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cond-mat/9608067 | Murray. Batchelor | M. T. Batchelor | Reflection equations and surface critical phenomena | 8 pages, PostScript file, talk given in Tianjin, August 1995. To
appear in "Statistical Models, Yang-Baxter Equation and Related Topics", M.L.
Ge and F.Y. Wu eds, World Scientific, Singapore (1996) pp 41-48 | null | null | ANU-MRR 091-95 | cond-mat hep-th nlin.SI solv-int | null | A brief review is given of recent developments in the study of surface
critical phenomena from the viewpoint of exactly solved lattice models. These
developments include exact results for the polymer adsorption transition and
the surface critical exponents of the eight-vertex model.
| [
{
"version": "v1",
"created": "Fri, 16 Aug 1996 07:39:48 GMT"
}
] | 2008-02-03T00:00:00 | [
[
"Batchelor",
"M. T.",
""
]
] | |
1511.04795 | Laura Mersini-Houghton | Laura Mersini-Houghton | Entropy of the Information Retrieved from Black Holes | 9 pgs., 1 figure | null | 10.1088/0264-9381/33/13/137001 | null | hep-th gr-qc hep-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The retrieval of black hole information was recently presented in two
interesting proposals in the 'Hawking Radiation' conference: a revised version
by G. 't Hooft of a proposal he initially suggested 20 years ago and, a new
proposal by S. Hawking. Both proposals address the problem of black hole
information loss at the classical level and derive an expression for the
scattering matrix. The former uses gravitation back reaction of incoming
particles that imprints its information on the outgoing modes. The latter uses
supertranslation symmetry of horizons to relate a phase delay of the outgoing
wave packet compared to their incoming wave partners. The difficulty in both
proposals is that the entropy obtained from them appears to be infinite.
By including quantum effects into the Hawking and 't Hooft's proposals, I
show that a subtlety arising from the inescapable measurement process, the
Quantum Zeno Effect, not only tames divergences but it actually recovers the
correct $1/4$ of the area Bekenstein-Hawking entropy law of black holes.
| [
{
"version": "v1",
"created": "Mon, 16 Nov 2015 01:18:37 GMT"
}
] | 2016-06-15T00:00:00 | [
[
"Mersini-Houghton",
"Laura",
""
]
] | |
1104.3599 | David Bermudez M. Sc. | David Bermudez and David J. Fernandez C | Non-hermitian Hamiltonians and Painlev\'e IV equation with real
parameters | 10 pages, 7 figures | Phys.Lett.A375:2974-2978,2011 | 10.1016/j.physleta.2011.06.042 | null | math-ph hep-th math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter we will use higher-order supersymmetric quantum mechanics to
obtain several families of complex solutions of the Painleve IV equation with
real parameters. We shall also study the algebraic structure, the
eigenfunctions and the energy spectra of the corresponding non-hermitian
Hamiltonians.
| [
{
"version": "v1",
"created": "Mon, 18 Apr 2011 22:19:23 GMT"
},
{
"version": "v2",
"created": "Thu, 16 Jun 2011 16:51:56 GMT"
}
] | 2011-07-20T00:00:00 | [
[
"Bermudez",
"David",
""
],
[
"C",
"David J. Fernandez",
""
]
] | |
2407.09703 | Pablo Ramses Alonso-Martin Mr | Pablo Ramses Alonso-Martin, Horatio Boedihardjo and Anastasia
Papavasiliou | Statistical Inference for the Rough Homogenization Limit of Multiscale
Fractional Ornstein-Uhlenbeck Processes | 34 pages, 5 figures | null | null | null | math.ST stat.TH | http://creativecommons.org/licenses/by/4.0/ | Most real-world systems exhibit a multiscale behaviour that needs to be taken
into consideration when fitting the effective dynamics to data sampled at a
given scale. In the case of stochastic multiscale systems driven by Brownian
motion, it has been shown that in order for the Maximum Likelihood Estimators
of the parameters of the limiting dynamics to be consistent, data needs to be
subsampled at an appropriate rate. Recent advances in extracting effective
dynamics for fractional multiscale systems make the same question relevant in
the fractional diffusion setting. We study the problem of parameter estimation
of the diffusion coefficient in this context. In particular, we consider the
multiscale fractional Ornstein-Uhlenbeck system (fractional kinetic Brownian
motion) and we provide convergence results for the Maximum Likelihood Estimator
of the diffusion coefficient of the limiting dynamics, using multiscale data.
To do so, we derive asymptotic bounds for the spectral norm of the inverse
covariance matrix of fractional Gaussian noise.
| [
{
"version": "v1",
"created": "Fri, 12 Jul 2024 22:07:56 GMT"
}
] | 2024-07-16T00:00:00 | [
[
"Alonso-Martin",
"Pablo Ramses",
""
],
[
"Boedihardjo",
"Horatio",
""
],
[
"Papavasiliou",
"Anastasia",
""
]
] | |
2212.06036 | Tianchen Huang | Tianchen Huang | The spatial accessibility of attractive parks in Chicago and a proposed
planning support system to evaluate the accessibility of POIs | null | null | null | null | physics.soc-ph cs.CY | http://creativecommons.org/licenses/by-nc-sa/4.0/ | Urban parks play an essential role in meeting the ecological, social, and
recreational requirements of residents. Access to urban parks reflects people's
quality of life. The present research focused on the cumulative accessibility
by walking and driving to attractive urban parks for different population
groups in Chicago. The present study used the ratings and the number of reviews
on Google Maps to evaluate each parks' attractiveness. The results present the
cumulative accessibility scores using gravity, linear, and kernel models. In
addition, the spatial distribution of the accessibility to parks for population
groups of different races and levels of income are shown at the 90 m X 90 m
land cell scale and at the community level. Highly attractive parks that people
walk to receive a high accessibility score. However, parks with high
accessibility scores that people drive to were along the major highways. The
present study also determined that the Black and high-income populations have a
higher accessibility score to parks than other population groups. Moreover, a
planning supporting system is proposed that uses rating data that can be
gathered from apps such as Google Maps and Yelp to evaluate all types of Points
of Interest (POIs) in parks.
| [
{
"version": "v1",
"created": "Sun, 25 Sep 2022 18:02:35 GMT"
}
] | 2022-12-13T00:00:00 | [
[
"Huang",
"Tianchen",
""
]
] | |
quant-ph/0410162 | Toshio Fukumi | Toshio Fukumi | Stasistically constrained operator associated with additivity of
communication channel | 6 pages, 2 figures, Quantum Optics and Application in Computation and
Communication (Nov. 2004 Beijing) | null | 10.1117/12.583213 | null | quant-ph | null | Additivity of quantum communication channel is discussed in terms of Poisson
process to show it is additive in probability. Poisson process is shown to be
responsible for entanglement which is a rare event.
| [
{
"version": "v1",
"created": "Thu, 21 Oct 2004 08:46:52 GMT"
}
] | 2009-11-10T00:00:00 | [
[
"Fukumi",
"Toshio",
""
]
] | |
1708.08718 | Haiyang Wang | Haiyang S. Wang, Charles H. Lineweaver, Trevor R. Ireland | The Elemental Abundances (with Uncertainties) of the Most Earth-like
Planet | 24 pages, 8 figures and 5 tables; Accepted by Icarus on 21 August
2017, in press. doi.org/10.1016/j.icarus.2017.08.024 | null | 10.1016/j.icarus.2017.08.024 | null | astro-ph.EP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To first order, the Earth as well as other rocky planets in the Solar System
and rocky exoplanets orbiting other stars, are refractory pieces of the stellar
nebula out of which they formed. To estimate the chemical composition of rocky
exoplanets based on their stellar hosts' elemental abundances, we need a better
understanding of the devolatilization that produced the Earth. To quantify the
chemical relationships between the Earth, the Sun and other bodies in the Solar
System, the elemental abundances of the bulk Earth are required. The key to
comparing Earth's composition with those of other objects is to have a
determination of the bulk composition with an appropriate estimate of
uncertainties. Here we present concordance estimates (with uncertainties) of
the elemental abundances of the bulk Earth, which can be used in such studies.
First we compile, combine and renormalize a large set of heterogeneous
literature values of the primitive mantle (PM) and of the core. We then
integrate standard radial density profiles of the Earth and renormalize them to
the current best estimate for the mass of the Earth. Using estimates of the
uncertainties in i) the density profiles, ii) the core-mantle boundary and iii)
the inner core boundary, we employ standard error propagation to obtain a core
mass fraction of $32.5 \pm 0.3$ wt%. Our bulk Earth abundances are the weighted
sum of our concordance core abundances and concordance PM abundances. Our
concordance estimates for the abundances of Mg, Sn, Br, B, Cd and Be are
significantly lower than previous estimates of the bulk Earth. Our concordance
estimates for the abundances of Na, K, Cl, Zn, Sr, F, Ga, Rb, Nb, Gd, Ta, He,
Ar, and Kr are significantly higher. The uncertainties on our elemental
abundances usefully calibrate the unresolved discrepancies between standard
Earth models under various geochemical and geophysical assumptions.
| [
{
"version": "v1",
"created": "Tue, 29 Aug 2017 12:08:19 GMT"
}
] | 2017-09-13T00:00:00 | [
[
"Wang",
"Haiyang S.",
""
],
[
"Lineweaver",
"Charles H.",
""
],
[
"Ireland",
"Trevor R.",
""
]
] | |
2010.07690 | Tariq Syed | Tariq Syed | Cancellation of vector bundles of rank $3$ with trivial Chern classes on
smooth affine fourfolds | 26 pages, to appear in JPAA | null | null | null | math.AG math.AC math.KT | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If $n \equiv 0,1~mod~4$, we prove a sum formula $V_{\theta_{0}}
(a_{0},a_{R}^{n}) = n \cdot V_{\theta_{0}} (a_{0},a_{R})$ for the generalized
Vaserstein symbol whenever $R$ is a smooth affine algebra over a perfect field
$k$ with $char(k) \neq 2$ such that $-1 \in {k^{\times}}^{2}$. This enables us
to generalize a result of Fasel-Rao-Swan on transformations of unimodular rows
via elementary matrices over normal affine algebras of dimension $d \geq 4$
over algebraically closed fields of characteristic $\neq 2$. As a consequence,
we prove that any projective module of rank $3$ with trivial Chern classes over
a smooth affine algebra of dimension $4$ over an algebraically closed field $k$
with $char(k) \neq 2,3$ is cancellative.
| [
{
"version": "v1",
"created": "Tue, 13 Oct 2020 20:28:04 GMT"
},
{
"version": "v2",
"created": "Mon, 21 Feb 2022 22:50:28 GMT"
}
] | 2022-02-23T00:00:00 | [
[
"Syed",
"Tariq",
""
]
] | |
0811.0955 | Christopher L. Henley | Brond E. Larson and Christopher L. Henley | Effective Hamiltonians for state selection in Heisenberg
antiferromagnets | 11 pp. LaTeX. Added sec II C, rearranged/improved Sec III B/C, added
a few references, small corrections/additions throughout | null | null | null | cond-mat.stat-mech cond-mat.str-el | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In frustrated antiferromagnets with isotropic exchange interactions, there is
typically a manifold of degenerate classical ground states. This degeneracy is
broken by the (free) energy of quantum or thermal fluctuations, or the uniform
effects of bond disorder. We derive effective Hamiltonians to express each kind
of selection effect, in both exact forms and convenient approximate forms. It
is argued that biquadratic terms, representing the collinear-selecting effects
of quantum fluctuations, should be included in classical simulations of
large-$S$ frustrated magnets at low temperatures
| [
{
"version": "v1",
"created": "Thu, 6 Nov 2008 14:20:18 GMT"
},
{
"version": "v2",
"created": "Mon, 28 Sep 2009 13:51:09 GMT"
}
] | 2009-09-28T00:00:00 | [
[
"Larson",
"Brond E.",
""
],
[
"Henley",
"Christopher L.",
""
]
] | |
1701.07759 | Matej Kuhar | Matej Kuhar, S\"am Krucker, Iain G. Hannah, Lindsay Glesener, Pascal
Saint-Hilaire, Brian W. Grefenstette, Hugh S. Hudson, Stephen M. White, David
M. Smith, Andrew J. Marsh, Paul J. Wright, Steven E. Boggs, Finn E.
Christensen, William W. Craig, Charles J. Hailey, Fiona A. Harrison, Daniel
Stern, William W. Zhang | Evidence of Significant Energy Input in the Late Phase of a Solar Flare
from NuSTAR X-Ray Observations | Published in ApJ, 8 pages | The Astrophysical Journal, 835:6, 2017 January 20 | 10.3847/1538-4357/835/1/6 | null | astro-ph.SR astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present observations of the occulted active region AR12222 during the
third {\em NuSTAR} solar campaign on 2014 December 11, with concurrent {\em
SDO/}AIA and {\em FOXSI-2} sounding rocket observations. The active region
produced a medium size solar flare one day before the observations, at
$\sim18$UT on 2014 December 10, with the post-flare loops still visible at the
time of {\em NuSTAR} observations. The time evolution of the source emission in
the {\em SDO/}AIA $335\textrm{\AA}$ channel reveals the characteristics of an
extreme-ultraviolet late phase event, caused by the continuous formation of new
post-flare loops that arch higher and higher in the solar corona. The spectral
fitting of {\em NuSTAR} observations yields an isothermal source, with
temperature $3.8-4.6$ MK, emission measure $0.3-1.8 \times 10^{46}\textrm{
cm}^{-3}$, and density estimated at $2.5-6.0 \times 10^8 \textrm{ cm}^{-3}$.
The observed AIA fluxes are consistent with the derived {\em NuSTAR}
temperature range, favoring temperature values in the range $4.0-4.3$ MK. By
examining the post-flare loops' cooling times and energy content, we estimate
that at least 12 sets of post-flare loops were formed and subsequently cooled
between the onset of the flare and {\em NuSTAR} observations, with their total
thermal energy content an order of magnitude larger than the energy content at
flare peak time. This indicates that the standard approach of using only the
flare peak time to derive the total thermal energy content of a flare can lead
to a large underestimation of its value.
| [
{
"version": "v1",
"created": "Thu, 26 Jan 2017 16:21:41 GMT"
}
] | 2017-01-27T00:00:00 | [
[
"Kuhar",
"Matej",
""
],
[
"Krucker",
"Säm",
""
],
[
"Hannah",
"Iain G.",
""
],
[
"Glesener",
"Lindsay",
""
],
[
"Saint-Hilaire",
"Pascal",
""
],
[
"Grefenstette",
"Brian W.",
""
],
[
"Hudson",
"Hugh S.",
""
],
[
"White",
"Stephen M.",
""
],
[
"Smith",
"David M.",
""
],
[
"Marsh",
"Andrew J.",
""
],
[
"Wright",
"Paul J.",
""
],
[
"Boggs",
"Steven E.",
""
],
[
"Christensen",
"Finn E.",
""
],
[
"Craig",
"William W.",
""
],
[
"Hailey",
"Charles J.",
""
],
[
"Harrison",
"Fiona A.",
""
],
[
"Stern",
"Daniel",
""
],
[
"Zhang",
"William W.",
""
]
] | |
1605.09684 | Angus Williams | Angus A. Williams, N.W. Evans, Matthew Molloy, Georges Kordopatis,
M.C. Smith, J. Shen, G. Gilmore, S. Randich, T. Bensby, P. Francois, S.E
Koposov, A. Recio-Blanco, A. Bayo, G. Carraro, A. Casey, T. Costado, E.
Franciosini, A. Hourihane, P. de Laverny, J. Lewis, K. Lind, L. Magrini, L.
Monaco, L. Morbidelli, G.G Sacco, C. Worley, S. Zaggia, S. Mikolaitis | The Gaia-ESO survey: Metal-rich bananas in the bulge | 6 pages, 8 figures, accepted to ApJ Letters | null | 10.3847/2041-8205/824/2/L29 | null | astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the kinematics of $\sim 2000$ giant stars in the direction of the
Galactic bulge, extracted from the Gaia-ESO survey in the region $-10^\circ
\lesssim \ell \lesssim 10^\circ$ and $-11^\circ \lesssim b \lesssim -3^\circ$.
We find distinct kinematic trends in the metal rich ($\mathrm{[M/H]}>0$) and
metal poor ($\mathrm{[M/H]}<0$) stars in the data. The velocity dispersion of
the metal-rich stars drops steeply with latitude, compared to a flat profile in
the metal-poor stars, as has been seen previously. We argue that the metal-rich
stars in this region are mostly on orbits that support the boxy-peanut shape of
the bulge, which naturally explains the drop in their velocity dispersion
profile with latitude. The metal rich stars also exhibit peaky features in
their line-of-sight velocity histograms, particularly along the minor axis of
the bulge. We propose that these features are due to stars on resonant orbits
supporting the boxy-peanut bulge. This conjecture is strengthened through the
comparison of the minor axis data with the velocity histograms of resonant
orbits generated in simulations of buckled bars. The 'banana' or 2:1:2 orbits
provide strongly bimodal histograms with narrow velocity peaks that resemble
the Gaia-ESO metal-rich data.
| [
{
"version": "v1",
"created": "Tue, 31 May 2016 15:54:11 GMT"
}
] | 2016-06-29T00:00:00 | [
[
"Williams",
"Angus A.",
""
],
[
"Evans",
"N. W.",
""
],
[
"Molloy",
"Matthew",
""
],
[
"Kordopatis",
"Georges",
""
],
[
"Smith",
"M. C.",
""
],
[
"Shen",
"J.",
""
],
[
"Gilmore",
"G.",
""
],
[
"Randich",
"S.",
""
],
[
"Bensby",
"T.",
""
],
[
"Francois",
"P.",
""
],
[
"Koposov",
"S. E",
""
],
[
"Recio-Blanco",
"A.",
""
],
[
"Bayo",
"A.",
""
],
[
"Carraro",
"G.",
""
],
[
"Casey",
"A.",
""
],
[
"Costado",
"T.",
""
],
[
"Franciosini",
"E.",
""
],
[
"Hourihane",
"A.",
""
],
[
"de Laverny",
"P.",
""
],
[
"Lewis",
"J.",
""
],
[
"Lind",
"K.",
""
],
[
"Magrini",
"L.",
""
],
[
"Monaco",
"L.",
""
],
[
"Morbidelli",
"L.",
""
],
[
"Sacco",
"G. G",
""
],
[
"Worley",
"C.",
""
],
[
"Zaggia",
"S.",
""
],
[
"Mikolaitis",
"S.",
""
]
] | |
1912.10104 | Gabriela Araujo Dr | Gabriela Araujo-Pardo, Juan Jos{\' e} Montellano-Ballesteros, Mika
Olsen and Christian Rubio-Montiel | Achromatic number, achromatic index and diachromatic number of circulant
graphs and digraphs | 9 pages, 1 figure | null | null | null | math.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we determine the achromatic and diachromatic numbers of some
circulant graphs and digraphs each one with two lengths and give bounds for
other circulant graphs and digraphs with two lengths. In particular, for the
achromatic number we state that $\alpha(C_{16q^2+20q+7}(1,2))=8q+5$, and for
the diachromatic number we state that
$dac(\overrightarrow{C}_{32q^2+24q+5}(1,2))=8q+3$. In general, we give the
lower bounds $\alpha(C_{4q^2+aq+1}(1,a))\geq 4q+1$ and
$dac(\overrightarrow{C}_{8q^2+2(a+4)q+a+3}(1,a))\geq 4q+3$ when $a$ is a non
quadratic residue of $\mathbb{Z}_{4q+1}$ for graphs and $\mathbb{Z}_{4q+3}$ for
digraphs, and the equality is attained, in both cases, for $a=3$. Finally, we
determine the achromatic index for circulant graphs of $q^2+q+1$ vertices when
the projective cyclic plane of odd order $q$ exists.
