cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Apprendre les sciences en situation de tutorat
title: Apprendre les sciences en situation de tutorat
titleType: AlternativeTitle
Creators: name: Maradan, Sandrine
name: Pidoux, Fanny
Publisher: name: Unknown
Year: 0
Subjects: subject: Démarche d’investigation scientifique
subject: topogénèse
subject: tutorat
subject: coopération
subject: posture de l’élève
subject: posture de l’enseignant
subject: forme scolaire
subject: conflit cognitif

description: À travers ce travail de mémoire, notre but a été de s’approprier la modalité de tutorat afin d’en découvrir les spécificités et d’en prouver les bénéfices pour l’enseignement des sciences au primaire. La recherche a été effectuée sous forme d’étude de cas dans une classe de 4P aux mois de novembre et décembre 2018. Une séquence d’enseignement sur les animaux de la forêt respectant la démarche d’investigation scientifique et plaçant les élèves en tutorat a été mise en oeuvre. Deux binômes ont été filmés tout au long de la séquence et ces vidéos ont été analysés dans le but de repérer les modifications topogénétiques et les apprentissages réalisés en sciences. Les analyses des données mettent en évidence les apports du tutorat pour chaque intervenant - enseignant, tuteur, tutoré et groupe-classe. La discussion des résultats articule notre recherche avec les dires de chercheurs et met en exergue un modèle caractérisant les relations de tutorat.
Isoparametric foliations, a problem of Eells-Lemaire and conjectures of Leung
Creators: name: Qian, Chao
name: Tang, Zizhou
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this paper, two sequences of minimal isoparametric hypersurfaces are constructed via representations of Clifford algebras. Based on these, we give estimates on eigenvalues of the Laplacian of the focal submanifolds of isoparametric hypersurfaces in unit spheres. This improves results of [TY13] and [TXY14]. Eells and Lemaire [EL83] posed a problem to characterize the compact Riemannian manifold M for which there is an eigenmap from M to S^n. As another application of our constructions, the focal maps give rise to many examples of eigenmaps from minimal isoparametric hypersurfaces to unit spheres. Most importantly, by investigating the second fundamental forms of focal submanifolds of isoparametric hypersurfaces in unit spheres, we provide infinitely many counterexamples to two conjectures of Leung [Le91] (posed in 1991) on minimal submanifolds in unit spheres. Notice that these conjectures of Leung have been proved in the case that the normal connection is flat [HV01].
description: 28 pages, latest version, two references are added, to appear in Proceedings of the London Mathematical Society
title: "Une histoire genrée à l'école" : Analyse croisée des Moyens d'enseignement romands et de pratiques dans l'enseignement de l'histoire
title: "Une histoire genrée à l'école" : Analyse croisée des Moyens d'enseignement romands et de pratiques dans l'enseignement de l'histoire
titleType: AlternativeTitle
Creators: name: Morrison, Samuel
name: Manière, Julien
Publisher: name: Unknown
Year: 0
Subjects: subject: genre
subject: égalité
subject: représentation genrée
subject: stéréotype de genre
subject: activité didactique
subject: histoire

description: L’égalité des hommes et des femmes est un sujet d’actualité dans notre société. Cette problématique se manifeste aussi dans les classes pourtant lieux censés représenter l’équité. L’école dans notre contexte suisse romand, prône aujourd’hui l’égalité des chances de manière explicite notamment via les objectifs du Plan d’études romand vis-à-vis de l’égalité de genre. Or notre société a façonné au fil des années des normes auxquelles filles et garçons doivent se conformer. Ces normes sont représentées par exemple par les jouets, la littérature jeunesse et se retrouvent au sein des manuels scolaires. En effet, ces derniers transmettent des notions, et des images issues et façonnées par notre société. Il est donc logique que ces normes genrées se retrouvent dans les documents transmis aux élèves et renforcent ainsi les différences. Les enseignant.e.s, malgré eux, jouent également un rôle au sein de cette socialisation genrée. Ces derniers via leurs attitudes et leurs choix didactiques transmettent inconsciemment, des rôles stéréotypés que doivent tenir les filles et les garçons. Pour lutter contre cette différence, des ressources sont à disposition des enseignants. Or comment faire lorsque ces différences peuvent être renforcées via des notions disciplinaires ? C’est le cas de l’histoire qui tend à restreindre les notions concernant les femmes privilégiant celles des hommes. Mais inculquer aux élèves des notions se centrant quasiment que sur une moitié de l’humanité ne risque-t-il pas d’accroître les différences et de renforcer négativement leurs visions ? Cette recherche-action tentera de répondre via analyse des Moyens d’enseignement romands et de la mise en place d’une séquence didactique centrée sur les notions historiques transmises ainsi que sur le regard des élèves sur le genre au 21ème siècle. Une classe du canton de Vaud a participé aux activités proposées et nous a permis de récolter des informations afin de répondre aux interrogations ci-dessus.
Bulimus similaris J. Moricand 1856
Creators: name: Breure, Abraham S. H.
name: Tardy, Emmanuel
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Stylommatophora
Streptaxidae
Bulimus
Bulimus similaris

