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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
6,600 |
1701.00517
|
Vasile Berinde
|
Mitrofan M. Choban, Vasile Berinde
|
A general concept of multiple fixed point for mappings defined on spaces
with a distance
| null | null | null | null |
math.GM
|
http://creativecommons.org/publicdomain/zero/1.0/
|
Our main aim in this paper is to introduce a general concept of
multidimensional fixed point of a mapping in spaces with distance and establish
various multidimensional fixed point results. This new concept simplifies the
similar notion from [A. Roldan, J. Martinez-Moreno, C. Roldan, {\it
Multidimensional fixed point theorems in partially ordered complete metric
spaces}, J. Math. Anal. Appl. 396 (2012), 536--545]. The obtained multiple
fixed point theorems extend, generalise and unify many related results in
literature.
|
[{'version': 'v1', 'created': 'Thu, 29 Dec 2016 14:18:52 GMT'}]
|
2017-01-04
|
[array(['Choban', 'Mitrofan M.', ''], dtype=object)
array(['Berinde', 'Vasile', ''], dtype=object)]
|
6,601 |
1610.03159
|
Demitri Muna
|
Demitri Muna, Michael Alexander, Alice Allen, Richard Ashley, Daniel
Asmus, Ruyman Azzollini, Michele Bannister, Rachael Beaton, Andrew Benson, G.
Bruce Berriman, Maciej Bilicki, Peter Boyce, Joanna Bridge, Jan Cami, Eryn
Cangi, Xian Chen, Nicholas Christiny, Christopher Clark, Michelle Collins,
Johan Comparat, Neil Cook, Darren Croton, Isak Delberth Davids, \'Eric
Depagne, John Donor, Leonardo A. dos Santos, Stephanie Douglas, Alan Du,
Meredith Durbin, Dawn Erb, Daniel Faes, J. G. Fern\'andez-Trincado, Anthony
Foley, Sotiria Fotopoulou, S{\o}ren Frimann, Peter Frinchaboy, Rafael
Garcia-Dias, Artur Gawryszczak, Elizabeth George, Sebastian Gonzalez, Karl
Gordon, Nicholas Gorgone, Catherine Gosmeyer, Katie Grasha, Perry Greenfield,
Rebekka Grellmann, James Guillochon, Mark Gurwell, Marcel Haas, Alex Hagen,
Daryl Haggard, Tim Haines, Patrick Hall, Wojciech Hellwing, Edmund Christian
Herenz, Samuel Hinton, Renee Hlozek, John Hoffman, Derek Holman, Benne Willem
Holwerda, Anthony Horton, Cameron Hummels, Daniel Jacobs, Jens Juel Jensen,
David Jones, Arna Karick, Luke Kelley, Matthew Kenworthy, Ben Kitchener,
Dominik Klaes, Saul Kohn, Piotr Konorski, Coleman Krawczyk, Kyler Kuehn, Teet
Kuutma, Michael T. Lam, Richard Lane, Jochen Liske, Diego Lopez-Camara,
Katherine Mack, Sam Mangham, Qingqing Mao, David J. E. Marsh, Cecilia Mateu,
Lo\"ic Maurin, James McCormac, Ivelina Momcheva, Hektor Monteiro, Michael
Mueller, Roberto Munoz, Rohan Naidu, Nicholas Nelson, Christian Nitschelm,
Chris North, Juan Nunez-Iglesias, Sara Ogaz, Russell Owen, John Parejko, Vera
Patr\'icio, Joshua Pepper, Marshall Perrin, Timothy Pickering, Jennifer
Piscionere, Richard Pogge, Radek Poleski, Alkistis Pourtsidou, Adrian M.
Price-Whelan, Meredith L. Rawls, Shaun Read, Glen Rees, Hanno Rein, Thomas
Rice, Signe Riemer-S{\o}rensen, Naum Rusomarov, Sebastian F. Sanchez, Miguel
Santander-Garc\'ia, Gal Sarid, William Schoenell, Aleks Scholz, Robert L.
Schuhmann, William Schuster, Peter Scicluna, Marja Seidel, Lijing Shao,
Pranav Sharma, Aleksandar Shulevski, David Shupe, Crist\'obal Sif\'on, Brooke
Simmons, Manodeep Sinha, Ian Skillen, Bjoern Soergel, Thomas Spriggs, Sundar
Srinivasan, Abigail Stevens, Ole Streicher, Eric Suchyta, Joshua Tan, O.
Grace Telford, Romain Thomas, Chiara Tonini, Grant Tremblay, Sarah Tuttle,
Tanya Urrutia, Sam Vaughan, Miguel Verdugo, Alexander Wagner, Josh
Walawender, Andrew Wetzel, Kyle Willett, Peter K. G. Williams, Guang Yang,
Guangtun Zhu, Andrea Zonca
|
The Astropy Problem
| null | null | null | null |
astro-ph.IM physics.soc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Astropy Project (http://astropy.org) is, in its own words, "a community
effort to develop a single core package for Astronomy in Python and foster
interoperability between Python astronomy packages." For five years this
project has been managed, written, and operated as a grassroots,
self-organized, almost entirely volunteer effort while the software is used by
the majority of the astronomical community. Despite this, the project has
always been and remains to this day effectively unfunded. Further, contributors
receive little or no formal recognition for creating and supporting what is now
critical software. This paper explores the problem in detail, outlines possible
solutions to correct this, and presents a few suggestions on how to address the
sustainability of general purpose astronomical software.
|
[{'version': 'v1', 'created': 'Tue, 11 Oct 2016 02:33:37 GMT'}]
|
2016-10-12
|
[array(['Muna', 'Demitri', ''], dtype=object)
array(['Alexander', 'Michael', ''], dtype=object)
array(['Allen', 'Alice', ''], dtype=object)
array(['Ashley', 'Richard', ''], dtype=object)
array(['Asmus', 'Daniel', ''], dtype=object)
array(['Azzollini', 'Ruyman', ''], dtype=object)
array(['Bannister', 'Michele', ''], dtype=object)
array(['Beaton', 'Rachael', ''], dtype=object)
array(['Benson', 'Andrew', ''], dtype=object)
array(['Berriman', 'G. Bruce', ''], dtype=object)
array(['Bilicki', 'Maciej', ''], dtype=object)
array(['Boyce', 'Peter', ''], dtype=object)
array(['Bridge', 'Joanna', ''], dtype=object)
array(['Cami', 'Jan', ''], dtype=object)
array(['Cangi', 'Eryn', ''], dtype=object)
array(['Chen', 'Xian', ''], dtype=object)
array(['Christiny', 'Nicholas', ''], dtype=object)
array(['Clark', 'Christopher', ''], dtype=object)
array(['Collins', 'Michelle', ''], dtype=object)
array(['Comparat', 'Johan', ''], dtype=object)
array(['Cook', 'Neil', ''], dtype=object)
array(['Croton', 'Darren', ''], dtype=object)
array(['Davids', 'Isak Delberth', ''], dtype=object)
array(['Depagne', 'Éric', ''], dtype=object)
array(['Donor', 'John', ''], dtype=object)
array(['Santos', 'Leonardo A. dos', ''], dtype=object)
array(['Douglas', 'Stephanie', ''], dtype=object)
array(['Du', 'Alan', ''], dtype=object)
array(['Durbin', 'Meredith', ''], dtype=object)
array(['Erb', 'Dawn', ''], dtype=object)
array(['Faes', 'Daniel', ''], dtype=object)
array(['Fernández-Trincado', 'J. G.', ''], dtype=object)
array(['Foley', 'Anthony', ''], dtype=object)
array(['Fotopoulou', 'Sotiria', ''], dtype=object)
array(['Frimann', 'Søren', ''], dtype=object)
array(['Frinchaboy', 'Peter', ''], dtype=object)
array(['Garcia-Dias', 'Rafael', ''], dtype=object)
array(['Gawryszczak', 'Artur', ''], dtype=object)
array(['George', 'Elizabeth', ''], dtype=object)
array(['Gonzalez', 'Sebastian', ''], dtype=object)
array(['Gordon', 'Karl', ''], dtype=object)
array(['Gorgone', 'Nicholas', ''], dtype=object)
array(['Gosmeyer', 'Catherine', ''], dtype=object)
array(['Grasha', 'Katie', ''], dtype=object)
array(['Greenfield', 'Perry', ''], dtype=object)
array(['Grellmann', 'Rebekka', ''], dtype=object)
array(['Guillochon', 'James', ''], dtype=object)
array(['Gurwell', 'Mark', ''], dtype=object)
array(['Haas', 'Marcel', ''], dtype=object)
array(['Hagen', 'Alex', ''], dtype=object)
array(['Haggard', 'Daryl', ''], dtype=object)
array(['Haines', 'Tim', ''], dtype=object)
array(['Hall', 'Patrick', ''], dtype=object)
array(['Hellwing', 'Wojciech', ''], dtype=object)
array(['Herenz', 'Edmund Christian', ''], dtype=object)
array(['Hinton', 'Samuel', ''], dtype=object)
array(['Hlozek', 'Renee', ''], dtype=object)
array(['Hoffman', 'John', ''], dtype=object)
array(['Holman', 'Derek', ''], dtype=object)
array(['Holwerda', 'Benne Willem', ''], dtype=object)
array(['Horton', 'Anthony', ''], dtype=object)
array(['Hummels', 'Cameron', ''], dtype=object)
array(['Jacobs', 'Daniel', ''], dtype=object)
array(['Jensen', 'Jens Juel', ''], dtype=object)
array(['Jones', 'David', ''], dtype=object)
array(['Karick', 'Arna', ''], dtype=object)
array(['Kelley', 'Luke', ''], dtype=object)
array(['Kenworthy', 'Matthew', ''], dtype=object)
array(['Kitchener', 'Ben', ''], dtype=object)
array(['Klaes', 'Dominik', ''], dtype=object)
array(['Kohn', 'Saul', ''], dtype=object)
array(['Konorski', 'Piotr', ''], dtype=object)
array(['Krawczyk', 'Coleman', ''], dtype=object)
array(['Kuehn', 'Kyler', ''], dtype=object)
array(['Kuutma', 'Teet', ''], dtype=object)
array(['Lam', 'Michael T.', ''], dtype=object)
array(['Lane', 'Richard', ''], dtype=object)
array(['Liske', 'Jochen', ''], dtype=object)
array(['Lopez-Camara', 'Diego', ''], dtype=object)
array(['Mack', 'Katherine', ''], dtype=object)
array(['Mangham', 'Sam', ''], dtype=object)
array(['Mao', 'Qingqing', ''], dtype=object)
array(['Marsh', 'David J. E.', ''], dtype=object)
array(['Mateu', 'Cecilia', ''], dtype=object)
array(['Maurin', 'Loïc', ''], dtype=object)
array(['McCormac', 'James', ''], dtype=object)
array(['Momcheva', 'Ivelina', ''], dtype=object)
array(['Monteiro', 'Hektor', ''], dtype=object)
array(['Mueller', 'Michael', ''], dtype=object)
array(['Munoz', 'Roberto', ''], dtype=object)
array(['Naidu', 'Rohan', ''], dtype=object)
array(['Nelson', 'Nicholas', ''], dtype=object)
array(['Nitschelm', 'Christian', ''], dtype=object)
array(['North', 'Chris', ''], dtype=object)
array(['Nunez-Iglesias', 'Juan', ''], dtype=object)
array(['Ogaz', 'Sara', ''], dtype=object)
array(['Owen', 'Russell', ''], dtype=object)
array(['Parejko', 'John', ''], dtype=object)
array(['Patrício', 'Vera', ''], dtype=object)
array(['Pepper', 'Joshua', ''], dtype=object)
array(['Perrin', 'Marshall', ''], dtype=object)
array(['Pickering', 'Timothy', ''], dtype=object)
array(['Piscionere', 'Jennifer', ''], dtype=object)
array(['Pogge', 'Richard', ''], dtype=object)
array(['Poleski', 'Radek', ''], dtype=object)
array(['Pourtsidou', 'Alkistis', ''], dtype=object)
array(['Price-Whelan', 'Adrian M.', ''], dtype=object)
array(['Rawls', 'Meredith L.', ''], dtype=object)
array(['Read', 'Shaun', ''], dtype=object)
array(['Rees', 'Glen', ''], dtype=object)
array(['Rein', 'Hanno', ''], dtype=object)
array(['Rice', 'Thomas', ''], dtype=object)
array(['Riemer-Sørensen', 'Signe', ''], dtype=object)
array(['Rusomarov', 'Naum', ''], dtype=object)
array(['Sanchez', 'Sebastian F.', ''], dtype=object)
array(['Santander-García', 'Miguel', ''], dtype=object)
array(['Sarid', 'Gal', ''], dtype=object)
array(['Schoenell', 'William', ''], dtype=object)
array(['Scholz', 'Aleks', ''], dtype=object)
array(['Schuhmann', 'Robert L.', ''], dtype=object)
array(['Schuster', 'William', ''], dtype=object)
array(['Scicluna', 'Peter', ''], dtype=object)
array(['Seidel', 'Marja', ''], dtype=object)
array(['Shao', 'Lijing', ''], dtype=object)
array(['Sharma', 'Pranav', ''], dtype=object)
array(['Shulevski', 'Aleksandar', ''], dtype=object)
array(['Shupe', 'David', ''], dtype=object)
array(['Sifón', 'Cristóbal', ''], dtype=object)
array(['Simmons', 'Brooke', ''], dtype=object)
array(['Sinha', 'Manodeep', ''], dtype=object)
array(['Skillen', 'Ian', ''], dtype=object)
array(['Soergel', 'Bjoern', ''], dtype=object)
array(['Spriggs', 'Thomas', ''], dtype=object)
array(['Srinivasan', 'Sundar', ''], dtype=object)
array(['Stevens', 'Abigail', ''], dtype=object)
array(['Streicher', 'Ole', ''], dtype=object)
array(['Suchyta', 'Eric', ''], dtype=object)
array(['Tan', 'Joshua', ''], dtype=object)
array(['Telford', 'O. Grace', ''], dtype=object)
array(['Thomas', 'Romain', ''], dtype=object)
array(['Tonini', 'Chiara', ''], dtype=object)
array(['Tremblay', 'Grant', ''], dtype=object)
array(['Tuttle', 'Sarah', ''], dtype=object)
array(['Urrutia', 'Tanya', ''], dtype=object)
array(['Vaughan', 'Sam', ''], dtype=object)
array(['Verdugo', 'Miguel', ''], dtype=object)
array(['Wagner', 'Alexander', ''], dtype=object)
array(['Walawender', 'Josh', ''], dtype=object)
array(['Wetzel', 'Andrew', ''], dtype=object)
array(['Willett', 'Kyle', ''], dtype=object)
array(['Williams', 'Peter K. G.', ''], dtype=object)
array(['Yang', 'Guang', ''], dtype=object)
array(['Zhu', 'Guangtun', ''], dtype=object)
array(['Zonca', 'Andrea', ''], dtype=object)]
|
6,602 |
1902.06709
|
Chethan Krishnan
|
Chethan Krishnan
|
Bulk Locality and Asymptotic Causal Diamonds
|
v2: published version; v3: minor errors fixed
|
SciPost Phys. 7, 057 (2019)
|
10.21468/SciPostPhys.7.4.057
| null |
hep-th gr-qc quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In AdS/CFT, the non-uniqueness of the reconstructed bulk from boundary
subregions has motivated the notion of code subspaces. We present some closely
related structures that arise in flat space. A useful organizing idea is that
of an {\em asymptotic} causal diamond (ACD): a causal diamond attached to the
conformal boundary of Minkowski space. The space of ACDs is defined by pairs of
points, one each on the future and past null boundaries, ${\cal I}^{\pm}$. We
observe that for flat space with an IR cut-off, this space (a) encodes a
preferred class of boundary ``subregions'', (b) is a plausible way to capture
holographic data for local bulk reconstruction, (c) has a natural
interpretation as the kinematic space for holography, (d) leads to a
holographic entanglement entropy in flat space that matches previous
definitions and satisfies strong sub-additivity, and, (e) has a bulk
union/intersection structure isomorphic to the one that motivated the
introduction of quantum error correction in AdS/CFT. By sliding the cut-off, we
also note one substantive way in which flat space holography differs from that
in AdS. Even though our discussion is centered around flat space (and AdS), we
note that there are notions of ACDs in other spacetimes as well. They could
provide a covariant way to abstractly characterize tensor sub-factors of
Hilbert spaces of holographic theories.
|
[{'version': 'v1', 'created': 'Mon, 18 Feb 2019 18:26:24 GMT'}
{'version': 'v2', 'created': 'Sun, 11 Aug 2019 17:21:44 GMT'}
{'version': 'v3', 'created': 'Thu, 4 Aug 2022 16:00:27 GMT'}]
|
2022-08-05
|
[array(['Krishnan', 'Chethan', ''], dtype=object)]
|
6,603 |
1812.06893
|
Vladimir Lenok
|
V. Lenok, P.A. Bezyazeekov, N.M. Budnev, D. Chernykh, O. Fedorov, O.A.
Gress, A. Haungs, R. Hiller, T. Huege, Y. Kazarina, M. Kleifges, D. Kostunin,
E.E. Korosteleva, L.A. Kuzmichev, N. Lubsandorzhiev, T. Marshalkina, R.
Monkhoev, E. Osipova, A. Pakhorukov, L. Pankov, V.V. Prosin, F.G. Schr\"oder,
D. Shipilov and A. Zagorodnikov
|
Current Status and New Challenges of The Tunka Radio Extension
|
Proceedings of E+CRS 2018
| null |
10.1088/1742-6596/1181/1/012027
| null |
astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Tunka Radio Extension (Tunka-Rex) is an antenna array spread over an area
of about 1~km$^2$. The array is placed at the Tunka Advanced Instrument for
cosmic rays and Gamma Astronomy (TAIGA) and detects the radio emission of air
showers in the band of 30 to 80~MHz. During the last years it was shown that a
sparse array such as Tunka-Rex is capable of reconstructing the parameters of
the primary particle as accurate as the modern instruments. Based on these
results we continue developing our data analysis. Our next goal is the
reconstruction of cosmic-ray energy spectrum observed only by a radio
instrument. Taking a step towards it, we develop a model of aperture of our
instrument and test it against hybrid TAIGA observations and Monte-Carlo
simulations. In the present work we give an overview of the current status and
results for the last five years of operation of Tunka-Rex and discuss prospects
of the cosmic-ray energy estimation with sparse radio arrays.
|
[{'version': 'v1', 'created': 'Mon, 17 Dec 2018 17:00:09 GMT'}
{'version': 'v2', 'created': 'Thu, 17 Jan 2019 16:01:30 GMT'}]
|
2019-05-22
|
[array(['Lenok', 'V.', ''], dtype=object)
array(['Bezyazeekov', 'P. A.', ''], dtype=object)
array(['Budnev', 'N. M.', ''], dtype=object)
array(['Chernykh', 'D.', ''], dtype=object)
array(['Fedorov', 'O.', ''], dtype=object)
array(['Gress', 'O. A.', ''], dtype=object)
array(['Haungs', 'A.', ''], dtype=object)
array(['Hiller', 'R.', ''], dtype=object)
array(['Huege', 'T.', ''], dtype=object)
array(['Kazarina', 'Y.', ''], dtype=object)
array(['Kleifges', 'M.', ''], dtype=object)
array(['Kostunin', 'D.', ''], dtype=object)
array(['Korosteleva', 'E. E.', ''], dtype=object)
array(['Kuzmichev', 'L. A.', ''], dtype=object)
array(['Lubsandorzhiev', 'N.', ''], dtype=object)
array(['Marshalkina', 'T.', ''], dtype=object)
array(['Monkhoev', 'R.', ''], dtype=object)
array(['Osipova', 'E.', ''], dtype=object)
array(['Pakhorukov', 'A.', ''], dtype=object)
array(['Pankov', 'L.', ''], dtype=object)
array(['Prosin', 'V. V.', ''], dtype=object)
array(['Schröder', 'F. G.', ''], dtype=object)
array(['Shipilov', 'D.', ''], dtype=object)
array(['Zagorodnikov', 'A.', ''], dtype=object)]
|
6,604 |
1802.02056
|
Costantino Sigismondi
|
Costantino Sigismondi
|
Differential refraction, 2017 winter solstice timing and true ecliptic
obliquity measured at the meridian line of Santa Maria degli Angeli in Rome
|
9 pages, 2 figure, 4 links to video of the phenomenon. In Italian
with extended English abstract
| null | null | null |
physics.pop-ph physics.hist-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The declination of the Sun along the year varies according to a sinusoid.
