cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
High-Gradient Operators in the psl(2|2) Gross-Neveu Model
Creators: name: Cagnazzo, Alessandra
name: Schomerus, Volker
name: Tlapák, Václav
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been observed more than 25 years ago that sigma model perturbation theory suffers from strongly RG-relevant high-gradient operators. The phenomenon was first seen in 1-loop calculations for the O(N) vector model and it is known to persist at least to two loops. More recently, Ryu et al. suggested that a certain deformation of the psl(N|N) WZNW-model at level k = 1, or equivalently the psl(N|N) Gross-Neveu model, could be free of RG-relevant high-gradient operators and they tested their suggestion to leading order in perturbation theory. In this note we establish the absence of strongly RG-relevant high-gradient operators in the psl(2|2) Gross-Neveu model to all loops. In addition, we determine the spectrum for a large subsector of the model at infinite coupling and observe that all scaling weights become half-integer. Evidence for a conjectured relation with the CP^1|2 sigma model is not found.
description: 14 pages
An undecidability result for the asymptotic theory of $p$-adic fields
Creators: name: Kartas, Konstantinos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic (math.LO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Fix a prime $p$. We prove that the set of sentences true in all but finitely many finite extensions of $\mathbb{Q}_p$ is undecidable in the language of valued fields with a cross-section. The proof goes via reduction to characteristic $p$, adapting Pheidas' proof of the undecidability of $\mathbb{F}_p(\!(t)\!)$ with a predicate for powers of $t$. This answers a variant of a question of Derakhshan-Macintyre.
description: 15 pages
Six Outbursts of Comet 46P/Wirtanen
Creators: name: Kelley, Michael S. P.
name: Farnham, Tony L.
name: Li, Jian-Yang
name: Bodewits, Dennis
name: Snodgrass, Colin
name: Allen, Johannes
name: Bellm, Eric C.
name: Coughlin, Michael W.
name: Drake, Andrew J.
name: Duev, Dmitry A.
name: Graham, Matthew J.
name: Kupfer, Thomas
name: Masci, Frank J.
name: Reiley, Dan
name: Walters, Richard
name: Dominik, M.
name: Jørgensen, U. G.
name: Andrews, A.
name: Bach-Møller, N.
name: Bozza, V.
name: Burgdorf, M. J.
name: Campbell-White, J.
name: Dib, S.
name: Fujii, Y. I.
name: Hinse, T. C.
name: Hundertmark, M.
name: Khalouei, E.
name: Longa-Peña, P.
name: Rabus, M.
name: Rahvar, S.
name: Sajadian, S.
name: Skottfelt, J.
name: Southworth, J.
name: Tregloan-Reed, J.
name: Unda-Sanzana, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Cometary activity is a manifestation of sublimation-driven processes at the surface of nuclei. However, cometary outbursts may arise from other processes that are not necessarily driven by volatiles. In order to fully understand nuclear surfaces and their evolution, we must identify the causes of cometary outbursts. In that context, we present a study of mini-outbursts of comet 46P/Wirtanen. Six events are found in our long-term lightcurve of the comet around its perihelion passage in 2018. The apparent strengths range from $-0.2$ to $-1.6$ mag in a 5" radius aperture, and correspond to dust masses between $\sim10^4$ to $10^6$ kg, but with large uncertainties due to the unknown grain size distributions. However, the nominal mass estimates are the same order of magnitude as the mini-outbursts at comet 9P/Tempel 1 and 67P/Churyumov-Gerasimenko, events which were notably lacking at comet 103P/Hartley 2. We compare the frequency of outbursts at the four comets, and suggest that the surface of 46P has large-scale ($\sim$10-100 m) roughness that is intermediate to that of 67P and 103P, if not similar to the latter. The strength of the outbursts appear to be correlated with time since the last event, but a physical interpretation with respect to solar insolation is lacking. We also examine Hubble Space Telescope images taken about 2 days following a near-perihelion outburst. No evidence for macroscopic ejecta was found in the image, with a limiting radius of about 2-m.
description: Accepted for publication in The Planetary Science Journal. 33 pages, 11 figures, 3 tables
Stress buffering after physical activity engagement: An experience sampling study
Creators: name: Gerstberger, Leo
name: Blanke, Elisabeth S
name: Keller, Jan
name: Brose, Annette
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: experience sampling methodology
subject: physical activity
subject: positive and negative affect
subject: stress
subject: stress buffering
subject: 150 Psychologie

