Search results for " format"
showing 10 items of 2156 documents
Parametric Solitons in Two-Dimensional Lattices of Purely Nonlinear Origin
2008
We demonstrate spatial solitons via twin-beam second-harmonic generation in hexagonal lattices realized by poling lithium niobate planar waveguides. These simultons can be steered by acting on power, direction, and wavelength of the fundamental frequency input.
An unusual conchorhynch from the upper Maastrichtian of the southeast Netherlands and the distinction between nautiloid and ammonoid conchorhynchs (M…
2022
Abstract A single, atypical conchorhynch (calcitic tip of a cephalopod lower jaw), recovered from the uppermost Meerssen Member (Maastricht Formation, upper Maastrichtian) at the former ENCI-HeidelbergCement Group quarry, south of Maastricht, is described as a new parataxon, Conchorhynchus illustris sp. nov. The specimen can be differentiated from all previous conchorhynch records on account of its large size, elongated shape and, in particular, of the structure of its apical part which is smooth and forwardly elongated. During the Late Cretaceous, conchorhynchs formed part of the jaw apparatus of nautilids and of two ammonoid suborders, Phylloceratina and Lytoceratina. Since conchorhynchs …
La rentabilité salariale des parcours d'études non linéaires
2016
International audience; En France, les reprises d'études sont de moins en moins rares. La question de la poursuite d'études comme alternative à l'entrée sur le marché du travail se pose puisqu'elle représente un coût pour les individus. Si certaines études ont tenté d'évaluer l'impact du retour en formation longue sur la situation professionnelle, il serait intéressant de s'interroger sur sa rentabilité en termes de revenus. Nous mettons en évidence la difficulté de mesurer l'écart de salaires entre les parcours linéaires et les reprises d'études. Au premier abord, la reprise d'études semble avoir un impact positif sur les salaires. Cependant, en comparant la valeur des niveaux de diplôme d…
Les situations de NEET dans les parcours d'insertion des jeunes en France
2017
En ligne sur http://www.cereq.fr/content/download/19236/167943/file/Rendement%20%C3%A9ducatif%20parcours%20et%20in%C3%A9galit%C3%A9s%20dans%20l'insertion%20des%20jeunes_C%C3%A9reqEchanges%205.pdf; National audience; Si la France a une part de NEET proche de la moyenne européenne, cette population est encore peu étudiée, notamment dans une perspective longitudinale. L'objet de cette recherche est d'analyser les difficultés d'accès à l'emploi ou de retour en formation de ces jeunes, lors des trois premières années qui suivent la fin de formation initiale. L'enquête Génération permet d'identifier les profils des jeunes sortis en 2010 qui ont le plus de risques de devenir et de rester NEET (ni …
Qualifications et parcours - Qualification des parcours. XXVèmes journées du longitudinal, Nantes, 20 et 21 juin 2019
2019
International audience; Les XXVèmes journées du longitudinal (JDL) se proposaient de questionner deux notions : la qualification et les parcours ainsi que leur articulation. Elles furent l'occasion d'évoquer les parcours biographiques et de saisir la qualification des personnes comme un construit dans le temps, dans une perspective de « formation tout au long de la vie ». Ces journées ont permis de discuter de la polarisation des parcours tels les parcours d'exclusion et parcours d'accès aux qualifications les plus socialement valorisées mais aussi de la multiplication des parcours atypiques remettant en cause les relations directes entre réussite ou échec scolaire d'une part, insertion pro…
La participation financière des entreprises à l'enseignement supérieur initial français
1994
International audience
GeV-scale neutrinos: interactions with mesons and DUNE sensitivity
2021
The simplest extension of the SM to account for the observed neutrino masses and mixings is the addition of at least two singlet fermions (or right-handed neutrinos). If their masses lie at or below the GeV scale, such new fermions would be produced in meson decays. Similarly, provided they are sufficiently heavy, their decay channels may involve mesons in the final state. Although the couplings between mesons and heavy neutrinos have been computed previously, significant discrepancies can be found in the literature. The aim of this paper is to clarify such discrepancies and provide consistent expressions for all relevant effective operators involving mesons with masses up to 2 GeV. Moreove…
Dark matter-neutrino interactions through the lens of their cosmological implications
2018
Dark matter and neutrinos provide the two most compelling pieces of evidence for new physics beyond the Standard Model of Particle Physics but they are often treated as two different sectors. The aim of this paper is to determine whether there are viable particle physics frameworks in which dark matter can be coupled to active neutrinos. We use a simplified model approach to determine all possible renormalizable scenarios where there is such a coupling, and study their astrophysical and cosmological signatures. We find that dark matter-neutrino interactions have an impact on structure formation and lead to indirect detection signatures when the coupling between dark matter and neutrinos is …
Involvement of multiple myeloma cell-derived exosomes in osteoclast differentiation
2015
Bone disease is the most frequent complication in multiple myeloma (MM) resulting in osteolytic lesions, bone pain, hypercalcemia and renal failure. In MM bone disease the perfect balance between bone-resorbing osteoclasts (OCs) and bone-forming osteoblasts (OBs) activity is lost in favour of OCs, thus resulting in skeletal disorders. Since exosomes have been described for their functional role in cancer progression, we here investigate whether MM cell-derived exosomes may be involved in OCs differentiation. We show that MM cells produce exosomes which are actively internalized by Raw264.7 cell line, a cellular model of osteoclast formation. MM cell-derived exosomes positively modulate pre-…
Abnormal accumulation of autophagic vesicles correlates with axonal and synaptic pathology in young Alzheimer's mice hippocampus
2012
Dystrophic neurites associated with amyloid plaques precede neuronal death and manifest early in Alzheimer's disease (AD). In this work we have characterized the plaque-associated neuritic pathology in the hippocampus of young (4- to 6-month-old) PS1(M146L)/APP(751SL) mice model, as the initial degenerative process underlying functional disturbance prior to neuronal loss. Neuritic plaques accounted for almost all fibrillar deposits and an axonal origin of the dystrophies was demonstrated. The early induction of autophagy pathology was evidenced by increased protein levels of the autophagosome marker LC3 that was localized in the axonal dystrophies, and by electron microscopic identification…