description: similaris, Bulimus, J. Moricand, 1856: 177, pl. 6 fig. 8.
Type locality: [Peru] Moyobamba. Syntypes: MHNG- INVE-63531 (7) (Bulimulidae) [B: fig. 51].
description: Published as part of Breure, Abraham S. H. & Tardy, Emmanuel, 2016, From the shadows of the past: Moricand senior and junior, two 19 th century naturalists from Geneva, with their newly described taxa and molluscan types, pp. 113-138 in Revue suisse de Zoologie 123 (1) on page 123, DOI: 10.5281/zenodo.46292
Helix (Helicigona) pyramidella var. spixiana S. Moricand 1836
Creators: name: Breure, Abraham S. H.
name: Tardy, Emmanuel
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Stylommatophora
Helicidae
Helix
Helix pyramidella
Spixiana, helix (helicigona) pyramidella

description: spixiana, Helix (Helicigona) pyramidella [var. ς], Moricand, 1836b: 419.
– Remarks. Not available name (infrasubspecific).
description: Published as part of Breure, Abraham S. H. & Tardy, Emmanuel, 2016, From the shadows of the past: Moricand senior and junior, two 19 th century naturalists from Geneva, with their newly described taxa and molluscan types, pp. 113-138 in Revue suisse de Zoologie 123 (1) on page 123, DOI: 10.5281/zenodo.46292
Basic Morse-Novikov cohomology for foliations
Creators: name: Ornea, Liviu
name: Slesar, Vladimir
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C12, 58A12, 53C21

description: In this paper we find sufficient conditions for the vanishing of the Morse-Novikov cohomology on Riemannian foliations. We work out a Bochner technique for twisted cohomological complexes, obtaining corresponding vanishing results. Also, we generalize for our setting vanishing results from the case of closed Riemannian manifolds. Several examples are presented, along with applications in the context of l.c.s. and l.c.K. foliations.
description: 21 pages. To appear in Mathematische Zeitschrift
Measuring the environment of a Cs qubit with dynamical decoupling sequences
Creators: name: Burgardt, Sabrina
name: Jäger, Simon B.
name: Feß, Julian
name: Hiebel, Silvia
name: Schneider, Imke
name: Widera, Artur
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report the experimental implementation of dynamical decoupling on a small, non-interacting ensemble of up to 25 optically trapped, neutral Cs atoms. The qubit consists of the two magnetic-insensitive Cs clock states $\left| F=3, m_F=0 \right>$ and $\left|F=4, m_F=0\right>$, which are coupled by microwave radiation. We observe a significant enhancement of the coherence time when employing Carr-Purcell-Meiboom-Gill (CPMG) dynamical decoupling. A CPMG sequence with ten refocusing pulses increases the coherence time of 16.2(9) ms by more than one order of magnitude to 178(2) ms. In addition, we make use of the filter function formalism and utilize the CPMG sequence to measure the background noise floor affecting the qubit coherence, finding a power-law noise spectrum $1/ω^α$ with $\mathitα = 0.89(2)$. This finding is in very good agreement with an independent measurement of the noise in the intensity of the trapping laser. Moreover, the measured coherence evolutions also exhibit signatures of low-frequency noise originating at distinct frequencies. Our findings point toward noise spectroscopy of engineered atomic baths through single-atom dynamical decoupling in a system of individual Cs impurities immersed in an ultracold $^{87}$Rb bath.
description: 10 pages, 8 figures, The data that support the findings of this study are available at the following URL/DOI: https://doi.org/10.5281/zenodo.7728140
Self-consistent theory for a plane wave in a moving medium and light-momentum criterion
Creators: name: Wang, Changbiao
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: 83, 78A25

description: A self-consistent theory is developed based on the principle of relativity for a plane wave in a moving non-dispersive, lossless, non-conducting, isotropic, uniform medium. A light-momentum criterion is set up for the first time, which states that the momentum of light in a medium is parallel to the wave vector in all inertial frames of reference. By rigorous analysis, novel basic properties of the plane wave are exposed: (a) Poynting vector does not necessarily represent the electromagnetic (EM) power flow when a medium moves; (b) Minkowski light momentum and energy constitute a Lorentz four-vector in a form of single EM-field cell or single photon, and Planck constant is a Lorentz invariant; (c) there is no momentum transfer taking place between the plane wave and the uniform medium, and the EM momentum conservation equation cannot be uniquely determined without resorting to the principle of relativity; and (d) when the medium moves opposite to the wave vector at a faster-than-dielectric light speed, negative frequency and negative EM energy density occur, with the plane wave becoming left-handed. Finally, a new physics of so-called "intrinsic Lorentz violation" is presented as well.
description: Published version. 18 pages, 2 figures. arXiv admin note: substantial text overlap with arXiv:1106.1163
Stability of Equivariant Vector Bundles over Toric Varieties
Creators: name: Dasgupta, Jyoti
name: Dey, Arijit
name: Khan, Bivas
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2020

description: We give a complete answer to the question of (semi)stability of tangent bundle on any nonsingular complex projective toric variety with Picard number 2 by using combinatorial criterion of (semi)stability of an equivariant sheaf. We also give a complete answer to the question of (semi)stability of tangent bundles on all toric Fano 4-folds with Picard number $\leq 3$ which are classified by Batyrev [V. V. Batyrev. On the classification of toric Fano $4$-folds. J. Math. Sci. (New York), 94(1):1021-1050, 1999]. We construct a collection of equivariant indecomposable rank 2 vector bundles on Bott towers and pseudo-symmetric toric Fano varieties. Furthermore, in case of Bott towers, we show the existence of an equivariant stable rank 2 vector bundle with certain Chern classes with respect to a suitable polarization.
description: DOCUMENTA MATHEMATICA, Vol 25 (2020), p. 1787-1833
Efficient two-parameter persistence computation via cohomology
Creators: name: Bauer, Ulrich
name: Lenzen, Fabian
name: Lesnick, Michael
Publisher: name: arXiv
Year: 2023
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55N31 (Primary), 62R40, 54-04 (Secondary)

