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Université de Fribourg

Effective equilibrium states in mixtures of active particles driven by colored noise

Wittmann, René ; Brader, Joseph M. ; Sharma, Abhinav ; Marconi, U. Marini Bettolo

In: Physical Review E, 2018, vol. 97, no. 1, p. 012601

We consider the steady-state behavior of pairs of active particles having different persistence times and diffusivities. To this purpose we employ the active Ornstein- Uhlenbeck model, where the particles are driven by colored noises with exponential correlation functions whose intensities and correlation times vary from species to species. By extending Fox's theory to many components, we...

Université de Fribourg

Effective equilibrium states in the colored-noise model for active matter II. A unified framework for phase equilibria, structure and mechanical properties

Wittmann, René ; Marconi, Umberto Marini Bettolo ; Maggi, C ; Brader, Joseph M.

In: Journal of Statistical Mechanics: Theory and Experiment, 2017, vol. 2017, no. 11, p. 113208

Active particles driven by colored noise can be approximately mapped onto a system that obeys detailed balance. The effective interactions which can be derived for such a system allow the description of the structure and phase behavior of the active fluid by means of an effective free energy. In this paper we explain why the related thermodynamic results for pressure and interfacial tension...

Université de Fribourg

Pressure, surface tension, and curvature in active systems: A touch of equilibrium

Wittmann, René ; Smallenburg, Frank ; Brader, Joseph M.

In: The Journal of Chemical Physics, 2019, vol. 150, no. 17, p. 174908

We explore the pressure of active particles on curved surfaces and its relation to other interfacial properties. We use both direct simulations of the active systems as well as simulations of an equilibrium system with effective (pair) interactions designed to capture the effects of activity. Comparing the active and effective passive systems in terms of their bulk pressure, we elaborate that...

Haute Ecole de Santé de Fribourg

L’infirmière : l’évolution de l’image de la discipline infirmière

Wittwer-Corelli, Claudia ; Nadot, Michel (Dir.)

Mémoire de bachelor : Haute Ecole de Santé de Fribourg, 2009.

Ce travail porte sur l’évolution de l’image de la discipline infirmière. Dans un premier temps, l’auteur de cette étude a recherché la littérature correspondant à ce thème. Il a été choisi qu’en introduction le cheminement de l’auteur vers la problématique soit expliqué afin de montrer la pertinence et l’intérêt du questionnement de recherche. Afin de répondre à la...

Université de Fribourg

Lack of parvalbumin in mice leads to behavioral deficits relevant to all human autism core symptoms and related neural morphofunctional abnormalities

Wöhr, M. ; Orduz, D. ; Gregory, Patrick ; Moreno, H ; Khan, U. ; Vörckel, K. J. ; Wolfer, D. P. ; Welzl, H. ; Gall, D. ; Schiffmann, S. N. ; Schwaller, Beat

In: Translational Psychiatry, 2015, vol. 5, no. 3, p. e525

Gene mutations and gene copy number variants are associated with autism spectrum disorders (ASDs). Affected gene products are often part of signaling networks implicated in synapse formation and/or function leading to alterations in the excitation/inhibition (E/I) balance. Although the network of parvalbumin (PV)-expressing interneurons has gained particular attention in ASD, little is known on...

Université de Fribourg

Shift Work and Work-Family Conflict : A Systematic Review

Wöhrmann, Anne Marit ; Müller, Grit ; Ewert, Kathrin

In: sozialpolitik.ch, 2020, vol. 3, no. 2, p. Article: 3.2

Shift work occupies precious time for family and social life. The aim of this review was to systematically assess the state of research on the impact of shift work on work-fam-ily conflict. A systematic literature search was conducted in PubMed and EBSCO to identify studies published between 1990 and 2017. In the end, 36 articles met the inclusion criteria and were considered in this review....

Université de Fribourg

Magnetism, superconductivity, and coupling in cuprate heterostructures probed by low-energy muon-spin rotation

Wojek, B. M. ; Morenzoni, E. ; Eshchenko, D. G. ; Suter, A. ; Prokscha, T. ; Keller, H. ; Koller, E. ; Fischer, Ø. ; Malik, Vivek Kumar ; Bernhard, Christian ; Döbeli, M.

In: Physical Review B - Condensed matter and materials physics, 2012, vol. 85, no. 2, p. 024505

We present a low-energy muon-spin-rotation study of the magnetic and superconducting properties of YBa₂Cu₃O7−δ/PrBa₂Cu₃O7−δ trilayer and bilayer heterostructures. By determining the magnetic-field profiles throughout these structures, we show that a finite superfluid density can be induced in otherwise semiconducting PrBa₂Cu₃O7−δ layers...

Université de Fribourg

Vers une pédagogie des contacts dans l’enseignement des langues-cultures : une synthèse = Kontaktpädagogik im Unterricht von Sprachen und Kulturen: Kurzbericht

Wokusch, Susanne ; Li Rosi, Tiziana ; Margonis-Pasinetti, Rosanna ; Zoller, Veronika

(Rapports du Centre scientifique de compétence sur le plurilinguisme)

Aujourd’hui, tout apprentissage d’une langue-culture étrangère (LCE) devrait inclure l’opportunité d’utiliser la langue apprise dans un contexte réel avec des interlocutrices de cette LCE. Or, dans le cadre de l’école obligatoire notamment, les échanges physiques restent limités à une petite minorité d’élèves et d’enseignantes et ce, malgré l’existence de...

Consortium of Swiss Academic Libraries

Parsing Economic Technology Matrices by Triangular Decomposition

Wolff, Reiner

In: Computational Economics, 2005, vol. 25, no. 3, p. 275-279