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44.4k
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
700 |
2107.09224
|
Zheng Wen
|
Zheng Wen, Ian Osband, Chao Qin, Xiuyuan Lu, Morteza Ibrahimi,
Vikranth Dwaracherla, Mohammad Asghari, Benjamin Van Roy
|
From Predictions to Decisions: The Importance of Joint Predictive
Distributions
| null | null | null | null |
cs.LG stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A fundamental challenge for any intelligent system is prediction: given some
inputs, can you predict corresponding outcomes? Most work on supervised
learning has focused on producing accurate marginal predictions for each input.
However, we show that for a broad class of decision problems, accurate joint
predictions are required to deliver good performance. In particular, we
establish several results pertaining to combinatorial decision problems,
sequential predictions, and multi-armed bandits to elucidate the essential role
of joint predictive distributions. Our treatment of multi-armed bandits
introduces an approximate Thompson sampling algorithm and analytic techniques
that lead to a new kind of regret bound.
|
[{'version': 'v1', 'created': 'Tue, 20 Jul 2021 01:55:01 GMT'}
{'version': 'v2', 'created': 'Tue, 1 Feb 2022 19:41:54 GMT'}
{'version': 'v3', 'created': 'Mon, 23 May 2022 22:17:14 GMT'}]
|
2022-05-25
|
[array(['Wen', 'Zheng', ''], dtype=object)
array(['Osband', 'Ian', ''], dtype=object)
array(['Qin', 'Chao', ''], dtype=object)
array(['Lu', 'Xiuyuan', ''], dtype=object)
array(['Ibrahimi', 'Morteza', ''], dtype=object)
array(['Dwaracherla', 'Vikranth', ''], dtype=object)
array(['Asghari', 'Mohammad', ''], dtype=object)
array(['Van Roy', 'Benjamin', ''], dtype=object)]
|
701 |
1210.6830
|
Devrim Tarhan
|
Devrim Tarhan, Sumei Huang, and Ozgur E. Mustecaplioglu
|
Superluminal and Ultraslow Light Propagation in Optomechanical Systems
|
6 pages, 10 figures
|
Physical Review A 87, 013824 (2013)
|
10.1103/PhysRevA.87.013824
| null |
quant-ph physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider an optomechanical double-ended cavity under the action of a
coupling laser and a probe laser in electromagnetically induced transparency
configuration. It is shown how the group delay and advance of the probe field
can be controlled by the power of the coupling field. In contrast to
single-ended cavities, only allowing for superluminal propagation, possibility
of both superluminal and subluminal propagation regimes are found. The
magnitudes of the group delay and the advance are calculated to be 1ms and -2s,
respectively, at a very low pumping power of a few microwatts. In addition,
interaction of the optomechanical cavity with a time dependent probe field is
investigated for controlled excitations of mirror vibrations.
|
[{'version': 'v1', 'created': 'Thu, 25 Oct 2012 13:37:19 GMT'}
{'version': 'v2', 'created': 'Mon, 4 Feb 2013 10:25:11 GMT'}]
|
2013-02-05
|
[array(['Tarhan', 'Devrim', ''], dtype=object)
array(['Huang', 'Sumei', ''], dtype=object)
array(['Mustecaplioglu', 'Ozgur E.', ''], dtype=object)]
|
702 |
0903.0276
|
Maziar Nekovee
|
Maziar Nekovee
|
Impact of Cognitive Radio on Future Management of Spectrum
|
Invited Paper, presented at the International Conference on Cognitive
Radio Oriented Wireless Communications and Networks (CrownCom), May 2008,
Singapore
| null | null | null |
cs.AI cs.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Cognitive radio is a breakthrough technology which is expected to have a
profound impact on the way radio spectrum will be accessed, managed and shared
in the future. In this paper I examine some of the implications of cognitive
radio for future management of spectrum. Both a near-term view involving the
opportunistic spectrum access model and a longer-term view involving a
self-regulating dynamic spectrum access model within a society of cognitive
radios are discussed.
|
[{'version': 'v1', 'created': 'Mon, 2 Mar 2009 12:27:12 GMT'}]
|
2009-03-03
|
[array(['Nekovee', 'Maziar', ''], dtype=object)]
|
703 |
1507.07248
|
Jing Ping Wang
|
Alexander V. Mikhailov, Georgios Papamikos and Jing Ping Wang
|
Darboux transformation for the vector sine-Gordon equation and
integrable equations on a sphere
| null |
Letters in Mathematical Physics, 2016
|
10.1007/s11005-016-0855-5
| null |
nlin.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a method for construction of Darboux transformations, which is a
new development of the dressing method for Lax operators invariant under a
reduction group. We apply the method to the vector sine-Gordon equation and
derive its B\"acklund transformations. We show that there is a new Lax operator
canonically associated with our Darboux transformation resulting an
evolutionary differential-difference system on a sphere. The latter is a
generalised symmetry for the chain of B\"acklund transformations. Using the
re-factorisation approach and the Bianchi permutability of the Darboux
transformations we derive new vector Yang-Baxter map and integrable discrete
vector sine-Gordon equation on a sphere.
|
[{'version': 'v1', 'created': 'Sun, 26 Jul 2015 20:35:54 GMT'}]
|
2016-06-08
|
[array(['Mikhailov', 'Alexander V.', ''], dtype=object)
array(['Papamikos', 'Georgios', ''], dtype=object)
array(['Wang', 'Jing Ping', ''], dtype=object)]
|
704 |
physics/0703235
|
Philippe Odier
|
R. Volk, P. Odier, J.-F. Pinton
|
Dynamo action in cylindrical annulus
|
45 pages, 18 figures
| null | null | null |
physics.flu-dyn physics.geo-ph
| null |
We study numerically the induction mechanisms generated from an array of
helical motions distributed along a cylinder. Our flow is a very idealized
geometry of the columnar structure that has been proposed for the convective
motion inside the Earth core. Using an analytically prescribed flow, we apply a
recently introduced iterative numerical scheme to solve the induction equation
and analyze the flow response to externally applied fields with simple
geometries (azimuthal, radial, etc.). Symmetry properties allow us to build
selected induction modes whose interactions lead to dynamo mechanisms. Using an
induction operator formalism, we show how dipole and quadrupole dynamos can be
envisioned from such motions.
|
[{'version': 'v1', 'created': 'Mon, 26 Mar 2007 22:40:01 GMT'}]
|
2007-05-23
|
[array(['Volk', 'R.', ''], dtype=object)
array(['Odier', 'P.', ''], dtype=object)
array(['Pinton', 'J. -F.', ''], dtype=object)]
|
705 |
1507.02432
|
Oleg Smirnov
|
O. Y. Smirnov, M. Agostini, S. Appel, G. Bellini, J. Benziger, D.
Bick, G. Bonfini, D. Bravo, B. Caccianiga, F. Calaprice, A. Caminata, P.
Cavalcante, A. Chepurnov, K. Choi, D. D'Angelo, S. Davini, A. Derbin, L. Di
Noto, I. Drachnev, A. Empl, A. Etenko, K. Fomenko, D. Franco, F. Gabriele, C.
Galbiati, C. Ghiano, M. Giammarchi, M. Goeger-Neff, A. Goretti, M. Gromov, C.
Hagner, E. Hungerford, Aldo Ianni, Andrea Ianni, K. Jedrzejczak, M. Kaiser,
V. Kobychev, D. Korablev, G. Korga, D. Kryn, M. Laubenstein, B. Lehnert, E.
Litvinovich, F. Lombardi, P. Lombardi, L. Ludhova, G. Lukyanchenko, I.
Machulin, S. Manecki, W. Maneschg, S. Marcocci, E. Meroni, M. Meyer, L.
Miramonti, M. Misiaszek, P. Mosteiro, V. Muratova, B. Neumair, L. Oberauer,
M. Obolensky, F. Ortica, K. Otis, L. Pagani, M. Pallavicini, L. Papp, L.
Perasso, A. Pocar, G. Ranucci, A. Razeto, A. Re, A. Romani, R. Roncin, N.
Rossi, S. Sch\"onert, D. Semenov, H. Simgen, M. Skorokhvatov, A. Sotnikov, S.
Sukhotin, Y. Suvorov, R. Tartaglia, G. Testera, J. Thurn, M. Toropova, E.
Unzhakov, R. B. Vogelaar, F. von Feilitzsch, H. Wang, S. Weinz, J. Winter, M.
Wojcik, M. Wurm, Z. Yokley, O. Zaimidoroga, S. Zavatarelli, K. Zuber, and G.
Zuzel
|
Measurement of neutrino flux from the primary proton--proton fusion
process in the Sun with Borexino detector
|
15 pages, 2 tables, 3 figures
| null |
10.1134/S106377961606023X
| null |
hep-ex nucl-ex physics.ins-det
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Neutrino produced in a chain of nuclear reactions in the Sun starting from
the fusion of two protons, for the first time has been detected in a real-time
detector in spectrometric mode. The unique properties of the Borexino detector
provided an oppurtunity to disentangle pp-neutrino spectrum from the background
components. A comparison of the total neutrino flux from the Sun with Solar
luminosity in photons provides a test of the stability of the Sun on the
10$^{5}$ years time scale, and sets a strong limit on the power production in
the unknown energy sources in the Sun of no more than 4\% of the total energy
production at 90\% C.L.
|
[{'version': 'v1', 'created': 'Thu, 9 Jul 2015 09:42:18 GMT'}]
|
2016-11-23
|
[array(['Smirnov', 'O. Y.', ''], dtype=object)
array(['Agostini', 'M.', ''], dtype=object)
array(['Appel', 'S.', ''], dtype=object)
array(['Bellini', 'G.', ''], dtype=object)
array(['Benziger', 'J.', ''], dtype=object)
array(['Bick', 'D.', ''], dtype=object)
array(['Bonfini', 'G.', ''], dtype=object)
array(['Bravo', 'D.', ''], dtype=object)
array(['Caccianiga', 'B.', ''], dtype=object)
array(['Calaprice', 'F.', ''], dtype=object)
array(['Caminata', 'A.', ''], dtype=object)
array(['Cavalcante', 'P.', ''], dtype=object)
array(['Chepurnov', 'A.', ''], dtype=object)
array(['Choi', 'K.', ''], dtype=object)
array(["D'Angelo", 'D.', ''], dtype=object)
array(['Davini', 'S.', ''], dtype=object)
array(['Derbin', 'A.', ''], dtype=object)
array(['Di Noto', 'L.', ''], dtype=object)
array(['Drachnev', 'I.', ''], dtype=object)
array(['Empl', 'A.', ''], dtype=object)
array(['Etenko', 'A.', ''], dtype=object)
array(['Fomenko', 'K.', ''], dtype=object)
array(['Franco', 'D.', ''], dtype=object)
array(['Gabriele', 'F.', ''], dtype=object)
array(['Galbiati', 'C.', ''], dtype=object)
array(['Ghiano', 'C.', ''], dtype=object)
array(['Giammarchi', 'M.', ''], dtype=object)
array(['Goeger-Neff', 'M.', ''], dtype=object)
array(['Goretti', 'A.', ''], dtype=object)
array(['Gromov', 'M.', ''], dtype=object)
array(['Hagner', 'C.', ''], dtype=object)
array(['Hungerford', 'E.', ''], dtype=object)
array(['Ianni', 'Aldo', ''], dtype=object)
array(['Ianni', 'Andrea', ''], dtype=object)
array(['Jedrzejczak', 'K.', ''], dtype=object)
array(['Kaiser', 'M.', ''], dtype=object)
array(['Kobychev', 'V.', ''], dtype=object)
array(['Korablev', 'D.', ''], dtype=object)
array(['Korga', 'G.', ''], dtype=object)
array(['Kryn', 'D.', ''], dtype=object)
array(['Laubenstein', 'M.', ''], dtype=object)
array(['Lehnert', 'B.', ''], dtype=object)
array(['Litvinovich', 'E.', ''], dtype=object)
array(['Lombardi', 'F.', ''], dtype=object)
array(['Lombardi', 'P.', ''], dtype=object)
array(['Ludhova', 'L.', ''], dtype=object)
array(['Lukyanchenko', 'G.', ''], dtype=object)
array(['Machulin', 'I.', ''], dtype=object)
array(['Manecki', 'S.', ''], dtype=object)
array(['Maneschg', 'W.', ''], dtype=object)
array(['Marcocci', 'S.', ''], dtype=object)
array(['Meroni', 'E.', ''], dtype=object)
array(['Meyer', 'M.', ''], dtype=object)
array(['Miramonti', 'L.', ''], dtype=object)
array(['Misiaszek', 'M.', ''], dtype=object)
array(['Mosteiro', 'P.', ''], dtype=object)
array(['Muratova', 'V.', ''], dtype=object)
array(['Neumair', 'B.', ''], dtype=object)
array(['Oberauer', 'L.', ''], dtype=object)
array(['Obolensky', 'M.', ''], dtype=object)
array(['Ortica', 'F.', ''], dtype=object)
array(['Otis', 'K.', ''], dtype=object)
array(['Pagani', 'L.', ''], dtype=object)
array(['Pallavicini', 'M.', ''], dtype=object)
array(['Papp', 'L.', ''], dtype=object)
array(['Perasso', 'L.', ''], dtype=object)
array(['Pocar', 'A.', ''], dtype=object)
array(['Ranucci', 'G.', ''], dtype=object)
array(['Razeto', 'A.', ''], dtype=object)
array(['Re', 'A.', ''], dtype=object)
array(['Romani', 'A.', ''], dtype=object)
array(['Roncin', 'R.', ''], dtype=object)
array(['Rossi', 'N.', ''], dtype=object)
array(['Schönert', 'S.', ''], dtype=object)
array(['Semenov', 'D.', ''], dtype=object)
array(['Simgen', 'H.', ''], dtype=object)
array(['Skorokhvatov', 'M.', ''], dtype=object)
array(['Sotnikov', 'A.', ''], dtype=object)
array(['Sukhotin', 'S.', ''], dtype=object)
array(['Suvorov', 'Y.', ''], dtype=object)
array(['Tartaglia', 'R.', ''], dtype=object)
array(['Testera', 'G.', ''], dtype=object)
array(['Thurn', 'J.', ''], dtype=object)
array(['Toropova', 'M.', ''], dtype=object)
array(['Unzhakov', 'E.', ''], dtype=object)
array(['Vogelaar', 'R. B.', ''], dtype=object)
array(['von Feilitzsch', 'F.', ''], dtype=object)
array(['Wang', 'H.', ''], dtype=object)
array(['Weinz', 'S.', ''], dtype=object)
array(['Winter', 'J.', ''], dtype=object)
array(['Wojcik', 'M.', ''], dtype=object)
array(['Wurm', 'M.', ''], dtype=object)
array(['Yokley', 'Z.', ''], dtype=object)
array(['Zaimidoroga', 'O.', ''], dtype=object)
array(['Zavatarelli', 'S.', ''], dtype=object)
array(['Zuber', 'K.', ''], dtype=object)
array(['Zuzel', 'G.', ''], dtype=object)]
|
706 |
1703.09838
|
Marcelo Ebert
|
Marcelo Rempel Ebert, Michael Reissig
|
Regularity theory and global existence of small data solutions to
semi-linear de Sitter models with power non-linearity
|
32 pages
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we study the Cauchy problem for semi-linear de Sitter models
with power non-linearity. The model of interest is \[ \phi_{tt} - e^{-2t}
\Delta \phi + n\phi_t+m^2\phi=|\phi|^p,\quad
(\phi(0,x),\phi_t(0,x))=(f(x),g(x)),\] where $m^2$ is a non-negative constant.
We study the global (in time) existence of small data solutions. In particular,
we show the interplay between the power $p$, admissible data spaces and
admissible spaces of solutions (in weak sense, in sense of energy solutions or
in classical sense).
|
[{'version': 'v1', 'created': 'Tue, 28 Mar 2017 23:29:32 GMT'}]
|
2017-03-30
|
[array(['Ebert', 'Marcelo Rempel', ''], dtype=object)
array(['Reissig', 'Michael', ''], dtype=object)]
|
707 |
1005.1884
|
Dmitry Batenkov
|
Dmitry Batenkov, Yosef Yomdin
|
Algebraic Fourier reconstruction of piecewise smooth functions
| null |
Math. Comp. 81 (2012), 277-318
|
10.1090/S0025-5718-2011-02539-1
| null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Accurate reconstruction of piecewise-smooth functions from a finite number of
Fourier coefficients is an important problem in various applications. The
inherent inaccuracy, in particular the Gibbs phenomenon, is being intensively
investigated during the last decades. Several nonlinear reconstruction methods
have been proposed, and it is by now well-established that the "classical"
convergence order can be completely restored up to the discontinuities. Still,
the maximal accuracy of determining the positions of these discontinuities
remains an open question. In this paper we prove that the locations of the
jumps (and subsequently the pointwise values of the function) can be
reconstructed with at least "half the classical accuracy". In particular, we
develop a constructive approximation procedure which, given the first $k$
Fourier coefficients of a piecewise-$C^{2d+1}$ function, recovers the locations
of the jumps with accuracy $\sim k^{-(d+2)}$, and the values of the function
between the jumps with accuracy $\sim k^{-(d+1)}$ (similar estimates are
obtained for the associated jump magnitudes). A key ingredient of the algorithm
is to start with the case of a single discontinuity, where a modified version
of one of the existing algebraic methods (due to K.Eckhoff) may be applied. It
turns out that the additional orders of smoothness produce a highly correlated
error terms in the Fourier coefficients, which eventually cancel out in the
corresponding algebraic equations. To handle more than one jump, we propose to
apply a localization procedure via a convolution in the Fourier domain.
|
[{'version': 'v1', 'created': 'Tue, 11 May 2010 16:38:46 GMT'}
{'version': 'v2', 'created': 'Thu, 13 May 2010 23:22:11 GMT'}]
|
2012-11-12
|
[array(['Batenkov', 'Dmitry', ''], dtype=object)
array(['Yomdin', 'Yosef', ''], dtype=object)]
|
708 |
0901.1518
|
Johan Segers
|
Jan Beirlant, Elisabeth Joossens, Johan Segers
|
Second-order refined peaks-over-threshold modelling for heavy-tailed
distributions
|
to appear in the Journal of Statistical Planning and Inference
| null | null |
Univ catholique de Louvain, Institut de statistique DP0824
|
math.ST stat.TH
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Modelling excesses over a high threshold using the Pareto or generalized
Pareto distribution (PD/GPD) is the most popular approach in extreme value
statistics. This method typically requires high thresholds in order for the
(G)PD to fit well and in such a case applies only to a small upper fraction of
the data. The extension of the (G)PD proposed in this paper is able to describe
the excess distribution for lower thresholds in case of heavy tailed
distributions. This yields a statistical model that can be fitted to a larger
portion of the data. Moreover, estimates of tail parameters display stability
for a larger range of thresholds. Our findings are supported by asymptotic
results, simulations and a case study.
|
[{'version': 'v1', 'created': 'Mon, 12 Jan 2009 08:30:29 GMT'}]
|
2009-01-13
|
[array(['Beirlant', 'Jan', ''], dtype=object)
array(['Joossens', 'Elisabeth', ''], dtype=object)
array(['Segers', 'Johan', ''], dtype=object)]
|
709 |
2211.14508
|
Xiaojun Meng
|
Xiaojun Meng, Wenlin Dai, Yasheng Wang, Baojun Wang, Zhiyong Wu, Xin
Jiang, Qun Liu
|
Lexicon-injected Semantic Parsing for Task-Oriented Dialog
| null | null | null | null |
cs.CL cs.AI
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
Recently, semantic parsing using hierarchical representations for dialog
systems has captured substantial attention. Task-Oriented Parse (TOP), a tree
representation with intents and slots as labels of nested tree nodes, has been
proposed for parsing user utterances. Previous TOP parsing methods are limited
on tackling unseen dynamic slot values (e.g., new songs and locations added),
which is an urgent matter for real dialog systems. To mitigate this issue, we
first propose a novel span-splitting representation for span-based parser that
outperforms existing methods. Then we present a novel lexicon-injected semantic
parser, which collects slot labels of tree representation as a lexicon, and
injects lexical features to the span representation of parser. An additional
slot disambiguation technique is involved to remove inappropriate span match
occurrences from the lexicon. Our best parser produces a new state-of-the-art
result (87.62%) on the TOP dataset, and demonstrates its adaptability to
frequently updated slot lexicon entries in real task-oriented dialog, with no
need of retraining.