description: Clearing is a simple but effective optimization for the standard algorithm of persistent homology (PH), which dramatically improves the speed and scalability of PH computations for Vietoris--Rips filtrations. Due to the quick growth of the boundary matrices of a Vietoris--Rips filtration with increasing dimension, clearing is only effective when used in conjunction with a dual (cohomological) variant of the standard algorithm. This approach has not previously been applied successfully to the computation of two-parameter PH. We introduce a cohomological algorithm for computing minimal free resolutions of two-parameter PH that allows for clearing. To derive our algorithm, we extend the duality principles which underlie the one-parameter approach to the two-parameter setting. We provide an implementation and report experimental run times for function-Rips filtrations. Our method is faster than the current state-of-the-art by a factor of up to 20.
description: This is an extended version of a conference paper that appeared at SoCG 2023, see https://drops.dagstuhl.de/opus/volltexte/2023/17865
Helix (Streptaxis) streptodon S. Moricand 1851
Creators: name: Breure, Abraham S. H.
name: Tardy, Emmanuel
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Stylommatophora
Helicidae
Helix
Helix streptodon

description: streptodon, Helix (Streptaxis), S. Moricand, 1851: 369, pl. 10 figs 1a-c.
Type locality: La province de Bahia (Brésil). Syntypes: MHNG-INVE-68696 (1) (Streptaxidae) [Figs 64-66].
description: Published as part of Breure, Abraham S. H. & Tardy, Emmanuel, 2016, From the shadows of the past: Moricand senior and junior, two 19 th century naturalists from Geneva, with their newly described taxa and molluscan types, pp. 113-138 in Revue suisse de Zoologie 123 (1) on page 123, DOI: 10.5281/zenodo.46292
Some remarks on K-lattices and the Adelic Heisenberg Group for CM curves
Creators: name: D'Andrea, Francesco
name: Franco, Davide
Publisher: name: arXiv
Year: 2014
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 11R56, 11R37, 11G15, 14K25, 58B34

description: We define an adelic version of a CM elliptic curve $E$ which is equipped with an action of the profinite completion of the endomorphism ring of $E$. The adelic elliptic curve so obtained is provided with a natural embedding into the adelic Heisenberg group. We embed into the adelic Heisenberg group the set of commensurability classes of arithmetic $1$-dimensional $\mathbb{K}$-lattices (here and subsequently, $\mathbb{K}$ denotes a quadratic imaginary number field) and define theta functions on it. We also embed the groupoid of commensurability modulo dilations into the union of adelic Heisenberg groups relative to a set of representatives of elliptic curves with $R$-multiplication ($R$ is the ring of algebraic integers of $\mathbb{K}$). We thus get adelic theta functions on the set of $1$-dimensional $\mathbb{K}$-lattices and on the groupoid of commensurability modulo dilations. Adelic theta functions turn out to be acted by the adelic Heisenberg group and behave nicely under complex automorphisms (Theorems 6.12 and 6.14).
description: 25 pages, no figures. Extensively revised version according to the comments of the reviewers
Helix (Cochlicella) subuliformis S. Moricand 1836
Creators: name: Breure, Abraham S. H.
name: Tardy, Emmanuel
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Stylommatophora
Helicidae
Helix
Helix subuliformis

description: subuliformis, Helix (Cochlicella), S. Moricand, 1836b: 427, pl. 2 fig. 3.
Type locality: [Brazil] St. Gonsalves, non loin de Bahia [Blanchet]. Probable syntypes: MHNG-INVE-66259 (7) (Subulinidae) [Fig. 67].
– Remarks. The material is labelled “ Bahia ” in J. Moricand’s hand, but none of the specimens are exactly matching the original dimensions; the material is considered as probable syntypes.
Four additional specimens are listed as ʻSyntypen’ in NMB 7649a.
description: Published as part of Breure, Abraham S. H. & Tardy, Emmanuel, 2016, From the shadows of the past: Moricand senior and junior, two 19 th century naturalists from Geneva, with their newly described taxa and molluscan types, pp. 113-138 in Revue suisse de Zoologie 123 (1) on page 123, DOI: 10.5281/zenodo.46292
Non-Archimedean Whittaker functions as characters: a probabilistic approach to the Shintani-Casselman-Shalika formula
Creators: name: Chhaibi, Reda
Publisher: name: arXiv
Year: 2014
Subjects: subject: Representation Theory (math.RT)
subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 11F70, 11F85, 60B15, 60J45, 60J50

