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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1,600 |
1703.10782
|
Kastytis Zubovas
|
Kastytis Zubovas, Martin A. Bourne
|
Do AGN outflows quench or enhance star formation?
|
13 pages, 8 figures. Accepted for publication in MNRAS (v2: minor
updates to references and acknowledgments)
| null |
10.1093/mnras/stx787
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
AGN outflows can remove large quantities of gas from their host galaxy
spheroids, potentially shutting off star formation. On the other hand, they can
compress this gas, potentially enhancing or triggering star formation, at least
for short periods. We present a set of idealised simulations of AGN outflows
affecting turbulent gas spheres, and investigate the effect of the outflow and
the AGN radiation field upon gas fragmentation. We show that AGN outflows of
sufficient luminosity shut off fragmentation while the nucleus is active, but
gas compression results in a burst of fragmentation after the AGN switches off.
Self-shielding of gas against the AGN radiation field allows some fragmentation
to occur during outbursts, but too much shielding results in a lower overall
fragmentation rate. For our idealised simulation setup, there is a critical AGN
luminosity which results in the highest fragmentation rate, with outflows being
too efficient at removing gas when $L > L_{\rm crit}$ and not efficient enough
to compress the gas to high densities otherwise. These results, although
preliminary, suggest that the interaction between AGN and star formation in
their host galaxies is particularly complex and requires careful study in order
to interpret observations correctly.
|
[{'version': 'v1', 'created': 'Fri, 31 Mar 2017 07:56:07 GMT'}
{'version': 'v2', 'created': 'Wed, 26 Apr 2017 08:52:52 GMT'}]
|
2017-04-27
|
[array(['Zubovas', 'Kastytis', ''], dtype=object)
array(['Bourne', 'Martin A.', ''], dtype=object)]
|
1,601 |
0711.2254
|
Felix Fehr
|
Felix Fehr (for the ANTARES Collaboration)
|
Calibration systems and methods for the ANTARES neutrino telescope
|
4 pages, 3 figures, to appear in the proceedings of 30th
International Cosmic Ray Conference (ICRC 2007), Merida, Yucatan, Mexico,
3-11 Jul 2007
| null | null |
FAU-ECAP-07-01
|
astro-ph
| null |
The ANTARES neutrino telescope is currently being constructed in the
Mediterranean Sea. The complete detector will consist of 12 strings,
supplemented by an additional instrumentation line. Nine strings are at present
deployed of which five are already connected to the shore and operating. Each
string is equipped with 75 Optical Modules (OMs) housing the photomultipliers
to detect the Cherenkov light induced by the charged particles produced in
neutrino reactions. An accurate measurement of the Cherenkov photon arrival
times as well as the positions and orientations of the OMs is required for a
precise reconstruction of the direction of the detected neutrinos. For this
purpose the ANTARES detector is provided with several system s to facilitate
the calibration of the detector. The time calibration is performed using light
pulses emitted from LED and laser devices. The positioning is done via acoustic
triangulation using hydrophones. Additionally, local tilt angles and the
orientations of the modules are measured with a set of tiltmeters and
compasses. In this paper, it is demonstrated that the ANTARES time and
alignment calibration systems operate successfully in situ. In particular, it
is shown that the ANTARES read-out electronics is capable of reaching a
sub-nanosecond time resolution.
|
[{'version': 'v1', 'created': 'Wed, 14 Nov 2007 17:47:28 GMT'}]
|
2019-08-13
|
[array(['Fehr', 'Felix', '', 'for the ANTARES Collaboration'], dtype=object)]
|
1,602 |
1710.04451
|
Yetkin Tua\c{c}
|
Yetkin Tua\c{c}, Ye\c{s}im G\"uney Birdal \c{S}eno\u{g}lu and Olcay
Arslan
|
Robust Parameter Estimation of Regression Model with AR(p) Error Terms
| null | null |
10.1080/03610918.2017.1343839
| null |
stat.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we consider a linear regression model with AR(p) error terms
with the assumption that the error terms have a t distribution as a heavy
tailed alternative to the normal distribution. We obtain the estimators for the
model parameters by using the conditional maximum likelihood (CML) method. We
conduct an iteratively reweighting algorithm (IRA) to find the estimates for
the parameters of interest. We provide a simulation study and three real data
examples to illustrate the performance of the proposed robust estimators based
on t distribution.
|
[{'version': 'v1', 'created': 'Thu, 12 Oct 2017 11:14:10 GMT'}]
|
2017-10-13
|
[array(['Tuaç', 'Yetkin', ''], dtype=object)
array(['Şenoğlu', 'Yeşim Güney Birdal', ''], dtype=object)
array(['Arslan', 'Olcay', ''], dtype=object)]
|
1,603 |
1706.03434
|
Haroldo Ribeiro
|
Angel A. Tateishi, Haroldo V. Ribeiro, Ervin K. Lenzi
|
The role of fractional time-derivative operators on anomalous diffusion
| null |
Front. Phys. 5, 52 (2017)
|
10.3389/fphy.2017.00052
| null |
cond-mat.stat-mech math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The generalized diffusion equations with fractional order derivatives have
shown be quite efficient to describe the diffusion in complex systems, with the
advantage of producing exact expressions for the underlying diffusive
properties. Recently, researchers have proposed different fractional-time
operators (namely: the Caputo-Fabrizio and Atangana-Baleanu) which, differently
from the well-known Riemann-Liouville operator, are defined by non-singular
memory kernels. Here we proposed to use these new operators to generalize the
usual diffusion equation. By analyzing the corresponding fractional diffusion
equations within the continuous time random walk framework, we obtained waiting
time distributions characterized by exponential, stretched exponential, and
power-law functions, as well as a crossover between two behaviors. For the mean
square displacement, we found crossovers between usual and confined diffusion,
and between usual and sub-diffusion. We obtained the exact expressions for the
probability distributions, where non-Gaussian and stationary distributions
emerged. This former feature is remarkable because the fractional diffusion
equation is solved without external forces and subjected to the free diffusion
boundary conditions. We have further shown that these new fractional diffusion
equations are related to diffusive processes with stochastic resetting, and to
fractional diffusion equations with derivatives of distributed order. Thus, our
results show that these new operators are a simple and efficient way for
incorporating different structural aspects into the system, opening new
possibilities for modeling and investigating anomalous diffusive processes.
|
[{'version': 'v1', 'created': 'Mon, 12 Jun 2017 01:44:32 GMT'}
{'version': 'v2', 'created': 'Tue, 8 Aug 2017 12:24:13 GMT'}]
|
2017-11-21
|
[array(['Tateishi', 'Angel A.', ''], dtype=object)
array(['Ribeiro', 'Haroldo V.', ''], dtype=object)
array(['Lenzi', 'Ervin K.', ''], dtype=object)]
|
1,604 |
2003.10397
|
Charles Frye
|
Charles G. Frye, James Simon, Neha S. Wadia, Andrew Ligeralde, Michael
R. DeWeese, Kristofer E. Bouchard
|
Critical Point-Finding Methods Reveal Gradient-Flat Regions of Deep
Network Losses
|
18 pages, 5 figures
| null | null | null |
cs.LG cs.NE stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Despite the fact that the loss functions of deep neural networks are highly
non-convex, gradient-based optimization algorithms converge to approximately
the same performance from many random initial points. One thread of work has
focused on explaining this phenomenon by characterizing the local curvature
near critical points of the loss function, where the gradients are near zero,
and demonstrating that neural network losses enjoy a no-bad-local-minima
property and an abundance of saddle points. We report here that the methods
used to find these putative critical points suffer from a bad local minima
problem of their own: they often converge to or pass through regions where the
gradient norm has a stationary point. We call these gradient-flat regions,
since they arise when the gradient is approximately in the kernel of the
Hessian, such that the loss is locally approximately linear, or flat, in the
direction of the gradient. We describe how the presence of these regions
necessitates care in both interpreting past results that claimed to find
critical points of neural network losses and in designing second-order methods
for optimizing neural networks.
|
[{'version': 'v1', 'created': 'Mon, 23 Mar 2020 17:16:19 GMT'}]
|
2020-03-24
|
[array(['Frye', 'Charles G.', ''], dtype=object)
array(['Simon', 'James', ''], dtype=object)
array(['Wadia', 'Neha S.', ''], dtype=object)
array(['Ligeralde', 'Andrew', ''], dtype=object)
array(['DeWeese', 'Michael R.', ''], dtype=object)
array(['Bouchard', 'Kristofer E.', ''], dtype=object)]
|
1,605 |
hep-th/9510177
|
Ctirad Klimcik
|
H. Grosse, C. Klimcik, P. Presnajder
|
Simple field theoretical models on noncommutative manifolds
|
15 pages, TeX (based on lectures given by H. Grosse at Workshops in
Clausthal (Germany) and Razlog (Bulgaria) in August 1995)
| null | null |
CERN-TH/95-274, IHES/P/95/91, UWThPh-33-1995
|
hep-th
| null |
We review recent progress in formulating two-dimensional models over
noncommutative manifolds where the space-time coordinates enter in the
formalism as non-commuting matrices. We describe the Fuzzy sphere and a way to
approximate topological nontrivial configurations using matrix models. We
obtain an ultraviolet cut off procedure, which respects the symmetries of the
model. The treatment of spinors results from a supersymmetric formulation; our
cut off procedure preserves even the supersymmetry.
|
[{'version': 'v1', 'created': 'Tue, 24 Oct 1995 14:49:30 GMT'}]
|
2007-05-23
|
[array(['Grosse', 'H.', ''], dtype=object)
array(['Klimcik', 'C.', ''], dtype=object)
array(['Presnajder', 'P.', ''], dtype=object)]
|
1,606 |
cond-mat/0503535
|
Jose D'Incao
|
J. P. D'Incao and B. D. Esry
|
Manifestations of the Efimov Effect for Three Identical Bosons
|
10 pages, 10 figures
| null |
10.1103/PhysRevA.72.032710
| null |
cond-mat.other
| null |
In this paper we present results from numerical calculations for three
identical boson systems for both very large and infinite two-body s-wave
scattering length $a$. We have considered scattering lengths up to $2\times
10^5$ a.u. and solved the hyperangular part of the Schr\"odinger equation for
distances up to $10^6$ a.u.. Form these, we obtained the three-body effective
potentials, hyperspherical channel functions and the asymptotic behavior of the
nonadiabatic couplings in order to to characterize the main aspects of the
Efimov states. These results allow us to test and quantify the assumptions
related to the Efimov effect.
|
[{'version': 'v1', 'created': 'Tue, 22 Mar 2005 02:20:14 GMT'}]
|
2009-11-11
|
[array(["D'Incao", 'J. P.', ''], dtype=object)
array(['Esry', 'B. D.', ''], dtype=object)]
|
1,607 |
hep-ph/0212148
|
Alberto Accardi
|
Alberto Accardi
|
Cronin effect in proton-nucleus collisions: a survey of theoretical
models
|
Contribution to the CERN Yellow report on Hard Probes in Heavy Ion
Collisions at the LHC. 8 pages, 1 figure, uses cernrep.cls
| null | null | null |
hep-ph hep-ex nucl-ex nucl-th
| null |
I compare the available theoretical models that describe the Cronin effect on
hadron and minijet production in proton-nucleus collisions, pointing out
similarities and differences among them. The effect may be summarized by the
value of two variables. Their values computed in the different models are
compared in the energy range 27.4 GeV - 5500 GeV. Finally, I propose to use the
pseudorapidity systematics as a further handle to distinguish among the models.
|
[{'version': 'v1', 'created': 'Wed, 11 Dec 2002 16:21:00 GMT'}
{'version': 'v2', 'created': 'Fri, 21 Mar 2003 23:44:01 GMT'}]
|
2007-05-23
|
[array(['Accardi', 'Alberto', ''], dtype=object)]
|
1,608 |
1403.3066
|
Frederick Matsen IV
|
Connor O. McCoy, Trevor Bedford, Vladimir N. Minin, Philip Bradley,
Harlan Robins and Frederick A. Matsen IV
|
Quantifying evolutionary constraints on B cell affinity maturation
|
Previously entitled "Substitution and site-specific selection driving
B cell affinity maturation is consistent across individuals"
| null |
10.1098/rstb.2014-0244
| null |
q-bio.PE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The antibody repertoire of each individual is continuously updated by the
evolutionary process of B cell receptor mutation and selection. It has recently
become possible to gain detailed information concerning this process through
high-throughput sequencing. Here, we develop modern statistical molecular
evolution methods for the analysis of B cell sequence data, and then apply them
to a very deep short-read data set of B cell receptors. We find that the
substitution process is conserved across individuals but varies significantly
across gene segments. We investigate selection on B cell receptors using a
novel method that side-steps the difficulties encountered by previous work in
differentiating between selection and motif-driven mutation; this is done
through stochastic mapping and empirical Bayes estimators that compare the
evolution of in-frame and out-of-frame rearrangements. We use this new method
to derive a per-residue map of selection, which provides a more nuanced view of
the constraints on framework and variable regions.
|
[{'version': 'v1', 'created': 'Wed, 12 Mar 2014 19:01:41 GMT'}
{'version': 'v2', 'created': 'Wed, 9 Jul 2014 23:41:02 GMT'}
{'version': 'v3', 'created': 'Mon, 12 Jan 2015 22:45:43 GMT'}
{'version': 'v4', 'created': 'Fri, 8 May 2015 13:56:59 GMT'}]
|
2015-05-11
|
[array(['McCoy', 'Connor O.', ''], dtype=object)
array(['Bedford', 'Trevor', ''], dtype=object)
array(['Minin', 'Vladimir N.', ''], dtype=object)
array(['Bradley', 'Philip', ''], dtype=object)
array(['Robins', 'Harlan', ''], dtype=object)
array(['Matsen', 'Frederick A.', 'IV'], dtype=object)]
|
1,609 |
1707.06490
|
Charles Livingston
|
Charles Livingston
|
Concordances from connected sums of torus knots to L-space knots
|
typographical corrections
|
New York J. Math. 24 (2018), 233-239
| null | null |
math.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
If a knot is a nontrivial connected sum of positive torus knots, then it is
not concordant to an L-space knot.
|
[{'version': 'v1', 'created': 'Thu, 20 Jul 2017 13:06:47 GMT'}
{'version': 'v2', 'created': 'Sat, 5 Aug 2017 11:58:38 GMT'}]
|
2018-06-13
|
[array(['Livingston', 'Charles', ''], dtype=object)]
|
1,610 |
1908.01976
|
Jing Zhang
|
Jing Zhang, Jin Xu, Kai Jia, Yimin Yin and Zhengming Wang
|
Optimal Sliced Latin Hypercube Designs with Slices of Arbitrary Run
Sizes
| null | null | null | null |
math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Sliced Latin hypercube designs (SLHDs) are widely used in computer
experiments with both quantitative and qualitative factors and in batches.
Optimal SLHDs achieve better space-filling property on the whole experimental
region. However, most existing methods for constructing optimal SLHDs have
restriction on the run sizes. In this paper, we propose a new method for
constructing SLHDs with arbitrary run sizes, and a new combined space-filling
measurement describing the space-filling property for both the whole design and
its slices. Furthermore, we develop general algorithms to search the optimal
SLHD with arbitrary run sizes under the proposed measurement. Examples are
presented to illustrate that effectiveness of the proposed methods.
|
[{'version': 'v1', 'created': 'Tue, 6 Aug 2019 06:25:59 GMT'}]
|
2019-08-07
|
[array(['Zhang', 'Jing', ''], dtype=object)
array(['Xu', 'Jin', ''], dtype=object)
array(['Jia', 'Kai', ''], dtype=object)
array(['Yin', 'Yimin', ''], dtype=object)
array(['Wang', 'Zhengming', ''], dtype=object)]
|
1,611 |
hep-ph/0606099
|
Pedro Castelo Ferreira
|
J. Tito Mendonca, J. Dias de Deus, P. Castelo Ferreira
|
Higher Harmonics in Non-Linear Vacuum from QED Effects Without Low Mass
Intermediate Particles
|
4 pages, 1 figure; includes Erratum: The PVLAS signal cannot be
explained by this mechanism
|
Phys.Rev.Lett.97:100403,2006; Erratum-ibid.97:269901,2006
|
10.1103/PhysRevLett.97.100403
| null |
hep-ph
| null |
We show that in the presence of a slowly rotating strong transverse magnetic
field there is an infinite spectrum of harmonic wave functions $A_n$ due to the
first order QED correction (in $\alpha^2$) given by the Euler-Heisenberg
Lagrangian. The frequency shifts are integer multiples $\pm \omega_0 n$ of the
magnetic field angular frequency rotation $\omega_0=2\pi\nu_m$ and the several
modes $n$ are coupled to the nearest harmonics $n\pm 1$. This is a new effect
due to QED vacuum fluctuations, not exploit before, that can explain, both
qualitatively and quantatively, the recent experimental results of the PVLAS
collaboration without the need of a low mass intermediate particle, hence
dismiss the recent claim of the discovery of the axion. [Erratum: The PVLAS
signal cannot be explained by this mechanism.]
|
[{'version': 'v1', 'created': 'Thu, 8 Jun 2006 17:11:42 GMT'}
{'version': 'v2', 'created': 'Tue, 4 Jul 2006 15:34:27 GMT'}
{'version': 'v3', 'created': 'Tue, 3 Jul 2007 13:14:08 GMT'}]
|
2008-11-26
|
[array(['Mendonca', 'J. Tito', ''], dtype=object)
array(['de Deus', 'J. Dias', ''], dtype=object)
array(['Ferreira', 'P. Castelo', ''], dtype=object)]
|
1,612 |
1612.04590
|
Stefan Wagner
|
Stefan Wagner
|
A literature survey of the quality economics of defect-detection
techniques
|
10 pages, 3 figures
|
Proceedings of the 2006 ACM/IEEE International Symposium on
Empirical Software Engineering (ISESE '06). Pages 194-203. ACM, 2006
|
10.1145/1159733.1159763
| null |
cs.SE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Over the last decades, a considerable amount of empirical knowledge about the
efficiency of defect-detection techniques has been accumulated. Also a few
surveys have summarised those studies with different focuses, usually for a
specific type of technique. This work reviews the results of empirical studies
and associates them with a model of software quality economics. This allows a
better comparison of the different techniques and supports the application of
the model in practice as several parameters can be approximated with typical
average values. The main contributions are the provision of average values of
several interesting quantities w.r.t. defect detection and the identification
of areas that need further research because of the limited knowledge available.
|
[{'version': 'v1', 'created': 'Wed, 14 Dec 2016 11:49:21 GMT'}]
|
2016-12-15
|
[array(['Wagner', 'Stefan', ''], dtype=object)]
|
1,613 |
hep-ph/0404181
|
Ales Psaker
|
Ales Psaker
|
Inclusive Photoproduction of Lepton Pairs in the Parton Model
|
5 pages, 2 figures, Based on poster presentation given at V Latin
American Symposium on Nuclear Physics
|
Braz.J.Phys.34:944-947,2004
|
10.1590/S0103-97332004000500064
|
JLAB-THY-04-220
|
hep-ph
| null |
In the framework of the QCD parton model, we study unpolarized scattering of
high energy real photons from a proton target into lepton pairs and a system of
hadrons. For a given parametrization of parton distributions in the proton, we
calculate the cross section of this process and show the cancellation of the
interference terms.
|
[{'version': 'v1', 'created': 'Wed, 21 Apr 2004 17:53:07 GMT'}]
|
2017-08-23
|
[array(['Psaker', 'Ales', ''], dtype=object)]
|
1,614 |
2203.08437
|
Ryosuke Sugiura
|
Ryosuke Sugiura, Yutaka Kamamoto, Takehiro Moriya
|
General form of almost instantaneous fixed-to-variable-length codes
|
submitted to IEEE Transactions on Information Theory. arXiv admin
note: text overlap with arXiv:1607.07247 by other authors
| null | null | null |
cs.IT math.IT
|
http://creativecommons.org/licenses/by/4.0/
|
A general class of the almost instantaneous fixed-to-variable-length (AIFV)
codes is proposed, which contains every possible binary code we can make when
allowing finite bits of decoding delay. The contribution of the paper lies in
the following. (i) Introducing $N$-bit-delay AIFV codes, constructed by
multiple code trees with higher flexibility than the conventional AIFV codes.
