cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Morphology and enhanced star formation in a Cartwheel-like ring galaxy
Creators: name: Renaud, F.
name: Athanassoula, E.
name: Amram, P.
name: Bosma, A.
name: Bournaud, F.
name: Duc, P. -A.
name: Epinat, B.
name: Fensch, J.
name: Kraljic, K.
name: Perret, V.
name: Struck, C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use hydrodynamical simulations of a Cartwheel-like ring galaxy, modelled as a nearly head-on collision of a small companion with a larger disc galaxy, to probe the evolution of the gaseous structures and flows, and to explore the physical conditions setting the star formation activity. Star formation is first quenched by tides as the companion approaches, before being enhanced shortly after the collision. The ring ploughs the disc material as it radially extends, and almost simultaneously depletes its stellar and gaseous reservoir into the central region, through the spokes, and finally dissolve 200 Myr after the collision. Most of star formation first occurs in the ring before this activity is transferred to the spokes and then the nucleus. We thus propose that the location of star formation traces the dynamical stage of ring galaxies, and could help constrain their star formation histories. The ring hosts tidal compression associated with strong turbulence. This compression yields an azimuthal asymmetry, with maxima reached in the side furthest away from the nucleus, which matches the star formation activity distribution in our models and in observed ring systems. The interaction triggers the formation of star clusters significantly more massive than before the collision, but less numerous than in more classical galaxy interactions. The peculiar geometry of Cartwheel-like objects thus yields a star (cluster) formation activity comparable to other interacting objects, but with notable second order differences in the nature of turbulence, the enhancement of the star formation rate, and the number of massive clusters formed.
description: Accepted for publication in MNRAS
On the propagation of vector ultra-short pulses
Creators: name: Pietrzyk, Monika
name: Kanattšikow, Igor
name: Bandelow, Uwe
Publisher: name: Weierstrass Institute
Year: 2006
Subjects: subject: ultra-short optical pulses
subject: short pulse equation
subject: integrable systems
subject: Manakov equation
subject: birefringence
subject: 37K10
subject: 78A60
subject: 35Q60
subject: 35Q51
subject: 02.30.lk
subject: 42.65.-k
subject: 42.81.Gs

description: A two component vector generalization of the Schäfer-Wayne short pulse equation which describes propagation of ultra-short pulses in optical fibers with Kerr nonlinearity beyond the slowly varying envelope approximation and takes into account the effects of anisotropy and polarization is presented. As a special case, the integrable two-component short pulse equations are constructed which represent the counterpart of the Manakov system in the case of ultra-short pulses.
APPLICABILITY OF RETROSPECTIVE EXPERIENTIAL LEARNING TO COUNTER SOCIAL EXCLUSION,TO FOSTER SOCIAL CAPITAL AND ECLECTIC THEORIES OF ECONOMICS
Creators: name: Dr. Mathew, C.D.
Publisher: name: Zenodo
Year: 2021

description: APPLICABILITY OF RETROSPECTIVE EXPERIENTIAL LEARNING TO COUNTER SOCIAL EXCLUSION,TO FOSTER SOCIAL CAPITAL AND ECLECTIC THEORIES OF ECONOMICS: PDF
title: ADCO, Cartulaire de Cîteaux pour les possessions de Chaugey et Maison-Dieu (Fin XVe siècle), Cart. 180 (11 H 755), 83 folios, f. 0077
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2017
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire

description: Cartulaire de Cîteaux pour les possessions de Chaugey et Maison-Dieu (Fin XVe siècle), Archives départementales de la Côte-d'Or, Cart. 180 (11 H 755), 83 folios, f. 0077, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de Cîteaux pour les possessions de Chaugey et Maison-Dieu (Fin XVe siècle), Archives départementales de la Côte-d'Or, Cart. 180 (11 H 755), 83 folios, f. 0077, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
A New Parameterization for the Lagrangian Density of Relativistic Mean Field Theory
Creators: name: Lalazissis, G. A.
name: König, J.
name: Ring, P.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A new parameterization for an effective non-linear Lagrangian density of relativistic mean field (RMF) theory is proposed, which is able to provide an excellent description not only for the properties of stable nuclei but also for those far from the valley of beta-stability. In addition recently measured superdeformed mimima in the Hg-region are reproduced with high accuracy.
description: 8 pages, Latex, 1 ps figure
Event-based Video Retrieval Using Audio
Creators: name: Jin, Qin
name: Schulam, Peter F.
name: Shourabh  Rawat
name: Burger, Susanne
name: Ding, Duo
name: Metze, Florian
Publisher: name: Carnegie Mellon University
Year: 2012
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Multimedia Event Detection (MED) is an annual task in the NIST TRECVID evaluation, and requires participants to build indexing and retrieval systems for locating videos in which certain predefined events are shown. Typical systems focus heavily on the use of visual data. Audio data, however, also contains rich information that can be effectively used for video retrieval, and MED could benefit from the attention of researchers in audio analysis. We present several systems for performing MED using only audio data, report the results of each system on the TRECVID MED 2011 development dataset, and compare the strengths and weaknesses of each approach.
Hela - Earth's Capital City
Creators: name: Churchill, Maxwell
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 449999
subject: Other human society not elsewhere classified
classificationCode: 440602
subject: Development geography
classificationCode: 440603
subject: Economic geography
classificationCode: 440601
subject: Cultural geography
classificationCode: 440606
subject: Political geography
classificationCode: 440607
subject: Population geography

