cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Visual appearance of wireframe objects in special relativity
Creators: name: Müller, Thomas
name: Boblest, Sebastian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computational Physics (physics.comp-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The visual appearance of a moving object in special relativity can be constructed in a straightforward manner when representing the surface of the object, or at least a wire frame model of it, as a point cloud. The apparent position of each individual point is then found by intersecting its worldline with the observer's backward light cone. In this paper, we present a complete derivation of the apparent position of a point and some more complex geometric objects for general parameter settings (configurations). We implemented our results in python and asymptote and used these tools to generate scripts that create the figures in this paper. These scripts are directly applicable in an undergraduate course to special relativity and can also serve as the basis for student projects with the aim to study more complex sceneries.
description: 22 pages, 14 figures
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 ?
Elastic Spin and Orbital Angular Momenta
Creators: name: Bliokh, Konstantin Y.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Motivated by recent theoretical and experimental interest in the spin and orbital angular momenta of elastic waves, we revisit canonical wave momentum, spin, and orbital angular momentum in isotropic elastic media. We show that these quantities are described by simple universal expressions, which differ from the results of [G. J. Chaplain et al., Phys. Rev. Lett. 128, 064301 (2022)] and do not require separation of the longitudinal and transverse parts of the wavefield. For cylindrical elastic modes, the normalized z-component of the total (spin+orbital) angular momentum is quantized and equals the azimuthal quantum number of the mode, while the orbital and spin parts are not quantized due to the spin-orbit geometric-phase effects. In contrast to the claims of the above article, longitudinal, transverse, and `hybrid' contributions to the angular momenta are equally important and cannot be neglected. As another application of the general formalism, we calculate the transverse spin angular momentum of a surface Rayleigh wave.
description: 5 pages, to appear in Phys. Rev. Lett
L'inclusion scolaire des élèves à besoins éducatifs particuliers vue par les enseignants d'un établissement primaire
Creators: name: Martin, Sandra
Publisher: name: Unknown
Year: 0
Subjects: subject: inclusion scolaire
subject: intégration scolaire
subject: séparation scolaire
subject: élèves à besoins éducatifs particuliers
subject: classe hétérogène
subject: différenciation

description: L’objectif de ce travail est de découvrir les représentations que se font les enseignants au sujet de l’inclusion scolaire. Y sont-ils favorables ou non? Qu’est-ce qui permet d’y être favorable ? Que mettent-ils en place pour inclure ? Quelles sont les conditions pour une inclusion réussie ? Mon mémoire est composé de trois parties principales. La première est une présentation théorique de la thématique de l’inclusion scolaire d’élèves à besoins éducatifs particuliers. Elle permet aussi de définir les concepts de l’inclusion, de l’intégration, de la séparation, de l’exclusion, de la différenciation et de l’élève à besoins éducatifs particuliers. La deuxième concerne les résultats de ma recherche avec quelques liens théoriques. Grâce à mon questionnaire, j’ai pu sonder les représentations que se font les enseignants d’un établissement primaire à ce sujet. Il en ressort qu’ils sont plutôt favorables à l’inclusion. Cependant, ils précisent qu’il faut voir au cas par cas et ne pas le faire de façon systématique. Leurs peurs sont le manque de moyens donnés et une charge de travail supplémentaire. Et pour terminer, la dernière est une discussion des résultats trouvés et une conclusion. Ce mémoire a peu d’impact dans l’univers de la recherche. Il ne concerne qu’un établissement primaire donc peu de conclusions peuvent en être tirées. Pour approfondir ce travail, il serait intéressant d’interroger chaque acteur de ce processus d’inclusion.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Nonlinear Coupling of Electromagnetic and Spin-Electron-Acoustic Waves in Spin-polarized Degenerate Relativistic Astrophysical Plasma
Creators: name: Andreev, Pavel A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Propagation of the finite amplitude electromagnetic wave through the partially spin-polarized degenerate plasmas leads to the instability. The instability happens at the interaction of the electromagnetic wave with the small frequency longitudinal spin-electron-acoustic waves. Strongest instability happens in the high density degenerate plasmas with the Fermi momentum close to $m_{e}c$, where $m_{e}$ is the mass of electron, and $c$ is the speed of light. The increase of the increment of instability with the growth of the spin polarization of plasmas is found.
description: 9 Pages, 1 figure
Asociación entre los conocimientos y prácticas maternas de alimentación complementaria con el estado nutricional de niños de 6 a 24 meses de edad,2022:
Creators: name: Olvera Martínez, Alma Daniela
Publisher: name: Universidad Autónoma de Baja California, Tijuana.
Year: 2023
Subjects: subject: Salud||Tesis y disertaciones académicas||lemb||Nutrición||Tesis y disertaciones académicas||lemb
subject: RA784 O58 2022

