cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Pectina de cáscara de sandía :
Creators: name: Flores Peñaloza, Olivia
Publisher: name: Universidad Autónoma de Baja California, Mexicali.
Year: 2023
Subjects: subject: Sandía||Tesis y disertaciones académicas||lemb||Pectina||Tesis y disertaciones académicas||lemb
subject: SB379.W38 F56 2022

description: La pectina de la cáscara de sandía (PCS) presenta propiedades emulsificantes, sin embargo, su comportamiento en presencia de otros componentes emulsificantes no ha sido reportado, así como tampoco sus propiedades en emulsiones producidas por un método distinto al de homogenización a alta presión. En este trabajo se determinó el mecanismo de interacción de la PCS con otro emulsificante (Tween 80) en la producción de una emulsión. Asimismo, se caracterizó la pectina extraída y se evaluó su capacidad como emulsificador único. La pectina fue extraída con HCl 0.1 M, a 80°C por 60 min. El grado de esterificación (DE) y contenido de metoxilos (MeO) de la pectina se determinó con el método de titulación y el peso molecular (pM) viscosimétrico con la ecuación de Mark Houwink-Sakura. Las emulsiones O/W se prepararon con la técnica de titulación con agua empleando distintas proporciones de aceite de canola, pectina de sandía (2% p/v) y Tween 80. El tamaño de la partícula y potencial ζ fueron determinados por medio de la técnica de dispersión dinámica de la luz (DSL). La PCS tuvo un DE 70.02 ± 2.8%, MeO 11.43 ± 0.36% y pM de 30,093.41 g/mol. Las emulsiones preparadas con pectina como único emulsificante fueron inestables. En cambio, la pectina como co-emulsificante formó emulsiones moderadamente estables. Las pruebas de DSL mostraron que al aumentar la concentración de pectina, aumentó el tamaño de la micela, así como la polaridad negativa, lo cual sugiere que la pectina fue parcialmente adsorbida en la interface O/W. Se determinó que la formulación 1% (v/v) de aceite, 3% (v/v) de pectina y 9% (v/v) de Tween 80 (potencial ζ -39.3 mV y diámetro de 8.61 nm) fue la concentración que saturó la interfase O/W. Esta investigación demuestra que la PCS reduce la concentración de Tween 80 en emulsiones formadas con un método de baja energía, situación favorable para reemplazar ingredientes de origen sintético por naturales.
Diseño de sistema logístico para la recuperación de aceite vegetal residual /
Creators: name: Quintana Álvarez, Lisandra
Publisher: name: Universidad Autónoma de Baja California, Mexicali.
Year: 2023
Subjects: subject: Aceites y grasas comestibles||Tesis y disertaciones académicas||lemb||Aceites y grasas comestibles||Reciclado||Tesis y disertaciones académicas||lemb
subject: TP670 Q85 2022

description: La recuperación de aceite vegetal residual es un problema complejo por la variedad de las fuentes que lo generan. Los sistemas de recolección que existen no logran recolectar todo el aceite vegetal residual que se genera. El sistema de recolección debe resolver dos problemas: identificar la ubicación tanto de los puntos de recolección como el centro de acopio y el diseño de rutas que garanticen la optimización de los recursos. Es por ello por lo que el objetivo del presente trabajo fue desarrollar un sistema logístico para la recuperación de aceite vegetal residual mediante un sistema de información geográfica que integre las fuentes de generación en Mexicali B.C. El sistema integra todas las fuentes de generación de aceite vegetal residual clasificadas en 3 sectores: industrial, de servicios y residencial y optimiza las rutas de recolección. El problema se modeló como un VRPSPDTW y se solucionó utilizando la herramienta Network Analyst de ArcGIS. El sistema desarrollado se comparó con el sistema de recolección que opera actualmente en Mexicali. La propuesta aumenta el volumen de aceite vegetal residual recolectado en un 87%. Disminuye el consumo de combustible por ruta en un 63% y mejora la utilización de la capacidad de transportación en un 93%. También, disminuye el costo de transportación en un 73%. Se reduce en un 78% la contaminación del agua y en un 14% las emisiones de CO2e por ruta. El sistema logístico de recolección de aceite vegetal residual propuesto puede implementarse en cualquier ciudad, ya que se adapta a sus necesidades y características.
La représentation des enseignants sur l'estime de soi de leur élèves
Creators: name: Rochat, Mélissa
name: Verrey, Rosalie
Publisher: name: Unknown
Year: 0
Subjects: subject: Estime de soi
subject: valeur de soi
subject: représentation des enseignants
subject: théorie actuelle de l'estime de soi
subject: rôle de la famille
subject: rôle de l'école

