 'James', ''], dtype=object)
array(['Cellino', 'Alberto', ''], dtype=object)
array(['Hines', 'Dean C.', ''], dtype=object)
array(['Hoffman', 'Jennifer L.', ''], dtype=object)
array(['Jones', 'Terry Jay', ''], dtype=object)
array(['Lazarian', 'Alexander', ''], dtype=object)
array(['Magalhaes', 'Antonio Mario', ''], dtype=object)
array(['Masiero', 'Joseph', ''], dtype=object)
array(['Packham', 'Chris', ''], dtype=object)
array(['Perrin', 'Marshall', ''], dtype=object)
array(['Rodrigues', 'Claudia Vilega', ''], dtype=object)
array(['Shinnaga', 'Hiroko', ''], dtype=object)
array(['Sparks', 'William', ''], dtype=object)
array(['Vaillancourt', 'John', ''], dtype=object)
array(['Whittet', 'Doug', ''], dtype=object)]
|
4,306 |
2004.05540
|
Jiayi Zhang
|
Yan Zhang, Jiayi Zhang, Liang Yang, Bo Ai, Mohamed-Slim Alouini
|
On the Performance of Dual-Hop Systems over Mixed FSO/mmWave Fading
Channels
|
to appear in IEEE OJCOMS
| null | null | null |
cs.IT eess.SP math.IT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Free-space optical (FSO) links are considered as a cost-efficient way to fill
the backhaul/fronthaul connectivity gap between millimeter wave (mmWave) access
networks and optical fiber based central networks. In this paper, we
investigate the end-to-end performance of dual-hop mixed FSO/mmWave systems to
address this combined use. The FSO link is modeled as a Gamma-Gamma fading
channel using both heterodyne detection and indirect modulation/direct
detection with pointing error impairments, while the mmWave link experiences
the fluctuating two-ray fading. Under the assumption of both
amplify-and-forward and decode-and-forward relaying, we derive novel
closed-form expressions for the outage probability, average bit error
probability (BER), ergodic capacity, effective capacity in terms of bivariate
Fox's $H$-functions. Additionally, we discuss the diversity gain and provide
other important engineering insights based on the high signal-to-noise-ratio
analysis of the outage probability and the average BER. Finally, all our
analytical results are verified using Monte Carlo simulations.
|
[{'version': 'v1', 'created': 'Sun, 12 Apr 2020 04:04:16 GMT'}]
|
2020-04-14
|
[array(['Zhang', 'Yan', ''], dtype=object)
array(['Zhang', 'Jiayi', ''], dtype=object)
array(['Yang', 'Liang', ''], dtype=object)
array(['Ai', 'Bo', ''], dtype=object)
array(['Alouini', 'Mohamed-Slim', ''], dtype=object)]
|
4,307 |
2001.06698
|
Natalia Chepiga
|
Natalia Chepiga, Fr\'ed\'eric Mila
|
Kibble-Zurek exponent and chiral transition of the period-4 phase of
Rydberg chains
|
10 pages, 10 figures + supplemental material
| null |
10.1038/s41467-020-20641-y
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Chains of Rydberg atoms have emerged as an amazing playground to study
quantum physics in 1D. Playing with inter-atomic distances and laser detuning,
one can in particular explore the commensurate-incommensurate transition out of
charge-density waves through the Kibble-Zurek mechanism, and the possible
presence of a chiral transition with dynamical exponent $z>1$. Here we address
this problem theoretically with effective blockade models where the
short-distance repulsions are replaced by a constraint of no double occupancy.
For the period-4 phase, we show there is an Ashkin-Teller transition point with
exponent $\nu=0.78$ surrounded by a direct chiral transition with a dynamical
exponent $z=1.14$ and a Kibble-Zurek exponent $\mu=0.4$. For Rydberg atoms with
a van der Waals potential, we suggest that the experimental value $\mu=0.25$ is
due to a chiral transition with $z\simeq 1.9$ and $\nu\simeq 0.47$ surrounding
an Ashkin-Teller transition close to the 4-state Potts universality.
|
[{'version': 'v1', 'created': 'Sat, 18 Jan 2020 16:22:53 GMT'}
{'version': 'v2', 'created': 'Wed, 26 Aug 2020 09:46:27 GMT'}]
|
2021-01-20
|
[array(['Chepiga', 'Natalia', ''], dtype=object)
array(['Mila', 'Frédéric', ''], dtype=object)]
|
4,308 |
1807.10088
|
Sebastian Lutz
|
Sebastian Lutz, Konstantinos Amplianitis, Aljosa Smolic
|
AlphaGAN: Generative adversarial networks for natural image matting
|
Accepted at BMVC 2018
| null | null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present the first generative adversarial network (GAN) for natural image
matting. Our novel generator network is trained to predict visually appealing
alphas with the addition of the adversarial loss from the discriminator that is
trained to classify well-composited images. Further, we improve existing
encoder-decoder architectures to better deal with the spatial localization
issues inherited in convolutional neural networks (CNN) by using dilated
convolutions to capture global context information without downscaling feature
maps and losing spatial information. We present state-of-the-art results on the
alphamatting online benchmark for the gradient error and give comparable
results in others. Our method is particularly well suited for fine structures
like hair, which is of great importance in practical matting applications, e.g.
in film/TV production.
|
[{'version': 'v1', 'created': 'Thu, 26 Jul 2018 12:17:22 GMT'}]
|
2018-07-27
|
[array(['Lutz', 'Sebastian', ''], dtype=object)
array(['Amplianitis', 'Konstantinos', ''], dtype=object)
array(['Smolic', 'Aljosa', ''], dtype=object)]
|
4,309 |
gr-qc/0202079
|
Carlo Rovelli
|
Carlo Rovelli
|
A note on the foundation of relativistic mechanics. II: Covariant
hamiltonian general relativity
|
7 pages, no figures, 2nd part of gr-qc/0111037
| null | null | null |
gr-qc
| null |
I illustrate a simple hamiltonian formulation of general relativity, derived
from the work of Esposito, Gionti and Stornaiolo, which is manifestly 4d
generally covariant and is defined over a finite dimensional space. The
spacetime coordinates drop out of the formalism, reflecting the fact that they
are not related to observability. The formulation can be interpreted in terms
of Toller's reference system transformations, and provides a physical
interpretation for the spinnetwork to spinnetwork transition amplitudes
computable in principle in loop quantum gravity and in the spin foam models.
|
[{'version': 'v1', 'created': 'Thu, 21 Feb 2002 16:20:22 GMT'}]
|
2007-05-23
|
[array(['Rovelli', 'Carlo', ''], dtype=object)]
|
4,310 |
2003.05000
|
Tao Gu
|
Zheng Yang, Bin Xu, Jingyao Dai, Tao Gu
|
PAS: Prediction-based Adaptive Sleeping for Environment Monitoring in
Sensor Networks
| null | null | null | null |
cs.DC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Energy efficiency has proven to be an important factor dominating the working
period of WSN surveillance systems. Intensive studies have been done to provide
energy efficient power management mechanisms. In this paper, we present PAS, a
Prediction-based Adaptive Sleeping mechanism for environment monitoring sensor
networks to conserve energy. PAS focuses on the diffusion stimulus (DS)
scenario, which is very common and important in the application of environment
monitoring. Different with most of previous works, PAS explores the features of
DS spreading process to obtain higher energy efficiency. In PAS, sensors
determine their sleeping schedules based on the observed emergency of DS
spreading. While sensors near the DS boundary stay awake to accurately capture
the possible stimulus arrival, the far away sensors turn into sleeping mode to
conserve energy. Simulation experiment shows that PAS largely reduces the
energy cost without decreasing system performance
|
[{'version': 'v1', 'created': 'Fri, 6 Mar 2020 12:52:36 GMT'}]
|
2020-03-12
|
[array(['Yang', 'Zheng', ''], dtype=object)
array(['Xu', 'Bin', ''], dtype=object)
array(['Dai', 'Jingyao', ''], dtype=object)
array(['Gu', 'Tao', ''], dtype=object)]
|
4,311 |
0711.4418
|
Nicholas Peter Robins
|
N. P. Robins, C. Figl, M. Jeppesen, G. R. Dennis and J. D. Close
|
A pumped atom laser
|
Version 2 contains 18 pages and 4 figures. We have significantly
rewritten the introduction, as well as including a discussion of Rayleigh and
Raman superradiant scattering and how these relate to continuous pumping of
an atom laser. Five new references were added
| null |
10.1038/nphys1027
| null |
physics.atom-ph
| null |
We present the experimental realization of a pumped atom laser. We
demonstrate the pumping through measurements of the source and laser-mode atom
numbers, making a rate equation study of the pumping process.
|
[{'version': 'v1', 'created': 'Wed, 28 Nov 2007 05:23:47 GMT'}
{'version': 'v2', 'created': 'Tue, 12 Feb 2008 03:12:29 GMT'}]
|
2009-11-13
|
[array(['Robins', 'N. P.', ''], dtype=object)
array(['Figl', 'C.', ''], dtype=object)
array(['Jeppesen', 'M.', ''], dtype=object)
array(['Dennis', 'G. R.', ''], dtype=object)
array(['Close', 'J. D.', ''], dtype=object)]
|
4,312 |
0811.3584
|
Michael Ham
|
Michael I. Ham, Vadas Gintautas, Marko A. Rodriguez, Ryan A. Bennett,
Cara L. Santa Maria, Luis M.A. Bettencourt
|
Density-dependence of functional development in spiking cortical
networks grown in vitro
|
10 pages, 7 figures
|
Biological Cybernetics 102(1): 71-80 (2010)
|
10.1007/s00422-009-0351-4
| null |
q-bio.NC q-bio.QM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
During development, the mammalian brain differentiates into specialized
regions with distinct functional abilities. While many factors contribute to
functional specialization, we explore the effect of neuronal density on the
development of neuronal interactions in vitro. Two types of cortical networks,
dense and sparse, with 50,000 and 12,000 total cells respectively, are studied.
Activation graphs that represent pairwise neuronal interactions are constructed
using a competitive first response model. These graphs reveal that, during
development in vitro, dense networks form activation connections earlier than
sparse networks. Link entropy analysis of dense net- work activation graphs
suggests that the majority of connections between electrodes are reciprocal in
nature. Information theoretic measures reveal that early functional information
interactions (among 3 cells) are synergetic in both dense and sparse networks.
However, during later stages of development, previously synergetic
relationships become primarily redundant in dense, but not in sparse networks.
Large link entropy values in the activation graph are related to the domination
of redundant ensembles in late stages of development in dense networks. Results
demonstrate differences between dense and sparse networks in terms of
informational groups, pairwise relationships, and activation graphs. These
differences suggest that variations in cell density may result in different
functional specialization of nervous system tissue in vivo.
|
[{'version': 'v1', 'created': 'Fri, 21 Nov 2008 17:19:17 GMT'}]
|
2010-04-14
|
[array(['Ham', 'Michael I.', ''], dtype=object)
array(['Gintautas', 'Vadas', ''], dtype=object)
array(['Rodriguez', 'Marko A.', ''], dtype=object)
array(['Bennett', 'Ryan A.', ''], dtype=object)
array(['Maria', 'Cara L. Santa', ''], dtype=object)
array(['Bettencourt', 'Luis M. A.', ''], dtype=object)]
|
4,313 |
1107.4248
|
Jorge Segovia
|
J. Segovia, C. Albertus, D. R. Entem, F. Fern\'andez, E. Hern\'andez
and M. A. P\'erez-Garc\'ia
|
Semileptonic $B$ and $B_{s}$ decays into orbitally excited charmed
mesons
|
Physical Review D 84, 094029 (2011). 20 pages, 9 figures
|
Physical Review D 84, 094029 (2011)
|
10.1103/PhysRevD.84.094029
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The BaBar Collaboration has recently reported products of branching fractions
that include $B$ meson semileptonic decays into final states with charged and
neutral $D_{1}(2420)$ and $D_{2}^{\ast}(2460)$, two narrow orbitally excited
charmed mesons. We evaluate these branching fractions, together with those
concerning $D_{0}^{\ast}(2400)$ and $D_{1}'(2430)$ mesons, within the framework
of a constituent quark model. The calculation is performed in two steps, one of
which involves a semileptonic decay and the other is mediated by a strong
process. Our results are in agreement with the experimental data. We also
extend the study to semileptonic decays of $B_{s}$ into orbitally excited
charmed-strange mesons, providing predictions to the possible measurements to
be carried out at LHC.
|
[{'version': 'v1', 'created': 'Thu, 21 Jul 2011 12:15:04 GMT'}
{'version': 'v2', 'created': 'Fri, 16 Sep 2011 10:41:21 GMT'}
{'version': 'v3', 'created': 'Wed, 30 Nov 2011 18:16:24 GMT'}]
|
2011-12-01
|
[array(['Segovia', 'J.', ''], dtype=object)
array(['Albertus', 'C.', ''], dtype=object)
array(['Entem', 'D. R.', ''], dtype=object)
array(['Fernández', 'F.', ''], dtype=object)
array(['Hernández', 'E.', ''], dtype=object)
array(['Pérez-García', 'M. A.', ''], dtype=object)]
|
4,314 |
hep-th/0609057
|
Hongbo Cheng
|
Hongbo Cheng
|
On the Casimir effect for parallel plates in the spacetime with one
extra compactified dimension
|
7 pages, 3 figures
|
Mod.Phys.Lett.A21:1957-1963,2006
|
10.1142/S0217732306019931
| null |
hep-th
| null |
In this paper, the Casimir effect for parallel plates in the presence of one
compactified universal extra dimension is reexamined in detail. Having
regularized the expressions of Casimir force, we show that the nature of
Casimir force is repulsive if the distance between the plates is large enough,
which is disagree with the experimental phenomena.
|
[{'version': 'v1', 'created': 'Fri, 8 Sep 2006 07:48:04 GMT'}]
|
2009-11-11
|
[array(['Cheng', 'Hongbo', ''], dtype=object)]
|
4,315 |
1708.02891
|
G\"unter Rote
|
Jean-Philippe Labb\'e, G\"unter Rote, G\"unter M. Ziegler
|
Area difference bounds for dissections of a square into an odd number of
triangles
|
32 pages, 22 figures. Version v1: Sections 3.1-3.3 have been
restructured; a new Section 8 on even dissections has been added. Version v2
includes a correction in Section 7.5 that was not completely carried out in
the journal version
|
Experimental Mathematics, 29:3 (2020), 253-275
|
10.1080/10586458.2018.1459961
| null |
math.MG math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Monsky's theorem from 1970 states that a square cannot be dissected into an
odd number of triangles of the same area, but it does not give a lower bound
for the area differences that must occur.
We extend Monsky's theorem to "constrained framed maps"; based on this we can
apply a gap theorem from semi-algebraic geometry to a polynomial area
difference measure and thus get a lower bound for the area differences that
decreases doubly-exponentially with the number of triangles. On the other hand,
we obtain the first superpolynomial upper bounds for this problem, derived from
an explicit construction that uses the Thue-Morse sequence.
|
[{'version': 'v1', 'created': 'Wed, 9 Aug 2017 16:12:05 GMT'}
{'version': 'v2', 'created': 'Tue, 3 Apr 2018 17:12:04 GMT'}
{'version': 'v3', 'created': 'Wed, 6 Jun 2018 12:16:16 GMT'}]
|
2021-05-11
|
[array(['Labbé', 'Jean-Philippe', ''], dtype=object)
array(['Rote', 'Günter', ''], dtype=object)
array(['Ziegler', 'Günter M.', ''], dtype=object)]
|
4,316 |
0904.3412
|
Hrvoje Nikolic
|
H. Nikolic
|
Horava-Lifshitz gravity, absolute time, and objective particles in
curved space
|
8 pages, revised, new references, to appear in Mod. Phys. Lett. A
|
Mod.Phys.Lett.A25:1595-1601,2010
|
10.1142/S0217732310033359
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently, Horava formulated a renormalizable theory of quantum gravity that
reduces to general relativity at large distances but violates Lorentz
invariance at small distances. The absolute time involved in this theory allows
to define an objective notion of particles associated with quantization of
fields in classical gravitational backgrounds. The Unruh effect and other
observer-dependent notions of particles in curved space are interpreted as
effects caused by interaction between the objective vacuum and the measuring
apparatus made up of objective particles.
|
[{'version': 'v1', 'created': 'Wed, 22 Apr 2009 09:32:11 GMT'}
{'version': 'v2', 'created': 'Mon, 12 Apr 2010 10:40:57 GMT'}]
|
2014-11-18
|
[array(['Nikolic', 'H.', ''], dtype=object)]
|
4,317 |
1911.04100
|
Mengting Liu
|
Mengting Liu, Di Li, Marko Krco, Luis C. Ho, Duo Xu, and Huixian Li
|
Numerical Simulation and Completeness Survey of Bubbles in the Taurus
and Perseus Molecular Clouds
|
13 pages, 8 figures
|
The Astrophysical Journal, Volume 885, Issue 2, article id. 124,
13 pp. (2019)
|
10.3847/1538-4357/ab4880
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Previous studies have analyzed the energy injection into the interstellar
matter due to molecular bubbles. They found that the total kinetic energies of
bubbles are comparable to, or even larger than, those of outflows but still
less than the gravitational potential and turbulence energies of the hosting
clouds. We examined the possibility that previous studies underestimated the
energy injection due to being unable to detect dim or incomplete bubbles. We
simulated typical molecular bubbles and inserted them into the $^{13}$CO Five
College Radio Astronomical Observatory maps of the Taurus and Perseus Molecular
Clouds. We determined bubble identification completeness by applying the same
procedures to both simulated and real data sets. We proposed a detectability
function for both the Taurus and Perseus molecular clouds based on a
multivariate approach. In Taurus, bubbles with kinetic energy less than ~$1
\times 10^{44}$ erg are likely to be missed. We found that the total missing
kinetic energy in Taurus is less than a couple of $10^{44}$ erg, which only
accounts for around 0.2% of the total kinetic energy of identified bubbles. In
Perseus, bubbles with kinetic energy less than ~$2 \times 10^{44}$ erg are
likely to be missed. We found that the total missing kinetic energy in Perseus
is less than $10^{45}$ erg, which only accounts for around 1% of the total
kinetic energy of identified bubbles. We thus conclude that previous manual
bubble identification routines used in Taurus and Perseus can be considered to
be energetically complete. Therefore, we confirm that energy injection from
dynamic structures, namely outflows and bubbles, produced by star formation
feedback are sufficient to sustain turbulence at a spatial scale from ~0.1 to
~2.8 pc.
|
[{'version': 'v1', 'created': 'Mon, 11 Nov 2019 06:28:18 GMT'}]
|
2019-11-12
|
[array(['Liu', 'Mengting', ''], dtype=object)
array(['Li', 'Di', ''], dtype=object)
array(['Krco', 'Marko', ''], dtype=object)
array(['Ho', 'Luis C.', ''], dtype=object)
array(['Xu', 'Duo', ''], dtype=object)
array(['Li', 'Huixian', ''], dtype=object)]
|
4,318 |
hep-ph/0002094
|
Philip Page
|
Philip R. Page, Terry Goldman, Joseph. N. Ginocchio
|
Relativistic Symmetry Suppresses Quark Spin-Orbit Splitting
|
16 pages, LaTeX. Two postscript figures. Final version to be
published in Physical Review Letters
|
Phys.Rev.Lett.86:204-207,2001
|
10.1103/PhysRevLett.86.204
|
LA-UR-00-600
|
hep-ph hep-lat nucl-th
| null |
Experimental data indicate small spin-orbit splittings in hadrons. For
heavy-light mesons we identify a relativistic symmetry that suppresses these
splittings. We suggest an experimental test in electron-positron annihilation.