(ii) Proving that the proposed codes can represent any uniquely-encodable and
uniquely-decodable variable-to-variable length codes. (iii) Showing how to
express codes as multiple code trees with minimum decoding delay. (iv)
Formulating the constraints of decodability as the comparison of intervals in
the real number line. The theoretical results in this paper are expected to be
useful for further study on AIFV codes.
|
[{'version': 'v1', 'created': 'Wed, 16 Mar 2022 07:23:39 GMT'}
{'version': 'v2', 'created': 'Wed, 21 Sep 2022 12:23:12 GMT'}
{'version': 'v3', 'created': 'Mon, 19 Jun 2023 00:05:56 GMT'}]
|
2023-06-21
|
[array(['Sugiura', 'Ryosuke', ''], dtype=object)
array(['Kamamoto', 'Yutaka', ''], dtype=object)
array(['Moriya', 'Takehiro', ''], dtype=object)]
|
1,615 |
1105.2568
|
Jaume Gomis
|
Jaume Gomis, Takuya Okuda, Vasily Pestun
|
Exact Results for 't Hooft Loops in Gauge Theories on S^4
|
86 pages, LaTeX
| null |
10.1007/JHEP05(2012)141
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The path integral of a general N=2 supersymmetric gauge theory on S^4 is
exactly evaluated in the presence of a supersymmetric 't Hooft loop operator.
The result we find - obtained using localization techniques - captures all
perturbative quantum corrections as well as non-perturbative effects due to
instantons and monopoles, which are supported at the north pole, south pole and
equator of S^4. As a by-product, our gauge theory calculations successfully
confirm the predictions made for 't Hooft loops obtained from the calculation
of topological defect correlators in Liouville/Toda conformal field theory.
|
[{'version': 'v1', 'created': 'Thu, 12 May 2011 20:02:56 GMT'}]
|
2015-05-28
|
[array(['Gomis', 'Jaume', ''], dtype=object)
array(['Okuda', 'Takuya', ''], dtype=object)
array(['Pestun', 'Vasily', ''], dtype=object)]
|
1,616 |
1007.4458
|
Vera Roshchina
|
Boris Mordukhovich, Javier Pe\~na, Vera Roshchina
|
Applying Metric Regularity to Compute a Condition Measure of a Smoothing
Algorithm for Matrix Games
| null | null | null | null |
math.OC math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We develop an approach of variational analysis and generalized
differentiation to conditioning issues for two-person zero-sum matrix games.
Our major results establish precise relationships between a certain condition
measure of the smoothing first-order algorithm proposed by Gilpin et al.
[Proceedings of the 23rd AAAI Conference (2008) pp. 75-82] and the exact bound
of metric regularity for an associated set-valued mapping. In this way we
compute the aforementioned condition measure in terms of the initial matrix
game data.
|
[{'version': 'v1', 'created': 'Mon, 26 Jul 2010 13:45:28 GMT'}
{'version': 'v2', 'created': 'Wed, 17 Nov 2010 22:47:32 GMT'}]
|
2010-11-19
|
[array(['Mordukhovich', 'Boris', ''], dtype=object)
array(['Peña', 'Javier', ''], dtype=object)
array(['Roshchina', 'Vera', ''], dtype=object)]
|
1,617 |
2110.03124
|
Yihao Wang
|
Yihao Wang
|
Improving Adversarial Robustness for Free with Snapshot Ensemble
| null | null | null | null |
cs.LG cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Adversarial training, as one of the few certified defenses against
adversarial attacks, can be quite complicated and time-consuming, while the
results might not be robust enough. To address the issue of lack of robustness,
ensemble methods were proposed, aiming to get the final output by weighting the
selected results from repeatedly trained processes. It is proved to be very
useful in achieving robust and accurate results, but the computational and
memory costs are even higher. Snapshot ensemble, a new ensemble method that
combines several local minima in a single training process to make the final
prediction, was proposed recently, which reduces the time spent on training
multiple networks and the memory to store the results. Based on the snapshot
ensemble, we present a new method that is easier to implement: unlike original
snapshot ensemble that seeks for local minima, our snapshot ensemble focuses on
the last few iterations of a training and stores the sets of parameters from
them. Our algorithm is much simpler but the results are no less accurate than
the original ones: based on different hyperparameters and datasets, our
snapshot ensemble has shown a 5% to 30% increase in accuracy when compared to
the traditional adversarial training.
|
[{'version': 'v1', 'created': 'Thu, 7 Oct 2021 00:41:45 GMT'}]
|
2021-10-08
|
[array(['Wang', 'Yihao', ''], dtype=object)]
|
1,618 |
1712.05178
|
Pietro Lombardi
|
Sofia Pazzagli and Pietro Lombardi and Daniele Martella and Maja
Colautti and Bruno Tiribilli and Francesco Saverio Cataliotti and Costanza
Toninelli
|
Photostable single-photon emission from self-assembled nanocrystals of
polycyclic aromatic hydrocarbons
| null | null | null | null |
physics.app-ph cond-mat.mes-hall cond-mat.mtrl-sci physics.optics quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Quantum technologies could largely benefit from the control of quantum
emitters in sub-micrometric size crystals. These are naturally prone to the
integration in hybrid devices, including heterostructures and complex photonic
devices. Currently available quantum emitters sculpted in nanocrystals suffer
from spectral instability, preventing their use as single photon sources e.g.,
for most quantum optics operations. In this work we report on unprecedented
performances of single-photon emission from organic nanocrystals (average size
of hundreds \SI{}{\nano\meter}), made of anthracene (Ac) and doped with
dibenzoterrylene (DBT) molecules. The source has hours-long photostability with
respect to frequency and intensity, both at room and at cryogenic temperature.
When cooled down to \SI{3}{K}, the 00-zero phonon line shows linewidth values
(\SI{50}{MHz}) close to the lifetime-limit. Such optical properties in a
nanocrystalline environment make the proposed organic nanocrystals a unique
single-photon source for integrated photonic quantum technologies.
|
[{'version': 'v1', 'created': 'Thu, 14 Dec 2017 11:26:50 GMT'}
{'version': 'v2', 'created': 'Fri, 15 Dec 2017 11:30:26 GMT'}]
|
2017-12-18
|
[array(['Pazzagli', 'Sofia', ''], dtype=object)
array(['Lombardi', 'Pietro', ''], dtype=object)
array(['Martella', 'Daniele', ''], dtype=object)
array(['Colautti', 'Maja', ''], dtype=object)
array(['Tiribilli', 'Bruno', ''], dtype=object)
array(['Cataliotti', 'Francesco Saverio', ''], dtype=object)
array(['Toninelli', 'Costanza', ''], dtype=object)]
|
1,619 |
gr-qc/0104039
|
Bin Zhou
|
Bin Zhou
|
Global Structure of Certain Static Spacetimes (I)
|
Plain LaTeX, 10 pages, no figures
| null | null | null |
gr-qc
| null |
In this paper, static spacetimes with a topological structure of R^2 \times N
is studied, where N is an arbitrary manifold. Well known Schwarzschild
spacetime and Reissner-Nordstrom spacetime are special cases. It is shown that
the existence of a constant and positive surface gravity $\kappa$ ensures the
existence of the Killing horizon, with the cross section homeomorphic to N.
|
[{'version': 'v1', 'created': 'Fri, 13 Apr 2001 20:11:04 GMT'}]
|
2007-05-23
|
[array(['Zhou', 'Bin', ''], dtype=object)]
|
1,620 |
2106.03866
|
Patricio Sanhueza
|
Patricio Sanhueza, Josep Miquel Girart, Marco Padovani, Daniele Galli,
Charles L. H. Hull, Qizhou Zhang, Paulo Cortes, Ian W. Stephens, Manuel
Fernandez-Lopez, James M. Jackson, Pau Frau, Patrick M. Kock, Benjamin Wu,
Luis A. Zapata, Fernando Olguin, Xing Lu, Andrea Silva, Ya-Wen Tang, Takeshi
Sakai, Andres E. Guzman, Ken'ichi Tatematsu, Fumitaka Nakamura, and Huei-Ru
Vivien Chen
|
Gravity Driven Magnetic Field at ~1000 au Scales in High-mass Star
Formation
|
Accepted for publications in ApJL (12 pages, 5 figures, Appendix)
| null |
10.3847/2041-8213/ac081c
| null |
astro-ph.GA astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A full understanding of high-mass star formation requires the study of one of
the most elusive components of the energy balance in the interstellar medium:
magnetic fields. We report ALMA 1.2 mm, high-resolution (700 au) dust
polarization and molecular line observations of the rotating hot molecular core
embedded in the high-mass star-forming region IRAS 18089-1732. The dust
continuum emission and magnetic field morphology present spiral-like features
resembling a whirlpool. The velocity field traced by the H13CO+ (J=3-2)
transition line reveals a complex structure with spiral filaments that are
likely infalling and rotating, dragging the field with them. We have modeled
the magnetic field and find that the best model corresponds to a weakly
magnetized core with a mass-to-magnetic-flux ratio (lambda) of 8.38. The
modeled magnetic field is dominated by a poloidal component, but with an
important contribution from the toroidal component that has a magnitude of 30%
of the poloidal component. Using the Davis-Chandrasekhar-Fermi method, we
estimate a magnetic field strength of 3.5 mG. At the spatial scales accessible
to ALMA, an analysis of the energy balance of the system indicates that gravity
overwhelms turbulence, rotation, and the magnetic field. We show that high-mass
star formation can occur in weakly magnetized environments, with gravity taking
the dominant role.
|
[{'version': 'v1', 'created': 'Mon, 7 Jun 2021 18:00:02 GMT'}]
|
2021-07-07
|
[array(['Sanhueza', 'Patricio', ''], dtype=object)
array(['Girart', 'Josep Miquel', ''], dtype=object)
array(['Padovani', 'Marco', ''], dtype=object)
array(['Galli', 'Daniele', ''], dtype=object)
array(['Hull', 'Charles L. H.', ''], dtype=object)
array(['Zhang', 'Qizhou', ''], dtype=object)
array(['Cortes', 'Paulo', ''], dtype=object)
array(['Stephens', 'Ian W.', ''], dtype=object)
array(['Fernandez-Lopez', 'Manuel', ''], dtype=object)
array(['Jackson', 'James M.', ''], dtype=object)
array(['Frau', 'Pau', ''], dtype=object)
array(['Kock', 'Patrick M.', ''], dtype=object)
array(['Wu', 'Benjamin', ''], dtype=object)
array(['Zapata', 'Luis A.', ''], dtype=object)
array(['Olguin', 'Fernando', ''], dtype=object)
array(['Lu', 'Xing', ''], dtype=object)
array(['Silva', 'Andrea', ''], dtype=object)
array(['Tang', 'Ya-Wen', ''], dtype=object)
array(['Sakai', 'Takeshi', ''], dtype=object)
array(['Guzman', 'Andres E.', ''], dtype=object)
array(['Tatematsu', "Ken'ichi", ''], dtype=object)
array(['Nakamura', 'Fumitaka', ''], dtype=object)
array(['Chen', 'Huei-Ru Vivien', ''], dtype=object)]
|
1,621 |
2112.05381
|
Qimin Chen
|
Qimin Chen, Johannes Merz, Aditya Sanghi, Hooman Shayani, Ali
Mahdavi-Amiri, Hao Zhang
|
UNIST: Unpaired Neural Implicit Shape Translation Network
|
CVPR 2022. project page: https://qiminchen.github.io/unist/
| null | null | null |
cs.CV cs.GR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce UNIST, the first deep neural implicit model for general-purpose,
unpaired shape-to-shape translation, in both 2D and 3D domains. Our model is
built on autoencoding implicit fields, rather than point clouds which
represents the state of the art. Furthermore, our translation network is
trained to perform the task over a latent grid representation which combines
the merits of both latent-space processing and position awareness, to not only
enable drastic shape transforms but also well preserve spatial features and
fine local details for natural shape translations. With the same network
architecture and only dictated by the input domain pairs, our model can learn
both style-preserving content alteration and content-preserving style transfer.
We demonstrate the generality and quality of the translation results, and
compare them to well-known baselines. Code is available at
https://qiminchen.github.io/unist/.
|
[{'version': 'v1', 'created': 'Fri, 10 Dec 2021 08:24:20 GMT'}
{'version': 'v2', 'created': 'Wed, 30 Mar 2022 16:30:56 GMT'}]
|
2022-03-31
|
[array(['Chen', 'Qimin', ''], dtype=object)
array(['Merz', 'Johannes', ''], dtype=object)
array(['Sanghi', 'Aditya', ''], dtype=object)
array(['Shayani', 'Hooman', ''], dtype=object)
array(['Mahdavi-Amiri', 'Ali', ''], dtype=object)
array(['Zhang', 'Hao', ''], dtype=object)]
|
1,622 |
1703.00944
|
Susan Kelly PhD
|
Susan Kelly, Carly Shinners, Katherine Zoroufy
|
Euphemia Lofton Haynes: Bringing Education Closer to the "Goal of
Perfection"
|
40 pages, 11 figures, Shorter version accepted for publication in AMS
Notices
| null | null | null |
math.HO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Martha Euphemia Lofton Haynes was the first African American woman to receive
a PhD in mathematics. She grew up in Washington DC, earned a bachelors degree
in mathematics from Smith College in 1914, a masters in education from
University of Chicago in 1930, and a doctorate in mathematics from the Catholic
University of America in 1943. Haynes spent over forty-five years teaching in
Washington DC from elementary and secondary level to university level. She was
active in many community service organizations where she served in leadership
roles and received numerous honors including being named a fellow of the
American Association for the Advancement of Science and being awarded a Papal
Medal. She was a member of the Washington DC school board from 1960 - 1968,
serving as president from June 1966 through July 1967. She played a leadership
role in ending the tracking system, which she argued discriminated against
African American students by assigning them to education tracks that did not
prepare them for college. This fight culminated in the 1967 Hobson v Hansen
court case, in which the judge ruled that tracking was discriminatory towards
poor and minority students.
|
[{'version': 'v1', 'created': 'Thu, 2 Mar 2017 20:45:18 GMT'}]
|
2017-03-06
|
[array(['Kelly', 'Susan', ''], dtype=object)
array(['Shinners', 'Carly', ''], dtype=object)
array(['Zoroufy', 'Katherine', ''], dtype=object)]
|
1,623 |
2304.01587
|
Charlotte Dietze
|
Charlotte Dietze
|
Semiclassical estimates for Schr\"odinger operators with Neumann
boundary conditions on H\"older domains
|
New and shortened version, 42 pages
| null | null | null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove a universal bound for the number of negative eigenvalues of
Schr\"odinger operators with Neumann boundary conditions on bounded H\"older
domains, under suitable assumptions on the H\"older exponent and the external
potential. Our bound yields the same semiclassical behaviour as the Weyl
asymptotics for smooth domains. We also discuss different cases where Weyl's
law holds and fails.
|
[{'version': 'v1', 'created': 'Tue, 4 Apr 2023 07:26:38 GMT'}
{'version': 'v2', 'created': 'Fri, 30 Jun 2023 11:59:52 GMT'}]
|
2023-07-03
|
[array(['Dietze', 'Charlotte', ''], dtype=object)]
|
1,624 |
1610.05245
|
R Loll
|
J. Ambj{\o}rn, J. Gizbert-Studnicki, A. G\"orlich, J. Jurkiewicz, N.
Klitgaard, R. Loll
|
Characteristics of the new phase in CDT
|
32 pages, 17 figures
| null |
10.1140/epjc/s10052-017-4710-3
| null |
hep-th gr-qc hep-lat
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Causal Dynamical Triangulations (CDT), a candidate theory of nonperturbative
quantum gravity in 4D, turns out to have a rich phase structure. We investigate
the recently discovered bifurcation phase $C_b$ and relate some of its
characteristics to the presence of singular vertices of very high order. The
transition lines separating this phase from the "time-collapsed" $B$-phase and
the de Sitter phase $C_{dS}$ are of great interest when searching for physical
scaling limits. The work presented here sheds light on the mechanisms behind
these transitions. First, we study how the $B$-$C_b$ transition signal depends
on the volume-fixing implemented in the simulations, and find results
compatible with the previously determined second-order character of the
transition. The transition persists in a transfer matrix formulation, where the
system's time extension is taken to be minimal. Second, we relate the new
$C_b$-$C_{dS}$ transition to the appearance of singular vertices, which leads
to a direct physical interpretation in terms of a breaking of the homogeneity
and isotropy observed in the de Sitter phase when crossing from $C_{dS}$ to the
bifurcation phase $C_b$.
|
[{'version': 'v1', 'created': 'Mon, 17 Oct 2016 18:17:03 GMT'}]
|
2017-04-05
|
[array(['Ambjørn', 'J.', ''], dtype=object)
array(['Gizbert-Studnicki', 'J.', ''], dtype=object)
array(['Görlich', 'A.', ''], dtype=object)
array(['Jurkiewicz', 'J.', ''], dtype=object)
array(['Klitgaard', 'N.', ''], dtype=object)
array(['Loll', 'R.', ''], dtype=object)]
|
1,625 |
2107.03571
|
Shu-Min Zhao
|
Shu-Min Zhao, Lu-Hao Su, Xing-Xing Dong, Tong-Tong Wang, Tai-Fu Feng
|
Study muon g-2 at two-loop level in the $U(1)_X$SSM
|
31 pages, 13 figures
| null |
10.1007/JHEP03(2022)101
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The new experiment data of muon g-2 is reported by the workers at Fermilab
National Accelerator Laboratory(FNAL). Combined with the previous Brookhaven
National Laboratory(BNL) E821 result, the departure from the standard model
prediction is about 4.2 $\sigma$. It strengthens our faith in the new physics.