description: Introducción: La desnutrición infantil se ha incrementado en las últimas décadas en todo el mundo. Las prácticas inadecuadas de alimentación son consistentes con un aumento significativo en la prevalencia de enfermedades crónicas degenerativas particularmente en edades cada vez más tempranas; en consecuencia, es crucial evaluar la asociación entre los conocimientos maternos (CM) y prácticas maternas (PM) sobre alimentación complementaria (AC) con el estado nutricional (EN) de niños de 6 a 24 meses de edad.
Global simulations of axisymmetric radiative black hole accretion disks in general relativity with a sub-grid magnetic dynamo
Creators: name: Sadowski, Aleksander
name: Narayan, Ramesh
name: Tchekhovskoy, Alexander
name: Abarca, David
name: Zhu, Yucong
name: McKinney, Jonathan C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a sub-grid model that emulates the magnetic dynamo operating in magnetized accretion disks. We have implemented this model in the general relativisic radiation magnetohydrodynamic (GRRMHD) code \koral, using results from local shearing sheet simulations of the magnetorotational instability to fix the parameters of the dynamo. With the inclusion of this dynamo, we are able to run 2D axisymmetric GRRMHD simulations of accretion disks for arbitrarily long times. The simulated disks exhibit sustained turbulence, with the poloidal and toroidal magnetic field components driven towards a state similar to that seen in 3D studies. Using this dynamo code, we present a set of long-duration global simulations of super-Eddington, optically-thick disks around non-spinning and spinning black holes. Super-Eddington disks around non-rotating black holes exhibit a surprisingly large efficiency, $η\approx0.04$, independent of the accretion rate, where we measure efficiency in terms of the total energy output, both radiation and mechanical, flowing out to infinity. Super-Eddington disks around spinning black holes are even more efficient, and appear to extract black hole rotational energy through a process similar to the Blandford-Znajek mechanism. All the simulated models are characterized by highly super-Eddington radiative fluxes collimated along the rotation axis. We also present a set of simulations that were designed to have Eddington or slightly sub-Eddington accretion rates ($\dot{M} \lesssim 2\dot M_{\rm Edd}$). None of these models reached a steady state. Instead, the disks collapsed as a result of runaway cooling, presumably because of a thermal instability.
description: 23 pages, 28 figures, submitted to MNRAS
Meta-path Analysis on Spatio-Temporal Graphs for Pedestrian Trajectory Prediction
Creators: name: Hasan, Aamir
name: Sriram, Pranav
name: Driggs-Campbell, Katherine
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Spatio-temporal graphs (ST-graphs) have been used to model time series tasks such as traffic forecasting, human motion modeling, and action recognition. The high-level structure and corresponding features from ST-graphs have led to improved performance over traditional architectures. However, current methods tend to be limited by simple features, despite the rich information provided by the full graph structure, which leads to inefficiencies and suboptimal performance in downstream tasks. We propose the use of features derived from meta-paths, walks across different types of edges, in ST-graphs to improve the performance of Structural Recurrent Neural Network. In this paper, we present the Meta-path Enhanced Structural Recurrent Neural Network (MESRNN), a generic framework that can be applied to any spatio-temporal task in a simple and scalable manner. We employ MESRNN for pedestrian trajectory prediction, utilizing these meta-path based features to capture the relationships between the trajectories of pedestrians at different points in time and space. We compare our MESRNN against state-of-the-art ST-graph methods on standard datasets to show the performance boost provided by meta-path information. The proposed model consistently outperforms the baselines in trajectory prediction over long time horizons by over 32\%, and produces more socially compliant trajectories in dense crowds. For more information please refer to the project website at https://sites.google.com/illinois.edu/mesrnn/home.
Le contact physique entre enseignants et élèves au CIN et à l'école primaire
Creators: name: Pina, Catarina
name: Buchs, Andreina
Publisher: name: Unknown
Year: 0
Subjects: subject: corps
subject: contacts physiques
subject: proxémie
subject: l’affectivité
subject: bienveillance
subject: toucher

