WorldWideScience

Sample records for energetique quels enjeux

  1. The globalization of energy activities: what are the issues?; La mondialisation des activites energetiques: quels enjeux?

    Energy Technology Data Exchange (ETDEWEB)

    Percebois, J. [Montpellier I Univ., (France)

    2001-03-01

    Globalization in many sectors such as information, research and development, finance, technology, etc. led to the implementation of transnational networks to facilitate decision-making. The result is that governments are left to regulation functions. This globalization also led to a larger gap between North and South. Developing countries represent 80 per cent of world population, yet only produce less than 33 per cent of gross domestic product (GDP). In the energy sector, developing countries have limited access to energy and use it less efficiently, since they do not master the latest technologies. States must retain their power to regulate this sector to ensure competition takes place in a fair environment within specified guidelines. Licenses must be issued through bidding or auctioned off, but in every case the State must ensure that commitments are met. It must also ensure that pricing is fair. Access for third parties to the power distribution system must be adequate, especially when the company operates in a monopoly environment. The State ends up managing a new category of risks (called major risks) that the private sector is not willing to consider, for example global warming or the management of nuclear waste. Confidence in market mechanisms is limited. Energy exchanges and others represent an economic growth factor and a potential guarantee for world peace. Who is responsible for the social costs associated with economic growth, and what are the solutions? A major issue left to decision-makers is the sharing of wealth within humankind and nations, and the State has a vital role to play. 5 refs., 5 tabs.

  2. « Se sentir vivant » : quels enjeux d’éducation biologique ?

    Directory of Open Access Journals (Sweden)

    Coquidé Maryline

    2015-01-01

    Full Text Available Avec un point de vue didactique, je discute des enjeux d’éducation biologique de « se sentir vivant ». Je distingue des perspectives d’enseignement de la biologie avec ceux d’éducation biologique, en reprenant ce que nos collègues allemands désignent par le concept Bildung. Je centre ensuite ma réflexion sur le corps et l’expérience vécue, la perception et la signification, en privilégiant un point de vue phénoménologique. Cette analyse est mise à l’épreuve selon trois approches du vivant: le vivant comme réduction, comme extension puis comme relations.

  3. Les enjeux futurs de la Qualité des fruits et légumes : quel positionnement à la croisée de l’environnement et de la nutrition ?

    OpenAIRE

    Padillla, Martine

    2010-01-01

    L’engagement des professionnels dans le développement durable suppose que tout produit ou service réponde notamment à des enjeux liés à l’environnement et à la nutrition. Ainsi qualité environnementale et qualité nutritionnelle, s'affichent comme des éléments de démarcation et offrent une valeur ajoutée sur un marché très concurrentiel. Nous centrons ici la réflexion sur la relation entre l’environnement et la nutrition à trois niveaux. (i) Au niveau de l’assiette, en quoi nos choix alimentai...

  4. Odyssée internet enjeux sociaux

    CERN Document Server

    Lajoie, Jacques

    2002-01-01

    Quels sont les véritables enjeux d'Internet? Comment évaluer l'importance de l'accessibilité au savoir technique? Internet amplifie-t-il les fractures sociales ou constitue-t-il un espace public plus transparent, plus universel? Pour répondre à ces questions, les auteurs analysent les pratiques de communication, de socialisation et d'exploration associées à Internet. Ils étudient certaines expériences innovatrices autour d'usages créatifs et proposent des réflexions vives et parfois controversées sur la nature et la culture d'Internet.

  5. Comparer les productions législatives: enjeux et méthodes

    NARCIS (Netherlands)

    Brouard, S.; Wilkerson, J.; Baumgartner, F.R.; Timmermans, A.; Bevan, S.; Breeman, G.E.; Breunig, C.; Chaqués, L.; Green-Pedersen, C.; Jennings, W.; John, P.

    2009-01-01

    Sur quels enjeux politiques les parlements légifèrent-ils ? Cette interrogation d’apparence anodine n’a que rarement fait l’objet d’une attention soutenue, particulièrement dans une perspective comparée. Pourtant la production des lois constitue l’un des éléments structurants d’une communauté

  6. Which future energetic package?; Quel bouquet energetique futur

    Energy Technology Data Exchange (ETDEWEB)

    Chevallier, B.

    2011-01-15

    In this plenary session presided over by Olivier Appert (President of the IFP new Energies), are considered hypotheses, evolutions or constraints which will orient the making of this package while satisfying the need of people mobility and flashing a searchlight on the conditions and problems raised by the gas development. (O.M.)

  7. The engineer, sustainable development craftsman at the center of the global energy challenge!; L'ingenieur, artisan du developpement durable au centre du defi energetique mondial!

    Energy Technology Data Exchange (ETDEWEB)

    Laplatte, Benjamin; Bourque, Francis; Granger, Francois P.; Dery, Gaston; Berube, Martin

    2010-09-15

    By its omnipresence in society, the energy question is at the heart of sustainable development issues. The engineer, as a central actor of human society development, is therefore tightly linked to the energy issue and he must actively contribute to resolve it by integrating to his practices the principles of sustainable development and by applying the solutions that arises. Part of these elements include as the main ones, listening to the consideration of citizens, becoming aware of the environment importance and reducing costs at all levels. The engineer is a social actor that cannot be ignored in the resolution of these issues. [French] Par son omnipresence dans la societe, la question energetique est au coeur des enjeux du developpement durable. L'ingenieur, etant un acteur central du developpement des societes humaines, est donc inextricablement lie a la question energetique qu'il doit contribuer activement a resoudre en integrant a sa pratique les principes du developpement durable et en appliquant les solutions qui en decoulent. Parmi ces elements, l'ecoute des considerations citoyennes, la prise de conscience de l'importance de l'environnement et la reduction des couts a tous les niveaux sont des elements centraux. L'ingenieur est un acteur social incontournable pour la resolution de ces enjeux.

  8. Conversations cruciales des outils pour s'exprimer quand les enjeux sont de taille

    CERN Document Server

    Patterson, Kerry; McMillan, Ron; Switzler, Al; Covey, Stephen R

    2009-01-01

    Quand on parle de " conversations cruciales ", il nous vient spontanément des images de présidents, d'empereurs et de Premiers ministres assis autour d'une table massive en train de débattre de l'avenir du monde. Les conversations dont parle cet ouvrage ne sont pas moins cruciales, nous concernent tous et peuvent survenir à n'importe quel moment dans notre vie quotidienne. Une discussion houleuse avec le patron, une dispute violente avec un collègue ou un client, un mot de trop adressé à notre conjoint, etc. Une conversation devient cruciale quand : les opinions en jeu sont opposées ; les enjeux sont importants ; les émotions sont fortes. Ce livre vous aide à vous exprimer habilement quand les enjeux sont de taille. Il vous explique comment atteindre le but que vous vous êtes fixé en usant des meilleures techniques et en ouvrant le chemin du dialogue. Il vous fournit les outils pour gérer les conversations les plus difficiles et les plus importantes de votre vie.

  9. Enseignement intégré de science et technologie, quels enjeux ?

    OpenAIRE

    ALICE DELSERIEYS-PEDREGOSA; JEAN MARIE BOILEVIN; PASCALE BRANDT-POMARES; DAMIEN GIVRY; PERRINE MARTIN

    2010-01-01

    Many countries are engaged in renovating science and technology teaching in secondary schools. In order to give more coherence to the content taught, the place and definition of the school subjects involved tend to be reexamined. In France, an integrated science and technology teaching program is being tested since 2006. A first analysis of the program and the way participating teachers view it has been done from the definition of several strategies to bring disciplines together. Four dimensi...

  10. Enseignement intégré de science et technologie, quels enjeux ?

    Directory of Open Access Journals (Sweden)

    ALICE DELSERIEYS-PEDREGOSA

    2010-07-01

    Full Text Available Many countries are engaged in renovating science and technology teaching in secondary schools. In order to give more coherence to the content taught, the place and definition of the school subjects involved tend to be reexamined. In France, an integrated science and technology teaching program is being tested since 2006. A first analysis of the program and the way participating teachers view it has been done from the definition of several strategies to bring disciplines together. Four dimensions of school disciplinary integration have been identified to structure our reflexion. The analysis of posters produced by the teachers reveals an incomplete vision of integration and a dominant place given to notional knowledge.

  11. Global warming what are the challenges for Copenhagen?; Rechauffement climatique. Quels enjeux pour Copenhague?

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    2010-07-01

    The Kyoto Protocol was adopted in 1997 and, following a long ratification process, went into effect in 2005. Under the Protocol, 200 countries have committed to reducing their greenhouse gas emissions (GHG) by 2012. What conclusions can we draw from developments thus far, as we await the December conference in Copenhagen to determine a follow-up to the Kyoto Protocol? The work of the Intergovernmental Panel on Climate Change (IPCC) has given us more accurate knowledge on global warming issues. In its latest report, published in 2007, the IPCC reveals that eleven of the past twelve years studied - 1995 to 2006 - were among the warmest yet recorded since 1850, when this type of data collection began. From 1906 to 2005, global temperatures rose by 0.74 deg. C, and the average rate of increase has more than doubled over the past fifty years. To help companies and countries achieve their GHG emissions reduction targets, the Kyoto Protocol provides for a carbon trading system based on carbon reduction credits (CRC), the exchange currency in a carbon credit market. When a company reduces its emissions below regulatory levels, it can have the 'excess' reduction certified and converted into carbon credits, which it can then sell to a company that has not yet reached its reduction targets. Japan has already used clean technologies and energy saving measures to achieve energy efficiency in the past. Its energy structure is fairly close to that of France, which has a 0% emissions goal. In Japan, nuclear power also accounts for a significant share of the electric power program. The Japanese government recently announced that it was increasing its carbon reduction goal from 6% to an ambitious 25%. China and the United States are the world's leading greenhouse gas emitters. When China ratified the Kyoto Protocol in 2002, it was considered to be a developing country and as such has no emissions reduction obligations. Since then, China has moved closer to the Protocol principles, creating a national climate change group in 2007 and launching its own national climate change program. The program's goal is to lower China's energy consumption per unit of GDP by 20% by 2010 compared with its 2005 level. Under a medium to long-term sustainable development plan, the share of sustainable energies in the overall energy mix will increase to 10% by 2010 and to 15% by 2020. Before the Copenhagen conference, China indicated that it was expecting the United States and Europe to commit to reducing their emissions by 40% and to devote 1% of their GDP to technology transfer towards developing countries by 2020. The Bush Administration used the argument that 'the American way of life is not negotiable' to justify the refusal of the United States to adhere to the Kyoto Protocol. Today, the United States returns to the discussion table in a more open frame of mind. The administration of Barack Obama has decided to become more involved and cooperate more with China and India on climate change. In late June, the American president succeeded in getting his climate change bill through the US House of Representatives. The climate bill, which is still up before the Senate, aims to reduce GHG emissions (particularly CO{sub 2}) by 17% before 2020 compared with the 2005 level. It also promotes the development of clean energies and provides for the creation of a cap and trade emissions trading system. Under this system, emissions allowances are either sold or given to the most vulnerable industries. The sales revenue would be used to fund the development of clean energies, among other things. The EU-15 member states are close to reaching the targets set at Kyoto. What about EU-27 member states? At the late September summit in Pittsburgh, the G20 countries, which include the most industrialized countries as well as the large emerging countries of China, India and Brazil, agreed to phase out subsidies for fossil energy sources over the medium term, but without setting a deadline. According to the press release issued at the end of the summit, 'inefficient fossil fuel subsidies encourage wasteful consumption, distort markets, impede investment in clean energy sources and undermine efforts to deal with climate change'. G20 members also intend to step up their efforts to reach an agreement on dangerous climate change at the upcoming conference in Copenhagen

  12. The new challenges of the energy policy; Quels nouveaux defis pour la politique energetique

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-05-01

    Political uncertainties, reserves depletion, increase of the energy consumption and environmental impact are many reasons to wonder on our the future choices in matter of energy (consumption habits, energy conservation). In this context the meeting, which took place at Paris the 18 march 2003, aims to wonder on the increasing energy demand, the evolution of the consumption and production habits and the decision making. The full text of the presentations and allocution are provided. (A.L.B.)

  13. La politique de financement public du sport au Cameroun. Quels enjeux pour quelle politique fiscale ?

    Directory of Open Access Journals (Sweden)

    Obam Richard Evina

    2016-01-01

    Pour ce faire, cinq paliers doivent être successivement franchis. Le premier serait constitué par l'adoption d'une loi sur l'organisation et la promotion des activités physiques et sportives au Cameroun ayant comme caractéristiques essentielles l'obligation de constitution des clubs en société anonyme à objet sportif (SAOS avant toute affiliation à une Fédération et la création d'une Direction Nationale de Contrôle et de Gestion (DNCG ; Le deuxième palier consisterait dans l'opérationnalisation de la loi de 2006 sur le partenariat public-privé qui permettrait aux entreprises privées d'intervenir dans le domaine de la construction des infrastructures sur le modèle Build-operate-transfer (BOT ; Le troisième palier serait l'adoption d'un dispositif fiscal incitatif pour le mécénat, le sponsoring, le bénévolat, le marchandising et les droits télé ; Enfin, outre la dynamisation de la coopération internationale dans la perspective de diversification des financements viendrait parachever cette architecture de reconstruction du mouvement sportif camerounais.

  14. Refrigeration companies in front of the sustainable development. Which stakes?; Les entreprises du froid face au developpement durable. Quels enjeux?

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    These proceedings summarize the presentations given at the sustainable development forum organized by the French association of refrigeration (AFF) in October 2004. Three complementary approaches are presented: - the one of the refrigeration industry as actor of the sustainable development and which has to find the balance between the ecological, economical and social concerns (Afnor, Ademe, IIF, BMJ company, Inter-ministerial greenhouse effect mission); - the one of manufacturers and fitters, the task of whom is to design and sustain the development of refrigerating appliances (Carrier Transicold, Electrolux, ITF design office, Sovimev company); - and the one of users, who integrate the refrigeration use constraints in their sustainable development approach (Dalkia, Air Liquide, Casino, Armoric company, Sofrica). The density and quality of these presentations make these proceedings the basis of a practical guidebook about sustainable development applied to refrigeration. (J.S.)

  15. La reconnaissance de l'eau comme patrimoine commun : quels enjeux pour l'analyse économique ?

    OpenAIRE

    Olivier Petit; Bruno Romagny

    2009-01-01

    Since the seventies, two different currents, the "market-based approaches" and the "patrimonial management", trigger the international water policy debate and have further impacts on a local scale. The goal of this article is to analyze the theoretical turmoil generated by the recognition of water as a common heritage. We first return on the Common Pool Resources (CPR) theory and on one of its extensions: the patrimonial mediation and subsidiarity management. We will present then the main les...

  16. Petits planteurs et construction territoriale en Afrique noire : quels enjeux pour les cultures pérennes ?

    Directory of Open Access Journals (Sweden)

    Charlery De La Masseliere Bernard

    2001-11-01

    Full Text Available Les termes de référence de cette conférence ont rappelé l’importance majeure des cultures pérennes pour de nombreux pays en développement. Cette importance n’est pas seulement économique. Elle prend son sens au sein de l’évolution d’un système global où les exigences écologiques de la plante ainsi que les aptitudes bio-climatiques et pédologiques des milieux tropicaux interfèrent avec les conditions historiques du marché mondial, de la formation de sociétés paysannes ouvertes à l’innovation et de la destruction/reconstruction de l’État. Le mouvement d’introduction et de développement des cultures pérennes peut être considéré comme une véritable innovation, voire un fait de civilisation, inscrit dans une longue durée et dont on peut repérer les moments et lieux de l’intégration. Histoire souvent décrite, selon les pays, comme plus ou moins exemplaire, ayant apporté des transformations irréversibles de la société, jusqu’à produire des modèles spécifiques, comme au Kenya le modèle du « petit producteur capitaliste » de la Province centrale, des identités individuelles, à travers le statut de « planteur » comme en Côte d’Ivoire, ou des identités collectives, à travers la proclamation ethnique, comme en pays Bamileke. Réfléchir aujourd’hui sur l’avenir des cultures pérennes dans un contexte de crise nous place bien au cœur des temporalités, complexes, qui animent les éléments du système. François Ruf a bien montré pour le cacao comment la conjonction de facteurs fait passer une région de production, souvent en un très court laps de temps, de l’âge d’or à la crise, comment le transfert spatial des foyers de production vers de nouvelles régions, par une sorte d’accumulation extensive à l’échelle mondiale, a d’une certaine façon occulté, à l’échelle locale ou régionale, les principes élémentaires qui déterminent le cycle de l’innovation. Faut-il rappeler que les cultures pérennes sont des cultures d’exportation, rarement consommées sur le marché national, et que c’est donc de façon indirecte qu’elles participent aux impératifs d’une économie agricole à priorité vivrière. Cela pour dire que l’intégration de ces cultures dans les systèmes de production prend toute sa dimension, son sens - en termes d’innovation - non pas dans leurs procédures techniques ou commerciales propres, particulières, sectorielles, qui déterminent le fonctionnement de la filière, mais dans le rôle qu’elles jouent ou qu’elles ont joué dans le changement social au sens large. Cela pour dire avec plus de précision que l’avenir à long terme des cultures pérennes ne dépend pas d’abord d’un « raffinement » qui serait apporté aux conditions techniques et commerciales du secteur - en termes d’amélioration des rendements, de la compétitivité de la filière, etc. - mais bien de la façon par laquelle elles peuvent ou non accompagner ou relancer un processus plus large de recomposition sociale et territoriale rendu nécessaire par l’épuisement du modèle de développement. En ce sens, on peut dire que l’adoption des cultures pérennes n’a été qu’un préalable, un prélude ou un prétexte à des changements sociaux et territoriaux qui constituent la véritable innovation. La question peut être posée de façon plus brutale, pour l’Afrique du moins. Le développement des cultures pérennes a-t-il acquis une certaine autonomie par rapport à l’évolution des rapports de force au sein des sociétés, ou reste-t-il intrinsèquement subordonné à un moment particulier de leur histoire, rendu aujourd’hui caduc par l’étirement d’une crise paysanne durable ? Cette dernière proposition montre la difficulté dans laquelle nous nous trouvons dans la mesure où elle signifierait que, quelles que soient les améliorations apportées au fonctionnement du marché, la « durabilité » que celles-ci apporteraient aux cultures pérennes ne serait que temporaire et résiduelle, par rapport à des dynamismes qui trouveraient leur ressort ailleurs, dans d’autres types de production. Pour explorer cette question, il paraît utile de revenir sur les conditions du succès des cultures pérennes, mais aussi sur les limites de sa propre logique, et de les replacer dans un certain nombre de transformations qui apparaissent aujourd’hui comme déterminantes. On fera l’hypothèse qu’un nouvel ordre social et territorial est en train de se forger dans le cadre contraignant d’une dérive économique et financière - sinon sociale - qui exacerbe la compétition pour l’accès aux ressources.

