cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Beiträge zur neuesten Geschichte der deutsch-katholischen Kirchenverfassung in der oberrheinischen katholischen Kirchenprovinz der vereinten Staaten Würtemberg, Baden, beider Hessen, und Nassau mit Frankfurt; 1823
title: nebst einem Anhange, enhaltend I. Die päpstliche Erections- und Circumsriptions-Bulle vom 16ten August 1821 ; II. Die entworfene Kirchenpragmatik der oberrheinischen Kirchenprovinz ; III. Das Formular eines Fundations-Instruments
titleType: Subtitle
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2007

description: In Fraktur
Non-stationarity and Dissipative Time Crystals: Spectral Properties and Finite-Size Effects
Creators: name: Booker, Cameron
name: Buča, Berislav
name: Jaksch, Dieter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We discuss the emergence of non-stationarity in open quantum many-body systems. This leads us to the definition of dissipative time crystals which display experimentally observable, persistent, time-periodic oscillations induced by noisy contact with an environment. We use the Loschmidt echo and local observables to indicate the presence of a finite sized dissipative time crystal. Starting from the closed Hubbard model we then provide examples of dissipation mechanisms that yield experimentally observable quantum periodic dynamics and allow analysis of the emergence of finite sized dissipative time crystals. For a disordered Hubbard model including two-particle loss and gain we find a dark Hamiltonian driving oscillations between GHZ states in the long-time limit. Finally, we discuss how the presented examples could be experimentally realized.
description: 31 pages, 5 figures. Accepted in NJP: Focus on Time Crystals. Added previously omitted relevant references
Spectral modelling of the Alpha Virginis (Spica) binary system
Creators: name: Palate, M.
name: Koenigsberger, G.
name: Rauw, G.
name: Harrington, D.
name: Moreno, E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context: The technique of matching synthetic spectra computed with theoretical stellar atmosphere models to the observations is widely used in deriving fundamental parameters of massive stars. When applied to binaries, however, these models generally neglect the interaction effects present in these systems Aims: The aim of this paper is to explore the uncertainties in binary stellar parameters that are derived from single-star models Methods: Synthetic spectra that include the tidal perturbations and irradiation effects are computed for the binary system alpha Virginis (Spica) using our recently-developed CoMBiSpeC model. The synthetic spectra are compared to S/N~2000 observations and optimum values of Teff and log(g) are derived. Results: The binary interactions have only a small effect on the strength of the photospheric absorption lines in Spica (<2% for the primary and <4% for the secondary). These differences are comparable to the uncertainties inherent to the process of matching synthetic spectra to the observations and thus the derived values of Teff and log(g) are unaffected by the binary perturbations. On the other hand, the interactions do produce significant phase-dependent line profile variations in the primary star, leading to systematic distortions in the shape of its radial velocity curve. Migrating sub-features ("bumps") are predicted by our model to be present in the same photospheric lines as observed, and their appearance does not require any a priori assumptions regarding non-radial pulsation modes. Matching the strength of lines in which the most prominent "bumps" occur requires synthetic spectra computed with larger "microturbulence" than that required by other lines.
description: Accepted for publication in A&A
Online Graph-Based Change Point Detection in Multiband Image Sequences
Creators: name: Borsoi, Ricardo Augusto
name: Richard, Cédric
name: Ferrari, André
name: Chen, Jie
name: Bermudez, José Carlos Moreira
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The automatic detection of changes or anomalies between multispectral and hyperspectral images collected at different time instants is an active and challenging research topic. To effectively perform change-point detection in multitemporal images, it is important to devise techniques that are computationally efficient for processing large datasets, and that do not require knowledge about the nature of the changes. In this paper, we introduce a novel online framework for detecting changes in multitemporal remote sensing images. Acting on neighboring spectra as adjacent vertices in a graph, this algorithm focuses on anomalies concurrently activating groups of vertices corresponding to compact, well-connected and spectrally homogeneous image regions. It fully benefits from recent advances in graph signal processing to exploit the characteristics of the data that lie on irregular supports. Moreover, the graph is estimated directly from the images using superpixel decomposition algorithms. The learning algorithm is scalable in the sense that it is efficient and spatially distributed. Experiments illustrate the detection and localization performance of the method.
Physical ageing and new representations of some Lie algebras of local scale-invariance
Creators: name: Henkel, Malte
name: Stoimenov, Stoimen
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Indecomposable but reducible representations of several Lie algebras of local scale-transformations, including the Schrödinger and conformal Galilean algebras, and some of their applications in physical ageing are reviewed. The physical requirement of the decay of co-variant two-point functions for large distances is related to analyticity properties in the coordinates dual to the physical masses or rapidities.
description: Latex2e (+ macros), 17 pages with 1 figure included, proceedings conference LT-10 Varna (Bulgarie)
Detection and Isolation of Link Failures under the Agreement Protocol
Creators: name: Rahimian, M. Amin
name: Preciado, Victor M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Systems and Control (eess.SY)
subject: Social and Information Networks (cs.SI)
subject: Dynamical Systems (math.DS)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In this paper a property of the multi-agent consensus dynamics that relates the failure of links in the network to jump discontinuities in the derivatives of the output responses of the nodes is derived and verified analytically. At the next step, an algorithm for sensor placement is proposed, which would enable the designer to detect and isolate any link failures across the network based on the observed jump discontinuities in the derivatives of the responses of a subset of nodes. These results are explained through elaborative examples.
description: 6 pages, 3 figures, IEEE Conference on Decision and Control, 2013
Review Essay: Torquato Tasso, Ed. and trans. Charles Jernigan and Irene Marchegiani Jones, Aminta: A Pastoral Play
Creators: name: Cavallo, Jo Ann
Publisher: name: Columbia University
Year: 2002
Subjects: Literature
Theater

