cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Covariant Bardeen Perturbation Formalism
Creators: name: Vitenti, S. D. P.
name: Falciano, F. T.
name: Pinto-Neto, N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In a previous work we obtained a set of necessary conditions for the linear approximation in cosmology. Here we discuss the relations of this approach with the so called covariant perturbations. It is often argued in the literature that one of the main advantages of the covariant approach to describe cosmological perturbations is that the Bardeen formalism is coordinate dependent. In this paper we will reformulate the Bardeen approach in a completely covariant manner. For that, we introduce the notion of pure and mixed tensors, which yields an adequate language to treat both perturbative approaches in a common framework. We then stress that in the referred covariant approach one necessarily introduces an additional hyper-surface choice to the problem. Using our mixed and pure tensors approach, we were able to construct a one-to-one map relating the usual gauge dependence of the Bardeen formalism with the hyper-surface dependence inherent to the covariant approach. Finally, through the use of this map, we define full non-linear tensors that at first order correspond to the three known gauge invariant variables $Φ$, $Ψ$ and $Ξ$, which are simultaneously foliation and gauge invariant. We then stress that the use of the proposed mixed tensors allows one to construct simultaneously gauge and hyper-surface invariant variables at any order.
description: 15 pages, no figures, revtex4-1, accepted for publication in PRD, typos fixed, improved discussion about higher order gauge and foliation invariance
Geometric Results for Compressible Magnetohydrodynamics
Creators: name: Arter, Wayne
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Recently, compressible magnetohydrodynamics (MHD) has been elegantly formulated in terms of Lie derivatives. This paper exploits the geometrical properties of the Lie bracket to give new insights into the properties of compressible MHD behaviour, both with and without feedback of the magnetic field on the flow. These results are expected to be useful for the solution of MHD equations in both tokamak fusion experiments and space plasmas.
description: 16 pages, 1 figure
Minimal Supergravity Models of Inflation
Creators: name: Ferrara, Sergio
name: Kallosh, Renata
name: Linde, Andrei
name: Porrati, Massimo
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a superconformal master action for a class of supergravity models with one arbitrary function defining the Jordan frame. It leads to a gauge-invariant action for a real vector multiplet, which upon gauge fixing describes a massive vector multiplet, or to a dual formulation with a linear multiplet and a massive tensor field. In both cases the models have one real scalar, the inflaton, naturally suited for single-field inflation. Vectors and tensors required by supersymmetry to complement a single real scalar do not acquire vev's during inflation, so there is no need to stabilize the extra scalars which are always present in the theories with chiral matter multiplets. The new class of models can describe any inflaton potential which vanishes at its minimum and grows monotonically away from the minimum. In this class of supergravity models one can fit any desirable choice of inflationary parameters n_s and r.
description: 25 pages, 5 figures, the version to appear in Phys. Rev. D
On the common Point Spectrum of pairs of Self-Adjoint Extensions
Creators: name: Posilicano, Andrea
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Given two different self-adjoint extensions of the same symmetric operator, we analyse the intersection of their point spectra. Some simple examples are provided.
description: Two references added. To appear in Methods of Functional Analysis and Topology, special issue dedicated to Vladimir Koshmanenko on the occasion of his 70th birthday
title: Programm und Ikonographie in den Publikationen des frühen Leopoldina-Umfeldes, 1652–1700
Creators: name: Eckart, Wolfgang
Publisher: name: MyCoRe Community
Year: 2022
Subjects: subject: Leopoldina
subject: Umfeld
subject: Publikationen
subject: 1652-1700
subject: 000
subject: 900