  17. Energy policy: challenges of a global vision; Politique energetique: les enjeux d'une vision globale

    Energy Technology Data Exchange (ETDEWEB)

    Destot, Michel [ed.] [Depute de l' Isere, Assemblee Nationale, Paris (France)

    2000-02-18

    This is the proceedings of the 2. parliamentary gathering on energy held on 14 October 1999. The document presents the talks by Mr Michel Destot (as special rapporteur of the Industry's budget in National Assembly) and Laurent Fabius, President of National Assembly, and Jean-Claude Gayssot, Minister of Equipment, Transport and Dwelling, at the opening session, three round tables, the colloquium synthesis and the closing session. The round tables addressed the following issues: - 1. International and long-term approach guided predominantly by energy demand; - 2. Energy solutions in the struggle against greenhouse effect; - 3. Challenges of opening the European energy market (internationalization and decentralization). At the first round table, Yves Martin, President of the technical section of General Council of Mines, structured his introductory report emphasizing the specific issues of three time horizons: the present, characterized by abundant energy offer; the horizon of 10 to 20 years, that of the energy suppliers which is orienting their investments; the horizon of more than half a century, corresponding to responses of far-reaching actions imposed by energy demand and which must be the object of governments' policies. Jean-Yves Le Deaut, deputy of Meurthe-et-Moselle discussed the risks of climate change, resources' exhaustion, nuclear power and the issue of developing the renewable energies. The problems raised by energy demand by the year 2050 to met the needs of an earth population of 9 billions were mentioned by Philippe Trepant, the president of French Union of oil industries. Energy problems from a globalization standpoint were discussed also by Benjamin Dessus, Director of Ecodev program of CNRS. Policy in the field of mastering greenhouse gas releases was mentioned in the talk by Michel Mousel, president of Inter-ministerial Mission for greenhouse effect. In the frame of 2. round table questions relating to energy management, renewable, gas, and nuclear energies were addressed by a number of deputies and officials and representatives from ADEME, Framatome, Paris University and Union for renewable energies. Finally, at the 3. round table, focusing the economic aspects of the internationalization and decentralization of the energy market, several participants discussed questions related to integration, securing the supplies, access to power distribution grids, role of public service, energy market evolution, etc. In his summarizing talk Mr Michel Destot underlined the significant progress made in achieving a genuine French energy culture, able to ensure a long-term, diverse and balanced energy policy covering, at the same time, the environmental, economic, and employment components.

  18. Le Kivu dans la guerre : acteurs et enjeux

    Directory of Open Access Journals (Sweden)

    Roland Pourtier

    2009-01-01

    Full Text Available La guerre en RDC témoigne du réveil d’une guerre qui couvait depuis des années. Au-delà des réactions émotionnelles que suscitent les images, toujours recommencées, des victimes civiles fuyant les zones de combat, les pillages et les viols perpétrés par toutes les forces armées impliquées dans le conflit ou celles du recrutement forcé d’enfants soldats, se posent des questions de fond. Quels sont les acteurs d’un conflit dont la durée et les rebondissements après chaque phase d’accalmie signifient qu’il est l’expression de tensions structurelles ? Enchâssé dans l’entité géopolitique des Grands Lacs, le Kivu est partie prenante, d’un système régional de conflits. La guerre qui s’y déroule constitue une sérieuse entrave à la reconstruction de la RDC, et une menace pour la stabilité de toute la région : aujourd’hui plus que jamais le Kivu est la poudrière de l’Afrique Centrale. Cet article est un état des lieux et des enjeux d’un conflit ancien qui connaît depuis janvier 2009 une certaine accalmie, mais pour combien de temps ? Quels en sont les acteurs internes ? Quelles sont les forces externes qui interfèrent dans un conflit nourri de facteurs aggravants qui participent à la fois de la dialectique ethnique, des intérêts économiques contradictoires et d’une situation démographique caractérisée par des densités élevées.Once again, it’s war time in Kivu. In spite of the United Nation’s mission (MONUC that tries to put an end to the turmoil in the eastern part of the Democratic Republic of Congo, an other conflict has popped up in the heart of the African continent. In this region thousands of people have been killed and millions of others removed from their birthplace by the permanent troubles that have prevailed since the burst of violence occurred in the Great lakes regions in 1994. In the mean time, the FAR, leaded by Paul Kagame has won the civil war in Rwanda, and the core

  19. Estimation of the energy needs; Estimation des besoins energetiques

    Energy Technology Data Exchange (ETDEWEB)

    Ailleret, [Electricite de France (EDF), Dir. General des Etudes de Recherches, 75 - Paris (France)

    1955-07-01

    The present report draws up the balance on the present and estimable energy consumption for the next twenty years. The present energy comes mainly of the consumption of coal, oil products and essentially hydraulic electric energy. the market development comes essentially of the development the industrial activity and of new applications tributary of the cost and the distribution of the electric energy. To this effect, the atomic energy offers good industrial perspectives in complement of the energy present resources in order to answer the new needs. (M.B.) [French] Le present rapport dresse le bilan sur la consommation energetique actuelle et previsionnelle pour les vingt prochaines annees. L'energie actuelle provient principalement consommation de charbon, de produits petroliers et d'energie electrique essentiellement hydraulique. l'evolution du marche provient essentielement du developpement l'activite industriel et de nouvelles applications tributaire du cout et de la distribution de l'energie electrique. A cet effet, l'energie atomique offre de bonne perspectives industrielles en complement des sources actuelles energetiques afin de repondre aux nouveaux besoins. (M.B.)

  20. EL NÍQUEL EN SUELOS Y PLANTAS DE CUBA

    OpenAIRE

    Olegario Muñiz Ugarte; Mirelys Rodríguez Alfaro; Alfredo Montero Álvarez; Juan Estévez Álvarez; Adriana M. de Aguiar Accioly; Clístenes W. Araujo Do Nascimento

    2015-01-01

    El contenido de Níquel (Ni) en el suelo es muydependiente del material parental que le dio origen. Por otraparte, el Ni existente en su superficie, puede ser tambiénun reflejo de su contaminación. La literatura internacionalseñala valores de Ni total en los suelos del mundo entre0,2 y 450 mg kg-1. Se conoce en la actualidad, que aunqueel Ni es esencial para las plantas superiores, su exceso enforma disponible puede ser tóxico, por lo que se consideraun Metal Pesado. En Cuba las encuestas real...

  1. Véhicules connectés et autonomes : quels enjeux technologiques, juridiques et de sécurité routière ?

    OpenAIRE

    Hautiere , Nicolas; Tattegrain , Hélène; Guilbot , Michèle

    2017-01-01

    De nouveaux types de véhicules équipés de technologies ultra sophistiquées sont en cours de développement et pourraient révolutionner nos déplacements. En offrant une assistance à la conduite voire en déléguant la conduite à la machine, ces véhicules permettraient, à terme, lorsqu'ils circuleront en autonomie, d'améliorer la sécurité routière. Mais la coexistence de l'homme et de la machine pose de nombreuses questions, technologiques, juridiques et de sécurité. Connected and autonomous ve...

  2. Energy policy conference on the technical-economical stakes of hydrogen as future energy vector; Conference de politique energetique sur les enjeux technico-economiques de l'hydrogene comme vecteur energetique

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-01-01

    This document is the report of the conference meeting jointly organized by the French general plan commission and the general direction of energy and raw materials on the technical-economical stakes of hydrogen as future energy source, and in particular of hydrogen fuel-cells for cogeneration and vehicle applications: 1 - presentation of the general context: status of the hydrogen industry, French R and D and industrial actors, international status; 2 - competition or association with fossil fuels: which opportunities for hydrogen, recall of the 2020 and 2050 energy prospects, impact of hydrogen on climate change, energy efficiency reference of vehicles, CO{sub 2} emissions 'from the well to the wheel' for the different energy sources, perspectives of hydrogen fuels; 3 - main results of the study carried out by the CEREN on the prospects of stationary fuel cells in France: description of the study, concrete case of a 500 beds hospital, economic and environmental conclusions. The transparencies corresponding to the 3 points above are attached to the report. (J.S.)

  3. Mobility energy label: An indicator for a sustainable city; Les etiquettes energetiques de mobilite: Un indicateur pour la ville durable

    Energy Technology Data Exchange (ETDEWEB)

    Flety, Yann; Antoni, Jean-Philippe; Vuidel, Gilles; de Sede-Marceau, Marie-Helene

    2010-09-15

    Perspectives of energy consumption reduction linked to global warming are bringing a desire for actions relating to the mastering and the improvement of energy efficiency. In this context, from the French example of greater Besancon (Communaute d'Agglomeration du Grand Besancon (CAGB)), the research presented here wants to define an energy indicator useful to planners called 'Territory energy label': to measure how the urban area is situated energy wise in terms of the daily mobility of its inhabitants, the behaviour of whom is looked at in a prescriptive manner. [French] Les perspectives de reduction des consommations energetiques en lien avec le rechauffement climatique se traduisent par une volonte d'actions en matiere de maitrise et d'amelioration de l'efficacite energetique. Dans ce contexte, a partir de l'exemple francais de la Communaute d'Agglomeration du Grand Besancon (CAGB), la recherche presentee vise a definir un indicateur energetique utile aux amenageurs intitule 'etiquette energetique Territoriale' : il s'agit de mesurer comment 'se situent energetiquement' les differents espaces que regroupent une meme aire urbaine du point de vu des mobilites quotidiennes de ses habitants, dont le comportement est apprehende de maniere normative.

  4. Electricity and energy policy: French specificities and stakes in the European framework; Electricite et politique energetique: specificites francaises et enjeux dans le cadre europeen

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-15

    The present day context of liberalization of European power markets and increase of energy prices raises the question of the competitiveness of the French economy: what type of supply and what technological trend would allow to relax this constrain? It is therefore the overall main trends of the French energy policy that should be reexamined in the broader framework of Europe. This is the aim of this document. It presents, first, the present day organization of the French power market and the recent changes that have followed its opening to competition. Then, it describes the evolutions since the first petroleum shock and the share given to electricity in the French energy mix, the technological choices that have led to the present day domination of nuclear energy in the power generation means. Finally, this policy and its perspectives is compared to the main European trends in the domain of energy security, environment protection and market liberalization. It appears, in particular, that the choices made by France in the domain of electricity (demand mastery efforts, large share given to electricity, preponderance of nuclear power, development of renewable energy sources, in particular hydroelectric power) have limited its energy bill and enhanced its energy independence. Also, all energy sources considered, they have led to a low level of CO{sub 2} emissions with respect to other developed countries. (J.S.)

  5. Electricity and energy policy: french specificities and challenges in the european framework; Electricite et politique energetique: specificites francaises et enjeux dans le cadre europeen

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-11-15

    In the today context of the electric power european market deregulation and the increase of the energy prices, the energy policy must change. The increase of the energy prices makes wonder the question of the competitiveness of the french economy: what type of supplies and which technological orientations will allow to reduce the constraints. After a presentation of the today electric power french market and the recently modifications bond to the deregulation, this note aims to describe the evolutions, since the first petroleum crisis, of the place given to the electric power in the energy policy, as the technological choices explaining the today structure he electricity production, characterized by the major part of the nuclear. Then the energy policy in matter of the electric power is discussed in the european context, to present the choices impacts facing the european objectives of energy security, environment and market liberalization. (A.L.B.)

  6. AREVA Technical Days (ATD) session 1: Energy outlook and presentation of the Areva Group; AREVA Technical Days (ATD) session 1: enjeux energetiques et presentation du groupe AREVA

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    These technical days organized by the Areva Group aims to explain the group activities in a technological and economic point of view, to provide an outlook of worldwide energy trends and challenges and to present each of their businesses in a synthetic manner. This first session deals with energy challenges and nuclear, public acceptance of nuclear power, mining activities, chemistry activities, enrichment activities, fuel assembly, reactors and services activities, nuclear measurements activities, reprocessing and recycling activities, logistics activities and connectors activities. (A.L.B.)

  7. Les systèmes alimentaires alternatifs face aux enjeux sanitaires

    OpenAIRE

    Touzard, Jean-Marc

    2012-01-01

    L’objet de la communication est de montrer comment la coexistence et la combinaison d’une diversité de système alimentaires est un trait de la globalisation et joue sur les enjeux, les pratiques, et les régulations sanitaires.

  8. Energy policy and challenges: which part for the nuclear energy; Politique et defis energetiques: quel role pour l'energie nucleaire?

    Energy Technology Data Exchange (ETDEWEB)

    Bouchard, J

    2004-07-01

    This document provides many data and charts on the energy domain: energy consumption, energy demand, the reserves, the climatic changes, the renewable energies, the energy cost, the radioactive wastes management, the new nuclear technology. (A.L.B.)

  9. The influencing factors of energy poverty in rural Cameroon; Les determinants de la pauvrete energetique en milieu rural au Cameroun

    Energy Technology Data Exchange (ETDEWEB)

    Kamdem, Maxime; Edzengte, Joseph

    2010-09-15

    The objective of this study is to assess the influencing factors of energy poverty in rural Cameroon. The method used is in two stages: the first stage is a statistical analysis that has allowed to determine the level of energy poverty in rural areas, which is 7.5%. The second stage assesses the influencing factors of this poverty type. The results show that the revenue impacts on energy poverty, as well as the size of the household, in which the arrival of an additional person increases by 1.16% the chances that the household will suffer from energy poverty. [French] L'objectif de cette etude est d'evaluer les determinants de la pauvrete energetique en milieu rural au Cameroun. La methode mise en oeuvre procede en deux etapes : la premiere est une analyse statistique qui a permis de determiner le seuil de pauvrete energetique en milieu rural, qui se situe a 7,5%. La deuxieme etape evalue les determinants de ce type de pauvrete. Les resultats indiquent que le revenu explique la pauvrete energetique, de meme que la taille du menage dont l'arrivee d'une personne supplementaire accroit de 1,16% les chances de ce menage d'etre pauvre sur le plan energetique.

  10. Donner un sens au nom du festival de la ville1 Les enjeux de la ...

    African Journals Online (AJOL)

    monopolise, ces enjeux concernent le contrôle étroit de la vie politique locale. ... à ces sociétés, selon laquelle les liens d'appartenance ne peuvent être conçus ... leur gestion politico culturelle, selon des modalités relatives au processus d' ... La commission était composée du Délégué, du Président de la Municipalité, du.

  11. Jeux et enjeux autour de l'insertion professionnelle des jeunes ...

    African Journals Online (AJOL)

    S'inscrivant dans une certaine logique d'action, ces stratégies sont développées autant sur les plans physique, que métaphysique. Mots clés : Jeux, enjeux, insertion professionnelle. Graduates of higher education in general, and those of professional schools of the Université Abomey-Calavi (UAC) in particular, are facing ...

  12. Donner un sens au nom du festival de la ville Les enjeux de la ...

    African Journals Online (AJOL)

    L'objet de ce papier est d'analyser, à partir de l'observation d'un festival local, les enjeux multiples de la reconstruction des liens d'appartenance pour des populations rurales, qui se trouvent engagées - du fait de leur urbanisation récente- dans un processus de réorganisation et de renégociation de ces liens et des ...

  13. Libéralisation du commerce des biens et services TIC : enjeux et ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Libéralisation du commerce des biens et services TIC : enjeux et implications pour la mise en oeuvre de politiques publiques en Afrique de l'Ouest. En Afrique de l'Ouest, les entreprises du secteur privé des technologies d'information et de la communication (TIC) ont démontré leur capacité à créer des emplois et à stimuler ...

  14. Les difficultés de la replantation. Quel avenir pour le cacao en Côte d’Ivoire ?

    Directory of Open Access Journals (Sweden)

    Ruf François

    2001-11-01

    Full Text Available La conférence internationale sur le thème « Quel avenir pour les cultures pérennes ? » est née de deux préoccupations. La première recouvre le champ des difficultés de la replantation, difficultés techniques, économiques mais aussi environnementales, sociales et politiques : comment replanter 1 ? La seconde est la baisse des cours, probablement structurelle, de la plupart des matières premières agricoles, notamment de celles produites par des cultures pérennes. Si les prix restent aussi bas de façon aussi durable, pourquoi replanter ? De même qu’il est toujours de bon aloi d’acheter des actions quand la bourse s’écroule, les économistes recommandent de planter quand les cours des matières premières sont à leur plancher. Toutefois, si des centaines de milliers d’hectares sont plantés par des producteurs qui anticipent une remontée des cours, celle-ci peut alors être fort retardée. Cette capacité à anticiper un retour à des prix élevés est ainsi une des causes du prolongement de la phase des très bas prix du cacao jusqu’en 2001, ce qui semble bien relever d’un échec du marché 2. Le pourquoi et le comment de la replantation sont bien indissociables. Face aux enjeux, de nombreux pays détenteurs du patrimoine « cultures pérennes tropicales » ne manquent-ils pas d’une véritable politique de replantation prenant acte des changements nécessaires dans les conditions de production, se remettant en cause, tout en faisant face aux difficultés à interpréter les marchés ? Les problèmes de replantation ne peuvent se surmonter qu’à partir d’une compréhension des processus en œuvre, sur le terrain, en commençant par les décisions des producteurs. Les exemples, les études de cas, par village, par région, restent donc des fondamentaux pour une réflexion globale, pour une anticipation des problèmes, une action nationale, voire internationale, sur la replantation. En même temps, la question de

  15. Quels usages de la bibliotheque au Maroc 

    Directory of Open Access Journals (Sweden)

    Anouk Cohen

    2008-10-01

    Full Text Available Officine de l’âme et de l’esprit, la bibliothèque représente ce lieu où se forme un patrimoine, individuel ou collectif, et où s’élabore une construction, personnelle ou non, référant à une histoire, elle-même relative à une mémoire propre. Afin de cerner ce qu’il en est au Maroc, nous interrogerons, sous un angle ethnologique, le rapport des lecteurs à leur bibliothèque, qu’elle soit publique ou privée, afin non seulement de comprendre quels sont les livres appelés à constituer le patrimoine dont elle sera le dépositaire : à faire patrimoine, mais également cerner les représentations qui lui sont attachées, la mémoire à laquelle elle réfère, les usages qui en découlent, et le rôle qui lui est attribué. Alors que la bibliothèque publique fait l’objet d’usages limités et strictement fonctionnels de la part de ses usagers, la bibliothèque privée donne lieu à davantage d’appropriations personnelles. Nous tenterons de comprendre pourquoi les pratiques attachées à la bibliothèque sont davantage, voire essentiellement, retranchées dans le domaine privé, en interrogeant les usages réels, c'est-à-dire privés, de la bibliothèque. On observera que les bibliothèques privées sont dépositaires d’un patrimoine traditionnel tirant son essence de l’histoire arabe et d’une mémoire de l’Antiquité. Un patrimoine, nous le verrons, davantage véhiculé par l’esthétique propre aux ouvrages qui le portent que par leur contenu. A cette fonction esthétique de la bibliothèque s’ajoute un rôle distinctif, chaque individu en effet, au travers de sa bibliothèque racontant son histoire relative à une mémoire singulière.