description: An outline for a future city that serves as a capital city for all of humanity.
A thin film model for corotational Jeffreys fluids under strong slip
Creators: name: Münch, Andreas
name: Wagner, Barbara
name: Rauscher, Markus
name: Blossey, Ralf
Publisher: name: Weierstrass Institute
Year: 2006
Subjects: subject: Viscoelasticity
subject: non-newtonian fluid flows
subject: interfacial and free surface flows
subject: 76D08
subject: 76E17
subject: 74A55
subject: 83.60.Bc
subject: 47.50.+d
subject: 68.15.+e

description: We derive a thin film model for viscoelastic liquids under strong slip which obey the stress tensor dynamics of corotational Jeffreys fluids.
On orbital stability of ground states for finite crystals in fermionic Schrödinger--Poisson model
Creators: name: Komech, Alexander
name: Kopylova, Elena
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35L10, 34L25, 47A40, 81U05

description: We consider the Schrödinger--Poisson--Newton equations for finite crystals under periodic boundary conditions with one ion per cell of a lattice. The electron field is described by the $N$-particle Schrödinger equation with antisymmetric wave function. Our main results are i) the global dynamics with moving ions, and ii) the orbital stability of periodic ground state under a novel Jellium and Wiener-type conditions on the ion charge density. Under Jellium condition both ionic and electronic charge densities of the ground state are uniform.
description: 24 pages
title: Exploiting the TARC framework : the relations between educators’ attitudes towards AR, innovativeness, digital skills, and AR skills in education
Creators: name: Nikou, Stavros A.
name: Perifanou, Maria
name: Economides, Anastasios A.
Publisher: name: Springer
Year: 2025

description: Augmented Reality (AR) can offer benefits to education however, its successful implementation heavily relies on teachers’ competencies personal characteristics, attitudes, and skills. The Teachers’ Augmented Reality Competences (TARC) framework defines the main AR capacity areas for educators to employ in their teaching practice: creating, using, and managing AR resources. The current study proposes and validates a model about the impact of teachers’ personal innovativeness, attitudes towards AR and digital skills on the TARC defined competence areas. Quantitative data was collected from 150 educators worldwide. Structured equation modeling was used for the analysis. The model explains and predicts approximately 73% of the capacity of teachers to use AR for teaching. The ability to create (design, develop and modify) and manage AR resources (search, evaluate, organize as well as address and resolve ethics and safety) directly impact teachers’ capacity to use AR for teaching. Teachers’ personal innovativeness, attitudes towards AR and digital skills also have found to have an impact. Study findings deemed important for educators considering their continuous professional development towards improving their digital and specifically Augmented Reality competences.
An optimal control approach to curved rods
Creators: name: Sprekels, Jürgen
name: Tiba, Dan
Publisher: name: Weierstrass Institute
Year: 2007
Subjects: subject: Curved rods
subject: control variational methods
subject: generalized Naghdi model
subject: 49J20
subject: 74K10

description: In this paper, a new approach to the generalized Naghdi model for the deformation of three-dimensional curved rods is studied. The method is based on optimal control theory.
Small strain oscillations of an elastoplastic Kirchhoff plate
Creators: name: Guenther, Ronald B.
name: Krejčí, Pavel
name: Sprekels, Jürgen
Publisher: name: Weierstrass Institute
Year: 2007
Subjects: subject: elastoplastic plate
subject: hysteresis operators
subject: vector Prandtl-Ishlinskii model
subject: von Mises model
subject: 74C05
subject: 35Q72
subject: 47J40

