cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cellular objects and Shelah's singular compactness theorem
Creators: name: Beke, Tibor
name: Rosicky, Jiri
Publisher: name: arXiv
Year: 2014
Subjects: subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: The best-known version of Shelah's celebrated singular cardinal compactness theorem states that if the cardinality of an abelian group is singular, and all its subgroups of lesser cardinality are free, then the group itself is free. The proof can be adapted to cover a number of analogous situations in the setting of non-abelian groups, modules, graph colorings, set transversals etc. We give a single, structural statement of singular compactness that covers all examples in the literature that we are aware of. A case of this formulation, singular compactness for cellular structures, is of special interest; it expresses a relative notion of freeness. The proof of our functorial formulation is motivated by a paper of Hodges, based on a talk of Shelah. The cellular formulation is new, and related to recent work in abstract homotopy theory.
Heterogeneous Target Speech Separation
Creators: name: Tzinis, Efthymios
name: Wichern, Gordon
name: Subramanian, Aswin
name: Smaragdis, Paris
name: Roux, Jonathan Le
Publisher: name: arXiv
Year: 2022
Subjects: subject: Sound (cs.SD)
subject: Machine Learning (cs.LG)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We introduce a new paradigm for single-channel target source separation where the sources of interest can be distinguished using non-mutually exclusive concepts (e.g., loudness, gender, language, spatial location, etc). Our proposed heterogeneous separation framework can seamlessly leverage datasets with large distribution shifts and learn cross-domain representations under a variety of concepts used as conditioning. Our experiments show that training separation models with heterogeneous conditions facilitates the generalization to new concepts with unseen out-of-domain data while also performing substantially higher than single-domain specialist models. Notably, such training leads to more robust learning of new harder source separation discriminative concepts and can yield improvements over permutation invariant training with oracle source selection. We analyze the intrinsic behavior of source separation training with heterogeneous metadata and propose ways to alleviate emerging problems with challenging separation conditions. We release the collection of preparation recipes for all datasets used to further promote research towards this challenging task.
description: Submitted to Interspeech 2022
Non-perturbative renormalisation with interpolating momentum schemes
Creators: name: Garron, N
name: Cahill, C
name: Gorbahn, M
name: Gracey, JA
name: Rakow, PEL
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Hadronic matrix elements evaluated on the lattice can be converted to a continuum scheme such as $\MSbar$ using intermediate non-perturbative renormalisation schemes. Discretisation effects on the lattice and convergence of the continuum perturbation theory are both scheme dependent and we explore this dependence in the framework of the Rome-Southampton method for generalised kinematics. In particular, we implement several non-exceptional {\em interpolating} momentum schemes, where the momentum transfer is {\em not} restricted to the symmetric point defined in RI/SMOM. Using flavour non-singlet quark bilinears, we compute the renormalisation factors of the quark mass and wave function for $N_f=3$ flavours of dynamical quarks. We investigate the perturbative and non-perturbative scale-dependencies. Our numerical results are obtained from lattice simulations performed with Domain-Wall fermions, based on ensembles generated by RBC-UKQCD collaborations; we use two different lattice spacings $1/a \sim 1.79 $ and $2.38$ GeV. We also give the numerical values for the relevant anomalous dimensions and matching coefficients at next-to-next-to-leading order.
Thermodynamics of massless particles in curved spacetime
Creators: name: Filho, A. A. Araújo
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This work is devoted to study the behavior of massless particles within the context of curved spacetime. In essence, we investigate the consequences of the scale factor $C(η)$ of the Friedmann-Robertson-Walker metric in the Einstein-aether formalism to study photon-like particles. To do so, we consider the system within the canonical ensemble formalism in order to derive the following thermodynamic state quantities: spectral radiance, Helmholtz free energy, pressure, entropy, mean energy and the heat capacity. Moreover, the correction to the Stefan-Boltzmann law and the equation of states are also provide. Particularly, we separate our study within three distinct cases, i.e., $s=0,p=0$; $s=1,p=1$; $s=2,p=1$. In the first one, the results are derived numerically. Nevertheless, for the rest of the cases, all the calculations are accomplished analytically showing explicitly the dependence of the scale factor $C(η)$ and the Riemann zeta function $ξ(s)$. Furthermore, our analyses are accomplished in general taking into account three different regimes of temperature of the universe, i.e., the inflationary era ($T=10^{13}$ GeV), the electroweak epoch ($T=10^{3}$ GeV) and the cosmic microwave background ($T=10^{-13}$ GeV).
description: 50 pages, and 18 figures
The Shapes of Pulsar Radio Pulses in the Plane of the Sky
Creators: name: Hakobyan, H. L.
name: Beskin, V. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The sizes of pulsar radio pulses in the plane of the sky are determined. This is important not only in relation to the possibility of directly resolving the radio pulses spatially, but also for verifying and placing constraints on existing theories of the radio emission. The shape of the pulse radio image and its variation as a function of the pulse phase for the extraordinary (X) and ordinary (O) modes are determined for the simple case of a dipolar magnetic field. Images are obtained for pulsars with various angles between their magnetic and rotational axes, and also for various model parameters, such as the height of the emission, the size of the emission region as a function of the height, and the Lorentz factor of the secondary plasma. It is shown that the size of the resulting image is appreciably smaller at the center of the pulse than at its edges.
description: 13 pages, 11 Figures, will be published in Astronomy Reports
Regulación emocional, ansiedad y craving: estudio sobre el uso problemático de internet en adolescentes de la ciudad de Tijuana
Creators: name: Diaz Cabral, Stephanie
Publisher: name: Universidad Autónoma de Baja California, Tijuana.
Year: 2023
Subjects: subject: Ciencias de la Salud||Tesis y disertaciones académicas||lemb
subject: BF77 D53 2023

