cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Museums as Living Organisms. A Historical Perspective on Change and Continuity in Museum Institutions
Creators: name: Bernard, Elisa
Publisher: name: IMT Alti Studi Lucca
Year: 2023

description: This dissertation engages with a question that is underrated and underexplored in the literature on museum history: how do museums respond to and/or trigger societal, political, and cultural changes? To answer this question, the research concentrates on art and archaeological museums in Italy between National Unification and the post-war period. Indeed, the history of Italian museums and theoretical debates over how to organize museums and public education in late nineteenth/early twentieth-century Italy provide paradigmatic cases. The first chapter gives an overview of the dominant avenues of research in social, political, and cultural history and role of the museum, spotlighting key historical moments and historiographical approaches. It then applies to museum institutions the Greek philosopher Plato’s well-known observation that no living organism or no piece of knowledge stays the same throughout its lifetime since the fundamental nature of human bodies and knowledge is continuous change. We can thus ask what causes a museum to be perceived as the same museum over time and analyze the conditions under which the balance between continuity and change breaks down. Combining contextual analysis and a case study approach appeared to be the most promising strategy to address these questions. For example, an analysis of the debate over the function and mission of archaeological museums in post-Unification Italy shows that museums can serve multiple purposes. These purposes, in turn, might shape museums’ collections, visions, and display and narrative strategies. The second and third chapters present the analysis of two case studies that contextualize this idea that museums never remain the same. They also outline an analytical model drafted as part of this research according to which the study of the concrete changes museums undergo or trigger in their interaction with, and in relation to, societal, political, and cultural changes enable us to identify the active fields of force in any given situation in which museums are located and act as institutions. The case studies identified and analyzed in thisdissertation are the National Museum of Palermo and Civic Museum of Padua. The analysis proposed here classifies various stimuli for change, both exogenous and endogenous, and shows how these forces can coalesce in specific moments of a museum’s life so that, viewed aposteriori, they turn into pivotal turning points. At the same time, the research presented here also takes into account museums’behavioral complexity in responding to and triggering change while maintaining continuity.
An observation concerning boundary points of the numerical range
Creators: name: Hansmann, Marcel
Publisher: name: arXiv
Year: 2014
Subjects: subject: Spectral Theory (math.SP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: A theorem of Hübner states that non-round boundary points of the numerical range of a linear operator, i.e. points where the boundary has infinite curvature, are contained in the spectrum of the operator. In this note, answering a question of Salinas and Velasco, we will show that Hübner's result remains true under the weaker assumption that the boundary has infinite upper curvature. Our short and simple proof relies on some classical ideas of Berberian.
Stakeholder-in-the-Loop Fair Decisions: A Framework to Design Decision Support Systems in Public and Private Organizations
Creators: name: Nakao, Yuri
name: Yokota, Takuya
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Due to the opacity of machine learning technology, there is a need for explainability and fairness in the decision support systems used in public or private organizations. Although the criteria for appropriate explanations and fair decisions change depending on the values of those who are affected by the decisions, there is a lack of discussion framework to consider the appropriate outputs for each stakeholder. In this paper, we propose a discussion framework that we call "stakeholder-in-the-loop fair decisions." This is proposed to consider the requirements for appropriate explanations and fair decisions. We identified four stakeholders that need to be considered to design accountable decision support systems and discussed how to consider the appropriate outputs for each stakeholder by referring to our works. By clarifying the characteristics of specific stakeholders in each application domain and integrating the stakeholders' values into outputs that all stakeholders agree upon, decision support systems can be designed as systems that ensure accountable decision makings.
European Coffee Federation comments submitted to the public consultation on the draft update of the risk assessment of nickel in food and drinking water
Creators: name: European Coffee Federation
Publisher: name: Zenodo
Year: 2020
Subjects: subject: nickel
subject: risk assessment
subject: public consultation
subject: http://id.agrisemantics.org/gacs/C1470

description: This file was submitted by the European Coffee Federation, together with their contribution to the public consultation launched in June 2020 by the European Food Safety Authority on the draft update of the risk assessment of nickel in food and drinking water.
description: EU; PDF; biocontam@efsa.europa.eu
Variable Dual Auxeticity of the Hierarchical Mechanical Metamaterial composed of Re-entrant Structural Motifs
Creators: name: Dudek, Krzysztof K.
name: Martínez, Julio A. Iglesias
name: Kadic, Muamer
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this work, a novel hierarchical mechanical metamaterial is proposed that is composed of re-entrant truss-lattice elements. It is shown that this system can deform very differently and can exhibit a versatile extent of the auxetic behaviour depending on a small change in the thickness of its hinges. In addition, depending on which hierarchical level is deforming, the whole structure can exhibit a different type of auxetic behaviour that corresponds to a unique deformation mechanism. This results in a dual auxetic structure where the interplay between the two auxetic mechanisms determines the evolution of the system. It is also shown that depending on the specific deformation pattern, it is possible to observe a very different behaviour of the structure in terms of frequencies of waves that can be transmitted through the system. In fact, it is demonstrated that even a very small change in the parametric design of the system may result in a significantly different band gap formation that can be useful in the design of tunable vibration dampers or sensors. The possibility of controlling the extent of the auxeticity also makes the proposed metamaterial to be very appealing from the point of view of protective and biomedical devices.
description: This paper was published in the journal Physica Status Solidi B, doi: https://doi.org/10.1002/pssb.202200404
title: Problèmes mathémathiques
title: quel impact un travail autour des stratégies de résolution a-t-il sur la démarche des élèves?
titleType: Subtitle
Creators: name: Oulevey, Nathalie
Publisher: name: Unknown
Year: 0
Subjects: subject: Problème
subject: Consigne
subject: Résolution
subject: Stratégie
subject: Démarche
subject: Habillage