  16. Le financement de l'éducation dans les collectivités locales, quels ...

    African Journals Online (AJOL)

    Le financement de l'éducation dans les collectivités locales, quels défis ? Marie Elisabeth Dembélé. Abstract. This article aims to analyse the support provided by the state to local collectivities in Mali, to target the expenditure categories included in the funding and observe their appropriation by the beneficiaries of education ...

  17. Irrigation, santé et sécurité alimentaire en Afrique : quels liens ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2011-01-12

    Irrigation, santé et sécurité alimentaire en Afrique : quels liens ? January 12, 2011. Gérard Parent, Jean-Noël Poda, Noël-Marie Zagré, Renaud de Plaen, and Georges Courade ... Preserving the health of the Rio de la Plata ... set up by researchers from Uruguay and Canada, is improving the management and conservation.

  18. « Questions de Sciences, Enjeux Citoyens » : à la recherche de l’expression citoyenne

    OpenAIRE

    Blémus, Nicolas

    2011-01-01

    Mis en place en Île-de-France en 2009, le dispositif « Questions de Sciences, Enjeux Citoyens » permet à la population, toutes catégories sociales confondues, de débattre sur les enjeux de société liés à la recherche et à la technologie : le responsable du projet revient sur la méthodologie et les protocoles développés, les savoir-faire mobilisés et dresse un premier bilan de l’opération. Set up in the ‘Île de France’ (Paris region) in 2009, the programme Questions on Sciences, Citizen sta...

  19. Les enjeux de la pollution de l'air des transports

    OpenAIRE

    Joumard , Robert

    2003-01-01

    International audience; Au vu notamment de l'évolution de la qualité de l'air telle que mesurée en France et dans l'Union Européenne au cours des dix dernières années, de l'évolution des émissions de polluants atmosphériques des transports routiers en France, telle que calculée sur la période 1970-2020, et de l'évolution de la perception sociale du thème de la pollution de l'air, on évalue quels polluants sont les plus problématiques aujourd'hui et demain. Il s'agit en tout premier lieu du ga...

  20. Energy policy: the stakes of a global overview. Synthesis of the afternoon works; Politique energetique: les enjeux d'une vision globale. Synthese des travaux de l'apres-midi

    Energy Technology Data Exchange (ETDEWEB)

    Destot, M

    1999-10-01

    This document is a report of the debates that took place at the French national assembly in October 1999 concerning the French energy policy and more particularly the new electricity and gas directives, the energy choices, the development of renewable energies, the building of the future EPR European Pressurized water reactor, the development of more efficient transportation systems, the reduction of air pollution and the fight against the greenhouse effect, and the mastery of energy consumptions. This synthesis of the afternoon works reports on the point of views exchanged during the last round table of the day about the stakes of the opening of the European energy market (internationalization and decentralization of the electricity and natural gas markets). (J.S.)

  1. Influencia sobre el extractable de níquel de los minerales oxidados del yacimiento Punta Gorda

    Directory of Open Access Journals (Sweden)

    Antonio R. Chang-Cardona

    2014-12-01

    Full Text Available El propósito fue validar, a escala industrial, una metodología para períodos largos en una loza de 8 hornos en la empresa productora de níquel Comandante Ernesto Che Guevara, con el fin de crear una base de datos de producción confiable para su procesamiento estadístico y demostrar la influencia del contenido de los principales minerales oxidados sobre el extractable de níquel y la tendencia en el comportamiento del extractable de cobalto. Se demostró, mediante experimentos, durante tres meses de monitoreo, la efectividad del software COMPRAC para obtener la composición racional de 100 kg de varios tipos de mena laterítica que entran a los hornos de reducción. A partir de la base de datos creada se obtuvo, por primera vez, las gráficas que reflejan la influencia del contenido de los principales minerales sobre los extractables de níquel y de cobalto; en el caso del níquel con suficiente sensibilidad y confiabilidad para la toma de decisiones operacionales eficaces en el circuito tecnológico Mina-Preparación de Mineral-Hornos de Reducción

  2. La Mycorhize à arbuscules : quels bénéfices pour l'homme et son ...

    African Journals Online (AJOL)

    La Mycorhize à arbuscules : quels bénéfices pour l'homme et son ... et quantitative de la production végétale mais aussi pour une gestion et une remédiation ... Mycorrhizal symbiosis, and specifically arbuscular mycorrhization, which occurs ...

  3. Analysis of the energy efficiency of the transport system in Algeria; Analyse de l'efficacite energetique du systeme de transport en Algerie

    Energy Technology Data Exchange (ETDEWEB)

    Hamdani, Sid Ahmed

    2010-09-15

    The objective of this communication is analyze the energy efficiency of the transport system in Algeria and to show the areas of possible rationalization in this sector. Our approach is to analyze the existing configuration of the sector and its impact on energy consumption, by developing a sectional model Bottom Up, where the transport park has been modified by the means used. We have shown that the potential to improve the transport system energy efficiency is important and have recommended some options aimed at the sector organisation and aimed at increasing the relative part of transport systems to make it more energy efficient. [French] L'objectif de cette communication est d'analyser l'efficacite energetique du systeme de transport algerien et de montrer les gisements de rationalisation possibles dans ce secteur. Notre approche consiste a analyser la configuration existante du secteur et son impact sur la consommation d'energie, en elaborant un modele sectoriel Bottom Up, ou le parc de transport a ete desagrege par moyen utilise. Nous avons montre que le potentiel d'amelioration de la performance energetique du systeme de transport est important et avons recommande quelques options ciblant l'organisation du secteur et visant a augmenter la part relative de moyens de transport plus efficace energetiquement.

  4. Développement professionnel en PHP quels frameworks s'offrent aux entreprises ?

    OpenAIRE

    Ehrbar, Jérôme; Hauri, Rolf

    2009-01-01

    Les frameworks PHP sont des outils aidant à la réalisation d’une application. Le but de ce travail était de déterminer quels frameworks les entreprises peuvent-elles choisir. Il commence par une sélection de frameworks PHP existant sur le marché. Un ensemble de critères a été définis afin de les évaluer. Sur la base de cette analyse, certains frameworks ont été sélectionnés dans le but de réaliser une petite application avec chaque framework. Ainsi, le lecteur voit les différences de façon pr...

  5. REMOCIÓN DE COBRE Y NÍQUEL POR INTERCAMBIO CATIÓNICO CON UNA ZEOLITA NATURAL

    Directory of Open Access Journals (Sweden)

    Arnoldy Estupiñan

    2010-10-01

    Full Text Available Se empleó la zeolita natural clinoptilolita, para remover cobre y níquel de aguas residuales de una industria de galvanotecnia. La capacidad de intercambio determinada para la zeolita transformada al estado homoiónico sódico, fue de 0,794 meq/g para cobre y 0,447 meq/g para níquel. Se realizaron ensayos en cochada y en columna, alcanzando éste último un mayor acercamiento al equilibrio. En los ensayos de regeneración, la zeolita sódica concentró el cobre hasta 23,5 veces con respecto al valor que presenta en los enjuagues de los baños de recubrimiento en medio ácido, mostrando su potencialidad para usarla en el tratamiento de estos residuos, por su efectividad y bajo costo.

  6. Revestimento de Níquel Depositado pela Soldagem MIG e MIG com Arame Frio

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Mendes da Mota

    Full Text Available Resumo: Este artigo apresenta um estudo das características operacionais, geométricas e microestruturais de soldas MIG e MIGAF (MIG com arame frio aplicadas no revestimento de chapa de um aço AISI 1020, com uma superliga de níquel ER NiCrMo-4, tipo Hastelloy 276C. A soldagem foi automatizada, na posição plana, e realizada por uma fonte eletrônica em CC+ com aquisição instantânea dos oscilogramas de corrente e tensão de soldagem. As variáveis de entrada foram às velocidades do arame eletrodo e do arame frio, e a velocidade de soldagem. Foram avaliadas a operacionalidade dos processos e o efeito da energia de soldagem sobre as características geométricas (reforço e largura, diluição, microestrutura e microdureza do revestimento. Os resultados indicaram um bom desempenho operacional, a ausência de defeitos nos passes isolados e nos revestimentos para as soldagens com MIGAF. Além disso, constataram-se menores níveis de diluição.

  7. Quebec energy development in a sustainable development context; Le developpement energetique du Quebec dans un contexte de developpement durable

    Energy Technology Data Exchange (ETDEWEB)

    Laplatte, Benjamin; Bourque, Francis; Granger, Francois P.

    2010-09-15

    Quebec is a net importer of oil and it is clear that the reduction of its dependence with regards to hydrocarbons must be a main preoccupation. Moreover, the energy consumption per habitant of Quebec is higher than that of the majority of the other developed countries. This analysis looks at the choice on offer to the society of the province of Quebec, in terms of energy resources and technologies of today and tomorrow, in a context of sustainable development. [French] Le Quebec est un importateur net de petrole et il est clair que la reduction de sa dependance a l'egard des hydrocarbures doit etre une preoccupation de premier plan. De plus, la consommation energetique par habitant du Quebec est plus elevee que celle de la majorite des autres pays developpes. La presente analyse adresse les choix qui s'offrent a la societe quebecoise, en matiere de ressources et de technologies de l'energie d'aujourd'hui et de demain, dans un contexte de developpement durable.

  8. Od polityki i teorii do literatury. Wokół „Théorie d'ensemble" grupy Tel Quel

    Directory of Open Access Journals (Sweden)

    Adam Dziadek

    2007-02-01

    Full Text Available This text aims at a description of the famous manifesto published by the group Tel Quel in France in 1968. The author gives a short analysis of chosen texts by Michel Foucault, Jacques Derrida, Roland Barthes and particularly Julia Kristeva. The analysis shows important links between politics and literary theory of the Tel Quel. It also shows the way that politics and theory (based on such intertexts as Marx, Freud and Lacan influenced new notion of the text, of the intertextuality and the others.

  9. Nouveaux pétroles : quel avenir ? Partie 2 New Oil: What's in the Future? Part Two

    Directory of Open Access Journals (Sweden)

    Boy De la Tour X.

    2006-11-01

    Full Text Available PaL'accroissement des prix de 1973 a rendu accessible toute une plage de pétroles chers, mais ces nouveaux pétroles soulèvent encore des problèmes techniques considérables et leur compétitivité économique a été très affectée par le retournement du marché pétrolier. Quel est l'état des technologies ? Que reste-t-il des ambitieux projets conçus dans les années 70 ? Aux horizons 2000/2010, quel sera l'impact de ces nouveaux pétroles, en terme de quantités et au plan stratégique ? Telles sont les questions auxquelles la présente étude tente de répondre. The increase in oil prices in 1973 made an entire range of expensive oil available, but this new oil still raises considerable technical problems, and its economic competitiveness has been greatly affected by the downturn in the oil market. What is the state of the art of existing technologies ? What remains of the ambitious projects conceived in the 1970s? As of 2000/2010, what will the impact of this new oil be in terms of amounts and from the strategic standpoint? These are the questions that the present study attempts to answer.

  10. Les plantes génétiquement modifiées en Afrique : enjeux et recherches

    Directory of Open Access Journals (Sweden)

    De Lattre-Gasquet Marie

    2002-11-01

    Full Text Available En ce qui concerne la politique sur plantes génétiquement modifiées, l’Afrique est un terrain de luttes d’influence et de débats. Les enjeux sont à la fois économiques, politiques et écologiques. Dans cet article, nous montrons que les biotechnologies végétales sont l’une des techniques, à combiner avec d’autres, qui pourraient permettre d’assurer la sécurité alimentaire et sanitaire de l’Afrique, et que les risques qu’entraîneront l’utilisation de cette technique doivent être soigneusement analysés. Nous présenterons ensuite la position des différents pays africains vis-à-vis des conventions internationales (propriété intellectuelle, biosécurité et commerce et nous caractériserons leurs politiques nationales et de recherche vis-à-vis des OGM.

  11. Corpus web 2.0 : quelques enjeux méthodologiques et épistémologiques

    Directory of Open Access Journals (Sweden)

    Sabrina Bevilacqua

    2016-12-01

    Full Text Available Nombre de défis d’ordre méthodologique et épistémologique s’imposent aujourd’hui à la recherche scientifique orientée vers le travail sur des corpus numériques. Certes, chaque plateforme virtuelle présente une écologie spécifique (Paveau, 2013a, 2013b qui oriente un rapprochement différent tant de l’objet que du corpus. Ainsi, l’environnement Facebook (FBK, une surface essentiellement multiforme suggère un regard qui puisse saisir son hétérogénéité sémiotique et énonciative. Dans ce travail, nous visons, d’abord, une redéfinition de la notion de corpus comme « matrice du sens » (Mayaffre, 2011 : 11 permettant de focaliser les enjeux scientifiques que la conception des corpus numériques issus du Web 2.0, notamment, de FBK, entraîne; ensuite, la description de certains concepts méthodologiques et épistémologiques fondamentaux — linéarité, technodiscours, sérialité, réticularité — aidant à l’élaboration ainsi qu’à la gestion de corpus FBK.

  12. Les reseaux de politique publique comme facteur d'influence du choix des instruments de politique energetique canadienne a des fins environnementales de 1993 a nos jours

    Science.gov (United States)

    Fathy El Dessouky, Naglaa

    Au cours de la derniere decennie, les modes de la gouvernance ont pris place dans un contexte totalement different de celui qu'ils avaient auparavant. Les gouvernements modernes se rendent compte qu'ils perdent de plus en plus leur capacite a elaborer et a gerer les changements d'une maniere autonome. Ainsi, les fonctions et les activites traditionnellement accomplies exclusivement par le gouvernement engagent de nos jours une gamme d'acteurs etatiques et non etatiques. A l'encontre du concept traditionnel de l'Etat controleur, la gouvernance contemporaine est ainsi devenue moins une question d'offre de service et davantage une gestion indirecte des reseaux de politique publique. Dans cette entreprise, les gouvernements contemporains, cherchant plus d'information, de soutien et de legitimite en matiere de formulation des decisions, ont besoin d'etablir des relations avec les divers groupes d'interet qui, a leur tour, voulaient plus de promotion et de protection en faveur de leurs interets a travers leur implication au processus de l'elaboration et de la mise en oeuvre des politiques publiques. Ainsi, l'approche des reseaux de politique publique represente aujourd'hui un courant considerable au sein du champ d'analyse des politiques publiques. Toutefois, les preoccupations des chercheurs pour cette approche, dans le domaine des politiques energetiques a des fins environnementales, semblent recentes, et les etudes realisees sont encore trop peu nombreuses. Au Canada, au debut des annees 1990, le gouvernement ainsi que plusieurs groupes d'interets, des differents secteurs energetique, industriel et environnemental, ont commence a intensifier leurs efforts pour s'attaquer au probleme du changement climatique d'origine energetique, genere surtout par le secteur de l'industrie. Au cours de la derniere decennie, la question touchant plutot le sujet du developpement energetique durable represente le plus important domaine des politiques publiques ayant surgi recemment dans

  13. La question de la nationalité des sportifs camerounais : enjeux et défis à l'aune de la globalisation

    Directory of Open Access Journals (Sweden)

    Engamba Philomène Alene

    2016-01-01

    Cette étude permettra d'analyser les enjeux et les implications de la ruse de l'Etat camerounais, en vue de gérer un conflit entre logiques juridiques et symboliques stato-nationales, et logiques de gain liées à la construction de la carrière internationale des sportifs. Mais également cette réflexion s'ouvre sur la nécessité de l'urgence d'une refondation du code de la nationalité camerounaise.

  14. Sport et éthique: enjeux et outils pour le marketing sportif - Sport and ethics: stakes and tools for marketing of sport

    OpenAIRE

    Emmanuel Bayle; Samuel Mercier

    2008-01-01

    (VF)Dans un contexte général d’une demande sociétale d’éthique, d’appel à la responsabilité sociale des entreprises et face aux attaques (dopage, violences, corruption…) que connaît aujourd’hui le mythe de l’éthique sportive, comment les organisations présentes dans le secteur du sport adaptent-elles leurs stratégies marketing ? Cet article propose une typologie des enjeux stratégiques de l’instrumentalisation de l’éthique sportive selon quatre types d’organisations. A partir de ce cadre conc...