description: The two dimensional equation for transversal vibrations of an elastoplastic plate is derived from a general three dimensional system with a single yield tensorial von Mises plasticity model in the five dimensional deviatoric space. It leads after dimensional reduction to a multiyield three dimensional Prandtl-Ishlinskii hysteresis model whose weight function is explicitly given. The resulting partial differential equation with hysteresis is solved by means of viscous approximations and a monotonicity argument.
Unambiguous nuclear spin detection using engineered quantum sensing sequence
Creators: name: Shu, Zijun
name: Zhang, Zhendong
name: Cao, Qingyun
name: Yang, Pengcheng
name: Plenio, Martin B.
name: Müller, Christoph
name: Lang, Johannes
name: Tomek, Nikolas
name: Naydenov, Boris
name: McGuinness, Liam P.
name: Jelezko, Fedor
name: Cai, Jianming
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Sensing, localising and identifying individual nuclear spins or frequency components of a signal in the presence of a noisy environments requires the development of robust and selective methods of dynamical decoupling. An important challenge that remains to be addressed in this context are spurious higher order resonances in current dynamical decoupling sequences as they can lead to the misidentification of nuclei or of different frequency components of external signals. Here we overcome this challenge with engineered quantum sensing sequences that achieve both, enhanced robustness and the simultaneous suppression of higher order harmonic resonances. We demonstrate experimentally the principle using a single nitrogen-vacancy center spin sensor which we apply to the unambiguous detection of external protons.
Effect of higher-order dispersion on modulation instability, soliton propagation and pulse splitting
Creators: name: Demircan, Ayhan
name: Pietrzyk, Monika
name: Bandelow, Uwe
Publisher: name: Weierstrass Institute
Year: 2007
Subjects: subject: nonlinear fibers
subject: pulse splitting
subject: third-order dispersion
subject: Modulation instability
subject: 35Q55
subject: 35Q60
subject: 78A60
subject: 42.81.Dp
subject: 42.65.Sf

description: By solving numerically the extended nonlinear Schrödinger equation we investigate the influence of higher-order dispersion effects on the propagation of optical pulses in highly nonlinear fibers. In the anomalous dispersion regime third-order dispersion can, in general, induce soliton fission and yields asymmetric spectra, whereas modulation instability can be slightly suppressed. In the normal dispersion regime we demonstrate pulse splitting by third-order dispersion, as well as its later suppression by fourth-order dispersion.
RXTE Studies of X-ray Spectral Variations with Accretion Rate in 4U 1915-05
Creators: name: Bloser, P. F.
name: Grindlay, J. E.
name: Barret, D.
name: Boirin, L.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of detailed spectral studies of the ultra-compact low mass X-ray binary (LMXB) 4U 1915-05 carried out with the Rossi X-ray Timing Explorer (RXTE) during 1996. 4U 1915-05 is an X-ray burster (XRB) known to exhibit a ~199-day modulation in its 2--12 keV flux. Observations were performed with the PCA and HEXTE instruments on RXTE at roughly one-month intervals to sample this long-term period and study accretion rate-related spectral changes. We obtain good fits with a model consisting of a blackbody and an exponentially cut-off power law. The spectral parameters are strongly correlated with both the broad-band (2--50 keV) luminosity and the position in the color-color diagram, with the source moving from a low hard state to a high soft state as the accretion rate increases. The blackbody component appears to drive the spectral evolution. Our results are consistent with a geometry in which the soft component arises from an optically thick boundary layer and the hard component from an extended Comptonizing corona. Comparing our results with those of a similar study of the brighter source 4U 1820-30 (Bloser et al. 2000), we find that the two ultra-compact LMXBs occupy similar spectral states even though the transitions occur at very different total luminosities.
description: 27 pages LaTeX, 8 figures, accepted to the Astrophysical Journal
Additional file 6 of Estimation of losses of quality-adjusted life expectancy attributed to the combination of cognitive impairment and multimorbidity among Chinese adults aged 45 years and older
Creators: name: Xiong, Suting
name: Liu, Siyuan
name: Qiao, Yanan
name: He, Dingliu
name: Ke, Chaofu
name: Shen, Yueping
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Biological Sciences not elsewhere classified
Science Policy

description: Additional file 6: Appendix Table 6. Losses of QALE (all participants without cognitive information were classified into the high cognition level) at the individual level based on the sensitivity analysis (with the corresponding 95% confidence intervals).
Entity List Completion Using Set Expansion Techniques
Creators: name: Dalvi, Bhavana
name: Callan, Jamie
name: Cohen, William W.
Publisher: name: Carnegie Mellon University
Year: 2011
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Set expansion refers to expanding a partial set of “seed” objects into a more complete set. In this paper, we focus on relation and list extraction techniques to perform Entity List Completion task through a two stage retrieval process. First stage takes given query entity and target entity examples as seeds and does set expansion. In second stage, only those candidates who have valid URI in Billion Triple dataset are ranked according to type match with given types. First stage of this system focuses on the recall while second stage tries to improve precision of the outputted list. We submitted the results on the Web as well as ClueWeb09 corpus.
Aging and quenched localization for one-dimensional random walks in random environment in the sub-ballistic regime
Creators: name: Enriquez, N.
name: Sabot, C.
name: Zindy, O.
Publisher: name: Weierstrass Institute
Year: 2007
Subjects: subject: Random walk in random environment; aging; quenched
subject: localization
subject: 60K37
subject: 60G50
subject: 60J45
subject: 82D30