description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Two-Photon Excitation Sets Limit to Entangled Photon Pair Generation from Quantum Emitters
Creators: name: Seidelmann, Tim
name: Schimpf, Christian
name: Bracht, Thomas K.
name: Cosacchi, Michael
name: Vagov, Alexei
name: Rastelli, Armando
name: Reiter, Doris E.
name: Axt, Vollrath Martin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Entangled photon pairs are key to many novel applications in quantum technologies. Semiconductor quantum dots can be used as sources of on-demand, highly entangled photons. The fidelity to a fixed maximally entangled state is limited by the excitonic fine-structure splitting. This work demonstrates that, even if this splitting is absent, the degree of entanglement cannot reach unity when the excitation pulse in a two-photon resonance scheme has a finite duration. The degradation of the entanglement has its origin in a dynamically induced splitting of the exciton states caused by the laser pulse itself. Hence, in the setting explored here, the excitation process limits the achievable concurrence for entangled photons generated in an optically excited four-level quantum emitter.
description: 7 pages, 3 figures, supplemental material
Global HTGR Survey
Creators: name: Ewing, Peter
Publisher: name: F1000 Research Limited
Year: 2023

description: These slides were prepared for a "Lightning Talk" at the Nuclear and Emerging Technologies for Space (NETS) Conference in May 2023, but I was unable to attend. The basic premise is that Nuclear Thermal Propulsion (NTP) for Space currently relies on High Temperature Gas Reactors (HTGRs), and the slides address global efforts and workforces in this area. The information has appeared in other published articles which are noted on the References Slide.

 It is easier to reach me at peter.ewing@outlook.com than at ewing1563@gmail.com. Thank You
Distribution of zeros of polynomials with positive coefficients
Creators: name: Eremenko, Alexandre
name: Bergweiler, Walter
Publisher: name: arXiv
Year: 2014
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30C15, 26C10, 31A05

description: We describe the limit zero distributions of sequences of polynomials with positive coefficients.
description: 12 pages
IUPAC WorldFAIR Chemistry: Managing Chemical Data Digitally
Creators: name: Mustafa, Fatima
name: McEwen, Leah
name: Bruno, Ian
name: Chalk, Stuart
name: Bolton, Evan
Publisher: name: Zenodo
Year: 2023
Subjects: Poster, FAIR, Cheminformatics, Chemical Data

description: WorldFAIR Chemistry poster presentation presented at the IUPAC CHAINS. The meeting took place in the Hague, the Netherlands, Aug 18-26 2023.
Intermolecular forces at ice and water interfaces: premelting, surface freezing and regelation
Creators: name: Luengo-Marquez, Juan
name: Izquierdo-Ruiz, Fernando
name: MacDowell, Luis G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Applied Physics (physics.app-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Using Lifshitz theory we assess the role of van der Waals forces at interfaces of ice and water. The results are combined with measured structural forces from computer simulations to develop a quantitative model of the surface free energy of premelting films. This input is employed within the framework of wetting theory and allows us to predict qualitatively the behavior of quasi-liquid layer thickness as a function of ambient conditions. Our results emphasizes the significance of vapor pressure. The ice vapor interface is shown to exhibit only incomplete premelting, but the situation can shift to a state of complete surface melting above water saturation. The results obtained serve also to assess the role of subsurface freezing at the water-vapor interface, and we show that intermolecular forces favor subsurface ice nucleation only in conditions of water undersaturation. We show ice regelation at ambient pressure may be explained as a process of capillary freezing, without the need to invoke the action of bulk pressure melting. Our results for van der Waals forces are exploited in order to gauge dispersion interactions in empirical point charge models of water.
description: 27 pages, 15 figures, 7 tables (including supplementary material)
Cellular automata can classify data by inducing trajectory phase coexistence
Creators: name: Whitelam, Stephen
name: Tamblyn, Isaac
Publisher: name: arXiv
Year: 2022
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We show that cellular automata can classify data by inducing a form of dynamical phase coexistence. We use Monte Carlo methods to search for general two-dimensional deterministic automata that classify images on the basis of activity, the number of state changes that occur in a trajectory initiated from the image. When the number of timesteps of the automaton is a trainable parameter, the search scheme identifies automata that generate a population of dynamical trajectories displaying high or low activity, depending on initial conditions. Automata of this nature behave as nonlinear activation functions with an output that is effectively binary, resembling an emergent version of a spiking neuron.
Neural Architecture Search using Property Guided Synthesis
Creators: name: Jin, Charles
name: Phothilimthana, Phitchaya Mangpo
name: Roy, Sudip
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: In the past few years, neural architecture search (NAS) has become an increasingly important tool within the deep learning community. Despite the many recent successes of NAS, however, most existing approaches operate within highly structured design spaces, and hence explore only a small fraction of the full search space of neural architectures while also requiring significant manual effort from domain experts. In this work, we develop techniques that enable efficient NAS in a significantly larger design space. To accomplish this, we propose to perform NAS in an abstract search space of program properties. Our key insights are as follows: (1) the abstract search space is significantly smaller than the original search space, and (2) architectures with similar program properties also have similar performance; thus, we can search more efficiently in the abstract search space. To enable this approach, we also propose a novel efficient synthesis procedure, which accepts a set of promising program properties, and returns a satisfying neural architecture. We implement our approach, $α$NAS, within an evolutionary framework, where the mutations are guided by the program properties. Starting with a ResNet-34 model, $α$NAS produces a model with slightly improved accuracy on CIFAR-10 but 96% fewer parameters. On ImageNet, $α$NAS is able to improve over Vision Transformer (30% fewer FLOPS and parameters), ResNet-50 (23% fewer FLOPS, 14% fewer parameters), and EfficientNet (7% fewer FLOPS and parameters) without any degradation in accuracy.
description: Our code is available at https://github.com/google-research/google-research/tree/master/abstract_nas
Modelado y diseño de una prótesis de cadera por medio de elemento finito /
Creators: name: Guzmán Herrera, Manuel
Publisher: name: Universidad Autónoma de Baja California, Mexicali.
Year: 2023
Subjects: subject: Articulación de la cadera||Luxación congénita||Tesis y disertaciones académicas||lemb||Artroplastia de reemplazo total de cadera||Tesis y disertaciones académicas||lemb||Prótesis de cadera||Tesis y disertaciones académicas||lemb
subject: RD772 G89 2022