  15. Estudio de la adsorción de cadmio, níquel y zinc sobre una bentonita natural y homoiónica de sodio

    Directory of Open Access Journals (Sweden)

    Germán Darío Silva Giraldo

    2010-09-01

    Full Text Available Se esmdió la adsorción de cadmio, níquel y zinc, en solución acuosa a 25 "C, sobre una bentonita procedente del Valle del Cauca, tanto en su estado natural como en su forma homoiónica de sodio.

  16. Energy transition and security: which voluntary codes? Energy efficiency: IEA, IEC and ISO dialogue. The European Commission's safety, solidarity and efficiency measures. Securing natural gas supplies and favoring cogeneration. Less energy consuming buildings: rework of the energy efficiency directive. Energy efficiency inside buildings: GDF Suez report; Transition et securite energetiques: quels codes volontaires? Efficacite energetique: dialogue AIE, CEI et ISO. Les mesures de securite, solidarite et efficacite de la commission europeenne. Securiser l'approvisionnement en gaz naturel et favoriser la cogeneration. Des batiments moins gourmands en energie: refonte de la directive sur la performance energetique. Efficacite energetique dans les batiments: GDF Suez au rapport (volontaire)

    Energy Technology Data Exchange (ETDEWEB)

    Tourneur, J.C

    2009-10-15

    This dossier gathers a series of short articles about energy security and efficiency in a context of policy transition. The first paper deals with the use of international standards to promote energy efficiency thanks to efficient public policies and private sector actions. This was the main topic of the mixed workshop organized by the International electrotechnics Commission (IEC) in spring 2009. The second paper presents the new strategic analysis of the European commission in the domain of energy which stresses on the '20-20-20' climate change proposals approved in December 2008. A new European action plan for energy security and solidarity defines 5 domains requiring an extra action to warrant a sustainable energy supply. The commission is also examining the challenges that Europe will have to face between 2020 and 2050. The third article treats of the security of natural gas supplies which represents a quarter of the European Union (EU) energy mix. The supply crises susceptible to occur may have serious economic and social consequences. Therefore, the EU must be prepared to warrant its security of supplies. Cogeneration allows the EU to stay close to its energy goals. Buildings play a key role in the realisation of the EU's energy saving objectives and fight against climate change. The new directive on buildings energy efficiency (2002/91/CE) will allow to exploit this potential of saving and to stimulate sustainable investment and employment as well. Finally, the publication of the second WBCSD (World business council for sustainable development) international report on buildings energy efficiency has led GDF Suez utility to reaffirm its commitment in favour of energy saving and efficiency. (J.S.)

  17. Desactivación de electrodos de oro modificados con hidróxido de níquel

    OpenAIRE

    Caram, Bruno Federico; Tucceri, Ismael Ricardo

    2016-01-01

    En este trabajo se estudió la modificación (desactivación) que sufre el proceso de transporte de carga en películas de hidróxido de níquel, sintetizadas electroquímicamente sobre electrodos de oro, cuando son almacenadas sin uso durante tiempo prolongado. Se encontró que las películas usadas después de ser almacenadas, se tornan menos conductoras que las películas usadas inmediatamente después de ser preparadas. En este estudio se empleó como técnica electroquímica, la Voltamperometría Estaci...

  18. Quand préoccupations environnementales et enjeux professionnels s'entrecroisent : le cas des entreprises participant aux essais de voitures électriques

    Directory of Open Access Journals (Sweden)

    Pierre Magali

    2014-07-01

    Full Text Available Des expérimentations visant à promouvoir le déploiement du véhicule électrique se sont fait jour dans le cadre de projets démonstrateurs, depuis quelques années. Elles ont en commun de proposer à des salariés d'utiliser ces voitures dans des conditions très similaires au futur proche. Ce texte vise à la fois à mettre en avant les raisons que les différentes parties prenantes – qu'il s'agisse des directions en charge des achats ou du développement durable, des gestionnaires de flotte, des utilisateurs finaux, etc. – ont de s'inscrire dans ces expérimentations, et à expliciter la prédominance des enjeux professionnels, qui continuent de déterminer le rapport à cette voiture. En effet, les registres professionnels (enjeux de reconnaissance, d'exemplarité et personnels se combinent dans l'adoption de cette technologie de mobilité durable, que la préoccupation environnementale ne suffit pas à expliquer.

  19. Les enjeux éthiques de l’élaboration des politiques publiques favorables à la santé : réflexion et illustration

    Directory of Open Access Journals (Sweden)

    Danielle Blondeau

    2011-06-01

    Full Text Available Au Québec, en vertu de la Loi sur la santé publique (L.R.Q. chapitre S-2.2, 2001, article 54, le ministre de la Santé a un droit de regard sur les mesures prévues par les autres ministères dans leurs lois et règlements qui pourraient avoir un impact significatif sur la santé de la population. Ainsi, les acteurs de santé publique du palier central ont cherché à soutenir la mise en oeuvre de cet article, de manière à favoriser l’adoption de politiques publiques favorables à la santé. Ce texte examine les enjeux éthiques liés à l’élaboration de telles politiques. Après avoir exposé les tensions entre bien individuel et bien commun ainsi que les valeurs de justice sociale, responsabilité et démocratie qui y sont reliées, nous illustrerons les enjeux éthiques à travers l’exemple du cinémomètre photographique comme mesure visant à augmenter la sécurité routière.

  20. Aleación superficial de superaleaciones base níquel mediante láser

    Directory of Open Access Journals (Sweden)

    Rodríguez, G. P.

    1998-04-01

    Full Text Available Ni based superalloys present a high oxidation resistance at high temperature as well as good mechanical properties. But new tecnhology developments forcé to research in this materials to improve their properties at high temperature. In this work, two Ni based superalloys (Nimonic 80A and Inconel 600 were surface alloyed with aluminium using a high power laser. SEM and EDX were used to study the microstructure of the obtained coatings. Alloyed specimens were tested at 1.273 K between 24 and 250 h. Results showed the generation of a protective and continuous coating of alumina on the laser treated specimens surface that can improve oxidation resistance.

    Las superaleaciones base níquel presentan una elevada resistencia a la oxidación a alta temperatura, así como excelentes propiedades mecánicas. Los nuevos desarrollos tecnológicos (condiciones cada vez más agresivas obligan a una casi continua modificación de dichas aleaciones. En el presente trabajo, dos superaleaciones base níquel (Nimonic 80A e Inconel 600 se alean superficialmente con aluminio utilizando un láser de alta potencia. Se estudia la microestructura de la capas obtenidas mediante SEM y EDX. Se realizan ensayos de oxidación a 1.273 K sobre las probetas aleadas y sobre el material base durante tiempos variables entre 24 y 250 h. Los resultados indican la formación de una capa protectora de alúmina sobre las probetas aleadas que puede incrementar la resistencia a la oxidación.

  1. Viscosidad y conductividad de escorias típicas en la producción de ferroníquel

    Directory of Open Access Journals (Sweden)

    Fabio Raúl Pérez Villamil

    2010-12-01

    Full Text Available Cerro Matoso S.A. procesa mineral  laterítico de níquel.Sus  actividades  involucran:  explotación minera, reducción,  fusión vía Arco Eléctrico y  refinación en hornos  tipo  cuchara.  El  producto  ferroníquel  es exportado en su  totalidad. La operación de fusión se realiza en un horno eléctrico, y una de las variables de control de proceso más importante es  la  temperatura de la escoria, que depende de las relaciones de SIO2 y magnesia (MgO, S/M, y de los porcentajes de alúmina(AL2O3. Cuando  la relación S/M es baja, o en  los casos  de  alúminas muy  altas,  las  propiedades  de  la escoria,  como  viscosidad  y  resistividad,  cambian ostensiblemente  y  resulta muy  complicado drenarla del  horno. Con  valores  calculados  de  viscosidad  y conductividad  eléctrica,  a partir  de una  herramienta diseñada  por  la  empresa,  se  procede  a  ubicarcomposiciones  de  escoria  típicas  en  un  diagrama modelo resultante de la operación en el año 2006.

  2. Problems and energy choices in Burkina Faso[Energie ; Economie domestique ; Bois de feu ; Produits petroliers ; Legislation fonciere ; Electricite]; Burkina : Problemes et choix energetiques

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1986-01-15

    This document is about the evaluation of the energy sector in Burkina Faso. It reports about the main issues of energy: poverty of the households, the lack of fund to finance the sector, desertification...The main resources of energy are firewood, fuel and electricity. The energy needs of Burkina Faso are related to the cooking of food, with liquid fuels intended for the railway transport and fuels used in industry and for the production of electricity. With regard to the transport sector, there is currently no possibility of substitution for the fuel, except the use of ethanol diluted in the gasoline. At the industrial level, agro-industrial, bagasse and the other residues constitute right now the independent source of energy for the production of industrial heat as well as for that of electricity. For the public network of electricity supply, the production rests exclusively on diesel power stations. Regarding the immense needs for its populations in energy, Burkina has only very limited resources. The biomass used for domestic needs cannot continuously ensure the households with the necessary energy supply for food cooking. As for the agro-industrial residues, they cannot reduce the industrial consumption of fuels. There are also hydraulic resources whose conscientious exploitation could contribute to decrease the fuel consumption in terms of electricity. In sum, it would be necessary to improve the regulation as regards firewood supply, to promote the use of improved hearths with wood, to plan the fuel supplies and to assist the SONABEL in the electric production capacities reinforcement of its fuel-based power stations. [French] Ce document traite de l evaluation du secteur de l energie au Burkina. Il fait etat des principaux problemes energetiques : pauvrete des menages, manque de financement dans le secteur, desertification... Les principales ressources energetiques sont le bois de feu, les produits petroliers et l electricite. Les besoins energetiques du

  3. Les enjeux d’une approche chronologique de la maison paysanne dans les Pays de la Loire

    Directory of Open Access Journals (Sweden)

    François Le Bœuf

    2012-04-01

    Full Text Available Mon propos part d’un constat, celui de la généralisation de l’usage de la maçonnerie dans la mise en œuvre de la maison paysanne, qui entraîne les questions suivantes : à quel type d’habitat « primitif » ces nouvelles constructions ont-elles succédé ? Quels indices chronologiques permettent de situer dans le temps, variable suivant les régions considérées, cette substitution (archives ; inscriptions ; critères techniques : charpente, mise en œuvre de la maçonnerie ; stylistiques : encadrement des baies, cheminées ? Cette approche particulière, dont les conclusions tendent à l’élaboration d’une chronologie de l’habitat paysan, implique la prise en compte des modalités de cette substitution. Son intérêt est d’autant plus grand que celle-ci invite à s’interroger sur les usages et donc sur le « programme » de la maison paysanne.This article is based on the observation of how masonry came to be used in the construction of peasant dwellings. This observation in the field raises the following questions. What was the ‘primitive’ nature of these constructions? What are the chronological indicators, different from one region to another, that permit precise dating for this appearance of masonry: archival sources, inscriptions, technical criteria, structural forms, nature of the masonry, stylistic considerations, surrounds of windows and doors, chimneys? This approach to the question can lead to a certain degree of precision in the dating of peasant dwellings, and implies a new appraisal of the ways this substitution took place. It is all the more interesting in so far as it raises interrogations about the uses of the peasant house, its architectural ‘brief’.

  4. Fabrice Flipo, 2007, Justice, nature et liberté. Les enjeux de la crise écologique. Lyon, Parangon/Vs, 311 p.

    Directory of Open Access Journals (Sweden)

    Jérôme Ballet

    2008-07-01

    Full Text Available Le livre de Fabrice Flipo est une invitation à la réflexion autour des débats écologiques actuels. Il s’agit d’un ouvrage ambitieux. Il présente l’émergence de la crise écologique et en discute de nombreux enjeux d’un point de vue éthique, tout en utilisant des références provenant de différentes disciplines pour éclairer son propos. Si le livre est assez agréable à lire, ce n’est pas en raison des raccourcis médiatiques qu’il aurait pu prendre, l’auteur menant au contraire sa réflexion avec ...

  5. Les TIC au coeur des pédagogies universitaires diversité des enjeux pédagogiques et administratifs

    CERN Document Server

    Karsenti, Thierry

    2001-01-01

    Cet ouvrage illustre en quoi les TIC jouent un rôle si important en pédagogie universitaire et pourquoi ce virage technologique est devenu incontournable. Les auteurs font une place tant aux expériences qu'aux théories sur l'intégration des TIC. Il est question de la diversité des formes de recours aux TIC, des enjeux de leur intégration en milieu universitaire, des défis sociaux sous-jacents à cette incursion technologique, des cours sur le Web, de l'apprentissage collaboratif, de la supervision des stagiaires et de la réforme scolaire.

  6. Du texte littéraire à la lecture littéraire : les enjeux d'un déplacement en classe de FLE/S

    OpenAIRE

    Collès, Luc; Dufays, Jean-Louis

    2007-01-01

    L’article analyse les moyens et les enjeux de deux approches complémentaires de la littérature en classe de FLE/S. Dans un premier temps, la lecture des textes littéraires est envisagée dans une approche pragmatique, qui vise à faire passer les apprenants du discours usuel au discours littéraire dans un même geste. Cette approche est elle-même intégrée dans la perspective actionnelle définie par le Cadre européen commun de référence pour les langues (2001), dont l’objectif est la formation d’...

  7. Resistência de união entre liga de níquel-cromo e cimentos resinosos

    Directory of Open Access Journals (Sweden)

    FRANÇA Rodrigo de Oliveira

    1998-01-01

    Full Text Available O objetivo do trabalho foi a determinação da retentividade, por ensaio de tração, entre uma liga de níquel-cromo e cimentos resinosos (Comspan, Panavia Ex e All-Bond C & B, com quatro tratamentos superficiais (liso, microjateado, ataque eletrolítico e silicoater e armazenagem por 3 e 30 dias em solução de NaCl a 0,9%, a 37° C e termociclagem intercalada na segunda (a 5 e 55° C, por 1 minuto em cada banho, perfazendo 600 ciclos. Os corpos de prova eram discos, providos de alça fixadora entre si dois a dois. Os resultados permitiram concluir que: superfícies lisas conduzem a baixíssimas retentividades e tratadas com silicoater a altíssimos valores, com qualquer cimento e condição de armazenagem; Panavia Ex com superfícies microjateadas também conduz a altas retentividades; a maior retentividade foi obtida pela combinação silicoater/All-Bond C&B.

  8. Sobre la impedancia faradaica de la disolución electroquímica del níquel

    Directory of Open Access Journals (Sweden)

    Agrisuelas, J.

    2005-12-01

    Full Text Available Consecutive impedance spectra for nickel electrodes in acid medium have been obtained. The first recorded spectrum is fitted to an equivalent circuit with three time constants, if one consider a partially or completely passivated electrode. The second registered spectrum is characteristic to a corrosion kinetic controlled by the transport across a finite layer thickness. The microscopic images show an increase in the irregularity of the electrode surface after the second spectrum is registered. Also, the double layer capacity is considerably increased.

    Se han obtenido espectros de impedancia consecutivos sobre electrodos de níquel en medio ácido. El primer espectro registrado se ajusta a un circuito equivalente con tres constantes de tiempo, considerando un electrodo parcialmente pasivado o completamente pasivado. El segundo espectro registrado es característico de una cinética de corrosión controlada por el transporte a través de una capa de espesor finito. Tras registrar el segundo espectro, las imágenes microscópicas muestran un aumento de la irregularidad en la superficie electródica. Al mismo tiempo la capacidad de doble capa aumenta considerablemente.

  9. Elución de iones de níquel desde esferas de alginato en un medio ácido

    Directory of Open Access Journals (Sweden)

    Aracena, Alvaro

    2016-03-01

    Full Text Available Elution of nickel ions from alginate beads was studied in a temperature range of 2 to 80 °C and a sulfuric acid concentration between 0.005 to 2.5 g L−1. The elution mechanism was established by ion exchange between nickel and ions protons, obtaining a value of 93% elution at a temperature of 80 °C and a H2SO4 concentration of 0.25 g L−1. The influence of other acids on nickel elution was also studied. The nickel elution rate was significantly influenced by temperature and concentration of H2SO4. Elution kinetics of nickel ions was studied, and the 1-(1-α1/3=kappt model properly described the kinetics of this reaction. The dependence of nickel elution on the sulfuric acid concentration was of the order of 0.33. Moreover, the intrinsic rate constants were determined and an activation energy value of 54.5 kJ mol−1 was obtained for the temperature range studied. The results indicated that the nickel elution is a process controlled by chemical reactions.Se estudió la elución de iones de níquel desde esferas de alginato en un intervalo de temperaturas de 2 a 80 °C y una concentración de ácido sulfúrico entre 0,005 a 2,5 g L−1. El mecanismo de elución fue establecido por intercambio iónico entre protones e iones de níquel alcanzando valores de elución de 93% a una temperatura de 80 °C y concentración de H2SO4 de 0,25 g L−1. También se estudió la influencia de otros ácidos sobre la elución de níquel. La velocidad de elución de níquel fue significativamente influenciada por la temperatura y concentración de H2SO4. La cinética de elución de iones de níquel fue estudiada y el modelo 1-(1-α1/3=kappt describió muy bien la cinética de esta reacción. La dependencia de la elución de níquel sobre la concentración de ácido sulfúrico fue del orden de 0,33. Además, fueron determinadas las constantes de velocidad intrínseca y se obtuvo un valor de energía de activación de 54,5 kJ mol−1 para el intervalo de

  10. Militantisme et identités gaies et lesbiennes : quelle identité pour quels objectifs ?

    Directory of Open Access Journals (Sweden)

    Guillaume Marche

    2008-05-01

    Full Text Available Le contexte de la guerre d’Irak met les mouvements sociaux identitaires face à un défi. Le mouvement gai, lesbien, bisexuel et transgenre (glbt se divise ainsi sur la question de savoir si son militantisme doit exclusivement se porter sur des enjeux d’orientation sexuelle. Cela rejoint la question théorique du rapport entre identité collective et objectifs politiques : l’identité est-elle conditionnée par les objectifs, ou est-ce l’inverse ? Les prises de position divergentes des organisations glbt sur la guerre d’Irak permettent de conclure que l’identité n’est pas donnée a priori — c’est-à-dire qu’elle n’est pas a priori apolitique pour n’être politisée que par nécessité – mais que c’est un vecteur de sens politique, qui ne définit pas la posture politique, mais la véhicule et en est le signifiant. Ainsi, la ligne de fracture politique pertinente dans le mouvement glbt ne correspond pas aux divisions traditionnelles universalisme–différentialisme ou intégrationnisme–séparatisme, mais à la distinction entre des conceptions fixes et fluides de l’identité collective.The war in Iraq poses a challenge for identity-based social movements. The lesbian, gay, bisexual and transgender (LGBT movement is split as to whether it should mobilize exclusively around issues narrowly defined in terms of sexual orientation. This raises the theoretical issue of the relationship between collective identity and political goals: is identity determined by goals, or is it the reverse? LGBT organizations’ diverging stances on the war in Iraq lead us to conclude that identity is not a given—an essentially apolitical identity which is politicized out of necessity—but a vehicle and a signifier of political meaning which it does not in itself determine. Consequently, the politically significant fault-line in the LGBT movement does not derive from traditional divisions (sameness v. difference, integration

  11. Sinterização por micro-ondas de ferrita de níquel sintetizada pelo método Pechini

    Directory of Open Access Journals (Sweden)

    J. R. Muñoz Hoyos

    2013-09-01

    Full Text Available A sinterização por micro-ondas é uma técnica que oferece enorme potencial para a fabricação de diversos materiais cerâmicos com microestruturas cerâmicas diferenciadas. Este trabalho teve por objetivo sinterizar cerâmicas de ferrita de níquel (NiFe2O4 em forno de micro-ondas, visando controle de crescimento de grão e alta densificação. Para realizar esta investigação, foi utilizado o processo de síntese por Pechini para a preparação do pó das ferritas de níquel. Amostras desse material foram sinterizadas em forno convencional e de micro-ondas. A caracterização foi feita por difração de raios X, microscopia eletrônica de varredura, determinação de densidade aparente e obtenção das curvas de histerese magnética. A sinterização da ferrita de níquel por micro-ondas levou apenas 10% do tempo gasto da sinterização convencional. As amostras apresentaram menor tamanho de grão, e densidade e magnetização de saturação semelhantes às obtidas pela sinterização convencional, mostrando o alto potencial de aplicação da técnica de micro-ondas para o processamento desses materiais.