description: Review of Aminta: A Pastoral Play by Torquato Tasso, Ed. and trans. Charles Jernigan and Irene Marchegiani Jones
Efficient multi port-based teleportation schemes
Creators: name: Studziński, Michał
name: Mozrzymas, Marek
name: Kopszak, Piotr
name: Horodecki, Michał
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this manuscript we analyse generalised port-based teleportation (PBT) schemes, allowing for transmitting more than one unknown quantum state (or a composite quantum state) in one go, where the state ends up in several ports at Bob's side. We investigate the efficiency of our scheme discussing both deterministic and probabilistic case, where parties share maximally entangled states. It turns out that the new scheme gives better performance than various variants of the optimal PBT protocol used for the same task. All the results are presented in group-theoretic manner depending on such quantities like dimensions and multiplicities of irreducible representations in the Schur-Weyl duality. The presented analysis was possible by considering the algebra of permutation operators acting on n systems distorted by the action of partial transposition acting on more than one subsystem. Considering its action on the n-fold tensor product of the Hilbert space with finite dimension, we present construction of the respective irreducible matrix representations, which are in fact matrix irreducible representations of the Walled Brauer Algebra. I turns out that the introduced formalism, and symmetries beneath it, appears in many aspects of theoretical physics and mathematics - theory of anti ferromagnetism, aspects of gravity theory or in the problem of designing quantum circuits for special task like for example inverting an unknown unitary.
Vortex States in Archimedean Tiling Pinning Arrays
Creators: name: Ray, D.
name: Reichhardt, C.
name: Reichhardt, C. J. Olson
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We numerically study vortex ordering and pinning in Archimedean tiling substrates composed of square and triangular plaquettes. The two different plaquettes become occupied at different vortex densities, producing commensurate peaks in the magnetization at non-integer matching fields. We find that as the field increases, in some cases the fraction of occupied pins can decrease due to the competition between fillings of the different plaquette types. We also identify a number of different types of vortex orderings as function of field at integer and non-integer commensurate fillings.
description: 16 pages, 12 postscript figures
On Yuzvinsky's lattice sheaf cohomology for hyperplane arrangements
Creators: name: Mücksch, Paul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52C35, 14F06, 13C10

description: We establish the relationship between the cohomology of a certain sheaf on the intersection lattice of a hyperplane arrangement introduced by Yuzvinsky and the cohomology of the coherent sheaf on punctured affine space, respectively projective space associated to the module of logarithmic vector fields along the arrangement. Our main result gives a Künneth formula connecting the cohomology theories, answering a question by Yoshinaga. This, in turn, provides a characterization of the projective dimension of the module of logarithmic vector fields and yields a new proof of Yuzvinsky's freeness criterion. Furthermore, our approach affords a new formulation of Terao's freeness conjecture and a more general problem.
description: 20 pages, v3 several small changes. Some parts of the introduction are rewritten with a new numbering of the main theorems. Also added a final section with concluding remarks
Talking Religion: The Conversion of Agricane in Boiardo's Orlando innamorato
Creators: name: Cavallo, Jo Ann
Publisher: name: Columbia University
Year: 2012
Subjects: Literature
Religion

