cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: À la croisée des approches d'enseignement en langues-cultures étrangères : Analyse d'une séquence d'enseignement de l'anglais basée sur des tâches et du contenu interculturel.
title: À la croisée des approches d'enseignement en langues-cultures étrangères : Analyse d'une séquence d'enseignement de l'anglais basée sur des tâches et du contenu interculturel.
titleType: AlternativeTitle
Creators: name: Dieng, Yandé
Publisher: name: Unknown
Year: 0
Subjects: subject: Enseignement de l’anglais
subject: enseignement par des tâches
subject: Content and Language Integrated Learning (CLIL)
subject: approche interculturelle
subject: tâches
subject: contenu

description: Ce mémoire professionnel s’intéresse aux apports de trois approches d’enseignement des langues-cultures étrangères : l’enseignement par des tâches, les approches CLIL et interculturelle. Selon la didactique des langues-cultures étrangères, ces trois formes d’enseignement contribuent à favoriser le développement de la compétence communicative des apprenants. Ce postulat a retenu ma plus grande attention et de là est né le questionnement qui guide ce mémoire « Quels sont les apports d’un enseignement basé sur des tâches et du contenu interculturel ? ». Pour répondre à ma question de recherche, j’ai planifié et testé une séquence d’enseignement originale d’anglais de douze périodes, structurée en une tâche, pour une classe de 10VP. L’objectif général de la séquence étant le suivant : à la fin de la séquence, les élèves seront capables de présenter par oral une recette de cuisine à l’aide d’un support numérique Keynote. La première partie de ce mémoire porte sur le cadre théorique en définissant les trois approches avec un intérêt particulier sur leur finalité commune : la communication. Je me suis également intéressée à la place des tâches et des contenus dans le PER Langues et English in Mind (moyen d’enseignement romand de l’anglais). La deuxième partie consiste en l’explication des choix didactiques de la séquence et la présentation de l’évaluation sommative de la tâche ainsi que leur déroulement. Cette partie inclut aussi le rôle du questionnaire afin d’évaluer la séquence. Finalement, cette partie contient l’analyse de la séquence d’enseignement, reposant sur des critères propres aux trois approches tels que relevés dans le cadre théorique, afin d’apporter des éléments de réponse à mon questionnement de départ. Pour conclure, les observations de la séquence d’enseignement, les présentations orales ainsi que les résultats du questionnaire mettent en exergue la pertinence d’intégrer ces trois approches à l’enseignement d’une langue-culture étrangère. Ces dernières contribuent à la réalisation d’objectifs tant langagiers tels que l’apprentissage de la langue étrangère et le développement de la communication dans un contexte authentique, que non-langagiers comme le développement de la compétence interculturelle, la collaboration entre élèves et la formation à un support numérique. De plus, l’analyse montre que les élèves ont perçu du sens à réaliser la tâche communicative et se sont sentis motivés.
Exploring the Doubly Charged Higgs of the Left-Right Symmetric Model using Vector Boson Fusion-like Events at the LHC
Creators: name: Dutta, Bhaskar
name: Eusebi, Ricardo
name: Gao, Yu
name: Ghosh, Tathagata
name: Kamon, Teruki
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This paper studies the pair production of the doubly charged Higgs boson of the left-right symmetric models using multilepton final state in the vector boson fusion (VBF)-like processes. The study is performed in the framework consistent with the model's correction to the standard model $ρ_{EW}$ parameter. VBF topological cuts, number of leptons in the final state and $p_T$ cuts on the leptons are found to be effective in suppressing the background. Significant mass reach can be achieved for exclusion/discovery of the doubly charge Higgs boson for the upcoming LHC run with a luminosity of $\mathcal{O}(10^3)$ fb$^{-1}$.
description: 13 pages, 8 figures, 2 tables; Version 2:Journal matched version
A nonperturbative method for the scalar field theory
Creators: name: Jora, Renata
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute an all order correction to the scalar mass in the Φ^4 theory using a new method of functional integration adjusted also to the large couplings regime.
description: version published in Physics Letters B
Men Behind the Women at the Woman's Medical School at Northwestern University Medical School
Creators: name: Sims, Ronald H
Publisher: name: Galter Health Science Library & Learning Center
Year: 2019

description: One in a series of Galter Health Sciences Library posters featured as an adjunct to the U.S. National Library of Medicine's traveling exhibit, Changing the face of Medicine - Celebrating America's Women Physicians. [on display at Northwestern University, Feinberg School of Medicine, Lurie Medical Research Building, Chicago, IL from December 9, 2009-January 3, 2010]. The exhibit was organized by the National Library of Medicine and was sponsored by the Galter Health Sciences Library, the Institute for Womens Health Research and the Northwestern Medical Women Faculty Organization. Sponsoring units presented posters during the exhibit demonstrating how women have changed the face of medicine at Northwestern. In addition, a panel of notable Northwestern women discussed their contributions to medicine and health care in the areas of research, education, and clinical care in Hughes Auditorium on December 7, 2009 at 3:00PM. The panel members were: Neena B. Schwartz, PhD, Teresa W. Woodruff, PhD, Erica Marsh, MD, MSCI, and Candace Tingen, BS, BA. A reception followed at 4:30PM.
Seed-packed dielectric barrier device for plasma agriculture: understanding its electrical properties through an equivalent electrical model
Creators: name: DUFOUR, Thierry
name: Judée, Florian
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 510602
subject: Plasma physics; fusion plasmas; electrical discharges