Around the solstices this curve is approximated by a parabola. In kinematics a
parabola is obtained with a constant acceleration. This acceleration has been
estimated in the days 21-29 December 2017, from the measurements taken at the
meridian line in the Basilica of Santa Maria degli Angeli in Rome made by
Francesco Bianchini in 1702 with purpose of measuring the variation of the
obliquity of the ecliptic. The parabola equation is fitted to the data to
obtain the solstice's instant with an accuracy of one hour. The departure of
the measures is within 4 arcsec (the daytime seeing during these solar
transits) from the ephemerides of IMCCE. The pipeline of the algorithm used to
obtain the angular data of the center of the Sun, starting from the ground
measurements affected by the atmospheric refraction, and corrected by the
Cassini equation, is described. Bianchini in 1703 reduced the error on the
solstices timings by using the difference in right ascension between the Sun
and a star observed at the same meridian line even in daytime (as he did with
Sirius in June-July 1703). The present one is an absolute measurement, without
stellar references. The meridian diameter is averagely measured 24 arcsec less
than the true value, with 20 arcsec of standard deviation, because of different
luminosity contrasts in the sky and in the Basilica. Conversely the center of
the image is much better defined (the contrast acts symmetrically without
moving the center of the image), allowing an accuracy to the nearest arcsecond
in the determination of the true obliquity.
|
[{'version': 'v1', 'created': 'Sat, 30 Dec 2017 00:04:45 GMT'}]
|
2018-02-07
|
[array(['Sigismondi', 'Costantino', ''], dtype=object)]
|
6,605 |
1408.2644
|
Matthias Silbernagl
|
Matthias Silbernagl, Matthias Huber, Ren\'e Brandenberg
|
Improving Accuracy and Efficiency of Start-up Cost Formulations in MIP
Unit Commitment by Modeling Power Plant Temperatures
|
9 pages, 5 figures, 1 table, data sets
| null | null | null |
math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper presents an improved mixed-integer model for the Thermal Unit
Commitment Problem. By introducing new variables for the temperature of each
thermal unit, the off-time-dependent start-up costs are modeled accurately and
with a lower integrality gap than state-of-the-art formulations. This new
approach significantly improves computational efficiency compared to existing
formulations, even if they only model a rough approximation of the start-up
costs. Our findings were validated on real-world test cases using CPLEX.
|
[{'version': 'v1', 'created': 'Tue, 12 Aug 2014 07:26:39 GMT'}
{'version': 'v2', 'created': 'Thu, 14 Aug 2014 20:16:11 GMT'}
{'version': 'v3', 'created': 'Wed, 3 Jun 2015 10:56:04 GMT'}
{'version': 'v4', 'created': 'Fri, 26 Jun 2015 14:56:47 GMT'}]
|
2015-06-29
|
[array(['Silbernagl', 'Matthias', ''], dtype=object)
array(['Huber', 'Matthias', ''], dtype=object)
array(['Brandenberg', 'René', ''], dtype=object)]
|
6,606 |
2109.13617
|
Junfeng Chen
|
Junfeng Chen, Yuan Gao, Junjie Hu, Fuqin Deng and Tin Lun Lam
|
Meta Reinforcement Learning Based Sensor Scanning in 3D Uncertain
Environments for Heterogeneous Multi-Robot Systems
|
6 pages, 9 figures
| null | null | null |
cs.RO
|
http://creativecommons.org/licenses/by/4.0/
|
We study a novel problem that tackles learning based sensor scanning in 3D
and uncertain environments with heterogeneous multi-robot systems. Our
motivation is two-fold: first, 3D environments are complex, the use of
heterogeneous multi-robot systems intuitively can facilitate sensor scanning by
fully taking advantage of sensors with different capabilities. Second, in
uncertain environments (e.g. rescue), time is of great significance. Since the
learning process normally takes time to train and adapt to a new environment,
we need to find an effective way to explore and adapt quickly. To this end, in
this paper, we present a meta-learning approach to improve the exploration and
adaptation capabilities. The experimental results demonstrate our method can
outperform other methods by approximately 15%-27% on success rate and 70%-75%
on adaptation speed.
|
[{'version': 'v1', 'created': 'Tue, 28 Sep 2021 11:21:31 GMT'}]
|
2021-09-29
|
[array(['Chen', 'Junfeng', ''], dtype=object)
array(['Gao', 'Yuan', ''], dtype=object)
array(['Hu', 'Junjie', ''], dtype=object)
array(['Deng', 'Fuqin', ''], dtype=object)
array(['Lam', 'Tin Lun', ''], dtype=object)]
|
6,607 |
2305.06930
|
Si Li
|
Xin-Yue Kang, Jin-Yang Li, and Si Li
|
Multiple Types of Unconventional Quasiparticles in Chiral Crystal
CsBe$_2$F$_5$
|
5 pages, 4 figures
| null | null | null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently, unconventional topological quasiparticles have been attracting
significant research interest in condensed matter physics. Here, based on
first-principles calculations and symmetry analysis, we reveal the coexistence
of multiple types of interesting unconventional topological quasiparticles in
the phonon spectrum of chiral crystal CsBe$_2$F$_5$. Specifically, we
identified eight entangled phonon bands in CsBe$_2$F$_5$, which gave rise to
various unconventional topological quasiparticles, including the spin-1 Weyl
point, the charge-2 Dirac point, the nodal surface, and the novel hourglass
nodal loop. We demonstrate that these unconventional topological quasiparticles
are protected by crystal symmetry. We show that there are two large Fermi arcs
connecting projections of the bulk spin-1 Weyl point and charge-2 Dirac point
on the (001) surface and across the entire surface Brillouin zone (BZ). Our
work not only elucidate the intriguing topological properties of chiral
crystals but also provides an excellent material platform for exploring the
fascinating physics associated with multiple types of unconventional
topological quasiparticles.
|
[{'version': 'v1', 'created': 'Thu, 11 May 2023 16:10:37 GMT'}
{'version': 'v2', 'created': 'Tue, 16 May 2023 14:20:20 GMT'}
{'version': 'v3', 'created': 'Wed, 17 May 2023 05:23:16 GMT'}]
|
2023-05-18
|
[array(['Kang', 'Xin-Yue', ''], dtype=object)
array(['Li', 'Jin-Yang', ''], dtype=object)
array(['Li', 'Si', ''], dtype=object)]
|
6,608 |
astro-ph/9712292
|
Osmi Vilhu
|
O. Vilhu, P. Muhli, J. Huovelin, P. Hakala, S.M. Rucinski and A.
Collier Cameron
|
UV Spectroscopy of AB Doradus with the Hubble Space Telescope. Impulsive
flares and bimodal profiles of the CIV 1549 line in a young star
|
to be published in AJ (April 98), 3 tables and 7 figures as separate
PS-files, print Table 2 as a landscape
| null |
10.1086/300268
| null |
astro-ph
| null |
We observed AB Doradus, a young and active late type star (K0 - K2 IV-V, P=
0.514 d) with the Goddard High Resolution Spectrograph of the post-COSTAR
Hubble Space Telescope with the time and spectral resolutions of 27 s and 15
km, respectively. The wavelength band (1531 - 1565 A) included the strong CIV
doublet (1548.202 and 1550.774, formed in the transition region at 100 000 K).
The mean quiescent CIV flux state was close to the saturated value and 100
times the solar one. The line profile (after removing the rotational and
instrumental profiles) is bimodal consisting of two Gaussians, narrow (FWHM =
70 km/s) and broad (FWHM =330km/s). This bimodality is probably due to two
separate broadening mechanisms and velocity fields at the coronal base. It is
possible that TR transient events (random multiple velocities), with a large
surface coverage, give rise to the broadening of the narrow component,while
true microflaring is responsible for the broad one.
The transition region was observed to flare frequently on different time
scales and magnitudes. The largest impulsive flare seen in the CIV 1549
emission reached in less than one minute the peak differential emission measure
(10**51.2 cm-3) and returned exponentially in 5 minutes to the 7 times lower
quiescent level.The 3 min average line profile of the flare was blue-shifted
(-190 km/s) and broadened (FWHM = 800 km/s). This impulsive flare could have
been due to a chromospheric heating and subsequent evaporation by an electron
beam, accelerated (by reconnection) at the apex of a coronal loop.
|
[{'version': 'v1', 'created': 'Mon, 22 Dec 1997 12:47:10 GMT'}]
|
2009-10-30
|
[array(['Vilhu', 'O.', ''], dtype=object)
array(['Muhli', 'P.', ''], dtype=object)
array(['Huovelin', 'J.', ''], dtype=object)
array(['Hakala', 'P.', ''], dtype=object)
array(['Rucinski', 'S. M.', ''], dtype=object)
array(['Cameron', 'A. Collier', ''], dtype=object)]
|
6,609 |
1310.4018
|
Pascal Maillard
|
Itai Benjamini and Pascal Maillard
|
Point-to-point distance in first passage percolation on (tree) x Z
|
4 pages, published version
|
Geometric Aspects of Functional Analysis, Israel Seminar (GAFA)
2011-2013, Klartag, Bo'az, Milman, Emanuel (Eds.), Lecture Notes in
Mathematics, Vol. 2116, Springer, 2014
|
10.1007/978-3-319-09477-9
| null |
math.PR math.MG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider first passage percolation (FPP) on T_d x Z, where T_d is the
d-regular tree (d>=3). It is shown that for a fixed vertex v in the tree, the
fluctuation of the distance in the FPP metric between the points (v,0) and
(v,n) is of the order of at most log n. We conjecture that the real
fluctuations are of order 1 and explain why.
|
[{'version': 'v1', 'created': 'Tue, 15 Oct 2013 11:59:06 GMT'}
{'version': 'v2', 'created': 'Tue, 19 Jun 2018 16:37:00 GMT'}]
|
2018-06-20
|
[array(['Benjamini', 'Itai', ''], dtype=object)
array(['Maillard', 'Pascal', ''], dtype=object)]
|
6,610 |
2107.05860
|
Lidia Aceto
|
Lidia Aceto and Paolo Novati
|
Exponentially convergent trapezoidal rules to approximate fractional
powers of operators
| null | null | null | null |
math.NA cs.NA
|
http://creativecommons.org/publicdomain/zero/1.0/
|
In this paper we are interested in the approximation of fractional powers of
self-adjoint positive operators. Starting from the integral representation of
the operators, we apply the trapezoidal rule combined with a single-exponential
and a double-exponential transform of the integrand function. For the first
approach our aim is only to review some theoretical aspects in order to refine
the choice of the parameters that allow a faster convergence. As for the double
exponential transform, in this work we show how to improve the existing error
estimates for the scalar case and also extend the analysis to operators. We
report some numerical experiments to show the reliability of the estimates
obtained.
|
[{'version': 'v1', 'created': 'Tue, 13 Jul 2021 05:49:25 GMT'}]
|
2021-07-14
|
[array(['Aceto', 'Lidia', ''], dtype=object)
array(['Novati', 'Paolo', ''], dtype=object)]
|
6,611 |
0908.1870
|
Francesco Hautmann
|
M. Deak, F. Hautmann, H. Jung and K. Kutak
|
Jets in the forward region at the LHC
|
Presented at the XLIV Rencontres de Moriond, March 2009
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss jet production at forward rapidities at the LHC. In this region
QCD logarithmic corrections in the hard transverse momentum and in the large
rapidity interval may both be quantitatively significant. We describe results
of using high-energy factorization techniques, which allow one to take into
account both kinds of corrections to higher orders in QCD.
|
[{'version': 'v1', 'created': 'Thu, 13 Aug 2009 11:04:35 GMT'}]
|
2009-08-14
|
[array(['Deak', 'M.', ''], dtype=object)
array(['Hautmann', 'F.', ''], dtype=object)
array(['Jung', 'H.', ''], dtype=object)
array(['Kutak', 'K.', ''], dtype=object)]
|
6,612 |
hep-ph/9311230
|
Razumov Leonid
|
M. Pl\"umer, L.V. Razumov, R.M. Weiner
|
Bounds for Bose-Einstein Correlation Functions
|
7 pages, LaTeX, DMR-THEP-93-5/W
|
Phys.Rev. D49 (1994) 4434-4437
|
10.1103/PhysRevD.49.4434
| null |
hep-ph nucl-th
| null |
Bounds for the correlation functions of identical bosons are discussed for
the general case of a Gaussian density matrix. In particular, for a purely
chaotic system the two-particle correlation function must always be greater
than one. On the other hand, in the presence of a coherent component the
correlation function may take values below unity. The experimental situation is
briefly discussed.
|
[{'version': 'v1', 'created': 'Fri, 5 Nov 1993 10:32:02 GMT'}]
|
2009-10-22
|
[array(['Plümer', 'M.', ''], dtype=object)
array(['Razumov', 'L. V.', ''], dtype=object)
array(['Weiner', 'R. M.', ''], dtype=object)]
|
6,613 |
0909.3891
|
Michael Neely
|
Michael J. Neely
|
Stock Market Trading Via Stochastic Network Optimization
|
14 pages
| null | null | null |
q-fin.PM q-fin.CP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the problem of dynamic buying and selling of shares from a
collection of $N$ stocks with random price fluctuations. To limit investment
risk, we place an upper bound on the total number of shares kept at any time.
Assuming that prices evolve according to an ergodic process with a mild
decaying memory property, and assuming constraints on the total number of
shares that can be bought and sold at any time, we develop a trading policy
that comes arbitrarily close to achieving the profit of an ideal policy that
has perfect knowledge of future events. Proximity to the optimal profit comes
with a corresponding tradeoff in the maximum required stock level and in the
timescales associated with convergence. We then consider arbitrary (possibly
non-ergodic) price processes, and show that the same algorithm comes close to
the profit of a frame based policy that can look a fixed number of slots into
the future. Our analysis uses techniques of Lyapunov Optimization that we
originally developed for stochastic network optimization problems.
|
[{'version': 'v1', 'created': 'Tue, 22 Sep 2009 02:11:24 GMT'}]
|
2009-09-23
|
[array(['Neely', 'Michael J.', ''], dtype=object)]
|
6,614 |
1705.03657
|
Pak-Hin Thomas Tam
|
Shao-Qiang Xi (NJU), Pak-Hin Thomas Tam (SYSU), Fang-Kun Peng and
Xiang-Yu Wang (NJU)
|
Search for GeV counterparts to fast radio bursts with Fermi
|
12 pages, 2 figures, 2 tables, ApJ Letters, in press
| null |
10.3847/2041-8213/aa74cf
| null |
astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The non-repeating fast radio bursts (FRBs) could arise from catastrophic
stellar explosions or magnetar giant flares, so relativistic blast waves might
be produced in these events. Motivated by this, we here search for GeV
counterparts to all non-repeating FRBs with Fermi Large Area Telescope (LAT),
including FRB 131104 that is claimed to be possibly associated with a gamma-ray
transient candidate detected by Swift Burst Alert Telescope (BAT). FRB 131104
enters the field of view (FoV) of LAT ~5000s after the burst time, so we are
only able to search for the GeV afterglow emission during this period, but no
significant GeV emission is detected. We also perform a search for GeV
emissions from other FRBs, but no significant GeV emissions are detected
either. Upper limit fluences in the range of (4.7-29.2)x10^(-7) erg/cm2 are
obtained, and then the upper limits of the isotropic blast wave kinetic energy
of about (1-200)x10^(53) erg are inferred under certain assumptions. Although
the current limits on the isotropic blast wave energy are not sufficiently
stringent to rule out the connection between FRBs and GRB-like transients,
future more sensitive observations with Fermi or Imaging Atmospheric Cherenkov
Telescopes might be able to constrain the connection.
|
[{'version': 'v1', 'created': 'Wed, 10 May 2017 08:25:52 GMT'}]
|
2017-06-28
|
[array(['Xi', 'Shao-Qiang', '', 'NJU'], dtype=object)
array(['Tam', 'Pak-Hin Thomas', '', 'SYSU'], dtype=object)
array(['Peng', 'Fang-Kun', '', 'NJU'], dtype=object)
array(['Wang', 'Xiang-Yu', '', 'NJU'], dtype=object)]
|
6,615 |
1912.04666
|
Jos\'e Miguel Zapata
|
Michael Kupper, Jos\'e Miguel Zapata
|
Large deviations built on max-stability
| null | null | null | null |
math.FA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we show that the basic results in large deviations theory hold
for general monetary risk measures, which satisfy the crucial property of
max-stability. A max-stable monetary risk measure fulfills a lattice
homomorphism property, and satisfies under a suitable tightness condition the
Laplace Principle (LP), that is, admits a dual representation with affine
convex conjugate. By replacing asymptotic concentration of probability by
concentration of risk, we formulate a Large Deviation Principle (LDP) for
max-stable monetary risk measures, and show its equivalence to the LP. In
particular, the special case of the asymptotic entropic risk measure
corresponds to the classical Varadhan-Bryc equivalence between the LDP and LP.
The main results are illustrated by the asymptotic shortfall risk measure.
|
[{'version': 'v1', 'created': 'Tue, 10 Dec 2019 12:48:30 GMT'}
{'version': 'v2', 'created': 'Mon, 23 Mar 2020 22:16:01 GMT'}
{'version': 'v3', 'created': 'Tue, 18 Aug 2020 11:03:17 GMT'}]
|
2020-08-19
|
[array(['Kupper', 'Michael', ''], dtype=object)
array(['Zapata', 'José Miguel', ''], dtype=object)]
|
6,616 |
math-ph/0011010
|
Simone Warzel
|
Thomas Hupfer, Hajo Leschke, and Simone Warzel
|
Upper bounds on the density of states of single Landau levels broadened
by Gaussian random potentials
|
16 pages, to appear in "Journal of Mathematical Physics"
|
Journal of Mathematical Physics 42 (2001) 5626-5641
|
10.1063/1.1401138
| null |
math-ph cond-mat.dis-nn cond-mat.mes-hall math.MP
| null |
We study a non-relativistic charged particle on the Euclidean plane R^2
subject to a perpendicular constant magnetic field and an R^2-homogeneous
random potential in the approximation that the corresponding random Landau
Hamiltonian on the Hilbert space L^2(R^2) is restricted to the eigenspace of a
single but arbitrary Landau level. For a wide class of Gaussian random
potentials we rigorously prove that the associated restricted integrated
density of states is absolutely continuous with respect to the Lebesgue
measure. We construct explicit upper bounds on the resulting derivative, the
restricted density of states. As a consequence, any given energy is seen to be
almost surely not an eigenvalue of the restricted random Landau Hamiltonian.
|
[{'version': 'v1', 'created': 'Tue, 7 Nov 2000 11:14:29 GMT'}
{'version': 'v2', 'created': 'Mon, 25 Jun 2001 17:04:25 GMT'}
{'version': 'v3', 'created': 'Thu, 11 Oct 2001 14:18:56 GMT'}]
|
2015-06-26
|
[array(['Hupfer', 'Thomas', ''], dtype=object)
array(['Leschke', 'Hajo', ''], dtype=object)
array(['Warzel', 'Simone', ''], dtype=object)]
|
6,617 |
1803.03275
|
Chiara Spiniello
|
V. Pota, N. R. Napolitano, M. Hilker, M. Spavone, C. Schulz, Michele
Cantiello, C. Tortora, E. Iodice, M. Paolillo, R. D'Abrusco, M. Capaccioli,
T. Puzia, R. F. Peletier, A. J. Romanowsky, G. van de Ven, C. Spiniello, M.
Norris, T. Lisker, R. Munoz, P. Schipani, P. Eigenthaler, M. A. Taylor, R.
S\'anchez-Janssen, Y. Ordenes-Brice\~no
|
The Fornax Cluster VLT Spectroscopic Survey. I - VIMOS spectroscopy of
compact stellar systems in the Fornax core region
|
13 pages, 9 figures, submitted to MNRAS, companion paper FVSS-II
(Spiniello et al. 2018, submitted)
| null |
10.1093/mnras/sty2149
| null |
astro-ph.GA astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present the results of a wide spectroscopic survey aimed at detecting
extragalactic globular clusters (GCs) in the core of the Fornax cluster. About
4500 low resolution spectra (from 4800 to 10000 \AA ) were observed in 25
VLT/VIMOS masks covering the central 1 deg$^{2}$ around the dominant galaxy NGC
1399 corresponding to $\sim$175 kpc galactocentric radius. We describe the
methodology used for data reduction and data analysis. We found a total of 387
unique physical objects (372 GCs and 15 ultra compact dwarfs) in the field
covered by our observations. Most of these objects are associated with NGC
1399, with only 10% likely belonging to other giant galaxies. The new VIMOS
dataset is complementary to the many GC catalogues already present in the
literature and it brings the total number of tracer particles around NGC 1399
to more than 1130 objects. With this comprehensive radial velocity sample we
have found that the velocity dispersion of the GC population (equally for red
and blue GC populations) shows a relatively sharp increase from low velocity
dispersion ($\sim250$-$350$ kms$^{-1}$) to high velocity dispersion
($\sim300$-$400$ kms$^{-1}$) at projected radius of $\approx10$ arcmin
($\sim60$ kpc) from the galaxy centre. This suggests that at a projected radius
of $\approx60$ kpc both blue and red GC populations begin to be governed by the
dominating Fornax cluster potential, rather than by the central NGC 1399 galaxy
potential. This kinematic evidence corroborates similar results found using
surface brightness analysis and planetary nebulae kinematics.
|
[{'version': 'v1', 'created': 'Thu, 8 Mar 2018 19:00:29 GMT'}]
|
2018-08-15
|
[array(['Pota', 'V.', ''], dtype=object)
array(['Napolitano', 'N. R.', ''], dtype=object)
array(['Hilker', 'M.', ''], dtype=object)
array(['Spavone', 'M.', ''], dtype=object)
array(['Schulz', 'C.', ''], dtype=object)
array(['Cantiello', 'Michele', ''], dtype=object)
array(['Tortora', 'C.', ''], dtype=object)
array(['Iodice', 'E.', ''], dtype=object)
array(['Paolillo', 'M.', ''], dtype=object)
array(["D'Abrusco", 'R.', ''], dtype=object)
array(['Capaccioli', 'M.', ''], dtype=object)
array(['Puzia', 'T.', ''], dtype=object)
array(['Peletier', 'R. F.', ''], dtype=object)
array(['Romanowsky', 'A. J.', ''], dtype=object)
array(['van de Ven', 'G.', ''], dtype=object)
array(['Spiniello', 'C.', ''], dtype=object)
array(['Norris', 'M.', ''], dtype=object)
array(['Lisker', 'T.', ''], dtype=object)
array(['Munoz', 'R.', ''], dtype=object)
array(['Schipani', 'P.', ''], dtype=object)
array(['Eigenthaler', 'P.', ''], dtype=object)
array(['Taylor', 'M. A.', ''], dtype=object)
array(['Sánchez-Janssen', 'R.', ''], dtype=object)
array(['Ordenes-Briceño', 'Y.', ''], dtype=object)]
|
6,618 |
2204.04658
|
Manoel Jarra
|
Manoel Jarra and Oliver Lorscheid
|
Flag matroids with coefficients
| null | null | null | null |
math.CO math.AG
|
http://creativecommons.org/licenses/by/4.0/
|
This paper is a direct generalization of Baker-Bowler theory to flag
matroids, including its moduli interpretation as developed by Baker and the
second author for matroids. More explicitly, we extend the notion of flag
matroids to flag matroids over any tract, provide cryptomorphic descriptions in
terms of basis axioms (Grassmann-Pl\"ucker functions), circuit/vector axioms
and dual pairs, including additional characterizations in the case of perfect
tracts. We establish duality of flag matroids and construct minors. Based on
the theory of ordered blue schemes, we introduce flag matroid bundles and
construct their moduli space, which leads to algebro-geometric descriptions of
duality and minors. Taking rational points recovers flag varieties in several
geometric contexts: over (topological) fields, in tropical geometry, and as a
generalization of the MacPhersonian.