description: Agricane’s final dialogue with Orlando under a starry night sky is one of the few episodes from the Orlando innamorato routinely included in Italian literature anthologies. Despite its status as “l’episodio forse più noto di tutto il poema boiardesco”, however, it has not received much critical attention. By taking account of the scene’s literary precedents and historical allusions, I aim to offer a new reading of Agricane’s eleventh-hour conversion.
Optoelectronic characterisation of twisted germanium sulfide nanowires with experimental observation of intrinsic ferroelectricity
Creators: name: Chowdhury, Tamaghna
name: Vasdev, Aastha
name: Sheet, Goutam
name: Rahman, Atikur
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the optoelectrical characterisation of Eshelby twisted Germanium sulfide (GeS) nanowires with first experimental observation of ferroelectric order at room temperature in GeS which is an otherwise centrosymmetric molecule. The chemical composition and structure of these nanowires were confirmed by various spectroscopic, microscopic and diffractive techniques. In addition, the nanowires were found to be stable over time. From the optoelectronic measurements we found that these p-type semiconducting GeS nanowires have up to two orders higher charge carrier mobility than GeS nanosheets and have sustainable, robust photo-switching property. The existence of room temperature ferroelectricity is confirmed by piezoresponse force microscopy which showed hysteresis and butterfly loop, characteristics of a ferroelectric material. Our observations reveal that the properties of twisted GeS nanowires can be harnessed in making efficient electric sensors, photodetectors, data memories and flexible electronics.
Review Essay: Alessandro Napoli, Il racconto e i colori: 'Storie' e 'cartelli' dell'Opera dei Pupi catanese
Creators: name: Cavallo, Jo Ann
Publisher: name: Columbia University
Year: 2004
Subjects: Literature
Theater
History

description: Book Review of Il racconto e i colori: 'Storie' e 'cartelli' dell'Opera dei Pupi catanese by Alessandro Napoli
Fannie Mae's National Housing Survey Monthly Home Purchase Sentiment Index (HPSI) and Key Indicators - April, 2024 (a subset of the complete monthly Fannie Mae National Housing Survey)
Creators: name: Foundation, Fannie Mae
Publisher: name: Roper Center for Public Opinion Research
Year: 2024

description: Economy on right or wrong track (3); personal financial situation (1); good or bad time to buy a house (3); good or bad time to sell a house (3); expect to move (1); direction house prices will go (3); direction rental prices will go (3); direction mortgage rates will go (1); difficulty getting a mortgage (1); home ownership (2).
Selection and Mid-infrared Spectroscopy of Ultraluminous Star-Forming Galaxies at z~2
Creators: name: Fang, Guanwen
name: Huang, Jia-Sheng
name: Willner, S. P.
name: Kong, Xu
name: Wang, Tao
name: Chen, Yang
name: Lin, Xuanbin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Starting from a sample of 24 \micron\ sources in the Extended Groth Strip, we use 3.6 to 8 \micron\ color criteria to select ultraluminous infrared galaxies (ULIRGs) at $z\sim2$. Spectroscopy from 20-38 \micron\ of 14 objects verifies their nature and gives their redshifts. Multi-wavelength data for these objects imply stellar masses ${>}10^{11}$ \Msun\ and star formation rates $\ge$410 \Msun yr$^{-1}$. Four objects of this sample observed at 1.6 \micron\ (rest-frame visible) with {\it HST}/WFC3 show diverse morphologies, suggesting that multiple formation processes create ULIRGs. Four of the 14 objects show signs of active galactic nuclei, but the luminosity appears to be dominated by star formation in all cases.
description: 33 pages, 13 figures, accepted by ApJ
Hermitian Matrix Definiteness from Quantum Phase Estimation
Creators: name: Gómez, Andrés
name: Mas, Javier
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An algorithm to classify a general Hermitian matrix according to its signature (positive semi-definite, negative or indefinite) is presented. It builds on the Quantum Phase Estimation algorithm, which stores the sign of the eigenvalues of a Hermitian matrix in one ancillary qubit. The signature of the matrix is extracted from the mean value of a spin operator in this single ancillary qubit. The algorithm is probabilistic, but it shows good performance, achieving 97% of correct classifications with few qubits. The computational cost scales comparably to the classical one in the case of a generic matrix, but improves significantly for restricted classes of matrices like $k$-local or sparse hamiltonians.
description: 19 pages, 8 figures, 2 algorithms
Regularity of solutions to quantum master equations: A stochastic approach
Creators: name: Mora, Carlos M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: Applying probabilistic techniques we study regularity properties of quantum master equations (QMEs) in the Lindblad form with unbounded coefficients; a density operator is regular if, roughly speaking, it describes a quantum state with finite energy. Using the linear stochastic Schrödinger equation we deduce that solutions of QMEs preserve the regularity of the initial states under a general nonexplosion condition. To this end, we develop the probabilistic representation of QMEs, and we prove the uniqueness of solutions for adjoint quantum master equations. By means of the nonlinear stochastic Schrödinger equation, we obtain the existence of regular stationary solutions for QMEs, under a Lyapunov-type condition.
description: Published in at http://dx.doi.org/10.1214/11-AOP692 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Review Essay: Frédérique Verrier, Le miroir des Amazones: Amazones, viragos et guerrières dans la littèrature italienne des XVe et XVIe siècles
Creators: name: Cavallo, Jo Ann
Publisher: name: Columbia University
Year: 2005
Subjects: Literature