description: Estudios previos han encontrado una fuerte relación entre el uso problemático de Internet, la regulación emocional, ansiedad y el craving. Además, enfatizan que es necesario estudiar los criterios diagnósticos de esta problemática.
Entropy constraints on effective field theory
Creators: name: Cao, Qing-Hong
name: Ueda, Daiki
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In effective field theory, the positivity bounds of higher derivative operators are derived from analyticity, causality, and unitarity. We show that the positivity bounds on some operators of the effective field theory, e.g., dimension-eight term of a single massless scalar field, the Standard Model Effective Field Theory dimension-eight $SU(N)$ gauge bosonic operators, and higher-derivative operators in the Einstein-Maxwell theory, generated by interactions between heavy and light degrees of freedom can be derived by the non-negativity of relative entropy. For such effective field theories, we prove that the interactions increase thermodynamic entropy at a fixed charge and an extremal point of energy, which is intimately connected with the extremality relations of black holes exhibiting Weak-Gravity-Conjecture. These arguments are applicable when corrections from the interactions involving higher-derivative operators of light fields are not dominant in the effective field theories. The entropy constraint is a consequence of the Hermiticity of Hamiltonian, and any theory violating the non-negativity of entropy would not respect the second law of thermodynamics.
description: 31 pages, 2 figures; several explanations were modified, and detailed calculations and explanations were added
Variable Accretion Processes in the Young Binary-Star System UY Aur
Creators: name: Stone, Jordan M.
name: Eisner, J. A.
name: Salyk, Colette
name: Kulesa, Craig
name: McCarthy, Don
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present new K-band spectroscopy of the UY Aur binary star system. Our data are the first to show H$_{2}$ emission in the spectrum of UY Aur A and the first to spectrally resolve the Brγ line in the spectrum of UY Aur B. We see an increase in the strength of the Brγ line in UY Aur A and a decrease in Brγ and H$_{2}$ line luminosity for UY Aur B compared to previous studies. Converting Brγ line luminosity to accretion rate, we infer that the accretion rate onto UY Aur A has increased by $2 \times 10^{-9}$ M$_{\odot}$ yr$^{-1}$ per year since a rate of zero was observed in 1994. The Brγ line strength for UY Aur B has decreased by a factor of 0.54 since 1994, but the K-band flux has increased by 0.9 mags since 1998. The veiling of UY Aur B has also increased significantly. These data evince a much more luminous disk around UY Aur B. If the lower Brγ luminosity observed in the spectrum of UY Aur B indicates an intrinsically smaller accretion rate onto the star, then UY Aur A now accretes at a higher rate than UY Aur B. However, extinction at small radii or mass pile-up in the circumstellar disk could explain decreased Brγ emission around UY Aur B even when the disk luminosity implies an increased accretion rate. In addition to our scientific results for the UY Aur system, we discuss a dedicated pipeline we have developed for the reduction of echelle-mode data from the ARIES spectrograph.
Experiencias emocionales en madres migrantes en proceso de separación de hijos e hijas en Tijuana
Creators: name: Zamora Lerma, Sarai
Publisher: name: Universidad Autónoma de Baja California, Tijuana.
Year: 2023
Subjects: subject: Psicología||Tesis y disertaciones académicas||lemb
subject: BF77 Z35 2023

description: La migración es la movilidad geográfica de personas, de manera individual o grupal, que se desplazan a hábitats distintos al de su cotidianidad.
Switching of a Single Photon by Two Λ-type Three-Level Quantum Dots Embedded in Cavities Coupling to One-Dimensional Waveguide
Creators: name: Kim, Nam-Chol
name: Ko, Myong-Chol
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Switching of a single photon interacting with two Λ-type three-level quantum dots embedded in cavities coupled to one-dimensional waveguide is investigated theoretically via the real-space approach. We demonstrated that switching of a single photon can be achieved by tuning the classic driving field on or off, and by controlling the QD-cavity coupling strength, Rabi frequency and the cavity-waveguide coupling rate. The transmission properties of a single photon by such a nanosystem discussed here could find the applications in the design of next-generation quantum devices and quantum information.
description: Accepted for publication to Plasmonics (Springer)
EEG microstate analysis in Visio - Motor Imagery task in real and imagined condition
Creators: name: BANERJEE Swati
Publisher: name: Zenodo
Year: 2023