  12. Build together the problem, obligatory passage for the conception of acceptable energy solutions?; Construire ensemble le probleme, passage oblige pour la conception de solutions energetiques acceptables?

    Energy Technology Data Exchange (ETDEWEB)

    Fortin, Marie-Jose; Le Floch, Sophie

    2010-09-15

    Social acceptance is a condition in performing energy projects. This notion is however complex: just like 'build', it is based on several factors and is changing. We would like to show that its construction requires that some time be spend at a stage often neglected, that of the formulation of the problem. So that the 'awareness' would be aimed not only to the public, but also to the decision makers and promoters, so that everyone has a good knowledge of the concerns of the others, and of their limits. To this end, the 'participation' could take several forms, complementary to the 'public' one generally accepted. [French] L'acceptabilite sociale est une condition de realisation de projets energetiques. Cette notion est toutefois complexe : comme 'construit', elle se fonde sur plusieurs facteurs et est evolutive. Nous voudrions montrer que sa construction exige qu'un temps soit consacre a une etape souvent negligee, celle de la formulation du probleme. Ainsi, la 'sensibilisation' serait destinee non seulement au grand public, mais aussi aux decideurs et promoteurs, afin que tous aient une bonne connaissance des preoccupations des uns et des autres, comme de leurs contraintes. A cette fin, la 'participation' pourrait prendre plusieurs formes, complementaires a celle 'publique' generalement adoptee.

  13. Jeux et enjeux olympiques

    Directory of Open Access Journals (Sweden)

    Pierre LEBLANC

    1989-06-01

    Full Text Available Les actes de candidatures et de choix des villes pour l'organisation des différentes sessions des Jeux Olympiques contemporains ne sont pas le fruit du hasard. Dans l'un et l'autre cas, il s'agit d'actes dont la signification s'inscrit dans le contexte politique du moment.

  14. Mouvements et enjeux sociaux

    International Development Research Centre (IDRC) Digital Library (Canada)

    20 févr. 2004 ... les théories sociologiques et politiques en rapport avec les perceptions, le ...... Enfin, le recrutement de force des shégués dans l'armé et la police n'a pas fait mieux ..... dépassent en ingéniosité et en stratégie. D'où le vœu ...

  15. Avaliação de Revestimentos de Liga de Níquel 625 Depositados pelo Processo Eletroescória

    OpenAIRE

    Sandes, Soraia Simões; Alvarães, Camila Pereira; Mendes, Matheus Campolina; Araújo, Leonardo Sales; Souza, Luis Felipe Guimarães de; Jorge, Jorge Carlos Ferreira

    2017-01-01

    Resumo A aplicação de revestimentos de ligas de níquel é comumente realizada na indústria de petróleo e gás para aumento da vida de equipamentos em ambientes agressivos, dado que este procedimento melhora a resistência à corrosão, sem um aumento significativo do custo de produção quando comparado com equipamentos maciços fabricados com outras ligas. Normalmente, as juntas são soldadas pelos processos de eletrodos revestidos, MIG/MAG ou TIG. Neste aspecto, o processo eletroescória realiza depo...

  16. Caracterización superficial, electroquímica y de composición de aleaciones zinc níquel electrodepositadas

    OpenAIRE

    PIRATOBA, ULISES; VERA, ENRIQUE; ORTIZ, CESAR

    2008-01-01

    La gran demanda de láminas de acero recubiertas con Zinc o con aleaciones de Zinc, es atendida conprocesos de electro deposición en continuo; estos requieren de altas densidades de corriente, obtenidas en electrolitos ácidos. En este trabajo se presenta la composición, morfología superficial y la caracterización electroquímica de aleaciones Zinc Níquel fase gamma sobre láminas de acero, depositadas con altas densidades de corriente. Estas fueron determinadas mediante Análisis de Energía Disp...

  17. Local energy policies: Planning devices and coaching tools - Example of the French case; Politiques energetiques locales: Dispositifs de planification et outils d'accompagnement - Exemple du cas francais

    Energy Technology Data Exchange (ETDEWEB)

    Chanard, Camille; de Sede-Marceau, Marie-Helene

    2010-09-15

    Collectivities traditionally have multiple responsibilities linked to energy. They act directly on the energy chain (production-distribution-consumption) through their heritage, but also on the tripych space-environment-society, in particular through their planning choices. Hence, all the public policies are concerned by the energy theme. However, collectivities seem to suffer from an information deficit, both on planning devices that can be mobilized and on the territory features. This article proposes to realise an overview tour of the coaching tools that can be used by the French territories collectivities to build efficient energy policies. [French] Les collectivites ont traditionnellement des responsabilites multiples en lien avec l'energie. Elles agissent directement sur la chaine energetique (production-distribution-consommation) a travers leur patrimoine, mais aussi sur le triptyque espace-environnement-societe, en particulier a travers leurs choix d'amenagement. Ainsi, toutes les politiques publiques sont concernees par la thematique ' energie '. Cependant, les collectivites semblent souffrir d'un deficit d'information, tant sur les dispositifs de planification pouvant etre mobilises que sur les caracteristiques du territoire. Cet article propose de realiser un tour d'horizon de l'ensemble des outils d'accompagnements pouvant etre mobilises par les collectivites territoriales francaises pour construire des politiques energetiques efficaces.

  18. Metodología para el diseño de indicadores económico-ambientales en la minería de níquel

    Directory of Open Access Journals (Sweden)

    Clara L. Reynaldo-Argüelles

    2012-06-01

    Full Text Available En las empresas mineras de la industria del níquel en Cuba la eficiencia económica se evalúa mediante dos únicos indicadores que no incluyen el análisis de la dimensión ambiental. En este artículo se realiza un estudio comparativo de los métodos internacionalmente aplicados para evaluar impactos ambientales con el fin de proponer una metodología que incluya indicadores económico-ambientales para la minería del níquel. La metodología que se propone formula nueve indicadores que, basados esencialmente en los costos, permiten medir la responsabilidad ambiental de las empresas. La aplicación de estos indicadores minimiza la incidencia de los costos de la actividad minera en el costo total de la empresa, facilita la planificación, el uso adecuado y el control de los recursos naturales, y la asunción de conductas responsables hacia el entorno.

  19. Processamento de Ligas de Níquel com Técnica de Manufatura Aditiva Utilizando Plasma por Arco Transferido

    Directory of Open Access Journals (Sweden)

    Eduardo André Alberti

    2015-06-01

    Full Text Available ResumoA manufatura aditiva é um processo utilizado para a construção e reparos de peças que possuem geometria complexa ou que necessitem de gradiente de propriedades. Nessa técnica múltiplas camadas são depositadas para a construção da geometria do componente. O sucesso desse procedimento depende de fatores como a técnica de deposição, parâmetros, liga a ser depositada e condições da deposição, como temperatura e atmosfera protetora. Neste estudo, o potencial da técnica de Plasma por arco transferido para manufatura aditiva foi avaliado produzindo “paredes finas”, construídas a partir da sobreposição de cordões. Foram utilizadas duas ligas a base de níquel, uma endurecida por precipitação e outra endurecida por solução sólida. Durante os trabalhos, foram selecionados os parâmetros de processamentos, incluindo a avaliação do efeito do pré-aquecimento a 300°C. Resultados mostraram que a composição química da liga influencia a geometria da parede construída assim como a utilização de pré-aquecimento. Estruturas de solidificação exibindo dendritas refinadas com crescimento epitaxial entre camadas são identificadas. Entretanto, as características da liga determinam o perfil de dureza ao longo da seção transversal, sendo a liga endurecida por precipitação influenciada pelos ciclos térmicos de deposição e a liga endurecida por solução sólida pela diluição com o substrato. Em qualquer dos casos é recomendado a aplicação de tratamento térmico pós-soldagem para uniformização das propriedades.

  20. Sur la scène de crime… : Enquête sur les enjeux linguistiques et stylistiques de motifs récurrents dans le thriller contemporain

    OpenAIRE

    Gonon Laetitia; Kraif Olivier; Novakova Iva; Piat Julien; Sorba Julie

    2016-01-01

    À partir d’un vaste corpus de romans policiers, l’étude propose de cerner les propriétés linguistiques et les fonctions textuelles de l’expression scène de crime ; la méthode adoptée associe les outils de la linguistique de corpus et les travaux en stylistique. Il s’agit de montrer comment les structures où apparaît cette expression scène de crime déterminent des traits stylistiques propres au thriller et quels rôles joue alors l’expression dans l’économie narrative de ce sous-genre du roman ...

  1. Utilidad de la conformación del túnel liso antes de usar limas rotatorias endodónticas de níquel-titanio

    Directory of Open Access Journals (Sweden)

    Javier Laureano Nino Barrera

    Full Text Available Introducción: para prevenir la fractura de instrumentos endodonticos actualmente se siguen investigando materiales, técnicas y diseños los cuales buscan reducir su incidencia. La conformación de túnel liso (Glide Path se ha propuesto con este fin, sin embargo su utilidad ha sido controvertida. Objetivo: comprobar teóricamente mediante la utilización de un análisis de elementos finitos, la utilidad de la conformación de túnel liso, antes de la utilización de limas rotatorias endodonticas de níquel-titanio. Métodos: se realizó una simulación numérica mediante un análisis de elementos finitos, para lo cual se construyeron modelos matemáticos de las limas rotatorias de níquel-titanio S1 y S2 de la serie Protaper®. Con el software Simulation multyphisics de Autodesk® se programaron las propiedades mecánicas de las limas y un límite de falla por fractura de 1270,588 MPa. Posteriormente se aplicó el torque recomendado por el fabricante y se fijo la punta del instrumento (sin conformación de túnel liso aplicando allí restricciones en todos los grados de libertad.Para simular la realización de la conformación de túnel liso, se aplicaron restricciones en todos los grados de libertad a una determinada distancia de la punta del instrumento, simulando de esta forma que la punta del instrumento permanecía libre. Resultados: al fijar la punta de las limas, los esfuerzos máximos fueron 1545,77 MPa para la S1 y 1306,47 MPa para la S2, observando fractura de los instrumentos. Al fijar las limas a distancia de la punta no se observó fractura. Conclusiones: se demostró teóricamente que al impedir que se atrapen la punta de las limas, se previene su fractura y que dicho atrapamiento se evita con una conformación de túnel liso, por lo que se concluye que este procedimiento es útil para prevenir la fractura de los instrumentos rotatorios de níquel-titanio.

  2. APLICACIÓN DE LA PLANEACIÓN ESTRATÉGICA EN EL CENTRO DE INVESTIGACIONES DEL NÍQUEL

    Directory of Open Access Journals (Sweden)

    Ester Rodríguez Castillo

    2010-12-01

    Full Text Available La investigación se realiza en el Centro de Investigaciones del Níquel, con el objetivo de diseñar la Planeación Estratégica de la empresa y así mejorar su desempeño. Para alcanzar el objetivo, se utilizaron métodos teóricos de investigación científica: análisis y síntesis, hipotético-deductivo, histórico-lógico; así como algunos de los métodos empíricos de investigación: observación directa, entrevistas, tormenta de ideas, encuestas, consulta y revisión de documentos, trabajo en grupos, entre otros. Para procesar toda la información obtenida se empleó el paquete de programas de Office y otros software.Entre los principales resultados alcanzados se encuentran la definición de una nueva misión y visión del centro, involucrando a los trabajadores en el proceso de toma de decisiones; la definición de los objetivos estratégicos y las estrategias a seguir para alcanzarlos; así como la elaboración del plan de acción, cuya ejecución ha permitido desde el 2007 a la fecha actual, el incremento de las ventas en un 23 % con la realización de 60 nuevos servicios científico-tecnológicos, la disminución del consumo de energía eléctrica en 180 MW, el aumento de la productividad en más de 3000 pesos, y el logro de la ejecución de inversiones por 594 miles de pesos, que significan un mejoramiento considerable en las condiciones de trabajo del centro.AbstractThe investigation is carried out in the Nickel research Center, with the objective of designing the Strategic Projection of the company in order to improve its performance. To reach the objective, theoretical methods of scientific investigation were used, such as: the analysis-synthesis method, deductive-hypothetical, logical-historical method; as well as some of the empiric methods of investigation: direct observation, interviews, brainstorming, surveys, the consult and revision of documents, team group, among others. To process all the obtained information it was

  3. Energy diagnosis; Diagnostic energetique

    Energy Technology Data Exchange (ETDEWEB)

    Vivien, P. [Centre Technique des Industries Mecaniques (CETIM), Franche-Comte (France)

    1996-12-31

    Through a partnership with regional authorities and the French Energy Conservation Agency (ADEME), the CETIM (Technical Agency for Mechanical Industries) is proposing energy audits in industrial plants with the aim to increase the plant performances, reduce energy costs and work out environmental issues. Concrete improvement solutions are proposed with profitability calculations. The audit procedure is presented. The most efficient solutions generally involve energy tariff rate shifts, heating regulation, power cut-off, reactive energy compensation and lighting management

  4. Energy efficiency; Efficacite energetique

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-06-15

    This road-map proposes by the Group Total aims to inform the public on the energy efficiency. It presents the energy efficiency and intensity around the world with a particular focus on Europe, the energy efficiency in industry and Total commitment. (A.L.B.)

  5. Sistema para el almacenamiento de la información geológica en empresas del níquel

    Directory of Open Access Journals (Sweden)

    Mirelis Rasúa-López

    2000-03-01

    Full Text Available En el presente artículo se exponen las características de un sistema computarizado para el almacenamiento y consulta de la información geológica llamado PinExplorer, y realizado por encargo de la Empresa Pinares S.A. Soportado sobre Delphi 4, PinExplorer se inserta totalmente en interfaz de Windows 95 y de Windows NT, trabaja eficientemente en red, tiene un diseño normalizado de las bases de datos, y estas pueden ser importadas y exportadas de forma conveniente con la garantía de validación correspondiente. Para mayor seguridad, las bases se almacenan en formato comprimido y protegidas con contraseña. Por sus características, PinExplorer puede ser implementado en cualquiera de las empresas del níquel de nuestro país.

  6. REMOCIÓN DE NÍQUEL Y DQO PRESENTES EN LAS AGUAS RESIDUALES DE LA INDUSTRIA AUTOMOTRIZ MEDIANTE ELECTROCOAGULACIÓN

    OpenAIRE

    Mercado Martínez, Iván Darío; González Silva, Germán; Valencia Hurtado, Sergio Humberto

    2013-01-01

    Mediante este estudio se determinó si la técnica de electrocoagulación contribuye a minimizar la concentración de níquel y materia orgánica y la demanda química de oxígeno (DQO) en las aguas residuales de la industria automotriz. Se empleó un diseño experimental factorial multinivel aleatorio en el que la densidad de la corriente y el tiempo de reacción fueron evaluados en tres niveles, mientras que la separación entre electrodos fue analizada en dos niveles. La electrocoagulación se llevó a ...

  7. Modelación matemática del proceso de reducción para la obtención de ferroníquel

    Directory of Open Access Journals (Sweden)

    Lianis Columbié-Navarro

    2011-03-01

    Full Text Available Se modeló matemáticamente el proceso de reducción para la obtención de ferroníquel. Partiendo de las ecuaciones de balance material y energético se expone el sistema de ecuaciones que conforman el modelo matemático dinámico y la fundamentación científica sobre la cual fueron obtenidas. Para la transformación de las ecuaciones de balance material y energético se consideraron los principales óxidos y elementos que componen el mineral, los gases de la combustión y las temperaturas del material, de las paredes del horno y de los gases reductores. Se obtuvo un sistema de ecuaciones diferenciales de primer orden, complementadas con otras ecuaciones algebraicas que establecen la relación entre los coeficientes y los parámetros físicos.