description: Die hier publizierte PowerPoint-Fassung des Vortrags von Wolfgang U. Eckart zur von ihm mitorganisierten Frühjahrstagung des Leopoldina-Studienzentrums vom 9. bis 10. April 2018 in Halle (Saale) zum Thema: „Strategien der Kommunikation von Naturwissen und Medizin. Zu Zeitschriften gelehrter Akademien in der Frühen Neuzeit“ konnte der Vortragende aus gesundheitlichen Gründen nicht mehr in eine Textform bringen, so dass der Vortrag jetzt unter Verwendung der seinerzeit vorbereiteten PowerPoint-Folien mit markanten Abbildungen und inhaltlich gut nachvollziehbaren Erklärungen dokumentiert wird.
description: Strategien der Kommunikation von Naturwissen und Medizin: Zeitschriften gelehrter Akademien in der frühen Neuzeit, p. 13
Interplay between Kondo and Majorana interactions in quantum dots
Creators: name: Cheng, Meng
name: Becker, Michael
name: Bauer, Bela
name: Lutchyn, Roman M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the properties of a quantum dot coupled to a one-dimensional topological superconductor and a normal lead and discuss the interplay between Kondo and Majorana-induced couplings in quantum dot. The latter appears due to the presence of Majorana zero-energy modes localized at the ends of the one-dimensional superconductor. We investigate the phase diagram of the system as a function of Kondo and Majorana interactions using a renormalization-group analysis, a slave-boson mean-field theory and numerical simulations using the density-matrix renormalization group method. We show that, in addition to the well-known Kondo fixed point, the system may flow to a new fixed point controlled by the Majorana-induced coupling which is characterized by non-trivial correlations between a localized spin on the dot and the fermion parity of the topological superconductor and normal lead. We compute several measurable quantities such as differential tunneling conductance and impurity spin susceptibility which highlight some peculiar features characteristic to the Majorana fixed point.
description: Published version
Chiral transition of fundamental and adjoint quarks
Creators: name: Capdevilla, R. M.
name: Doff, A.
name: Natale, A. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The chiral symmetry breaking transition of quarks in the fundamental and adjoint representation is studied in a model where the gap equation contains two contributions, one containing a confining propagator and another corresponding to the exchange of one-dressed dynamically massive gluons. When quarks are in the fundamental representation the confinement effect dominates the chiral symmetry breaking while the gluon exchange is suppressed due to the dynamical gluon mass effect in the propagator and coupling constant. In this case the chiral and deconfinement transition temperatures are approximately the same. For quarks in the adjoint representation, due to the larger Casimir eigenvalue, the gluon exchange is operative and the chiral transition happens at a larger temperature than the deconfinement one.
description: 12 pages, 1 figure, improved discussion
5 Briefe an [Hans Caspar] Hirzel
Brief an Hirzel ...
Creators: name: Spalding, Johann Joachim
Publisher: name: [s.n.]
Year: 1746

description: von J[ohann] J[oachim] Spalding
description: Davon: 1 Brief (Abschrift) von Spalding an Sulzer, dat. 16.10.1762
Fiscal decentralization and regional budgets’ changing roles: a comparative case study of Russia and China
Creators: name: Kadochnikov, Denis V.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: An important aspect of economic reforms in Russia and China over the last several decades has been the transformation of their public finances and, in particular, the revision of the status and the capacities of the two countries’ regional budgets. In search of effective approaches to the division of revenues and expenditures between national and subnational authorities, the Russian Federation and the People’s Republic of China have chosen different paths. While China’s central authorities have delegated more responsibilities and provided more resources to local governments, Russian regions’ role in the budget system have diminished. These differences are outlined and explained.
Type-I cosmic string network
Creators: name: Hiramatsu, Takashi
name: Sendouda, Yuuiti
name: Takahashi, Keitaro
name: Yamauchi, Daisuke
name: Yoo, Chul-Moon
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the network of Type-I cosmic strings using the field-theoretic numerical simulations in the Abelian-Higgs model. For Type-I strings, the gauge field plays an important role, and thus we find that the correlation length of the strings is strongly dependent upon the parameter β, the ratio between the self-coupling constant of the scalar field and the gauge coupling constant, namely, β=λ/2e^2. In particular, if we take the cosmic expansion into account, the network becomes densest in the comoving box for a specific value of βfor β<1.
description: 13 pages, 9 figures, PRD accepted version
Constraints on Majorana Dark Matter from a Fourth Lepton Family
Creators: name: Hapola, Tuomas
name: Jarvinen, Matti
name: Kouvaris, Chris
name: Panci, Paolo
name: Virkajarvi, Jussi
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the possibility of dark matter in the form of heavy neutrinos from a fourth lepton family with helicity suppressed couplings such that dark matter is produced thermally via annihilations in the early Universe. We present all possible constraints for this scenario coming from LHC and collider physics, underground direct detectors, neutrino telescopes, and indirect astrophysical searches. Although we embed the WIMP candidate within a model of composite dynamics, the majority of our results are model independent and applicable to all models where heavy neutrinos with suppressed couplings account for the dark matter abundance.
description: 24 pages, 2 figures. v2: some clarifications and some references added; new paragraph and new line in the plot with the latest LUX results; matches version published on JCAP
Notizblatt
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1790

description: von Unbekannt
description: Notizblatt zur Chronologie folgender Briefe: L Ia 680:Bl.200-L Ia 680:Bl.215
description: Öffentliche Bibliothek der Universität Basel
description: Deutsch
Brief an Heinrich Petri
Creators: name: Cousin, Gilbert
Publisher: name: [s.n.]
Year: 1562