description: Le sujet de mon mémoire concerne la résolution de problèmes mathématiques. Il porte plus précisément sur l’inﬂuence d’un travail réalisé sur des stratégies de résolution de problème avec des élèves, dans le but d’améliorer leurs capacités de résolution. Pour un bon nombre d’élèves, la résolution de problème est loin d’être évidente. Or, la non compréhension d’un problème peut déboucher sur l’abandon de tentatives de résolution (McLeod, 1989). Je désire donc observer au travers de ce mémoire l’inﬂuence d’un travail réalisé avec les élèves sur les stratégies à adopter pour résoudre des problèmes, notamment pour constater si cela permet à ces derniers d’améliorer leurs manières de résoudre et si cela modiﬁe leurs façons d’aborder un problème. La question de recherche de mon mémoire est la suivante: Quel impact un travail sur des stratégies de résolutions de problèmes mathématiques a-t-il sur les démarches de résolution des élèves?
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
The Cost of Air Pollution Control to Cotton Ginners
Creators: name: Wilmot, Charles A.
name: Looney, Zolon M.
name: McCaskill, Oliver L.
name: Wilmot, Charles A.
name: Looney, Zolon M.
name: McCaskill, Oliver L.
Publisher: name: Unknown
Year: 1974
Subjects: subject: Crop Production/Industries
subject: Environmental Economics and Policy
subject: Production Economics
subject: Air pollution
subject: capital requirements
subject: cost estimate
subject: cotton ginning
subject: economic impact
subject: waste

description: Enforcement at all gins of the strictest air pollution controls now in effect at some gins would require an investment of over $100 million. To meet these regulations, individual ginners would have to spend from nearly $24,000 to over $53,000, depending on plant size. The annual cost to the industry would be about $28.5 million. This could increase the average cost of ginning by as much as $2.23 per bale. However, present regulations vary widely between States and even within some States. Although most compliance deadlines have passed, air pollution control boards, in view of the extreme seasonality of the ginning operation and continuing economic plight of most ginners, seem to have adopted a go-slow policy of enforcement.
“In fondo siamo quasi amici”. I servizi di sicurezza della Repubblica Popolare di Polonia nel Gemello di Józef Hen
Creators: name: Nosilia, Viviana
Publisher: name: Universita' degli Studi di Salerno
Year: 2019
Subjects: Józef Hen
The Security Service of the Polish People’s Republic
March 1968 in Poland
Intertextuality

description: The article focuses on the constructive elements which used by Józef Hen to give birth to the figure of Marek Marczewski (later Mraczewski) in the short story “The Twin”, written as a reaction to the tragical riots in Warsaw in the first months of 1968. Though often seen as a work conceived on the spur of the moment, this short story is in fact more complex than that already in the first version, published in the émigré journal Kultura in 1972 under the pseudonym Korab. A closer analysis of the relationship between the protagonist Leopold Piński and the security agent Marek Marczewski reveals intertextual references to Dostoevsky’s The Double, and Crime and Punishment, and in the edition published in 1990 also to Bolesław Prus’s The Doll.
The flat density profiles of massive, and relaxed galaxy clusters
Creators: name: Del Popolo, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In the present paper, we studied by means of the SIM introduced in Del Popolo (2009), the total and DM density profiles, and the correlations among different quantities, observed by Newman et al. (2012a,b), in seven massive and relaxed clusters, namely MS2137, A963, A383, A611, A2537, A2667, A2390. Similarly to Newman et al. (2012a,b), the total density profile, in the radius range 0.003 - 0.03$r_{200}$, has a mean total density profile in agreement with dissipationless simulations. The slope of the DM profiles of all clusters is flatter than -1. The slope, $α$, has a maximum value (including errors) of $α=-0.88$ in the case of A2390, and minimum value $α=-0.14$ for A2537. The baryonic component dominates the mass distribution at radii $< 5-10$ kpc, while the outer distribution is dark matter dominated. We found an anti-correlation among the slope $α$, the effective radius, $R_e$, and the BCG mass, and a correlation among the core radius $r_{core}$, and $R_e$. Moreover, the mass in 100 kpc (mainly dark matter) is correlated with the mass inside 5 kpc (mainly baryons). The behavior of the total mass density profile, the DM density profile, and the quoted correlations can be understood in a double phase scenario. In the first dissipative phase the proto-BCG forms, and in the second dissipationless phase, dynamical friction between baryonic clumps (collapsing to the center) and the DM halo flattens the inner slope of the density profile. In simple terms, the large scatter in the inner slope from cluster to cluster, and the anti-correlation among the slope, $α$ and $R_e$ is due to the fact that in order to have a total mass density profile which is NFW-like, clusters having more massive BCGs at their centers must contain less DM in their center. Consequently the inner profile has a flatter slope.
description: 21 pages; 5 figures; Journal of Cosmology and Astroparticle Physics (JCAP), 07(2014)019
title: De "Bravo !" à "Aide-toi de ton dictionnaire !"...
title: ... quelles régulations pour améliorer l'orthographe dans la producation écrite d'élèves de 2ème primaire ?
titleType: Subtitle
Creators: name: Bugnon, Aurélia
Publisher: name: Unknown
Year: 0