description: Elegir una prótesis adecuada para restaurar la funcionalidad de la articulación de la cadera es un trabajo complejo. Las geometrías de las prótesis, los materiales y el tipo de da ́ no en la cadera son factores críticos para evitar posibles problemas (aflojamiento aséptico, fractura y desgaste natural). Comparar los implantes disponibles para ́ seleccionar la mejor opción no es sencillo debido a las diversas cargas y condiciones de contorno utilizadas en ́ las pruebas, lo que dificulta el proceso para comparar las ventajas y desventajas entre ellos. Este trabajo propone la evaluacion de implantes de cadera utilizando una base estandarizada (generada a partir de una revisi ́ on de la ́ literatura y las normas ISO) para comparar las geometr ́ıas de los implantes y presentar un nuevo diseño h ̃ ́ıbrido para mejorar el rendimiento utilizando las mejores cualidades de los implantes informados en la revisión de la ́ literatura. Se evaluaron dieciséis prótesis de cadera con el Método de Elemento Finito (MEF) utilizando las mis- ́ mas condiciones de contorno y carga a través de análisis multiobjetivo (tensión y deformación de von Mises). En ́ consecuencia, se obtuvo una propuesta de geometr ́ıa h ́ıbrida evaluando puntos espec ́ıficos a lo largo del implante (región medial y lateral) para definir la sección transversal (trapezoidal) y el nuevo perfil. La nueva propuesta ́ de implante h ́ıbrido presento una reducción del esfuerzo del 9.6% en comparación con el implante de referencia ́ P2-T (el implante con mejor comportamiento) en la actividad más crítica (actividad 4) utilizando una aleación de ́ titanio. También, se obtuvo una reducción de esfuerzos similar de 9.98% con las normas ASTM F2996-13 e ISO ́ 7206–4:2010(E).
Bubble dynamics in fluids with N-body simulations
Creators: name: Lewicki, Marek
name: Vaskonen, Ville
name: Veermäe, Hardi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a new approach to studies of bubble dynamics in fluids. Relying on particle-based simulations, this method is general and suitable for cases where the commonly used perfect fluid description fails. We study expanding true vacuum bubbles surrounded by free or self-interacting particles and quantify how self-interactions affect the terminal bubble wall velocity. We find that, for sufficiently strongly self-interacting fluids, local thermal equilibrium is maintained around the bubble wall and the fluid profile is similar to that obtained with the perfect fluid description.
description: 9 pages, 8 figures
The solution of the optimization problems in equipment and technology foundry
Creators: name: Demin, Dmitriy
Publisher: name: figshare
Year: 2020
Subjects: subject: 99902 Engineering Instrumentation
subject: FOS: Other engineering and technologies

description: The aim of this article is to show the possibilities of modeling the results of designing the technology of foundry molds for the subsequent optimization of design and technological solutions to improve the foundry equipment, as well as the principles of setting and solving optimization problems for choosing the design of parts of foundry equipment. The object of research is some technological solutions for the design of casting mold technology and design solutions for equipment, using the example of a centrifugal mixer for the production of molding and core sand. Examples of the implementation of real diploma projects with a demonstration of the principles of optimization of technological solutions according to the criterion of reducing metal consumption by optimizing the allowances for machining and design solutions for optimizing the parameters of the gearing in the mixer drive are considered. Methods for researching projected technological objects that are appropriate in production conditions are proposed: dimensional analysis, determination of sample distribution functions, method of Lagrange multipliers. The procedure for applying these methods to solve specific practical optimization problems is described. It is shown that the use of the proposed approaches in the preparation of research work at the master's level in the specialty "Equipment and technology of foundry", contributes to the formation of practical skills for further use in industrial production. These results can be used to form possible directions for improving the educational process for masters studying in the specialty "Equipment and technology of foundry", at the stage of diploma design. The acquisition of relevant skills by masters is practically useful for the subsequent solution of applied research problems in practical conditions after employment in metallurgical departments of industrial enterprises. The use of such skills can make it possible for an enterprise to obtain economic benefits by reducing resource costs and increasing the performance of equipment.
Caracterización del proceso de osteogénesis en superficies de Ti6A14V nanoestructurado bajo condiciones de diabetes in vitro /
Creators: name: Castillo Uribe, Sandra Leticia
Publisher: name: Universidad Autónoma de Baja California, Mexicali.
Year: 2023
Subjects: subject: Titanio||Tesis y disertaciones académicas||lemb||Aleaciones de titanio||Tesis y disertaciones académicas||lemb
subject: TA480.T54 C38 2023