| [
{
"version": "v1",
"created": "Fri, 20 Dec 2019 21:18:16 GMT"
}
] | 2019-12-24T00:00:00 | [
[
"Araujo-Pardo",
"Gabriela",
""
],
[
"Montellano-Ballesteros",
"Juan Jos{\\' e}",
""
],
[
"Olsen",
"Mika",
""
],
[
"Rubio-Montiel",
"Christian",
""
]
] | |
1505.06948 | Giovanni Manfredi | Giovanni Manfredi, Jean-Louis Rouet, Bruce Miller, Yui Shiozawa | Cosmology in One Dimension: Vlasov Dynamics | null | Phys. Rev. E 93, 042211 (2016) | 10.1103/PhysRevE.93.042211 | null | astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Numerical simulations of self-gravitating systems are generally based on
N-body codes, which solve the equations of motion of a large number of
interacting particles. This approach suffers from poor statistical sampling in
regions of low density. In contrast, Vlasov codes, by meshing the entire phase
space, can reach higher accuracy irrespective of the density. Here, we
performed one-dimensional Vlasov simulations of a long-standing cosmological
problem, namely the fractal properties of an expanding Einstein-de Sitter
universe in Newtonian gravity. The N-body results were confirmed for
high-density regions and extended to regions of low matter density, where the
N-body approach usually fails.
| [
{
"version": "v1",
"created": "Tue, 26 May 2015 13:49:59 GMT"
},
{
"version": "v2",
"created": "Mon, 29 Feb 2016 13:35:09 GMT"
}
] | 2016-04-27T00:00:00 | [
[
"Manfredi",
"Giovanni",
""
],
[
"Rouet",
"Jean-Louis",
""
],
[
"Miller",
"Bruce",
""
],
[
"Shiozawa",
"Yui",
""
]
] | |
2305.14218 | Aditi Khandelwal | Kriti Aggarwal, Aditi Khandelwal, Kumar Tanmay, Owais Mohammed Khan,
Qiang Liu, Monojit Choudhury, Hardik Hansrajbhai Chauhan, Subhojit Som,
Vishrav Chaudhary, Saurabh Tiwary | DUBLIN -- Document Understanding By Language-Image Network | null | null | null | null | cs.CV cs.AI | http://creativecommons.org/licenses/by-sa/4.0/ | Visual document understanding is a complex task that involves analyzing both
the text and the visual elements in document images. Existing models often rely
on manual feature engineering or domain-specific pipelines, which limit their
generalization ability across different document types and languages. In this
paper, we propose DUBLIN, which is pretrained on web pages using three novel
objectives: Masked Document Text Generation Task, Bounding Box Task, and
Rendered Question Answering Task, that leverage both the spatial and semantic
information in the document images. Our model achieves competitive or
state-of-the-art results on several benchmarks, such as Web-Based Structural
Reading Comprehension, Document Visual Question Answering, Key Information
Extraction, Diagram Understanding, and Table Question Answering. In particular,
we show that DUBLIN is the first pixel-based model to achieve an EM of 77.75
and F1 of 84.25 on the WebSRC dataset. We also show that our model outperforms
the current pixel-based SOTA models on DocVQA, InfographicsVQA, OCR-VQA and
AI2D datasets by 4.6%, 6.5%, 2.6% and 21%, respectively. We also achieve
competitive performance on RVL-CDIP document classification. Moreover, we
create new baselines for text-based datasets by rendering them as document
images to promote research in this direction.
| [
{
"version": "v1",
"created": "Tue, 23 May 2023 16:34:09 GMT"
},
{
"version": "v2",
"created": "Wed, 24 May 2023 07:03:56 GMT"
},
{
"version": "v3",
"created": "Sat, 17 Jun 2023 05:53:08 GMT"
},
{
"version": "v4",
"created": "Fri, 27 Oct 2023 15:08:31 GMT"
}
] | 2023-10-30T00:00:00 | [
[
"Aggarwal",
"Kriti",
""
],
[
"Khandelwal",
"Aditi",
""
],
[
"Tanmay",
"Kumar",
""
],
[
"Khan",
"Owais Mohammed",
""
],
[
"Liu",
"Qiang",
""
],
[
"Choudhury",
"Monojit",
""
],
[
"Chauhan",
"Hardik Hansrajbhai",
""
],
[
"Som",
"Subhojit",
""
],
[
"Chaudhary",
"Vishrav",
""
],
[
"Tiwary",
"Saurabh",
""
]
] | |
2112.11683 | Shanmukha Shetty Mr | Shanmukha Shetty, Sauvik Banerjee, Siddharth Tallur, Yogesh M. Desai | Effectiveness of Multi-Physics Numerical Model in Simulating Accelerated
Corrosion with Spatial and Temporal Non Uniformity | null | null | null | null | physics.app-ph | http://creativecommons.org/licenses/by/4.0/ | This study is motivated by the need to develop an efficient numerical model
to simulate non-uniform interfacial degradation of reinforcing steel in
concrete in an accelerated corrosion setup. In this study, a multi physics
finite element (FE) model is presented that takes into consideration the
spatial and temporal non uniformity of corrosion induced degradation in rebar,
and eliminates the assumption of uniform mass loss and its linear variation
with time as per available literature that uses classical approach of Faraday's
law. The model is validated experimentally with accelerated corrosion setup
designed to induce partial corrosion. Further, the possibility of extending
this model to monitor natural corrosion is discussed with required
modifications. Unlike previous studies, pore saturation (PS) is continuously
monitored and its existing experimental correlations with electrolyte
conductivity and oxygen diffusivity in the vicinity of partial corrosion are
adopted so that the model can be extended to simulate natural corrosion. These
evaluations can be made completely nondestructive and in real time to capture
the influence of local environment. The proposed methodology also captures the
effect of differential aeration pertaining to local exposure. Therefore, the
challenges in incorporating influence of local environment by the use of
alternative parameters such as relative humidity from real climate change
predictions are eliminated. It is shown that the multi-physics model is
effective and convenient to simulate the non-uniform time dependent mass loss
with acceptable accuracy and that its capability can be extended to monitor
natural non uniform corrosion on a space time frame.
| [
{
"version": "v1",
"created": "Wed, 22 Dec 2021 06:17:30 GMT"
}
] | 2021-12-23T00:00:00 | [
[
"Shetty",
"Shanmukha",
""
],
[
"Banerjee",
"Sauvik",
""
],
[
"Tallur",
"Siddharth",
""
],
[
"Desai",
"Yogesh M.",
""
]
] | |
1805.05541 | Zhi-Hai Liu | Zhi-Hai Liu, Rui Li, Xuedong Hu, and J. Q. You | Spin-orbit coupling and electric-dipole spin resonance in a nanowire
double quantum dot | 16 pages, 6 figures | Scientific Reports 8, 2302 (2018) | 10.1038/s41598-018-20706-5 | null | cond-mat.mes-hall quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the electric-dipole transitions for a single electron in a double
quantum dot located in a semiconductor nanowire. Enabled by spin-orbit coupling
(SOC), electric-dipole spin resonance (EDSR) for such an electron can be
generated via two mechanisms: the SOC-induced intradot pseudospin states mixing
and the interdot spin-flipped tunneling. The EDSR frequency and strength are
determined by these mechanisms together. For both mechanisms the
electric-dipole transition rates are strongly dependent on the external
magnetic field. Their competition can be revealed by increasing the magnetic
field and/or the interdot distance for the double dot. To clarify whether the
strong SOC significantly impact the electron state coherence, we also calculate
relaxations from excited levels via phonon emission. We show that spin-flip
relaxations can be effectively suppressed by the phonon bottleneck effect even
at relatively low magnetic fields because of the very large $g$-factor of
strong SOC materials such as InSb.
| [
{
"version": "v1",
"created": "Tue, 15 May 2018 03:03:09 GMT"
}
] | 2018-05-16T00:00:00 | [
[
"Liu",
"Zhi-Hai",
""
],
[
"Li",
"Rui",
""
],
[
"Hu",
"Xuedong",
""
],
[
"You",
"J. Q.",
""
]
] | |
1210.8225 | Rai Yuen | Donald B. Melrose and Rai Yuen | Pulsar electrodynamics revisited | 4 pages | null | 10.1017/S1743921312023873 | null | astro-ph.SR astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inductive electric field is unjustifiably neglected in most models for
pulsar electrodynamics; it cannot be screened by the magnetospheric plasma, and
it is not small in comparison with the corotation electric field. The
perpendicular component of the inductive electric field implies a drift motion
that is inconsistent with corotation at any angular velocity. Some implications
of the inductive electric field and the associated drift motion are discussed.
| [
{
"version": "v1",
"created": "Wed, 31 Oct 2012 04:01:01 GMT"
}
] | 2015-06-11T00:00:00 | [
[
"Melrose",
"Donald B.",
""
],
[
"Yuen",
"Rai",
""
]
] | |
1312.4325 | Konstantin Bliokh | Konstantin Y. Bliokh, Yuri S. Kivshar, and Franco Nori | Magnetoelectric Effects in Local Light-Matter Interactions | 6 pages, 1 figure, 1 table, to appear in Phys. Rev. Lett | Phys. Rev. Lett. 113, 033601 (2014) | 10.1103/PhysRevLett.113.033601 | null | physics.optics cond-mat.other quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the generic interaction of a monochromatic electromagnetic field
with bi-isotropic nanoparticles. Such an interaction is described by
dipole-coupling terms associated with the breaking of dual, P- and
T-symmetries, including the chirality and the nonreciprocal magnetoelectric
effect. We calculate absorption rates, radiation forces, and radiation torques
for the nanoparticles and introduce novel characteristics of the field
quantifying the transfer of energy, momentum, and angular-momentum in these
interactions. In particular, we put forward the concept of 'magnetoelectric
energy density', quantifying the local PT-symmetry of the field. Akin to the
'super-chiral' light suggested recently for sensitive local probing of
molecular chirality [Phys. Rev. Lett. 104, 163901 (2010); Science 332, 333
(2011)], here we describe a complex field for sensitive probing of the
nonreciprocal magnetoelectric effect in nanoparticles or molecules.
| [
{
"version": "v1",
"created": "Mon, 16 Dec 2013 11:54:07 GMT"
},
{
"version": "v2",
"created": "Mon, 2 Jun 2014 16:05:27 GMT"
}
] | 2014-07-23T00:00:00 | [
[
"Bliokh",
"Konstantin Y.",
""
],
[
"Kivshar",
"Yuri S.",
""
],
[
"Nori",
"Franco",
""
]
] | |
0904.2197 | Lukasz Fidkowski | Lukasz Fidkowski and Alexei Kitaev | The effects of interactions on the topological classification of free
fermion systems | 9 pages, 5 figures. v3: reference added, bibliography cleaned up | null | 10.1103/PhysRevB.81.134509 | null | cond-mat.str-el | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe in detail a counterexample to the topological classification of
free fermion systems. We deal with a one dimensional chain of Majorana fermions
with an unusual T symmetry. The topological invariant for the free fermion
classification is an integer, but with the introduction of interactions it
becomes well defined only modulo 8. We illustrate this in the microscopic model
of the Majorana chain by constructing an explicit path between two distinct
free phases whose topological invariants are equal modulo 8, along which the
system remains gapped. The path goes through a strongly interacting region. We
also find the field theory interpretation of this phenomenon. There is a second
order phase transition between the two phases in the free theory which can be
avoided by going through the strongly interacting region. We show that this
transition is in the 2D Ising universality class, where a first order phase
transition line, terminating at a second order transition, can be avoided by
going through the analogue of a high temperature paramagnetic phase. In fact,
we construct the full phase diagram of the system as a function of the thermal
operator (i.e. the mass term that tunes between the two phases in the free
theory) and two quartic operators, obtaining a first order Peierls transition
region, a second order transition region, and a region with no transition.
| [
{
"version": "v1",
"created": "Tue, 14 Apr 2009 20:20:26 GMT"
},
{
"version": "v2",
"created": "Wed, 22 Apr 2009 19:10:24 GMT"
},
{
"version": "v3",
"created": "Wed, 29 Apr 2009 23:53:30 GMT"
}
] | 2013-05-29T00:00:00 | [
[
"Fidkowski",
"Lukasz",
""
],
[
"Kitaev",
"Alexei",
""
]
] | |
astro-ph/0304385 | X. Hernandez | Roberto A. Sussman (1) and Xavier Hernandez (2) ((1) Instituto de
Ciencias Nucleares, (2) Instituto de Astronomia, Universidad Nacional
Autonoma de Mexico, UNAM) | On the newtonian limit and cut--off scales of isothermal dark matter
halos with cosmological constant | 13 pages, 19 figures, Accepted in MNRAS, includes minor corrections
suggested by the referee | Mon.Not.Roy.Astron.Soc. 345 (2003) 871 | 10.1046/j.1365-8711.2003.07010.x | null | astro-ph gr-qc | null | We examine isothermal dark matter halos in hydrostatic equilibrium with a
cosmological constant Lambda =Omega_\Lambda rho_{crit}c^2, where
Omega_\Lambda=0.7, and rho_{crit} is the present value of the critical density
with h=0.65. The Newtonian limit of General Relativity yields equilibrium
equations that are different from those arising by merely coupling an
``isothermal sphere'' to the Lambda-field within a Newtonian framework. The
conditions for the existence and stability of circular geodesic orbits show the
existence of (I) an ``isothermal region'' (0<r<r_2), circular orbits are stable
and all variables behave almost identically to those of an isothermal sphere;
(II) an ``asymptotic region'' (r>r_1) dominated by the Lambda-field, where the
Newtonian potential oscillates and circular orbits exist in disconnected
patches of the domain of r; (III) a ``transition region'' (r_2<r<r_1), circular
orbits exist but are unstable. We also find that no stable configuration exists
with central density, rho_c, smaller than 2 Lambda, hence any galactic haloes
which virialized at $z< 30$ in must have rho_c >0.008 M_\odot {pc}^3, in
agreement with rotation curve studies of dwarf galaxies. Since r_2 marks the
largest radius of a stable circular orbit, it provides a ``cut off'' radius.
For current estimates of rho_c and velocity dispersion of galactic structures,
this is around five times larger than the virialization radius. The effects of
the Lambda$--field can hence be ignored in structure formation models, but
could be significant in the dynamics of superclusters in the linear regime or
of gravitational clustering at large scales.
| [
{
"version": "v1",
"created": "Tue, 22 Apr 2003 17:36:03 GMT"
},
{
"version": "v2",
"created": "Mon, 14 Jul 2003 18:19:04 GMT"
}
] | 2009-11-07T00:00:00 | [
[
"Sussman",
"Roberto A.",
""
],
[
"Hernandez",
"Xavier",
""
]
] | |
2105.10152 | Harsh Kohli Mr. | Harsh Kohli | Training Mixed-Objective Pointing Decoders for Block-Level Optimization
in Search Recommendation | 4 pages. Accepted at the 43rd International ACM SIGIR Conference on
Research and Development in Information Retrieval | null | 10.1145/3397271.3401236 | null | cs.IR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Related or ideal follow-up suggestions to a web query in search engines are
often optimized based on several different parameters -- relevance to the
original query, diversity, click probability etc. One or many rankers may be
trained to score each suggestion from a candidate pool based on these factors.
These scorers are usually pairwise classification tasks where each training
example consists of a user query and a single suggestion from the list of
candidates. We propose an architecture that takes all candidate suggestions
associated with a given query and outputs a suggestion block. We discuss the
benefits of such an architecture over traditional approaches and experiment
with further enforcing each individual metric through mixed-objective training.
| [
{
"version": "v1",
"created": "Fri, 21 May 2021 06:34:19 GMT"
}
] | 2021-05-24T00:00:00 | [
[
"Kohli",
"Harsh",
""
]
] | |
hep-th/9901054 | Antonio Edson Goncalves | A.A. Bytsenko, A.E. Goncalves, M. Simoes and F.L. Williams | Anomalies and Analytic Torsion on Hyperbolic Manifolds | AMSTeX file, 20 pages | J.Math.Phys. 40 (1999) 4119-4133 | 10.1063/1.532949 | Preprint UEL/DF-981204 | hep-th | null | The global additive and multiplicative properties of the Laplacian on j-forms
and related zeta functions are analyzed. The explicit form of zeta functions on
a product of closed oriented hyperbolic manifolds \Gamma\backslash{\Bbb H}^d
and of the multiplicative anomaly are derived. We also calculate in an explicit
form the analytic torsion associated with a connected sum of such manifolds.
| [
{
"version": "v1",
"created": "Wed, 13 Jan 1999 17:09:11 GMT"
}
] | 2015-06-26T00:00:00 | [
[
"Bytsenko",
"A. A.",
""
],
[
"Goncalves",
"A. E.",
""
],
[
"Simoes",
"M.",
""
],
[
"Williams",
"F. L.",
""
]
] | |
2106.14771 | Dominik Marek Loroch | Jonas Ney, Dominik Loroch, Vladimir Rybalkin, Nico Weber, Jens
Kr\"uger, Norbert Wehn | HALF: Holistic Auto Machine Learning for FPGAs | 2021 31st International Conference on Field-Programmable Logic and
Applications (FPL). IEEE, 2021 | null | 10.1109/FPL53798.2021.00069 | null | cs.AR cs.LG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Deep Neural Networks (DNNs) are capable of solving complex problems in
domains related to embedded systems, such as image and natural language
processing. To efficiently implement DNNs on a specific FPGA platform for a
given cost criterion, e.g. energy efficiency, an enormous amount of design
parameters has to be considered from the topology down to the final hardware
implementation. Interdependencies between the different design layers have to
be taken into account and explored efficiently, making it hardly possible to
find optimized solutions manually. An automatic, holistic design approach can
improve the quality of DNN implementations on FPGA significantly. To this end,
we present a cross-layer design space exploration methodology. It comprises
optimizations starting from a hardware-aware topology search for DNNs down to
the final optimized implementation for a given FPGA platform. The methodology
is implemented in our Holistic Auto machine Learning for FPGAs (HALF)
framework, which combines an evolutionary search algorithm, various
optimization steps and a library of parametrizable hardware DNN modules. HALF
automates both the exploration process and the implementation of optimized
solutions on a target FPGA platform for various applications. We demonstrate
the performance of HALF on a medical use case for arrhythmia detection for
three different design goals, i.e. low-energy, low-power and high-throughput
respectively. Our FPGA implementation outperforms a TensorRT optimized model on
an Nvidia Jetson platform in both throughput and energy consumption.