description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
A Combined Method Of Fractal And GLCM Features For MRI And CT Scan Images Classification
Creators: name: Korchiyne, Redouan
name: Farssi, Sidi Mohamed
name: Sbihi, Abderrahmane
name: Touahni, Rajaa
name: Alaoui, Mustapha Tahiri
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Fractal analysis has been shown to be useful in image processing for characterizing shape and gray-scale complexity. The fractal feature is a compact descriptor used to give a numerical measure of the degree of irregularity of the medical images. This descriptor property does not give ownership of the local image structure. In this paper, we present a combination of this parameter based on Box Counting with GLCM Features. This powerful combination has proved good results especially in classification of medical texture from MRI and CT Scan images of trabecular bone. This method has the potential to improve clinical diagnostics tests for osteoporosis pathologies.
description: 13 pages, 6 figures, Signal & Image Processing : An International Journal(SIPIJ)Vol.5, No.4, August 2014
The dust, nebular emission and dependence on QSO radio properties of the associated Mg II absorption line systems
Creators: name: Khare, Pushpa
name: Berk, Daniel Vanden
name: Rahmani, Hadi
name: York, Donald G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We studied dust reddening and [O II] emission in 1730 Mg II associated absorption systems (AAS; relative velocity with respect to QSOs, < 3000 km/s; in units of velocity of light, \b{eta}, < 0.01) with 0.4 < z_abs < 2 in the SDSS DR7, focusing on their dependence on the radio and other QSO properties. We used control samples, several with matching radio properties to show (i) AAS in radio detected (RD) QSOs cause 2.6 +/- 0.2 times higher dust extinction than those in radio undetected (RUD) ones which, in turn, cause 2.9 +/- 0.7 times the dust extinction in the intervening systems; (ii) AAS in core-dominated QSOs cause 2.0 +/- 0.1 times higher dust extinction than in lobe-dominated QSOs; (iii) occurrence of AAS is 2.1 +/- 0.2 times more likely in RD QSOs than in RUD QSOs and 1.8 +/- 0.1 time more likely in QSOs having black holes with masses larger than 1.23 x 10^{9} M_sun than in those with lower mass black holes; (iv) there is excess flux in [O II]λ3727 emission in the composite spectra of the AAS samples compared to those of the control samples, which is at the emission redshift. Presence of AAS enhances the O II emission from the AGN and/or the host galaxy. This excess is similar for both RD and RUD samples, and is 2.5 +/- 0.4 times higher in lobe-dominated compared to core-dominated samples. The excess depends on the black hole mass and Eddington ratio. All these point to the intrinsic nature of the AAS except for the systems with z_abs > z_em which could be infalling galaxies.
description: 8 pages, one figure. Accepted for publication in The Astrophysical Journal
Situations scolaires générant des émotions agréables et désagréables chez des élèves de CYP1
Creators: name: Trachsel, Virginie
Publisher: name: Unknown
Year: 0
Subjects: subject: émotions agréables
subject: émotions désagréables
subject: compétences métaémotionnelles
subject: compétences scolaires
subject: situations génératrices d’émotions
subject: place des émotions