description: Dringende Bitte, den Lucan zu fördern: Oporin soll ihn rasch drucken.- Von anderen Büchern, die P. bald zugehen werden: eine Reihe philol. Sachen.- S. studiert tüchtig.- Von der traurigen Lage Frankreichs kann er nicht viel sagen: die Eilfertigkeit, mit der man einigen will, ist nichts. Man sollte Konvente zur Besserung der Leute abhalten etc.- Flüchtlinge in N.- Wüsste gern über die Lage in Deutschland und Schweiz Bescheid.- Lange Bücherliste. (Gustav Meyer, 1946/1947)
description: von Gilbertus Cogn[atus]
description: Abschrift: G2 II 42, fol.4r/16r
description: Lateinisch
description: Verzeichnung=Description=Inventaire Mai 2013 Vollständige Rekatalogisierung nach Standortverzeichnis G2 I 1/G2 II 80 und Briefkatalog
Discrete mKdV and Discrete Sine-Gordon Flows on Discrete Space Curves
Creators: name: Inoguchi, Jun-ichi
name: Kajiwara, Kenji
name: Matsuura, Nozomu
name: Ohta, Yasuhiro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 53A04, 37K25, 37K10, 35Q10, 65D17

description: In this paper, we consider the discrete deformation of the discrete space curves with constant torsion described by the discrete mKdV or the discrete sine-Gordon equations, and show that it is formulated as the torsion-preserving equidistant deformation on the osculating plane which satisfies the isoperimetric condition. The curve is reconstructed from the deformation data by using the Sym-Tafel formula. The isoperimetric equidistant deformation of the space curves does not preserve the torsion in general. However, it is possible to construct the torsion-preserving deformation by tuning the deformation parameters. Further, it is also possible to make an arbitrary choice of the deformation described by the discrete mKdV equation or by the discrete sine-Gordon equation at each step. We finally show that the discrete deformation of discrete space curves yields the discrete K-surfaces.
description: 31 pages, 3 fugures
Gedicht auf den Tod des Vaters von de Catt
Creators: name: Castillon, Giovanni Francesco Mauro Melchiorre
name: Catt, Henri de
Publisher: name: [s.n.]
Year: 1780

description: S. 279 unten: Brief an [Johann Heinrich Lambert] von [Henri Alexandre] de Catt (5 Zeilen Autogr., [Potsdam um 1765])
description: [Giovanni Francesco Mauro Melchiore Salvemini] de Castillon
description: Öffentliche Bibliothek der Universität Basel
description: Lateinisch, Französisch
description: Verzeichnung=Description=Inventaire 2014 HAN-Katalogisierungsregeln
Nonlocal continuous variable correlations and violation of Bell's inequality for light beams with topological singularities
Creators: name: Chowdhury, Priyanka
name: Majumdar, A. S.
name: Agarwal, G. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider optical beams with topological singularities which possess Schmidt decomposition and show that such classical beams share many features of two mode entanglement in quantum optics. We demonstrate the coherence properties of such beams through the violations of Bell inequality for continuous variables using the Wigner function. This violation is a consequence of correlations between the $(x, p_x)$ and $(y, p_y)$ spaces which mathematically play the same role as nonlocality in quantum mechanics. The Bell violation for the LG beams is shown to increase with higher orbital angular momenta $l$ of the vortex beam. This increase is reminiscent of enhancement of nonlocality for many particle Greenberger-Horne-Zeilinger states or for higher spins. The states with large $l$ can be easily produced using spatial light modulators.
description: 6 pages and 2 figures
Brief an Gottfried Kirch
Creators: name: Caesar, Johann
Publisher: name: [s.n.]
Year: 1677

description: von Joh[ann] Caesar
description: Entstehungsdatum ist nicht eindeutig zu entziffern
description: Öffentliche Bibliothek der Universität Basel
description: Deutsch
description: Verzeichnung=Description=Inventaire 2014 HAN-Katalogisierungsregeln
Tendencias de los enfoques cualitativos y cuantitativos en artículos publicados en Scientific Library Online (SciELO)
Creators: name: Rebolledo Carreño, Alexis E.
name: Méndez-Bustos, Pablo
name: Cárcamo Vásquez, Héctor
Publisher: name: figshare
Year: 2022
Subjects: Sociological methodology and research methods