$U(1)_X$SSM is the U(1) extension of the minimal supersymmetric standard model,
where we study the electroweak corrections to the anomalous magnetic dipole
moment of muon from the one-loop diagrams and some two-loop diagrams possessing
important contributions. These two-loop diagrams include Barr-Zee type, rainbow
type and diamond type. The virtual supersymmetric particles in these two-loop
diagrams are chargino, scalar neutrino, neutralino, scalar lepton, which are
supposed not very heavy to make relatively large corrections. We obtain the
Wilson coefficients of the dimension 6 operators inducing the anomalous
magnetic dipole moment of muon. The numerical results can reach $25\times
10^{-10}$ and even larger.
|
[{'version': 'v1', 'created': 'Thu, 8 Jul 2021 02:57:36 GMT'}
{'version': 'v2', 'created': 'Thu, 14 Oct 2021 08:16:34 GMT'}
{'version': 'v3', 'created': 'Mon, 10 Jan 2022 00:29:08 GMT'}]
|
2022-04-13
|
[array(['Zhao', 'Shu-Min', ''], dtype=object)
array(['Su', 'Lu-Hao', ''], dtype=object)
array(['Dong', 'Xing-Xing', ''], dtype=object)
array(['Wang', 'Tong-Tong', ''], dtype=object)
array(['Feng', 'Tai-Fu', ''], dtype=object)]
|
1,626 |
2103.06149
|
Youshan Zhang
|
Youshan Zhang and Brian D. Davison
|
Adversarial Regression Learning for Bone Age Estimation
|
27th Information Processing in Medical Imaging (IPMI)
| null | null | null |
cs.CV
|
http://creativecommons.org/publicdomain/zero/1.0/
|
Estimation of bone age from hand radiographs is essential to determine
skeletal age in diagnosing endocrine disorders and depicting the growth status
of children. However, existing automatic methods only apply their models to
test images without considering the discrepancy between training samples and
test samples, which will lead to a lower generalization ability. In this paper,
we propose an adversarial regression learning network (ARLNet) for bone age
estimation. Specifically, we first extract bone features from a fine-tuned
Inception V3 neural network and propose regression percentage loss for
training. To reduce the discrepancy between training and test data, we then
propose adversarial regression loss and feature reconstruction loss to
guarantee the transition from training data to test data and vice versa,
preserving invariant features from both training and test data. Experimental
results show that the proposed model outperforms state-of-the-art methods.
|
[{'version': 'v1', 'created': 'Wed, 10 Mar 2021 15:58:26 GMT'}]
|
2021-03-11
|
[array(['Zhang', 'Youshan', ''], dtype=object)
array(['Davison', 'Brian D.', ''], dtype=object)]
|
1,627 |
1401.7265
|
Matthias Gr\"uninger
|
Matthias Gr\"uninger
|
Multiplicative quadratic maps
| null | null | null | null |
math.RA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we prove that a multiplicative quadratic map between a unital
ring $K$ and a field $L$ is induced by a homomorphism from $K$ into $L$ or a
composition algebra over $L$. Especially we show that if $K$ is a field, then
every multiplicative quadratic map is the product of two field homomorphisms.
Moreover, we prove a multiplicative version of Artin's Theorem showing that a
product of field homomorphisms is unique up to multiplicity.
|
[{'version': 'v1', 'created': 'Tue, 28 Jan 2014 17:18:00 GMT'}
{'version': 'v2', 'created': 'Sun, 27 Jul 2014 17:14:17 GMT'}]
|
2014-07-29
|
[array(['Grüninger', 'Matthias', ''], dtype=object)]
|
1,628 |
0712.1264
|
Ren-Gui Zhu
|
Ren-Gui Zhu and An-Min Wang
|
Theoretical construction of 1D anyon models
|
9 pages and one figure
| null | null | null |
cond-mat.stat-mech
| null |
One-dimensional anyon models are renewedly constructed by using path integral
formalism. A statistical interaction term is introduced to realize the anyonic
exchange statistics. The quantum mechanics formulation of statistical
transmutation is presented.
|
[{'version': 'v1', 'created': 'Sat, 8 Dec 2007 07:47:11 GMT'}]
|
2007-12-11
|
[array(['Zhu', 'Ren-Gui', ''], dtype=object)
array(['Wang', 'An-Min', ''], dtype=object)]
|
1,629 |
1408.0405
|
Mois\'es Mart\'inez-Mares
|
Angel M. Mart\'inez-Arg\"uello, Mois\'es Mart\'inez-Mares, and Julio
C. Garc\'ia
|
Joint moments of proper delay times
| null |
J. Math. Phys. 55, 081901 (2014)
|
10.1063/1.4890559
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We calculate negative moments of the $N$-dimensional Laguerre distribution
for the orthogonal, unitary, and symplectic symmetries. These moments
correspond to those of the proper delay times, which are needed to determine
the statistical fluctuations of several transport properties through
classically chaotic cavities, like quantum dots and microwave cavities with
ideal coupling.
|
[{'version': 'v1', 'created': 'Sat, 2 Aug 2014 18:16:27 GMT'}]
|
2017-11-28
|
[array(['Martínez-Argüello', 'Angel M.', ''], dtype=object)
array(['Martínez-Mares', 'Moisés', ''], dtype=object)
array(['García', 'Julio C.', ''], dtype=object)]
|
1,630 |
1908.06211
|
Soham Sinha
|
Soham Sinha and Richard West and Ahmad Golchin
|
PAStime: Progress-aware Scheduling for Time-critical Computing
|
24 pages
| null |
10.4230/LIPIcs.ECRTS.2020.3
| null |
cs.OS
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Over-estimation of worst-case execution times (WCETs) of real-time tasks
leads to poor resource utilization. In a mixed-criticality system (MCS), the
over-provisioning of CPU time to accommodate the WCETs of highly critical tasks
may lead to degraded service for less critical tasks. In this paper, we present
PAStime, a novel approach to monitor and adapt the runtime progress of highly
time-critical applications, to allow for improved service to lower criticality
tasks. In PAStime, CPU time is allocated to time-critical tasks according to
the delays they experience as they progress through their control flow graphs.
This ensures that as much time as possible is made available to improve the
Quality-of-Service of less critical tasks, while high-criticality tasks are
compensated after their delays.
In this paper, we integrate PAStime with Adaptive Mixed-criticality (AMC)
scheduling. The LO-mode budget of a high-criticality task is adjusted according
to the delay observed at execution checkpoints. This is the first
implementation of AMC in the scheduling framework Using LITMUS-RT, which is
extended with our PAStime runtime policy and tested with real-time Linux
applications such as object classification and detection. We observe in our
experimental evaluation that AMC-PAStime significantly improves the utilization
of the low-criticality tasks while guaranteeing service to high-criticality
tasks.
|
[{'version': 'v1', 'created': 'Sat, 17 Aug 2019 00:24:07 GMT'}
{'version': 'v2', 'created': 'Mon, 31 May 2021 15:53:06 GMT'}]
|
2021-06-01
|
[array(['Sinha', 'Soham', ''], dtype=object)
array(['West', 'Richard', ''], dtype=object)
array(['Golchin', 'Ahmad', ''], dtype=object)]
|
1,631 |
1704.05492
|
David Schlachtberger
|
David P. Schlachtberger, Tom Brown, Stefan Schramm, Martin Greiner
|
The Benefits of Cooperation in a Highly Renewable European Electricity
Network
|
15 pages, 10 figures, accepted by Energy
| null |
10.1016/j.energy.2017.06.004
| null |
physics.soc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
To reach ambitious European CO$_2$ emission reduction targets, most scenarios
of future European electricity systems rely on large shares of wind and solar
photovoltaic power generation. We interpolate between two concepts for
balancing the variability of these renewable sources: balancing at continental
scales using the transmission grid and balancing locally with storage. This
interpolation is done by systematically restricting transmission capacities
from the optimum level to zero. We run techno-economic cost optimizations for
the capacity investment and dispatch of wind, solar, hydroelectricity, natural
gas power generation and transmission, as well as storage options such as
pumped-hydro, battery, and hydrogen storage. The simulations assume a 95%
CO$_2$ emission reduction compared to 1990, and are run over a full historical
year of weather and electricity demand for 30 European countries. In the
cost-optimal system with high levels of transmission expansion, energy
generation is dominated by wind (65%) and hydro (15%), with average system
costs comparable to today's system. Restricting transmission shifts the balance
in favour of solar and storage, driving up costs by a third. As the restriction
is relaxed, 85% of the cost benefits of the optimal grid expansion can be
captured already with only 44% of the transmission volume.
|
[{'version': 'v1', 'created': 'Tue, 18 Apr 2017 18:39:00 GMT'}
{'version': 'v2', 'created': 'Fri, 16 Jun 2017 11:36:10 GMT'}]
|
2017-06-19
|
[array(['Schlachtberger', 'David P.', ''], dtype=object)
array(['Brown', 'Tom', ''], dtype=object)
array(['Schramm', 'Stefan', ''], dtype=object)
array(['Greiner', 'Martin', ''], dtype=object)]
|
1,632 |
1905.09527
|
Huaying Liu
|
Hua-Ying Liu, Xiao-Hui Tian, Changsheng Gu, Pengfei Fan, Xin Ni, Ran
Yang, Ji-Ning Zhang, Mingzhe Hu, Yang Niu, Xun Cao, Xiaopeng Hu, Gang Zhao,
Yan-Qing Lu, Zhenda Xie, Yan-Xiao Gong, and Shi-Ning Zhu
|
Drone-based all-weather entanglement distribution
|
16 pages, 4 figures
|
National Science Review,Volume 7, Issue 5, Pages 921-928, 2020
|
10.1093/nsr/nwz227
| null |
quant-ph physics.app-ph physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The quantum satellite is a cornerstone towards practical free-space quantum
network and overcomes the photon loss over large distance. However, challenges
still exist including real-time all-location coverage and multi-node
construction, which may be complemented by the diversity of modern drones. Here
we demonstrate the first drone-based entanglement distribution at all-weather
conditions over 200 meters (test field limited), and the
Clauser-Horne-Shimony-Holt S-parameter exceeds 2.49, within 35 kg take-off
weight. With symmetric transmitter and receiver beam apertures and
single-mode-fiber-coupling technology, such progress is ready for future
quantum network with multi-node expansion. This network can be further
integrated in picture-drone sizes for plug-and-play local-area coverage, or
loaded onto high-altitude drones for wide-area coverage, which adds flexibility
while connecting to the existing satellites and ground fiber-based quantum
network.
|
[{'version': 'v1', 'created': 'Thu, 23 May 2019 08:21:36 GMT'}]
|
2020-07-13
|
[array(['Liu', 'Hua-Ying', ''], dtype=object)
array(['Tian', 'Xiao-Hui', ''], dtype=object)
array(['Gu', 'Changsheng', ''], dtype=object)
array(['Fan', 'Pengfei', ''], dtype=object)
array(['Ni', 'Xin', ''], dtype=object)
array(['Yang', 'Ran', ''], dtype=object)
array(['Zhang', 'Ji-Ning', ''], dtype=object)
array(['Hu', 'Mingzhe', ''], dtype=object)
array(['Niu', 'Yang', ''], dtype=object)
array(['Cao', 'Xun', ''], dtype=object)
array(['Hu', 'Xiaopeng', ''], dtype=object)
array(['Zhao', 'Gang', ''], dtype=object)
array(['Lu', 'Yan-Qing', ''], dtype=object)
array(['Xie', 'Zhenda', ''], dtype=object)
array(['Gong', 'Yan-Xiao', ''], dtype=object)
array(['Zhu', 'Shi-Ning', ''], dtype=object)]
|
1,633 |
2101.02634
|
Dongjie Wang
|
Dongjie Wang, Pengyang Wang, Kunpeng Liu, Yuanchun Zhou, Charles
Hughes, Yanjie Fu
|
Reinforced Imitative Graph Representation Learning for Mobile User
Profiling: An Adversarial Training Perspective
|
AAAI 2021
| null | null | null |
cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we study the problem of mobile user profiling, which is a
critical component for quantifying users' characteristics in the human mobility
modeling pipeline. Human mobility is a sequential decision-making process
dependent on the users' dynamic interests. With accurate user profiles, the
predictive model can perfectly reproduce users' mobility trajectories. In the
reverse direction, once the predictive model can imitate users' mobility
patterns, the learned user profiles are also optimal. Such intuition motivates
us to propose an imitation-based mobile user profiling framework by exploiting
reinforcement learning, in which the agent is trained to precisely imitate
users' mobility patterns for optimal user profiles. Specifically, the proposed
framework includes two modules: (1) representation module, which produces state
combining user profiles and spatio-temporal context in real-time; (2) imitation
module, where Deep Q-network (DQN) imitates the user behavior (action) based on
the state that is produced by the representation module. However, there are two
challenges in running the framework effectively. First, epsilon-greedy strategy
in DQN makes use of the exploration-exploitation trade-off by randomly pick
actions with the epsilon probability. Such randomness feeds back to the
representation module, causing the learned user profiles unstable. To solve the
problem, we propose an adversarial training strategy to guarantee the
robustness of the representation module. Second, the representation module
updates users' profiles in an incremental manner, requiring integrating the
temporal effects of user profiles. Inspired by Long-short Term Memory (LSTM),
we introduce a gated mechanism to incorporate new and old user characteristics
into the user profile.
|
[{'version': 'v1', 'created': 'Thu, 7 Jan 2021 17:10:00 GMT'}]
|
2021-01-08
|
[array(['Wang', 'Dongjie', ''], dtype=object)
array(['Wang', 'Pengyang', ''], dtype=object)
array(['Liu', 'Kunpeng', ''], dtype=object)
array(['Zhou', 'Yuanchun', ''], dtype=object)
array(['Hughes', 'Charles', ''], dtype=object)
array(['Fu', 'Yanjie', ''], dtype=object)]
|
1,634 |
1405.3541
|
Jeremy Stevens
|
Jeremy Stevens, Edward F. Brown, Andrew Cumming, Richard Cyburt,
Hendrik Schatz
|
Carbon Synthesis in Steady-State Hydrogen and Helium Burning On
Accreting Neutron Stars
|
8 pages, submitted to ApJ
| null |
10.1088/0004-637X/791/2/106
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Superbursts from accreting neutron stars probe nuclear reactions at extreme
densities ($\rho \approx 10^{9}~g\,cm^{-3}$) and temperatures ($T>10^9~K$).
These bursts ($\sim$1000 times more energetic than type I X-ray bursts) are
most likely triggered by unstable ignition of carbon in a sea of heavy nuclei
made during the rp-process of regular type I X-ray bursts (where the
accumulated hydrogen and helium are burned). An open question is the origin of
sufficient amounts of carbon, which is largely destroyed during the rp-process
in X-ray bursts. We explore carbon production in steady-state burning via the
rp-process, which might occur together with unstable burning in systems showing
superbursts. We find that for a wide range of accretion rates and accreted
helium mass fractions large amounts of carbon are produced, even for systems
that accrete solar composition. This makes stable hydrogen and helium burning a
viable source of carbon to trigger superbursts. We also investigate the
sensitivity of the results to nuclear reactions. We find that the
$^{14}$O($\alpha$,p)$^{17}$F reaction rate introduces by far the largest
uncertainties in the $^{12}$C yield.
|
[{'version': 'v1', 'created': 'Wed, 14 May 2014 15:35:28 GMT'}]
|
2015-06-19
|
[array(['Stevens', 'Jeremy', ''], dtype=object)
array(['Brown', 'Edward F.', ''], dtype=object)
array(['Cumming', 'Andrew', ''], dtype=object)
array(['Cyburt', 'Richard', ''], dtype=object)
array(['Schatz', 'Hendrik', ''], dtype=object)]
|
1,635 |
1311.0559
|
Qing Wan
|
Li Qiang Zhu, Chang Jin Wan, Li Qiang Guo, Yi Shi, and Qing Wan
|
Artificial Synapse Network on Inorganic Proton Conductor for
Neuromorphic Systems Applications
| null | null |
10.1038/ncomms4158
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The basic units in our brain are neurons and each neuron has more than 1000
synapse connections. Synapse is the basic structure for information transfer in
an ever-changing manner, and short-term plasticity allows synapses to perform
critical computational functions in neural circuits. Therefore the major
challenge for the hardware implementation of neuromorphic computation is to
develop artificial synapse. Here, in-plane oxide-based artificial synapse
network coupled by proton neurotransmitters are self-assembled on glass
substrates at room-temperature. A strong lateral modulation is observed due to
the proton migration in the nanogranular phosphorus-doped SiO2 electrolyte
films. Functional roles of short-term plasticity, including paired-pulse
facilitation, dynamic filtering and spatiotemporally correlated signal
processing are mimicked. Such in-plane oxide-based protonic/electronic hybrid
synapse network proposed here are interesting for building future neuromorphic
systems.
|
[{'version': 'v1', 'created': 'Mon, 4 Nov 2013 01:24:32 GMT'}]
|
2014-03-05
|
[array(['Zhu', 'Li Qiang', ''], dtype=object)
array(['Wan', 'Chang Jin', ''], dtype=object)
array(['Guo', 'Li Qiang', ''], dtype=object)
array(['Shi', 'Yi', ''], dtype=object)
array(['Wan', 'Qing', ''], dtype=object)]
|
1,636 |
2209.11138
|
Daniela Briola
|
Elson Kurian, Daniela Briola, Pietro Braione, Giovanni Denaro
|
Automatically Generating Test Cases for Safety-Critical Software via
Symbolic Execution
| null | null | null | null |
cs.SE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Automated test generation based on symbolic execution can be beneficial for
systematically testing safety-critical software, to facilitate test engineers
to pursue the strict testing requirements mandated by the certification
standards, while controlling at the same time the costs of the testing process.