description: Objectives While encountering daily hassles is a normative experience, it poses a threat to individuals' daily affective well-being. However, physical activity engagement may help to reduce the current stress-related impact on affective well-being (i.e. stress buffering), which we investigate in this study. Furthermore, we examined the possible moderating role of people's global stress context (i.e. exposure to major life events and chronic stress) on this within-person stress-buffering effect. Design We approached these ideas using six-times-a-day experience sampling assessments over a period of 22 days. Methods Drawing on a broad national sample of 156 middle-aged adults from the EE-SOEP-IS study, we aimed to elucidate the naturally occurring within-person dynamics of current stress, physical activity engagement, and momentary affect within individuals' everyday lives. Major life events and chronic stress were measured as between-person variables. Results Multilevel analyses revealed significant within-person associations of current stress and physical activity engagement with momentary affect. Stress-related negative affect was lower when individuals engaged in physical activity, in accordance with the idea of a within-person stress-buffering effect of physical activity engagement. For individuals exposed to more severe major life events, the stress-buffering effect of physical activity engagement for negative affect was lower. Chronic stress did not moderate the within-person stress-buffering effect. Conclusions Overall, results add to the existing literature that links physical activity to increased stress resilience and emphasizes the need for taking the global between-person stress context into account.
Viscosity spectral function of a scale invariant non-relativistic fluid from holography
Creators: name: Schaefer, Thomas
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study the viscosity spectral function of a holographic 2+1 dimensional fluid with Schroedinger symmetry. The model is based on a twisted compactification of $Ads_5\times S_5$. We numerically compute the spectral function of the stress tensor correlator for all frequencies, and analytically study the limits of high and low frequency. We compute the shear viscosity, the viscous relaxation time, and the quasi-normal mode spectrum in the shear channel. We find a number of unexpected results: The high frequency behavior is governed by a fractional 1/3 power law, the viscous relaxation time is negative, and the quasi-normal mode spectrum in the shear channel is not doubled.
description: 17 pages, two figures
Préliminaires iconographiques propres à déclancher le plaisir de l'étude des fabliaux à une classe du Secondaire II
Creators: name: Python, Manuela
Publisher: name: Unknown
Year: 0
Subjects: subject: fabliaux
subject: Moyen Âge
subject: théâtre
subject: comique
subject: iconographie

description: Ce travail consiste en l’élaboration d’une séquence d’enseignement utilisant l’iconographie comme ressource didactique et support introductif à l’étude des fabliaux. Dans l’introduction, nous passons en revue l’attrait que pourrait susciter l’étude de ces textes, bien particuliers, au Secondaire II, mais aussi quelques difficultés qui leur sont inhérentes et qui expliqueraient peut-être pourquoi ils sont davantage utilisés comme matière d’enseignement au Secondaire I. Un des écueils majeurs serait l’exotisme, pour les élèves, du contexte socio-historique. Afin de rapprocher ces textes de notre contemporanéité, le recours à des oeuvres iconographiques illustrant la vie quotidienne, les us et les moeurs du bas Moyen Âge, immerge d’une manière plaisante, les élèves dans cette époque lointaine. Une séquence d’enseignement est préparée à partir de quelques miniatures, tirées des Très Riches Heures du Duc de Berry, des Noces paysannes et du Combat de Carême et de Carnaval de Bruegel, de La Nef des fous, de Jérôme Bosch et des Époux Arnolfini de Jan Van Eyck. Cette immersion par l’image est enrichissante car elle permet aux élèves de s’approprier de nouvelles connaissances sur cette société, qui leur serviront par la suite pour analyser et commenter ces textes en leur fournissant des exemples, des analogies et des associations. Ces nouveaux savoirs ayant été acquis de manière ludique, la motivation des élèves est restée soutenue et l’interaction entre image et texte a accru leur compétence pour l’analyse littéraire des fabliaux
description: Mémoire professionnel, Diplôme d'enseignement pour le degré secondaire II
Persistente Identifikatoren und Open Access
Creators: name: Palek, Stephanie
Publisher: name: Zenodo
Year: 2020
Subjects: PID, Persisitent Identification, URN

description: Persistente Identifikatoren (PI) sind im Kontext von Open Access sowohl für Textpublikationen als auch für Datenpublikationen unverzichtbar. Sie stellen sicher, dass diese online dauerhaft auffindbar und dadurch überhaupt erst zitierfähig sind und bilden so das Grundgerüst für das Publizieren im Open Access. Viele Repositorien vergeben daher mittlerweile automatisch einen persistenten Identifikator (meist DOI oder URN), doch gibt es auch Ausnahmen. Dabei ist die Vergabe von PIs auch für Infrastrukturen gerade im Kontext der Entwicklungen einer Nationalen Forschungsdateninfrastruktur sowie der European Open Science Cloud unerlässlich. Um sicherzustellen, dass Open Access Publikationen zitierfähig und dauerhaft zugänglich sind, ist es daher sowohl für Dienstleister als auch für Forschende wichtig, die Prinzipien hinter PI-Systemen sowie deren Funktionsweise zu verstehen. Dieser Beitrag stellt daher das Thema der persistenten Identifikatoren vor, gibt einen Überblick über gängige Lösungen und erklärt Unterschiede zwischen verschiedenen PI-Systemen. Am Beispiel des URN-Services der Deutschen Nationalbibliothek werden die Grundlagen und Arbeitsweise eines PI-Services dargestellt und das Thema zudem in den Kontext der FAIR-Prinzipien gestellt und in Bezug auf aktuelle Entwicklungen betrachtet.
Matrix optimization under random external fields
Creators: name: Dembo, Amir
name: Zeitouni, Ofer
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider the quadratic optimization problem $$F_n^{W,h}:= \sup_{x \in S^{n-1}} ( x^T W x/2 + h^T x )\,, $$ with $W$ a (random) matrix and $h$ a random external field. We study the probabilities of large deviation of $F_n^{W,h}$ for $h$ a centered Gaussian vector with i.i.d. entries, both conditioned on $W$ (a general Wigner matrix), and unconditioned when $W$ is a GOE matrix. Our results validate (in a certain region) and correct (in another region), the prediction obtained by the mathematically non-rigorous replica method in Y. V. Fyodorov, P. Le Doussal, J. Stat. phys. 154 (2014).
Geodesic complexity of homogeneous Riemannian manifolds
Creators: name: Mescher, Stephan
name: Stegemeyer, Maximilian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geometric Topology (math.GT)
subject: Algebraic Topology (math.AT)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 55M30, 53C22