description: El titanio (Ti) y sus aleaciones (Ti6Al4V) son tratamientos excepcionales para sustituir o reparar huesos y tejidos circundantes dañados. En particular, el desarrollo de superficies nanoestructuradas de Ti6Al4V se ha convertido en una estrategia prometedora para mejorar la respuesta funcional del hueso. Aunque los implantes basados en el Ti6Al4V presentan un excelente rendimiento osteoconductor en condiciones de salud, la eficacia y el éxito clínico se ven alterados negativamente en los trastornos diabéticos. Es preocupante el grado de disfuncionalidad osteoblástica que contribuye la diabetes mellitus (DM), alterando la eficiente integración hueso-implante y la subsiguiente osteointegración. En este trabajo, se evaluó las propiedades funcionales de formación de hueso de los osteoblastos conducidos por nanotubos de TiO2 (NTs) anodizados sobre Ti6Al4V bajo perjudiciales condiciones diabéticas. Los resultados mostraron que las condiciones diabéticas deprimieron la capacidad inicial de crecimiento de los osteoblastos, evidenciada por la alteración de la adhesión celular temprana y la reducción de la proliferación. Sin embargo, al cabo de tres días, las condiciones diabéticas fueron suprimidas por los NTs, aumentando la actividad de los osteoblastos. Los marcadores osteogénicos de formación ósea y la diferenciación de los osteoblastos fueron reactivados por las superficies nanoestructuradas Además, la secreción de colágeno y la mineralización de la matriz ósea fueron estimuladas y conducidas a niveles similares a los de las condiciones de control. Este estudio aporta conocimientos para la potencial aplicación de biomateriales nanoestructurados como una plataforma integral para su manejo bajo el estado metabólico perjudicial presente en las condiciones diabéticas.
Beyond hard-core bosons in transmon arrays
Creators: name: Mansikkamäki, Olli
name: Laine, Sami
name: Piltonen, Atte
name: Silveri, Matti
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Arrays of transmons have proven to be a viable medium for quantum information science and quantum simulations. Despite their widespread popularity as qubit arrays, there remains yet untapped potential beyond the two-level approximation or, equivalently, the hard-core boson model. With the higher excited levels included, coupled transmons naturally realize the attractive Bose-Hubbard model. The dynamics of the model has been difficult to study due to unfavorable scaling of the dimensionality of the Hilbert space with the system size. In this work, we present a framework for describing the effective unitary dynamics of highly-excited states of coupled transmons based on high-order degenerate perturbation theory. This allows us to describe various collective phenomena -- such as bosons stacked onto a single site behaving as a single particle, edge-localization, and effective longer-range interactions -- in a unified, compact and accurate manner. While our examples deal with one-dimensional chains of transmons for the sake of clarity, the theory can be readily applied to more general geometries.
The estimation of neutrino flux produced by $\mathbf{pep}$ reactions in the Sun
Creators: name: Irgaziev, B. F.
name: Belyaev, V. B.
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 experimental result of the solar neutrino flux at one AU produced by the $p+p+e \rightarrow d+ν_e$ reaction (\textit{pep}) was announced for the first time in 2012 by the Borexino collaboration. This neutrino flux was significantly greater than the flux predicted by Bahcall and May, who used two body approaches for calculation of this reaction. We have used the three-body model for the proton-proton-electron system in the continuous spectrum of energy to determine the rate of the \textit{pep} reaction and have estimated the neutrino flux. Our result of the neutrino flux is 25-40\% more than the Bachall \textit{et al.} value and depends on the shape of nucleon-nucleon ($NN$) potential. Moreover, the calculated flux lies within the confidence interval of the experimental data in the case of pure attractive potentials as well as potential having repulsion at small distances between nucleons.
description: 12 pages, 2 figures and 1 table
Les perceptions des règles et des sanctions en milieu scolaire par les élèves au CYP2
Creators: name: Sagan, Yves-Laurent
Publisher: name: Unknown
Year: 0
Subjects: subject: règles de vie scolaires
subject: cadre scolaire
subject: sanctions éducatives
subject: vision éducationnelle
subject: entretiens individuels
subject: CYP 2

description: Dans un premier temps, ce mémoire propose une approche historique des sanctions dans le cadre scolaire. Dans cette partie théorique, documentée par des apports écrits de pédagogues et de sociologues, nous nous intéresserons à la forme de ces sanctions, mais aussi dans une moindre mesure, à la vision éducationnelle de l’institution au fil du temps. Ce retour historique permettra de tisser des liens avec le paradigme qui régit les règles de vie scolaires actuelles ainsi que les sanctions éducatives qui en découlent. Dans la seconde partie de ce travail, nous aborderons une phase de recherche sur le terrain. Des élèves de CYP2 ont été interrogés, grâce à des entretiens individuels, sur leur perception du quotidien scolaire. Comment appréhendent-ils les règles à respecter qui régissent une grande partie de leurs journées ? Quelle utilité voient-ils dans ce qu’on leur demande d’accomplir ? Autant de questions qui seront traitées dans ce travail qui se veut avant tout une proposition de réflexion sur nos pratiques d’enseignement et de gestion de classe.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
title: L'accueil
title: perdre du temps pour en gagner ?
titleType: Subtitle
Creators: name: Binotto, Alicia
Publisher: name: Unknown
Year: 0
Subjects: subject: accueil
subject: relation pédagogique
subject: valeurs
subject: apprentissage
subject: compétences sociales