Furthermore, we argue that the dynamics necessary for this symmetry are
possible in QCD.
|
[{'version': 'v1', 'created': 'Wed, 9 Feb 2000 00:05:53 GMT'}
{'version': 'v2', 'created': 'Thu, 16 Nov 2000 20:02:28 GMT'}]
|
2008-11-26
|
[array(['Page', 'Philip R.', ''], dtype=object)
array(['Goldman', 'Terry', ''], dtype=object)
array(['Ginocchio', 'Joseph. N.', ''], dtype=object)]
|
4,319 |
math/0609444
|
Paul-Eugene Parent
|
Kathryn Hess, Paul-Eugene Parent, Jonathan Scott
|
A chain coalgebra model for the James map
|
20 pages
| null | null | null |
math.AT
| null |
Let EK be the simplicial suspension of a pointed simplicial set K. We
construct a chain model of the James map, $\alpha_{K} : CK \to \Omega CEK$. We
compute the cobar diagonal on $\Omega CEK$, not assuming that $EK$ is
1-reduced, and show that $\alpha_{K}$ is comultiplicative. As a result, the
natural isomorphism of chain algebras $TCK \cong \Omega CK$ preserves
diagonals.
In an appendix, we show that the Milgram map, $\Omega (A \otimes B) \to
\Omega A \otimes \Omega B$, where A and B are coaugmented coalgebras, forms
part of a strong deformation retract of chain complexes. Therefore, it is a
chain equivalence even when A and B are not 1-connected.
|
[{'version': 'v1', 'created': 'Fri, 15 Sep 2006 15:00:07 GMT'}]
|
2007-05-23
|
[array(['Hess', 'Kathryn', ''], dtype=object)
array(['Parent', 'Paul-Eugene', ''], dtype=object)
array(['Scott', 'Jonathan', ''], dtype=object)]
|
4,320 |
1908.11490
|
Oliver Stevenson
|
Oliver George Stevenson and Brendon James Brewer
|
Finding your feet: A Gaussian process model for estimating the abilities
of batsmen in Test cricket
|
27 pages, 9 figures
|
J R Stat Soc Series C, 70: 481-506
|
10.1111/rssc.12470
| null |
stat.AP physics.soc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the sport of cricket, player batting ability is traditionally measured
using the batting average. However, the batting average fails to measure both
short-term changes in ability that occur during an innings, and long-term
changes that occur between innings, due to the likes of age and experience in
various match conditions. We derive and fit a Bayesian parametric model that
employs a Gaussian process to measure and predict how the batting abilities of
cricket players vary and fluctuate over the course of entire playing careers.
The results allow us to better quantify and predict player batting ability,
compared with both traditional cricket statistics, such as the batting average,
and more complex models, such as the official International Cricket Council
ratings.
|
[{'version': 'v1', 'created': 'Fri, 30 Aug 2019 00:14:09 GMT'}
{'version': 'v2', 'created': 'Wed, 24 Mar 2021 04:35:04 GMT'}]
|
2021-03-25
|
[array(['Stevenson', 'Oliver George', ''], dtype=object)
array(['Brewer', 'Brendon James', ''], dtype=object)]
|
4,321 |
2105.01824
|
Luca Weishaupt
|
Luca L. Weishaupt (1), Jose Torres (2), Sophie Camilleri-Bro\"et (2),
Roni F. Rayes (3), Jonathan D. Spicer (3), Sabrina C\^ot\'e Maldonado (1),
Shirin A. Enger (1 and 4) ((1) Medical Physics Unit, Department of Oncology,
Faculty of Medicine, McGill University, Montr\'eal, Qu\'ebec, Canada, (2)
Department of Pathology, Faculty of Medicine, McGill University, Montr\'eal,
Qu\'ebec, Canada, (3) Cancer Research Program and the LD MacLean Surgical
Research Laboratories, Department of Surgery, Division of Upper GI and
Thoracic Surgery, Research Institute of the McGill University Health Center,
Montr\'eal, Qu\'ebec, Canada, (4) Research Institute of the McGill University
Health Center, Montr\'eal, Qu\'ebec, Canada)
|
Deep learning-based tumor segmentation on digital images of
histopathology slides for microdosimetry applications
|
17 pages, 5 figures, 2 tables
| null | null | null |
physics.med-ph
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
$\bf{Purpose:}$ The goal of this study was (i) to use artificial intelligence
to automate the traditionally labor-intensive process of manual segmentation of
tumor regions in pathology slides performed by a pathologist and (ii) to
validate the use of a well-known and readily available deep learning
architecture. Automation will reduce the human error involved in manual
delineation, increase efficiency, and result in accurate and reproducible
segmentation. This advancement will alleviate the bottleneck in the workflow in
clinical and research applications due to a lack of pathologist time. Our
application is patient-specific microdosimetry and radiobiological modeling,
which builds on the contoured pathology slides.
$\bf{Methods:}$ A U-Net architecture was used to segment tumor regions in
pathology core biopsies of lung tissue with adenocarcinoma stained using
hematoxylin and eosin. A pathologist manually contoured the tumor regions in 56
images with binary masks for training. Overlapping patch extraction with
various patch sizes and image downsampling were investigated individually. Data
augmentation and 8-fold cross-validation were used.
$\bf{Results:}$ The U-Net achieved accuracy of 0.91$\pm$0.06, specificity of
0.90$\pm$0.08, sensitivity of 0.92$\pm$0.07, and precision of 0.8$\pm$0.1. The
F1/DICE score was 0.85$\pm$0.07, with a segmentation time of 3.24$\pm$0.03
seconds per image, achieving a 370$\pm$3 times increased efficiency over manual
segmentation. In some cases, the U-Net correctly delineated the tumor's stroma
from its epithelial component in regions that were classified as tumor by the
pathologist.
$\bf{Conclusion:}$ The U-Net architecture can segment images with a level of
efficiency and accuracy that makes it suitable for tumor segmentation of
histopathological images in fields such as radiotherapy dosimetry, specifically
in the subfields of microdosimetry.
|
[{'version': 'v1', 'created': 'Wed, 5 May 2021 01:36:20 GMT'}]
|
2021-05-06
|
[array(['Weishaupt', 'Luca L.', '', '1 and 4'], dtype=object)
array(['Torres', 'Jose', '', '1 and 4'], dtype=object)
array(['Camilleri-Broët', 'Sophie', '', '1 and 4'], dtype=object)
array(['Rayes', 'Roni F.', '', '1 and 4'], dtype=object)
array(['Spicer', 'Jonathan D.', '', '1 and 4'], dtype=object)
array(['Maldonado', 'Sabrina Côté', '', '1 and 4'], dtype=object)
array(['Enger', 'Shirin A.', '', '1 and 4'], dtype=object)]
|
4,322 |
1708.02751
|
Heiko Gimperlein
|
Gissell Estrada-Rodriguez, Heiko Gimperlein, Kevin J. Painter
|
Fractional Patlak-Keller-Segel equations for chemotactic superdiffusion
|
20 pages, 4 figures, to appear in SIAM Journal on Applied Mathematics
|
SIAM Journal on Applied Mathematics 78 (2018), 1155-1173
|
10.1137/17M1142867
| null |
physics.bio-ph math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The long range movement of certain organisms in the presence of a
chemoattractant can be governed by long distance runs, according to an
approximate Levy distribution. This article clarifies the form of biologically
relevant model equations: We derive Patlak-Keller-Segel-like equations
involving nonlocal, fractional Laplacians from a microscopic model for cell
movement. Starting from a power-law distribution of run times, we derive a
kinetic equation in which the collision term takes into account the long range
behaviour of the individuals. A fractional chemotactic equation is obtained in
a biologically relevant regime. Apart from chemotaxis, our work has
implications for biological diffusion in numerous processes.
|
[{'version': 'v1', 'created': 'Wed, 9 Aug 2017 08:08:50 GMT'}
{'version': 'v2', 'created': 'Wed, 24 Jan 2018 19:52:32 GMT'}]
|
2018-04-12
|
[array(['Estrada-Rodriguez', 'Gissell', ''], dtype=object)
array(['Gimperlein', 'Heiko', ''], dtype=object)
array(['Painter', 'Kevin J.', ''], dtype=object)]
|
4,323 |
1511.04370
|
Vincent Drach
|
Vincent Drach, Ari Hietanen, Claudio Pica, Jarno Rantaharju, Francesco
Sannino
|
Template Composite Dark Matter : SU(2) gauge theory with 2 fundamental
flavours
|
Contribution to proceedings of the 33rd International Symposium on
Lattice Field Theory (Lattice 2015), 14-18 July 2015, Kobe, Japan
| null | null |
CP3-Origins-2015-046 DNRF90, DIAS-2015-46
|
hep-lat hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a non perturbative study of SU(2) gauge theory with two
fundamental Dirac flavours. We discuss how the model can be used as a template
for composite Dark Matter (DM). We estimate one particular interaction of the
DM candidate with the Standard Model : the interaction through photon exchange
computing the electric polarizability of the DM candidate. Finally, we briefly
discuss the viability of the model given the present experimental constraints.
|
[{'version': 'v1', 'created': 'Fri, 13 Nov 2015 17:19:07 GMT'}]
|
2015-11-16
|
[array(['Drach', 'Vincent', ''], dtype=object)
array(['Hietanen', 'Ari', ''], dtype=object)
array(['Pica', 'Claudio', ''], dtype=object)
array(['Rantaharju', 'Jarno', ''], dtype=object)
array(['Sannino', 'Francesco', ''], dtype=object)]
|
4,324 |
2101.00958
|
Daniel Schuster
|
Daniel Schuster, Gero J. Kolhof
|
Scalable Online Conformance Checking Using Incremental Prefix-Alignment
Computation
| null | null |
10.1007/978-3-030-76352-7_36
| null |
cs.LO cs.SE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Conformance checking techniques aim to collate observed process behavior with
normative/modeled process models. The majority of existing approaches focuses
on completed process executions, i.e., offline conformance checking. Recently,
novel approaches have been designed to monitor ongoing processes, i.e., online
conformance checking. Such techniques detect deviations of an ongoing process
execution from a normative process model at the moment they occur. Thereby,
countermeasures can be taken immediately to prevent a process deviation from
causing further, undesired consequences. Most online approaches only allow to
detect approximations of deviations. This causes the problem of falsely
detected deviations, i.e., detected deviations that are actually no deviations.
We have, therefore, recently introduced a novel approach to compute exact
conformance checking results in an online environment. In this paper, we focus
on the practical application and present a scalable, distributed implementation
of the proposed online conformance checking approach. Moreover, we present two
extensions to said approach to reduce its computational effort and its
practical applicability. We evaluate our implementation using data sets
capturing the execution of real processes.
|
[{'version': 'v1', 'created': 'Tue, 22 Dec 2020 09:45:40 GMT'}]
|
2022-11-23
|
[array(['Schuster', 'Daniel', ''], dtype=object)
array(['Kolhof', 'Gero J.', ''], dtype=object)]
|
4,325 |
2106.04332
|
Negar Heidari
|
Negar Heidari and Alexandros Iosifidis
|
Progressive Spatio-Temporal Bilinear Network with Monte Carlo Dropout
for Landmark-based Facial Expression Recognition with Uncertainty Estimation
|
6 pages, 3 figures, 3 tables
| null | null | null |
cs.CV cs.CC cs.HC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Deep neural networks have been widely used for feature learning in facial
expression recognition systems. However, small datasets and large intra-class
variability can lead to overfitting. In this paper, we propose a method which
learns an optimized compact network topology for real-time facial expression
recognition utilizing localized facial landmark features. Our method employs a
spatio-temporal bilinear layer as backbone to capture the motion of facial
landmarks during the execution of a facial expression effectively. Besides, it
takes advantage of Monte Carlo Dropout to capture the model's uncertainty which
is of great importance to analyze and treat uncertain cases. The performance of
our method is evaluated on three widely used datasets and it is comparable to
that of video-based state-of-the-art methods while it has much less complexity.
|
[{'version': 'v1', 'created': 'Tue, 8 Jun 2021 13:40:30 GMT'}]
|
2021-06-09
|
[array(['Heidari', 'Negar', ''], dtype=object)
array(['Iosifidis', 'Alexandros', ''], dtype=object)]
|
4,326 |
2306.16553
|
Huy\^en Pham
|
Delia Coculescu and M\'ed\'eric Motte and Huy\^en Pham
|
Opinion dynamics in communities with major influencers and implicit
social influence via mean-field approximation
|
42 pages, 8 figures
| null | null | null |
math.PR econ.GN q-fin.EC
|
http://creativecommons.org/publicdomain/zero/1.0/
|
We study binary opinion formation in a large population where individuals are
influenced by the opinions of other individuals. The population is
characterised by the existence of (i) communities where individuals share some
similar features, (ii) opinion leaders that may trigger unpredictable opinion
shifts in the short term (iii) some degree of incomplete information in the
observation of the individual or public opinion processes. In this setting, we
study three different approximate mechanisms: common sampling approximation,
independent sampling approximation, and, what will be our main focus in this
paper, McKean-Vlasov (or mean-field) approximation. We show that all three
approximations perform well in terms of different metrics that we introduce for
measuring population level and individual level errors. In the presence of a
common noise represented by the major influencers opinions processes, and
despite the absence of idiosyncratic noises, we derive a propagation of chaos
type result. For the particular case of a linear model and particular
specifications of the major influencers opinion dynamics, we provide additional
analysis, including long term behavior and fluctuations of the public opinion.
The theoretical results are complemented by some concrete examples and
numerical analysis, illustrating the formation of echo-chambers, the
propagation of chaos, and phenomena such as snowball effect and social
inertia.42 pages
|
[{'version': 'v1', 'created': 'Wed, 28 Jun 2023 20:45:14 GMT'}]
|
2023-06-30
|
[array(['Coculescu', 'Delia', ''], dtype=object)
array(['Motte', 'Médéric', ''], dtype=object)
array(['Pham', 'Huyên', ''], dtype=object)]
|
4,327 |
0803.3144
|
Bruno Zimmermann
|
Bruno P. Zimmermann
|
A note on minimal finite quotients of mapping class groups
|
8 pages
| null | null | null |
math.GT math.GR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove that the minimal nontrivial finite quotient group of the mapping
class group M_g of a closed orientable surface of genus g is the symplectic
group PSp(2g,Z_2), for g = 3 and 4 (this might remain true, however, for
arbitrary genus g > 2). We discuss also some results for arbitrary genus g.
|
[{'version': 'v1', 'created': 'Fri, 21 Mar 2008 11:04:52 GMT'}]
|
2008-03-24
|
[array(['Zimmermann', 'Bruno P.', ''], dtype=object)]
|
4,328 |
1109.4197
|
John Steele
|
John D. Steele
|
The general homothetic equations
| null | null | null | null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In an earlier paper [6] the author wrote the homothetic equations for vacuum
solutions in a first order formalism allowing for arbitrary alignment of the
dyad. This paper generalises that method to homothetic equations in non-vacuum
spaces and also provides useful second integrability conditions. An application
to the well-known Petrov type O pure radiation solutions is given.
|
[{'version': 'v1', 'created': 'Tue, 20 Sep 2011 00:52:47 GMT'}]
|
2011-09-21
|
[array(['Steele', 'John D.', ''], dtype=object)]
|
4,329 |
1904.06047
|
Masahiro Fukuda
|
Masahiro Fukuda, Jingning Zhang, Yung-Ting Lee, Taisuke Ozaki
|
Structure map of AB$_2$ type 2D materials by high-throughput DFT
calculations
|
56 pages, 12 figures, 10 tables
| null | null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
By high-throughput calculations based on the density functional theory, we
construct a structure map for AB$_2$ type monolayers of 3844 compounds which
are all the combinations of 62 elements selected from the periodic table. The
structure map and its web version (www.openmx-square.org/2d-ab2/) provide
comprehensive structural trends of the 3844 compounds in two dimensional (2D)
structures, and predict correctly structures of most of existing 2D compounds
such as transition metal dichalcogenides and MXenes having 1T or 1H type
structures. We also summarize all the families of 1T/1H type AB$_2$ monolayers
for each combination of groups in the periodic table on the basis of our
structure map, and propose new types of structures such as a memory structure,
which may be a candidate material for data storage applications with an
extremely high areal density. In addition, planar and distorted planar
structures and other geometrically characteristic structures are found through
the high-throughput calculations. These characteristic structures might give
new viewpoints and directions to search unknown 2D materials. Our structure map
and database will promote efforts towards synthesizing undiscovered 2D
materials experimentally and investigating properties of the new structures
theoretically.
|
[{'version': 'v1', 'created': 'Fri, 12 Apr 2019 05:58:55 GMT'}]
|
2019-04-15
|
[array(['Fukuda', 'Masahiro', ''], dtype=object)
array(['Zhang', 'Jingning', ''], dtype=object)
array(['Lee', 'Yung-Ting', ''], dtype=object)
array(['Ozaki', 'Taisuke', ''], dtype=object)]
|
4,330 |
1808.00430
|
Wenhao Chen
|
Wenhao Chen, Li Lin, Min Wu, Jennifer Newman
|
Tackling Android Stego Apps in the Wild
| null | null | null | null |
cs.CR
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Digital image forensics is a young but maturing field, encompassing key areas
such as camera identification, detection of forged images, and steganalysis.
However, large gaps exist between academic results and applications used by
practicing forensic analysts. To move academic discoveries closer to real-world
implementations, it is important to use data that represent "in the wild"
scenarios. For detection of stego images created from steganography apps,
images generated from those apps are ideal to use. In this paper, we present
our work to perform steg detection on images from mobile apps using two
different approaches: "signature" detection, and machine learning methods. A
principal challenge of the ML task is to create a great many of stego images
from different apps with certain embedding rates. One of our main contributions
is a procedure for generating a large image database by using Android emulators
and reverse engineering techniques. We develop algorithms and tools for
signature detection on stego apps, and provide solutions to issues encountered
when creating ML classifiers.
|
[{'version': 'v1', 'created': 'Wed, 1 Aug 2018 17:23:36 GMT'}]
|
2018-08-02
|
[array(['Chen', 'Wenhao', ''], dtype=object)
array(['Lin', 'Li', ''], dtype=object)
array(['Wu', 'Min', ''], dtype=object)
array(['Newman', 'Jennifer', ''], dtype=object)]
|
4,331 |
nlin/0506038
|
Victor Yakhot
|
Victor Yakhot and Katepalli R. Sreenivasan
|
Anomalous Scaling of Structure Functions and Dynamic Constraints on
Turbulence Simulations
|
18 pages
| null |
10.1007/s10955-005-8666-6
| null |
nlin.CD
| null |
The connection between anomalous scaling of structure functions
(intermittency) and numerical methods for turbulence simulations is discussed.