At the same time, the development of safety-critical software is often
constrained with programming languages or coding conventions that ban
linguistic features which are believed to downgrade the safety of the programs,
e.g., they do not allow dynamic memory allocation and variable-length arrays,
limit the way in which loops are used, forbid recursion, and bound the
complexity of control conditions. As a matter of facts, these linguistic
features are also the main efficiency-blockers for the test generation
approaches based on symbolic execution at the state of the art. This paper
contributes new evidence of the effectiveness of generating test cases with
symbolic execution for a significant class of industrial safety
critical-systems. We specifically focus on Scade, a largely adopted model-based
development language for safety-critical embedded software, and we report on a
case study in which we exploited symbolic execution to automatically generate
test cases for a set of safety-critical programs developed in Scade. To this
end, we introduce a novel test generator that we developed in a recent
industrial project on testing safety-critical railway software written in
Scade, and we report on our experience of using this test generator for testing
a set of Scade programs that belong to the development of an on-board signaling
unit for high-speed rail. The results provide empirically evidence that
symbolic execution is indeed a viable approach for generating high-quality test
suites for the safety-critical programs considered in our case study.
|
[{'version': 'v1', 'created': 'Thu, 22 Sep 2022 16:32:45 GMT'}]
|
2022-09-23
|
[array(['Kurian', 'Elson', ''], dtype=object)
array(['Briola', 'Daniela', ''], dtype=object)
array(['Braione', 'Pietro', ''], dtype=object)
array(['Denaro', 'Giovanni', ''], dtype=object)]
|
1,637 |
1901.08840
|
Kees Middelburg
|
J. A. Bergstra, C. A. Middelburg
|
Program algebra for Turing-machine programs
|
19 pages, Sect. 2--4 are largely shortened versions of Sect. 2--4 of
arXiv:1808.04264, which, in turn, draw from preliminary sections of several
earlier papers; 21 pages, some remarks in Sect.1 and Sect.10 added
|
Scientific Annals of Computer Science 29(2):113--139 (2019)
|
10.7561/SACS.2019.2.113
| null |
cs.PL cs.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper presents an algebraic theory of instruction sequences with
instructions for Turing tapes as basic instructions, the behaviours produced by
the instruction sequences concerned under execution, and the interaction
between such behaviours and Turing tapes provided by an execution environment.
This theory provides a setting for the development of theory in areas such as
computability and computational complexity that distinguishes itself by
offering the possibility of equational reasoning and being more general than
the setting provided by a known version of the Turing-machine model of
computation. The theory is essentially an instantiation of a parameterized
algebraic theory which is the basis of a line of research in which issues
relating to a wide variety of subjects from computer science have been
rigorously investigated thinking in terms of instruction sequences.
|
[{'version': 'v1', 'created': 'Fri, 25 Jan 2019 11:39:36 GMT'}
{'version': 'v2', 'created': 'Sat, 7 Dec 2019 12:39:19 GMT'}]
|
2020-01-06
|
[array(['Bergstra', 'J. A.', ''], dtype=object)
array(['Middelburg', 'C. A.', ''], dtype=object)]
|
1,638 |
1810.12576
|
Alexander Matyasko
|
Alexander Matyasko, Lap-Pui Chau
|
Improved Network Robustness with Adversary Critic
| null | null | null | null |
cs.LG cs.CV stat.ML
|
http://creativecommons.org/publicdomain/zero/1.0/
|
Ideally, what confuses neural network should be confusing to humans. However,
recent experiments have shown that small, imperceptible perturbations can
change the network prediction. To address this gap in perception, we propose a
novel approach for learning robust classifier. Our main idea is: adversarial
examples for the robust classifier should be indistinguishable from the regular
data of the adversarial target. We formulate a problem of learning robust
classifier in the framework of Generative Adversarial Networks (GAN), where the
adversarial attack on classifier acts as a generator, and the critic network
learns to distinguish between regular and adversarial images. The classifier
cost is augmented with the objective that its adversarial examples should
confuse the adversary critic. To improve the stability of the adversarial
mapping, we introduce adversarial cycle-consistency constraint which ensures
that the adversarial mapping of the adversarial examples is close to the
original. In the experiments, we show the effectiveness of our defense. Our
method surpasses in terms of robustness networks trained with adversarial
training. Additionally, we verify in the experiments with human annotators on
MTurk that adversarial examples are indeed visually confusing. Codes for the
project are available at https://github.com/aam-at/adversary_critic.
|
[{'version': 'v1', 'created': 'Tue, 30 Oct 2018 08:33:46 GMT'}]
|
2018-10-31
|
[array(['Matyasko', 'Alexander', ''], dtype=object)
array(['Chau', 'Lap-Pui', ''], dtype=object)]
|
1,639 |
1904.08048
|
Gianluca Bianchin
|
Gianluca Bianchin, Fabio Pasqualetti, and Soumya Kundu
|
Resilience of Traffic Networks with Partially Controlled Routing
|
Accepted for presentation at the IEEE 2019 American Control
Conference
| null | null | null |
math.OC cs.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper investigates the use of Infrastructure-To-Vehicle (I2V)
communication to generate routing suggestions for drivers in transportation
systems, with the goal of optimizing a measure of overall network congestion.
We define link-wise levels of trust to tolerate the non-cooperative behavior of
part of the driver population, and we propose a real-time optimization
mechanism that adapts to the instantaneous network conditions and to sudden
changes in the levels of trust. Our framework allows us to quantify the
improvement in travel time in relation to the degree at which drivers follow
the routing suggestions. We then study the resilience of the system, measured
as the smallest change in routing choices that results in roads reaching their
maximum capacity. Interestingly, our findings suggest that fluctuations in the
extent to which drivers follow the provided routing suggestions can cause
failures of certain links. These results imply that the benefits of using
Infrastructure-To-Vehicle communication come at the cost of new fragilities,
that should be appropriately addressed in order to guarantee the reliable
operation of the infrastructure.
|
[{'version': 'v1', 'created': 'Wed, 17 Apr 2019 01:54:26 GMT'}]
|
2019-04-18
|
[array(['Bianchin', 'Gianluca', ''], dtype=object)
array(['Pasqualetti', 'Fabio', ''], dtype=object)
array(['Kundu', 'Soumya', ''], dtype=object)]
|
1,640 |
1009.1385
|
Eleonora Troja
|
Eleonora Troja, Stephan Rosswog, Neil Gehrels
|
Precursors of short gamma-ray bursts
|
8 pages, 2 figures, accepted for publication in The Astrophysical
Journal
| null |
10.1088/0004-637X/723/2/1711
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We carried out a systematic search of precursors on the sample of short GRBs
observed by Swift. We found that ~8-10% of short GRBs display such early
episode of emission. One burst (GRB 090510) shows two precursor events, the
former ~13 s and the latter ~0.5 s before the GRB. We did not find any
substantial difference between the precursor and the main GRB emission, and
between short GRBs with and without precursors. We discuss possible mechanisms
to reproduce the observed precursor emission within the scenario of compact
object mergers. The implications of our results on quantum gravity constraints
are also discussed.
|
[{'version': 'v1', 'created': 'Tue, 7 Sep 2010 20:00:07 GMT'}]
|
2015-05-19
|
[array(['Troja', 'Eleonora', ''], dtype=object)
array(['Rosswog', 'Stephan', ''], dtype=object)
array(['Gehrels', 'Neil', ''], dtype=object)]
|
1,641 |
1602.01068
|
Julien Melleray
|
Ita\"i Ben Yaacov, Julien Melleray, Todor Tsankov
|
Metrizable universal minimal flows of Polish groups have a comeagre
orbit
| null | null | null | null |
math.DS math.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove that, whenever $G$ is a Polish group with metrizable universal
minimal flow $M(G)$, there exists a comeagre orbit in $M(G)$. It then follows
that there exists an extremely amenable, closed, coprecompact $G^*$ of $G$ such
that $M(G) = \hat{G/G^*}$.
|
[{'version': 'v1', 'created': 'Tue, 2 Feb 2016 20:21:25 GMT'}
{'version': 'v2', 'created': 'Tue, 9 Feb 2016 17:11:33 GMT'}
{'version': 'v3', 'created': 'Wed, 11 Jan 2017 21:20:44 GMT'}]
|
2017-01-13
|
[array(['Yaacov', 'Itaï Ben', ''], dtype=object)
array(['Melleray', 'Julien', ''], dtype=object)
array(['Tsankov', 'Todor', ''], dtype=object)]
|
1,642 |
nucl-th/0502072
|
N. K. Timofeyuk
|
N. K. Timofeyuk and P. Descouvemont
|
Asymptotic normalization coefficients for mirror virtual nucleon decays
in a microscopic cluster model
|
12 pages, submitted to Phys. Rev. C
|
Phys.Rev.C71:064305,2005
|
10.1103/PhysRevC.71.064305
| null |
nucl-th
| null |
It has been suggested recently (Phys. Rev. Lett. 91, 232501 (2003)) that
charge symmetry of nucleon-nucleon interactions relates the Asymptotic
Normalization Coefficients (ANCs) of proton and neutron virtual decays of
mirror nuclei. This relation is given by a simple analytical formula which
involves proton and neutron separation energies, charges of residual nuclei and
the range of their strong interaction with the last nucleon. Relation between
mirror ANCs, if understood properly, can be used to predict astrophysically
relevant direct proton capture cross sections using neutron ANCs measured with
stable beams. In this work, we calculate one-nucleon ANCs for several light
mirror pairs, using microscopic two-, three- and four-cluster models, and
compare the ratio of mirror ANCs to the predictions of the simple analytic
formula. We also investigate mirror symmetry between other characteristics of
mirror one-nucleon overlap integrals, namely, spectroscopic factors and
single-particle ANCs.
|
[{'version': 'v1', 'created': 'Wed, 23 Feb 2005 11:27:29 GMT'}]
|
2011-08-11
|
[array(['Timofeyuk', 'N. K.', ''], dtype=object)
array(['Descouvemont', 'P.', ''], dtype=object)]
|
1,643 |
2304.09635
|
Masaharu Ishikawa
|
Ippei Ishii, Masaharu Ishikawa, Yuya Koda, Hironobu Naoe
|
Positive flow-spines and contact 3-manifolds, II
|
17 pages and 22 figures. This paper covers Section 8 of the preprint
arXiv:1912.05774v3 [math.GT]. The part until Section 7 is covered in
arXiv:1912.05774v4 [math.GT] as a separate paper
| null | null | null |
math.GT math.SG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper corresponds to Section 8 of arXiv:1912.05774v3 [math.GT]. The
contents until Section 7 are published in Annali di Matematica Pura ed
Applicata as a separate paper. In that paper, it is proved that for any
positive flow-spine P of a closed, oriented 3-manifold M, there exists a unique
contact structure supported by P up to isotopy. In particular, this defines a
map from the set of isotopy classes of positive flow-spines of M to the set of
isotopy classes of contact structures on M. In this paper, we show that this
map is surjective. As a corollary, we show that any flow-spine can be deformed
to a positive flow-spine by applying first and second regular moves
successively.
|
[{'version': 'v1', 'created': 'Wed, 19 Apr 2023 13:19:48 GMT'}]
|
2023-04-20
|
[array(['Ishii', 'Ippei', ''], dtype=object)
array(['Ishikawa', 'Masaharu', ''], dtype=object)
array(['Koda', 'Yuya', ''], dtype=object)
array(['Naoe', 'Hironobu', ''], dtype=object)]
|
1,644 |
2102.13023
|
Davide Caputo
|
Andrea Ranieri, Davide Caputo, Luca Verderame, Alessio Merlo, Luca
Caviglione
|
Deep Adversarial Learning on Google Home devices
| null | null | null | null |
cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Smart speakers and voice-based virtual assistants are core components for the
success of the IoT paradigm. Unfortunately, they are vulnerable to various
privacy threats exploiting machine learning to analyze the generated encrypted
traffic. To cope with that, deep adversarial learning approaches can be used to
build black-box countermeasures altering the network traffic (e.g., via packet
padding) and its statistical information. This letter showcases the inadequacy
of such countermeasures against machine learning attacks with a dedicated
experimental campaign on a real network dataset. Results indicate the need for
a major re-engineering to guarantee the suitable protection of commercially
available smart speakers.
|
[{'version': 'v1', 'created': 'Thu, 25 Feb 2021 17:29:00 GMT'}]
|
2021-02-26
|
[array(['Ranieri', 'Andrea', ''], dtype=object)
array(['Caputo', 'Davide', ''], dtype=object)
array(['Verderame', 'Luca', ''], dtype=object)
array(['Merlo', 'Alessio', ''], dtype=object)
array(['Caviglione', 'Luca', ''], dtype=object)]
|
1,645 |
1204.4449
|
Georg Feulner
|
Georg Feulner
|
The faint young Sun problem
|
32 pages, 8 figures. Invited review paper accepted for publication in
Reviews of Geophysics
|
Rev.Geophys. 50 (2012), RG2006
|
10.1029/2011RG000375
| null |
astro-ph.EP physics.ao-ph physics.geo-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For more than four decades, scientists have been trying to find an answer to
one of the most fundamental questions in paleoclimatology, the `faint young Sun
problem'. For the early Earth, models of stellar evolution predict a solar
energy input to the climate system which is about 25% lower than today. This
would result in a completely frozen world over the first two billion years in
the history of our planet, if all other parameters controlling Earth's climate
had been the same. Yet there is ample evidence for the presence of liquid
surface water and even life in the Archean (3.8 to 2.5 billion years before
present), so some effect (or effects) must have been compensating for the faint
young Sun. A wide range of possible solutions have been suggested and explored
during the last four decades, with most studies focusing on higher
concentrations of atmospheric greenhouse gases like carbon dioxide, methane or
ammonia. All of these solutions present considerable difficulties, however, so
the faint young Sun problem cannot be regarded as solved. Here I review
research on the subject, including the latest suggestions for solutions of the
faint young Sun problem and recent geochemical constraints on the composition
of Earth's early atmosphere. Furthermore, I will outline the most promising
directions for future research. In particular I would argue that both improved
geochemical constraints on the state of the Archean climate system and
numerical experiments with state-of-the-art climate models are required to
finally assess what kept the oceans on the Archean Earth from freezing over
completely.
|
[{'version': 'v1', 'created': 'Thu, 19 Apr 2012 20:00:01 GMT'}]
|
2012-05-28
|
[array(['Feulner', 'Georg', ''], dtype=object)]
|
1,646 |
1501.03056
|
Stephen D. Miller
|
Evgeni Begelfor, Stephen D. Miller, and Ramarathnam Venkatesan
|
Non-Abelian Analogs of Lattice Rounding
|
30 pages
| null | null | null |
math.GR cs.CR math.CO math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Lattice rounding in Euclidean space can be viewed as finding the nearest
point in the orbit of an action by a discrete group, relative to the norm
inherited from the ambient space. Using this point of view, we initiate the
study of non-abelian analogs of lattice rounding involving matrix groups. In
one direction, we give an algorithm for solving a normed word problem when the
inputs are random products over a basis set, and give theoretical justification
for its success. In another direction, we prove a general inapproximability
result which essentially rules out strong approximation algorithms (i.e., whose
approximation factors depend only on dimension) analogous to LLL in the general
case.
|
[{'version': 'v1', 'created': 'Tue, 13 Jan 2015 15:54:05 GMT'}]
|
2015-01-14
|
[array(['Begelfor', 'Evgeni', ''], dtype=object)
array(['Miller', 'Stephen D.', ''], dtype=object)
array(['Venkatesan', 'Ramarathnam', ''], dtype=object)]
|
1,647 |
cond-mat/9811009
|
Abhik
|
Abhik Basu, Jayanta K Bhattacharjee, and Sriram Ramaswamy
|
Mean Magnetic Field and Noise Cross-Correlation in Magnetohydrodynamic
Turbulence: Results from a One-Dimensional Model
|
8 pages, submitted to European Physical Journal B
| null |
10.1007/s100510050817
| null |
cond-mat
| null |
We show that a recently proposed [J. Fleischer and P.H. Diamond, {\em Phys.
Rev. E}{\bf 58}, R2709 (1998)] one-dimensional Burgers-like model for
magnetohydrodynamics (MHD) is in effect identical to existing models for
drifting lines and sedimenting lattices. We use the model to demonstrate,
contrary to claims in the literature, that the energy spectrum of MHD
turbulence should be independent of mean magnetic field and that
cross-correlations between the noise sources for the velocity and magnetic
fields cannot change the structure of the equations under renormalisation. We
comment on the scaling and the multiscaling properties of the stochastically
forced version of the model.
|
[{'version': 'v1', 'created': 'Mon, 2 Nov 1998 09:21:26 GMT'}]
|
2009-10-31
|
[array(['Basu', 'Abhik', ''], dtype=object)
array(['Bhattacharjee', 'Jayanta K', ''], dtype=object)
array(['Ramaswamy', 'Sriram', ''], dtype=object)]
|
1,648 |
cond-mat/0108173
|
Nejat Bulut
|
N. Bulut
|
Analysis of the Knight shift data on Li and Zn substituted YBCO
|
24 pages, 15 figures, to appear in Physica C
| null |
10.1016/S0921-4534(01)00755-9
| null |
cond-mat.str-el cond-mat.supr-con
| null |
The Knight shift data on Li and Zn substituted YBa$_2$Cu$_3$O$_{6+x}$ are
analysed using an itinerant model with short-range antiferromagnetic
correlations. The model parameters, which are determined by fitting the
experimental data on the transverse nuclear relaxation rate $T_2^{-1}$ of pure
YBa$_2$Cu$_3$O$_{6+x}$, are used to calculate the Knight shifts for various
nuclei around a nonmagnetic impurity located in the CuO$_2$ planes. The
calculations are carried out for Li and Zn impurities substituted into
optimally doped and underdoped YBa$_2$Cu$_3$O$_{6+x}$. The results are compared
with the $^7$Li and $^{89}$Y Knight shift measurements on these materials.
|
[{'version': 'v1', 'created': 'Fri, 10 Aug 2001 10:44:32 GMT'}]
|
2009-11-07
|
[array(['Bulut', 'N.', ''], dtype=object)]
|
1,649 |
hep-th/0211234
|
Bo Feng
|
Bo Feng and Yang-Hui He
|
Seiberg Duality in Matrix Models II
|
11 pages, comments added
|
Phys.Lett. B562 (2003) 339-346
|
10.1016/S0370-2693(03)00597-5
|
UPR-1022-T
|
hep-th
| null |
In this paper we continue the investigation, within the context of the
Dijkgraaf-Vafa Programme, of Seiberg duality in matrix models as initiated in
hep-th/0211202, by allowing degenerate mass deformations. In this case, there
are some massless fields which remain and the theory has a moduli space. With
this illustrative example, we propose a general methodology for performing the
relevant matrix model integrations and addressing the corresponding field
theories which have non-trivial IR behaviour, and which may or may not have
tree-level superpotentials.
|
[{'version': 'v1', 'created': 'Sun, 24 Nov 2002 18:25:52 GMT'}
{'version': 'v2', 'created': 'Wed, 16 Apr 2003 22:16:41 GMT'}]
|
2009-11-07
|
[array(['Feng', 'Bo', ''], dtype=object)
array(['He', 'Yang-Hui', ''], dtype=object)]
|
1,650 |
1209.1042
|
Christian Millichap
|
Christian Millichap
|
Factorial growth rates for the number of hyperbolic 3-manifolds of a
given volume
|
13 pages, 6 figures
|
Proc. Amer. Math. Soc. 143 (2015), no. 5, 2201-2214
|
10.1090/S0002-9939-2015-12395-7
| null |
math.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The work of J{\o}rgensen and Thurston shows that there is a finite number
N(v) of orientable hyperbolic 3-manifolds with any given volume v. In this
paper, we construct examples showing that the number of hyperbolic knot
complements with a given volume v can grow at least factorially fast with v. A
similar statement holds for closed hyperbolic 3-manifolds, obtained via Dehn
surgery. Furthermore, we give explicit estimates for lower bounds of N(v) in
terms of v for these examples. These results improve upon the work of Hodgson
and Masai, which describes examples that grow exponentially fast with v. Our
constructions rely on performing volume preserving mutations along Conway
spheres and on the classification of Montesinos knots.
|
[{'version': 'v1', 'created': 'Wed, 5 Sep 2012 16:59:39 GMT'}
{'version': 'v2', 'created': 'Tue, 5 Nov 2013 00:56:02 GMT'}]
|
2015-06-02
|
[array(['Millichap', 'Christian', ''], dtype=object)]
|
1,651 |
2207.06101
|
Boeun Kim
|
Boeun Kim, Hyung Jin Chang, Jungho Kim, and Jin Young Choi
|
Global-local Motion Transformer for Unsupervised Skeleton-based Action
Learning
|
Accepted by ECCV 2022
| null | null | null |
cs.CV cs.AI
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
We propose a new transformer model for the task of unsupervised learning of
skeleton motion sequences. The existing transformer model utilized for
unsupervised skeleton-based action learning is learned the instantaneous
velocity of each joint from adjacent frames without global motion information.
