cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Praktiken der Eignungsabklärung von angehenden Zürcher Primarlehrpersonen (1940-1960)
Creators: name: Hoffmann-Ocon, Andreas
Publisher: name: Zenodo
Year: 2020
Subjects: Praxeologie
Methodologie
Bildungsgeschichte
Pädagogische Routinen
Bildung
Kulturgeschichte
Bildungstheorie
Pädagogik

description: Beitrag im Sammelband «Praxeologie in der Historischen Bildungsforschung: Möglichkeiten und Grenzen eines Forschungsansatzes» 10.5281/zenodo.4045831. Um eine Balance von Kontrolle und Eigensinn geht es bei der im Beitrag von Andreas Hoffmann-Ocon im Zentrum stehenden Eignungsabklärung, die unter einer doppelten Zielsetzung untersucht wird: Einerseits richtet sich der Fokus auf die Erschliessung von Praktiken der Eignungsabklärung angehender Zürcher Primarlehrpersonen um die Mitte des 20. Jahrhunderts anhand von Fallbeispielen, andererseits wird gegenstandsbezogen die Frage aufgegriffen, welche neuen Einblicke spezifische Quellen – etwa Kommissionsprotokolle, Ego-Dokumente und Praxisberichte angehender Unterrichtender und Jahresberichte – auf sich erneuernde und wandelnde Alltagsroutinen im Handlungsfeld der Eignungsabklärung bieten. Anders als im kantonalen Seminar Küsnacht, im Evangelischen Seminar Unterstrass oder im Lehrerinnenseminar der Höheren Töchterschule war das zu Beginn der 1940er-Jahre eingerichtete Oberseminar des Kantons Zürich ein Ort nachmaturitärer Ausbildung. Um die lokalen Praktiken und ihre vielfältigen Variationen seitens der Kandidierenden von der Dimension des zirkulierenden pädagogischen Wissens über Schülerbeobachtung, Taktgefühl und Selbstoptimierung, auf das in der Prüfungsphase rekurriert wurde, beschreiben und vermessen zu können, werden zeitgenössisch geläufige Diskurse und leitende Metaphern in die Analyse miteinbezogen. Die praxeologische Perspektive wird genutzt, um dasjenige an der eignungsrelevanten studentischen Praxisberichterstattung präziser zu bestimmen, was die situative Aushandlung des Prüfungsgrenzverlaufs in einer Phase akuten Lehrpersonenmangels bildete. Wie sehr das Soziale – z.B. in Form von Herkunft der Kandidierenden, von Arbeitsbedingungen in Krisen- und Kriegszeiten und Stadt-Land-Differenzen, in das die Eignungsabklärungspraktiken eingebettet war – in der Interaktion zwischen angehenden Lehrpersonen und Direktion eine erstaunliche Vielgestaltigkeit der Berichtspraxis hervorbrachte, zeigt Hoffmann-Ocons Beitrag. Die Differenz zwischen den Berichtstypen, vom Studentenaufsatz, der anstelle von Praxiseinblicken Versatzstücke aus der Pädagogikvorlesung reproduziert, bis zum lyrischen Spiel mit der eigenen Eignung, eröffnet den Blick auf das gesamte Praxisarrangement der Abklärung, das auch für eigensinnige Inszenierungen durch angehende Lehrpersonen zugänglich gewesen ist.
description: +repphzhbib2020F
Construction of an algebra corresponding to a statistical model of the square ladder (square lattice with two lines)
Creators: name: Sopin, Valerii
Publisher: name: arXiv
Year: 2018
Subjects: subject: Combinatorics (math.CO)
subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 47L99, 16G99

description: In this paper we define infinite-dimensional algebra and its representation, whose basis is naturally identified with semi-infinite configurations of the square ladder model. We also extrapolate the ideas for the cyclic 3-leg triangular ladder model. All of these propose a way for generalization, which leads to representations of N = 2, ... algebras. Keywords: 2D lattice, square ladder, triangular ladder, conformal algebra, semi-infinite forms, fermions, quadratic algebra, superfrustration, graded Euler characteristic, cohomology, deformation, Jacobi triple product, superalgebras, operator algebras, N = 2, ... algebras.
description: 13 pages, 7 figures
On four-dimensional Einsteinian gravity, quasitopological gravity, cosmology and black holes
Creators: name: Cisterna, Adolfo
name: Grandi, Nicolas
name: Oliva, Julio
Publisher: name: arXiv
Year: 2018
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: FOS: Physical sciences

description: We show that the combination of cubic invariants defining five-dimensional quasitopological gravity, when written in four dimensions, reduce to the version of four-dimensional Einsteinian gravity recently proposed by Arciniega, Edelstein & Jaime, that produces second order equations of motion in a FLRW ansatz, with a purely geometrical inflationary period. We introduce a quartic version of the four-dimensional Einsteinian theory with similar properties, and study its consequences. In particular we found that there exists a region on the space of parameters which allows for thermodynamically stable black holes, as well as a well-defined cosmology with geometrically driven inflation. We briefly discuss the cosmological inhomogeneities in this setup. We also provide a combination of quintic invariants with those properties.
description: Minor corrections, 14 pages, 1 figure
Three-speed ballistic annihilation: phase transition and universality
Creators: name: Haslegrave, John
name: Sidoravicius, Vladas
name: Tournier, Laurent
Publisher: name: arXiv
Year: 2018
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K35