description: The objective behind deployment of a BCI system is either to accomplish certain specific biologically inspired tasks, like hand movement, object grasping or to understand the underlying physiological phenomenon behind the task. Studying the shift in the Brain activities also known as the microstates in terms of patterns emerging in the HD-EEG (High density EEG) is one way to quantify the effect]. This approach have historically employed Audio-visual stimuli. However, in some cases vision is not suitable or inadequately engaging. In those scenarios, haptic based sensory feedback adds an edge, as a part of multisensory stimulation and is expected to improve the quality of the interaction loop. Until this date, mixing haptic interaction with other modalities is not widely studied and we explore this possibility in terms of motor function based tasks in this work.
title: Gestion de classe chez les jeunes enseignants
title: des règles à la sanction, notre expérience en stage
titleType: Subtitle
Creators: name: Lenjani, Dafina
name: Tavira, Aurore
Publisher: name: Unknown
Year: 0
Subjects: subject: gestion de classes
subject: règles
subject: transgression
subject: sanction
subject: pratique réflexive
subject: identité professionnelle

description: Notre mémoire professionnel présente une réflexion sur le thème de la gestion de classe. Cette thématique préoccupe notamment les jeunes enseignants qui risquent de rencontrer des difficultés dans ce domaine. Quel enseignant n’a jamais dû faire face à une classe difficile ? Les modules suivis à la HEP ainsi que nos praticiens formateurs ont attiré notre attention sur cette problématique. Nos expériences en stage nous ont fait prendre conscience des enjeux d’une gestion de classe efficace, condition sine qua non d’un enseignement propice aux apprentissages. Pour réaliser cette recherche, il nous a semblé pertinent d’allier théorie et éléments concrets du terrain. Sur la base de lectures d’ouvrages théoriques, nous avons mis en place, dans nos classes de stage respectives, un système de règles et des activités pour travailler leur compréhension. Cette démarche consistait à poser un cadre en définissant et en expliquant les règles dans une perspective d’intégration et d’assimilation de celles-ci par les élèves. Les connaissances procédurales font souvent défaut chez les jeunes enseignants et comme les règles existent pour être transgressées, nous nous sommes intéressées à la question de la sanction afin de réagir aux comportements inadéquats. Nous avons également réfléchi à notre propre rapport à la sanction en revisitant par le récit des événements choisis de notre parcours de vie, scolaire notamment. Etant donné que cette recherche s’intéresse à notre pratique d’enseignantes, nous avons récolté des données qualitatives par l’intermédiaire de deux outils : le récit de vie et le journal de bord. Ces instruments nous ont permis de devenir davantage des praticiennes réflexives et ont participé à la construction de notre identité professionnelle. Arrivées au terme de la rédaction de notre travail, nous relevons qu’il n’y a pas de mode d’emploi préfabriqué, applicable dans toutes les situations et auquel nous pouvons nous fier les yeux fermés, mais qu’il est pertinent de mettre en perspective sa pratique et ses expériences.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
title: Voyage au coeur des manuels de lecture courante
title: "étude comparative des manuels serbes et vaudois de 1960 à 2010"
titleType: Subtitle
Creators: name: Markovic Gitaric, Danijela
name: Streit, Amélie
Publisher: name: Unknown
Year: 0
Subjects: subject: manuels scolaires
subject: lecture
subject: identité
subject: langue
subject: culture
subject: Serbie VS Vaud

description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Application of a Spectral Method to Simulate Quasi-Three-Dimensional Underwater Acoustic Fields
Creators: name: Tu, Houwang
name: Wang, Yongxian
name: Liu, Wei
name: Yang, Chunmei
name: Qin, Jixing
name: Ma, Shuqing
name: Wang, Xiaodong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The calculation of a three-dimensional underwater acoustic field has always been a key problem in computational ocean acoustics. Traditionally, this solution is usually obtained by directly solving the acoustic Helmholtz equation using a finite difference or finite element algorithm. Solving the three-dimensional Helmholtz equation directly is computationally expensive. For quasi-three-dimensional problems, the Helmholtz equation can be processed by the integral transformation approach, which can greatly reduce the computational cost. In this paper, a numerical algorithm for a quasi-three-dimensional sound field that combines an integral transformation technique, stepwise coupled modes and a spectral method is designed. The quasi-three-dimensional problem is transformed into a two-dimensional problem using an integral transformation strategy. A stepwise approximation is then used to discretize the range dependence of the two-dimensional problem; this approximation is essentially a physical discretization that further reduces the range-dependent two-dimensional problem to a one-dimensional problem. Finally, the Chebyshev--Tau spectral method is employed to accurately solve the one-dimensional problem. We provide the corresponding numerical program SPEC3D for the proposed algorithm and describe several representative numerical examples. In the numerical experiments, the consistency between SPEC3D and the analytical solution/high-precision finite difference program COACH verifies the reliability and capability of the proposed algorithm. A comparison of running times illustrates that the algorithm proposed in this paper is significantly faster than the full three-dimensional algorithm in terms of computational speed.
description: 31 pages, 22 figures. arXiv admin note: text overlap with arXiv:2112.13602
Analyse de l'activité d'une enseignante novice dans la mise en oeuvre d'une situation-problème en mathématiques:
Creators: name: Zbinden, Camille
Publisher: name: Unknown
Year: 0
Subjects: subject: situations-problèmes
subject: mathématiques
subject: enseignant novice
subject: activité de l'enseignant
subject: autoconfrontation : théorie pratique