| [
{
"version": "v1",
"created": "Mon, 28 Jun 2021 14:45:47 GMT"
},
{
"version": "v2",
"created": "Wed, 20 Oct 2021 13:22:54 GMT"
}
] | 2021-10-22T00:00:00 | [
[
"Ney",
"Jonas",
""
],
[
"Loroch",
"Dominik",
""
],
[
"Rybalkin",
"Vladimir",
""
],
[
"Weber",
"Nico",
""
],
[
"Krüger",
"Jens",
""
],
[
"Wehn",
"Norbert",
""
]
] | |
1212.0220 | Xin-She Yang | Xin-She Yang | Metaheuristic Optimization: Algorithm Analysis and Open Problems | 14 pages 2 figures. arXiv admin note: substantial text overlap with
arXiv:1208.0527 | Lecture Notes in Computer Sciences, Vol. 6630 (2011) pp. 21-32 | null | null | math.OC cs.NE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Metaheuristic algorithms are becoming an important part of modern
optimization. A wide range of metaheuristic algorithms have emerged over the
last two decades, and many metaheuristics such as particle swarm optimization
are becoming increasingly popular. Despite their popularity, mathematical
analysis of these algorithms lacks behind. Convergence analysis still remains
unsolved for the majority of metaheuristic algorithms, while efficiency
analysis is equally challenging. In this paper, we intend to provide an
overview of convergence and efficiency studies of metaheuristics, and try to
provide a framework for analyzing metaheuristics in terms of convergence and
efficiency. This can form a basis for analyzing other algorithms. We also
outline some open questions as further research topics.
| [
{
"version": "v1",
"created": "Sun, 2 Dec 2012 16:01:23 GMT"
}
] | 2012-12-04T00:00:00 | [
[
"Yang",
"Xin-She",
""
]
] | |
2302.04386 | Adrienne Kline | Adrienne Kline and Joon Lee | Machine Learning Capability: A standardized metric using case difficulty
with applications to individualized deployment of supervised machine learning | null | null | null | null | cs.LG | http://creativecommons.org/licenses/by/4.0/ | Model evaluation is a critical component in supervised machine learning
classification analyses. Traditional metrics do not currently incorporate case
difficulty. This renders the classification results unbenchmarked for
generalization. Item Response Theory (IRT) and Computer Adaptive Testing (CAT)
with machine learning can benchmark datasets independent of the
end-classification results. This provides high levels of case-level information
regarding evaluation utility. To showcase, two datasets were used: 1)
health-related and 2) physical science. For the health dataset a two-parameter
IRT model, and for the physical science dataset a polytonomous IRT model, was
used to analyze predictive features and place each case on a difficulty
continuum. A CAT approach was used to ascertain the algorithms' performance and
applicability to new data. This method provides an efficient way to benchmark
data, using only a fraction of the dataset (less than 1%) and 22-60x more
computationally efficient than traditional metrics. This novel metric, termed
Machine Learning Capability (MLC) has additional benefits as it is unbiased to
outcome classification and a standardized way to make model comparisons within
and across datasets. MLC provides a metric on the limitation of supervised
machine learning algorithms. In situations where the algorithm falls short,
other input(s) are required for decision-making.
| [
{
"version": "v1",
"created": "Thu, 9 Feb 2023 00:38:42 GMT"
}
] | 2023-02-10T00:00:00 | [
[
"Kline",
"Adrienne",
""
],
[
"Lee",
"Joon",
""
]
] | |
2308.11084 | Xulong Zhang | Yimin Deng, Huaizhen Tang, Xulong Zhang, Jianzong Wang, Ning Cheng,
Jing Xiao | PMVC: Data Augmentation-Based Prosody Modeling for Expressive Voice
Conversion | Accepted by the 31st ACM International Conference on Multimedia
(MM2023) | null | 10.1145/3581783.3613800 | null | cs.SD eess.AS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Voice conversion as the style transfer task applied to speech, refers to
converting one person's speech into a new speech that sounds like another
person's. Up to now, there has been a lot of research devoted to better
implementation of VC tasks. However, a good voice conversion model should not
only match the timbre information of the target speaker, but also expressive
information such as prosody, pace, pause, etc. In this context, prosody
modeling is crucial for achieving expressive voice conversion that sounds
natural and convincing. Unfortunately, prosody modeling is important but
challenging, especially without text transcriptions. In this paper, we firstly
propose a novel voice conversion framework named 'PMVC', which effectively
separates and models the content, timbre, and prosodic information from the
speech without text transcriptions. Specially, we introduce a new speech
augmentation algorithm for robust prosody extraction. And building upon this,
mask and predict mechanism is applied in the disentanglement of prosody and
content information. The experimental results on the AIShell-3 corpus supports
our improvement of naturalness and similarity of converted speech.
| [
{
"version": "v1",
"created": "Mon, 21 Aug 2023 23:37:45 GMT"
}
] | 2023-08-23T00:00:00 | [
[
"Deng",
"Yimin",
""
],
[
"Tang",
"Huaizhen",
""
],
[
"Zhang",
"Xulong",
""
],
[
"Wang",
"Jianzong",
""
],
[
"Cheng",
"Ning",
""
],
[
"Xiao",
"Jing",
""
]
] | |
1802.02592 | John Mackereth | J. Ted Mackereth and Jo Bovy | Fast estimation of orbital parameters in Milky-Way-like potentials | 11 Pages, 6 Figures, Accepted for publication in PASP, Full code and
extra material available at https://github.com/jmackereth/orbit-estimation ,
Supplementary data table is available (temporarily) at
http://www.astro.ljmu.ac.uk/~astjmack/gaia_orbits/gaiarvs_orbitparams_units.csv | null | 10.1088/1538-3873/aadcdd | null | astro-ph.GA astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Orbital parameters, such as eccentricity and maximum vertical excursion, of
stars in the Milky Way are an important tool for understanding its dynamics and
evolution, but calculation of such parameters usually relies on
computationally-expensive numerical orbit integration. We present and test a
fast method for estimating these parameters using an application of the
St\"ackel fudge, used previously for the estimation of action-angle variables.
We show that the method is highly accurate, to a level of $<1\%$ in
eccentricity, over a large range of relevant orbits and in different Milky
Way-like potentials, and demonstrate its validity by estimating the
eccentricity distribution of the RAVE-TGAS data set and comparing it to that
from orbit integration. Using the method, the orbital characteristics of the
$\sim 7$ million $\textit{Gaia}$ DR2 stars with radial velocity measurements
are computed with Monte Carlo sampled errors in $\sim 116$ hours of
parallelised cpu time, at a speed that we estimate to be $\sim 3$ to $4$ orders
of magnitude faster than using numerical orbit integration. We demonstrate
using this catalogue that $\textit{Gaia}$ DR2 samples a large range of orbits
in the solar vicinity, down to those with $r_\mathrm{peri} \lesssim 2.5$ kpc,
and out to $r_\mathrm{ap} \gtrsim 13$ kpc. We also show that many of the
features present in orbital parameter space have a low mean $z_\mathrm{max}$,
suggesting that they likely result from disk dynamical effects.
| [
{
"version": "v1",
"created": "Wed, 7 Feb 2018 19:01:42 GMT"
},
{
"version": "v2",
"created": "Wed, 29 Aug 2018 11:39:32 GMT"
}
] | 2018-10-17T00:00:00 | [
[
"Mackereth",
"J. Ted",
""
],
[
"Bovy",
"Jo",
""
]
] | |
1305.3664 | Bogdan Mielnik Dr. | Bogdan Mielnik | Quantum Operations: technical or fundamental challenge? | 30 pages, 8 figures | null | 10.1088/1751-8113/46/38/385301 | null | quant-ph math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A class of unitary operations generated by idealized, semiclassical fields is
studied. The operations implemented by sharp potential kicks are revisited and
the possibility of performing them by softly varying external fields is
examined.
The possibility of using the ion traps as 'operation factories' transforming
quantum states is discussed. The non-perturbative algorithms indicate that the
results of abstract $\delta$-pulses of oscillator potentials can become real.
Some of them, if empirically achieved, could be essential to examine certain
atypical quantum ideas. In particular, simple dynamical manipulations might
contribute to the Aharonov-Bohm criticism of the time-energy uncertainty
principle, some other, to verify the existence of fundamental precision limits
of the position measurements or the reality of `non-commutative geometries'.
| [
{
"version": "v1",
"created": "Thu, 16 May 2013 00:49:15 GMT"
},
{
"version": "v2",
"created": "Sun, 19 May 2013 21:05:19 GMT"
},
{
"version": "v3",
"created": "Mon, 2 Dec 2013 19:54:32 GMT"
}
] | 2015-06-15T00:00:00 | [
[
"Mielnik",
"Bogdan",
""
]
] | |
2311.17572 | J John Soundar Jerome | Narendra Dev, {J. John Soundar Jerome}, H\'el\`ene Scolan, and
Jean-Philippe Matas | Liquid inertia versus bubble cloud buoyancy in circular plunging jet
experiments | As of 16th of November 2023, it is accepted for publication in JFM | J. Fluid Mech. 978 (2024) A23 | 10.1017/jfm.2023.1019 | null | physics.flu-dyn | http://creativecommons.org/licenses/by/4.0/ | When a liquid jet plunges into a pool, it can generate a bubble-laden jet
flow underneath the surface. This common and simple phenomenon is investigated
experimentally for circular jets to illustrate and quantify the role played by
the net gas/liquid void fraction on the maximum bubble penetration depth. It is
first shown that an increase in either the impact diameter or the jet fall
height to diameter ratio at constant impact momentum leads to a reduction in
the bubble cloud size. By systematically measuring the local void fraction
using optical probes in the biphasic jet, it is then demonstrated that this
effect is a direct consequence of the increase in the air content within the
cloud. A simple momentum balance model, including only inertia and the buoyancy
force, is shown to predict the bubble cloud depth without any fitting
parameters. Finally, a Froude number based on the bubble terminal velocity, the
cloud depth, and also the net void fraction is introduced to propose a simple
criterion for the threshold between the inertia-dominated and
buoyancy-dominated regimes.
| [
{
"version": "v1",
"created": "Wed, 29 Nov 2023 12:09:01 GMT"
}
] | 2024-11-27T00:00:00 | [
[
"Dev",
"Narendra",
""
],
[
"Jerome}",
"{J. John Soundar",
""
],
[
"Scolan",
"Hélène",
""
],
[
"Matas",
"Jean-Philippe",
""
]
] | |
1011.3527 | Yuri B. Suris | Vsevolod E. Adler, Alexander I. Bobenko, Yuri B. Suris | Classification of integrable discrete equations of octahedron type | 53 pp., pdfLaTeX | Internat. Math. Research Notes, 2012, 2012, 1822-1889 | null | null | nlin.SI math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the consistency approach to classify discrete integrable 3D equations
of the octahedron type. They are naturally treated on the root lattice $Q(A_3)$
and are consistent on the multidimensional lattice $Q(A_N)$. Our list includes
the most prominent representatives of this class, the discrete KP equation and
its Schwarzian (multi-ratio) version, as well as three further equations. The
combinatorics and geometry of the octahedron type equations are explained. In
particular, the consistency on the 4-dimensional Delaunay cells has its origin
in the classical Desargues theorem of projective geometry. The main technical
tool used for the classification is the so called tripodal form of the
octahedron type equations.
| [
{
"version": "v1",
"created": "Mon, 15 Nov 2010 21:19:27 GMT"
}
] | 2012-08-28T00:00:00 | [
[
"Adler",
"Vsevolod E.",
""
],
[
"Bobenko",
"Alexander I.",
""
],
[
"Suris",
"Yuri B.",
""
]
] | |
0904.2650 | Raphael Tumanyan V. | Rafael Tumanyan | Dynamics and Cooling of Modulated Bunches in Bend | null | null | null | null | physics.acc-ph physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The influence of the space charge fields on the dynamics of the particles of
the bunch, which is moved in a bending magnet is calculated. It is shown, that
such influence of the Coulomb force on the energy of the particles of a
modulated beam causes in the decreasing of the bunch energy spread during the
compression due to energy deviation along the compressed bunch, i.e. bunch
cooling. The necessary conditions of the maximal cooling are found. The
attainable ordering of the bunch is investigated.
| [
{
"version": "v1",
"created": "Fri, 17 Apr 2009 08:29:28 GMT"
}
] | 2009-04-20T00:00:00 | [
[
"Tumanyan",
"Rafael",
""
]
] | |
1607.02552 | Pranav Sakulkar | Pranav Sakulkar and Bhaskar Krishnamachari | Online Learning Schemes for Power Allocation in Energy Harvesting
Communications | This paper is under submission in the IEEE Transaction on Information
Theory | null | null | null | cs.LG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the problem of power allocation over a time-varying channel with
unknown distribution in energy harvesting communication systems. In this
problem, the transmitter has to choose the transmit power based on the amount
of stored energy in its battery with the goal of maximizing the average rate
obtained over time. We model this problem as a Markov decision process (MDP)
with the transmitter as the agent, the battery status as the state, the
transmit power as the action and the rate obtained as the reward. The average
reward maximization problem over the MDP can be solved by a linear program (LP)
that uses the transition probabilities for the state-action pairs and their
reward values to choose a power allocation policy. Since the rewards associated
the state-action pairs are unknown, we propose two online learning algorithms:
UCLP and Epoch-UCLP that learn these rewards and adapt their policies along the
way. The UCLP algorithm solves the LP at each step to decide its current policy
using the upper confidence bounds on the rewards, while the Epoch-UCLP
algorithm divides the time into epochs, solves the LP only at the beginning of
the epochs and follows the obtained policy in that epoch. We prove that the
reward losses or regrets incurred by both these algorithms are upper bounded by
constants. Epoch-UCLP incurs a higher regret compared to UCLP, but reduces the
computational requirements substantially. We also show that the presented
algorithms work for online learning in cost minimization problems like the
packet scheduling with power-delay tradeoff with minor changes.
| [
{
"version": "v1",
"created": "Fri, 8 Jul 2016 23:42:22 GMT"
},
{
"version": "v2",
"created": "Fri, 26 Aug 2016 01:06:24 GMT"
}
] | 2016-08-29T00:00:00 | [
[
"Sakulkar",
"Pranav",
""
],
[
"Krishnamachari",
"Bhaskar",
""
]
] | |
1612.08247 | Yunyan Yang | Xiaomeng Li, Yunyan Yang | Extremal functions for singular Trudinger-Moser inequalities in the
entire Euclidean space | 35 pages | null | null | null | math.AP | http://creativecommons.org/licenses/by-nc-sa/4.0/ | In a previous work (Int. Math. Res. Notices 13 (2010) 2394-2426),
Adimurthi-Yang proved a singular Trudinger-Moser inequality in the entire
Euclidean space $\mathbb{R}^N$ $(N\geq 2)$. Precisely, if $0\leq \beta<1$ and
$0<\gamma\leq1-\beta$, then there holds for any $\tau>0$, $$\sup_{u\in
W^{1,N}(\mathbb{R}^N),\,\int_{\mathbb{R}^N}(|\nabla u|^N+\tau |u|^N)dx\leq
1}\int_{\mathbb{R}^N}\frac{1}{|x|^{N\beta}}\left(e^{\alpha_N\gamma|u|^{\frac{N}{N-1}}}-\sum_{k=0}^{N-2}\frac{\alpha_N^k\gamma^k|u|^{\frac{kN}{N-1}}}
{k!}\right)dx<\infty,$$ where $\alpha_N=N\omega_{N-1}^{1/(N-1)}$ and
$\omega_{N-1}$ is the area of the unit sphere in $\mathbb{R}^N$. The above
inequality is sharp in the sense that if $\gamma>1-\beta$, all integrals are
still finite but the supremum is infinity. In this paper, we concern extremal
functions for these singular inequalities. The regular case $\beta=0$ has been
considered by Li-Ruf (Indiana Univ. Math. J. 57 (2008) 451-480) and Ishiwata
(Math. Ann. 351 (2011) 781-804). We shall investigate the singular case
$0<\beta<1$ and prove that for all $\tau>0$, $0<\beta<1$ and $0<\gamma\leq
1-\beta$, extremal functions for the above inequalities exist. The proof is
based on blow-up analysis.
| [
{
"version": "v1",
"created": "Sun, 25 Dec 2016 08:11:04 GMT"
}
] | 2016-12-28T00:00:00 | [
[
"Li",
"Xiaomeng",
""
],
[
"Yang",
"Yunyan",
""
]
] | |
2312.03906 | Devin Smedira | David Gamarnik and Devin Smedira | Computing the Volume of a Restricted Independent Set Polytope
Deterministically | null | null | null | null | cs.DS cs.DM math.CO math.PR | http://creativecommons.org/licenses/by/4.0/ | We construct a quasi-polynomial time deterministic approximation algorithm
for computing the volume of an independent set polytope with restrictions.
Randomized polynomial time approximation algorithms for computing the volume of
a convex body have been known now for several decades, but the corresponding
deterministic counterparts are not available, and our algorithm is the first of
this kind. The class of polytopes for which our algorithm applies arises as
linear programming relaxation of the independent set problem with the
additional restriction that each variable takes value in the interval
$[0,1-\alpha]$ for some $\alpha<1/2$. (We note that the $\alpha\ge 1/2$ case is
trivial).
We use the correlation decay method for this problem applied to its
appropriate and natural discretization. The method works provided $\alpha>
1/2-O(1/\Delta^2)$, where $\Delta$ is the maximum degree of the graph. When
$\Delta=3$ (the sparsest non-trivial case), our method works provided
$0.488<\alpha<0.5$. Interestingly, the interpolation method, which is based on
analyzing complex roots of the associated partition functions, fails even in
the trivial case when the underlying graph is a singleton.
| [
{
"version": "v1",
"created": "Wed, 6 Dec 2023 20:59:27 GMT"
}
] | 2023-12-08T00:00:00 | [
[
"Gamarnik",
"David",
""
],
[
"Smedira",
"Devin",
""
]
] | |
1402.3761 | Stefano Longhi | Stefano Longhi | Bound states in the continuum in PT-symmetric optical lattices | 2 figures, to appear in Opt. Lett | Optics Letters 39, 1697-1700 (2014) | 10.1364/OL.39.001697 | null | quant-ph physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bound states in the continuum (BIC), i.e. normalizable modes with an energy
embedded in the continuous spectrum of scattered states, are shown to exist in
certain optical waveguide lattices with $\mathcal{PT}$-symmetric defects. Two
distinct types of BIC modes are found: BIC states that exist in the broken
$\mathcal{PT}$ phase, corresponding to exponentially-localized modes with
either exponentially damped or amplified optical power; and BIC modes with
sub-exponential spatial localization that can exist in the unbroken
$\mathcal{PT}$ phase as well. The two types of BIC modes at the $\mathcal{PT}$
symmetry breaking point behave rather differently: while in the former case
spatial localization is lost and the defect coherently radiates outgoing waves
with an optical power that linearly increases with the propagation distance, in
the latter case localization is maintained and the optical power increase is
quadratic.
| [
{
"version": "v1",
"created": "Sun, 16 Feb 2014 06:42:53 GMT"
}
] | 2014-03-19T00:00:00 | [
[
"Longhi",
"Stefano",
""
]
] | |
1212.1754 | Frans Schalekamp | Frans Schalekamp, Rene Sitters, Suzanne van der Ster, Leen Stougie,
Victor Verdugo and Anke van Zuylen | Split Scheduling with Uniform Setup Times | null | null | null | null | cs.DS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a scheduling problem in which jobs may be split into parts, where
the parts of a split job may be processed simultaneously on more than one
machine. Each part of a job requires a setup time, however, on the machine
where the job part is processed. During setup a machine cannot process or set
up any other job. We concentrate on the basic case in which setup times are
job-, machine-, and sequence-independent. Problems of this kind were
encountered when modelling practical problems in planning disaster relief
operations. Our main algorithmic result is a polynomial-time algorithm for
minimising total completion time on two parallel identical machines. We argue
why the same problem with three machines is not an easy extension of the
two-machine case, leaving the complexity of this case as a tantalising open
problem. We give a constant-factor approximation algorithm for the general case
with any number of machines and a polynomial-time approximation scheme for a
fixed number of machines. For the version with objective minimising weighted
total completion time we prove NP-hardness. Finally, we conclude with an
overview of the state of the art for other split scheduling problems with job-,
machine-, and sequence-independent setup times.
| [
{
"version": "v1",
"created": "Sat, 8 Dec 2012 02:57:18 GMT"
}
] | 2012-12-11T00:00:00 | [
[
"Schalekamp",
"Frans",
""
],
[
"Sitters",
"Rene",
""
],
[
"van der Ster",
"Suzanne",
""
],
[
"Stougie",
"Leen",
""
],
[
"Verdugo",
"Victor",
""
],
[
"van Zuylen",
"Anke",
""
]
] | |
1311.3024 | Surajit Chattopadhyay | Surajit Chattopadhyay | A Study on Ricci Dark Energy in Bulk-Brane Interaction | arXiv admin note: text overlap with arXiv:hep-th/0609104,
arXiv:0908.1214, arXiv:hep-th/0511301 by other authors | ISRN High Energy Physics, vol. 2013, Article ID 895614, 2013 | 10.1155/2013/895614 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we have investigated the effects of the interaction between a
brane universe and the bulk in which it is embedded. Considering the effects of
the interaction between a brane universe and the bulk we have obtained the
equation of state for the interacting holographic Ricci dark energy density
$\rho_{\Lambda}=3c^2 (\dot{H}+2 H^2)$ in the flat universe. We have
investigated the impact of $c^2$ on the equation of state $\omega_{\Lambda}$.