  8. Propiedades mecánicas de tres marcas de arcos ortodóncicos de níquel-titanio termoactivados. Estudio in vitro

    OpenAIRE

    Ramos Torres, Viviana; Soldevilla Galarza, Luciano; Mattos Vela, Manuel

    2014-01-01

    La selección óptima de los alambres ortodóncicos permite al profesional realizar el tratamiento de manera eficiente; por ello, se requiere el conocimiento de las propiedades mecánicas básicas, las cuales no son reveladas por sus fabricantes. El estudio tuvo como objetivo comparar las propiedades mecánicas (tensión en la zona de activación constante, elongación en la zona de activación constante, resistencia máxima y límite de ruptura) de tres marcas de alambres ortodóncicos de níquel-titanio ...

  9. Adubação foliar com níquel e molibdênio no feijoeiro comum cv. Ouro Vermelho

    Directory of Open Access Journals (Sweden)

    José Francisco Lopes

    2014-04-01

    Full Text Available O objetivo deste trabalho foi avaliar o efeito da aplicação foliar de níquel (Ni e molibdênio (Mo sobre componentes de rendimento, crescimento e composição mineral do feijoeiro comum Ouro Vermelho. O delineamento experimental foi o de blocos casualizados, com quatro repetições e arranjo fatorial 5 x 2, constituído de doses de Ni (0, 15, 30, 45 e 60 g ha-1 e de Mo (0 e 80 g ha-1, aplicadas por via foliar, aos 25 dias após a semeadura, na forma de cloreto de níquel hexaidratado e de molibdato de amônio, respectivamente. As doses de Ni não influenciaram os teores foliares de N, P, K, Fe, Mo e Ni, aumentaram, porém, os teores de N, Ni e de proteína bruta na semente. A aplicação foliar de Mo reduziu os teores foliares de P, Fe e Ni, aumentou, no entanto, o teor foliar de Mo e o teor de N, Mo e de proteína bruta na semente. Observou-se que as doses de Ni e de Mo não afetaram a massa de sementes, o número de sementes por vagem, o número de vagens por planta e a massa seca de raiz do feijoeiro. A aplicação de Mo aumentou em 21,62% o número de nódulos.

  10. REMOCIÓN DE NÍQUEL Y DQO PRESENTES EN LAS AGUAS RESIDUALES DE LA INDUSTRIA AUTOMOTRIZ MEDIANTE ELECTROCOAGULACIÓN

    Directory of Open Access Journals (Sweden)

    Iván Darío Mercado Martínez

    Full Text Available Mediante este estudio se determinó si la técnica de electrocoagulación contribuye a minimizar la concentración de níquel y materia orgánica y la demanda química de oxígeno (DQO en las aguas residuales de la industria automotriz. Se empleó un diseño experimental factorial multinivel aleatorio en el que la densidad de la corriente y el tiempo de reacción fueron evaluados en tres niveles, mientras que la separación entre electrodos fue analizada en dos niveles. La electrocoagulación se llevó a cabo en un reactor batch usando electrodos de hierro con arreglo monopolar. Fueron utilizadas las técnicas analíticas de digestión ácida, absorción atómica de llama de aire-acetileno y reflujo cerradocolorimétrico (micro DQO para determinar el contenido de los contaminantes. Las condiciones con que se obtuvo la mayor descontaminación del agua analizada fue con la densidad de corriente aplicada: 1,04 A/dm² y tiempo de operación: 17 minutos; con estas variables se observó que la separación electródica no influyó. Los resultados indican que la electrocoagulación podría ser usada para disminuir el níquel y la materia orgánica (DQO presentes en las aguas residuales de la industria automotriz.

  11. Les « faux » mariages homosexuels de Sidi Ali au Maroc : enjeux d’un scandale médiatique

    Directory of Open Access Journals (Sweden)

    Florence Bergeaud-Blackler

    2012-01-01

    Full Text Available Les affaires de « mariages homosexuels » à Ksar el Kebir puis à Sidi Ali ont fait grand bruit dans la presse marocaine. Au-delà de l’émotion soulevée par le scandaleux amalgame entre l’institution respectée du mariage et une forme illégale de sexualité, elle a mis en évidence une transformation du traitement public de la question homosexuelle. Le changement de ton de la presse reflète-t-il celui de l’attitude de la société marocaine vis-à-vis de l’homosexualité ? Assiste-t-on à l’émergence d’une communauté homosexuelle militant pour la défense de ses droits ? Les « mariages » de Ksar el Kebir et de Sidi Ali constituent-ils des démonstrations visant à briser le tabou de l’homosexualité par l’émergence d’une « fierté » homosexuelle ? D’enquêtes menées à Sidi Ali, Fez et Casablanca, nous concluons que la médiatisation autour des affaires de mariages d’homosexuels a été un instrument d’une stratégie d’un « retour de la morale » aux relents nationalistes consécutive à la période d’establishement du roi Mohamed VI. L’article s’attache à montrer les enjeux locaux et nationaux d’une fausse chasse aux sorcières dans un pays où les conditions d’un débat sur la dépénalisation de l’homosexualité ne semblent pas encore réalisées.

  12. Des alliances d’action pour faire des enjeux sociétaux une source d’innovation, de création et de transformation

    Directory of Open Access Journals (Sweden)

    Philippe Lemoine

    2012-01-01

    Full Text Available Les rapports entre l’économie et les autres sphères de la société sont en train de se transformer, et avec eux, les expressions de la solidarité et les modèles d’engagement. Parmi eux, les alliances entre acteurs hétérogènes (entreprises, ONG et « social business », pouvoirs publics, acteurs de l’Internet, etc. permettent de s’attaquer aux grands enjeux de ce monde avec davantage de justesse et d’efficacité. En agrégeant des acteurs aux logiques différentes dans une dynamique de co-création, les alliances ouvrent de nouveaux horizons de développement. Avec la Clinton Global Initiative, Bill Clinton s’est donné comme objectif d’encourager les alliances sur des actions généreuses qui soient efficaces et mesurables. Si la dynamique fonctionne dans le monde anglo-saxon, elle peine à s’installer en Europe. Pourtant les acteurs européens disposent de nombreux atouts pour s’engager dans de nouvelles alliances transformatrices de notre monde et auraient tout intérêt, pour ce faire, à se fédérer. Plusieurs membres européens de la Clinton Global Initiative ont ainsi lancé le réseau « The European Network » pour amorcer un mouvement en Europe et donner une ambition européenne à l’engagement sociétal. Cet article décrit les singularités des alliances avant de présenter la structuration de l’action européenne en relation avec la Clinton Global Initiative.

  13. Biologia e conservação de quelônios no Delta do Rio Jacuí - RS : aspectos da história natural de espécies em ambientes alterados pelo homem

    OpenAIRE

    Clovis de Souza Bujes

    2008-01-01

    O conhecimento que temos sobre a história natural de quelônios ocorrentes no Brasil, e principalmente no estado do Rio Grande do Sul, é ainda rudimentar. As principais causas dessa carência de informações na literatura são atribuídas à dificuldade de obtenção de dados de animais na natureza. As ações humanas colocaram em risco várias populações de quelônios e sua biodiversidade tem declinado por todo o mundo. Desta forma, este estudo busca informações básicas acerca da historia natural de pop...

  14. Remoção de sulfeto em uma estação de tratamento de efluentes de níquel por oxidação úmida

    OpenAIRE

    ALVES, Valderice Pereira

    2006-01-01

    O tratamento das águas residuárias de uma indústria de componentes eletrônicos que utiliza níquel em seu processo de deposição eletroquímica, consiste no uso dos métodos físico-químicos tradicionais, como precipitação química e filtração. Esta indústria da região nordeste remove o níquel presente em seu efluente pela adição de sulfeto de sódio em excesso garantindo a completa precipitação do metal. O processo de oxidação adotado pela indústria para remover o sulfeto remanescente é a remoção c...

  15. Une espérance post-critique ? Enjeux critiques de la conception ricœurienne de l'imaginaire social

    Directory of Open Access Journals (Sweden)

    PEGGY AVEZ

    2014-12-01

    Full Text Available RésuméLa fondation anthropologique de la fonction critique – socialement endossée par l’imaginaire utopique – et son lien dynamique avec la tâche intégrative de l’idéologie permettent à Ricœur de repenser sur le plan socio-politique la double nécessité du soupçon et de l’espérance. En reliant l’analyse de la structure contradictoire et analogisante de l’imaginaire social aux perspectives antérieurement développées sur “la liberté selon l’espérance,” notre propos vise à expliciter ses enjeux émancipateurs. Les apories auxquelles les médiations symboliques contraignent l’agir doivent nourrir la double nécessité d’un “devoir de vigilance” et d’une “timide espérance”: telle est à la fois la difficulté irréductible et la force critique de l’analyse ricœurienne de l’imagination socialisante.Mots-clés: imaginaire social, critique, idéologie, utopie, espérance.AbstractThe anthropological foundation of the critical function—endorsed by the utopian imaginary—and its dynamic relation with the integrative task of ideology allow Ricœur to rethink, at a social and political level, the necessity of both suspicion and hope. Linking Ricœur’s analysis of the contradictory and analogizing structure of the social imaginary to perspectives on “freedom in the light of hope,” which were developed earlier, it is my intention to make explicit certain emancipatory issues. The aporiae to which symbolic mediations constrict acting must provide for the necessity of both an “obligation for vigilance” and a “tentative hope.” Such is the irreducible difficulty but also the critical force of Ricœur’s analysis of the socializing imagination.Keywords: Social Imaginary, Criticism, Ideology, Utopia, Hope.

  16. Enjeux communicationnels du Web 2.0 pour les Relations Publiques/Professional and organisational issues of Web 2.0 Public Relations

    Directory of Open Access Journals (Sweden)

    Francine Charest

    2012-12-01

    Full Text Available The Web 2.0, which includes Facebook, Twitter, Youtube and other social medias, is considered as to be one of the strongest communication tools of the early 21st century. TheWeb evolutionhas changed deeply the way Public relations agents operate. In 2009, Charest and Bédard have shown that the Web 2.0 was in fact a reclaim by the internet users of the Web as it was first imagined by Tim Berners-Lee in November 1993 : a tool to exchange and share information. The Web first generation has instead been used by the administrators for dissemination and promotion. Today, in order to appropriate themselves these new medias, PR agents have to findnew business models, even new ways to communicate.RésuméLe Web 2.0, regroupant les Facebook, Twitter, YouTube et autres médias sociaux, est considéré comme l’un des plus puissants outils de communication, en ce début de XX1 siècle. C’est sous l’angle de mutations qu’il induit sur les pratiques des professionnels en relations publiques, qu’il nous intéresse d’étudier les enjeux de l’évolution des usages du Web 2.0. Charest et Bédard ont montré en 2009 que le Web 2.0 était la revanche des internautes qui tentent de se réapproprier le Web tel qu’il avait été conçu par Tim Berners-Lee en novembre 1993, soit comme un outil d’échange et de partage d’information. Il a été clairement montré que la première générationde Web a plutôt été utilisée par les gestionnaires à des fins de diffusion et de promotion. L’appropriation de ces nouveaux médias par les relationnistes passe nécessairement par de nouveaux modèles d’affaires, voire de nouvelles façons de communiquer.

  17. Towards the development of a regional electricity market in Central Africa: Issues and Challenges; Vers la realisation d'un marche regional de l'electricite en Afrique Centrale: Enjeux et defies

    Energy Technology Data Exchange (ETDEWEB)

    Veilleux, Rheaume; Mbadinga, David; Kitoko Senghi, Laurent

    2010-09-15

    This article gives a short description of the African continent. It then describes the 5 energy pools covering 54 countries: COMELEC, SAPP, WAPP, PEAC, EAPP. More specifically, the article looks at the main strategies and methods to be put in place in order to implement the electricity market, in particular the regional market of Central Africa. The current interconnecting projects and studies between different African countries, made by RSW international in collaboration with different partners, are presented, and in a more comprehensive way, the one related to the Interconnexion of the electrical networks of the member countries of the ECCAS. [French] Cet article presente une courte description du continent africain. Par la suite, on decrit les 5 pools energetiques couvrant les 54 pays : COMELEC, SAPP, WAPP, PEAC, EAPP. Plus specifiquement, on aborde les principales strategies et moyens a mettre en place pour implanter et developper le marche de l'electricite, plus particulierement le marche regional de l'Afrique centrale. Les projets ou etudes d'interconnexion en cours entre differents pays de l'Afrique, realises par RSW International de concert avec differents partenaires, sont presentes et, de facon plus exhaustive, celle relative au projet de l'Interconnexion des Reseaux Electriques des Pays Membres de la CEEAC.

  18. Parámetros y factores asociados a la dilución interna en yacimientos cubanos de níquel y cobalto

    Directory of Open Access Journals (Sweden)

    Lázaro Fernández-Martínez

    2015-12-01

    Full Text Available El propósito de este trabajo fue establecer, en los yacimientos cubanos de níquel y cobalto, los elementos que condicionan e identifican las intercalaciones de baja ley, generadoras de dilución interna, para su posterior separación durante el laboreo minero. La observación y la interpretación de datos geológicos y geoquímicos de pozos y frentes de explotación permitieron diferenciar, según su naturaleza geológica o minera, los distintos elementos que engloban los parámetros y factores vinculados con la dilución interna. Son los parámetros y factores geoquímicos del componente geológico los que mejor caracterizan las intercalaciones a partir de muestras de perforación, mientras que el control de campo es, dentro del componente minero, el que mejor permite identificar (y separar las intercalaciones inmediatamente antes del ingreso de las menas al proceso industrial, en virtud del potencial selectivo de la tecnología minera y de los equipos de arranque actuales.

  19. ¿Cuál es el mejor método para estimar variables en yacimientos lateríticos de níquel y cobalto?

    Directory of Open Access Journals (Sweden)

    Niurka Pérez-Melo

    2006-03-01

    Full Text Available Para determinar el método más adecuado de estimar los contenidos de hierro, níquel y cobalto en los yacimientos lateríticos del nordeste de Cuba, se compararon los errores puntuales asociados a varios algoritmos de estimación y simulación, tomando como caso de estudio el bloque O48 del Yacimiento Punta Gorda. La comparación se basó en los resultados de la técnica de jackknife. Los métodos de estimación y simulación lognormal, krigeage con modelo de spline, simulación gaussiana secuencial y simulación condicional por el método de bandas rotantes, esta última con 100 bandas aleatorias. En todos los casos se alcanzaron resultados similares con respecto a la media de los errores, a excepción del krigeage con modelo de spline. La diferencia entre los métodos sólo se hace evidente al comparar las distribuciones de frecuencias de dichos errores. Se demuestra que la exactitud de la estimación, en este caso de estudio, está más influenciada por las características de los datos experimentales y de la estrategia (o elipsoide de búsqueda, que por los métodos de estimación que se empleen.

  20. HIERRO ELEMENTAL PARA REMOCIÓN DE NÍQUEL, COMÚNMENTE ENCONTRADO EN DRENAJE ÁCIDO DE MINAS

    Directory of Open Access Journals (Sweden)

    Maria A. Liendo

    2011-01-01

    Full Text Available El objetivo de este estudio fue evaluar la remoción del Ni2+ con partículas de hierro comercial, pues este catión se encuentra frecuentemente en los drenajes ácidos de minas (DAM, que es uno de los problemas ambientales más serios en la industria minera que afecta fuentes de aguas naturales. Fueron realizados ensayos en laboratorio con hierro comercial y soluciones sintéticas que contienen Ni2+, para observar tanto la cinética de remoción como los datos de equilibrio. Los resultados, mostraron que estos siguen el modelo de la isoterma de adsorción de Langmuir y que los datos cinéticos se ajustaron con la ecuación del modelo de adsorción de pseudo segundo orden. Se concluye del presente estudio que la remoción de níquel con hierro en estado elemental (HEE es posible y ocurre de manera rápida.

  1. Fabricación de una superaleación de base níquel con estructura celular y microporosidad interconectada

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    Bernabé, A.

    1998-05-01

    Full Text Available A cellular metallic material with interconnected porosity of controlled size of an order of 10 μm has been developed by electrochemical dissolution of tungsten grains in a W-Ni-Fe heavy alloy. The nickel superalloy with sponge structure and high surface/volume ratio can also be processed recycling chips from heavy metal machining (Patent n° P9700191, 1997. Applications for the new material could be found as support for catalysts, high temperature filters for corrosive fluids, burners, etc.

    En este artículo se describe la preparación y caracterización de una superaleación de base níquel de microporosidad controlada, partiendo de una aleación pesada W-Ni-Fe de naturaleza densa y con métodos electrolíticos. Se ha conseguido un proceso factible de fabricación y, simultáneamente, una oportunidad de reciclado de las virutas de mecanizado de metal pesado. Tanto el nuevo material como el proceso de obtención han sido objeto de patente (Núm. P9700191, 1997. El nuevo material podría ser interesante como soporte de catalizadores, filtro de fluidos corrosivos a temperaturas elevadas, difusor en quemadores, etc.

  2. Précaution et développement régional durable dans le domaine des risques naturels. Quels enseignements tirer des exemples présentes ?

    OpenAIRE

    Brugnot, Gérard

    2013-01-01

    Note portant sur l’auteur 1. RISQUES NATURELS : ALEA ET VULNERABILITE Le risque naturel est constitué de l'aléa et de la vulnérabilité. On peut compliquer cette définition en ajoutant, comme Finlay (1997), des niveaux de profondeur d'analyse (phénomènes/aléas vs enjeux/vulnérabilité), ou bien encore en prenant en compte l'aléa et la vulnérabilité perçus, faisant respectivement appel aux probabilités subjectives et aux théories de l'utilité et du risque en économie. R=G(A) ⊗ *U(D)* Dans cette...