description: We consider transient one-dimensional random walks in random environment with zero asymptotic speed. An aging phenomenon involving the generalized Arcsine law is proved using the localization of the walk at the foot of 'valleys' of height log $t$. In the quenched setting, we also sharply estimate the distribution of the walk at time $t$.
Spin dynamics of the quasi two dimensional spin-1/2 quantum magnet Cs_2CuCl_4
Creators: name: Veillette, Martin Y.
name: James, Andrew J. A.
name: Essler, Fabian H. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study dynamical properties of the anisotropic triangular quantum antiferromagnet Cs_2CuCl_4. Inelastic neutron scattering measurements have established that the dynamical spin correlations cannot be understood within a linear spin wave analysis. We go beyond linear spin wave theory by taking interactions between magnons into account in a 1/S expansion. We determine the dynamical structure factor and carry out extensive comparisons with experimental data. We find that compared to linear spin wave theory a significant fraction of the scattering intensity is shifted to higher energies and strong scattering continua are present. However, the 1/S expansion fails to account for the experimentally observed large quantum renormalization of the exchange energies.
description: 13 pages, 11 figures, higher quality figures can be obtained from the authors
Efficient quantum repeater in perspectives of both entanglement concentration rate and LOCC complexity
Creators: name: Su, Zhaofeng
name: Guan, Ji
name: Li, Lvzhou
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum entanglement is an indispensable resource for many significant quantum information processing tasks. However, because of the noise in quantum channels, it is difficult to distribute quantum entanglement over a long distance in practice. A solution for this challenge is the quantum repeater which can extend the distance of entanglement distribution. In this scheme, the time consumption of classical communication and local operations takes an important place in perspective of time efficiency. Motivated by this observation, we exploit the basic quantum repeater scheme in perspectives of not only the optimal rate of entanglement concentration but also the complexity of local operations and classical communication. Firstly, we consider the case where two two-qubit pure states are prepared. We construct a protocol with the optimal entanglement concentration rate and less consumption of local operations and classical communication. We also find a criteria for the projective measurements to achieve the optimal probability. Secondly, we exploit the case where two general pure states are prepared and general measurements are considered. We get an upper bound on the probability for a successful measurement operation to produce a maximally entangled state without any further local operations.
Oriented Matroid Theory as a Mathematical Framework for M-Theory
Creators: name: Nieto, J. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We claim that $M$(atroid) theory may provide a mathematical framework for an underlying description of $M$-theory. Duality is the key symmetry which motivates our proposal. The definition of an oriented matroid in terms of the Farkas property plays a central role in our formalism. We outline how this definition may be carried over $M$-theory. As a consequence of our analysis we find a new type of action for extended systems which combines dually the $p$-brane and its dual $p^{\perp}$-brane.
description: 12 pages, Latex; some improvements introduced, typos corrected
Enhanced Polyphone Decision Tree Adaptation for Accented Speech Recognition
Creators: name: Udhyakumar  Nallasamy
name: Metze, Florian
name: Schultz, Tanja
Publisher: name: Carnegie Mellon University
Year: 2013
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: State-of-the-art Automatic Speech Recognition (ASR) models struggle to handle accented speech, particularly if the target accent is under-represented in the training data. The acoustic variations presented by an unfamiliar accent, render the ASR polyphone decision tree (PDT) and its associated Gaussian mixture models (GMM) misfit to the test data. In this paper, we improve on the previous work of adapting the polyphone decision tree, using a semi-continuous model based approach to address the problem of data sparsity. We extend the existing PDT to introduce additional states with shared parameters, corresponding to the new contextual variations identified in the adaptation data, while still robustly estimating the state based parameters on a small adaptation set. We conduct ASR experiments on Arabic and English accents and show that our technique performs better than Maximum A-Posteriori (MAP) adaptation and a previous implementation of polyphone decision tree specialization (PDTS). Compared to MAP adaptation, we obtain 7% relative improvement for Dialectal Arabic and 13.8% relative improvement for Accented English.