description: Seeds have been packed in a dielectric barrier device where cold atmospheric plasma has been generated to improve their germinative properties. A special attention has been paid on understanding the resulting plasma electrical properties through an equivalent electrical model whose experimental validity has been demonstrated here. In this model, the interelectrode gap is subdivided into 4 types of elementary domains, according to whether they contain electric charges (or not) and according to their type of medium (gas, seed or insulator). The model enables to study the influence of seeds on the plasma electrical properties by measuring and deducing several parameters (charge per filament, gas capacitance, plasma power, …) either in no-bed configuration (i.e. no seed in the reactor) or in packed-bed configuration (seeds in the reactor). In that second case, we have investigated how seeds can influence the plasma electrical parameters considering six specimens of seeds (beans, radishes, corianders, lentils, sunflowers and corns). The influence of molecular oxygen (0-100 sccm) mixed with a continuous flow rate of helium (2 slm) is also investigated, especially through filaments breakdown voltages, charge per filament and plasma power. It is demonstrated that such bed-packing drives to an increase in the gas capacitance (ξOFF), to a decrease in the β– parameter and to variations of the filaments' breakdown voltages in a seed-dependent manner. Finally, we show how the equivalent electrical model can be used to assess the total volume of the contact points, the capacitance of the seeds in the packed-bed configuration and we demonstrate that germinative effects can be induced by plasma on four of the six agronomical specimens.
Role of Spin Momentum Current in Magnetic Non-Local Damping of Ultrathin Film Structures
Creators: name: Woltersdorf, Georg
name: Urban, R.
name: Heinrich, B.
Publisher: name: Universität Regensburg
Year: 2002
Subjects: subject: 530 Physik

description: Non-local damping was investigated by Ferromagnetic Resonance (FMR) using ultrathin magnetic single and double layer structures prepared by Molecular Beam Epitaxy (MBE). The double layer structures show magnetic damping which is caused by spin transport across a normal metal spacer (N). In double layer structures a thin Fe layer, F1, was separated from a thick Fe layer, F2, by a Au(001) spacer. The interface magnetic anisotropies separated the FMR fields of F1 and F2 by a big margin allowing one to investigate FMR in F1 while F2 had a negligible angle of precession, and vice versa. The Fe films in magnetic double layers acquire non-local interface Gilbert damping. It will be shown that the precessing magnetic moments act as spin pumps and spin sinks. This concept was tested by investigating the FMR linewidth around an accidental crossover of the resonance fields for the layers F1 and F2. There is another possible mechanism for non-local damping which is based on a "breathing Fermi surface" of the spacer. The temperature dependence of the non-local damping indicates that this mechanism is weak in Au spacers. Surprisingly the Au spacer acts as an additional impedance for the spin pump mechanism. Finally, it will be shown that electron-electron correlations in a Pd spacer can lead to a significant enhancement of the non-local damping.
O APRENDER FAZENDO: RESSIGNIFICANDO AS PRÁTICAS DOCENTES POR MEIO DO ESTÁGIO EM LÍNGUA PORTUGUESA
Creators: name: Giovanna Tainara da Silva
name: Lílian Noemia Torres de Melo Guimarães
Publisher: name: Zenodo
Year: 2023

description: Resumo: Este relato apresenta reflexões sobre a importância do Estágio Supervisionado Obrigatório (ESO) para a formação docente. As práticas de observação e regência foram realizadas em duas turmas de 6º ano de uma escola pública em Serra Talhada, estado de Pernambuco. A descrição destas atividades detalha os métodos empregados pela professora supervisora em suas aulas, e, a partir deste estudo, a elaboração de materiais didáticos e planos de aula a serem executados no período de regência. A base teórica deste trabalho fundamenta-se na metodologia do Learning by doing, de John Dewey (1959), em que o processo de aprender fazendo é superestimado na realização das atividades propostas, como leitura e análise linguística da fábula O Pequeno Príncipe de Antoine de Saint-Exupéry (1987), além de produções textuais baseadas na obra citada. No decorrer do relato, apresentamos todos os prós e contras dessa prática, e, sobretudo, os aprendizados extraídos dessa experiência.
Integrable hydrodynamic equations for initial chiral currents and infinite hydrodynamic chains from WZNW model and string model of WZNW type with $SU(2),$ $SO(3),$ $SP(2),$ $SU(\infty)$, $SO(\infty)$, $SP(\infty)$ constant torsions
Creators: name: Cirilo-Lombardo, D. J.
name: Gershun, V. D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The WZNW and string models are considered in the terms of the initial and invariant chiral currents assuming that the internal and external torsions coincide (anticoincide) and they are the structure constants of the $SU(n),SO(n),$ $SP(n)$ Lie algebras. These models are the auxiliary problems in order to construct integrable equations of hydrodynamic type. It was shown that the WZNW and string models in terms of invariant chiral currents are integrable for the constant torsion associated with the structure constants of the $SU(2),$ $SO(3),$ $SP(2)$ and $SU(3)$ algebras only. The equation of motion for the density of the first Casimir operator was obtained in the form of the inviscid Burgers equation. The solution of this equation is presented through the Lambert function. Also, a new equation of motion for the initial chiral current was found. The integrable infinite hydrodynamic chains obtained from the WZNW and string models are given in terms of invariant chiral currents with the $SU(2)$, $SO(3)$, $SP(2)$ and with $SU(\infty)$, $SO(\infty)$, $SP(\infty)$ constant torsions. Also, the equations of motion for the density of any Casimir operator and new infinite dimensional equations of hydrodynamic type for the initial chiral currents through the symmetric structure constant of $SU(\infty)$, $SO(\infty),$ $SP(\infty)$ algebras are obtained.
description: Published in the International Journal of Modern Physics A Vol. 29, No. 24 (2014) 1450134 (30 pages), DOI:10.1142/S0217751X14501346. 35 pages, abstract updated, 2 figures, corrected version with references updated. Replacement 2. arXiv admin note: substantial text overlap with arXiv:1312.4013
Role of spin current in magnetic relaxations of metallic multilayer films
Creators: name: Heinrich, B.
name: Woltersdorf, Georg
name: Urban, R.
name: Simanek, E.
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik

description: In our recent studies the relaxation processes were investigated by ferromagnetic resonance (FMR) using magnetic single, Au/Fe/GaAS(0 0 1), and double layer, Au/Fe/Au/Fe/GaAS(0 0 1), structures prepared by molecular beam epitaxy (MBE). Single and double layer structures were grown on (4 x 6) reconstructed GaAS(00 1) templates. The samples have high crystalline quality with the magnetic properties corresponding to bulk Fe, only modified by interface anisotropies. The magnetic relaxation in these structures is well described by Gilbert damping with no extrinsic contributions to the FMR line width. These structures provide an excellent opportunity to investigate non-local damping which is caused by spin transport across a non-magnetic spacer. In the double layer structures thin Fe layers were separated from a second thick Fe layer of 40 monolayer (M L) thickness by a 40 ML thick Au(001) spacer. The main result of these studies is that the ultrathin Fe films in magnetic double layers acquire an additional Gilbert damping. The additional FMR line width followed an inverse dependence on the Fe film thickness which is expected for interface damping. The spin pump model will be discussed and it will be shown that it is closely related to the dynamic part of interlayer exchange coupling. (C) 2002 Elsevier Science B.V. All rights reserved.
TEORIA VAI, PRÁTICA VEM: O ENSINO DE ORALIDADE PARA A FORMAÇÃO DE PROFESSORES
Creators: name: Renilson Nóbrega Gomes
Publisher: name: Zenodo
Year: 2023

description: Resumo: Neste relato de prática, discuto sobre formação inicial do professor de Língua Portuguesa mediante um processo didático-pedagógico que primou pela aliança entre teoria e prática, demonstrando como o ensino acadêmico poderá se efetivar compenetrado no que se realiza em sala de aula. Para tanto, sustento-me numa discussão teórica e um objeto de ensino de livro didático proposto para ser escolarizado no ensino médio, articulando conceitos teóricos à escola com a prática desse objeto (entrevista) propagada como temática de estudo na universidade. Nesse contexto, objetivo descrever práticas no ensino superior com foco no entrelaçamento teórico e prático, entre o que se discute na universidade e o que se realiza pedagogicamente na escola, pontuando possibilidades de aproximação entre as duas esferas. Teoricamente, filio-me aos conceitos teóricos sobre formação docente e ensino de oralidade, com destaque para o gênero entrevista. Quanto à metodologia, é uma pesquisa qualitativa com influência documental e interpretativa, em cuja geração de dados, utilizei um artigo científico, um capítulo de livro e uma proposta de produção de texto de livro didático. Como resultado, posso apontar que a relação de saberes teóricos com saberes práticos em contexto de formação de professor de Língua Portuguesa pode ocorrer, estabelecendo, por fim, um diálogo entre o que se discute academicamente com o que se faz escolarmente. Com essa percepção, é possível depreender que a teoria pode contribuir com uma prática mais elaborada no que toca à definição do objeto e das estratégias com foco no conteúdo a ser ensinado.
title: Ανάπτυξη ενός σύγχρονου μοντέλου αξιολόγησης μαθησιακών αντικειμένων
title: Development of a modern learning objects evaluation model
titleType: AlternativeTitle
Creators: name: Φλωράκη, Μαρία
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2022
Subjects: εξ αποστάσεως εκπαίδευση
πολυμεσική θεωρία
μαθησιακά αντικείμενα
μοντέλα μαθησιακού σχεδιασμού
μοντέλα αξιολόγησης μαθησιακών αντικειμένων
φωτόδεντρο