description: Book Review of Le miroir des Amazones: Amazones, viragos et guerrières dans la littèrature italienne des XVe et XVIe siècles by Frédérique Verrier
Radiation and magnetic field effects on new semiconductor power devices for HL-LHC experiments
Creators: name: Fiore, S.
name: Abbate, C.
name: Baccaro, S.
name: Busatto, G.
name: Citterio, M.
name: Iannuzzo, F.
name: Lanza, A.
name: Latorre, S.
name: Lazzaroni, M.
name: Sanseverino, A.
name: Velardi, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The radiation hardness of commercial Silicon Carbide and Gallium Nitride power MOSFETs is presented in this paper, for Total Ionizing Dose effects and Single Event Effects, under gamma, neutrons, protons and heavy ions. Similar tests are discussed for commercial DC-DC converters, also tested in operation under magnetic field.
Special values of L-functions of one-motives over function fields
Creators: name: Geisser, Thomas H.
name: Suzuki, Takashi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: Primary: 11G40, Secondary: 14F20, 14F42

description: The purpose of this paper is to give a formula for the leading coefficient at $s=1$ of the $L$-function of one-motives over function fields in terms of Weil-étale cohomology, generalizing the Weil-étale version of the Birch and Swinnerton-Dyer conjecture in the authors' previous work. As a consequence we express the Tamagawa number of a torus introduced by Ono-Oesterlé in terms of Weil-étale cohomology, and reprove their Tamagawa number formula.
description: Accepted for publication in Journal f\"ur die reine und angewandte Mathematik. 26 pages
Localized states in passive and active phase-field-crystal models
Creators: name: Holl, Max Philipp
name: Archer, Andrew J.
name: Gurevich, Svetlana V.
name: Knobloch, Edgar
name: Ophaus, Lukas
name: Thiele, Uwe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The passive conserved Swift-Hohenberg equation (or phase-field-crystal [PFC] model) corresponds to a gradient dynamics for a single order parameter field related to density. It provides a simple microscopic description of the thermodynamic transition between liquid and crystalline states. In addition to spatially extended periodic structures, the model describes a large variety of steady spatially localized structures. In appropriate bifurcation diagrams the corresponding solution branches exhibit characteristic slanted homoclinic snaking. In an active PFC model, encoding for instance the active motion of self-propelled colloidal particles, the gradient dynamics structure is broken by a coupling between density and an additional polarization field. Then, resting and traveling localized states are found with transitions characterized by parity-breaking drift bifurcations. Here, we first briefly review the snaking behavior of localized states in passive and active PFC models before discussing the bifurcation behavior of localized states in systems of (i) two coupled passive PFC equations described by common gradient dynamics, (ii) two coupled passive PFC where the coupling breaks the gradient dynamics structure, and (iii) a passive PFC coupled to an active PFC.
description: submitted to the IMA Journal of Applied Mathematics' Special Issue on Homoclinic Snaking at 21, in memory of Patrick Woods
Extended rotating disks around post-AGB stars
Creators: name: Bujarrabal, V.
name: Alcolea, J.
name: Van Winckel, H.
name: Santander-Garcia, M.
name: Castro-Carrizo, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: There is a group of binary post-AGB stars that show a conspicuous NIR excess, usually assumed to arise from hot dust in very compact possibly rotating disks. These stars are surrounded by significantly fainter nebulae than the "standard", well studied protoplanetary and planetary nebulae (PPNe, PNe). We present high-sensitivity mm-wave observations of CO lines in 24 objects of this type. CO emission is detected in most observed sources and the line profiles show that the emissions very probably come from disks in rotation. We derive typical values of the disk mass between 1e-3 and 1e-2 Mo, about two orders of magnitude smaller than the (total) masses of "standard" PPNe. The high-detection rate (upper limits being in fact not very significant) clearly confirm that the NIR excess of these stars arises from compact disks in rotation, very probably the inner parts of those found here. Low-velocity outflows are also found in about eight objects, with moderate expansion velocities of ~ 10 km/s, to be compared with the velocities of about 100 km/s often found in "standard" PPNe. Except for two sources with complex profiles, the outflowing gas in our objects represents a minor nebular component. Our simple estimates of the disk typical sizes yields values ~ 0.5 - 1 arcsec, i.e. between 5e15 and 3e16 cm. Estimates of the linear momenta carried by the outflows, which can only be performed in a few well studied objects, also yield moderate values, compared with the linear momenta that can be released by the stellar radiation pressure (contrary, again, to the case of the very massive and fast bipolar outflows in "standard" PPNe, that are strongly overluminous). The mass and dynamics of nebulae around various classes of post-AGB stars differ very significantly, and we can expect the formation of PNe with very different properties.
description: 19 pages, 26 figures
Efficient Computer Simulation of Polymer Conformation. I. Geometric Properties of the Hard-Sphere Model
Creators: name: Stellman, Steven D.
name: Gans, Paul J.
Publisher: name: Columbia University
Year: 1972
Subjects: subject: Mathematics
subject: FOS: Mathematics
subject: Microchemistry
subject: Polymers

