cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Weil-Châtelet divisible elements in Tate-Shafarevich groups I: The Bashmakov problem for elliptic curves over Q
Creators: name: Çiperiani, Mirela
name: Stix, Jakob
Publisher: name: arXiv
Year: 2011
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G05, 11G10, 11R34

description: For an abelian variety A over a number field k we discuss the maximal divisibile subgroup of H^1(k,A) and its intersection with the subgroup Sha(A/k). The results are most complete for elliptic curves over Q.
description: 22 pages, changed title, the origional manuscript arXiv:1106.4255v1 was split in two parts according to Div-questions (part I) and div-questions (part II: Weil-Ch\^atelet divisible elements in Tate-Shafarevich groups II: On a question of Cassels)
Scalable Tight-Binding Model for Graphene
Creators: name: Liu, Ming-Hao
name: Rickhaus, Peter
name: Makk, Péter
name: Tóvári, Endre
name: Maurand, Romain
name: Tkatschenko, Fedor
name: Weiss, Markus
name: Schönenberger, Christian
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 530 Physik

description: Artificial graphene consisting of honeycomb lattices other than the atomic layer of carbon has been shown to exhibit electronic properties similar to real graphene. Here, we reverse the argument to show that transport properties of real graphene can be captured by simulations using "theoretical artificial graphene." To prove this, we first derive a simple condition, along with its restrictions, to achieve band structure invariance for a scalable graphene lattice. We then present transport measurements for an ultraclean suspended single-layer graphene pn junction device, where ballistic transport features from complex Fabry-P\'erot interference (at zero magnetic field) to the quantum Hall effect (at unusually low field) are observed and are well reproduced by transport simulations based on properly scaled single-particle tight-binding models. Our findings indicate that transport simulations for graphene can be efficiently performed with a strongly reduced number of atomic sites, allowing for reliable predictions for electric properties of complex graphene devices. We demonstrate the capability of the model by applying it to predict so-far unexplored gate-defined conductance quantization in single-layer graphene.
Error bounds for small jumps of Lévy processes
Creators: name: Dia, El Hadj Aly
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computational Finance (q-fin.CP)
subject: Probability (math.PR)
subject: FOS: Economics and business
subject: FOS: Mathematics

description: The pricing of options in exponential Levy models amounts to the computation of expectations of functionals of Levy processes. In many situations, Monte-Carlo methods are used. However, the simulation of a Levy process with infinite Levy measure generally requires either to truncate small jumps or to replace them by a Brownian motion with the same variance. We will derive bounds for the errors generated by these two types of approximation.
description: 21 pp
title: Différenciation pédagogique et mesure ordinaire d'enseignement spécialisé en contexte intégré :
title: essai de classification
titleType: Subtitle
title: Différenciation pédagogique et mesure ordinaire d'enseignement spécialisé en contexte intégré :
titleType: AlternativeTitle
Creators: name: Piemontesi, Angelina
name: Richard, Romain
Publisher: name: Unknown
Year: 0
Subjects: subject: Inclusion
subject: Différenciation pédagogique
subject: Intégration
subject: Mesures ordinaires d’enseignement spécialisé
subject: Hétérogénéité
subject: Projet 360°