description: We study the geodesic motion planning problem for complete Riemannian manifolds and investigate their geodesic complexity, an integer-valued isometry invariant introduced by D. Recio-Mitter. Using methods from Riemannian geometry, we establish new lower and upper bounds on geodesic complexity and compute its value for certain classes of examples with a focus on homogeneous Riemannian manifolds. Methodically, we study properties of stratifications of cut loci and use results on their structures for certain homogeneous manifolds obtained by T. Sakai and others.
description: Revised version, 35 pages, 1 figure. To appear in Algebraic & Geometric Topology
Dissipative evolution of quantum Gaussian states
Creators: name: Linowski, Tomasz
name: Teretenkov, Alexander
name: Rudnicki, Łukasz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent works on quantum resource theories of non-Gaussianity, which are based upon the type of tools available in contemporary experimental settings, put Gaussian states and their convex combinations on equal footing. Motivated by this, in this article, we derive a new model of dissipative time evolution based on unitary Lindblad operators which, while does not preserve the set of Gaussian states, preserves the set of their convex combinations, i.e. so-called quantum Gaussian states. As we demonstrate, the considered evolution proves useful both as a description for random scattering and as a tool in dissipator engineering.
description: 12 pages
Les habiletés cognitives à mobiliser a minima dans la résolution des tâches d'analyse mathématique des examens de maturité
Creators: name: Terra, Antonio
Publisher: name: Unknown
Year: 0
Subjects: subject: mathématiques
subject: analyse de tâches
subject: habiletés cognitives
subject: examens de maturité
subject: résolution algorithmique
subject: compréhension

description: Mémoire professionnel, Diplôme d'enseignement pour le degré secondaire II
NuSTAR observations and broadband spectral energy distribution modeling of the millisecond pulsar binary PSR J1023+0038
Creators: name: Li, K. L.
name: Kong, A. K. H.
name: Takata, J.
name: Cheng, K. S.
name: Tam, P. H. T.
name: Hui, C. Y.
name: Jin, Ruolan
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the first hard X-ray (3-79 keV) observations of the millisecond pulsar (MSP) binary PSR J1023+0038 using NuSTAR. This system has been shown transiting between a low-mass X-ray binary (LMXB) state and a rotation-powered MSP state. The NuSTAR observations were taken in both LMXB state and rotation-powered state. The source is clearly seen in both states up to ~79 keV. During the LMXB state, the 3-79 keV flux is about a factor of 10 higher that in the rotation-powered state. The hard X-rays show clear orbital modulation during the X-ray faint rotation-powered state but the X-ray orbital period is not detected in the X-ray bright LMXB state. In addition, the X-ray spectrum changes from a flat power-law spectrum during the rotation-powered state to a steeper power-law spectrum in the LMXB state. We suggest that the hard X-rays are due to the intra-binary shock from the interaction between the pulsar wind and the injected material from the low-mass companion star. During the rotation-powered MSP state, the X-ray orbital modulation is due to Doppler boosting of the shocked pulsar wind. At the LMXB state, the evaporating matter of the accretion disk due to the gamma-ray irradiation from the pulsar stops almost all the pulsar wind, resulting the disappearance of the X-ray orbital modulation.
description: 8 pages, 6 figures; accepted for publication in ApJ
Risk contributions of lambda quantiles
Creators: name: Ince, Akif
name: Peri, Ilaria
name: Pesenti, Silvana
Publisher: name: arXiv
Year: 2021
Subjects: subject: Risk Management (q-fin.RM)
subject: FOS: Economics and business

description: Risk contributions of portfolios form an indispensable part of risk adjusted performance measurement. The risk contribution of a portfolio, e.g., in the Euler or Aumann-Shapley framework, is given by the partial derivatives of a risk measure applied to the portfolio profit and loss in direction of the asset units. For risk measures that are not positively homogeneous of degree 1, however, known capital allocation principles do not apply. We study the class of lambda quantile risk measures that includes the well-known Value-at-Risk as a special case but for which no known allocation rule is applicable. We prove differentiability and derive explicit formulae of the derivatives of lambda quantiles with respect to their portfolio composition, that is their risk contribution. For this purpose, we define lambda quantiles on the space of portfolio compositions and consider generic (also non-linear) portfolio operators. We further derive the Euler decomposition of lambda quantiles for generic portfolios and show that lambda quantiles are homogeneous in the space of portfolio compositions, with a homogeneity degree that depends on the portfolio composition and the lambda function. This result is in stark contrast to the positive homogeneity properties of risk measures defined on the space of random variables which admit a constant homogeneity degree. We introduce a generalised version of Euler contributions and Euler allocation rule, which are compatible with risk measures of any homogeneity degree and non-linear but homogeneous portfolios. These concepts are illustrated by a non-linear portfolio using financial market data.
Climate Change and the proposed Canadian Northern Corridor
Creators: name: Fawcett, David
name: Pearce, Tristan
name: Ford, James
Publisher: name: The School of Public Policy Publications
Year: 2020