description: En este artículo se rinde cuenta del análisis de los procedimientos utilizados en la investigación en ciencias de la educación. Para ello se formularon las siguientes preguntas: ¿De qué manera se presentan dichos procedimientos? ¿Cuáles son las estrategias más frecuentemente declaradas? ¿Cuáles han sido las tendencias predominantes en los últimos años?. Se aspira develar la trayectoria trazada por los procedimientos aplicados en el levantamiento y análisis de datos. Para tal propósito, se aplicaron técnicas bibliométricas utilizando información secundaria, considerando específicamente revistas indexadas en la Scientific Library Online (SCIELO) y en cuya misión, como objeto general, declaran a las ciencias de la educación. La metodología utilizada fue cuantitativa de alcance descriptivo. Se indagó respecto a tres ejes fundamentales (metodología, relevamiento de información y análisis de los datos). Entre los resultados obtenidos se encontró que los artículos revisados presentan una coherencia interna respecto a las decisiones adoptadas de acuerdo a los ejes declarados; además, quedó en evidencia la fuerte presencia de investigaciones cuantitativas y cualitativas, pero no de artículos que declaren la opción metodológica mixta (cuantitativa-cualitativa).
Nonparametric independence screening and structure identification for ultra-high dimensional longitudinal data
Creators: name: Cheng, Ming-Yen
name: Honda, Toshio
name: Li, Jialiang
name: Peng, Heng
Publisher: name: arXiv
Year: 2013
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences
subject: 62G08 (Primary)

description: Ultra-high dimensional longitudinal data are increasingly common and the analysis is challenging both theoretically and methodologically. We offer a new automatic procedure for finding a sparse semivarying coefficient model, which is widely accepted for longitudinal data analysis. Our proposed method first reduces the number of covariates to a moderate order by employing a screening procedure, and then identifies both the varying and constant coefficients using a group SCAD estimator, which is subsequently refined by accounting for the within-subject correlation. The screening procedure is based on working independence and B-spline marginal models. Under weaker conditions than those in the literature, we show that with high probability only irrelevant variables will be screened out, and the number of selected variables can be bounded by a moderate order. This allows the desirable sparsity and oracle properties of the subsequent structure identification step. Note that existing methods require some kind of iterative screening in order to achieve this, thus they demand heavy computational effort and consistency is not guaranteed. The refined semivarying coefficient model employs profile least squares, local linear smoothing and nonparametric covariance estimation, and is semiparametric efficient. We also suggest ways to implement the proposed methods, and to select the tuning parameters. An extensive simulation study is summarized to demonstrate its finite sample performance and the yeast cell cycle data is analyzed.
description: Published in at http://dx.doi.org/10.1214/14-AOS1236 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Inclusions of Waterman-Shiba spaces into generalized Wiener classes
Creators: name: Hormozi, Mahdi
name: Prus-Wisniowski, Franciszek
name: Rosengren, Hjalmar
Publisher: name: arXiv
Year: 2013
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 26A15, 26A45

description: The characterization of the inclusion of Waterman-Shiba spaces $ΛBV^{(p)}$ into generalized Wiener classes of functions $BV(q;\,δ)$ is given. It uses a new and shorter proof and extends an earlier result of U. Goginava.
description: 5 pages
Brouillard journalier de Lauffenbourg, appartenant à Perrollas Cartier et Compagnie
Creators: name: Perrollaz, Cartier & Co
Publisher: name: [s.n.]
Year: 1805

description: Darin: Lose Einlage in separatem Umschlag; auf S.165 eine sich auf das Jahr 1787 beziehende Ein- bzw. Übertragung
description: Französisch
description: Verzeichnung=Description=Inventaire 2014 ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Sebastian Preher
Deriving forest plot inventory parameters using terrestrial laser scanning in the tropical rainforest of Malaysia
Creators: name: Kalwar, Om P.P.
name: Hussin, Yousif A.
name: Weir, Michael J.C.
name: C.A.J.M. De Bie
name: Karna, Yogendra
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Plant Biology