description: We consider ballistic annihilation, a model for chemical reactions first introduced in the 1980's physics literature. In this particle system, initial locations are given by a renewal process on the line, motions are ballistic - i.e. each particle is assigned an i.i.d. constant velocity - and collisions between pairs of particles result in mutual annihilation. We focus on the case when the velocities are symmetrically distributed among three values, i.e. particles either remain static (with given probability~$p$) or move at constant velocity uniformly chosen among $\pm1$. We establish that this model goes through a phase transition at $p_c=1/4$ between a subcritical regime where every particle eventually annihilates, and a supercritical regime where a positive density of static particles is never hit, confirming 1990s predictions of Droz et al. for the particular case of a Poisson process. Our result encompasses cases where triple collisions can happen; these are resolved by annihilation of one static and one randomly chosen moving particle. Our arguments, of combinatorial nature, show that, although the model is not completely solvable, certain large scale features can be explicitly computed, and are universal, i.e. insensitive to the distribution of the initial point process. In particular, in the critical and subcritical regimes, the asymptotics of the time decay of the densities of each type of particle is universal (among exponentially integrable interdistance distributions) and, in the supercritical regime, the distribution of the ``skyline'' process, i.e. the process restricted to the last particles to ever visit a location, has a universal description. We also prove that an alternative model introduced by Burdinski, Gupta and Junge does not share the same universality as our model, and find numerical bounds on its critical probability.
description: 39 pages, 4 figures. Minor revision, to appear in Selecta Mathematica
On polyhedral approximations of the positive semidefinite cone
Creators: name: Fawzi, Hamza
Publisher: name: arXiv
Year: 2018
Subjects: subject: Optimization and Control (math.OC)
subject: Computational Complexity (cs.CC)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Let $D$ be the set of $n\times n$ positive semidefinite matrices of trace equal to one, also known as the set of density matrices. We prove two results on the hardness of approximating $D$ with polytopes. First, we show that if $0 < ε< 1$ and $A$ is an arbitrary matrix of trace equal to one, any polytope $P$ such that $(1-ε)(D-A) \subset P \subset D-A$ must have linear programming extension complexity at least $\exp(c\sqrt{n})$ where $c > 0$ is a constant that depends on $ε$. Second, we show that any polytope $P$ such that $D \subset P$ and such that the Gaussian width of $P$ is at most twice the Gaussian width of $D$ must have extension complexity at least $\exp(cn^{1/3})$. The main ingredient of our proofs is hypercontractivity of the noise operator on the hypercube.
description: 12 pages
Effective estimates for the degrees of maximal special subvarieties
Creators: name: Daw, Christopher
name: Javanpeykar, Ariyan
name: Kühne, Lars
Publisher: name: arXiv
Year: 2018
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11G18, 14G35

description: Let $Z$ be an algebraic subvariety of a Shimura variety. We extend results of the first author to prove an effective upper bound for the degree of a non-facteur maximal special subvariety of $Z$.
description: 27 pages
Sequentially Cohen-Macaulay matroidal ideals
Creators: name: Jafari, Madineh
name: Mafi, Amir
name: Saremi, Hero
Publisher: name: arXiv
Year: 2019
Subjects: subject: Commutative Algebra (math.AC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Let $R=K[x_1,...,x_n]$ be the polynomial ring in $n$ variables over a field $K$ and let $J$ be a matroidal ideal of degree $d$ in $R$. In this paper, we study the class of sequentially Cohen-Macaulay matroidal ideals. In particular, all sequentially Cohen-Macaulay matroidal ideals of degree $2$ are classified. Furthermore, we give a classification of sequentially Cohen-Macaulay matroidal ideals of degree $d\geq 3$ in some special cases.
description: 12 pages, Comments are welcome!
Fehler- und Strafpraktiken am Ende der Frühen Neuzeit am Beispiel von Schule und Unterricht in der Deutschschweiz
Creators: name: Horlacher, Rebekka
Publisher: name: Zenodo
Year: 2020
Subjects: Praxeologie
Bildung
Bildungsgeschichte
Pädagogische Routinen
Kulturgeschichte
Pädagogik

description: Beitrag im Sammelband «Praxeologie in der Historischen Bildungsforschung: Möglichkeiten und Grenzen eines Forschungsansatzes» 10.5281/zenodo.4045831. Anhand von Leitfäden zum Lehrerhandeln aus der zweiten Hälfte des 18. Jahrhunderts sowie von thematisch einschlägigen Passagen von Lehrerantworten auf eine staatliche Schulumfrage aus dem Jahr 1799 in der Schweiz beschäftigt sich dieser Beitrag mit Praktiken des Fehlers sowie der Strafe in schulischen Kontexten um 1800. Praktiken verstanden als kontextualisierte Verhaltens- und Handlungsweisen und mit Betonung auf wechselseitigem Austauschverhältnis zwischen Normen und Praxis. Die in den Leitfäden enthaltenen Beschreibungen von Strafpraxis weisen, so die in diesem Beitrag entfaltete These, aufgrund ihrer Autorenschaft, die einer Bildungselite zuzurechnen sei, stets auch einen normierenden Gehalt auf. Vergleichbar dazu seien die Antworten der Schulumfrage ebenfalls eher von überaus engagierten Lehrpersonen gegeben worden, die sich freiwillig zu Praktiken des Fehlers oder der Strafe geäussert hätten. Der Beitrag greift Fragen zum Verhältnis der ausgewerteten angeblich auf eigenen Erfahrungen der Autoren fussenden Quellen zu einer an Schulen etablierten Strafpraxis auf. Gibt es eine inhaltlich zur schulischen Strafpraxis differente Praxis der schulischen Strafnormierung, etwa wenn die Leitfäden und Umfrageantworten von der an Schulen zwar etablierten Prügelstrafe berichten, diese jedoch durchgängig ablehnen? Diese und weitere Fragen werden in einer vergleichenden Perspektive anhand von Gemeinsamkeiten und Unterschieden zwischen den einzelnen Leitfäden, aber auch zwischen den darin postulierten normierenden und schulisch etablierten Praktiken für die Zeit des späten 18. Jahrhunderts diskutiert, etwa bezüglich der körperlichen Züchtigung, der Angemessenheit oder dem erzieherischen Gehalt von Strafen. Der Beitrag schliesst mit grundsätzlicheren Überlegungen zur möglicherweise anhaltenden Bedeutung von Ratgeberliteratur und einem historiografischen »Mehrwert« der praxeologischen Perspektive in Bezug auf dieses Thema.
description: +repphzhbib2020F
Singular stochastic integral operators
Creators: name: Lorist, Emiel
name: Veraar, Mark
Publisher: name: arXiv
Year: 2019
Subjects: subject: Functional Analysis (math.FA)
subject: Analysis of PDEs (math.AP)
subject: Classical Analysis and ODEs (math.CA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: Primary: 60H15, Secondary: 35B65, 35R60, 42B37, 47D06