It is argued that the computational work for direct numerical simulations (DNS)
of fully developed turbulence increases as $Re^{4}$, and not as $Re^{3}$
expected from Kolmogorov's theory, where $Re$ is a large-scale Reynolds number.
Various relations for the moments of acceleration and velocity derivatives are
derived. An infinite set of exact constraints on dynamically consistent subgrid
models for Large Eddy Simulations (LES) is derived from the Navier-Stokes
equations, and some problems of principle associated with existing LES models
are highlighted.
|
[{'version': 'v1', 'created': 'Fri, 17 Jun 2005 15:00:32 GMT'}
{'version': 'v2', 'created': 'Mon, 20 Jun 2005 07:45:34 GMT'}]
|
2009-11-11
|
[array(['Yakhot', 'Victor', ''], dtype=object)
array(['Sreenivasan', 'Katepalli R.', ''], dtype=object)]
|
4,332 |
2110.11522
|
Kristin Kruse Madsen
|
Kristin K. Madsen and Karl Forster, Brian W. Grefenstette and Fiona A.
Harrison and Hiromasa Miyasaka
|
2021 Effective Area calibration of the Nuclear Spectroscopic Telescope
ARray (NuSTAR)
|
26 pages, 18 figures
| null | null | null |
astro-ph.IM astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present here the updated calibration of The Nuclear Spectroscopic
Telescope ARray NuSTAR, which was performed using data on the Crab accumulated
over the last 9 years in orbit. The basis for this new calibration contains
over 250ks of focused Crab (imaged through the optics) and over 500ks of
stray-light Crab (not imaged through optics). We measured an epoch averaged
Crab spectrum of the stray-light Crab data and define a canonical Crab spectrum
of Gamma = 2.103 +- 0.001 and N = 9.69 +- 0.02 keV-1 cm-2 s-1 at 1 keV, which
we use as our calibration standard. The new calibration, released in the CALDB
update 20211020, provides significant updates to: 1) the detector absorption
component, 2) the detector response function, and 3) the effective area
vignetting function. The calibration improves agreement between FPMA and FPMB
across detectors with a standard deviation of 1.7% for repeat observations
between off-axis angles of 1-4 arcmin, and the measured flux has increased by
5-15%, with 5% below 1 arcmin off-axis angle, 10% between 1-2 arcmin, and 15
above 4arcmin.
|
[{'version': 'v1', 'created': 'Thu, 21 Oct 2021 23:39:15 GMT'}]
|
2021-10-25
|
[array(['Madsen', 'Kristin K.', ''], dtype=object)
array(['Forster', 'Karl', ''], dtype=object)
array(['Grefenstette', 'Brian W.', ''], dtype=object)
array(['Harrison', 'Fiona A.', ''], dtype=object)
array(['Miyasaka', 'Hiromasa', ''], dtype=object)]
|
4,333 |
1302.0537
|
Krzysztof Maciej Piasecki
|
Krzysztof Piasecki
|
Basis of financial arithmetic from the viewpoint of the utility theory
| null |
Operations Research and Decisions 22(3), 2012, pp 37-53
|
10.5277/ord120303
| null |
q-fin.GN
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The main goal of this paper is presentation a modern axiomatic approach to
financial arithmetic. At the first, the axiomatic financial arithmetic theory
was proposed by Peccati who has introduced the axiomatic definition of the
future value. This theory has been extensively developed in past years.
Proposed approach to financial arithmetic is based on the financial flow
utility concept. This utility function is defined as linear extension of
multicriteria comparison determined by the time preference and the capital
preference. Then the present value is equal to financial flow utility.
Therefore, the law of diminishing marginal wealth utility has been considered
as additional feature of the present value. The future value is defined as the
inverse of utility function. This definition is a generalization of the Peccati
one. The net present value is given as the unique additive extension of
financial flow utility. Moreover, the synergy effect and the diversification
effect will be discussed. At the end, the axiomatic present value definition
will be specified in three ways.
|
[{'version': 'v1', 'created': 'Sun, 3 Feb 2013 21:36:05 GMT'}]
|
2014-11-18
|
[array(['Piasecki', 'Krzysztof', ''], dtype=object)]
|
4,334 |
1508.01208
|
Christopher Verhaaren
|
Brian Batell, Matthew McCullough, Daniel Stolarski, and Christopher B.
Verhaaren
|
Putting a Stop to di-Higgs Modifications
|
16 pages + refrences; v2 updated references; v3 Published version
|
JHEP 1509 (2015) 216
|
10.1007/JHEP09(2015)216
|
CERN-PH-TH-2015-186
|
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Pair production of Higgs bosons at hadron colliders is an enticing channel to
search for new physics. New colored particles that couple strongly to the
Higgs, such as those most often called upon to address the hierarchy problem,
provide well motivated examples in which large enhancements of the di-Higgs
rate are possible, at least in principle. However, in such scenarios the
di-Higgs production rate is tightly correlated with the single Higgs production
rate and, since the latter is observed to be SM-like, one generally expects
that only modest enhancements in di-Higgs production are allowed by the LHC Run
1 data. We examine the contribution of top squarks (stops) in a simplified
supersymmetry model to di-Higgs production and find that this general
expectation is indeed borne out. In particular, the allowed deviations are
typically small, but there are tuned regions of parameter space where
expectations based on EFT arguments break down in which order 100% enhancements
to the di-Higgs production rate are possible and are simultaneously consistent
with the observed single Higgs production rates. These effects are potentially
observable with the high luminosity run of the LHC or at a future hadron
collider.
|
[{'version': 'v1', 'created': 'Wed, 5 Aug 2015 20:12:59 GMT'}
{'version': 'v2', 'created': 'Tue, 25 Aug 2015 03:55:21 GMT'}
{'version': 'v3', 'created': 'Fri, 9 Oct 2015 18:44:30 GMT'}]
|
2015-10-12
|
[array(['Batell', 'Brian', ''], dtype=object)
array(['McCullough', 'Matthew', ''], dtype=object)
array(['Stolarski', 'Daniel', ''], dtype=object)
array(['Verhaaren', 'Christopher B.', ''], dtype=object)]
|
4,335 |
astro-ph/0611657
|
Alexander Zakharov
|
A.F. Zakharov (ITEP), A.A. Zakharova (MSU), V.N. Pervushin (JINR)
|
Conformal Cosmological Model Test with Distant SNIa Data
|
11 pages, 4 figures
| null | null | null |
astro-ph
| null |
Assuming that supernovae type Ia (SNe Ia) are standard candles one could use
them to test cosmological theories. The Hubble Space Telescope team analyzed
186 SNe Ia (Riess et al. (2004)) to test the standard cosmological model (SC)
and evaluate its parameters. We use the same sample to determine parameters of
Conformal Cosmological models (CC). We concluded, that really the test is
extremely useful and allows to evaluate parameters of the model. From a formal
statistical point of view the best fit of the CC model is almost the same
quality approximation as the best fit of SC model with $\Omega_\Lambda=0.72,
\Omega_m=0.28$. As it was noted earlier, for CC models, a rigid matter
component could substitute the $\Lambda$-term (or quintessence) existing in the
SC model.
|
[{'version': 'v1', 'created': 'Tue, 21 Nov 2006 02:53:50 GMT'}]
|
2007-05-23
|
[array(['Zakharov', 'A. F.', '', 'ITEP'], dtype=object)
array(['Zakharova', 'A. A.', '', 'MSU'], dtype=object)
array(['Pervushin', 'V. N.', '', 'JINR'], dtype=object)]
|
4,336 |
1512.02120
|
Andre Landulfo
|
Jessica Santiago, Andre G. S. Landulfo, William C. C. Lima, George E.
A. Matsas, Raissa F. P. Mendes, Daniel A. T. Vanzella
|
Instability of nonminimally coupled scalar fields in the spacetime of
thin charged shells
|
9 pages, 5 figures. Minor changes to match the published version
|
Phys. Rev. D 93, 024043 (2016)
|
10.1103/PhysRevD.93.024043
| null |
gr-qc hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the stability of a free scalar field nonminimally coupled to
gravity under linear perturbations in the spacetime of a charged spherical
shell. Our analysis is performed in the context of quantum field theory in
curved spacetimes. This paper completes previous analyses which considered the
exponential enhancement of vacuum fluctuations in the spacetime of massive
shells.
|
[{'version': 'v1', 'created': 'Mon, 7 Dec 2015 17:06:29 GMT'}
{'version': 'v2', 'created': 'Tue, 23 Feb 2016 12:35:03 GMT'}]
|
2016-02-24
|
[array(['Santiago', 'Jessica', ''], dtype=object)
array(['Landulfo', 'Andre G. S.', ''], dtype=object)
array(['Lima', 'William C. C.', ''], dtype=object)
array(['Matsas', 'George E. A.', ''], dtype=object)
array(['Mendes', 'Raissa F. P.', ''], dtype=object)
array(['Vanzella', 'Daniel A. T.', ''], dtype=object)]
|
4,337 |
1806.09460
|
Benjamin Recht
|
Benjamin Recht
|
A Tour of Reinforcement Learning: The View from Continuous Control
|
minor revision with a few clarifying passages and corrected typos
| null | null | null |
math.OC cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This manuscript surveys reinforcement learning from the perspective of
optimization and control with a focus on continuous control applications. It
surveys the general formulation, terminology, and typical experimental
implementations of reinforcement learning and reviews competing solution
paradigms. In order to compare the relative merits of various techniques, this
survey presents a case study of the Linear Quadratic Regulator (LQR) with
unknown dynamics, perhaps the simplest and best-studied problem in optimal
control. The manuscript describes how merging techniques from learning theory
and control can provide non-asymptotic characterizations of LQR performance and
shows that these characterizations tend to match experimental behavior. In
turn, when revisiting more complex applications, many of the observed phenomena
in LQR persist. In particular, theory and experiment demonstrate the role and
importance of models and the cost of generality in reinforcement learning
algorithms. This survey concludes with a discussion of some of the challenges
in designing learning systems that safely and reliably interact with complex
and uncertain environments and how tools from reinforcement learning and
control might be combined to approach these challenges.
|
[{'version': 'v1', 'created': 'Mon, 25 Jun 2018 13:58:20 GMT'}
{'version': 'v2', 'created': 'Sat, 10 Nov 2018 15:15:27 GMT'}]
|
2018-11-13
|
[array(['Recht', 'Benjamin', ''], dtype=object)]
|
4,338 |
hep-ph/0005157
|
Spencer Klein
|
Spencer R. Klein, Joakim Nystrand and Ramona Vogt
|
Photoproduction of top in peripheral heavy ion collisions
|
kinematics clarified (results unchanged); to appear in Eur. Phys. J.
C 13 pages including 2 figures kinematics section clarified (results
unchanged)
|
Eur.Phys.J.C21:563-566,2001
|
10.1007/s100520100739
|
LBNL-45743
|
hep-ph nucl-th
| null |
In relativistic heavy ion collisions, top quarks can be produced by
photon-gluon fusion when a photon from the Weizs\"acker-Williams virtual photon
field of one nucleus interacts with a gluon in the other nucleus.
Photoproduction with heavy ions at the Large Hadron Collider (LHC) will be the
first accessible non-hadronic top production channel. We calculate the $t \bar
t$ photoproduction cross sections, pair mass and top quark rapidity
distributions in peripheral heavy ion collisions. The cross sections are
sensitive to the top quark charge and the large-$Q^2$ gluon distribution in the
nucleus. We find a cross section of 94 pb in calcium-calcium collisions,
leading to 190 pairs in a one month ($10^6$ sec) LHC run. We also find $p$Pb
and $p$Ca cross sections of 5.8 and 3.4 pb respectively, resulting in 6 and 34
$t\bar t$ pairs per month.
|
[{'version': 'v1', 'created': 'Tue, 16 May 2000 21:45:15 GMT'}
{'version': 'v2', 'created': 'Fri, 11 Aug 2000 22:39:55 GMT'}
{'version': 'v3', 'created': 'Mon, 9 Jul 2001 20:28:17 GMT'}]
|
2009-01-07
|
[array(['Klein', 'Spencer R.', ''], dtype=object)
array(['Nystrand', 'Joakim', ''], dtype=object)
array(['Vogt', 'Ramona', ''], dtype=object)]
|
4,339 |
0908.3123
|
Lior Shamir
|
Lior Shamir and Robert J. Nemiroff
|
Frequency Limits on Naked-Eye Optical Transients Lasting from Minutes to
Years
|
Accepted for publication in AJ
| null |
10.1088/0004-6256/138/3/956
| null |
astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
How often do bright optical transients occur on the sky but go unreported? To
constrain the bright end of the astronomical transient function, a systematic
search for transients that become bright enough to be noticed by the unaided
eye was conducted using the all-sky monitors of the Night Sky Live network. Two
fisheye continuous cameras (CONCAMs) operating over three years created a data
base that was searched for transients that appeared in time-contiguous CCD
frames. Although a single candidate transient was found (Nemiroff and Shamir
2006), the lack of more transients is used here to deduce upper limits to the
general frequency of bright transients. To be detected, a transient must have
increased by over three visual magnitudes to become brighter than visual
magnitude 5.5 on the time scale of minutes to years. It is concluded that, on
the average, fewer than 0.0040 ($t_{dur} / 60$ seconds) transients with
duration $t_{dur}$ between minutes and hours, occur anywhere on the sky at any
one time. For transients on the order of months to years, fewer than 160
($t_{dur} / 1$ year) occur, while for transients on the order of years to
millennia, fewer than 50 ($t_{dur}/1$ year)$^2$ occur.
|
[{'version': 'v1', 'created': 'Fri, 21 Aug 2009 13:22:41 GMT'}]
|
2015-05-14
|
[array(['Shamir', 'Lior', ''], dtype=object)
array(['Nemiroff', 'Robert J.', ''], dtype=object)]
|
4,340 |
1903.06449
|
Kimmo Mustonen Dr.
|
Yongping Liao, Kimmo Mustonen, Semir Tulic, Viera Skakalova, Sabbir A.
Khan, Patrik Laiho, Qiang Zhang, Changfeng Li, Mohammad R.A. Monazam, Jani
Kotakoski, Harri Lipsanen, Esko I. Kauppinen
|
Enhanced Tunnelling in a Hybrid of Single-Walled Carbon Nanotubes and
Graphene
|
21 pages, 6 figures
| null | null | null |
physics.app-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Transparent and conductive films (TCFs) are of great technological
importance. The high transmittance, electrical conductivity and mechanical
strength make single-walled carbon nanotubes (SWCNTs) a good candidate for
their raw material. Despite the ballistic transport in individual SWCNTs,
however, the electrical conductivity of their networks is limited by low
efficiency of charge tunneling between the tube elements. Here, we demonstrate
that the nanotube network sheet resistance at high optical transmittance is
decreased by more than 50% when fabricated on graphene and thus provides a
comparable improvement as widely adopted gold chloride ($\mathrm{AuCl_3}$)
doping. However, while Raman spectroscopy reveals substantial changes in
spectral features of doped nanotubes, no similar effect is observed in presence
of graphene. Instead, temperature dependent transport measurements indicate
that graphene substrate reduces the tunneling barrier heights while its
parallel conductivity contribution is almost negligible. Finally, we show that
combining the graphene substrate and $\mathrm{AuCl_3}$ doping, the SWCNT thin
films can exhibit sheet resistance as low as 36 $\Omega$/sq. at 90%
transmittance.
|
[{'version': 'v1', 'created': 'Fri, 15 Mar 2019 10:37:47 GMT'}]
|
2019-03-18
|
[array(['Liao', 'Yongping', ''], dtype=object)
array(['Mustonen', 'Kimmo', ''], dtype=object)
array(['Tulic', 'Semir', ''], dtype=object)
array(['Skakalova', 'Viera', ''], dtype=object)
array(['Khan', 'Sabbir A.', ''], dtype=object)
array(['Laiho', 'Patrik', ''], dtype=object)
array(['Zhang', 'Qiang', ''], dtype=object)
array(['Li', 'Changfeng', ''], dtype=object)
array(['Monazam', 'Mohammad R. A.', ''], dtype=object)
array(['Kotakoski', 'Jani', ''], dtype=object)
array(['Lipsanen', 'Harri', ''], dtype=object)
array(['Kauppinen', 'Esko I.', ''], dtype=object)]
|
4,341 |
1804.03130
|
Julio Oliva
|
Alex Giacomini, Marcela Lagos, Julio Oliva and Aldo Vera
|
Charged black strings and black branes in Lovelock theories
|
21 pages, 4 figures. V2: Minor corrections. To appear in PRD
|
Phys. Rev. D 98, 044019 (2018)
|
10.1103/PhysRevD.98.044019
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It is well known that the Reissner-Norstrom solution of Einstein-Maxwell
theory cannot be cylindrically extended to higher dimension, as with the black
hole solutions in vacuum. In this paper we show that this result is
circumvented in Lovelock gravity. We prove that the theory containing only the
quadratic Lovelock term, the Gauss-Bonnet term, minimally coupled to a $U(1)$
field, admits homogeneous black string and black brane solutions characterized
by the mass, charge and volume of the flat directions. We also show that
theories containing a single Lovelock term of order $n$ in the Lagrangian
coupled to a $(p-1)$-form field admit simple oxidations only when $n$ equals
$p$, giving rise to new, exact, charged black branes in higher curvature
gravity. For General Relativity this stands for a Lagrangian containing the
Einstein-Hilbert term coupled to a massless scalar field, and no-hair theorems
in this case forbid the existence of black branes. In all these cases the field
equations acquire an invariance under a global scaling scale transformation of
the metric. As explicit examples we construct new magnetically charged black
branes for cubic Lovelock theory coupled to a Kalb-Ramond field in dimensions
$(3m+2)+q$, with $m$ and $q$ integers, and the latter denoting the number of
extended flat directions. We also construct dyonic solutions in quartic
Lovelock theory in dimension $(4m+2)+q$.
|
[{'version': 'v1', 'created': 'Mon, 9 Apr 2018 17:53:11 GMT'}
{'version': 'v2', 'created': 'Wed, 8 Aug 2018 13:38:20 GMT'}]
|
2018-08-22
|
[array(['Giacomini', 'Alex', ''], dtype=object)
array(['Lagos', 'Marcela', ''], dtype=object)
array(['Oliva', 'Julio', ''], dtype=object)
array(['Vera', 'Aldo', ''], dtype=object)]
|
4,342 |
1602.04616
|
Zongping Gong
|
Zongping Gong, Yuto Ashida, and Masahito Ueda
|
Quantum Trajectory Thermodynamics with Discrete Feedback Control
|
23 pages, 6 figures
|
Phys. Rev. A 94, 012107 (2016)
|
10.1103/PhysRevA.94.012107
| null |
cond-mat.stat-mech quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We employ the quantum jump trajectory approach to construct a systematic
framework to study the thermodynamics at the trajectory level in a
nonequilibrium open quantum system under discrete feedback control. Within this
framework, we derive quantum versions of the generalized Jarzynski equalities,
which are demonstrated in an isolated pseudospin system and a coherently driven
two-level open quantum system. Due to quantum coherence and measurement
backaction, a fundamental distinction from the classical generalized Jarzynski
equalities emerges in the quantum versions, which is characterized by a large
negative information gain reflecting genuinely quantum rare events. A possible
experimental scheme to test our findings in superconducting qubits is
discussed.
|
[{'version': 'v1', 'created': 'Mon, 15 Feb 2016 10:36:35 GMT'}
{'version': 'v2', 'created': 'Sun, 12 Jun 2016 14:16:26 GMT'}]
|
2016-07-12
|
[array(['Gong', 'Zongping', ''], dtype=object)
array(['Ashida', 'Yuto', ''], dtype=object)
array(['Ueda', 'Masahito', ''], dtype=object)]
|
4,343 |
1507.03504
|
Nicole Taheri
|
Nicole Taheri and Jia Yuan Yu and Robert Shorten
|
A Fair Assignment of Drivers to Parking Lots
| null | null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Searching for a parking spot can waste time and gasoline. This waste can be
reduced by assigning drivers to parking lots based on their destination and
arrival time. In such a system, drivers could request a parking spot in advance
and be alerted (e.g., via their phone or vehicle) of their assignment to a
specific parking lot or available spot. In this paper, a parking assignment
system is described to allocate parking spaces in a fair and equitable manner.