description: Τα τελευταία χρόνια τα εκπαιδευτικά συστήματα πολυμέσων υπόσχονται να κάνουν τη μάθηση πιο ενδιαφέρουσα, εμπλουτίζοντας την παραδοσιακή διδασκαλία με ψηφιακό εκπαιδευτικό υλικό για να αυξηθεί το ενδιαφέρον των μαθητών. Πιο συγκεκριμένα, οι καταστάσεις που βιώνουμε εν έτη 2022, λόγω της πανδημίας COVID-19, ανέδειξαν την ανάγκη προώθησης ενός εκπαιδευτικού περιεχόμενου για μάθηση από απόσταση. Με την ένταξη των υπολογιστών στην εκπαίδευση, έχουν διεξαχθεί ένα πλήθος μελετών και ερευνών προκειμένου, η επιστημονική κοινότητα, να ανακαλύψει το σωστό τρόπο ενσωμάτωσης τους στην εκπαιδευτική διαδικασία, ώστε οι εκπαιδευόμενοι να επωφεληθούν από τις δυνατότητες τους. Σκοπός της παρούσας εργασίας είναι να σχεδιαστεί ένα μοντέλο αξιολόγησης Μαθησιακών Αντικειμένων με βάση τις καλές πρακτικές της πολυμεσικής θεωρίας, και όχι μόνο. Ο λόγος δημιουργίας αυτού του μοντέλου έγινε για να αναδειχθεί η πληρότητα των χαρακτηριστικών και της ποιότητας των Μαθησιακών Αντικειμένων, όπως αυτή παρουσιάζεται μέσα από βασικές παιδαγωγικές προσεγγίσεις. Στη συνέχεια δημιουργούνται τέσσερα διαφορετικά μαθησιακά αντικείμενα που πληρούν τα κριτήρια του προτεινόμενου μοντέλου αξιολόγησης. Επίσης, μέσα από την μελέτη των ήδη υπαρχόντων μαθησιακών αντικειμένων στο αποθετήριο «Φωτόδεντρο» και των σύγχρονων θεωριών μάθησης, αναδείχθηκαν οι καλές πρακτικές της πολυμεσικής θεωρίας και του μοντέλου αξιολόγησης που αναπτύχθηκε. Τέλος, μέσα από τη συγκεκριμένη μελέτη ερευνήθηκε κατά πόσο τα 25 μαθησιακά αντικείμενα που επιλέχθηκαν από το «Φωτόδεντρο» χαρακτηρίζονται από ποιότητα περιεχομένου, ευθυγράμμιση με τους μαθησιακούς στόχους, ανατροφοδότηση και προσαρμογή, κίνητρα, σχεδιασμό παρουσίασης, ευχρηστία αλληλεπίδρασης, επαναχρησιμοποίηση, προσβασιμότητα και συμμόρφωση με τα πρότυπα του μοντέλου αξιολόγησης που δημιουργήθηκε.
Robust quantum metrological schemes based on protection of quantum Fisher information
Creators: name: Lu, Xiao-Ming
name: Yu, Sixia
name: Oh, C. H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Fragile quantum features such as entanglement are employed to improve the precision of parameter estimation and as a consequence the quantum gain becomes vulnerable to noise. As an established tool to subdue noise, quantum error correction is unfortunately overprotective because the quantum enhancement can still be achieved even if the states are irrecoverably affected, provided that the quantum Fisher information, which sets the ultimate limit to the precision of metrological schemes, is preserved and attained. Here, we develop a theory of robust metrological schemes that preserve the quantum Fisher information instead of the quantum states themselves against noise. After deriving a minimal set of testable conditions on this kind of robustness, we construct a family of $2t+1$ qubits metrological schemes being immune to $t$-qubit errors after the signal sensing. In comparison at least five qubits are required for correcting arbitrary 1-qubit errors in standard quantum error correction.
description: 12 pages, 4 figures
Hidden Q-structure and Lie 3-algebra for non-abelian superconformal models in six dimensions
Creators: name: Lavau, Sylvain
name: Samtleben, Henning
name: Strobl, Thomas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We disclose the mathematical structure underlying the gauge field sector of the recently constructed non-abelian superconformal models in six spacetime dimensions. This is a coupled system of 1-form, 2-form, and 3-form gauge fields. We show that the algebraic consistency constraints governing this system permit to define a Lie 3-algebra, generalizing the structural Lie algebra of a standard Yang-Mills theory to the setting of a higher bundle. Reformulating the Lie 3-algebra in terms of a nilpotent degree 1 BRST-type operator Q, this higher bundle can be compactly described by means of a Q-bundle; its fiber is the shifted tangent of the Q-manifold corresponding to the Lie 3-algebra and its base the odd tangent bundle of spacetime equipped with the de Rham differential. The generalized Bianchi identities can then be retrieved concisely from Q^2=0, which encode all the essence of the structural identities. Gauge transformations are identified as vertical inner automorphisms of such a bundle, their algebra being determined from a Q-derived bracket.
description: 51 pages, 3 figures
Generating scale-invariant tensor perturbations in the non-inflationary universe
Creators: name: Li, Mingzhe
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is believed that the recent detection of large tensor perturbations strongly favors the inflation scenario in the early universe. This common sense depends on the assumption that Einstein's general relativity is valid at the early universe. In this paper we show that nearly scale-invariant primordial tensor perturbations can be generated during a contracting phase before the radiation dominated epoch if the theory of gravity is modified by the scalar-tensor theory at that time. The scale-invariance protects the tensor perturbations from suppressing at large scales and they may have significant amplitudes to fit BICEP2's result. We construct a model to achieve this purpose and show that the universe can bounce to the hot big bang after long time contraction, and at almost the same time the theory of gravity approaches to general relativity through stabilizing the scalar field. Theoretically, such models are dual to inflation models if we change to the frame in which the theory of gravity is general relativity. Dual models are related by the conformal transformations. With this study we reinforce the point that only the conformal invariant quantities such as the scalar and tensor perturbations are physical. How did the background evolve before the radiation time depends on the frame and has no physical meaning. It is impossible to distinguish different pictures by later time cosmological probes.
description: 7 pages, 4 figures. An error in the numerical results and some typos in the text were corrected, but general conclusions are unchanged
Row-Based Dual Vdd Assignment, for a Level Converter Free CSA Design and Its Near-Threshold Operation
Creators: name: Saha, Dipankar
name: Chatterjee, Aanan
name: Chatterjee, Sayan
name: Sarkar, C. K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: Subthreshold circuit designs are very much popular for some of the ultra low power applications, where the minimum energy consumption is the primary concern. But, due to the weak driving current, these circuits generally suffer from huge performance degradation. Therefore, in this paper, we primarily targeted to analyze the performance of a Near-Threshold Circuit (NTC), which retains the excellent energy efficiency of the subthreshold design, while improving the performance to a certain extent. A modified row-based dual Vdd 4-operand CSA (Carry Save Adder) design has been reported in the present work using 45 nm technology. Moreover, to find out the effectiveness of the near-threshold operation of the 4-operand CSA design; it has been compared with the other design styles. From the simulation results, obtained for the frequency of 20 MHz, we found that the proposed scheme of CSA design consumes 3.009*10-7 Watt of Average Power (Pavg), which is almost 90.9 % lesser than that of the conventional CSA design. Whereas, looking at the perspective of maximum delay at output, the proposed scheme of CSA design provides a fair 44.37 % improvement, compared to that of the subthreshold CSA design.
description: Final Version of this work is available @ Advances in Electrical Engineering, Hindawi Publishing Corporation (Volume 2014 (2014), Article ID 814975, 6 pages)
Activity 4 Handout
Creators: name: Gutzman, Karen E
name: Kubilius, Ramune Karolina
name: Pastva, Joelen
Publisher: name: Galter Health Science Library & Learning Center
Year: 2017