Also, considering the power law for of the scale factor, we have observed that
non-trivial contributions of dark energy which differ from the standard matter
fields confined to the brane is increasing with the evolution of the universe.
| [
{
"version": "v1",
"created": "Wed, 13 Nov 2013 06:31:54 GMT"
}
] | 2013-11-14T00:00:00 | [
[
"Chattopadhyay",
"Surajit",
""
]
] | |
2301.06963 | Quentin Kriaa | Quentin Kriaa, Eliot Subra, Benjamin Favier, Michael Le Bars | Effects of particle size and background rotation on the settling of
particle clouds | null | Physical Review Fluids, 2022, 7 (12), pp.124302 | 10.1103/PhysRevFluids.7.124302 | null | physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We experimentally investigate the behaviour of instantaneous localised
releases of heavy particles falling as turbulent clouds in quiescent water,
both with and without background rotation. We present the results of 514
systematic experiments for no rotation and for three rotation rates $\Omega =
5,10,20$rpm, and for the size of particles in the range $5\mu m$ to $1mm$,
exploring four decades of the Rouse number $\mathcal{R} \in [6\times
10^{-4},4]$ which quantifies the inertia of particles. In the canonical
framework of turbulent thermals described by Morton \textit{et al.}, [Proc. R.
Soc. A: Math. Phys. Sci. \textbf{234}, 1 (1956)], we compare particle clouds
with salt-water thermals to highlight specificities due to the particulate
nature of the turbulence forcing. In the absence of rotation, particle clouds
initially behave as salty thermals with a modulation of their entrainment
capacity, which is optimally enhanced for a finite inertia $\mathcal{R}\simeq
0.3$ due to particulate effects. However this regime of turbulence is limited
in time due to the inertial decoupling between turbulent eddies and particles.
For the three values of $\Omega$ explored here, the particulate enhancement of
entrainment is inhibited. Moreover the cloud's expansion is interrupted when
the Coriolis force overcomes its inertia, forcing the cloud to transform into
vortical columnar flows which considerably increase the residence time of
particles.
| [
{
"version": "v1",
"created": "Tue, 17 Jan 2023 15:36:56 GMT"
}
] | 2023-01-18T00:00:00 | [
[
"Kriaa",
"Quentin",
""
],
[
"Subra",
"Eliot",
""
],
[
"Favier",
"Benjamin",
""
],
[
"Bars",
"Michael Le",
""
]
] | |
quant-ph/0207033 | Viktor V. Dodonov | Vladimir I Man'ko, Giuseppe Marmo, E C George Sudarshan and Francesco
Zaccaria | Interference and entanglement: an intrinsic approach | LaTex, 19 pages, to appear in J. Phys. A | null | 10.1088/0305-4470/35/33/311 | null | quant-ph | null | An addition rule of impure density operators, which provides a pure state
density operator, is formulated. Quantum interference including visibility
property is discussed in the context of the density operator formalism. A
measure of entanglement is then introduced as the norm of the matrix equal to
the difference between a bipartite density matrix and the tensor product of
partial traces. Entanglement for arbitrary quantum observables for multipartite
systems is discussed. Star-product kernels are used to map the formulation of
the addition rule of density operators onto the addition rule of symbols of the
operators. Entanglement and nonlocalization of the pure state projector and
allied operators are discussed. Tomographic and Weyl symbols (tomograms and
Wigner functions) are considered as examples. The squeezed-states and some
spin-states (two qubits) are studied to illustrate the formalism.
| [
{
"version": "v1",
"created": "Fri, 5 Jul 2002 20:18:14 GMT"
}
] | 2009-11-07T00:00:00 | [
[
"Man'ko",
"Vladimir I",
""
],
[
"Marmo",
"Giuseppe",
""
],
[
"Sudarshan",
"E C George",
""
],
[
"Zaccaria",
"Francesco",
""
]
] | |
2311.07618 | Roozbeh Yousefzadeh | Roozbeh Yousefzadeh and Xuenan Cao | Large Language Models' Understanding of Math: Source Criticism and
Extrapolation | null | null | null | null | cs.LG cs.AI cs.CL math.HO | http://creativecommons.org/licenses/by-sa/4.0/ | It has been suggested that large language models such as GPT-4 have acquired
some form of understanding beyond the correlations among the words in text
including some understanding of mathematics as well. Here, we perform a
critical inquiry into this claim by evaluating the mathematical understanding
of the GPT-4 model. Considering that GPT-4's training set is a secret, it is
not straightforward to evaluate whether the model's correct answers are based
on a mathematical understanding or based on replication of proofs that the
model has seen before. We specifically craft mathematical questions which their
formal proofs are not readily available on the web, proofs that are more likely
not seen by the GPT-4. We see that GPT-4 is unable to solve those problems
despite their simplicity. It is hard to find scientific evidence suggesting
that GPT-4 has acquired an understanding of even basic mathematical concepts. A
straightforward way to find failure modes of GPT-4 in theorem proving is to
craft questions where their formal proofs are not available on the web. Our
finding suggests that GPT-4's ability is to reproduce, rephrase, and polish the
mathematical proofs that it has seen before, and not in grasping mathematical
concepts. We also see that GPT-4's ability to prove mathematical theorems is
continuously expanding over time despite the claim that it is a fixed model. We
suggest that the task of proving mathematical theorems in formal language is
comparable to the methods used in search engines such as Google while
predicting the next word in a sentence may be a misguided approach, a recipe
that often leads to excessive extrapolation and eventual failures. Prompting
the GPT-4 over and over may benefit the GPT-4 and the OpenAI, but we question
whether it is valuable for machine learning or for theorem proving.
| [
{
"version": "v1",
"created": "Sun, 12 Nov 2023 07:52:32 GMT"
}
] | 2023-11-15T00:00:00 | [
[
"Yousefzadeh",
"Roozbeh",
""
],
[
"Cao",
"Xuenan",
""
]
] | |
cs/0610137 | Silvano Dal Zilio | Lucia Acciai (LIF), Michele Boreale, Silvano Dal Zilio (LIF) | A Concurrent Calculus with Atomic Transactions | 29 pages | null | null | null | cs.LO cs.DC | null | The Software Transactional Memory (STM) model is an original approach for
controlling concurrent accesses to ressources without the need for explicit
lock-based synchronization mechanisms. A key feature of STM is to provide a way
to group sequences of read and write actions inside atomic blocks, similar to
database transactions, whose whole effect should occur atomically. In this
paper, we investigate STM from a process algebra perspective and define an
extension of asynchronous CCS with atomic blocks of actions. Our goal is not
only to set a formal ground for reasoning on STM implementations but also to
understand how this model fits with other concurrency control mechanisms. We
also view this calculus as a test bed for extending process calculi with atomic
transactions. This is an interesting direction for investigation since, for the
most part, actual works that mix transactions with process calculi consider
compensating transactions, a model that lacks all the well-known ACID
properties. We show that the addition of atomic transactions results in a very
expressive calculus, enough to easily encode other concurrent primitives such
as guarded choice and multiset-synchronization (\`{a} la join-calculus). The
correctness of our encodings is proved using a suitable notion of bisimulation
equivalence. The equivalence is then applied to prove interesting ``laws of
transactions'' and to obtain a simple normal form for transactions.
| [
{
"version": "v1",
"created": "Tue, 24 Oct 2006 08:26:04 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Acciai",
"Lucia",
"",
"LIF"
],
[
"Boreale",
"Michele",
"",
"LIF"
],
[
"Zilio",
"Silvano Dal",
"",
"LIF"
]
] | |
1201.1651 | Florentin Millour | Florentin Millour (FIZEAU), Anthony Meilland (FIZEAU), Philippe Stee
(FIZEAU), Olivier Chesneau (FIZEAU) | Interactions in massive binary stars as seen by interferometry | From solar environment to stellar environment, Roscoff : France
(2011) | null | 10.1007/978-3-642-30648-8_5 | null | astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the advent of large-collecting-area instruments, the number of objects
that can be reached by optical long-baseline interferometry is steadily
increasing. We present here a few results on massive binary stars, showing the
interest of using this technique for studying the insight of interactions in
these systems. Indeed, many massive stars with extended environments host, or
are suspected to host, companion stars. These companions could have an
important role in shaping the circumstellar environment of the system. These
examples provide a view in which binarity could be an ingredient, among many
others, for the activity of these stars.
| [
{
"version": "v1",
"created": "Sun, 8 Jan 2012 19:22:13 GMT"
}
] | 2015-06-03T00:00:00 | [
[
"Millour",
"Florentin",
"",
"FIZEAU"
],
[
"Meilland",
"Anthony",
"",
"FIZEAU"
],
[
"Stee",
"Philippe",
"",
"FIZEAU"
],
[
"Chesneau",
"Olivier",
"",
"FIZEAU"
]
] | |
2106.08328 | Kyle Corcoran | Kyle A. Corcoran, Brad N. Barlow, Veronika Schaffenroth, Uli Heber,
Stephen Walser, Andreas Irgang | Eclipsing Binaries Found by the EREBOS Project: Gaia DR2
6097540197980557440 -- A Deeply Eclipsing sdB+dM System | 15 pages, 9 figures, accepted for publication by ApJ | null | 10.3847/1538-4357/ac0ae5 | null | astro-ph.SR | http://creativecommons.org/licenses/by/4.0/ | We present time-series spectroscopy and photometry of Gaia DR2
6097540197980557440, a new deeply-eclipsing hot subdwarf B (sdB) + M dwarf (dM)
binary. We discovered this object during the course of the Eclipsing Reflection
Effect Binaries from Optical Surveys (EREBOS) project, which aims to find new
eclipsing sdB+dM binaries (HW Vir systems) and increase the small sample of
studied systems. In addition to the primary eclipse, which is in excess of
$\sim$5 magnitudes in the optical, the light curve also shows features typical
for other HW Vir binaries such as a secondary eclipse and strong reflection
effect from the irradiated, cool companion. The orbital period is 0.127037 d
($\sim$3 hr), falling right at the peak of the orbital period distribution of
known HW Vir systems. Analysis of our time-series spectroscopy yields a radial
velocity semi-amplitude of $K_{\rm sdB}=100.0\pm2.0\,{\rm km\,s}^{-1}$, which
is amongst the fastest line-of-sight velocities found to date for an HW Vir
binary. State-of-the-art atmospheric models that account for deviations from
local thermodynamic equilibrium are used to determine the atmospheric
parameters of the sdB. Although we cannot claim a unique light curve modeling
solution, the best-fitting model has an sdB mass of $M_{\rm sdB} =
0.47\pm0.03\,M_{\odot}$ and a companion mass of $M_{\rm dM} =
0.18\pm0.01\,M_{\odot}$. The radius of the companion appears to be inflated
relative to theoretical mass-radius relationships, consistent with other known
HW Vir binaries. Additionally, the M dwarf is one of the most massive found to
date amongst this type of binary.
| [
{
"version": "v1",
"created": "Tue, 15 Jun 2021 18:00:00 GMT"
}
] | 2021-09-08T00:00:00 | [
[
"Corcoran",
"Kyle A.",
""
],
[
"Barlow",
"Brad N.",
""
],
[
"Schaffenroth",
"Veronika",
""
],
[
"Heber",
"Uli",
""
],
[
"Walser",
"Stephen",
""
],
[
"Irgang",
"Andreas",
""
]
] | |
1408.4992 | Soha Farhat | Soha Farhat (IRISA, UL), Samhat Abed Ellatif (UL), Samer Lahoud
(IRISA), Bernard Cousin (IRISA) | Best Operator Policy in a Heterogeneous Wireless Network | ICeND, Beyrouth : Lebanon (2014) | null | null | null | cs.NI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we perform a business analysis of our hybrid decision
algorithm for the selection of the access in a multi-operator networks
environment. We investigate the ability of the operator to express his strategy
and influence the access selection for his client. In this purpose, we study
two important coefficients of the previously proposed cost function, Wu and
Wop, and show that the value of these coefficients is not arbitrary. Simulation
results show that the value of the ratio Wu/Wop enables a selection decision
respecting operator's strategy and it affects the achieved global profit for
all cooperating operators.
| [
{
"version": "v1",
"created": "Thu, 21 Aug 2014 13:13:38 GMT"
}
] | 2014-08-22T00:00:00 | [
[
"Farhat",
"Soha",
"",
"IRISA, UL"
],
[
"Ellatif",
"Samhat Abed",
"",
"UL"
],
[
"Lahoud",
"Samer",
"",
"IRISA"
],
[
"Cousin",
"Bernard",
"",
"IRISA"
]
] | |
hep-th/9502109 | Emil Mottola | Emil Mottola | Functional Integration Over Geometries | 68 pages, Latex document using Revtex Macro package, Contribution to
the special issue of the Journal of Mathematical Physics on Functional
Integration, to be published July, 1995. | J.Math.Phys. 36 (1995) 2470-2511 | 10.1063/1.531359 | LA-UR-95-80 | hep-th gr-qc | null | The geometric construction of the functional integral over coset spaces
${\cal M}/{\cal G}$ is reviewed. The inner product on the cotangent space of
infinitesimal deformations of $\cal M$ defines an invariant distance and volume
form, or functional integration measure on the full configuration space. Then,
by a simple change of coordinates parameterizing the gauge fiber $\cal G$, the
functional measure on the coset space ${\cal M}/{\cal G}$ is deduced. This
change of integration variables leads to a Jacobian which is entirely
equivalent to the Faddeev-Popov determinant of the more traditional gauge fixed
approach in non-abelian gauge theory. If the general construction is applied to
the case where $\cal G$ is the group of coordinate reparametrizations of
spacetime, the continuum functional integral over geometries, {\it i.e.}
metrics modulo coordinate reparameterizations may be defined. The invariant
functional integration measure is used to derive the trace anomaly and
effective action for the conformal part of the metric in two and four
dimensional spacetime. In two dimensions this approach generates the
Polyakov-Liouville action of closed bosonic non-critical string theory. In four
dimensions the corresponding effective action leads to novel conclusions on the
importance of quantum effects in gravity in the far infrared, and in
particular, a dramatic modification of the classical Einstein theory at
cosmological distance scales, signaled first by the quantum instability of
classical de Sitter spacetime. Finite volume scaling relations for the
functional integral of quantum gravity in two and four dimensions are derived,
and comparison with the discretized dynamical triangulation approach to the
integration over geometries are discussed.
| [
{
"version": "v1",
"created": "Fri, 17 Feb 1995 01:05:30 GMT"
}
] | 2016-09-06T00:00:00 | [
[
"Mottola",
"Emil",
""
]
] | |
hep-ph/0701273 | Ikaros Bigi | I.I. Bigi | Flavour Dynamics & \cp Violation in the Standard Model: A Crucial Past
-- and an Essential Future | 83 pages, 8 figures; lectures given at the 2006 CERN Summer School of
High Energy Physics; Aronsborg, Sweden | null | null | UND-HEP-07-BIG01 | hep-ph | null | Our knowledge of flavour dynamics has undergone a `quantum jump' since just
before the turn of the millenium: direct \cp violation has been firmly {\em
established} in $K_L \to \pi \pi$ decays in 1999; the first \cp asymmetry
outside $K_L$ decays has been discovered in 2001 in $B_d \to \psi K_S$,
followed by $B_d \to \pi^+\pi^-$, $\eta^{\prime}K_S$ and $B \to
K^{\pm}\pi^{\mp}$, the last one establishing direct \cp violation also in the
beauty sector.Furthermore CKM dynamics allows a description of \cp insensitive
and sensitive $B$, $K$ and $D$ transitions that is impressively consistent also
on the quantitative level. Theories of flavour dynamics that could serve as
{\em alternatives} to CKM have been ruled out. Yet these novel successes of the
Standard Model (SM) do not invalidate any of the theoretical arguments for the
incompleteness of the SM. In addition we have also more direct evidence for New
Physics, namely neutrino oscillations, the observed baryon number of the
Universe, dark matter and dark energy. While the New Physics anticipated at the
TeV scale is not likely to shed any light on the SM's mysteries of flavour,
detailed and comprehensive studies of heavy flavour transitions will be
essential in diagnosing salient features of that New Physics. Strategic
principles for such studies will be outlined.
| [
{
"version": "v1",
"created": "Wed, 31 Jan 2007 16:50:27 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Bigi",
"I. I.",
""
]
] | |
2202.03137 | Apurba Das | Apurba Das | Cohomology and deformations of compatible Hom-Lie algebras | 17pages; comments are welcome | null | 10.1016/j.geomphys.2023.104951 | null | math.RA | http://creativecommons.org/licenses/by/4.0/ | In this paper, we consider compatible Hom-Lie algebras as a twisted version
of compatible Lie algebras. Compatible Hom-Lie algebras are characterized as
Maurer-Cartan elements in a suitable bidifferential graded Lie algebra. We also
define a cohomology theory for compatible Hom-Lie algebras generalizing the
recent work of Liu, Sheng and Bai. As applications of cohomology, we study
abelian extensions and deformations of compatible Hom-Lie algebras.
| [
{
"version": "v1",
"created": "Mon, 7 Feb 2022 13:31:47 GMT"
}
] | 2023-08-16T00:00:00 | [
[
"Das",
"Apurba",
""
]
] | |
1808.10318 | Yijie Shen | Yijie Shen, Xing Fu, and Mali Gong | Truncated triangular diffraction lattices and orbital-angular-momentum
detection of vortex SU(2) geometric modes | null | null | 10.1364/OE.26.025545 | null | physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We for the first time report the truncated diffraction with a triangular
aperture of the SU(2) geometric modes and propose a method to detect the
complicated orbital angular momentum (OAM) of an SU(2) wave-packet, to the best
of our knowledge. As a special vortex beam, a nonplanar SU(2) mode carrying
special intensity and OAM distributions brings exotic patterns in truncated
diffraction lattice. A meshy structure is unveiled therein by adjusting the
illuminated aperture in vicinity of the partial OAM regions, which can be
elaborately used to evaluate the partial topological charge and OAM of an SU(2)
wave-packet by counting the dark holes in the mesh. Moreover, through
controlling the size and position of the aperture at the center region, the
truncated triangular lattice can be close to the classical spot-array lattice
for measuring the center OAM. These effects being fully validated by
theoretical simulations greatly extend the versatility of topological
structures detection of special beams.