Heuristics are developed to solve the underlying large scale optimization
problem. The efficacy of the system is demonstrated by applying our algorithms
to real data sets.
|
[{'version': 'v1', 'created': 'Mon, 13 Jul 2015 16:00:32 GMT'}]
|
2015-07-14
|
[array(['Taheri', 'Nicole', ''], dtype=object)
array(['Yu', 'Jia Yuan', ''], dtype=object)
array(['Shorten', 'Robert', ''], dtype=object)]
|
4,344 |
2210.01218
|
Razieh Emami Meibody
|
Razieh Emami, Angelo Ricarte, George N. Wong, Daniel Palumbo, Dominic
Chang, Sheperd S. Doeleman, Avery Broaderick, Ramesh Narayan, Maciek Wielgus,
Lindy Blackburn, Ben S. Prather, Andrew A. Chael, Richard Anantua, Koushik
Chatterjee, Ivan Marti-Vidal, Jose L. Gomez, Kazunori Akiyama, Matthew Liska,
Lars Hernquist, Grant Tremblay, Mark Vogelsberger, Charles Alcock, Randall
Smith, James Steiner, Paul Tiede and Freek Roelofs
|
Unraveling Twisty Linear Polarization Morphologies in Black Hole Images
|
26 pages, 20 figures, accepted for publication in ApJ
| null |
10.3847/1538-4357/acc8cd
| null |
astro-ph.GA astro-ph.CO astro-ph.HE
|
http://creativecommons.org/licenses/by/4.0/
|
We investigate general relativistic magnetohydrodynamic simulations (GRMHD)
to determine the physical origin of the twisty patterns of linear polarization
seen in spatially resolved black hole images and explain their morphological
dependence on black hole spin. By characterising the observed emission with a
simple analytic ring model, we find that the twisty morphology is determined by
the magnetic field structure in the emitting region. Moreover, the dependence
of this twisty pattern on spin can be attributed to changes in the magnetic
field geometry that occur due to the frame dragging. By studying an analytic
ring model, we find that the roles of Doppler boosting and lensing are
subdominant. Faraday rotation may cause a systematic shift in the linear
polarization pattern, but we find that its impact is subdominant for models
with strong magnetic fields and modest ion-to-electron temperature ratios.
Models with weaker magnetic fields are much more strongly affected by Faraday
rotation and have more complicated emission geometries than can be captured by
a ring model. However, these models are currently disfavoured by the recent EHT
observations of M87*. Our results suggest that linear polarization maps can
provide a probe of the underlying magnetic field structure around a black hole,
which may then be usable to indirectly infer black hole spins. The generality
of these results should be tested with alternative codes, initial conditions,
and plasma physics prescriptions.
|
[{'version': 'v1', 'created': 'Mon, 3 Oct 2022 20:26:40 GMT'}
{'version': 'v2', 'created': 'Tue, 28 Mar 2023 21:53:10 GMT'}]
|
2023-06-14
|
[array(['Emami', 'Razieh', ''], dtype=object)
array(['Ricarte', 'Angelo', ''], dtype=object)
array(['Wong', 'George N.', ''], dtype=object)
array(['Palumbo', 'Daniel', ''], dtype=object)
array(['Chang', 'Dominic', ''], dtype=object)
array(['Doeleman', 'Sheperd S.', ''], dtype=object)
array(['Broaderick', 'Avery', ''], dtype=object)
array(['Narayan', 'Ramesh', ''], dtype=object)
array(['Wielgus', 'Maciek', ''], dtype=object)
array(['Blackburn', 'Lindy', ''], dtype=object)
array(['Prather', 'Ben S.', ''], dtype=object)
array(['Chael', 'Andrew A.', ''], dtype=object)
array(['Anantua', 'Richard', ''], dtype=object)
array(['Chatterjee', 'Koushik', ''], dtype=object)
array(['Marti-Vidal', 'Ivan', ''], dtype=object)
array(['Gomez', 'Jose L.', ''], dtype=object)
array(['Akiyama', 'Kazunori', ''], dtype=object)
array(['Liska', 'Matthew', ''], dtype=object)
array(['Hernquist', 'Lars', ''], dtype=object)
array(['Tremblay', 'Grant', ''], dtype=object)
array(['Vogelsberger', 'Mark', ''], dtype=object)
array(['Alcock', 'Charles', ''], dtype=object)
array(['Smith', 'Randall', ''], dtype=object)
array(['Steiner', 'James', ''], dtype=object)
array(['Tiede', 'Paul', ''], dtype=object)
array(['Roelofs', 'Freek', ''], dtype=object)]
|
4,345 |
0908.2184
|
Soumendu Datta
|
Soumendu Datta, Mukul Kabir, Tanusri Saha-Dasgupta, and Abhijit
Mookerjee
|
Structure, reactivity and electronic properties of V-doped Co clusters
|
10 pages, 9 figures, 4 tables
|
Soumendu Datta, Mukul Kabir, Tanusri Saha-Dasgupta and Abhijit
Mookerjee, Phys. Rev. B, {\bf 80}, 085418 (2009)
|
10.1103/PhysRevB.80.085418
| null |
physics.atm-clus
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Structures, physical and chemical properties of V doped Co$_{13}$ clusters
have been studied in detail using density functional theory based
first-principles method. We have found anomalous variation in stability of the
doped clusters with increasing V concentration, which has been nicely
demonstrated in terms of energetics and electronic properties of the clusters.
Our study explains the nonmonotonic variation in reactivity of Co$_{13-m}$V$_m$
clusters towards H$_2$ molecules as reported experimentally [J. Phys. Chem.
{\bf 94}, 2744 (1990)]. Moreover, it provides useful insight into the cluster
geometry and chemically active sites on the cluster surface, which can help to
design better catalytic processes.
|
[{'version': 'v1', 'created': 'Sat, 15 Aug 2009 14:24:43 GMT'}]
|
2009-08-18
|
[array(['Datta', 'Soumendu', ''], dtype=object)
array(['Kabir', 'Mukul', ''], dtype=object)
array(['Saha-Dasgupta', 'Tanusri', ''], dtype=object)
array(['Mookerjee', 'Abhijit', ''], dtype=object)]
|
4,346 |
hep-ph/9804442
|
Isabelle Royen
|
I. Royen (Liege University, Belgium)
|
A Low-Nussinov Model for Elastic Vector Meson Production at HERA
|
3 pages LaTeX, 4 Postscipt figures. Contribution to the 6_th
International Workshop on Deep Inelastic Scattering and QCD, DIS 98,
Brussels, Belgium, April 4-8, 1998, to appear in the proceedings
| null | null |
ULG-PNT-98-1-IR
|
hep-ph
| null |
I show that a lowest-order pQCD calculation of elastic vector-meson
production does reproduce all the features of experimental measurements at
HERA, for all Q^2 and all mesons, at fixed energy.
|
[{'version': 'v1', 'created': 'Wed, 29 Apr 1998 06:27:40 GMT'}
{'version': 'v2', 'created': 'Fri, 28 Aug 1998 11:44:11 GMT'}]
|
2007-05-23
|
[array(['Royen', 'I.', '', 'Liege University, Belgium'], dtype=object)]
|
4,347 |
1201.5999
|
Chris Pankow
|
the LIGO Scientific Collaboration, the Virgo Collaboration: J. Abadie,
B. P. Abbott, R. Abbott, T. D. Abbott, M. Abernathy, T. Accadia, F. Acernese,
C. Adams, R. Adhikari, C. Affeldt, M. Agathos, K. Agatsuma, P. Ajith, B.
Allen, E. Amador Ceron, D. Amariutei, S. B. Anderson, W. G. Anderson, K.
Arai, M. A. Arain, M. C. Araya, S. M. Aston, P. Astone, D. Atkinson, P.
Aufmuth, C. Aulbert, B. E. Aylott, S. Babak, P. Baker, G. Ballardin, S.
Ballmer, J. C. B. Barayoga, D. Barker, F. Barone, B. Barr, L. Barsotti, M.
Barsuglia, M. A. Barton, I. Bartos, R. Bassiri, M. Bastarrika, A. Basti, J.
Batch, J. Bauchrowitz, Th. S. Bauer, M. Bebronne, D. Beck, B. Behnke, M.
Bejger, M.G. Beker, A. S. Bell, A. Belletoile, I. Belopolski, M. Benacquista,
J. M. Berliner, A. Bertolini, J. Betzwieser, N. Beveridge, P. T. Beyersdorf,
I. A. Bilenko, G. Billingsley, J. Birch, R. Biswas, M. Bitossi, M. A.
Bizouard, E. Black, J. K. Blackburn, L. Blackburn, D. Blair, B. Bland, M.
Blom, O. Bock, T. P. Bodiya, C. Bogan, R. Bondarescu, F. Bondu, L. Bonelli,
R. Bonnand, R. Bork, M. Born, V. Boschi, S. Bose, L. Bosi, B. Bouhou, S.
Braccini, C. Bradaschia, P. R. Brady, V. B. Braginsky, M. Branchesi, J. E.
Brau, J. Breyer, T. Briant, D. O. Bridges, A. Brillet, M. Brinkmann, V.
Brisson, M. Britzger, A. F. Brooks, D. A. Brown, T. Bulik, H. J. Bulten, A.
Buonanno, J. Burguet-Castell, D. Buskulic, C. Buy, R. L. Byer, L. Cadonati,
G. Cagnoli, E. Calloni, J. B. Camp, P. Campsie, J. Cannizzo, K. Cannon, B.
Canuel, J. Cao, C. D. Capano, F. Carbognani, L. Carbone, S. Caride, S.
Caudill, M. Cavaglia, F. Cavalier, R. Cavalieri, G. Cella, C. Cepeda, E.
Cesarini, O. Chaibi, T. Chalermsongsak, P. Charlton, E. Chassande-Mottin, S.
Chelkowski, W. Chen, X. Chen, Y. Chen, A. Chincarini, A. Chiummo, H. Cho, J.
Chow, N. Christensen, S. S. Y. Chua, C. T. Y. Chung, S. Chung, G. Ciani, F.
Clara, D. E. Clark, J. Clark, J. H. Clayton, F. Cleva, E. Coccia, P.-F.
Cohadon, C. N. Colacino, J. Colas, A. Colla, M. Colombini, A. Conte, R.
Conte, D. Cook, T. R. Corbitt, M. Cordier, N. Cornish, A. Corsi, C. A. Costa,
M. Coughlin, J.-P. Coulon, P. Couvares, D. M. Coward, M. Cowart, D. C. Coyne,
J. D. E. Creighton, T. D. Creighton, A. M. Cruise, A. Cumming, L. Cunningham,
E. Cuoco, R. M. Cutler, K. Dahl, S. L. Danilishin, R. Dannenberg, S.
D'Antonio, K. Danzmann, V. Dattilo, B. Daudert, H. Daveloza, M. Davier, E. J.
Daw, R. Day, T. Dayanga, R. De Rosa, D. DeBra, G. Debreczeni, W. Del Pozzo,
M. del Prete, T. Dent, V. Dergachev, R. DeRosa, R. DeSalvo, S. Dhurandhar, L.
Di Fiore, A. Di Lieto, I. Di Palma, M. Di Paolo Emilio, A. Di Virgilio, M.
Diaz, A. Dietz, F. Donovan, K. L. Dooley, M. Drago, R. W. P. Drever, J. C.
Driggers, Z. Du, J.-C. Dumas, S. Dwyer, T. Eberle, M. Edgar, M. Edwards, A.
Effler, P. Ehrens, G. Endroczi, R. Engel, T. Etzel, K. Evans, M. Evans, T.
Evans, M. Factourovich, V. Fafone, S. Fairhurst, Y. Fan, B. F. Farr, D. Fazi,
H. Fehrmann, D. Feldbaum, F. Feroz, I. Ferrante, F. Fidecaro, L. S. Finn, I.
Fiori, R. P. Fisher, R. Flaminio, M. Flanigan, S. Foley, E. Forsi, L. A.
Forte, N. Fotopoulos, J.-D. Fournier, J. Franc, S. Frasca, F. Frasconi, M.
Frede, M. Frei, Z. Frei, A. Freise, R. Frey, T. T. Fricke, D. Friedrich, P.
Fritschel, V. V. Frolov, M.-K. Fujimoto, P. J. Fulda, M. Fyffe, J. Gair, M.
Galimberti, L. Gammaitoni, J. Garcia, F. Garufi, M. E. Gaspar, G. Gemme, R.
Geng, E. Genin, A. Gennai, L. A. Gergely, S. Ghosh, J. A. Giaime, S.
Giampanis, K. D. Giardina, A. Giazotto, S. Gil, C. Gill, J. Gleason, E.
Goetz, L. M. Goggin, G. Gonzalez, M. L. Gorodetsky, S. Gossler, R. Gouaty, C.
Graef, P. B. Graff, M. Granata, A. Grant, S. Gras, C. Gray, N. Gray, R. J. S.
Greenhalgh, A. M. Gretarsson, C. Greverie, R. Grosso, H. Grote, S. Grunewald,
G. M. Guidi, C. Guido, R. Gupta, E. K. Gustafson, R. Gustafson, T. Ha, J. M.
Hallam, D. Hammer, G. Hammond, J. Hanks, C. Hanna, J. Hanson, J. Harms, G. M.
Harry, I. W. Harry, E. D. Harstad, M. T. Hartman, K. Haughian, K. Hayama,
J.-F. Hayau, J. Heefner, A. Heidmann, M. C. Heintze, H. Heitmann, P. Hello,
M. A. Hendry, I. S. Heng, A. W. Heptonstall, V. Herrera, M. Hewitson, S.
Hild, D. Hoak, K. A. Hodge, K. Holt, M. Holtrop, T. Hong, S. Hooper, D. J.
Hosken, J. Hough, E. J. Howell, B. Hughey, S. Husa, S. H. Huttner, T.
Huynh-Dinh, D. R. Ingram, R. Inta, T. Isogai, A. Ivanov, K. Izumi, M.
Jacobson, E. James, Y. J. Jang, P. Jaranowski, E. Jesse, W. W. Johnson, D. I.
Jones, G. Jones, R. Jones, L. Ju, P. Kalmus, V. Kalogera, S. Kandhasamy, G.
Kang, J. B. Kanner, R. Kasturi, E. Katsavounidis, W. Katzman, H. Kaufer, K.
Kawabe, S. Kawamura, F. Kawazoe, D. Kelley, W. Kells, D. G. Keppel, Z.
Keresztes, A. Khalaidovski, F. Y. Khalili, E. A. Khazanov, B. Kim, C. Kim, H.
Kim, K. Kim, N. Kim, Y. -M. Kim, P. J. King, D. L. Kinzel, J. S. Kissel, S.
Klimenko, K. Kokeyama, V. Kondrashov, S. Koranda, W. Z. Korth, I. Kowalska,
D. Kozak, O. Kranz, V. Kringel, S. Krishnamurthy, B. Krishnan, A. Krolak, G.
Kuehn, R. Kumar, P. Kwee, P. K. Lam, M. Landry, B. Lantz, N. Lastzka, C.
Lawrie, A. Lazzarini, P. Leaci, C. H. Lee, H. K. Lee, H. M. Lee, J. R. Leong,
I. Leonor, N. Leroy, N. Letendre, J. Li, T. G. F. Li, N. Liguori, P. E.
Lindquist, Y. Liu, Z. Liu, N. A. Lockerbie, D. Lodhia, M. Lorenzini, V.
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P. Lundgren, E. Macdonald, B. Machenschalk, M. MacInnis, D. M. Macleod, M.
Mageswaran, K. Mailand, E. Majorana, I. Maksimovic, N. Man, I. Mandel, V.
Mandic, M. Mantovani, A. Marandi, F. Marchesoni, F. Marion, S. Marka, Z.
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Martin, J. N. Marx, K. Mason, A. Masserot, F. Matichard, L. Matone, R. A.