|
[{'version': 'v1', 'created': 'Sun, 10 Apr 2022 11:25:28 GMT'}
{'version': 'v2', 'created': 'Wed, 24 Aug 2022 22:39:32 GMT'}]
|
2022-08-26
|
[array(['Jarra', 'Manoel', ''], dtype=object)
array(['Lorscheid', 'Oliver', ''], dtype=object)]
|
6,619 |
1511.00945
|
Bao-Feng Feng
|
Bao-Feng Feng, Liming Ling, Zuonong Zhu
|
A defocusing complex short pulse equation and its multi-dark soliton
solution by Darboux transformation
|
Accepted by Phys.Rev.E, 13 pages, 4 figures
|
Phys. Rev. E 93, 052227 (2016)
|
10.1103/PhysRevE.93.052227
| null |
nlin.SI math-ph math.MP physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we propose a complex short pulse equation of both focusing and
defocusing types, which governs the propagation of ultra-short pulses in
nonlinear optical fibers. It can be viewed as an analogue of the nonlinear
Schr\"odinger (NLS) equation in the ultra-short pulse regime. Furthermore, we
construct the multi-dark soliton solution for the defocusing complex short
pulse equation through the Darboux transformation and reciprocal (hodograph)
transformation. One- and two-dark soliton solutions are given explicitly, whose
properties and dynamics are analyzed and illustrated.
|
[{'version': 'v1', 'created': 'Tue, 3 Nov 2015 15:28:11 GMT'}
{'version': 'v2', 'created': 'Wed, 11 May 2016 06:43:01 GMT'}]
|
2016-06-01
|
[array(['Feng', 'Bao-Feng', ''], dtype=object)
array(['Ling', 'Liming', ''], dtype=object)
array(['Zhu', 'Zuonong', ''], dtype=object)]
|
6,620 |
2002.02259
|
Liqun Qi
|
Liqun Qi, Yannan Chen, Mayank Bakshi and Xinzhen Zhang
|
Triple Decomposition and Tensor Recovery of Third Order Tensors
| null | null | null | null |
math.NA cs.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we introduce a new tensor decomposition for third order
tensors, which decomposes a third order tensor to three third order low rank
tensors in a balanced way. We call such a decomposition the triple
decomposition, and the corresponding rank the triple rank. For a third order
tensor, its CP decomposition can be regarded as a special case of its triple
decomposition. The triple rank of a third order tensor is not greater than the
middle value of the Tucker rank, and is strictly less than the middle value of
the Tucker rank for an essential class of examples. These indicate that
practical data can be approximated by low rank triple decomposition as long as
it can be approximated by low rank CP or Tucker decomposition. This theoretical
discovery is confirmed numerically. Numerical tests show that third order
tensor data from practical applications such as internet traffic and video
image are of low triple ranks. A tensor recovery method based on low rank
triple decomposition is proposed. Its convergence and convergence rate are
established. Numerical experiments confirm the efficiency of this method.
|
[{'version': 'v1', 'created': 'Thu, 6 Feb 2020 13:54:43 GMT'}
{'version': 'v2', 'created': 'Wed, 12 Feb 2020 03:55:14 GMT'}
{'version': 'v3', 'created': 'Tue, 25 Feb 2020 13:35:45 GMT'}
{'version': 'v4', 'created': 'Sun, 1 Mar 2020 05:30:47 GMT'}]
|
2020-03-03
|
[array(['Qi', 'Liqun', ''], dtype=object)
array(['Chen', 'Yannan', ''], dtype=object)
array(['Bakshi', 'Mayank', ''], dtype=object)
array(['Zhang', 'Xinzhen', ''], dtype=object)]
|
6,621 |
1305.7378
|
Bin Qin
|
Tong-ning Hu, Yuan-ji Pei, Bin Qin, Qu-shan Chen
|
Beam tail effect of performance-enhanced EC-ITC RF gun
|
6 pages, 9 figures; Accepted by Chinese Physics C, 2013 May 29
| null |
10.1088/1674-1137/37/12/128101
| null |
physics.acc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Beam tail effect of multi-bunches will influence the electron beam
performances in high intensity thermionic RF gun. Beam dynamic calculations
that illustrate the working states of single and multi-pulse fed-in of
performance-enhanced EC-ITC (External Cathode Independent Tunable Cavity) RF
gun for FEL (Free Electron Laser) injector are performed to estimate extracted
bunch properties. By using both Parmela and homemade MATLAB codes, the effects
of single beam tail as well as interactions of multi-pulses are analyzed, where
ring-based electron algorithm is adopted to calculated RF fields and space
charge field. Furthermore, the procedure of unexpected deviated-energy
particles mixed with effective bunch head is described by MATLAB code as well.
As a result, performance-enhanced EC-ITC RF gun is proved to have the
capability to extract continual stable bunches which are suitable for high
requirement THz-FEL.
|
[{'version': 'v1', 'created': 'Fri, 31 May 2013 12:41:46 GMT'}]
|
2015-06-16
|
[array(['Hu', 'Tong-ning', ''], dtype=object)
array(['Pei', 'Yuan-ji', ''], dtype=object)
array(['Qin', 'Bin', ''], dtype=object)
array(['Chen', 'Qu-shan', ''], dtype=object)]
|
6,622 |
2101.04948
|
Foozhan Ataiefard
|
Foozhan Ataiefard, Mohammad Jafar Mashhadi, Hadi Hemmati and Niel
Walkinshaw
|
Deep State Inference: Toward Behavioral Model Inference of Black-box
Software Systems
|
17 pages,9 figures. arXiv admin note: text overlap with
arXiv:2008.11856
| null | null | null |
cs.LG cs.SE
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Many software engineering tasks, such as testing, and anomaly detection can
benefit from the ability to infer a behavioral model of the software.Most
existing inference approaches assume access to code to collect execution
sequences. In this paper, we investigate a black-box scenario, where the system
under analysis cannot be instrumented, in this granular fashion.This scenario
is particularly prevalent with control systems' log analysis in the form of
continuous signals. In this situation, an execution trace amounts to a
multivariate time-series of input and output signals, where different states of
the system correspond to different `phases` in the time-series. The main
challenge is to detect when these phase changes take place. Unfortunately, most
existing solutions are either univariate, make assumptions on the data
distribution, or have limited learning power.Therefore, we propose a hybrid
deep neural network that accepts as input a multivariate time series and
applies a set of convolutional and recurrent layers to learn the non-linear
correlations between signals and the patterns over time.We show how this
approach can be used to accurately detect state changes, and how the inferred
models can be successfully applied to transfer-learning scenarios, to
accurately process traces from different products with similar execution
characteristics. Our experimental results on two UAV autopilot case studies
indicate that our approach is highly accurate (over 90% F1 score for state
classification) and significantly improves baselines (by up to 102% for change
point detection).Using transfer learning we also show that up to 90% of the
maximum achievable F1 scores in the open-source case study can be achieved by
reusing the trained models from the industrial case and only fine tuning them
using as low as 5 labeled samples, which reduces the manual labeling effort by
98%.
|
[{'version': 'v1', 'created': 'Wed, 13 Jan 2021 09:23:37 GMT'}
{'version': 'v2', 'created': 'Tue, 12 Oct 2021 08:14:09 GMT'}]
|
2021-10-13
|
[array(['Ataiefard', 'Foozhan', ''], dtype=object)
array(['Mashhadi', 'Mohammad Jafar', ''], dtype=object)
array(['Hemmati', 'Hadi', ''], dtype=object)
array(['Walkinshaw', 'Niel', ''], dtype=object)]
|
6,623 |
math/0202081
|
Taras Panov
|
Taras Panov, Nigel Ray, and Rainer Vogt
|
Colimits, Stanley-Reisner algebras, and loop spaces
|
26 pages, LaTeX2e
|
Categorical decomposition techniques in algebraic topology (Isle
of Skye, 2001). Progress in Math. 215. Birkh\"auser, Basel, 2004, pp. 261-291
| null |
ITEP-TH-72/01
|
math.AT math.CO math.CT
| null |
We study diagrams associated with a finite simplicial complex K, in various
algebraic and topological categories. We relate their colimits to familiar
structures in algebra, combinatorics, geometry and topology. These include:
right-angled Artin and Coxeter groups (and their complex analogues, which we
call circulation groups); Stanley-Reisner algebras and coalgebras; Davis and
Januszkiewicz's spaces DJ(K) associated with toric manifolds and their
generalisations; and coordinate subspace arrangements. When K is a flag
complex, we extend well-known results on Artin and Coxeter groups by confirming
that the relevant circulation group is homotopy equivalent to the space of
loops $\Omega DJ(K)$. We define homotopy colimits for diagrams of topological
monoids and topological groups, and show they commute with the formation of
classifying spaces in a suitably generalised sense. We deduce that the homotopy
colimit of the appropriate diagram of topological groups is a model for $\Omega
DJ(K)$ for an arbitrary complex K, and that the natural projection onto the
original colimit is a homotopy equivalence when K is flag. In this case, the
two models are compatible.
|
[{'version': 'v1', 'created': 'Sat, 9 Feb 2002 17:41:41 GMT'}]
|
2010-10-22
|
[array(['Panov', 'Taras', ''], dtype=object)
array(['Ray', 'Nigel', ''], dtype=object)
array(['Vogt', 'Rainer', ''], dtype=object)]
|
6,624 |
2209.10288
|
Franz Heinsen
|
Franz A. Heinsen
|
Tree Methods for Hierarchical Classification in Parallel
|
Source code and instructions for replicating our results are online
at https://github.com/glassroom/heinsen_routing
| null | null | null |
cs.LG cs.AI
|
http://creativecommons.org/licenses/by/4.0/
|
We propose methods that enable efficient hierarchical classification in
parallel. Our methods transform a batch of classification scores and labels,
corresponding to given nodes in a semantic tree, to scores and labels
corresponding to all nodes in the ancestral paths going down the tree to every
given node, relying only on tensor operations that execute efficiently on
hardware accelerators. We implement our methods and test them on current
hardware accelerators with a tree incorporating all English-language synsets in
WordNet 3.0, spanning 117,659 classes in 20 levels of depth. We transform
batches of scores and labels to their respective ancestral paths, incurring
negligible computation and consuming only a fixed 0.04GB of memory over the
footprint of data.
|
[{'version': 'v1', 'created': 'Wed, 21 Sep 2022 12:03:49 GMT'}]
|
2022-09-22
|
[array(['Heinsen', 'Franz A.', ''], dtype=object)]
|
6,625 |
1908.02784
|
Kai Chen
|
Kai Chen, Zhongrui Lin, Jian Wan, Lei Xu, Chungen Xu
|
Multi-owner Secure Encrypted Search Using Searching Adversarial Networks
|
The 18th International Conference on Cryptology and Network Security.
Fixed minor issues with the conference version, such as spelling errors and
ambiguities in the content description
| null | null |
1908.02784
|
cs.CR cs.AI
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Searchable symmetric encryption (SSE) for multi-owner model draws much
attention as it enables data users to perform searches over encrypted cloud
data outsourced by data owners. However, implementing secure and precise query,
efficient search and flexible dynamic system maintenance at the same time in
SSE remains a challenge. To address this, this paper proposes secure and
efficient multi-keyword ranked search over encrypted cloud data for multi-owner
model based on searching adversarial networks. We exploit searching adversarial
networks to achieve optimal pseudo-keyword padding, and obtain the optimal game
equilibrium for query precision and privacy protection strength. Maximum
likelihood search balanced tree is generated by probabilistic learning, which
achieves efficient search and brings the computational complexity close to
$\mathcal{O}(\log N)$. In addition, we enable flexible dynamic system
maintenance with balanced index forest that makes full use of distributed
computing. Compared with previous works, our solution maintains query precision
above 95% while ensuring adequate privacy protection, and introduces low
overhead on computation, communication and storage.
|
[{'version': 'v1', 'created': 'Wed, 7 Aug 2019 18:17:33 GMT'}
{'version': 'v2', 'created': 'Sun, 11 Aug 2019 13:58:07 GMT'}]
|
2019-08-13
|
[array(['Chen', 'Kai', ''], dtype=object)
array(['Lin', 'Zhongrui', ''], dtype=object)
array(['Wan', 'Jian', ''], dtype=object)
array(['Xu', 'Lei', ''], dtype=object)
array(['Xu', 'Chungen', ''], dtype=object)]
|
6,626 |
1804.10205
|
Joan Garcia i Tormo
|
Joan Garcia i Tormo, Marika Taylor
|
Correlation functions in the D1-D5 orbifold CFT
|
34 pages, 3 figures; corrected typos, added reference
| null | null | null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The D1-D5 system has an orbifold point in its moduli space, at which it may
be described by an ${\cal N} = (4,4)$ supersymmetric sigma model with target
space $M^N/S(N)$ where $M$ is $\mathbb{T}^4$ or $K3$. In this paper we consider
correlation functions involving chiral operators constructed from twist fields:
we find explicit expressions for processes involving a twist $n$ operator
joining $n$ twist operators of arbitrary twist. These expressions are
universal, in that they are independent of the choice of $M$, and the final
results can be expressed in a compact form. We explain how these results are
relevant to the black hole microstate programme: one point functions of chiral
operators can be used to reconstruct AdS$_3$ near horizon regions of D1-D5
microstates and to match microstates constructed in supergravity with the CFT.
|
[{'version': 'v1', 'created': 'Thu, 26 Apr 2018 18:00:01 GMT'}
{'version': 'v2', 'created': 'Wed, 9 May 2018 08:45:58 GMT'}]
|
2018-05-10
|
[array(['Tormo', 'Joan Garcia i', ''], dtype=object)
array(['Taylor', 'Marika', ''], dtype=object)]
|
6,627 |
1401.6762
|
Yu-Kun Huang
|
Yu-Kun Huang, Pochung Chen, Ying-Jer Kao, and Tao Xiang
|
Long-time dynamics of quantum chains: transfer-matrix renormalization
group and entanglement of the maximal eigenvector
| null |
Phys. Rev. B 89, 201102(R) (2014)
|
10.1103/PhysRevB.89.201102
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
By using a different quantum-to-classical mapping from the Trotter-Suzuki
decomposition, we identify the entanglement structure of the maximal
eigenvectors for the associated quantum transfer matrix. This observation
provides a deeper insight into the problem of linear growth of the entanglement
entropy in time evolution using conventional methods. Based on this
observation, we propose a general method for arbitrary temperatures using the
biorthonormal transfer-matrix renormalization group. Our method exhibits a
competitive accuracy with a much cheaper computational cost in comparison with
two recent proposed methods for long-time dynamics based on a folding algorithm
[Phys. Rev. Lett. 102, 240603 (2009)] and a modified time-dependent
density-matrix renormalization group [Phys. Rev. Lett. 108, 227206 (2012)].
|
[{'version': 'v1', 'created': 'Mon, 27 Jan 2014 08:12:57 GMT'}]
|
2014-05-23
|
[array(['Huang', 'Yu-Kun', ''], dtype=object)
array(['Chen', 'Pochung', ''], dtype=object)
array(['Kao', 'Ying-Jer', ''], dtype=object)
array(['Xiang', 'Tao', ''], dtype=object)]
|
6,628 |
0709.3257
|
Sylvain Lombardy
|
Sylvain Lombardy (LIAFA), Jean Mairesse (LIAFA)
|
Series which are both max-plus and min-plus rational are unambiguous
| null |
RAIRO - Theoretical Informatics and Applications 40 (2006) 1-14
|
10.1051/ita:2005042
| null |
cs.DM
| null |
Consider partial maps from the free monoid into the field of real numbers
with a rational domain. We show that two families of such series are actually
the same: the unambiguous rational series on the one hand, and the max-plus and
min-plus rational series on the other hand. The decidability of equality was
known to hold in both families with different proofs, so the above unifies the
picture. We give an effective procedure to build an unambiguous automaton from
a max-plus automaton and a min-plus one that recognize the same series.
|
[{'version': 'v1', 'created': 'Thu, 20 Sep 2007 15:49:44 GMT'}]
|
2007-09-21
|
[array(['Lombardy', 'Sylvain', '', 'LIAFA'], dtype=object)
array(['Mairesse', 'Jean', '', 'LIAFA'], dtype=object)]
|
6,629 |
1801.01724
|
Fernando Adri\'an Fern\'andez Tojo
|
J. \'Angel Cid and F. Adri\'an F. Tojo
|
A Lipschitz condition along a transversal foliation implies local
uniqueness for ODEs
| null | null | null | null |
math.CA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We prove the following result: if a continuous vector field $F$ is Lipschitz
when restricted to the hypersurfaces determined by a suitable foliation and a
transversal condition is satisfied at the initial condition, then $F$
determines a locally unique integral curve. We also present some illustrative
examples and sufficient conditions in order to apply our main result.
|
[{'version': 'v1', 'created': 'Fri, 5 Jan 2018 11:51:46 GMT'}]
|
2018-01-08
|
[array(['Cid', 'J. Ángel', ''], dtype=object)
array(['Tojo', 'F. Adrián F.', ''], dtype=object)]
|
6,630 |
cond-mat/0309096
|
Urban Lundin
|
Huan-Qiang Zhou, Urban Lundin, Sam Young Cho, and Ross H. McKenzie
|
Measuring geometric phases of scattering states in nanoscale electronic
devices
|
Six pages two figures
|
Phys. Rev. B 69, 113308 (2004)
|
10.1103/PhysRevB.69.113308
| null |
cond-mat.mes-hall
| null |
We show how a new quantum property, a geometric phase, associated with
scattering states can be exhibited in nanoscale electronic devices. We propose
an experiment to use interference to directly measure the effect of the new
geometric phase. The setup involves a double path interferometer, adapted from
that used to measure the phase evolution of electrons as they traverse a
quantum dot (QD). Gate voltages on the QD could be varied cyclically and
adiabatically, in a manner similar to that used to observe quantum adiabatic
charge pumping. The interference due to the geometric phase results in
oscillations in the current collected in the drain when a small bias across the
device is applied. We illustrate the effect with examples of geometric phases
resulting from both Abelian and non-Abelian gauge potentials.
|
[{'version': 'v1', 'created': 'Thu, 4 Sep 2003 07:06:57 GMT'}
{'version': 'v2', 'created': 'Tue, 4 Nov 2003 06:40:05 GMT'}]
|
2007-05-23
|
[array(['Zhou', 'Huan-Qiang', ''], dtype=object)
array(['Lundin', 'Urban', ''], dtype=object)
array(['Cho', 'Sam Young', ''], dtype=object)
array(['McKenzie', 'Ross H.', ''], dtype=object)]
|
6,631 |
1801.01037
|
Ryan LaRose
|
Ryan LaRose
|
Distributed Memory Techniques for Classical Simulation of Quantum
Circuits
|
Fixed typos, minor reformatting
| null | null | null |
quant-ph cs.DC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we describe, implement, and test the performance of distributed
memory simulations of quantum circuits on the MSU Laconia Top500 supercomputer.