Thus, the model has difficulties in learning the attention globally over
whole-body motions and temporally distant joints. In addition, person-to-person
interactions have not been considered in the model. To tackle the learning of
whole-body motion, long-range temporal dynamics, and person-to-person
interactions, we design a global and local attention mechanism, where, global
body motions and local joint motions pay attention to each other. In addition,
we propose a novel pretraining strategy, multi-interval pose displacement
prediction, to learn both global and local attention in diverse time ranges.
The proposed model successfully learns local dynamics of the joints and
captures global context from the motion sequences. Our model outperforms
state-of-the-art models by notable margins in the representative benchmarks.
Codes are available at https://github.com/Boeun-Kim/GL-Transformer.
|
[{'version': 'v1', 'created': 'Wed, 13 Jul 2022 10:18:07 GMT'}]
|
2022-07-14
|
[array(['Kim', 'Boeun', ''], dtype=object)
array(['Chang', 'Hyung Jin', ''], dtype=object)
array(['Kim', 'Jungho', ''], dtype=object)
array(['Choi', 'Jin Young', ''], dtype=object)]
|
1,652 |
2305.15632
|
Takeharu Shiraga
|
Colin Cooper, Tomasz Radzik, Takeharu Shiraga
|
Discrete Incremental Voting
|
27 pages, 2 figures
| null | null | null |
math.PR cs.DC cs.DM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a type of pull voting suitable for discrete numeric opinions
which can be compared on a linear scale, for example, 1 ('disagree strongly'),
2 ('disagree'), $\ldots,$ 5 ('agree strongly'). On observing the opinion of a
random neighbour, a vertex changes its opinion incrementally towards the value
of the neighbour's opinion, if different. For opinions drawn from a set
$\{1,2,\ldots,k\}$, the opinion of the vertex would change by $+1$ if the
opinion of the neighbour is larger, or by $-1$, if it is smaller.
It is not clear how to predict the outcome of this process, but we observe
that the total weight of the system, that is, the sum of the individual
opinions of all vertices, is a martingale. This allows us analyse the outcome
of the process on some classes of dense expanders such as clique graphs $K_n$
and random graphs $ G_{n,p}$ for suitably large $p$. If the average of the
original opinions satisfies $i \le c \le i+1$ for some integer $i$, then the
asymptotic probability that opinion $i$ wins is $i+1-c$, and the probability
that opinion $i+1$ wins is $c-i$. With high probability, the winning opinion
cannot be other than $i$ or $i+1$.
To contrast this, we show that for a path and opinions $0,1,2$ arranged
initially in non-decreasing order along the path, the outcome is very
different. Any of the opinions can win with constant probability, provided that
each of the two extreme opinions $0$ and $2$ is initially supported by a
constant fraction of vertices.
|
[{'version': 'v1', 'created': 'Thu, 25 May 2023 01:08:21 GMT'}]
|
2023-05-26
|
[array(['Cooper', 'Colin', ''], dtype=object)
array(['Radzik', 'Tomasz', ''], dtype=object)
array(['Shiraga', 'Takeharu', ''], dtype=object)]
|
1,653 |
2110.01610
|
Natanael De Carvalho Costa
|
Levi O. de A. Azevedo, Orlando S. Ribeiro, Natanael C. Costa, Elis H.
C. P. Sinnecker, Miriam Gandelman
|
Revisitando o Experimento de Erat\'ostenes: medida do raio de Terra
|
The manuscript is written in the Portuguese language (5 pages, 4
Figs, 1 table)
| null | null | null |
physics.hist-ph physics.ed-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, we measure the volumetric mean radius of the Earth, reproducing
the historical experiment of Eratosthenes, carried out around 240 BC, in the
ancient cities of Siena and Alexandria. Here, we perform measurements in the
cities of Rio de Janeiro-RJ-Brazil and Teresina-PI-Brazil, whose longitude
coordinates are close. Using simple equipment, such as plumb lines and rulers,
we simultaneously measure the height of an object and its shadow's length at
midday, when the Sun is at its highest elevation, in order to obtain the shadow
angle. After determining the distance (latitude) between cities from satellite
data, we use the measured shadow angles to estimate the volume mean radius of
the Earth, from basic trigonometric arguments, finding a result whose error is
$0.5 \% $ with respect to the literature. Furthermore, from the difference of
time in which the Sun is at the highest point in the sky in each location, we
also estimate the Earth's angular velocity. In summary, we pedagogically
present how to obtain the mean curvature of the planet, assuming an
approximately spherical surface, in addition to its angular velocity.
|
[{'version': 'v1', 'created': 'Sat, 2 Oct 2021 18:35:13 GMT'}]
|
2021-10-06
|
[array(['Azevedo', 'Levi O. de A.', ''], dtype=object)
array(['Ribeiro', 'Orlando S.', ''], dtype=object)
array(['Costa', 'Natanael C.', ''], dtype=object)
array(['Sinnecker', 'Elis H. C. P.', ''], dtype=object)
array(['Gandelman', 'Miriam', ''], dtype=object)]
|
1,654 |
1510.03362
|
Alejandro Salinger
|
Jan Reineke and Alejandro Salinger
|
On the Smoothness of Paging Algorithms
|
Full version of paper presented at WAOA 2015
| null | null | null |
cs.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the smoothness of paging algorithms. How much can the number of page
faults increase due to a perturbation of the request sequence? We call a paging
algorithm smooth if the maximal increase in page faults is proportional to the
number of changes in the request sequence. We also introduce quantitative
smoothness notions that measure the smoothness of an algorithm. We derive lower
and upper bounds on the smoothness of deterministic and randomized
demand-paging and competitive algorithms. Among strongly-competitive
deterministic algorithms LRU matches the lower bound, while FIFO matches the
upper bound.
Well-known randomized algorithms like Partition, Equitable, or Mark are shown
not to be smooth. We introduce two new randomized algorithms, called
Smoothed-LRU and LRU-Random. Smoothed- LRU allows to sacrifice competitiveness
for smoothness, where the trade-off is controlled by a parameter. LRU-Random is
at least as competitive as any deterministic algorithm while smoother.
|
[{'version': 'v1', 'created': 'Mon, 12 Oct 2015 16:49:13 GMT'}]
|
2015-10-13
|
[array(['Reineke', 'Jan', ''], dtype=object)
array(['Salinger', 'Alejandro', ''], dtype=object)]
|
1,655 |
1702.01556
|
Andrew Swan
|
Andrew Swan
|
Some Brouwerian Counterexamples Regarding Nominal Sets in Constructive
Set Theory
| null | null | null | null |
math.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The existence of least finite support is used throughout the subject of
nominal sets. In this paper we give some Brouwerian counterexamples showing
that constructively, least finite support does not always exist and in fact can
be quite badly behaved. On this basis we reinforce the point that when working
constructively with nominal sets the use of least finite support should be
avoided. Moreover our examples suggest that this problem can't be fixed by
requiring nominal sets to have least finite support by definition or by using
the notion of subfinite instead of finite.
|
[{'version': 'v1', 'created': 'Mon, 6 Feb 2017 10:39:36 GMT'}]
|
2017-02-07
|
[array(['Swan', 'Andrew', ''], dtype=object)]
|
1,656 |
1506.02608
|
Berke Topacogullari
|
Berke Topacogullari
|
The Shifted Convolution of Divisor Functions
| null |
Q. J. Math. 67 (2016), no. 2, 331-363
|
10.1093/qmath/haw010
| null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove an asymptotic formula for the shifted convolution of the divisor
functions $d_3(n)$ and $d(n)$, which is uniform in the shift parameter and
which has a power-saving error term. The method is also applied to give
analogous estimates for the shifted convolution of $d_3(n)$ and Fourier
coefficents of holomorphic cusp forms. These asymptotics improve previous
results obtained by several different authors.
|
[{'version': 'v1', 'created': 'Mon, 8 Jun 2015 18:36:03 GMT'}]
|
2019-09-26
|
[array(['Topacogullari', 'Berke', ''], dtype=object)]
|
1,657 |
2202.01394
|
Reza Asgari
|
Sahar Izadi Vishkay, Reza Asgari
|
Magnetic domain wall dynamics under external electric field in bilayer
CrI$_3$
|
13 pages, 14 figures
|
Phys. Rev. B 105, 235424 (2022)
|
10.1103/PhysRevB.105.235424
| null |
cond-mat.mtrl-sci cond-mat.mes-hall
|
http://creativecommons.org/licenses/by/4.0/
|
Motivated by manipulating the magnetic order of bilayer CrI$_3$, we carry out
microscopic calculations to find the magnetic order and various magnetic
domains of the system in the presence of an electric field. Making use of
density functional simulations, a spin model Hamiltonian is introduced
consisting of isotropic exchange couplings, Dzyaloshinskii-Moriya (DM)
interaction, and on-site magnetic anisotropy. The spin dynamics of two
well-known states of bilayer CrI$_3$, low temperature (LT) and high temperature
(HT) phases, are obtained by solving the Landau-Lifshitz-Gilbert equation. We
show that the magnetic texture is stacking-dependent in bilayer CrI$_3$ and
stable magnetic domains can appear in the HT stack which are tunable by
external electric and magnetic fields. Therefore, we suggest that the HT phase
represents a promising candidate for data storage in the modern generation of
spintronic devices working on magnetic domain engineering.
|
[{'version': 'v1', 'created': 'Thu, 3 Feb 2022 03:49:27 GMT'}
{'version': 'v2', 'created': 'Thu, 16 Jun 2022 00:04:47 GMT'}]
|
2022-06-17
|
[array(['Vishkay', 'Sahar Izadi', ''], dtype=object)
array(['Asgari', 'Reza', ''], dtype=object)]
|
1,658 |
1304.0683
|
Vasily Ogryzko V
|
Michael Bordonaro, Vasily Ogryzko
|
Quantum Biology at the Cellular Level - elements of the research program
|
53 pages, 8 figures, with 3 open reviews
| null | null | null |
q-bio.OT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Quantum Biology is emerging as a new field at the intersection between
fundamental physics and biology, promising novel insights into the nature and
origin of biological order. We discuss several elements of QBCL (Quantum
Biology at Cellular Level), a research program designed to extend the reach of
quantum concepts to higher than molecular levels of biological organization.
Key words. decoherence, macroscopic superpositions, basis-dependence, formal
superposition, non-classical correlations, Basis-Dependent Selection (BDS),
synthetic biology, evolvability mechanism loophole.
|
[{'version': 'v1', 'created': 'Tue, 2 Apr 2013 16:38:18 GMT'}
{'version': 'v2', 'created': 'Wed, 3 Apr 2013 12:45:52 GMT'}]
|
2013-04-04
|
[array(['Bordonaro', 'Michael', ''], dtype=object)
array(['Ogryzko', 'Vasily', ''], dtype=object)]
|
1,659 |
2302.02588
|
Se-Ho Kim
|
Se-Ho Kim, Su-Hyun Yoo, Leonardo Shoji Aota, Ayman El-Zoka, Philwoong
Kang, Yonghyuk Lee, Baptiste Gault
|
B dopant evolution in Pd catalysts after H evolution/oxidation reaction
in alkaline environment
| null | null | null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Introduction of interstitial dopants has opened a new pathway to optimize
nanoparticle catalytic activity for, e.g., hydrogen evolution/oxidation and
other reactions. Here, we discuss the stability of a property-enhancing dopant,
B, introduced through controlled synthesis of an electrocatalyst Pd aerogel. We
observe significant removal of B after the hydrogen evolution/oxidation
reaction. Ab-initio calculations show that the high stability of sub-surface B
in Pd is substantially reduced when H is ad/absorbed on the surface, favoring
its departure from the host nanostructure. The destabilization of sub-surface B
is more pronounced as more H occupies surface sites and empty interstitial
sites. We hence demonstrate that the H2 fuel/product itself favors the
microstructural degradation of the electrocatalyst and an associated drop in
activity.
|
[{'version': 'v1', 'created': 'Mon, 6 Feb 2023 06:52:13 GMT'}]
|
2023-02-07
|
[array(['Kim', 'Se-Ho', ''], dtype=object)
array(['Yoo', 'Su-Hyun', ''], dtype=object)
array(['Aota', 'Leonardo Shoji', ''], dtype=object)
array(['El-Zoka', 'Ayman', ''], dtype=object)
array(['Kang', 'Philwoong', ''], dtype=object)
array(['Lee', 'Yonghyuk', ''], dtype=object)
array(['Gault', 'Baptiste', ''], dtype=object)]
|
1,660 |
1409.7262
|
Chaohong Lee
|
Yongguan Ke, Xizhou Qin, Honghua Zhong, Jiahao Huang, Chunshan He,
Chaohong Lee
|
Bloch-Landau-Zener dynamics in single-particle Wannier-Zeeman systems
|
13 pages, 10 figures, accepted for publication in Phys. Rev. A
|
Phys. Rev. A 91, 053409 (2015)
|
10.1103/PhysRevA.91.053409
| null |
cond-mat.quant-gas quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Stimulated by the experimental realization of spin-dependent tunneling via
gradient magnetic field [Phys. Rev. Lett. 111, 225301 (2013); Phys. Rev. Lett.
111, 185301 (2013)], we investigate dynamics of Bloch oscillations and
Landau-Zener tunneling of single spin-half particles in a periodic potential
under the influence of a spin-dependent constant force. In analogy to the
Wannier-Stark system, we call our system as the Wannier-Zeeman system. If there
is no coupling between the two spin states, the system can be described by two
crossing Wannier-Stark ladders with opposite tilts. The spatial crossing
between two Wannier-Stark ladders becomes a spatial anti-crossing if the two
spin states are coupled by external fields. For a wave-packet away from the
spatial anti-crossing, due to the spin-dependent constant force, it will
undergo spatial Landau-Zener transitions assisted by the intrinsic intra-band
Bloch oscillations, which we call the Bloch-Landau-Zener dynamics. If the
inter-spin coupling is sufficiently strong, the system undergoes adiabatic
Bloch-Landau-Zener dynamics, in which the spin dynamics follows the local
dressed states. Otherwise, for non-strong inter-spin couplings, the system
undergoes non-adiabatic Bloch-Landau-Zener dynamics.
|
[{'version': 'v1', 'created': 'Thu, 25 Sep 2014 14:12:06 GMT'}
{'version': 'v2', 'created': 'Thu, 20 Nov 2014 07:03:59 GMT'}
{'version': 'v3', 'created': 'Thu, 30 Apr 2015 12:12:17 GMT'}]
|
2015-05-20
|
[array(['Ke', 'Yongguan', ''], dtype=object)
array(['Qin', 'Xizhou', ''], dtype=object)
array(['Zhong', 'Honghua', ''], dtype=object)
array(['Huang', 'Jiahao', ''], dtype=object)
array(['He', 'Chunshan', ''], dtype=object)
array(['Lee', 'Chaohong', ''], dtype=object)]
|
1,661 |
0909.4347
|
Jayita RayMajumder
|
W.C. Stwalley, J. RayMajumder, M. Bellos, R. Carollo, M. Recore, M.