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L. Zhang, W. Zhang, C. Zhao, N. Zotov, M. E. Zucker, J. Zweizig
|
Search for Gravitational Waves from Intermediate Mass Binary Black Holes
|
13 pages, 4 figures: data for plots and archived public version at
https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=62326, see also the
public announcement at http://www.ligo.org/science/Publication-S5IMBH/
| null |
10.1103/PhysRevD.85.102004
|
P1100068
|
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present the results of a weakly modeled burst search for gravitational
waves from mergers of non-spinning intermediate mass black holes (IMBH) in the
total mass range 100--450 solar masses and with the component mass ratios
between 1:1 and 4:1. The search was conducted on data collected by the LIGO and
Virgo detectors between November of 2005 and October of 2007. No plausible
signals were observed by the search which constrains the astrophysical rates of
the IMBH mergers as a function of the component masses. In the most efficiently
detected bin centered on 88+88 solar masses, for non-spinning sources, the rate
density upper limit is 0.13 per Mpc^3 per Myr at the 90% confidence level.
|
[{'version': 'v1', 'created': 'Sat, 28 Jan 2012 22:41:14 GMT'}
{'version': 'v2', 'created': 'Thu, 2 Feb 2012 00:43:18 GMT'}
{'version': 'v3', 'created': 'Wed, 25 Apr 2012 20:08:50 GMT'}]
|
2013-05-30
|
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array(['Talukder', 'D.', ''], dtype=object)
array(['Tanner', 'D. B.', ''], dtype=object)
array(['Tarabrin', 'S. P.', ''], dtype=object)
array(['Taylor', 'J. R.', ''], dtype=object)
array(['Taylor', 'R.', ''], dtype=object)
array(['Thomas', 'P.', ''], dtype=object)
array(['Thorne', 'K. A.', ''], dtype=object)
array(['Thorne', 'K. S.', ''], dtype=object)
array(['Thrane', 'E.', ''], dtype=object)
array(['Thuring', 'A.', ''], dtype=object)
array(['Tokmakov', 'K. V.', ''], dtype=object)
array(['Tomlinson', 'C.', ''], dtype=object)
array(['Toncelli', 'A.', ''], dtype=object)
array(['Tonelli', 'M.', ''], dtype=object)
array(['Torre', 'O.', ''], dtype=object)
array(['Torres', 'C.', ''], dtype=object)
array(['Torrie', 'C. I.', ''], dtype=object)
array(['Tournefier', 'E.', ''], dtype=object)
array(['Travasso', 'F.', ''], dtype=object)
array(['Traylor', 'G.', ''], dtype=object)
array(['Tseng', 'K.', ''], dtype=object)
array(['Ugolini', 'D.', ''], dtype=object)
array(['Vahlbruch', 'H.', ''], dtype=object)
array(['Vajente', 'G.', ''], dtype=object)
array(['Brand', 'J. F. J. van den', ''], dtype=object)
array(['Broeck', 'C. Van Den', ''], dtype=object)
array(['van der Putten', 'S.', ''], dtype=object)
array(['van Veggel', 'A. A.', ''], dtype=object)
array(['Vass', 'S.', ''], dtype=object)
array(['Vasuth', 'M.', ''], dtype=object)
array(['Vaulin', 'R.', ''], dtype=object)
array(['Vavoulidis', 'M.', ''], dtype=object)
array(['Vecchio', 'A.', ''], dtype=object)
array(['Vedovato', 'G.', ''], dtype=object)
array(['Veitch', 'J.', ''], dtype=object)
array(['Veitch', 'P. J.', ''], dtype=object)
array(['Veltkamp', 'C.', ''], dtype=object)
array(['Verkindt', 'D.', ''], dtype=object)
array(['Vetrano', 'F.', ''], dtype=object)
array(['Vicere', 'A.', ''], dtype=object)
array(['Villar', 'A. E.', ''], dtype=object)
array(['Vinet', 'J. -Y.', ''], dtype=object)
array(['Vitale', 'S.', ''], dtype=object)
array(['Vitale', 'S.', ''], dtype=object)
array(['Vocca', 'H.', ''], dtype=object)
array(['Vorvick', 'C.', ''], dtype=object)
array(['Vyatchanin', 'S. P.', ''], dtype=object)
array(['Wade', 'A.', ''], dtype=object)
array(['Wade', 'L.', ''], dtype=object)
array(['Wade', 'M.', ''], dtype=object)
array(['Waldman', 'S. J.', ''], dtype=object)
array(['Wallace', 'L.', ''], dtype=object)
array(['Wan', 'Y.', ''], dtype=object)
array(['Wang', 'M.', ''], dtype=object)
array(['Wang', 'X.', ''], dtype=object)
array(['Wang', 'Z.', ''], dtype=object)
array(['Wanner', 'A.', ''], dtype=object)
array(['Ward', 'R. L.', ''], dtype=object)
array(['Was', 'M.', ''], dtype=object)
array(['Weinert', 'M.', ''], dtype=object)
array(['Weinstein', 'A. J.', ''], dtype=object)
array(['Weiss', 'R.', ''], dtype=object)
array(['Wen', 'L.', ''], dtype=object)
array(['Wessels', 'P.', ''], dtype=object)
array(['West', 'M.', ''], dtype=object)
array(['Westphal', 'T.', ''], dtype=object)
array(['Wette', 'K.', ''], dtype=object)
array(['Whelan', 'J. T.', ''], dtype=object)
array(['Whitcomb', 'S. E.', ''], dtype=object)
array(['White', 'D. J.', ''], dtype=object)
array(['Whiting', 'B. F.', ''], dtype=object)
array(['Wilkinson', 'C.', ''], dtype=object)
array(['Willems', 'P. A.', ''], dtype=object)
array(['Williams', 'L.', ''], dtype=object)
array(['Williams', 'R.', ''], dtype=object)
array(['Willke', 'B.', ''], dtype=object)
array(['Winkelmann', 'L.', ''], dtype=object)
array(['Winkler', 'W.', ''], dtype=object)
array(['Wipf', 'C. C.', ''], dtype=object)
array(['Wiseman', 'A. G.', ''], dtype=object)
array(['Wittel', 'H.', ''], dtype=object)
array(['Woan', 'G.', ''], dtype=object)
array(['Wooley', 'R.', ''], dtype=object)
array(['Worden', 'J.', ''], dtype=object)
array(['Yakushin', 'I.', ''], dtype=object)
array(['Yamamoto', 'H.', ''], dtype=object)
array(['Yamamoto', 'K.', ''], dtype=object)
array(['Yamamoto', 'K.', ''], dtype=object)
array(['Yancey', 'C. C.', ''], dtype=object)
array(['Yang', 'H.', ''], dtype=object)
array(['Yeaton-Massey', 'D.', ''], dtype=object)
array(['Yoshida', 'S.', ''], dtype=object)
array(['Yu', 'P.', ''], dtype=object)
array(['Yvert', 'M.', ''], dtype=object)
array(['Zadrozny', 'A.', ''], dtype=object)
array(['Zanolin', 'M.', ''], dtype=object)
array(['Zendri', 'J. -P.', ''], dtype=object)
array(['Zhang', 'F.', ''], dtype=object)
array(['Zhang', 'L.', ''], dtype=object)
array(['Zhang', 'W.', ''], dtype=object)
array(['Zhao', 'C.', ''], dtype=object)
array(['Zotov', 'N.', ''], dtype=object)
array(['Zucker', 'M. E.', ''], dtype=object)
array(['Zweizig', 'J.', ''], dtype=object)]
|
4,348 |
2208.10873
|
Ana Cristina Ferreira
|
Ahmed Elshafei, Ana Cristina Ferreira and Helena Reis
|
Geodesic completeness of pseudo and holomorphic Riemannian metrics on
Lie groups
|
34 pages, 18 figures
| null | null | null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper is devoted to geodesic completeness of left-invariant metrics for
real and complex Lie groups. We start by establishing the Euler-Arnold
formalism in the holomorphic setting. We study the real Lie group
$\mathrm{SL}(2, \mathbb{R})$ and reobtain the known characterization of
geodesic completeness and, in addition, present a detailed study where we
investigate the maximum domain of definition of every single geodesic for every
possible metric. We investigate completeness and semicompleteness of the
complex geodesic flow for left-invariant holomorphic metrics and, in
particular, establish a full classification for the Lie group $\mathrm{SL}(2,
\mathbb{C})$.
|
[{'version': 'v1', 'created': 'Tue, 23 Aug 2022 11:08:16 GMT'}]
|
2022-08-24
|
[array(['Elshafei', 'Ahmed', ''], dtype=object)
array(['Ferreira', 'Ana Cristina', ''], dtype=object)
array(['Reis', 'Helena', ''], dtype=object)]
|
4,349 |
0908.1123
|
Vladimir Kassandrov
|
Vladimir V. Kassandrov
|
A nonstationary generalization of the Kerr congruence
|
6 pages, twocolumn
|
Grav.Cosmol.15:213-219,2009
|
10.1134/S0202289309030037
| null |
gr-qc hep-th math-ph math.DG math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Making use of the Kerr theorem for shear-free null congruences and of
Newman's representation for a virtual charge ``moving'' in complex space-time,
we obtain an axisymmetric time-dependent generalization of the Kerr congruence,
with a singular ring uniformly contracting to a point and expanding then to
infinity. Electromagnetic and complex eikonal field distributions are naturally
associated with the obtained congruence, with electric charge being
necesssarily unit (``elementary''). We conjecture that the corresponding
solution to the Einstein-Maxwell equations could describe the process of
continious transition of the naked ringlike singularitiy into a rotating black
hole and vice versa, under a particular current radius of the singular ring.
|
[{'version': 'v1', 'created': 'Fri, 7 Aug 2009 21:15:28 GMT'}]
|
2009-10-29
|
[array(['Kassandrov', 'Vladimir V.', ''], dtype=object)]
|
4,350 |
2109.13380
|
Gergely Barcza
|
Zsolt Benedek, Paula T\'im\'ar, Tibor Szilv\'asi, Gergely Barcza
|
Sensitivity of Coupled Cluster Electronic Properties on the Reference
Determinant: Can Kohn-Sham Orbitals Be More Beneficial than Hartree-Fock
Orbitals?
|
15 pages,7 figures
| null | null | null |
physics.chem-ph
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
Coupled cluster calculations are traditionally performed over Hartree-Fock
reference orbitals (HF-CC methodology). However, it has been repeatedly argued
in the literature that the use of a Kohn-Sham reference (KS-CC methodology)
might result in improved performance relative to HF-CC at the same
computational cost. In the present theoretical study, we re-examine the
relation of HF-CC and KS-CC methods by comparing the results of widely applied
truncated CC calculations (CCSD, CCSD(T), CCSDT) to the limit of full
configuration interaction (FCI), which in contrast to wave-function diagnostics
with vague physical meaning or experimental data with considerable uncertainty
serves as an undebatable reference point of accuracy. We find that apart from
incidental exceptions, the Kohn-Sham referenced CC methods show systematic
deterioration compared to HF-CC, that is, the KS-CC molecular properties
(electronic energy and density) are always farther from the FCI limit than
those obtained from HF-CC at the same coupled cluster level. Furthermore, the
introduction of common approximations (frozen core, density fitting) to the CC
calculation results in significantly higher errors in the case of KS reference.
We conclude that the use of KS reference orbitals is not expected to increase
the reliability of low-level CC energetics. Nevertheless, molecular errors from
the components of the studied chemical reaction might fortunately cancel out
resulting in illusory improvement compared to HF-CC. It is also notable that
the choice of reference orbitals has negligible influence on the results at
sufficiently high CC levels which can be estimated by test calculations or by
the magnitude of double amplitudes. Therefore, the application of KS-CC is not
unreasonable as it might bypass the difficulties of HF convergence.
|
[{'version': 'v1', 'created': 'Mon, 27 Sep 2021 22:56:29 GMT'}]
|
2021-09-29
|
[array(['Benedek', 'Zsolt', ''], dtype=object)
array(['Tímár', 'Paula', ''], dtype=object)
array(['Szilvási', 'Tibor', ''], dtype=object)
array(['Barcza', 'Gergely', ''], dtype=object)]
|
4,351 |
0710.0442
|
Pablo Shmerkin
|
Antti Kaenmaki and Pablo Shmerkin
|
Overlapping self-affine sets of Kakeya type
|
27 pages, 1 figure. Submitted October 2007
|
Ergodic Theory Dynam. Systems 29 (2009), no. 3, 941-965
|
10.1017/S0143385708080474
| null |
math.CA math.DS
| null |
We compute the Minkowski dimension for a family of self-affine sets on the
plane. Our result holds for every (rather than generic) set in the class.
Moreover, we exhibit explicit open subsets of this class where we allow
overlapping, and do not impose any conditions on the norms of the linear maps.
The family under consideration was inspired by the theory of Kakeya sets.
|
[{'version': 'v1', 'created': 'Tue, 2 Oct 2007 06:36:59 GMT'}]
|
2017-02-03
|
[array(['Kaenmaki', 'Antti', ''], dtype=object)
array(['Shmerkin', 'Pablo', ''], dtype=object)]
|
4,352 |
0807.4598
|
Vali Bashiry
|
K. Zeynali, V. Bashiry
|
Exclusive $B \rar \rho \ell^+ \ell^-$ Decay in the Standard Model with
Fourth--Generation
|
17 pages, 7 figures
|
Phys.Rev.D78:033001,2008
|
10.1103/PhysRevD.78.033001
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the influence of the fourth generation of quarks on the
branching ratio, the CP-asymmetry and the polarization asymmetries in $B \rar
\rho \ell^+ \ell^-$ decay. Taking $|V_{t'd}V_{t'b}|\sim 0.001$ with phase about
$10^\circ$, which is consistent with the $sin2\phi_1$ of the CKM and the $B_d$
mixing parameter $\Delta m_{B_d}$, we obtain that for both ($\mu, \tau$)
channels the branching ratio is increased and the magnitude of CP-asymmetry and
polarization asymmetries decreased by the mass and mixing parameters of the 4th
generation of quarks . These results can serve as a good tool to search for new
physics effects, precisely, to search for the fourth generation of quarks($t',
b')$ via its indirect manifestations in loop diagrams.
|
[{'version': 'v1', 'created': 'Tue, 29 Jul 2008 08:11:01 GMT'}]
|
2008-11-26
|
[array(['Zeynali', 'K.', ''], dtype=object)
array(['Bashiry', 'V.', ''], dtype=object)]
|
4,353 |
1104.1258
|
T.R.S. Prasanna
|
T. R. S. Prasanna
|
Physical meaning of the Ewald sum method
|
18 pages submitted for publication
|
Philosophical Magazine Letters, vol.92 (2012) 29-37
|
10.1080/09500839.2011.622725
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The electrostatic potential and energy of point charges in a real crystal, in
the presence of thermal vibrations, is obtained as a special case of the
Fourier method. Incorporating the role of thermal vibrations in electrostatic
energy calculations leads to the physical meaning of the Ewald sum method. The
Ewald summation method determines the electrostatic potential and energy of
point charges in a crystal at a temperature that is obtained from the width of
the Gaussian and not at 0 K. For values of the width of the Gaussian commonly
recommended for computational convenience temperatures exceed 10000 K.
|
[{'version': 'v1', 'created': 'Thu, 7 Apr 2011 07:39:19 GMT'}]
|
2012-01-31
|
[array(['Prasanna', 'T. R. S.', ''], dtype=object)]
|
4,354 |
1607.00254
|
El Maati Ouhabaz
|
Mahdi Achache (IMB), El Maati Ouhabaz (UB, IMB)
|
Non-autonomous right and left multiplicative perturbations and maximal
regularity
| null | null | null | null |
math.AP math.FA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the problem of maximal regularity for non-autonomous Cauchy
problems $u'(t) + B(t)A(t)u(t) + P(t)u(t) = f(t), u(0) = u_0$ and $u'(t) +
A(t)B(t)u(t) + P(t)u(t) = f (t), u(0) = u_0$. In both cases, the time dependent
operators $A(t)$ are associated with a family of sesquilinear forms and the
multiplicative left or right perturbations $B(t)$ as well as the additive
perturbation $P(t)$ are families of bounded operators on the considered Hilbert
space. We prove maximal $L_p$-regularity results and other regularity
properties for the solutions of the previous problems under minimal regularity
assumptions on the forms and perturbations.
|
[{'version': 'v1', 'created': 'Fri, 1 Jul 2016 14:13:37 GMT'}]
|
2016-08-22
|
[array(['Achache', 'Mahdi', '', 'IMB'], dtype=object)
array(['Ouhabaz', 'El Maati', '', 'UB, IMB'], dtype=object)]
|
4,355 |
2203.01746
|
Thang N. Dinh
|
Phuc Thai, My T. Thai, Tam Vu, Thang N. Dinh
|
SaPHyRa: A Learning Theory Approach to Ranking Nodes in Large Networks
|
To appear in IEEE ICDE'22
| null | null | null |
cs.SI
|
http://creativecommons.org/licenses/by/4.0/
|
Ranking nodes based on their centrality stands a fundamental, yet,
challenging problem in large-scale networks. Approximate methods can quickly
estimate nodes' centrality and identify the most central nodes, but the ranking
for the majority of remaining nodes may be meaningless. For example, ranking
for less-known websites in search queries is known to be noisy and unstable. To
this end, we investigate a new node ranking problem with two important
distinctions: a) ranking quality, rather than the centrality estimation
quality, as the primary objective; and b) ranking only nodes of interest, e.g.,
websites that matched search criteria. We propose Sample space Partitioning
Hypothesis Ranking, or SaPHyRa, that transforms node ranking into a hypothesis
ranking in machine learning. This transformation maps nodes' centrality to the
expected risks of hypotheses, opening doors for theoretical machine learning
(ML) tools. The key of SaPHyRa is to partition the sample space into exact and
approximate subspaces. The exact subspace contains samples related to the nodes
of interest, increasing both estimation and ranking qualities. The approximate
space can be efficiently sampled with ML-based techniques to provide
theoretical guarantees on the estimation error. Lastly, we present SaPHyRa_bc,
an illustration of SaPHyRa on ranking nodes' betweenness centrality (BC). By
combining a novel bi-component sampling, a 2-hop sample partitioning, and
improved bounds on the Vapnik-Chervonenkis dimension, SaPHyRa_bc can
effectively rank any node subset in BC. Its performance is up to 200x faster
than state-of-the-art methods in approximating BC, while its rank correlation
to the ground truth is improved by multifold.
|
[{'version': 'v1', 'created': 'Thu, 3 Mar 2022 14:42:09 GMT'}]
|
2022-03-04
|
[array(['Thai', 'Phuc', ''], dtype=object)
array(['Thai', 'My T.', ''], dtype=object)
array(['Vu', 'Tam', ''], dtype=object)
array(['Dinh', 'Thang N.', ''], dtype=object)]
|
4,356 |
hep-ph/0405131
|
Ramazan Sever
|
Aytekin Aydemir, Kerem Cankocak and Ramazan Sever
|
The Effect of Supersymmetric CP Phases on qq-bar Annihilations
|
23 papes
|
Mod.Phys.Lett. A19 (2004) 1297-1314
|
10.1142/S0217732304013635
| null |
hep-ph
| null |
We compute the rates for $q \bar{q}$ annihilation into charginos and
neutralinos by taking into account the effects of supersymmetric soft phases.
In particular, the phase of the $\mu$ parameter gains direct accessibility via
the production of dissimilar charginos and neutralinos. The phases of the
trilinear soft masses do not have a significant effect on the cross sections.