A Microscopic Energy- and Density-Dependent Effective Interaction and its Test by Nucleus-Nucleus Scattering
Creators: name: Bartnitzky, G.
name: Clement, H.
name: Czerski, P.
name: Müther, H.
name: Nuoffer, F.
name: Siegler, J.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: An effective nucleon-nucleon interaction calculated in nuclear matter from the Bonn potential has been parametrized in terms of a local density- and energy-dependent two-body interaction. This allows to calculate the real part of the nucleus-nucleus scattering potential and to test this effective interaction over a wide region of densities ($ρ\leq 3ρ_0$) produced dynamically in scattering experiments. Comparing our calculations with empirical potentials extracted from data on light and heavy ion scattering by model-unrestricted analysis methods, we find quantitative agreement with the exception of proton scattering. The failure in this case may be traced back to the properties of the effective interaction at low densities, for which the nuclear matter results are not reliable. The success of the interaction at high overlap densities confirms the empirical evidence for a soft equation of state for cold nuclear matter.
description: 8 pages 3 Figures included, to appear in Phys. Lett. B
Plasmon-induced demagnetization and magnetic switching in nickel nanoparticle arrays
Creators: name: Kataja, Mikko
name: Freire-Fernandez, Francisco
name: Witteveen, Jorn P.
name: Hakala, Tommi
name: Törmä, Päivi
name: van Dijken, Sebastiaan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on the manipulation of magnetization by femtosecond laser pulses in a periodic array of cylindrical nickel nanoparticles. By performing experiments at different wavelength, we show that the excitation of collective surface plasmon resonances triggers demagnetization in zero field or magnetic switching in a small perpendicular field. Both magnetic effects are explained by plasmon-induced heating of the nickel nanoparticles to their Curie temperature. Model calculations confirm the strong correlation between the excitation of surface plasmon modes and laser-induced changes in magnetization.
description: 4 pages, 4 figures
Observations of Type I Bursts from Neutron Stars
Creators: name: Swank, Jean H.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Observations of Type I X-ray bursts have long been taken as evidence that the sources are neutron stars. Black body models approximate the spectral data and imply a suddenly heated neutron star cooling over characteristic times of seconds to minutes. The phenomena are convincingly explained in terms of nuclear burning of accreted gas on neutron stars with low mass companion stars. Prospects are promising that detailed theory and data from RXTE and future missions will lead to better determinations of important physical parameters (neutron star mass and radius, composition of the accreting gas, distance of the source). Among the variety of bursts observed, there are probably representatives of different kinds of explosive burning. RXTE's discovery of a 2.5 ms persistent coherent period from one Type I burster has now linked bursters indisputably to the epitome of a neutron star, a fast spinning magnetic compact object. Oscillations in some bursts had already been thought to arise from the neutron stars' rotations. Detailed observations of these oscillations are touchstones of how the explosive bursts originate and progress, as well as independent measures of the neutron star parameters.
description: 10 pages, 4 figures, to appear in "Cosmic Explosions, Proceedings of the 10th October Astrophysics in Maryland, AIP Conf. Proceedings 522, ed. S. S. Holt & W. W. Zhang, (AIP: Woodbury, N. Y.), 2000
Additional file 7 of Estimation of losses of quality-adjusted life expectancy attributed to the combination of cognitive impairment and multimorbidity among Chinese adults aged 45 years and older
Creators: name: Xiong, Suting
name: Liu, Siyuan
name: Qiao, Yanan
name: He, Dingliu
name: Ke, Chaofu
name: Shen, Yueping
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Biological Sciences not elsewhere classified
Science Policy