Using OpenMP and MPI hybrid parallelization, we first use a distributed
matrix-vector multiplication with one-dimensional partitioning and discuss the
shortcomings of this method due to the exponential memory requirements in
simulating quantum computers. We then describe a more efficient method that
stores only the $2^n$ amplitudes of the $n$ qubit state vector $|\psi\rangle$
and optimize its single node performance. In our multi-node implementation, we
use a single amplitude communication protocol that maximizes the number of
qubits able to be simulated and minimizes the ratio of qubits that require
communication to those that do not, and we present an algorithm for efficiently
determining communication pairs among processors. We simulate up to 30 qubits
on a single node and 33 qubits with the state vector partitioned across 64
nodes. Lastly, we discuss the advantages and disadvantages of our communication
scheme, propose potential improvements, and describe other optimizations such
as storing the state vector non-sequentially in memory to map communication
requirements to idle qubits in the circuit.
|
[{'version': 'v1', 'created': 'Tue, 2 Jan 2018 02:14:31 GMT'}
{'version': 'v2', 'created': 'Thu, 21 Jun 2018 22:37:02 GMT'}]
|
2018-06-25
|
[array(['LaRose', 'Ryan', ''], dtype=object)]
|
6,632 |
2003.14253
|
Tibor Toth-Katona
|
Ameer R.K. Nassrah, Istv\'an J\'anossy and Tibor T\'oth-Katona
|
Photoalignment at the nematic liquid crystal - polymer interface: the
importance of the liquid crystalline molecular structure
|
20 pages, 9 figures. arXiv admin note: text overlap with
arXiv:1903.05433
| null | null | null |
cond-mat.soft
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The influence of the molecular structure of the nematic liquid crystal (NLC)
on the photoalignment process at the NLC -- polymer interface has been
investigated experimentally. NLCs having exclusively phenyl-, or cyclohexane
rings in the rigid core, as well as NLCs containing both phenyl and cyclohexane
groups have been considered. Substantial differences have been found in the
photoalignment process depending on the molecular structure of the NLC,
supporting the assumption that the polymer -- NLC interface should be regarded
as a coupled system, where the two components mutually influence each other. A
phenomenological explanation is given for the observed differences.
|
[{'version': 'v1', 'created': 'Mon, 30 Mar 2020 13:33:04 GMT'}]
|
2020-04-01
|
[array(['Nassrah', 'Ameer R. K.', ''], dtype=object)
array(['Jánossy', 'István', ''], dtype=object)
array(['Tóth-Katona', 'Tibor', ''], dtype=object)]
|
6,633 |
1902.09513
|
Paul Voigtlaender
|
Paul Voigtlaender, Yuning Chai, Florian Schroff, Hartwig Adam, Bastian
Leibe, Liang-Chieh Chen
|
FEELVOS: Fast End-to-End Embedding Learning for Video Object
Segmentation
|
CVPR 2019 camera-ready version
|
IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
2019
| null | null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Many of the recent successful methods for video object segmentation (VOS) are
overly complicated, heavily rely on fine-tuning on the first frame, and/or are
slow, and are hence of limited practical use. In this work, we propose FEELVOS
as a simple and fast method which does not rely on fine-tuning. In order to
segment a video, for each frame FEELVOS uses a semantic pixel-wise embedding
together with a global and a local matching mechanism to transfer information
from the first frame and from the previous frame of the video to the current
frame. In contrast to previous work, our embedding is only used as an internal
guidance of a convolutional network. Our novel dynamic segmentation head allows
us to train the network, including the embedding, end-to-end for the multiple
object segmentation task with a cross entropy loss. We achieve a new state of
the art in video object segmentation without fine-tuning with a J&F measure of
71.5% on the DAVIS 2017 validation set. We make our code and models available
at https://github.com/tensorflow/models/tree/master/research/feelvos.
|
[{'version': 'v1', 'created': 'Mon, 25 Feb 2019 18:50:40 GMT'}
{'version': 'v2', 'created': 'Mon, 8 Apr 2019 13:50:21 GMT'}]
|
2019-04-09
|
[array(['Voigtlaender', 'Paul', ''], dtype=object)
array(['Chai', 'Yuning', ''], dtype=object)
array(['Schroff', 'Florian', ''], dtype=object)
array(['Adam', 'Hartwig', ''], dtype=object)
array(['Leibe', 'Bastian', ''], dtype=object)
array(['Chen', 'Liang-Chieh', ''], dtype=object)]
|
6,634 |
1511.04286
|
Geoffrey Dietz
|
Geoffrey D. Dietz
|
Axiomatic Closure Operations, Phantom Extensions, and Solidity
|
final revision; to appear in J. Algebra
| null |
10.1016/j.jalgebra.2018.01.023
| null |
math.AC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this article, we generalize a previously defined set of axioms for a
closure operation that induces balanced big Cohen-Macaulay modules. While the
original axioms were only defined in terms of finitely generated modules, these
new ones will apply to all modules over a local domain. The new axioms will
lead to a notion of phantom extensions for general modules, and we will prove
that all modules that are phantom extensions can be modified into balanced big
Cohen-Macaulay modules and are also solid modules. As a corollary, if $R$ has
characteristic $p>0$ and is $F$-finite, then all solid algebras are phantom
extensions. If $R$ also has a big test element (e.g., if $R$ is complete), then
solid algebras can be modified into balanced big Cohen-Macaulay modules.
(Hochster and Huneke have previously demonstrated that there exist solid
algebras that cannot be modified into balanced big Cohen-Macaulay algebras.) We
also point out that tight closure over local domains in characteristic $p$
generally satisfies the new axioms and that the existence of a big
Cohen-Macaulay module induces a closure operation satisfying the new axioms.
|
[{'version': 'v1', 'created': 'Fri, 13 Nov 2015 14:11:54 GMT'}
{'version': 'v2', 'created': 'Wed, 31 Jan 2018 15:14:43 GMT'}]
|
2018-02-01
|
[array(['Dietz', 'Geoffrey D.', ''], dtype=object)]
|
6,635 |
1901.03592
|
Anish Amarsi
|
A. M. Amarsi, P. E. Nissen, M. Asplund, K. Lind, P. S. Barklem
|
Carbon and oxygen in metal-poor halo stars
|
5 pages, 2 figures; published in A&A Letters
|
A&A 622, L4 (2019)
|
10.1051/0004-6361/201834480
| null |
astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Carbon and oxygen are key tracers of the Galactic chemical evolution; in
particular, a reported upturn in [C/O] towards decreasing [O/H] in metal-poor
halo stars could be a signature of nucleosynthesis by massive Population III
stars. We reanalyse carbon, oxygen, and iron abundances in thirty-nine
metal-poor turn-off stars. For the first time, we take into account
three-dimensional (3D) hydrodynamic effects together with departures from local
thermodynamic equilibrium (LTE) when determining both the stellar parameters
and the elemental abundances, by deriving effective temperatures from 3D
non-LTE H$\beta$ profiles, surface gravities from Gaia parallaxes, iron
abundances from 3D LTE Feii equivalent widths, and carbon and oxygen abundances
from 3D non-LTE Ci and Oi equivalent widths. We find that [C/Fe] stays flat
with [Fe/H], whereas [O/Fe] increases linearly up to $0.75$ dex with decreasing
[Fe/H] down to $-3.0$ dex. As such [C/O] monotonically decreases towards
decreasing [O/H], in contrast to previous findings, mainly by virtue of less
severe non-LTE effects for Oi at low [Fe/H] with our improved calculations.
|
[{'version': 'v1', 'created': 'Fri, 11 Jan 2019 14:28:35 GMT'}
{'version': 'v2', 'created': 'Fri, 1 Feb 2019 16:40:50 GMT'}]
|
2019-02-04
|
[array(['Amarsi', 'A. M.', ''], dtype=object)
array(['Nissen', 'P. E.', ''], dtype=object)
array(['Asplund', 'M.', ''], dtype=object)
array(['Lind', 'K.', ''], dtype=object)
array(['Barklem', 'P. S.', ''], dtype=object)]
|
6,636 |
physics/0610037
|
Nicolas Sandeau
|
D. Gachet (IF), N. Sandeau (IF), H. Rigneault (IF)
|
Influence of the Raman depolarisation ratio on far-field radiation
patterns in coherent anti-Stokes Raman scattering (CARS) microscopy
| null |
Journal of the European Optical Society - Rapid Publications 1
(2006) 06013
|
10.2971/jeos.2006.06013
| null |
physics.optics physics.bio-ph
| null |
We propose a full-vectorial numerical study of far field radiation patterns
in coherent anti-Stokes Raman scattering (CARS) microscopy. We emphasis the
particular role of the Raman depolarisation ratio of the observed medium and
show how it modifies the radiation pattern of thin objects.
|
[{'version': 'v1', 'created': 'Fri, 6 Oct 2006 12:13:40 GMT'}]
|
2009-11-13
|
[array(['Gachet', 'D.', '', 'IF'], dtype=object)
array(['Sandeau', 'N.', '', 'IF'], dtype=object)
array(['Rigneault', 'H.', '', 'IF'], dtype=object)]
|
6,637 |
1302.0055
|
Vladimir Druzhinin
|
The BABAR Collaboration
|
Study of e+e- --> p anti-p via initial-state radiation at BABAR
|
23 pages, 20 postscript figures, submitted to Phys. Rev. D
| null |
10.1103/PhysRevD.87.092005
|
BABAR-PUB-12/030, SLAC-PUB-15324
|
hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The process e+e- --> p anti-p gamma is studied using 469 fb-1 of integrated
luminosity collected with the BABAR detector at the PEP-II collider, at an e+e-
center-of-mass energy of 10.6 GeV. From the analysis of the p anti-p invariant
mass spectrum, the energy dependence of the cross section for e+e- --> p anti-p
is measured from threshold to 4.5 GeV. The energy dependence of the ratio of
electric and magnetic form factors, |G_E/G_M|, and the asymmetry in the proton
angular distribution are measured for p anti-p masses below 3 GeV. We also
measure the branching fractions for the decays J/psi --> p anti-p and psi(2S)
--> p anti p.
|
[{'version': 'v1', 'created': 'Fri, 1 Feb 2013 01:58:01 GMT'}]
|
2013-05-15
|
[array(['The BABAR Collaboration', '', ''], dtype=object)]
|
6,638 |
2211.15823
|
Akanksha Saran
|
Jessica Maghakian, Paul Mineiro, Kishan Panaganti, Mark Rucker,
Akanksha Saran, Cheng Tan
|
Personalized Reward Learning with Interaction-Grounded Learning (IGL)
|
ICLR 2023
| null | null | null |
cs.LG cs.AI cs.IR
|
http://creativecommons.org/licenses/by/4.0/
|
In an era of countless content offerings, recommender systems alleviate
information overload by providing users with personalized content suggestions.
Due to the scarcity of explicit user feedback, modern recommender systems
typically optimize for the same fixed combination of implicit feedback signals
across all users. However, this approach disregards a growing body of work
highlighting that (i) implicit signals can be used by users in diverse ways,
signaling anything from satisfaction to active dislike, and (ii) different
users communicate preferences in different ways. We propose applying the recent
Interaction Grounded Learning (IGL) paradigm to address the challenge of
learning representations of diverse user communication modalities. Rather than
requiring a fixed, human-designed reward function, IGL is able to learn
personalized reward functions for different users and then optimize directly
for the latent user satisfaction. We demonstrate the success of IGL with
experiments using simulations as well as with real-world production traces.
|
[{'version': 'v1', 'created': 'Mon, 28 Nov 2022 23:18:10 GMT'}
{'version': 'v2', 'created': 'Fri, 3 Mar 2023 22:03:36 GMT'}]
|
2023-03-07
|
[array(['Maghakian', 'Jessica', ''], dtype=object)
array(['Mineiro', 'Paul', ''], dtype=object)
array(['Panaganti', 'Kishan', ''], dtype=object)
array(['Rucker', 'Mark', ''], dtype=object)
array(['Saran', 'Akanksha', ''], dtype=object)
array(['Tan', 'Cheng', ''], dtype=object)]
|
6,639 |
1604.06577
|
Fereshteh Asgari Fereshteh ASGARI
|
Fereshteh Asgari and Alexis Sultan and Haoyi Xiong and Vincent
Gauthier and Mounim El-Yacoubi
|
CT-Mapper: Mapping Sparse Multimodal Cellular Trajectories using a
Multilayer Transportation Network
|
Under revision in Computer Communication Journal
| null | null | null |
cs.SI cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Mobile phone data have recently become an attractive source of information
about mobility behavior. Since cell phone data can be captured in a passive way
for a large user population, they can be harnessed to collect well-sampled
mobility information. In this paper, we propose CT-Mapper, an unsupervised
algorithm that enables the mapping of mobile phone traces over a multimodal
transport network. One of the main strengths of CT-Mapper is its capability to
map noisy sparse cellular multimodal trajectories over a multilayer
transportation network where the layers have different physical properties and
not only to map trajectories associated with a single layer. Such a network is
modeled by a large multilayer graph in which the nodes correspond to
metro/train stations or road intersections and edges correspond to connections
between them. The mapping problem is modeled by an unsupervised HMM where the
observations correspond to sparse user mobile trajectories and the hidden
states to the multilayer graph nodes. The HMM is unsupervised as the transition
and emission probabilities are inferred using respectively the physical
transportation properties and the information on the spatial coverage of
antenna base stations. To evaluate CT-Mapper we collected cellular traces with
their corresponding GPS trajectories for a group of volunteer users in Paris
and vicinity (France). We show that CT-Mapper is able to accurately retrieve
the real cell phone user paths despite the sparsity of the observed trace
trajectories. Furthermore our transition probability model is up to 20% more
accurate than other naive models.
|
[{'version': 'v1', 'created': 'Fri, 22 Apr 2016 08:59:43 GMT'}]
|
2016-04-25
|
[array(['Asgari', 'Fereshteh', ''], dtype=object)
array(['Sultan', 'Alexis', ''], dtype=object)
array(['Xiong', 'Haoyi', ''], dtype=object)
array(['Gauthier', 'Vincent', ''], dtype=object)
array(['El-Yacoubi', 'Mounim', ''], dtype=object)]
|
6,640 |
0902.1929
|
Rolando Magnanini
|
Rolando Magnanini, Shigeru Sakaguchi
|
Nonlinear diffusion with a bounded stationary level surface
|
26 pages
| null |
10.1016/j.anihpc.2009.12.001
| null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider nonlinear diffusion of some substance in a container (not
necessarily bounded) with bounded boundary of class C^2. Suppose that,
initially, the container is empty and, at all times, the substance at its
boundary is kept at density 1. We show that, if the container contains a proper
C^2-subdomain on whose boundary the substance has constant density at each
given time, then the boundary of the container must be a sphere. We also
consider nonlinear diffusion in the whole R^N of some substance whose density
is initially a characteristic function of the complement of a domain with
bounded C^2 boundary, and obtain similar results. These results are also
extended to the heat flow in the sphere S^N and the hyperbolic space H^N.
|
[{'version': 'v1', 'created': 'Wed, 11 Feb 2009 16:24:35 GMT'}]
|
2015-05-13
|
[array(['Magnanini', 'Rolando', ''], dtype=object)
array(['Sakaguchi', 'Shigeru', ''], dtype=object)]
|
6,641 |
2204.10344
|
Kovila P.L. Coopamootoo
|
Magdalene Ng, Kovila P.L. Coopamootoo, Tasos Spiliotopoulos, Dave
Horsfall, Mhairi Aitken, Ehsan Toreini, Karen Elliott, Aad van Moorsel
|
In Private, Secure, Conversational FinBots We Trust
|
Proceedings of the CHI 2021 Workshop on Let's Talk About CUIs:
Putting Conversational User Interface Design into Practice, May 8, 2021 in
Yokohama, Japan
| null | null | null |
cs.CR cs.HC
|
http://creativecommons.org/licenses/by/4.0/
|
In the past decade, the financial industry has experienced a technology
revolution. While we witness a rapid introduction of conversational bots for
financial services, there is a lack of understanding of conversational user
interfaces (CUI) features in this domain. The finance industry also deals with
highly sensitive information and monetary transactions, presenting a challenge
for developers and financial providers. Through a study on how to design
text-based conversational financial interfaces with N=410 participants, we
outline user requirements of trustworthy CUI design for financial bots. We
posit that, in the context of Finance, bot privacy and security assurances
outweigh conversational capability and postulate implications of these
findings. This work acts as a resource on how to design trustworthy FinBots and
demonstrates how automated financial advisors can be transformed into trusted
everyday devices, capable of supporting users' daily financial activities.
|
[{'version': 'v1', 'created': 'Thu, 21 Apr 2022 18:02:43 GMT'}]
|
2022-04-25
|
[array(['Ng', 'Magdalene', ''], dtype=object)
array(['Coopamootoo', 'Kovila P. L.', ''], dtype=object)
array(['Spiliotopoulos', 'Tasos', ''], dtype=object)
array(['Horsfall', 'Dave', ''], dtype=object)
array(['Aitken', 'Mhairi', ''], dtype=object)
array(['Toreini', 'Ehsan', ''], dtype=object)
array(['Elliott', 'Karen', ''], dtype=object)
array(['van Moorsel', 'Aad', ''], dtype=object)]
|
6,642 |
1703.08799
|
Xing-Dao Guo
|
Xing-Dao Guo, Xi-Qing Hao, Hong-Wei Ke, Ming-Gang Zhao, Xue-Qian Li
|
Looking for New Physics via Semi-leptonic and Leptonic rare decays of
$D$ and $D_s$
|
20 pages, 6 figures
| null |
10.1088/1674-1137/41/9/093107
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It is well recognized that looking for new physics at lower energy colliders
is a tendency which is complementary to high energy machines such as LHC. Based
on large database of BESIII, we may have a unique opportunity to do a good job.
In this paper we calculate the branching ratios of semi-leptonic processes
$D^+_s \to K^+ e^-e^+$, $D^+_s \to K^+ e^-\mu^+$ and leptonic processes $D^0
\to e^-e^+$, $D^0 \to e^-\mu^+$ in the frames of $U(1)'$ model, 2HDM and
unparticle separately. It is found that both the $U(1)'$ and 2HDM may influence
the semi-leptonic decay rates, but only the $U(1)'$ offers substantial
contributions to the pure leptonic decays and the resultant branching ratio of
$D^0 \to e^-\mu^+$ can be as large as $10^{-7}\sim10^{-8}$ which might be
observed at the future super $\tau$-charm factory.
|
[{'version': 'v1', 'created': 'Sun, 26 Mar 2017 09:59:19 GMT'}]
|
2017-10-04
|
[array(['Guo', 'Xing-Dao', ''], dtype=object)
array(['Hao', 'Xi-Qing', ''], dtype=object)
array(['Ke', 'Hong-Wei', ''], dtype=object)
array(['Zhao', 'Ming-Gang', ''], dtype=object)
array(['Li', 'Xue-Qian', ''], dtype=object)]
|
6,643 |
2009.02867
|
Sai Tej Paruchuri
|
Sai Tej Paruchuri, Jia Guo and Andrew Kurdila
|
Kernel Center Adaptation in the Reproducing Kernel Hilbert Space
Embedding Method
|
15 pages, 11 figures
| null | null | null |
eess.SY cs.SY math.OC
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The performance of adaptive estimators that employ embedding in reproducing
kernel Hilbert spaces (RKHS) depends on the choice of the location of basis
kernel centers. Parameter convergence and error approximation rates depend on
where and how the kernel centers are distributed in the state-space. In this
paper, we develop the theory that relates parameter convergence and
approximation rates to the position of kernel centers. We develop criteria for
choosing kernel centers in a specific class of systems - ones in which the
state trajectory regularly visits the neighborhood of the positive limit set.
Two algorithms, based on centroidal Voronoi tessellations and Kohonen
self-organizing maps, are derived to choose kernel centers in the RKHS
embedding method. Finally, we implement these methods on two practical examples
and test their effectiveness.
|
[{'version': 'v1', 'created': 'Mon, 7 Sep 2020 03:11:23 GMT'}]
|
2020-09-08
|
[array(['Paruchuri', 'Sai Tej', ''], dtype=object)
array(['Guo', 'Jia', ''], dtype=object)
array(['Kurdila', 'Andrew', ''], dtype=object)]
|
6,644 |
1605.01309
|
Andreas Selmar Hauptmann
|
Andreas Hauptmann, Matteo Santacesaria, and Samuli Siltanen
|
Direct inversion from partial-boundary data in electrical impedance
tomography
| null |
Inverse Problems, Volume 33, Number 2, 025009 (2017)
|
10.1088/1361-6420/33/2/025009
| null |
math.NA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In Electrical Impedance Tomography (EIT) one wants to image the conductivity
distribution of a body from current and voltage measurements carried out on its
boundary. In this paper we consider the underlying mathematical model, the
inverse conductivity problem, in two dimensions and under the realistic
assumption that only a part of the boundary is accessible to measurements. In
this framework our data are modeled as a partial Neumann-to-Dirichlet map (ND
map). We compare this data to the full-boundary ND map and prove that the error
depends linearly on the size of the missing part of the boundary. The same
linear dependence is further proved for the difference of the reconstructed
conductivities -- from partial and full boundary data. The reconstruction is
based on a truncated and linearized D-bar method. Auxiliary results include an
extrapolation method to obtain the full-boundary data from the measured one, an
approximation of the complex geometrical optics solutions computed directly
from the ND map as well as an approximate scattering transform for
reconstructing the conductivity. Numerical verification of the convergence
results and reconstructions are presented for simulated test cases.
|
[{'version': 'v1', 'created': 'Wed, 4 May 2016 15:15:24 GMT'}
{'version': 'v2', 'created': 'Fri, 7 Apr 2017 10:08:50 GMT'}]
|
2017-04-10
|
[array(['Hauptmann', 'Andreas', ''], dtype=object)
array(['Santacesaria', 'Matteo', ''], dtype=object)
array(['Siltanen', 'Samuli', ''], dtype=object)]
|
6,645 |
astro-ph/0106316
|
Axel De La Macorra
|
A. de la Macorra and C. Stephan-Otto
|
Natural Quintessence with Gauge Coupling Unification
|
minor changes(discussion on field normalization included), reference
added, accepted in Phy.Rev.Lett., 5 pages,LateX,2 Figures
|
Phys.Rev.Lett. 87 (2001) 271301
|
10.1103/PhysRevLett.87.271301
|
IFUNAM-FT-2001-01
|
astro-ph hep-ph hep-th
| null |
We show that a positive accelerating universe can be obtained simply by the
dynamics of a non-abelian gauge group. It is the condensates of the chiral
fields that obtain a negative power potential, below the condensation scale,
and allow for a quintessence interpretation of these fields. The only free
parameters in this model are $N_c$ and $N_f$ and the number of dynamically
gauge singlet bilinear fields $\phi$ generated below the condensation scale. We
show that it is possible to have unification of all coupling constants,
including the standard and non standard model couplings, while having an
acceptable phenomenology of $\phi$ as the cosmological constant. This is done
without any fine tuning of the initial conditions. The problem of coincidence
(why the universe has only recently started an accelerating period) is not
solved but it is put at the same level as what the particle content of the
standard model is.
|
[{'version': 'v1', 'created': 'Tue, 19 Jun 2001 02:03:26 GMT'}
{'version': 'v2', 'created': 'Fri, 16 Nov 2001 22:53:46 GMT'}]
|
2009-11-06
|
[array(['de la Macorra', 'A.', ''], dtype=object)
array(['Stephan-Otto', 'C.', ''], dtype=object)]
|
6,646 |
nucl-th/0210017
|
Desplanques
|
G. Le Gorrec, B. Desplanques
|
Estimate of crossed-boson-exchange contributions to the binding energy
of two-body systems
|
11 pages, 7 figures, file.tar
| null | null |
ISN-02-074
|
nucl-th
| null |
Binding energies calculated from using the Bethe-Salpeter equation in the
simplest ladder approximation significantly differ from those obtained in the
non-relativistic standard instantaneous approximation. While they should a
priori be better, they turn out to be further away from an exact calculation in
the case of scalar neutral particles or from experiment in the case of the
Coulomb interaction. Part of the discrepancy is due to the omission in the
interaction kernel of contributions corresponding to crossed-boson-exchange
diagrams. The role of these contributions is examined numerically, using a
simple approximation. The sensitivity to both the coupling constant and the
mass of the exchanged boson is considered.