  3. Sur la scène de crime… : Enquête sur les enjeux linguistiques et stylistiques de motifs récurrents dans le thriller contemporain

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    Gonon Laetitia

    2016-01-01

    Full Text Available À partir d’un vaste corpus de romans policiers, l’étude propose de cerner les propriétés linguistiques et les fonctions textuelles de l’expression scène de crime ; la méthode adoptée associe les outils de la linguistique de corpus et les travaux en stylistique. Il s’agit de montrer comment les structures où apparaît cette expression scène de crime déterminent des traits stylistiques propres au thriller et quels rôles joue alors l’expression dans l’économie narrative de ce sous-genre du roman policier. La spécificité de l’expression scène de crime a été établie à l’aide de méthodes lexico-syntaxiques : la technique d’extraction des arbres lexico-syntaxiques récurrents, fondée sur des seuils de mesure d’association et de fréquence minimum, permet tout d’abord d’identifier ceux qui semblent spécifiques à un sous-genre textuel. Une approche plus stylistique permet ensuite de recontextualiser, sur le plan diachronique, l’apparition de cette expression dans le corpus (fin XXe-début XXIe siècles. On constate que les motifs de mots co-occurrents qui s’organisent autour de scène de crime – sous la forme de structures linguistiques variées (collocations, colligations, phrases nominales – ressortissent à l’expression de la localisation et de l’expertise (en particulier par transposition de l’anglais. Enfin, l’expression scène de crime permet, dans le roman, de passer du récit (découverte du crime à la description (de l’enquête ; elle permet surtout de réactiver le souvenir de la découverte des cadavres et fonctionne alors, en partie par connotations, comme un réservoir d’horreur, une ponctuation participant de l’atmosphère macabre du thriller.

  4. Avaliação de Revestimentos de Liga de Níquel 625 Depositados pelo Processo Eletroescória

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    Soraia Simões Sandes

    Full Text Available Resumo A aplicação de revestimentos de ligas de níquel é comumente realizada na indústria de petróleo e gás para aumento da vida de equipamentos em ambientes agressivos, dado que este procedimento melhora a resistência à corrosão, sem um aumento significativo do custo de produção quando comparado com equipamentos maciços fabricados com outras ligas. Normalmente, as juntas são soldadas pelos processos de eletrodos revestidos, MIG/MAG ou TIG. Neste aspecto, o processo eletroescória realiza deposições com elevada energia de soldagem e baixa diluição, podendo ser uma opção interessante, uma vez que proporciona uma elevada produtividade, permitindo a soldagem com aplicação de apenas uma camada. O presente trabalho avalia propriedades mecânicas, microestruturais e de corrosão de revestimentos de liga de níquel 625 depositada em aço carbono ASTM A516 Grau 70 pelo processo eletroescória, tanto na condição como soldado quanto tratado termicamente. A deposição foi realizada com uma e duas camadas sobre chapas de dimensão 50x400x400 mm, na posição plana e energia de soldagem média de 11,7 kJ/mm. Após a soldagem realizou-se tratamento térmico a 620°C por 10 horas, sendo esta condição comparada ao estado de como soldado. Os ensaios de dobramento não indicaram evidências de defeitos. A avaliação microestrutural realizada por microscopia ótica (MO, eletrônica de varredura (MEV e eletrônica de transmissão (MET mostrou uma microestrutura austenítica para o depósito com pequena fração volumétrica de fases secundárias e o tratamento térmico de alívio de tensões não promoveu mudanças significativas nas propriedades. Na região de grãos grosseiros da zona termicamente afetada (RGGZTA foi observada a ocorrência de ferrita pró-eutetóide, perlita e bainita para o depósito com 1 camada e basicamente ferrita e perlita refinadas para o deposito com 2 passes devido às baixas taxas de resfriamento

  5. Protección contra la corrosión de electrorrecubrimientos níquel/cobre utilizando la técnica PRC

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    William Aperador, Dionisio Laverde, Enrique Vera y Javier Guerrero

    2010-12-01

    Full Text Available Se presenta la implementación de la técnica de corriente pulsante inversa para electrodepositar películas delgadas de Cu-Ni en forma de bicapa sobre sustratos de zamac, controlando  los  voltajes  y  tiempos  de  electrodepósitos anódicos (Vlow, TLow y catódicos (VHight, THight y obteniendo como respuesta el monitoreo de la corriente anódica (ILow y catódica (IHight en función del tiempo anódico (TLow y catódico (THight respectivamente. Se obtuvieron películas de Cu (electrolitos cianurados y Ni (electroli tos  ácidos  con  espesores  entre  18  y  62 micrómetros. Se observó, mediante microscopía de fuerza atómica (AFM, que el control pulsante del voltaje durante el depósito permite obtener películas de Cu/Ni más densas y de mejor granulometría que las películas convencionales depositadas  por  la  técnica  de  corriente  directa.  Se determinó la composición química de las capas usando la sonda  de  difracción  de  rayos X  (EDX;  además,  se realizaron medidas de brillo y microdureza vickers de laúltima capa, correspondiente al níquel.

  6. Influencia de los parámetros de soldeo fuerte en la microestructura y propiedades mecánicas de la unión de la aleación base níquel Hastelloy B2

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    Sotelo, José Carlos

    2014-09-01

    Full Text Available A study of the high vacuum brazing process of solid solution strengthened Hastelloy B2 nickel alloy has been done. A first stage of research has focused on the selection of the most appropriate brazing filler metal to the base material and vacuum furnace brazing process. The influence of welding parameters on joint microstructure constituents, relating the microstructure of the joint to its mechanical properties, has been evaluated. Two gaps of 50 and 200 micrometers, and two dwell times at brazing temperature of 10 and 90 minutes were studied. The braze joint mainly consists of the nickel rich matrix, nickel silicide and ternary compounds. Finally, the results of this study have shown the high bond strength for small gaps and increased dwell times of 90 minutes.Se realizó un estudio pormenorizado del proceso de soldeo fuerte en horno de alto vacío de la aleación base níquel Hastelloy B2 fortalecida por solución sólida. En una primera fase del trabajo se seleccionó el material de aporte acorde al material objeto de unión y a la fuente de calentamiento seleccionada. Posteriormente, se evaluó la influencia del gap (50 y 200 micrómetros y tiempo de permanencia a temperatura de soldeo (10 y 90 minutos sobre los microconstituyentes de la unión, relacionando la microestructura con las propiedades mecánicas de la junta. Los análisis metalográficos mostraron una unión constituida por una matriz rica en níquel, siliciuros de níquel y compuestos ternarios. Finalmente, los resultados de los ensayos mecánicos a esfuerzos cortantes mostraron una elevada resistencia para gaps de 50 micrómetros y tiempos de permanencia de 90 minutos.

  7. In vitro effect of 470 nm LED (Light Emitting Diode in keloid fibroblasts Efeito in vitro do LED (Light Emitting Diode de 470 nm em fibroblastos de quelóide

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    Silvilena Bonatti

    2011-02-01

    Full Text Available Purpose: To quantify keloid fibroblasts after irradiation with 470nm blue LED, in vitro. Methods: Fibroblasts from keloid and adjacent skin have been obtained from 6 patients. Cells have been cultivated and maintained in DMEM culture medium. In Petri dishes, they were irradiated with energy doses of 6J, 12J and 18J. After 24 h, counting was done by the average of the triplicates for each sample. Results: There were no significant differences in the number of irradiated keloid fibroblasts at the studied doses (p=0.261. In adjacent skin fibroblasts, differences were observed (p=0.025 concerning the doses of 18 J and 6 J (p=0.03. Conclusions: There was a reduction in the number of adjacent skin fibroblasts irradiated with 470nm blue LED at the energy dose of 18 J compared to the ones irradiated at the energy dose of 6 J. There were no changes in keloid fibroblasts counting at any of the doses applied, 24 h after irradiation.Objetivo: Quantificar fibroblastos de quelóide após irradiação com LED azul de 470nm, in vitro. Métodos: Foram obtidos fibroblastos de quelóide e pele adjacente, de seis pacientes. As células foram cultivadas e mantidas em meio de cultura DMEM. Em placas de Petri, receberam irradiação com doses de energia de 6J, 12J e 18J. Após 24 horas a contagem foi feita pela média da triplicata para cada amostra. Resultados: Não houve diferença na quantidade de fibroblastos de quelóide irradiados nas doses estudadas (p=0,261. Observou-se diferença nos fibroblastos de pele adjacente (p=0,025, com relação às doses de 18 J e 6 J (p=0,03. Conclusões: Houve redução dos fibroblastos de pele adjacente irradiados com LED azul de 470 nm na dose de energia de 18 J em relação à dose de 6 J. Não houve alteração na quantidade de fibroblastos de quelóide nas doses aplicadas após 24 horas da irradiação.

  8. Batailles professionnelles et enjeux politiques

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    Éric Gobe

    2014-05-01

    Full Text Available Les batailles territoriales que se sont livrées experts comptables et avocats sous le régime de Ben Ali montrent que, dans un contexte autoritaire, les logiques professionnelles et celles du politique sont intimement imbriquées. L’État tunisien a arbitré entre différents intérêts professionnels en fonction des nécessités de la pérennisation du régime autoritaire. Les rapports de force politique entre les différents acteurs, i.e. les gouvernants, le barreau, les experts comptables et les autres professions du chiffre, ont contribué au découpage d’un territoire professionnel perçu comme défavorable par des avocats eux-mêmes appréhendés par le pouvoir comme une profession dangereuse. La « révolution » tunisienne de 2011 a inversé provisoirement les rapports de force en faveur du barreau qui a su tirer parti de la chute du président Ben Ali pour faire aboutir ses revendications et réasseoir son pouvoir professionnel.

  9. Estudio cinético del proceso de precipataión de los sulfuros de níquel y cobalto con hidrógeno sulfuro de sodio, en el licor de desecho (WL

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    Mercedes Sosa-Martínez

    2006-03-01

    Full Text Available En el trabajo se realiza un estudio cinético del proceso de precipitación de sulfuros a partir del licor residual WL que se genera en la Empresa Moa Níckel S. A -Pedro Soto Alba. La investigación se realiza a escala de laboratorio empleando una variante de tratamiento del licor en dos etapas de precipitación a diferentes valores de pH, donde se analiza la influencia de los factores que intervienen en el proceso como la temperatura, concentración de hidrógeno sulfuro de sodio y el régimen de agitación, basado en el método factorial completo donde se conjugan los niveles experimentales de las variables estudiadas respecto al grado de precipitación de los principales elementos níquel cobalto, cinc, y cobre. En la primera etapa se logra obtener una mezcla de sulfuros mixtos ricos en  cobre y cinc con extracciones superiores  a  80 % y 64 % respectivamente, mientras que en la segunda etapa se obtiene un precipitado de color negro correspondiente a los sulfuros de níquel y cobalto cuyas recuperaciones alcanzan valores de 84% y  82%.

  10. Caracterización físico-química y mineralógica de la escoria de fundición de ferroníquel de Moa

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    Yaritza Ramírez-Cruz

    2013-12-01

    Full Text Available La escoria de fundición de ferroníquel obtenida a escala piloto a partir del mineral saprolítico del yacimiento Moa Occidental, se caracterizó desde el punto de vista físico, químico y mineralógico con el objetivo de evaluar sus posibilidades de utilización industrial. Mediante Espectrometría por Fluorescencia de Rayos X y Difracción de Rayos X se constató que en su composición existen fundamentalmente óxidos de silicio y magnesio, con valores promedios de 46% el primero y 37 % el segundo. El olivino, la forsterita y la clinoenstatita se identificaron como sus fases mineralógicas principales. La densidad es de 3,20 g/cm 3 ; temperatura de fusión de 1 650ºC y viscosidad de 6,5 poises. Estos resultados evidenciaron similitud con escorias de ferroníquel obtenidas en otras partes del mundo, que son usadas como material abrasivo, material de construcción y refractario

  11. Efecto de dos metales pesados, cadmio y níquel, sobre la eficiencia de remoción de carga orgánica de un reactor UASB a escala de laboratorio

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    Luis Eduardo Forero

    2004-01-01

    Full Text Available Se realizaron ensayos en tres reactores UASB de tres litros cada uno, a un tiempo de retención hidráulico (TRH de cuatro horas y carga orgánica volumétrica de 4,8 g/L/d. Después de la fase inicial de arranque, tiempo de 4.000 horas para los tres reactores, se procedió a afectarlos de la siguiente forma: el primer reactor fue alimentado con 5 mg/L de cloruro de cadmio en forma continua, el segundo reactor fue alimentado con 10 mg/L de cloruro de níquel en forma continua también, mientras que el tercer reactor no se afectó con sustancia alguna y sirvió como control. La eficiencia de remoción de demanda química de oxígeno (DQO del primer reactor cambió del 60% de la fase de arranque (fase 1 al 18% en la fase afectada con cadmio (fase dos; la eficiencia de remoción de DQO en el reactor dos pasó del 60 al 24% y a su vez para el reactor tres control no hubo cambio significativo en dicha eficiencia. A su vez el reactor uno acumuló el cadmio en el lodo, mientras que el reactor dos no hizo lo propio con el níquel.

  12. Migración de hierro y níquel, y estabilidad oxidativa del aceite refinado de soja calentado en utensilios culinarios de diversos materiales

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    Almeyda Haj-Isa, Niurka Maritza

    2007-12-01

    Full Text Available Cookware may release some inorganic components into foods during cooking, some of which have undesirable consequences. In fried foods, for instance, oil oxidation is favored by metals. The present study evaluated oxidative stability (AOCS method and iron and nickel migration (inductively coupled plasma-optical emission spectrometry into refined soybean oil in four cycles, with intervals of 24 hours. The cookware materials were glass, aluminum, stainless steel, iron and soapstone. The results demonstrated that the lowest metal migration occurred from glass and aluminum pans while the oil heated in these pans showed the highest oxidative stability. The highest migration of Fe and Ni into the oil occurred from the soapstone and iron pots (3.94 and 3.21 mg _ kg-1, respectively.Nevertheless, increasing loss of oxidative stability was evident in the oils heated in the soapstone, stainless steel and iron cookware, in this order. Since iron migration was lower from glass and aluminum pans, these were considered the best type of materials for fryingDurante la elaboración de alimentos los utensilios culinarios pueden liberar componentes inorgánicos ocasionalmente no deseables. La oxidación del aceite es durante la fritura es favorecida por la presencia de metales. Fue evaluada la migración de hierro y níquel (espectrometría de emisión óptica y la estabilidad oxidativa (método AOCS del aceite de soja sometido a cuatro calentamientos con intervalos de 24 horas en cazuelas de vidrio, aluminio, acero inoxidable, hierro y piedra-jabón. La mayor migración de hierro al aceite ocurrió en las cazuelas de hierro (3,94 mg•kg–1 y piedra (3,21 mg _ kg–1, sin diferencia estadística entre ellas. La pérdida progresiva de estabilidad oxidativa fue acentuada en los aceites calentados en utensilios de piedra, acero inoxidable e hierro, en tal orden. Vidrio y aluminio fueron considerados los mejores materiales para la fabricación de cazuelas

  13. Entre culture générale et enjeux des métiers d'ingénieur : la diversité des enseignements en sciences humaines et sociales à l'École Centrale de Lyon

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    Hourcade Nicolas

    2014-01-01

    Full Text Available Ce texte analyse le développement d'enseignements en sciences humaines et sociales à l'École Centrale de Lyon, établissement formant des ingénieurs généralistes. Très limités au milieu des années 1990, les cours de SHS constituent aujourd'hui un aspect significatif de la formation. La première spécificité de cette offre pédagogique est de comprendre un nombre relativement important de cours obligatoires, complétés par des activités optionnelles. Sa seconde particularité est de traiter de thématiques générales à côté de contenus classiques liés aux enjeux des métiers d'ingénieur. Sa troisième caractéristique est de s'appuyer sur une implication de l'équipe SHS dans les activités professionnalisantes, tout en les séparant des enseignements disciplinaires. Enfin, l'inscription des SHS à l'ECL s'effectue plus par l'enseignement que par la recherche, chaque membre de l'équipe étant rattaché à un laboratoire extérieur différent.

  14. La dimension territoriale et politique des circuits courts alimentaires : représentations et enjeux dans le débat européen sur la politique agricole commune

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    JOUEN, Marjorie

    2014-07-01

    Full Text Available En Europe, les circuits courts alimentaires sont devenus des maillons-clés des stratégies de valorisation territoriale. Les nombreuses initiatives déjà recensées montrent à quel point ils reflètent des choix d’organisation et de gouvernance au niveau local, régional et national. Dans le contexte du débat européen sur la politique agricole commune, cet article s’intéresse ici au rôle joué par les pouvoirs publics pour stimuler, accompagner ou encadrer ce mode de commercialisation, et s’interroge sur les présupposés politiques pouvant influencer ces actions.

  15. Dis-moi quels champignons...

    OpenAIRE

    Lévi-Strauss, Claude

    2010-01-01

    Nous croyons tous, ou presque, être amateurs de champignons. Paris a donné son nom à la seule espèce européenne cultivée, le champignon figure à nos menus, c’est une « garniture » prescrite de la cuisine d’apparat. Pourtant, interrogez autour de vous, demandez à vos amis le nombre d’espèces connues et consommées par eux : ils vous parleront du champignon de Paris, du cèpe, de la girolle, de la morille, de la truffe. Bien rares ceux qui iront au-delà. Cette attitude timorée envers les champign...

  16. Efecto del tratamiento térmico posterior sobre la resistencia al desgaste por deslizamiento de un recubrimiento base níquel depositado por HVOF

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    Cadenas, P.

    2007-02-01

    Full Text Available In the present research, a nickel base coating was deposited on an AISI 1020 substrate by using high velocity oxy-fuel technique (HVOF. The coating was subsequently post heat -treated by means of an oxyacetylene flame. For the conditions evaluated in the present study, it was found that the CTT coating has 1,15 better wear resistance for the smaller level of the applied load and nearly 50 times for the highest level of the applied load when compared to the STT coatings. These results have been attributed to a better distribution of the hard phases, better cohesion between particles and an increase in hardness, as consequence of the post heat treatment process. A severe wear regime was found for all the samples since the wear rates presented values which were higher than 1·10-5 mm3/m. For the CTT coatings, the wear mechanism was mainly due to the adhesion and oxidation phenomena, meanwhile for the steel counterpart mechanisms such oxidation, grooving and three body abrasion were observed.