Our results can be important for sparticle searches at the LHC.
|
[{'version': 'v1', 'created': 'Fri, 14 May 2004 07:55:44 GMT'}]
|
2009-11-10
|
[array(['Aydemir', 'Aytekin', ''], dtype=object)
array(['Cankocak', 'Kerem', ''], dtype=object)
array(['Sever', 'Ramazan', ''], dtype=object)]
|
4,357 |
astro-ph/0402031
|
Malcolm Coe
|
M.J. Coe (Southampton University) and W.R.T. Edge (Southampton
University)
|
AX J0049.4-7323 - a close look at a neutron star interacting with a
circumstellar disk
|
4 pages, accepted for publication in MNRAS
|
Mon.Not.Roy.Astron.Soc. 350 (2004) 756
|
10.1111/j.1365-2966.2004.07696.x
| null |
astro-ph
| null |
Detailed evidence on the system AX J0049.4-7323 is presented here to show how
the passage of the neutron star in the binary system disrupts the circumstellar
disk of the mass donor Be star. A similar effect is noted in three other
Be/X-ray binary systems. Together the observational data should provide
valuable tools for modelling these complex interactions.
|
[{'version': 'v1', 'created': 'Mon, 2 Feb 2004 09:54:58 GMT'}]
|
2009-11-10
|
[array(['Coe', 'M. J.', '', 'Southampton University'], dtype=object)
array(['Edge', 'W. R. T.', '', 'Southampton\n University'], dtype=object)]
|
4,358 |
2112.10205
|
Stefano Longhi
|
Stefano Longhi
|
Bulk-edge correspondence and trapping at a non-Hermitian topological
interface
|
5 pages, 4 figures
|
Opt. Lett. 46, 6107-61010 (2021)
|
10.1364/OL.445437
| null |
physics.optics cond-mat.str-el quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In Hermitian systems, according to the bulk-edge correspondence interfacing
two topological optical media with different bulk topological numbers implies
the existence of edge states, which can trap light at the interface. However,
such a general scenario can be violated when dealing with non-Hermitian
systems. Here we show that interfacing two semi-infinite Hatano-Nelson chains
with different bulk topological numbers can result in the existence of
infinitely many edge (interface) states, however light waves cannot be rather
generally trapped at the interface.
|
[{'version': 'v1', 'created': 'Sun, 19 Dec 2021 17:36:38 GMT'}]
|
2021-12-21
|
[array(['Longhi', 'Stefano', ''], dtype=object)]
|
4,359 |
1708.02208
|
Ernest Ma
|
Ernest Ma and G. Rajasekaran
|
Cobimaximal Neutrino Mixing from $A_4$ and its Possible Deviation
|
10 pages, no figure
| null |
10.1209/0295-5075/119/31001
|
UCRHEP-T583 (Aug 2017)
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It has recently been shown that the phenomenologically successful pattern of
cobimaximal neutrino mixing ($\theta_{13} \neq 0$, $\theta_{23} = \pi/4$, and
$\delta_{CP} = \pm \pi/2$) may be achieved in the context of the non-Abelian
discrete symmetry $A_4$, if the neutrino mass matrix is diagonalized by an
orthogonal matrix ${\cal O}$. We study how this pattern would deviate if ${\cal
O}$ is replaced by an unitary matrix.
|
[{'version': 'v1', 'created': 'Mon, 7 Aug 2017 17:16:16 GMT'}]
|
2017-10-25
|
[array(['Ma', 'Ernest', ''], dtype=object)
array(['Rajasekaran', 'G.', ''], dtype=object)]
|
4,360 |
2007.04678
|
Timothy Callemein
|
Timothy Callemein, Kristof Van Beeck, and Toon Goedem\'e
|
How low can you go? Privacy-preserving people detection with an
omni-directional camera
| null | null |
10.5220/0007573206300637
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, we use a ceiling-mounted omni-directional camera to detect
people in a room. This can be used as a sensor to measure the occupancy of
meeting rooms and count the amount of flex-desk working spaces available. If
these devices can be integrated in an embedded low-power sensor, it would form
an ideal extension of automated room reservation systems in office
environments. The main challenge we target here is ensuring the privacy of the
people filmed. The approach we propose is going to extremely low image
resolutions, such that it is impossible to recognise people or read potentially
confidential documents. Therefore, we retrained a single-shot low-resolution
person detection network with automatically generated ground truth. In this
paper, we prove the functionality of this approach and explore how low we can
go in resolution, to determine the optimal trade-off between recognition
accuracy and privacy preservation. Because of the low resolution, the result is
a lightweight network that can potentially be deployed on embedded hardware.
Such embedded implementation enables the development of a decentralised smart
camera which only outputs the required meta-data (i.e. the number of persons in
the meeting room).
|
[{'version': 'v1', 'created': 'Thu, 9 Jul 2020 10:10:23 GMT'}]
|
2020-07-10
|
[array(['Callemein', 'Timothy', ''], dtype=object)
array(['Van Beeck', 'Kristof', ''], dtype=object)
array(['Goedemé', 'Toon', ''], dtype=object)]
|
4,361 |
1808.05986
|
Adetunmise Dada
|
Adetunmise C. Dada, Will McCutcheon, Erika Andersson, Jonathan
Crickmore, Ittoop Puthoor, Brian D. Gerardot, Alex McMillan, John Rarity, and
Ruth Oulton
|
Optimal simultaneous measurements of incompatible observables of a
single photon
|
7 pages, 6 figures
| null | null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Joint or simultaneous measurements of non-commuting quantum observables are
possible at the cost of increased unsharpness or measurement uncertainty. Many
different criteria exist for defining what an "optimal" joint measurement is,
with corresponding different tradeoff relations for the measurements.
Understanding the limitations of such measurements is of fundamental interest
and relevant for quantum technology. Here, we experimentally test a tradeoff
relation for the sharpness of qubit measurements, a relation which refers
directly to the form of the measurement operators, rather than to errors in
estimates. We perform the first optical implementation of the simplest possible
optimal joint measurement, requiring less quantum resources than have
previously often been employed. Using a heralded single-photon source, we
demonstrate quantum-limited performance of the scheme on single quanta.
|
[{'version': 'v1', 'created': 'Fri, 17 Aug 2018 20:33:31 GMT'}]
|
2018-08-21
|
[array(['Dada', 'Adetunmise C.', ''], dtype=object)
array(['McCutcheon', 'Will', ''], dtype=object)
array(['Andersson', 'Erika', ''], dtype=object)
array(['Crickmore', 'Jonathan', ''], dtype=object)
array(['Puthoor', 'Ittoop', ''], dtype=object)
array(['Gerardot', 'Brian D.', ''], dtype=object)
array(['McMillan', 'Alex', ''], dtype=object)
array(['Rarity', 'John', ''], dtype=object)
array(['Oulton', 'Ruth', ''], dtype=object)]
|
4,362 |
2010.00016
|
Frank Marsiglio
|
Asadullah Bhuiyan and Frank Marsiglio
|
Edge Localized Schr\"odinger Cat States in Finite Lattices via Periodic
Driving
|
16 pages, 13 figures, 3 appendices
|
Phys. Rev. B 102, 245302-1-14 (2020)
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.102.245302
|
10.1103/PhysRevB.102.245302
| null |
cond-mat.mes-hall quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Floquet states have been used to describe the impact of periodic driving on
lattice systems, either using a tight-binding model, or by using a continuum
model where a Kronig-Penney-like description has been used to model spatially
periodic systems in one dimension. A number of these studies have focused on
finite systems, and results from these studies are distinct from those of
infinite lattice systems as a consequence of boundary effects. In the case of a
finite system, there remains a discrepancy in the results between tight-binding
descriptions and continuous lattice models. Periodic driving by a
time-dependent field in tight-binding models results in a collapse of all
quasienergies within a band at special driving amplitudes. In the continuum
model, on the other hand, a pair of nearly-degenerate edge bands emerge and
remain gapped from the bulk bands as the field amplitude increases. We resolve
these discrepancies and explain how these edge bands represent Schr\"odinger
cat-like states with effective tunneling across the entire lattice. Moreover,
we show that these extended cat-like states become perfectly localized at the
edge sites when the external driving amplitude induces a collapse of the bulk
bands.
|
[{'version': 'v1', 'created': 'Wed, 30 Sep 2020 18:00:02 GMT'}]
|
2021-10-05
|
[array(['Bhuiyan', 'Asadullah', ''], dtype=object)
array(['Marsiglio', 'Frank', ''], dtype=object)]
|
4,363 |
0902.3887
|
Mauro Spreafico
|
L. Hartmann and M. Spreafico
|
The analytic torsion of a cone over a sphere
| null | null |
10.1016/j.matpur.2009.11.001
| null |
math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We compute the analytic torsion of a cone over a sphere of dimension 1, 2,
and 3, and we conjecture a general formula for the cone over an odd dimensional
sphere.
|
[{'version': 'v1', 'created': 'Mon, 23 Feb 2009 10:49:14 GMT'}]
|
2012-10-12
|
[array(['Hartmann', 'L.', ''], dtype=object)
array(['Spreafico', 'M.', ''], dtype=object)]
|
4,364 |
math/9907001
|
Kota Yoshioka
|
Kota Yoshioka
|
Irreducibility of moduli spaces of vector bundles on K3 surfaces
|
21 pages, one section is added
| null | null | null |
math.AG
| null |
In this paper, we show the moduli spaces of stable sheaves on K3 surfaces are
irreducible symplectic manifolds, if the associated Mukai vectors are
primitive. More precisely, we show that they are related to the Hilbert scheme
of points. We also compute the period of these spaces. As an application of our
result, we discuss Montonen-Olive duality in Physics. In particular our
computations of Euler characteristics of moduli spaces are compatible with
Physical computations by Minahan et al.
|
[{'version': 'v1', 'created': 'Thu, 1 Jul 1999 09:22:48 GMT'}
{'version': 'v2', 'created': 'Mon, 7 Feb 2000 07:58:01 GMT'}]
|
2007-05-23
|
[array(['Yoshioka', 'Kota', ''], dtype=object)]
|
4,365 |
1006.2018
|
Toyoaki Suzuki
|
T. Suzuki, H. Kaneda, T. Onaka, T. Nakagawa, H. Shibai
|
Kiloparsec-scale star formation law in M81 and M101 based on AKARI
far-infrared observations
|
12 pages, 8 figures, accepted for publication in A&A
| null |
10.1051/0004-6361/201014529
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We assess the relationships between the surface densities of the gas and star
formation rate (SFR) within spiral arms of the nearby late-type spiral galaxies
M81 and M101. By analyzing these relationships locally, we derive empirically a
kiloparsec scale Kennicutt-Schmidt Law. Both M81 and M101 were observed with
the Far-Infrared Surveyor (FIS) aboard AKARI in four far-infrared bands at 65,
90, 140, and 160 um. The spectral energy distributions of the whole galaxies
show the presence of the cold dust component (Tc~20 K) in addition to the warm
dust component (Tw~60 K). We deconvolved the cold and warm dust emission
components spatially by making the best use of the multi-band photometric
capability of the FIS. The cold and warm dust components show power-law
correlations in various regions, which can be converted into the gas mass and
the SFR, respectively. We find a power-law correlation between the gas and SFR
surface densities with significant differences in the power law index N between
giant HII regions (N=1.0) and spiral arms (N=2.2) in M101. The power-law index
for spiral arms in M81 is similar (N=1.9) to that of spiral arms in M101.
Conclusions: The power-law index is not always constant within a galaxy. The
difference in the power-law index can be attributed to the difference in the
star formation processes on a kiloparsec scale. N~2 seen in the spiral arms in
M81 and M101 supports the scenario of star formation triggered by cloud-cloud
collisions enhanced by spiral density wave, while N~1 derived in giant HII
regions in M101 suggests the star formation induced by the Parker instability
triggered by high velocity HI gas infall. The present method can be applied to
a large galaxy sample for which the AKARI All Sky Survey provides the same 4
far-infrared band data.
|
[{'version': 'v1', 'created': 'Thu, 10 Jun 2010 12:47:40 GMT'}]
|
2015-05-19
|
[array(['Suzuki', 'T.', ''], dtype=object)
array(['Kaneda', 'H.', ''], dtype=object)
array(['Onaka', 'T.', ''], dtype=object)
array(['Nakagawa', 'T.', ''], dtype=object)
array(['Shibai', 'H.', ''], dtype=object)]
|
4,366 |
cond-mat/0703793
|
Elisabeth Soergel Dr
|
T. Jungk, A. Hoffmann, and E. Soergel
|
Impact of the tip radius on the lateral resolution in piezoresponse
force microscopy
| null |
New J. Phys. 10, 013019 (2008)
|
10.1088/1367-2630/10/1/013019
| null |
cond-mat.mtrl-sci
| null |
We present a quantitative investigation of the impact of tip radius as well
as sample type and thickness on the lateral resolution in piezoresponse force
microscopy (PFM) investigating bulk single crystals. The observed linear
dependence of the width of the domain wall on the tip radius as well as the
independence of the lateral resolution on the specific crystal-type are
validated by a simple theoretical model. Using a Ti-Pt-coated tip with a
nominal radius of 15 nm the so far highest lateral resolution in bulk crystals
of only 17 nm was obtained.
|
[{'version': 'v1', 'created': 'Fri, 30 Mar 2007 14:32:36 GMT'}]
|
2009-11-13
|
[array(['Jungk', 'T.', ''], dtype=object)
array(['Hoffmann', 'A.', ''], dtype=object)
array(['Soergel', 'E.', ''], dtype=object)]
|
4,367 |
gr-qc/9709043
|
G. Kunstatter
|
G. Kunstatter, R. Petryk and S. Shelemy (U. of Winnipeg)
|
Hamiltonian Thermodynamics of Black Holes in Generic 2-D Dilaton Gravity
|
25 pages Revtex including 7 (eps) figures
|
Phys.Rev.D57:3537-3547,1998
|
10.1103/PhysRevD.57.3537
| null |
gr-qc hep-th
| null |
We consider the Hamiltonian mechanics and thermodynamics of an eternal black
hole in a box of fixed radius and temperature in generic 2-D dilaton gravity.
Imposing boundary conditions analoguous to those used by Louko and Whiting for
spherically symmetric gravity, we find that the reduced Hamiltonian generically
takes the form: $$ H(M,\phi_+) = \sigma_0 E(M,\phi_+) -{N_0\over 2\pi} S(M) $$
where $E(M,\phi_+)$ is the quasilocal energy of a black hole of mass $M$ inside
a static box (surface of fixed dilaton field $\phi_+$) and $S(M)$ is the
associated classical thermodynamical entropy. $\sigma_0$ and $N_0$ determine
time evolution along the world line of the box and boosts at the bifurcation
point, respectively. An ansatz for the quantum partition function is obtained
by fixing $\sigma_0$ and $N_0$ and then tracing the operator $e^{-\beta H}$
over mass eigenstates. We analyze this partition function in some detail both
generically and for the class of dilaton gravity theories that is obtained by
dimensional reduction of Einstein gravity in n+2 dimensions with $S^n$
spherical symmetry.
|
[{'version': 'v1', 'created': 'Tue, 16 Sep 1997 21:01:17 GMT'}]
|
2014-11-17
|
[array(['Kunstatter', 'G.', '', 'U. of Winnipeg'], dtype=object)
array(['Petryk', 'R.', '', 'U. of Winnipeg'], dtype=object)
array(['Shelemy', 'S.', '', 'U. of Winnipeg'], dtype=object)]
|
4,368 |
2305.07115
|
Rabia Hameed
|
Rabia Hameed and Sidra Nosheen
|
Relationship between the 2n-points binary and (3n-1)-points quaternary
approximating subdivision schemes
|
36 pages, 28 figures
| null | null | null |
math.GM
|
http://creativecommons.org/licenses/by/4.0/
|
Geometric objects are primarily represented using curves and surfaces and the
subdivision schemes are the basic tools for these representations. This study
is based on a new thought that there is a special relation between the binary
and some kinds of the quaternary subdivision schemes. Due to the defined
relation the quaternary subdivision schemes can also be formulated by the
binary subdivision schemes. This study presents the generalized formula in
compact form that contains the subdivision rules of (3n-1)-point quaternary
approximating subdivision scheme which are based on the predefined 2n-points
binary approximating subdivision scheme. Firstly, we derive a relation between
the quaternary approximating subdivision scheme and the even-point binary
approximating subdivision scheme. By using this relation, we next derive two
types of generalized quaternary approximating subdivision scheme that are based
on the even and odd values of n. Then we apply these generalized formulas on
the known binary schemes for specific values of $n$. This gives us the
corresponding quaternary approximating subdivision schemes. We also analyze
some of the well-known features of binary and its corresponding quaternary
approximating subdivision schemes. These results are equally applicable on
parametric and non-parametric subdivision schemes.
|
[{'version': 'v1', 'created': 'Fri, 28 Apr 2023 08:34:08 GMT'}]
|
2023-05-15
|
[array(['Hameed', 'Rabia', ''], dtype=object)
array(['Nosheen', 'Sidra', ''], dtype=object)]
|
4,369 |
hep-th/9712193
|
Sandip Trivedi
|
J. Lykken, E. Poppitz and S.P. Trivedi
|
M(ore) on Chiral Gauge Theories from D-Branes
|
27 pages, One Figure, Latex
|
Nucl.Phys. B520 (1998) 51-74
|
10.1016/S0550-3213(98)00186-2
|
Fermilab-Pub-97/425-T, UCSD-PTH-97-37
|
hep-th
| null |
We consider a brane configuration consisting of intersecting Neveu-Schwarz
five-branes, Dirichlet four-branes, and an orientifold four-plane in a C^2/Z_3
orbifold background. We show that the low-energy dynamics is described by a
four dimensional gauge theory with N=1 supersymmetry and SO(N+4) X SU(N) or
SP(2M) X SU(2M+4) gauge symmetry. The matter content of this theory is chiral.
In particular, the SU group has one matter field in the antisymmetric tensor or
symmetric tensor representation and several fields in the fundamental and
antifundamental representations. We discuss various consistency checks on these
theories. By considering the brane configuration in M theory we deduce the
spectral curves for these theories. Finally, we consider the effects of
replacing the orbifold background with a non-singular ALE space (both with and
without an orientifold plane) and show that it leaves the spectral curves
unchanged.
|
[{'version': 'v1', 'created': 'Fri, 19 Dec 1997 21:29:45 GMT'}]
|
2009-10-30
|
[array(['Lykken', 'J.', ''], dtype=object)
array(['Poppitz', 'E.', ''], dtype=object)
array(['Trivedi', 'S. P.', ''], dtype=object)]
|
4,370 |
hep-ph/0303092
|
David Rainwater
|
D. Chakraborty (NIU), J. Konigsberg (Florida), D. Rainwater (DESY)
|
Review of Top Quark Physics
|
84 pp. With permission from the Annual Review of Nuclear & Particle
Science. Final version of this material is scheduled to appear in the Annual
Review of Nuclear & Particle Science Vol. 53, to be published in December
2003 by Annual Reviews (http://www.annualreviews.org)
|
Ann.Rev.Nucl.Part.Sci.53:301-351,2003
|
10.1146/annurev.nucl.53.041002.110601
| null |
hep-ph hep-ex
| null |
We present an overview of Top Quark Physics - from what has been learned so
far at the Tevatron, to the searches that lie ahead at present and future
colliders. We summarize the richness of the measurements and discuss their
possible impact on our understanding of the Standard Model by pointing out
their key elements and limitations. When possible, we discuss how the top quark
may provide a connection to new or unexpected physics.
|
[{'version': 'v1', 'created': 'Wed, 12 Mar 2003 13:20:09 GMT'}]
|
2009-07-09
|
[array(['Chakraborty', 'D.', '', 'NIU'], dtype=object)
array(['Konigsberg', 'J.', '', 'Florida'], dtype=object)
array(['Rainwater', 'D.', '', 'DESY'], dtype=object)]
|
4,371 |
2210.08053
|
Junhyeon Kwon
|
Junhyeon Kwon, Yingcai Zheng, Mikyoung Jun
|
Flexible Spatio-Temporal Hawkes Process Models for Earthquake
Occurrences
|
53 pages
| null | null | null |
stat.AP stat.ME
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Hawkes process is one of the most commonly used models for investigating the
self-exciting nature of earthquake occurrences. However, seismicity patterns
have complicated characteristics due to heterogeneous geology and stresses, for
which existing methods with Hawkes process cannot fully capture. This study
introduces novel nonparametric Hawkes process models that are flexible in three
distinct ways. First, we incorporate the spatial inhomogeneity of the
self-excitation earthquake productivity. Second, we consider the anisotropy in
aftershock occurrences. Third, we reflect the space-time interactions between
aftershocks with a non-separable spatio-temporal triggering structure. For
model estimation, we extend the model-independent stochastic declustering
(MISD) algorithm and suggest substituting its histogram-based estimators with
kernel methods. We demonstrate the utility of the proposed methods by applying
them to the seismicity data in regions with active seismic activities.