description: Forest inventory parameters, in particular DBH (diameter at breast height) and tree height, can be used to accurately estimate above-ground carbon, which is an important indicator of forest productivity and sequestration of carbon. This study demonstrates and tests a method to automatically and manually derive forest inventory parameters for estimating above-ground carbon (AGC) using a Terrestrial Laser Scanner (TLS). The study was conducted in the Royal Belum State Park of Peninsular Malaysia by establishing 24 circular inventory sample plots of 0.05 ha. A RIEGL VZ-400 TLS system was used to acquire point cloud data of the sample plots through multiple scanning, and these data were further pre-processed and co-registered using the RiSCAN PRO software. The DBH and tree height for each tree within the plots were manually measured using a distance measurement tool in RiSCAN PRO and automatically derived from Computree software using a tree segmentation approach. The inventory parameters derived from TLS were compared with the field measurements for calculating the AGC using an allometric equation. On average, 89% and 90% of the sampled trees were detected from the point cloud data of the plots using the manual and automatic detection methods, respectively. The mean values of R 2 (coefficient of determination) and RMSE (Root Mean Square Error) for manually measured DBH and tree height across the plots were 0.95 and 2.70 cm, and 0.77 and 2.96 m, respectively. We also obtained an average value of 0.86 and 2.47 cm, and 0.51 and 3.15 m for R 2 and RMSE, respectively between field-measured and automatically derived DBH and tree height from TLS data across all the sample plots of the study area. Our method provides clear evidence that TLS has the potential to derive forest inventory parameters, which can be used to estimate above-ground carbon in the tropical rainforest accurately.
Anomalous Hall Response in Two Dimensional Topological Insulators due to the Stark Effect
Creators: name: Cortijo, Alberto
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: It is shown that the presence of matrix dipole moments induced by external electric fields can modify the Hall response in two dimensional Topological insulators. In the case of the Quantum Anomalous Hall effect the induced transverse currents acquire an extra term being proportional to the Hall conductance and the time derivative of the applied electric field. In the case of the Quantum Spin Hall effect both a spin and charge transverse currents appear simultaneously. In virtue of the bulk-edge correspondence the coupling between the chiral edge channels and the electromagnetic field changes allowing for an extra non minimal coupling term. Both effects can be measured through transport and tunnelling experiments.
description: Version published in PRB
Tagebuch 3
Creators: name: Sandreuter, Hans
Publisher: name: [s.n.]
Year: 1890

description: Hans Sandreuter
description: Öffentliche Bibliothek der Universität Basel
description: Deutsch
description: Digitalisierung=Digitization=Numérisation September 2022 TIFF
description: Verzeichnung=Description=Inventaire Juli 2022 HAN-Katalogisierungsregeln ben
The entropy vector formalism and the structure of multidimensional entanglement in multipartite systems
Creators: name: Huber, Marcus
name: Perarnau-Llobet, Martí
name: de Vicente, Julio I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We review and generalize the recently introduced framework of entropy vectors for detecting and quantifying genuine multipartite entanglement in high dimensional multicomponent quantum systems. We show that these ideas can be extended to discriminate among other forms of multipartite entanglement. In particular, we develop methods to test whether density matrices are: decomposable, i.\ e.\ separable with respect to certain given partitions of the subsystems; $k$-separable, i.\ e.\ separable with respect to $k$ partitions of the subsystems; $k$-partite entangled, i.e. there is entanglement among a subset of at least $k$ parties. We also discuss how to asses the dimensionality of entanglement in all these cases.
description: 8 pages, 5 figures
Spatial aware probabilistic multi-kernel collaborative representation for hyperspectral image classification using few labelled samples
Creators: name: Karaca, Ali Can
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Spatial-spectral hyperspectral image classification methods have gained increasing attention over the past decade. Although most of the methods achieve high performances in classification, they may give unreliable performances under some conditions. One of the most challenging problems is to use a small number of training samples from the data set that contains highly spectral variabilities. In order to overcome this problem, two novel hybrid methods based on spatial aware probabilistic multi-kernel collaborative representation are developed for hyperspectral image classification. These methods consist of dimension reduction, feature extraction, and classification stages. For feature extraction, two powerful methods including domain transform filtering and intrinsic image decomposition are used as spatial-spectral features. In the former method, multiple-kernel matrices of these features are fused with composite kernel technique, and then they are applied to spatial aware probabilistic kernel collaborative representation (PKCR). Here, compared to PKCR, spatial aware PKCR considers an additional spatial term that exploits superpixel-based spatial coordinate relation. In the latter method, kernel matrices are separately applied to spatial aware PKCR and their probabilistic decisions are fused to provide robust performance. In fact, the proposed methods are constructed by feature fusion and decision fusion manner. Experiments are carried out on three widely used data sets, namely, Indian Pines, Pavia University, and Salinas. We have compared the proposed methods with ten different state-of-the-art methods in terms of overall and average accuracies, Kappa coefficients (κ), McNemar Z-scores, and classification maps. Experimental results demonstrate that the proposed methods not only achieve the best classification accuracies among other methods for few labelled samples but also presents effective performances in higher number of training samples.
Tuschzeichnung einer Turmfassade mit Sonnenuhr
Creators: name: Risler, Jakob
Publisher: name: [s.n.]
Year: 1731

description: Undatierte, unsignierte Tuschezeichnung einer Turmfassade mit Sonnenuhr und drei Fenstern.
description: Öffentliche Bibliothek der Universität Basel
description: Verzeichnung=Description=Inventaire Februar 2022 Katalogisierung Helena Müller
Metadata description for dataset - 'AgriculturalParcel_CO2flux_France- Toulouse_0.30_15102018_15102019'
Creators: name: Institutional
Publisher: name: Zenodo
Year: 2022
Subjects: CO2 flux, Carbon, indicator, agricultural parcels, crop type