description: Ce travail de mémoire s’intéresse aux émotions vécues par des élèves de CYP1 en contexte scolaire, ainsi qu’à la connaissance qu’ont ces élèves de leurs émotions. Nous nous penchons également sur les différences qui peuvent être constatées en fonction du genre et des compétences scolaires des élèves. Le but est de répertorier les situations génératrices d’émotions agréables ou non dans le cadre de l’école, pour pouvoir ensuite envisager des pistes d’action qui permettraient de travailler sur ces émotions. Pour cette recherche, nous avons mené des entretiens avec huit élèves de première et deuxième années. Nous leur avons demandé de nous faire part d’un moment au cours duquel ils auraient vécu une émotion agréable à l’école, puis d’un moment qui aurait provoqué en eux une émotion plutôt désagréable. Les questions posées devaient nous permettre d’obtenir les informations « quoi ? », « quand ? », « où ? » et « avec qui ? ». Une fois la situation décrite, nous demandions à l’élève de définir ce qu’il avait ressenti plus précisément, afin de voir quelle émotion il serait en mesure ou non de reconnaître et de nommer. Deux échelles permettant d’évaluer l’intensité et la fréquence de ces émotions lui étaient également présentées pour nous permettre d’avoir une idée plus précise de la place de ces émotions dans le quotidien des élèves. Les données recueillies au cours de ces entretiens sont présentées dans ce travail sous forme de tableaux et une courte analyse est proposée pour chacun d’entre eux. Nos résultats et analyses ne se basant que sur un nombre restreint de sujets, il nous paraît important de rappeler qu’il s’agit d’une recherche exploratoire qui présente des pistes intéressantes mais que ce qui en ressort ne peut en aucun cas être généralisé à une population plus large d’élèves.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
A Conversation with Howell Tong
Creators: name: Chan, Kung-Sik
name: Yao, Qiwei
Publisher: name: arXiv
Year: 2014
Subjects: subject: Other Statistics (stat.OT)
subject: FOS: Computer and information sciences

description: The following conversation is partly based on an interview that took place in the Hong Kong University of Science and Technology in July 2013.
description: Published in at http://dx.doi.org/10.1214/13-STS464 the Statistical Science (http://www.imstat.org/sts/) by the Institute of Mathematical Statistics (http://www.imstat.org)
title: D'où vient le lait ?
title: approche de la complexité centrée sur le pilier économique du développement durable
titleType: Subtitle
Creators: name: Epp, Sarah
Publisher: name: Unknown
Year: 0
Subjects: subject: Lait
subject: éducation au développement durable
subject: économie
subject: compréhension systémique
subject: catégorisation
subject: pensée sociale

description: J’ai réalisé en classe une séquence d’enseignement-apprentissage autour de la quesion « D’où vient le lait que nous buvons ? » J’ai mis cela en œuvre avec une approche orientée vers le développement durable, plus précisément vers le pilier économique. J’ai cherché à amener les élèves à développer deux modes de pensée utilisés dans les sciences sociales, à savoir « identifier et catégoriser » et « combiner et articuler les différents facteurs ». Par la suite, j’ai mis les élèves en situation de débat, face au dilemme suivant : Vaut-il mieux acheter le lait au supermarché ou en vente directe ? J’ai enregistré ces débats afin d’analyser à quels modes de pensée des sciences sociales les élèves faisaient appel pour motiver leur choix. J’ai également recherché l’influence de la pensée sociale sur leur discours. Les élèves sont partiellement parvenus à transférer les modes de pensée des sciences sociales acquis durant la séquence sur le lait. Ils ont tous réussi à identifier et catégoriser des acteurs du système, par contre certains peinaient à les nommer précisément. Environ la moitié des élèves a utilisé des éléments de compréhension systémique pour expliquer son choix et répondre aux questions. Les autres modes de pensée des sciences sociales qui n’avaient pas vraiment été abordées en classe n’ont été que très peu utilisées par les élèves. Concernant les choix, dans trois groupes sur quatre les élèves étaient tous du même avis. Les principes de répétition et de confirmations étaient présents et témoignaient du fonctionnement cognitif lié à la pensée sociale.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
STRATEGIC MANAGEMENT OF INTERNAL QUALITY ASSURANCE OF HIGHER EDUCATION IN IMPROVING THE QUALITY OF GRADUATES
Creators: name: FIDYA ARIE PRATAMA
name: SOFYAN SAURI
name: IKKA KARTIKA ABBAS FAUZI
name: AGUS MULYANTO
Publisher: name: Zenodo
Year: 2023
Subjects: Strategic Management, Internal Quality Assurance, Graduate Quality.

description: Abstract
This research is motivated by the phenomenon of the low quality of graduates produced by universities. BPS data proves that in 2022 universities will contribute 9.39% of the unemployment rate in Indonesia. This starts from the low quality assurance culture that exists in higher education. The general aim of this research is to describe and analyze strategic management of internal quality assurance in improving the quality of graduates in higher education. Specifically, this research aims to describe and analyze 1) strategic environment, 2) strategic formulation, 3) strategic implementation, 4) strategic evaluation, 5) strategic obstacles, and 6) solutions to strategic obstacles. The research method uses qualitative with a descriptive study approach. Data collection techniques use interviews, observation and documentation studies. The grand theory in this research is in accordance with Whellen and Hunger's opinion about strategic management, the middle theory uses Joseph Juran's opinion about total quality management, and the operational theory uses Edward Deming about quality. The research results specifically show that strategic management of internal quality assurance in improving the quality of college graduates is: 1) strategic environmental analysis carried out using strength, weakness, opportunity and threat (SWOT) analysis to analyze strength, weakness, opportunity and threat factors , 2) strategic formulation is carried out by formulating a vision and mission, determining institutional goals, developing strategies, and establishing policy guidelines, 3) strategic implementation is contained in the development program of 8 national education standards, 4) strategic evaluation is carried out programmatically through monitoring and evaluation activities, evaluation school self, accreditation and performance evaluation, 5) obstacles in strategic implementation lie in the lack of a quality culture, lack of human resources for internal quality auditors, weak control and improvement processes, 6) the solution to these obstacles can be done by developing a quality culture with 6 value systems (theological, logical, physiological, ethical, aesthetic and teleological). The research results generally show that strategic management of internal quality assurance in higher education in improving the quality of graduates has been implemented, but has not provided maximum impact.
La motivation à lire au travers des grands livres
Creators: name: Sallin, Lyse
name: Vullioud, Léticia
Publisher: name: Unknown
Year: 0
Subjects: subject: Grand livre
subject: Lecture
subject: Composantes de la lecture
subject: Motivation intrinsèque
subject: Motivation extrinsèque
subject: Travail en projet