description: Le métier de l’enseignement est un métier très divers. En effet, un enseignant n’est pas seulement didacticien ou pédagogue, mais il est également un acteur social qui a ses propres valeurs et sa propre personnalité. Comme le dit pertinemment Paquay (1994), un enseignant est un « praticien artisan », « un praticien réflexif », « une personne », « un acteur social », « un technicien » et « un maître instruit ». En effet, l’enseignant doit non seulement être créatif, patient et responsable, mais il doit également se remettre constamment en question, ainsi que son enseignement, afin de permettre aux élèves de se développer. Grâce à ce mémoire, nous pouvons constater à travers différentes situations que chaque enseignant agit à sa manière dans sa classe et avec ses élèves. Il est la plupart du temps, seul face à sa classe, alors il agit d’après ses propres représentations. Parfois, cette liberté peut être néfaste pour les élèves, car certains enseignants ont des pratiques qui peuvent être remises en question. Le thème de notre mémoire est « délicat », car il n’est pas souvent évoqué dans notre métier et dans notre formation. Il s’agit du contact physique entre enseignants et élèves à l’école. Nous nous sommes intéressées plus particulièrement à l’affectivité des élèves auprès de leur enseignants et vice et versa. Souvent les jeunes élèves sont tactiles entre eux, mais aussi avec l’enseignant. Ils caressent les cheveux de l’enseignante lorsque celle-ci tente de leur expliquer un énoncé, puis, ils glissent leur main dans celle de la maîtresse. Parfois les élèves cherchent même à donner ou recevoir des bisous. Face à cette affectivité, nous avons voulu savoir quelles étaient les limites à adopter à l’école ? Est-ce que l’enseignant peut toucher ses élèves ? Est-ce qu’il devrait plutôt éviter tout contact physique entre lui et ses élèves ? Est-ce que le contact physique peut nuire la relation pédagogique ? Par ce mémoire, nous avons tenté de répondre à ces différentes questions.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Toroidal optical transitions in hydrogen-like atoms
Creators: name: Kuprov, Ilya
name: Wilkowski, David
name: Zheludev, Nikolay
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is commonly believed that electromagnetic spectra of atoms and molecules can be fully described by interactions of electric and magnetic multipoles. However, it has recently become clear that interactions between light and matter also involve toroidal multipoles - toroidal absorption lines have been observed in electromagnetic metamaterials. Here we show that a new type of spectroscopy of the hitherto largely neglected toroidal dipolar interaction becomes feasible if, apart from the classical r{\times}r{\times}p toroidal dipole density term responsible for the toroidal transitions in metamaterials, the spin-dependent r{\times}σ term (that only occurs in relativistic quantum mechanics) is taken into account. We show that toroidal transitions are odd under parity and time-reversal symmetries; they can therefore be observed and distinguished from electric multipole and magnetic dipole transitions.
description: 9 pages, 2 figures, 1 table
20-Mode Universal Quantum Photonic Processor
Creators: name: Taballione, Caterina
name: Anguita, Malaquias Correa
name: de Goede, Michiel
name: Venderbosch, Pim
name: Kassenberg, Ben
name: Snijders, Henk
name: Kannan, Narasimhan
name: Vleeshouwers, Ward L.
name: Smith, Devin
name: Epping, Jörn P.
name: van der Meer, Reinier
name: Pinkse, Pepijn W. H.
name: Vlekkert, Hans van den
name: Renema, Jelmer J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Integrated photonics is an essential technology for optical quantum computing. Universal, phase-stable, reconfigurable multimode interferometers (quantum photonic processors) enable manipulation of photonic quantum states and are one of the main components of photonic quantum computers in various architectures. In this paper, we report the realization of the largest quantum photonic processor to date. The processor enables arbitrary unitary transformations on its 20 input modes with an amplitude fidelity of $F_{\text{Haar}} = 97.4\%$ and $F_{\text{Perm}} = 99.5\%$ for Haar-random and permutation matrices, respectively, an optical loss of 2.9 dB averaged over all modes, and high-visibility quantum interference with $V_{\text{HOM}}=98\%$. The processor is realized in $\mathrm{Si_3N_4}$ waveguides and is actively cooled by a Peltier element.
description: Added authors Narasimhan Kannan and Ward L. Vleeshouwers that were missing. Added references and further technical information. Corrected the name of the funding agency (NWO). Made changes after acceptance for publication in Quantum
BioExcel Webinar #50: Using competencies to guide training and professional development
Creators: name: Matser, Vera
name: Llinares, Marta Lloret
Publisher: name: Zenodo
Year: 2020
Subjects: Webinar