description: The Canadian Northern Corridor is a concept for a multi-modal (road, rail, pipeline, electrical and communication) transmission corridor through northern Canada. This paper reviews scientific evidence about potential impacts of climate change in northern Canada and implications for future corridor development. The results show that climate change impacts are already being experienced through northern Canada and are expected to continue and potentially worsen in the future. Permafrost thaw, sea ice melt, extreme weather events, and changes in coastal processes (e.g. sea level rise, erosion), among other impacts, threaten the construction, maintenance, and operation of infrastructure within the corridor. Climate change impacts are likely to affect the feasibility and costs of some infrastructure, and create on-going challenges to operations. Climate change impacts are highly localized and a disturbance at one chokepoint in the corridor could compromise the operation of the whole corridor. More research is needed to examine climate change impacts at local scales to understand the characteristics of the physical environment and how it is changing, as well as how existing human activities may conflict with the corridor. Efforts are needed to engage relevant Indigenous peoples, Indigenous organisations, and local communities early in corridor discussions to identify if a corridor is desirable and relevant to them, and whether it can be developed in a manner that sustains livelihoods, culture, health, and well-being.
description: The School of Public Policy Publications, Vol. 13 (2020)
Delicate Ferromagnetism in MnBi$_6$Te$_{10}$
Creators: name: Yan, Chenhui
name: Zhu, Yanglin
name: Miao, Leixin
name: Fernandez-Mulligan, Sebastian
name: Green, Emanuel
name: Mei, Ruobing
name: Tan, Hengxin
name: Yan, Binghai
name: Liu, Chao-Xing
name: Alem, Nasim
name: Mao, Zhiqiang
name: Yang, Shuolong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Tailoring magnetic orders in topological insulators is critical to the realization of topological quantum phenomena. An outstanding challenge is to find a material where atomic defects lead to tunable magnetic orders while maintaining a nontrivial topology. Here, by combining magnetization measurements, angle-resolved photoemission spectroscopy, and transmission electron microscopy, we reveal disorder-enabled, tunable magnetic ground states in MnBi$_6$Te$_{10}$. In the ferromagnetic phase, an energy gap of 15 meV is resolved at the Dirac point on the MnBi$_2$Te$_4$ termination. In contrast, antiferromagnetic MnBi$_6$Te$_{10}$ exhibits gapless topological surface states on all terminations. Transmission electron microscopy and magnetization measurements reveal substantial Mn vacancies and Mn migration in ferromagnetic MnBi$_6$Te$_{10}$. We provide a conceptual framework where a cooperative interplay of these defects drives a delicate change of overall magnetic ground state energies, and leads to tunable magnetic topological orders. Our work provides a clear pathway for nanoscale defect-engineering towards the realization of topological quantum phases.
description: 22 pages, 3 figures
On the Difference between FOPT and CIPT for Hadronic Tau Decays
Creators: name: Hoang, André H.
name: Regner, Christoph
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this article we review the results of our recent work on the difference between the Borel representations of tau hadronic spectral function moments obtained with the CIPT and FOPT methods. For the presentation of the theoretical results we focus on the large-$β_0$ approximation, where all expressions can be written down in closed form, and we comment on the generalization to full QCD. The results may explain the discrepancy in the behavior of the FOPT and CIPT series that has been the topic of intense discussions in previous literature and which represents a major part of the theoretical uncertainties in current strong coupling determinations from hadronic tau decays. The findings also imply that the OPE corrections for FOPT and CIPT differ and that the OPE corrections for CIPT do not have standard form.
description: 21 pages, 5 figures; contribution to EPJ ST "Renormalons and Hyperasymptotics in QCD"; conclusions extended, final journal version
EXCEDE Technology Development III: First Vacuum Tests
Creators: name: Belikov, Ruslan
name: Lozi, Julien
name: Pluzhnik, Eugene
name: Hix, Troy T.
name: Bendek, Eduardo
name: Thomas, Sandrine J.
name: Lynch, Dana H.
name: Mihara, Roger
name: Irwin, J. Wes
name: Duncan, Alan L.
name: Greene, Thomas P.
name: Guyon, Olivier
name: Kendrick, Richard L.
name: Smith, Eric H.
name: Witteborn, Fred C.
name: Schneider, Glenn
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: This paper is the third in the series on the technology development for the EXCEDE (EXoplanetary Circumstellar Environments and Disk Explorer) mission concept, which in 2011 was selected by NASA's Explorer program for technology development (Category III). EXCEDE is a 0.7m space telescope concept designed to achieve raw contrasts of 1e6 at an inner working angle of 1.2 l/D and 1e7 at 2 l/D and beyond. This will allow it to directly detect and spatially resolve low surface brightness circumstellar debris disks as well as image giant planets as close as in the habitable zones of their host stars. In addition to doing fundamental science on debris disks, EXCEDE will also serve as a technological and scientific precursor for any future exo-Earth imaging mission. EXCEDE uses a Starlight Suppression System (SSS) based on the PIAA coronagraph, enabling aggressive performance. We report on our continuing progress of developing the SSS for EXCEDE, and in particular (a) the reconfiguration of our system into a more flight-like layout, with an upstream deformable mirror and an inverse PIAA system, as well as a LOWFS, and (b) testing this system in a vacuum chamber, including IWA, contrast, and stability performance. The results achieved so far are 2.9e-7 contrast between 1.2-2.0 l/D and 9.7e-8 contrast between 2.0-6.0 l/D in monochromatic light; as well as 1.4e-6 between 2.0-6.0 l/D in a 10% band, all with a PIAA coronagraph operating at an inner working angle of 1.2 l/D. This constitutes better contrast than EXCEDE requirements (in those regions) in monochromatic light, and progress towards requirements in broadband light. Even though this technology development is primarily targeted towards EXCEDE, it is also germane to any exoplanet direct imaging space-based telescopes because of the many challenges common to different coronagraph architectures and mission requirements.
description: 12 pages, 12 figures, to be published in proceedings of SPIE Astronomical Telescopes + Instrumentation (2014)
Les sports funs dans les gymnases vaudois
Creators: name: Duvillard, Roxane
Publisher: name: Unknown
Year: 0
Subjects: subject: Sports funs
subject: Education physique et sportive
subject: Gymnases vaudois
subject: Chefs de file
subject: Plaisir
subject: Plein-air

