Search results for " format"
showing 10 items of 2156 documents
Experimental and numerical study of noise effects in a FitzHugh-Nagumo system driven by a biharmonic signal
2013
Using a nonlinear circuit ruled by the FitzHugh-Nagumo equations, we experimentally investigate the combined effect of noise and a biharmonic driving of respective high and low frequency F and f. Without noise, we show that the response of the circuit to the low frequency can be maximized for a critical amplitude B of the high frequency via the effect of Vibrational Resonance (V.R.). We report that under certain conditions on the biharmonic stimulus, white noise can induce V.R. The effects of colored noise on V.R. are also discussed by considering an Ornstein-Uhlenbeck process. All experimental results are confirmed by numerical analysis of the system response.
Noise-enhanced propagation in a dissipative chain of triggers
2002
International audience; We study the influence of spatiotemporal noise on the propagation of square waves in an electrical dissipative chain of triggers. By numerical simulation, we show that noise plays an active role in improving signal transmission. Using the Signal to Noise Ratio at each cell, we estimate the propagation length. It appears that there is an optimum amount of noise that maximizes this length. This specific case of stochastic resonance shows that noise enhances propagation.
Large Fibres in Urinary Calculi—-Promoters of Stone Formation
1988
Large fibres (phi 10-20 microns, length up to 5,000 microns) are sometimes imbedded in urinary calculi. It may be that these fibres can catch sediment particles and promote stone growth. By scanning electron microscopy the morphology of the fibres was studied as well as the relationship of the fibres with crystalline stone components. The reported findings suggest that the fibres are possibly formed in the tubuli as the result of an hitherto unknown defect.
L'Analogie chez Aristote
2021
Revue de philosophie dont l’objet est de montrer, d’interroger ou d’évaluer les comparaisons effectives dans les différents champs disciplinaires, Analogia est une publication scientifique annuelle de l’IPC.Chaque numéro réunit un conseil scientifique nouveau chargé de sélectionner les contributions en double aveugle.L’Analogie chez Aristote.Sous la direction d’Emmanuel Brochier.Conseil scientifique :- Katerina Ierodiakonou (Genève – Athènes)- André Laks (Paris)- Benjamin C. Morison (Princeton)- Jean-Luc Solère (Boston)Sommaire :- Présentation, par Emmanuel Brochier, p. 5 ;- Christof Rapp : "Spotting similarities between disparate items" Observations on the use of analogy in Aristotle’s met…
A strategic needs perspective on operations outsourcing and other inter-firm relationships
2013
Abstract This paper considers two issues: the formation of inter-firm relationships, and the choice of governance form. These have been widely investigated in both the strategic management and operations management fields. This paper contributes to the literature in three ways. First, we address why firms enter inter-firm relationships by hypothesizing that managers enter them to pursue three strategic needs, that is: efficiency/effectiveness, knowledge/learning, and global market access. Our first contribution evidences the relationship between the above strategic needs and a number of operational objectives that managers normally pursue in an inter-firm relationship. Second, we hypothesiz…
Les stratégies de contournement de la licence sont-elles payantes pour les formations scientifiques ?
2012
Cet ouvrage est le résultat des derniers travaux du groupe de travail sur l'enseignement supérieur (GTES), qui réunit des chargés d'études du Céreq et de ses centres associés, des représentants des observatoires des universités et de la DGESIP. En ligne sur : http://www.cereq.fr/index.php/publications/Relief/Etudier-en-licence-parcours-et-insertion; La diversité des parcours de formation dans l'enseignement supérieur permet aux étudiants des stratégies d'évitement ou de contournement de certains diplômes. C'est notamment le cas dans les filières scientifiques où moins de la moitié des diplômés de master a accédé à un cursus licence après le baccalauréat. A partir des données de l'enquête Gé…
Se former sans y être obligé. Le rôle du contexte de l'entreprise
2018
International audience; Les dernières réformes de la formation professionnelle ainsi que celle à venir ont pour objectif d'améliorer l'accès à la formation continue en responsabilisant le salarié. Mais faciliter la participation à ces formations semble complexe. L'intérêt de cette étude est de mieux comprendre les stratégies d'investissement en formation continue, tout en prenant en compte le contexte de l'entreprise. Il semble exister une légère différence de participation à une formation non imposée d'une entreprise à l'autre mais l'essentiel de la variabilité se situe entre les salariés. On montre toutefois que si l'entreprise réalise un plan de formation à partir des besoins recueillis …
Revista electrónica de investigación y evaluación educativa
2010
Este trabajo tiene el propósito de mostrar el uso de la metodología de Modelos de Ecuaciones Estructurales (SEM) para validar la estructura conceptual de cuestionarios de contexto que se utilizan en los estudios nacionales e internacionales para evaluar el logro educativo de los escolares. Desgraciadamente, los organismos evaluadores no destinan los mismos recursos técnicos a los cuestionarios de contexto que a las pruebas de aprendizaje, por lo que rara vez los primeros son sujetos a estudios de validez. Para mostrar el uso de la metodología SEM, se seleccionó el cuestionario dirigido a alumnos que utilizó el Instituto Nacional para la Evaluación de la Educación (INEE) para conocer los fac…
Interactive Effects of Explicit Emergent Structure: A Major Challenge for Cognitive Computational Modeling
2015
International audience; David Marr's (1982) three-level analysis of computational cognition argues for three distinct levels of cognitive information processingnamely, the computational, representational, and implementational levels. But Marr's levels areand were meant to bedescriptive, rather than interactive and dynamic. For this reason, we suggest that, had Marr been writing today, he might well have gone even farther in his analysis, including the emergence of structurein particular, explicit structure at the conceptual levelfrom lower levels, and the effect of explicit emergent structures on the level (or levels) that gave rise to them. The message is that today's cognitive scientists …
Measuring destination image an approach by an attribute‐based analysis
2001
Product image formation process is a valuable insight for correct understanding of consumer behaviour. When product is a tourism destination, image formation is even more important due to the inability of pretest the tourist product. This framework gives place to the present research on tourism destination image. The paper starts with a litterature review on the meaning and measurement of destination image divided into two main approaches: the conceptual and the methodological. Secondly, the results of an empirical investigation are reported: it deals with the assessment of attribute‐based destination image of sun and beach resorts on the Spanish Mediterranean coast. The aim and contributio…