|
[{'version': 'v1', 'created': 'Mon, 7 Oct 2002 11:54:28 GMT'}]
|
2007-05-23
|
[array(['Gorrec', 'G. Le', ''], dtype=object)
array(['Desplanques', 'B.', ''], dtype=object)]
|
6,647 |
math/0511275
|
Martin R. Bridson
|
Martin R Bridson, Michael Tweedale, Henry Wilton
|
Limit groups, positive-genus towers and measure equivalence
|
10 pages; no figures. Minor changes; now to appear in Ergod. Th. &
Dynam. Sys
| null | null | null |
math.GR math.DS
| null |
By definition, an $\omega$-residually free tower is positive-genus if all
surfaces used in its construction are of positive genus. We prove that every
limit group is virtually a subgroup of a positive-genus $\omega$-residually
free tower. By combining this with results of Gaboriau, we prove that
elementarily free groups are measure equivalent to free groups.
|
[{'version': 'v1', 'created': 'Thu, 10 Nov 2005 17:00:14 GMT'}
{'version': 'v2', 'created': 'Tue, 7 Nov 2006 21:08:12 GMT'}]
|
2007-05-23
|
[array(['Bridson', 'Martin R', ''], dtype=object)
array(['Tweedale', 'Michael', ''], dtype=object)
array(['Wilton', 'Henry', ''], dtype=object)]
|
6,648 |
1811.12666
|
Ryota Natsume
|
Ryota Natsume, Tatsuya Yatagawa, Shigeo Morishima
|
FSNet: An Identity-Aware Generative Model for Image-based Face Swapping
|
20pages, Asian Conference of Computer Vision 2018
| null |
10.1007/978-3-030-20876-9_8
| null |
cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
This paper presents FSNet, a deep generative model for image-based face
swapping. Traditionally, face-swapping methods are based on three-dimensional
morphable models (3DMMs), and facial textures are replaced between the
estimated three-dimensional (3D) geometries in two images of different
individuals. However, the estimation of 3D geometries along with different
lighting conditions using 3DMMs is still a difficult task. We herein represent
the face region with a latent variable that is assigned with the proposed deep
neural network (DNN) instead of facial textures. The proposed DNN synthesizes a
face-swapped image using the latent variable of the face region and another
image of the non-face region. The proposed method is not required to fit to the
3DMM; additionally, it performs face swapping only by feeding two face images
to the proposed network. Consequently, our DNN-based face swapping performs
better than previous approaches for challenging inputs with different face
orientations and lighting conditions. Through several experiments, we
demonstrated that the proposed method performs face swapping in a more stable
manner than the state-of-the-art method, and that its results are compatible
with the method thereof.
|
[{'version': 'v1', 'created': 'Fri, 30 Nov 2018 08:16:57 GMT'}]
|
2022-07-04
|
[array(['Natsume', 'Ryota', ''], dtype=object)
array(['Yatagawa', 'Tatsuya', ''], dtype=object)
array(['Morishima', 'Shigeo', ''], dtype=object)]
|
6,649 |
1102.1564
|
Alexander Prokofiev
|
G. D. Alkhazov, A. V. Kravtsov, A. N. Prokofiev, I. B.Smirnov
|
Mechanism of Pion Production in $alpha$p Scattering at 1 GeV/nucleon
|
16 pages, 10 figures. Submitted to Proceedings of the XX
International Baldin Seminar on High - Energy Physics Problems, Dubna,
October 4 - 9, 2010
| null |
10.1134/S1063778812090025
|
St.Petersburg Nuclear Physics Institute preprint PNPI - 2009, 2791
(2009)
|
nucl-ex hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The one-pion and two-pion production in the p(alpha, alpha prime)X reaction
at an energy of E{alpha} = 4.2 GeV has been studied by simultaneous
registration of the scattered alpha particles and the secondary pion or proton.
The obtained results demonstrate that the inelastic alpha-particle scattering
on the proton at the energy of the experiment proceeds either through
excitation and decay of Delta resonance in the projectile or through excitation
in the target proton of the Roper resonance, which decays mainly on a nucleon
and a pion or a nucleon and a sigma meson - system of two pions in the isospin
I = 0, S-wave.
|
[{'version': 'v1', 'created': 'Tue, 8 Feb 2011 10:44:57 GMT'}]
|
2015-05-27
|
[array(['Alkhazov', 'G. D.', ''], dtype=object)
array(['Kravtsov', 'A. V.', ''], dtype=object)
array(['Prokofiev', 'A. N.', ''], dtype=object)
array(['Smirnov', 'I. B.', ''], dtype=object)]
|
6,650 |
1603.06762
|
Lysianne Hari
|
Lysianne Hari and Nicola Visciglia
|
Small data scattering for energy-subcritical and critical Nonlinear
Klein Gordon equations on product spaces
| null | null | null | null |
math.AP math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study small data scattering of solutions to Nonlinear Klein-Gordon
equations with suitable pure power nonlinearities, posed on $\mathbb{R}^d\times
\mathcal{M}^k$ with $k\leq2$ and $d\geq1$ and $\mathcal{M}^k$ a compact
Riemannian manifold. As a special case we cover the $H^1-$critical NLKG on
$\mathbb{R} \times M^2$.
|
[{'version': 'v1', 'created': 'Tue, 22 Mar 2016 12:38:09 GMT'}]
|
2016-03-23
|
[array(['Hari', 'Lysianne', ''], dtype=object)
array(['Visciglia', 'Nicola', ''], dtype=object)]
|
6,651 |
1804.10253
|
Elad Plaut
|
Elad Plaut
|
From Principal Subspaces to Principal Components with Linear
Autoencoders
| null | null | null | null |
stat.ML cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The autoencoder is an effective unsupervised learning model which is widely
used in deep learning. It is well known that an autoencoder with a single
fully-connected hidden layer, a linear activation function and a squared error
cost function trains weights that span the same subspace as the one spanned by
the principal component loading vectors, but that they are not identical to the
loading vectors. In this paper, we show how to recover the loading vectors from
the autoencoder weights.
|
[{'version': 'v1', 'created': 'Thu, 26 Apr 2018 19:28:02 GMT'}
{'version': 'v2', 'created': 'Sat, 25 Aug 2018 20:23:27 GMT'}
{'version': 'v3', 'created': 'Fri, 28 Dec 2018 19:02:12 GMT'}]
|
2019-01-01
|
[array(['Plaut', 'Elad', ''], dtype=object)]
|
6,652 |
2109.05742
|
Yijun Yang
|
Yijun Yang, Shujun Wang, Lei Zhu, Pheng-Ann Heng, Lequan Yu
|
Domain Generalization for Medical Image Segmentation via Hierarchical
Consistency Regularization
|
this paper is currently not published
| null | null | null |
cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
Modern deep neural networks struggle to transfer knowledge and generalize
across diverse domains when deployed to real-world applications. Currently,
domain generalization (DG) is introduced to learn a universal representation
from multiple domains to improve the network generalization ability on unseen
domains. However, previous DG methods only focus on the data-level consistency
scheme without considering the synergistic regularization among different
consistency schemes. In this paper, we present a novel Hierarchical Consistency
framework for Domain Generalization (HCDG) by integrating Extrinsic Consistency
and Intrinsic Consistency synergistically. Particularly, for the Extrinsic
Consistency, we leverage the knowledge across multiple source domains to
enforce data-level consistency. To better enhance such consistency, we design a
novel Amplitude Gaussian-mixing strategy into Fourier-based data augmentation
called DomainUp. For the Intrinsic Consistency, we perform task-level
consistency for the same instance under the dual-task scenario. We evaluate the
proposed HCDG framework on two medical image segmentation tasks, i.e., optic
cup/disc segmentation on fundus images and prostate MRI segmentation. Extensive
experimental results manifest the effectiveness and versatility of our HCDG
framework.
|
[{'version': 'v1', 'created': 'Mon, 13 Sep 2021 07:07:23 GMT'}
{'version': 'v2', 'created': 'Thu, 9 Jun 2022 08:40:31 GMT'}
{'version': 'v3', 'created': 'Tue, 28 Jun 2022 03:11:58 GMT'}]
|
2022-06-29
|
[array(['Yang', 'Yijun', ''], dtype=object)
array(['Wang', 'Shujun', ''], dtype=object)
array(['Zhu', 'Lei', ''], dtype=object)
array(['Heng', 'Pheng-Ann', ''], dtype=object)
array(['Yu', 'Lequan', ''], dtype=object)]
|
6,653 |
cond-mat/9702056
|
Jean-Marc Robin
|
T. Domanski, J. Ranninger and J. M. Robin (CRTBT Grenoble France)
|
The Atomic Limit of the Boson-Fermion Model
|
revtex, 9 pages and 6 eps figures. Submitted to Europhysics Letters
|
Solid State Communication, 105 (1998) 473-477
|
10.1016/S0038-1098(97)10155-7
| null |
cond-mat.str-el
| null |
The Boson-Fermion model, describing a mixture of hybridized localized Bosons
and itinerant Fermions on a lattice, is known to exhibit spectral properties
for the Fermions which upon lowering the temperature develop into a three pole
structure in the vicinity of the Fermi level. These spectral features go hand
in hand with the opening of a pseudogap in the density of states upon
approaching the critical temperature Tc when superconductivity sets in. In the
present work we study this model, in the atomic limit where the three pole
structure arises naturally from the local bonding, anti-bonding and non-bonding
states between the Bosons and Fermions.
|
[{'version': 'v1', 'created': 'Thu, 6 Feb 1997 09:26:59 GMT'}]
|
2009-10-30
|
[array(['Domanski', 'T.', '', 'CRTBT Grenoble France'], dtype=object)
array(['Ranninger', 'J.', '', 'CRTBT Grenoble France'], dtype=object)
array(['Robin', 'J. M.', '', 'CRTBT Grenoble France'], dtype=object)]
|
6,654 |
1203.6177
|
Hajar Gahremani Gol
|
Hajar Ghahremani Gol, Asadollah Razavi, Farzad Didehva
|
On Distance Function among Finite Set of Points
| null | null | null | null |
cs.DM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In practical purposes for some geometrical problems in computer science we
have as information the coordinates of some finite points in surface instead of
the whole body of a surface. The problem arised here is: "How to define a
distance function in a finite space?" as we will show the appropriate function
for this purpose is not a metric function. Here we try to define this distance
function in order to apply it in further proposes, specially in the field
setting of transportation theory and vehicle routing problem. More precisely in
this paper we consider VRP problem for two dimensional manifolds in R3.
|
[{'version': 'v1', 'created': 'Wed, 28 Mar 2012 06:42:14 GMT'}]
|
2012-03-29
|
[array(['Gol', 'Hajar Ghahremani', ''], dtype=object)
array(['Razavi', 'Asadollah', ''], dtype=object)
array(['Didehva', 'Farzad', ''], dtype=object)]
|
6,655 |
math/0311532
|
Philippe Chassaing
|
Philippe Chassaing, Bergfinnur Durhuus
|
Local limit of labeled trees and expected volume growth in a random
quadrangulation
|
Published at http://dx.doi.org/10.1214/009117905000000774 in the
Annals of Probability (http://www.imstat.org/aop/) by the Institute of
Mathematical Statistics (http://www.imstat.org)
|
Annals of Probability 2006, Vol. 34, No. 3, 879-917
|
10.1214/009117905000000774
|
IMS-AOP-AOP0118
|
math.PR math.CO
| null |
Exploiting a bijective correspondence between planar quadrangulations and
well-labeled trees, we define an ensemble of infinite surfaces as a limit of
uniformly distributed ensembles of quadrangulations of fixed finite volume. The
limit random surface can be described in terms of a birth and death process and
a sequence of multitype Galton--Watson trees. As a consequence, we find that
the expected volume of the ball of radius $r$ around a marked point in the
limit random surface is $\Theta(r^4)$.
|
[{'version': 'v1', 'created': 'Fri, 28 Nov 2003 15:08:19 GMT'}
{'version': 'v2', 'created': 'Wed, 1 Jun 2005 15:24:23 GMT'}
{'version': 'v3', 'created': 'Thu, 29 Jun 2006 12:13:04 GMT'}]
|
2007-05-23
|
[array(['Chassaing', 'Philippe', ''], dtype=object)
array(['Durhuus', 'Bergfinnur', ''], dtype=object)]
|
6,656 |
2008.03657
|
Steven Tingay
|
Wynand Joubert and Steven Tingay
|
Simulations of orbital debris clouds due to breakup events and their
characterisation using the Murchison Widefield Array radio telescope
|
Submitted to Experimental Astronomy. 16 pages, 6 figures
| null |
10.1007/s10686-020-09684-7
| null |
astro-ph.EP astro-ph.IM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper we consider the use of wide field of view radar sensors such as
the Murchison Widefield Array (MWA), a low frequency radio telescope designed
for astrophysics and cosmology, for rapid response observations of the debris
clouds produced by collisions between objects in Earth orbit. With an
increasing density of objects in Low Earth Orbit, including legacy assets used
by the astronomy community over decades, the risk of new debris clouds forming
is also increasing. The MWA constitutes a wide field, rapid response passive
radar system and we explore its likely performance in the detection and
characterisation of debris clouds. In general, astronomy facilities such as the
MWA can play a role in protecting the space environment for the future. In
order to undertake this work, we adapt the NASA EVOLVE 4.0 breakup model,
utilising the EVOLVE outputs to produce representative dynamic debris clouds.
We find that the MWA is likely to detect a large fraction (>70%) of modelled
debris cloud fragments for collision masses between 100 kg and 1000 kg for
orbits in the lower part of LEO, if the MWA can achieve close to optimal
detection sensitivity. Useful detection fractions are still achieved for more
conservative assumptions. The detection fraction of fragments decreases as a
function of altitude and inversely with collision mass. Encouragingly, we find
that the wide field nature of the MWA allows the full evolving debris clouds to
be observed in a single observation, with only $\sim2\%$ of the debris
fragments escaping the sensitive portion of the field of view after 100
seconds, for all collision masses and altitudes. These results show that the
MWA is an intrinsically useful facility for the rapid characterisation of
debris clouds, but that work is required to achieve the data processing within
an appropriate timeframe to provide rapid alerts.
|
[{'version': 'v1', 'created': 'Sun, 9 Aug 2020 05:07:06 GMT'}]
|
2020-11-25
|
[array(['Joubert', 'Wynand', ''], dtype=object)
array(['Tingay', 'Steven', ''], dtype=object)]
|
6,657 |
2102.06686
|
Hamide Imal
|
H. Imal, R. Ogul
|
Theoretical Study of Isotope Production in The Peripheral Heavy-ion
Collision 136Xe + Pb at 1 GeV/nucleon
|
12 pages, 2 figures and one table. arXiv admin note: text overlap
with arXiv:0806.3455, arXiv:1912.09277, arXiv:nucl-th/0510081 by other
authors
| null |
10.1016/j.nuclphysa.2021.122261
| null |
nucl-th nucl-ex
|
http://creativecommons.org/publicdomain/zero/1.0/
|
We have studied the fragment yields emitted from the fragmentation of excited
projectile nuclei in peripheral collisions of 136Xe+Pb at 1 GeV/nucleon, and
measured with the high-resolution magnetic spectrometer, the Fragment Separator
(FRS) of GSI. The mass, charge and isotope distributions of nuclear fragments
formed in the reactions were calculated within a statistical ensemble approach
and compared to the experimental data. The ensemble of excited projectilelike
source nuclei were created in the framework of a previous analysis of similar
reactions performed at 600 MeV/nucleon (ALADIN-experiments, GSI). In addition,
the ensemble of the low-excited compound nuclei is involved in the analysis.
The overall agreement between theory and experiment was very satisfactory in
reproducing the experimental data of isotope yields measured in the heavy-ion
collisions. It is confirmed that a broad range of elements can be reproduced
within a universal statistical disintegration of the excited projectile
residues.
|
[{'version': 'v1', 'created': 'Wed, 10 Feb 2021 12:19:33 GMT'}
{'version': 'v2', 'created': 'Thu, 8 Jul 2021 10:54:52 GMT'}]
|
2021-07-14
|
[array(['Imal', 'H.', ''], dtype=object)
array(['Ogul', 'R.', ''], dtype=object)]
|
6,658 |
1012.5729
|
Yu-Huang Chiu
|
Jhao-Ying Wu, Szu-Chao Chen, Oleksiy Roslyak, Godfrey Gumbs, and
Ming-Fa Lin
|
Plasma Excitations in Graphene: Their Spectral Intensity and Temperature
Dependence in Magnetic Field
| null |
ACS NANO 5, 1026 (2011)
| null | null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we calculated the dielectric function, the loss function, the
magnetoplasmon dispersion relation and the temperature-induced transitions for
graphene in a uniform perpendicular magnetic field B. The calculations were
performed using the Peierls tight-binding model to obtain the energy band
structure and the random-phase approximation to determine the collective plasma
excitation spectrum. The single-particle and collective excitations have been
precisely identified based on the resonant peaks in the loss function. The
critical wave vector at which plasmon damping takes place is clearly
established. This critical wave vector depends on the magnetic field strength
as well as the levels between which the transition takes place. The temperature
effects were also investigated. At finite temperature, there are plasma
resonances induced by the Fermi distribution function. Whether such plasmons
exist is mainly determined by the field strength, temperature, and momentum.
The inelastic light scattering spectroscopies could be used to verify the
magnetic field and temperature induced plasmons.
|
[{'version': 'v1', 'created': 'Tue, 28 Dec 2010 09:38:42 GMT'}]
|
2014-04-14
|
[array(['Wu', 'Jhao-Ying', ''], dtype=object)
array(['Chen', 'Szu-Chao', ''], dtype=object)
array(['Roslyak', 'Oleksiy', ''], dtype=object)
array(['Gumbs', 'Godfrey', ''], dtype=object)
array(['Lin', 'Ming-Fa', ''], dtype=object)]
|
6,659 |
hep-th/0701216
|
Iosif Bena
|
Iosif Bena and Nicholas P. Warner
|
Black Holes, Black Rings and their Microstates
|
96 pages, 10 figures, 17 exercises, LaTeX. Review article based on
lectures presented at the Winter School on the Attractor Mechanism (Frascati,
March 20-24, 2006). v2. Improved discussion of smoothness and regularity of
microstate geometries. References added
|
Lect.NotesPhys.755:1-92,2008
|
10.1007/978-3-540-79523-0
|
SPHT-T07/008
|
hep-th
| null |
In this review article we describe some of the recent progress towards the
construction and analysis of three-charge configurations in string theory and
supergravity. We begin by describing the Born-Infeld construction of
three-charge supertubes with two dipole charges, and then discuss the general
method of constructing three-charge solutions in five dimensions. We explain in
detail the use of these methods to construct black rings, black holes, as well
as smooth microstate geometries with black hole and black ring charges, but
with no horizon. We present arguments that many of these microstate geometries
are dual to boundary states that belong to the same sector of the D1-D5-P CFT
as the typical states. We end with an extended discussion of the implications
of this work for the physics of black holes in string theory.
|
[{'version': 'v1', 'created': 'Tue, 23 Jan 2007 14:46:26 GMT'}
{'version': 'v2', 'created': 'Thu, 8 Feb 2007 22:04:28 GMT'}]
|
2008-11-26
|
[array(['Bena', 'Iosif', ''], dtype=object)
array(['Warner', 'Nicholas P.', ''], dtype=object)]
|
6,660 |
1904.09063
|
Hung Viet Chu Mr
|
Hung Viet Chu
|
On a Curious Identity of Ramanujan
|
The author was an undergraduate at Washington and Lee University. The
author wants to thank Prof. Abrams Aaron, Kevin Beanland, and Gregory Dresden
at Washington and Lee University for many helpful conversations. Special
thanks to Prof. Steven Miller at Williams College for valuable comments on
the earlier drafts of this paper
| null | null | null |
math.NT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Ramanujan wrote the following identity \begin{align*} \sqrt{2 \left(1 -
\frac{1}{3^2}\right) \left(1 - \frac{1}{7^2}\right) \left(1 -
\frac{1}{11^2}\right) \left(1 - \frac{1}{19^2}\right)} \ = \
\left(1 + \frac{1}{7}\right) \left(1 + \frac{1}{11}\right) \left(1 +
\frac{1}{19}\right). \end{align*} We find necessary and sufficient conditions
for the integers in the identity and prove that there are only finitely many
such identities, and provide a method to generate many interesting variations.
|
[{'version': 'v1', 'created': 'Fri, 19 Apr 2019 03:24:26 GMT'}
{'version': 'v2', 'created': 'Sun, 5 Jan 2020 20:04:54 GMT'}]
|
2020-01-07
|
[array(['Chu', 'Hung Viet', ''], dtype=object)]
|
6,661 |
hep-th/9402050
|
Jun Nishimura
|
Jun Nishimura, Shinya Tamura and Asato Tsuchiya
|
Scaling Dimensions of Manifestly Generally Covariant Operators in
Two-Dimensional Quantum Gravity
|
20 pages, UT-664, ICRR-Report-306-94-1, UT-Komaba/94-2,
(Interpretation of the results has been changed.)
|
Int.J.Mod.Phys. A10 (1995) 859-874
|
10.1142/S0217751X95000425
| null |
hep-th
| null |
Using (2+$\epsilon$)-dimensional quantum gravity recently formulated by
Kawai, Kitazawa and Ninomiya, we calculate the scaling dimensions of manifestly
generally covariant operators in two-dimensional quantum gravity coupled to
$(p,q)$ minimal conformal matter. Although the spectrum includes all the
scaling dimensions of the scaling operators in the matrix model except the
boundary operators, there are also many others which do not appear in the
matrix model. We argue that the partial agreement of the scaling dimensions
should be considered as accidental and that the operators considered give a new
series of operators in two-dimensional quantum gravity.
