266 research outputs found
Le goupi (Goupia glabra Aubl), essence forestiĂšre d'avenir en Guyane : analyse bibliographique
International audienc
La géopolitique : une histoire contrastée
RivalitĂ©s de pouvoirs ou dâinfluences sur des territoires, rivalitĂ©s pour le contrĂŽle ou la domination de territoires de grande ou de trĂšs petite taille, rivalitĂ©s entre des pouvoirs politiques de toutes sortes, et pas seulement entre des Ătats, mais aussi entre des tribus, des mouvements politiques ou religieux... tel est le sens quâYves Lacoste donne au mot gĂ©opolitique.According to Yves Lacoste, the word geopolitics means: power rivalries within territories; competition for the control or the domination of large or very small territories of all sorts. These rivalries occur not only between nation States but also between tribes, political groups or religious forces
LâĂ©cosystĂšme buccal chez le patient ĂągĂ©
La bouche est une cavitĂ© naturelle complexe qui forme le segment initial du tube digestif. Elle est un acteur essentiel des fonctions vitales que sont la nutrition, le langage et la communication. Lâensemble de la bouche (dents, parodonte, muqueuses, langue) est constamment hydratĂ© et lubrifiĂ© par la salive. Ă tout Ăąge, un Ă©quilibre sâĂ©tablit entre la prolifĂ©ration bactĂ©rienne, le flux salivaire et la rĂ©ponse tissulaire : câest lâĂ©cosystĂšme buccal. La rĂ©gulation de cet Ă©cosystĂšme participe Ă la protection du complexe buccal contre les pathologies inflammatoires et infectieuses courantes (caries, gingivites, parodontopathies,candidoses). Chez les patients ĂągĂ©s, la modification du flux salivaire, lâapparition de pathologies spĂ©cifiques (caries radiculaires, absence de dents, parodontopathies. . .), les conditions locales (prĂ©sence de prothĂšses amovibles), le dĂ©veloppement de pathologies gĂ©nĂ©rales telles que le diabĂšte, lâhypertension, la baisse des dĂ©fenses immunitaires, la nĂ©gligence de lâhygiĂšne quotidienne sont autant dâĂ©lĂ©ments qui vont dĂ©sĂ©quilibrer lâĂ©cosystĂšme buccal, favoriser la formation du biofilm (plaque bactĂ©rienne) et fragiliser les tissus bucco-dentaires. Le maintien de cet Ă©cosystĂšme est essentiel pour le patient ĂągĂ© : il lui permet de sâalimenter dans de bonnes conditions et ainsi prĂ©venir les risques de dĂ©nutrition. Les auteurs dĂ©crivent la physiopathologie buccale (flore buccale, sĂ©crĂ©tion salivaire) et les stratĂ©gies Ă adopter pour prĂ©server lâĂ©quilibre buccal chez le patient ĂągĂ©
Government Geoscience Stimulates Mineral Exploration in the Superior Province, Northern Québec
This paper summarizes new geologic information, and highlights exploration opportunities in the northeastern part of the Superior Province since 1997, as a result of the Far North Program undertaken by Géologie Québec. The first phase of the program was a regional lake-sediment geochemical survey, where 26,000 samples were collected north of 55°N from an area of approximately 350,000 km2. The resulting database attracted many mining companies to the region and led to numerous mineral discoveries. The second phase, started in 1998, consisted of extensive geological mapping, supplemented by U-Pb geochronological work; by 2003, more than twenty, 1:250,000 mapping projects were completed. The Far North Program is now in its final phase and it will produce a comprehensive geological and metallogenic synthesis of the new data from the areas surveyed. About forty previously unknown volcano-sedimentary belts, numerous mafic-ultramafic intrusions and sixteen different mineral deposit types have been identified. Since 1997, this has resulted in a surge of exploration activity that has seen more than
Landscape design for soil conservation under land use and climate change
International audienceSoils and landscapes evolve simultaneously. Soil evolution is controlled by redistribution and transformation processes influenced by topographic and climatic parameters, with also a major contribution of management strategies. The perennial landscape features have a strong influence on soil spatial distribution (geometry) and soil genesis. Building landscapes which enhance soil resilience to degradation processes and increase soil services appears as a promising way to adapt to forthcoming climatic and land use evolutions. The presentation aims to synthetize major results from a research program nicknamed Landsoil which focused on the evolution of agricultural soils over medium time scales (decades to centuries) in relation to changing conditions of land use and climate. Precise study of the soil 3D organization in three contrasted landscapes (Brittany, Touraine, Languedoc-Roussillon) enabled to link soil redistribution in space to landscape components (field geometry, hedges or ditches network) and their past evolution. A dynamic and high resolution spatial modeling approach was developed coupling erosion processes and soil organic matter evolution and was calibrated over past evolution using dating techniques (Cs137, C14, OSL). The resulting Landsoil model was afterwards applied in a prospective manner under different scenarios of land use and climate change over the 21th century. Indicators of soil vulnerability and soil resilience were defined and tested by the comparison of several prospective scenarios applied on a same landscape and by comparison of the contrasted landscapes
COVID-19 symptoms at hospital admission vary with age and sex: results from the ISARIC prospective multinational observational study
Background:
The ISARIC prospective multinational observational study is the largest cohort of hospitalized patients with COVID-19. We present relationships of age, sex, and nationality to presenting symptoms.