description: Metadata file for Dataset 'AgriculturalParcel_CO2flux_France- Toulouse_0.30_15102018_15102019'
Brief an Hans und seine Hausfrau [Amerbach]
Creators: name: Rechberger-Amerbach, Margaretha
Publisher: name: [s.n.]
Year: 1499

description: von Margret [Amerbach]
description: Unterzeichnet: Margred Trucker; Adressat bezeichnet: Hans Trucker
description: Deutsch
description: Druck: Die Amerbachkorrespondenz / bearb. und hrsg. von Alfred Hartmann. I. Band. - Basel : Verl. der Universitätsbibliothek, 1942, Nr. 97
description: Verzeichnung=Description=Inventaire August 2012 Vollständige Rekatalogisierung nach Standortverzeichnis G II 1 - G II 33 und Briefkatalog
Non-commutative Hilbert modular symbols
Creators: name: Horozov, Ivan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F11, 11F67, 11M32

description: The main goal of this paper is to construct non-commutative Hilbert modular symbols. However, we also construct commutative Hilbert modular symbols. Both the commutative and the non-commutative Hilbert modular symbols are generalizations of Manin's classical and non-commutative modular symbols. We prove that many cases of (non-)commutative Hilbert modular symbols are periods in the sense on Kontsevich-Zagier. Hecke operators act naturally on them. Manin defines the non-commutative modilar symbol in terms of iterated path integrals. In order to define non-commutative Hilbert modular symbols, we use a generalization of iterated path integrals to higher dimensions, which we call iterated integrals on membranes. Manin examines similarities between non-commutative modular symbol and multiple zeta values both in terms of infinite series and in terms of iterated path integrals. Here we examine similarities in the formulas for non-commutative Hilbert modular symbol and multiple Dedekind zeta values, recently defined by the author, both in terms of infinite series and in terms of iterated integrals on membranes.
description: 50 pages, 5 figures, substantial improvement of the article arXiv:math/0611955 [math.NT], the portions compared to the previous version are: Hecke operators, periods and some categorical constructions
Confinement, quark mass functions, and spontaneous chiral symmetry breaking in Minkowski space
Creators: name: Biernat, Elmar P.
name: Gross, Franz
name: Peña, M. T.
name: Stadler, Alfred
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We formulate the covariant equations for quark-antiquark bound states in Minkowski space in the framework of the Covariant Spectator Theory. The quark propagators are dressed with the same kernel that describes the interaction between different quarks. We show that these equations are charge-conjugation invariant, and that in the chiral limit of vanishing bare quark mass, a massless pseudoscalar bound state is produced in a Nambu-Jona-Lasinio (NJL) mechanism, which is associated with the Goldstone boson of spontaneous chiral symmetry breaking. In this introductory paper, we test the formalism by using a simplified kernel consisting of a momentum-space delta-function with a vector Lorentz structure, to which one adds a mixed scalar and vector confining interaction. The scalar part of the confining interaction is not chirally invariant by itself, but decouples from the equations in the chiral limit and therefore allows the NJL mechanism to work. With this model we calculate the quark mass function, and we compare our Minkowski-space results to lattice QCD data obtained in Euclidean space. In a companion paper, we apply this formalism to a calculation of the pion form factor.
description: 17 pages, 12 figures, version published in Phys. Rev. D
gwas-vcf-specification
Creators: name: Lyon, Matthew S
name: Andrews, Shea J
name: Elsworth, Ben
name: Gaunt, Tom R
name: Hemani, Gibran
name: Marcora, Edoardo
Publisher: name: Zenodo
Year: 2020
Subjects: subject: GWAS
subject: VCF
subject: Bioinformatics
subject: FOS: Computer and information sciences
subject: Summary statistics
subject: File format