description: For a reductive group $G$ over a non-Archimedean local field (e.g $GL_n( \mathbb{Q}_p )$ ), Jacquet's Whittaker function is essentially proportional to a character of an irreducible representation of the Langlands dual group $G^\vee( \mathbb{C} )$ ( a Schur function if $G = GL_n( \mathbb{Q}_p )$). We propose a probabilistic approach to this claim, known as the Shintani-Casselman-Shalika formula, when the group $G$ has at least one minuscule cocharacter in the coweight lattice. Our presentation goes along the following lines. Thanks to a minuscule random walk $W^{(z)}$ on the coweight lattice and a related random walk on the Borel subgroup, we establish a Poisson kernel formula for the non-Archimedean Whittaker function. The expression and its ingredients are similar to the one previously obtained by the author in the Archimedean case. A simple manipulation reduces the problem to evaluating the probability of $W^{(z)}$ never exiting the Weyl chamber. Then, an implementation of the reflection principle forces the appearance of the Weyl character formula and therefore retrieves characters of $G^\vee\left( \mathbb{C} \right)$. The construction of the random walk on the Borel subgroup requires some care. It is extracted from a spherical random walk whose increments have a distribution that can be understood as elements from the spherical Hecke algebra.
description: 31 pages ; 1 figure ; Archimedean companion paper is arXiv:1504.07321 ; v1: Preliminary ; v2: Submitted ; v3: Published
Higher-order Organization in the Human Brain from Matrix-Based Rényi's Entropy
Creators: name: Li, Qiang
name: Yu, Shujian
name: Madsen, Kristoffer H
name: Calhoun, Vince D
name: Iraji, Armin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Information Theory (cs.IT)
subject: Statistics Theory (math.ST)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Pairwise metrics are often employed to estimate statistical dependencies between brain regions, however they do not capture higher-order information interactions. It is critical to explore higher-order interactions that go beyond paired brain areas in order to better understand information processing in the human brain. To address this problem, we applied multivariate mutual information, specifically, Total Correlation and Dual Total Correlation to reveal higher-order information in the brain. In this paper, we estimate these metrics using matrix-based Rényi's entropy, which offers a direct and easily interpretable approach that is not limited by direct assumptions about probability distribution functions of multivariate time series. We applied these metrics to resting-state fMRI data in order to examine higher-order interactions in the brain. Our results showed that the higher-order information interactions captured increase gradually as the interaction order increases. Furthermore, we observed a gradual increase in the correlation between the Total Correlation and Dual Total Correlation as the interaction order increased. In addition, the significance of Dual Total Correlation values compared to Total Correlation values also indicate that the human brain exhibits synergy dominance during the resting state.
description: 5 pages, 3 figures; Accepted to Data Science and Learning Workshop: Unraveling the Brain. A satellite workshop of ICASSP 2023
title: Sanction éducative et punition : quel est le discours des élèves ?
title: Sanction éducative et punition : quel est le discours des élèves ?
titleType: AlternativeTitle
Creators: name: Malgioglio, Federica
name: Roth, Célia
Publisher: name: Unknown
Year: 0
Subjects: subject: Punition
subject: sanction éducative
subject: discours attendu
subject: discours produit
subject: confrontation
subject: ressentis

description: Ce travail traite des pratiques disciplinaires en enseignement primaire. Les ouvrages explicitent les définitions de la punition et de la sanction éducative sans pour autant se pencher forcément sur le ressenti des élèves. Notre objectif est d’identifier le discours des élèves face à la sanction éducative et à la punition. La sanction éducative est une pratique visant la bienveillance et l’équité tandis que la punition stoppe les comportements en atteignant psychologiquement ou physiquement un individu. La problématique du mémoire est : comment les élèves perçoivent-ils la punition et la sanction éducative ? Les focales telles que la prise de position, les sentiments et le discours produit permettent d’éclaircir cette question. Ce qui ressort de ce travail est la confrontation entre le discours produit des élèves et le discours attendu. Ce dernier se base sur les aspects plus conceptuels des deux pratiques. Nous découvrons alors que les élèves ne perçoivent aucune distinction du point de vue lexical. En revanche, une différence se trouve au niveau des ressentis. Deux situations ont permis de récolter les données à analyser. Les propos des élèves constituent cette prise de données. Les analyses démontrent l’importance de donner du sens aux gestes professionnels afin qu’ils n’impactent pas les élèves négativement. Elles mettent également l’accent sur les sentiments provoqués chez eux suite aux différentes pratiques employées en classe.
Monotonicity of the Scalar Curvature of the Quantum Exponential Family for Transverse-Field Ising Chains
Creators: name: Nakamura, Takemi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The monotonicity of the scalar curvature of the state space equipped with the Bogoliubov-Kubo-Mori metric under more mixing a state is an important conjecture called the Petz conjecture. From the standpoint of quantum statistical mechanics, the quantum exponential family, a special submanifold of the state space, is central rather than the full state space. In this contribution, we investigate the monotonicity of the scalar curvature of the submanifold with respect to temperature for transverse-field Ising chains in various sizes and find that the monotonicity breaks down for the chains in finite sizes, whereas the monotonicity seems to hold if the chain is non-interacting or infinite-size. Our results suggest that finite-size effects can appear in the curvature through monotonicity with respect to majorization.
description: 8 pages, 4 figures
Cohomogeneity One Manifolds with Singly Generated Rational Cohomology
Creators: name: DeVito, Jason
name: Kennard, Lee
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2020

description: We classify simply connected, closed cohomogeneity one manifolds with singly generated or $4$-periodic rational cohomology and positive Euler characteristic.
description: DOCUMENTA MATHEMATICA, Vol 25 (2020), p. 1835-1863
title: Die nachhaltige Nutzung von Kühlsystemen in öffentlichen Gebäuden
Creators: name: Krisper, Melanie
Publisher: name: TU Wien
Year: 2022
Subjects: subject: Nachhaltigkeit
subject: Kühlsysteme
subject: Öffentliche Gebäude
subject: Kältemaschinen
subject: Haustechnik
subject: Ineffizienzen