description: Cette recherche s’inscrit dans un contexte scolaire vaudois en pleine mutation. Le Département de la formation, de la jeunesse et de la culture (DFJC) affiche une volonté inclusive par le déploiement du « Concept 360° » et par une refonte de son organisation via la fusion de la Direction générale de l’enseignement obligatoire (DGEO) et du Service de l’enseignement spécialisé et de l’appui à la formation (SESAF). Ces changements font apparaître un paradoxe. Comme le relèvent Doudin, Lafortune, Pons et Moreaux (2009), l’organisation de l’école vaudoise repose encore fortement sur une différenciation structurale via un éventail de mesures éloignant l’élève à besoins particuliers des classes régulières pour de courtes, moyennes ou longues périodes, ce qui semble peu compatible avec les exigences inclusives. Ces mesures sont les Classes de développement, les Classes-ressources et les Maitres de classe de développement itinérant (MCDI). Sur le terrain, ces prestations sont susceptibles de cohabiter au sein d’un même établissement, ce qui génère des questionnements relatifs aux logiques, aux pratiques et à l’organisation qui sous-tendent ces différentes modalités d’intervention. L’objectif poursuivi dans cette recherche vise donc à décrire et analyser les spécificités de ces trois mesures sous l’angle d’un continuum allant de l’intégration à l’inclusion mais également par les pratiques de différenciation pédagogique développées dans ces structures. Pour ce faire, nous avons eu recours à des entrevues semi-dirigées et avons interrogé neuf enseignants spécialisés travaillant dans les dispositifs et répartis dans trois établissements scolaires vaudois. Nos résultats indiquent, d’une part, que les dispositifs investigués fonctionnent encore largement sur une logique intégrative et normalisante (AuCoin et Vienneau, 2010) et d’autre part, que les pratiques différenciatrices ne sont pas propres à un dispositif ou un autre. Nos conclusions, même si elles ne peuvent être généralisées, pourront néanmoins s’avérer utiles dans le cadre de la rédaction des concepts d’établissements liés au projet « 360° ».
Coherent Photoproduction of pi^+ from 3^He
Creators: name: Nasseripour, Rakhsha
name: Berman, Barry
name: Collaboration, the CLAS
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We have measured the differential cross section for the $γ$$^3$He$\rightarrow π^+ t$ reaction. This reaction was studied using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Real photons produced with the Hall-B bremsstrahlung tagging system in the energy range from 0.50 to 1.55 GeV were incident on a cryogenic liquid $^3$He target. The differential cross sections for the $γ$$^3$He$\rightarrow π^+ t$ reaction were measured as a function of photon-beam energy and pion-scattering angle. Theoretical predictions to date cannot explain the large cross sections except at backward angles, showing that additional components must be added to the model.
description: 11 pages, 16 figures
Subcritical percolation with a line of defects
Creators: name: Friedli, S.
name: Ioffe, D.
name: Velenik, Y.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider the Bernoulli bond percolation process $\mathbb{P}_{p,p'}$ on the nearest-neighbor edges of $\mathbb{Z}^d$, which are open independently with probability $pp_c'$. Moreover, $p_c'(p,2)=p_c'(p,3)=p$, and $p_c'(p,d)>p$ for $d\geq 4$. We also analyze the behavior of $ξ_p-ξ_{p,p'}$ as $p'\downarrow p_c'$ in dimensions $d=2,3$. Finally, we prove that when $p'>p_c'$, the following purely exponential asymptotics holds: \[\mathbb {P}_{p,p'}(0\leftrightarrow n\mathbf {e}_1)=ψ_de^{-ξ_{p,p'}n}\bigl(1+o(1)\bigr)\] for some constant $ψ_d=ψ_d(p,p')$, uniformly for large values of $n$. This work gives the first results on the rigorous analysis of pinning-type problems, that go beyond the effective models and don't rely on exact computations.
description: Published in at http://dx.doi.org/10.1214/11-AOP720 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
The local quantization behavior of absolutely continuous probabilities
Creators: name: Graf, Siegfried
name: Luschgy, Harald
name: Pagès, Gilles
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: For a large class of absolutely continuous probabilities $P$ it is shown that, for $r>0$, for $n$-optimal $L^r(P)$-codebooks $α_n$, and any Voronoi partition $V_{n,a}$ with respect to $α_n$ the local probabilities $P(V_{n,a})$ satisfy $P(V_{a,n})\approx n^{-1}$ while the local $L^r$-quantization errors satisfy $\int_{V_{n,a}}|x-a|^r dP(x)\approx n^{-(1+r/d)}$ as long as the partition sets $V_{n,a}$ intersect a fixed compact set $K$ in the interior of the support of $P$.
description: Published in at http://dx.doi.org/10.1214/11-AOP663 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
New insights into the cross-linking and degradation mechanism of Diels–Alder hydrogels
Creators: name: Kirchhof, Susanne
name: Strasser, Andrea
name: Wittmann, Hans-Joachim
name: Messmann, Viktoria
name: Hammer, Nadine
name: Goepferich, Achim
name: Brandl, Ferdinand
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 615 Pharmazie

description: Eight-armed poly(ethylene glycol) was functionalized with furyl and maleimide groups. The two macromonomers were cross-linked by Diels–Alder (DA) reactions and the degradation behavior of the formed hydrogels was investigated. UV spectroscopy showed that maleimide groups were subject to ring-opening hydrolysis above pH 5.5, with the reaction rate depending on the pH and temperature. As a result of this, the gelation kinetics and stiffness of DA hydrogels were dependent on the temperature and the pH of the cross-linking medium, as demonstrated by rheological experiments. The gel time varied between 87.8 min (pH 3.0, 37 °C) and 374.7 min (pH 7.4, 20 °C). Values between 420 Pa (pH 9.0, 37 °C) and 3327 Pa (pH 3.0, 37 °C) were measured for the absolute value of the complex shear modulus. Hydrogel swelling and degradation were influenced by the same parameters. With increasing pH and temperature the degradation time was reduced from 98 days (pH 7.4, 20 °C) to 2 days (pH 7.4, 50 °C); no degradation was observed at pH 3.0 and 5.5. Molecular modeling studies of the DA and retro-Diels–Alder (rDA) moieties revealed that hydrogel degradation occurred by rDA reaction followed by OH−-catalyzed ring-opening hydrolysis of maleimide groups to unreactive maleamic acid derivatives.
description: OA-Komponente aus der Allianzlizenz
The production and crystallization of amorphous Fe-C alloys
Creators: name: Lawrence, Benjamin
Publisher: name: University of British Columbia
Year: 2017