description: Additional file 7: Appendix Table 7. Losses of QALE (all participants without cognitive information were classified into the high cognition level) at the population level based on the sensitivity analysis (with the corresponding 95% confidence intervals).
Reverse approximation of energetic solutions to rate-independent processes
Creators: name: Mielke, Alexander
name: Rindler, Filip
Publisher: name: Weierstrass Institute
Year: 2007
Subjects: subject: Rate-independent processes
subject: energetic solutions
subject: approximate incremental problems
subject: Gamma convergence
subject: 49J40
subject: 49S05
subject: 65J15
subject: 74C05
subject: 74H15

description: Energetic solutions to rate-independent processes are usually constructed via time-incremental minimization problems. In this work we show that all energetic solutions can be approximated by incremental problems if we allow approximate minimizers, where the error in minimization has to be of the order of the time step. Moreover, we study sequences of problems where the energy functionals have a Gamma limit.
Low-loss Tunable 1-D ITO-slot Photonic Crystal Nanobeam Cavity
Creators: name: Amin, Rubab
name: Tahersima, Mohammad H.
name: Ma, Zhizhen
name: Suer, Can
name: Liu, Ke
name: Dalir, Hamed
name: Sorger, Volker J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Tunable optical material properties enable novel applications in both versatile metamaterials and photonic components including optical sources and modulators. Transparent conductive oxides (TCOs) are able to highly tune their optical properties with applied bias via altering their free carrier concentration and hence plasma dispersion. The TCO material indium tin oxide (ITO) exhibits unity-strong index changes, and epsilon-near-zero behavior. However, with such tuning the corresponding high optical losses, originating from the fundamental Kramers-Kronig relations, result in low cavity finesse. However, achieving efficient tuning in ITO-cavities without using light matter interaction enhancement techniques such as polaritonic modes, which are inherently lossy, is a challenge. Here we discuss a novel one-dimensional photonic crystal nanobeam cavity to deliver a cavity system offering a wide range of resonance tuning range, while preserving physical compact footprints. We show that a vertical Silicon-slot waveguide incorporating an actively gated-ITO layer delivers ~3.4 nm of tuning. By deploying distributed feedback, we are able to keep the Q-factor moderately high with tuning. Combining this with the sub-diffraction limited mode volume (0.1 (λ/2n)3) from the photonic (non-plasmonic) slot waveguide, facilitates a high Purcell factor exceeding one thousand. This strong light-matter-interaction shows that reducing the mode volume of a cavity outweighs reducing the losses in diffraction limited modal cavities such as those from bulk Si3N4. These tunable cavities enable future modulators and optical sources such as tunable lasers.
Empirical Risk Minimization with Approximations of Probabilistic Grammars
Creators: name: Cohen, Shay B.
name: Smith, Noah A.
Publisher: name: Carnegie Mellon University
Year: 2010
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Probabilistic grammars are generative statistical models that are useful for compositional and sequential structures. We present a framework, reminiscent of structural risk minimization, for empirical risk minimization of the parameters of a fixed probabilistic grammar using the log-loss. We derive sample complexity bounds in this framework that apply both to the supervised setting and the unsupervised setting.
On an evolutionary model for complete damage based on energies and stresses
Creators: name: Mielke, Alexander
Publisher: name: Weierstrass Institute
Year: 2007
Subjects: subject: Weak energetic solution
subject: rate independent energetic system
subject: complete damage
subject: Gamma convergence
subject: 35K65
subject: 35K85
subject: 49S05
subject: 74C05
subject: 74R05

description: A recent model allows for complete damage, such that the deformation is not well-defined. The evolution can be described in terms of energy densities and stresses. We introduce the notion of weak energetic solution and show how the existence theory can be generalized to convex, but non-quadratic elastic energies.
Non-colliding Gaussian Process Regressions
Creators: name: Wang, Wayne
Publisher: name: The Australian National University
Year: 2020
Subjects: non-colliding constraint
inequality constraints
bounded Gaussian process regression

description: Imposing constraints on models has been a way to incorporate prior information to develop more realistic models and/or compensate for the lack of data. In this thesis, we propose a way to impose a “non-colliding constraint” on Gaussian process regression when modelling multiple (unknown) functions at the same time. The non-colliding constraint prevents the situation where the predictions from different regressions intersect with each other. This is a desirable property when the physical process that we are trying to model exhibits a multi-layered structure such as in stratigraphy or when the underlying functions should not intersect, for example the highest, and lowest temperature of a given time period. We show that the non-colliding problem can be reformulated to modelling a sequence of Gaussian process regressions with inequality constraints. We then use a piecewise linear approximation approach proposed by López-Lopera et al. (2018) to achieve this. Through an extensive simulation study, we show that our method is able to produce more realistic models that reflect the prior information of no collisions, as well as smaller errors with less variability than the standard Gaussian process regression especially when the training set is small.
Ab-initio study of structure and dynamics properties of crystalline ice
Creators: name: Adeagbo, W. A.
name: Zayak, A.
name: Entel, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigated the structural and dynamical properties of a tetrahedrally coordinated crystalline ice from first principles based on density functional theory within the generalized gradient approximation with the projected augmented wave method. First, we report the structural behaviour of ice at finite temperatures based on the analysis of radial distribution functions obtained by molecular dynamics simulations. The results show how the ordering of the hydrogen bonding breaks down in the tetrahedral network of ice with entropy increase in agreement with the neutron diffraction data. We also calculated the phonon spectra of ice in a 3x1x1 supercell by using the direct method. So far, due to the direct method used in this calculation, the phonon spectra is obtained without taking into account the effect of polarization arising from dipole-dipole interactions of water molecules which is expected to yield the splitting of longitudinal and transverse optic modes at the Gamma-point. The calculated longitudinal acoustic velocities from the initial slopes of the acoustic mode is in a reasonable agreement with the neutron scatering data. The analysis of the vibrational density of states shows the existence of a boson peak at low energy of translational region a characteristic common to amorphous systems.
description: International symposium on structure and dynamics of heterogeneous system SDHS'03
Qubit absorption refrigerator at strong coupling
Creators: name: Mu, Anqi
name: Agarwalla, Bijay Kumar
name: Schaller, Gernot
name: Segal, Dvira
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We demonstrate that a quantum absorption refrigerator can be realized from the smallest quantum system, a qubit, by coupling it in a non-additive (strong) manner to three heat baths. This function is un-attainable for the qubit model under the weak system-bath coupling limit, when the dissipation is additive. In an optimal design, the reservoirs are engineered and characterized by a single frequency component. We obtain then closed expressions for the cooling window and refrigeration efficiency, as well as bounds for the maximal cooling efficiency and the efficiency at maximal power. Our results agree with macroscopic designs and with three-level models for quantum absorption refrigerators, which are based on the weak system-bath coupling assumption. Beyond the optimal limit, we show with analytic calculations and numerical simulations that the cooling efficiency varies in a non-universal manner with model parameters. Our work demonstrates that strongly-coupled quantum machines can exhibit function that is un-attainable under the weak system-bath coupling assumption.
Swarm-C L2 mass density data for December 2018 - March 2019
Creators: name: Gasperini, Federico
Publisher: name: Zenodo
Year: 2024