description: Kühlsysteme werden in den unterschiedlichsten Bereichen der Wirtschaft eingesetzt. Der primäre Anwendungsbereich ist der Abtransport von Prozesswärme, die im Produktionsablauf anfällt. Das richtige Kühlsystem auszuwählen ist von vielen Faktoren und Einflüssen abhängig. Neben den ausschlaggebenden technischen Parametern, wie Temperatur und Leistung des Kühlsystems, hängt die Wahl des passenden Kühlsystems von den örtlich verfügbaren Ressourcen ab, denn die Errichtung und das Betreiben, sowohl von gewerblichen und industriellen Großgebäuden haben zusätzlichen Anforderungen zu entsprechen. Vor allem müssen diese Kühlsysteme unter dem Blickwinkel einer raschen und preisgünstigen Planung und Errichtung, einer einfachen Wartung, längerfristigen und flexiblen Nutzung, wie auch im Bezug der Energieeffizienzent sprechen. Diese Masterthese setzt sich mit der Thematik der nachhaltigen Nutzung von Kühlsystemen, vor allem im medizinischen Bereich, an öffentlichen Universitäten auseinander. Die Hauptaugenmerke liegen hier auf der umfassenden Beschreibung von Kühlsystemen und ihren Komponenten sowie dem Betrieb und der Vermeidung von Kühlverlusten an Hochsommertagen, da speziell an diesen Tagen große Kapazitäten an Kühlleistungen aufgrund ineffizienter Nutzung, mangelnder technischer Betriebsführung, mangelnder Wartung, Überdimensionierung der Anlagen etc., verloren gehen können.
Covariant description of isothermic surfaces
Creators: name: Tafel, Jacek
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences
subject: 53C42, 53A35

description: We present a covariant formulation of the Gauss-Weingarten equations and the Gauss-Mainardi-Codazzi equations for surfaces in 3-dimensional curved spaces. We derive a coordinate invariant condition on the first and second fundamental form which is locally necessary and sufficient for the surface to be isothermic. We show how to construct isothermic coordinates.
description: 11 pages
Analysis of the D-wave $Σ$-type charmed baryon states with the QCD sum rules
Creators: name: Wang, Zhi-Gang
name: Lu, Fei
name: Liu, Yang
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct the $Σ$-type currents to investigate the D-wave charmed baryon states with the QCD sum rules systematically. The predicted masses $M=3.35^{+0.13}_{-0.18}\,\rm{GeV}$ ($3.33^{+0.13}_{-0.16}\,\rm{GeV}$), $3.34^{+0.14}_{-0.18}\,\rm{GeV}$ ($3.35^{+0.13}_{-0.16}\,\rm{GeV}$) and $3.35^{+0.12}_{-0.13}\,\rm{GeV}$ ($3.35^{+0.12}_{-0.14}\,\rm{GeV}$) for the $Ω_c(0,2,{\frac{1}{2}}^+)$, $Ω_c(0,2,{\frac{3}{2}}^+)$ and $Ω_c(0,2,{\frac{5}{2}}^+)$ states are in excellent agreement with the experimental data $ 3327.1\pm1.2 \mbox{ MeV}$ from the LHCb collaboration, and support assigning the $Ω_c(3327)$ to be the $Σ$-type D-wave $Ω_c$ state with the spin-parity $J^P={\frac{1}{2}}^+$, ${\frac{3}{2}}^+$ or ${\frac{5}{2}}^+$.
description: 26 pages, 13 figures
Dynamics on Trees of Spheres
Creators: name: Arfeux, Matthieu
Publisher: name: arXiv
Year: 2014
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We introduce the notion of dynamically marked rational maps. We study sequences of analytic conjugacy classes of rational maps which diverge in moduli space. In particular, we are interested in the notion of rescaling limits introduced by Jan Kiwi. In order to deal with those, we introduce the notion of dynamical covers between trees of spheres for which a periodic sphere corresponds to a rescaling limit. We then recover results of Jan Kiwi regarding rescaling limits.
The Bredon-Landweber Region in $C_2$-Equivariant Stable Homotopy Groups
Creators: name: Guillou, Bertrand J.
name: Isaksen, Daniel C.
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2020