description: The Liaison Librarian DigitalHub In-Service was held at Galter Library in the Learning Resources Center (Classroom 1-413) on Monday, July 24, 2017 from 1:00 - 3:30 pm. The purpose of the event was to increase the liaison librarians' familiarity with DigitalHub contents, explore alternative outputs at Northwestern, help the liaison librarians better understand the institutional repository environment, and increase the liaison librarians' capacity to answer or anticipate questions from users related to DigitalHub.
Fluctuations and diffusion in sheared athermal suspensions of deformable particles
Creators: name: Gross, Markus
name: Krüger, Timm
name: Varnik, Fathollah
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We analyze fluctuations of particle displacements and stresses in a sheared athermal suspension of elastic capsules (red blood cells). Upon variation of the volume fraction from the dilute up to the highly concentrated regime, our numerical simulations reveal different characteristic power-law regimes of the fluctuation variances and relaxation times. In the jammed phase and at high shear rates, anomalous scaling exponents are found that deviate from pure dimensional predictions. The observed behavior is rationalized via kinetic arguments and a dissipation balance model that takes into account the local fluid flows between the particles. Our findings support the view that the rheology of dense suspensions is essentially governed by the non-affine displacements.
description: 6 pages, 6 figures
title: Electron beam lithography and induced deposition for nanoplasmonic applications
Creators: name: Heyerick, Aline
Publisher: name: University of St Andrews
Year: 2018

description: Nanoplasmonics concerns the study of light-metal interactions on a subwavelength scale, exhibiting behaviour able to achieve arbitrary control and manipulation of light at the nanoscale, an important goal for the further development of nanophotonic devices. As the field of plasmonics advances, research is looking beyond the materials and fabrication techniques traditionally employed. This thesis discusses the design, fabrication methods, and characterisation of nanoplasmonic structures. A comparison between two electron beam based fabrication techniques, electron beam lithography (EBL) and electron beam induced deposition (EBID), is presented. The discussion covers both the fabrication technology and the properties of the resulting nanoscale structures: gold nanoscale features obtained via standard EBL, and tungsten structures achieved through EBID. As a mature technology, the well-understood characteristics and reliable fabrication procedures of electron beam lithography are weighed up against the limitations of top-down planar fabrication. Electron beam induced deposition is presented as an alternative technology, able to achieve nanoscale fabrication resolution with a point-and-shoot bottom-up deposition technique, but constrained by the lack of optimised fabrication settings as a result of incomplete understanding of a complex set of patterning parameters. Direct-write EBID technology offers to overcome several of the limitations and challenges of electron beam technology, including three-dimensional and greyscale patterning, and precise alignment and orientation of nanoscale features on arbitrary substrate patterns. This thesis also presents the discussion of chirped plasmonic diffraction gratings as a specific application in nanoplasmonics. Their theoretical design based on Fourier analysis and simulation-based design, their fabrication using both electron beam lithography and induced deposition, as well as the characterisation of their far-field diffraction pattern are discussed in detail. As part of the characterisation step, a Fourier microscopy setup for the measurement of the far-field diffraction patterns of nanophotonic structures in both reflection and transmission was constructed.
Magnetic relaxations in metallic multilayers
Creators: name: Heinrich, B.
name: Urban, R.
name: Woltersdorf, Georg
Publisher: name: Universität Regensburg
Year: 2002
Subjects: subject: 530 Physik