description: L’enseignement des mathématiques a beaucoup évolué depuis une dizaine d’années. Les modèles transmissif et behavioriste ont été abandonnés et le socio-constructivisme préconisé. Pour répondre à ce choix, l’enseignement par situations-problèmes a été sélectionné. Ces dernières demandent une mise en œuvre rigoureuse qui relève presque de la perfection. Il est en effet demandé de respecter un certain nombre d’étapes obligatoires et de changer sa posture d’enseignant en devenant alors animateur à la place de transmetteur de savoir. Les élèves deviennent quant à eux acteurs de leurs apprentissages et développent de nouvelles connaissances grâce à la confrontation à l’obstacle. La formation de base à la HEP du canton de Vaud prévoit des modules préparant à l’utilisation de cet outil pédagogique. Toutefois, les pratiques enseignantes n’ayant pas encore systématiquement changé, il est souvent difficile de pouvoir s’exercer à ces situations en classe de stage. La question que je pose alors est la suivante : comment un enseignant novice met-il en place une situation-problème dans son enseignement? Celui-ci est en effet confronté à diverses problématiques propres aux jeunes enseignants, comme par exemple gérer la classe, s’insérer dans l’établissement ou encore arriver au bout du programme annuel. En plus de ces difficultés, l’enseignant novice est également sujet à beaucoup d’émotions en regard de son travail effectué, ce qui tend parfois à le déstabiliser. Alors qu’un enseignant expert ne rencontre plus ce genre de problèmes, un enseignant débutant parvient-il à mettre en place une situation-problème en respectant tous les critères de réussite annoncés durant la formation ? Par le biais d’une technique d’autoconfrontation, ce travail de recherche tente d’analyser l’activité d’une enseignante novice afin de comprendre la façon dont cette dernière s’y prend pour mettre en œuvre une situation-problème en mathématiques.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Revisiting and improving upper bounds for identifying codes
Creators: name: Foucaud, Florent
name: Lehtilä, Tuomo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C69, 05C05

description: An identifying code $C$ of a graph $G$ is a dominating set of $G$ such that any two distinct vertices of $G$ have distinct closed neighbourhoods within $C$. These codes have been widely studied for over two decades. We give an improvement over all the best known upper bounds, some of which have stood for over 20 years, for identifying codes in trees, proving the upper bound of $(n+\ell)/2$, where $n$ is the order and $\ell$ is the number of leaves (pendant vertices) of the graph. In addition to being an improvement in size, the new upper bound is also an improvement in generality, as it actually holds for bipartite graphs having no twins (pairs of vertices with the same closed or open neighbourhood) of degree 2 or greater. We also show that the bound is tight for an infinite class of graphs and that there are several structurally different families of trees attaining the bound. We then use our bound to derive a tight upper bound of $2n/3$ for twin-free bipartite graphs of order $n$, and characterize the extremal examples, as $2$-corona graphs of bipartite graphs. This is best possible, as there exist twin-free graphs, and trees with twins, that need $n-1$ vertices in any of their identifying codes. We also generalize the existing upper bound of $5n/7$ for graphs of order $n$ and girth at least 5 when there are no leaves, to the upper bound $\frac{5n+2\ell}{7}$ when leaves are allowed. This is tight for the $7$-cycle $C_7$ and for all stars.
description: 13 pages, 3 figures
Constraints on Einstein-dilaton-Gauss-Bonnet gravity from Black Hole-Neutron Star Gravitational Wave Events
Creators: name: Lyu, Zhenwei
name: Jiang, Nan
name: Yagi, Kent
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent gravitational wave observations allow us to probe gravity in the strong and dynamical field regime. In this paper, we focus on testing Einstein-dilaton Gauss-Bonnet gravity which is motivated by string theory. In particular, we use two new neutron star black hole binaries (GW200105 and GW200115). We also consider GW190814 which is consistent with both a binary black hole and a neutron star black hole binary. Adopting the leading post-Newtonian correction and carrying out a Bayesian Markov-chain Monte Carlo analyses, we derive the 90\% credible upper bound on the coupling constant of the theory as $\sqrt{α_{GB}} \lesssim 1.33\,\rm km$, whose consistency is checked with an independent Fisher analysis. This bound is stronger than the bound obtained in previous literature by combining selected binary black hole events in GWTC-1 and GWTC-2 catalogs. We also derive a combined bound of $\sqrt{α_{GB}} \lesssim 1.18\,\rm km$ by stacking GW200105, GW200115, GW190814, and selected binary black hole events. In order to check the validity of the effect of higher post-Newtonian terms, we derive corrections to the waveform phase up to second post Newtonian order by mapping results in scalar-tensor theories to Einstein-dilaton Gauss-Bonnet gravity. We find that such higher-order terms improve the bounds by $14.5\%$ for GW200105 and $6.9\%$ for GW200115 respectively.
description: 12 pages, 5 figures
ДОППЛЕРОГРАФИЧЕСКИЕ ИССЛЕДОВАНИЯ ПРИ ПЕРЕЛОМАХ ШЕЙКИ БЕДРА ПОЖИЛОГО ВОЗРАСТА.
Creators: name: Асилова, Саодат
name: Кузиев, Голиб
name: Назирова, Муяссар
name: Назаров, Ровшан
Publisher: name: Zenodo
Year: 2025