| [
{
"version": "v1",
"created": "Thu, 30 Aug 2018 14:40:56 GMT"
}
] | 2018-10-17T00:00:00 | [
[
"Shen",
"Yijie",
""
],
[
"Fu",
"Xing",
""
],
[
"Gong",
"Mali",
""
]
] | |
1907.04222 | Vikas Ahuja | Vijay Kumar Neeluru, Vikas Ahuja | Void region segmentation in ball grid array using u-net approach and
synthetic data | null | null | null | null | eess.IV cs.LG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quality inspection of solder balls by detecting and measuring the void is
important to improve the board yield issues in electronic circuits. In general,
the inspection is carried out manually, based on 2D or 3D X-ray images. For
high quality inspection, it is difficult to detect and measure voids accurately
with high repeatability through the manual inspection and the process is time
consuming. In need of high quality and fast inspection, various approaches were
proposed, but, due to the various challenges like vias, reflections from the
plating or vias, inconsistent lighting, noise and void-like artifacts makes
these approaches difficult to work in all these challenging conditions. In
recent times, deep learning approaches are providing the outstanding accuracy
in various computer vision tasks. Considering the need of high quality and fast
inspection, in this paper, we applied U-Net to segment the void regions in
soldering balls. As it is difficult to get the annotated dataset covering all
the variations of void, we proposed an approach to generated the synthetic
dataset. The proposed approach is able to segment the voids and can be easily
scaled to various electronic products.
| [
{
"version": "v1",
"created": "Sun, 7 Jul 2019 12:04:20 GMT"
}
] | 2019-07-10T00:00:00 | [
[
"Neeluru",
"Vijay Kumar",
""
],
[
"Ahuja",
"Vikas",
""
]
] | |
1305.5933 | Feng Qi | Feng Qi, Tian-Yu Zhang, and Bo-Yan Xi | Hermite-Hadamard type integral inequalities for functions whose first
derivatives are of convexity | 18 pages | Ukrainian Mathematical Journal 67 (2015), no. 4, 625-640 | 10.1007/s11253-015-1103-3 | null | math.CA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the paper, the authors establish some new Hermite-Hadamard type
inequalities for functions whose first derivatives are of convexity and apply
these inequalities to construct inequalities of special means.
| [
{
"version": "v1",
"created": "Sat, 25 May 2013 14:54:23 GMT"
}
] | 2015-12-16T00:00:00 | [
[
"Qi",
"Feng",
""
],
[
"Zhang",
"Tian-Yu",
""
],
[
"Xi",
"Bo-Yan",
""
]
] | |
2407.01160 | Petr Zasche | P. Zasche, Z. Henzl, J. Merc, J. Kara, H. Kucakova | Eight new 2+2 doubly eclipsing quadruple systems detected | paper published in: Astronomy & Astrophysics, Volume 687, id.A6, 6
pp. (2024A&A...687A...6Z) | 2024A&A...687A...6Z | 10.1051/0004-6361/202450400 | null | astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We studied eight new doubly eclipsing stellar systems. We found that they are
all rare examples of quadruple systems of 2 + 2 architecture, where both inner
pairs are eclipsing binaries. Until now, such a configuration had only been
proven for dozens of systems on the whole sky. We enlarged this rare group of
systems with four stars in the Small Magellanic Cloud (SMC) galaxy and four
brighter stars on the northern sky. These analysed systems are the following:
OGLE SMC-ECL-2339 (both eclipsing periods of 0.72884 days and 3.39576 days;
mutual orbital period of 5.95 years); OGLE SMC-ECL-3075 (1.35890 d, 2.41587 d,
9.75 yr); OGLE SMC-ECL-4756 (0.91773 d, 2.06047 d, 4.34 yr); OGLE SMC-ECL-6093
(0.90193 d, 2.03033 d, 31.2 yr); GSC 01949-01700 (0.24058 d, 0.75834 d, 21.7
yr); ZTF J171602.61+273606.5 (0.36001 d, 4.51545 d, 19.5 yr); WISE
J210935.8+390501 (0.33228 d, 3.51575 d, 1.9 yr); and V597 And (0.46770 d,
0.35250, 20.4 yr). These systems constitute a rare selection of W UMa stars
among the doubly eclipsing quadruples. For all of the systems, new dedicated
observations were obtained as well. V597 And is definitely the most interesting
system for several reasons: (1) the system is the brightest in our sample; (2)
it is a rare quintuple (2 + 2) + 1 system; and (3) it is also closest to the
Sun. It yielded the predicted angular separation of the two components of 57
mas, which is probably within the detection limits for modern,
high-angular-resolution techniques.
| [
{
"version": "v1",
"created": "Mon, 1 Jul 2024 10:29:08 GMT"
}
] | 2024-07-02T00:00:00 | [
[
"Zasche",
"P.",
""
],
[
"Henzl",
"Z.",
""
],
[
"Merc",
"J.",
""
],
[
"Kara",
"J.",
""
],
[
"Kucakova",
"H.",
""
]
] | |
astro-ph/0009302 | Victor P. Debattista | V.P. Debattista, T.B. Williams | The Bar Pattern Speed in NGC 7079 | Contribution to "Galaxy Disks and Disk Galaxies", eds: J.G. Funes
S.J. & E.M. Corsini. 2 pages, no figures | null | null | null | astro-ph | null | We have used 2D Fabry-Perot absorption-line spectroscopy of the SB0 galaxy
NGC 7079 to measure its bar pattern speed, $\om$. As in all previous cases of
bar pattern speed measurements, we find a fast bar. We estimate that NGC 7079
has been undisturbed for at least the past Gyr or roughly 8 bar rotations, long
enough for the bar to have slowed down significantly through dynamical friction
if the disk is sub-maximal.
| [
{
"version": "v1",
"created": "Tue, 19 Sep 2000 16:34:48 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Debattista",
"V. P.",
""
],
[
"Williams",
"T. B.",
""
]
] | |
2311.01121 | Olga Bernardi | Luca Baracco, Olga Bernardi, Alessandra Nardi | Higher order terms of Mather's $\beta$-function for symplectic and outer
billiards | 17 pages, 3 figures | null | null | null | math.DS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute explicitly the higher order terms of the formal Taylor expansion
of Mather's $\beta$-function for symplectic and outer billiards in a
strictly-convex planar domain $C$. In particular, we specify the third terms of
the asymptotic expansions of the distance (in the sense of the symmetric
difference metric) between $C$ and its best approximating inscribed or
circumscribed polygons with at most $n$ vertices. We use tools from affine
differential geometry.
| [
{
"version": "v1",
"created": "Thu, 2 Nov 2023 09:58:53 GMT"
}
] | 2023-11-03T00:00:00 | [
[
"Baracco",
"Luca",
""
],
[
"Bernardi",
"Olga",
""
],
[
"Nardi",
"Alessandra",
""
]
] | |
2011.08715 | Jakub K\'aninsk\'y | Jakub K\'aninsk\'y | Models of Discrete Linear Evolution for Quantum Systems | 47 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Discrete canonical evolution is a key tool for understanding the dynamics in
discrete models of spacetime, in particular those represented by a triangular
Regge lattice. We consider a finite-dimensional system whose evolution is
realized by a series of discrete-time evolution steps governed by Hamiltonian
equations of motion that are linear in the canonical coordinates. The evolution
is allowed to be irregular, which produces constraints as well as
non-uniqueness of solutions. We provide two independent and fundamentally
different approaches to canonical quantization of this system, including
detailed description of the evolution maps, measurement and path integrals. It
is argued that some irregular discrete systems may be most naturally described
by a non-unitary quantum evolution. The formalism is then applied to a simple
yet physically relevant model of massless scalar field on a two-dimensional
spacetime lattice.
| [
{
"version": "v1",
"created": "Tue, 17 Nov 2020 15:41:42 GMT"
}
] | 2020-11-18T00:00:00 | [
[
"Káninský",
"Jakub",
""
]
] | |
2409.20495 | Lukas Klawuhn | Lukas Klawuhn, Kai-Uwe Schmidt | Transitivity in wreath products with symmetric groups | 38 pages, added Acknowledgements | null | null | null | math.CO math.GR math.RT | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that the notion of a transitive subgroup of a permutation group
$P$ extends naturally to the subsets of $P$. We study transitive subsets of the
wreath product $G \wr S_n$, where $G$ is a finite abelian group. This includes
the hyperoctahedral group for $G=C_2$. We give structural characterisations of
transitive subsets using the character theory of $G \wr S_n$ and interpret such
subsets as designs in the conjugacy class association scheme of $G \wr S_n$. In
particular, we prove a generalisation of the Livingstone-Wagner theorem and
give explicit constructions of transitive sets. Moreover, we establish
connections to orthogonal polynomials, namely the Charlier polynomials, and use
them to study codes and designs in $C_r \wr S_n$. Many of our results extend
results about the symmetric group $S_n$.
| [
{
"version": "v1",
"created": "Mon, 30 Sep 2024 16:58:47 GMT"
},
{
"version": "v2",
"created": "Tue, 1 Oct 2024 17:54:01 GMT"
}
] | 2024-10-03T00:00:00 | [
[
"Klawuhn",
"Lukas",
""
],
[
"Schmidt",
"Kai-Uwe",
""
]
] | |
2102.13045 | Nicholay Topin | Nicholay Topin, Stephanie Milani, Fei Fang, Manuela Veloso | Iterative Bounding MDPs: Learning Interpretable Policies via
Non-Interpretable Methods | null | null | null | null | cs.LG cs.AI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Current work in explainable reinforcement learning generally produces
policies in the form of a decision tree over the state space. Such policies can
be used for formal safety verification, agent behavior prediction, and manual
inspection of important features. However, existing approaches fit a decision
tree after training or use a custom learning procedure which is not compatible
with new learning techniques, such as those which use neural networks. To
address this limitation, we propose a novel Markov Decision Process (MDP) type
for learning decision tree policies: Iterative Bounding MDPs (IBMDPs). An IBMDP
is constructed around a base MDP so each IBMDP policy is guaranteed to
correspond to a decision tree policy for the base MDP when using a
method-agnostic masking procedure. Because of this decision tree equivalence,
any function approximator can be used during training, including a neural
network, while yielding a decision tree policy for the base MDP. We present the
required masking procedure as well as a modified value update step which allows
IBMDPs to be solved using existing algorithms. We apply this procedure to
produce IBMDP variants of recent reinforcement learning methods. We empirically
show the benefits of our approach by solving IBMDPs to produce decision tree
policies for the base MDPs.
| [
{
"version": "v1",
"created": "Thu, 25 Feb 2021 17:55:15 GMT"
}
] | 2021-02-26T00:00:00 | [
[
"Topin",
"Nicholay",
""
],
[
"Milani",
"Stephanie",
""
],
[
"Fang",
"Fei",
""
],
[
"Veloso",
"Manuela",
""
]
] | |
gr-qc/0306123 | Takashi Hamazaki | Takashi Hamazaki (Tokyo Institute of Technology) | Evolution of Cosmological Perturbations in the Universe dominated by
Multiple Scalar Fields | 31 Pages; Latex, No figures | Phys.Rev. D66 (2002) 023529 | 10.1103/PhysRevD.66.023529 | null | gr-qc | null | By efforts of several authors, it is recently established that the dynamical
behavior of the cosmological perturbation on superhorizon scales is well
approximated in terms of that in the long wavelength limit, and the latter can
be constructed from the evolution of corresponding exactly homogeneous
universe. Using these facts, we investigate the evolution of the cosmological
perturbation on superhorizon scales in the universe dominated by oscillating
multiple scalar fields which are generally interacting with each other, and the
ratio of whose masses is incommensurable. Since the scalar fields oscillate
rapidly around the local minimum of the potential, we use the action angle
variables. We found that this problem can be formulated as the canonical
perturbation theory in which the perturbed part appearing as the result of the
expansion of the universe and the interaction of the scalar fields is bounded
by the negative power ot time. We show that by constructing the canonical
transformations properly, the transformed hamiltonian becomes simple enough to
be solved. As the result of the invetigation using the long wavelength limit
and the canonical perturbation theory, under the sufficiently general
conditions, we prove that for the adiabatic growing mode the Bardeen parameter
stays constant and that for all the other modes the Bardeen parameter decays.
From the viewpoint of the ergodic theory, it is discussed that as for the
Bardeen parameter, the sigularities appear probabilistically. This analysis
serves the understanding of the evolution of the cosmological perturbations on
superhorizon scales during reheating.
| [
{
"version": "v1",
"created": "Sun, 29 Jun 2003 14:40:45 GMT"
}
] | 2009-11-10T00:00:00 | [
[
"Hamazaki",
"Takashi",
"",
"Tokyo Institute of Technology"
]
] | |
2107.08878 | Christophe Berthod | Christophe Berthod, Haijing Zhang, Alberto F. Morpurgo, and Thierry
Giamarchi | Theory of cross quantum capacitance | Published version | Phys. Rev. Research 3, 043036 (2021) | 10.1103/PhysRevResearch.3.043036 | null | cond-mat.mes-hall | http://creativecommons.org/publicdomain/zero/1.0/ | Impressive progress in the control of atomically thin crystals is now
enabling the realization of gated structures in which two electrodes are
separated by atomic scale distances. The electrical capacitance of these
structures is determined by phenomena that are not relevant in capacitors with
larger electrode separation. With the aim to analyze these phenomena, we use
linear response theory to develop a systematic description of capacitance for
two coupled electron liquids, accounting for the wave nature of electrons, as
well as for the effect of both intra and interlayer Coulomb interactions. Our
theory leads to a general expression for the electrical capacitance in terms of
both intra and interlayer electronic polarizabilities. The intralayer
polarizability is directly related to the conventional expression for the
quantum capacitance, whereas the interlayer polarizability term accounts for
interaction-induced correlations between charges hosted by opposite capacitor
plates. We refer to this latter term as to the cross quantum capacitance. We
discuss the implications of the general expression for the capacitance, show
that it leads to established results when the effect of interlayer correlations
is negligible, and that the intra and interlayer polarizabilities play a
comparable role for capacitors with very small electrode separation. Using two
different approaches, we calculate the capacitance in specific cases, and find
that the interlayer polarizability can be either positive or negative, so that
the cross quantum capacitance can either increase or decrease the total
capacitance. We conclude by showing that the cross quantum capacitance term can
lead to a non-monotonic evolution of the total capacitance with increasing
separation between the capacitor plates, which would represent an unambiguous
manifestation of the cross quantum capacitance if observed experimentally.
| [
{
"version": "v1",
"created": "Mon, 19 Jul 2021 13:52:31 GMT"
},
{
"version": "v2",
"created": "Fri, 15 Oct 2021 06:53:11 GMT"
}
] | 2021-10-18T00:00:00 | [
[
"Berthod",
"Christophe",
""
],
[
"Zhang",
"Haijing",
""
],
[
"Morpurgo",
"Alberto F.",
""
],
[
"Giamarchi",
"Thierry",
""
]
] | |
physics/9711005 | Rex Godby | A. R. Porter and R. W. Godby | Influence of Dynamics on Magic Numbers for Silicon Clusters | 12 pages, 3 Figures, 500 KB gzipped PostScript file | null | null | null | physics.atm-clus cond-mat.mtrl-sci | null | We present the results of over 90 tight-binding molecular-dynamics
simulations of collisions between three- and five-atom silicon clusters, at a
system temperature of 2000K. Much the most likely products are found to be two
'magic' four-atom clusters. We show that previous studies, which focused on the
equilibrium binding energies of clusters of different sizes, are of limited
relevance, and introduce a new effective binding energy which incorporates the
highly anharmonic dynamics of the clusters. The inclusion of dynamics enhances
the magic nature of both Si4 and Si6 and destroys that of Si7.
| [
{
"version": "v1",
"created": "Thu, 6 Nov 1997 16:00:18 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Porter",
"A. R.",
""
],
[
"Godby",
"R. W.",
""
]
] | |
2207.02445 | Chao Yan | Steve Nyemba, Chao Yan, Ziqi Zhang, Amol Rajmane, Pablo Meyer,
Prithwish Chakraborty, Bradley Malin | Distillation to Enhance the Portability of Risk Models Across
Institutions with Large Patient Claims Database | null | null | null | null | cs.LG cs.AI cs.CY | http://creativecommons.org/licenses/by/4.0/ | Artificial intelligence, and particularly machine learning (ML), is
increasingly developed and deployed to support healthcare in a variety of
settings. However, clinical decision support (CDS) technologies based on ML
need to be portable if they are to be adopted on a broad scale. In this
respect, models developed at one institution should be reusable at another. Yet
there are numerous examples of portability failure, particularly due to naive
application of ML models. Portability failure can lead to suboptimal care and
medical errors, which ultimately could prevent the adoption of ML-based CDS in
practice. One specific healthcare challenge that could benefit from enhanced
portability is the prediction of 30-day readmission risk. Research to date has
shown that deep learning models can be effective at modeling such risk. In this
work, we investigate the practicality of model portability through a cross-site
evaluation of readmission prediction models. To do so, we apply a recurrent
neural network, augmented with self-attention and blended with expert features,
to build readmission prediction models for two independent large scale claims
datasets. We further present a novel transfer learning technique that adapts
the well-known method of born-again network (BAN) training. Our experiments
show that direct application of ML models trained at one institution and tested
at another institution perform worse than models trained and tested at the same
institution. We further show that the transfer learning approach based on the
BAN produces models that are better than those trained on just a single
institution's data. Notably, this improvement is consistent across both sites
and occurs after a single retraining, which illustrates the potential for a
cheap and general model transfer mechanism of readmission risk prediction.
| [
{
"version": "v1",
"created": "Wed, 6 Jul 2022 05:26:32 GMT"
}
] | 2022-07-07T00:00:00 | [
[
"Nyemba",
"Steve",
""
],
[
"Yan",
"Chao",
""
],
[
"Zhang",
"Ziqi",
""
],
[
"Rajmane",
"Amol",
""
],
[
"Meyer",
"Pablo",
""
],
[
"Chakraborty",
"Prithwish",
""
],
[
"Malin",
"Bradley",
""
]
] | |
2410.18710 | Ahmad Berjaoui | Ahmad Berjaoui, Louis Roussel, Eduardo Hugo Sanchez, Elizabeth
Cohen-Jonathan Moyal (CRCT,IUCT Oncopole - UMR 1037) | Uncovering the Genetic Basis of Glioblastoma Heterogeneity through
Multimodal Analysis of Whole Slide Images and RNA Sequencing Data | null | null | null | null | q-bio.QM cs.AI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Glioblastoma is a highly aggressive form of brain cancer characterized by
rapid progression and poor prognosis. Despite advances in treatment, the
underlying genetic mechanisms driving this aggressiveness remain poorly
understood. In this study, we employed multimodal deep learning approaches to
investigate glioblastoma heterogeneity using joint image/RNA-seq analysis. Our
results reveal novel genes associated with glioblastoma. By leveraging a
combination of whole-slide images and RNA-seq, as well as introducing novel
methods to encode RNA-seq data, we identified specific genetic profiles that
may explain different patterns of glioblastoma progression. These findings
provide new insights into the genetic mechanisms underlying glioblastoma
heterogeneity and highlight potential targets for therapeutic intervention.
| [
{
"version": "v1",
"created": "Wed, 23 Oct 2024 07:55:40 GMT"
},
{
"version": "v2",
"created": "Fri, 10 Jan 2025 15:37:01 GMT"
}
] | 2025-01-13T00:00:00 | [
[
"Berjaoui",
"Ahmad",
"",
"CRCT,IUCT Oncopole - UMR 1037"
],
[
"Roussel",
"Louis",
"",
"CRCT,IUCT Oncopole - UMR 1037"
],
[
"Sanchez",
"Eduardo Hugo",
"",
"CRCT,IUCT Oncopole - UMR 1037"
],
[
"Moyal",
"Elizabeth Cohen-Jonathan",
"",
"CRCT,IUCT Oncopole - UMR 1037"
]
] | |
1611.06625 | Geli Fei | Huayi Li, Geli Fei, Shuai Wang, Bing Liu, Weixiang Shao, Arjun
Mukherjee, Jidong Shao | Modeling Review Spam Using Temporal Patterns and Co-bursting Behaviors | null | null | null | null | cs.SI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Online reviews play a crucial role in helping consumers evaluate and compare
products and services. However, review hosting sites are often targeted by
opinion spamming. In recent years, many such sites have put a great deal of
effort in building effective review filtering systems to detect fake reviews
and to block malicious accounts. Thus, fraudsters or spammers now turn to
compromise, purchase or even raise reputable accounts to write fake reviews.