description: The production and crystallization of amorphous iron-carbon alloys has been investigated experimentally. A physical vapour deposition (PVD) technique has been developed at UBC to create films with a variety of carbon contents. A system using controlled flow of reactive gas has been developed to allow the variation of carbon content, and films have been shown to have a reproducible amorphous structure and consistent chemistry. Characterization of the chemistry and structure of the as-sputtered alloys has been performed. Amorphous films were annealed to assess the kinetics of crystallization. For films containing less than 25 at.% carbon, a two-stage crystallization involving the formation of ferrite followed by cementite was observed at low temperatures. The structure and chemistry of these crystallization products were characterized by x-ray diffraction, electron microscopy and atom probe tomography. In-situ annealing was also per- formed in transmission electron microscopy, allowing for direct observation of the nucleation and growth of the product phases. This annealing study showed a significant decrease in the nucleation and growth rate of ferrite within the amorphous matrix. Simple models of diffusion-controlled and interface-controlled growth were not able to capture this slowing of the transformation. In addition to thermodynamic factors, it is proposed that the ferrite growth rate is strongly affected by a decrease in diffusivity arising from aging of the amorphous matrix and its enrichment in carbon during crystallization. Alloy films containing more than 25 at.% carbon were also found to crystallize in a two-stage process during annealing. This crystallization involved the initial formation of ferrite and cementite, with a secondary formation of cementite to fully consume the original structure. This two-step process has not been previously reported in the related literature. The secondary crystallization led to large grains of cementite that exhibited a systematic lattice compression in the [010] direction. The final cementite structure was found to have a super-stoichiometric carbon concentration that can only be possible via a process of ‘chemical twinning’. While faulting on the correct lattice plans was observed, no diffraction evidence for such ‘chemical twinning’ could be identified. This is proposed as an area for future research.
Proofs of power sum and binomial coefficient congruences via Pascal's identity
Creators: name: MacMillan, Kieren
name: Sondow, Jonathan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Number Theory (math.NT)
subject: History and Overview (math.HO)
subject: FOS: Mathematics
subject: 11A07 (Primary), 11B65 (Secondary)

description: A frequently cited theorem says that for n > 0 and prime p, the sum of the first p n-th powers is congruent to -1 modulo p if p-1 divides n, and to 0 otherwise. We survey the main ingredients in several known proofs. Then we give an elementary proof, using an identity for power sums proven by Pascal in 1654. An application is a simple proof of a congruence for certain sums of binomial coefficients, due to Hermite and Bachmann.
description: 4 pages, to appear in Amer. Math. Monthly
Supplementary material from Structured illumination ophthalmoscope: super-resolution microscopy on the living human eye
Creators: name: Schock, Florian
name: Best, Gerrit
name: Celik, Nil
name: Heintzmann, Rainer
name: Dithmar, Stefan
name: Cremer, Christoph
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Biophysics
subject: 20599 Optical Physics not elsewhere classified
subject: FOS: Physical sciences
subject: 111303 Vision Science
subject: FOS: Clinical medicine
subject: 90399 Biomedical Engineering not elsewhere classified
subject: FOS: Medical engineering
subject: 30101 Analytical Spectrometry
subject: FOS: Chemical sciences
subject: 29903 Medical Physics

description: In this paper, we present the prototype of an ophthalmoscope that uses structured illumination microscopy (SIM) to enable super-resolved imaging of the human retina, and give first insights into clinical application possibilities. The SIM technique was applied to build a prototype that uses the lens of the human eye as an objective to ‘super-resolve’ the retina of a living human. In our multidisciplinary collaboration, we have adapted this well-established technique in ophthalmology and successfully imaged a human retina using significantly lower light intensity than a state-of-the-art ophthalmoscope. Here, we focus on the technical implementation and highlight future perspectives of this method. A more application-oriented note for physicians on the diagnostic and disease-preventive value of thisThis article is part of the theme issue ‘Super-resolution structured illumination microscopy (part 2)’.
Suprema of Lévy processes
Creators: name: Kwaśnicki, Mateusz
name: Małecki, Jacek
name: Ryznar, Michał
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: In this paper we study the supremum functional $M_t=\sup_{0\le s\le t}X_s$, where $X_t$, $t\ge0$, is a one-dimensional Lévy process. Under very mild assumptions we provide a simple, uniform estimate of the cumulative distribution function of $M_t$. In the symmetric case we find an integral representation of the Laplace transform of the distribution of $M_t$ if the Lévy-Khintchin exponent of the process increases on $(0,\infty)$.
description: Published in at http://dx.doi.org/10.1214/11-AOP719 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Non-Abelian gauge fields in the gradient expansion: generalized Boltzmann and Eilenberger equations
Creators: name: Gorini, Cosimo
name: Schwab, Peter
name: Raimondi, Roberto
name: Shelankov, Andrei L.
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: 530 Physik

description: We present a microscopic derivation of the generalized Boltzmann and Eilenberger equations in the presence of non-Abelian gauges for the case of a nonrelativistic disordered Fermi gas. A unified and symmetric treatment of the charge [U(1)] and spin [SU(2)] degrees of freedom is achieved. Within this framework, just as the U(1) Lorentz force generates the Hall effect, so does its SU(2) counterpart gives rise to the spin Hall effect. Considering elastic and spin-independent disorder we obtain diffusion equations for charge and spin densities and show how the interplay between an in-plane magnetic field and a time-dependent Rashba term generates in-plane charge currents.
Quasiclassical approach to the spin Hall effect in the two-dimensional electron gas
Creators: name: Raimondi, Roberto
name: Gorini, Cosimo
name: Schwab, Peter
name: Dzierzawa, Michael
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: 530 Physik