description: Life Science research has become increasingly digital and has a direct influence on our daily life in areas such as health and medical applications, drug discovery, agriculture and food industry. It is one of the largest and fastest growing communities in need of high-end computing, leading to an increasing number of life science researchers who are not computing experts but who need to use complicated computationally intensive biomolecular modelling tools. High quality training is required to enable researchers to use computational tools. A competency framework can be used to define the areas of training needs and develop a training programme based on it. A competency is an observable ability of any professional, integrating multiple components such as knowledge, skills and behaviours. BioExcel has developed a competency framework that lists the competencies for professionals in the field of computational biomolecular research. This framework also enables the definition of different profiles within its field of application, which can help people identify the abilities they need for a specific role, e.g. computational chemist, and therefore, inform their career choices and professional development. The EMBL-EBI training team is involved in a number of projects that use competencies as the basis of their training programme. To provide a central and sustainable home for the generated competency framework the team has developed the competency hub to facilitate access to competency frameworks and relevant training resources and career profiles associated with them. The BioExcel framework is one of the driving use cases for the competency hub. We will demonstrate how users can obtain information from the website to guide their professional development.
Why Constant-Composition Codes Reduce Nonlinear Interference Noise
Creators: name: Borujeny, Reza Rafie
name: Kschischang, Frank
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: A time-domain perturbation model of the nonlinear Schrodinger equation is used to study wavelength-division multiplexed communication over a single polarization. The model explains (a) why constant-composition codes offer an improvement in signal to noise ratio compared with independent and uniform selection of constellation points and (b) why similar gains are obtained using carrier recovery algorithms even without using constant-composition codes.
description: Submitted to IEEE Journal of Lightwave Technology on March 4, 2022
Suppressed epidemics in multi-relational networks
Creators: name: Xu, Elvis H. W.
name: Wang, Wei
name: Xu, C.
name: Tang, Ming
name: Do, Younghae
name: Hui, P. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: A two-state epidemic model in networks with links mimicking two kinds of relationships between connected nodes is introduced. Links of weights w1 and w0 occur with probabilities p and 1-p, respectively. The fraction of infected nodes rho(p) shows a non-monotonic behavior, with rho drops with p for small p and increases for large p. For small to moderate w1/w0 ratios, rho(p) exhibits a minimum that signifies an optimal suppression. For large w1/w0 ratios, the suppression leads to an absorbing phase consisting only of healthy nodes within a range p_L =< p =< p_R, and an active phase with mixed infected and healthy nodes for p < p_L and p>p_R. A mean field theory that ignores spatial correlation is shown to give qualitative agreement and capture all the key features. A physical picture that emphasizes the intricate interplay between infections via w0 links and within clusters formed by nodes carrying the w1 links is presented. The absorbing state at large w1/w0 ratios results when the clusters are big enough to disrupt the spread via w0 links and yet small enough to avoid an epidemic within the clusters. A theory that uses the possible local environments of a node as variables is formulated. The theory gives results in good agreement with simulation results, thereby showing the necessity of including longer spatial correlations.
description: 9 pages, 6 figures
The effect of the deforming dark matter haloes of the Milky Way and the Large Magellanic Cloud on the Orphan-Chenab stream
Creators: name: Lilleengen, Sophia
name: Petersen, Michael S.
name: Erkal, Denis
name: Peñarrubia, Jorge
name: Koposov, Sergey E.
name: Li, Ting S.
name: Cullinane, Lara R.
name: Ji, Alexander P.
name: Kuehn, Kyler
name: Lewis, Geraint F.
name: Mackey, Dougal
name: Pace, Andrew B.
name: Shipp, Nora
name: Zucker, Daniel B.
name: Bland-Hawthorn, Joss
name: Hilmi, Tariq
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: It has recently been shown that the Large Magellanic Cloud (LMC) has a substantial effect on the Milky Way's stellar halo and stellar streams. Here, we explore how deformations of the Milky Way and LMC's dark matter haloes affect stellar streams, and whether these effects are observable. In particular, we focus on the Orphan-Chenab (OC) stream which passes particularly close to the LMC, and spans a large portion of the Milky Way's halo. We represent the Milky Way--LMC system using basis function expansions that capture their evolution in an $N$-body simulation. We present the properties of this system, such as the evolution of the densities and force fields of each galaxy. The OC stream is evolved in this time-dependent, deforming potential, and we investigate the effects of the various moments of the Milky Way and the LMC. We find that the simulated OC stream is strongly influenced by the deformations of both the Milky Way and the LMC, and that this effect is much larger than current observational errors. In particular, the Milky Way dipole has the biggest impact on the stream, followed by the evolution of the LMC's monopole, and the LMC's quadrupole. Detecting these effects would confirm a key prediction of collisionless, cold dark matter, and would be a powerful test of alternative dark matter and alternative gravity models.
description: 17 pages, 10 figures. Accepted for publication in MNRAS
Síntesis, caracterización y actividad citotóxica de complejos de coordinación de cobre (II) con ligando de tipo alfa-aminoácido
Creators: name: Espiritu Bretado, Denise Arleth
Publisher: name: Universidad Autónoma de Baja California, Tijuana.
Year: 2023
Subjects: subject: Ciencia||Tesis y disertaciones académicas||lemb
subject: Q181.T4 E86 2022