description: In this paper we introduce Calderón-Zygmund theory for singular stochastic integrals with operator-valued kernel. In particular, we prove $L^p$-extrapolation results under a Hörmander condition on the kernel. Sparse domination and sharp weighted bounds are obtained under a Dini condition on the kernel, leading to a stochastic version of the solution to the $A_2$-conjecture. The results are applied to obtain $p$-independence and weighted bounds for stochastic maximal $L^p$-regularity both in the complex and real interpolation scale. As a consequence we obtain several new regularity results for the stochastic heat equation on $\mathbb{R}^d$ and smooth and angular domains.
description: Minor typos corrected. Published in Analysis & PDE
Registrieren oder Verstehen? Überlegungen zur Rekonstruktion sozialer Wirklichkeit mittels sozialer Handlung und/oder Praxis
Creators: name: Maeder, Christoph
Publisher: name: Zenodo
Year: 2020
Subjects: Wissenssoziologie
Praxeologie
Methodologie
Bildungsgeschichte
Pädagogische Routinen
Bildung
Kulturgeschichte
Bildungstheorie

description: Beitrag im Sammelband «Praxeologie in der Historischen Bildungsforschung: Möglichkeiten und Grenzen eines Forschungsansatzes» 10.5281/zenodo.4045831. Christoph Mäder entfaltet aus wissenssoziologischer Perspektive wissenschaftliche Rezeptions- und Verwendungspfade praxeologischer Konzepte. In seinem eher essayistischen Beitrag plädiert er dafür, bei der Rekonstruktion sozialer ›Wirklichkeit‹ mittels Handlungen und Praktiken nie allein auf formale Strukturen von praktischen Handlungen zu fokussieren, sondern immer auch den Prozeduren, die den situativen Sinn erzeugen, Rechnung zu tragen. Dazu stellt er sich hochkomplex und detailverliebt gebenden, das Subjekt verflüssigenden Praxistheorien eine ethnomethodologischen Sicht auf Praktiken gegenüber, wonach Praktiken nicht die Auflösung des Subjekts in einer situativen Mimesis von Körpern und Dingen bedeuteten, sondern in Ergänzung zum Subjekt konzipiert seien. Praktische Handlungen weisen in dieser Perspektive jeweils vier formale Ebenen auf, welche stets allesamt in die Rekonstruktionen gelebter und sozialer ›Wirklichkeit‹ einzubeziehen wären. Die vier Bereiche der Indexikalität, der Sequenzialität, der Reflexivität und der Reziprozität verweisen letztlich in unterschiedlichen Dimensionen auf eine auch in einigen praxeologischen Ansätzen betonte Kontextualität praktischer Handlungen. Dies sowie auch Fragen nach der Konzeption des Subjekts oder eben der Akteurinnen und Akteure sowie auch nach Handlungssinn und seinem Verhältnis zu implizitem und explizitem Wissen bieten wiederum Anknüpfungspunkte zu vielen Beiträgen dieses Bandes.
description: +repphzhbib2020F
Comparison of mitragynine stability in human blood in common blood collection tubes
Creators: name: Udomsak Hoonwijit
name: Kanok Waithum
name: Tansrisawad, Nat
Publisher: name: Faculty of Medicine Chulalongkorn University
Year: 2020
Subjects: Mitragynine, stability in human blood, comparison, blood collection tube