description: We study the spin-charge coupled transport in a two-dimensional electron system using the method of quasiclassical (ξ-integrated) Green’s functions. In particular we derive the Eilenberger equation in the presence of a generic spin-orbit field. The method allows us to study spin and charge transport from ballistic to diffusive regimes and continuity equations for spin and charge are automatically incorporated. In the clean limit we establish the connection between the spin Hall conductivity and the Berry phase in momentum space. For finite systems we solve the Eilenberger equation numerically for the special case of the Rashba spin-orbit coupling and a two-terminal geometry. In particular, we calculate explicitly the spin Hall induced spin polarization in the corners, predicted by Mishchenko et al. [Phys. Rev. Lett. 93, 226602 (2004)]. Furthermore we find universal spin currents in the short-time dynamics after switching on the voltage across the sample, and calculate the corresponding spin Hall polarization at the edges. Where available, we find perfect agreement with analytical results.
Linear Cellular Automata as Discrete Models for Generating Cryptographic Sequences
Creators: name: Caballero-Gil, Pino
name: Fúster-Sabater, Amparo
name: Delgado-Mohatar, Oscar
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: In this paper, we develop a new cellular automata-based linear model for several nonlinear pseudorandom number generators with practical applications in symmetric cryptography. Such a model generates all the solutions of linear binary difference equations as well as many of these solutions are pseudo-random keystream sequences. In this way, a linear structure based on cellular automata may be used to generate not only difference equation solutions but also cryptographic sequences. The proposed model is very simple since it is based exclusively on successive concatenations of a basic linear automaton.
Spin-Charge Locking and Tunneling into a Helical Metal
Creators: name: Schwab, Peter
name: Raimondi, Roberto
name: Gorini, Cosimo
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 530 Physik

description: We derive a kinetic equation for the electrons moving on the surface of a threedimensional topological insulator. Due to the helical nature of the excitations backward scattering is suppressed in the collision integral, and the spin dynamics is entirely constrained by that of the charge. We further analyze the tunneling between the helical metal and a conventional metal or ferromagnet. We find that the tunnel resistance strongly depends on the angle between the magnetization in the ferromagnet and the current in the helical metal. A nonmagnetic layer on top of the helical metal amplifies the current-induced spin polarization
title: Enjeux identitaires chez l'enseignant spécialisé dans et par l'interaction entre un enseignant spécialisé et un éducateur dans un groupe classe :
title: Eléments de compréhension de la construction identitaire de l’enseignant spécialisé en situation d’interaction avec un éducateur à travers le discours des acteurs de terrain dans deux institutions vaudoises
titleType: Subtitle
title: Enjeux identitaires chez l'enseignant spécialisé dans et par l'interaction entre un enseignant spécialisé et un éducateur dans un groupe classe :
titleType: AlternativeTitle
Creators: name: Jeannot, Céline
name: Schmitz, Tiziana
Publisher: name: Unknown
Year: 0
Subjects: subject: construction identitaire
subject: enseignant spécialisé
subject: travail d’enseignement
subject: travail éducatif
subject: négociation
subject: collaboration

description: Ce travail s’intéresse à découvrir l’influence, dans le processus de construction identitaire des enseignants spécialisés, d’un contexte de travail en binôme avec un éducateur. Cette recherche a été menée en récoltant des données par entretiens compréhensifs auprès de cinq enseignants spécialisés exerçant dans des classes d’enseignement spécialisé appartenant à deux institutions vaudoises différentes. Ce questionnement sur la construction identitaire se verra apporter des éléments de compréhension suivant trois axes. Un premier axe porte sur les représentations des enseignants spécialisés à propos du travail d’enseignement et du travail éducatif. Il met en relief le lien étroit mis en avant par les enseignants entre le travail éducatif et le travail d’enseignement. Le deuxième axe concerne les représentations à propos des relations de collaborations professionnelles avec un éducateur. Il donne à voir les aspects dynamiques et complexes des relations professionnelles dans des espaces de travail commun à l’enseignant et à l’éducateur. Il montre ainsi comment se jouent, dans ces espaces, des négociations constructives ou non. Des éléments sur lesquels s’appuient ces relations professionnelles sont également identifiés. Le troisième axe porte sur les aspects de construction identitaire. Il souligne à la fois le cheminement et l’intégration propre à chaque personne mais également l’impact de la présence de l’éducateur. Ceci se traduit alors par une acceptation ou un rejet par l’enseignant de l’image projetée sur lui par l’éducateur. Cette recherche illustre comment la présence d’un autrui travaillant en binôme avec un enseignant spécialisé a des répercussions sur la construction identitaire des enseignants, notamment par les jeux interactionnels dans les relations de collaboration professionnelle. Les conclusions de ce travail interrogent l’importance des différences entre professions, en débouchant sur la question suivante : y a-t-il une spécificité ou non au fait que cet autrui exerce le métier d’éducateur ?
Stochastic shear thickening fluids: Strong convergence of the Galerkin approximation and the energy equality
Creators: name: Yoshida, Nobuo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider a stochastic partial differential equation (SPDE) which describes the velocity field of a viscous, incompressible non-Newtonian fluid subject to a random force. Here, the extra stress tensor of the fluid is given by a polynomial of degree p-1 of the rate of strain tensor, while the colored noise is considered as a random force. We focus on the shear thickening case, more precisely, on the case $p\in [1+{\frac{d}{2}},{\frac{2d}{d-2}})$, where d is the dimension of the space. We prove that the Galerkin scheme approximates the velocity field in a strong sense. As a consequence, we establish the energy equality for the velocity field.
description: Published in at http://dx.doi.org/10.1214/11-AAP794 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Spin Hall effect in a 2DEG in the presence of magnetic couplings
Creators: name: Gorini, Cosimo
name: Schwab, Peter
name: Dzierzawa, Michael
name: Raimondi, Roberto
name: Milletarì, Mirco
Publisher: name: Universität Regensburg
Year: 2009
Subjects: subject: 530 Physik