description: Actuellement, une multitude de « nouvelles » pratiques sportives attrayantes séduisent les jeunes. Ces pratiques sont appelées communément sports funs, ce sont principalement des sports libres pratiqués hors institutions sportives ou clubs sportifs pour le plaisir et sanscompétition officielle. Partant de ce constat j’ai été intéressée à chercher quelle est la place de ses pratiques quiséduisent les jeunes dans l’enseignement de l’éducation physique au secondaire II. Pour cela, un questionnaire a été élaboré et envoyé aux chefs de file d’EPS des gymnases vaudois afin de regarder si ces « nouveaux sports » appelés sports funs sont enseignés dans lesétablissements du secondaire II. Mais aussi de savoir quelle est la vision des chefs de file desgymnases vaudois sur ces nouvelles pratiques. Les résultats mettent en avant que les chefs de file définissent un sport fun comme étant unsport dans lequel la notion de plaisir est centrale, la liberté est importante et qui estrelativement récent. Les chefs de file enseignent un sport fun particulier de leur choix car ilsont le matériel à disposition et ils aiment cette activité et veulent la partager avec leurs élèves.Cependant très peu de sports considérés comme funs par une majorité de chefs de file sontenseignés dans les gymnases vaudois. Seuls trois sports enseignés dans 8 gymnases sont considérés comme funs : le beach volleyball, l’ultimate et le cirque. Cinq autres sports sont considérés comme funs mais très peu enseignés (dans 5 gymnases et moins) ce sont le snowboard, le canoë, la randonnée en peaux de phoque, le surf et la planche à voile. Dans l’enseignement de l’EPS dans les gymnases vaudois la place des disciplines traditionnelles reste prépondérante et les sports funs ne sont que peu enseignés. Précisons toutde même que la définition d’un sport fun est subjective et varie entre les chefs de file interrogés tout comme entre les auteurs lus pour ce travail.
description: Mémoire professionnel, Diplôme d'enseignement pour le degré secondaire II
Unsupervised Parallel Extraction based Texture for Efficient Image Representation
Creators: name: Abdelsamea, Mohammed M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: SOM is a type of unsupervised learning where the goal is to discover some underlying structure of the data. In this paper, a new extraction method based on the main idea of Concurrent Self-Organizing Maps (CSOM), representing a winner-takes-all collection of small SOM networks is proposed. Each SOM of the system is trained individually to provide best results for one class only. The experiments confirm that the proposed features based CSOM is capable to represent image content better than extracted features based on a single big SOM and these proposed features improve the final decision of the CAD. Experiments held on Mammographic Image Analysis Society (MIAS) dataset.
description: arXiv admin note: substantial text overlap with arXiv:1408.4143
title: Comment réussir les cinq dernières minutes d'un cours
title: enjeux et pratiques liés à la gestion de classe
titleType: Subtitle
Creators: name: Ceppi, Marie
Publisher: name: Unknown
Year: 0
Subjects: subject: conclusion
subject: gestion de classe
subject: planification
subject: rituel
subject: ritualisation
subject: temps

description: Si la question de l'importance des cinq premières minutes d'un cours, véritable « sas d'entrée »pour les élèves, a été abordée par de nombreux théoriciens de l'éducation, il semble que laproblématique des cinq dernières minutes du cours ait été beaucoup moins traitée par ceux-ci.C'est en partant de cette constatation que nous avons décidé de nous questionner sur lespratiques liées à la phase conclusive d'un cours. Il s'agit dans un premier temps d'étudier quels sont les apports théoriques sur la question afinde déceler les enjeux de cette problématique. Dans une volonté de lier celle-ci à la question dela gestion de classe, nous étudions dans un deuxième temps les causes et conséquences d'une fin de cours manquée, ainsi que les solutions qui peuvent y être apportées. L'analyse de questionnaires portant sur cette problématique nous permet finalement d'analyser les pratiquesdes enseignants et d'en tirer des nouvelles pistes de réflexion. La problématique de la gestion de classe lors des cinq dernières minutes d'un cours comportetrois aspects, elle est liée à la planification de l'enseignant, sa gestion de la classe, et rejoint finalement les aspects didactiques de son enseignement. En effet, il revient à l'enseignant de préparer au mieux cette phase conclusive tout en respectant le temps imparti à celle-ci. Les dernières minutes constituant un moment critique du déroulement de la période, l'enseignant devra se montrer vigilant afin de maintenir un climat de classe propice à l'apprentissage.Finalement, l'aspect didactique devra également être pris en compte, la conclusion d'un cours doit être liée au contenu du cours ou à la discipline. Il faut que ces dernières minutes fassent sens auprès des élèves afin de faciliter la compréhension du contenu du cours et maintenir la motivation des élèves.
description: Mémoire professionnel, Diplôme d'enseignement pour le degré secondaire II
PresenceSense: Zero-training Algorithm for Individual Presence Detection based on Power Monitoring
Creators: name: Jin, Ming
name: Jia, Ruoxi
name: Kang, Zhoayi
name: Konstantakopoulos, Ioannis C.
name: Spanos, Costas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: I.5.2; I.5.4; H.4.1