description: Chulalongkorn Medical Journal, 64, 4, 439-447
Exploring CEvNS with NUCLEUS at the Chooz Nuclear Power Plant
Creators: name: Angloher, G.
name: Ardellier-Desages, F.
name: Bento, A.
name: Canonica, L.
name: Erhart, A.
name: Ferreiro, N.
name: Friedl, M.
name: Ghete, V. M.
name: Hauff, D.
name: Kluck, H.
name: Langenkämper, A.
name: Lasserre, T.
name: Lhuillier, D.
name: Kinast, A.
name: Mancuso, M.
name: Rubiales, J. Molina
name: Mondragon, E.
name: Munch, G.
name: Nones, C.
name: Oberauer, L.
name: Onillon, A.
name: Ortmann, T.
name: Pattavina, L.
name: Petricca, F.
name: Potzel, W.
name: Pröbst, F.
name: Reindl, F.
name: Rothe, J.
name: Schieck, J.
name: Schönert, S.
name: Schwertner, C.
name: Scola, L.
name: Stodolsky, L.
name: Strauss, R.
name: Vivier, M.
name: Wagner, V.
name: Zolotarova, A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Coherent elastic neutrino-nucleus scattering (CE$ν$NS) offers a unique way to study neutrino properties and to search for new physics beyond the Standard Model. Nuclear reactors are promising sources to explore this process at low energies since they deliver large fluxes of (anti-)neutrinos with typical energies of a few MeV. In this paper, a new-generation experiment to study CE$ν$NS is described. The NUCLEUS experiment will use cryogenic detectors which feature an unprecedentedly low energy threshold and a time response fast enough to be operated in above-ground conditions. Both sensitivity to low-energy nuclear recoils and a high event rate tolerance are stringent requirements to measure CE$ν$NS of reactor antineutrinos. A new experimental site, denoted the Very-Near-Site (VNS) at the Chooz nuclear power plant in France is described. The VNS is located between the two 4.25 GW$_{\mathrm{th}}$ reactor cores and matches the requirements of NUCLEUS. First results of on-site measurements of neutron and muon backgrounds, the expected dominant background contributions, are given. In this paper a preliminary experimental setup with dedicated active and passive background reduction techniques is presented. Furthermore, the feasibility to operate the NUCLEUS detectors in coincidence with an active muon-veto at shallow overburden is studied. The paper concludes with a sensitivity study pointing out the promising physics potential of NUCLEUS at the Chooz nuclear power plant.
NatJEUSAL 2nd Residential Seminar - Würzburg 14, 15 November 2019: Richterfortbildung: Private Durchsetzung des Beihilferechts
Creators: name: Cortese, Bernardo
name: Bien, Florian
Publisher: name: Zenodo
Year: 2019

description: NatJEUSAL Second Residential Training Seminar
 Würzburg, 14, 15 November 2020
 Alte Universität, Domerschulstr. 16, Würzburg Richterfortbildung: Private Durchsetzung des Beihilferechts
description: https://www.jura.uni-wuerzburg.de/fileadmin/02140600/SS_2021/Meldungen_2021/Programm_-_Richterschulung_Beihilferecht_14._und_15.11.2019_1627_.pdf NatJEUSAL action Funded by the European Commission – Dg Comp co-funded by the University of Padova Department for Public Law, International and EU Law -DiPIC Grant Agreement HT.5430.SI2.791660 Training of National Judges - Call for Proposals HT.5155
Die normative Kraft: Bildungstheoretische Reflexion von zentralen Elementen der Buchbeiträge
Creators: name: Bascio, Tomas
Publisher: name: Zenodo
Year: 2020
Subjects: Praxeologie
Methodologie
Bildung
Kulturgeschichte
Bildungstheorie

description: Beitrag im Sammelband «Praxeologie in der Historischen Bildungsforschung: Möglichkeiten und Grenzen eines Forschungsansatzes» 10.5281/zenodo.4045831. Tomas Bascio wiederum wirft abschliessende und kommentierende Blicke auf die einzelnen in den jeweiligen Beiträgen untersuchten Fallstudien. Er greift in einer synoptischen Sicht die Bedeutungsvarianz zentraler Begrifflichkeiten, insbesondere die Bedeutungen von Norm und Normativität in den praxeologischen Beiträgen auf und streicht im Sinne des Sammelbandes Möglichkeiten und Grenzen der jeweils gewählten praxeologischen Analysezugänge und Quellen noch einmal im Überblick heraus. Indem Bascio den Zusammenhang von Praktiken und normierenden Ordnungen fokussiert, thematisieren seine Schlussreflexionen entlang dieser Perspektive die Diskussionslinien, Gemeinsamkeiten und Unterschiede im jeweiligen methodisch-konzeptionellen Ansatz sowie bei den Schlussfolgerungen. So sollen mögliche, aus den unterschiedlichen Perspektiven gewonnene Erträge und weiterführende Gedanken vorläufig festgehalten werden. Mit dieser vergleichenden Einschätzung der in diesem Band versammelten historisch-praxeologischen Studien ist weniger eine abschliessende Beurteilung beabsichtigt, sondern die Anregung, historische Praxeologie als ein produktives Forschungsmilieu mit vielfältigen interdisziplinären Berührungspunkten zu begreifen.
description: +repphzhbib2020F
Harmonic metallic structures
Creators: name: Blaga, Adara M.
name: Nannicini, Antonella
Publisher: name: arXiv
Year: 2019
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: The concept of harmonic metallic structure on a metallic pseudo-Riemannian manifold is introduced. In the case of compact manifolds we prove that harmonicity of a metallic structure $J$, with $J^2=pJ+qI$ and $p^2+4q\neq 0$, is equivalent to $dJ=0$. Conditions for a harmonic metallic structure to be preserved by harmonic maps are also given. Moreover, we consider harmonic metallic structures on the generalized tangent bundle, provide a Weitzenböck formula for the dual metallic structure and express the Hodge-Laplace operator on $TM \oplus T^*M$.
description: 17 pages
A topological characterization of dual strict convexity in Asplund spaces
Creators: name: Smith, Richard J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46B03, 46B26