description: It is now well established that the peculiar linear-in-momentum dependence of the Rashba (and of the Dresselhaus) spin-orbit coupling leads to the vanishing of the spin Hall conductivity in the bulk of a two-dimensional electron gas (2DEG). In this paper we discuss how generic magnetic couplings change this behaviour providing then a potential handle on the spin Hall effect. In particular we examine the influence of magnetic impurities and an in-plane magnetic field. We find that in both cases there is a finite spin Hall effect and we provide explicit expressions for the spin Hall conductivity. The results can be obtained by means of the quasiclassical Green function approach, that we have recently extended to spin-orbit coupled electron systems.
title: Qu'est-ce qui motive une enseignante ordinaire à devenir enseignante spécialisée ?
title: Qu'est-ce qui motive une enseignante ordinaire à devenir enseignante spécialisée ?
titleType: AlternativeTitle
Creators: name: André, Céline
name: Clisson, Lara
Publisher: name: Unknown
Year: 0
Subjects: subject: enseignement spécialisé
subject: transition
subject: identité
subject: valeurs
subject: histoire de vie

description: Questionnées par notre propre parcours professionnel, nous avons cherché à savoir quelles étaient les motivations qui poussaient les enseignantes ordinaires à effectuer une bifurcation vers l’enseignement spécialisé à un moment de leur trajectoire. Notre environnement actuel est favorable à ces transitions, autant par la valorisation que l’on en fait que par les éventuelles facilitations qui sont mises en avant lors de la formation. Mais qu’en est-il de l’identité de ces actrices de la transition, à quels mouvements leur identité est-elle soumise à ce moment-là ? La bifurcation fait-elle suite à une crise ou bien est-elle vécue comme une continuité ? Y a-t-il des valeurs mises en tension dans cette décision ? Qui sont les personnes ayant influencé ce choix ? Quelle est la place de l’ancien métier dans la reconversion ? Autant de questions que nous avons abordées dans ce travail. Nous nous inscrivons dans une démarche compréhensive, et nous sommes inspirées de la méthode histoire de vie qui a pour but de co-construire du sens avec les participantes au travers du matériau biographique. Nous avons ainsi récolté sept récits de vie singuliers dans lesquels nous avons observé les récurrences nous permettant d’apporter des éléments de réponse à notre question de recherche. Nous nous sommes également penchées sur les effets formateurs d’une telle démarche sur les chercheuses et sur les participantes. Nous avons pu mettre en avant certains points qui, d’après nous, peuvent motiver les enseignantes à effectuer une telle reconversion : le vécu personnel semble être un facteur important, notamment pendant l’enfance. Dans le contexte professionnel, les rencontres et les opportunités en lien avec l’enseignement spécialisé ont pu influencer le choix de la transition. L’insatisfaction face à l’enseignement ordinaire, à plusieurs niveaux, y joue également un rôle. Finalement, nos participantes semblent être animées par des valeurs communes qui ont apparemment plus de place pour se manifester dans le contexte spécialisé.
Security Cooperation in the Pacific: Workshop Report
Creators: name: Wallis, Joanne
name: McNeill, Henrietta
name: Batley, James
name: Powles, Anna
Publisher: name: Canberra, ACT: Dept. of Pacific Affairs, Coral Bell School of Asia Pacific Affairs, The Australian National University
Year: 2022
Subjects: Pacific
Security
Pacific regionalism
Regionalism
Biketawa Declaration
Pacific Islands Forum
Regional security
security challenges