|
[{'version': 'v1', 'created': 'Sat, 26 Nov 2022 07:59:20 GMT'}]
|
2022-11-29
|
[array(['Meng', 'Xiaojun', ''], dtype=object)
array(['Dai', 'Wenlin', ''], dtype=object)
array(['Wang', 'Yasheng', ''], dtype=object)
array(['Wang', 'Baojun', ''], dtype=object)
array(['Wu', 'Zhiyong', ''], dtype=object)
array(['Jiang', 'Xin', ''], dtype=object)
array(['Liu', 'Qun', ''], dtype=object)]
|
710 |
2111.05993
|
Sachithra Lokuge
|
Ruwan Nagahawatta, Sachithra Lokuge, Matthew Warren and Scott Salzman
|
Cybersecurity Issues and Practices in a Cloud Context: A Comparison
Amongst Micro, Small and Medium Enterprises
| null | null | null | null |
cs.CR cs.IT math.IT
|
http://creativecommons.org/licenses/by/4.0/
|
The advancement and the proliferation of information systems among
enterprises have given rise to understanding cybersecurity. Cybersecurity
practices provide a set of techniques and procedures to protect the systems,
networks, programs and data from attack, damage, or unauthorised access. Such
cybersecurity practices vary and are applied differently to different types of
enterprises. The purpose of this research is to compare the critical
cybersecurity threats and practices in the cloud context among micro, small,
and medium enterprises. By conducting a survey among 289 micro, small and
medium-sized enterprises in Australia, this study highlights the significant
differences in their cloud security practices. It also concludes that future
studies that focus on cybersecurity issues and practices in the context of
cloud computing should pay attention to these differences.
|
[{'version': 'v1', 'created': 'Wed, 10 Nov 2021 23:48:50 GMT'}]
|
2021-11-12
|
[array(['Nagahawatta', 'Ruwan', ''], dtype=object)
array(['Lokuge', 'Sachithra', ''], dtype=object)
array(['Warren', 'Matthew', ''], dtype=object)
array(['Salzman', 'Scott', ''], dtype=object)]
|
711 |
2004.10293
|
Xu Shen
|
Xu Shen, Ivo Batkovic, Vijay Govindarajan, Paolo Falcone, Trevor
Darrell, and Francesco Borrelli
|
ParkPredict: Motion and Intent Prediction of Vehicles in Parking Lots
|
* Indicates equal contribution. Accepted at IEEE Intelligent Vehicles
Symposium (IV) 2020
| null | null | null |
cs.RO cs.AI cs.LG cs.SY eess.SY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the problem of predicting driver behavior in parking lots, an
environment which is less structured than typical road networks and features
complex, interactive maneuvers in a compact space. Using the CARLA simulator,
we develop a parking lot environment and collect a dataset of human parking
maneuvers. We then study the impact of model complexity and feature information
by comparing a multi-modal Long Short-Term Memory (LSTM) prediction model and a
Convolution Neural Network LSTM (CNN-LSTM) to a physics-based Extended Kalman
Filter (EKF) baseline. Our results show that 1) intent can be estimated well
(roughly 85% top-1 accuracy and nearly 100% top-3 accuracy with the LSTM and
CNN-LSTM model); 2) knowledge of the human driver's intended parking spot has a
major impact on predicting parking trajectory; and 3) the semantic
representation of the environment improves long term predictions.
|
[{'version': 'v1', 'created': 'Tue, 21 Apr 2020 20:46:32 GMT'}]
|
2020-04-23
|
[array(['Shen', 'Xu', ''], dtype=object)
array(['Batkovic', 'Ivo', ''], dtype=object)
array(['Govindarajan', 'Vijay', ''], dtype=object)
array(['Falcone', 'Paolo', ''], dtype=object)
array(['Darrell', 'Trevor', ''], dtype=object)
array(['Borrelli', 'Francesco', ''], dtype=object)]
|
712 |
cond-mat/9512024
|
Hernan Makse
|
Hern\'an A. Makse, Shlomo Havlin, Moshe Schwartz, and H. Eugene
Stanley
|
Method for Generating Long-Range Correlations for Large Systems
|
4 pages, REVTEX, figures available upon request from
[email protected]
| null |
10.1103/PhysRevE.53.5445
| null |
cond-mat
| null |
We propose a new method to generate a sequence of random numbers with
long-range power-law correlations that overcomes known difficulties associated
with large systems. The new method presents an improvement on the commonly-used
methods. We apply the algorithm to generate enhanced diffusion, isotropic and
anisotropic self-affine surfaces, and isotropic and anisotropic correlated
percolation.
|
[{'version': 'v1', 'created': 'Mon, 4 Dec 1995 23:07:15 GMT'}]
|
2009-10-28
|
[array(['Makse', 'Hernán A.', ''], dtype=object)
array(['Havlin', 'Shlomo', ''], dtype=object)
array(['Schwartz', 'Moshe', ''], dtype=object)
array(['Stanley', 'H. Eugene', ''], dtype=object)]
|
713 |
2209.00424
|
Philipp Kindermann
|
Michael A. Bekos, Stefan Felsner, Philipp Kindermann, Stephen
Kobourov, Jan Kratov\'il, Ignaz Rutter
|
The Rique-Number of Graphs
|
Appears in the Proceedings of the 30th International Symposium on
Graph Drawing and Network Visualization (GD 2022)
| null | null | null |
cs.DS cs.DM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We continue the study of linear layouts of graphs in relation to known data
structures. At a high level, given a data structure, the goal is to find a
linear order of the vertices of the graph and a partition of its edges into
pages, such that the edges in each page follow the restriction of the given
data structure in the underlying order. In this regard, the most notable
representatives are the stack and queue layouts, while there exists some work
also for deques.
In this paper, we study linear layouts of graphs that follow the restriction
of a restricted-input queue (rique), in which insertions occur only at the
head, and removals occur both at the head and the tail. We characterize the
graphs admitting rique layouts with a single page and we use the
characterization to derive a corresponding testing algorithm when the input
graph is maximal planar. We finally give bounds on the number of needed pages
(so-called rique-number) of complete graphs.
|
[{'version': 'v1', 'created': 'Thu, 1 Sep 2022 13:03:22 GMT'}]
|
2022-09-02
|
[array(['Bekos', 'Michael A.', ''], dtype=object)
array(['Felsner', 'Stefan', ''], dtype=object)
array(['Kindermann', 'Philipp', ''], dtype=object)
array(['Kobourov', 'Stephen', ''], dtype=object)
array(['Kratovíl', 'Jan', ''], dtype=object)
array(['Rutter', 'Ignaz', ''], dtype=object)]
|
714 |
cond-mat/0004230
|
Konstantin Nikolaev
|
K. R. Nikolaev, A. Yu. Dobin, I. N. Krivorotov, W. K. Cooley, A.
Bhattacharya, A. L. Kobrinskii, L. I. Glazman, R. M. Wentzcovitch, E. Dan
Dahlberg, and A. M. Goldman
|
Oscillatory Exchange Coupling and Positive Magnetoresistance in
Epitaxial Oxide Heterostructures
|
4 pages (RevTeX), 5 figures (EPS)
| null |
10.1103/PhysRevLett.85.3728
| null |
cond-mat.mtrl-sci cond-mat.str-el
| null |
Oscillations in the exchange coupling between ferromagnetic
$La_{2/3}Ba_{1/3}MnO_3$ layers with paramagnetic $LaNiO_3$ spacer layer
thickness has been observed in epitaxial heterostructures of the two oxides.
This behavior is explained within the RKKY model employing an {\it ab initio}
calculated band structure of $LaNiO_3$, taking into account strong electron
scattering in the spacer. Antiferromagnetically coupled superlattices exhibit a
positive current-in-plane magnetoresistance.
|
[{'version': 'v1', 'created': 'Thu, 13 Apr 2000 23:24:22 GMT'}]
|
2009-10-31
|
[array(['Nikolaev', 'K. R.', ''], dtype=object)
array(['Dobin', 'A. Yu.', ''], dtype=object)
array(['Krivorotov', 'I. N.', ''], dtype=object)
array(['Cooley', 'W. K.', ''], dtype=object)
array(['Bhattacharya', 'A.', ''], dtype=object)
array(['Kobrinskii', 'A. L.', ''], dtype=object)
array(['Glazman', 'L. I.', ''], dtype=object)
array(['Wentzcovitch', 'R. M.', ''], dtype=object)
array(['Dahlberg', 'E. Dan', ''], dtype=object)
array(['Goldman', 'A. M.', ''], dtype=object)]
|
715 |
2201.07274
|
EPTCS
|
Alexander Thaller (Linz School of Education, Linz, Austria), Zolt\'an
Kov\'acs (The Private University College of Education of the Diocese of Linz,
Linz, Austria)
|
Online Generation of Proofs Without Words
|
In Proceedings ADG 2021, arXiv:2112.14770
|
EPTCS 352, 2021, pp. 103-105
|
10.4204/EPTCS.352.10
| null |
cs.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Understanding geometric relationships with little mathematical knowledge can
be challenging for today's students and teachers. A new toolset is introduced
that is able to create a proof without words by combining the benefits of the
Geometric Deduction Database method (to obtain a readable proof of a geometric
statement) and the GeoGebra framework (that makes it possible to export these
data as an online applet in a simple way).
|
[{'version': 'v1', 'created': 'Mon, 3 Jan 2022 09:26:36 GMT'}]
|
2022-01-20
|
[array(['Thaller', 'Alexander', '',
'Linz School of Education, Linz, Austria'], dtype=object)
array(['Kovács', 'Zoltán', '',
'The Private University College of Education of the Diocese of Linz,\n Linz, Austria'],
dtype=object) ]
|
716 |
1203.2767
|
M. P. Garcia del Moral
|
M. P. Garcia del Moral, J. M. Pena and A. Restuccia
|
Supermembrane origin of type II gauged supergravities in 9D
|
41 pages, Latex. Typos corrected, references added, appendix added.
Sections enlarged with more examples and clarifying explanations. Minor
corrections in section 8. Results unchanged
|
JHEP 1209 (2012) 063
|
10.1007/JHEP09(2012)063
|
FPAUO-12/02
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The M-theory origin of the IIB gauged supergravities in nine dimensions,
classified according to the inequivalent classes of monodromy, is shown to
exactly corresponds to the global description of the supermembrane with central
charges. The global description is a realization of the sculpting mechanism of
gauging (arXiv:1107.3255) and it is associated to particular deformation of
fibrations. The supermembrane with central charges may be formulated in terms
of sections on symplectic torus bundles with SL(2,Z) monodromy. This global
formulation corresponds to the gauging of the abelian subgroups of SL(2,Z)
associated to monodromies acting on the target torus. We show the existence of
the trombone symmetry in the supermembrane formulated as a non-linear
realization of the SL(2,Z) symmetry and construct its gauging in terms of the
supermembrane formulated on an inequivalent class of symplectic torus
fibration. The supermembrane also exhibits invariance under T-duality and we
find the explicit T-duality transformation. It has a natural interpretation in
terms of the cohomology of the base manifold and the homology of the target
torus. We conjecture that this construction also holds for the IIA origin of
gauged supergravities in 9D such that the supermembrane becomes the origin of
all type II supergravities in 9D. The geometric structure of the symplectic
torus bundle goes beyond the classification on conjugated classes of SL(2,Z).
It depends on the elements of the coinvariant group associated to the monodromy
group. The possible values of the (p,q) charges on a given symplectic torus
bundle are restricted to the corresponding equivalence class defining the
element of the coinvariant group.
|
[{'version': 'v1', 'created': 'Tue, 13 Mar 2012 11:09:14 GMT'}
{'version': 'v2', 'created': 'Thu, 5 Jul 2012 16:14:39 GMT'}]
|
2012-10-25
|
[array(['del Moral', 'M. P. Garcia', ''], dtype=object)
array(['Pena', 'J. M.', ''], dtype=object)
array(['Restuccia', 'A.', ''], dtype=object)]
|
717 |
astro-ph/0603135
|
Berengere Parise
|
B. Parise, C. Ceccarelli, A.G.G.M. Tielens, A. Castets, E. Caux, B.
Lefloch, S. Maret
|
Testing grain surface chemistry : a survey of deuterated formaldehyde
and methanol in low-mass Class 0 protostars
|
21 pages, 12 figures, accepted by A&A
| null |
10.1051/0004-6361:20054476
| null |
astro-ph
| null |
Context : Despite the low cosmic abundance of deuterium (D/H ~ 1e-5), large
degrees of deuterium fractionation in molecules are observed in star forming
regions with enhancements that can reach 13 orders of magnitude, which current
models have difficulties to account for.
Aims : Multi-isotopologue observations are a very powerful constraint for
chemical models. The aim of our observations is to understand the processes
forming the observed large abundances of methanol and formaldehyde in low-mass
protostellar envelopes (gas-phase processes ? chemistry on the grain surfaces
?) and better constrain the chemical models. Methods : Using the IRAM 30m
single-dish telescope, we observed deuterated formaldehyde (HDCO and D2CO) and
methanol (CH2DOH, CH3OD, and CHD2OH) towards a sample of seven low-mass class 0
protostars. Using population diagrams, we then derive the fractionation ratios
of these species (abundance ratio between the deuterated molecule and its main
isotopologue) and compare them to the predictions of grain chemistry models.
Results : These protostars show a similar level of deuteration as in
IRAS16293-2422, where doubly-deuterated methanol -- and even triply-deuterated
methanol -- were first detected. Our observations point to the formation of
methanol on the grain surfaces, while formaldehyde formation cannot be fully
pined down. While none of the scenarii can be excluded (gas-phase or grain
chemistry formation), they both seem to require abstraction reactions to
reproduce the observed fractionations.
|
[{'version': 'v1', 'created': 'Mon, 6 Mar 2006 16:16:20 GMT'}]
|
2016-08-30
|
[array(['Parise', 'B.', ''], dtype=object)
array(['Ceccarelli', 'C.', ''], dtype=object)
array(['Tielens', 'A. G. G. M.', ''], dtype=object)
array(['Castets', 'A.', ''], dtype=object)
array(['Caux', 'E.', ''], dtype=object)
array(['Lefloch', 'B.', ''], dtype=object)
array(['Maret', 'S.', ''], dtype=object)]
|
718 |
1712.03611
|
Santiago Jos\'e Carreira
|
Santiago J. Carreira, Myriam H. Aguirre, Javier Briatico, Eugen
Weschke and Laura B. Steren
|
Tuning the Interfacial Charge, Orbital and Spin Polarization Properties
in La0.67Sr0.33MnO3/ La1-xSrxMnO3 Bilayers
|
17 pages and 3 figures
| null |
10.1063/1.5011172
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The possibility of controlling the interfacial properties of artificial oxide
heterostructures is still attracting researchers in the field of materials
engineering. Here, we used surface sensitive techniques and high-resolution
transmission electron microscopy to investigate the evolution of the surface
spin-polarization and lattice strains across the interfaces between
La0.66Sr0.33MnO3 thin films and low-doped manganites as capping layers. We have
been able to finely tune the interfacial spin-polarization by changing the
capping layer thickness and composition. The spin-polarization was found to be
highest at a critical capping thickness that depends on the Sr doping. We
explain the non-trivial magnetic profile by the combined effect of two
mechanisms. On one hand, the extra carriers supplied by the low-doped
manganites that tend to compensate the overdoped interface, favouring locally a
ferromagnetic double-exchange coupling. On the other hand, the evolution from a
tensile-strained structure of the inner layers to a compressed structure at the
surface that changes gradually the orbital occupation and hybridization of the
3d-Mn orbitals, being detrimental for the spin polarization. The finding of an
intrinsic spin-polarization at the A-site cation observed in XMCD measurements
reveals also the existence of a complex magnetic configuration at the
interface, different from the magnetic phases observed at the inner layers.
|
[{'version': 'v1', 'created': 'Sun, 10 Dec 2017 23:45:43 GMT'}]
|
2018-02-14
|
[array(['Carreira', 'Santiago J.', ''], dtype=object)
array(['Aguirre', 'Myriam H.', ''], dtype=object)
array(['Briatico', 'Javier', ''], dtype=object)
array(['Weschke', 'Eugen', ''], dtype=object)
array(['Steren', 'Laura B.', ''], dtype=object)]
|
719 |
astro-ph/0610873
|
Maria Diaz Trigo
|
M. Diaz Trigo, A. N. Parmar, J. Miller, E. Kuulkers and M. D.
Caballero-Garcia
|
XMM-Newton and INTEGRAL spectroscopy of the microquasar GRO J1655-40
during its 2005 outburst
|
Accepted for publication in A&A (submitted: 11 April 2006). 12 pages,
7 figures
| null |
10.1051/0004-6361:20065406
| null |
astro-ph
| null |
We report on two simultaneous XMM-Newton and INTEGRAL observations of the
microquasar GRO J1655-40 during the 2005 outburst when the source was in its
high-soft state. The 0.3-200 keV spectra are complex with an overall continuum
which may be modeled using an absorbed blackbody together with a weak, steep,
power-law component. In addition, there is evidence for the presence of both a
relativistically broadened Fe K line and a highly photo-ionized absorber. The
photo-ionized absorber is responsible for strong K absorption lines of Fe XXV
and Fe XXVI in the EPIC pn spectra and blue-shifted (v = -540 +/- 120 km/s) Ne
X and Fe XXIV features in the RGS spectra. The parameters of the photo-ionized
absorber were different during the two observations with the ionization
parameter, logxi, decreasing from 3.60 +/- 0.04 to 3.30 +/- 0.04 erg cm/s and
the column density decreasing from (5.2 +/- 1.0) x 10^22 atom cm-2 to (1.5 +/-
1.0) x 10^22 atom cm-2 during the first and second observations as the 0.5-200
keV GRO J1655-40 luminosity decreased by around a half. At 90% confidence the
INTEGRAL data show no evidence of a break in the power-law component up to
energies of 380 keV and 90 keV for the first and second observations,
respectively.
|
[{'version': 'v1', 'created': 'Mon, 30 Oct 2006 13:36:31 GMT'}]
|
2009-11-11
|
[array(['Trigo', 'M. Diaz', ''], dtype=object)
array(['Parmar', 'A. N.', ''], dtype=object)
array(['Miller', 'J.', ''], dtype=object)
array(['Kuulkers', 'E.', ''], dtype=object)
array(['Caballero-Garcia', 'M. D.', ''], dtype=object)]
|
720 |
2104.12738
|
Yuri Gomes
|
Y.M.P. Gomes
|
Dyson-Schwinger equation approach to Lorentz Symmetry Breaking with
finite temperature and chemical potential
|
Published version
|
Phys. Rev. D 104, 015022 (2021)
|
10.1103/PhysRevD.104.015022
| null |
hep-th hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
In this work, we investigate the dynamical breakdown of Lorentz symmetry in 4
dimensions by the condensation of a fermionic field described by a Dirac
Lagrangian with a four-fermion interaction. Using the Keldysh formalism we show
that the Lorentz symmetry breaking modifies the Dyson-Schwinger equations of
the fermionic propagator. We analyze the nonperturbative solutions for the
Dyson-Schwinger equations using the combination of the rainbow and quenched
approximations and show that, in equilibrium, the Lorentz symmetry breakdown
can occur in the strong coupling regime and new features arise from this
approach. Finally, we analyze the contributions of temperature and chemical
potential and find the respective phase diagram of the model and analyze the
dependence of the critical temperature and chemical potential as functions of
the coupling constant.