description: Let $X$ be an Asplund space. We show that the existence of an equivalent norm on $X$ having a strictly convex dual norm is equivalent to the dual unit sphere $S_{X^*}$ (equivalently $X^*$) possessing a non-linear topological property called ($*$), which was introduced by J. Orihuela, S. Troyanski and the author.
Convergence of Newton-MR under Inexact Hessian Information
Creators: name: Liu, Yang
name: Roosta, Fred
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Recently, there has been a surge of interest in designing variants of the classical Newton-CG in which the Hessian of a (strongly) convex function is replaced by suitable approximations. This is mainly motivated by large-scale finite-sum minimization problems that arise in many machine learning applications. Going beyond convexity, inexact Hessian information has also been recently considered in the context of algorithms such as trust-region or (adaptive) cubic regularization for general non-convex problems. Here, we do that for Newton-MR, which extends the application range of the classical Newton-CG beyond convexity to invex problems. Unlike the convergence analysis of Newton-CG, which relies on spectrum preserving Hessian approximations in the sense of Löwner partial order, our work here draws from matrix perturbation theory to estimate the distance between the subspaces underlying the exact and approximate Hessian matrices. Numerical experiments demonstrate a great degree of resilience to such Hessian approximations, amounting to a highly efficient algorithm in large-scale problems.
description: 32 pages, 10 figures
Entropy of Bergman measures of a toric Kaehler manifold
Creators: name: Flurin, Pierre
name: Zelditch, Steve
Publisher: name: arXiv
Year: 2019
Subjects: subject: Complex Variables (math.CV)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: Associated to the Bergman kernels of a polarized toric Kaehler manifold $(M, ω, L, h)$ are sequences of measures $\{μ_k^z\}_{k=1}^{\infty}$ parametrized by the points $z \in M$. We determine the asymptotics of the entropies $H(μ_k^z)$ of these measures. The sequence $μ_k^z$ in some ways resembles a sequence of convolution powers; we determine precisely when it actually is such a sequence.
description: Added results in the Fano case and especially in the Kahler-Einstein Fano case. Added an additional result on convolutions
The space of homogeneous probability measures on $\overline{Γ\backslash X}^S_{\rm max}$ is compact
Creators: name: Daw, Christopher
name: Gorodnik, Alexander
name: Ullmo, Emmanuel
name: Li, Jialun
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: In this paper we prove that the space of homogeneous probability measures on the maximal Satake compactification of an arithmetic locally symmetric space is compact. As an application, we explain some consequences for the distribution of weakly special subvarieties of Shimura varieties.
description: 27 pages; appendix by Jialun Li. arXiv admin note: text overlap with arXiv:1809.10090
Empirical Study of Easy and Hard Examples in CNN Training
Creators: name: Kishida, Ikki
name: Nakayama, Hideki
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deep Neural Networks (DNNs) generalize well despite their massive size and capability of memorizing all examples. There is a hypothesis that DNNs start learning from simple patterns and the hypothesis is based on the existence of examples that are consistently well-classified at the early training stage (i.e., easy examples) and examples misclassified (i.e., hard examples). Easy examples are the evidence that DNNs start learning from specific patterns and there is a consistent learning process. It is important to know how DNNs learn patterns and obtain generalization ability, however, properties of easy and hard examples are not thoroughly investigated (e.g., contributions to generalization and visual appearances). In this work, we study the similarities of easy and hard examples respectively for different Convolutional Neural Network (CNN) architectures, assessing how those examples contribute to generalization. Our results show that easy examples are visually similar to each other and hard examples are visually diverse, and both examples are largely shared across different CNN architectures. Moreover, while hard examples tend to contribute more to generalization than easy examples, removing a large number of easy examples leads to poor generalization. By analyzing those results, we hypothesize that biases in a dataset and Stochastic Gradient Descent (SGD) are the reasons why CNNs have consistent easy and hard examples. Furthermore, we show that large scale classification datasets can be efficiently compressed by using easiness proposed in this work.
description: Accepted to ICONIP 2019
AI for Social Impact: Learning and Planning in the Data-to-Deployment Pipeline
Creators: name: Perrault, Andrew
name: Fang, Fei
name: Sinha, Arunesh
name: Tambe, Milind
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Computer Science and Game Theory (cs.GT)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: With the maturing of AI and multiagent systems research, we have a tremendous opportunity to direct these advances towards addressing complex societal problems. In pursuit of this goal of AI for Social Impact, we as AI researchers must go beyond improvements in computational methodology; it is important to step out in the field to demonstrate social impact. To this end, we focus on the problems of public safety and security, wildlife conservation, and public health in low-resource communities, and present research advances in multiagent systems to address one key cross-cutting challenge: how to effectively deploy our limited intervention resources in these problem domains. We present case studies from our deployments around the world as well as lessons learned that we hope are of use to researchers who are interested in AI for Social Impact. In pushing this research agenda, we believe AI can indeed play an important role in fighting social injustice and improving society.
description: AI Magazine, Winter 2020
An Alternating Direction Explicit Method for Time Evolution Equations with Applications to Fractional Differential Equations
Creators: name: Liu, Hao
name: Leung, Shingyu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65M06, 65M12, 26A33