description: In November 2021 an online workshop was held to better understand security cooperation between partner states; between PICs themselves, and with their citizens; and between partners, PICs and citizens. The goal of the workshop was to discuss papers that are intended to form the basis of chapters in an edited book about security cooperation in the Pacific Islands. Speakers came from a range of PICs, as well as their major partner states, including Australia, China, Fiji, Japan, New Caledonia, New Zealand, Papua New Guinea, Samoa, Solomon Islands and the US. The PIF Secretariat also attended part of the workshop as an observer. Panels were organised around three key areas: regional security cooperation; the role of partner states in security cooperation; and security cooperation to address specific security challenges. This paper deals with each of these three areas before considering the question: ‘who is accountable to whom in the provision of security assistance?’
Quasiclassical approach and spin-orbit coupling
Creators: name: Gorini, Cosimo
name: Schwab, Peter
name: Dzierzawa, Michael
name: Raimondi, Roberto
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: EP2DS-17; Manuscript; LaTeX-2e; Style files
subject: 530 Physik

description: We discuss the quasiclassical Green function method for a two-dimensional electron gas in the presence of spin–orbit coupling, with emphasis on the meaning of the ξξ-integration procedure. As an application of our approach, we demonstrate how the spin-Hall conductivity, in the presence of spin-flip scattering, can be easily obtained from the spin-density continuity equation.
New Attack Strategy for the Shrinking Generator
Creators: name: Caballero-Gil, Pino
name: Fúster-Sabater, Amparo
name: Pazo-Robles, M. Eugenia
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: This work shows that the cryptanalysis of the shrinking generator requires fewer intercepted bits than what indicated by the linear complexity. Indeed, whereas the linear complexity of shrunken sequences is between $A \cdot 2^(S-2)$ and $A \cdot 2^(S-1)$, we claim that the initial states of both component registers are easily computed with less than $A \cdot S$ shrunken bits. Such a result is proven thanks to the definition of shrunken sequences as interleaved sequences. Consequently, it is conjectured that this statement can be extended to all interleaved sequences. Furthermore, this paper confirms that certain bits of the interleaved sequences have a greater strategic importance than others, which may be considered as a proof of weakness of interleaved generators.
Perspectives of accessing and providing prenatal nutrition care in a rural First Nations community: a collaborative, qualitative case study
Creators: name: Mercer, Rebecca
Publisher: name: University of British Columbia
Year: 2017

description: Women living in rural First Nations communities face challenges accessing adequate nutrition and nutrition care during pregnancy, creating a barrier to achieving optimal maternal, fetal and newborn health outcomes. Key policy documents have highlighted the importance of understanding and giving voice to First Nation women with regard to antenatal programming including nutrition care. First Nation communities are marked by low rates of recruitment and retention of health care providers, as these professionals are often required to provider a broader scope of practice and have a higher workload than their urban counterparts. Understanding both women and provider perspectives is a key step to improving efficacy of antenatal services. This qualitative project is a collaboration between First Nations Health Authority, Haisla Nation, and The University of British Columbia. Using a community-centric, case study framework, we explored the experiences of the birthing population and care providers of accessing and providing nutrition care and programs within the Northern community of Kitamaat Village (Haisla Nation), British Columbia. Data collection consisted of open-ended interviews with 13 pregnant or recently pregnant women and 4 care providers within Haisla Nation. The lead researcher transcribed interview transcripts verbatim and textual data was analyzed using qualitative computer software (nVivo, QRS International Pty. Ltd). Transcripts underwent inductive coding and thematic analysis according to Braun and Clarke. Main themes that resulted from analysis included the perceived value and experience of current antenatal nutrition programs; lack of nutrition advice provided within primary care setting; the role for nutrition specialist within Haisla Nation; and the importance of traditional foods and practices during pregnancy. By gaining insight on how nutrition care is accessed, perceived and provided within Haisla Nation using a community centric model we are able to use the knowledge gained to further the provision of nutrition care during the antenatal period for First Nation women. The success of current programs within this community, as well as the process developed to understand the on the ground experiences have potential to be adapted in other First Nation communities in British Columbia to tailor prenatal nutrition programming across the province.
title: Pratiquer la sanction à l'école :
title: un travail d’équilibriste ?
titleType: Subtitle
title: Pratiquer la sanction à l'école :
titleType: AlternativeTitle
Creators: name: Desponds, Léonard
Publisher: name: Unknown
Year: 0
Subjects: subject: sanctions
subject: normes
subject: transgressions
subject: déviance
subject: enseignement
subject: prévention

description: Ce travail de mémoire se penche sur le thème de la sanction en milieu scolaire. Il existe une zone grise relative à l’acceptation de ce que sont les normes scolaires, les transgressions d’élèves et les sanctions susceptibles d’être mises en place par certain-e-s enseignant-e-s. De plus, le rapport à la gestion des comportements considérés comme déviants par l’institution scolaire est parfois flou. Ce travail s’articule autour de cinq questions principales : - de quelle nature sont les sanctions scolaires ? - comment l’expérience dans le métier influence-t-elle la pratique de la sanction ? - comment serait-il possible de prévenir les transgressions ? - la sanction est-elle pratiquée individuellement ou de façon collective ? - comment la sanction est-elle pratiquée au quotidien dans l’établissement où j’effectue mon stage ? Les données qualitatives ont été récoltées en allant au contact d’enseignant-e-s sur mon lieu de stage pour m’entretenir avec eux-elles, connaître leur expérience quotidienne de la pratique de la sanction en classe et en observant les pratiques effectives en réalisant des observations in situ. Ce travail de mémoire a pour objectif de présenter des pistes de réflexion en croisant les données récoltées dans le cadre de ma recherche avec les observations menées dans les recherches existantes en sociologie et en sciences de l’éducation. Nous mettrons en lumière l’interdépendance entre les normes scolaires qui font office de référence en ce qui concerne les comportements adéquats, les transgressions qui sont les écarts à la norme et les sanctions qui sont les réactions à ces transgressions. Nous démontrerons également la complexité du contexte et le nombre élevé de variables qui influencent les pratiques de la sanction scolaire.
Visible light C–H amidation of heteroarenes with benzoyl azides
Creators: name: Brachet, Etienne
name: Ghosh, Tamal
name: Ghosh, Indrajit
name: König, Burkhard
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 540 Chemie