|
[{'version': 'v1', 'created': 'Wed, 9 Feb 1994 11:32:44 GMT'}
{'version': 'v2', 'created': 'Tue, 30 Aug 1994 03:44:30 GMT'}]
|
2009-10-28
|
[array(['Nishimura', 'Jun', ''], dtype=object)
array(['Tamura', 'Shinya', ''], dtype=object)
array(['Tsuchiya', 'Asato', ''], dtype=object)]
|
6,662 |
1209.1243
|
Nikolai Filonov
|
N. Filonov
|
On the regularity of solutions to the equation - \Delta u + b \nabla u =
0
|
15 pages
| null | null | null |
math.AP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the equation - \Delta u + b \nabla u = 0. The dependence of the
local regularity of a solution on the properties of the coefficient b is
investigated.
|
[{'version': 'v1', 'created': 'Thu, 6 Sep 2012 09:58:21 GMT'}
{'version': 'v2', 'created': 'Fri, 1 Mar 2013 10:20:52 GMT'}
{'version': 'v3', 'created': 'Mon, 4 Mar 2013 07:26:44 GMT'}]
|
2013-03-05
|
[array(['Filonov', 'N.', ''], dtype=object)]
|
6,663 |
1611.04686
|
Hang Zhang
|
Hang Zhang, Fengyuan Zhu and Shixin Li
|
Robust Matrix Regression
|
8 pages, 4 tables
| null | null | null |
cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Modern technologies are producing datasets with complex intrinsic structures,
and they can be naturally represented as matrices instead of vectors. To
preserve the latent data structures during processing, modern regression
approaches incorporate the low-rank property to the model and achieve
satisfactory performance for certain applications. These approaches all assume
that both predictors and labels for each pair of data within the training set
are accurate. However, in real-world applications, it is common to see the
training data contaminated by noises, which can affect the robustness of these
matrix regression methods. In this paper, we address this issue by introducing
a novel robust matrix regression method. We also derive efficient proximal
algorithms for model training. To evaluate the performance of our methods, we
apply it to real world applications with comparative studies. Our method
achieves the state-of-the-art performance, which shows the effectiveness and
the practical value of our method.
|
[{'version': 'v1', 'created': 'Tue, 15 Nov 2016 03:15:46 GMT'}]
|
2016-11-16
|
[array(['Zhang', 'Hang', ''], dtype=object)
array(['Zhu', 'Fengyuan', ''], dtype=object)
array(['Li', 'Shixin', ''], dtype=object)]
|
6,664 |
2107.06132
|
Antonio Di Pilato
|
Antonio Di Pilato, Nicol\`o Taggio, Alexis Pompili, Michele
Iacobellis, Adriano Di Florio, Davide Passarelli, Sergio Samarelli
|
Deep learning approaches to Earth Observation change detection
| null | null | null | null |
cs.CV cs.AI
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
The interest for change detection in the field of remote sensing has
increased in the last few years. Searching for changes in satellite images has
many useful applications, ranging from land cover and land use analysis to
anomaly detection. In particular, urban change detection provides an efficient
tool to study urban spread and growth through several years of observation. At
the same time, change detection is often a computationally challenging and
time-consuming task, which requires innovative methods to guarantee optimal
results with unquestionable value and within reasonable time. In this paper we
present two different approaches to change detection (semantic segmentation and
classification) that both exploit convolutional neural networks to achieve good
results, which can be further refined and used in a post-processing workflow
for a large variety of applications.
|
[{'version': 'v1', 'created': 'Tue, 13 Jul 2021 14:34:59 GMT'}]
|
2021-07-14
|
[array(['Di Pilato', 'Antonio', ''], dtype=object)
array(['Taggio', 'Nicolò', ''], dtype=object)
array(['Pompili', 'Alexis', ''], dtype=object)
array(['Iacobellis', 'Michele', ''], dtype=object)
array(['Di Florio', 'Adriano', ''], dtype=object)
array(['Passarelli', 'Davide', ''], dtype=object)
array(['Samarelli', 'Sergio', ''], dtype=object)]
|
6,665 |
1404.6641
|
Soumyajyoti Haldar
|
Soumyajyoti Haldar, Bhalchandra S. Pujari, Sumanta Bhandary, Fabrizio
Cossu, Olle Eriksson, Dilip G. Kanhere, Biplab Sanyal
|
Fe clusters (Fe$_n$, n=1-6) chemisorbed on vacancy defects in graphene:
Stability, spin-dipole moment and magnetic anisotropy
| null | null |
10.1103/PhysRevB.89.205411
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, we have studied the chemical and magnetic interactions of
Fe$_n$ ; n=1-6 clusters with vacancy defects (monovacancy to correlated
vacancies with six missing C atoms) in a graphene sheet by ab-initio density
functional calculations combined with Hubbard U corrections for correlated Fe-
d electrons. It is found that the vacancy formation energies are lowered in the
presence of Fe, indicating an easier destruction of the graphene sheet. Due to
strong chemical interactions between Fe clusters and vacancies, a complex
distribution of magnetic moments appear on the distorted Fe clusters which
results in reduced averaged magnetic moments compared to the free clusters. In
addition to that, we have calculated spin-dipole moments and magnetic
anisotropy energies. The calculated spin-dipole moments arising from
anisotropic spin density distributions, vary between positive and negative
values, yielding increased or decreased effective moments. Depending on the
cluster geometry, the easy axis of magnetization of the Fe clusters shows
in-plane or out-of-plane behavior.
|
[{'version': 'v1', 'created': 'Sat, 26 Apr 2014 13:48:29 GMT'}
{'version': 'v2', 'created': 'Tue, 6 May 2014 15:30:15 GMT'}]
|
2014-05-14
|
[array(['Haldar', 'Soumyajyoti', ''], dtype=object)
array(['Pujari', 'Bhalchandra S.', ''], dtype=object)
array(['Bhandary', 'Sumanta', ''], dtype=object)
array(['Cossu', 'Fabrizio', ''], dtype=object)
array(['Eriksson', 'Olle', ''], dtype=object)
array(['Kanhere', 'Dilip G.', ''], dtype=object)
array(['Sanyal', 'Biplab', ''], dtype=object)]
|
6,666 |
1905.01338
|
Avinash Madasu
|
Avinash Madasu and Vijjini Anvesh Rao
|
Effectiveness of Self Normalizing Neural Networks for Text
Classification
|
Accepted Long Paper at 20th International Conference on Computational
Linguistics and Intelligent Text Processing, April 2019, La Rochelle, France
| null | null | null |
cs.CL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Self Normalizing Neural Networks(SNN) proposed on Feed Forward Neural
Networks(FNN) outperform regular FNN architectures in various machine learning
tasks. Particularly in the domain of Computer Vision, the activation function
Scaled Exponential Linear Units (SELU) proposed for SNNs, perform better than
other non linear activations such as ReLU. The goal of SNN is to produce a
normalized output for a normalized input. Established neural network
architectures like feed forward networks and Convolutional Neural Networks(CNN)
lack the intrinsic nature of normalizing outputs. Hence, requiring additional
layers such as Batch Normalization. Despite the success of SNNs, their
characteristic features on other network architectures like CNN haven't been
explored, especially in the domain of Natural Language Processing. In this
paper we aim to show the effectiveness of proposed, Self Normalizing
Convolutional Neural Networks(SCNN) on text classification. We analyze their
performance with the standard CNN architecture used on several text
classification datasets. Our experiments demonstrate that SCNN achieves
comparable results to standard CNN model with significantly fewer parameters.
Furthermore it also outperforms CNN with equal number of parameters.
|
[{'version': 'v1', 'created': 'Fri, 3 May 2019 18:38:39 GMT'}]
|
2019-05-07
|
[array(['Madasu', 'Avinash', ''], dtype=object)
array(['Rao', 'Vijjini Anvesh', ''], dtype=object)]
|
6,667 |
2109.04559
|
Austin Theriault
|
Linsheng Liu, Daniel S. Roche, Austin Theriault, Arkady Yerukhimovich
|
Fighting Fake News in Encrypted Messaging with the Fuzzy Anonymous
Complaint Tally System (FACTS)
|
16 pages, to appear in NDSS 2022
| null | null | null |
cs.CR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recent years have seen a strong uptick in both the prevalence and real-world
consequences of false information spread through online platforms. At the same
time, encrypted messaging systems such as WhatsApp, Signal, and Telegram, are
rapidly gaining popularity as users seek increased privacy in their digital
lives.
The challenge we address is how to combat the viral spread of misinformation
without compromising privacy. Our FACTS system tracks user complaints on
messages obliviously, only revealing the message's contents and originator once
sufficiently many complaints have been lodged.
Our system is private, meaning it does not reveal anything about the senders
or contents of messages which have received few or no complaints; secure,
meaning there is no way for a malicious user to evade the system or gain an
outsized impact over the complaint system; and scalable, as we demonstrate
excellent practical efficiency for up to millions of complaints per day.
Our main technical contribution is a new collaborative counting Bloom filter,
a simple construction with difficult probabilistic analysis, which may have
independent interest as a privacy-preserving randomized count sketch data
structure.
Compared to prior work on message flagging and tracing in end-to-end
encrypted messaging, our novel contribution is the addition of a high threshold
of multiple complaints that are needed before a message is audited or flagged.
We present and carefully analyze the probabilistic performance of our data
structure, provide a precise security definition and proof, and then measure
the accuracy and scalability of our scheme via experimentation.
|
[{'version': 'v1', 'created': 'Thu, 9 Sep 2021 20:51:41 GMT'}]
|
2021-09-13
|
[array(['Liu', 'Linsheng', ''], dtype=object)
array(['Roche', 'Daniel S.', ''], dtype=object)
array(['Theriault', 'Austin', ''], dtype=object)
array(['Yerukhimovich', 'Arkady', ''], dtype=object)]
|
6,668 |
1705.03369
|
Andres M. Belaza
|
Andres M. Belaza, Kevin Hoefman, Jan Ryckebusch, Aaron Bramson, Milan
van den Heuvel and Koen Schoors
|
Statistical Physics of Balance Theory
|
18 pages - 10 figures
| null |
10.1371/journal.pone.0183696
| null |
physics.soc-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Triadic relationships are accepted to play a key role in the dynamics of
social and political networks. Building on insights gleaned from balance theory
in social network studies and from Boltzmann-Gibbs statistical physics, we
propose a model to quantitatively capture the dynamics of the four types of
triadic relationships in a network. Central to our model are the triads'
incidence rates and the idea that those can be modeled by assigning a specific
triadic energy to each type of triadic relation. We emphasize the role of the
degeneracy of the different triads and how it impacts the degree of frustration
in the political network. In order to account for a persistent form of disorder
in the formation of the triadic relationships, we introduce the systemic
variable temperature. In order to learn about the dynamics and motives, we
propose a generic Hamiltonian with three terms to model the triadic energies.
One term is connected with a three-body interaction that captures balance
theory. The other terms take into account the impact of heterogeneity and of
negative edges in the triads. The validity of our model is tested on four
datasets including the time series of triadic relationships for the standings
between two classes of alliances in a massively multiplayer online game (MMOG).
We also analyze real-world data for the relationships between the "agents"
involved in the Syrian civil war, and in the relations between countries during
the Cold War era. We find emerging properties in the triadic relationships in a
political network, for example reflecting itself in a persistent hierarchy
between the four triadic energies, and in the consistency of the extracted
parameters from comparing the model Hamiltonian to the data.
|
[{'version': 'v1', 'created': 'Tue, 9 May 2017 14:57:04 GMT'}
{'version': 'v2', 'created': 'Wed, 23 Aug 2017 12:33:22 GMT'}
{'version': 'v3', 'created': 'Thu, 24 Aug 2017 15:39:15 GMT'}]
|
2017-08-30
|
[array(['Belaza', 'Andres M.', ''], dtype=object)
array(['Hoefman', 'Kevin', ''], dtype=object)
array(['Ryckebusch', 'Jan', ''], dtype=object)
array(['Bramson', 'Aaron', ''], dtype=object)
array(['Heuvel', 'Milan van den', ''], dtype=object)
array(['Schoors', 'Koen', ''], dtype=object)]
|
6,669 |
1203.3838
|
Chittineni Suneetha
|
Suneetha Chittineni and Raveendra Babu Bhogapathi
|
A Study on the Behavior of a Neural Network for Grouping the Data
|
7 pages,2 figures,9 tables
|
IJCSI International Journal of Computer Science Issues, Vol. 9,
Issue 1, No 1, January 2012, pp:228-234
| null | null |
cs.NE cs.RO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
One of the frequently stated advantages of neural networks is that they can
work effectively with non-normally distributed data. But optimal results are
possible with normalized data.In this paper, how normality of the input affects
the behaviour of a K-means fast learning artificial neural network(KFLANN) for
grouping the data is presented. Basically, the grouping of high dimensional
input data is controlled by additional neural network input parameters namely
vigilance and tolerance.Neural networks learn faster and give better
performance if the input variables are pre-processed before being fed to the
input units of the neural network. A common way of dealing with data that is
not normally distributed is to perform some form of mathematical transformation
on the data that shifts it towards a normal distribution.In a neural network,
data preprocessing transforms the data into a format that will be more easily
and effectively processed for the purpose of the user. Among various methods,
Normalization is one which organizes data for more efficient access.
Experimental results on several artificial and synthetic data sets indicate
that the groups formed in the data vary with non-normally distributed data and
normalized data and also depends on the normalization method used.
|
[{'version': 'v1', 'created': 'Sat, 17 Mar 2012 05:06:21 GMT'}]
|
2012-03-20
|
[array(['Chittineni', 'Suneetha', ''], dtype=object)
array(['Bhogapathi', 'Raveendra Babu', ''], dtype=object)]
|
6,670 |
1211.1735
|
Yu-Wen Lee
|
Yu-Wen Lee, Yung-Chung Chen, and Min-Fong Yang
|
Stability of three-sublattice order in S=1 bilinear-biquadratic
Heisenberg Model on anisotropic triangular lattices
|
8 pages, 6 figures
|
J. Phys. Soc. Jpn., 82, 034705 (2013)
|
10.7566/JPSJ.82.034705
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The S=1 bilinear-biquadratic Heisenberg model on anisotropic triangular
lattices is investigated by several complementary methods. Our focus is on the
stability of the three-sublattice spin nematic state against spatial
anisotropy. We find that, deviated from the case of isotropic triangular
lattice, quantum fluctuations enhance and the three-sublattice spin nematic
order is reduced. In the limit of weakly coupling chains, by mapping the
systems to an effective one-dimensional model, we show that the
three-sublattice spin nematic order develops at infinitesimal interchain
coupling. Our results provide a complete picture for smooth crossover from the
triangular-lattice case to both the square-lattice and the one-dimensional
limits.
|
[{'version': 'v1', 'created': 'Thu, 8 Nov 2012 00:39:18 GMT'}]
|
2013-02-06
|
[array(['Lee', 'Yu-Wen', ''], dtype=object)
array(['Chen', 'Yung-Chung', ''], dtype=object)
array(['Yang', 'Min-Fong', ''], dtype=object)]
|
6,671 |
2106.15900
|
Felix Bosco
|
Felix Bosco, Joseph F. Hennawi, Jonathan Stern, J\"org-Uwe Pott
|
Spatially Resolving the Kinematics of the $\lesssim 100\,\mu$as Quasar
Broad-line Region Using Spectroastrometry II. The First Tentative Detection
in a Luminous Quasar at $z=2.3$
|
26 pages, 3 pages appendix, 18 figures, accepted by ApJ
| null |
10.3847/1538-4357/ac106a
| null |
astro-ph.GA
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
Direct measurements of the masses of supermassive black holes (SMBHs) are key
to understanding their growth and constrain their symbiotic relationship to
their host galaxies. However, current methods used to directly measure black
hole masses in active quasars become challenging or impossible beyond
$z\gtrsim0.2$. Spectroastrometry (SA) measures the spatial centroid of an
object's spectrum as a function of wavelength, delivering angular resolution
far better than the point-spread function (PSF) for high signal-to-noise ratio
observations. We observed the luminous quasar SDSS J212329.47--005052.9 at
$z=2.279$ with the aim of resolving its $\sim100\mu\mathrm{as}$ H$\alpha$ broad
emission-line region (BLR), and present the first SA constraints on the size
and kinematic structure of the BLR. Using a novel pipeline to extract the SA
signal and reliable uncertainties, we achieved a centroiding precision of
$\simeq100\mu\mathrm{as}$, or $>2000\times$ smaller than the $K$-band
AO-corrected PSF, yielding a tentative $3.2\sigma$ detection of an SA signal
from the BLR. Modeling the BLR emission as arising from an inclined rotating
disk with a mixture of coherent and random motions we constrain
$r_\mathrm{BLR}=454^{+565}_{-162}\,\mu\mathrm{as}$
($3.71^{+4.65}_{-1.28}\,\mathrm{pc}$), providing a $95\%$ confidence upper
limit on the black hole mass $M_\mathrm{BH}\,\sin^2\,i \leq1.8
\times10^9\,\mathrm{M}_\odot$. Our results agree with the $r_\mathrm{BLR}-L$
relation measured for lower-$z$ quasars, but expands its dynamic range by an
order of magnitude in luminosity. We did not detect the potentially stronger SA
signal from the narrow-line region, but discuss in detail why it may be absent.
Already with existing instrumentation, SA can deliver $\sim6\times$ smaller
uncertainties ($\sim15\,\mu\mathrm{as}$) than achieved here, enabling
$\sim10\%$ measurements of SMBH masses in high-$z$ quasars.
|
[{'version': 'v1', 'created': 'Wed, 30 Jun 2021 08:42:42 GMT'}
{'version': 'v2', 'created': 'Tue, 14 Sep 2021 15:43:11 GMT'}]
|
2021-09-29
|
[array(['Bosco', 'Felix', ''], dtype=object)
array(['Hennawi', 'Joseph F.', ''], dtype=object)
array(['Stern', 'Jonathan', ''], dtype=object)
array(['Pott', 'Jörg-Uwe', ''], dtype=object)]
|
6,672 |
1806.00855
|
Arielle Little
|
Liang Wu, Arielle Little, Erik E. Aldape, Dylan Rees, Eric Thewalt,
Paula Lampen-Kelley, Arnab Banerjee, Craig A. Bridges, Jiaqiang Yan, Derrick
Boone, Shreyas Patankar, David Goldhaber-Golden, David Mandrus, Stephen E.
Nagler, Ehud Altman, Joseph Orenstein
|
Field evolution of magnons in $\alpha$-RuCl$_3$ by high-resolution
polarized terahertz spectroscopy
|
8 pages, 5 figures in the main text. Appendices are included at the
end of the article
|
Phys. Rev. B 98, 094425 (2018)
|
10.1103/PhysRevB.98.094425
| null |
cond-mat.str-el
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Kitaev quantum spin liquid (KSL) is a theoretically predicted state of
matter whose fractionalized quasiparticles are distinct from bosonic magnons,
the fundamental excitation in ordered magnets. The layered honeycomb
antiferromagnet $\alpha$-RuCl$_3$ is a KSL candidate material, as it can be
driven to a magnetically disordered phase by application of an in-plane
magnetic field, with $H_c \sim 7$ T. Here we report a detailed characterization
of the magnetic excitation spectrum of this material by high-resolution
time-domain terahertz (THz) spectroscopy. We observe two sharp magnon
resonances whose frequencies and amplitudes exhibit a discontinuity as a
function of applied magnetic field, as well as two broader peaks at higher
energy. Below the N\'eel temperature, we find that linear spin wave theory can
account for all of these essential features of the spectra when a
$C_3$-breaking distortion of the honeycomb lattice and the presence of
structural domains are taken into account.
|
[{'version': 'v1', 'created': 'Sun, 3 Jun 2018 19:30:53 GMT'}
{'version': 'v2', 'created': 'Fri, 5 Oct 2018 20:48:43 GMT'}]
|
2018-10-09
|
[array(['Wu', 'Liang', ''], dtype=object)
array(['Little', 'Arielle', ''], dtype=object)
array(['Aldape', 'Erik E.', ''], dtype=object)
array(['Rees', 'Dylan', ''], dtype=object)
array(['Thewalt', 'Eric', ''], dtype=object)
array(['Lampen-Kelley', 'Paula', ''], dtype=object)
array(['Banerjee', 'Arnab', ''], dtype=object)
array(['Bridges', 'Craig A.', ''], dtype=object)
array(['Yan', 'Jiaqiang', ''], dtype=object)
array(['Boone', 'Derrick', ''], dtype=object)
array(['Patankar', 'Shreyas', ''], dtype=object)
array(['Goldhaber-Golden', 'David', ''], dtype=object)
array(['Mandrus', 'David', ''], dtype=object)
array(['Nagler', 'Stephen E.', ''], dtype=object)
array(['Altman', 'Ehud', ''], dtype=object)
array(['Orenstein', 'Joseph', ''], dtype=object)]
|
6,673 |
0801.3926
|
Cen Jung Tjhai
|
C. Tjhai, M. Tomlinson, M. Ambroze and M. Ahmed
|
On the Weight Distribution of the Extended Quadratic Residue Code of
Prime 137
|
Post-print of 7th International ITG Conference on Source and Channel
Coding, Ulm, 14--16 January 2008
| null | null | null |
cs.IT cs.DM math.IT
| null |
The Hamming weight enumerator function of the formally self-dual even, binary
extended quadratic residue code of prime p = 8m + 1 is given by Gleason's
theorem for singly-even code. Using this theorem, the Hamming weight
distribution of the extended quadratic residue is completely determined once
the number of codewords of Hamming weight j A_j, for 0 <= j <= 2m, are known.