description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Excess criticality mitigation for pebble bed reactor fuels by pebble displacement and replacement
Creators: name: Wing, Jonathan
name: G. Ivan Maldonado
name: Petersen, Gordon M.
name: Joseph, Robert A
Publisher: name: F1000 Research Limited
Year: 2023

description: Pebble bed reactor fuel has both high enrichment and low fuel density. Previous research by the authors has determined the peak possible keff by examining the effect of water infiltration of all possible densities in a variety of container sizes. The previous research has found that for larger containers, the established sub-critical limit of 0.95 if exceeded. These current research has examined two possible criticality mitigation methods. The examined container is the largest of the previously examined ones, the MPC-37. The first method involves adding 9 hollow stainless steel rods that span the length of the container into the model. 1 in the middle, and 8 at the midpoints between the center cylinder and the wall of the container. By displacing fuel pebbles in the most active regions of neutron multiplication, keff is most effectively reduced. In the second method, dummy pebbles comprised of stainless steel or boron carbide replace at random fuel pebbles in the container with various replacement fractions.

 The stainless steel displacement rods cut the value of peak keff from roughly 1.33 to 0.94, a difference of ~40,000 pcm at the cost of ~15% of the container's capacity. Dummy pebbles are roughly twice as effective, cutting keff down a similar amount with only a 7% replacement required for the stainless steel pebbles, and 3% replacement required for the boron carbide pebbles.
Ytterbium-driven strong enhancement of electron-phonon coupling in graphene
Creators: name: Hwang, Choongyu
name: Kim, Duck Young
name: Siegel, D. A.
name: Chan, Kevin T.
name: Noffsinger, J.
name: Fedorov, A. V.
name: Cohen, Marvin L.
name: Johansson, Börje
name: Neaton, J. B.
name: Lanzara, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present high-resolution angle-resolved photoemission spectroscopy study in conjunction with first principles calculations to investigate how the interaction of electrons with phonons in graphene is modified by the presence of Yb. We find that the transferred charges from Yb to the graphene layer hybridize with the graphene $π$ bands, leading to a strong enhancement of the electron-phonon interaction. Specifically, the electron-phonon coupling constant is increased by as much as a factor of 10 upon the introduction of Yb with respect to as grown graphene ($\leq$0.05). The observed coupling constant constitutes the highest value ever measured for graphene and suggests that the hybridization between graphene and the adatoms might be a critical parameter in realizing superconducting graphene.
description: 7 pages and 6 figures
La logique en mathématiques au CYP2 (5e HarmoS)
Creators: name: Liaudet, Florent
name: Martin Penalosa, Virginia
Publisher: name: Unknown
Year: 0
Subjects: subject: mathématiques
subject: logique
subject: déduction
subject: hypothèse
subject: démarche
subject: efficacité