description: Swarm-C L2 density data.

Title: Ionosphere-Thermosphere Response to Pronounced High-Speed Streams as Revealed by Ocean-Based TEC, Swarm-C, and GOLDAuthors: Federico Gasperini (Orion Space Solutions); Irfan Azeem (NOAA)Journal: Geophysical Research LettersManuscript ID: 2024GL109214
Empirical Risk Minimization for Probabilistic Grammars: Sample Complexity and Hardness of Learning
Creators: name: Cohen, Shay B.
name: Smith, Noah A.
Publisher: name: Carnegie Mellon University
Year: 2012
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Probabilistic grammars are generative statistical models that are useful for compositional and sequential structures. They are used ubiquitously in computational linguistics. We present a framework, reminiscent of structural risk minimization, for empirical risk minimization of probabilistic grammars using the log-loss. We derive sample complexity bounds in this framework that apply both to the supervised setting and the unsupervised setting. By making assumptions about the underlying distribution that are appropriate for natural language scenarios, we are able to derive distribution-dependent sample complexity bounds for probabilistic grammars. We also give simple algorithms for carrying out empirical risk minimization using this framework in both the supervised and unsupervised settings. In the unsupervised case, we show that the problem of minimizing empirical risk is NP-hard. We therefore suggest an approximate algorithm, similar to expectation-maximization, to minimize the empirical risk.
Emotion Recognition using Imperfect Speech Recognition
Creators: name: Metze, Florian
name: Batliner, Anton
name: Eyben, Florian
name: Polzehl, Tim
name: Schuller, Bjorn
name: Steidl, Stefan
Publisher: name: Carnegie Mellon University
Year: 2010
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: This paper investigates the use of speech-to-text methods for assigning an emotion class to a given speech utterance. Previous work shows that an emotion extracted from text can convey complementary evidence to the information extracted by classifiers based on spectral, or other non-linguistic features. As speech-to-text usually presents significantly more computational effort, in this study we investigate the degree of speech-to-text accuracy needed for reliable detection of emotions from an automatically generated transcription of an utterance. We evaluate the use of hypotheses in both training and testing, and compare several classification approaches on the same task. Our results show that emotion recognition performance stays roughly constant as long as word accuracy doesn't fall below a reasonable value, making the use of speech-to-text viable for training of emotion classifiers based on linguistics.
Hölder index for density states of (alpha,1,beta)-superprocesses at a given point
Creators: name: Fleischmann, Klaus
name: Mytnik, Leonid
name: Wachtel, Vitali
Publisher: name: Weierstrass Institute
Year: 2008
Subjects: subject: Hölder continuity at a given point
subject: optimal exponent
subject: multifractal
subject: structure
subject: Hausdorff dimension
subject: 60J80
subject: 60G57

description: A Hölder regularity index at given points for density states of (alpha,1,beta)-superprocesses with alpha>1+beta is determined. It is shown that this index is strictly greater than the optimal index of local Holder continuity for those density states.
Yang-Mills theory in Landau gauge as a liquid crystal
Creators: name: Chernodub, M. N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using a spin-charge separation of the gluon field in the Landau gauge we show that the SU(2) Yang-Mills theory in the low-temperature phase can be considered as a nematic liquid crystal. The ground state of the nematic crystal is characterized by the A^2 condensate of the gluon field. The liquid crystal possesses various topological defects (instantons, monopoles and vortices) which are suggested to play a role in non-perturbative features of the theory.
description: 9 pages, no figures
Elastoplastic Timoshenko beams
Creators: name: Krejčí, Pavel
name: Sprekels, Jürgen
name: Wu, Hao
Publisher: name: Weierstrass Institute
Year: 2009
Subjects: subject: elastoplasticity
subject: Timoshenko beam
subject: anisotropic hysteresis operators
subject: Prandtl--Ishlinskii model
subject: von Mises model
subject: 34C55
subject: 35Q72
subject: 47J40
subject: 74C05
subject: 74K10
subject: 74N30