|
[{'version': 'v1', 'created': 'Mon, 26 Apr 2021 17:30:45 GMT'}
{'version': 'v2', 'created': 'Thu, 15 Jul 2021 18:09:55 GMT'}]
|
2021-07-21
|
[array(['Gomes', 'Y. M. P.', ''], dtype=object)]
|
721 |
quant-ph/0312224
|
Serge Reynaud
|
Serge Reynaud, Astrid Lambrecht, Cyriaque Genet
|
The Casimir force between real mirrors at non zero temperature
|
Contribution to the QFEXT'03 Conference, 8 pages, Rinton style
|
Quantum Field Theory Under the Influence of External Conditions,
ed. K.A.Milton (Rinton Press, 2004) p.36
| null | null |
quant-ph
| null |
The Casimir force between dissipative metallic mirrors at non zero
temperature has recently given rise to contradictory claims which have raised
doubts about the theoretical expression of the force. In order to contribute to
the resolution of this difficulty, we come back to the derivation of the force
from basic principles of the quantum theory of lossy optical cavities. We
obtain an expression which is valid for arbitrary mirrors, including
dissipative ones, characterized by frequency dependent reflection amplitudes.
|
[{'version': 'v1', 'created': 'Wed, 31 Dec 2003 10:19:40 GMT'}]
|
2007-05-23
|
[array(['Reynaud', 'Serge', ''], dtype=object)
array(['Lambrecht', 'Astrid', ''], dtype=object)
array(['Genet', 'Cyriaque', ''], dtype=object)]
|
722 |
1203.2517
|
Dariusz Graczyk
|
Dariusz Graczyk, Grzegorz Pietrzynski, Ian B. Thompson, Wolfgang
Gieren, Bogumil Pilecki, Andrzej Udalski, Igor Soszynski, Zbigniew
Kolaczkowski, Rolf-Peter Kudritzki, Fabio Bresolin, Piotr Konorski, Ronald
Mennickent, Dante Minniti, Jesper Storm, Nicolas Nardetto, Paulina Karczmarek
|
The araucaria project. An accurate distance to the late-type
double-lined eclipsing binary ogle smc113.3 4007 in the small magellanic
cloud
|
accepted in ApJ
| null |
10.1088/0004-637X/750/2/144
| null |
astro-ph.CO astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We have analyzed the long period, double-lined eclipsing binary system OGLE
SMC113.3 4007 (SC10 137844) in the SMC. The binary lies in the north-eastern
part of the galaxy and consists of two evolved, well detached, non-active G8
giants. The orbit is eccentric with e = 0.311 and the orbital period is 371.6
days. Using extensive high-resolution spectroscopic and multi-color photometric
data we have determined a true distance modulus of the system of m-M=18.83 +/-
0.02 (statistical) +/- 0.05 (systematic) mag using a surface brightness - color
relation for giant stars. This method is very insensitive to metallicity and
reddening corrections and depends only very little on stellar atmosphere model
assumptions. Additionally, we derived very accurate, at the level of 1%-2%,
physical parameters of both giant stars, particularly their masses and radii,
making our results important for comparison with stellar evolution models. Our
analysis underlines the high potential of late-type, double-lined detached
binary systems for accurate distance determinations to nearby galaxies.
|
[{'version': 'v1', 'created': 'Mon, 12 Mar 2012 15:27:26 GMT'}]
|
2015-06-04
|
[array(['Graczyk', 'Dariusz', ''], dtype=object)
array(['Pietrzynski', 'Grzegorz', ''], dtype=object)
array(['Thompson', 'Ian B.', ''], dtype=object)
array(['Gieren', 'Wolfgang', ''], dtype=object)
array(['Pilecki', 'Bogumil', ''], dtype=object)
array(['Udalski', 'Andrzej', ''], dtype=object)
array(['Soszynski', 'Igor', ''], dtype=object)
array(['Kolaczkowski', 'Zbigniew', ''], dtype=object)
array(['Kudritzki', 'Rolf-Peter', ''], dtype=object)
array(['Bresolin', 'Fabio', ''], dtype=object)
array(['Konorski', 'Piotr', ''], dtype=object)
array(['Mennickent', 'Ronald', ''], dtype=object)
array(['Minniti', 'Dante', ''], dtype=object)
array(['Storm', 'Jesper', ''], dtype=object)
array(['Nardetto', 'Nicolas', ''], dtype=object)
array(['Karczmarek', 'Paulina', ''], dtype=object)]
|
723 |
nlin/0106025
|
Grzegorz Litak
|
Grzegorz Litak (Technical University of Lublin)
|
Chaotic vibrations in a regenerative cutting process
|
7 pages, 3 figures
| null |
10.1016/S0960-0779(01)00176-X
| null |
nlin.CD
| null |
We have analyzed vibrations generated in an orthogonal cutting process. Using
a simple one degree of freedom model of the regenerative cutting we have
observed the complex behaviour of the system. In presence of a shaped cutting
surface, the nonlinear interaction between the tool and a worpiece leads to
chatter vibrations of periodic, quasi-periodic or chaotic type depending on
system parameters. To describe the profile of the surface machined by the first
pass we used a harmonic function. We analysed the impact phenomenon between the
tool and a workpiece after their contact loss.
|
[{'version': 'v1', 'created': 'Sat, 16 Jun 2001 16:43:47 GMT'}]
|
2015-06-26
|
[array(['Litak', 'Grzegorz', '', 'Technical University of Lublin'],
dtype=object) ]
|
724 |
physics/0607180
|
Giorgio Fagiolo
|
Giorgio Fagiolo, Mauro Napoletano and Andrea Roventini
|
How Do Output Growth Rate Distributions Look Like? Some Time-Series
Evidence on OECD Countries
| null | null | null | null |
physics.soc-ph q-fin.GN
| null |
This paper investigates the statistical properties of within-country GDP and
industrial production (IP) growth rate distributions. Many empirical
contributions have recently pointed out that cross-section growth rates of
firms, industries and countries all follow Laplace distributions. In this work,
we test whether also within-country, time-series GDP and IP growth rates can be
approximated by tent-shaped distributions. We fit output growth rates with the
exponential-power (Subbotin) family of densities, which includes as particular
cases both the Gaussian and the Laplace distributions. We find that, for a
large number of OECD countries including the U.S., both GDP and IP growth rates
are Laplace distributed. Moreover, we show that fat-tailed distributions
robustly emerge even after controlling for outliers, autocorrelation and
heteroscedasticity.
|
[{'version': 'v1', 'created': 'Thu, 20 Jul 2006 08:32:23 GMT'}]
|
2008-12-02
|
[array(['Fagiolo', 'Giorgio', ''], dtype=object)
array(['Napoletano', 'Mauro', ''], dtype=object)
array(['Roventini', 'Andrea', ''], dtype=object)]
|
725 |
2305.15436
|
Qasim Ajao
|
Qasim Ajao, Olukotun Oludamilare, and Lanre Sadeeq
|
Drivers of Mobile Payment Acceptance:The Impact of Network Externalities
in Nigeria
|
Nigeria, Smartphones, Network externalities, Mobile payment
acceptance, Emerging technology, UTAUT, Empirical study, Africa
| null |
10.4236/oalib.1110240
| null |
cs.CY cs.SI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The rising popularity of mobile payments can be attributed to the widespread
use of smartphones and their applications. Despite its potential to simplify
our lives, its adoption in African countries has been limited. This paper aims
to enhance our understanding of the critical factors that influence the
acceptance of mobile payments in Nigeria by exploring the impact of network
externalities in addition to conventional technology acceptance factors. It
posits that performance expectancy, effort expectancy, social influence, trust,
and network externality are the key drivers of mobile payment acceptance. The
research findings indicate that while traditional drivers still have an impact
on customer's willingness to adopt mobile payment, network externalities have
the strongest influence. The paper provides recommendations for future
research, although the results did not support the impact of effort expectancy.
|
[{'version': 'v1', 'created': 'Wed, 24 May 2023 19:10:33 GMT'}
{'version': 'v2', 'created': 'Wed, 14 Jun 2023 03:06:31 GMT'}
{'version': 'v3', 'created': 'Fri, 23 Jun 2023 21:56:46 GMT'}]
|
2023-06-27
|
[array(['Ajao', 'Qasim', ''], dtype=object)
array(['Oludamilare', 'Olukotun', ''], dtype=object)
array(['Sadeeq', 'Lanre', ''], dtype=object)]
|
726 |
1711.03026
|
Biswarup Bhattacharya
|
Biswarup Bhattacharya, Abhishek Sinha
|
Intelligent Fault Analysis in Electrical Power Grids
|
In proceedings of the 29th IEEE International Conference on Tools
with Artificial Intelligence (ICTAI) 2017 (full paper); 6 pages; 13 figures
| null |
10.1109/ICTAI.2017.00151
| null |
cs.SY cs.AI stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Power grids are one of the most important components of infrastructure in
today's world. Every nation is dependent on the security and stability of its
own power grid to provide electricity to the households and industries. A
malfunction of even a small part of a power grid can cause loss of
productivity, revenue and in some cases even life. Thus, it is imperative to
design a system which can detect the health of the power grid and take
protective measures accordingly even before a serious anomaly takes place. To
achieve this objective, we have set out to create an artificially intelligent
system which can analyze the grid information at any given time and determine
the health of the grid through the usage of sophisticated formal models and
novel machine learning techniques like recurrent neural networks. Our system
simulates grid conditions including stimuli like faults, generator output
fluctuations, load fluctuations using Siemens PSS/E software and this data is
trained using various classifiers like SVM, LSTM and subsequently tested. The
results are excellent with our methods giving very high accuracy for the data.
This model can easily be scaled to handle larger and more complex grid
architectures.
|
[{'version': 'v1', 'created': 'Wed, 8 Nov 2017 16:03:04 GMT'}]
|
2017-11-13
|
[array(['Bhattacharya', 'Biswarup', ''], dtype=object)
array(['Sinha', 'Abhishek', ''], dtype=object)]
|
727 |
1406.2737
|
Fred Cooper
|
Fred Cooper
|
Auxiliary Field Loop Expansion for the Effective Action for Stochastic
Partial Differential Equations I
|
16 Pages, 10
| null | null | null |
cond-mat.stat-mech physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Using a path integral formulation for correlation functions of stochastic
partial differential equations based on the Onsager-Machlup approach, we show
how, by introducing a composite auxiliary field one can generate an auxiliary
field loop expansion for the correlation functions which is similar to the one
used in the $1/N$ expansion for an $O(N)$ scalar quantum field theory. We apply
this formalism to the Kardar Parisi Zhang (KPZ) equation, and introduce the
composite field $\sigma = \frac{\lambda}{2} \nabla \phi \cdot \nabla \phi$ by
inserting a representation of the unit operator into the path integral which
enforces this constraint. In leading order we obtain a self-consistent mean
field approximation for the effective action similar to that used for the
Bardeen-Cooper-Schrieffer (BCS) and Bose-Einstein Condensate (BEC) theories of
dilute Fermi and Bose gases. This approximation, though related to a
self-consistent Gaussian approximation, preserves all symmetries and broken
symmetries. We derive the leading order in the auxiliary field (LOAF) effective
potential and compare our results to the one loop in the fluctuation strength
${\cal A}$ approximation. We find, contrary to what is found in the one loop
and self-consistent Gaussian approximation schemes that in the LOAF
approximation there is no fluctuation induced symmetry breaking as a function
of the coupling constant in any dimension $d$.
|
[{'version': 'v1', 'created': 'Tue, 10 Jun 2014 22:45:51 GMT'}]
|
2014-06-12
|
[array(['Cooper', 'Fred', ''], dtype=object)]
|
728 |
1410.5252
|
Rodrigo Hernandez
|
Rodrigo Hern\'andez and Mar\'ia J. Mart\'in
|
Criteria for univalence and quasiconformal extension of harmonic
mappings in terms of the Schwarzian DERIVATIVE
| null | null | null | null |
math.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove that if the Schwarzian norm of a given complex-valued locally
univalent harmonic mapping $f$ in the unit disk is small enough, then $f$ is,
indeed, globally univalent and can be extended to a quasiconformal mapping in
the extended complex plane.
|
[{'version': 'v1', 'created': 'Mon, 20 Oct 2014 12:52:22 GMT'}]
|
2014-10-21
|
[array(['Hernández', 'Rodrigo', ''], dtype=object)
array(['Martín', 'María J.', ''], dtype=object)]
|
729 |
0907.4423
|
Julien Barre
|
A. Olivetti, J. Barr\'e, B. Marcos, F. Bouchet, R. Kaiser
|
Breathing mode for systems of interacting particles
|
4 pages, 4 figures
| null |
10.1103/PhysRevLett.103.224301
| null |
cond-mat.other
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the breathing mode in systems of trapped interacting particles. Our
approach, based on a dynamical ansatz in the first equation of the
Bogolyubov-Born-Green-Kirkwood-Yvon (BBGKY) hierarchy allows us to tackle at
once a wide range of power law interactions and interaction strengths, at
linear and non linear levels. This both puts in a common framework various
results scattered in the literature, and by widely generalizing these,
emphasizes universal characters of this breathing mode. Our findings are
supported by direct numerical simulations.
|
[{'version': 'v1', 'created': 'Sat, 25 Jul 2009 13:36:16 GMT'}]
|
2015-05-13
|
[array(['Olivetti', 'A.', ''], dtype=object)
array(['Barré', 'J.', ''], dtype=object)
array(['Marcos', 'B.', ''], dtype=object)
array(['Bouchet', 'F.', ''], dtype=object)
array(['Kaiser', 'R.', ''], dtype=object)]
|
730 |
1005.0257
|
Takahiro Fuse
|
Takahiro Fuse and Yoshiaki Ono
|
First Order Bipolaronic Transition at Finite Temperature in the Holstein
Model
|
5 pages, 5 figures, J. Phys. Soc. Jpn. 79 (2010) 093702
| null |
10.1143/JPSJ.79.093702
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the Holstein model by using the dynamical mean-field theory
combined with the exact diagonalization method. Below a critical temperature
Tcr, a coexistence of the polaronic and the bipolaronic solutions is found for
the same value of the electron-phonon coupling $ in the range gc1(T)<g<gc2(T).
In the coexistence region, the system shows a first order phase transition from
the bipolaronic to the polaronic states as T decreases at T=Tp(<Tcr), where the
double occupancy and the lattice fluctuation together with the anharmonicity of
the effective ion potential change discontinuously without any symmetry
breaking. The obtained bipolaronic transition seems to be consistent with the
rattling transition in the beta-pyrochlore oxide KOs2O6.
|
[{'version': 'v1', 'created': 'Mon, 3 May 2010 11:28:21 GMT'}
{'version': 'v2', 'created': 'Thu, 5 Aug 2010 11:26:44 GMT'}
{'version': 'v3', 'created': 'Thu, 14 Oct 2010 12:42:01 GMT'}]
|
2015-05-18
|
[array(['Fuse', 'Takahiro', ''], dtype=object)
array(['Ono', 'Yoshiaki', ''], dtype=object)]
|
731 |
hep-ph/0103193
|
Oscar J. C. Dias
|
Oscar J. C. Dias, Jose' P. S. Lemos
|
False vacuum decay: effective one-loop action for pair creation of
domain walls
|
12 pages, Latex
|
J.Math.Phys. 42 (2001) 3292-3298
|
10.1063/1.1380442
|
DF/IST-3.2000
|
hep-ph gr-qc hep-th
| null |
An effective one-loop action built from the soliton field itself for the
two-dimensional (2D) problem of soliton pair creation is proposed. The action
consists of the usual mass term and a kinetic term in which the simple
derivative of the soliton field is replaced by a covariant derivative. In this
effective action the soliton charge is treated no longer as a topological
charge but as a Noether charge. Using this effective one-loop action, the
soliton-antisoliton pair production rate is calculated and one recovers Stone's
exponential factor and the prefactor of Kiselev, Selivanov and Voloshin. The
results are also valid straightforwardly to the problem of pair creation rate
of domain walls in dimensions greater than 2.
|
[{'version': 'v1', 'created': 'Sat, 17 Mar 2001 19:27:19 GMT'}
{'version': 'v2', 'created': 'Thu, 25 Oct 2001 12:25:44 GMT'}]
|
2009-11-07
|
[array(['Dias', 'Oscar J. C.', ''], dtype=object)
array(['Lemos', "Jose' P. S.", ''], dtype=object)]
|
732 |
1603.06671
|
Naritaka Oshita
|
Naritaka Oshita and Jun'ichi Yokoyama
|
Entropic interpretation of the Hawking-Moss bounce
|
4 pages, 1 figure
|
Prog. Theor. Exp. Phys. (2016) 051E02
|
10.1093/ptep/ptw053
|
RESCEU-14/16
|
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We revisit the derivation of the Hawking-Moss transition rate. Using the
static coordinates, we show that the Euclidean action is entirely determined by
the contribution of the entropy of de Sitter space which is proportional to the
surface area of the horizon. This holographic feature is common to any static
spacetime with a horizon on which the shift vector vanishes.
|
[{'version': 'v1', 'created': 'Tue, 22 Mar 2016 04:19:43 GMT'}]
|
2016-05-26
|
[array(['Oshita', 'Naritaka', ''], dtype=object)
array(['Yokoyama', "Jun'ichi", ''], dtype=object)]
|
733 |
1106.1249
|
Jeff Viaclovsky
|
Antonio Ache and Jeff Viaclovsky
|
Obstruction-flat asymptotically locally Euclidean metrics
|
43 pages; revised version to appear in Geometric and Functional
Analysis
| null | null | null |
math.DG math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that any asymptotically locally Euclidean (ALE) metric which is
obstruction-flat or extended obstruction-flat must be ALE of a certain optimal
order. Moreover, our proof applies to very general elliptic systems and in any
dimension $n \geq 3$. The proof is based on the technique of Cheeger-Tian for
Ricci-flat metrics. We also apply this method to obtain a singularity removal
theorem for (extended) obstruction-flat metrics with isolated $C^0$-orbifold
singular points.
|
[{'version': 'v1', 'created': 'Tue, 7 Jun 2011 02:19:35 GMT'}
{'version': 'v2', 'created': 'Mon, 10 Oct 2011 19:41:58 GMT'}]
|
2011-10-11
|
[array(['Ache', 'Antonio', ''], dtype=object)
array(['Viaclovsky', 'Jeff', ''], dtype=object)]
|
734 |
1303.0752
|
Daniel Mart\'in-de Blas
|
Daniel Mart\'in-de Blas, Mercedes Mart\'in-Benito, Guillermo A. Mena
Marug\'an
|
Inclusion of matter in inhomogeneous loop quantum cosmology
|
4 pages. Contribution to the Proceedings of Spanish Relativity
Meeting ERE2011, Madrid 2011
|
AIP Conf.Proc. 1458 (2011) 467-470
|
10.1063/1.4734461
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the hybrid quantization of the linearly polarized Gowdy $T^3$ model
with a massless scalar field with the same symmetries as the metric. For
simplicity, we quantize its restriction to the model with local rotational
symmetry. Using this hybrid approach, the homogeneous degrees of freedom of the
geometry are quantized \`a la loop, leading to the resolution of the
cosmological singularity. A Fock quantization is employed both for the matter
and the gravitational inhomogeneities. Owing to the inclusion of the massless
scalar field this system allows us to modelize flat Friedmann-Robertson-Walker
cosmologies filled with inhomogeneities propagating in one direction, providing
a perfect scenario to study the quantum back-reaction of the inhomogeneities on
the polymeric homogeneous and isotropic background.