description: при помощи ультразвукового допплерографического исследования определяется состояние архитектоники сосудистого русла в данной области опорно-двигательного аппарата. Допплерографические исследования являются одним из методов в современной функциональной диагностики.   Допплерография проводились у 56 больных с переломами шейки бедра пожилого возраста для определения состояния кровотока в главных сосудах прилежавших нижней конечностях. Ультразвуковая доплерография проводилась с помощью специалиста  до операции и в послеоперационном периоде через 6 месяцев. Исследование проведено в сравнительном аспекте с данными здоровой конечности (n=25). Допплерографические исследования при переломе шейки бедра пожилого возраста    дает возможности   определить оценки изменений кровотока   тазобедренного сустава до и после лечения. Допплерографические исследования дают возможность оценить кровообращение в нижних конечностях, а также определить скорость кровотока в области головки бедра.
Prevalencia de depresión y su asociación a infección previa de covid-19 en adultos mayores: un estudio transversal en Tijuana, México
Creators: name: Equihua Félix, Blanca Ester
Publisher: name: Universidad Autónoma de Baja California, Tijuana.
Year: 2023
Subjects: subject: Ciencias de la Salud||Tesis y disertaciones académicas||lemb
subject: QH431 E68 2022

description: Objetivo: Estimar la prevalencia de depresión en los adultos mayores que son pacientes de consulta de 3 unidades de salud para población abierta del primero y segundo nivel del Instituto de Salud para el Bienestar (INSABI) en la ciudad fronteriza de Tijuana al norte de México, e identificar la asociación entre la infección previa de Covid-19 y depresión, así como los factores de riesgo más significativos asociados a depresión en la población estudiada.
Les conditions de plaisir dans l'acte alimentaire chez les élèves de deuxième primaire
Creators: name: Henry, Laure
Publisher: name: Unknown
Year: 0
Subjects: subject: alimentation
subject: conscientisation
subject: enfants
subject: plaisir
subject: psychologie
subject: séquence didactique

description: Le plaisir alimentaire est un élément faisant partie de l’axe psychologique de l’alimentation. Ce dernier thème regroupe également la physiologie et la culture. Bien que les recherches se consacrent amplement à ce sujet social d’actualité, il n’existe pas, à ce jour, de réels résultats quant à la conscientisation du plaisir alimentaire chez les enfants âgés de 7 à 8 ans. Le plaisir alimentaire semble être une des conditions agissant dans la prévention de l’apparition des troubles du comportement alimentaire, mais il s’avère que la littérature actuelle ne se penche que très peu sur cet aspect. Mon mémoire professionnel s’intéresse donc à la conscientisation des conditions de plaisir alimentaire chez des élèves de deuxième année primaire à la suite de l’animation de séquences d’enseignement. Le recueil des données est effectué par des entretiens semis dirigés qui ont eu lieu à deux reprises, lors d’un pré-test et d’un post-test. Dix élèves de deuxième année primaire, âgés de 7 à 8 ans, ont ainsi été interrogés. Bien que l’abord des conditions de plaisir alimentaire ne soit pas chose évidente pour des enfant de cet âge là, ils sont tout de même parvenus à répondre aux questions posées par l’auteur. Certaines réponses sont uniques, d’autres apparaissent à plusieurs reprises. L’ensemble des données retranscrites a été classé sous différentes catégories. Celles-ci tiennent expressément compte des réponses émises par les élèves. En effet, il apparaît clairement que certaines réponses sont identiques d’un enfant à l’autre et qu’il est possible de les classer sous le même item. Au terme de ces entretiens, il apparaît assez significativement, dans le tableau regroupant les réponses, que les séquences didactiques vécues par les élèves aient eu une influence positive quant à leur représentation des conditions du plaisir alimentaire.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
title: Le redoublement scolaire
title: représentations des étudiants en fin de formation d'enseignant préscolaire et primaire à la HEPL
titleType: Subtitle
Creators: name: Crettaz, Delphine
name: Déray, Joachim
Publisher: name: Unknown
Year: 0
Subjects: subject: redoublement
subject: représentation
subject: formation HEPL
subject: futurs enseignants
subject: échec scolaire
subject: étudiant