description: Benzoyl azides were used for the direct and atom economic C–H amidation of electron rich heteroarenes in the presence of phosphoric acid, a photocatalyst and visible light. Hetero-aromatic amides are obtained in good yields at very mild reaction conditions with dinitrogen as the only by-product. The reaction allows the use of aryl-, heteroaryl- or alkenyl acyl azides and has a wide scope for heteroarenes, including pyrroles, indole, furan, benzofuran and thiophene giving good regio-selectivities and yields.
description: Open Access Komonente aus der Allianzlizenz
Convergence of the largest singular value of a polynomial in independent Wigner matrices
Creators: name: Anderson, Greg W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: For polynomials in independent Wigner matrices, we prove convergence of the largest singular value to the operator norm of the corresponding polynomial in free semicircular variables, under fourth moment hypotheses. We actually prove a more general result of the form "no eigenvalues outside the support of the limiting eigenvalue distribution." We build on ideas of Haagerup-Schultz-Thorbjørnsen on the one hand and Bai-Silverstein on the other. We refine the linearization trick so as to preserve self-adjointness and we develop a secondary trick bearing on the calculation of correction terms. Instead of Poincaré-type inequalities, we use a variety of matrix identities and $L^p$ estimates. The Schwinger-Dyson equation controls much of the analysis.
description: Published in at http://dx.doi.org/10.1214/11-AOP739 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Endoscope Geometric Distortion- A Method for Quantitative Evaluation
Creators: name: Regulatory Catalog
Publisher: name: Zenodo
Year: 2023

description: This tool is a method to evaluate endoscope geometric distortion. Current methods to evaluate endoscope geometric distortion are either too difficult to understand or too simple to accurately describe complex geometric distortion. The method overcomes these limitations, has clear physical meaning, and can facilitate lesion size estimation during diagnosis.
title: Facteurs d’influence de la satisfaction des nouveaux enseignants du secondaire I vis-à-vis de leur insertion professionnelle
title: Facteurs d’influence de la satisfaction des nouveaux enseignants du secondaire I vis-à-vis de leur insertion professionnelle
titleType: AlternativeTitle
Creators: name: Demierre, Cécile
name: Dessarzin, Romain
Publisher: name: Unknown
Year: 0

description: Le présent mémoire s’intéresse aux facteurs qui influencent la satisfaction des diplômé.e.s d’un Master en enseignement secondaire I à la Haute École Pédagogique de Lausanne en analysant l’impact de plusieurs variables sur le sentiment de satisfaction lié à l’insertion professionnelle. Les objectifs de la recherche sont les suivants : a) identifier des facteurs principaux pouvant influencer la satisfaction des diplômé.e.s vis-à-vis de leur insertion professionnelle, b) vérifier empiriquement l’impact de ces facteurs grâce à des données récoltées auprès de jeunes diplômé.e.s, c) identifier des facteurs secondaires exprimés par les personnes interrogées. Afin d’analyser l’impact de ces facteurs nous avons adopté une méthode mixte : quantitative puis qualitative. Toutes deux ont été réalisées à partir d’un panel de réponses à un questionnaire récoltées par l’enquête INSERCH. Plusieurs variables ont été isolées à partir des réponses de l’enquête puis testées pour attester de leur effet sur la variable centrale : la satisfaction ressentie à l’égard de l’insertion professionnelle. Une fois cette étude quantitative réalisée, nous avons concentré notre approche autour d’une question ouverte à l’occasion de laquelle les sujets interrogés devaient justifier la note choisie pour évaluer leur satisfaction générale à l’égard de leur insertion professionnelle. En regroupant ces réponses par facteurs exprimés, nous avons pu faire apparaître des tendances confirmant nos premiers résultats. Cette analyse qualitative nous a également permis de découvrir d’autres facteurs que nous avons listés et discutés. Les principaux résultats de la recherche démontrent que le type de contrat, le taux d’activité, la satisfaction du taux d’activité, la satisfaction des conditions d’emploi et la satisfaction vis-à-vis des relations professionnelles sont des facteurs qui influencent la satisfaction alors que l’enseignement de disciplines sans diplôme est un facteur sans influence. D’autre part, le discours des participant.e.s a aussi permis de faire émerger d’autres facteurs importants permettant d’expliquer la satisfaction ou l’insatisfaction tels que le plaisir à enseigner ou la reconnaissance des pairs. En somme, ce mémoire apporte un certain éclairage sur les facteurs qui influencent la réussite ou l’échec d’une insertion professionnelle dans l’enseignement. Malgré la pertinence de cette démarche, il convient de noter que les résultats du présent travail ne proviennent que d’un échantillon limité. Des études supplémentaires et à plus large échelle seront donc nécessaires pour répondre à toutes les questions que soulève l’insertion professionnelle des jeunes diplômé.e.s de l’enseignement.
csfyshvvcqcnqdszynvcmshtrtcsqvsy.pdf
Creators: name: Hemmatpour, Masoud
name: Rebaudengo, Maurizio
name: Montrucchio, Bartolomeo
name: Karimshoushtari, Milad
name: Rodi, Luca
name: Brucculeri, Calogero
name: Manconi, Claudio
name: Shahshahani, Amirhossein
name: Bhadra, Sharmistha
Publisher: name: figshare
Year: 2022
Subjects: subject: Health Care
subject: 111712 Health Promotion
subject: FOS: Health sciences
subject: 80702 Health Informatics
subject: FOS: Media and communications
subject: 111702 Aged Health Care