Based on the analysis of a real-life dataset from a review hosting site
(dianping.com), we discovered that reviewers' posting rates are bimodal and the
transitions between different states can be utilized to differentiate spammers
from genuine reviewers. Inspired by these findings, we propose a two-mode
Labeled Hidden Markov Model to detect spammers. Experimental results show that
our model significantly outperforms supervised learning using linguistic and
behavioral features in identifying spammers. Furthermore, we found that when a
product has a burst of reviews, many spammers are likely to be actively
involved in writing reviews to the product as well as to many other products.
We then propose a novel co-bursting network for detecting spammer groups. The
co-bursting network enables us to produce more accurate spammer groups than the
current state-of-the-art reviewer-product (co-reviewing) network.
| [
{
"version": "v1",
"created": "Mon, 21 Nov 2016 01:13:42 GMT"
}
] | 2016-11-22T00:00:00 | [
[
"Li",
"Huayi",
""
],
[
"Fei",
"Geli",
""
],
[
"Wang",
"Shuai",
""
],
[
"Liu",
"Bing",
""
],
[
"Shao",
"Weixiang",
""
],
[
"Mukherjee",
"Arjun",
""
],
[
"Shao",
"Jidong",
""
]
] | |
1102.0006 | Marco Matone | Marco Matone, Roberto Volpato | Vector-Valued Modular Forms from the Mumford Form, Schottky-Igusa Form,
Product of Thetanullwerte and the Amazing Klein Formula | 17 pages. Final version in Proc. Amer. Math. Soc | Proc.Am.Math.Soc.141:2575-2587,2013 | 10.1090/S0002-9939-2012-11526-6 | null | math.AG hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Vector-valued Siegel modular forms are the natural generalization of the
classical elliptic modular forms as seen by studying the cohomology of the
universal abelian variety. We show that for g>=4, a new class of vector-valued
modular forms, defined on the Teichmuller space, naturally appears from the
Mumford forms, a question directly related to the Schottky problem. In this
framework we show that the discriminant of the quadric associated to the
complex curves of genus 4 is proportional to the square root of the products of
Thetanullwerte \chi_{68}, which is a proof of the recently rediscovered Klein
`amazing formula'. Furthermore, it turns out that the coefficients of such a
quadric are derivatives of the Schottky-Igusa form evaluated at the Jacobian
locus, implying new theta relations involving the latter, \chi_{68} and the
theta series corresponding to the even unimodular lattices E_8\oplus E_8 and
D_{16}^+. We also find, for g=4, a functional relation between the singular
component of the theta divisor and the Riemann period matrix.
| [
{
"version": "v1",
"created": "Mon, 31 Jan 2011 21:00:09 GMT"
},
{
"version": "v2",
"created": "Tue, 15 Nov 2011 13:27:52 GMT"
},
{
"version": "v3",
"created": "Fri, 9 Nov 2012 11:19:02 GMT"
}
] | 2013-06-12T00:00:00 | [
[
"Matone",
"Marco",
""
],
[
"Volpato",
"Roberto",
""
]
] | |
2211.15301 | Hancheng Min | Hancheng Min and Enrique Mallada | Learning Coherent Clusters in Weakly-Connected Network Systems | arXiv admin note: text overlap with arXiv:2209.13701 | null | null | null | eess.SY cs.LG cs.SY stat.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a structure-preserving model-reduction methodology for large-scale
dynamic networks with tightly-connected components. First, the coherent groups
are identified by a spectral clustering algorithm on the graph Laplacian matrix
that models the network feedback. Then, a reduced network is built, where each
node represents the aggregate dynamics of each coherent group, and the reduced
network captures the dynamic coupling between the groups. We provide an upper
bound on the approximation error when the network graph is randomly generated
from a weight stochastic block model. Finally, numerical experiments align with
and validate our theoretical findings.
| [
{
"version": "v1",
"created": "Mon, 28 Nov 2022 13:32:25 GMT"
},
{
"version": "v2",
"created": "Fri, 12 May 2023 14:27:03 GMT"
}
] | 2023-05-15T00:00:00 | [
[
"Min",
"Hancheng",
""
],
[
"Mallada",
"Enrique",
""
]
] | |
physics/0601085 | Kyung Hyuk Kim | Kyung Hyuk Kim and Hong Qian | Fluctuation Theorems of Brownian Particles Controlled by a Maxwell's
Demon | 4 pages | Phys. Rev. E 75, 022102 (2007) | 10.1103/PhysRevE.75.022102 | null | physics.class-ph | null | We study the stochastic dynamics of Brownian particles in a heat bath and
subject to an active feedback control by an external, Maxwell's demon-like
agent. The agent uses the information of the velocity of a particle and reduces
its thermal agitation by applying a force. The entropy of the particle and the
heat bath as a whole, thus, reduces. Entropy pumping [Phys. Rev. Lett. 93,
120602 (2004)] quantifies the entropy reduction. We discover that the entropy
pumping has a dual role of work and heat contributing to free energy changes
and entropy production of the open-system with the feedback control.
Generalized Jarzynski equality and fluctuation theorems for work functional and
entropy production are developed with the presence of the entropy pumping.
| [
{
"version": "v1",
"created": "Thu, 12 Jan 2006 10:43:49 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Kim",
"Kyung Hyuk",
""
],
[
"Qian",
"Hong",
""
]
] | |
1107.5744 | Siddhartha Jonnalagadda | Siddhartha Jonnalagadda, Graciela Gonzalez | BioSimplify: an open source sentence simplification engine to improve
recall in automatic biomedical information extraction | null | Siddhartha Jonnalagadda, Graciela Gonzalez. BioSimplify: an open
source sentence simplification engine to improve recall in automatic
biomedical information extraction. In Annual Proceedings of AMIA 2010 | null | null | cs.CL | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | BioSimplify is an open source tool written in Java that introduces and
facilitates the use of a novel model for sentence simplification tuned for
automatic discourse analysis and information extraction (as opposed to sentence
simplification for improving human readability). The model is based on a
"shot-gun" approach that produces many different (simpler) versions of the
original sentence by combining variants of its constituent elements. This tool
is optimized for processing biomedical scientific literature such as the
abstracts indexed in PubMed. We tested our tool on its impact to the task of
PPI extraction and it improved the f-score of the PPI tool by around 7%, with
an improvement in recall of around 20%. The BioSimplify tool and test corpus
can be downloaded from https://biosimplify.sourceforge.net.
| [
{
"version": "v1",
"created": "Thu, 28 Jul 2011 15:40:31 GMT"
}
] | 2011-07-29T00:00:00 | [
[
"Jonnalagadda",
"Siddhartha",
""
],
[
"Gonzalez",
"Graciela",
""
]
] | |
1902.07050 | Xinrong Guan | Xinrong Guan, Ning Ding, Yueming Cai, Weiwei Yang | Wireless Key Generation from Imperfect Channel State Information:
Performance Analysis and Improvements | null | null | null | null | cs.IT math.IT | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The basis of generating secret key from the common wireless channel at two
communication parties is reciprocity. However, due to non-simultaneous
measurements and unavoidable estimation error, bias always exists and key
disagreement occurs. In this paper, performance analysis and improvements for
key generation exploiting imperfect channel statement information (CSI) is
studied. Firstly, the closed-form expression for key disagreement rate (KDR) is
derived to evaluate the key mismatch caused by time delay and estimation error.
Secondly, the energy efficiency involving power allocation between key
generation and private data transmission is presented. After that, a neural
network based prediction (NNBP) algorithm is proposed to improve the key
consistency. Simulation results verify the theoretical analysis and show that
NNBP achieves significant improvements. And it's interesting to find that NNBP
algorithm achieves a higher performance gain in low signal-to-noise ration
(SNR) and high delay condition, which is different from other methods, like
guard band based quantizer (GBBQ).
| [
{
"version": "v1",
"created": "Tue, 19 Feb 2019 13:43:50 GMT"
}
] | 2019-02-20T00:00:00 | [
[
"Guan",
"Xinrong",
""
],
[
"Ding",
"Ning",
""
],
[
"Cai",
"Yueming",
""
],
[
"Yang",
"Weiwei",
""
]
] | |
1907.03136 | Mohamed Grissa | Mohamed Grissa, Attila A. Yavuz, and Bechir Hamdaoui | TrustSAS: A Trustworthy Spectrum Access System for the 3.5 GHz CBRS Band | 9 pages, 2 Figures, 5 tables | IEEE INFOCOM 2019 - IEEE Conference on Computer Communications,
Paris, France, 2019, pp. 1495-1503 | 10.1109/INFOCOM.2019.8737533 | null | cs.NI cs.CR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As part of its ongoing efforts to meet the increased spectrum demand, the
Federal Communications Commission (FCC) has recently opened up 150 MHz in the
3.5 GHz band for shared wireless broadband use. Access and operations in this
band, aka Citizens Broadband Radio Service (CBRS), will be managed by a dynamic
spectrum access system (SAS) to enable seamless spectrum sharing between
secondary users (SUs) and incumbent users. Despite its benefits, SAS's design
requirements, as set by FCC, present privacy risks to SUs, merely because SUs
are required to share sensitive operational information (e.g., location,
identity, spectrum usage) with SAS to be able to learn about spectrum
availability in their vicinity. In this paper, we propose TrustSAS , a
trustworthy framework for SAS that synergizes state-of-the-art cryptographic
techniques with blockchain technology in an innovative way to address these
privacy issues while complying with FCC's regulatory design requirements. We
analyze the security of our framework and evaluate its performance through
analysis, simulation and experimentation. We show that TrustSAS can offer high
security guarantees with reasonable overhead, making it an ideal solution for
addressing SUs' privacy issues in an operational SAS environment.
| [
{
"version": "v1",
"created": "Sat, 6 Jul 2019 15:14:41 GMT"
}
] | 2019-07-09T00:00:00 | [
[
"Grissa",
"Mohamed",
""
],
[
"Yavuz",
"Attila A.",
""
],
[
"Hamdaoui",
"Bechir",
""
]
] | |
gr-qc/9907035 | Zhang Yuan-zhong | Ke-Jian Jin, Yuan-Zhong Zhang, and Zong-Hong Zhu | Gravitational Lensing Effects of Fermion-Fermion Stars: I. Strong Field
Case | 7 pages, LaTex and PostScript; 4 figures, PostScript | Phys.Lett. A264 (2000) 335-340 | 10.1016/S0375-9601(99)00830-0 | null | gr-qc | null | We investigate a two-component model for gravitational lenses, i.e., the
fermion-fermion star as a dark matter self-gravitating system made from two
kinds of fermions with different masses. We calculate the deflection angles
varying from arcseconds to even degrees. There is one Einstein ring. In
particular, we find three radial critical curves for radial magnifications and
four or five images of a point source. These are different from the case of the
one-component model such as the fermion stars and boson stars. This is due to
the fermion-fermion star being a two-component concentric sphere. Our results
suggest that any possible observations of the number of images more than 3
could imply a polytropic distribution of the mass inside the lens in the
universe.
| [
{
"version": "v1",
"created": "Thu, 8 Jul 1999 11:30:29 GMT"
}
] | 2009-10-31T00:00:00 | [
[
"Jin",
"Ke-Jian",
""
],
[
"Zhang",
"Yuan-Zhong",
""
],
[
"Zhu",
"Zong-Hong",
""
]
] | |
2408.15474 | Ziqian Ning | Ziqian Ning, Shuai Wang, Yuepeng Jiang, Jixun Yao, Lei He, Shifeng
Pan, Jie Ding, Lei Xie | Drop the beat! Freestyler for Accompaniment Conditioned Rapping Voice
Generation | null | null | null | null | eess.AS cs.SD | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Rap, a prominent genre of vocal performance, remains underexplored in vocal
generation. General vocal synthesis depends on precise note and duration
inputs, requiring users to have related musical knowledge, which limits
flexibility. In contrast, rap typically features simpler melodies, with a core
focus on a strong rhythmic sense that harmonizes with accompanying beats. In
this paper, we propose Freestyler, the first system that generates rapping
vocals directly from lyrics and accompaniment inputs. Freestyler utilizes
language model-based token generation, followed by a conditional flow matching
model to produce spectrograms and a neural vocoder to restore audio. It allows
a 3-second prompt to enable zero-shot timbre control. Due to the scarcity of
publicly available rap datasets, we also present RapBank, a rap song dataset
collected from the internet, alongside a meticulously designed processing
pipeline. Experimental results show that Freestyler produces high-quality
rapping voice generation with enhanced naturalness and strong alignment with
accompanying beats, both stylistically and rhythmically.
| [
{
"version": "v1",
"created": "Wed, 28 Aug 2024 01:44:08 GMT"
}
] | 2024-08-29T00:00:00 | [
[
"Ning",
"Ziqian",
""
],
[
"Wang",
"Shuai",
""
],
[
"Jiang",
"Yuepeng",
""
],
[
"Yao",
"Jixun",
""
],
[
"He",
"Lei",
""
],
[
"Pan",
"Shifeng",
""
],
[
"Ding",
"Jie",
""
],
[
"Xie",
"Lei",
""
]
] | |
1611.06598 | Octavio Arizmendi | Octavio Arizmendi and Daniel Perales | Cumulants for finite free convolution | 17 pages, v2: Typos corrected. Added Theorem 6.5 and Proposition 6.8 | null | null | null | math.CO math.OA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we define cumulants for finite free convolution. We give a
moment-cumulant formula and show that these cumulants satisfy desired
properties: they are additive with respect to finite free convolution and they
approach free cumulants as the dimension goes to infinity.
| [
{
"version": "v1",
"created": "Sun, 20 Nov 2016 21:40:05 GMT"
},
{
"version": "v2",
"created": "Tue, 7 Mar 2017 20:16:43 GMT"
}
] | 2017-03-09T00:00:00 | [
[
"Arizmendi",
"Octavio",
""
],
[
"Perales",
"Daniel",
""
]
] | |
2108.06114 | Andreas Fischer | Andreas Fischer, Iris Kleinjohann, Nikolai A. Sinitsyn and Frithjof B.
Anders | Cross-correlation spectra in interacting quantum dot systems | 19 pages, 7 figures | null | 10.1103/PhysRevB.105.035303 | null | cond-mat.mes-hall | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two-color spin-noise spectroscopy of interacting electron spins in singly
charged semiconductor quantum dots provides information on the inter quantum
dot interactions. We investigate the spin cross-correlation function in a
quantum dot ensemble using a modified semiclassical approach. Spin-correlation
functions are calculated using a Hamilton quaternion approach maintaining local
quantum mechanical properties of the spins. This method takes into account the
effects of the nuclear-electric quadrupolar interactions, the randomness of the
coupling constants, and the electron g factor on the spin-noise power-spectra.
We demonstrate that the quantum dot ensemble can be mapped on an effective
two-quantum dot problem and discuss how the characteristic length scale of the
inter-dot interaction modifies the low-frequency cross-correlation spectrum. We
argue that details on the interaction strength distribution can be extracted
from the cross-correlation spectrum when applying a longitudinal or a
transversal external magnetic field.
| [
{
"version": "v1",
"created": "Fri, 13 Aug 2021 08:07:26 GMT"
},
{
"version": "v2",
"created": "Tue, 19 Apr 2022 12:56:02 GMT"
}
] | 2022-04-20T00:00:00 | [
[
"Fischer",
"Andreas",
""
],
[
"Kleinjohann",
"Iris",
""
],
[
"Sinitsyn",
"Nikolai A.",
""
],
[
"Anders",
"Frithjof B.",
""
]
] | |
hep-ph/0610085 | Georgios Gounaris | Th. Diakonidis, G.J. Gounaris and J. Layssac | A FORTRAN code for $\gamma \gamma \to Z Z $ in SM and MSSM | 13 pages, 7 figures Revised according to the EPJC Referee suggestions | Eur.Phys.J.C50:47-52,2007 | 10.1140/epjc/s10052-006-0202-6 | PTA/06-48 | hep-ph | null | Through the present paper, the code gamgamZZ is presented, which may be used
to calculate all possible observables related to the process $\gamma \gamma \to
ZZ$, in either the Standard Model (SM), or the minimal sypersymmetric standard
model (MSSM) with real parameters.
| [
{
"version": "v1",
"created": "Sat, 7 Oct 2006 10:34:20 GMT"
},
{
"version": "v2",
"created": "Sat, 2 Dec 2006 10:55:47 GMT"
}
] | 2008-11-26T00:00:00 | [
[
"Diakonidis",
"Th.",
""
],
[
"Gounaris",
"G. J.",
""
],
[
"Layssac",
"J.",
""
]
] | |
1803.07553 | Qirui Li | Qirui Li | An intersection number formula for CM cycles in Lubin-Tate towers | 62pages | null | null | null | math.NT math.AG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give an explicit formula for the arithmetic intersection number of CM
cycles on Lubin-Tate spaces for all levels. We prove our formula by formulating
the intersection number on the infinite level. Our CM cycles are constructed by
choosing two separable quadratic extensions $K_1,K_2/F$ of non-Archimedean
local fields $F$. Our formula works for all cases, $K_1$ and $K_2$ can be
either the same or different, ramify or unramified. As applications, this
formula translate the linear Arithmetic Fundamental Lemma (linear AFL) into a
comparison of integrals. This formula can also be used to recover Gross and
Keating's result on lifting endomorphism of formal modules.
| [
{
"version": "v1",
"created": "Tue, 20 Mar 2018 17:52:30 GMT"
},
{
"version": "v2",
"created": "Mon, 12 Aug 2019 21:38:11 GMT"
},
{
"version": "v3",
"created": "Thu, 20 Feb 2020 21:47:57 GMT"
},
{
"version": "v4",
"created": "Sun, 18 Jul 2021 12:41:18 GMT"
}
] | 2021-07-20T00:00:00 | [
[
"Li",
"Qirui",
""
]
] | |
2105.06893 | David Kammer | Chun-Yu Ke, Gregory C. McLaskey, David S. Kammer | Earthquake Breakdown Energy Scaling Despite Constant Fracture Energy | 4 figures | Nat Commun 13, 1005 (2022) | 10.1038/s41467-022-28647-4 | null | physics.geo-ph physics.comp-ph | http://creativecommons.org/licenses/by/4.0/ | In the quest to determine fault weakening processes that govern earthquake
mechanics, it is common to infer the earthquake breakdown energy from
seismological measurements. Breakdown energy is observed to scale with slip,
which is often attributed to enhanced fault weakening with continued slip or at
high slip rates, possibly caused by flash heating and thermal pressurization.