description: Notre mémoire se penche sur les représentations du redoublement scolaire chez les étudiants en fin de formation préscolaire et primaire à la HEPL. Notre travail se compose d’une première partie exposant nos motivations quant au choix de notre sujet. Cette dernière comporte également un cadre théorique se basant principalement sur les recherches déjà effectuées sur la thématique du redoublement. Notre attention s’est particulièrement portée sur les études concernant les représentations du redoublement scolaire chez les enseignants. Enfin, cette partie a pour but de nous donner les outils nécessaires pour l’analyse de nos résultats de recherche. La deuxième partie comprend la présentation de notre étude et de nos résultats. Ces derniers ont été obtenus à l’aide d’entretiens réalisés durant la période du mois d’octobre 2011 à mars 2012 auprès de six étudiants en fin de formation. Ce travail nous a permis de mettre en avant plusieurs tendances à propos des représentations de ces étudiants concernant le redoublement. Dans un deuxième temps, nous avons pu répondre à notre question de recherche : « comment les étudiants de 3ème année HEPL perçoivent-ils l’évolution de leurs représentations du redoublement scolaire en cours de formation ? », que nous avons traité au cours de notre discussion et de notre conclusion.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Holography and the KKLT Scenario
Creators: name: Lüst, Severin
name: Vafa, Cumrun
name: Wiesner, Max
name: Xu, Kai
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The KKLT scenario, one of the few ideas to realize dS vacua in string theory, consists of two steps: the first involves the construction of a supersymmetric AdS vacuum with a small negative cosmological constant, and the second involves breaking supersymmetry and uplifting the energy to achieve dS. In this paper we use conventional holography to argue why it is not possible to complete the first step. We obtain this by putting a bound on the central charge of the dual theory which involves branes wrapping special Lagrangian cycles in CY 4-folds. We find that $l_{\rm AdS}^2 \lesssim χ(CY_4)$. Since $l_{\rm species}^2\gtrsim χ(CY_4)$ this leads to $l_{\rm AdS}/l_{\rm species}\lesssim 1$ leading at best to a highly curved AdS which is beyond the validity of the EFT.
description: 30 pages, 1 figure; v2: minor clarifications, references added, published version
Linear syzygies, flag complexes, and regularity
Creators: name: Constantinescu, Alexandru
name: Kahle, Thomas
name: Varbaro, Matteo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13F55, 13D02, 20F55

description: We show that for every positive integer R there exist monomial ideals generated in degree two, with linear syzygies, and regularity of the quotient equal to R. Such examples can not be found among Gorenstein ideals since the regularity of their quotients is at most four. We also show that for most monomial ideals generated in degree two and with linear syzygies the regularity grows at most doubly logarithmically in the number of variables.
Calidad de la dieta y conducta alimentaria en niños de 3 a 8 años con y sin trastorno del espectro autista, en la Ciudad de Tijuana, Baja California, México
Creators: name: Cobián Wheeler, Iovanna Paloma
Publisher: name: Universidad Autónoma de Baja California, Tijuana.
Year: 2023
Subjects: subject: Ciencias de la Salud||Tesis y disertaciones académicas||lemb
subject: RA784 C62 2022

description: El sueño cumple una función biológica vital, se ha propuesto que la presencia de trastornos relacionados con el sueño, como el Síndrome de Comedor Nocturno (SCN), están asociados al incremento de peso, probablemente a través de la desregulación de hormonas como ghrelina y cortisol.
LINA -- A social augmented reality game around mental health, supporting real-world connection and sense of belonging for early adolescents
Creators: name: Mittmann, Gloria
name: Barnard, Adam
name: Krammer, Ina
name: Martins, Diogo
name: Dias, João
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: J4

description: Early adolescence is a time of major social change; a strong sense of belonging and peer connectedness is an essential protective factor in mental health during that period. In this paper we introduce LINA, an augmented reality (AR) smartphone-based serious game played in school by an entire class (age 10+) together with their teacher, which aims to facilitate and improve peer interaction, sense of belonging and class climate, while creating a safe space to reflect on mental health and external stressors related to family circumstance. LINA was developed through an interdisciplinary collaboration involving a playwright, software developers, psychologists, and artists, via an iterative co-development process with young people. A prototype has been evaluated quantitatively for usability and qualitatively for efficacy in a study with 91 early adolescents (agemean=11.41). Results from the Game User Experience Satisfaction Scale (GUESS-18) and data from qualitative focus groups showed high acceptability and preliminary efficacy of the game. Using AR, a shared immersive narrative and collaborative gameplay in a shared physical space offers an opportunity to harness adolescent affinity for digital technology towards improving real-world social connection and sense of belonging.
description: 21 pages, 10 figures, 2 tables
Stable and unstable flow regimes for active fluids in the periodic setting
Creators: name: Bui, Christiane
name: Gesse, Christian
name: Saal, Jürgen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Depending on the involved physiobiological parameters, stable or unstable behavior in active fluids is observed. In this paper a rigorous analytical justification of (in-)stability within the corresponding regimes is given. In particular, occuring instability for the manifold of ordered polar states caused by self-propulsion is proved. This represents the prerequisite for active turbulence patterns as observed in a number of applications. The approach is carried out in the periodic setting and is based on the generalized principle of linearized (in)-stability related to normally stable and normally hyperbolic equilibria.
title: Questionner et faire reformuler les élèves pour vérifier leur compréhension
title: mise en oeuvre d'un dispositif
titleType: Subtitle
Creators: name: Bromm, Cécile
Publisher: name: Unknown
Year: 0
Subjects: subject: compréhension
subject: enseignement réciproque
subject: reformulation
subject: concepts
subject: questionnement
subject: temps