description: Nous trouvons actuellement sur le marché un grand nombre de moyens et dispositifs d’enseignement de la lecture. Arrivés d’Amérique du Nord, les grands livres font leur apparition au sein de la Haute Ecole Pédagogique de Lausanne (HEPL) grâce à l’ouvrage « La lecture, de la théorie à la pratique » de Jocelyne Giasson. Le grand livre consiste en des exercices variés autour d’un album de littérature de jeunesse, le tout présenté dans un cartable à dessin. Les grands livres ont la particularité de prendre en compte les composantes de la lecture (Goigoux) ; l’acculturation, la production de textes, l’identification de mots et la compréhension de textes. Précisons que la lecture est l’apprentissage fondamental du premier cycle primaire. Il est donc important d’y entrer dès son plus jeune âge. Dans la vie de tous les jours et encore plus particulièrement lorsqu’il s’agit d’apprentissage, nous savons tous à quel point la motivation joue un rôle important. Nous faisons plus volontiers une tâche, une activité si nous sommes motivés par celle-ci ou pour celle-ci. Il en va de même en lecture. Au travers de notre recherche, nous avons tenté de répondre à la question : L’utilisation des grands livres influence-t-elle la motivation à lire des élèves du CYP1/2 ? Pour ce faire, nous avons fabriqué deux grands livres que nous avons introduits dans deux classes du premier cycle primaire. Le premier grand livre a été créé par les enseignantes tandis que le second était un travail en projet et a donc été conçu par les élèves. Afin de répondre à notre question de recherche, nous avons soumis un pré-test et un post-test aux élèves De plus, nous les avons observés lors de l’utilisation des grands livres. Si vous êtes à la recherche d’un dispositif didactique original et ludique pour motiver vos élèves à lire, nous vous invitons à poursuivre la lecture de ce mémoire professionnel.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Neutron scattering studies on URu2Si2
Creators: name: Bourdarot, Frederic
name: Raymond, Stephane
name: Regnault, Louis-Pierre
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: This paper is aiming to review some of the neutron scattering studies performed on URu2Si2 in Grenoble. This compound has been studied for a quarter of century because of a so-called hidden order ground state visible by most of the bulk experiments but almost invisible by microscopic probes like neutrons, muons NMR or x-ray. We stress on some aspects that were not addressed previously. Firstly, the comparison of the cell parameters in the 1-2-2 systems seems to point that the magnetic properties of URu2Si2 are leading by an U4+ electronic state. Secondly, a compilation of the different studies of the tiny antiferromagnetic moment indicates that the tiny antiferromagnetic moment has a constant value which may indicate that it is not necessary extrinsic. We also present the last development on the magnetic form factor measurement in which the magnetic density rotates when entering in the hidden order state. To end, the thermal dependence of the two most intense magnetic excitation at Q0=(1,0,0) and Q1=(0.6,0,0) seems to indicate two different origins or processes for these excitations.
description: 18 pages, 18 figures, published in Philosophical Magazine, 2014
Numerical Simulations of Optically Thick Accretion onto a Black Hole - II. Rotating Flow
Creators: name: Fragile, P. Chris
name: Olejar, Ally
name: Anninos, Peter
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this paper we report on recent upgrades to our general relativistic radiation magnetohydrodynamics code, Cosmos++, including the development of a new primitive inversion scheme and a hybrid implicit-explicit solver with a more general closure relation for the radiation equations. The new hybrid solver helps stabilize the treatment of the radiation source terms, while the new closure allows for a much broader range of optical depths to be considered. These changes allow us to expand by orders of magnitude the range of temperatures, opacities, and mass accretion rates, and move a step closer toward our goal of performing global simulations of radiation-pressure-dominated black hole accretion disks. In this work we test and validate the new method against an array of problems. We also demonstrate its ability to handle super-Eddington, quasi-spherical accretion. Even with just a single proof-of-principle simulation, we already see tantalizing hints of the interesting phenomenology associated with the coupling of radiation and gas in super-Eddington accretion flows.
description: 18 pages, 9 figures
La dictée à l'adulte comme support de l'entrée dans l'écrit au préscolaire
Creators: name: Esselborn, Magaly
Publisher: name: Unknown
Year: 0
Subjects: subject: Le langage
subject: l’entrée dans l’écrit
subject: la dictée à l’adulte
subject: les conventions liées à l’écrit
subject: les gestes du scripteur
subject: les interactions entre l’élève et le scripteur