However, breakdown energy varies by more than six orders of magnitude, which is
physically irreconcilable with prevailing material properties. We present a
dynamic model that demonstrates that breakdown energy scaling can occur despite
constant fracture energy and does not require thermal pressurization or other
enhanced weakening. Instead, earthquake breakdown energy scaling occurs simply
due to scale-invariant stress drop overshoot, which is affected more directly
by the overall rupture mode -- crack-like or pulse-like -- rather than from a
specific slip-weakening relationship. Our findings suggest that breakdown
energy may be used to discern crack-like earthquakes from self-healing pulses
with negative breakdown energy.
| [
{
"version": "v1",
"created": "Fri, 14 May 2021 15:28:35 GMT"
}
] | 2022-07-15T00:00:00 | [
[
"Ke",
"Chun-Yu",
""
],
[
"McLaskey",
"Gregory C.",
""
],
[
"Kammer",
"David S.",
""
]
] | |
hep-th/9705183 | null | Izumi Tsutsui, Shogo Tanimura, Hiroyuki Kobayashi | Quantum Mechanically Induced Hopf Term in the O(3) Nonlinear Sigma Model | 24 pages, Plain Tex, 1 Postscript figure included using epsf, Minor
changes in revised version | Nucl.Phys. B514 (1998) 667-687 | 10.1016/S0550-3213(97)00759-1 | KEK Preprint 97-19, KU-AMP-97004 | hep-th cond-mat | null | The Hopf term in the $2 + 1$ dimensional O(3) nonlinear sigma model, which is
known to be responsible for fractional spin and statistics, is re-examined from
the viewpoint of quantization ambiguity. It is confirmed that the Hopf term can
be understood as a term induced quantum mechanically, in precisely the same
manner as the $\theta$-term in QCD. We present a detailed analysis of the
topological aspect of the model based on the adjoint orbit parametrization of
the spin vectors, which is not only very useful in handling topological
(soliton and/or Hopf) numbers, but also plays a crucial role in defining the
Hopf term for configurations of nonvanishing soliton numbers. The Hopf term is
seen to arise explicitly as a quantum effect which emerges when quantizing an
$S^1$ degree of freedom hidden in the configuration space.
| [
{
"version": "v1",
"created": "Fri, 23 May 1997 10:38:37 GMT"
},
{
"version": "v2",
"created": "Mon, 28 Jul 1997 09:05:41 GMT"
}
] | 2009-10-30T00:00:00 | [
[
"Tsutsui",
"Izumi",
""
],
[
"Tanimura",
"Shogo",
""
],
[
"Kobayashi",
"Hiroyuki",
""
]
] | |
1803.01173 | Igor Protasov | Igor Protasov and Ksenia Protasova | Lattices of coarse structures | coarse structure, ballean, lattice of coarse structures | null | null | null | math.GN | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the lattice of coarse structures on a set $X$ and study
metrizable, locally finite and cellular coarse structures on $X$ from the
lattice point of view.
| [
{
"version": "v1",
"created": "Sat, 3 Mar 2018 14:27:07 GMT"
},
{
"version": "v2",
"created": "Fri, 16 Mar 2018 19:26:14 GMT"
},
{
"version": "v3",
"created": "Tue, 5 Jun 2018 19:15:36 GMT"
}
] | 2018-06-07T00:00:00 | [
[
"Protasov",
"Igor",
""
],
[
"Protasova",
"Ksenia",
""
]
] | |
quant-ph/0209147 | Rodolfo Mohamed Id Betan | M. Castagnino, M. Gadella, R. Id Beta, R. Laura | The Gamow Functional | 10 pages | Physics Letters A 282,2001, 245-250 | 10.1016/S0375-9601(01)00194-3 | null | quant-ph | null | We present a formalism that represents pure states, mixtures and generalized
states as functionals on an algebra containing the observables of the system.
Along these states, there are other functionals that decay exponentially at all
times and therefore can be used to describe resonance phenomena.
| [
{
"version": "v1",
"created": "Thu, 26 Sep 2002 14:44:43 GMT"
}
] | 2015-06-26T00:00:00 | [
[
"Castagnino",
"M.",
""
],
[
"Gadella",
"M.",
""
],
[
"Beta",
"R. Id",
""
],
[
"Laura",
"R.",
""
]
] | |
2208.06253 | Ren Guan | Ren Guan | $K_0$ groups of noncommutative $\mathbb{R}^{2n}$ | null | null | null | null | math.RA math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we show that the $K_0$ groups of noncommutative
$\mathbb{R}^{2n}$ are $\mathbb{Z}$ for $\forall n\in\mathbb{N}^*$ and make an
approach to the calculation of the smooth case, which will bring many new
sequence problems relating to binomial numbers.
| [
{
"version": "v1",
"created": "Mon, 8 Aug 2022 17:55:59 GMT"
},
{
"version": "v2",
"created": "Fri, 7 Oct 2022 15:28:26 GMT"
},
{
"version": "v3",
"created": "Sat, 29 Oct 2022 14:35:32 GMT"
}
] | 2022-11-01T00:00:00 | [
[
"Guan",
"Ren",
""
]
] | |
1505.08064 | Yang Huang | Zhi-Ying Huo (NAOC), Xiao-Wei Liu, Mao-Sheng Xiang, Jian-Rong Shi,
Hai-Bo Yuan, Yang Huang, Yong Zhang, Yong-Hui Hou, Yue-Fei Wang, Ming Yang | The LAMOST Survey of Background Quasars in the Vicinity Fields of the M
31 and M 33 - III. Results from the 2013 Regular Survey | 12 pages, 6 figures, Accepted for publication in a special issue of
Research in Astronomy and Astrophysics on LAMOST sciences | null | null | null | astro-ph.GA astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we report new quasars discovered in the vicinity fields of the
Andromeda (M31) and Triangulum (M33) galaxies with the LAMOST (Large Sky Area
Multi-Object Fiber Spectroscopic Telescope, also named Guoshoujing Telescope)
during the 2013 observational season, the second year of Regular Survey. In
total, 1330 new quasars are discovered in an area of $\sim$133 deg$^2$ around
M31 and M33. With $i$ magnitudes ranging from 14.79 to 20.0, redshifts from
0.08 to 4.85, the 1330 new quasars represent a significant increase of the
number of identified quasars in the vicinity fields of M31 and M33. Up to the
moment, there are in total 1870 quasars discovered by LAMOST in this area (see
also Huo et al. 2010, 2013). The much enlarged sample of known quasars in this
area can potentially be utilized to construct a precise astrometric reference
frame for the measurement of the minute proper motions of M31, M33 and the
associated substructures, vital for the understanding of the formation and
evolution of M31, M33 and the Local Group of galaxies.Meanwhile, amongst the
sample, there are in total 45, 98 and 225 quasars with $i$ magnitudes brighter
than 17.0, 17.5 and 18.0 respectively. In the aforementioned brightness bins,
15, 35 and 84 quasars are reported here for the first time, 6, 21 and 81 are
reported in Huo et al. (2010, 2013), while 0, 1 and 6 are from the Sloan
Digital Sky Survey, and 24, 41 and 54 are from the NED database. These bright
quasars provide an invaluable sample for the kinematics and chemistry study of
the interstellar/intergalactic medium of the Local Group.
| [
{
"version": "v1",
"created": "Fri, 29 May 2015 14:36:14 GMT"
}
] | 2015-06-01T00:00:00 | [
[
"Huo",
"Zhi-Ying",
"",
"NAOC"
],
[
"Liu",
"Xiao-Wei",
""
],
[
"Xiang",
"Mao-Sheng",
""
],
[
"Shi",
"Jian-Rong",
""
],
[
"Yuan",
"Hai-Bo",
""
],
[
"Huang",
"Yang",
""
],
[
"Zhang",
"Yong",
""
],
[
"Hou",
"Yong-Hui",
""
],
[
"Wang",
"Yue-Fei",
""
],
[
"Yang",
"Ming",
""
]
] | |
2004.00566 | Xun Xian | Xun Xian, Xinran Wang, Jie Ding, Reza Ghanadan | Assisted Learning: A Framework for Multi-Organization Learning | null | null | null | null | cs.LG cs.CR stat.ML | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In an increasing number of AI scenarios, collaborations among different
organizations or agents (e.g., human and robots, mobile units) are often
essential to accomplish an organization-specific mission. However, to avoid
leaking useful and possibly proprietary information, organizations typically
enforce stringent security constraints on sharing modeling algorithms and data,
which significantly limits collaborations. In this work, we introduce the
Assisted Learning framework for organizations to assist each other in
supervised learning tasks without revealing any organization's algorithm, data,
or even task. An organization seeks assistance by broadcasting task-specific
but nonsensitive statistics and incorporating others' feedback in one or more
iterations to eventually improve its predictive performance. Theoretical and
experimental studies, including real-world medical benchmarks, show that
Assisted Learning can often achieve near-oracle learning performance as if data
and training processes were centralized.
| [
{
"version": "v1",
"created": "Wed, 1 Apr 2020 16:54:49 GMT"
},
{
"version": "v2",
"created": "Sun, 31 May 2020 23:22:35 GMT"
},
{
"version": "v3",
"created": "Fri, 3 Jul 2020 02:34:01 GMT"
},
{
"version": "v4",
"created": "Fri, 4 Sep 2020 19:04:24 GMT"
},
{
"version": "v5",
"created": "Sun, 6 Dec 2020 06:35:26 GMT"
}
] | 2020-12-08T00:00:00 | [
[
"Xian",
"Xun",
""
],
[
"Wang",
"Xinran",
""
],
[
"Ding",
"Jie",
""
],
[
"Ghanadan",
"Reza",
""
]
] | |
2204.00440 | Cl\'ement Tauber | Vojkan Jak\v{s}i\'c, Claude-Alain Pillet, Cl\'ement Tauber | Approach to equilibrium in translation-invariant quantum systems: some
structural results | null | Ann. Henri Poincar \'e 25 (2024), 715-749 | 0.1007/s00023-023-01281-6 | null | math-ph cond-mat.stat-mech math.MP quant-ph | http://creativecommons.org/licenses/by/4.0/ | We formulate the problem of approach to equilibrium in algebraic quantum
statistical mechanics and study some of its structural aspects, focusing on the
relation between the zeroth law of thermodynamics (approach to equilibrium) and
the second law (increase of entropy). Our main result is that approach to
equilibrium is necessarily accompanied by a strict increase of the specific
(mean) energy and entropy. In the course of our analysis, we introduce the
concept of quantum weak Gibbs state which is of independent interest.
| [
{
"version": "v1",
"created": "Fri, 1 Apr 2022 13:52:32 GMT"
},
{
"version": "v2",
"created": "Wed, 6 Apr 2022 13:55:49 GMT"
},
{
"version": "v3",
"created": "Thu, 2 Feb 2023 14:05:50 GMT"
}
] | 2024-09-25T00:00:00 | [
[
"Jakšić",
"Vojkan",
""
],
[
"Pillet",
"Claude-Alain",
""
],
[
"Tauber",
"Clément",
""
]
] | |
0910.1830 | Navodit Misra | Navodit Misra, Guy Blelloch, R. Ravi and Russell Schwartz | Generalized Buneman pruning for inferring the most parsimonious
multi-state phylogeny | 15 pages | null | 10.1007/978-3-642-12683-3_24 | null | q-bio.PE q-bio.GN | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Accurate reconstruction of phylogenies remains a key challenge in
evolutionary biology. Most biologically plausible formulations of the problem
are formally NP-hard, with no known efficient solution. The standard in
practice are fast heuristic methods that are empirically known to work very
well in general, but can yield results arbitrarily far from optimal. Practical
exact methods, which yield exponential worst-case running times but generally
much better times in practice, provide an important alternative. We report
progress in this direction by introducing a provably optimal method for the
weighted multi-state maximum parsimony phylogeny problem. The method is based
on generalizing the notion of the Buneman graph, a construction key to
efficient exact methods for binary sequences, so as to apply to sequences with
arbitrary finite numbers of states with arbitrary state transition weights. We
implement an integer linear programming (ILP) method for the multi-state
problem using this generalized Buneman graph and demonstrate that the resulting
method is able to solve data sets that are intractable by prior exact methods
in run times comparable with popular heuristics. Our work provides the first
method for provably optimal maximum parsimony phylogeny inference that is
practical for multi-state data sets of more than a few characters.
| [
{
"version": "v1",
"created": "Fri, 9 Oct 2009 19:59:00 GMT"
},
{
"version": "v2",
"created": "Fri, 9 Oct 2009 20:11:16 GMT"
},
{
"version": "v3",
"created": "Thu, 15 Apr 2010 01:46:04 GMT"
}
] | 2015-05-14T00:00:00 | [
[
"Misra",
"Navodit",
""
],
[
"Blelloch",
"Guy",
""
],
[
"Ravi",
"R.",
""
],
[
"Schwartz",
"Russell",
""
]
] | |
cond-mat/0309049 | Alexander Shnirman | Yuriy Makhlin, Gerd Sch\"on, Alexander Shnirman | Dissipation in Josephson qubits | A tutorial prepared for the Proceedings of "New Directions in
Mesoscopic Physics" (Erice, 2002) | In: New Directions in Mesoscopic Physics (Towards Nanoscience),
pp. 197-224.Eds. R. Fazio, V. F. Gantmakher, and Y. Imry, Kluwer, Dordrecht,
2003 | 10.1016/j.chemphys.2003.09.025 | null | cond-mat.mes-hall cond-mat.supr-con | null | We discuss the dissipative dynamics of superconducting qubits in the
applicability range of the Bloch equations and beyond.
| [
{
"version": "v1",
"created": "Tue, 2 Sep 2003 04:21:21 GMT"
}
] | 2009-11-10T00:00:00 | [
[
"Makhlin",
"Yuriy",
""
],
[
"Schön",
"Gerd",
""
],
[
"Shnirman",
"Alexander",
""
]
] | |
2307.15167 | Zheng Zhang | Zheng Zhang, Zheng Ning, Chenliang Xu, Yapeng Tian, Toby Jia-Jun Li | PEANUT: A Human-AI Collaborative Tool for Annotating Audio-Visual Data | 18 pages, published in UIST'23 | null | 10.1145/3586183.3606776 10.1145/3586183.3606776
10.1145/3586183.360677610.1145/3586183.3606776 10.1145/3586183.3606776 | null | cs.HC | http://creativecommons.org/licenses/by/4.0/ | Audio-visual learning seeks to enhance the computer's multi-modal perception
leveraging the correlation between the auditory and visual modalities. Despite
their many useful downstream tasks, such as video retrieval, AR/VR, and
accessibility, the performance and adoption of existing audio-visual models
have been impeded by the availability of high-quality datasets. Annotating
audio-visual datasets is laborious, expensive, and time-consuming. To address
this challenge, we designed and developed an efficient audio-visual annotation
tool called Peanut. Peanut's human-AI collaborative pipeline separates the
multi-modal task into two single-modal tasks, and utilizes state-of-the-art
object detection and sound-tagging models to reduce the annotators' effort to
process each frame and the number of manually-annotated frames needed. A
within-subject user study with 20 participants found that Peanut can
significantly accelerate the audio-visual data annotation process while
maintaining high annotation accuracy.
| [
{
"version": "v1",
"created": "Thu, 27 Jul 2023 19:56:02 GMT"
}
] | 2023-07-31T00:00:00 | [
[
"Zhang",
"Zheng",
""
],
[
"Ning",
"Zheng",
""
],
[
"Xu",
"Chenliang",
""
],
[
"Tian",
"Yapeng",
""
],
[
"Li",
"Toby Jia-Jun",
""
]
] | |
1710.05994 | Yawei Hui | Yawei Hui and Yaohua Liu | Volumetric Data Exploration with Machine Learning-Aided Visualization in
Neutron Science | 14 pages, 7 figures; the Computer Vision Conference (CVC), Las Vegas,
Nevada, 2019; accepted | null | null | null | cs.CV | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent advancements in neutron and X-ray sources, instrumentation and data
collection modes have significantly increased the experimental data size (which
could easily contain 10$^{8}$ -- 10$^{10}$ data points), so that conventional
volumetric visualization approaches become inefficient for both still imaging
and interactive OpenGL rendition in a 3D setting. We introduce a new approach
based on the unsupervised machine learning algorithm, Density-Based Spatial
Clustering of Applications with Noise (DBSCAN), to efficiently analyze and
visualize large volumetric datasets. Here we present two examples of analyzing
and visualizing datasets from the diffuse scattering experiment of a single
crystal sample and the tomographic reconstruction of a neutron scanning of a
turbine blade. We found that by using the intensity as the weighting factor in
the clustering process, DBSCAN becomes very effective in de-noising and
feature/boundary detection, and thus enables better visualization of the
hierarchical internal structures of the neutron scattering data.
| [
{
"version": "v1",
"created": "Mon, 16 Oct 2017 20:32:10 GMT"
},
{
"version": "v2",
"created": "Wed, 15 Aug 2018 20:23:05 GMT"
},
{
"version": "v3",
"created": "Mon, 24 Sep 2018 13:37:30 GMT"
}
] | 2018-09-25T00:00:00 | [
[
"Hui",
"Yawei",
""
],
[
"Liu",
"Yaohua",
""
]
] | |
2005.08960 | Nithin V. Sabu | Nithin V. Sabu and Abhishek K. Gupta | Analysis of Diffusion Based Molecular Communication System with Multiple
Transmitters | arXiv admin note: text overlap with arXiv:2004.01874 | null | null | null | cs.IT math.IT | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Due to the limited capabilities of a single bio-nanomachine, complicated
tasks can be performed only with the co-operation of multiple bio-nanomachines.