description: Ce mémoire professionnel s’inscrit dans le domaine des mathématiques. Nous avons décidé de nous intéresser à la logique et à l’influence que celle-ci peut avoir sur la capacité des élèves à construire un raisonnement logique lorsqu’elle est travaillée de façon régulière. Nous avons donc posé la question de recherche suivante : « Dans quelle mesure le travail régulier de la logique mathématique influence-t- elle le raisonnement logique des élèves ? ». Nous avons émis l’hypothèse que le travail régulier de la logique permettrait aux élèves de mieux construire leur raisonnement logique, le développer et le perfectionner. Ainsi, nous aimerions prouver que l’entraînement régulier de cet aspect des mathématiques a des conséquences positives sur le travail des élèves. Pour confirmer ou infirmer notre hypothèse, nous avons effectué notre recherche dans deux classes de CYP2, l’une étant la classe test et l’autre étant la classe témoin. Nous avons prodigué un enseignement régulier de la logique à la première classe pendant six semaines à raison de deux activités logiques par semaine. La nature de ces activités varie (problèmes, suites logiques, jeux,...) ainsi que les modes de travail (seuls, par deux, par groupes). La deuxième classe, quant à elle, a été libre de toute intervention de notre part de ce côté-là. Nous avons également effectué quelques recherches et lectures sur la logique afin de préciser ce qu’est la logique, ainsi que la place qu’elle prend dans le domaine des mathématiques. Nous avons aussi tenu à souligner la façon dont elle est traitée dans les plans d’études vaudois et romand et dans les moyens d’enseignement actuellement utilisés dans les classes de CYP2. Nous vous invitons à prendre connaissance de quelques aspects de la logique dans ces quelques pages et à découvrir les résultats que nous avons obtenus.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
A Generalist Agent
Creators: name: Reed, Scott
name: Zolna, Konrad
name: Parisotto, Emilio
name: Colmenarejo, Sergio Gomez
name: Novikov, Alexander
name: Barth-Maron, Gabriel
name: Gimenez, Mai
name: Sulsky, Yury
name: Kay, Jackie
name: Springenberg, Jost Tobias
name: Eccles, Tom
name: Bruce, Jake
name: Razavi, Ali
name: Edwards, Ashley
name: Heess, Nicolas
name: Chen, Yutian
name: Hadsell, Raia
name: Vinyals, Oriol
name: Bordbar, Mahyar
name: de Freitas, Nando
Publisher: name: arXiv
Year: 2022
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Inspired by progress in large-scale language modeling, we apply a similar approach towards building a single generalist agent beyond the realm of text outputs. The agent, which we refer to as Gato, works as a multi-modal, multi-task, multi-embodiment generalist policy. The same network with the same weights can play Atari, caption images, chat, stack blocks with a real robot arm and much more, deciding based on its context whether to output text, joint torques, button presses, or other tokens. In this report we describe the model and the data, and document the current capabilities of Gato.
description: Published at TMLR, 42 pages
Efficient Knowledge Compilation Beyond Weighted Model Counting
Creators: name: Kiesel, Rafael
name: Totis, Pietro
name: Kimmig, Angelika
Publisher: name: arXiv
Year: 2022
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Quantitative extensions of logic programming often require the solution of so called second level inference tasks, i.e., problems that involve a third operation, such as maximization or normalization, on top of addition and multiplication, and thus go beyond the well-known weighted or algebraic model counting setting of probabilistic logic programming under the distribution semantics. We introduce Second Level Algebraic Model Counting (2AMC) as a generic framework for these kinds of problems. As 2AMC is to (algebraic) model counting what forall-exists-SAT is to propositional satisfiability, it is notoriously hard to solve. First level techniques based on Knowledge Compilation (KC) have been adapted for specific 2AMC instances by imposing variable order constraints on the resulting circuit. However, those constraints can severely increase the circuit size and thus decrease the efficiency of such approaches. We show that we can exploit the logical structure of a 2AMC problem to omit parts of these constraints, thus limiting the negative effect. Furthermore, we introduce and implement a strategy to generate a sufficient set of constraints statically, with a priori guarantees for the performance of KC. Our empirical evaluation on several benchmarks and tasks confirms that our theoretical results can translate into more efficient solving in practice. Under consideration for acceptance in TPLP.
description: Paper presented at the 38th International Conference on Logic Programming (ICLP 2022), 16 pages
Observing GW190521-like binary black holes and their environment with LISA
Creators: name: Sberna, Laura
name: Babak, Stanislav
name: Marsat, Sylvain
name: Caputo, Andrea
name: Cusin, Giulia
name: Toubiana, Alexandre
name: Barausse, Enrico
name: Caprini, Chiara
name: Canton, Tito Dal
name: Sesana, Alberto
name: Tamanini, Nicola
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: Binaries of relatively massive black holes like GW190521 have been proposed to form in dense gas environments, such as the disks of Active Galactic Nuclei (AGNs), and they might be associated with transient electromagnetic counterparts. The interactions of this putative environment with the binary could leave a significant imprint at the low gravitational wave frequencies observable with the Laser Interferometer Space Antenna (LISA). We show that LISA will be able to detect up to ten GW190521-like black hole binaries, with sky position errors $\lesssim1$ deg$^2$. Moreover, it will measure directly various effects due to the orbital motion around the supermassive black hole at the center of the AGN, especially the Doppler modulation and the Shapiro time delay. Thanks to a careful treatment of their frequency domain signal, we were able to perform the full parameter estimation of Doppler and Shapiro-modulated binaries as seen by LISA. We find that the Doppler and Shapiro effects will allow for measuring the AGN parameters (radius and inclination of the orbit around the AGN, central black hole mass) with up to percent-level precision. Properly modeling these low-frequency environmental effects is crucial to determine the binary formation history, as well as to avoid biases in the reconstruction of the source parameters and in tests of general relativity with gravitational waves.
description: 13+4 pages, 7+1 figures v3: corrected typo in Fig 5
Kondo interaction in FeTe and its potential role in the magnetic order
Creators: name: Kim, Younsik
name: Kim, Minsoo
name: Kim, Min-Seok
name: Cheng, Cheng-Maw
name: Choi, Joonyoung
name: Jung, Saegyeol
name: Lu, Donghui
name: Kim, Jong Hyuk
name: Cho, Soohyun
name: Song, Dongjoon
name: Oh, Dongjin
name: Yu, Li
name: Choi, Young Jai
name: Kim, Hyeong-Do
name: Han, Jung Hoon
name: Jo, Younjung
name: Seo, Jungpil
name: Huh, Soonsang
name: Kim, Changyoung
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Finding d-electron heavy fermion (HF) states has been an important topic as the diversity in d-electron materials can lead to many exotic Kondo effect-related phenomena or new states of matter such as correlation-driven topological Kondo insulator or cooperation between long-range magnetism and Kondo lattice behavior. Yet, obtaining direct spectroscopic evidence for a d-electron HF system has been elusive to date. Here, we report the observation of Kondo lattice behavior in an antiferromagnetic metal, FeTe, via angle-resolved photoemission spectroscopy (ARPES) and transport properties measurements. The Kondo lattice behavior is represented by the emergence of a sharp quasiparticle at low temperatures. The transport property measurements confirm the low-temperature Fermi liquid behavior and reveal successive coherent-incoherent crossover upon increasing temperature. We interpret the Kondo lattice behavior as a result of hybridization between localized Fe 3dxy and itinerant Te 5pz orbitals. Our interpretation is further evidenced by Fano-type tunneling spectra which accompany a hybridization gap. Our observations strongly suggest unusual cooperation between Kondo lattice behavior and long-range magnetic order.
description: 17 pages, 6 figures
Free-energy density functional for Strauss's model of transitive networks
Creators: name: Escribano, Diego
name: Cuesta, José A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Ensemble models of graphs are one of the most important theoretical tools to study complex networks. Among them, exponential random graphs (ERGs) have proven to be very useful in the analysis of social networks. In this paper we develop a technique, borrowed from the statistical mechanics of lattice gases, to solve Strauss's model of transitive networks. This model was introduced long ago as an ERG ensemble for networks with high clustering and exhibits a first-order phase transition above a critical value of the triangle interaction parameter, where two different kinds of networks with different densities of links (or, alternatively, different clustering) coexist. Compared to previous mean-field approaches, our method describes accurately even small networks and can be extended beyond Strauss's classical model -- e.g. to networks with different types of nodes. This allows us to tackle, for instance, models with node homophily. We provide results for the latter and show that they accurately reproduce the outcome of Monte Carlo simulations.
description: 13 pages, 9 figures, uses RevTeX 4.2
Evaluación del proceso de angiogénesis in vitro en nanoestructuras de óxido de Titanio TiO2 en endotelio aislado de arterias de pacientes con aterosclerosis /
Creators: name: García López Portillo, Martha Teresa
Publisher: name: Universidad Autónoma de Baja California, Mexicali.
Year: 2023
Subjects: subject: Titanio||Tesis y disertaciones académicas||lemb||Aleaciones de titanio||lemb
subject: TA480.T54 G37 2023