|
[{'version': 'v1', 'created': 'Mon, 4 Mar 2013 16:53:13 GMT'}]
|
2013-03-05
|
[array(['Blas', 'Daniel Martín-de', ''], dtype=object)
array(['Martín-Benito', 'Mercedes', ''], dtype=object)
array(['Marugán', 'Guillermo A. Mena', ''], dtype=object)]
|
735 |
2102.13106
|
Zsigmond Tarcsay
|
Zsigmond Tarcsay
|
Maps preserving the Douglas solution of operator equations
|
7 pages
| null | null | null |
math.FA math.OA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider bijective maps $\phi$ on the full operator algebra
$\mathcal{B}(\mathcal{H})$ of an infinite dimensional Hilbert space with the
property that, for every $A,B,X\in \mathcal{B}(\mathcal{H})$, $X$ is the
Douglas solution of the equation $A=BX$ if and only if $Y=\phi(X)$ is the
Douglas solution of the equation $\phi(A)=\phi(B)Y$. We prove that those maps
are implemented by a unitary or anti-unitary map $U$, i.e., $\phi(A)=UAU^*$.
|
[{'version': 'v1', 'created': 'Thu, 25 Feb 2021 08:58:32 GMT'}]
|
2021-03-01
|
[array(['Tarcsay', 'Zsigmond', ''], dtype=object)]
|
736 |
2206.03171
|
Ramnath Kumar
|
Ramnath Kumar, Dheeraj Nagaraj
|
Introspective Experience Replay: Look Back When Surprised
| null | null | null | null |
cs.LG
|
http://creativecommons.org/licenses/by/4.0/
|
In reinforcement learning (RL), experience replay-based sampling techniques
play a crucial role in promoting convergence by eliminating spurious
correlations. However, widely used methods such as uniform experience replay
(UER) and prioritized experience replay (PER) have been shown to have
sub-optimal convergence and high seed sensitivity respectively. To address
these issues, we propose a novel approach called IntrospectiveExperience Replay
(IER) that selectively samples batches of data points prior to surprising
events. Our method builds upon the theoretically sound reverse experience
replay (RER) technique, which has been shown to reduce bias in the output of
Q-learning-type algorithms with linear function approximation. However, this
approach is not always practical or reliable when using neural function
approximation. Through empirical evaluations, we demonstrate that IER with
neural function approximation yields reliable and superior performance compared
toUER, PER, and hindsight experience replay (HER) across most tasks.
|
[{'version': 'v1', 'created': 'Tue, 7 Jun 2022 10:42:02 GMT'}
{'version': 'v2', 'created': 'Fri, 30 Sep 2022 09:56:24 GMT'}
{'version': 'v3', 'created': 'Tue, 22 Nov 2022 16:16:40 GMT'}
{'version': 'v4', 'created': 'Mon, 6 Feb 2023 06:08:12 GMT'}]
|
2023-02-07
|
[array(['Kumar', 'Ramnath', ''], dtype=object)
array(['Nagaraj', 'Dheeraj', ''], dtype=object)]
|
737 |
1701.05515
|
Kamal Soltanov N.
|
Kamal N. Soltanov
|
On some nonlinear equation from theory of the flows on networks
|
9p. arXiv admin note: substantial text overlap with arXiv:1612.00973
| null | null | null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Here we study the nonlinear hyperbolic equations of the type of equations
from theory of flows on networks, for which we prove the solvability theorem
under the appropriate conditions and also investigate the behaviour of the
solution.
|
[{'version': 'v1', 'created': 'Thu, 19 Jan 2017 17:19:06 GMT'}]
|
2017-01-20
|
[array(['Soltanov', 'Kamal N.', ''], dtype=object)]
|
738 |
1408.0854
|
Ross Adelman
|
Ross Adelman, Nail A. Gumerov, and Ramani Duraiswami
|
Semi-Analytical Computation of Acoustic Scattering by Spheroids and
Disks
| null | null |
10.1121/1.4901318
| null |
cs.MS cs.SD physics.comp-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Analytical solutions to acoustic scattering problems involving nonspherical
shapes, such as spheroids and disks, have long been known and have many
applications. However, these solutions require special functions that are not
easily computable. For this reason, their asymptotic forms are typically used
since they are more readily available. We explore these solutions and provide
computational software for calculating their nonasymptotic forms, which are
accurate over a wide range of frequencies and distances. This software, which
runs in MATLAB, computes the solutions to acoustic scattering problems
involving spheroids and disks by semi-analytical means, and is freely available
from our webpage.
|
[{'version': 'v1', 'created': 'Tue, 5 Aug 2014 03:18:28 GMT'}]
|
2015-06-22
|
[array(['Adelman', 'Ross', ''], dtype=object)
array(['Gumerov', 'Nail A.', ''], dtype=object)
array(['Duraiswami', 'Ramani', ''], dtype=object)]
|
739 |
1501.01573
|
Ola Mahmoud
|
Ola Mahmoud
|
The Temporal Dimension of Risk
| null | null | null | null |
q-fin.PM q-fin.RM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Multi-period measures of risk account for the path that the value of an
investment portfolio takes. In the context of probabilistic risk measures, the
focus has traditionally been on the magnitude of investment loss and not on the
dimension associated with the passage of time. In this paper, the concept of
temporal path-dependent risk measure is mathematically formalized to capture
the risk associated with the temporal dimension of a stochastic process. We
discuss the properties of temporal measures of risk and show that they can
never be coherent. We then study the temporal dimension of investment drawdown,
its duration, which measures the length of excursions below a running maximum.
Its properties in the context of risk measures are analyzed both theoretically
and empirically. In particular, we show that duration captures serial
correlation in the returns of two major asset classes. We conclude by
discussing the challenges of path-dependent temporal risk estimation in
practice.
|
[{'version': 'v1', 'created': 'Wed, 7 Jan 2015 17:47:42 GMT'}
{'version': 'v2', 'created': 'Mon, 13 Jul 2015 10:38:28 GMT'}
{'version': 'v3', 'created': 'Tue, 27 Oct 2015 14:40:40 GMT'}
{'version': 'v4', 'created': 'Mon, 27 Jun 2016 08:54:53 GMT'}]
|
2016-06-28
|
[array(['Mahmoud', 'Ola', ''], dtype=object)]
|
740 |
2110.06744
|
Zaid Alyafeai Mr
|
Zaid Alyafeai, Maraim Masoud, Mustafa Ghaleb and Maged S. Al-shaibani
|
Masader: Metadata Sourcing for Arabic Text and Speech Data Resources
| null | null | null | null |
cs.CL
|
http://creativecommons.org/licenses/by/4.0/
|
The NLP pipeline has evolved dramatically in the last few years. The first
step in the pipeline is to find suitable annotated datasets to evaluate the
tasks we are trying to solve. Unfortunately, most of the published datasets
lack metadata annotations that describe their attributes. Not to mention, the
absence of a public catalogue that indexes all the publicly available datasets
related to specific regions or languages. When we consider low-resource
dialectical languages, for example, this issue becomes more prominent. In this
paper we create \textit{Masader}, the largest public catalogue for Arabic NLP
datasets, which consists of 200 datasets annotated with 25 attributes.
Furthermore, We develop a metadata annotation strategy that could be extended
to other languages. We also make remarks and highlight some issues about the
current status of Arabic NLP datasets and suggest recommendations to address
them.
|
[{'version': 'v1', 'created': 'Wed, 13 Oct 2021 14:25:21 GMT'}]
|
2021-10-14
|
[array(['Alyafeai', 'Zaid', ''], dtype=object)
array(['Masoud', 'Maraim', ''], dtype=object)
array(['Ghaleb', 'Mustafa', ''], dtype=object)
array(['Al-shaibani', 'Maged S.', ''], dtype=object)]
|
741 |
2303.08669
|
Guangyi Liu
|
Guangyi Liu, Vivek Pandey, Christoforos Somarakis, Nader Motee
|
Cascading Waves of Fluctuation in Time-delay Multi-agent Rendezvous
|
Accepted at 2023 American Control Conference
| null | null | null |
eess.SY cs.SY
|
http://creativecommons.org/licenses/by/4.0/
|
We develop a framework to assess the risk of cascading failures when a team
of agents aims to rendezvous in time in the presence of exogenous noise and
communication time-delay. The notion of value-at-risk (VaR) measure is used to
evaluate the risk of cascading failures (i.e., waves of large fluctuations)
when agents have failed to rendezvous. Furthermore, an efficient explicit
formula is obtained to calculate the risk of higher-order cascading failures
recursively. Finally, from a risk-aware design perspective, we report an
evaluation of the most vulnerable sequence of agents in various communication
graphs.
|
[{'version': 'v1', 'created': 'Wed, 15 Mar 2023 14:55:46 GMT'}]
|
2023-03-16
|
[array(['Liu', 'Guangyi', ''], dtype=object)
array(['Pandey', 'Vivek', ''], dtype=object)
array(['Somarakis', 'Christoforos', ''], dtype=object)
array(['Motee', 'Nader', ''], dtype=object)]
|
742 |
2111.04422
|
Yaomin Dai
|
Jiahao Hao, Wenshan Hong, Xiaoxiang Zhou, Ying Xiang, Yaomin Dai, Huan
Yang, Shiliang Li, Huiqian Luo, and Hai-Hu Wen
|
Pseudogap and Strong Pairing Induced by Incipient and Shallow Bands in
the Quasi-Two-Dimensional KCa$_{2}$Fe$_{4}$As$_{4}$F$_{2}$
|
8 pages, 5 figures, Comments are welcome and appreciated
|
PhysRevB.106.014523 (2022)
|
10.1103/PhysRevB.106.014523
| null |
cond-mat.supr-con cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The optical properties of KCa$_{2}$Fe$_{4}$As$_{4}$F$_{2}$ (K12442, $T_c =
33.5$~K) and KCa$_{2}$(Fe$_{0.95}$Ni$_{0.05}$)$_{4}$As$_{4}$F$_{2}$ (Ni-K12442,
$T_c = 29$~K) have been examined at a large number of temperatures. For both
samples, a nodeless superconducting gap is clearly observed in the optical
conductivity at 5~K. The superconducting gap $\Delta \simeq 8.7$~meV
($2\Delta/k_{\text{B}}T_{c} \simeq 6.03$) in K12442, pointing towards
strong-coupling Cooper pairs, but in sharp contrast, $\Delta \simeq 4.6$~meV
($2\Delta/k_{\text{B}}T_{c} \simeq 3.68$) in Ni-K12442, which agrees with the
BCS weak-coupling pairing state. More intriguingly, below $T^{\ast} \simeq
75$~K, the optical conductivity of K12442 reveals a pseudogap that smoothly
evolves into the superconducting gap below $T_{c}$, while no such behavior is
detected in the electron-doped Ni-K12442. The comparison between the two
samples hints that the pseudogap and strong-coupling Cooper pairs in K12442 may
be intimately related to the shallow and incipient bands. We provide arguments
supporting a preformed pairing mechanism of the pseudogap, but at the moment a
magnetic scenario can not yet be excluded.
|
[{'version': 'v1', 'created': 'Mon, 8 Nov 2021 12:40:58 GMT'}
{'version': 'v2', 'created': 'Sun, 21 Aug 2022 04:49:32 GMT'}]
|
2022-08-23
|
[array(['Hao', 'Jiahao', ''], dtype=object)
array(['Hong', 'Wenshan', ''], dtype=object)
array(['Zhou', 'Xiaoxiang', ''], dtype=object)
array(['Xiang', 'Ying', ''], dtype=object)
array(['Dai', 'Yaomin', ''], dtype=object)
array(['Yang', 'Huan', ''], dtype=object)
array(['Li', 'Shiliang', ''], dtype=object)
array(['Luo', 'Huiqian', ''], dtype=object)
array(['Wen', 'Hai-Hu', ''], dtype=object)]
|
743 |
1810.01951
|
Dejan Brkic
|
Dejan Brkic and Pavel Praks
|
Unified Friction Formulation from Laminar to Fully Rough Turbulent Flow
|
13 pages, 10 figures, 1 table, 43 references
|
Brkic, D.; Praks, P. Unified Friction Formulation from Laminar to
Fully Rough Turbulent Flow. Applied Sciences 2018, 8(11), article no. 2036
|
10.3390/app8112036
| null |
physics.flu-dyn
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper gives a new unified formula for the Newtonian fluids valid for all
pipe flow regimes from laminar to the fully rough turbulent. It includes
laminar, unstable sharp jump from laminar to turbulent, and all types of the
turbulent regimes: smooth turbulent regime, partial non-fully developed
turbulent and fully developed rough turbulent regime. The formula follows the
inflectional form of curves as suggested in Nikuradse's experiment rather than
monotonic shape proposed by Colebrook and White. The composition of the
proposed unified formula consists of switching functions and of the
interchangeable formulas for laminar, smooth turbulent and fully rough
turbulent flow. The proposed switching functions provide a smooth and a
computationally cheap transition among hydraulic regimes. Thus, the here
presented formulation represents a coherent hydraulic model suitable for
engineering use. The model is compared to existing literature models, and shows
smooth and computationally cheap transitions among hydraulic regimes.
|
[{'version': 'v1', 'created': 'Mon, 1 Oct 2018 22:40:12 GMT'}]
|
2018-10-25
|
[array(['Brkic', 'Dejan', ''], dtype=object)
array(['Praks', 'Pavel', ''], dtype=object)]
|
744 |
1401.7472
|
Yaroslav M. Blanter
|
Marcin Dukalski and Yaroslav M. Blanter
|
Computable negativity in two mode squeezing subject to dissipation
|
11 pages
|
Phys. Rev. A 91, 033829 (2015)
|
10.1103/PhysRevA.91.033829
| null |
quant-ph cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study a system of two bosonic fields subject to two-mode squeezing in the
presence of dissipation. We find the Lie algebra governing the dynamics of the
problem and use the Wei-Norman method to determine the solutions. Using this
scheme we arrive at a closed form expression for an infinitely dimensional
density operator which we use to calculate the degree of entanglement
(quantified by Horodeckis' negativity) between the modes. We compare our result
to the known continuous variable entanglement measures. We analyse the
conditions for entanglement generation and the influence of thermal
environments on the state formed. The problem is relevant, in particular, for
understanding of quantum dynamics of coupled optical and/or mechanical modes in
optomechanical and nanomechanical systems.
|
[{'version': 'v1', 'created': 'Wed, 29 Jan 2014 11:05:17 GMT'}]
|
2015-04-01
|
[array(['Dukalski', 'Marcin', ''], dtype=object)
array(['Blanter', 'Yaroslav M.', ''], dtype=object)]
|
745 |
1205.0548
|
Tobias Basse
|
Tobias Basse, Ole Eggers Bjaelde, Steen Hannestad, Yvonne Y. Y. Wong
|
Confronting the sound speed of dark energy with future cluster surveys
|
24 pages, 7 figures, prepared for submission to JCAP
| null | null | null |
astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Future cluster surveys will observe galaxy clusters numbering in the hundred
thousands. We consider this work how these surveys can be used to constrain
dark energy parameters: in particular, the equation of state parameter w and
the non-adiabatic sound speed c_s^2. We demonstrate that, in combination with
Cosmic Microwave Background (CMB) observations from Planck, cluster surveys
such as that in the ESA Euclid project will be able to determine a
time-independent w with subpercent precision. Likewise, if the dark energy
sound horizon falls within the length scales probed by the cluster survey, then
c_s^2 can be pinned down to within an order of magnitude. In the course of this
work, we also investigate the process of dark energy virialisation in the
presence of an arbitrary sound speed. We find that dark energy clustering and
virialisation can lead to dark energy contributing to the total cluster mass at
approximately the 0.1% level at maximum.
|
[{'version': 'v1', 'created': 'Wed, 2 May 2012 20:00:02 GMT'}]
|
2012-05-04
|
[array(['Basse', 'Tobias', ''], dtype=object)
array(['Bjaelde', 'Ole Eggers', ''], dtype=object)
array(['Hannestad', 'Steen', ''], dtype=object)
array(['Wong', 'Yvonne Y. Y.', ''], dtype=object)]
|
746 |
1703.07153
|
Guangwei Li
|
Guang-Wei Li, Brian Yanny, Hao-Tong Zhang, Zong-rui Bai, Yue Wu,
Yi-qiao Dong, Ya-juan Lei, Hai-long Yuan, Yong-Hui Hou, Yue-Fei Wang and Yong
Zhang
|
Candidate members of the Pal 5, GD-1, Cetus Polar, and Orphan tidal
stellar halo streams from Sdss DR9, Lamost DR3 and APOGEE catalogues
|
17pages, 19 figures, 3 tables
| null |
10.1088/1674-4527/17/6/62
| null |
astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present candidate members of the Pal 5, GD-1, Cetus Polar, and Orphan
tidal stellar streams found in LAMOST DR3, SDSS DR9 and APOGEE catalogs. In
LAMOST DR3, we find 20, 4, 24 high confidence candidates of tidal streams GD-1,
Cetus Polar and Orphan respectively. We also list from the SDSS DR9
spectroscopic catalog 59, 118, 10 high confidence candidates of tidal streams
Cetus Polar, Orphan and Pal 5, respectively. Furthermore, we find 7 high
confidence candidates of the Pal 5 tidal stream in APOGEE data. Compared with
SDSS, the new candidates from LAMOST DR3 are brighter, so that together, more
of the color-magnitude diagram, including the giant branch can be explored.
Analysis of SDSS data shows that there are 3 metallicity peaks of the Orphan
stream and also shows some spatial separation. LAMOST data confirms multiple
metallicities in this stream. The metallicity, given by the higher resolution
APOGEE instrument, of the Pal 5 tidal stream is [Fe/H] $\sim -1.2$, higher than
that given earlier by SDSS spectra. Many previously unidentified stream members
are tabulated here for the first time, along with existing members, allowing
future researchers to further constrain the orbits of these objects as they
move within the Galaxy's dark matter potential.
|
[{'version': 'v1', 'created': 'Tue, 21 Mar 2017 11:25:03 GMT'}]
|
2017-06-14
|
[array(['Li', 'Guang-Wei', ''], dtype=object)
array(['Yanny', 'Brian', ''], dtype=object)
array(['Zhang', 'Hao-Tong', ''], dtype=object)
array(['Bai', 'Zong-rui', ''], dtype=object)
array(['Wu', 'Yue', ''], dtype=object)
array(['Dong', 'Yi-qiao', ''], dtype=object)
array(['Lei', 'Ya-juan', ''], dtype=object)
array(['Yuan', 'Hai-long', ''], dtype=object)
array(['Hou', 'Yong-Hui', ''], dtype=object)
array(['Wang', 'Yue-Fei', ''], dtype=object)
array(['Zhang', 'Yong', ''], dtype=object)]
|
747 |
2108.10964
|
Ramin Ayanzadeh
|
Ramin Ayanzadeh, Poulami Das, Swamit S. Tannu and Moinuddin Qureshi
|
EQUAL: Improving the Fidelity of Quantum Annealers by Injecting
Controlled Perturbations
| null | null | null | null |
quant-ph cs.AR cs.ET
|
http://creativecommons.org/licenses/by/4.0/
|
Quantum computing is an information processing paradigm that uses
quantum-mechanical properties to speedup computationally hard problems.
Although promising, existing gate-based quantum computers consist of only a few
dozen qubits and are not large enough for most applications. On the other hand,
existing QAs with few thousand of qubits have the potential to solve some
domain-specific optimization problems. QAs are single instruction machines and
to execute a program, the problem is cast to a Hamiltonian, embedded on the
hardware, and a single quantum machine instruction (QMI) is run. Unfortunately,
noise and imperfections in hardware result in sub-optimal solutions on QAs even
if the QMI is run for thousands of trials.
