2,695 research outputs found
Recommended from our members
Living With/Out Proximity: Comparing a Contested Concept in Tort
National audienceCertaines femmes victimes de violences conjugales sâinscrivent dans un parcours de rĂ©silience et manifestent une attitude positive, voire passionnĂ©e, vis-Ă -vis de l'apprentissage de connaissances et de capacitĂ©s nouvelles. Cette observation renvoie au concept d'apprenance proposĂ© en sciences de l'Ă©ducation (CarrĂ©, 2005).Cette attitude dâapprenance, sâexprimant par diffĂ©rentes pratiques particuliĂšrement autodidactes, orientĂ©es vers la comprĂ©hension de lâĂ©vĂ©nement traumatique (telles que la lecture dâouvrages spĂ©cialisĂ©s sur les violences, lâEtat de Stress Post-Traumatique, la rĂ©silience, des rĂ©cits de vie, mais Ă©galement des recherches sur internet, le suivi de confĂ©rences et de stages en dĂ©veloppement personnel, âŠ), pourrait-elle favoriser la rĂ©silience ? Ces pratiques sont- elles uniquement le fruit de dispositions apprenantes antĂ©rieures au traumatisme ou pourraient-elles Ă©merger Ă la suite de ce dernier ? On peut par ailleurs sâinterroger sur les usages et bĂ©nĂ©fices personnels et sociaux que ces femmes font de leurs expĂ©riences, de leurs nouvelles connaissances et capacitĂ©s.Cette recherche en cours tend Ă rĂ©pondre Ă ces questions par une Ă©tude Ă la fois qualitative (par des entretiens autobiographiques) et quantitative (par questionnaire), auprĂšs du public cible. LâenquĂȘte exploratoire a consistĂ© en des entretiens autobiographiques auprĂšs de 5 femmes ayant Ă©tĂ© victimes de violences. Ces entretiens ont montrĂ© que ces femmes ont multipliĂ© les ressources afin de comprendre leur histoire, pouvoir mettre des mots sur lâĂ©vĂ©nement traumatique et ainsi pouvoir progressivement sâinscrire dans un parcours rĂ©silient. Lâensemble de ces ressources les a conduites non seulement Ă se rĂ©tablir, mais Ă©galement Ă dĂ©velopper une vĂ©ritable expertise. Certaines dâentre elles souhaitent, aujourdâhui, mettre Ă profit leurs connaissances et compĂ©tences acquises de maniĂšre expĂ©rientielle et didactique, afin de soutenir et accompagner dâautres personnes vulnĂ©rables.Lâobjectif de cette recherche sera, dâune part, de comprendre le lien entre lâapprenance comme ressource et la rĂ©silience comme parcours. Lâapprenance pourrait ainsi ĂȘtre intĂ©grĂ©e parmi les facteurs de rĂ©silience. Dâautre part, cette recherche sera susceptible dâapporter un Ă©lĂ©ment intĂ©ressant au domaine de la victimologie et de la psychotraumatologie, en proposant des pistes complĂ©mentaires dans lâaccompagnement des anciennes victimes de violences, notamment par le rĂŽle facilitateur et incitateur dâapprentissage du psychothĂ©rapeute et du travailleur social
Statistical periodicity in driven quantum systems: General formalism and application to noisy Floquet topological chains
Much recent experimental effort has focused on the realization of exotic
quantum states and dynamics predicted to occur in periodically driven systems.
But how robust are the sought-after features, such as Floquet topological
surface states, against unavoidable imperfections in the periodic driving? In
this work, we address this question in a broader context and study the dynamics
of quantum systems subject to noise with periodically recurring statistics. We
show that the stroboscopic time evolution of such systems is described by a
noise-averaged Floquet superoperator. The eigenvectors and -values of this
superoperator generalize the familiar concepts of Floquet states and
quasienergies and allow us to describe decoherence due to noise efficiently.
Applying the general formalism to the example of a noisy Floquet topological
chain, we re-derive and corroborate our recent findings on the noise-induced
decay of topologically protected end states. These results follow directly from
an expansion of the end state in eigenvectors of the Floquet superoperator.Comment: 13 pages, 5 figures. This is the final, published versio
Tweets Are Not Created Equal:investigating Twitter's client ecosystem
This article offers an investigation into the developer ecosystem of platforms drawing on the specific case of Twitter and explores how third-party clients enable different âways of beingâ on Twitter. It suggests that researchers need to consider digital data as traces of distributed accomplishments between platforms, users, interfaces, and developers. The argument follows three main steps: We discuss how Twitterâs bounded openness enables and structures distributed data production through grammatization of action. We then suggest ways to explore and qualify sources by drawing on a weeklong data set of nearly 32 million tweets, retrieved from Twitterâs 1% random sample. We explore how clients show considerable differences in tweet characteristics and degrees of automation, and outline methodological steps to deploy the source variable to further investigate the heterogeneous practices common metrics risk flattening into singular counts. We conclude by returning to the question about the measures of the medium, suggesting how they might be revisited in the context of increasingly distributed platform ecosystems, and how platform data challenge key ideas of digital methods research
Mitosis â The story
Copyright © Springer 2011. NOTICE: This is the authorâs final version of a work accepted for publication by Springer. The original publication is available at www.springerlink.co
The formation of young massive clusters by colliding flows
Young massive clusters (YMCs) are the most intense regions of star formation
in galaxies. Formulating a model for YMC formation whilst at the same time
meeting the constraints from observations is highly challenging however. We
show that forming YMCs requires clouds with densities 100 cm
to collide with high velocities ( 20 km s). We present the
first simulations which, starting from moderate cloud densities of
cm, are able to convert a large amount of mass into stars over a time
period of around 1 Myr, to produce dense massive clusters similar to those
observed. Such conditions are commonplace in more extreme environments, where
YMCs are common, but atypical for our Galaxy, where YMCs are rare.Comment: 6 pages, 5 figures, accepted for publication in MNRAS Letter
Site determination and thermally assisted tunneling in homogenous nucleation
A combined low-temperature scanning tunneling microscopy and density
functional theory study on the binding and diffusion of copper monomers,
dimers, and trimers adsorbed on Cu(111) is presented. Whereas atoms in trimers
are found in fcc sites only, monomers as well as atoms in dimers can occupy the
stable fcc as well as the metastable hcp site. In fact the dimer fcc-hcp
configuration was found to be only 1.3 meV less favorable with respect to the
fcc-fcc configuration. This enables a confined intra-cell dimer motion, which
at temperatures below 5 K is dominated by thermally assisted tunneling.Comment: 4 pages, 4 figure
A platform independent communication library for distributed computing
We present MPWide, a platform independent communication library for performing message passing between supercomputers. Our library couples several local MPI applications through a long distance network using, for example, optical links. The implementation is deliberately kept light-weight, platform independent and the library can be installed and used without administrative privileges. The only requirements are a C++ compiler and at least one open port to a wide area network on each site. In this paper we present the library, describe the user interface, present performance tests and apply MPWide in a large scale cosmological N-body simulation on a network of two computers, one in Amsterdam and the other in Tokyo
Nitrogen bioavailability from organic amendments and cover crops in broccoli, sweet corn, and potato
Non-Peer Reviewe
- âŠ