description: The intrinsic damping mechanism in metals caused by incoherent scattering of itinerant electron-hole pair excitations by phonons and magnons will be reviewed. The unique features of magnetic relaxations in multilayers were studied by ferromagnetic resonance (FMR) using magnetic single, Au-Fe-GaAs(001), and double layer Au-Fe-Au-Fe-GaAs(001) structures prepared by molecular beam epitaxy. The magnetic relaxation in single-layer films is described by the Gilbert damping with no extrinsic contributions to the FMR linewidth. These films provided an excellent opportunity to investigate nonlocal damping. The main result of these studies is that ultrathin Fe films in magnetic double layers acquire an additional interface Gilbert damping. This is in agreement with recent predictions of nonlocal interface damping which Is based on the transport of spin angular momentum between the ferromagnetic layers. Measurements of the nonlocal Gilbert damping offer a possibility to carry out quantitative studies of the relaxation torques caused by nonlocal spin momentum transfer. Numerical simulations of magnetization reversal and stationary precession for an applied perpendicular current in Au-Fe-Au-Fe-GaAs(001) multilayers will be shown.
ظاهرة الطلاق بين إكراهات الواقع والممارسة القضائية
Creators: name: محمد مومن, مومن
name: محمد محروك
Publisher: name: Zenodo
Year: 2023

description: ظاهرة الطلاق بين إكراهات الواقع والممارسة القضائية
A new kinetic model for precipitation from solid solutions
Creators: name: Borysenko, O.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: This model considers reversible elementary acts of migration of point defects (interstitials and/or vacancies) across the precipitate-matrix interface and enables one to derive equations for the rates of emission and absorption of solute atoms at the interface. The model predicts much stronger heterophase fluctuations and higher nucleation rates than the classical nucleation theory does. However, asymptotically, for large precipitate sizes and long ageing times, both models give the same results, being in agreement with the Lifshitz-Slyozov-Wagner theory of coarsening.
description: 8 pages, 3 figures
Modal spectrum of permalloy disks excited by in-plane magnetic fields
Creators: name: Neudecker, Ingo
name: Perzlmaier, Korbinian
name: Hoffmann, Frank
name: Woltersdorf, Georg
name: Buess, Matthias
name: Weiss, Dieter
name: Back, Christian
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: 530 Physik

description: The mode spectrum of 4 micron sized ferromagnetic permalloy disks exhibiting a vortex structure in equilibrium is investigated in detail. Normal modes accessible by in-plane field excitations are examined. By means of spatially resolved techniques using Kerr microscopy we recorded the modal structure of the disks at zero bias field. We employed pulsed and continuous wave excitation. As a result we report on normal modes up to the fifth order. Using inductive and spatially resolved resonance measurements the evolution of the mode spectrum as a function of an external magnetic field was investigated. Quantized modes in longitudinal as well as in transverse direction in the uniform magnetized disks were observed. Good agreement between the experimental results and those from micromagnetic simulations was found.
Integrable systems from the classical reflection equation
Creators: name: Schrader, Gus
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We construct integrable Hamiltonian systems on $G/K$, where $G$ is a quasitriangular Poisson Lie group and $K$ is a Lie subgroup arising as the fixed point set of a group automorphism $σ$ of $G$ satisfying the classical reflection equation. In the case that $G$ is factorizable, we show that the time evolution of these systems is described by a Lax equation, and present its solution in terms of a factorization problem in $G$. Our construction is closely related to the semiclassical limit of Sklyanin's integrable quantum spin chains with reflecting boundaries.
description: 23 pages, published version
Two-magnon scattering in a self-assembled nanoscale network of misfit dislocations
Creators: name: Woltersdorf, Georg
name: Heinrich, B.
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: 530 Physik

description: The static and dynamic properties of magnetic Pd/Fe(001) ultrathin film crystalline structures prepared on GaAs(001) templates were investigated by ferromagnetic resonance (FMR) from 10 to 73 GHz. It will be shown that the formation of a self-assembled nanoscale network of misfit dislocations in crystalline structures can be detected during the growth by fan-out diffraction features in reflection high electron energy diffraction. This network of defects leads to a strong extrinsic magnetic damping. The out-of-plane measurements of the FMR linewidth have revealed that the extrinsic damping is caused by two-magnon scattering. The contribution to the FMR linewidth from two-magnon scattering is strongly anisotropic and follows the rectangular symmetry of the glide planes of the misfit dislocation network. It will be shown that the observed strong anisotropy in two-magnon scattering can be interpreted by Fourier components of magnetic defects. The angular dependence of the Fourier components results in an effective channelling of scattered spin waves.
title: Synthese und Evaluierung neuer bifunktioneller Antioxidantien zur thermo-oxidativen Langzeit-Stabilisierung von Polypropylen
Creators: name: Fischer, Johannes
Publisher: name: UNSPECIFIED
Year: 2020