The limited programmability of QAs mean that the user executes the same QMI
for all trials. This subjects all trials to a similar noise profile throughout
the execution, resulting in a systematic bias. We observe that systematic bias
leads to sub-optimal solutions and cannot be alleviated by executing more
trials or using existing error-mitigation schemes. To address this challenge,
we propose EQUAL (Ensemble Quantum Annealing). EQUAL generates an ensemble of
QMIs by adding controlled perturbations to the program QMI. When executed on
the QA, the ensemble of QMIs steers the program away from encountering the same
bias during all trials and thus, improves the quality of solutions. Our
evaluations using the 2041-qubit D-Wave QA show that EQUAL bridges the
difference between the baseline and the ideal by an average of 14% (and up to
26%), without requiring any additional trials. EQUAL can be combined with
existing error mitigation schemes to further bridge the difference between the
baseline and ideal by an average of 55% (and up to 68%).
|
[{'version': 'v1', 'created': 'Tue, 24 Aug 2021 21:29:59 GMT'}]
|
2021-08-26
|
[array(['Ayanzadeh', 'Ramin', ''], dtype=object)
array(['Das', 'Poulami', ''], dtype=object)
array(['Tannu', 'Swamit S.', ''], dtype=object)
array(['Qureshi', 'Moinuddin', ''], dtype=object)]
|
748 |
0809.1034
|
Misha Katsnelson
|
M. I. Katsnelson
|
Optical properties of graphene: the Fermi liquid approach
|
3 pages
|
Europhys. Lett. 84, 37001 (2008)
|
10.1209/0295-5075/84/37001
| null |
cond-mat.mes-hall cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Optical properties of two-dimensional massless Dirac fermions are considered
by the formalism of pseudospin precession equations which provides an easy and
natural semiphenomenological way to include correlation effects. It is shown
that the latter are negligible, with the only assumption that the system under
consideration is normal Fermi liquid. This result probably explains recent
experimental data on the universal optical conductivity of graphene (Nair R. R.
et al, Science 320 (2008) 1308).
|
[{'version': 'v1', 'created': 'Fri, 5 Sep 2008 14:05:17 GMT'}]
|
2008-10-24
|
[array(['Katsnelson', 'M. I.', ''], dtype=object)]
|
749 |
1910.03770
|
Aaron Lauda
|
Aaron D. Lauda, Andrew Manion
|
Ozsvath-Szabo bordered algebras and subquotients of category O
|
36 pages, tikz diagrams
|
Advances in Mathematics, Volume 376, 6 January 2021
|
10.1016/j.aim.2020.107455
| null |
math.QA math.GT math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We show that Ozsv\'ath-Szab\'o's bordered algebra used to efficiently compute
knot Floer homology is a graded flat deformation of the regular block of a
$\mathfrak{q}$-presentable quotient of parabolic category $\mathcal{O}$. We
identify the endomorphism algebra of a minimal projective generator for this
block with an explicit quotient of the Ozsv\'ath-Szab\'o algebra using
Sartori's diagrammatic formulation of the endomorphism algebra. Both of these
algebras give rise to categorifications of tensor products of the vector
representation $V^{\otimes n}$ for $U_q(\mathfrak{gl}(1|1))$. Our isomorphism
allows us to transport a number of constructions between these two algebras,
leading to a new (fully) diagrammatic reinterpretation of Sartori's algebra,
new modules over Ozsv\'ath-Szab\'o's algebra lifting various bases of
$V^{\otimes n}$, and bimodules over Ozsv\'ath-Szab\'o's algebra categorifying
the action of the quantum group element $F$ and its dual on $V^{\otimes n}$.
|
[{'version': 'v1', 'created': 'Wed, 9 Oct 2019 03:14:53 GMT'}]
|
2020-12-01
|
[array(['Lauda', 'Aaron D.', ''], dtype=object)
array(['Manion', 'Andrew', ''], dtype=object)]
|
750 |
0801.1020
|
Thomas Archer
|
Thomas Archer, Ruairi Hanafin and Stefano Sanvito
|
Magnetism of CoO polymorphs
| null | null | null | null |
cond-mat.other
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A microscopic explanation for the room temperature ferromagnetism in diluted
ZnO:Co is at present rather elusive. Although standard secondary phases can
usually be ruled out, it is less clear whether regions with high Co
concentration coexist with undoped portions of the film, i.e. whether some form
of CoO polymorph can be responsible for the magnetic signal. Since X-ray
usually excludes the presence of the native rock-salt phase, the study of CoO
polymorphs becomes particularly interesting. In this work we investigate
theoretically the magnetism of CoO in both the wurtzite and zincblende phases.
By using a combination of density functional theory with the LDA+$U$
approximation and Monte Carlo simulations we demonstrate that wurtzite and
zincblende CoO have a complex frustrated anti-ferromagnetic ground state with
no net magnetic moment in the bulk. Most importantly the estimated critical
temperatures are well below room temperature for both cases. This suggests that
bulk CoO polymorphs are not responsible for the room temperature magnetism
observed for ZnO:Co, although the role of clusters with uncompensated spins or
arranged in a spinodal decomposed structure still remains an open question.
|
[{'version': 'v1', 'created': 'Mon, 7 Jan 2008 15:33:58 GMT'}
{'version': 'v2', 'created': 'Tue, 1 Jul 2008 12:58:53 GMT'}]
|
2008-07-01
|
[array(['Archer', 'Thomas', ''], dtype=object)
array(['Hanafin', 'Ruairi', ''], dtype=object)
array(['Sanvito', 'Stefano', ''], dtype=object)]
|
751 |
1712.06238
|
Antoine Song
|
Fernando C. Marques, Andr\'e Neves, Antoine Song
|
Equidistribution of minimal hypersurfaces for generic metrics
|
References have been added. Final version to appear in Inventiones
Mathematicae
| null | null | null |
math.DG math.AP math.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
For almost all Riemannian metrics (in the $C^\infty$ Baire sense) on a closed
manifold $M^{n+1}$, $3\leq (n+1)\leq 7$, we prove that there is a sequence of
closed, smooth, embedded, connected minimal hypersurfaces that is
equidistributed in $M$.
This gives a quantitative version of the main result of
\cite{irie-marques-neves}, by Irie and the first two authors, that established
denseness of minimal hypersurfaces for generic metrics. As in
\cite{irie-marques-neves}, the main tool is the Weyl Law for the Volume
Spectrum proven by Liokumovich and the first two authors in
\cite{liokumovich-marques-neves}.
|
[{'version': 'v1', 'created': 'Mon, 18 Dec 2017 03:21:47 GMT'}
{'version': 'v2', 'created': 'Mon, 24 Dec 2018 00:46:24 GMT'}]
|
2018-12-27
|
[array(['Marques', 'Fernando C.', ''], dtype=object)
array(['Neves', 'André', ''], dtype=object)
array(['Song', 'Antoine', ''], dtype=object)]
|
752 |
1805.00022
|
Bartomeu Monserrat
|
Bartomeu Monserrat, Ji-Sang Park, Sunghyun Kim, Aron Walsh
|
Role of electron-phonon coupling and thermal expansion on band gaps,
carrier mobility, and interfacial offsets in kesterite thin-film solar cells
|
5 pages, 3 figures, includes supplementary material
|
Appl. Phys. Lett. 112, 193903 (2018)
|
10.1063/1.5028186
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The efficiencies of solar cells based on kesterite Cu$_2$ZnSnS$_4$ (CZTS) and
Cu$_2$ZnSnSe$_4$ (CZTSe) are limited by a low open-circuit voltage due to high
rates of non-radiative electron-hole recombination. To probe the origin of this
bottleneck, we calculate the band offset of CZTS(Se) with CdS, confirming a
weak spike of 0.1 eV for CZTS/wurtzite-CdS and a strong spike of 0.4 eV for
CZTSe/wurtzite-CdS. We also consider the effects of temperature on the band
alignment, finding that increasing temperature significantly enhances the
spike-type offset. We further resolve an outstanding discrepancy between
measured and calculated phonon frequencies for the kesterites, and use these to
estimate the upper limit of electron and hole mobilities based on optic phonon
Fr\"ohlich scattering, which uncovers an intrinsic asymmetry with faster
(minority carrier) electron mobility.
|
[{'version': 'v1', 'created': 'Mon, 30 Apr 2018 18:00:01 GMT'}]
|
2018-05-11
|
[array(['Monserrat', 'Bartomeu', ''], dtype=object)
array(['Park', 'Ji-Sang', ''], dtype=object)
array(['Kim', 'Sunghyun', ''], dtype=object)
array(['Walsh', 'Aron', ''], dtype=object)]
|
753 |
hep-th/0003066
|
Hisaaki Shinkai
|
Hisa-aki Shinkai and Tetsuya Shiromizu
|
Fate of Kaluza-Klein Bubble
|
13 pages including 10 figures, RevTeX, epsf.sty. CGPG-99/12-8,
RESCEU-6/00 and DAMTP-2000-30. To appear in Phys. Rev. D
|
Phys.Rev. D62 (2000) 024010
|
10.1103/PhysRevD.62.024010
| null |
hep-th astro-ph gr-qc
| null |
We numerically study classical time evolutions of Kaluza-Klein bubble
space-time which has negative energy after a decay of vacuum. As the zero
energy Witten's bubble space-time, where the bubble expands infinitely, the
subsequent evolutions of Brill and Horowitz's momentarily static initial data
show that the bubble will expand in terms of the area. At first glance, this
result may support Corley and Jacobson's conjecture that the bubble will expand
forever as well as the Witten's bubble. The irregular signatures, however, can
be seen in the behavior of the lapse function in the maximal slicing gauge and
the divergence of the Kretchman invariant. Since there is no appearance of the
apparent horizon, we suspect an appearance of a naked singularity as the final
fate of this space-time.
|
[{'version': 'v1', 'created': 'Wed, 8 Mar 2000 20:42:42 GMT'}]
|
2009-10-31
|
[array(['Shinkai', 'Hisa-aki', ''], dtype=object)
array(['Shiromizu', 'Tetsuya', ''], dtype=object)]
|
754 |
cond-mat/0104220
|
Jun Koide
|
J. Koide
|
Kinetic-Theoretic Description based on Closed-Time-Path Formalism
|
11 pages, 20 figures
| null | null | null |
cond-mat.stat-mech
| null |
Utilizing a non-equilibrium Green function like the generalized Kadanoff-Baym
ansatz, a systematic perturbative method is presented to calculate the
expectation value of an arbitrary physical quantity under the restriction that
the Wigner distribution function is fixed. It is shown that, in the
diagrammatic expression of the quantity, a certain part of contributions can be
eliminated due to the restriction. Together with the quantum kinetic equation,
this method provides a basis for the kinetic-theoretical description.
|
[{'version': 'v1', 'created': 'Thu, 12 Apr 2001 09:09:47 GMT'}]
|
2007-05-23
|
[array(['Koide', 'J.', ''], dtype=object)]
|
755 |
2004.05676
|
Chinmoy Samanta
|
Chinmoy Samanta and Aniruddha Chakraborty
|
Reaction-diffusion dynamics through a Gaussian sink in the presence of
an attractive stepwise linear potential energy curve
| null | null |
10.1140/epjp/s13360-021-01524-7
| null |
physics.chem-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the present report, we have introduced the Fredholm integral method to
solve the Smoluchowski equation in the Laplace domain. We get an exact
semi-analytical solution for the linear potential energy curve in the dynamic
diffusion process, and the survival probability is calculated by the numerical
inverse Laplace transform method. We apply our method in two different physical
contexts for finding different observable like average rate constant in
electronic relaxation in solution and quantum yields in a photosynthetic system
or doped molecular crystal.
|
[{'version': 'v1', 'created': 'Sun, 12 Apr 2020 18:59:29 GMT'}]
|
2021-09-03
|
[array(['Samanta', 'Chinmoy', ''], dtype=object)
array(['Chakraborty', 'Aniruddha', ''], dtype=object)]
|
756 |
1911.01607
|
Inez Maria Zwetsloot
|
Inez Maria Zwetsloot, Tahir Mahmood and William H. Woodall
|
Multivariate Time-Between-Events Monitoring -- An overview and some
(overlooked) underlying complexities
| null | null | null | null |
stat.AP stat.OT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We review methods for monitoring multivariate time-between-events (TBE) data.
We present some underlying complexities that have been overlooked in the
literature. It is helpful to classify multivariate TBE monitoring applications
into two fundamentally different scenarios. One scenario involves monitoring
individual vectors of TBE data. The other involves the monitoring of several,
possibly correlated, temporal point processes in which events could occur at
different rates. We discuss performance measures and advise the use of
time-between-signal based metrics for the design and comparison of methods. We
re-evaluate an existing multivariate TBE monitoring method, offer some advice
and some directions for future research.
|
[{'version': 'v1', 'created': 'Tue, 5 Nov 2019 04:01:55 GMT'}]
|
2019-11-06
|
[array(['Zwetsloot', 'Inez Maria', ''], dtype=object)
array(['Mahmood', 'Tahir', ''], dtype=object)
array(['Woodall', 'William H.', ''], dtype=object)]
|
757 |
1010.4720
|
E. Khan
|
J.-P. Ebran, E. Khan, D. Pena Arteaga, D. Vretenar
|
Relativistic Hartree-Fock-Bogoliubov model for deformed nuclei
|
13 pages, 11 figures
|
Phys.Rev.C83:064323,2011
|
10.1103/PhysRevC.83.064323
| null |
nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Relativistic Hartree-Fock-Bogoliubov model for axially deformed nuclei
(RHFBz) is introduced. The model is based on an effective Lagrangian with
density-dependent meson-nucleon couplings in the particle-hole channel, and the
pairing part of the Gogny force is used in the pairing channel. The RHFBz
quasiparticle equations are solved by expansion in the basis of a deformed
harmonic oscillator. Illustrative RHFBz calculations are performed for Carbon,
Neon and Magnesium isotopes. The effect of the explicitly including the pion
field is investigated for binding energies, deformation parameters, and charge
radii.
|
[{'version': 'v1', 'created': 'Fri, 22 Oct 2010 14:09:25 GMT'}
{'version': 'v2', 'created': 'Wed, 27 Jul 2011 17:44:18 GMT'}]
|
2011-08-02
|
[array(['Ebran', 'J. -P.', ''], dtype=object)
array(['Khan', 'E.', ''], dtype=object)
array(['Arteaga', 'D. Pena', ''], dtype=object)
array(['Vretenar', 'D.', ''], dtype=object)]
|
758 |
2204.06822
|
Andrea Castellani
|
Andrea Castellani, Sebastian Schmitt, Barbara Hammer
|
Stream-based Active Learning with Verification Latency in Non-stationary
Environments
|
ENNS Best Paper Award at ICANN 2022
| null |
10.1007/978-3-031-15937-4_22
| null |
cs.LG cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
Data stream classification is an important problem in the field of machine
learning. Due to the non-stationary nature of the data where the underlying
distribution changes over time (concept drift), the model needs to continuously
adapt to new data statistics. Stream-based Active Learning (AL) approaches
address this problem by interactively querying a human expert to provide new
data labels for the most recent samples, within a limited budget. Existing AL
strategies assume that labels are immediately available, while in a real-world
scenario the expert requires time to provide a queried label (verification
latency), and by the time the requested labels arrive they may not be relevant
anymore. In this article, we investigate the influence of finite,
time-variable, and unknown verification delay, in the presence of concept drift
on AL approaches. We propose PRopagate (PR), a latency independent utility
estimator which also predicts the requested, but not yet known, labels.
Furthermore, we propose a drift-dependent dynamic budget strategy, which uses a
variable distribution of the labelling budget over time, after a detected
drift. Thorough experimental evaluation, with both synthetic and real-world
non-stationary datasets, and different settings of verification latency and
budget are conducted and analyzed. We empirically show that the proposed method
consistently outperforms the state-of-the-art. Additionally, we demonstrate
that with variable budget allocation in time, it is possible to boost the
performance of AL strategies, without increasing the overall labeling budget.
|
[{'version': 'v1', 'created': 'Thu, 14 Apr 2022 08:51:15 GMT'}
{'version': 'v2', 'created': 'Mon, 12 Sep 2022 11:53:36 GMT'}]
|
2022-09-13
|
[array(['Castellani', 'Andrea', ''], dtype=object)
array(['Schmitt', 'Sebastian', ''], dtype=object)
array(['Hammer', 'Barbara', ''], dtype=object)]
|
759 |
2103.05761
|
Mark Stamp
|
Samanvitha Basole and Mark Stamp
|
Cluster Analysis of Malware Family Relationships
| null | null | null | null |
cs.CR cs.LG
|
http://creativecommons.org/licenses/by/4.0/
|
In this paper, we use $K$-means clustering to analyze various relationships
between malware samples. We consider a dataset comprising~20 malware families
with~1000 samples per family. These families can be categorized into seven
different types of malware. We perform clustering based on pairs of families
and use the results to determine relationships between families. We perform a
similar cluster analysis based on malware type. Our results indicate that
$K$-means clustering can be a powerful tool for data exploration of malware
family relationships.
|
[{'version': 'v1', 'created': 'Sun, 7 Mar 2021 14:51:01 GMT'}]
|
2021-03-11
|
[array(['Basole', 'Samanvitha', ''], dtype=object)
array(['Stamp', 'Mark', ''], dtype=object)]
|
760 |
1503.05369
|
Matthew R. Bate
|
Matthew R. Bate and Eric R. Keto
|
Combining radiative transfer and diffuse interstellar medium physics to
model star formation
|
Accepted for publication in MNRAS, 25 pages, 22 figures
| null |
10.1093/mnras/stv451
| null |
astro-ph.SR astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a method for modelling star-forming clouds that combines two
different models of the thermal evolution of the interstellar medium (ISM). In
the combined model, where the densities are low enough that at least some part
of the spectrum is optically thin, a model of the thermodynamics of the diffuse
ISM is more significant in setting the temperatures. Where the densities are
high enough to be optically thick across the spectrum, a model of flux limited
diffusion is more appropriate. Previous methods either model the low-density
interstellar medium and ignore the thermal behaviour at high densities (e.g.
inside collapsing molecular cloud cores), or model the thermal behaviour near
protostars but assume a fixed background temperature (e.g. approximately 10 K)
on large-scales. Our new method treats both regimes. It also captures the
different thermal evolution of the gas, dust, and radiation separately. We
compare our results with those from the literature, and investigate the
dependence of the thermal behaviour of the gas on the various model parameters.