description: Ce mémoire professionnel porte sur la dictée à l’adulte et plus précisément sur les apprentissages développés en rapport avec l’entrée dans l’écrit. Ce travail de recherche se base sur un projet pluridisciplinaire regroupant les disciplines suivantes : le français, les arts visuels et l’éducation aux médias et mis en place dans une classe de CIN. Afin de mieux cerner la construction des apprentissages en lien avec l’entrée dans l’écrit, le premier chapitre de ce mémoire professionnel apporte un éclairage théorique sur les éléments constitutifs de la dictée à l’adulte, à savoir : le langage et l’écrit. L’acquisition de ces deux modes de communication et d’expression ainsi que les principales activités présentes au CIN s’y rapportant comme la narration et la lecture d’albums de jeunesse y sont traités. Le deuxième chapitre est consacré à la définition de la problématique et de la question de recherche : « Comment et en quoi la dictée à l’adulte est- elle un outil favorisant l’apprentissage de l’écrit ? » Parallèlement à cette dernière, le déroulement du projet ayant permis la mise en place des dictées à l’adulte est explicité tout comme les outils d’évaluations ayant servis à l’analyse de ces dernières. Le troisième chapitre conduit à l’analyse des productions des élèves, suite aux trois différentes dictées à l’adulte menées au sein du projet. Chacune d’entre elle est évaluée à l’aide d’une grille d’évaluation ainsi que des trois étapes établies par Chartier, Clesse & Hébrard (1998). Un bilan est effectué pour toutes les dictées à l’adulte avec la mise en exergue des apprentissages sous-jacents. Le dernier chapitre clôt ce travail en apportant une réponse à la question de recherche. Au sein de cette dernière, les différents apprentissages développés lors de la démarche de dictée à l’adulte sont illustrés et mis en relation avec les apprentissages liés à l’entrée dans l’écrit.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Self-organized bistability on scale-free networks
Creators: name: Frolov, Nikita
name: Hramov, Alexander
Publisher: name: arXiv
Year: 2022
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: A dynamical system approaching the first-order transition can exhibit a specific type of critical behavior known as self-organized bistability (SOB). It lies in the fact that the system can permanently switch between the coexisting states under the self-tuning of a control parameter. Many of these systems have a network organization that should be taken into account to understand the underlying processes in detail. In the present paper, we theoretically explore an extension of the SOB concept on the scale-free network under coupling constraints. As provided by the numerical simulations and mean-field approximation in the thermodynamic limit, SOB on scale-free networks originates from facilitated criticality reflected on both macro- and mesoscopic network scales. We establish that the appearance of switches is rooted in spatial self-organization and temporal self-similarity of the network's critical dynamics and replicates extreme properties of epileptic seizure recurrences. Our results, thus, indicate that the proposed conceptual model is suitable to deepen the understanding of emergent collective behavior behind neurological diseases.
Efficient Generation of Model Bulk Heterojunction Morphologies for Organic Photovoltaic Device Modeling
Creators: name: Heiber, Michael C.
name: Dhinojwala, Ali
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Kinetic Monte Carlo (KMC) simulations have been previously used to model and understand a wide range of behaviors in bulk heterojunction (BHJ) organic photovoltaic devices, from fundamental mechanisms to full device performance. One particularly unique and valuable aspect of this type of modeling technique is the ability to explicitly implement models for the bicontinuous nanostructured morphology present in these devices. For this purpose, an Ising-based method for creating model BHJ morphologies has become prevalent. However, this technique can be computationally expensive, and a detailed characterization of this method has not yet been published. Here, we perform a thorough characterization of this method and describe how to efficiently generate controlled model BHJ morphologies. We show how the interaction energy affects the tortuosity of the interconnected domains and the resulting charge transport behavior in KMC simulations. We also demonstrate how to dramatically reduce calculation time by several orders of magnitude without detrimentally affecting the resulting morphologies. In the end, we propose standard conditions for generating model morphologies and introduce a new open-source software tool. These developments to the Ising method provide a strong foundation for future simulation and modeling of BHJ organic photovoltaic devices that will lead to a more detailed understanding of the important link between morphological features and device performance.
description: Main article: 9 pages, 6 figures, Supplementary Information: 6 pages, 6 figures
Dynamic freezing and defect suppression in the tilted one-dimensional Bose-Hubbard model
Creators: name: Divakaran, U.
name: Sengupta, K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the dynamics of tilted one-dimensional Bose-Hubbard model for two distinct protocols using numerical diagonalization for finite sized system ($N\le 18$). The first protocol involves periodic variation of the effective electric field $E$ seen by the bosons which takes the system twice (per drive cycle) through the intermediate quantum critical point. We show that such a drive leads to non-monotonic variations of the excitation density $D$ and the wavefunction overlap $F$ at the end of a drive cycle as a function of the drive frequency $ω_1$, relate this effect to a generalized version of Stückelberg interference phenomenon, and identify special frequencies for which $D$ and $1-F$ approach zero leading to near-perfect dynamic freezing phenomenon. The second protocol involves a ramp of both the electric field $E$ (with a rate $ω_1$) and the boson hopping parameter $J$ (with a rate $ω_2$) to the quantum critical point. We find that both $D$ and the residual energy $Q$ decrease with increasing $ω_2$; our results thus demonstrate a method of achieving near-adiabatic protocol in an experimentally realizable quantum critical system. We suggest experiments to test our theory.
description: v1:9+pages, 10 figs
Cotton Gin Operating Costs in the San Joaquin Valley of California -- 1971/72
Creators: name: Wilmot, Charles A.
name: Shaw, Dale L.
name: Heron, Betty K.
name: Wilmot, Charles A.
name: Shaw, Dale L.
name: Heron, Betty K.
Publisher: name: Unknown
Year: 1974
Subjects: subject: Crop Production/Industries
subject: Production Economics
subject: Cotton
subject: ginning
subject: costs
subject: rates
subject: capacity
subject: utilization