description: A Timoshenko type elastoplastic beam equation is derived by dimensional reduction from a general 3D system with von Mises plasticity law. It consists of two second-order hyperbolic equations with an anisotropic vectorial Prandtl--Ishlinskii hysteresis operator. Existence and uniqueness of a strong solution for an initial-boundary value problem is proven via standard energy and monotonicity methods.
O(4) Expansion of the ladder Bethe-Salpeter equation
Creators: name: Nieuwenhuis, Taco
name: Tjon, J. A.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Bethe-Salpeter amplitude is expanded on a hyperspherical basis, thereby reducing the original 4-dimensional integral equation into an infinite set of coupled 1-dimensional ones. It is shown that this representation offers a highly accurate method to determine numerically the bound state solutions. For generic cases only a few hyperspherical waves are needed to achieve convergence, both for the ground state as well as for radially or orbitally excited states. The wave function is reconstructed for several cases and in particular it is shown that it becomes independent of the relative time in the nonrelativistic regime.
description: 21 pages, revtex
Emotion Identification for Evaluation of Synthesized Emotional Speech
Creators: name: Steidl, Stefan
name: Polzehl, Tim
name: H. Timothy  Bunnell
name: Dou, Ying
name: Prasanna Kumar Muthukumar
name: Perry, Daniel
name: Kishore  Prahallad
name: Vaughn, Callie
name: Black, Alan
name: Metze, Florian
Publisher: name: Carnegie Mellon University
Year: 2012
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: In this paper, we propose to evaluate the quality of emotional speech synthesis by means of an automatic emotion identification system. We test this approach using five different parametric speech synthesis systems, ranging from plain non-emotional synthesis to full re-synthesis of pre-recorded speech. We compare the results achieved with the automatic system to those of human perception tests. While preliminary, our results indicate that automatic emotion identification can be used to assess the quality of emotional speech synthesis, potentially replacing time consuming and expensive human perception tests
Computing the Absolute Gibbs Free Energy in Atomistic Simulations: Applications to Defects in Solids
Creators: name: Cheng, Bingqing
name: Ceriotti, Michele
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Gibbs free energy is the fundamental thermodynamic potential underlying the relative stability of different states of matter under constant-pressure conditions. However, computing this quantity from atomic-scale simulations is far from trivial. As a consequence, all too often the potential energy of the system is used as a proxy, overlooking entropic and anharmonic effects. Here we discuss a combination of different thermodynamic integration routes to obtain the absolute Gibbs free energy of a solid system starting from a harmonic reference state. This approach enables the direct comparison between the free energy of different structures, circumventing the need to sample the transition paths between them. We showcase this thermodynamic integration scheme by computing the Gibbs free energy associated with a vacancy in BCC iron, and the intrinsic stacking fault free energy of nickel. These examples highlight the pitfalls of estimating the free energy of crystallographic defects only using the minimum potential energy, which overestimates the vacancy free energy by 60% and the stacking-fault energy by almost 300% at temperatures close to the melting point.
The Thermodynamics of a Single Bead in a Vibrating Container
Creators: name: Evesque, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Statistics of the 1d dynamics of a single particle in a box of length L is studied under different conditions of periodic excitation: vibrated container, or 1 wall moving periodically or two walls vibrating in opposite phases. Theoretical predictions for the mean typical speed are derived using some Random Phase Approximation (RPA) for small b/L ratio, as functions of the amplitude b and frequency f of vibration and of the collision restitution coefficient r=vout/vin. They are compared to numerical simulations. It is concluded that RPA is valid for b/L>0.005, that long time memory, i.e. non ergodicity, and/or resonance develop at large restitution coefficient r (r>0.95) and/or at large b/L, that scales always as f, and scales as b except for large b/L values, i.e. b/L>0.02, and that the relative velocity =[/(bf)] is about 1 when r<0.4-0.5 . Relative standard deviation DV/V is found to be approximately constant, i.e. DV/V is about 0.3 except when resonance occurs; in this case, memory effect and non ergodicity effects are observed and become too important . Pacs # : 5.40 ; 45.70 ; 64 ; 83.70.Fn
description: 26 pages + 3 pages, 13 figures
Derived invariance of the cap product in Hochschild theory
Creators: name: A., Marco A. Armenta
name: Keller, Bernhard
Publisher: name: arXiv
Year: 2017
Subjects: subject: K-Theory and Homology (math.KT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We prove derived invariance of the cap product for associative algebras projective over a commutative ring.
description: 4 pages
Correct path-integral formulation of the quantum thermal field theory in the coherent state representation
Creators: name: Jun-Chen, Su
name: Fu-Hou, Zheng
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This paper has been superseded by hep-th/0510131.
description: This paper has been withdrawn