This new method should allow us to model the ISM across a wide range of
densities and, thus, develop a more complete and consistent understanding of
the role of thermodynamics in the star formation process.
|
[{'version': 'v1', 'created': 'Wed, 18 Mar 2015 12:28:29 GMT'}]
|
2015-03-19
|
[array(['Bate', 'Matthew R.', ''], dtype=object)
array(['Keto', 'Eric R.', ''], dtype=object)]
|
761 |
math/0509075
|
Milen Yakimov
|
K. R. Goodearl and M. Yakimov
|
Poisson structures on affine spaces and flag varieties. II. General case
|
31 pages
| null | null | null |
math.QA math.RT
| null |
The standard Poisson structures on the flag varieties G/P of a complex
reductive algebraic group G are investigated. It is shown that the orbits of
symplectic leaves in G/P under a fixed maximal torus of G are smooth
irreducible locally closed subvarieties of G/P, isomorphic to intersections of
dual Schubert cells in the full flag variety G/B of G, and their Zariski
closures are explicitly computed. Two different proofs of the former result are
presented. The first is in the framework of Poisson homogeneous spaces and the
second one uses an idea of weak splittings of surjective Poisson submersions,
based on the notion of Poisson--Dirac submanifolds. For a parabolic subgroup P
with abelian unipotent radical (in which case G/P is a Hermitian symmetric
space of compact type), it is shown that all orbits of the standard Levi factor
L of P on G/P are complete Poisson subvarieties which are quotients of L,
equipped with the standard Poisson structure. Moreover, it is proved that the
Poisson structure on G/P vanishes at all special base points for the L-orbits
on G/P constructed by Richardson, R\"ohrle, and Steinberg.
|
[{'version': 'v1', 'created': 'Sun, 4 Sep 2005 07:47:26 GMT'}
{'version': 'v2', 'created': 'Fri, 28 Oct 2005 21:02:56 GMT'}]
|
2007-05-23
|
[array(['Goodearl', 'K. R.', ''], dtype=object)
array(['Yakimov', 'M.', ''], dtype=object)]
|
762 |
1204.1000
|
Pradipta Ghosh
|
Joydeep Chakrabortty, Pradipta Ghosh, Werner Rodejohann
|
Lower Limits on $\mu \to e \gamma$ from new Measurements on $U_{e3}$
|
9 pages, 4 .eps figures; Discussions, 2 new figures and references
added, Abstract and text modified, matches with the published version in
Physical Review D
|
Phys. Rev. D 86, 075020 (2012)
|
10.1103/PhysRevD.86.075020
|
FTUAM-12-88; IFT-UAM/CSIC-12-29
|
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
New data on the lepton mixing angle $\theta_{13}$ imply that the $e\mu$
element of the matrix $m_\nu m_\nu^\dagger$, where $m_\nu$ is the neutrino
Majorana mass matrix, cannot vanish. This implies a lower limit on lepton
flavor violating processes in the $e\mu$ sector in a variety of frameworks,
including Higgs triplet models or the concept of minimal flavor violation in
the lepton sector. We illustrate this for the branching ratio of $\mu \to e
\gamma$ in the type II seesaw mechanism, in which a Higgs triplet is
responsible for neutrino mass and also mediates lepton flavor violation. We
also discuss processes like $\mu\to e\bar{e}e$ and $\mu\to e$ conversion in
nuclei. Since these processes have sensitivity on the individual entries of
$m_\nu$, their rates can still be vanishingly small.
|
[{'version': 'v1', 'created': 'Wed, 4 Apr 2012 17:05:07 GMT'}
{'version': 'v2', 'created': 'Fri, 19 Oct 2012 13:33:49 GMT'}]
|
2012-10-22
|
[array(['Chakrabortty', 'Joydeep', ''], dtype=object)
array(['Ghosh', 'Pradipta', ''], dtype=object)
array(['Rodejohann', 'Werner', ''], dtype=object)]
|
763 |
1209.0224
|
Andrei Belitsky
|
A. V. Belitsky, S. Caron-Huot
|
Superpropagator and superconformal invariants
|
8 pages, 3 figures
| null |
10.1016/j.physletb.2012.11.018
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We construct a superpropagator in maximally supersymmetric Yang-Mills theory
which is invariant off-shell under a chiral half of supersymmetries. Motivated
by the duality with scattering amplitudes in this theory, we apply this
superpropagator to supersymmeytric Wilson loop on polygonal contours. By
performing explicit one-loop calculations we confirm the absence of anomalies
and verify the duality between the object under study and NMHV amplitudes.
|
[{'version': 'v1', 'created': 'Mon, 3 Sep 2012 00:28:54 GMT'}]
|
2015-06-11
|
[array(['Belitsky', 'A. V.', ''], dtype=object)
array(['Caron-Huot', 'S.', ''], dtype=object)]
|
764 |
1303.2283
|
Xiyong Zhang
|
Xiyong Zhang and Rongquan Feng and Qunying Liao and Xuhong Gao
|
Finding normal bases over finite fields with prescribed trace
self-orthogonal relations
| null | null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Normal bases and self-dual normal bases over finite fields have been found to
be very useful in many fast arithmetic computations. It is well-known that
there exists a self-dual normal basis of $\mathbb{F}_{2^n}$ over $\mathbb{F}_2$
if and only if $4\nmid n$. In this paper, we prove there exists a normal
element $\alpha$ of $\mathbb{F}_{2^n}$ over $\mathbb{F}_{2}$ corresponding to a
prescribed vector $a=(a_0,a_1,...,a_{n-1})\in \mathbb{F}_2^n$ such that
$a_i={Tr}_{2^n|2}(\alpha^{1+2^i})$ for $0\leq i\leq n-1$, where $n$ is a
2-power or odd, if and only if the given vector $a$ is symmetric ($a_i=a_{n-i}$
for all $i, 1\leq i\leq n-1$), and one of the following is true.
1) $n=2^s\geq 4$, $a_0=1$, $a_{n/2}=0$, $\sum\limits_{1\leq i\leq n/2-1,
(i,2)=1}a_i=1$;
2) $n$ is odd, $(\sum\limits_{0\leq i\leq n-1}a_ix^i,x^n-1)=1$.
Furthermore we give an algorithm to obtain normal elements corresponding to
prescribed vectors in the above two cases. For a general positive integer $n$
with $4|n$, some necessary conditions for a vector to be the corresponding
vector of a normal element of $\mathbb{F}_{2^n}$ over $\mathbb{F}_{2}$ are
given. And for all $n$ with $4|n$, we prove that there exists a normal element
of $\mathbb{F}_{2^n}$ over $\mathbb{F}_2$ such that the Hamming weight of its
corresponding vector is 3, which is the lowest possible Hamming weight.
|
[{'version': 'v1', 'created': 'Sun, 10 Mar 2013 02:14:01 GMT'}]
|
2013-03-12
|
[array(['Zhang', 'Xiyong', ''], dtype=object)
array(['Feng', 'Rongquan', ''], dtype=object)
array(['Liao', 'Qunying', ''], dtype=object)
array(['Gao', 'Xuhong', ''], dtype=object)]
|
765 |
2209.10564
|
Sebastian V\"olkel
|
Sebastian H. V\"olkel, Nicola Franchini, Enrico Barausse, Emanuele
Berti
|
Constraining modifications of black hole perturbation potentials near
the light ring with quasinormal modes
|
12 pages, 7 figures
|
Phys.Rev.D 106 (2022) 12, 124036
|
10.1103/PhysRevD.106.124036
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In modified theories of gravity, the potentials appearing in the
Schr\"odinger-like equations that describe perturbations of non-rotating black
holes are also modified. In this paper we ask: can these modifications be
constrained with high-precision gravitational-wave measurements of the black
hole's quasinormal mode frequencies? We expand the modifications in a small
perturbative parameter regulating the deviation from the general-relativistic
potential, and in powers of $M/r$. We compute the quasinormal modes of the
modified potential up to quadratic order in the perturbative parameter. Then we
use Markov-chain-Monte-Carlo (MCMC) methods to recover the coefficients in the
$M/r$ expansion in an ``optimistic'' scenario where we vary them one at a time,
and in a ``pessimistic'' scenario where we vary them all simultaneously. In
both cases, we find that the bounds on the individual parameters are not
robust. Because quasinormal mode frequencies are related to the behavior of the
perturbation potential near the light ring, we propose a different strategy.
Inspired by Wentzel-Kramers-Brillouin (WKB) theory, we demonstrate that the
value of the potential and of its second derivative at the light ring can be
robustly constrained. These constraints allow for a more direct comparison
between tests based on black hole spectroscopy and observations of black hole
`shadows'' by the Event Horizon Telescope and future instruments.
|
[{'version': 'v1', 'created': 'Wed, 21 Sep 2022 18:00:02 GMT'}
{'version': 'v2', 'created': 'Fri, 12 May 2023 15:36:40 GMT'}]
|
2023-05-15
|
[array(['Völkel', 'Sebastian H.', ''], dtype=object)
array(['Franchini', 'Nicola', ''], dtype=object)
array(['Barausse', 'Enrico', ''], dtype=object)
array(['Berti', 'Emanuele', ''], dtype=object)]
|
766 |
1010.2648
|
Mihail Chizhov
|
M.V. Chizhov, V.A. Bednyakov, J.A. Budagov
|
A unique signal of excited bosons in dijet data from pp-collisions
|
12 pages, 5 figures
| null |
10.1134/S1063778812010061
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
With this note we would like to draw attention to a possible novel signal of
new physics in dijet data at the hadron colliders. Usually it is accepted that
all exotic models predict that these two jets populate the central
(pseudo)rapidity region where y_{1,2} ~ 0. Contrary, the excited bosons do not
contribute into this region, but produce an excess of dijet events over the
almost flat QCD background in chi = exp|y_1-y_2| away from this region.
|
[{'version': 'v1', 'created': 'Wed, 13 Oct 2010 12:44:40 GMT'}]
|
2015-05-20
|
[array(['Chizhov', 'M. V.', ''], dtype=object)
array(['Bednyakov', 'V. A.', ''], dtype=object)
array(['Budagov', 'J. A.', ''], dtype=object)]
|
767 |
2005.09400
|
Grzegorz Gabor
|
Grzegorz Gabor and Jan Tome\v{c}ek
|
Multiple solutions of the Dirichlet problem in multidimensional billiard
spaces
|
10 pages, 1 figure
| null |
10.1016/j.na.2021.112756
| null |
math.CA
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Dirichlet problem in an $n$-dimensional billiard space is investigated. In
particular, the system of ODEs $\ddot x(t) = f(t,x(t))$ together with Dirichlet
boundary conditions $x(0) = A$, $x(T) = B$ in an $n$-dimensional interval $K$
with elastic impact on the boundary of $K$ is considered. The existence of
multiple solutions having prescribed number of impacts with the boundary is
proved. As a consequence the existence of infinitely many solutions is proved,
too. The problem is solved by reformulation it into non-impulsive problem with
a discontinuous right-hand side. This auxiliary problem is regularized and the
Schauder Fixed Point Theorem is used.
|
[{'version': 'v1', 'created': 'Tue, 19 May 2020 12:49:34 GMT'}
{'version': 'v2', 'created': 'Mon, 25 Apr 2022 11:19:19 GMT'}]
|
2022-04-26
|
[array(['Gabor', 'Grzegorz', ''], dtype=object)
array(['Tomeček', 'Jan', ''], dtype=object)]
|
768 |
2105.09353
|
Francesca Prinari
|
Briani Luca, Buttazzo Giuseppe, and Prinari Francesca
|
Inequalities between torsional rigidity and principal eigenvalue of the
$p$-Laplacian
| null | null | null | null |
math.AP math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the torsional rigidity and the principal eigenvalue related to
the $p$-Laplace operator. The goal is to find upper and lower bounds to
products of suitable powers of the quantities above in various classes of
domains. The limit cases $p=1$ and $p=\infty$ are also analyzed, which amount
to consider the Cheeger constant of a domain and functionals involving the
distance function from the boundary.
|
[{'version': 'v1', 'created': 'Wed, 19 May 2021 18:42:29 GMT'}]
|
2021-05-21
|
[array(['Luca', 'Briani', ''], dtype=object)
array(['Giuseppe', 'Buttazzo', ''], dtype=object)
array(['Francesca', 'Prinari', ''], dtype=object)]
|
769 |
2007.01774
|
Benjamin Tan
|
Benjamin Tan, Marc-Antoine Lemonde, Supanut Thanasilp, Jirawat
Tangpanitanon, Dimitris G. Angelakis
|
Qubit-efficient encoding schemes for binary optimisation problems
|
9 pages of main text + 6 figures. Comments are welcome
|
Quantum 5, 454 (2021)
|
10.22331/q-2021-05-04-454
| null |
quant-ph cond-mat.dis-nn
|
http://creativecommons.org/licenses/by/4.0/
|
We propose and analyze a set of variational quantum algorithms for solving
quadratic unconstrained binary optimization problems where a problem consisting
of $n_c$ classical variables can be implemented on $\mathcal O(\log n_c)$
number of qubits. The underlying encoding scheme allows for a systematic
increase in correlations among the classical variables captured by a
variational quantum state by progressively increasing the number of qubits
involved. We first examine the simplest limit where all correlations are
neglected, i.e. when the quantum state can only describe statistically
independent classical variables. We apply this minimal encoding to find
approximate solutions of a general problem instance comprised of 64 classical
variables using 7 qubits. Next, we show how two-body correlations between the
classical variables can be incorporated in the variational quantum state and
how it can improve the quality of the approximate solutions. We give an example
by solving a 42-variable Max-Cut problem using only 8 qubits where we exploit
the specific topology of the problem. We analyze whether these cases can be
optimized efficiently given the limited resources available in state-of-the-art
quantum platforms. Lastly, we present the general framework for extending the
expressibility of the probability distribution to any multi-body correlations.
|
[{'version': 'v1', 'created': 'Fri, 3 Jul 2020 15:52:24 GMT'}
{'version': 'v2', 'created': 'Wed, 21 Apr 2021 05:22:39 GMT'}]
|
2021-05-05
|
[array(['Tan', 'Benjamin', ''], dtype=object)
array(['Lemonde', 'Marc-Antoine', ''], dtype=object)
array(['Thanasilp', 'Supanut', ''], dtype=object)
array(['Tangpanitanon', 'Jirawat', ''], dtype=object)
array(['Angelakis', 'Dimitris G.', ''], dtype=object)]
|
770 |
cond-mat/0108046
|
Stefano Giovanazzi
|
S. Giovanazzi, D. O'Dell and G. Kurizki (The Weizmann Institute of
Physics)
|
"Supersolid" self-bound Bose condensates via laser-induced interatomic
forces
|
4 pages, 3 eps figures
|
Phys. Rev. Lett. 88, 130402 (2002)
|
10.1103/PhysRevLett.88.130402
| null |
cond-mat
| null |
We show that the dipole-dipole interatomic forces induced by a single
off-resonant running laser beam can lead to a self-bound pencil-shaped Bose
condensate, even if the laser beam is a plane-wave. For an appropriate laser
intensity the ground state has a quasi-one dimensional density modulation --- a
Bose "supersolid".
|
[{'version': 'v1', 'created': 'Thu, 2 Aug 2001 18:44:06 GMT'}]
|
2015-06-24
|
[array(['Giovanazzi', 'S.', '', 'The Weizmann Institute of\n Physics'],
dtype=object)
array(["O'Dell", 'D.', '', 'The Weizmann Institute of\n Physics'],
dtype=object)
array(['Kurizki', 'G.', '', 'The Weizmann Institute of\n Physics'],
dtype=object) ]
|
771 |
1104.5676
|
Reinier Adelhart Toorop de
|
Reinier de Adelhart Toorop, Federica Bazzocchi and Stefano Morisi
|
Quark mixing in the discrete dark matter model
|
10 pages, 4 figures; version 3 as appeared in Nuclear Physics B
| null |
10.1016/j.nuclphysb.2011.11.020
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider a model in which dark matter is stable as it is charged under a
Z2 symmetry that is residual after an A4 flavour symmetry is broken. We
consider the possibility to generate the quark masses by charging the quarks
appropriately under A4. We find that it is possible to generate the CKM mixing
matrix by an interplay of renormalisable and dimension-six operators. In this
set-up, we predict the third neutrino mixing angle to be large and the dark
matter relic density to be in the correct range. However, low energy
observables - in particular meson-antimeson oscillations - strongly limit the
available parameter space.
|
[{'version': 'v1', 'created': 'Fri, 29 Apr 2011 16:39:10 GMT'}
{'version': 'v2', 'created': 'Tue, 7 Jun 2011 10:04:09 GMT'}
{'version': 'v3', 'created': 'Tue, 6 Dec 2011 16:51:25 GMT'}]
|
2015-03-19
|
[array(['Toorop', 'Reinier de Adelhart', ''], dtype=object)
array(['Bazzocchi', 'Federica', ''], dtype=object)
array(['Morisi', 'Stefano', ''], dtype=object)]
|
772 |
2109.08396
|
Andreas Kuster
|
Andreas Kuster, Jakub Filipek, Viswa Virinchi Muppirala
|
reproducing "ner and pos when nothing is capitalized"
| null | null | null | null |
cs.CL
|
http://creativecommons.org/licenses/by/4.0/
|
Capitalization is an important feature in many NLP tasks such as Named Entity
Recognition (NER) or Part of Speech Tagging (POS). We are trying to reproduce
results of paper which shows how to mitigate a significant performance drop
when casing is mismatched between training and testing data. In particular we
show that lowercasing 50% of the dataset provides the best performance,
matching the claims of the original paper. We also show that we got slightly
lower performance in almost all experiments we have tried to reproduce,
suggesting that there might be some hidden factors impacting our performance.
Lastly, we make all of our work available in a public github repository.
|
[{'version': 'v1', 'created': 'Fri, 17 Sep 2021 08:12:44 GMT'}]
|
2021-09-20
|
[array(['Kuster', 'Andreas', ''], dtype=object)
array(['Filipek', 'Jakub', ''], dtype=object)
array(['Muppirala', 'Viswa Virinchi', ''], dtype=object)]
|
773 |
1904.06667
|
Johannes M\"uller
|
Thibaut Sellinger (1), Johannes M\"uller (2 and 3), Volker H\"osel
(2), Aur\'elien Tellier (1) ((1) Section of Population Genetics, Center of
Life and Food Sciences Weihenstephan, Technische Universit\"at M\"unchen,
Germany, (2) Center for Mathematics, Technische Universit\"at M\"unchen,
Germany, (3) Institute for Computational Biology, Helmholtz Center Munich,
Germany)
|
Are the better cooperators dormant or quiescent?
| null | null | null | null |
q-bio.PE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Despite the wealth of empirical and theoretical studies, the origin and
maintenance of cooperation is still an evolutionary riddle. In this context,
ecological life-history traits which affect the efficiency of selection may
play a role, though these are often ignored. We consider here species such as
bacteria, fungi, invertebrates and plants which exhibit resting stages in the
form of a quiescent state or a seedbank. When quiescent, individuals are
inactive and reproduce upon activation, while under seed bank parents produce
offspring remaining dormant for different amount of time. We assume weak
frequency-dependent selection modeled using game-theory and the prisoners
dilemma (cooperation/defect) as payoff matrix. The cooperators and defectors
are allowed to evolve different quiescence or dormancy times. By means of
singular perturbation theory we reduce the model to a one-dimensional equation
resembling the well known replicator equation, where the gain functions are
scaled with lumped parameters reflecting the time scale of the resting state of
the cooperators and defectors. If both time scales are identical cooperation
cannot persist in a homogeneous population. If, however, the time scale of the
cooperator is distinctively different from that of the defector, cooperation
may become a locally asymptotically stable strategy. Interestingly enough, in
the seedbank case the cooperator needs to be faster than the defector, while in
the quiescent case the cooperator has to be slower. We use adaptive dynamics to
identify situations where cooperation may evolve and form a convergent stable
ESS. We conclude by highlighting the relevance fo these results for many
non-model species and the maintenance of cooperation in microbial, invertebrate
or plant populations.
|
[{'version': 'v1', 'created': 'Sun, 14 Apr 2019 09:58:29 GMT'}]
|
2019-04-16
|
[array(['Sellinger', 'Thibaut', '', '2 and 3'], dtype=object)
array(['Müller', 'Johannes', '', '2 and 3'], dtype=object)
array(['Hösel', 'Volker', ''], dtype=object)
array(['Tellier', 'Aurélien', ''], dtype=object)]
|
774 |
2203.00335
|
Soohyeon Shin
|
Soohyeon Shin, Vladimir Pomjakushin, Marek Bartkowiak, Marisa Medarde,
Tian Shang, Dariusz J. Gawryluk, and Ekaterina Pomjakushina
|
Cu-doping effects on the ferromagnetic semimetal CeAuGe
|
article including supplementary material
|
Journal of Magnetism and Magnetic Materials 551 (2022) 169147
|
10.1016/j.jmmm.2022.169147
| null |
cond-mat.str-el
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
We present a study of Cu-substitution effects in 4f-Ce intermetallic compound
CeAu1-xCuxGe, with potentially unusual electronic states, in the whole
concentration range (x = 0.0 - 1.0). The parent CeAuGe compound, crystallizing
in a non-centrosymmetric hexagonal structure, is a ferromagnetic semimetal with
Curie temperature 10 K. Cu-doping on Au-site of CeAuGe, CeAu1-xCuxGe, changes
the crystal structure from the non-centrosymmetric (P63mc) to centrosymmetric
(P63/mmc) space group at the concentration x ~ 0.5, where the c-lattice
constant has a maximum value. Magnetic susceptibility and electrical
resistivity measurements reveal that all Cu-doped compounds undergo magnetic
phase transition near 10 K, with the maximum transition temperature of 12 K for
x = 0.5. The neutron powder diffraction experiments show the ferromagnetic
ordering of Ce3+ magnetic moments with a value of ~ 1.2 Bohr magneton at 1.8 K,
oriented perpendicular to the hexagonal c-axis. By using symmetry analysis, we
have found the solutions for the magnetic structure in the ferromagnetic
Shubnikov space groups Cmc'21' and P21'/m' for x < 0.5 and x >= 0.5,
respectively. Electrical resistivity exhibits a metallic temperature behaviour
in all compounds. The resistivity has a local minimum in the paramagnetic state
due to Kondo effects at high doping x = 0.8 and 1.0. At the small Cu-doping
level, x = 0.2, the resistivity shows a broad feature at the ferromagnetic
transition temperature and an additional transition-like peculiarity at 2.5 K
in the ferromagnetic state.