description: Si bien en la actualidad hay diversos medicamentos contra el cáncer en el mercado, surge la demanda de seguir desarrollando constantemente nuevas alternativas de moléculas con propiedades antineoplásicas ante los inconvenientes, como los diversos efectos secundarios, que se van presentando durante el tratamiento.
Conscience des risques et dangers qu'ont les élèves du CYT dans leur utilisation des réseaux sociaux et des chats
Creators: name: Bornick, Caroline
name: Schwitzguébel, Laure
Publisher: name: Unknown
Year: 0
Subjects: subject: réseaux sociaux
subject: chats
subject: risques
subject: dangers
subject: internet
subject: prévention

description: Ce mémoire professionnel a pour but d’étudier la conscience des risques et dangers qu’ont les élèves du CYT lors de leur utilisation des réseaux sociaux et des chats. Pour réaliser cette étude, nous avons interrogé trois du CYT d’un établissement de la région lausannoise au moyen d’un questionnaire construit sur la base de trois aspects différents soit la représentation des risques, des dangers et finalement des réseaux sociaux et des chats. Dans la catégorie risques, les questions portaient sur ce que les élèves pouvaient imaginer comme répercussions légales, personnelles ou morales à leurs actions sur un réseau social ou un chat. Pour ce qui est des dangers, nous avons choisis de questionner les élèves sur les principaux dangers qui nous semblaient toucher le plus la population choisie. Ces derniers sont le harcèlement ou cyberbullying, le sexting et le happy slapping. Finalement, pour ce qui est des représentations des réseaux sociaux et des chats, nous nous sommes intéressées aux usages que les élèves en font, aux représentations qu’ils ont sur ces usages, à leurs connaissances sur le fonctionnement de ces nouveaux moyens de communication, à l’éducation aux médias ainsi qu’au contrôle parental. Les résultats obtenus ont montré que, d’une manière générale, les élèves du CYT semblaient avoir conscience des risques et des dangers qui les guettent lors de leur utilisation des réseaux sociaux et des chats. Ils les utilisent principalement pour garder le contact avec leurs amis ou leur famille et cet usage reste donc relativement sûr. De plus, les élèves ayant répondu au questionnaire semblent savoir à qui s’adresser en cas de problème sur un réseau social et choisissent dans ce cas une personne de référence tel que leurs parents. Par contre, une faible proportion d’élèves semble ne pas du tout être consciente des risques et dangers des réseaux sociaux et des chats. Ce faible pourcentage peut potentiellement mettre en danger les autres utilisateurs. De plus, il est possible que certains élèves ne se comportent pas de manière aussi sécurisée qu’ils le disent lorsqu’ils sont en situation réelle. Il est donc important de mettre en place des systèmes de prévention dans le cadre de l’école, non seulement de manière très ciblée et ponctuelle mais aussi au quotidien dans la manière de gérer les situations à problème qui surgissent.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
title: Stalingrad, and the Politics of Historical Memory in Russia
title: Stalingrad und die Politik des historischen Gedächtnisses in Russland
titleType: AlternativeTitle
title: Сталинград и политика исторической памяти в России
titleType: AlternativeTitle
Creators: name: Khodnev, Alexander S.
Publisher: name: A. S. Khodnev, Stalingrad, and the Politics of Historical Memory in Russia, «Public history weekly», 2, 2014, n. 31
Year: 2014

description: The past forms a significant part of the collective identity of modern Russians. The most controversial figure in twentieth-century Russian history is Joseph Stalin. The assessment of his era divides Russian society no less than the current actions of the Kremlin politicians. Their appeal to Stalin’s legacy has a pronounced ideological and propagandistic character.
description: Die Vergangenheit bildet einen wesentlichen Teil der modernen kollektiven Identität der Russen. In der Geschichte Russlands des 20. Jahrhunderts gibt es keine kontroversere Figur als Josef Stalin. Die Bewertung seiner Epoche spaltet die russische Gesellschaft nicht weniger als die heutigen Handlungen der Kreml-Politiker. Die Hinwendung zu Stalins historischem Nachlass trägt einen ausgeprägten ideologischen und propagandistischen Charakter.
description: Прошлое формирует немалую часть современной коллективной идентичности россиян. В истории России XX века нет такой же противоречивой фигуры, как Иосиф Сталин. Оценка его эпохи разделяет российское общество не меньше, чем современные действия кремлевских политиков. Обращение к наследию Сталина носит ярко выраженный идеологический и пропагандистский характер.
Evaluación plaguicida de extractos de la parte aérea de Quercus agrifolia frente y la araña roja (Tetranychus urticae) y el piojo harinoso de la vid (Planococcus ficus)
Creators: name: Peñaloza Felix, Tania Monserrat
Publisher: name: Universidad Autónoma de Baja California, Tijuana.
Year: 2023
Subjects: subject: Ciencia||Tesis y disertaciones académicas||lemb
subject: Q181.T4 P45 2022