In this work, we consider a diffusion-based molecular communication system with
a transmitter bio-nanomachine (TBN) communicating with a fully-absorbing
spherical receiver bio-nanomachine (RBN) in the presence of other TBNs. The
bits transmitted by each of the TBNs are considered as random in each time slot
and different for each TBNs in contrary to the past works in literature with
deterministic bits, which are the same to all TBNs. The TBNs are modeled using
a marked Poisson point process (PPP) with the location of TBNs as points of
PPP, and the transmit bits as marks. In this paper, we derive the expected
number of molecules observed at the RBN and the bit error probability of the
system. We validate our analysis using numerical results and provide various
design insights about the system.
| [
{
"version": "v1",
"created": "Sun, 17 May 2020 13:52:54 GMT"
}
] | 2020-05-20T00:00:00 | [
[
"Sabu",
"Nithin V.",
""
],
[
"Gupta",
"Abhishek K.",
""
]
] | |
2405.04511 | Miguel Arratia | Miguel Arratia, Sebouh J. Paul, Yuri Gotra, Hayk Hakobyan, Bryan
McKinnon | Letter of Intent: Open Charm at JLab with the sPHENIX MAPS tracker | LOI submitted to JLab PAC 52 | null | null | null | nucl-ex | http://creativecommons.org/licenses/by/4.0/ | We propose a physics program at JLab with CLAS12 focusing on open-charm
measurements, aiming to complement and expand current studies of $J/\psi$ at
(sub) threshold. This program will aid us in elucidating the $J/\psi$
production mechanisms, which is crucial for interpreting data in terms of gluon
form factors and offer potential insights into the intrinsic charm hypothesis
and cold-nuclear matter effects. We discuss the technical feasibility of
integrating the sPHENIX monolithic-active-pixel sensor (MAPS) tracker, known as
MVTX, with the CLAS12 detector. The sPHENIX MTVX would support an open-charm
program by providing excellent secondary-vertex performance for tagging $D$
mesons. We study the kinematics of $\gamma p \to \bar{D}^{0}\Lambda_{c}$
through phase-space simulations and estimate rates for the tagged
quasi-photoproduction regime available with the CLAS12 forward tagger. While
open-charm cross-sections at threshold remain uncertain, various predictions
suggest that these measurements could be feasible when combined with
conservative estimates of detector acceptance and luminosity. These preliminary
estimates motivate detailed Geant detector simulations of signals and
backgrounds, along with thorough technical assessments of operating conditions,
to further explore the feasibility of these measurements in future dedicated
CLAS12 experiments at JLab.
| [
{
"version": "v1",
"created": "Tue, 7 May 2024 17:43:02 GMT"
}
] | 2024-05-08T00:00:00 | [
[
"Arratia",
"Miguel",
""
],
[
"Paul",
"Sebouh J.",
""
],
[
"Gotra",
"Yuri",
""
],
[
"Hakobyan",
"Hayk",
""
],
[
"McKinnon",
"Bryan",
""
]
] | |
1501.00236 | Hua Xing Zhu | Hua Xing Zhu | On the calculation of soft phase space integral | 20 pages, 1 figure | null | 10.1007/JHEP02(2015)155 | SLAC-PUB-16183 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent discovery of the Higgs boson at the LHC attracts much attention to
the precise calculation of its production cross section in quantum
chromodynamics. In this work, we discuss the calculation of soft
triple-emission phase space integral, which is an essential ingredient in the
recently calculated soft-virtual corrections to Higgs boson production at
next-to-next-to-next-to-leading order. The main techniques used this
calculation are method of differential equation for Feynman integral, and
integration of harmonic polylogarithms.
| [
{
"version": "v1",
"created": "Thu, 1 Jan 2015 02:16:30 GMT"
}
] | 2015-06-23T00:00:00 | [
[
"Zhu",
"Hua Xing",
""
]
] | |
2308.15765 | Bianca Sosnovski | Bianca Sosnovski | Cryptanalysis of a Cayley Hash Function Based on Affine Maps in one
Variable over a Finite Field | 10 pages | null | null | null | cs.CR math.GR | http://creativecommons.org/licenses/by/4.0/ | Cayley hash functions are cryptographic hashes constructed from Cayley graphs
of groups. The hash function proposed by Shpilrain and Sosnovski (2016), based
on linear functions over a finite field, was proven insecure. This paper shows
that the proposal by Ghaffari and Mostaghim (2018) that uses the Shpilrain and
Sosnovski's hash in its construction is also insecure. We demonstrate its
security vulnerability by constructing collisions.
| [
{
"version": "v1",
"created": "Wed, 30 Aug 2023 05:13:55 GMT"
},
{
"version": "v2",
"created": "Thu, 31 Aug 2023 06:16:09 GMT"
},
{
"version": "v3",
"created": "Mon, 4 Sep 2023 18:16:23 GMT"
}
] | 2023-09-06T00:00:00 | [
[
"Sosnovski",
"Bianca",
""
]
] | |
1404.7230 | Xueliang Li | Xueliang Li, Guihai Yu | The skew-rank of oriented graphs | 17 pages, 4 figures | null | null | null | math.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An oriented graph $G^\sigma$ is a digraph without loops and multiple arcs,
where $G$ is called the underlying graph of $G^\sigma$. Let $S(G^\sigma)$
denote the skew-adjacency matrix of $G^\sigma$. The rank of the skew-adjacency
matrix of $G^\sigma$ is called the {\it skew-rank} of $G^\sigma$, denoted by
$sr(G^\sigma)$. The skew-adjacency matrix of an oriented graph is skew
symmetric and the skew-rank is even. In this paper we consider the skew-rank of
simple oriented graphs. Firstly we give some preliminary results about the
skew-rank. Secondly we characterize the oriented graphs with skew-rank 2 and
characterize the oriented graphs with pendant vertices which attain the
skew-rank 4. As a consequence, we list the oriented unicyclic graphs, the
oriented bicyclic graphs with pendant vertices which attain the skew-rank 4.
Moreover, we determine the skew-rank of oriented unicyclic graphs of order $n$
with girth $k$ in terms of matching number. We investigate the minimum value of
the skew-rank among oriented unicyclic graphs of order $n$ with girth $k$ and
characterize oriented unicyclic graphs attaining the minimum value. In
addition, we consider oriented unicyclic graphs whose skew-adjacency matrices
are nonsingular.
| [
{
"version": "v1",
"created": "Tue, 29 Apr 2014 04:09:12 GMT"
}
] | 2014-04-30T00:00:00 | [
[
"Li",
"Xueliang",
""
],
[
"Yu",
"Guihai",
""
]
] | |
2207.01315 | Alessandro Georgoudis | Benjamin Basso, Alessandro Georgoudis and Arthur Klemenchuk Sueiro | Structure constants of short operators in planar $\mathcal{N}=4$ SYM
theory | 6 pages, 4 figures, 1 appendix | null | 10.1103/PhysRevLett.130.131603 | null | hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an integrability-based conjecture for the three-point functions of
single-trace operators in planar $\mathcal{N}=4$ super-Yang-Mills theory at
finite coupling, in the case where two operators are protected. Our proposal is
based on the hexagon representation for structure constants of long operators,
which we complete to incorporate operators of any length using data from the
TBA/QSC formalism. We perform various tests of our conjecture, at weak and
strong coupling, finding agreement with the gauge theory through 5 loops for
the shortest three-point function and with string theory in the classical
limit.
| [
{
"version": "v1",
"created": "Mon, 4 Jul 2022 10:46:06 GMT"
}
] | 2023-04-12T00:00:00 | [
[
"Basso",
"Benjamin",
""
],
[
"Georgoudis",
"Alessandro",
""
],
[
"Sueiro",
"Arthur Klemenchuk",
""
]
] | |
1602.01135 | Pierre Uzan | Pierre Uzan | Why Super-Quantum, Non-Signaling Correlations Cannot Exist | 15 pages, 1 figure | null | null | null | quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The idea that non-local correlations stronger than quantum correlations
between two no-signaling systems could theoretically exist is based on an
incorrect statistical interpretation of the no-signaling condition. This
article shows that any physically realizable no-signaling box involving local
incompatible observables indeed requires to be described in a non-commutative,
quantum-like language of operators -which leads to the derivation of the
Tsirelson bound and then contradicts this idea.
| [
{
"version": "v1",
"created": "Tue, 2 Feb 2016 22:16:39 GMT"
},
{
"version": "v2",
"created": "Wed, 18 May 2016 07:17:35 GMT"
},
{
"version": "v3",
"created": "Sat, 28 May 2016 12:18:29 GMT"
},
{
"version": "v4",
"created": "Mon, 19 Dec 2016 16:19:54 GMT"
},
{
"version": "v5",
"created": "Tue, 20 Dec 2016 07:31:11 GMT"
},
{
"version": "v6",
"created": "Mon, 11 Nov 2019 07:17:19 GMT"
},
{
"version": "v7",
"created": "Thu, 30 Jan 2020 09:02:45 GMT"
},
{
"version": "v8",
"created": "Thu, 13 Feb 2020 21:32:33 GMT"
},
{
"version": "v9",
"created": "Thu, 22 Jul 2021 17:15:43 GMT"
}
] | 2021-07-23T00:00:00 | [
[
"Uzan",
"Pierre",
""
]
] | |
math/0206133 | Eduardo D. Sontag | David Angeli and Eduardo D. Sontag | Monotone Control Systems | See http://www.math.rutgers.edu/~sontag/ for related work | null | null | null | math.OC math.DS | null | Monotone systems constitute one of the most important classes of dynamical
systems used in mathematical biology modeling.
The objective of this paper is to extend the notion of monotonicity to
systems with inputs and outputs, a necessary first step in trying to understand
interconnections, especially including feedback loops, built up out of monotone
components.
Basic definitions and theorems are provided, as well as an application to the
study of a model of one of the cell's most important subsystems.
| [
{
"version": "v1",
"created": "Thu, 13 Jun 2002 15:20:40 GMT"
}
] | 2007-05-23T00:00:00 | [
[
"Angeli",
"David",
""
],
[
"Sontag",
"Eduardo D.",
""
]
] | |
1810.06605 | Justin Spilker | Justin Spilker (1), Kristina Nyland (2) ((1) UT Austin, (2) NRAO) | Science with an ngVLA: Characterizing Feedback Through Molecular
Outflows Across Cosmic Time | To be published in the ASP Monograph Series, "Science with a
Next-Generation VLA", ed. E. J. Murphy (ASP, San Francisco, CA) | null | null | null | astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Galactic winds are ubiquitously observed in galaxies both locally and in the
high-redshift Universe. While these winds span many orders of magnitude in both
temperature and density, observations of nearby galaxies show that the cold
molecular phase tends to dominate both the mass and momentum carried. The
capabilities of the ngVLA for the study of molecular outflows at low redshift
are described elsewhere in this Volume; here we focus on the ability of the
ngVLA to detect and image such outflows in the high-redshift Universe via deep
observations of low-J transitions of the CO molecule. The ngVLA is capable of
detecting molecular outflows from typical galaxies on the star-forming sequence
with log(Mstar/Msun) >~ 10.5 to z~3, and galaxies with higher star formation
rates to beyond z~4. The ngVLA will enable an understanding of the feedback
processes that shape galaxies throughout the epoch of galaxy assembly when the
bulk of the stars in the Universe were formed. While the emission associated
with outflows is faint in comparison to the emission from the galaxy, deep
observations are also required for high-resolution dynamical studies, allowing
for the routine simultaneous detection and imaging of the outflows.
| [
{
"version": "v1",
"created": "Mon, 15 Oct 2018 18:31:29 GMT"
}
] | 2018-10-17T00:00:00 | [
[
"Spilker",
"Justin",
"",
"UT Austin"
],
[
"Nyland",
"Kristina",
"",
"NRAO"
]
] | |
2412.03411 | Rafael Luque | Rafael Luque, Brandon Park Coy, Qiao Xue, Adina D. Feinstein,
Eva-Maria Ahrer, Quentin Changeat, Michael Zhang, Sarah E. Moran, Jacob L.
Bean, Edwin Kite, Megan Weiner Mansfield, Enric Pall\'e | A dark, bare rock for TOI-1685 b from a JWST NIRSpec G395H phase curve | 26 pages, 19 figures, 8 tables. Submitted to AAS Journals | null | null | null | astro-ph.EP | http://creativecommons.org/licenses/by/4.0/ | We report JWST NIRSpec/G395H observations of TOI-1685 b, a hot rocky
super-Earth orbiting an M2.5V star, during a full orbit. We obtain transmission
and emission spectra of the planet and characterize the properties of the phase
curve, including its amplitude and offset. The transmission spectrum rules out
clear H$_2$-dominated atmospheres, while secondary atmospheres (made of water,
methane, or carbon dioxide) cannot be statistically distinguished from a flat
line. The emission spectrum is featureless and consistent with a blackbody-like
brightness temperature, helping rule out thick atmospheres with high mean
molecular weight. Collecting all evidence, the properties of TOI-1685 b are
consistent with a blackbody with no heat redistribution and a low albedo, with
a dayside brightness temperature 0.98$\pm$0.07 times that of a perfect
blackbody in the NIRSpec NRS2 wavelength range (3.823-5.172 um). Our results
add to the growing number of seemingly airless M-star rocky planets, thus
constraining the location of the "Cosmic Shoreline".
Three independent data reductions have been carried out, all showing a
high-amplitude correlated noise component in the white and spectroscopic light
curves. The correlated noise properties are different between the NRS1 and NRS2
detectors - importantly the timescales of the strongest components (4.5 hours
and 2.5 hours, respectively) - suggesting the noise is from instrumental rather
than astrophysical origins. We encourage the community to look into the
systematics of NIRSpec for long time-series observations.
| [
{
"version": "v1",
"created": "Wed, 4 Dec 2024 15:49:15 GMT"
}
] | 2024-12-05T00:00:00 | [
[
"Luque",
"Rafael",
""
],
[
"Coy",
"Brandon Park",
""
],
[
"Xue",
"Qiao",
""
],
[
"Feinstein",
"Adina D.",
""
],
[
"Ahrer",
"Eva-Maria",
""
],
[
"Changeat",
"Quentin",
""
],
[
"Zhang",
"Michael",
""
],
[
"Moran",
"Sarah E.",
""
],
[
"Bean",
"Jacob L.",
""
],
[
"Kite",
"Edwin",
""
],
[
"Mansfield",
"Megan Weiner",
""
],
[
"Pallé",
"Enric",
""
]
] | |
1807.09550 | Iman Bahmani Jafarloo | Iman Bahmani Jafarloo and Enrico Carlini | Special apolar subset: the case of star configurations | null | null | null | null | math.AG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider a generic degree $d$ form $ F $ in $n+1$ variables.
In particular, we investigate the existence of star configurations apolar to
$F$, that is the existence of apolar sets of points obtained by the $ n $-wise
intersection of $ r $ general hyperplanes of $ \mathbb{P}^n $. We present a
complete answer for all values of $(d,r,n)$ except for $(d,d+1,2)$ when we
present an algorithmic approach.
| [
{
"version": "v1",
"created": "Wed, 25 Jul 2018 12:34:41 GMT"
},
{
"version": "v2",
"created": "Wed, 24 Apr 2019 16:57:19 GMT"
},
{
"version": "v3",
"created": "Thu, 19 Sep 2019 08:14:31 GMT"
}
] | 2019-09-20T00:00:00 | [
[
"Jafarloo",
"Iman Bahmani",
""
],
[
"Carlini",
"Enrico",
""
]
] | |
1609.03661 | Nikolai V. Ivanov | Nikolai V. Ivanov | Elements of Torelli topology: II. The extension problem | 41 pages. A major revision. The notions of admissible and peripheral
diffeomorphisms from the first version are replaced by the new notion of weak
Torelli diffeomorphisms | null | null | null | math.GT | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By Torelli topology the author understands aspects of the topology of
surfaces (potentially) relevant to the study of Torelli groups. The extension
problem in Torelli topology is the problem of determining when a diffeomorphism
of compact connected subsurface of a closed surface can be extended to a
diffeomorphism of the whole surface acting trivially on its homology. The
special case of extensions by the identity diffeomorphism was considered by A.
Putman, whose work was one of the main sources of inspiration for the present
paper.
It turns out that the answer depends on the position of the subsurface, but
only in a mild and controlled way discovered by A. Putman in the special case
of extensions by the identity. The answer is stated in terms of two homology
groups associated to the subsurface and a homomorphism between them, which we
call the difference map of a diffeomorphism of the subsurface in question.
The extension problem is motivated by the desire to extend to Torelli groups
some well established tools and results from the theory of Teichm\"uller
modular groups. In particular, in the next paper of this series the analysis of
the extension problem in this paper will be applied to get a description of all
abelian subgroups of Torelli groups. The paper is concluded by some
speculations about what is the Torelli group of a surface with non-empty
boundary.
| [
{
"version": "v1",
"created": "Tue, 13 Sep 2016 02:39:53 GMT"
},
{
"version": "v2",
"created": "Sun, 23 Apr 2017 01:48:31 GMT"
}
] | 2017-04-25T00:00:00 | [
[
"Ivanov",
"Nikolai V.",
""
]
] | |
2403.01873 | Kehan Long | Kehan Long, Shasha Li, Pancheng Wang, Chenlong Bao, Jintao Tang, Ting
Wang | Recommending Missed Citations Identified by Reviewers: A New Task,
Dataset and Baselines | COLING 2024 | null | null | null | cs.IR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Citing comprehensively and appropriately has become a challenging task with
the explosive growth of scientific publications. Current citation
recommendation systems aim to recommend a list of scientific papers for a given
text context or a draft paper. However, none of the existing work focuses on
already included citations of full papers, which are imperfect and still have
much room for improvement. In the scenario of peer reviewing, it is a common
phenomenon that submissions are identified as missing vital citations by
reviewers. This may lead to a negative impact on the credibility and validity
of the research presented. To help improve citations of full papers, we first
define a novel task of Recommending Missed Citations Identified by Reviewers
(RMC) and construct a corresponding expert-labeled dataset called CitationR. We
conduct an extensive evaluation of several state-of-the-art methods on
CitationR. Furthermore, we propose a new framework RMCNet with an Attentive
Reference Encoder module mining the relevance between papers, already-made
citations, and missed citations. Empirical results prove that RMC is
challenging, with the proposed architecture outperforming previous methods in
all metrics. We release our dataset and benchmark models to motivate future
research on this challenging new task.
| [
{
"version": "v1",
"created": "Mon, 4 Mar 2024 09:29:48 GMT"
}
] | 2024-03-05T00:00:00 | [
[
"Long",
"Kehan",
""
],
[
"Li",
"Shasha",
""
],
[
"Wang",
"Pancheng",
""
],
[
"Bao",
"Chenlong",
""
],
[
"Tang",
"Jintao",
""
],
[
"Wang",
"Ting",
""
]
] | |
1702.01863 | Duanduan Wan | Duanduan Wan and David R. Nelson and Mark J. Bowick | Thermal stiffening of clamped elastic ribbons | 7 pages, 5 figures | Phys. Rev. B 96, 014106 (2017) | 10.1103/PhysRevB.96.014106 | null | cond-mat.soft cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use molecular dynamics to study the vibrations of a thermally fluctuating
two-dimensional elastic membrane clamped at both ends. We directly extract the
eigenmodes from resonant peaks in the frequency domain of the time-dependent
height and measure the dependence of the corresponding eigenfrequencies on the
microscopic bending rigidity of the membrane, taking care also of the subtle
role of thermal contraction in generating a tension when the projected area is
fixed. At finite temperatures we show that the effective (macroscopic) bending
rigidity tends to a constant as the bare bending rigidity vanishes, consistent
with theoretical arguments that the large-scale bending rigidity of the
membrane arises from a strong thermal renormalization of the microscopic
bending rigidity. Experimental realizations include covalently-bonded
two-dimensional atomically thin membranes such as graphene and molybdenum
disulfide or soft matter systems such as the spectrin skeleton of red blood
cells or diblock copolymers.
| [
{
"version": "v1",
"created": "Tue, 7 Feb 2017 03:09:56 GMT"
}
] | 2017-07-19T00:00:00 | [
[
"Wan",
"Duanduan",
""
],
[
"Nelson",
"David R.",
""
],
[
"Bowick",
"Mark J.",
""
]
] |
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