The smallest prime for which the Hamming weight distribution of the
corresponding extended quadratic residue code is unknown is 137. It is shown in
this paper that, for p=137 A_2m = A_34 may be obtained with out the need of
exhaustive codeword enumeration. After the remainder of A_j required by
Gleason's theorem are computed and independently verified using their
congruences, the Hamming weight distributions of the binary augmented and
extended quadratic residue codes of prime 137 are derived.
|
[{'version': 'v1', 'created': 'Fri, 25 Jan 2008 12:14:22 GMT'}]
|
2008-01-28
|
[array(['Tjhai', 'C.', ''], dtype=object)
array(['Tomlinson', 'M.', ''], dtype=object)
array(['Ambroze', 'M.', ''], dtype=object)
array(['Ahmed', 'M.', ''], dtype=object)]
|
6,674 |
1701.03489
|
Sudip Bhattacharyya
|
Sudip Bhattacharyya (TIFR, India), Ignazio Bombaci (Universita di Pisa
/ INFN, Italy), Debades Bandyopadhyay (SINP, India), Arun V. Thampan (St.
Joseph's College / IUCAA, India), Domenico Logoteta (INFN, Italy)
|
Millisecond radio pulsars with known masses: parameter values and
equation of state models
|
16 pages, 2 figures, 4 tables, accepted for publication in New
Astronomy
| null |
10.1016/j.newast.2017.01.008
| null |
astro-ph.HE gr-qc nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The recent fast growth of a population of millisecond pulsars with precisely
measured mass provides an excellent opportunity to characterize these compact
stars at an unprecedented level. This is because the stellar parameter values
can be accurately computed for known mass and spin rate and an assumed equation
of state (EoS) model. For each of the 16 such pulsars and for a set of EoS
models from nucleonic, hyperonic, strange quark matter and hybrid classes, we
numerically compute fast spinning stable stellar parameter values considering
the full effect of general relativity. This first detailed catalogue of the
computed parameter values of observed millisecond pulsars provides a testbed to
probe the physics of compact stars, including their formation, evolution and
EoS. We estimate uncertainties on these computed values from the uncertainty of
the measured mass, which could be useful to quantitatively constrain EoS
models. We note that the largest value of the central density $\rho_{\rm c}$ in
our catalogue is $\sim 5.8$ times the nuclear saturation density $\rho_{\rm
sat}$, which is much less than the expected maximum value $13 \rho_{\rm sat}$.
We argue that the $\rho_{\rm c}$-values of at most a small fraction of compact
stars could be much larger than $5.8 \rho_{\rm sat}$. Besides, we find that the
constraints on EoS models from accurate radius measurements could be
significantly biased for some of our pulsars, if stellar $spinning$
configurations are not used to compute the theoretical radius values.
|
[{'version': 'v1', 'created': 'Thu, 12 Jan 2017 20:08:41 GMT'}]
|
2017-01-16
|
[array(['Bhattacharyya', 'Sudip', '', 'TIFR, India'], dtype=object)
array(['Bombaci', 'Ignazio', '', 'Universita di Pisa\n / INFN, Italy'],
dtype=object)
array(['Bandyopadhyay', 'Debades', '', 'SINP, India'], dtype=object)
array(['Thampan', 'Arun V.', '', "St.\n Joseph's College / IUCAA, India"],
dtype=object)
array(['Logoteta', 'Domenico', '', 'INFN, Italy'], dtype=object)]
|
6,675 |
1810.01307
|
Sang Hoon Lee
|
Sang Hoon Lee, Yeonghoon Kim, Sungmin Lee, Xavier Durang, Per
Stenberg, Jae-Hyung Jeon, Ludvig Lizana
|
Mapping the spectrum of 3D communities in human chromosome conformation
capture data
|
16 pages, 2 figures + 6 supplementary figures
|
Sci. Rep. 9, 6859 (2019)
|
10.1038/s41598-019-42212-y
| null |
q-bio.GN cond-mat.stat-mech physics.bio-ph q-bio.MN
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Several experiments show that the three dimensional (3D) organization of
chromosomes affects genetic processes such as transcription and gene
regulation. To better understand this connection, researchers developed the
Hi-C method that is able to detect the pairwise physical contacts of all
chromosomal loci. The Hi-C data show that chromosomes are composed of 3D
compartments that range over a variety of scales. However, it is challenging to
systematically detect these cross-scale structures. Most studies have therefore
designed methods for specific scales to study foremost topologically associated
domains (TADs) and A/B compartments. To go beyond this limitation, we tailor a
network community detection method that finds communities in compact fractal
globule polymer systems. Our method allows us to continuously scan through all
scales with a single resolution parameter. We found: (i) polymer segments
belonging to the same 3D community do not have to be in consecutive order along
the polymer chain. In other words, several TADs may belong to the same 3D
community. (ii) CTCF proteins---a loop-stabilizing protein that is ascribed a
big role in TAD formation---are well correlated with community borders only at
one level of organization. (iii) TADs and A/B compartments are traditionally
treated as two weakly related 3D structures and detected with different
algorithms. With our method, we detect both by simply adjusting the resolution
parameter. We therefore argue that they represent two specific levels of a
continuous spectrum 3D communities, rather than seeing them as different
structural entities.
|
[{'version': 'v1', 'created': 'Tue, 2 Oct 2018 14:49:50 GMT'}
{'version': 'v2', 'created': 'Thu, 2 May 2019 09:44:25 GMT'}]
|
2019-05-03
|
[array(['Lee', 'Sang Hoon', ''], dtype=object)
array(['Kim', 'Yeonghoon', ''], dtype=object)
array(['Lee', 'Sungmin', ''], dtype=object)
array(['Durang', 'Xavier', ''], dtype=object)
array(['Stenberg', 'Per', ''], dtype=object)
array(['Jeon', 'Jae-Hyung', ''], dtype=object)
array(['Lizana', 'Ludvig', ''], dtype=object)]
|
6,676 |
astro-ph/0503633
|
Nathan Smith
|
Gary J. Ferland, Nick Abel, Kris Davidson, and Nathan Smith
|
Physical conditions in the Homunculus
|
9 pages, 3 figs, ASP Conf 332
|
2005, ASP Conf Ser 332, 298
| null | null |
astro-ph
| null |
Conditions within the Homunculus nebula around Eta Car are determined by many
of the same physical processes that occur in molecular clouds in the
interstellar medium. But there is one major exception -- we know when the
ejection occurred and something about its composition and initial state. The
gas was warm, ionized, and dust-free when it was located within the star's
atmosphere and it is currently cold, molecular, and dusty. It undertook this
transformation in a bit over 150 years. It offers a laboratory for the study of
physical processes in a well-constrained environment. We derive a
photoionization model of the Homunculus nebula that reproduces many of its
observed properties. We conclude by outlining how observations of the
Homunculus could address basic problems in the physics of the interstellar
medium.
|
[{'version': 'v1', 'created': 'Tue, 29 Mar 2005 21:20:26 GMT'}]
|
2007-05-23
|
[array(['Ferland', 'Gary J.', ''], dtype=object)
array(['Abel', 'Nick', ''], dtype=object)
array(['Davidson', 'Kris', ''], dtype=object)
array(['Smith', 'Nathan', ''], dtype=object)]
|
6,677 |
1204.5819
|
Alla Moina
|
A.P. Moina
|
Major physical characteristics of Rochelle salt: the role of thermal
strains
|
10 pages, 11 figures
|
Condens. Matter Phys., 2012, vol. 15, No. 1, 13601: 1-10
|
10.5488/CMP.15.13601
| null |
cond-mat.mtrl-sci
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We compare the results for the related to the shear strain \epsilon_4
physical characteristics of Rochelle salt obtained within the recently
developed modified two-sublattice Mitsui model that takes into account the
strain \epsilon_4 and the diagonal components of the strain tensor \epsilon_1,
\epsilon_2, \epsilon_3 with the results of the previous modification of the
Mitsui model with the strain \epsilon_4 only. Within the framework of the model
with the diagonal (thermal expansion) strains, we also reexamine the effects of
the longitudinal electric field E_1 on the dielectric properties of Rochelle
salt.
|
[{'version': 'v1', 'created': 'Thu, 26 Apr 2012 03:07:03 GMT'}]
|
2012-04-27
|
[array(['Moina', 'A. P.', ''], dtype=object)]
|
6,678 |
1708.09505
|
Gaurav Khanna
|
Caroline Mallary, Gaurav Khanna, Richard Price
|
Closed Timelike Curves and "Effective" Superluminal Travel with Naked
Line Singularities
|
10 pages, 5 figures; animation available on YouTube at:
https://youtu.be/ub6PGaygVwA
| null |
10.1088/1361-6382/aad306
| null |
gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We examine closed timelike curves (CTCs) and "effective" superluminal travel
in a spacetime containing naked line singularities, which we call "wires". Each
wire may be straight-line singularity or a ring singularity. The Weak Energy
Condition (WEC) is preserved in all well-defined regions of the spacetime. (The
singularities themselves are not well-defined, so the WEC is undefined there,
but it is never explicitly violated.) Parallel to the wire, "effective"
superluminal travel is possible, in that the wire may be used as a shortcut
between distant regions of spacetime. Our purpose in presenting the
superluminal aspects of the wire is to dispel the commonly held view that
explicit WEC violation is necessary for effective superluminal travel, whereas
in truth the strictures against superluminal travel are more complicated. We
also demonstrate how the existence of such "wires" could create CTCs. We
present a model spacetime which contains two wires which are free to move
relative to each other. This spacetime is asymptotically flat: It becomes a
Minkowski spacetime a finite distance away from each of the wires. The CTCs
under investigation do not need to enter the wires' singularities, and can be
confined to regions that are weak-field: This means that if these wires were
physically possible, they would present causality problems even in nonsingular,
energetically realistic regions of the spacetime. We conclude that the Weak
Energy Condition alone is not sufficient to prevent superluminal travel in
asymptotically flat spacetimes.
|
[{'version': 'v1', 'created': 'Wed, 30 Aug 2017 23:51:17 GMT'}
{'version': 'v2', 'created': 'Thu, 12 Jul 2018 13:00:40 GMT'}]
|
2018-08-29
|
[array(['Mallary', 'Caroline', ''], dtype=object)
array(['Khanna', 'Gaurav', ''], dtype=object)
array(['Price', 'Richard', ''], dtype=object)]
|
6,679 |
2304.03018
|
Lucas Baldo
|
Lucas Baldo, Tomas L\"othman, Patric Holmvall, and Annica M.
Black-Schaffer
|
Defect-induced band restructuring and length scales in twisted bilayer
graphene
|
13 pages, 7 figures
| null | null | null |
cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the effects of single, multiple, and extended defects in the
form of non-magnetic impurities and vacancies in twisted bilayer graphene (TBG)
at and away from the magic angle, using a fully atomistic model and focusing on
the behavior of the flat low-energy moir\'e bands. For strong impurities and
vacancies in the $AA$ region we find a complete removal of one of the four
moir\'e bands, resulting in a significant depletion of the charge density in
the $AA$ regions even at extremely low defect concentrations. We find similar
results for other defect locations, with the exception of the least coordinated
sites in the $AB$ region, where defects instead result in a peculiar band
replacement process within the moir\'e bands. In the vacancy limit, this
process yields a band structure misleadingly similar to the pristine case.
Moreover, we show that triple point fermions, which are the crossing of the
Dirac point by a flat band, appearing for single, periodic, defects, are
generally not preserved when adding extended or multiple defects, and thus
likely not experimentally relevant. We further identify two universal length
scales for defects, consisting of charge modulations on the atomic scale and on
the moir\'e scale, illustrating the importance of both the atomic and moir\'e
structures for understanding TBG. We show that our conclusions hold beyond the
magic angle and for fully isolated defects. In summary, our results demonstrate
that the normal state of TBG and its moir\'e flat bands are extremely sensitive
to both the location and strength of non-magnetic impurities and vacancies,
which should have significant implications for any emergent ordered state.
|
[{'version': 'v1', 'created': 'Thu, 6 Apr 2023 12:06:35 GMT'}]
|
2023-04-07
|
[array(['Baldo', 'Lucas', ''], dtype=object)
array(['Löthman', 'Tomas', ''], dtype=object)
array(['Holmvall', 'Patric', ''], dtype=object)
array(['Black-Schaffer', 'Annica M.', ''], dtype=object)]
|
6,680 |
1504.00527
|
Francis Sergeraert
|
Francis Sergeraert
|
Functional Programming is Free
|
26 pages
| null | null | null |
cs.PL
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A paper has recently been published in SIAM-JC. This paper is faulty: 1) The
standard requirements about the definition of an algorithm are not respected,
2) The main point in the complexity study, namely the functional programming
component, is absent. The Editorial Board of the SIAM JC had been warned a
confirmed publication would be openly commented, it is the role of this text.
|
[{'version': 'v1', 'created': 'Thu, 2 Apr 2015 12:40:18 GMT'}]
|
2015-04-03
|
[array(['Sergeraert', 'Francis', ''], dtype=object)]
|
6,681 |
2304.14942
|
Fabio Carrara PhD
|
Alessio Serra, Fabio Carrara, Maurizio Tesconi and Fabrizio Falchi
|
The Emotions of the Crowd: Learning Image Sentiment from Tweets via
Cross-modal Distillation
| null | null | null | null |
cs.CV
|
http://creativecommons.org/licenses/by/4.0/
|
Trends and opinion mining in social media increasingly focus on novel
interactions involving visual media, like images and short videos, in addition
to text. In this work, we tackle the problem of visual sentiment analysis of
social media images -- specifically, the prediction of image sentiment
polarity. While previous work relied on manually labeled training sets, we
propose an automated approach for building sentiment polarity classifiers based
on a cross-modal distillation paradigm; starting from scraped multimodal (text
+ images) data, we train a student model on the visual modality based on the
outputs of a textual teacher model that analyses the sentiment of the
corresponding textual modality. We applied our method to randomly collected
images crawled from Twitter over three months and produced, after automatic
cleaning, a weakly-labeled dataset of $\sim$1.5 million images. Despite
exploiting noisy labeled samples, our training pipeline produces classifiers
showing strong generalization capabilities and outperforming the current state
of the art on five manually labeled benchmarks for image sentiment polarity
prediction.
|
[{'version': 'v1', 'created': 'Fri, 28 Apr 2023 15:56:02 GMT'}]
|
2023-05-01
|
[array(['Serra', 'Alessio', ''], dtype=object)
array(['Carrara', 'Fabio', ''], dtype=object)
array(['Tesconi', 'Maurizio', ''], dtype=object)
array(['Falchi', 'Fabrizio', ''], dtype=object)]
|
6,682 |
1411.4396
|
Andrea Mondino Dr.
|
Norihisa Ikoma, Andrea Malchiodi and Andrea Mondino
|
Embedded area-constrained Willmore tori of small area in Riemannian
three-manifolds I: Minimization
|
41 pages. Final version to appear in the Proceedings of the London
Math. Society
|
Proc. Lond. Math. Soc. (3) 115 (2017), no. 3, 502-544
|
10.1112/plms.12047
| null |
math.DG math-ph math.AP math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We construct embedded Willmore tori with small area constraint in Riemannian
three-manifolds under some curvature condition used to prevent M\"obius
degeneration. The construction relies on a Lyapunov-Schmidt reduction; to this
aim we establish new geometric expansions of exponentiated small symmetric
Clifford tori and analyze the sharp asymptotic behavior of degenerating tori
under the action of the M\"obius group. In this first work we prove two
existence results by minimizing or maximizing a suitable reduced functional, in
particular we obtain embedded area-constrained Willmore tori (or, equivalently,
toroidal critical points of the Hawking mass under area-constraint) in compact
3-manifolds with constant scalar curvature and in the double Schwarzschild
space. In a forthcoming paper new existence theorems will be achieved via Morse
theory.
|
[{'version': 'v1', 'created': 'Mon, 17 Nov 2014 09:23:57 GMT'}
{'version': 'v2', 'created': 'Sat, 6 May 2017 09:17:47 GMT'}]
|
2019-05-08
|
[array(['Ikoma', 'Norihisa', ''], dtype=object)
array(['Malchiodi', 'Andrea', ''], dtype=object)
array(['Mondino', 'Andrea', ''], dtype=object)]
|
6,683 |
1906.07002
|
Eleonora Zari
|
E. Zari, A. G. A. Brown, and P.T. de Zeeuw
|
Structure, kinematics, and ages of the young stellar populations in the
Orion region
|
17 pages, 18 figures; accepted for publication in A&A
|
A&A 628, A123 (2019)
|
10.1051/0004-6361/201935781
| null |
astro-ph.SR astro-ph.GA
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a study of the three dimensional structure, kinematics, and age
distribution of the Orion OB association, based on the second data release of
the Gaia satellite (Gaia DR2). Our goal is to obtain a complete picture of the
star formation history of the Orion complex and to relate our findings to
theories of sequential and triggered star formation. We select the Orion
population with simple photometric criteria, and we construct a three
dimensional map in galactic Cartesian coordinates to study the physical
arrangement of the stellar clusters in the Orion region. The map shows
structures that extend for roughly $150 \, \mathrm{pc}$ along the line of
sight, divided in multiple sub-clusters. We separate different groups by using
the density based clustering algorithm DBSCAN. We study the kinematic
properties of all the groups found by DBSCAN first by inspecting their proper
motion distribution, and then by applying a kinematic modelling code based on
an iterative maximum likelihood approach, which we use to derive their mean
velocity, velocity dispersion and isotropic expansion. By using an isochrone
fitting procedure we provide ages and extinction values for all the groups. We
confirm the presence of an old population ($\sim 15$ Myr) towards the 25 Ori
region, and we find that groups with ages of $12-15 \, \mathrm{Myr}$ are
present also towards the Belt region. We notice the presence of a population of
$\sim 10$ Myr also in front of the Orion A molecular cloud. Our findings
suggest that star formation in Orion does not follow a simple sequential
scenario, but instead consists of multiple events, which caused kinematic and
physical sub-structure. To fully explain the detailed sequence of events,
specific simulations and further radial velocity data are needed.
|
[{'version': 'v1', 'created': 'Mon, 17 Jun 2019 12:51:44 GMT'}]
|
2019-08-21
|
[array(['Zari', 'E.', ''], dtype=object)
array(['Brown', 'A. G. A.', ''], dtype=object)
array(['de Zeeuw', 'P. T.', ''], dtype=object)]
|
6,684 |
1902.02965
|
Mathias Metsch
|
Mathias H. Metsch, Katharina Senkalla, Benedikt Tratzmiller, Jochen
Scheuer, Michael Kern, Jocelyn Achard, Alexandre Tallaire, Martin B. Plenio,
Petr Siyushev, Fedor Jelezko
|
Initialization and Readout of Nuclear Spins via negatively charged
Silicon-Vacancy Center in Diamond
|
6 pages, 4 figures
|
Phys. Rev. Lett. 122, 190503 (2019)
|
10.1103/PhysRevLett.122.190503
| null |
quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work, we demonstrate initialization and readout of nuclear spins via
a negatively charged silicon-vacancy (SiV) electron spin qubit. Under
Hartmann-Hahn conditions the electron spin polarization is coherently
transferred to the nuclear spin. The readout of the nuclear polarization is
observed via the fluorescence of the SiV. We also show that the coherence time
of the nuclear spin (6 ms) is limited by the electron spin-lattice relaxation
due to the hyperfine coupling to the electron spin. This work paves the way
towards realization of building blocks of quantum hardware with an efficient
spin-photon interface based on the SiV color center coupled to a long lasting
nuclear memory.
|
[{'version': 'v1', 'created': 'Fri, 8 Feb 2019 07:49:07 GMT'}
{'version': 'v2', 'created': 'Fri, 15 Feb 2019 13:21:59 GMT'}
{'version': 'v3', 'created': 'Tue, 19 Feb 2019 18:28:01 GMT'}]
|
2019-05-22
|
[array(['Metsch', 'Mathias H.', ''], dtype=object)
array(['Senkalla', 'Katharina', ''], dtype=object)
array(['Tratzmiller', 'Benedikt', ''], dtype=object)
array(['Scheuer', 'Jochen', ''], dtype=object)
array(['Kern', 'Michael', ''], dtype=object)
array(['Achard', 'Jocelyn', ''], dtype=object)
array(['Tallaire', 'Alexandre', ''], dtype=object)
array(['Plenio', 'Martin B.', ''], dtype=object)
array(['Siyushev', 'Petr', ''], dtype=object)
array(['Jelezko', 'Fedor', ''], dtype=object)]
|
6,685 |
2111.10988
|
SeongUk Park
|
SeongUk Park, Nojun Kwak
|
Local-Selective Feature Distillation for Single Image Super-Resolution
|
in review
| null | null | null |
eess.IV cs.CV
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recent improvements in convolutional neural network (CNN)-based single image
super-resolution (SISR) methods rely heavily on fabricating network
architectures, rather than finding a suitable training algorithm other than
simply minimizing the regression loss. Adapting knowledge distillation (KD) can
open a way for bringing further improvement for SISR, and it is also beneficial
in terms of model efficiency. KD is a model compression method that improves
the performance of Deep Neural Networks (DNNs) without using additional
parameters for testing. It is getting the limelight recently for its competence
at providing a better capacity-performance tradeoff. In this paper, we propose
a novel feature distillation (FD) method which is suitable for SISR. We show
the limitations of the existing FitNet-based FD method that it suffers in the
SISR task, and propose to modify the existing FD algorithm to focus on local
feature information. In addition, we propose a teacher-student-difference-based
soft feature attention method that selectively focuses on specific pixel
locations to extract feature information. We call our method local-selective
feature distillation (LSFD) and verify that our method outperforms conventional
FD methods in SISR problems.