Mastroianni
|
Resonant Coupling in the Heteronuclear Alkali Dimers for Direct
Photoassociative Formation of X(0,0) Ultracold Molecules
|
20 pages, 12 figures, Submitted to Journal of Physical Chemistry A
| null |
10.1021/jp901803f
| null |
physics.atom-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Promising pathways for photoassociative formation of ultracold heteronuclear
alkali metal dimers in their lowest rovibronic levels (denoted X(0,0)) are
examined using high quality ab initio calculations of potential energy curves
currently available. A promising pathway for KRb, involving the resonant
coupling of the $2 ^1\Pi$ and $1 ^1\Pi $ states just below the lowest excited
asymptote (K($4s$)+Rb($5p_{1/2}$)), is found to occur also for RbCs and less
promisingly for KCs as well. The resonant coupling of the $3 ^1 \Sigma ^+ $ and
$1 ^1\Pi $ states, also just below the lowest excited asymptote, is found to be
promising for LiNa, LiK, LiRb, and less promising for LiCs and KCs. Direct
photoassociation to the $1 ^1\Pi $ state near dissociation appears promising in
the final dimers, NaK, NaRb, and NaCs, although detuning more than 100
cm$^{-1}$ below the lowest excited asymptote may be required.
|
[{'version': 'v1', 'created': 'Thu, 24 Sep 2009 02:01:44 GMT'}]
|
2016-09-28
|
[array(['Stwalley', 'W. C.', ''], dtype=object)
array(['RayMajumder', 'J.', ''], dtype=object)
array(['Bellos', 'M.', ''], dtype=object)
array(['Carollo', 'R.', ''], dtype=object)
array(['Recore', 'M.', ''], dtype=object)
array(['Mastroianni', 'M.', ''], dtype=object)]
|
1,662 |
cond-mat/0502054
|
Simeon Stoyanov D.
|
Simeon D. Stoyanov and Robert D. Groot
|
From Molecular Dynamics to hydrodynamics - a novel Galilean invariant
thermostat
| null | null |
10.1063/1.1870892
| null |
cond-mat.soft cond-mat.stat-mech
| null |
This article proposes a novel thermostat applicable to any particle-based
dynamic simulation. Each pair of particles is thermostated either (with
probability P) with a pairwise Lowe-Andersen thermostat, or (with probability
1-P) with a thermostat that is introduced here, which is based on a pairwise
interaction similar to the Nose-Hoover thermostat. When the pairwise
Nose-Hoover thermostat dominates (low P), the liquid has a high diffusion
coefficient and low viscosity, but when the Lowe-Andersen thermostat dominates,
the diffusion coefficient is low and viscosity is high. This novel
Nose-Hoover-Lowe-Andersen thermostat is Galilean invariant and preserves both
total linear and angular momentum of the system, due to the fact that the
thermostatic forces between each pair of the particles are pairwise additive
and central. We show by simulation that this thermostat also preserves
hydrodynamics. For the (non-interacting) ideal gas at P=0, the diffusion
coefficient diverges and viscosity is zero, while for P>0 it has a finite
value. By adjusting probability P, the Schmidt number can be varied by orders
of magnitude. The temperature deviation from the required value is at least an
order of magnitude smaller than in Dissipative Particle Dynamics (DPD), while
the equilibrium properties of the system are very well reproduced. Applications
of this thermostat include all standard molecular dynamic simulations of dense
liquids and solids with any type of force field, as well as hydrodynamic
simulation of multi-phase systems with largely different bulk viscosities,
including surface viscosity, and of dilute gases and plasmas.
|
[{'version': 'v1', 'created': 'Wed, 2 Feb 2005 15:57:10 GMT'}]
|
2009-11-11
|
[array(['Stoyanov', 'Simeon D.', ''], dtype=object)
array(['Groot', 'Robert D.', ''], dtype=object)]
|
1,663 |
physics/0510268
|
Josh Dunn
|
Josh W. Dunn and Chris H. Greene
|
Predictions of laser-cooling temperatures for multilevel atoms in
three-dimensional polarization-gradient fields
|
21 pages, 4 figures, LaTeX; minor revisions, shortened appendix
| null |
10.1103/PhysRevA.73.033421
| null |
physics.atom-ph
| null |
We analyze the dynamics of atom-laser interactions for atoms having multiple,
closely spaced, excited-state hyperfine manifolds. The system is treated fully
quantum mechanically, including the atom's center-of-mass degree of freedom,
and motion is described in a polarization gradient field created by a
three-dimensional laser configuration. We develop the master equation
describing this system, and then specialize it to the low-intensity limit by
adiabatically eliminating the excited states. We show how this master equation
can be simulated using the Monte Carlo wave function technique, and we provide
details on implementation of this procedure. Monte Carlo calculations of steady
state atomic momentum distributions for two fermionic alkaline earth isotopes,
$^{25}$Mg and $^{87}$Sr, interacting with a three-dimensional lin-$\perp$-lin
laser configuration are presented, providing estimates of experimentally
achievable laser-cooling temperatures.
|
[{'version': 'v1', 'created': 'Sun, 30 Oct 2005 23:36:50 GMT'}
{'version': 'v2', 'created': 'Tue, 14 Feb 2006 20:15:46 GMT'}]
|
2009-11-11
|
[array(['Dunn', 'Josh W.', ''], dtype=object)
array(['Greene', 'Chris H.', ''], dtype=object)]
|
1,664 |
2012.04183
|
Tongxin Zhang
|
Tongxin Zhang, Lilin Wang, Zhijun Wang, Junjie Li, Jincheng Wang
|
Single ice crystal growth with controlled orientation during directional
freezing
| null | null | null | null |
cond-mat.mtrl-sci cond-mat.soft
|
http://creativecommons.org/licenses/by/4.0/
|
Ice growth has attracted great attention for its capability of fabricating
hierarchically porous microstructure. However, the formation of tilted lamellar
microstructure during freezing needs to be reconsidered due to the limited
control of ice orientation with respect to thermal gradient during in-situ
observations, which can greatly enrich our insight into architectural control
of porous biomaterials. This paper provides an in-situ study of solid/liquid
interface morphology evolution of directionally solidified single crystal ice
with its C-axis (optical axis) perpendicular to directions of both thermal
gradient and incident light in poly (vinyl alcohol, PVA) solutions. Misty
morphology and V-shaped lamellar morphology were clearly observed in-situ for
the first time. Quantitative characterizations on lamellar spacing, tilt angle
and tip undercooling of lamellar ice platelets provide a clearer insight into
the inherent ice growth habit in polymeric aqueous systems and are suggested
exert significant impact on future design and optimization in porous
biomaterials.
|
[{'version': 'v1', 'created': 'Tue, 8 Dec 2020 02:59:17 GMT'}]
|
2020-12-09
|
[array(['Zhang', 'Tongxin', ''], dtype=object)
array(['Wang', 'Lilin', ''], dtype=object)
array(['Wang', 'Zhijun', ''], dtype=object)
array(['Li', 'Junjie', ''], dtype=object)
array(['Wang', 'Jincheng', ''], dtype=object)]
|
1,665 |
1202.3728
|
Hannaneh Hajishirzi
|
Hannaneh Hajishirzi, Julia Hockenmaier, Erik T. Mueller, Eyal Amir
|
Reasoning about RoboCup Soccer Narratives
| null | null | null |
UAI-P-2011-PG-291-300
|
cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper presents an approach for learning to translate simple narratives,
i.e., texts (sequences of sentences) describing dynamic systems, into coherent
sequences of events without the need for labeled training data. Our approach
incorporates domain knowledge in the form of preconditions and effects of
events, and we show that it outperforms state-of-the-art supervised learning
systems on the task of reconstructing RoboCup soccer games from their
commentaries.
|
[{'version': 'v1', 'created': 'Tue, 14 Feb 2012 16:41:17 GMT'}]
|
2012-02-20
|
[array(['Hajishirzi', 'Hannaneh', ''], dtype=object)
array(['Hockenmaier', 'Julia', ''], dtype=object)
array(['Mueller', 'Erik T.', ''], dtype=object)
array(['Amir', 'Eyal', ''], dtype=object)]
|
1,666 |
2008.00780
|
Denis Lebedev
|
Denis Lebedev, Kostas Margellos, Paul Goulart
|
Approximate Dynamic Programming for Delivery Time Slot Pricing: a
Sensitivity Analysis
|
13 pages, 7 figures
| null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the revenue management problem of finding profit-maximising
prices for delivery time slots in the context of attended home delivery. This
multi-stage optimal control problem admits a dynamic programming formulation
that is intractable for realistic problem sizes due to the so-called "curse of
dimensionality". Therefore, we study three approximate dynamic programming
algorithms both from a control-theoretical perspective and in a parametric
numerical case study. Our numerical analysis is based on real-world data, from
which we generate multiple scenarios to stress-test the robustness of the
pricing policies to errors in model parameter estimates. Our theoretical
analysis and numerical benchmark tests show that one of these algorithms,
namely gradient-bounded dynamic programming, dominates the others with respect
to computation time and profit-generation capabilities of the delivery slot
pricing policies that it generates. Finally, we show that uncertainty in the
estimates of the model parameters further increases the profit-generation
dominance of this approach.
|
[{'version': 'v1', 'created': 'Mon, 3 Aug 2020 11:09:55 GMT'}]
|
2020-08-04
|
[array(['Lebedev', 'Denis', ''], dtype=object)
array(['Margellos', 'Kostas', ''], dtype=object)
array(['Goulart', 'Paul', ''], dtype=object)]
|
1,667 |
1904.13265
|
Chi-Ting Chiang
|
Guangyu Zhang, Chi-Ting Chiang, Chris Sheehy, An\v{z}e Slosar, Jian
Wang
|
Predicting CMB dust foreground using galactic 21 cm data
|
16 pages, 7 figures; matches JCAP accepted version
| null |
10.1088/1475-7516/2019/12/022
| null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Understanding large-angular-scale galactic foregrounds is crucial for future
CMB experiments aiming to detect $B$-mode polarization from primordial
gravitational waves. Traditionally, the dust component has been separated using
its different frequency dependence. However, using non-CMB observations has
potential to increase fidelity and decrease the reconstruction noise. In this
exploratory paper we investigate the capability of galactic 21 cm observations
to predict the dust foreground in intensity. We train a neural network to
predict the dust foreground as measured by the Planck Satellite from the full
velocity data-cube of galactic 21 cm emission as measured by the HI4PI survey.
We demonstrate that information in the velocity structure clearly improves the
predictive power over both a simple integrated emission model and a simple
linear model. The improvement is significant at arc-minute scales but more
modest at degree scales. This proof of principle on temperature data indicates
that it might also be possible to improve foreground polarization templates
from the same input data.
|
[{'version': 'v1', 'created': 'Tue, 30 Apr 2019 14:09:44 GMT'}
{'version': 'v2', 'created': 'Mon, 18 Nov 2019 12:10:20 GMT'}]
|
2019-12-18
|
[array(['Zhang', 'Guangyu', ''], dtype=object)
array(['Chiang', 'Chi-Ting', ''], dtype=object)
array(['Sheehy', 'Chris', ''], dtype=object)
array(['Slosar', 'Anže', ''], dtype=object)
array(['Wang', 'Jian', ''], dtype=object)]
|
1,668 |
2106.12047
|
Benjamin Sch\"afer
|
Benjamin Sch\"afer, Catherine M. Heppell, Hefin Rhys, Christian Beck
|
Fluctuations of water quality time series in rivers follow
superstatistics
| null | null | null | null |
physics.ao-ph physics.bio-ph physics.data-an stat.AP
|
http://creativecommons.org/licenses/by/4.0/
|
Superstatistics is a general method from nonequilibrium statistical physics
which has been applied to a variety of complex systems, ranging from
hydrodynamic turbulence to traffic delays and air pollution dynamics. Here, we
investigate water quality time series (such as dissolved oxygen concentrations
and electrical conductivity) as measured in rivers, and provide evidence that
they exhibit superstatistical behaviour. Our main example are time series as
recorded in the river Chess in South East England. Specifically, we use
seasonal detrending and empirical mode decomposition (EMD) to separate trends
from fluctuations for the measured data. With either detrending method, we
observe heavy-tailed fluctuation distributions, which are well described by a
log-normal superstatistics for dissolved oxygen. Contrarily, we find a double
peaked non-standard superstatistics for the electrical conductivity data, which
we model using two combined $\chi^2$-distributions.
|
[{'version': 'v1', 'created': 'Tue, 15 Jun 2021 14:06:54 GMT'}]
|
2021-06-24
|
[array(['Schäfer', 'Benjamin', ''], dtype=object)
array(['Heppell', 'Catherine M.', ''], dtype=object)
array(['Rhys', 'Hefin', ''], dtype=object)
array(['Beck', 'Christian', ''], dtype=object)]
|
1,669 |
2101.05855
|
Akanksha Atrey
|
Akanksha Atrey, Prashant Shenoy, David Jensen
|
Preserving Privacy in Personalized Models for Distributed Mobile
Services
|
Published at ICDCS 2021
| null | null | null |
cs.DC cs.LG
|
http://creativecommons.org/licenses/by/4.0/
|
The ubiquity of mobile devices has led to the proliferation of mobile
services that provide personalized and context-aware content to their users.
Modern mobile services are distributed between end-devices, such as
smartphones, and remote servers that reside in the cloud. Such services thrive
on their ability to predict future contexts to pre-fetch content or make
context-specific recommendations. An increasingly common method to predict
future contexts, such as location, is via machine learning (ML) models. Recent
work in context prediction has focused on ML model personalization where a
personalized model is learned for each individual user in order to tailor
predictions or recommendations to a user's mobile behavior. While the use of
personalized models increases efficacy of the mobile service, we argue that it
increases privacy risk since a personalized model encodes contextual behavior
unique to each user. To demonstrate these privacy risks, we present several
attribute inference-based privacy attacks and show that such attacks can leak
privacy with up to 78% efficacy for top-3 predictions. We present Pelican, a
privacy-preserving personalization system for context-aware mobile services
that leverages both device and cloud resources to personalize ML models while
minimizing the risk of privacy leakage for users. We evaluate Pelican using
real world traces for location-aware mobile services and show that Pelican can
substantially reduce privacy leakage by up to 75%.
|
[{'version': 'v1', 'created': 'Thu, 14 Jan 2021 20:26:54 GMT'}
{'version': 'v2', 'created': 'Wed, 21 Apr 2021 23:18:05 GMT'}]
|
2021-04-23
|
[array(['Atrey', 'Akanksha', ''], dtype=object)
array(['Shenoy', 'Prashant', ''], dtype=object)
array(['Jensen', 'David', ''], dtype=object)]
|
1,670 |
math/0605039
|
Justin Smith
|
J. Smith
|
The Asymptotic Dimension of the First Grigorchuk Group is Infinity
|
3 pages
| null | null | null |
math.GR math.MG
| null |
We prove that the asymptotic dimension of the first Grigorchuk group is
infinity.
|
[{'version': 'v1', 'created': 'Mon, 1 May 2006 20:35:54 GMT'}]
|
2007-05-23
|
[array(['Smith', 'J.', ''], dtype=object)]
|
1,671 |
cond-mat/0603657
|
Guilhem Semerjian
|
Enzo Marinari and Guilhem Semerjian
|
On the number of circuits in random graphs
|
30 pages
|
J. Stat. Mech. P06019 (2006).
|
10.1088/1742-5468/2006/06/P06019
| null |
cond-mat.stat-mech cond-mat.dis-nn math.CO math.PR
| null |
We apply in this article (non rigorous) statistical mechanics methods to the
problem of counting long circuits in graphs. The outcomes of this approach have
two complementary flavours. On the algorithmic side, we propose an approximate
counting procedure, valid in principle for a large class of graphs. On a more
theoretical side, we study the typical number of long circuits in random graph
ensembles, reproducing rigorously known results and stating new conjectures.
|
[{'version': 'v1', 'created': 'Fri, 24 Mar 2006 14:45:30 GMT'}]
|
2009-11-11
|
[array(['Marinari', 'Enzo', ''], dtype=object)
array(['Semerjian', 'Guilhem', ''], dtype=object)]
|
1,672 |
0807.3702
|
Linyuan Lu
|
Jerrold R. Griggs and Linyuan Lu
|
On families of subsets with a forbidden subposet
|
19 pages, submitted to CPC
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Let $\F\subset 2^{[n]}$ be a family of subsets of $\{1,2,..., n\}$. For any
poset $H$, we say $\F$ is $H$-free if $\F$ does not contain any subposet
isomorphic to $H$. Katona and others have investigated the behavior of
$\La(n,H)$, which denotes the maximum size of $H$-free families $\F\subset
2^{[n]}$. Here we use a new approach, which is to apply methods from extremal
graph theory and probability theory to identify new classes of posets $H$, for
which $\La(n,H)$ can be determined asymptotically as $n\to\infty$ for various
posets $H$, including two-end-forks, up-down trees, and cycles $C_{4k}$ on two
levels.
|
[{'version': 'v1', 'created': 'Wed, 23 Jul 2008 15:41:35 GMT'}]
|
2008-07-24
|
[array(['Griggs', 'Jerrold R.', ''], dtype=object)
array(['Lu', 'Linyuan', ''], dtype=object)]
|
1,673 |
1604.06285
|
Longyue Wang
|
Longyue Wang, Zhaopeng Tu, Xiaojun Zhang, Hang Li, Andy Way, Qun Liu
|
A Novel Approach to Dropped Pronoun Translation
|
To appear in NAACL2016
| null | null | null |
cs.CL
|
http://creativecommons.org/publicdomain/zero/1.0/
|
Dropped Pronouns (DP) in which pronouns are frequently dropped in the source
language but should be retained in the target language are challenge in machine
translation. In response to this problem, we propose a semi-supervised approach
to recall possibly missing pronouns in the translation. Firstly, we build
training data for DP generation in which the DPs are automatically labelled
according to the alignment information from a parallel corpus. Secondly, we
build a deep learning-based DP generator for input sentences in decoding when
no corresponding references exist. More specifically, the generation is
two-phase: (1) DP position detection, which is modeled as a sequential
labelling task with recurrent neural networks; and (2) DP prediction, which
employs a multilayer perceptron with rich features. Finally, we integrate the
above outputs into our translation system to recall missing pronouns by both
extracting rules from the DP-labelled training data and translating the
DP-generated input sentences. Experimental results show that our approach
achieves a significant improvement of 1.58 BLEU points in translation
performance with 66% F-score for DP generation accuracy.
|
[{'version': 'v1', 'created': 'Thu, 21 Apr 2016 12:55:29 GMT'}]
|
2016-04-22
|
[array(['Wang', 'Longyue', ''], dtype=object)
array(['Tu', 'Zhaopeng', ''], dtype=object)
array(['Zhang', 'Xiaojun', ''], dtype=object)
array(['Li', 'Hang', ''], dtype=object)
array(['Way', 'Andy', ''], dtype=object)
array(['Liu', 'Qun', ''], dtype=object)]
|
1,674 |
2204.04609
|
Anzhelika Koldaeva
|
Paula Villa Martin, Anzhelika Koldaeva and Simone Pigolotti
|
Coalescent dynamics of planktonic communities
| null | null | null | null |
q-bio.PE
|
http://creativecommons.org/licenses/by/4.0/
|
Planktonic communities are extremely diverse and include a vast number of
rare species. The dynamics of these rare species is best described by
individual-based models. However, individual-based approaches to planktonic
diversity face substantial difficulties, due to the large number of individuals
required to make realistic predictions. In this paper, we study diversity of
planktonic communities by means of a spatial coalescence model, that
incorporates transport by oceanic currents. As a main advantage, our approach
requires simulating a number of individuals equal to the size of the sample one
is interested in, rather than the size of the entire community. By theoretical
analysis and simulations, we explore the conditions upon which our coalescence
model is equivalent to individual-based dynamics. As an application, we use our
model to predict the impact of chaotic advection by oceanic currents on
biodiversity. We conclude that the coalescent approach permits to simulate
marine microbial communities much more efficiently than with individual-based
models.
|
[{'version': 'v1', 'created': 'Sun, 10 Apr 2022 05:40:20 GMT'}]
|
2022-04-12
|
[array(['Martin', 'Paula Villa', ''], dtype=object)
array(['Koldaeva', 'Anzhelika', ''], dtype=object)
array(['Pigolotti', 'Simone', ''], dtype=object)]
|
1,675 |
quant-ph/0105026
|
Kim Bostroem
|
Kim Bostroem and Timo Felbinger
|
Lossless quantum data compression and variable-length coding
|
16 pages, 5 figures
|
Phys. Rev. A 65, 032313 (2002)
|
10.1103/PhysRevA.65.032313
| null |
quant-ph
| null |
In order to compress quantum messages without loss of information it is
necessary to allow the length of the encoded messages to vary. We develop a
general framework for variable-length quantum messages in close analogy to the
classical case and show that lossless compression is only possible if the
message to be compressed is known to the sender. The lossless compression of an
ensemble of messages is bounded from below by its von-Neumann entropy. We show
that it is possible to reduce the number of qbits passing through a quantum
channel even below the von-Neumann entropy by adding a classical side-channel.