description: The Variant Call Format Summary Statistics Specification v1.2
description: https://github.com/MRCIEU/gwas-vcf-specification
Turbulence in Binary Bose-Einstein Condensates Generated by Highly Non-Linear Rayleigh-Taylor and Kelvin-Helmholtz Instabilities
Creators: name: Kobyakov, D.
name: Bezett, A.
name: Lundh, E.
name: Marklund, M.
name: Bychkov, V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Quantum turbulence (QT) generated by the Rayleigh-Taylor instability in binary immiscible ultracold 87Rb atoms at zero temperature is studied theoretically. We show that the quantum vortex tangle is qualitatively different from previously considered superfluids, which reveals deep relations between QT and classical turbulence. The present QT may be generated at arbitrarily small Mach numbers, which is a unique property not found in previously studied superfluids. By numerical solution of the coupled Gross-Pitaevskii equations we find that the Kolmogorov scaling law holds for the incompressible kinetic energy. We demonstrate that the phenomenon may be observed in the laboratory.
description: Revised version. 7 pages, 8 figures
Quantum phase diagram of the $S=1/2$ triangular-lattice antiferromagnet Ba$_3$CoSb$_2$O$_9$
Creators: name: Koutroulakis, G.
name: Zhou, T.
name: Batista, C. D.
name: Kamiya, Y.
name: Thompson, J. D.
name: Brown, S. E.
name: Zhou, H. D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetic phases of the ideal spin-1/2 triangular-lattice antiferromagnet Ba$_3$CoSb$_2$O$_9$ are identified and studied using $^{135,137}$Ba nuclear magnetic resonance (NMR) spectroscopy in magnetic fields ranging to 30T, oriented parallel and near perpendicular to the crystallographic $ab$-plane. For both directions, the saturation field is approximately 33T. Notably, the NMR spectra provide microscopic evidence for the stabilization of an up-up-down spin configuration for in-plane fields, giving rise to an one-third magnetization plateau ($M_\text{sat}/3$), as well as for a higher field phase transition near to $\sim (3/5)M_\text{sat}$ for both field orientations. Phase transitions are signaled by the evolution of the NMR spectra, and in some cases through spin-lattice relaxation measurements. The results are compared with expectations obtained from a semi-classical energy density modeling, in which quantum effects are incorporated by effective interactions extracted from the spin-wave analysis of the two-dimensional model. The interlayer coupling also plays a significant role in the outcome. Good agreement between the model and the experimental results is achieved, except for the case of fields approaching the saturation value applied along the c-axis.
description: 16 pages, 21 figures
Using Lagrangian perturbation theory for precision cosmology
Creators: name: Sugiyama, Naonori S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We explore the Lagrangian perturbation theory (LPT) at 1-loop order with Gaussian initial conditions. We present an expansion method to approximately compute the power spectrum in LPT. Our approximate solution has good convergence in the series expansion and enables us to compute the power spectrum in LPT accurately and quickly. Non-linear corrections in the Lagrangian perturbation theory naturally satisfy the law of conservation of mass because the relation between matter density and the displacement vector of dark matter corresponds to the conservation of mass. By matching the 1-loop solution in LPT to the 2-loop solution in standard perturbation theory, we present an approximate solution of the power spectrum which has higher order corrections than the 2-loop order in standard perturbation theory with the conservation of mass satisfied. With this approximation, we can use LPT to compute a non-linear power spectrum without any free parameters, and this solution agrees with numerical simulations at $k=0.2$ $h{\rm Mpc}^{-1}$ and $z=0.35$ to better than 2%.
description: 35 pages, 9 figures
MPEC 2025-C96 : 2022 LH15
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Implied Base Correlation Mapping Methodology
Creators: name: Lee, David
Publisher: name: Zenodo
Year: 2022
Subjects: Implied Base Correlation Mapping Methodology