description: Non-intrusive presence detection of individuals in commercial buildings is much easier to implement than intrusive methods such as passive infrared, acoustic sensors, and camera. Individual power consumption, while providing useful feedback and motivation for energy saving, can be used as a valuable source for presence detection. We conduct pilot experiments in an office setting to collect individual presence data by ultrasonic sensors, acceleration sensors, and WiFi access points, in addition to the individual power monitoring data. PresenceSense (PS), a semi-supervised learning algorithm based on power measurement that trains itself with only unlabeled data, is proposed, analyzed and evaluated in the study. Without any labeling efforts, which are usually tedious and time consuming, PresenceSense outperforms popular models whose parameters are optimized over a large training set. The results are interpreted and potential applications of PresenceSense on other data sources are discussed. The significance of this study attaches to space security, occupancy behavior modeling, and energy saving of plug loads.
description: BuildSys 2014
Measurement-device-independent nonlinear entanglement witnesses
Creators: name: Sen, Kornikar
name: Srivastava, Chirag
name: Sen, Ujjwal
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Entanglement witnesses are one of the most effective methods to detect entanglement. It is known that nonlinear entanglement witnesses provide better entanglement detection than their linear counterparts, in that the former detect a strictly larger subset of entangled states than the latter. Whether linear or nonlinear, the method is measurement-device dependent, so that imperfect measurements may cause false certification of entanglement in a shared state. Measurement-device-independent entanglement witnesses provide an escape from such measurement dependence of the entanglement detection for linear entanglement witnesses. Here we present measurement-device-independent nonlinear entanglement witnesses for non-positive partial transpose entangled states as well as for bound entangled states with positive partial transpose. The constructed measurement-device-independent nonlinear entanglement witnesses certify the entanglement of the same sets of entangled states as their device-dependent parents do, and therefore are better than the linear entanglement witnesses, device-independent or otherwise.
description: v2: 8 pages, no figures, examples added
Integración de la movilidad no motorizada en la zona dorada de la ciudad de Mexicali, B.C. :
Creators: name: Maciel Torres, Mayra
Publisher: name: Universidad Autónoma de Baja California, Mexicali.
Year: 2023
Subjects: subject: Urbanismo||México Calzada Cetys Mexicali, Baja California||Tesis y disertaciones académicas||lemb||Planificación urbana||México Calzada Cetys Mexicali, Baja California||Tesis y disertaciones académicas
subject: HT169.M4 M32 2023

description: En la ciudad de Mexicali, B.C. la composición de las vialidades presenta un desequilibrio en las formas de desplazamiento con la exclusión de la movilidad no motorizada, lo que provoca el aumento del uso del vehículo particular y con ello el congestionamiento en las horas de máxima demanda sobre las avenidas principales de la ciudad, incluida la Calzada Cetys, en la zona dorada de la ciudad. En donde no existe un programa parcial de desarrollo urbano para esta área que involucre la movilidad urbana sustentable. Por lo que la investigación se basa en la siguiente pregunta: ¿Cómo se puede atraer a usuarios de la movilidad no motorizada a la Calzada Cetys en la zona dorada de Mexicali para reestructurar la composición vial? El objetivo de la investigación será evaluar la integración de la movilidad no motorizada al considerar un enfoque ambiental, de transporte y de desarrollo urbano. Se involucra el análisis de la accesibilidad de la zona, el flujo de tránsito actual y aspectos de atractividad urbana, así como la temperatura para la movilidad peatonal y ciclista en ciudades con clima extremo con la finalidad de inducir el tráfico de la movilidad no motorizada en la Calzada Cetys.
Nord-Süd-, Süd-Süd- und Ost-Süd-Beziehungen im Zeichen der Entwicklungshilfe-, Blockfreien- und Abrüstungsproblematik
Creators: name: Weggel, Oskar
Publisher: name: China aktuell
Year: 2023

description: China aktuell, China aktuell - August 1981
Multiphysic modeling and numerical simulation of injection pultrusion processes: impregnation flow, heat-transfer and stress-strain analysis
Creators: name: (:Unkn) Unknown
Publisher: name: Universita degli studi di Salerno
Year: 2020
Subjects: subject: ING-IND/16 TECNOLOGIE E SISTEMI DI LAVORAZIONE