description: We use the $C_2$-equivariant Adams spectral sequence to compute part of the $C_2$-equivariant stable homotopy groups $\pi^{C_2}_{n,n}$. This allows us to recover results of Bredon and Landweber on the image of the geometric fixed-points map $\pi^{C_2}_{n,n} \rightarrow \pi_0$. We also recover results of Mahowald and Ravenel on the Mahowald root invariants of the elements $2^k$.
description: DOCUMENTA MATHEMATICA, Vol 25 (2020), p. 1865-1880
Anticipating the XRISM search for the decay of resonantly produced sterile neutrino dark matter
Creators: name: Lovell, Mark R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The sterile neutrino ($N_1$) features in multiple extensions of the standard model and is a compelling dark matter candidate, especially as the decay of $N_1$ with mass $m_\mathrm{s}=7.1\mathrm{keV}$ is a possible source for the unexplained $3.55\mathrm{keV}$ X-ray line reported in galaxy clusters. This particle will be accessible to the XRISM X-ray mission over the next 12 months. We revisit the physics behind $N_1$ and the uncertainty in its parameters. We compare predictions for the $m_{s}=7.1\mathrm{keV}$ $N_1$ mixing angle, $\sin^2(2θ)$, and half-mode mass, $M_\mathrm{hm}$, as described in the $ν$MSM standard model extension to existing X-ray observations and structure formation constraints. The strongest available constraints rule out $N_1$ as a dark matter candidate, and a more optimistic reading of the data prefers $\sin^2(2θ)=5\times10^{-11}$ and $M_\mathrm{hm}=3.5\times10^{8}M_{\odot}$. We highlight that the most promising upcoming opportunity for a detection is to find a line of velocity dispersion $\sim500\mathrm{kms}^{-1}$ in the Virgo cluster with XRISM, and then draw up a list of future objects of study to determine: (i) whether the line is from dark matter generally, and (ii) if from dark matter, whether that candidate is indeed $N_1$.
description: 13 pages, 6 figures. Accepted version. Identified error in previous version for CLASS calculation, corrected in this version. Contact: m.r.lovell@durham.ac.uk
Surface properties and scaling behavior of a generalized ballistic deposition model in (1+1)-dimension
Creators: name: Mal, Baisakhi
name: Ray, Subhankar
name: Shamanna, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The surface exponents, the scaling behavior and the bulk porosity of a generalized ballistic deposition (GBD) model are studied. In nature, there exist particles with varying degrees of stickiness ranging from completely non-sticky to fully sticky. Such particles may adhere to any one of the successively encountered surfaces, depending on a sticking probability %should have the possibility of sticking to any of the %allowed points of contact on the surface with a sticking probability that is governed by the underlying stochastic mechanism. The microscopic configurations possible in this model are much larger than those allowed in existing models of ballistic deposition and competitive growth models that seek to mix ballistic and random deposition processes. In this article, we find the scaling exponents for surface width and porosity for the proposed GBD model. In terms of scaled width $\widetilde{W}$ and scaled time $\tilde{t}$, the numerical data collapse on to a single curve, demonstrating successful scaling with sticking probability p and system size L. Similar scaling behavior is also found for the porosity.
description: 7 pages, 18 figures, To appear in Physical Review E, Accepted on 27 Jan 2016
On Anomalous Lieb-Robinson Bounds for the Fibonacci XY Chain
Creators: name: Damanik, David
name: Lemm, Marius
name: Lukic, Milivoje
name: Yessen, William
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: Spectral Theory (math.SP)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We rigorously prove a new kind of anomalous (or sub-ballistic) Lieb-Robinson bound for the isotropic XY chain with Fibonacci external magnetic field at arbitrary coupling. It is anomalous in that the usual exponential decay in $x-vt$ is replaced by exponential decay in $x-vt^α$ with $0
description: 21 pages, Final version to appear in J. Spectr. Theory
Flexural behavior of Hybrid Glulam-FRP beam during and after a fire
Creators: name: Zaben, Abdulrahman
name: Gattas, Joseph Michael
name: Maluk, Cristian
Publisher: name: figshare
Year: 2023
Subjects: Fire safety engineering
Structural engineering

description: This work considers an experimental investigation of rationalized manufacturing techniques for hybrid Glulam beams combined with Fibre Reinforced Polymers (FRP) for the manufacturing of floor timber structures with improved fire and serviceability performance. In essence, introducing FRP with a relatively higher residual capacity at elevated temperatures, compared to timber, compensates for timber's loss of strength and stiffness at elevated temperatures or even when charring during a fire. This is a shift in how FRP materials are currently constrained in load-bearing applications where structural integrity must be maintained during or after a fire. In applications where a certain fire performance is needed for the load-bearing mass timber structure of a building, the end-result of this work aims at setting the basis for a prototype Hybrid Glulam-FRP (HGF) beam that could be used to deliver load-bearing floor timber structures with enhanced fire performance. Experimental tests were conducted in four-point bending arrangement at ambient conditions, and during or after exposing the midspan section of the beams to a fire.
A Systematic Approach for Inertial Sensor Calibration of Gravity Recovery Satellites and Its Application to Taiji-1 Mission
Creators: name: Zhang, Haoyue
name: Xu, Peng
name: Ye, Zongqi
name: Ye, Dong
name: Qiang, Li-E
name: Luo, Ziren
name: Qi, Keqi
name: Wang, Shaoxin
name: Cai, Zhiming
name: Wang, Zuolei
name: Lei, Jungang
name: Wu, Yueliang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: High-precision inertial sensors or accelerometers can provide us references of free-falling motions in gravitational field in space. They serve as the key payloads for gravity recovery missions such as the CHAMP, the GRACE-type missions, and the planned Next Generation Gravity Missions. In this work, a systematic method of electrostatic inertial sensor calibrations for gravity recovery satellites is suggested, which is applied to and verified with the Taiji-1 mission. With this method, the complete operating parameters including the scale factors, the center of mass offset vector and the intrinsic biased acceleration can be precisely calibrated with only two sets of short-term in-orbit experiments. Taiji-1 is the first technology demonstration satellite of the "Taiji Program in Space", which, in its final extended phase in 2022, could be viewed as operating in the mode of a high-low satellite-to-satellite tracking gravity mission. Based on the calibration principles, swing maneuvers with time span about 200 s and rolling maneuvers for 19 days were conducted by Taiji-1 in 2022. The inertial sensor's operating parameters are precisely re-calibrated with Kalman filters and are updated to the Taiji-1 science team. Data from one of the sensitive axis is re-processed with the updated operating parameters, and the performance is found to be slightly improved compared with former results. This approach could be of high reference value for the accelerometer or inertial sensor calibrations of the GFO, the Chinese GRACE-type mission, and the Next Generation Gravity Missions. This could also shed some light on the in-orbit calibrations of the ultra-precision inertial sensors for future GW space antennas because of the technological inheritance between these two generations of inertial sensors.
description: 24 pages, 19 figures
Profinite Groups with a Cyclotomic $p$-Orientation
Creators: name: Quadrelli, Claudio
name: Weigel, Thomas Stefan
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2020