description: Capacity utilization and operating costs were analyzed for a sample of 41 gins representing 27 percent of the total ginning capacity and 26 percent of the total ginnings for the San Joaquin Valley of California during the 1971/72 season. Utilization of sample gin plant capacity averaged 53 percent, based on a typical ginning season of 906 operating hours and averages of 16.8 bales in rated hourly capacity and 6,754 bales in annual volume ginned. Operating costs per bale averaged: Out-of-pocket, $18.86; total, $23.24; and total standardized, $26.67.
Encoding and Information Transmission in Synaptically Coupled Neuronal Populations
Creators: name: Knoll, Gregory
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: spiking neuronale Netzwerke
subject: rekurrente synaptische Konnektivität
subject: Informationsfilterung
subject: synaptisches Rauschen und stochastische Resonanz
subject: spiking neural network
subject: recurrent synaptic connectivity
subject: information filtering
subject: synaptic noise and stochastic resonance
subject: 530 Physik

description: In dieser Arbeit versuche ich, den neuronalen Code, d. h. die Art und Weise, wie die Nervenzellen des Gehirns Informationen in ihrer Aktivität übertragen und verarbeiten, besser zu verstehen, indem ich die Kodierung von Stimuli in neuronalen Systemen untersuche. Zu diesem Zweck analysiere ich die Veränderungen in der Dynamik von neuronalen Standardmodellen, die im Rahmen der statistischen Physik entwickelt wurden, in Bezug auf Veränder- ungen der Parameter und der Konnektivität bei Vorhandensein bzw. Fehlen eines Reizes. Ich verwende informationstheoretische Maße, um die Fähigkeit neuronaler Populationen, empfangene Informationen durch ihren Output zu übertragen, zu quantifizieren. Die vorgestellten Ergebnisse bauen auf einer Vielzahl früherer Studien über unverbundene und rekurrente neuronale Pop- ulationen auf. Einige dieser Studien heben zwei neuronale Code-Kandidaten hervor, die unterschiedliche Profile der Informationsfilterung aufweisen: einen Integrationscode, der als Tiefpass-Informationsfilter fungiert, und einen Synchroniecode, der als Bandpassfilter fungiert. Das Ziel der vorliegenden Arbeit ist es, die Ergebnisse dieser Studien auf Netzwerke mit einem höheren Konnektivitätsgrad, wie er im Kortex beobachtet wird, auszuweiten.
description: In this thesis I attempt to better understand the neural code, or the way in which the nerve cells of the brain transmit and process information in their activity, through the investigation of stimulus encoding in neural systems. To this end, I analyze changes in the dynamics of standard neuronal models, de- veloped in the framework of statistical physics, to variations in parameters and connectivity in the presence versus the absence of a stimulus. In conjunction, information theoretical measures are utilized to quantify the ability of neu- ronal populations to transmit received information through their output. The presented results build upon a multitude of previous studies of both uncon- nected and recurrent neural populations. Some of these studies highlight two neural code candidates that have distinct information filtering profiles: an in- tegration code that acts as a low-pass information filter and a synchrony code that acts as a bandpass filter. In the following, synaptic connectivity is added in diverse ways in order to extend results of these studies to networks with a higher level of connectivity, as observed in the cortex.
Magneto-Optical Imaging of Vortex Domain Deformation in Pinning Sites
Creators: name: Badea, Robert
name: Frey, Johnathon A.
name: Berezovsky, Jesse
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We use a sensitive magneto-optical microscopy technique to image the magnetization response of micron-scale ferromagnetic disks to changes in applied magnetic field. This differential technique relies on a modulated applied magnetic field which allows us to measure changes in magnetization <1% with sub-micron resolution. The disks are magnetized in single vortex domains, with defects in the material serving to pin the vortex core at particular positions. By applying a small AC magnetic field, we measure the deformation of the magnetization while the core remains pinned. We can also characterize the strength of the pinning site by increasing the AC magnetic field to unpin the vortex core. While pinned, we find that the magnetization away from the core reorients slightly to better align with an applied field. Additionally, an applied field causes the pinned core itself to tilt in the direction of the field. Once the field is large enough to unpin the core, this tilt disappears, and the core instead translates across the disk.
description: 6 pages, 4 figures
New strategy for Multilayers packaging recycling
Creators: name: Rosato Antonella
name: Grazia, Totaro
name: Annamaria, Celli
name: Noura, Raddadi
name: Giulio, Zanaroli
name: Laura, Sisti
Publisher: name: Zenodo
Year: 2020
Subjects: multilayer recycling
enzymes
sustainability