description: La aterosclerosis (AS) afecta la función del endotelio. Por lo tanto, es necesario estudiar células endoteliales (CE) procedentes de pacientes con AS en superficies nanoestructuradas. Los macrófagos presentan fenotipos proinflamatorio (M1) y antiinflamatorio (M2), la predominancia de uno de ellos puede promover el rechazo o la reparación tisular de la endoprótesis vascular, respectivamente. El método de esterilización del biomaterial puede promover alguno de éstos fenotipos.
Young-Carla - A prequel to “a step-by-step guide to nuclear innovation policy.”
Creators: name: Allen, Todd
name: Verma, Aditi
name: Sola Talabi
Publisher: name: F1000 Research Limited
Year: 2023

description: In 2016, Erin Burns and Todd Allen introduced Carla, a fictitious graduate nuclear engineer with
 an idea for a new type of nuclear energy technology, and explained how well-crafted policies
 could improve government partnerships to assist Carla in taking her idea to commercial
 demonstration. Six years later, how far have we come in establishing an environment that would
 create and support a young innovator like Carla? Do we have a set of operating principles that
 drives innovation and deployment of new ideas, or that supports the emergence and
 professional advancement of many Carlas? This document suggests ways in which we can create an environment in which more people want to be—and are able to be—like Carla?
"Quels sont les facteurs qui peuvent donner aux élèves l'envie de pratiquer un sport en dehors du cadre scolaire ?"
Creators: name: Soos, Katia
Publisher: name: Unknown
Year: 0
Subjects: subject: éducation physique
subject: motivations
subject: facteurs
subject: sport extrascolaire
subject: influences

description: Le sport est une activité physique qui apporte beaucoup aux élèves autant physiquement que mentalement. Il est recommandé de garder un certain équilibre grâce à une bonne hygiène de vie et par conséquent d’exercer une activité physique régulière. Aujourd’hui, les enfants sont sans cesse influencés ou attirés par des phénomènes nouveaux : internet, les jeux vidéos ou les séries télévisées. Ces distractions sont agréables, distrayantes et ne demandent pas beaucoup d’efforts physiques. C’est aussi la raison pour laquelle il est plus facile de s’y réfugier. Un défit important à relever serait de trouver un moyen de motiver les élèves à exercer une activité sportive. Ceci à l’aide de différents facteurs de motivation comme l’enseignant, le milieu, l’entourage (famille, ami) ou simplement à l’aide des envies personnelles de l’élève. L’enseignant a tous les outils pour motiver un élève durant son enseignement et de nombreux supports très complets. Le milieu dans lequel vit un élève peut-être organisé de façon à ce que les jeunes aient envie d’essayer de nouvelles activités, se dépenser à l’extérieur et pourquoi pas s’inscrire dans des clubs sportifs. Et enfin, la famille et les amis ont une grande influence sur un élève qui à l’âge de la préadolescence cherche à se connaître. Mais avec tous ces facteurs, met-on suffisamment de stratégies en place afin de motiver nos élèves à faire un sport ? N’est-il pas nécessaire de créer une collaboration entre les facteurs afin d’intéresser les jeunes ?
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
title: La transition au secondaire :
title: les valeurs et attitudes des enseignants du CYT par rapport à l'orientation scolaire de leurs élèves
titleType: Subtitle
Creators: name: Mertenat, Olivier
name: Paccaud, Marc
Publisher: name: Unknown
Year: 0
Subjects: subject: enseignant
subject: orientation
subject: valeurs
subject: attitude
subject: élève
subject: transition