description: Let $p$ be a prime. A continuous representation $\theta\colon G\to\mathrm{GL}_1(\mathbb{Z}_p)$ of a profinite group $G$ is called a cyclotomic $p$-orientation if for all open subgroups $U\subseteq G$ and for all $k,n\geq1$ the natural maps $H^k(U,\mathbb{Z}_p(k)/p^n)\to H^k(U,\mathbb{Z}_p(k)/p)$ are surjective. Here $\mathbb{Z}_p(k)$ denotes the $\mathbb{Z}_p$-module of rank 1 with $U$-action induced by $\theta\vert_U^k$. By the Rost-Voevodsky theorem, the cyclotomic character of the absolute Galois group $G_{\mathbb{K}}$ of a field $\mathbb{K}$ is, indeed, a cyclotomic $p$-orientation of $G_{\mathbb{K}}$. We study profinite groups with a cyclotomic $p$-orientation. In particular, we show that cyclotomicity is preserved by several operations on profinite groups, and that Bloch-Kato pro-$p$ groups with a cyclotomic $p$-orientation satisfy a strong form of Tits' alternative and decompose as semi-direct product over a canonical abelian closed normal subgroup.
description: DOCUMENTA MATHEMATICA, Vol 25 (2020), p. 1881-1916
Tracking Dynamic Point Processes on Networks
Creators: name: Hall, Eric C.
name: Willett, Rebecca M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Machine Learning (stat.ML)
subject: Information Theory (cs.IT)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Cascading chains of events are a salient feature of many real-world social, biological, and financial networks. In social networks, social reciprocity accounts for retaliations in gang interactions, proxy wars in nation-state conflicts, or Internet memes shared via social media. Neuron spikes stimulate or inhibit spike activity in other neurons. Stock market shocks can trigger a contagion of volatility throughout a financial network. In these and other examples, only individual events associated with network nodes are observed, usually without knowledge of the underlying dynamic relationships between nodes. This paper addresses the challenge of tracking how events within such networks stimulate or influence future events. The proposed approach is an online learning framework well-suited to streaming data, using a multivariate Hawkes point process model to encapsulate autoregressive features of observed events within the social network. Recent work on online learning in dynamic environments is leveraged not only to exploit the dynamics within the underlying network, but also to track the network structure as it evolves. Regret bounds and experimental results demonstrate that the proposed method performs nearly as well as an oracle or batch algorithm.
Vertex adjacencies in the set covering polyhedron
Creators: name: Aguilera, Néstor E.
name: Katz, Ricardo D.
name: Tolomei, Paola B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 90C57, 52B05, 05C65

description: We describe the adjacency of vertices of the (unbounded version of the) set covering polyhedron, in a similar way to the description given by Chvatal for the stable set polytope. We find a sufficient condition for adjacency, and characterize it with similar conditions in the case where the underlying matrix is row circular. We apply our findings to show a new infinite family of minimally nonideal matrices.
description: Minor revision, 22 pages, 3 figures
HDCICuba: Primer proyecto académico de Humanidades Digitales en Cuba (2017-2021)
Creators: name: Quintana, Dra C. Ania R. Hernández
name: Trinquete, Lic. Amanda Terrero
name: Rodríguez, Adrian Martínez
Publisher: name: Zenodo
Year: 2022
Subjects: humanidades digitales
laboratorios colaborativos
Cuba
Ciencias de la Información

description: Se presenta actividad científica de la primera fase de desarrollo del Grupo de Investigación Académica Humanidades Digitales y Ciencias de la Información en Cuba de la Facultad de Comunicación de la Universidad de La Habana y su sistema de laboratorios colaborativos para la transversalización de los valores de las Humanidades Digitales en el campo académico y profesional de las Ciencias de la Información en Cuba.
title: Analiza statystyczna danych do prognozowania produkcji energii elektrycznej w wybranym systemie fotowoltaicznym
Creators: name: Kolańska-Płuska, Joanna
name: Gallus, Piotr
Publisher: name: Publishing House of Poznan University of Technology
Year: 2022

description: Poznan University of Technology Academic Journals. Electrical Engineering, 107, 83-94
Ramification Divisors of General Projections
Creators: name: Deopurkar, Anand
name: Duryev, Eduard
name: Patel, Anand
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2020

description: We study ramification divisors of projections of a smooth projective variety onto a linear space of the same dimension. We prove that for a large class of varieties, the ramification divisors of such projections vary in a maximal dimensional family. We study the map that associates to a linear projection its ramification divisor. By a degeneration argument involving (linked) limit linear series of higher rank, we show that this map is dominant for most (but not all!) varieties of minimal degree.
description: DOCUMENTA MATHEMATICA, Vol 25 (2020), p. 1917-1952
Peeling potatoes near-optimally in near-linear time
Creators: name: Cabello, Sergio
name: Cibulka, Josef
name: Kynčl, Jan
name: Saumell, Maria
name: Valtr, Pavel
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computational Geometry (cs.CG)
subject: Data Structures and Algorithms (cs.DS)
subject: Metric Geometry (math.MG)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: I.3.5; F.2.2
subject: 52A10, 52A27, 52A38, 52A40