We give an explicit communication protocol that realizes lossless and
instantaneous quantum data compression and apply it to a simple example. This
protocol can be used for both online quantum communication and storage of
quantum data.
|
[{'version': 'v1', 'created': 'Tue, 8 May 2001 13:18:35 GMT'}
{'version': 'v2', 'created': 'Fri, 1 Mar 2002 10:37:53 GMT'}]
|
2009-11-07
|
[array(['Bostroem', 'Kim', ''], dtype=object)
array(['Felbinger', 'Timo', ''], dtype=object)]
|
1,676 |
1510.04114
|
Mackenzie Simper
|
Tom Alberts, Ga Yeong Lee, Mackenzie Simper
|
Bak-Sneppen Backwards
|
14 pages
| null |
10.1080/17442508.2017.1282957
| null |
math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the backwards Markov chain for the Bak-Sneppen model of biological
evolution and derive its corresponding reversibility equations. We show that,
in contrast to the forwards Markov chain, the dynamics of the backwards chain
explicitly involve the stationary distribution of the model, and from this we
derive a functional equation that the stationary distribution must satisfy. We
use this functional equation to derive differential equations for the
stationary distribution of Bak-Sneppen models in which all but one or all but
two of the fitnesses are replaced at each step. This gives a unified way of
deriving Schlemm's expressions for the stationary distributions of the
isotropic four-species model, the isotropic five-species model, and the
anisotropic three-species model.
|
[{'version': 'v1', 'created': 'Wed, 14 Oct 2015 14:29:41 GMT'}]
|
2020-10-02
|
[array(['Alberts', 'Tom', ''], dtype=object)
array(['Lee', 'Ga Yeong', ''], dtype=object)
array(['Simper', 'Mackenzie', ''], dtype=object)]
|
1,677 |
1205.4225
|
Gia-Wei Chern
|
Eunsong Choi, Gia-Wei Chern, Natalia B. Perkins
|
Helimagnons in a chiral ground state of the pyrochlore antiferromagnets
|
5 pages, 3 figures
|
Europhys. Lett. 101, 37004 (2013)
|
10.1209/0295-5075/101/37004
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Goldstone mode in a helical magnetic phase, also known as the helimagnon,
is a propagating mode with a highly anisotropic dispersion relation. Here we
study theoretically the helimagnon excitations in a complex chiral ground state
of pyrochlore antiferromagnets such as spinel CdCr2O4 and itinerant magnet
YMn2. We show that the effective theory of the soft modes in the helical state
possesses a symmetry similar to that of smectic liquid crystals. We compute the
low-energy spin-wave spectrum based on a microscopic spin Hamiltonian and find
a dispersion relation characteristic of the helimagnons. By performing dynamics
simulations with realistic model parameters, we also obtain an overall
agreement between experiment and the numerical spin-wave spectrum. Our work
thus also clarifies the mechanisms that relive the magnetic frustration in
these compounds.
|
[{'version': 'v1', 'created': 'Fri, 18 May 2012 19:34:47 GMT'}
{'version': 'v2', 'created': 'Fri, 25 Jan 2013 07:08:16 GMT'}]
|
2013-02-19
|
[array(['Choi', 'Eunsong', ''], dtype=object)
array(['Chern', 'Gia-Wei', ''], dtype=object)
array(['Perkins', 'Natalia B.', ''], dtype=object)]
|
1,678 |
1101.4780
|
Gaetano Annunziata
|
Gaetano Annunziata, Mario Cuoco, Paola Gentile, Alfonso Romano, Canio
Noce
|
Does a ferromagnet with spin-dependent masses produce a spin-filtering
effect in a ferromagnetic/insulator/superconductor junction?
|
7 pages, 5 figures
|
Supercond. Sci. Technol. 24, 024021 (2011)
|
10.1088/0953-2048/24/2/024021
| null |
cond-mat.supr-con
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analyze charge transport through a ballistic
ferromagnet/insulator/superconductor junction by means of the Bogoliubov-de
Gennes equations. We take into account the possibility that ferromagnetism in
the first electrode may be driven by a mass renormalization of oppositely
polarized carriers, i.e. by a spin bandwidth asymmetry, rather than by a rigid
splitting of up-and down-spin electron bands as in a standard Stoner
ferromagnet. By evaluating the averaged charge conductance for both an s- and a
$d_{x^2-y^2}$-wave order parameter for the S side, we show that the mass
mismatch in the ferromagnetic electrode may mimic a spin active barrier.
Indeed, in the $s$-wave case we show that under suitable conditions the spin
dependent conductance of minority carriers below the energy gap $\Delta_0$ can
be larger than for majority carriers, and lower above $\Delta_0$. On the other
hand, for a d_{x^2-y^2}-wave superconductor similar spin-dependent effects give
rise to an asymmetric peak splitting in the conductance. These results suggest
that the junction may work as a spin-filtering device.
|
[{'version': 'v1', 'created': 'Tue, 25 Jan 2011 11:43:17 GMT'}]
|
2015-05-27
|
[array(['Annunziata', 'Gaetano', ''], dtype=object)
array(['Cuoco', 'Mario', ''], dtype=object)
array(['Gentile', 'Paola', ''], dtype=object)
array(['Romano', 'Alfonso', ''], dtype=object)
array(['Noce', 'Canio', ''], dtype=object)]
|
1,679 |
1402.6920
|
Edinah Gnang k
|
Edinah K. Gnang
|
Computational Aspects of the Combinatorial Nullstellensatz Method
| null | null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss here some computational aspects of the Combinatorial
Nullstellensatz argument. Our main result shows that the order of magnitude of
the symmetry group associated with permutations of the variables in algebraic
constraints, determines the performance of algorithms naturally deduced from
Alon's Combinatorial Nullstellensatz arguments. Finally we present a
primal-dual polynomial constructions for certifying the existence or the
non-existence of solutions to combinatorial problems.
|
[{'version': 'v1', 'created': 'Thu, 27 Feb 2014 14:30:03 GMT'}]
|
2014-02-28
|
[array(['Gnang', 'Edinah K.', ''], dtype=object)]
|
1,680 |
2207.10574
|
Cigdem Beyan
|
Cigdem Beyan and Alessandro Vinciarelli and Alessio Del Bue
|
Face-to-Face Co-Located Human-Human Social Interaction Analysis using
Nonverbal Cues: A Survey
|
Submitted to ACM Computing and Surveys
| null | null | null |
cs.HC cs.AI cs.CV cs.LG cs.MM
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
This work presents a systematic review of recent efforts (since 2010) aimed
at automatic analysis of nonverbal cues displayed in face-to-face co-located
human-human social interactions. The main reason for focusing on nonverbal cues
is that these are the physical, machine detectable traces of social and
psychological phenomena. Therefore, detecting and understanding nonverbal cues
means, at least to a certain extent, to detect and understand social and
psychological phenomena. The covered topics are categorized into three as: a)
modeling social traits, such as leadership, dominance, personality traits, b)
social role recognition and social relations detection and c) interaction
dynamics analysis in terms of group cohesion, empathy, rapport and so forth. We
target the co-located interactions, in which the interactants are always
humans. The survey covers a wide spectrum of settings and scenarios, including
free-standing interactions, meetings, indoor and outdoor social exchanges,
dyadic conversations, and crowd dynamics. For each of them, the survey
considers the three main elements of nonverbal cues analysis, namely data,
sensing approaches and computational methodologies. The goal is to highlight
the main advances of the last decade, to point out existing limitations, and to
outline future directions.
|
[{'version': 'v1', 'created': 'Wed, 20 Jul 2022 13:37:57 GMT'}]
|
2022-07-22
|
[array(['Beyan', 'Cigdem', ''], dtype=object)
array(['Vinciarelli', 'Alessandro', ''], dtype=object)
array(['Del Bue', 'Alessio', ''], dtype=object)]
|
1,681 |
cond-mat/0404672
|
Stefania de Palo
|
S. De Palo, M. L. Chiofalo, M. J. Holland, S. J. J. M. F. Kokkelmans
|
Resonance effects on the crossover of bosonic to fermionic superfluidity
|
8 pages,7 figures
| null |
10.1016/j.physleta.2004.05.034
| null |
cond-mat.supr-con
| null |
Feshbach scattering resonances are being utilized in atomic gases to explore
the entire crossover region from a Bose-Einstein Condensation (BEC) of
composite bosons to a Bardeen-Cooper-Schrieffer (BCS) of Cooper pairs. Several
theoretical descriptions of the crossover have been developed based on an
assumption that the fermionic interactions are dependent only on the value of a
single microscopic parameter, the scattering length for the interaction of
fermion particles. Such a picture is not universal, however, and is only
applicable to describe a system with an energetically broad Feshbach resonance.
In the more general case in which narrow Feshbach resonances are included in
the discussion, one must consider how the energy dependence of the scattering
phase shift affects the physical properties of the system. We develop a
theoretical framework which allows for a tuning of the scattering phase shift
and its energy dependence, whose parameters can be fixed from realistic
scattering solutions of the atomic physics. We show that BCS-like nonlocal
solutions may build up in conditions of resonance scattering, depending on the
effective range of the interactions.
|
[{'version': 'v1', 'created': 'Wed, 28 Apr 2004 09:33:41 GMT'}]
|
2009-11-10
|
[array(['De Palo', 'S.', ''], dtype=object)
array(['Chiofalo', 'M. L.', ''], dtype=object)
array(['Holland', 'M. J.', ''], dtype=object)
array(['Kokkelmans', 'S. J. J. M. F.', ''], dtype=object)]
|
1,682 |
1601.00322
|
Zouhair Mouayn
|
Khalid Ahbli, Patrick Kayupe Kikodio and Zouhair Mouayn
|
Orthogonal polynomials attached to coherent states for the symmetric
Poschl-Teller oscillator
|
19 pages, 3 figures
| null | null | null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a one-parameter family of nonlinear coherent states by replacing
the factorial in coefficients of the canonical coherent states by a specific
generalized factorial depending on a parameter gamma. These states are
superposition of eigenstates of the Hamiltonian with a symmetric Poschl-Teller
potential depending on a parameter nu > 1. The associated Bargmann-type
transform is defined for equal parameters. Some results on the infinite square
well potential are also derived. For some different values of gamma, we discuss
two sets of orthogonal polynomials that are naturally attached to these
coherent states.
|
[{'version': 'v1', 'created': 'Sun, 3 Jan 2016 18:50:49 GMT'}]
|
2016-01-05
|
[array(['Ahbli', 'Khalid', ''], dtype=object)
array(['Kikodio', 'Patrick Kayupe', ''], dtype=object)
array(['Mouayn', 'Zouhair', ''], dtype=object)]
|
1,683 |
2106.04762
|
Qingshuo Song
|
Jiamin Jian, Peiyao Lai, Qingshuo Song, Jiaxuan Ye
|
The convergence rate of the equilibrium measure for the LQG Mean Field
Game with a Common Noise
|
30 pages, 9 figures
| null | null | null |
math.OC math.PR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The convergence rate of equilibrium measures of N-player Games with Brownian
common noise to its asymptotic Mean Field Game system is known as 1/9 with
respect to 1-Wasserstein distance, obtained by the monograph [Cardaliaguet,
Delarue, Lasry, Lions (2019)]. In this work, we study the convergence rate of
the N-player LQG game with a Markov chain common noise towards its asymptotic
Mean Field Game. The approach relies on an explicit coupling of the optimal
trajectory of the N-player game driven by N-dimensional Brownian motion and
Mean Field Game counterpart driven by one-dimensional Brownian motion. As a
result, the convergence rate is 1/2 with respect to the 2-Wasserstein distance.
|
[{'version': 'v1', 'created': 'Wed, 9 Jun 2021 01:32:23 GMT'}
{'version': 'v2', 'created': 'Mon, 6 Dec 2021 12:56:34 GMT'}
{'version': 'v3', 'created': 'Fri, 15 Jul 2022 15:51:10 GMT'}]
|
2022-07-18
|
[array(['Jian', 'Jiamin', ''], dtype=object)
array(['Lai', 'Peiyao', ''], dtype=object)
array(['Song', 'Qingshuo', ''], dtype=object)
array(['Ye', 'Jiaxuan', ''], dtype=object)]
|
1,684 |
2111.08694
|
Ludwig Hothorn
|
Ludwig A. Hothorn
|
Simultaneous inference of correlated marginal tests using
intersection-union or union-intersection test principle
|
3 Fugures, 5 Tables
| null | null | null |
stat.ME
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Two main approaches in simultaneous inference are intersection-union tests
and union-intersection tests. For intersection-union hypotheses, the classical
IUT based on marginal p-values and the all-in-alternative UIT are compared.
Depending on correlation, number of marginal tests and patterns of the
alternative the inherent power loss of the aiaUIT seems to be acceptable,
considering its advantage, namely the availability of simple-to-interpret
simultaneous confidence interval.
|
[{'version': 'v1', 'created': 'Mon, 15 Nov 2021 10:57:03 GMT'}]
|
2021-11-17
|
[array(['Hothorn', 'Ludwig A.', ''], dtype=object)]
|
1,685 |
2002.11748
|
Massimo Frittelli
|
Massimo Frittelli, Anotida Madzvamuse, Ivonne Sgura
|
Bulk-surface virtual element method for systems of PDEs in two-space
dimension
|
39 pages, 9 figures, 5 tables
|
Numerische Mathematik 147 (2021) 305-348
|
10.1007/s00211-020-01167-3
| null |
math.NA cs.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we consider a coupled bulk-surface PDE in two space dimensions.
The model consists of a PDE in the bulk that is coupled to another PDE on the
surface through general nonlinear boundary conditions. For such a system we
propose a novel method, based on coupling a virtual element method [Beir\~ao da
Veiga et al., 2013] in the bulk domain to a surface finite element method
[Dziuk & Elliott, 2013] on the surface. The proposed method, which we coin the
Bulk-Surface Virtual Element Method (BSVEM) includes, as a special case, the
bulk-surface finite element method (BSFEM) on triangular meshes [Madzvamuse &
Chung, 2016]. The method exhibits second-order convergence in space, provided
the exact solution is $H^{2+1/4}$ in the bulk and $H^2$ on the surface, where
the additional $\frac{1}{4}$ is required only in the simultaneous presence of
surface curvature and non-triangular elements. Two novel techniques introduced
in our analysis are (i) an $L^2$-preserving inverse trace operator for the
analysis of boundary conditions and (ii) the Sobolev extension as a replacement
of the lifting operator [Elliott & Ranner, 2013] for sufficiently smooth exact
solutions. The generality of the polygonal mesh can be exploited to optimize
the computational time of matrix assembly. The method takes an optimised
matrix-vector form that also simplifies the known special case of BSFEM on
triangular meshes [Madzvamuse & Chung, 2016]. Three numerical examples
illustrate our findings.
|
[{'version': 'v1', 'created': 'Wed, 26 Feb 2020 19:09:07 GMT'}
{'version': 'v2', 'created': 'Mon, 24 Aug 2020 18:19:47 GMT'}
{'version': 'v3', 'created': 'Sun, 31 Jan 2021 17:12:30 GMT'}]
|
2022-11-07
|
[array(['Frittelli', 'Massimo', ''], dtype=object)
array(['Madzvamuse', 'Anotida', ''], dtype=object)
array(['Sgura', 'Ivonne', ''], dtype=object)]
|
1,686 |
2106.14982
|
Giacomo Cacciapaglia
|
Giacomo Cacciapaglia, Corentin Cot, Adele de Hoffer, Stefan
Hohenegger, Francesco Sannino and Shahram Vatani
|
Epidemiological theory of virus variants
|
38 pages, 32 figures
| null |
10.1016/j.physa.2022.127071
|
LYCEN 2021-01
|
q-bio.PE physics.soc-ph
|
http://creativecommons.org/licenses/by/4.0/
|
We propose a physical theory underlying the temporal evolution of competing
virus variants that relies on the existence of (quasi) fixed points capturing
the large time scale invariance of the dynamics. To motivate our result we
first modify the time-honoured compartmental models of the SIR type to account
for the existence of competing variants and then show how their evolution can
be naturally re-phrased in terms of flow equations ending at quasi fixed
points. As the natural next step we employ (near) scale invariance to organise
the time evolution of the competing variants within the effective description
of the epidemic Renormalization Group framework. We test the resulting theory
against the time evolution of COVID-19 virus variants that validate the theory
empirically.
|
[{'version': 'v1', 'created': 'Mon, 28 Jun 2021 20:57:58 GMT'}]
|
2022-03-23
|
[array(['Cacciapaglia', 'Giacomo', ''], dtype=object)
array(['Cot', 'Corentin', ''], dtype=object)
array(['de Hoffer', 'Adele', ''], dtype=object)
array(['Hohenegger', 'Stefan', ''], dtype=object)
array(['Sannino', 'Francesco', ''], dtype=object)
array(['Vatani', 'Shahram', ''], dtype=object)]
|
1,687 |
2207.00349
|
Marco Dinarelli
|
Marco Naguib and Fran\c{c}ois Portet and Marco Dinarelli
|
Vers la compr\'ehension automatique de la parole bout-en-bout \`a
moindre effort
|
Language: French; Paper accepted for publication at the French
Conference TALN 2022; preliminary work for the Interspeech 2022 paper (coming
soon)
| null | null | null |
cs.CL cs.AI
|
http://creativecommons.org/licenses/by-sa/4.0/
|
Recent advances in spoken language understanding benefited from
Self-Supervised models trained on large speech corpora. For French, the
LeBenchmark project has made such models available and has led to impressive
progress on several tasks including spoken language understanding. These
advances have a non-negligible cost in terms of computation time and energy
consumption. In this paper, we compare several learning strategies aiming at
reducing such cost while keeping competitive performances. The experiments are
performed on the MEDIA corpus, and show that it is possible to reduce the
learning cost while maintaining state-of-the-art performances.
|
[{'version': 'v1', 'created': 'Fri, 1 Jul 2022 11:29:59 GMT'}]
|
2022-07-04
|
[array(['Naguib', 'Marco', ''], dtype=object)
array(['Portet', 'François', ''], dtype=object)
array(['Dinarelli', 'Marco', ''], dtype=object)]
|
1,688 |
1902.04137
|
Juan J Vilatela
|
A. Moya, N. Kemnade, M. R. Osorio, A. Cherevan, D. Granados, D. Eder,
J.J. Vilatela
|
Large area photoelectrodes based on hybrids of CNT fibres and ALD grown
TiO2
| null |
Journal of Materials Chemistry A; 2017,5(47), 24695-24706;
|
10.1039/C7TA08074C
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Hybridisation is a powerful strategy towards the next generation of
multifunctional materials for environmental and sustainable energy
applications. Here, we report a new inorganic nanocarbon hybrid material
prepared with atomically controlled deposition of a monocrystalline TiO2 layer
that conformally coats a macroscopic carbon nanotube (CNT) fiber. Through X-ray
diffraction, Raman spectroscopy and photoemission spectroscopy we detect the
formation of a covalent Ti-O-C bond at the TiO2/CNT interface and a residual
strain of approximately 0.7-2 \%, which is tensile in TiO2 and compressive in
the CNT. It arises after deposition of the amorphous oxide onto the CNT surface
previously functionalized by the oxygen plasma used in ALD. These features are
observed in samples of different TiO2 thickness, in the range from 10 to 80 nm.