|
[{'version': 'v1', 'created': 'Fri, 14 Oct 2022 18:44:30 GMT'}
{'version': 'v2', 'created': 'Tue, 14 Feb 2023 17:59:42 GMT'}]
|
2023-02-15
|
[array(['Kwon', 'Junhyeon', ''], dtype=object)
array(['Zheng', 'Yingcai', ''], dtype=object)
array(['Jun', 'Mikyoung', ''], dtype=object)]
|
4,372 |
1211.3125
|
Mauro Sereno
|
N. Radicella, M. Sereno, A. Tartaglia
|
Dark energy as an elastic strain fluid
|
7 pages, 6 figures, in press on MNRAS
| null |
10.1093/mnras/sts400
| null |
astro-ph.CO gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The origin of the accelerated expansion of the universe is still unclear and
new physics is needed on cosmological scales. We propose and test a novel
interpretation of dark energy as originated by an elastic strain due to a
cosmic defect in an otherwise Euclidean space-time. The strain modifies the
expansion history of the universe. This new effective contribution tracks
radiation at early times and mimics a cosmological constant at late times. The
theory is tested against observations, from nucleosynthesis to the cosmic
microwave background and formation and evolution of large scale structure to
supernovae. Data are very well reproduced with Lam\'e parameters of the order
of 10^{-52} m^{-2}.
|
[{'version': 'v1', 'created': 'Tue, 13 Nov 2012 21:00:08 GMT'}]
|
2015-06-12
|
[array(['Radicella', 'N.', ''], dtype=object)
array(['Sereno', 'M.', ''], dtype=object)
array(['Tartaglia', 'A.', ''], dtype=object)]
|
4,373 |
0812.0919
|
Matthias Steinhauser
|
Y. Kiyo, J.H. K\"uhn, S. Moch, M. Steinhauser, P. Uwer
|
Top-quark pair production near threshold at LHC
|
22 pages, 7 figures, minor corrections, references added, EPJC 60
(2009) 375
|
Eur.Phys.J.C60:375-386,2009
|
10.1140/epjc/s10052-009-0892-7
|
DESY 08-169, HU-EP-08/57, SFB/CPP-08-94, TTP08-52
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The next-to-leading order analysis for the cross section for hadroproduction
of top quark pairs close to threshold is presented. Within the framework of
non-relativistic QCD a significant enhancement compared to fixed order
perturbation theory is observed which originates from the characteristic
remnant of the 1S peak below production threshold of top quark pairs. The
analysis includes all color singlet and color octet configurations of top quark
pairs in S-wave states and, for the dominant configurations, it employs
all-order soft gluon resummation for the hard parton cross section. Numerical
results for the Large Hadron Collider at $\sqrt{s} = 14 $TeV and $\sqrt{s} = 10
$TeV and also for the Tevatron are presented. The possibility of a top quark
mass measurement from the invariant mass distribution of top quark pairs is
discussed.
|
[{'version': 'v1', 'created': 'Thu, 4 Dec 2008 12:15:34 GMT'}
{'version': 'v2', 'created': 'Mon, 30 Mar 2009 15:09:48 GMT'}]
|
2009-03-30
|
[array(['Kiyo', 'Y.', ''], dtype=object)
array(['Kühn', 'J. H.', ''], dtype=object)
array(['Moch', 'S.', ''], dtype=object)
array(['Steinhauser', 'M.', ''], dtype=object)
array(['Uwer', 'P.', ''], dtype=object)]
|
4,374 |
quant-ph/0610028
|
Daniel A. Lidar
|
A. Shabani and D.A. Lidar (USC)
|
Quantum Error Correction Beyond Completely Positive Maps
|
This paper has been withdrawn as it has been superseded by
arXiv:0808.0175 and arXiv:0902.2478
| null | null | null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
By introducing an operator sum representation for arbitrary linear maps, we
develop a generalized theory of quantum error correction (QEC) that applies to
any linear map, in particular maps that are not completely positive (CP). This
theory of "linear quantum error correction" is applicable in cases where the
standard and restrictive assumption of a factorized initial system-bath state
does not apply.
|
[{'version': 'v1', 'created': 'Thu, 5 Oct 2006 19:56:43 GMT'}
{'version': 'v2', 'created': 'Tue, 10 Oct 2006 17:02:36 GMT'}
{'version': 'v3', 'created': 'Thu, 18 Jan 2007 20:12:44 GMT'}
{'version': 'v4', 'created': 'Wed, 21 Oct 2009 20:24:57 GMT'}]
|
2009-10-21
|
[array(['Shabani', 'A.', '', 'USC'], dtype=object)
array(['Lidar', 'D. A.', '', 'USC'], dtype=object)]
|
4,375 |
1407.7009
|
Roman Matsyuk
|
Roman Matsyuk
|
Variational generalization of free relativistic top
|
in Ukrainian
|
Collected Physical Papers. Shevchenko Scientific Society, Vol. 6
(2006) 206-214. ISSN 1563-3969
| null | null |
gr-qc math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove that well known first-order (in spin, momentum, and space-time
coordinates) equations of motion of relativistic top are equivalent to the
third-order equations of Mathisson on the surface of the Mathisson-Pirani
auxiliary constraint. We then consider these third-order equations in flat
space-time with constant spin 4-vector and invent a Lagrange function for them.
Allowing physical interpretation to be applied to the complete set of extremals
yields a whole spectrum of spin-dependent effective 'proper mass' of the
relativistic top.
|
[{'version': 'v1', 'created': 'Fri, 25 Jul 2014 19:18:15 GMT'}]
|
2014-07-28
|
[array(['Matsyuk', 'Roman', ''], dtype=object)]
|
4,376 |
physics/0601149
|
Nick Linthorne Dr
|
Nicholas P. Linthorne and David J. Everett
|
Release angle for attaining maximum distance in the soccer throw-in
|
Submitted to Sports Biomechanics. 19 pages, 8 figures
| null | null | null |
physics.pop-ph
| null |
We investigated the release angle that maximises the distance attained in a
long soccer throw-in. One male soccer player performed maximum-effort throws
using release angles of between 10 and 60 degrees, and the throws were analysed
using 2-D video. The player's optimum release angle was calculated by
substituting mathematical expressions for the measured relations between
release speed, release height, and release angle into the equations for the
flight of a spherical projectile. We found that the musculoskeletal structure
of the player's body had a strong influence on the optimum release angle. When
using low release angles the player released the ball with a greater release
speed, and because the range of a projectile is strongly dependent on the
release speed, this bias toward low release angles reduced the optimum release
angle to about 30 degrees. Calculations showed that the distance of a throw may
be increased by a few metres by launching the ball with a fast backspin, but
the ball must be launched at a slightly lower release angle.
|
[{'version': 'v1', 'created': 'Fri, 20 Jan 2006 00:18:15 GMT'}]
|
2007-05-23
|
[array(['Linthorne', 'Nicholas P.', ''], dtype=object)
array(['Everett', 'David J.', ''], dtype=object)]
|
4,377 |
1510.05154
|
Christopher Gatti
|
Christopher J. Gatti, James D. Brooks, and Sarah G. Nurre
|
A Historical Analysis of the Field of OR/MS using Topic Models
| null | null | null | null |
stat.ML cs.DL stat.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This study investigates the content of the published scientific literature in
the fields of operations research and management science (OR/MS) since the
early 1950s. Our study is based on 80,757 published journal abstracts from 37
of the leading OR/MS journals. We have developed a topic model, using Latent
Dirichlet Allocation (LDA), and extend this analysis to reveal the temporal
dynamics of the field, journals, and topics. Our analysis shows the generality
or specificity of each of the journals, and we identify groups of journals with
similar content, which are both consistent and inconsistent with intuition. We
also show how journals have become more or less unique in their scope. A more
detailed analysis of each journals' topics over time shows significant temporal
dynamics, especially for journals with niche content. This study presents an
observational, yet objective, view of the published literature from OR/MS that
would be of interest to authors, editors, journals, and publishers.
Furthermore, this work can be used by new entrants to the fields of OR/MS to
understand the content landscape, as a starting point for discussions and
inquiry of the field at large, or as a model for other fields to perform
similar analyses.
|
[{'version': 'v1', 'created': 'Sat, 17 Oct 2015 18:52:24 GMT'}]
|
2015-10-20
|
[array(['Gatti', 'Christopher J.', ''], dtype=object)
array(['Brooks', 'James D.', ''], dtype=object)
array(['Nurre', 'Sarah G.', ''], dtype=object)]
|
4,378 |
physics/0611141
|
Qingyou Lu
|
Jihui Wang, Qingyou Lu, Xuefeng Cui, Bing Wang
|
Response-table-based virtual responding method and instrument and their
applications in scanning probe microscopes
|
3 pages, 7 figures
| null | null | null |
physics.ins-det physics.gen-ph
| null |
We describe a virtual response method and device. It consists of an
analog-to-digital converter, a digital-to-analog converter, and a computer and
utilizes a searchable response table (RT) pre-stored in the computer to respond
to electronic signals. The RT is constructed by measuring the input-output
relationship of a real response machine followed by sorting it per input data.
To respond, incoming signal is converted to digital data whose position in the
RT is then located. The response signal is determined by localized numerical
calculation around that position. This method has many advantages: cheap, fast,
universal, stable with less noises and errors.
|
[{'version': 'v1', 'created': 'Wed, 15 Nov 2006 05:07:36 GMT'}]
|
2007-05-23
|
[array(['Wang', 'Jihui', ''], dtype=object)
array(['Lu', 'Qingyou', ''], dtype=object)
array(['Cui', 'Xuefeng', ''], dtype=object)
array(['Wang', 'Bing', ''], dtype=object)]
|
4,379 |
physics/0306192
|
Liang Gang Liu
|
Bao-quan Ai, Xian-ju Wang, Guo-tao Liu, Liang-gang Liu, M. Nakano, H.
Matsuura
|
Sliding Mechanism for Actin Myosin System
|
11 pages, 8 figures
|
INFORMATION, VOL.6 (2003)187-196
| null | null |
physics.bio-ph q-bio
| null |
Based on the Stochastic Inclined Rods Model (SIRM) proposed by H. Matsuura
and M. Nakano, we study the microscopic motion of actin myosin system including
the motion of the G-actin. Our model is composed of an inclined spring (rod), a
myosin head, a myosin filament and G-actins. We discuss the stochastic
resonance between the myosin head and random noise. The results of calculation
show that the model can convert the random motion to one directional motion,
and the myosin head works as a resonator of random noise which absorbs the
energy through the stochastic resonance. The intermolecular potential between
the myosin head and G-actin and the inclined rod play a key role for the
muscle's motion. The energy consumed by the motor is directly supplied from the
surroundings (i.e., the thermal motions of water molecules).
|
[{'version': 'v1', 'created': 'Fri, 27 Jun 2003 12:11:51 GMT'}]
|
2007-05-23
|
[array(['Ai', 'Bao-quan', ''], dtype=object)
array(['Wang', 'Xian-ju', ''], dtype=object)
array(['Liu', 'Guo-tao', ''], dtype=object)
array(['Liu', 'Liang-gang', ''], dtype=object)
array(['Nakano', 'M.', ''], dtype=object)
array(['Matsuura', 'H.', ''], dtype=object)]
|
4,380 |
2004.09552
|
Ioannis Tsinikos
|
Rikkert Frederix and Ioannis Tsinikos
|
Subleading EW corrections and spin-correlation effects in $t\bar{t}W$
multi-lepton signatures
|
12 pages, 6 figures, 1 table
| null | null |
LU-TP 20-19
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently a slight tension between data and predictions has been reported in
$t\bar{t}W$ production by both the CMS and ATLAS collaborations. We revisit the
theoretical predictions for this process, focussing on the following two
effects. We disentangle various effects that lead to asymmetries among the
leptonic decay products of the (anti-)top quarks and $W$ bosons, for which we
find that the spin correlations in the top-quark pair are the dominant source.
We also discuss the impact of the large, formally subleading, electroweak
corrections to $t\bar{t}W$ production at the LHC. We find that this effect
changes the $t\bar{t}W$ cross section significantly in the signature
phase-space regions, and should therefore be included differentially in the
theory to data comparisons.
|
[{'version': 'v1', 'created': 'Mon, 20 Apr 2020 18:15:50 GMT'}]
|
2020-04-22
|
[array(['Frederix', 'Rikkert', ''], dtype=object)
array(['Tsinikos', 'Ioannis', ''], dtype=object)]
|
4,381 |
0706.3189
|
Tunc Erkmen
|
Metin Arik, Tunc Erkmen
|
Exponentially Expanding Radiation Dominated and Dust Dominated Universes
in Brans-Dicke Theory
|
3 pages, 1 figure
| null | null | null |
gr-qc
| null |
The Brans-Dicke Theory of Gravity is one of the most promising alternatives
to the Einstein's Theory of General Relativity. We have examined an action term
with wrong signs for both the kinetic and mass terms for the scalar field and
have found solutions for both the scale factor of the universe and the
Brans-Dicke scalar field which vary exponentially in time.
|
[{'version': 'v1', 'created': 'Thu, 21 Jun 2007 16:47:23 GMT'}]
|
2007-06-22
|
[array(['Arik', 'Metin', ''], dtype=object)
array(['Erkmen', 'Tunc', ''], dtype=object)]
|
4,382 |
1704.08026
|
Ray-Kuang Lee
|
Kou-Bin Hong, Chun-Yan Lin, Tsu-Chi Chang, Wei-Hsuan Liang, Ying-Yu
Lai, Chien-Ming Wu, You-Lin Chuang, Tien-Chang Lu, Claudio Conti, and
Ray-Kuang Lee
|
Lasing on nonlinear localized waves in curved geometry
|
6 pages, 6 figures
| null |
10.1364/OE.25.029068
| null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The use of geometrical constraints opens many new perspectives in photonics
and in fundamental studies of nonlinear waves. By implementing surface
structures in vertical cavity surface emitting lasers as manifolds for curved
space, we experimentally study the impacts of geometrical constraints on
nonlinear wave localization. We observe localized waves pinned to the maximal
curvature in an elliptical-ring, and confirm the reduction in the localization
length of waves by measuring near and far field patterns, as well as the
corresponding dispersion relation. Theoretically, analyses based on a
dissipative model with a parabola curve give good agreement remarkably to
experimental measurement on the transition from delocalized to localized waves.
The introduction of curved geometry allows to control and design lasing modes
in the nonlinear regime.
|
[{'version': 'v1', 'created': 'Wed, 26 Apr 2017 09:15:40 GMT'}]
|
2017-11-22
|
[array(['Hong', 'Kou-Bin', ''], dtype=object)
array(['Lin', 'Chun-Yan', ''], dtype=object)
array(['Chang', 'Tsu-Chi', ''], dtype=object)
array(['Liang', 'Wei-Hsuan', ''], dtype=object)
array(['Lai', 'Ying-Yu', ''], dtype=object)
array(['Wu', 'Chien-Ming', ''], dtype=object)
array(['Chuang', 'You-Lin', ''], dtype=object)
array(['Lu', 'Tien-Chang', ''], dtype=object)
array(['Conti', 'Claudio', ''], dtype=object)
array(['Lee', 'Ray-Kuang', ''], dtype=object)]
|
4,383 |
2007.10845
|
Sergey Kulik
|
Sergey Kulik, Saranya Pullanchery, Sylvie Roke
|
Vibrational sum frequency scattering in absorptive media: A theoretical
case study of nano-objects water
| null | null | null | null |
physics.chem-ph cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The structures of interfaces of nano- and microscale objects in aqueous
solution are important for a wide variety of physical, chemical and biological
processes. Vibrational sum frequency scattering has emerged as a useful and
unique probe of the interfacial structure of nano- and microscale objects in
water. However, the full surface vibrational stretch mode spectrum has not been
measured yet, even though it would be extremely informative to do so. The
reason for this is that probing the vibrational modes of interfacial water
requires a full understanding of how the linear absorptive properties of the
bulk aqueous medium influence the sum frequency scattering process. Here, we
have simulated vibrational sum frequency scattering spectra of the interface of
nanoscale objects dispersed in water. We analyzed the effect of the infrared
pulse absorption on the outcome of surface vibrational sum frequency scattering
measurements. We find that both infrared absorption as well as the type of
optical detection can drastically modify the measured vibrational interfacial
spectrum. The observed changes comprise spectral distortion, frequency shifting
of the main vibrational stretch mode and the introducing of a new high
frequency peak. This last feature is enhanced by non-resonant interactions.
|
[{'version': 'v1', 'created': 'Tue, 21 Jul 2020 14:25:18 GMT'}]
|
2020-07-22
|
[array(['Kulik', 'Sergey', ''], dtype=object)
array(['Pullanchery', 'Saranya', ''], dtype=object)
array(['Roke', 'Sylvie', ''], dtype=object)]
|
4,384 |
1705.02681
|
Jiangfeng Zhou
|
Khagendra Bhattarai, Sinhara Silva, Kun Song, Augustine Urbas, Sang
Jun Lee, Zahyun Ku, Jiangfeng Zhou
|
Metamaterial Perfect Absorber Analyzed by a Meta-cavity Model Consisting
of Multilayer Metasurfaces
| null | null | null | null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We demonstrate that the metamaterial perfect absorber behaves as a
meta-cavity bounded between a resonant metasurface and a metallic thin-film
reflector. The perfect absorption is achieved by the Fabry-Perot cavity
resonance via multiple reflections between the "quasi-open" boundary of
resonator and the "closed" boundary of reflector. The characteristic features
including angle independence, ultra-thin thickness and strong field
localization can be well explained by this model. With this model, metamaterial
perfect absorber can be redefined as a meta-cavity exhibiting high Q-factor,
strong field enhancement and extremely high photonic density of states, thereby
promising novel applications for high performance sensor, infrared
photodetector and cavity quantum electrodynamics devices.
|
[{'version': 'v1', 'created': 'Sun, 7 May 2017 18:49:32 GMT'}]
|
2017-05-09
|
[array(['Bhattarai', 'Khagendra', ''], dtype=object)
array(['Silva', 'Sinhara', ''], dtype=object)
array(['Song', 'Kun', ''], dtype=object)
array(['Urbas', 'Augustine', ''], dtype=object)
array(['Lee', 'Sang Jun', ''], dtype=object)
array(['Ku', 'Zahyun', ''], dtype=object)
array(['Zhou', 'Jiangfeng', ''], dtype=object)]
|
4,385 |
cond-mat/9911372
|
Niels Asger Mortensen
|
Niels Asger Mortensen, Antti-Pekka Jauho, Karsten Flensberg
|
Andreev scattering and conductance enhancement in mesoscopic
semiconductor-superconductor junctions
|
2 pages including 3 figures. Extended abstract for "Electron
Transport in Mesoscopic Systems", 12-15 August 1999, Gotenburg, Sweden (LT22
satelite)
|
Extended abstracts of Electron Transport in Mesoscopic Systems,
pp. 120-121 (1999)
| null | null |
cond-mat.mes-hall cond-mat.supr-con
| null |
An inherent difficulty in studying mesoscopic effects in
semiconductor--superconductor hybrid structures is the large Schottky barrier
which often forms at the interface. A large technological effort has been
invested in in improving the contact between the superconductor and the
two-dimensional electron gas (2DEG) of a semiconductor heterostructure, and in
recent years this has become possible for e.g. GaAs-Al, GaAs-In, and InAs-Nb
junctions. This development motivates quantitative theoretical modeling of
sample-specific transport properties. The aim of our work is to model the
conducting properties of a ballistic 2DEG-S interfaces with a QPC in the normal
region and also to take into account scattering due to a weak Schottky barrier
and/or non-matching Fermi properties of the semiconductor and superconductor.