description: A system of efficient computer programs has been developed for simulating the conformations of macromolecules. The conformation of an individual polymer is defined as a point in conformation space, whose mutually orthogonal axes represent the successive dihedral angles of the backbone chain. The statistical-mechanical average of any property is obtained as the usual configuration integral over this space. A Monte Carlo method for estimating averages is used because of the impossibility of direct numerical integration. Monte Carlo corresponds to the execution of a Markoffian random walk of a representative point through the conformation space. Unlike many previous Monte Carlo studies of polymers, which sample conformation space indiscriminately, importance sampling increases efficiency because selection of new polymers is biased to reflect their Boltzmann probabilities in the canonical ensemble, leading to reduction of sampling variance and hence to greater accuracy! in given computing time. The simulation is illustrated in detail. Overall running time is proportional to n^(5/4), where n is the chain length. Results are presented for a hard-sphere linear polymer of n atoms, with free dihedral rotation, with n = 20-298. The fraction of polymers accepted in the importance sampling scheme, fA, is fit to a Fisher-Sykes attrition relation, giving an effective attrition constant of zero. fA is itself an upper bound to the partition function, Q, relative to the unrestricted walk. The mean-squared end-to-end distance and radius of gyration exhibit the expected exponential dependence, but with exponent for the radius of gyration significantly greater than that of the end-to-end distance. The 90% confidence limits calculated for both exponents did not include either 6/5 or 4/3, the lattice and zero-order perturbation values, respectively. A self-correcting scheme for generating coordinates free of roundoff error is given in an Appendix.
Rectangular knot diagrams classification with deep learning
Creators: name: Kauffman, L. H.
name: Russkikh, N. E.
name: Taimanov, I. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25,

description: In this article we discuss applications of neural networks to recognising knots and, in particular, to the unknotting problem. One of motivations for this study is to understand how neural networks work on the example of a problem for which rigorous mathematical algorithms for its solution are known. We represent knots by rectangular Dynnikov diagrams and apply neural networks to distinguish a given diagram class from the given finite families of topological types. The data presented to the program is generated by applying Dynnikov moves to initial samples. The significance of using these diagrams and moves is that in this context the problem of determining whether a diagram is unknotted is a finite search of a bounded combinatorial space.
description: 23 pages, 16 figures, LaTeX document
Regular multidimensional stationary time series
Creators: name: Szabados, Tamás
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistics Theory (math.ST)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 62M10, 60G10

description: The aim of this paper is to give a simpler, more usable sufficient condition to the regularity of generic weakly stationary time series. Also, this condition is used to show how regular processes satisfying these sufficient conditions can be approximated by a lower rank \emph{regular} process. The relevance of these issues is shown by the ever increasing presence of high-dimensional data in many fields lately, and because of this, low rank processes and low rank approximations are becoming more important. Moreover, regular processes are the ones which are completely influenced by random innovations, so they are primary targets both in the theory and applications.
description: 22 pages, corrected version
Sets of constant distance from a Jordan curve
Creators: name: Vellis, Vyron
name: Wu, Jang-Mei
Publisher: name: arXiv
Year: 2013
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: Primary 30C62, Secondary 57N40