Ultraviolet photoemission spectroscopy on a 20 nm-thick TiO2 coated sample
gives a work function of 4.27 eV, between that of TiO2 (4.23 eV) and the CNT
fiber (4.41 eV), and the presence of new interband gap states that shift the
valence band maximum to 1.05 eV below the Fermi level. Photoelectrochemical
measurements demonstrate electron transfer from TiO2 to the CNT fiber network
under UV irradiation. Electrochemical impedance spectroscopy measurements
reveal a low resistance for charge transfer and transport, as well as a large
capacitance. Our results point to the fact that these hybrids, in which each
phase has nanometric thickness and the current collector is integrated into the
material, are very different from conventional electrodes and can provide a
number of superior properties.
|
[{'version': 'v1', 'created': 'Mon, 11 Feb 2019 20:38:49 GMT'}]
|
2019-02-13
|
[array(['Moya', 'A.', ''], dtype=object)
array(['Kemnade', 'N.', ''], dtype=object)
array(['Osorio', 'M. R.', ''], dtype=object)
array(['Cherevan', 'A.', ''], dtype=object)
array(['Granados', 'D.', ''], dtype=object)
array(['Eder', 'D.', ''], dtype=object)
array(['Vilatela', 'J. J.', ''], dtype=object)]
|
1,689 |
0802.3727
|
Jian-Xiong Wang
|
Bin Gong and Jian-Xiong Wang
|
QCD corrections to J/psi polarization of hadronproduction at Tevatron
and LHC
|
4 pages, 3 figures
|
Phys.Rev.Lett.100:232001,2008
|
10.1103/PhysRevLett.100.232001
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The next to leading order (NLO) QCD corrections to J/psi polarization of
hadronproduction at Tevatron and LHC are calculated. The results show that the
J/psi polarization is extremely changed from more transversal polarization at
leading order (LO) into more longitudinal polarization at NLO. Although it
gives more longitudinal polarization than the recent experimental result on the
J/psi polarization at Tevatron. It sheds light on the solution to the large
discrepancy of J/psi polarization between theoretical predication and
experimental measurement, and suggests that the next important step is to
calculate the NLO correction for color octet state J/psi^{(8)}
hadronproduction. Our calculations are performed in two ways where the
polarizations are summed analytically or not, and they are checked with each
other. It also gives a K factor for total cross section (ratio of NLO to LO) of
about 2 and shows that the NLO corrections boost the J/psi production for about
2 order of magnitude in high transverse momentum p_t region of J/psi, which
confirms the calculation by Campbell, Maltoni and Tramontano.
|
[{'version': 'v1', 'created': 'Tue, 26 Feb 2008 01:56:07 GMT'}]
|
2008-11-26
|
[array(['Gong', 'Bin', ''], dtype=object)
array(['Wang', 'Jian-Xiong', ''], dtype=object)]
|
1,690 |
math-ph/0206038
|
Joachim Nzotungicimpaye
|
Joachim Nzotungicimpaye
|
Yank and Hooke's constant group theoretically
| null | null | null | null |
math-ph math.MP math.SG
| null |
We study the second central extension of the (1+1) Aristotle Lie.We find that
the first central extension admit four orbits on the dual of second central
extension of the (1+1) Aristotle Lie group.The generic orbit is characterised
by a Hooke's constant k and a yank y.If the physics of the orbit is studied
with respect the evolution in time,it represents an elementary system with
internal energy U in a posotion-momentum under the conjugation of a Hooke's
force and a damping one proportional to the velocity as in particle
mechanics.If the physics of the orbit is studied with respect the evolution in
space, it represents an elementary system with an internal momentum P under the
conjugation of a kind of Hooke's force and a damping one proportional to a
slowness, slowness usually used in time travel waves.
|
[{'version': 'v1', 'created': 'Sat, 22 Jun 2002 10:00:56 GMT'}]
|
2007-05-23
|
[array(['Nzotungicimpaye', 'Joachim', ''], dtype=object)]
|
1,691 |
1610.02379
|
John E. McCarthy
|
Jim Agler and John E. McCarthy
|
Interpolating sequences on the bidisk
| null |
International Journal of Mathematics, Vol. 12 No. 9 [2001]
1103-1114
| null | null |
math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We give a characterization of interpolating sequences for bounded analytic
functions on the bidisk.
|
[{'version': 'v1', 'created': 'Fri, 7 Oct 2016 19:14:48 GMT'}]
|
2016-10-10
|
[array(['Agler', 'Jim', ''], dtype=object)
array(['McCarthy', 'John E.', ''], dtype=object)]
|
1,692 |
2111.09656
|
Yixuan Wang
|
Pengfei Zhang, Zhengyuan Jiang, Yixuan Wang and Yu Li
|
CLMB: deep contrastive learning for robust metagenomic binning
|
20 pages, 9 figures
| null | null | null |
cs.LG cs.AI q-bio.GN q-bio.QM
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
The reconstruction of microbial genomes from large metagenomic datasets is a
critical procedure for finding uncultivated microbial populations and defining
their microbial functional roles. To achieve that, we need to perform
metagenomic binning, clustering the assembled contigs into draft genomes.
Despite the existing computational tools, most of them neglect one important
property of the metagenomic data, that is, the noise. To further improve the
metagenomic binning step and reconstruct better metagenomes, we propose a deep
Contrastive Learning framework for Metagenome Binning (CLMB), which can
efficiently eliminate the disturbance of noise and produce more stable and
robust results. Essentially, instead of denoising the data explicitly, we add
simulated noise to the training data and force the deep learning model to
produce similar and stable representations for both the noise-free data and the
distorted data. Consequently, the trained model will be robust to noise and
handle it implicitly during usage. CLMB outperforms the previous
state-of-the-art binning methods significantly, recovering the most
near-complete genomes on almost all the benchmarking datasets (up to 17\% more
reconstructed genomes compared to the second-best method). It also improves the
performance of bin refinement, reconstructing 8-22 more high-quality genomes
and 15-32 more middle-quality genomes than the second-best result.
Impressively, in addition to being compatible with the binning refiner, single
CLMB even recovers on average 15 more HQ genomes than the refiner of VAMB and
Maxbin on the benchmarking datasets. CLMB is open-source and available at
https://github.com/zpf0117b/CLMB/.
|
[{'version': 'v1', 'created': 'Thu, 18 Nov 2021 12:26:02 GMT'}]
|
2021-11-19
|
[array(['Zhang', 'Pengfei', ''], dtype=object)
array(['Jiang', 'Zhengyuan', ''], dtype=object)
array(['Wang', 'Yixuan', ''], dtype=object)
array(['Li', 'Yu', ''], dtype=object)]
|
1,693 |
1305.5266
|
Kerstin Daechert
|
Kerstin Daechert and Kathrin Klamroth
|
A linear bound on the number of scalarizations needed to solve discrete
tricriteria optimization problems
|
32 pages, 8 figures, Journal of Global Optimization, 2014
| null |
10.1007/s10898-014-0205-z
| null |
math.OC cs.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
General multi-objective optimization problems are often solved by a sequence
of parametric single objective problems, so-called scalarizations. If the set
of nondominated points is finite, and if an appropriate scalarization is
employed, the entire nondominated set can be generated in this way. In the
bicriteria case it is well known that this can be realized by an adaptive
approach which, given an appropriate initial search space, requires the
solution of a number of subproblems which is at most two times the number of
nondominated points. For higher dimensional problems, no linear methods were
known up to now. We present a new procedure for finding the entire nondominated
set of tricriteria optimization problems for which the number of scalarized
subproblems to be solved is at most three times the number of nondominated
points of the underlying problem. The approach includes an iterative update of
the search space that, given a (sub-)set of nondominated points, describes the
area in which additional nondominated points may be located. In particular, we
show that the number of boxes, into which the search space is decomposed,
depends linearly on the number of nondominated points.
|
[{'version': 'v1', 'created': 'Wed, 22 May 2013 20:46:45 GMT'}
{'version': 'v2', 'created': 'Wed, 19 Jun 2013 10:35:52 GMT'}
{'version': 'v3', 'created': 'Mon, 28 Jul 2014 10:49:53 GMT'}]
|
2014-07-29
|
[array(['Daechert', 'Kerstin', ''], dtype=object)
array(['Klamroth', 'Kathrin', ''], dtype=object)]
|
1,694 |
1810.01873
|
Mustafa Haider
|
Adnan Haider and P.C. Woodland
|
Combining Natural Gradient with Hessian Free Methods for Sequence
Training
|
in Proc. INTERSPEECH 2018, September 2-6, 2018, Hyderabad, India
| null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper presents a new optimisation approach to train Deep Neural Networks
(DNNs) with discriminative sequence criteria. At each iteration, the method
combines information from the Natural Gradient (NG) direction with local
curvature information of the error surface that enables better paths on the
parameter manifold to be traversed. The method is derived using an alternative
derivation of Taylor's theorem using the concepts of manifolds, tangent vectors
and directional derivatives from the perspective of Information Geometry. The
efficacy of the method is shown within a Hessian Free (HF) style optimisation
framework to sequence train both standard fully-connected DNNs and Time Delay
Neural Networks as speech recognition acoustic models. It is shown that for the
same number of updates the proposed approach achieves larger reductions in the
word error rate (WER) than both NG and HF, and also leads to a lower WER than
standard stochastic gradient descent. The paper also addresses the issue of
over-fitting due to mismatch between training criterion and Word Error Rate
(WER) that primarily arises during sequence training of ReLU-DNN models.
|
[{'version': 'v1', 'created': 'Wed, 3 Oct 2018 13:58:12 GMT'}]
|
2018-10-05
|
[array(['Haider', 'Adnan', ''], dtype=object)
array(['Woodland', 'P. C.', ''], dtype=object)]
|
1,695 |
1802.05000
|
Andrey Fraerman
|
S. N. Vdovichev, N. I. Polushkin, I. D. Rodionov, V. N. Prudnikov, J.
Chang, and A. A. Fraerman
|
High magnetocaloric efficiency of a NiFe/NiCu/CoFe/MnIr multilayer in a
small magnetic field
|
7 pages, 4 figures
|
Phys. Rev. B 98, 014428 (2018)
|
10.1103/PhysRevB.98.014428
| null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The isothermal magnetic entropy changes are studied in
Ni80Fe20/Ni67Cu33/Co90Cu10/Mn80Ir20 stacks at temperatures near the Curie point
of the Ni67Cu33 spacer by applying magnetic fields in a few tens of Oersted.
Such low fields were sufficient for toggling magnetic moments in the soft
ferromagnetic (FM) layer (Ni80Fe20). It is found out that this switching
provides the magnetic entropy change, which is up to 20 times larger than that
achievable in a single Ni67Cu33 film subjected to such low fields. Our finding
holds promise to be utilized in the magnetocaloric devices that would be based
on FM/PM/FM heterostructures and would operate with moderate magnetic fields.
|
[{'version': 'v1', 'created': 'Wed, 14 Feb 2018 09:26:40 GMT'}]
|
2018-08-01
|
[array(['Vdovichev', 'S. N.', ''], dtype=object)
array(['Polushkin', 'N. I.', ''], dtype=object)
array(['Rodionov', 'I. D.', ''], dtype=object)
array(['Prudnikov', 'V. N.', ''], dtype=object)
array(['Chang', 'J.', ''], dtype=object)
array(['Fraerman', 'A. A.', ''], dtype=object)]
|
1,696 |
1706.04819
|
Ulrich Schneider
|
Martin Reitter, Jakob N\"ager, Karen Wintersperger, Christoph
Str\"ater, Immanuel Bloch, Andr\'e Eckardt, Ulrich Schneider
|
Interaction dependent heating and atom loss in a periodically driven
optical lattice
|
5 pages + Appendix
|
Phys. Rev. Lett. 119, 200402 (2017)
|
10.1103/PhysRevLett.119.200402
| null |
cond-mat.quant-gas quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Periodic driving of optical lattices has enabled the creation of novel
bandstructures not realizable in static lattice systems, such as topological
bands for neutral particles. However, especially driven systems of interacting
bosonic particles often suffer from strong heating. We have systematically
studied heating in an interacting Bose-Einstein condensate in a driven
one-dimensional optical lattice. We find interaction-dependent heating rates
that depend both on the scattering length and the driving strength and identify
the underlying resonant intra- and interband scattering processes. By comparing
experimental data and theory, we find that for driving frequencies well above
the trap depth, the heating rate is dramatically reduced by the fact that
resonantly scattered atoms leave the trap before dissipating their energy into
the system. This mechanism of Floquet evaporative cooling offers a powerful
strategy to minimize heating in Floquet engineered quantum gases.
|
[{'version': 'v1', 'created': 'Thu, 15 Jun 2017 11:20:01 GMT'}]
|
2017-11-22
|
[array(['Reitter', 'Martin', ''], dtype=object)
array(['Näger', 'Jakob', ''], dtype=object)
array(['Wintersperger', 'Karen', ''], dtype=object)
array(['Sträter', 'Christoph', ''], dtype=object)
array(['Bloch', 'Immanuel', ''], dtype=object)
array(['Eckardt', 'André', ''], dtype=object)
array(['Schneider', 'Ulrich', ''], dtype=object)]
|
1,697 |
1904.11148
|
Yuzhou Liu
|
Yuzhou Liu and DeLiang Wang
|
Divide and Conquer: A Deep CASA Approach to Talker-independent Monaural
Speaker Separation
|
10 pages, 5 figures
| null | null | null |
cs.SD cs.LG eess.AS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We address talker-independent monaural speaker separation from the
perspectives of deep learning and computational auditory scene analysis (CASA).
Specifically, we decompose the multi-speaker separation task into the stages of
simultaneous grouping and sequential grouping. Simultaneous grouping is first
performed in each time frame by separating the spectra of different speakers
with a permutation-invariantly trained neural network. In the second stage, the
frame-level separated spectra are sequentially grouped to different speakers by
a clustering network. The proposed deep CASA approach optimizes frame-level
separation and speaker tracking in turn, and produces excellent results for
both objectives. Experimental results on the benchmark WSJ0-2mix database show
that the new approach achieves the state-of-the-art results with a modest model
size.
|
[{'version': 'v1', 'created': 'Thu, 25 Apr 2019 03:57:11 GMT'}]
|
2019-04-26
|
[array(['Liu', 'Yuzhou', ''], dtype=object)
array(['Wang', 'DeLiang', ''], dtype=object)]
|
1,698 |
quant-ph/0404013
|
Marco Genovese
|
G. Brida, M. Genovese, M. Gramegna, E. Predazzi
|
A conclusive experiment to throw more light on "light"
| null |
Physics Letters A 328 (2004) 313
|
10.1016/j.physleta.2004.06.050
|
IEN march 2004
|
quant-ph
| null |
We describe a new realization of Ghose, Home, Agarwal experiment on wave
particle duality of light where some limitations of the former experiment,
realized by Mizobuchi and Ohtake, are overcome. Our results clearly indicate
that wave-particle complementarity must be understood between interference and
"whelcher weg" knowledge and not in a more general sense.
|
[{'version': 'v1', 'created': 'Fri, 2 Apr 2004 13:25:03 GMT'}]
|
2009-11-10
|
[array(['Brida', 'G.', ''], dtype=object)
array(['Genovese', 'M.', ''], dtype=object)
array(['Gramegna', 'M.', ''], dtype=object)
array(['Predazzi', 'E.', ''], dtype=object)]
|
1,699 |
cond-mat/0401158
|
Hai Huang
|
Hai Huang, Ian Affleck
|
Susceptibility and Dzyaloshinskii-Moriya interaction in the Haldane gap
compound NENP
|
14 pages, 6 figures
| null |
10.1103/PhysRevB.69.184414
| null |
cond-mat.str-el
| null |
The Haldane gap material NENP exhibits anomalies in its Knight shift, far
infrared absorption and field-dependent gaps, which have been explained using
the staggered $g$-tensor that occurs due to the low crystal symmetry. We point
out that the low-temperature susceptibility is also anomalous and that a
consistent interpretation of all data may require consideration of the
Dzyaloshinskii-Moriya interaction.
|
[{'version': 'v1', 'created': 'Fri, 9 Jan 2004 20:16:53 GMT'}
{'version': 'v2', 'created': 'Fri, 9 Jan 2004 21:26:52 GMT'}
{'version': 'v3', 'created': 'Mon, 12 Jan 2004 23:49:38 GMT'}]
|
2009-11-10
|
[array(['Huang', 'Hai', ''], dtype=object)
array(['Affleck', 'Ian', ''], dtype=object)]
|
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