|
[{'version': 'v1', 'created': 'Tue, 1 Mar 2022 10:19:38 GMT'}]
|
2022-03-02
|
[array(['Shin', 'Soohyeon', ''], dtype=object)
array(['Pomjakushin', 'Vladimir', ''], dtype=object)
array(['Bartkowiak', 'Marek', ''], dtype=object)
array(['Medarde', 'Marisa', ''], dtype=object)
array(['Shang', 'Tian', ''], dtype=object)
array(['Gawryluk', 'Dariusz J.', ''], dtype=object)
array(['Pomjakushina', 'Ekaterina', ''], dtype=object)]
|
775 |
2011.12217
|
Rima Chatterjee
|
Rima Chatterjee
|
Links in overtwisted contact manifolds
|
V2: Fixed some typos, added an example. Only contains the first part
of version 1
| null | null | null |
math.SG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove that Legendrian and transverse links in overtwisted contact
structures having overtwisted complements can be classified coarsely by their
classical invariants. We further prove that any coarse equivalence class of
loose links has support genus zero and constructed examples to show that the
converse does not hold.
|
[{'version': 'v1', 'created': 'Tue, 24 Nov 2020 17:08:41 GMT'}
{'version': 'v2', 'created': 'Sun, 15 Aug 2021 16:33:33 GMT'}]
|
2021-08-17
|
[array(['Chatterjee', 'Rima', ''], dtype=object)]
|
776 |
2104.09265
|
Yong-il Shin
|
Younghoon Lim, Junhong Goo, Haneul Kwak, Yong-il Shin
|
Large-area $^{87}$Rb Bose-Einstein condensate in a clipped-Gaussian
optical dipole trap
|
6 pages, 6 figures
|
Phys. Rev. A 103, 063319 (2021)
|
10.1103/PhysRevA.103.063319
| null |
cond-mat.quant-gas
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We demonstrate a production of large-area $^{87}$Rb Bose-Einstein condensates
(BECs) using a non-Gaussian optical dipole trap (ODT). The ODT is formed by
focusing a symmetrically truncated Gaussian laser beam and it is shown that the
beam clipping causes the trap geometry elongated and flattened along the beam
axis direction. In the clipped-Gaussian ODT, an elongated, highly oblate BEC of
$^{87}$Rb is generated with length and width of approximately
$470~\mu\textrm{m}$ and $130~\mu\textrm{m}$, respectively, where the condensate
healing length is estimated to be $\xi\approx 0.25~\mu\textrm{m}$ at the trap
center. The ODT is characterized to have a quartic trapping potential along the
beam axis and the atom density of the condensate is uniform within 10% over
$1000\xi$ in the central region. Finally, we discuss the prospect of conducting
vortex shedding experiments using the elongated condensate.
|
[{'version': 'v1', 'created': 'Mon, 19 Apr 2021 13:12:09 GMT'}]
|
2021-06-30
|
[array(['Lim', 'Younghoon', ''], dtype=object)
array(['Goo', 'Junhong', ''], dtype=object)
array(['Kwak', 'Haneul', ''], dtype=object)
array(['Shin', 'Yong-il', ''], dtype=object)]
|
777 |
2204.11542
|
J\'er\^ome Crassous
|
J\'er\^ome Crassous
|
A Discrete Element Method model for frictional fibers
| null | null |
10.1103/PhysRevE.107.025003
| null |
cond-mat.soft
|
http://creativecommons.org/licenses/by/4.0/
|
We present a Discrete Element Method algorithm for the simulation of elastic
fibers in frictional contacts. The fibers are modeled as chains of cylindrical
segments connected to each other by springs taking into account elongation,
bending and torsion forces. The frictional contacts between the cylinders are
modeled using a Cundall and Strack model routinely used in granular material
simulations. The physical scales for simulations, the determination and the
tracking of contacts, and the algorithm are discussed. Tests on different
situations involving few or many contact points are presented and compared to
experiments or to theoretical predictions.
|
[{'version': 'v1', 'created': 'Mon, 25 Apr 2022 10:23:53 GMT'}
{'version': 'v2', 'created': 'Thu, 2 Feb 2023 08:51:25 GMT'}]
|
2023-03-08
|
[array(['Crassous', 'Jérôme', ''], dtype=object)]
|
778 |
0902.4292
|
Shinji Koide Dr.
|
Shinji Koide
|
Generalized Relativistic Magnetohydrodynamic Equations for Pair and
Electron-Ion Plasmas
|
Comments: 34 pages, 1 figures, The Astrophysical Journal, in press
|
Astrophys.J.696:2220-2233,2009; Erratum-ibid.701:2033,2009
|
10.1088/0004-637X/696/2/2220 10.1088/0004-637X/701/2/2033
| null |
astro-ph.HE astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We derived one-fluid equations based on a relativistic two-fluid
approximation of e$^\pm$ pair plasma and electron-ion plasma to reveal the
specific relativistic nature of their behavior. Assuming simple condition on
the relativistic one-fluid equations, we propose generalized relativistic
magnetohydrodynamic (RMHD) equations which satisfy causality. We show the
linear analyses of these equations regarding various plasma waves to show the
validity of the generalized RMHD equations derived here and to reveal the
distinct properties of the pair plasma and electron-ion plasma. The distinct
properties relate to (i) the inertia effect of electric charge, (ii) the
momentum of electric current, (iii) the relativistic Hall effect, (iv) the
thermal electromotive force, and (v) the thermalized energy exchange between
the two fluids. Using the generalized RMHD equations, we also clarify the
condition that we can use standard RMHD equations and that we need the distinct
RMHD equations of pair and electron-ion plasmas. The standard RMHD is available
only when the relative velocity of the two fluids is nonrelativistic, a
difference of the enthalpy densities of the two fluids is much smaller than the
total enthalpy density, and the above distinct properties of the
pair/electron-ion plasma are negligible. We discuss a general relativistic
version of the equations applicable to the pair and electron-ion plasmas in
black hole magnetospheres. We find the effective resistivity due to shear of
frame ragging around a rotating black hole.
|
[{'version': 'v1', 'created': 'Wed, 25 Feb 2009 06:36:34 GMT'}]
|
2009-08-11
|
[array(['Koide', 'Shinji', ''], dtype=object)]
|
779 |
quant-ph/0304099
|
Ahmed Younes
|
Ahmed Younes and Julian Miller
|
Automated Method for Building CNOT Based Quantum Circuits for Boolean
Functions
|
18 pages
|
In Proceeding of ICENCO2004 pp. 562- 565 (2004).
| null |
CSR-03-3
|
quant-ph
| null |
In this paper we discuss an efficient technique that can implement any given
Boolean function as a quantum circuit. The method converts a truth table of a
Boolean function to the corresponding quantum circuit using a minimal number of
auxiliary qubits. We give examples of some circuits synthesized with this
technique. A direct result that follows from the technique is a new way to
convert any classical digital circuit to its classical reversible form.
|
[{'version': 'v1', 'created': 'Mon, 14 Apr 2003 12:18:10 GMT'}]
|
2008-08-06
|
[array(['Younes', 'Ahmed', ''], dtype=object)
array(['Miller', 'Julian', ''], dtype=object)]
|
780 |
2102.13423
|
Roger Mar\'i
|
Roland Akiki, Roger Mar\'i, Carlo de Franchis, Jean-Michel Morel,
Gabriele Facciolo
|
Robust Rational Polynomial Camera Modelling for SAR and Pushbroom
Imaging
| null | null |
10.1109/IGARSS47720.2021.9554583
| null |
eess.IV cs.CV
|
http://creativecommons.org/licenses/by-sa/4.0/
|
The Rational Polynomial Camera (RPC) model can be used to describe a variety
of image acquisition systems in remote sensing, notably optical and Synthetic
Aperture Radar (SAR) sensors. RPC functions relate 3D to 2D coordinates and
vice versa, regardless of physical sensor specificities, which has made them an
essential tool to harness satellite images in a generic way. This article
describes a terrain-independent algorithm to accurately derive a RPC model from
a set of 3D-2D point correspondences based on a regularized least squares fit.
The performance of the method is assessed by varying the point correspondences
and the size of the area that they cover. We test the algorithm on SAR and
optical data, to derive RPCs from physical sensor models or from other RPC
models after composition with corrective functions.
|
[{'version': 'v1', 'created': 'Fri, 26 Feb 2021 12:16:35 GMT'}]
|
2022-03-17
|
[array(['Akiki', 'Roland', ''], dtype=object)
array(['Marí', 'Roger', ''], dtype=object)
array(['de Franchis', 'Carlo', ''], dtype=object)
array(['Morel', 'Jean-Michel', ''], dtype=object)
array(['Facciolo', 'Gabriele', ''], dtype=object)]
|
781 |
cond-mat/0204621
|
Mark Dykman
|
M.I. Dykman, B. Golding, J.R. Kruse, L.I. McCann, and D. Ryvkine
|
Universality in escape from a modulated potential well
|
4 pages, 3 figures
| null |
10.1063/1.1584917
| null |
cond-mat.mes-hall cond-mat.stat-mech
| null |
We show that the rate of activated escape $W$ from a periodically modulated
potential displays scaling behavior versus modulation amplitude $A$. For
adiabatic modulation of an optically trapped Brownian particle, measurements
yield $\ln W\propto (A_{\rm c} - A)^{\mu}$ with $\mu = 1.5$. The theory gives
$\mu=3/2$ in the adiabatic limit and predicts a crossover to $\mu=2$ scaling as
$A$ approaches the bifurcation point where the metastable state disappears.
|
[{'version': 'v1', 'created': 'Mon, 29 Apr 2002 23:07:08 GMT'}]
|
2009-11-07
|
[array(['Dykman', 'M. I.', ''], dtype=object)
array(['Golding', 'B.', ''], dtype=object)
array(['Kruse', 'J. R.', ''], dtype=object)
array(['McCann', 'L. I.', ''], dtype=object)
array(['Ryvkine', 'D.', ''], dtype=object)]
|
782 |
1401.6065
|
Eyal Lubetzky
|
Eyal Lubetzky, Allan Sly
|
Information percolation and cutoff for the stochastic Ising model
|
42 pages, 8 figures
| null | null | null |
math.PR math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce a new framework for analyzing Glauber dynamics for the Ising
model. The traditional approach for obtaining sharp mixing results has been to
appeal to estimates on spatial properties of the stationary measure from within
a multi-scale analysis of the dynamics. Here we propose to study these
simultaneously by examining "information percolation" clusters in the
space-time slab.
Using this framework, we obtain new results for the Ising model on
$(\mathbb{Z}/n\mathbb{Z})^d$ throughout the high temperature regime:
total-variation mixing exhibits cutoff with an $O(1)$-window around the time at
which the magnetization is the square-root of the volume. (Previously, cutoff
in the full high temperature regime was only known for $d\leq 2$, and only with
an $O(\log\log n)$-window.)
Furthermore, the new framework opens the door to understanding the effect of
the initial state on the mixing time. We demonstrate this on the 1D Ising
model, showing that starting from the uniform ("disordered") initial
distribution asymptotically halves the mixing time, whereas almost every
deterministic starting state is asymptotically as bad as starting from the
("ordered") all-plus state.
|
[{'version': 'v1', 'created': 'Thu, 23 Jan 2014 17:31:16 GMT'}
{'version': 'v2', 'created': 'Tue, 8 Jul 2014 00:35:01 GMT'}
{'version': 'v3', 'created': 'Thu, 28 May 2015 13:13:50 GMT'}]
|
2015-05-29
|
[array(['Lubetzky', 'Eyal', ''], dtype=object)
array(['Sly', 'Allan', ''], dtype=object)]
|
783 |
1210.1268
|
James Lucietti
|
Hari K. Kunduri and James Lucietti
|
Degenerate horizons, Einstein metrics, and Lens space bundles
|
42 pages. v2: minor changes, published version
|
Journal of Geometry and Physics 86 (2014) 571-598
|
10.1016/j.geomphys.2014.10.010
|
EMPG-12-23
|
hep-th gr-qc math.DG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a new infinite class of near-horizon geometries of degenerate
horizons, satisfying Einstein's equations for all odd dimensions greater than
five. The symmetry and topology of these solutions is compatible with those of
black holes. The simplest examples give horizons of spatial topology S^3xS^2 or
the non-trivial S^3-bundle over S^2. More generally, the horizons are Lens
space bundles associated to certain principal torus-bundles over Fano
Kaehler-Einstein manifolds. We also consider the classification problem for
Einstein metrics on such Lens space bundles and derive a family which unifies
all the known examples (Sasakian and non-Sasakian).
|
[{'version': 'v1', 'created': 'Thu, 4 Oct 2012 00:15:25 GMT'}
{'version': 'v2', 'created': 'Wed, 19 Nov 2014 17:00:06 GMT'}]
|
2014-11-20
|
[array(['Kunduri', 'Hari K.', ''], dtype=object)
array(['Lucietti', 'James', ''], dtype=object)]
|
784 |
1811.10678
|
Navin Anwani
|
Navin Anwani and Bipin Rajendran
|
Training Multi-layer Spiking Neural Networks using NormAD based
Spatio-Temporal Error Backpropagation
|
19 pages, 10 figures
| null | null | null |
cs.NE cs.LG eess.SP stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Spiking neural networks (SNNs) have garnered a great amount of interest for
supervised and unsupervised learning applications. This paper deals with the
problem of training multi-layer feedforward SNNs. The non-linear
integrate-and-fire dynamics employed by spiking neurons make it difficult to
train SNNs to generate desired spike trains in response to a given input. To
tackle this, first the problem of training a multi-layer SNN is formulated as
an optimization problem such that its objective function is based on the
deviation in membrane potential rather than the spike arrival instants. Then,
an optimization method named Normalized Approximate Descent (NormAD),
hand-crafted for such non-convex optimization problems, is employed to derive
the iterative synaptic weight update rule. Next, it is reformulated to
efficiently train multi-layer SNNs, and is shown to be effectively performing
spatio-temporal error backpropagation. The learning rule is validated by
training $2$-layer SNNs to solve a spike based formulation of the XOR problem
as well as training $3$-layer SNNs for generic spike based training problems.
Thus, the new algorithm is a key step towards building deep spiking neural
networks capable of efficient event-triggered learning.
|
[{'version': 'v1', 'created': 'Tue, 23 Oct 2018 19:19:44 GMT'}
{'version': 'v2', 'created': 'Mon, 29 Jul 2019 03:37:40 GMT'}]
|
2019-07-30
|
[array(['Anwani', 'Navin', ''], dtype=object)
array(['Rajendran', 'Bipin', ''], dtype=object)]
|
785 |
2206.14810
|
Jeonggil Song
|
Jeonggil Song
|
Predicting Economic Welfare with Images on Wealth
|
13 pages, 6 figures
| null | null | null |
econ.GN q-fin.EC
|
http://creativecommons.org/licenses/by/4.0/
|
Using images containing information on wealth, this research investigates
that pictures are capable of reliably predicting the economic prosperity of
households. Without surveys on wealth-related information and human-made
standard of wealth quality that the traditional wealth-based approach relied
on, this novel approach makes use of only images posted on Dollar Street as
input data on household wealth across 66 countries and predicts the consumption
or income level of each household using the Convolutional Neural Network (CNN)
method. The best result predicts the log of consumption level with root mean
squared error of 0.66 and R-squared of 0.80 in CNN regression problem. In
addition, this simple model also performs well in classifying extreme poverty
with an accuracy of 0.87 and F-beta score of 0.86. Since the model shows a
higher performance in the extreme poverty classification when I applied the
different threshold of poverty lines to countries by their income group, it is
suggested that the decision of the World Bank to define poverty lines
differently by income group was valid.
|
[{'version': 'v1', 'created': 'Wed, 29 Jun 2022 08:53:39 GMT'}]
|
2022-07-01
|
[array(['Song', 'Jeonggil', ''], dtype=object)]
|
786 |
1905.00046
|
Jayden Newstead
|
Nicole F. Bell, James B. Dent, Jayden L. Newstead, Subir Sabharwal,
Thomas J. Weiler
|
The Migdal Effect and Photon Bremsstrahlung in effective field theories
of dark matter direct detection and coherent elastic neutrino-nucleus
scattering
|
17 pages, 6 figures
|
Phys. Rev. D 101, 015012 (2020)
|
10.1103/PhysRevD.101.015012
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Dark matter direct detection experiments have limited sensitivity to light
dark matter (below a few GeV), due to the challenges of lowering energy
thresholds for the detection of nuclear recoil to below
$\mathcal{O}(\mathrm{keV})$. While impressive progress has been made on this
front, light dark matter remains the least constrained region of dark-matter
parameter space. It has been shown that both ionization and excitation due to
the Migdal effect and coherently-emitted photon bremsstrahlung from the
recoiling atom can provide observable channels for light dark matter that would
otherwise have been missed owing to the resulting nuclear recoil falling below
the detector threshold. In this paper we extend previous work by calculating
the Migdal effect and photon bremmstrahlung rates for a general set of
interaction types, including those that are momentum-independent or -dependent,
spin-independent or -dependent, as well as examining the rates for a variety of
target materials, allowing us to place new experimental limits on some of these
interaction types. Additionally, we include a calculation of these effects
induced by the coherent scattering on nuclei of solar or atmospheric neutrinos.
We demonstrate that the Migdal effect dominates over the bremsstrahlung effect
for all targets considered for interactions induced by either dark matter or
neutrinos. This reduces photon bremsstrahlung to irrelevancy for future direct
detection experiments.
|
[{'version': 'v1', 'created': 'Tue, 30 Apr 2019 18:09:11 GMT'}
{'version': 'v2', 'created': 'Mon, 10 Feb 2020 21:47:59 GMT'}]
|
2020-02-12
|
[array(['Bell', 'Nicole F.', ''], dtype=object)
array(['Dent', 'James B.', ''], dtype=object)
array(['Newstead', 'Jayden L.', ''], dtype=object)
array(['Sabharwal', 'Subir', ''], dtype=object)
array(['Weiler', 'Thomas J.', ''], dtype=object)]
|
787 |
math/0605701
|
Q\"endrim Gashi
|
Q\"endrim R. Gashi
|
Vanishing Results for Toric Varieties Associated to $GL_n$ and $G_2$
| null | null | null | null |
math.AG
| null |
Toric varieties associated with root systems appeared very naturally in the
theory of group compactifications. Here they are considered in a very different
context.
We prove the vanishing of higher cohomology groups for certain line bundles
on toric varieties associated to $GL_n$ and $G_2$. This can be considered of
general interest and it improves the previously known results for these
varieties. We also show how these results give a simple proof of a converse to
Mazur's inequality for $GL_n$ and $G_2$ respectively. It is known that the
latter imply the non-emptiness of some affine Deligne-Lusztig varieties.
|
[{'version': 'v1', 'created': 'Sat, 27 May 2006 21:34:50 GMT'}
{'version': 'v2', 'created': 'Fri, 26 Oct 2007 22:35:11 GMT'}]
|
2011-11-09
|
[array(['Gashi', 'Qëndrim R.', ''], dtype=object)]
|
788 |
1910.09191
|
Zhuang Liu
|
Zhuang Liu, Xuanlin Li, Bingyi Kang, Trevor Darrell
|
Regularization Matters in Policy Optimization
|
Published at ICLR 2021; please cite this paper's ICLR 2021 version at
https://github.com/xuanlinli17/iclr2021_rlreg#citation or the arXiv version
from "Export Bibtex Citation" on the right, instead of the "2019 OpenReview"
version in Google Scholar. Thanks!
| null | null | null |
cs.LG cs.AI stat.ML
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Deep Reinforcement Learning (Deep RL) has been receiving increasingly more
attention thanks to its encouraging performance on a variety of control tasks.