description: La littérature démontre que le CYT est une période charnière pour les élèves. Durant cette période, les élèves sont en contact avec des pairs qui jouent un rôle dans la perception qu'ils peuvent avoir de leur avenir scolaire et professionnel. Parmi ces pairs, les enseignants y jouent un rôle important. Et ce rôle, perceptible au travers des attitudes des enseignants, est influencé par les valeurs de ces derniers. L'objectif de ce mémoire est donc de répertorier les attitudes et les valeurs que des enseignants peuvent avoir par rapport à l'orientation de leurs élèves. Le second objectif est d'en offrir au lecteur une catégorisation pertinente pour qu'il puisse y confronter les siennes.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Hyper-diffusion on multiplex networks
Creators: name: Ghorbanchian, Reza
name: Latora, Vito
name: Bianconi, Ginestra
Publisher: name: arXiv
Year: 2022
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Multiplex networks describe systems whose interactions can be of different nature, and are fundamental to understand complexity of networks beyond the framework of simple graphs. Recently it has been pointed out that restricting the attention to pairwise interactions is also a limitation, as the vast majority of complex systems include higher-order interactions that strongly affect their dynamics. Here, we propose hyper-diffusion on multiplex networks, a dynamical process in which diffusion on each single layer is coupled with the diffusion in other layers thanks to the presence of higher-order interactions occurring when there exists link overlap. We show that hyper-diffusion on a duplex network can be described by the Hyper-Laplacian in which the strength of four-body interactions among every set of four replica nodes connected by a multilink $(1,1)$ can be tuned by a parameter $δ_{11}\ge 0$. The Hyper-Laplacian reduces to the standard lower Laplacian, capturing pairwise interactions at the two layers, when $δ_{11}=0$. By combining tools of spectral graph theory, applied topology and network science we provide a general understanding of hyper-diffusion on duplex networks when $δ_{11}>0$, including theoretical bounds on the Fiedler and the largest eigenvalue of Hyper-Laplacians and the asymptotic expansion of their spectrum for $δ_{11}\ll1$ and $δ_{11}\gg1$. Although hyper-diffusion on multiplex networks does not imply a direct ``transfer of mass" among the layers (i.e. the average state of replica nodes in each layer is a conserved quantity of the dynamics), we find that the dynamics of the two layers is coupled as the relaxation to the steady state becomes synchronous when higher-order interactions are taken into account and the Fiedler eigenvalue of the Hyper-Laplacian is not localized in a single layer of the duplex network.
description: 27 pages, 5 figures, 8 appendices
Mobile fission power for extended-stay Mars missions
Creators: name: Bendoyro, Alexander
name: L. Dale Thomas
name: Cassibry, Jason
name: Emrich, William
Publisher: name: F1000 Research Limited
Year: 2023

description: Electrical power is the major constraint to interplanetary survival and exploration. Long-stay missions present the crew with ~540 days to explore the planet's surface and a human exploration team on Mars would be ~25 times more scientifically productive than a robotic rover. It is worthwhile to explore options that can enhance human exploration capability but traditional rovers must return to base to recharge, limiting their range. A rover with an on-board fission reactor does not need to return to base to recharge and it can enable humans to visit multiple sites in one mission. It was found that it is feasible to add a shield thick enough to keep the crew safe from the reactor. The required shielding thickness did not change substantially with different reactor power output levels, nor did it change with varying distances from the reactor core. It was found that the shape of the shield greatly affected its overall mass.
Chiral Ring of Strange Metals: The Multicolor Limit
Creators: name: Isachenkov, Mikhail
name: Kirsch, Ingo
name: Schomerus, Volker
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The low energy limit of a dense 2D adjoint QCD is described by a family of ${\cal N}=(2,2)$ supersymmetric coset conformal field theories. In previous work we constructed chiral primaries for a small number $N < 6$ of colors. Our aim in the present note is to determine the chiral ring in the multicolor limit where $N$ is sent to infinity. We shall find that chiral primaries are labeled by partitions and identify the ring they generate as the ring of Schur polynomials. Our findings impose strong constraints on the possible dual description through string theory in an $AdS_3$ compactification.
description: 25 pages, 4 figures
title: L'orthographe... autrement !
title: un projet d'écriture avec des adolescents
titleType: Subtitle
Creators: name: Georges, Nathalie
Publisher: name: Unknown
Year: 0
Subjects: subject: Estime de soi
subject: Activités corporelles
subject: Confiance en soi
subject: Connaissance de soi
subject: Sentiment d'appartenance
subject: Sentiment de réussite

description: Mémoire professionnel, Master of arts en enseignement spécialisé