description: Las plantas han desempeñado un papel fundamental en la vida del hombre, quien las ha utilizado para suplir necesidades básicas como alimento, medicina, vivienda y vestido, siendo transmitidos estos conocimientos a sucesivas generaciones, y se han ido perfeccionando por el rigor científico.
Minimum degree thresholds for bipartite graph tiling
Creators: name: Bush, Albert
name: Zhao, Yi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C35

description: For any bipartite graph $H$, we determine a minimum degree threshold for a balanced bipartite graph $G$ to contain a perfect $H$-tiling. We show that this threshold is best possible up to a constant depending only on $H$. Additionally, we prove a corresponding minimum degree threshold to guarantee that $G$ has an $H$-tiling missing only a constant number of vertices. Our threshold for the perfect tiling depends on either the chromatic number $χ(H)$ or the critical chromatic number $χ_{cr}(H)$ while the threshold for the almost perfect tiling only depends on $χ_{cr}(H)$. Our results answer two questions of Zhao. They can be viewed as bipartite analogs to the results of Kuhn and Osthus and of Shokoufandeh and Zhao.
Síntesis de nanopartículas para liberación de analgésicos y antimicrobianos, para aplicaciones médico - quirúrgicas
Creators: name: Peña Peña, Hatziri Itzayana
Publisher: name: Universidad Autónoma de Baja California, Tijuana.
Year: 2023
Subjects: subject: Ciencia||Tesis y disertaciones académicas||lemb
subject: Q181.T4 P45 2022

description: En la actualidad, existe un problema de salud que afecta a gran parte de la población, esto es la infección en heridas, específicamente las heridas causadas después de un procedimiento quirúrgico, estas infecciones son mejor conocidas como infecciones de sitio quirúrgico y vienen ligadas a una problemática altamente preocupante, pues para tratarlas, es necesario hacer uso de antimicrobianos, como los contenidos en suturas quirúrgicas. Sin embargo, los medicamentos utilizados actualmente, han mostrado un aumento inminente de la resistencia bacteriana, es por ello que se siguen buscando alternativas a este problema, pues, aunque no es conveniente el dejar de utilizarlos, es importante hacer un buen manejo de ellos.
Dans quelle mesure l'évaluation peut-elle être une source d'anxiété chez les élèves de 1P et 2P ?
Creators: name: Imboden, Fanny
name: Marcuard, Virginie
Publisher: name: Unknown
Year: 0
Subjects: subject: Anxiété
subject: Evaluation
subject: Test
subject: Primaire
subject: Représentations

description: Cette recherche a pour but de mesurer le degré d’anxiété des élèves du 1er cycle primaire ainsi que d’identifier les représentations que ces derniers ont de l’évaluation ; sa fonction mais aussi les conséquences que celle-ci implique. Pour ce faire, nous nous sommes basées sur des études abordant le thème de l’anxiété. Ce sujet ayant été davantage étudié par des chercheurs anglo-saxons, ce sont des revues principalement américaines que nous avons consultées. En outre, peu d’études ont été réalisées au sujet des jeunes enfants. Nous avons également fait un bref historique de l’évaluation en Suisse romande. Cette étude se base donc sur une source de l’anxiété qui est celle liée à l’école et particulièrement à l’évaluation. La littérature parle d’anxiété aux tests. Afin de réaliser cette recherche, nous avons tout d’abord fait un entretien collectif avec notre classe de stage respective dans le but de cerner les représentations des élèves au sujet de l’évaluation. Nous avions deux classes à disposition : une de 1ère année et une de 2ème année primaire (3ème et 4ème selon HARMOS). Dans un deuxième temps, nous avons passé un questionnaire que nous avons lu auprès de chaque élève de manière individuelle. Pour ce faire, nous nous sommes basées sur un test d’anxiété que nous avons traduit en français et adapté pour nos élèves. Suite à la récolte de données, nous avons analysé les résultats et cela sous divers angles. Il s’agissait en premier lieu de comparer les deux degrés dans le but de vérifier si l’anxiété évoluait avec l’âge. Nous avons ensuite distingué les résultats obtenus chez les filles de ceux relevés chez les garçons afin de voir si l’anxiété variait d’un genre à l’autre. Nous avons finalement cherché à savoir si une dimension parmi les trois (soucis, physiologie et comportement) s’exprimait davantage que les autres.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Nuclear analyses for the TC with the double layer RBSB concept
Creators: name: Serikov, Arkady
name: Yuefeng  Qiu
name: Gordeev, Sergej
Publisher: name: F1000 Research Limited
Year: 2023

description: Nuclear heating analyses have been performed with the MCNP6.2 and McDeLicious-17 codes for the Test Cell of the accelerator-based IFMIF-DONES (International Fusion Materials Irradiation Facility – Demo Oriented Neutron Source) irradiation facility.