description: 2018 - 2019
description: The present thesis focuses on the study and the modeling of the behaviors occurring in injection pultrusion processes to produce fiber reinforced thermoset polymers. The high market appeal of pultruded profiles and the cost-effectiveness of the process led the pultrusion production to a constant growth in the last twenty years. The key factors determining the success of this technique are the continuity nature of the process the flexibility in material choice and the high customizability of the fibrous reinforcing architecture. The injection pultrusion technique is the evolution of the conventional pultrusion process. The main difference between the two techniques stands in the way to impregnate the fibrous reinforcement with the resin. Indeed, in injection pultrusion, the pressurized resin is forced through the fibers within a closed injection chamber. The main advantage of this technique with respect to the conventional one consists in a better controllable filling of the reinforcement. Moreover, this version of the process remarkably reduces the direct contact between the resin and working environment, benefiting the operators. Despite the wide spreading of the pultrusion technique, in many cases the set of the operative parameters is defined by trial and error approach, on the base of the experience of the process designer. The main reason of this are the high number of process parameters and the presence of variables not easily definable and controllable, e.g. the degree of cure of the resin system or the exothermal heat released. The present thesis proposes a modeling approach to predict the main material behaviors in pultrusion. The modeling methodology has been structured in four steps, namely the matrix-reinforcement system characterization, the modeling of the impregnating flow, the modeling of the thermochemical evolution along the pultrusion die and the mechanical modeling of the stress-strain fields and the pulling force. The numerical models are validated by experimental results. [edited by Author]
Repercusiones sociales en los procesos de transformación urbana de la Plaza del Mariachi /
Creators: name: González Arteche, Haydee
Publisher: name: Universidad Autónoma de Baja California, Mexicali.
Year: 2023
Subjects: subject: Urbanismo||México Plaza el Mariachi Mexicali, Baja California||Tesis y disertaciones académicas||lemb||Planificación urbana||México Plaza el Mariachi Mexicali, Baja California||Tesis y disertaciones académicas
subject: HT169.M4 G65 2023

description: Los procesos sociales son parte fundamental para el estudio de las ciudades, porque a partir de estos se definen los espacios que hay en ellas. Sin embargo, el auge que existe por mejorar dichos espacios a través de proyectos o políticas urbanas deja de lado el factor social que los ha definido y solo parten de intereses políticos o económicos. La ciudad de Mexicali no es la excepción. Dicha ciudad se sitúa en la frontera norte de México y, a diferencia del resto de las ciudades mexicanas, el crecimiento urbano de las que se encuentran en la frontera norte ha estado influenciado por las ciudades de Estados Unidos. La presente investigación se enfocó en analizar un espacio público localizado en la zona conocida como Centro Histórico. Esta zona llevaba años en deterioro y, debido a la cercanía que tiene con la línea fronteriza se caracterizaba por ser un espacio transitado por sujetos relacionados con el fenómeno migratorio. La situación de deterioro que se presentaba en la zona, al igual que su historia, lo convertían en un espacio ideal para ejercer el poder a través de proyectos y políticas urbanas. Esta investigación se encargó de analizar las repercusiones en los procesos sociales de la Plaza del Mariachi, derivados de la implementación de un proyecto urbano realizado en el año 2020 por parte del gobierno local. La estrategia metodológica priorizó el enfoque cualitativo y, a través de una revisión documental, recorridos de observación en sitio y entrevistas semiestructuradas, se analizó la incidencia social que tuvo la implementación de este proyecto. Los resultados mostraron que el proyecto se enfocó principalmente en generar una mayor percepción de seguridad y control de los visitantes, dejando de lado los usos previos que ya se le daban al espacio, partiendo solo de intereses políticos y económicos, es decir, relaciones de poder que solo favorecen a unos cuantos y excluyen o segregan a los que no generan un ingreso económico favorable para los encargados de los proyectos. Hay que recordar que, el espacio público y la ciudad se define por las personas que la utilizan, es decir, los espacios en la ciudad se construyen a partir de los usos sociales que las personas les dan. En este sentido, no debería pensarse la rehabilitación, regeneración o renovación de un espacio solo desde el aspecto material, pues solo generan espacios que perpetuán la exclusión de otros.
Sphaleron bound in some nonstandard cosmology scenarios
Creators: name: Loc, Ngo Phuc Duc
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the first scenario, we revise the upper bound of the cutoff scale of the dimension-six potential Higgs operator required for a successful electroweak baryogenesis in the case of a modified expansion history caused by the existence of a non-interacting scalar field at the time phase transition happens. The upper bound 860 GeV of the cutoff scale in the conventional case can be improved to 1 TeV in the modified expansion case under certain conditions. In the second scenario, we consider the Randall-Sundrum type II model. We show that the lower bound of the five-dimensional Planck scale in this model, which is determined from the validity of Newtonian gravitational potential at small distance, turns out to be crucial in eliminating this model as a viable candidate to satisfy the sphaleron bound; however, again modifying the expansion history by including a non-interacting scalar field at the electroweak scale can then make this model satisfy the sphaleron bound with a certain parameter space.
description: 16 pages, 6 figures, 1 table
Hidden-Charm Tetraquarks and Charged Zc States
Creators: name: Zhao, Lu
name: Deng, Wei-Zhen
name: Zhu, Shi-Lin
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Experimentally several charged axial-vector hidden-charm states were reported. Within the framework of the color-magnetic interaction, we have systematically considered the mass spectrum of the hidden-charm and hidden-bottom tetraquark states. It is impossible to accommodate all the three charged states $Z_c(3900)$, $Z_c(4025)$ and $Z_c(4200)$ within the axial vector tetraquark spectrum simultaneously. Not all these three states are tetraquark candidates. Moreover, the eigenvector of the chromomagnetic interaction contains valuable information of the decay pattern of the tetraquark states. The dominant decay mode of the lowest axial vector tetraquark state is $J/ψπ$ while its $D^*\bar{D}$ and $\bar{D}^*D^*$ modes are strongly suppressed, which is in contrast with the fact that the dominant decay mode of $Z_c(3900)$ and $Z_c(4025)$ is $\bar{D}D^*$ and $\bar{D}^*D^*$ respectively. We emphasize that all the available experimental information indicates that $Z_c(4200)$ is a very promising candidate of the lowest axial vector hidden-charm tetraquark state.
title: Enseignement de type transmissif ou socio-constructiviste ?
title: une comparaison entre deux séquences d'enseignement de droit au Gymnase
titleType: Subtitle
Creators: name: Dutoit, Laure
Publisher: name: Unknown
Year: 0
Subjects: subject: transmissif
subject: socio-constructiviste
subject: travail de groue
subject: séquence d’enseignement
subject: efficacité
subject: droit