description: We derive and analyze the alternating direction explicit (ADE) method for time evolution equations with the time-dependent Dirichlet boundary condition and with the zero Neumann boundary condition. The original ADE method is an additive operator splitting (AOS) method, which has been developed for treating a wide range of linear and nonlinear time evolution equations with the zero Dirichlet boundary condition. For linear equations, it has been shown to achieve the second order accuracy in time yet is unconditionally stable for an arbitrary time step size. For the boundary conditions considered in this work, we carefully construct the updating formula at grid points near the boundary of the computational domain and show that these formulas maintain the desired accuracy and the property of unconditional stability. We also construct numerical methods based on the ADE scheme for two classes of fractional differential equations. We will give numerical examples to demonstrate the simplicity and the computational efficiency of the method.
description: 25 pages, 1 figure, 7 tables
Predictive Crystal Plasticity Modeling of Single Crystal Nickel Based on First-Principles Calculations
Creators: name: Shimanek, John D.
name: Qin, Shipin
name: Shang, Shun-Li
name: Liu, Zi-Kui
name: Beese, Allison M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: To reduce reliance on experimental fitting data within the crystal plasticity finite element method (CPFEM), an approached is proposed that integrates first-principles calculations based on density functional theory (DFT) to predict the strain hardening behavior of pure Ni single crystals. Flow resistance was evaluated through the Peierls-Nabarro equation using the ideal shear strength and elastic properties calculated by DFT-based methods, with hardening behavior modeled by imposing strains on supercells in first-principles calculations. Considered alone, elastic interactions of pure edge dislocations capture hardening behavior for small strains on single slip systems. For larger strains, hardening is captured through a strain-weighted linear combination of edge and screw flow resistance components. The rate of combination is not predicted in the present framework, but agreement with experiments through large strains (~0.4) for multiple loading orientations demonstrates a possible route for more predictive crystal plasticity modeling through incorporation of analytical models of mesoscale physics.
description: 41 pages, 8 figures, 4 tables; supplemental information appended (13 pages, 2 figures, 2 tables)
Palladium nanoparticles supported on nitrogen doped porous carbon material derived from cyclodextrin, glucose and melamine based polymer: promising catalysts for hydrogenation reactions
Creators: name: Heravi, Majid Mommahed
name: Samaheh Sadjadi
name: Malmir, Masoumeh
name: Léger, Bastien
name: Monflier, Eric
Publisher: name: figshare
Year: 2020
Subjects: subject: 30401 Biologically Active Molecules
subject: FOS: Chemical sciences
subject: 30603 Colloid and Surface Chemistry
subject: Computational Chemistry

description: Melamine based polymer (MT) was prepared and then reacted with a mixture of glucose (Glu) and β-cyclodextrin (CD) under hydrothermal conditions to afford, MT/Glu-CD. Then, the adsorption of Pd salt was realized on MT/Glu-CD. The resulting compound was subsequently carbonized to furnish Pd/MT/C that exhibited high catalytic activity for the hydrogenation of nitroarenes in aqueous media. To elucidate the roles of CD, Glu, the molar ratio of Glu:CD and the carbonization in the catalytic activity, several control catalysts have been prepared and their performances for a model hydrogenation reaction were compared with that of Pd/MT/C. The results confirmed the importance of the carbonization as well as the presence of CD for achieving high catalytic activity. Moreover, it was found that the molar ratio of Glu:CD could affect the catalytic activity of the final catalyst and the optimum molar ratio of Glu:CD was 30:70. The recycling test as well as measurement of Pd leaching demonstrated high recyclability and low Pd leaching of Pd/MT/C
Lower bounds for Cauchy data on curves in a negatively curved surface
Creators: name: Galkowski, Jeffrey
name: Zelditch, Steve
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove a uniform lower bound on Cauchy data on an arbitrary curve on a negatively curved surface using the Dyatlov-Jin(-Nonnenmacher) observability estimate on the global surface. In the process, we prove some further results about defect measures of restrictions of eigenfunctions to a hypersurface.
Veronese and Segre morphisms between non-commutative projective spaces
Creators: name: Arici, Francesca
name: Galuppi, Francesco
name: Gateva-Ivanova, Tatiana
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: Primary 16S37, 16S38, 16S15, 16S10, 81R60

description: We study Veronese and Segre morphisms between non-commutative projective spaces. We compute finite reduced Gröbner bases for their kernels, and we compare them with their analogues in the commutative case.
description: 24 pages
Interplay between chemical order and magnetic properties in L1$_0$ FeNi (tetrataenite): A First-Principles Study
Creators: name: Izardar, Ankit
name: Ederer, Claude
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We use first-principles-based calculations to investigate the interplay between chemical order and the magnetic properties of $L1_0$ FeNi. In particular, we investigate how deviations from perfect chemical order affect the energy difference between the paramagnetic and ferromagnetic states as well as the important magneto-crystalline anisotropy energy. Our calculations demonstrate a strong effect of the magnetic order on the chemical order-disorder transition temperature, and conversely, a strong enhancement of the magnetic transition temperature by the chemical order. Most interestingly, our results indicate that the magnetic anisotropy does not decrease significantly as long as the deviations from perfect order are not too large. Moreover, we find that in certain cases a slight disorder can result in a higher anisotropy than for the fully ordered structure. We further analyze the correlation between the magneto-crystalline anisotropy and the orbital magnetic moment anisotropy, which allows to study the effect of the local chemical environment on both quantities, potentially enabling further optimization of the magneto-crystalline anisotropy with respect to chemical order and stoichiometric composition.
Almost $η$-Ricci and almost $η$-Yamabe solitons with torse-forming potential vector field
Creators: name: Blaga, Adara M.
name: Özgür, Cihan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We provide properties of almost $η$-Ricci and almost $η$-Yamabe solitons on submanifolds isometrically immersed into a Riemannian manifold $\left(\widetilde{M},\widetilde{g} \right)$ whose potential vector field is the tangential component of a torse-forming vector field on $\widetilde{M}$, treating also the case of a minimal or pseudo quasi-umbilical hypersurface. Moreover, we give necessary and sufficient conditions for an orientable hypersurface of the unit sphere to be an almost $η$-Ricci or an almost $η$-Yamabe soliton in terms of the second fundamental tensor field.
description: 25 pages
Understanding Linearity of Cross-Lingual Word Embedding Mappings
Creators: name: Peng, Xutan
name: Stevenson, Mark
name: Lin, Chenghua
name: Li, Chen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: The technique of Cross-Lingual Word Embedding (CLWE) plays a fundamental role in tackling Natural Language Processing challenges for low-resource languages. Its dominant approaches assumed that the relationship between embeddings could be represented by a linear mapping, but there has been no exploration of the conditions under which this assumption holds. Such a research gap becomes very critical recently, as it has been evidenced that relaxing mappings to be non-linear can lead to better performance in some cases. We, for the first time, present a theoretical analysis that identifies the preservation of analogies encoded in monolingual word embeddings as a necessary and sufficient condition for the ground-truth CLWE mapping between those embeddings to be linear. On a novel cross-lingual analogy dataset that covers five representative analogy categories for twelve distinct languages, we carry out experiments which provide direct empirical support for our theoretical claim. These results offer additional insight into the observations of other researchers and contribute inspiration for the development of more effective cross-lingual representation learning strategies.
Supporting Information from Anticipating infectious disease re-emergence and elimination: a test of early warning signals using empirically based models
Creators: name: Tredennick, Andrew T.
name: O’Dea, Eamon B.
name: Ferrari, Matthew J.
name: Park, Andrew W.
name: Rohani, Pejman
name: Drake, John M.
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: 10202 Biological Mathematics
subject: FOS: Mathematics