Yet, conventional regularization techniques in training neural networks (e.g.,
$L_2$ regularization, dropout) have been largely ignored in RL methods,
possibly because agents are typically trained and evaluated in the same
environment, and because the deep RL community focuses more on high-level
algorithm designs. In this work, we present the first comprehensive study of
regularization techniques with multiple policy optimization algorithms on
continuous control tasks. Interestingly, we find conventional regularization
techniques on the policy networks can often bring large improvement, especially
on harder tasks. Our findings are shown to be robust against training
hyperparameter variations. We also compare these techniques with the more
widely used entropy regularization. In addition, we study regularizing
different components and find that only regularizing the policy network is
typically the best. We further analyze why regularization may help
generalization in RL from four perspectives - sample complexity, reward
distribution, weight norm, and noise robustness. We hope our study provides
guidance for future practices in regularizing policy optimization algorithms.
Our code is available at https://github.com/xuanlinli17/iclr2021_rlreg .
|
[{'version': 'v1', 'created': 'Mon, 21 Oct 2019 08:00:33 GMT'}
{'version': 'v2', 'created': 'Wed, 19 Feb 2020 10:19:31 GMT'}
{'version': 'v3', 'created': 'Tue, 6 Oct 2020 13:53:13 GMT'}
{'version': 'v4', 'created': 'Tue, 23 Feb 2021 04:57:59 GMT'}
{'version': 'v5', 'created': 'Sun, 28 Nov 2021 07:21:35 GMT'}]
|
2021-11-30
|
[array(['Liu', 'Zhuang', ''], dtype=object)
array(['Li', 'Xuanlin', ''], dtype=object)
array(['Kang', 'Bingyi', ''], dtype=object)
array(['Darrell', 'Trevor', ''], dtype=object)]
|
789 |
2107.12332
|
Vitaly Aksenov
|
Vitaly Aksenov
|
Overview of Bachelors Theses 2021
| null | null | null | null |
cs.DC cs.DS
|
http://creativecommons.org/licenses/by/4.0/
|
In this work, we review Bachelors Theses done under the supervision of Vitaly
Aksenov at ITMO University. This overview contains the short description of six
theses: "Development of a Streaming Algorithm for the Decomposition of Graph
Metrics to Tree Metrics" by Oleg Fafurin, "Development of Memory-friendly
Concurrent Data Structures" by Roman Smirnov, "Theoretical Analysis of the
Performance of Concurrent Data Structures" by Daniil Bolotov, "Parallel Batched
Interpolation Search Tree" by Alena Martsenyuk, "Parallel Batched
Self-adjusting Data Structures" by Vitalii Krasnov, and "Parallel Batched
Persistent Binary Search Trees" by Ildar Zinatulin.
|
[{'version': 'v1', 'created': 'Mon, 26 Jul 2021 17:15:25 GMT'}]
|
2021-07-27
|
[array(['Aksenov', 'Vitaly', ''], dtype=object)]
|
790 |
1905.02232
|
Brandt Gaches
|
Brandt A.L. Gaches, Stella S.R. Offner, Thomas G. Bisbas
|
The Astrochemical Impact of Cosmic Rays in Protoclusters I: Molecular
Cloud Chemistry
|
Accepted to ApJ. The code used is public at
https://uclchem.github.io/3dpdr.html
| null |
10.3847/1538-4357/ab20c7
| null |
astro-ph.GA astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present astrochemical photo-dissociation region models in which cosmic ray
attenuation has been fully coupled to the chemical evolution of the gas. We
model the astrochemical impact of cosmic rays, including those accelerated by
protostellar accretion shocks, on molecular clouds hosting protoclusters. Our
models with embedded protostars reproduce observed ionization rates. We study
the imprint of cosmic ray attenuation on ions for models with different surface
cosmic ray spectra and different star formation efficiencies. We find that
abundances, particularly ions, are sensitive to the treatment of cosmic rays.
We show the column densities of ions are under predicted by the `classic'
treatment of cosmic rays by an order of magnitude. We also test two common
chemistry approximations used to infer ionization rates. We conclude that the
approximation based on the H$_3^+$ abundance under predicts the ionization rate
except in regions where the cosmic rays dominate the chemistry. Our models
suggest the chemistry in dense gas will be significantly impacted by the
increased ionization rates, leading to a reduction in molecules such as NH$_3$
and causing H$_2$-rich gas to become [C II] bright.
|
[{'version': 'v1', 'created': 'Mon, 6 May 2019 18:27:40 GMT'}
{'version': 'v2', 'created': 'Thu, 9 May 2019 19:34:19 GMT'}]
|
2019-06-26
|
[array(['Gaches', 'Brandt A. L.', ''], dtype=object)
array(['Offner', 'Stella S. R.', ''], dtype=object)
array(['Bisbas', 'Thomas G.', ''], dtype=object)]
|
791 |
1706.07477
|
Nitin Tiwari S.
|
Nitin S. Tiwari and Paul van der Schoot
|
On the Kinetics of Body versus End Evaporation and Addition of
Supramolecular Polymers
| null | null | null | null |
cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Although pathway-specific kinetic theories are fundamentally important to
describe and understand reversible polymerisation kinetics, they come in
principle at a cost of having a large number of system-specific parameters.
Here, we construct a dynamical Landau theory to describe the kinetics of
activated linear supramolecular self-assembly, which drastically reduces the
number of parameters and still describes most of the interesting and generic
behavior of the system in hand. This phenomenological approach hinges on the
fact that if nucleated, the polymerisation transition resembles a phase
transition. We are able to describe hysteresis, overshooting, undershooting and
the existence of a lag time before polymerisation takes off, and pinpoint the
conditions required for observing these types of phenomenon in the assembly and
disassembly kinetics. We argue that the phenomenological kinetic parameter in
our theory is a pathway controller, i.e., it controls the relative weights of
the molecular pathways through which self-assembly takes place.
|
[{'version': 'v1', 'created': 'Thu, 22 Jun 2017 20:05:28 GMT'}
{'version': 'v2', 'created': 'Mon, 3 Jul 2017 01:38:04 GMT'}]
|
2017-07-04
|
[array(['Tiwari', 'Nitin S.', ''], dtype=object)
array(['van der Schoot', 'Paul', ''], dtype=object)]
|
792 |
1001.0784
|
Jeff Greensite
|
J. Greensite
|
Faddeev-Popov spectra at the Gribov horizon
|
12 pages, 8 figures; v2: reference added
|
Phys.Rev.D81:114011,2010
|
10.1103/PhysRevD.81.114011
| null |
hep-th hep-lat
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
I present a perturbative calculation of the spectrum of the Faddeev-Popov
operator in Coulomb gauge in three dimensions, and Landau gauge in two and
three dimensions, with an ansatz for the gluon propagator as the
non-perturbative input. The results show how the low-lying Faddeev-Popov
eigenvalue spectrum is modified as the first Gribov horizon is approached, and
how the spectra can differ in Coulomb and Landau gauges.
|
[{'version': 'v1', 'created': 'Tue, 5 Jan 2010 22:26:49 GMT'}
{'version': 'v2', 'created': 'Tue, 19 Jan 2010 21:27:29 GMT'}]
|
2014-11-20
|
[array(['Greensite', 'J.', ''], dtype=object)]
|
793 |
1608.04661
|
Mohammad Hosseini
|
Mohammad Hosseini, Yu Jiang, Poliang Wu, Richard B. Berlin Jr.,
Shangping Ren, Lui Sha
|
A Pathophysiological Model-Driven Communication for Dynamic Distributed
Medical Best Practice Guidance Systems
|
14 pages, Journal of Medical Systems, Springer, 2016
| null | null | null |
cs.CY
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
There is a great divide between rural and urban areas, particularly in
medical emergency care. Although medical best practice guidelines exist in
hospital handbooks, they are often lengthy and difficult to apply clinically.
The challenges are exaggerated for doctors in rural areas and emergency medical
technicians (EMT) during patient transport.
In this paper, we propose the concept of distributed executable medical best
practice guidance systems to assist adherence to best practice from the time
that a patient first presents at a rural hospital, through diagnosis and
ambulance transfer to arrival and treatment at a regional tertiary hospital
center. We codify complex medical knowledge in the form of simplified
distributed executable disease automata, from the thin automata at rural
hospitals to the rich automata in the regional center hospitals. However, a
main challenge is how to efficiently and safely synchronize distributed best
practice models as the communication among medical facilities, devices, and
professionals generates a large number of messages. This complex problem of
patient diagnosis and transport from rural to center facility is also fraught
with many uncertainties and changes resulting in a high degree of dynamism. To
address this situation, we propose a pathophysiological model-driven message
exchange communication architecture that ensures the real-time and dynamic
requirements of synchronization among distributed emergency best-practice
models are met in a reliable and safe manner. Taking the signs, symptoms, and
progress of stroke patients transported across a geographically distributed
healthcare network as the motivating use case, we implement our communication
system and apply it to our developed best practice automata using laboratory
simulations. Our proof-of-concept experiments shows there is potential for the
use of our system in a wide variety of domains.
|
[{'version': 'v1', 'created': 'Mon, 15 Aug 2016 17:51:02 GMT'}]
|
2016-08-17
|
[array(['Hosseini', 'Mohammad', ''], dtype=object)
array(['Jiang', 'Yu', ''], dtype=object)
array(['Wu', 'Poliang', ''], dtype=object)
array(['Berlin', 'Richard B.', 'Jr.'], dtype=object)
array(['Ren', 'Shangping', ''], dtype=object)
array(['Sha', 'Lui', ''], dtype=object)]
|
794 |
2210.02342
|
Thao Tran
|
Ebube Oyeka, Michal J. Winiarski, Hanka \'Swi\k{a}tek, Wyatt Balliew,
Colin D. McMillen, Mingli Liang, Maurice Sorolla II, Thao T. Tran
|
Ln2(SeO3)2(SO4)(H2O)2 (Ln = Sm, Dy, Yb): A Mixed-Ligand Pathway to New
Lathanide (III) Multifunctional Materials Featuring Nonlinear Optical and
Magnetic Anisotropy Properties
| null | null |
10.1002/anie.202213499
| null |
cond-mat.mtrl-sci
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Bottom-up assembly of optically nonlinear and magnetically anisotropic
lanthanide materials involving precisely placed spin carriers and optimized
metal-ligand coordination offers a potential route to developing electronic
architectures for coherent radiation generation and spin-based technologies,
but the chemical design historically has been extremely hard to achieve. To
address this, we developed a worthwhile avenue for creating new
noncentrosymmetric chiral Ln3+ materials Ln2(SeO3)2(SO4)(H2O)2 (Ln = Sm, Dy,
Yb) by mixed-ligand design. The materials exhibit phase-matching nonlinear
optical responses, elucidating the feasibility of the heteroanionic strategy.
Ln2(SeO3)2(SO4)(H2O)2 displays paramagnetic property with strong magnetic
anisotropy facilitated by large spin-orbit coupling. This study demonstrates a
new chemical pathway for creating previously unknown polar chiral magnets with
multiple functionalities.
|
[{'version': 'v1', 'created': 'Wed, 5 Oct 2022 15:48:29 GMT'}]
|
2022-10-06
|
[array(['Oyeka', 'Ebube', ''], dtype=object)
array(['Winiarski', 'Michal J.', ''], dtype=object)
array(['Świątek', 'Hanka', ''], dtype=object)
array(['Balliew', 'Wyatt', ''], dtype=object)
array(['McMillen', 'Colin D.', ''], dtype=object)
array(['Liang', 'Mingli', ''], dtype=object)
array(['Sorolla', 'Maurice', 'II'], dtype=object)
array(['Tran', 'Thao T.', ''], dtype=object)]
|
795 |
2006.02020
|
Andr\'e C. R. Martins
|
Andr\'e C. R. Martins
|
Embracing undecidability: Cognitive needs and theory evaluation
|
10 pages
| null | null | null |
physics.hist-ph cs.LO math.LO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
There are many ways we can not know. Even in systems that we created
ourselves, as, for example, systems in mathematical logic, Go\"edel and
Tarski's theorems impose limits on what we can know. As we try to speak of the
real world, things get even harder. We want to compare the results of our
mathematical theories to observations, and that means the use of inductive
methods. While we can demonstrate how an ideal probabilistic induction should
work, the requirements of such a method include a few infinities. Furthermore,
it would not be even enough to be able to compute those methods and obtain
predictions. There are cases where underdeterminacy might be unavoidable, such
as the interpretation of quantum mechanics or the current status of string
theory. Despite that, scientists still behave as if they were able to know the
truth. As it becomes clear that such behavior can cause severe cognitive
mistakes, the need to accept our limits, both our natural human limits and the
limits of the tools we have created, become apparent. This essay will discuss
how we must accept that knowledge is almost only limited to formal systems.
Moreover, even in those, there will always be undecidable propositions. We will
also see how those questions influence the evaluation of current theories in
physics.
|
[{'version': 'v1', 'created': 'Wed, 3 Jun 2020 03:09:01 GMT'}]
|
2020-06-04
|
[array(['Martins', 'André C. R.', ''], dtype=object)]
|
796 |
1305.4913
|
Stephan Garcia R
|
J.L. Brumbaugh, Madeleine Bulkow, Luis Alberto Garcia, Stephan Ramon
Garcia, Matt Michal, Andrew P. Turner
|
The graphic nature of the symmetric group
|
23 pages, many figures. To appear in Experimental Mathematics
| null | null | null |
math.NT math.GR math.RT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate a remarkable class of exponential sums which are derived from
the symmetric groups and which display a diverse array of visually appealing
features. Our interest in these expressions stems not only from their
astounding visual properties, but also from the fact that they represent a
novel and intriguing class of supercharacters.
|
[{'version': 'v1', 'created': 'Tue, 21 May 2013 18:51:49 GMT'}
{'version': 'v2', 'created': 'Wed, 7 Aug 2013 14:47:05 GMT'}]
|
2013-08-08
|
[array(['Brumbaugh', 'J. L.', ''], dtype=object)
array(['Bulkow', 'Madeleine', ''], dtype=object)
array(['Garcia', 'Luis Alberto', ''], dtype=object)
array(['Garcia', 'Stephan Ramon', ''], dtype=object)
array(['Michal', 'Matt', ''], dtype=object)
array(['Turner', 'Andrew P.', ''], dtype=object)]
|
797 |
astro-ph/9605046
|
Bruce Draine
|
B.T. Draine (Princeton University Observatory) and Joseph C.
Weingartner (Physics Dept., Princeton University)
|
Radiative Torques on Interstellar Grains: I. Superthermal Spinup
|
46 pages, 15 eps figures, uses aaspp4.sty . Ap.J., in press (Oct.10)
| null |
10.1086/177887
|
POPe-668
|
astro-ph
| null |
Irregular dust grains are subject to radiative torques when irradiated by
interstellar starlight. It is shown how these radiative torques may be
calculated using the discrete dipole approximation. Calculations are carried
out for one irregular grain geometry, and three different grain sizes. It is
shown that radiative torques can play an important dynamical role in spinup of
interstellar dust grains, resulting in rotation rates which may exceed even
those expected from H_2 formation on the grain surface. Because the radiative
torque on an interstellar grain is determined by the overall grain geometry
rather than merely the state of the grain surface, the resulting superthermal
rotation is expected to be long-lived. By itself, long-lived superthermal
rotation would permit grain alignment by normal paramagnetic dissipation on the
"Davis-Greenstein" timescale. However, radiative torques arising from
anisotropy of the starlight background can act directly to alter the grain
alignment on much shorter timescales, and are therefore central to the process
of interstellar grain alignment.
Radiative torques depend strongly on the grain size, measured by a_eff, the
radius of a sphere of equal volume. In diffuse clouds, radiative torques
dominate the torques due to H2 formation for a_eff=0.2micron grains, but are
relatively unimportant for a_eff<0.05micron grains. This may provide a natural
explanation for the observation that $a_eff>0.1 micron grains in diffuse clouds
are aligned, while there is little alignment of a_eff < 0.05 micron grains. We
show that radiative torques are ineffective at producing superthermal rotation
within quiescent dark clouds, but can be very effective in star-forming regions
such as the M17 molecular cloud.
|
[{'version': 'v1', 'created': 'Thu, 9 May 1996 21:59:45 GMT'}]
|
2009-10-28
|
[array(['Draine', 'B. T.', '', 'Princeton University Observatory'],
dtype=object)
array(['Weingartner', 'Joseph C.', '',
'Physics Dept., Princeton University'], dtype=object)]
|
798 |
1907.01258
|
Yimin Ge
|
Yimin Ge and Vedran Dunjko
|
A hybrid algorithm framework for small quantum computers with
application to finding Hamiltonian cycles
|
20+2 pages
| null |
10.1063/1.5119235
| null |
quant-ph cs.CC cs.DS
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recent works have shown that quantum computers can polynomially speed up
certain SAT-solving algorithms even when the number of available qubits is
significantly smaller than the number of variables. Here we generalise this
approach. We present a framework for hybrid quantum-classical algorithms which
utilise quantum computers significantly smaller than the problem size. Given an
arbitrarily small ratio of the quantum computer to the instance size, we
achieve polynomial speedups for classical divide-and-conquer algorithms,
provided that certain criteria on the time- and space-efficiency are met. We
demonstrate how this approach can be used to enhance Eppstein's algorithm for
the cubic Hamiltonian cycle problem, and achieve a polynomial speedup for any
ratio of the number of qubits to the size of the graph.
|
[{'version': 'v1', 'created': 'Tue, 2 Jul 2019 09:36:13 GMT'}]
|
2020-02-19
|
[array(['Ge', 'Yimin', ''], dtype=object)
array(['Dunjko', 'Vedran', ''], dtype=object)]
|
799 |
2109.14581
|
Sara Pizzi
|
Giuseppe Araniti, Antonio Iera, Sara Pizzi, and Federica Rinaldi
|
Towards 6G Non-Terrestrial Networks
| null | null | null | null |
cs.NI eess.SP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Sixth-Generation (6G) technologies will revolutionize the wireless ecosystem
by enabling the delivery of futuristic services through terrestrial and
non-terrestrial transmissions. In this context, the Non-Terrestrial Network
(NTN) is growing in importance owing to its capability to deliver services
anywhere and anytime and also provide coverage in areas that are unreachable by
any conventional Terrestrial Network (TN). The exploitation of the same radio
technology could greatly facilitate the integration of NTNs and TNs into a
unified wireless system. Since New Radio (NR) is the de facto standard to
deliver manifold heterogeneous services in terrestrial wireless systems, 3GPP
is investigating new solutions to extend NR to NTNs. In this paper, the
constraints that NTN features place on NR procedures are investigated by going
thoroughly into 3GPP specifications; strengths and weaknesses of the NR
technology in enabling typical 6G services on NR-enabled NTNs are identified;
finally, open issues and insights are provided as guidelines to steer future
research towards 6G NTNs.
|
[{'version': 'v1', 'created': 'Wed, 29 Sep 2021 17:19:54 GMT'}]
|
2021-09-30
|
[array(['Araniti', 'Giuseppe', ''], dtype=object)
array(['Iera', 'Antonio', ''], dtype=object)
array(['Pizzi', 'Sara', ''], dtype=object)
array(['Rinaldi', 'Federica', ''], dtype=object)]
|
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