description: Le but de ce mémoire est de comparer deux démarches d’enseignement – l’une qualifiée detransmissive et l’autre inspirée du modèle socio-constructiviste – dans l’enseignement dudroit. Dans la démarche « transmissive », l’enseignant explique la théorie aux élèves, puis ces derniers effectuent une série d’exercices d’application. Cette démarche a été utilisée avec deux classes de première année, voie maturité, au niveau gymnasial, afin d’enseigner un chapitre sur le droit des obligations. Lors de la séquence dite « socio-constructiviste », menéeavec deux autres classes parallèles, les élèves reconstruisent des éléments théoriques du même chapitre de droit, à travers les différentes étapes d’un travail de groupe. C’est en comparant les résultats des élèves à un test commun, en étudiant un questionnaire sur l’appréciation par élèves des travaux de groupe et en analysant les productions des élèves obtenues lors de la séquence « socio constructiviste » que l’efficacité des deux démarches d’enseignement peut être évaluée. L’analyse des résultats du test effectué par les élèves a montré qu’il n’y avait pas dedifférence significative au niveau de l’efficacité des deux démarches d’enseignement. Cetteconclusion cependant assez forte doit être nuancée par deux éléments : la formulation des questions du test (qui suit une logique « transmissive ») et la possibilité laissée aux élèves ayant suivi la démarche « socio-constructiviste » de réviser le cours avec un polycopié. Les analyses plus qualitatives montrent que la démarche « socio-constructiviste » entraîne des compétences que la démarche dite transmissive n’exerce pas : des compétences juridiques,des compétences analytiques et de synthèses et des compétences interpersonnelles par le fait de travailler en groupe. De plus, les élèves sembleraient apprécier cette manière de travailler. La conclusion de ce mémoire est qu’aucune de ces deux démarches d’enseignement ne devrait être considérée comme la panacée, mais plutôt comme des démarches complémentaires, à utiliser afin de pouvoir mieux adapter la séquence d’enseignement au contenu et afin d’offrir un enseignement varié aux élèves.
description: Mémoire professionnel, Diplôme d'enseignement pour le degré secondaire II
Le burnout des élèves
Creators: name: Simoncini, Fabio
Publisher: name: Unknown
Year: 0
Subjects: subject: Burnout
subject: élèves
subject: stress
subject: facteur de risque
subject: facteur de protection
subject: dépression

description: Le syndrome du burnout a été étudié pour la première fois en 1974. Il désigne un état d’épuisement professionnel lié au stress du travail. Depuis, il s’est appliqué à plein d’autres type de population, dont, dernièrement, à celui des élèves : ceux-ci sont vus comme exerçantun métier, le « métier d’élève ». Ce syndrome est étudié selon trois dimensions : 1) unépuisement attribuable aux demandes de l’école 2) une attitude cynique et détachée vis-à-visde l’école et 3) un sentiment d’inadéquation face aux exigences de l’école. Outre le fait que le burnout est un phénomène important chez les élèves (certaines études donnent 10 à 15% d’élèves en burnout), une conséquence de ce syndrome est le risque que l’élève entre en dépression. Afin de mieux prévenir le burnout, une liste exhaustive des facteurs de risque (facteurs pouvant augmenter le risque de burnout des élèves) et facteurs de protections (facteurs pouvant diminuer le risque de burnout des élèves) est donnée, avec comme principaux éléments le genre (le fait d’être une fille est un facteur de risque), et le contexte scolaire. Dans ce dernier élément, l’enseignante ou enseignant à un rôle important, dans le sens où sonattitude aura une grande influence sur le développement du burnout chez l’élève : s’il arrive àdévelopper une relation positive (motivation des élèves, stimulation des élèves), l’enseignanteou enseignant sera alors un facteur de protection. Nous regarderons ensuite une étude sur le burnout des élèves de secondaire I en suisse romande avec une discussion sur les résultats de cette étude, en comparaison d’autres résultats connus.
description: Mémoire professionnel, Diplôme d'enseignement pour le degré secondaire II