description: Timely forecasts of the emergence, re-emergence and elimination of human infectious diseases allow for proactive, rather than reactive, decisions that save lives. Recent theory suggests that a generic feature of dynamical systems approaching a tipping point—early warning signals (EWS) due to critical slowing down (CSD)—can anticipate disease emergence and elimination. Empirical studies documenting CSD in observed disease dynamics are scarce, but such demonstration of concept is essential to the further development of model-independent outbreak detection systems. Here, we use fitted, mechanistic models of measles transmission in four cities in Niger to detect CSD through statistical EWS. We find that several EWS accurately anticipate measles re-emergence and elimination, suggesting that CSD should be detectable before disease transmission systems cross key tipping points. These findings support the idea that statistical signals based on CSD, coupled with decision-support algorithms and expert judgement, could provide the basis for early warning systems of disease outbreaks.
Unresolved sideband photon recoil spectroscopy of molecular ions
Creators: name: Clausen, Emilie H.
name: Jarlaud, Vincent
name: Fisher, Karin
name: Meyer, Steffen
name: Solaro, Cyrille
name: Drewsen, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We reflect on the prospect of exploiting the recoil associated with absorption and emission of photons to perform spectroscopy of a single molecular ion. For this recoil to be detectable, the molecular ion is sympathetically cooled by a laser-cooled atomic ion to near their common quantum mechanical ground state within a trapping potential. More specifically, we present a general framework for simulating the expected photon recoil spectra in regimes where either the natural transition linewidth $Γ_t$ of the molecular ion or the spectral width $Γ_L$ of the exciting light source exceeds the motional frequencies of the two-ion system. To exemplify the framework, we present two complementary cases: spectroscopy of the broad 3s $^2$S$_{1/2}$ - 3p $^2$P$_{3/2}$ electronic transition ($Γ_t/2π= 41.8$ MHz) of a single $^{24}$Mg$^+$ ion at $λ=279.6$ nm by a narrow laser source ($Γ_L/2π\lesssim 1$ MHz) and mid-infrared vibrational spectroscopy of the very narrow $|v=0,J=1\rangle$ - $|v'=1,J'=0\rangle$ transition ($Γ_t/2π= 2.50 $ Hz) at $λ=6.17$ $μ$m in the $^1Σ^+$ electronic ground state of $^{24}$MgH$^+$ by a broadband laser source ($Γ_L/2π\gtrsim$ 50 MHz). The atomic ion $^{24}$Mg$^+$ has been picked to introduce a simple system to make comparisons with experimental results while still capturing most of the physics involved in electronic excitations of molecular ions.
description: 20 pages, 19 figures
$α$-connections in generalized geometry
Creators: name: Blaga, Adara M.
name: Nannicini, Antonella
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We consider a family of $α$-connections defined by a pair of generalized dual quasi-statistical connections $(\hat{\nabla},\hat{\nabla}^*)$ on the generalized tangent bundle $(TM\oplus T^*M, \check{h})$ and determine their curvature, Ricci curvature and scalar curvature. Moreover, we provide the necessary and sufficient condition for $\hat \nabla^*$ to be an equiaffine connection and we prove that if $h$ is symmetric and $\nabla h=0$, then $(TM\oplus T^*M, \check{h}, \hat{\nabla}^{(α)}, \hat{\nabla}^{(-α)})$ is a conjugate Ricci-symmetric manifold. Also, we characterize the integrability of a generalized almost product, of a generalized almost complex and of a generalized metallic structure w.r.t. the bracket defined by the $α$-connection. Finally we study $α$-connections defined by the twin metric of a pseudo-Riemannian manifold, $(M,g)$, with a non-degenerate $g$-symmetric $(1,1)$-tensor field $J$ such that $d^\nabla J=0$, where $\nabla$ is the Levi-Civita connection of $g$.
description: 29 pages
A colored Khovanov bicomplex
Creators: name: Ito, Noboru
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: In this note, we prove the existence of a tri-graded Khovanov-type bicomplex (Theorem 1.2). The graded Euler characteristic of the total complex associated with this bicomplex is the colored Jones polynomial of a link. The first grading of the bicomplex is a homological one derived from cabling of the link (i.e., replacing a strand of the link with several parallel strands); the second grading is related to the homological grading of ordinary Khovanov homology; finally, the third grading is preserved by the differentials, and corresponds to the degree of the variable in the colored Jones polynomial. In particular, we introduce a way to take a small cabling link diagram directly from a big cabling link diagram (Theorem 3.2). This is a refined version of arXiv:0907.5247.
description: 41 pages, 32 figures, 16 tables
title: Εφαρμογές νευρο-ασαφών συστημάτων σε φυσικές καταστροφές
title: Applications of neuro-fuzzy systems in natural disasters
Creators: name: Μαγκουρας Ιωαννης
Publisher: name: Technical University of Crete
Year: 2020