description: Im Rahmen der Arbeit wurde ein leistungsfähiges und ressourcenschonendes Syntheseverfahren zur Synthese komplexer, bifunktioneller und hochmolekularer Antioxidantien für die thermo-oxidative Langzeitbeständigkeit von Polypropylen entwickelt. Das neue Verfahren orientiert sich an den Grundzügen von Green Chemistry und ist in der Lage, ökonomisch und ökologisch veraltete Synthesewege abzulösen. Über das entwickelte Reaktionsverfahren wurde eine neue Gruppe zeitgemäßer Antioxidantien synthetisiert. Untersuchungen der Molekül-Eigenschaftsbeziehungen zeigen dabei ein wegweisendes Molekül-Design auf. Die neuen Verbindungen ermöglichen eine erweiterte thermo-oxidative Beständigkeit von Polypropylen gegenüber einem kommerziellen Standard.
Direct observation of the vortex core magnetization and its dynamics
Creators: name: Chou, K. W.
name: Puzic, A.
name: Stoll, H.
name: Dolgos, D.
name: Schuetz, G.
name: Van Waeyenberge, B.
name: Vansteenkiste, A.
name: Tyliszczak, T.
name: Woltersdorf, Georg
name: Back, Christian
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: 530 Physik

description: Square-shaped thin film structures with a single magnetic vortex were investigated using a scanning transmission x-ray microscope. The authors report on the direct observation of the vortex core in 500x500 nm(2), 40 nm thick soft magnetic Ni-Fe samples. The static configuration of the vortex core was imaged as well as the gyrotropic motion of the core under excitation with an in-plane alternating magnetic field. This enabled them to directly visualize the direction of the out-of-plane magnetization in the vortex core (up or down). The reversal of the core was effected by short bursts of an alternating magnetic field. An asymmetry appears in the core's trajectory for its orientation pointing up and down, respectively.
Observation of the propagation and interference of spin waves in ferromagnetic thin films
Creators: name: Perzlmaier, Korbinian
name: Woltersdorf, Georg
name: Back, Christian H.
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik

description: We have observed the propagation of spin waves and spin-wave packets in 20-nm-thick Permalloy films upon microwave excitation by means of time-resolved scanning Kerr microscopy. Spin waves can be detected up to 80 mu m away from the driving coplanar strip line. In doing so, we were able to directly determine the phase velocities, dispersion relations and group velocities for different geometries of an externally applied in-plane magnetic field. In addition, we report on the direct optical observation of spin-wave interference with lateral and time (phase) resolution.
title: Poland Report. Sustainable Governance Indicators 2022
Creators: name: Matthes, Claudia-Yvette
name: Markowski, Radoslaw
name: Bönker, Frank
Publisher: name: Bertelsmann Stiftung
Year: 2022
Subjects: Governance
Democracy
Regierungshandeln
Demokratie

description: Poland has been governed by the right-wing populist PiS since 2015. In 2020, PiS reaffirmed its hold on power through Andrzej Duda’s re-election as president of the republic in June. However, this was a narrow victory with Duda winning only 420,000 more votes (in a country of more than 30 million eligible voters) than Rafał Trzaskowski, the mayor of Warsaw.
An invariance principle to Ferrari-Spohn diffusions
Creators: name: Ioffe, Dmitry
name: Shlosman, Senya
name: Velenik, Yvan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove an invariance principle for a class of tilted (1+1)-dimensional SOS models or, equivalently, for a class of tilted random walk bridges in Z_+. The limiting objects are stationary reversible ergodic diffusions with drifts given by the logarithmic derivatives of the ground states of associated singular Sturm-Liouville operators. In the case of a linear area tilt, we recover the Ferrari-Spohn diffusion with log-Airy drift, which was derived by Ferrari and Spohn in the context of Brownian motions conditioned to stay above circular and parabolic barriers.
description: Final version to appear in Communications in Mathematical Physics (includes minor updates done at proofreading stage)
Sustainable improvement of seeds vigor using dry atmospheric plasma priming: evidence through coating wettability, water uptake and plasma reactive chemistry
Creators: name: DUFOUR, Thierry
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 300607
subject: Food technology

description: Lentil seeds have been packed in a dielectric barrier device and exposed for several minutes to a cold atmospheric plasma generated in helium with/without a reactive gas (nitrogen or oxygen). While no impact is evidenced on germination rates (caping nearly at 100% with/without plasma exposure), seeds vigor is clearly improved with a median germination time decreasing from 1850 min (31h) to 1500 min (26 h), hence representing a time saving of at least 5 hours. We show that the admixture of nitrogen to helium can further increase this time saving up to 8 hours. Contrarily, we demonstrate that the addition of molecular oxygen to the helium discharge does not promote seeds vigor. Whatever the plasma chemistry utilized, these biological effects are accompanied with strong hydrophilization of the seed coating (with a decrease in contact angles from 118° to 25°) as well as increased water absorption (water uptakes measured 8 hours after imbibition are close to 50% for plasma-treated seeds instead of 37% for seeds from the control group). A follow-up of the seeds over a 45-days ageing period shows the sustainability of the plasma-triggered biological effects: whatever the plasma treatment, seeds vigor remains stable and much higher than for seeds unexposed to plasma). For these reasons, the seed-packed dielectric barrier device (SP-DBD) supplied with a He-N2 gas mixture can be considered as a relevant dry atmospheric priming plasma (DAPP) in the same way as those used in routine by seed companies.
The K-homology of nets of C*-algebras
Creators: name: Ruzzi, Giuseppe
name: Vasselli, Ezio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Operator Algebras (math.OA)
subject: Mathematical Physics (math-ph)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Let X be a space, intended as a possibly curved spacetime, and A a precosheaf of C*-algebras on X. Motivated by algebraic quantum field theory, we study the Kasparov and Theta-summable K-homology of A interpreting them in terms of the holonomy equivariant K-homology of the associated C*-dynamical system. This yields a characteristic class for K-homology cycles of A with values in the odd cohomology of X, that we interpret as a generalized statistical dimension.
description: To appear in Journal of Geometry and Physics
Surface treatments and magnetic properties of Ga1-xMnxAs thin films
Creators: name: Maccherozzi, F.
name: Panaccione, G.
name: Rossi, G.
name: Hochstrasser, M.
name: Sperl, M.
name: Reinwald, M.
name: Woltersdorf, Georg
name: Wegscheider, Werner
name: Back, Christian
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: 530 Physik