description: We consider the following geometric optimization problem: find a convex polygon of maximum area contained in a given simple polygon $P$ with $n$ vertices. We give a randomized near-linear-time $(1-\varepsilon)$-approximation algorithm for this problem: in $O(n( \log^2 n + (1/\varepsilon^3) \log n + 1/\varepsilon^4))$ time we find a convex polygon contained in $P$ that, with probability at least $2/3$, has area at least $(1-\varepsilon)$ times the area of an optimal solution. We also obtain similar results for the variant of computing a convex polygon inside $P$ with maximum perimeter. To achieve these results we provide new results in geometric probability. The first result is a bound relating the probability that two points chosen uniformly at random inside $P$ are mutually visible and the area of the largest convex body inside $P$. The second result is a bound on the expected value of the difference between the perimeter of any planar convex body $K$ and the perimeter of the convex hull of a uniform random sample inside $K$.
description: 30 pages, 7 figures; minor revision. Preliminary version was presented at SoCG 2014
Behaviour of motorcyclists and bicyclists before and after a road safety campaign, China: Supplemental file
Creators: name: Ning, Peishan
name: Peng, Ruisha
name: Zong, Huiying
name: Schwebel, David
name: Xie, Cifu
name: He, Jieyi
name: Cheng, Peixia
name: Li, Li
name: Rao, Zhenzhen
name: Hu, Guoqing
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 440706
subject: Health policy

description: Behaviour of motorcyclists and bicyclists before and after a road safety campaign, China: Supplemental file
xTC: An efficient treatment of three-body interactions in transcorrelated methods
Creators: name: Christlmaier, Evelin Martine
name: Schraivogel, Thomas
name: Ríos, Pablo López
name: Alavi, Ali
name: Kats, Daniel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: An efficient implementation for approximate inclusion of the three-body operator arising in transcorrelated methods via exclusion of explicit three-body components (xTC) is presented and tested against results in the "HEAT" benchmark set [A. Tajti et al., J. Chem. Phys. 121, 11599 (2004)]. Using relatively modest basis sets and computationally simple methods, total, atomization, and formation energies within near-chemical accuracy from HEAT results were obtained. The xTC ansatz reduces the nominal scaling of the three-body part of transcorrelation by two orders of magnitude to O(N^5) and can readily be used with almost any quantum chemical correlation method.
Helix tarapotonensis J. Moricand 1858
Creators: name: Breure, Abraham S. H.
name: Tardy, Emmanuel
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Stylommatophora
Helicidae
Helix
Helix tarapotonensis

description: tarapotonensis, Helix, J. Moricand, 1858: 450, pl. 13 fig. 2.
Type locality: [Peru] Tarapoto. Syntype: MHNG-INVE-72711 (1) (Pleurodontidae) [Figs 73- 76].
– Remarks. Moricand junior did not state on how many specimens his description was based.
description: Published as part of Breure, Abraham S. H. & Tardy, Emmanuel, 2016, From the shadows of the past: Moricand senior and junior, two 19 th century naturalists from Geneva, with their newly described taxa and molluscan types, pp. 113-138 in Revue suisse de Zoologie 123 (1) on page 123, DOI: 10.5281/zenodo.46292
Research Software and the people behind it
Creators: name: Fritzsch, Bernadette
Publisher: name: Zenodo
Year: 2022
Subjects: Research Software, RSE

description: Research software has been part of scientific work for many years. But their development has been hidden for a long time and has often not been adequately appreciated. Research software has only recently become the focus of broader interest and its importance for the quality of research is succinctly formulated by the slogan "Better software - better research". For all those who develop software in the research environment and for research use, the term research software engineer RSE has become common for some time. The community of RSEs has developed as a grassroots movement, which also has a national chapter in Germany with the de-RSE e.V. The association and its activities will be presented in the talk.
Electroweak fragmentation functions for dark matter annihilation
Creators: name: Cavasonza, Leila Ali
name: Krämer, Michael
name: Pellen, Mathieu
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Electroweak corrections can play a crucial role in dark matter annihilation. The emission of gauge bosons, in particular, leads to a secondary flux consisting of all Standard Model particles, and may be described by electroweak fragmentation functions. To assess the quality of the fragmentation function approximation to electroweak radiation in dark matter annihilation, we have calculated the flux of secondary particles from gauge-boson emission in models with Majorana fermion and vector dark matter, respectively. For both models, we have compared cross sections and energy spectra of positrons and antiprotons after propagation through the galactic halo in the fragmentation function approximation and in the full calculation. Fragmentation functions fail to describe the particle fluxes in the case of Majorana fermion annihilation into light fermions: the helicity suppression of the lowest-order cross section in such models cannot be lifted by the leading logarithmic contributions included in the fragmentation function approach. However, for other classes of models like vector dark matter, where the lowest-order cross section is not suppressed, electroweak fragmentation functions provide a simple, model-independent and accurate description of secondary particle fluxes.
description: 18 pages, matches the published version