Search results for "Global"
showing 10 items of 3796 documents
Perturbations associées à l'épuisement professionnel et attributions causales du stress chez des soignants en services de psychiatrie
2011
La présente étude, réalisée auprès de soignants psychiatriques, propose d'évaluer le burnout en rapport avec d'autres perturbations associées : niveaux d'estime de soi plus faibles dans les différents domaines (S.E.I.), fréquence du stress ressenti (N.S.S.), moindre sentiment de contrôle général (Lumpkin), perception plus négative de l'état de santé général (C.I.D.I.S.), insatisfaction par rapport au travail et insatisfactions dans de nombreux domaines de vie (P.Q.V.S.). D'autre part, il apparaît que le fait de décrire les causes de son épuisement professionnel comme ayant un impact " global " sur son comportement, est révélateur de son épuisement émotionnel et des perturbations associées. …
Les entreprises algériennes face à leur déficit d'image. Colloque international culture communication et globalisation
2008
Prédiction de cycle et stratégie de gestion énergétique basée sur une méthode d’optimisation globale
2017
International audience; La nécessité de prédire le cycle de conduite d’un automobiliste afin d’améliorer sa gestion énergétique et ainsi réduire la consommation de carburant a été démontré (Debert, Quigley). Dès lors, il serait aisé d’appliquer une méthode d’optimisation globale, telle que la Programmation Dynamique (DP en anglais), pour obtenir la stratégie optimale. Cette méthode est déjà utilisée dans de nombreuses applications (Sciarretta), mais au quotidien nombreux sont les facteurs environnants qui peuvent perturber les conditions de circulation (météo, travaux, accidents....) et impacter le cycle de conduite. Il est donc nécessaire d’élaborer une stratégie adaptative en temps réel. …
Could the acid-base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification?
2015
13 pages; International audience; Increasing atmospheric carbon dioxide concentration alters the chemistry of the oceans towards more acidic conditions. Polar oceans are particularly affected due to their low temperature, low carbonate content and mixing patterns, for instance upwellings. Calcifying organisms are expected to be highly impacted by the decrease in the oceans' pH and carbonate ions concentration. In particular, sea urchins, members of the phylum Echinodermata, are hypothesized to be at risk due to their high-magnesium calcite skeleton. However, tolerance to ocean acidification in metazoans is first linked to acid–base regulation capacities of the extracellular fluids. No infor…
Understanding the Strategies and Practices of Facebook Microcelebrities for Engaging in Sociopolitical Discourses
2022
In this paper, we study popular microcelebrities from the Global South to understand their strategies and practices on Facebook. Unlike traditional celebrities who gain their reputation through different types of physical performance, these microcelebrities attain their status by presenting themselves in a favorable way to their online followers. We conducted interviews with 19 microcelebrities from Bangladesh and analyzed our data using actor-network theory (ANT) and Goffman’s dramaturgical analysis (DA) of human interaction. We discuss the complex socio-technical ecosystem of the microcelebrity and the roles of non-human actors, such as platforms and local internet infrastructure along wi…
Using natural analogues to investigate the effects of climate change and ocean acidification on Northern ecosystems
2018
AbstractNorthern oceans are in a state of rapid transition. Still, our knowledge of the likely effects of climate change and ocean acidification on key species in the food web, functionally important habitats and the structure of Arctic and sub-Arctic ecosystems is limited and based mainly on short-term laboratory studies on single species. This review discusses how tropical and temperate natural analogues of carbonate chemistry drivers, such as CO2 vents, have been used to further our knowledge of the sensitivity of biological systems to predicted climate change, and thus assess the capacity of different species to show long-term acclimation and adaptation to elevated levels of pCO2. Natur…
A Robust Multi Stage Technique for Image Binarization of Degraded Historical Documents
2017
International audience; Document image binarization is a central problem in many document analysis systems. Indeed, it represents one of the basic challenges, especially in case of historical documents analysis. In this paper, we propose a novel robust multi stage framework that combines different existing document image thresholding methods for the purpose of getting a better binarization result. CLAHE technique is introduced to significantly enhance contrast in some poor images. The proposed method then uses a hybrid algorithm to partition image into foreground and background. A special procedure is finally applied in order to remove small noise and correct characters morphology. Experime…
Evaluation of Landscape Quality in Valencia's Agricultural Gardens : a Method Adapted to Multifunctional, Territorialized Agrifood Systems (MTAS)
2022
Multifunctional agrifood systems with noteworthy roots in a territory are the result of a historical yet dynamic specialization. They are present in the place’s knowledge, social connections, collective action, the organization of institutions, innovation and capital. These systems are seen in the landscape, which becomes a resource as well as cultural and environmental heritage. In this regard, it is necessary to study the significance of the many aspects of heritage and landscape in agrifood systems to suitably manage and appreciate them as a territorial resource. This study develops and applies a quantitative method with various criteria to enable the landscape values of multifunctional,…
Climate and agriculture: empirical evidence for countries and agroecological zones of the Sahel
2022
International audience; ow heterogenous is the impact of climate change across space and the type of agricultural production? In this paper, we investigate the relationship between climate change and variability, measured by temperature and rainfall, and agricultural production at the country and agroecological zone levels of the Sahel. We consider a crop production index and five cereals (maize, millet, sorghum, wheat and rice). Based on an original climate database and an agricultural production function estimated for the period 1961–2016, we show that average rainfall and temperature during the growing season indeed have highly heterogeneous effects on agricultural production, depending …
Ambient Air Pollution Increases the Risk of Cerebrovascular and Neuropsychiatric Disorders through Induction of Inflammation and Oxidative Stress
2020
Exposure to ambient air pollution is a well-established determinant of health and disease. The Lancet Commission on pollution and health concludes that air pollution is the leading environmental cause of global disease and premature death. Indeed, there is a growing body of evidence that links air pollution not only to adverse cardiorespiratory effects but also to increased risk of cerebrovascular and neuropsychiatric disorders. Despite being a relatively new area of investigation, overall, there is mounting recent evidence showing that exposure to multiple air pollutants, in particular to fine particles, may affect the central nervous system (CNS) and brain health, thereby contributing to …