description: The Mapping model serves the purpose of finding implied base correlations for a bespoke CDO trade from market quoted standard CDO indices Dow Jones CDX and iTraxx Europe. In this report, a CDO tranche is defined as bespoke if its reference portfolio composition is different from that of CDO indices.
description: https://ia904700.us.archive.org/14/items/bondAmericanOption/bondAmericanOption.pdf
Lepton masses and mixings in a $A_{4}$ multi-Higgs model with radiative seesaw mechanism
Creators: name: Hernández, A. E. Cárcamo
name: Varzielas, Ivo de Medeiros
name: Kovalenko, S. G.
name: Päs, H.
name: Schmidt, Iván
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a renormalizable multi-Higgs model with $A_{4}\otimes Z_{2}\otimes Z^{\prime}_{2}$ symmetry, accounting for the experimental deviation from the tribimaximal mixing pattern of the neutrino mixing matrix. In this framework we study the charged lepton and neutrino masses and mixings. The light neutrino masses are generated via a radiative seesaw mechanism, which involves a single heavy Majorana neutrino and neutral scalars running in the loops. The obtained neutrino mixings and mass squared splittings are in good agreement with the neutrino oscillation experimental data for both normal and inverted hierarchy. The model predicts an effective Majorana neutrino mass $m_{ββ}=$ 4 meV and 50 meV for the normal and the inverted neutrino spectrum, respectively. The model also features a suppression of CP violation in neutrino oscillations, a low scale for the heavy Majorana neutrino (few TeV) and, due to the unbroken $Z_2$ symmetry, a natural dark matter candidate.
description: 15 pages, 1 figure; acknowledgements modified. Version for publication in Physical Review D
Common Radiative Origin of Active and Sterile Neutrino Masses
Creators: name: Borah, Debasish
name: Adhikari, Rathin
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Sterile neutrinos with sub-electron volt (eV) masses have recently received serious attention due to the tantalizing hints from reactor neutrino experiments as well as cosmology. While the nine year old Wilkinson Mass Anisotropy Probe experiment suggests the effective number of relativistic degrees of freedom to be $N_{\text{eff}} = 3.84 \pm 0.40$, recently reported Planck collaboration results show more preference towards the standard three light neutrino scenario $ N_{\text{eff}} = 3.30^{+0.54}_{-0.51}$. Keeping in mind that the issue of existence or non-existence of sub-eV scale sterile neutrinos is not yet settled, here we outline a mechanism to generate sub-eV scale masses for three active and one sterile neutrinos simultaneously. The model is based on an abelian extension of standard model where the fermion and scalar fields are charged under the additional $U(1)$ gauge group in such an anomaly free way that it allows one eV scale neutrino and three massless neutrinos at tree level. However, at one loop level, this model naturally allows three active and one sterile neutrino with mass at the sub-eV scale. The model also allows for mixing between active and sterile neutrinos at one loop level which can have interesting signatures in reactor neutrino experiments.
description: v2: Discussion on active neutrino mixing included, more references added, to appear in Physics Letters B. arXiv admin note: substantial text overlap with arXiv:1202.2718
Superconducting phase within the hidden-order state of the heavy-fermion material $\mathrm{URu_{2}Si_{2}}$
Creators: name: Hsu, Chen-Hsuan
name: Chakravarty, Sudip
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: An unconventional pairing mechanism in the heavy-fermion material $\mathrm{URu_{2}Si_{2}}$ is studied. We propose a mixed singlet-triplet $d$-density wave to be the hidden-order state in $\mathrm{URu_{2}Si_{2}}$. The exotic order is topologically nontrivial and supports a charge $2e$ skyrmionic spin texture, which is assumed to fractionalize into merons and antimerons at the deconfined quantum critical point. The interaction between these fractional particles results in a (pseudo)spin-singlet chiral $d$-wave superconducting state, which breaks time reversal symmetry. Therefore, it is highly likely to produce a nonzero signal of the polar Kerr effect at the onset of the superconductivity, consistent with recent experiments. In addition, the nodal structures of the possible pairing functions in our model are consistent with the thermodynamic experiments in $\mathrm{URu_{2}Si_{2}}$.
description: Version accepted in Phys. Rev. B
Perturbations of W(infinity) CFTs
Creators: name: Gaberdiel, Matthias R.
name: Jin, Kewang
name: Li, Wei
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The holographic duals of higher spin theories on AdS_3 are described by the large N limit of a family of minimal model CFTs, whose symmetry algebra is equivalent to W(infinity)[lambda]. We study perturbations of these limit theories, and show that they possess a marginal symmetry-preserving perturbation that describes switching on the 1/N corrections. We also test our general results for the specific cases of lambda=0,1, where free field realisations are available.
description: 38 pages, 1 figure; v2: minor additions and Fig.1. colored
Is a deep one-cell meridional circulation essential for the flux transport Solar Dynamo?
Creators: name: Hazra, Gopal
name: Karak, Bidya Binay
name: Choudhuri, Arnab Rai
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The solar activity cycle is successfully modeled by the flux transport dynamo, in which the meridional circulation of the Sun plays an important role. Most of the kinematic dynamo simulations assume a one-cell structure of the meridional circulation within the convection zone, with the equatorward return flow at its bottom. In view of the recent claims that the return flow occurs at a much shallower depth, we explore whether a meridional circulation with such a shallow return flow can still retain the attractive features of the flux transport dynamo (such as a proper butterfly diagram, the proper phase relation between the toroidal and poloidal fields). We consider additional cells of the meridional circulation below the shallow return flow---both the case of multiple cells radially stacked above one another and the case of more complicated cell patterns. As long as there is an equatorward flow in low latitudes at the bottom of the convection zone, we find that the solar behavior is approximately reproduced. However, if there is either no flow or a poleward flow at the bottom of the convection zone, then we cannot reproduce solar behavior. On making the turbulent diffusivity low, we still find periodic behavior, although the period of the cycle becomes unrealistically large. Also, with a low diffusivity, we do not get the observed correlation between the polar field at the sunspot minimum and the strength of the next cycle, which is reproduced when diffusivity is high. On introducing radially downward pumping, we get a more reasonable period and more solar-like behavior even with low diffusivity.
description: 12 pages, 13 figures