description: Currently, multilayer packaging is widely used for the preservation and distribution of food, beverages, pharmaceuticals and other consumable products. However, if packaging materials are excellent in preserving, protecting and extending the useful life of the packaged goods, on the other hand their recycling is very demanding because of multimaterial layers, which cannot be simply separated and reused. Actually the majority of such packaging is either incinerated or bound for landfills.
 The European project H2020 TERMINUS [1] aims at designing a smart multilayer packaging able to self-delaminate at the end of its life, thus enabling the recycling of the different layers. The delamination strategy involves the use of protected enzymes within the multilayer formulation. After a specific trigger, the enzyme is released and degrades the adhesive anchoring the layers, causing debonding, thus layers can be separated and recycled.
 In detail, in the present study some enzymes with high degrading activity against some polymeric adhesives were protected, in order to increase their thermal stability and allow their use during the processing of the multilayer.
 With the successful implementation of TERMINUS project, the expected results will lead to a 15% of improved economy efficiency, 80% reduction of the landfilling rates for multilayer packaging as well as 50% decrease of overall landfilling rates of plastic, along with a 65% decrease in carbon dioxide emissions. [1] TERMINUS has received funding from the European Union’s Horizon 2020 research and innovation programme, under grant agreement number 814400.
description: poster for Ecomondo The Green Technology Expo
The Moutard transformation of two-dimensional Dirac operators and the Mobius geometry
Creators: name: Taimanov, Iskander A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We describe the action of the (Mobius) inversion on the data of the Weierstrass representation of surfaces in the three-space and show that the Moutard transformation of two-dimensional Dirac operators has a geometrical meaning: it maps the potential $U$ of a surface $S$ into the potential of its inversion.
description: 17 pages
Adaptive Collaborative Filtering with Personalized Time Decay Functions for Financial Product Recommendation
Creators: name: Ghiye, Ashraf
name: Barreau, Baptiste
name: Carlier, Laurent
name: Vazirgiannis, Michalis
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: Computational Finance (q-fin.CP)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: Classical recommender systems often assume that historical data are stationary and fail to account for the dynamic nature of user preferences, limiting their ability to provide reliable recommendations in time-sensitive settings. This assumption is particularly problematic in finance, where financial products exhibit continuous changes in valuations, leading to frequent shifts in client interests. These evolving interests, summarized in the past client-product interactions, see their utility fade over time with a degree that might differ from one client to another. To address this challenge, we propose a time-dependent collaborative filtering algorithm that can adaptively discount distant client-product interactions using personalized decay functions. Our approach is designed to handle the non-stationarity of financial data and produce reliable recommendations by modeling the dynamic collaborative signals between clients and products. We evaluate our method using a proprietary dataset from BNP Paribas and demonstrate significant improvements over state-of-the-art benchmarks from relevant literature. Our findings emphasize the importance of incorporating time explicitly in the model to enhance the accuracy of financial product recommendation.
description: 10 pages, 1 figure, 2 tables, to be published in the Seventeenth ACM Conference on Recommender Systems (RecSys '23)
Experimental observation of a phase transition in the evolution of many-body systems with dipolar interactions
Creators: name: Alvarez, Gonzalo A.
name: Suter, Dieter
name: Kaiser, Robin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Non-equilibrium dynamics of many-body systems is important in many branches of science, such as condensed matter, quantum chemistry, and ultracold atoms. Here we report the experimental observation of a phase transition of the quantum coherent dynamics of a 3D many-spin system with dipolar interactions, and determine its critical exponents. Using nuclear magnetic resonance (NMR) on a solid-state system of spins at room-temperature, we quench the interaction Hamiltonian to drive the evolution of the system. The resulting dynamics of the system coherence can be localized or extended, depending on the quench strength. Applying a finite-time scaling analysis to the observed time-evolution of the number of correlated spins, we extract the critical exponents v = s = 0.42 around the phase transition separating a localized from a delocalized dynamical regime. These results show clearly that such nuclear-spin based quantum simulations can effectively model the non-equilibrium dynamics of complex many-body systems, such as 3D spin-networks with dipolar interactions.
description: Maintext: 4 pages, 3 figures. Supplementary Information: 3 pages, 1 figure