|
[{'version': 'v1', 'created': 'Mon, 22 Nov 2021 05:05:37 GMT'}]
|
2021-11-23
|
[array(['Park', 'SeongUk', ''], dtype=object)
array(['Kwak', 'Nojun', ''], dtype=object)]
|
6,686 |
gr-qc/0307094
|
Stephane Fay
|
Stephane Fay, Jean-Pierre Luminet
|
Isotropisation of flat homogeneous universes with scalar fields
|
35 pages, 11 figures, higher-quality images are available on request
to [email protected], to be published in Class. Quant. Grav
|
Class.Quant.Grav. 21 (2004) 1849-1878
|
10.1088/0264-9381/21/7/009
| null |
gr-qc astro-ph
| null |
Starting from an anisotropic flat cosmological model(Bianchi type $I$), we
show that conditions leading to isotropisation fall into 3 classes,
respectively 1, 2, 3. We look for necessary conditions such that a Bianchi type
$I$ model reaches a stable isotropic state due to the presence of several
massive scalar fields minimally coupled to the metric with a perfect fluid for
class 1 isotropisation. The conditions are written in terms of some functions
$\ell$ of the scalar fields. Two types of theories are studied. The first one
deals with scalar tensor theories resulting from extra-dimensions
compactification, where the Brans-Dicke coupling functions only depend on their
associated scalar fields. The second one is related to the presence of complex
scalar fields. We give the metric and potential asymptotical behaviours
originating from class 1 isotropisation. The results depend on the domination
of the scalar field potential compared to the perfect fluid energy density. We
give explicit examples showing that some hybrid inflation theories do not lead
to isotropy contrary to some high-order theories, whereas the most common forms
of complex scalar fields undergo a class 3 isotropisation, characterised by
strong oscillations of the $\ell$ functions.
|
[{'version': 'v1', 'created': 'Mon, 21 Jul 2003 15:25:04 GMT'}
{'version': 'v2', 'created': 'Tue, 25 Nov 2003 17:36:31 GMT'}
{'version': 'v3', 'created': 'Wed, 18 Feb 2004 12:45:13 GMT'}]
|
2009-11-10
|
[array(['Fay', 'Stephane', ''], dtype=object)
array(['Luminet', 'Jean-Pierre', ''], dtype=object)]
|
6,687 |
1301.3567
|
Haret Rosu
|
Stefan C. Mancas, Haret C. Rosu
|
Integrable equations with Ermakov-Pinney nonlinearities and Chiellini
damping
|
15 pages, 5 figures, 1 appendix, 21 references, published version
|
Appl. Math. Comp. 259 (2015) 1-11
|
10.1016/j.amc.2015.02.037
| null |
math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce a special type of dissipative Ermakov-Pinney equations of the
form v_{\zeta \zeta}+g(v)v_{\zeta}+h(v)=0, where h(v)=h_0(v)+cv^{-3} and the
nonlinear dissipation g(v) is based on the corresponding Chiellini integrable
Abel equation. When h_0(v) is a linear function, h_0(v)=\lambda^2v, general
solutions are obtained following the Abel equation route. Based on particular
solutions, we also provide general solutions containing a factor with the phase
of the Milne type. In addition, the same kinds of general solutions are
constructed for the cases of higher-order Reid nonlinearities. The Chiellini
dissipative function is actually a dissipation-gain function because it can be
negative on some intervals. We also examine the nonlinear case
h_0(v)=\Omega_0^2(v-v^2) and show that it leads to an integrable hyperelliptic
case
|
[{'version': 'v1', 'created': 'Wed, 16 Jan 2013 03:14:53 GMT'}
{'version': 'v2', 'created': 'Wed, 6 Feb 2013 00:22:13 GMT'}
{'version': 'v3', 'created': 'Sat, 18 May 2013 08:50:57 GMT'}
{'version': 'v4', 'created': 'Thu, 5 Mar 2015 03:02:08 GMT'}]
|
2015-03-06
|
[array(['Mancas', 'Stefan C.', ''], dtype=object)
array(['Rosu', 'Haret C.', ''], dtype=object)]
|
6,688 |
0708.0625
|
Ning Bo Zhao
|
Ning Bo Zhao, An Min Wang
|
Hybrid protocol of remote implementations of quantum operations
|
9 pages, 1 figure
| null |
10.1103/PhysRevA.76.062317
| null |
quant-ph
| null |
We propose a protocol of remote implementations of quantum operations by
hybridizing bidirectional quantum state teleportation's (BQST) and Wang's one.
The protocol is available for remote implemetations of quantum operations in
the restricted sets specified in Sec. III. We also give the proof of the
protocol and point out its optimization. As an extension, this hybrid protocol
can be reduced to BQST and Wang protocols.
|
[{'version': 'v1', 'created': 'Sat, 4 Aug 2007 12:14:15 GMT'}]
|
2009-11-13
|
[array(['Zhao', 'Ning Bo', ''], dtype=object)
array(['Wang', 'An Min', ''], dtype=object)]
|
6,689 |
0704.0046
|
Denes Petz
|
I. Csiszar, F. Hiai and D. Petz
|
A limit relation for entropy and channel capacity per unit cost
|
LATEX file, 11 pages
|
J. Math. Phys. 48(2007), 092102.
|
10.1063/1.2779138
| null |
quant-ph cs.IT math.IT
| null |
In a quantum mechanical model, Diosi, Feldmann and Kosloff arrived at a
conjecture stating that the limit of the entropy of certain mixtures is the
relative entropy as system size goes to infinity. The conjecture is proven in
this paper for density matrices. The first proof is analytic and uses the
quantum law of large numbers. The second one clarifies the relation to channel
capacity per unit cost for classical-quantum channels. Both proofs lead to
generalization of the conjecture.
|
[{'version': 'v1', 'created': 'Sun, 1 Apr 2007 16:37:36 GMT'}]
|
2009-11-13
|
[array(['Csiszar', 'I.', ''], dtype=object)
array(['Hiai', 'F.', ''], dtype=object)
array(['Petz', 'D.', ''], dtype=object)]
|
6,690 |
2007.10675
|
Jingyi Huang
|
Jingyi Huang, Yizheng Zhang, Fabio Giardina, Andre Rosendo
|
Trade-off on Sim2Real Learning: Real-world Learning Faster than
Simulations
|
To be published in 2022 8th International Conference on Control,
Automation and Robotics (ICCAR)
| null | null | null |
cs.RO cs.AI cs.LG
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Deep Reinforcement Learning (DRL) experiments are commonly performed in
simulated environments due to the tremendous training sample demands from deep
neural networks. In contrast, model-based Bayesian Learning allows a robot to
learn good policies within a few trials in the real world. Although it takes
fewer iterations, Bayesian methods pay a relatively higher computational cost
per trial, and the advantage of such methods is strongly tied to dimensionality
and noise. In here, we compare a Deep Bayesian Learning algorithm with a
model-free DRL algorithm while analyzing our results collected from both
simulations and real-world experiments. While considering Sim and Real
learning, our experiments show that the sample-efficient Deep Bayesian RL
performance is better than DRL even when computation time (as opposed to number
of iterations) is taken in consideration. Additionally, the difference in
computation time between Deep Bayesian RL performed in simulation and in
experiments point to a viable path to traverse the reality gap. We also show
that a mix between Sim and Real does not outperform a purely Real approach,
pointing to the possibility that reality can provide the best prior knowledge
to a Bayesian Learning. Roboticists design and build robots every day, and our
results show that a higher learning efficiency in the real-world will shorten
the time between design and deployment by skipping simulations.
|
[{'version': 'v1', 'created': 'Tue, 21 Jul 2020 09:28:18 GMT'}
{'version': 'v2', 'created': 'Mon, 3 May 2021 09:09:21 GMT'}
{'version': 'v3', 'created': 'Tue, 14 Dec 2021 04:40:07 GMT'}
{'version': 'v4', 'created': 'Mon, 10 Jan 2022 06:24:14 GMT'}]
|
2022-01-11
|
[array(['Huang', 'Jingyi', ''], dtype=object)
array(['Zhang', 'Yizheng', ''], dtype=object)
array(['Giardina', 'Fabio', ''], dtype=object)
array(['Rosendo', 'Andre', ''], dtype=object)]
|
6,691 |
hep-ph/9504428
|
Alakabha Datta
|
Alakabha Datta
|
Non-Leptonic two body decays of Charmed and \Lambda_b Baryons
|
15 pages, Latex, no figures, minor typing errors corrected
| null | null |
UH-511-824-95
|
hep-ph
| null |
We calculate the two body Cabibbo allowed non-leptonic decays of charmed
baryons $\Lambda_c$ and $\Xi_c$ which involve transitions of a heavy quark to a
light quark. We use data on the Cabbibo favoured non-leptonic decays $\Lambda_c
\rightarrow \Lambda \pi^{+}$ and $\Lambda_c \rightarrow \Sigma^{+} \pi^{0 }$ to
obtain information on the form factors in the $c \rightarrow s $ transition. We
also calculate the decay $\Lambda_c \rightarrow p \phi$. Using HQET the
information on form factors from the $c \rightarrow s $ transition is used to
model the form factors in $b \rightarrow s $ transition which are then used in
the study of $\Lambda_b \rightarrow J/ \psi \Lambda $ decay.
|
[{'version': 'v1', 'created': 'Sat, 29 Apr 1995 00:24:01 GMT'}
{'version': 'v2', 'created': 'Mon, 1 May 1995 01:06:48 GMT'}]
|
2008-02-03
|
[array(['Datta', 'Alakabha', ''], dtype=object)]
|
6,692 |
1605.07322
|
Asahi Takaoka
|
Asahi Takaoka
|
Recognizing Simple-Triangle Graphs by Restricted 2-Chain Subgraph Cover
|
13 pages, 14 figures, the Author's accepted version of a paper in
WALCOM 2017, Keywords: Chain cover, Graph sandwich problem, PI graphs,
Simple-triangle graphs, Threshold dimension 2 graphs
|
WALCOM: Algorithms and Computation. Volume 10167 of Lecture Notes
in Computer Science (2017) 177-189
|
10.1007/978-3-319-53925-6_14
| null |
cs.DM
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A simple-triangle graph (also known as a PI graph) is the intersection graph
of a family of triangles defined by a point on a horizontal line and an
interval on another horizontal line. The recognition problem for
simple-triangle graphs was a longstanding open problem, and recently a
polynomial-time algorithm has been given [G. B. Mertzios, The Recognition of
Simple-Triangle Graphs and of Linear-Interval Orders is Polynomial, SIAM J.
Discrete Math., 29(3):1150--1185, 2015]. Along with the approach of this paper,
we show a simpler recognition algorithm for simple-triangle graphs. To do this,
we provide a polynomial-time algorithm to solve the following problem: Given a
bipartite graph $G$ and a set $F$ of edges of $G$, find a 2-chain subgraph
cover of $G$ such that one of two chain subgraphs has no edges in $F$.
|
[{'version': 'v1', 'created': 'Tue, 24 May 2016 07:26:39 GMT'}
{'version': 'v2', 'created': 'Mon, 3 Apr 2017 05:31:52 GMT'}]
|
2017-04-04
|
[array(['Takaoka', 'Asahi', ''], dtype=object)]
|
6,693 |
2106.02696
|
L\'azaro Lugo
|
L\'azaro Lugo, Carlos Segura, Gara Miranda
|
A Diversity-Aware Memetic Algorithm for the Linear Ordering Problem:
Improving Best-Known Solutions for Standard Benchmarks
|
The Supplementary Material and source code are available at:
https://github.com/carlossegurag/LOP_MA-EDM
| null | null | null |
math.OC
|
http://creativecommons.org/licenses/by-nc-nd/4.0/
|
The Linear Ordering Problem (LOP) is a very popular NP-hard combinatorial
optimization problem with many practical applications that may require the use
of large instances. The Linear Ordering Library (LOLIB) gathers a set of
standard benchmarks widely used in the validation of solvers for the LOP. Among
them, the xLOLIB2 collects some of the largest and most challenging instances
in current literature. In this work, we present new best-known solutions for
each of the 200 complex instances that comprises xLOLIB2. Moreover, the
proposal devised in this research is able to achieve all current best-known
solutions in the rest of instances of LOLIB and improve them in other 93 cases
out of 485, meaning that important advances in terms of quality and robustness
are attained. This important advance in the field of the LOP has been possible
thanks to the development of a novel Memetic Algorithm (MA) that was designed
by taking into account some of the weaknesses of state-of-the-art LOP solvers.
One of the keys to success is that the novel proposal allows for a gradual
shift from exploration to exploitation, which is done by taking into account
the stopping criterion and elapsed period of execution to alter the internal
decisions taken by the optimizer. The novel diversity-aware proposal is called
the Memetic Algorithm with Explicit Diversity Management (MA-EDM) and extensive
comparisons against state-of-the-art techniques provide insights into the
reasons for the superiority of MA-EDM.
|
[{'version': 'v1', 'created': 'Fri, 4 Jun 2021 20:16:53 GMT'}
{'version': 'v2', 'created': 'Tue, 11 Jan 2022 02:11:25 GMT'}]
|
2022-01-12
|
[array(['Lugo', 'Lázaro', ''], dtype=object)
array(['Segura', 'Carlos', ''], dtype=object)
array(['Miranda', 'Gara', ''], dtype=object)]
|
6,694 |
1402.0572
|
Yoram Bachrach
|
Yoram Bachrach, Ely Porat Porat, Jeffrey S. Rosenschein
|
Sharing Rewards in Cooperative Connectivity Games
| null |
Journal Of Artificial Intelligence Research, Volume 47, pages
281-311, 2013
|
10.1613/jair.3841
| null |
cs.GT
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider how selfish agents are likely to share revenues derived from
maintaining connectivity between important network servers. We model a network
where a failure of one node may disrupt communication between other nodes as a
cooperative game called the vertex Connectivity Game (CG). In this game, each
agent owns a vertex, and controls all the edges going to and from that vertex.
A coalition of agents wins if it fully connects a certain subset of vertices in
the graph, called the primary vertices. Power indices measure an agents ability
to affect the outcome of the game. We show that in our domain, such indices can
be used to both determine the fair share of the revenues an agent is entitled
to, and identify significant possible points of failure affecting the
reliability of communication in the network. We show that in general graphs,
calculating the Shapley and Banzhaf power indices is #P-complete, but suggest a
polynomial algorithm for calculating them in trees. We also investigate finding
stable payoff divisions of the revenues in CGs, captured by the game theoretic
solution of the core, and its relaxations, the epsilon-core and least core. We
show a polynomial algorithm for computing the core of a CG, but show that
testing whether an imputation is in the epsilon-core is coNP-complete. Finally,
we show that for trees, it is possible to test for epsilon-core imputations in
polynomial time.
|
[{'version': 'v1', 'created': 'Tue, 4 Feb 2014 01:38:31 GMT'}]
|
2014-02-05
|
[array(['Bachrach', 'Yoram', ''], dtype=object)
array(['Porat', 'Ely Porat', ''], dtype=object)
array(['Rosenschein', 'Jeffrey S.', ''], dtype=object)]
|
6,695 |
1610.06828
|
Alexey Shcherbakov A.
|
Andrey A. Ushkov and Alexey A. Shcherbakov
|
Concurrency of anisotropy and spatial dispersion in low refractive index
dielectric composites
|
12 pages, 5 figures
|
Opt. Express 25, 243-249 (2017)
|
10.1364/OE.25.000243
| null |
physics.optics
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The article demonstrates uncommon manifestation of spatial dispersion in low
refractive index contrast 3D periodic dielectric composites with periods of
about one tenth of the wavelength. First principles simulations by the well
established plane wave method reveal that spatial dispersion leads to
appearance of additional optical axes and can compensate anisotropy in certain
directions.
|
[{'version': 'v1', 'created': 'Fri, 21 Oct 2016 15:50:42 GMT'}
{'version': 'v2', 'created': 'Mon, 31 Jul 2017 14:01:39 GMT'}]
|
2017-08-01
|
[array(['Ushkov', 'Andrey A.', ''], dtype=object)
array(['Shcherbakov', 'Alexey A.', ''], dtype=object)]
|
6,696 |
1410.7495
|
James Heyman
|
J. N. Heyman (1), J. D. Stein (1), Z. S. Kaminski (1), A. R. Banman
(1), A. M. Massari (2), J.T. Robinson (3) ((1) Macalester College, (2)
University of Minnesota, (3) Naval Research Laboratory)
|
Carrier Heating and Negative Photoconductivity in Graphene
|
15 pages, 4 figures
| null |
10.1063/1.4905192
| null |
cond-mat.mtrl-sci cond-mat.mes-hall
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigated negative photoconductivity in graphene using ultrafast
terahertz techniques. Infrared transmission was used to determine the Fermi
energy, carrier density and mobility of p-type CVD graphene samples.
Time-resolved terahertz photoconductivity measurements using a tunable
mid-infrared pump probed these samples at photon energies between 0.35eV to
1.55eV, approximately one half to three times the Fermi energy of the samples.
Although interband optical transitions in graphene are blocked for pump photon
energies less than twice the Fermi energy, we observe negative
photoconductivity at all pump photon energies investigated, indicating that
interband excitation is not required to observe this effect. Our results are
consistent with a thermalized free carrier population that cools by
electron-phonon scattering, but inconsistent with models of negative
photoconductivity based on population inversion.
|
[{'version': 'v1', 'created': 'Tue, 28 Oct 2014 02:35:23 GMT'}]
|
2015-06-23
|
[array(['Heyman', 'J. N.', ''], dtype=object)
array(['Stein', 'J. D.', ''], dtype=object)
array(['Kaminski', 'Z. S.', ''], dtype=object)
array(['Banman', 'A. R.', ''], dtype=object)
array(['Massari', 'A. M.', ''], dtype=object)
array(['Robinson', 'J. T.', ''], dtype=object)]
|
6,697 |
2009.06840
|
Mengyu Cao
|
Mengyu Cao, Benjian Lv, Kaishun Wang and Sanming Zhou
|
Extremal even-cycle-free subgraphs of the complete transposition graphs
|
16 pages, 1 figure
| null | null | null |
math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Given graphs $G$ and $H$, the generalized Tur\'{a}n number ${\rm ex}(G,H)$ is
the maximum number of edges in an $H$-free subgraph of $G$. In this paper, we
obtain an asymptotic upper bound on ${\rm ex}(CT_n,C_{2l})$ for any $n \ge 3$
and $l\geq2$, where $C_{2l}$ is the cycle of length $2l$ and $CT_n$ is the
complete transposition graph which is defined as the Cayley graph on the
symmetric group ${\rm S}_n$ with respect to the set of all transpositions of
${\rm S}_n$.
|
[{'version': 'v1', 'created': 'Tue, 15 Sep 2020 02:36:01 GMT'}]
|
2020-09-16
|
[array(['Cao', 'Mengyu', ''], dtype=object)
array(['Lv', 'Benjian', ''], dtype=object)
array(['Wang', 'Kaishun', ''], dtype=object)
array(['Zhou', 'Sanming', ''], dtype=object)]
|
6,698 |
1009.1870
|
Pau Amaro-Seoane
|
Pau Amaro-Seoane and Marc Dewi Freitag
|
Relativistic encounters in dense stellar systems
|
A small note of 5 pages, accepted for publication MNRAS after minor
modifications
| null |
10.1111/j.1365-2966.2010.17925.x
| null |
astro-ph.CO astro-ph.GA gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Two coalescing black holes (BHs) represent a conspicuous source of
gravitational waves (GWs). The merger involves 17 parameters in the general
case of Kerr BHs, so that a successful identification and parameter extraction
of the information encoded in the waves will provide us with a detailed
description of the physics of BHs. A search based on matched-filtering for
characterization and parameter extraction requires the development of some
$10^{15}$ waveforms. If a third additional BH perturbed the system, the
waveforms would not be applicable, and we would need to increase the number of
templates required for a valid detection. In this letter, we calculate the
probability that more than two BHs interact in the regime of strong relativity
in a dense stellar cluster. We determine the physical properties necessary in a
stellar system for three black holes to have a close encounter in this regime
and also for an existing binary of two BHs to have a strong interaction with a
third hole. In both cases the event rate is negligible. While dense stellar
systems such as galactic nuclei, globular clusters and nuclear stellar clusters
are the breeding grounds for the sources of gravitational waves that
ground-based detectors like Advanced LIGO and Advanced VIRGO will be exploring,
the analysis of the waveforms in full general relativity needs only to evaluate
the two-body problem. This reduces the number of templates of waveforms to
create by orders of magnitude.
|
[{'version': 'v1', 'created': 'Thu, 9 Sep 2010 20:00:02 GMT'}
{'version': 'v2', 'created': 'Wed, 27 Oct 2010 12:20:57 GMT'}]
|
2015-05-19
|
[array(['Amaro-Seoane', 'Pau', ''], dtype=object)
array(['Freitag', 'Marc Dewi', ''], dtype=object)]
|
6,699 |
1506.07693
|
Julia Komjathy
|
Julia Komjathy and Viktoria Vadon
|
First passage percolation on the Newman-Watts small world model
|
29 pages, 4 figures
|
Journal of Statistical Phyisics, Vol 162, (4) pp 959-993, 2016
|
10.1007/s10955-015-1442-3
| null |
math.PR math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The Newman-Watts model is given by taking a cycle graph of n vertices and
then adding each possible edge $(i,j), |i-j|\neq 1 \mod n$ with probability
$\rho/n$ for some $\rho>0$ constant. In this paper we add i.i.d. exponential
edge weights to this graph, and investigate typical distances in the
corresponding random metric space given by the least weight paths between
vertices. We show that typical distances grow as $\frac1\lambda \log n$ for a
$\lambda>0$ and determine the distribution of smaller order terms in terms of
limits of branching process random variables. We prove that the number of edges
along the shortest weight path follows a Central Limit Theorem, and show that
in a corresponding epidemic spread model the fraction of infected vertices
follows a deterministic curve with a random shift.
|
[{'version': 'v1', 'created': 'Thu, 25 Jun 2015 10:27:55 GMT'}
{'version': 'v2', 'created': 'Fri, 26 Jun 2015 06:17:28 GMT'}]
|
2016-09-26
|
[array(['Komjathy', 'Julia', ''], dtype=object)
array(['Vadon', 'Viktoria', ''], dtype=object)]
|
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