description: Η τεχνητή νοημοσύνη ανέκαθεν συγκέντρωνε ένα εξαιρετικά έντονο ενδιαφέρον τόσο σε θεωρητικό όσο και πρακτικό επίπεδο. Στις μέρες μας ωστόσο, αποκτά ακόμη μεγαλύτερη βαρύτητα δεδομένης της ραγδαίας τεχνολογικής εξέλιξης. Εξάλλου, τέτοιου είδους μοντέλα δύναται να χρησιμοποιηθούν σε ένα ευρύ φάσμα εφαρμογών. Η παρούσα εργασία διερευνά τη δυνατότητα χρήσης νευρο-ασαφών συστημάτων όσον αφορά την πρόβλεψη φυσικών καταστροφών, όπως οι πλημμύρες, οι σεισμοί, κλπ. Ο συνδυασμός ασαφούς λογικής και τεχνητών νευρωνικών δικτύων επιτρέπει την αποκόμιση της πλήρους ωφέλειας, αντιμετωπίζοντας παράλληλα τα μειονεκτήματα των επιμέρους προσεγγίσεων. Η επισκόπηση της σχετικής βιβλιογραφίας επιβεβαιώνει την υψηλή προσαρμοστικότητα των νευρο-ασαφών συστημάτων και αποδεικνύει την υψηλή προβλεπτική ικανότητα του μοντέλου ANFIS. Ωστόσο, για τη μέγιστη δυνατή αποτελεσματικότητα είναι απαραίτητη η μελέτη ενός μεγάλου αριθμού παραγόντων, βάσει ιστορικών στοιχείων, έτσι ώστε να εκπαιδευθεί κατάλληλα το κατά περίπτωση μοντέλο.
Based chord diagrams of spherical curves
Creators: name: Ito, Noboru
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: This paper demonstrates an approach for developing a framework to produce invariants of base-point-free generic spherical curves under some chosen local moves from Reidemeister moves using based chord diagrams. Our invariants not only contain Arnold's classical generic spherical curve invariant but also new invariants.
description: 21 pages, 21 figures, 15 tables
A cobordism realizing crossing change on $\mathfrak{sl}_2$ tangle homology and a categorified Vassiliev skein relation
Creators: name: Ito, Noboru
name: Yoshida, Jun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: In this paper, we discuss degree 0 crossing change on Khovanov homology in terms of cobordisms. Namely, using Bar-Natan's formalism of Khovanov homology, we introduce a sum of cobordisms that yields a morphism on complexes of two diagrams of crossing change, which we call the "genus-one morphism." It is proved that the morphism is invariant under the moves of double points in tangle diagrams. As a consequence, in the spirit of Vassiliev theory, taking iterated mapping cones, we obtain an invariant for singular tangles that extending sl(2) tangle homology; examples include Lee homology, Bar-Natan homology, and Naot's universal Khovanov homology as well as Khovanov homology with arbitrary coefficients. We also verify that the invariant satisfies categorified analogues of Vassiliev skein relation and the FI relation.
description: 35 pages, 5 figures. Changed title, Refinement of some parts
Gradient solitons on statistical manifolds
Creators: name: Blaga, Adara M.
name: Chen, Bang-Yen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 35C08, 35Q51, 53B05

description: We provide necessary and sufficient conditions for some particular couples $(g,\nabla)$ of pseudo-Riemannian metrics and affine connections to be statistical structures if we have gradient almost Einstein, almost Ricci, almost Yamabe solitons, or a more general type of solitons on the manifold. In particular cases, we establish a formula for the volume of the manifold and give a lower and an upper bound for the norm of the Ricci curvature tensor field.
description: 18 pages
dyphAI Dynamic pharmacophore modeling with AI: The latest tool for efficient screening of new acetylcholinesterase inhibitors - Supplementary Data 1
Creators: name: Hayek-Orduz, Yasser
name: Acevedo Castro, Dorian Armando
Publisher: name: Zenodo
Year: 2024

description: 1-RMSD paired calculations scripts

2-RMSD paired calculations heatmaps for 17 active site residues

3-Stability graphs for 50ns MD simulations

4-50ns MD simulations RMSD heatmaps

5-PDB files of 50 conformations

6-Stability graphs for 500ns MD simulations
Gauss diagram formulas of Vassiliev invariants of spatial 2-bouquet graphs
Creators: name: Ito, Noboru
name: Oyamaguchi, Natsumi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We introduce new formulas that are Vassiliev invariants of flat vertex isotopy classes of spatial 2-bouquet graphs, which are equivalent to 2-string links. Although any Gauss diagram formula of Vassiliev invariants of spatial 2-bouquet graphs in a 3-space has been unknown, this paper gives the first and simple example.
description: 10 pages, 7 figures, Typos were corrected