description: Mon projet de recherche tente de comprendre comment la reformulation permet de vérifier et d’améliorer la compréhension des élèves. C’est un sujet qui m’intéresse tout particulièrement, car il nous touche tous et est présent dans la vie de tous les jours, à l’école, au travail, en famille, dans les loisirs et aussi tout ce qui est en lien avec les rapports humains. Dans notre formation à la HEP de Lausanne, nous avons souvent abordé les notions de difficultés de compréhension créées, soit par une formulation incomplète de l’enseignant, par des préconceptions erronées ou soit par une fausse interprétation des données. Ce travail se base essentiellement sur la compréhension de l’élève par rapport à un concept donné, en l’occurrence, le temps. D’après moi, si l’élève a la possibilité de reformuler, cela devrait permettre à l’enseignant de vérifier ce qu’il a compris. A travers ma de recherche, j’ai essayé de répondre à la question suivante : « La demande de reformulation permet-elle à l’enseignant d’avoir des données fiables pour vérifier la compréhension d’un élève ? » Afin de trouver des réponses à ma question, j’ai observé les interactions qui se passaient au sein d’un groupe de trois élèves en difficulté en leur posant des questions qui les incitaient à reformuler. J’ai procédé à des enregistrements pour me permettre d’analyser leur type de réponse et vérifier ainsi leur compréhension. Les résultats de ma recherche me permettent de confirmer que la demande de reformulation permet de vérifier la compréhension. Cependant, il est nécessaire de travailler la reformulation avec les élèves et de travailler le concept du temps sur une plus longue durée. Le temps est un concept complexe, surtout pour des élèves de cycle initial.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
title: Redoublement
title: étude sur les reprsentations de sept enseignants du CYP2, ainsi que sur les mesures d'aide ou de soutien mises en place en classe pour des élèves redoublants
titleType: Subtitle
Creators: name: Richard, Elodie
name: Rogner, Stéphanie
Publisher: name: Unknown
Year: 0
Subjects: subject: Redoublement
subject: enseignants
subject: représentations
subject: aides
subject: élèves redoublants
subject: CYP2

description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Bare-Bones de Sitter
Creators: name: Bena, Iosif
name: Dudas, Emilian
name: Graña, Mariana
name: Monaco, Gabriele Lo
name: Toulikas, Dimitrios
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the supersymmetry-breaking three-form fluxes generated by the addition of anti-D3 branes at the tip of a Klebanov-Strassler throat. These fluxes give rise to nontrivial terms in the superpotential when the throat is embedded in a flux compactification. We describe these terms both from a ten-dimensional and from a four-dimensional perspective and show that, upon including Kähler-moduli stabilization, the resulting potential admits de Sitter minima. Our proposed de Sitter construction does not require additional supersymmetry-breaking (0,3) fluxes, and hence is more minimalist than the KKLT proposal.
description: 4 pages, 2 figures
The Nuclear Structure and Associated Electron Capture Rates on Odd-Z Nucleus $^{51}$V in Stellar Matter
Creators: name: Rahman, Muneeb-Ur
name: Nabi, Jameel-Un
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Gamow-Teller strength distribution function, B(GT), for the odd Z parent $^{51}$V, $N-Z$ =5, up to 30 MeV of excitation energy in the daughter $^{51}$Ti is calculated in the domain of proton-neutron Quasiparticle Random Phase Approximation (pn-QRPA) theory. The pn-QRPA results are compared against other theoretical calculations, (n, p) and high resolution (d, $^{2}$He) reaction experiments. For the case of (d, $^{2}$He) reaction the calibration was performed for $0\leq E_{j} \leq 5.0$ MeV, where the authors stressed that within this excitation energy range the $ΔL = 0$ transition strength can be extracted with high accuracy for $^{51}$V. Within this energy range the current pn-QRPA total B(GT) strength 0.75 is in good agreement with the (d, $^{2}$He) experiment's total strength of 0.9 $\pm$ 0.1. The pn-QRPA calculated Gamow-Teller centroid at 4.20 MeV in daughter $^{51}$Ti is also in good agreement with high resolution (d, $^{2}$He) experiment which placed the Gamow-Teller centroid at 4.1 $\pm$ 0.4 MeV in daughter $^{51}$Ti. The low energy detailed Gamow-Teller structure and Gamow-Teller centroid play a sumptuous role in associated weak decay rates and consequently affect the stellar dynamics. The stellar weak rates are sensitive to the location and structure of these low-lying states in daughter $^{51}$Ti. The calculated electron capture rates on $^{51}$V in stellar matter are also in good agreement with the large scale shell model rates.
description: 13 pages, 4 figures and 1 table. arXiv admin note: text overlap with arXiv:1203.4669
title: L'inclusion des enfants aux besoins particuliers
title: représentations de futurs enseignants
titleType: Subtitle
Creators: name: Castro, Marisa
Publisher: name: Unknown
Year: 0
Subjects: subject: Inclusion
subject: Intégration
subject: Besoins particuliers
subject: Etudiants
subject: Formation
subject: Représentations