 Heat density for the IFMIF/EVEDA beam profile with 10x5 cm2 footprint studied with D+ beam energy deposition in the Li jet at the TA d-Li footprint area. •A more focused deuteron beam with a 10x5 cm2 Li footprint caused a factor of 2 increase in heat deposition in Li (peak of 211 kW/cc vs. 110 kW/cc). Considering that the initial temperature of Li entering the target is 300 C, for a 20x5 cm2 footprint the temperature increase to 428.8 C is 128.8 C, while for 10x5 cm2 it rises up to 552.2 C by 252.2 C. That means a more concentrated beam of 10x5 cm2 resulted in a similar ratio of temperature heating up as the heat deposition, delta temperature increased due to the halved beam by the same factor of 2. Operation of two accelerators with double D+ current of 250 mA with IFMIF parameters caused double-times heating of the TC materials.

 Integral heating in the TC components: one beam IFMIF-DONES (I = 125 mA) vs. two beams IFMIF (I=250 mA). A beam profile with a 20x5 cm2 footprint has been used in both cases.
Thermostatistics of the Polymeric Ideal Gas
Creators: name: Gorji, M. A.
name: Nozari, K.
name: Vakili, B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we formulate statistical mechanics of the polymerized systems in the semiclassical regime. On the corresponding polymeric symplectic manifold, we set up a noncanonical coordinate system in which all of the polymeric effects are summarized in the density of states. Since we show that the polymeric effects only change the number of microstates of a statistical system, working in this coordinate is quite reasonable from the statistical point of view. The results show that the number of microstates decreases due to existence of an upper bound for the momentum of the test particles in the polymer framework. We obtain a corresponding canonical partition function by means of the deformed density of states. By using the partition function, we study thermodynamics of the ideal gas in the polymer framework and show that our results are in good agreement with those that arise from the full quantum consideration at high temperature, and they coincide with their usual counterpart in the limit of low temperature.
description: 10 two-column pages, 3 figures, typos corrected
Qualitative analysis for viscous cosmologies in a non linear regime of the Israel-Stewart formalism
Creators: name: Aguilar-Pérez, Gilberto
name: Avilez-López, Ana A.
name: Cruz, Miguel
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We explore the dynamical properties of a cosmological model that includes viscous effects in the dark matter sector of the fluid equations in a flat Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime. The bulk viscous effects are described by a non linear extension of the full Israel-Stewart model. We allow the interchange of energy in the dark sector by means of the interaction term, namely $Q$. We establish the dynamical system corresponding to Friedmann and fluid set of equations associated to the model and study the linear stability of its critical points. From the dynamical system, we show the appearance of a critical point characterizing a de Sitter universe within the non interacting and interacting dark sector. We focus our study to analyse the stability of this fixed point in a large region of parameter space and derive linearized solutions around it. These approximate and analytical solutions are potentially able to describe the expansion of the universe since they are close to a de Sitter stationary solution. Within this regime with $Q \neq 0$, we realize the existence of regions in the space of parameters where this critical point is stable and describes the behavior of dark energy as quintessence, cosmological constant and phantom like fluids. We perform a comparison between numerical and linearized solutions nearby the critical points within the full non linear regimes and also contrast them against $Λ$CDM model. We find that fully non linear regime is favored by observations and closer to the concordance model due to the non-zero value of the parameter $j$, which controls the non linear effects. In fact, at low redshift values, the expansion rate associated to the full non linear regime is practically indistinguishable from $Λ$CDM. The deceleration parameter obtained in this regime exhibits a transition from decelerated to accelerated cosmic expansion.
description: Improved version, 18 pages, 3 figures, references added
Design of an optimized nuclear fuel pellet
Creators: name: Contryman, Dakota
name: Dooley, Patricia
name: Hervey, Addie
name: Ivers, Robert
name: Reddish, Isabella
name: Song, Hugh
Publisher: name: F1000 Research Limited
Year: 2023

description: RPI nuclear engineering students participate in a 2-semester long senior design (capstone) project as part of the curriculum. Faculty mentors offer various projects they agree to advise on, and students select a project of interest and work in groups to achieve course milestones.

 The objective of this project was to design an optimized pressurized water reactor fuel pellet, specifically tailored to compare to Westinghouse AP-1000 reactor fuel. With the current (2023) geopolitical environment, demand for reduction of greenhouse gas emissions, and likely future competition from small modular reactors, improving the design of nuclear fuel pellets to better utilize uranium at a lower cost is imperative. Through the postulated use of diverse 3D printing modalities in the future, a wide variety of pellet designs that incorporate changes to pellet volume and enrichment is possible.