description: We study the $ε$-level sets of the signed distance function to a planar Jordan curve $Γ$, and ask what properties of $Γ$ ensure that the $ε$-level sets are Jordan curves, or uniform quasicircles, or uniform chord-arc curves for all sufficiently small $ε$. Sufficient conditions are given in term of a scaled invariant parameter for measuring the local deviation of subarcs from their chords. The chordal conditions given are sharp.
Temporal Representation Learning on Monocular Videos for 3D Human Pose Estimation
Creators: name: Honari, Sina
name: Constantin, Victor
name: Rhodin, Helge
name: Salzmann, Mathieu
name: Fua, Pascal
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper we propose an unsupervised feature extraction method to capture temporal information on monocular videos, where we detect and encode subject of interest in each frame and leverage contrastive self-supervised (CSS) learning to extract rich latent vectors. Instead of simply treating the latent features of nearby frames as positive pairs and those of temporally-distant ones as negative pairs as in other CSS approaches, we explicitly disentangle each latent vector into a time-variant component and a time-invariant one. We then show that applying contrastive loss only to the time-variant features and encouraging a gradual transition on them between nearby and away frames while also reconstructing the input, extract rich temporal features, well-suited for human pose estimation. Our approach reduces error by about 50% compared to the standard CSS strategies, outperforms other unsupervised single-view methods and matches the performance of multi-view techniques. When 2D pose is available, our approach can extract even richer latent features and improve the 3D pose estimation accuracy, outperforming other state-of-the-art weakly supervised methods.
description: Accepted in "IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI)"
High posterior density ellipsoids of quantum states
Creators: name: Ferrie, Christopher
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Regions of quantum states generalize the classical notion of error bars. High posterior density (HPD) credible regions are the most powerful of region estimators. However, they are intractably hard to construct in general. This paper reports on a numerical approximation to HPD regions for the purpose of testing a much more computationally and conceptually convenient class of regions: posterior covariance ellipsoids (PCEs). The PCEs are defined via the covariance matrix of the posterior probability distribution of states. Here it is shown that PCEs are near optimal for the example of Pauli measurements on multiple qubits. Moreover, the algorithm is capable of producing accurate PCE regions even when there is uncertainty in the model.
description: TL;DR version: computationally feasible region estimators
Convergence rate for weighted polynomial approximation on the real line
Creators: name: Kononova, Anna
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: In this note we study a quantitative version of Bernstein's approximation problem when the polynomials are dense in weighted spaces on the real line completing a result of S.~N.~Mergelyan (1960). We estimate in the logarithmic scale the error of the weighted polynomial approximation of the Cauchy kernel.
description: 16 pages
Review Essay: Matteo Maria Boiardo, trans. Andrea di Tommaso, Amorum Libri: The Lyric Poems of Matteo Maria Boiardo
Creators: name: Cavallo, Jo Ann
Publisher: name: Columbia University
Year: 1994
Subjects: Literature

description: Book Review of Amorum Libri: The Lyric Poems of Matteo Maria Boiardo, trans. Andrea di Tommaso
U-Noise: Learnable Noise Masks for Interpretable Image Segmentation
Creators: name: Koker, Teddy
name: Mireshghallah, Fatemehsadat
name: Titcombe, Tom
name: Kaissis, Georgios
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deep Neural Networks (DNNs) are widely used for decision making in a myriad of critical applications, ranging from medical to societal and even judicial. Given the importance of these decisions, it is crucial for us to be able to interpret these models. We introduce a new method for interpreting image segmentation models by learning regions of images in which noise can be applied without hindering downstream model performance. We apply this method to segmentation of the pancreas in CT scans, and qualitatively compare the quality of the method to existing explainability techniques, such as Grad-CAM and occlusion sensitivity. Additionally we show that, unlike other methods, our interpretability model can be quantitatively evaluated based on the downstream performance over obscured images.
description: ICIP 2021. Revision: corrected affiliation and reference
Multi-Time Formulation of Pair Creation
Creators: name: Petrat, Sören
name: Tumulka, Roderich
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In a recent work [8], we have described a formulation of a model quantum field theory in terms of a multi-time wave function and proposed a suitable system of multi-time Schroedinger equations governing the evolution of that wave function. Here, we provide further evidence that multi-time wave functions provide a viable formulation of relevant quantum field theories by describing a multi-time formulation, analogous to the one in [8], of another model quantum field theory. This model involves three species of particles, say x-particles, anti-x-particles, and y-particles, and postulates that a y-particle can decay into a pair consisting of an x and an anti-x particle, and that an x-anti-x pair, when they meet, annihilate each other creating a y-particle. (Alternatively, the model can also be interpreted as representing beta decay.) The wave function is a multi-time version of a time-dependent state vector in Fock space (or rather, the appropriate product of Fock spaces) in the particle-position representation. We write down multi-time Schroedinger equations and verify that they are consistent, provided that an even number of the three particle species involved are fermionic.
description: 14 pages, LaTex
Robust Zero Modes in Disordered Two-Dimensional Honeycomb Lattice with Kekulé Bond Ordering
Creators: name: Kawarabayashi, Tohru
name: Inoue, Yuya
name: Itagaki, Ryo
name: Hatsugai, Yasuhiro
name: Aoki, Hideo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Robustness of zero-modes of two-dimensional Dirac fermions is examined numerically for the honeycomb lattice in the presence of Kekulé bond ordering. The split $n=0$ Landau levels in a magnetic field as well as the zero-modes generated by topological defects in the Kekulé ordering are shown to exhibit anomalous robustness against disorder when the chiral symmetry is respected.
description: 11 pages, 9 figures, submitted to the proceedings of Localisation 2020
Dynamics of Land Use in Fast Growth Areas
Creators: name: Zeimetz, Kathryn A.
name: Dillon, Elizabeth
name: Hardy, Ernest E.
name: Otte, Robert C.
name: Zeimetz, Kathryn A.
name: Dillon, Elizabeth
name: Hardy, Ernest E.
name: Otte, Robert C.
Publisher: name: Unknown
Year: 1976
Subjects: subject: Community/Rural/Urban Development
subject: Land Economics/Use
subject: Land use change
subject: Urban land
subject: Idle land
subject: Cropland
subject: Rapid growth areas
subject: Airphoto interpretation