description: As a diluted magnetic semiconductor (DMS), (Ga,Mn)As is a possible candidate for the realization of spintronics devices, due to its intrinsic compatibility with GaAs based electronics. The low Curie temperature still limits its use for practical devices. Despite the huge knowledge on GaAs surface, the (Ga,Mn)As surface is still not well understood and difficult to handle. Standard surface cleaning techniques have many drawbacks, mainly because thermal treatments changes crystal structure. We will compare the magnetic and spectroscopic properties of differently processed (Ga,Mn)As surfaces with X-ray photoemission (XPS), X-ray absorption (XAS) and X-ray magnetic circular dichroism (XMCD). Samples as-grown, chemically etched, Ar+ sputtered and annealed in oxygen will be compared.
Preparation, Optimization and Characteristics of pharmaceutical Grade Corn Starch from local corn Using Acetylated Method
Creators: name: Ameha Mikre
Publisher: name: Zenodo
Year: 2015

description: Corn starch was extracted from local corn (Melkasa-2) obtained from Melkasa Agricultural Research Center. And this extracted corn starch synthesized by the reaction of corn starch with acetic anhydride in the presence of acetic acid under varying reaction temperature and time. The result was with different value of degree of substitution (minimum DS= 0.26 and maximum DS=2.38) and different value acetyl percent (minimum Ac=6.45 and maximum Ac=43.29). The effects of temperature and time on acetylated modified corn starch were that as time and temperature increase the acetyl percentage and degree of substitute also increase. The Infrared spectrophotometer was demonstrated that the spectra of acetylated modified corn starch and the standard corn starch (commercially available pharmaceutical grade) had similar chromatogram or finger print. The swelling power and solubility of acetylated modified corn starch was higher than that of native starch. The moisture content (5.78%) was also in the range of commercially available(NMT 15%) and also other physicochemical property like sulphated ash (0.198%), bulk density of normal (0.725) and acetylated modified (0.726) corn starch was not significant, and also the water binding capacity (WBC) g/g of native starch is higher than of acetylated modified corn starches. All the above chemical and physicochemical property of acetylated modified corn starch parameter fulfilled the criteria of commercially available pharmaceutical grade starch. From the above result it is conclude that its possible to prepare pharmaceutical acetylated corn starch.
Data and R code: Effects of Coumaphos on Locomotor Activities of Different Honeybee (Apis mellifera L.) Subspecies and Ecotypes
Creators: name: Arslan, Okan Can
name: Erdem, Babür
name: Somel, Mehmet
name: Giray, Tuğrul
name: Kence, Meral
Publisher: name: Zenodo
Year: 2023
Subjects: Honey Bee (Apis mellifera), Varroa destructor, Coumaphos, Learning, Acaricides, Acetylcholinesterase (AChE).

description: The effects of acute sublethal doses of coumaphos, an acaricide used against Varroa destructor infestation in beekeeping, on the locomotor activities of three native honeybee subspecies of Turkey (Carniolan honeybee -A. m. carnica, Syrian honeybee -A. m. syriaca, Caucasian honeybee- A. m. caucasica) and two ecotypes (Muğla and Yığılca ecotypes of Anatolian honeybee A. m. anatoliaca) were investigated using an individual locomotor activity monitoring system. Analysis of locomotor activity data in first-12 hour, last 12-hour and 24- hour time periods showed that bees from caucasica and carnica subspecies were unresponsive to the acute effects of coumaphos on locomotor activity at all three acute coumaphos doses (1, 2, and 5µg. coumaphos in 10 µl. sucrose syrup for each bee). In contrast, bees from A. m. syriaca subspecies showed significantly elevated locomotor activity levels at 2 and 5 ug coumaphos doses within the first 12 hours. Bees from both Muğla and Yığılca ecotypes of anatoliaca subspecies also showed elevated locomotor activity levels at 5 ug coumaphos dose but the magnitude of increase was lower in these ecotypes compared to that seen in syriaca subspecies in the first 12-hour period. In general, increasing doses of coumaphos resulted in increased locomotor activity (locomotor activity), with differences in sensitivity across honeybee populations. In general, increasing doses of coumaphos resulted in increased locomotor activity, with differences in sensitivity across honey bee populations. Possible mechanisms underlying this variance and suggestions for further studies are discussed.