|
[{'version': 'v1', 'created': 'Tue, 23 Nov 1999 12:18:18 GMT'}]
|
2007-05-23
|
[array(['Mortensen', 'Niels Asger', ''], dtype=object)
array(['Jauho', 'Antti-Pekka', ''], dtype=object)
array(['Flensberg', 'Karsten', ''], dtype=object)]
|
4,386 |
2102.09434
|
G\"ok\c{c}e Dayan{\i}kl{\i}
|
Rene Carmona, Gokce Dayanikli, Mathieu Lauriere
|
Mean Field Models to Regulate Carbon Emissions in Electricity Production
|
29 pages, 6 figures, 6 algorithms, 2 tables
| null | null | null |
math.OC
|
http://creativecommons.org/licenses/by/4.0/
|
The most serious threat to ecosystems is the global climate change fueled by
the uncontrolled increase in carbon emissions. In this project, we use mean
field control and mean field game models to analyze and inform the decisions of
electricity producers on how much renewable sources of production ought to be
used in the presence of a carbon tax. The trade-off between higher revenues
from production and the negative externality of carbon emissions is quantified
for each producer who needs to balance in real time reliance on reliable but
polluting (fossil fuel) thermal power stations versus investing in and
depending upon clean production from uncertain wind and solar technologies. We
compare the impacts of these decisions in two different scenarios: 1) the
producers are competitive and hopefully reach a Nash Equilibrium; 2) they
cooperate and reach a Social Optimum. We first prove that both problems have a
unique solution using forward-backward systems of stochastic differential
equations. We then illustrate with numerical experiments the producers'
behavior in each scenario. We further introduce and analyze the impact of a
regulator in control of the carbon tax policy, and we study the resulting
Stackelberg equilibrium with the field of producers.
|
[{'version': 'v1', 'created': 'Thu, 18 Feb 2021 15:49:55 GMT'}
{'version': 'v2', 'created': 'Sat, 3 Jul 2021 20:23:13 GMT'}]
|
2021-07-06
|
[array(['Carmona', 'Rene', ''], dtype=object)
array(['Dayanikli', 'Gokce', ''], dtype=object)
array(['Lauriere', 'Mathieu', ''], dtype=object)]
|
4,387 |
2203.03416
|
Shun Xu
|
Shun Xu
|
The classification of $n$-dimensional nilpotent non-Tortkara
anticommutative algebras with $(n-4)$-dimensional annihilator
| null | null | null | null |
math.RA
|
http://creativecommons.org/licenses/by/4.0/
|
In this paper, we give a complete classification of $n$-dimensional nilpotent
non-Tortkara anticommutative algebras with $(n-4)$-dimensional annihilator over
$\mathbb{C}$.
|
[{'version': 'v1', 'created': 'Mon, 7 Mar 2022 14:07:13 GMT'}
{'version': 'v2', 'created': 'Mon, 16 May 2022 14:14:34 GMT'}]
|
2022-05-17
|
[array(['Xu', 'Shun', ''], dtype=object)]
|
4,388 |
2206.08001
|
Ben Green
|
Ben Green
|
On S\'ark\"ozy's theorem for shifted primes
|
104 pages, submitted. Version 2 incorporates some minor corrections
and adds an explicit estimate for the Gamma function, allowing for the
possibility of an explicit computation of c using forthcoming zero-density
estimates of Thorner and Zaman
| null | null | null |
math.NT math.CO
|
http://creativecommons.org/licenses/by/4.0/
|
Suppose that $A \subset \{1,\dots, N\}$ has no two elements differing by
$p-1$, $p$ prime. Then $|A| \ll N^{1 - c}$.
|
[{'version': 'v1', 'created': 'Thu, 16 Jun 2022 08:50:32 GMT'}
{'version': 'v2', 'created': 'Fri, 22 Jul 2022 20:11:32 GMT'}]
|
2022-07-26
|
[array(['Green', 'Ben', ''], dtype=object)]
|
4,389 |
1707.04909
|
Taymaz Ghaneh
|
Taymaz Ghaneh
|
Solutions of Einstein Field Equation for an Extra-Dimensional
Anisotropic Metric with Two Scale Factors
|
9 pages
| null | null | null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The manuscript studies a 3+N+1-dimensional space in which the N extra
dimensions are dynamically compact. The 3 large dimensions, behaving as the
spacial part of the FRW metric, possess a different scale factor in comparison
with the N extra ones, making the whole space anisotropic. The possible effects
caused by the existence of a common time-like coordinate between the compact
dimensions and our 3-dimensional hypersurface are investigated. The higher
dimensional Friedmann-Like equations of the mentioned model are achieved. The
continuity equation is reached at the special case of 3+4+1-dimensional metric.
It is shown that not only the existence of the extra dimensions itself but also
the pressure difference between the 3-dimensional hypersurface and the compact
dimensions might get probed on the hypersurface as an additive source of
gravity with the same behavior as baryonic matter. Furthermore, the relation
between the coupling constant of the higher-dimensional universe and the
Newton's constant of gravitation is investigated to reach an estimated limit
for it. As another aim, the literature studies the role of dimensionality on
the behavior of the higher-dimensional Friedmann equations.
|
[{'version': 'v1', 'created': 'Sun, 16 Jul 2017 16:50:04 GMT'}]
|
2017-07-18
|
[array(['Ghaneh', 'Taymaz', ''], dtype=object)]
|
4,390 |
1012.1072
|
Andrei V. Zotov
|
Andrei V. Zotov
|
1+1 Gaudin Model
| null |
SIGMA 7: 067,2011
|
10.3842/SIGMA.2011.067
|
ITEP-TH-31/10
|
math-ph hep-th math.AG math.MP nlin.SI
|
http://creativecommons.org/licenses/by-nc-sa/3.0/
|
We study 1+1 field-generalizations of the rational and elliptic Gaudin
models. For ${\rm sl}(N)$ case we introduce equations of motion and L-A pair
with spectral parameter on the Riemann sphere and elliptic curve. In ${\rm
sl}(2)$ case we study the equations in detail and find the corresponding
Hamiltonian densities. The $n$-site model describes $n$ interacting
Landau-Lifshitz models of magnets. The interaction depends on position of the
sites (marked points on the curve). We also analyze the 2-site case in its own
right and describe its relation to the principal chiral model. We emphasize
that 1+1 version impose a restriction on a choice of flows on the level of the
corresponding 0+1 classical mechanics.
|
[{'version': 'v1', 'created': 'Mon, 6 Dec 2010 03:30:22 GMT'}
{'version': 'v2', 'created': 'Wed, 13 Jul 2011 05:02:08 GMT'}]
|
2011-09-23
|
[array(['Zotov', 'Andrei V.', ''], dtype=object)]
|
4,391 |
1705.01732
|
Nicholas Breznay
|
Nicholas P. Breznay, Mihir Tendulkar, Li Zhang, Sang-Chul Lee, Aharon
Kapitulnik
|
Superconductor to weak-insulator transitions in disordered Tantalum
Nitride films
|
7 figures
|
Phys. Rev. B 96, 134522 (2017)
|
10.1103/PhysRevB.96.134522
| null |
cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the two-dimensional superconductor-insulator transition (SIT) in
thin films of tantalum nitride. At zero magnetic field, films can be
disorder-tuned across the SIT by adjusting thickness and film stoichiometry;
insulating films exhibit classical hopping transport. Superconducting films
exhibit a magnetic field-tuned SIT, whose insulating ground state at high field
appears to be a quantum-corrected metal. Scaling behavior at the field-tuned
SIT shows classical percolation critical exponents $z \nu \approx$ 1.3, with a
corresponding critical field $H_c \ll H_{c2}$. The Hall effect shows a crossing
point near $H_c$, but with a non-universal critical value $\rho_{xy}^c$
comparable to the normal state Hall resistivity. We propose that high-carrier
density metals will always exhibit this pattern of behavior at the boundary
between superconducting and (trivially) insulating ground states.
|
[{'version': 'v1', 'created': 'Thu, 4 May 2017 08:20:07 GMT'}
{'version': 'v2', 'created': 'Fri, 5 May 2017 06:41:22 GMT'}]
|
2017-11-08
|
[array(['Breznay', 'Nicholas P.', ''], dtype=object)
array(['Tendulkar', 'Mihir', ''], dtype=object)
array(['Zhang', 'Li', ''], dtype=object)
array(['Lee', 'Sang-Chul', ''], dtype=object)
array(['Kapitulnik', 'Aharon', ''], dtype=object)]
|
4,392 |
math/0308272
|
Jooyoun Hong
|
Jooyoun Hong
|
Rees Algebras of Conormal Modules
|
This paper is based on the Ph.D. dissertation of the author
| null | null | null |
math.AC
| null |
We deal with classes of prime ideals whose associated graded ring is
isomorphic to the Rees algebra of the conormal module in order to describe the
divisor class group of the Rees algebra and to examine the normality of the
conormal module.
|
[{'version': 'v1', 'created': 'Thu, 28 Aug 2003 04:22:41 GMT'}]
|
2007-05-23
|
[array(['Hong', 'Jooyoun', ''], dtype=object)]
|
4,393 |
0905.2630
|
Tian De Cao
|
Tian De Cao, Tie Bang Wang
|
Competition between singlet and triplet superconductivity
|
7pages
|
J Supercond Nov Magn (2010) 23: 361?C364
|
10.1007/s10948-009-0584-4
| null |
physics.gen-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The competition between singlet and triplet superconductivity is examined in
consideration of correlations on an extended Hubbard model. It is shown that
the triplet superconductivity may not be included in the common Hubbard model
since the strong correlation favors the singlet superconductivity, and thus the
triplet superconductivity should be induced by the electron-phonon interaction
and the ferromagnetic exchange interaction. We also present a superconducting
qualification with which magnetism is unbeneficial to superconductivity.
|
[{'version': 'v1', 'created': 'Fri, 15 May 2009 22:11:39 GMT'}
{'version': 'v2', 'created': 'Fri, 31 Jul 2009 09:05:21 GMT'}
{'version': 'v3', 'created': 'Sun, 4 Oct 2009 02:13:18 GMT'}]
|
2010-03-02
|
[array(['De Cao', 'Tian', ''], dtype=object)
array(['Wang', 'Tie Bang', ''], dtype=object)]
|
4,394 |
2010.07909
|
Anton Shafarevich
|
Anton Shafarevich
|
Additive actions on toric projective hypersurfaces
|
13 pages
| null | null | null |
math.AG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $\mathbb{K}$ be an algebraically closed field of characteristic zero and
$\mathbb{G}_a$ be the additive group of $\mathbb{K}$. We say that an
irreducible algebraic variety $X$ of dimension $n$ over the field $\mathbb{K}$
admits an additive action if there is a regular action of the group
$\mathbb{G}_a^n = \mathbb{G}_a \times \ldots \times \mathbb{G}_a$ ($n$ times)
on $X$ with an open orbit. In this paper we find all projective toric
hypersurfaces admitting additive action.
|
[{'version': 'v1', 'created': 'Thu, 15 Oct 2020 17:41:25 GMT'}]
|
2020-10-16
|
[array(['Shafarevich', 'Anton', ''], dtype=object)]
|
4,395 |
0904.4260
|
Miron Amusia
|
M. Ya. Amusia (1 and 2) ((1) Hebrew University, Jerusalem, Israel,
(2)Ioffe Physico-Technical Institute, St. Petersburg, Russia)
|
Big consequences of small changes (Non-locality and non-linearity of
Hartree-Fock equations)
|
16 pages, 3 figures
| null |
10.1002/ctpp.200910051
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It is demonstrated that non-locality and non-linearity of Hartree-Fock
equations dramatically affect the properties of their solutions that
essentially differ from solutions of Schr?dinger equation with a local
potential. Namely, it acquires extra zeroes, has different coordinate
asymptotic, violates so-called gauge-invariance, has different scattering
phases at zero energy, has in some cases several solutions with the same set of
quantum numbers, usually equivalent expressions of current and Green's
functions became non-equivalent. These features result in a number of
consequences for probabilities of some physical processes, leading e. g. to
extra width of atomic Giant resonances and enhance considerably the ionization
probability of inner atomic electrons by a strong field.
|
[{'version': 'v1', 'created': 'Mon, 27 Apr 2009 20:18:34 GMT'}]
|
2015-10-28
|
[array(['Amusia', 'M. Ya.', '', '1 and 2'], dtype=object)]
|
4,396 |
2204.06854
|
Zhun Lu
|
Xiaoyan Luan and Zhun Lu
|
Sivers function of sea quarks in the light-cone model
|
9 pages, figures
| null |
10.1016/j.physletb.2022.137299
| null |
hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
We calculate the Sivers function of $\bar{u}$ and $\bar{d}$ quarks using the
overlap representation within the light-cone formalism. The light-cone wave
functions of the proton is obtained in terms of the $|\bar{q} q B\rangle$ Fock
states motivated by the meson-baryon fluctuation model. We consider the
final-state interaction at the level of one gluon exchange. In a simplified
scenario, the Sivers function of $\bar{u}$ and $\bar{d}$ can be expressed as
the convolution of the Sivers function of the pion inside the proton and the
unpolarized distribution of $\bar{q}$ inside the pion. The model parameters are
fixed by fitting the unpolarized sea quark distributions to the known
parameterizations. We present the numerical results for $f_1^{\perp
\bar{u}/p}(x,\boldsymbol{k}_T^2)$ and $f_1^{\perp
\bar{d}/p}(x,\boldsymbol{k}_T^2)$. The first transverse moment of the sea quark
Sivers functions in our model are find to be negative and the magnitude is
about 0.004 at most.
|
[{'version': 'v1', 'created': 'Thu, 14 Apr 2022 10:06:45 GMT'}]
|
2022-07-20
|
[array(['Luan', 'Xiaoyan', ''], dtype=object)
array(['Lu', 'Zhun', ''], dtype=object)]
|
4,397 |
2306.05645
|
Tom Allison
|
Myles C. Silfies, Arshad Mehmood, Grzegorz Kowzan, Edward G.
Hohenstein, Benjamin G. Levine, Thomas K. Allison
|
Ultrafast internal conversion and photochromism in gas-phase
salicylideneaniline
| null | null | null | null |
physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Salicylidenaniline (SA) is an archetypal system for excited-state
intramolecular proton transfer (ESIPT) in non-planar systems. Multiple channels
for relaxation involving both the keto and enol forms have been proposed after
excitation to S$_1$ with near-UV light. Here we present transient absorption
measurements of hot gas-phase SA, jet-cooled SA, and SA in Ar clusters using
cavity-enhanced transient absorption spectroscopy (CE-TAS). Assignment of the
spectra is aided by simulated TAS spectra, computed by applying time-dependent
complete active space configuration interaction (TD-CASCI) to structures drawn
from nonadiabatic molecular dynamics simulations. We find prompt ESIPT in all
conditions followed by the rapid parallel generation of the trans-keto
metastable photochrome state and fluorescent keto state in parallel. Increasing
the internal energy increases the photochrome yield and decreases the
fluorescent yield and fluorescent state lifetime observed in TAS. In Ar
clusters, internal conversion of SA is severely hindered but the photochrome
yield is unchanged. Taken together, these results are consistent with the
photochrome being produced via the vibrationally excited keto population after
ESIPT.
|
[{'version': 'v1', 'created': 'Fri, 9 Jun 2023 03:17:50 GMT'}]
|
2023-06-12
|
[array(['Silfies', 'Myles C.', ''], dtype=object)
array(['Mehmood', 'Arshad', ''], dtype=object)
array(['Kowzan', 'Grzegorz', ''], dtype=object)
array(['Hohenstein', 'Edward G.', ''], dtype=object)
array(['Levine', 'Benjamin G.', ''], dtype=object)
array(['Allison', 'Thomas K.', ''], dtype=object)]
|
4,398 |
1505.05718
|
Stephan Dominique Andres
|
Stephan Dominique Andres and Winfried Hochst\"attler
|
The game colouring number of powers of forests
| null |
Discrete Mathematics & Theoretical Computer Science, Vol. 18 no.
1, Graph Theory (November 24, 2015) dmtcs:648
|
10.46298/dmtcs.648
| null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove that the game colouring number of the $m$-th power of a forest of
maximum degree $\Delta\ge3$ is bounded from above by
\[\frac{(\Delta-1)^m-1}{\Delta-2}+2^m+1,\] which improves the best known bound
by an asymptotic factor of 2.
|
[{'version': 'v1', 'created': 'Thu, 21 May 2015 13:09:47 GMT'}
{'version': 'v2', 'created': 'Wed, 11 Nov 2015 19:08:10 GMT'}
{'version': 'v3', 'created': 'Mon, 23 Nov 2015 18:49:39 GMT'}]
|
2023-06-22
|
[array(['Andres', 'Stephan Dominique', ''], dtype=object)
array(['Hochstättler', 'Winfried', ''], dtype=object)]
|
4,399 |
2011.02599
|
Chi-Lun Lee
|
Hsin Chang, Chi-Lun Lee, Pik-Yin Lai, Yung-Fu Chen
|
Autonomous Brownian gyrators: a study on gyrating characteristics
|
9 pages, 3 figures
|
Phys. Rev. E 103, 022128 (2021)
|
10.1103/PhysRevE.103.022128
| null |
cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the nonequilibrium steady-state (NESS) dynamics of two-dimensional
Brownian gyrators under harmonic and nonharmonic potentials via computer
simulations and analyses based on the Fokker-Planck equation, while our
nonharmonic cases feature a double-well potential and an isotropic quartic
potential. In particular, we report two simple methods that can help understand
gyrating patterns. For harmonic potentials, we use the Fokker-Planck equation
to survey the NESS dynamical characteristics, i.e., the NESS currents gyrate
along the equiprobability contours and the stationary point of flow coincides
with the potential minimum. As a contrast, the NESS results in our nonharmonic
potentials show that these properties are largely absent, as the gyrating
patterns are much distinct from those of corresponding probability
distributions. Furthermore, we observe a critical case of the double-well
potential, where the harmonic contribution to the gyrating pattern becomes
absent, and the NESS currents do not circulate about the equiprobability
contours nearby the potential minima even at low temperatures.
|
[{'version': 'v1', 'created': 'Thu, 5 Nov 2020 00:54:56 GMT'}
{'version': 'v2', 'created': 'Sat, 16 Jan 2021 15:38:36 GMT'}
{'version': 'v3', 'created': 'Thu, 18 Feb 2021 12:21:20 GMT'}]
|
2021-02-24
|
[array(['Chang', 'Hsin', ''], dtype=object)
array(['Lee', 'Chi-Lun', ''], dtype=object)
array(['Lai', 'Pik-Yin', ''], dtype=object)
array(['Chen', 'Yung-Fu', ''], dtype=object)]
|
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