description: Nimble is a holistic approach for fall prevention, prediction and detection system.
Electrical Spin Injection into High Mobility 2D Systems
Creators: name: Oltscher, M.
name: Ciorga, M.
name: Utz, M.
name: Schuh, Dieter
name: Bougeard, Dominique
name: Weiss, Dieter
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: 530 Physik

description: We report on spin injection into a high mobility 2D electron system confined at an (Al,Ga)As/GaAs interface, using (Ga,Mn)As Esaki diode contacts as spin aligners. We measured a clear nonlocal spin valve signal, which varies nonmonotonically with the applied bias voltage. The magnitude of the signal cannot be described by the standard spin drift-diffusion model, because at maximum this would require the spin polarization of the injected current to be much larger than 100%, which is unphysical. A strong correlation of the spin signal with contact width and electron mean free path suggests that ballistic transport in the 2D region below ferromagnetic contacts should be taken into account to fully describe the results.
On the energy spectrum of Yang--Mills instantons over asymptotically locally flat spaces
Creators: name: Etesi, Gabor
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this paper we prove that over an asymptotically locally flat (ALF) Riemannian four-manifold the energy of an "admissible" SU(2) Yang--Mills is always integer. This result sharpens the previously known energy identity for such Yang--Mills instantons over ALF geometries. Furthermore we demonstrate that this statement continues to hold for the larger gauge group U(2). Finally we make the observation that there might be a natural relationship between 4 dimensional Yang--Mills theory over an ALF space and 2 dimensional conformal field theory. This would provide a further support for the existence of a similar correspondence investigated by several authors recently.
description: LaTeX, no figures, 18 pp, final published version
Preparation of Luminescent Chemosensors by Post-Functionalization of Vesicle Surfaces
Creators: name: Müller, Andreas
name: König, Burkhard
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 540 Chemie

description: Surface-reactive luminescent vesicles were prepared by self-assembly of phospholipids, amphiphilic maleimides and fluorophors in aqueous solution. Those preformed liposomes were functionalized with various thiolated receptor units using a thiol-click reaction. As recognition elements, a bis-Zn2+-cyclen derivative for the detection of phosphate moieties or a DNA aptamer for the specific binding of the antibiotic ampicillin were utilized. A FRET-based assay revealed the close spatial proximity of the membrane-embedded dansyl molecules with the subsequently immobilized thiols, which is the origin for the signaling mechanism of the obtained vesicular sensors. Those receptor-functionalized liposomes indicate the binding of the targets to their surface by changes of the fluorescence emission properties of the membrane co-embedded carboxyfluorescein dyes. The post-functionalization concept can also be used for molecular imprinting on vesicle surfaces. The template-guided patterning of receptors based on bis-Zn2+-cyclen resulted in fluorescent sensors suitable for the specific recognition of a bivalent peptide.
description: Open Access Komponente aus der Allianzlizenz
Inverse Spin Hall Effect and Anomalous Hall Effect in a Two-Dimensional Electron Gas
Creators: name: Schwab, Peter
name: Raimondi, Roberto
name: Gorini, Cosimo
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: 530 Physik

description: We study the coupled dynamics of spin and charge currents in a two-dimensional electron gas in the transport diffusive regime. For systems with inversion symmetry there are established relations between the spin Hall effect, the anomalous Hall effect and the inverse spin Hall effect. However, in two-dimensional electron gases of semiconductors like GaAs, inversion symmetry is broken so that the standard arguments do not apply. We demonstrate that in the presence of a Rashba type of spin-orbit coupling (broken structural inversion symmetry) the anomalous Hall effect, the spin Hall and inverse spin Hall effect are substantially different effects. Furthermore, we discuss the inverse spin Hall effect for a two-dimensional electron gas with Rashba and Dresselhaus spin-orbit coupling; our results agree with a recent experiment.