description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Demonstration of non-Abelian frame charge flow in photonic crystals
Creators: name: Wang, Dongyang
name: Zhang, Z. Q.
name: Chan, C. T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In PT symmetric systems, the notion of non-Abelian frame charges enables multiband topological characterization of the degeneracy nodes through examining the eigenvector frame rotations. Interestingly, some features of these frame charges can be viewed as an analogue of electric charges confined in conducting wires, only that they flow in momentum space along nodal lines. However, these frame charges are not integers, and non-Abelian signatures emerge when braiding between adjacent band nodal lines occurs, which flips the direction of the flow. In photonic systems, we discover that the photonic Γ point serves as the source or sink of such frame charge flow due to a hidden braiding induced by the often-ignored electrostatic mode at zero-frequency. We use biaxial photonic crystals as examples and show how complex nodal line configurations can be explained as the topological consequences of the frame charge flow from the Γ point to the Brillouin zone boundaries. We further designed and fabricated meta-crystals to experimentally observe these line nodes as manifestation of the non-Abelian frame charge flow.
Opinions d'enseignants vaudois sur l'évaluation de la qualité de l'enseignement
Creators: name: Fritz, Manon
name: Villet, Maxime
Publisher: name: Unknown
Year: 0
Subjects: subject: Evaluation
subject: Qualité
subject: Régulation
subject: Efficacité
subject: Enseignement
subject: Lois scolaires

description: L’évaluation du travail des enseignants est un sujet d’actualité qui touche la société vaudoise. En effet, les votations de septembre 2011 et l’acceptation de la nouvelle loi LEO (loi sur l’enseignement obligatoire) inscrivent plusieurs modalités d’évaluation du corps enseignant. Il a paru intéressant de questionner des enseignants généralistes primaires sur leur vision des enjeux et des fonctions d’une évaluation de leur travail. En effet, la plupart des enseignants en activité ont vécu l’inspectorat et semblent réfractaires voire méfiants, face à des démarches d’évaluation. En conséquence, ils ont mis en place d’autres systèmes d’évaluation propre à chaque individu ou groupe d’individus comme la collaboration entre enseignants, l’écriture d’un journal de bord, la pratique réflexive ou encore la formation continue. Nous nous sommes basés sur des textes légaux pour présenter la situation dans le canton. Ensuite, nous avons étoffé notre travail par des ouvrages d’auteurs différents, d’années différentes et de pensées divergentes traitant des composantes, de la qualité de l’enseignement, de l’évaluation de l’enseignement et de l’efficacité de l’évaluation de l’enseignement. D’autres chercheurs, comme le grec Kassotakis, se sont intéressés à l’évaluation de l’enseignement dans le secteur secondaire. Il en était ressorti que l’absence de l’évaluation du travail des enseignants montre un dysfonctionnement du système éducatif. La récolte des données s’est basée sur des entretiens semi-dirigés durant lesquels les enseignants ont répondu à plusieurs questions du chercheur. Nous avons analysé les résultats en regard des concepts développés. Notre recherche tend à faire réfléchir chaque praticien sur le but d’une évaluation de son travail et des effets que cette démarche pourrait provoquer dans son efficacité professionnelle. Les enseignants se rendent-ils compte des enjeux et des fonctions de l’évaluation de leur enseignement ? Sont-ils favorables à une telle démarche ? Définissent-ils des critères de qualité ?
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Signatures of classical bifurcations in the quantum scattering resonances of dissociating molecules
Creators: name: Gaspard, Pierre
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: A study is reported of the quantum scattering resonances of dissociating molecules using a semiclassical approach based on periodic-orbit theory. The dynamics takes place on a potential energy surface with an energy barrier separating two channels of dissociation. Above the barrier, the unstable symmetric-stretch periodic orbit may undergo a supercritical pitchfork bifurcation, leading to a classically chaotic regime. Signatures of the bifurcation appear in the spectrum of resonances, which have a shorter lifetime than classically expected. A method is proposed to evaluate semiclassically the energy and lifetime of the quantum resonances in this intermediate regime.
Weak Ergodicity Breaking in Non-Hermitian Many-body Systems
Creators: name: Chen, Qianqian
name: Chen, Shuai A.
name: Zhu, Zheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The recent discovery of persistent revivals in the Rydberg-atom quantum simulator has revealed a weakly ergodicity-breaking mechanism dubbed quantum many-body scars, which are a set of nonthermal states embedded in otherwise thermal spectra. Until now, such a mechanism has been mainly studied in Hermitian systems. Here, we establish the non-Hermitian quantum many-body scars and systematically characterize their nature from dynamic revivals, entanglement entropy, physical observables, and energy level statistics. Notably, we find the non-Hermitian quantum many-body scars exhibit significantly enhanced coherent revival dynamics when approaching the exceptional point. The signatures of non-Hermitian scars switch from the real-energy axis to the imaginary-energy axis after a real-to-complex spectrum transition driven by increasing non-Hermiticity, where an exceptional point and a quantum tricritical point emerge simultaneously. We further examine the stability of non-Hermitian quantum many-body scars against external fields, reveal the non-Hermitian quantum criticality and eventually set up the whole phase diagram. The possible connection to the open quantum many-body systems is also explored. Our findings offer insights for realizing long-lived coherent states in non-Hermitian many-body systems.
description: 22 pages, 6 figures