 Using MCNP 6.2, a model of the Westinghouse AP-1000 reactor fuel pin was made in order to iteratively test fuel pellet designs. The key changes investigated are: (1) addition of voids to reduce initial uranium feed in lower burnup domains; (2) change in enrichment; and (3) addition of material constituents to improve the structure and resilience of the pellet.

 The technical design analysis of an improved fuel pellet was supported by economic considerations. Savings in the pricing model are based on decreases in cost through the addition of voids or of non-fissile material to the pellet, displacing the more expensive enriched fuel. This will result in shorter operating lifetimes, but this is mitigated by void and material geometric distributions in lower burnup domains and increasing the feed enrichment (albeit increasing the feed cost). Design improvements that require less radioactive material to produce the same amount of power would be perceived as beneficial by a public already anxious about anything nuclear.
Measurement of the Higgs boson mass from the $H\rightarrow γγ$ and $H \rightarrow ZZ^{*} \rightarrow 4\ell$ channels with the ATLAS detector using 25 fb$^{-1}$ of $pp$ collision data
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: An improved measurement of the mass of the Higgs boson is derived from a combined fit to the invariant mass spectra of the decay channels $H\rightarrow γγ$ and $H \rightarrow ZZ^{*} \rightarrow 4\ell$. The analysis uses the $pp$ collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at center-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of 25 fb$^{-1}$. The measured value of the Higgs boson mass is $m_H$ = 125.36 $\pm$ 0.37 (stat) $\pm$ 0.18 (syst) GeV. This result is based on improved energy-scale calibrations for photons, electrons, and muons as well as other analysis improvements, and supersedes the previous result from ATLAS. Upper limits on the total width of the Higgs boson are derived from fits to the invariant mass spectra of the $H\rightarrow γγ$ and $H \rightarrow ZZ^{*} \rightarrow 4\ell$ decay channels.
description: 25 pages plus author list + cover pages (38 pages total), 9 figures, 5 tables, submitted to Physical Review D, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-12/
Odd-even effect in n-alkane systems: A molecular dynamics study
Creators: name: Dhiman, I.
name: Berg, Marcella C.
name: Petridis, Loukas
name: Smith, Jeremy C
name: Gautam, S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Alternation in various properties of n-alkanes (CnH2n+2) as a function of carbon content (n) is termed odd-even effect. Here, we report a comprehensive molecular dynamics simulation study on n-alkane systems carried out with n ranging between 3 (propane) and 8 (octane), examining the odd-even effect in melting point, density, intramolecular conformational ordering, translational and rotational motion. We observe an odd-even alternation in these properties, but with heptane (n = 7) exhibiting anomalous behavior for all except conformational ordering. Our simulations also show the presence of odd-even behavior in rotational and translational dynamics, below and above the melting point, respectively. The results highlight the role of both molecular shape and the variation in density and their interplay in the origins of the odd-even effect.
description: 22 pages, first 16 constituting the main, followed by 6 more of supplementary material. 5 figures and 1 Table in the main, 6 figures and 1 Table in the supplementary material
Li iontronics in single-crystalline T-Nb2O5 thin films with vertical ionic transport channels
Creators: name: Han, Hyeon
name: Jacquet, Quentin
name: Jiang, Zhen
name: Sayed, Farheen N.
name: Sharma, Arpit
name: Schankler, Aaron M.
name: Kakekhani, Arvin
name: Meyerheim, Holger L.
name: Jeon, Jae-Chun
name: Park, Jucheol
name: Nam, Sang Yeol
name: Griffith, Kent J.
name: Simonelli, Laura
name: Rappe, Andrew M.
name: Grey, Clare P.
name: Parkin, Stuart S. P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The niobium oxide polymorph T-Nb2O5 has been extensively investigated in its bulk form especially for applications in fast-charging batteries and electrochemical (pseudo)capacitors. Its crystal structure that has two-dimensional (2D) layers with very low steric hindrance allows for fast Li-ion migration. However, since its discovery in 1941, the growth of single-crystalline thin films and its electronic applications have not yet been realized, likely due to its large orthorhombic unit cell along with the existence of many polymorphs. Here we demonstrate the epitaxial growth of single-crystalline T-Nb2O5 thin films, critically with the ionic transport channels oriented perpendicular to the film's surface. These vertical 2D channels enable fast Li-ion migration which we show gives rise to a colossal insulator-metal transition where the resistivity drops by eleven orders of magnitude due to the population of the initially empty Nb 4d0 states by electrons. Moreover, we reveal multiple unexplored phase transitions with distinct crystal and electronic structures over a wide range of Li-ion concentrations by comprehensive in situ experiments and theoretical calculations, that allow for the reversible and repeatable manipulation of these phases and their distinct electronic properties. This work paves the way to the exploration of novel thin films with ionic channels and their potential applications.