Methods:
International, prospective observational study of 60â109 hospitalized symptomatic patients with laboratory-confirmed COVID-19 recruited from 43 countries between 30 January and 3 August 2020. Logistic regression was performed to evaluate relationships of age and sex to published COVID-19 case definitions and the most commonly reported symptoms.
Results:
âTypicalâ symptoms of fever (69%), cough (68%) and shortness of breath (66%) were the most commonly reported. 92% of patients experienced at least one of these. Prevalence of typical symptoms was greatest in 30- to 60-year-olds (respectively 80, 79, 69%; at least one 95%). They were reported less frequently in children (â€â18 years: 69, 48, 23; 85%), older adults (â„â70 years: 61, 62, 65; 90%), and women (66, 66, 64; 90%; vs. men 71, 70, 67; 93%, each Pâ<â0.001). The most common atypical presentations under 60 years of age were nausea and vomiting and abdominal pain, and over 60 years was confusion. Regression models showed significant differences in symptoms with sex, age and country.
Interpretation:
This international collaboration has allowed us to report reliable symptom data from the largest cohort of patients admitted to hospital with COVID-19. Adults over 60 and children admitted to hospital with COVID-19 are less likely to present with typical symptoms. Nausea and vomiting are common atypical presentations under 30 years. Confusion is a frequent atypical presentation of COVID-19 in adults over 60 years. Women are less likely to experience typical symptoms than men
Words that reveal: Jean-Yves Lacoste and the experience of God
Much of the contemporary discussion of religion seems to do away with the very possibility of revelation. In this article, I use Lacosteâs phenomenology of la parole to rethink a theology of revelation in terms of Godâs personal self-giving in experience. After examining Lacosteâs views of the relationship between philosophy and theology, his liturgical reduction and what this means for an understanding of experience and knowledge, and his thought of la parole more broadly, I give critical consideration to how he thinks the possibility of Godâs address to humanity. Lacoste maintains that Godâs presence in experience may be known through affection, and, indeed, that the word may so move us that we are able to recognise that presence. He uses the notion of self-evidence rather than the usual phenomenological category of evidence to evince the reasonableness of this response. I argue that while Lacoste accords due deference to a traditional understanding of revelation as the repetition or unfolding of a word addressed to us in the past, his thought also allows us to think revelation as a contemporary event, the hermeneutics of which allow us to know God in ways that are new
Le concept de sous-développement et la Géographie
The concept of under-development in geography
The concept of under-development in geography (Abstract). â The concept of underdevelopment often causes geographers to be rĂ©ticent, and is also the object of confiicting opinions. By using strictly geogra-phical criteria it is possible to give an objective dĂ©finition : â Underdevelopment is an internai imbalance between the growth of the population and the insufflciency of the increase in the resources which the population has at its-disposai. This insufficient Ă©conomie growth is the resuit of a failure to utilise the natural potential to the full. This nĂ©gative balance-sheet between peoples an& natural resources suberibes completely to the theory of « Possibilisme » of Vidal de La Blache. Obviously this theory does not exclude geographical determinism the rĂŽle of which appears ail the greater when the facts are studied on a greater scale (local and rĂ©gional circumstances). The study of underdevelopment accor-ding to rĂ©gional geographical methods obviously remains essential. But it also seems more and more necessary to carry out comparative studies between the various parts of the underdeveloped areas and to examine the circumstances of underdevelopment in its world context. This cornes within the methods of gĂȘnerai geography which can be very usefully transformed by the adoption of the concept of underdevelopment as a fundamental geographical notion.Lacoste Yves. Le concept de sous-dĂ©veloppement et la GĂ©ographie. In: Annales de GĂ©ographie, t. 76, n°418, 1967. pp. 644-670
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