description: Land use and land use changes between 1961 and 1970 were interpreted from Agricultural Stabilization and Conservation Service (ASCS) 1:20,000 scale photography for 53 rapid-growth counties. In these counties, which experienced about 20 percent of the total U.S. population increase between 1960 and 1970, urban land accounted for 16 percent of the area in 1970, up from 13 percent in 1961. Of land developed for urban use in the 53-county aggregate between 1961 and 1970, 35 percent had been cropland, 28 percent forest, and 33 percent open idle. Regionally, the amount of urban development on various types of rural land differed considerably. While total land in rural uses remained relatively the same over the period, shifts among rural uses were an important aspect of land use change. The average amount of land urbanized per person increase in population for the 53-county total was .173 acres. While this per capita ratio varied regionally, in all regions new urban development occurred at a higher density than had previous urban development.
Compatibility waves drive crystal growth on patterned substrates
Creators: name: Neuhaus, Tim
name: Schmiedeberg, Michael
name: Löwen, Hartmut
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We explore the crystallization in a colloidal monolayer on a structured template starting from a few-particle nucleus. The competition between the substrate structure and that of the growing crystal induces a new crystal growth scenario. Unlike with the crystal growth in the bulk where a well-defined and connected crystal-fluid interface grows into the fluid, we identify a mechanism where a "compatibility wave" of the prescribed nucleus with the underlying substrate structure dictates the growth direction and efficiency. The growth process is strongly anisotropic and proceeds via transient island formation in front of an initial solid-fluid interface. We demonstrate the validity of this compatibility wave concept for a large class of substrate structures including a square-lattice and a quasicrystalline pattern. Dynamical density functional theory which provides a microscopic approach to the crystallization process is employed for colloidal hard spheres. Our predictions can be verified in experiments on confined colloids and also bear consequences for molecular crystal growth on structured substrates.
description: 11 pages, 4 figures
DPIVE: A Regionalized Location Obfuscation Scheme with Personalized Privacy Levels
Creators: name: Zhang, Shun
name: Lan, Pengfei
name: Duan, Benfei
name: Chen, Zhili
name: Zhong, Hong
name: Xiong, Neal N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: The popularity of cyber-physical systems is fueling the rapid growth of location-based services. This poses the risk of location privacy disclosure. Effective privacy preservation is foremost for various mobile applications. Recently, geo-indistinguishability and expected inference error are proposed for limiting location leakages. In this paper, we argue that personalization means regionalization for geo-indistinguishability, and we propose a regionalized location obfuscation mechanism called DPIVE with personalized utility sensitivities. This substantially corrects the differential and distortion privacy problem of PIVE framework proposed by Yu et al. on NDSS 2017. We develop DPIVE with two phases. In Phase I, we determine disjoint sets by partitioning all possible positions such that different locations in the same set share the Protection Location Set (PLS). In Phase II, we construct a probability distribution matrix in which the rows corresponding to the same PLS have their own sensitivity of utility (PLS diameter). Moreover, by designing QK-means algorithm for more search space in 2-D space, we improve DPIVE with refined location partition and present fine-grained personalization, enabling each location to have its own privacy level endowed with a customized privacy budget. Experiments with two public datasets demonstrate that our mechanisms have the superior performance, typically on skewed locations.
description: 26 pages, 15 figures
The Pathways of Knowledge in Boiardo and Ariosto: The Case of Rodamonte
Creators: name: Cavallo, Jo Ann
Publisher: name: Columbia University
Year: 2002
Subjects: Literature

description: How do we come to know? What can be known? How can true knowledge be distinguished from belief and opinion? What are the effects of knowledge? How does knowledge shape the course of our actions? These are some of the questions that philosophers were asking in fifteenth and
sixteenth-century Italy.The answers would have differed depending on whether one adhered to scholastic Aristotelianism, Neoplatonism, "nature philosophies," or Skepticism, but all schools of thought were engaged in discussions about the nature of knowledge. Philosophers, moreover, were not the only ones interested in the process of knowledge acquisition and the relation of knowledge to action. In this essay I focus on how the poets Matteo Maria Boiardo and Lodovico Ariosto develop their thoughts on the subject in their romance epics, Orlando innamorato and Orlando furioso. My intention is not to fit them into any particular philosophical movement (although correspondences will be noted when relevant), but rather to show that both poets were deeply aware of the questions surrounding the issue of knowledge and that they provided their own answers through their fiction.
Hartree approximation in curved spacetimes revisited II: The semiclassical Einstein equations and de Sitter self-consistent solutions
Creators: name: Nacir, Diana L. López
name: Mazzitelli, Francisco D.
name: Trombetta, Leonardo G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the semiclassical Einstein equations (SEE) in the presence of a quantum scalar field with self-interaction $λϕ^4$. Working in the Hartree truncation of the two-particle irreducible (2PI) effective action, we compute the vacuum expectation value of the energy-momentum tensor of the scalar field, which act as a source of the SEE. We obtain the renormalized SEE by implementing a consistent renormalization procedure. We apply our results to find self-consistent de Sitter solutions to the SEE in situations with or without spontaneous breaking of the $Z_2$-symmetry.
description: 32 pages, 4 figures
Non-integer (or fractional) power model of a viral spreading: application to the COVID-19
Creators: name: Oustaloup, Alain
name: Levron, François
name: Victor, Stéphane
name: Dugard, Luc
Publisher: name: arXiv
Year: 2021
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Medical Physics (physics.med-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: This paper proposes a very simple deterministic mathematical model, which, by using a power-law, is a \emph{non-integer power model} (or \emph{fractional power model (FPM)}). Such a model, in non-integer power of time, namely $t^m$ up to constants, enables representing at each day, with a good precision, the totality of the contaminated individuals. Despite being enriched with knowledge through an internal structure based on a geometric sequence "with variable ratio", the model (in its non-integer representation) has only three parameters, among which the non-integer power, $m$, that determines on its own, according to its value, an aggravation or an improvement of the viral spreading. Its simplicity comes from the power-law, $t^m$, which simply expresses the singular dynamics of the operator of non-integer differentiation or integration, of high parametric compactness, that governs diffusion phenomena and, as shown in this paper, the spreading phenomena by contamination. The proposed model is indeed validated with the official data of Ministry of Health on the COVID-19 spreading. Used in prediction, it well enables justifying the choice of a lockdown, without which the spreading would have highly worsened. The comparison of this model in $t^m$ with two known models having the same number of parameters, well shows that its representativity of the real data is better or more general. Finally, in a more fundamental context and particularly in terms of complexity and simplicity, a self-filtering action enables showing the compatibility between the \emph{internal complexity} that the internal structure and its stochastic behavior present, and the \emph{global simplicity} that the model in $t^m$ offers in a deterministic manner: it is true that the non-integer power of a power-law is well a marker of complexity.
The Children’s Learning Center
Creators: name: Anekwe, Obiora
Publisher: name: Voices in Bioethics
Year: 2014

description: Your smallest decision can make the biggest difference in learning. Recently, I became a member of the New York City Teaching Fellows Program’s 25th cohort. My area of specialization is in special education. More than half of this year’s teaching fellows consist of prospective teachers in training in the field of special education, and during this summer, my fellow classmates and I participated in a site visit to the Children’s Learning Center, the United Cerebral Palsy Association of Nassau County, Inc. in Roosevelt, New York. As stated on the agency’s website, the “United Cerebral Palsy Association of Nassau County, Inc. (UCPN) is an independent, not-for-profit health agency serving over 1800 children and adults with cerebral palsy, developmental and other disabilities.” Founded in 1948, the Association operates a comprehensive Treatment and Rehabilitation Center that has earned international recognition for innovative and high quality programs. In a tour of the school, I observed a montage of framed photographs featuring former heavyweight boxing champion Muhammad Ali, who once visited the school 15 years ago. Ali was scheduled to visit for 30 minutes. Instead, he decided to stay for 8 hours. His visit reminds us that the smallest decision affecting children often makes the biggest difference in a child’s education. I think that visually seeing throughout the school’s hallways framed photographs of Ray Charles and Christopher Reeves – icons who positively coped with their own physical limitations – helps these students with cerebral palsy know that they can also overcome any challenge. The majority of students who attend the school are non-residential. Many of the toys and communicative devices have been adapted in order to meet their individual learning and social needs. Most impressive is the fact that, although many students at the Children’s Learning Center may have cognitive and/or physical needs, communication devices such as computers, toys, and machines are augmented to enhance effective and transferable learning. Even the gymnasium was designed in order to adapt to the physical needs of students. The Children’s Learning Center stresses the concept of learning by doing in addition to the belief that in every learning activity a goal exists. The best example I observed at the Children’s Learning Center that greatly emphasized this learning strategy was art therapy. In essence, art therapy increased the self-confidence and efficacy of students because it centered on the practice of displaying their artwork throughout the art therapy classroom and hallways. As I reflect back on my site visit to the Children’s Learning Center, I draw from the words of Miyamoto Musashi: “The journey of a thousand miles begins with one step.”
description: Voices in Bioethics, Archives (2014-2015)