    En el presente trabajo, se depositó un recubrimiento base níquel sobre un acero AISI 1020 por la técnica de termorrociado de alta velocidad que utiliza oxígeno como combustible (High Velocity Oxygen Fuel - HVOF y, posteriormente, fue tratado térmicamente mediante llama oxiacetilénica. Para las condiciones evaluadas en este estudio, se encontró que el recubrimiento CTT tiene desde 1,15 veces más resistencia al desgaste, para el menor nivel de carga aplicada y mayor velocidad de deslizamiento y, hasta 50 veces más resistencia al desgaste para el mayor nivel carga aplicada y mayor velocidad de deslizamiento, comparado con el recubrimiento STT. Estos resultados se atribuyeron a una mejor distribución de las fases endurecedoras, una mejor cohesión entre partículas y un aumento en la microdureza del recubrimiento, como consecuencia del tratamiento térmico posterior. El régimen de desgaste presente en todas las muestras fue severo, ya que las

  17. Morfologia de órgãos genitais femininos de quelônio semi-aquático Mesoclemmys vanderhaegei

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    Walkiria F. Silva

    Full Text Available RESUMO: O Mesoclemmys vanderhaegei (Testudines: Chelidae é um quelônio de água doce cuja ocorrência é descrita nas bacias dos rios Amazonas, Tocantins, Paraguai, Paraná e Uruguai. Consta na lista vermelha de espécies ameaçadas da International Union for Conservation of Nature, como espécie de baixo risco, mas que poderá se tornar ameaçada, sendo necessário a atualização de seus dados ecológicos e biológicos. Considerando que planos de manejo e conservação de espécies dependem também de vasto conhecimento sobre a biologia reprodutiva, apresentamos a primeira descrição macroscópica dos órgãos genitais de fêmeas jovens e adultas de M. vanderhaegei correlacionando esses achados ao tamanho do espécime e ao período do ano. Exemplares de M. vanderhaegei foram coletados no município de Chapada dos Guimarães, área de ampla ocorrência natural da espécie. A descrição dos órgãos genitais foi realizada a partir de 17 fêmeas fixadas em formol a 10% e dissecadas para evidenciação de particularidades relacionadas à anatomia externa e interna. Os órgãos genitais M. vanderhaegei jovens e adultas são constituídos por pares de ovários e ovidutos que desembocam dorsolateralmente na cloaca, formando junto com o ureter a papila urogenital. Os ovários são órgãos alongados, com a extremidade cranial mais larga e caudal afunilada, já os ovidutos são longos e localizados lateralmente aos ovários, sendo em adultas, muito diferenciado na sua forma e tamanho em relação ao das jovens. Em ambas faixas etárias, os órgãos genitais são sustentados por pregas de membrana celomática que emergem do teto da cavidade, constituindo os mesovário e mesoviduto. De acordo com a forma e o padrão de mucosa do oviduto em fêmeas adultas, o segmento cranial corresponde as regiões do infundíbulo e magnum, o segmento médio, ao istmo e no caudal identificam-se as regiões útero e vagina. No assoalho do urodeum aloja-se o clit

  18. Estrés producido por sedimentos contaminados con níquel en una granja de trucha arcoiris, Oncorhynchus mykiss (Pisces: Salmonidae

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    Laura Martínez-Tabche

    2002-12-01

    Full Text Available Estudios previos indicaron la presencia de elevadas concentraciones de níquel (Ni en los estanques de la granja "El Truchón", por tal motivo fue necesario establecer correlaciones entre las propiedades fisicoquímicas de los sedimentos de este embalse y el daño que puede producirse sobre la trucha arcoiris cuyo cultivo se lleva a cabo en un reservorio denominado rústico. El estudio se inició con la determinación de las propiedades fisicoquímicas de los sedimentos de la granja, las cuales incluyeron: composición granular, porcentaje de nitrógeno total, contenido de materia orgánica, pH, potencial redox, capacidad de intercambio canónico y la concentración de Ni. Se determinó la CLSO del Ni-96 H sobre Oncorhynchus mykiss en el sistema agua-sedimentos de la granja-metal al equilibrio. En este mismo sistema se evaluó la toxicidad subletal del Ni, mediante la determinación de niveles de metalotioneina (MT, la actividad de la o-desmetilasa (OD y la concentración de proteínas. Los resultados muestran un incremento significativo en los tres parámetros bioquímicos, observándose una relación linear entre efecto y concentración del Ni, por lo que estos biomarcadores de daño se recomiendan para evaluar la toxicidad del Ni. Probablemente estos efectos se deban a las propiedades fisicoquímicas del sedimento que le confiere alta capacidad de absorber el metal. De acuerdo a los resultados obtenidos en este estudio se sugiere al truticultor no emplear estanques rústicos, sino aquellos revestidos de concreto, para evitar la acumulación de sustancias tóxicas o bien realizar remociones periódicas de su sedimento.Previous studies indicated the presence of high concentrations of nickel in the "El truchón" ponds (in México, so it was necessary to find a possible correlation between sediment physicochemical properties of this water body and the damage that could be produced on the rainbow trout which culture is done in a rustic reservoir

  19. Optimisation structurelle des systemes energetiques

    Science.gov (United States)

    Saloux, Etienne

    The development of renewable energies is growing over the last decade to face environmental issues due to the world fossil fuel consumption increase. These energies are highly involved in houses and commercial buildings and numerous systems have been proposed to meet their energy demand. Therefore, improving both efficiency and use of systems, i.e. improving energy management, appears essential to limit the ecological footprint of humanity on the planet. However, system integration yields a very complex problem to be solved due to the large number of units and theirs technology, size, working conditions and interconnections. This situation highlights the lack of systematic analysis for comparing integrated system performance and for correctly pointing out their potential. As a result, the objective of this thesis is to develop and to present such a method, in other words the structural optimization of energy systems. It will be helpful to choose the optimal equipment by identifying all the possibilities of system arrangements and for comparing their performance. Combinations have then been subjected to environmental (climate), structural (available area) and economical constrains while assessment criteria have considered both energy, economic and ecological aspects. For that reason, as well as energy and economic analyses, the exergy concept has also been applied to the equipment. Nevertheless, the high degree of complexity of integrated systems and the tedious numerical calculations make the resolution by using standard software very difficult. It is clear that the whole optimization project would be considerable and the aim is to develop models and optimization tools. First of all, an exhaustive review of energy equipment including photovoltaic panels, solar collectors, heat pumps and thermal energy storage systems, has been performed. Afterwards, energy and exergy models have been developed and tested for two specific energy scenarios: a) a solar assisted heat pump using ice and warm water storages and b) an ambient air heat pump associated to photovoltaic panels. A superstructure has then been constructed to account for every system combination possibility. The different energy paths have been illustrated while irreversibility along every path is identified. Thus, it allows the system operation to be clearly understood. Besides, an exergy diagram has been developed and permits energy and exergy assessment of system and system arrangements to be not only identified but also quantified and separated depending on their (renewable or non-renewable) source. Finally, dimensions and operation variables have been optimized according to exergy and economic criteria for the aforementioned scenarios; the potential of each energy option has been estimated and yield a better energy management to be reached.

  20. Léz-ards plastiques: en arts plastiques, quels sont les éléments nécessaires au développement des enfants de un à cinq ans

    OpenAIRE

    Vianin, Mégane; Rosell-Curty, Catherine

    2016-01-01

    Afin de rédiger ce travail de mémoire sur la thématique des arts plastiques dont la question de départ était formulée ainsi : « En arts plastiques, quels sont les éléments nécessaires au développement des enfants de un à cinq ans ? », deux entretiens ont été menés. À travers cette recherche, il en est ressorti qu’en arts plastiques, les conditions idéales pour parvenir au succès d’une activité ou d’un projet sont les suivantes : préparer le lieu, tenir compte de l’heure, instaurer des ro...

  1. Acumulación de metales (cadmio, zinc, cobre, cromo, níquel y plomo) en especies del género Pelargonium, suministro desde el suelo, ubicación en la planta y toxicidad

    OpenAIRE

    Orroño, Daniela Inés

    2011-01-01

    La acción antrópica puede causar la contaminación de los suelos con metales. Para la remediación de pequeñas áreas contaminadas se sugirió el uso de plantas ornamentales. En esta tesis, inicialmente se estudió la capacidad de fitorremediación de tres especies del género Pelargonium en un suelo contaminado con cadmio, zinc, cobre, cromo, níquel y plomo, y se seleccionó la más tolerante (Pelargonium hortorum). Los objetivos fueron estudiar en qué fracciones químicas y físicas del suelo se ubica...

  2. Modelo matemático del proceso de calcinación del carbonato básico de níquel (cbn en el horno tubular rotatorio

    Directory of Open Access Journals (Sweden)

    José Luis Sevila-Rodríguez

    2000-03-01

    Full Text Available El presente trabajo recoge los resultados de los autores en lo relacionado con la modelación matemática del proceso de calcinación del carbonato básico de níquel en el horno tubular rotatorio. Se exponen las ecuaciones que conforman el modelo y la fundamentación científica sobre la cual fueron obtenidas. La modelación se basa principalmente en el planteamiento de las ecuaciones del balance material y energético en forma dinámica, que lleva a la obtención de un sistema de ecuaciones diferenciales en derivadas parciales, las cuales se complementan con otras ecuaciones algebraicas que establecen la relación entre los diferentes coeficientes y parámetros físicos.

  3. Dermatite de contato por metais: prevalência de sensibilização ao níquel, cobalto e cromo Metal contact dermatitis: prevalence of sensitization to nickel, cobalt and chromium

    Directory of Open Access Journals (Sweden)

    Ida Duarte

    2005-04-01

    Full Text Available FUNDAMENTOS: Dermatite de contato (DC por metais é dermatose comum em diversos grupos populacionais. OBJETIVOS: Caracterizar o grupo com DC ao níquel, cromo e cobalto na população estudada, determinar a prevalência da sensibilização aos mesmos, verificar as combinações de testes positivos e comparar com a literatura. CASUÍSTICAS E MÉTODOS: Foram realizados testes epicutâneos em 1.208 pacientes com hipótese diagnóstica de DC. Selecionaram-se aqueles com testes positivos aos metais. RESULTADOS: Obtiveram-se 404 pacientes (33,5% da amostra com pelo menos um teste positivo ao níquel e/ou cobalto e/ou cromo. Foram 487 testes positivos a metais, correspondendo a 48% de todos os testes positivos. A maioria dos pacientes era do sexo feminino (72%, de cor branca (54%, com idade entre 40 e 49 anos (25% empregada na área de limpeza (59%. Dos 404, 329 (81,5% foram positivos a apenas um tipo de metal, sendo 60% com teste positivo ao níquel, 13% ao cromo e 8,5% ao cobalto. Cerca de 18,5% apresentaram testes positivos a dois ou três metais, sendo a associação níquel/cobalto a mais comum. CONCLUSÕES: A sensibilização aos metais foi de 48%, entre os testes positivos e ocorreu principalmente em mulheres da cor branca, na faixa etária de 40 a 49 anos e sem correlação ocupacional. A maioria apresentou sensibilização a apenas um metal. Esses dados são semelhantes aos de outros trabalhos já publicados.BACKGROUND: Metal contact dermatitis (nickel, cobalt and chromium is a common dermatosis among several population groups. OBJECTIVE: To describe the individuals with metal contact dermatitis in the group studied, to determine the prevalence of skin sensitization by nickel, cobalt and chromium, to verify the positive test combinations among these three substances and to compare our results with the literature. PATIENTS AND METHODS: Patch test was performed in 1208 patients with a presumptive diagnosis of contact dermatitis. Those with

  4. Evaluación de la resistencia a la corrosión erosión de recubrimientos de níquel modificados con nanopartículas de diamante

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    Luz Amira Torres Medina

    2010-01-01

    Full Text Available La incorporación de nanopartículas de carburos, nitruros, óxidos o diamante en una matriz metálica, generalmente muestran mejoras en la dureza, en la resistencia al desgaste y a la corrosión, comparado con un recubrimiento del metal puro. Estos recubrimientos compuestos se pueden obtener mediante la técnica de electrodeposición, logrando economía y calidad en los depósitos. Los recubrimientos de níquel modificados con nanopartículas de diamante (Ni-D, fueron aplicados sobre un acero AISI SAE 1016 mediante la técnica de electrodeposición desde una solución típica Watts sin aditivos, que contiene nanopartículas de diamante. El efecto que ejercen algunas variables que intervienen en el proceso de electrodeposición como: densidad de corriente, velocidad de agitación y concentración de partículas en el baño, en la dureza y en la resistencia a la corrosión-erosión, se estudiaron mediante un diseño factorial completamente aleatorizado 2k. La resistencia a la corrosión- erosión se evaluó mediante el monitoreo del potencial de corrosión de las probetas con recubrimiento sometidas a un fluido corrosivo y abrasivo en movimiento. Los recubrimientos compuestos de Ni-D obtenidos presentan mejor resistencia a la corrosión-erosión que los recubrimientos de níquel puro. Los recubrimientos más resistentes a la corrosión-erosión fueron los obtenidos a 5 A/dm², 900 rpm y 10 g/L de diamante.

  5. Biossorção de níquel e cromo de um efluente de galvanoplastia utilizando alga marinha pré-tratada em coluna - DOI: 10.4025/actascitechnol.v31i2.864

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    Márcia Teresinha Veit

    2009-06-01

    Full Text Available Este trabalho teve por objetivo o estudo da biossorção dos íons cromo e níquel presentes no efluente do processo de uma indústria de galvanoplastia, utilizando como biossorvente a biomassa de alga marinha pré-tratada Sargassum filipendula. As condições de operação da coluna foram: massa de biossorvente de 8 g, pH do efluente de alimentação 3,85, temperatura de 30ºC, vazão de 6 mL min.-1 e concentrações iniciais de alimentação (cromo+níquel de 7,12 e 3,66 meq L-1. Foi empregado um modelo matemático para representar a dinâmica da biossorção em coluna de leito fixo. O modelo da isoterma multicomponente de Langmuir (qm= 2,78 meq g-1, bCr = 0,85 L meq-1, bNi = 0,08 L meq-1 foi utilizado para representar os dados de equilíbrio da coluna e para simular a dinâmica de biossorção dos íons. Os resultados da simulação demonstraram que o modelo matemático empregado foi capaz de descrever satisfatoriamente a complexa dinâmica de biossorção dos íons presentes no efluente.

  6. Preparação e caracterização do compósito PVDF/Pani com partículas de níquel

    Directory of Open Access Journals (Sweden)

    Gabriel da Cruz Dias

    Full Text Available Resumo Neste trabalho partículas de níquel foram incorporadas através da mistura física do pó resultante da mistura PVDF/Pani obtido por síntese química. Filmes homogêneos foram obtidos através da prensagem a temperatura de 180°C. A partir dos resultados pode-se notar alterações favoráveis e desfavoráveis nas propriedades do compósito após a incorporação e como estas tornam-se dependentes da incorporação. Os resultados de difratometria apresentaram picos característicos tanto da fase α da matriz polimérica e das partículas de níquel, e juntamente com as analises térmicas, que não há alteração na estrutura conformacional e a configuracional. Mesmo apresentando uma boa estabilidade térmica a incorporação indica que além da presença do polímero condutor como o aumento de partículas são prejudiciais às propriedades mecânicas finais da amostra. As micrografias apresentam as partículas de forma dispersas ao longo do filme e determinantes para os valores de condutividade elétrica e obtenção de uma fase magnética.

  7. La qualité des plages au cœur des enjeux de développement : La situation des îles de l’océan Indien

    Directory of Open Access Journals (Sweden)

    Virginie Duvat

    2009-02-01

    Full Text Available La qualité des plages s’inscrit au cœur des enjeux de développement des petites îles tropicales en raison d’une part, de la place qu’elle occupe dans les stratégies de promotion touristique, et d’autre part, de l’importance que prend le littoral dans les pratiques récréatives et touristiques émergentes des populations locales. Dans ce contexte, l’objectif de cet article est de présenter les résultats d’une évaluation réalisée dans différentes îles des archipels des Seychelles et des Mascareignes, et de mettre en évidence la relation qui existe entre la qualité des plages, leurs attributs naturels et les politiques d’aménagement et de gestion des acteurs publics et privés.Today, the quality of the tropical beaches is closely linked to development challenges for two main reasons. At first, because sandy beaches play an important role in tourism development policies, and secondly because of the emergence of the touristic and recreative activities of the local communities. In this context, the purpose of this paper is to expose the results of an assessment which was done in the Seychelles and Mascarene islands and to highlight the relationship which can be observed between beach quality, natural assets and the strategies of public and private actors.

  8. Construire une conception scientifique du vivant avec des élèves de 5-7 ans : approche didactique pour mieux comprendre les processus d’apprentissage et les enjeux développementaux

    Directory of Open Access Journals (Sweden)

    Grancher Céline

    2015-01-01

    Full Text Available Cet article s’intéresse au vivant en tant qu’objet de savoir et aux phénomènes d’enseignement-apprentissage de ce concept au début de l’école primaire en France (élèves de 5-7 ans, classes de CP-CE1. Nous nous interrogeons sur les contenus à enseigner et les situations possibles à mettre en oeuvre dans les classes pour que des élèves construisent une conception scientifique du vivant. Nous délimitons d’abord le concept de vivant dans une perspective d’enseignement à de jeunes élèves. Puis nous identifions un des enjeux de l’enseignement-apprentissage du vivant : permettre aux élèves de construire un autre rapport au vivant que celui de la vie de tous les jours. Nous abordons les situations scolaires comme des processus d’acculturation scientifique scolaire. Les élèves sont en effet incités à entrer dans une culture scientifique en s’appropriant à la fois des savoirs relatifs au vivant et des pratiques de la biologie. À partir de deux séquences d’enseignement réalisées en CP puis en CE1 avec les mêmes élèves, nous repérons des indicateurs qui témoignent de la construction d’une conception scientifique du vivant par les élèves. Nous montrons également que les processus d’acculturation scientifique dans lesquels les élèves sont engagés ont des effets sur leur développement.

  9. La calidad de la información en el proceso de automatización de la minería del níquel en Cuba

    Directory of Open Access Journals (Sweden)

    Juana M. Laborde-Chacón

    2003-03-01

    Full Text Available Enfocado hacia la automatización, se analizan los aspectos cualitativos que definen la calidad de la información utilizada en las actividades de la minería cubana del níquel, y se destacan en primer lugar los criterios para la clasificación de esta información, así como los elementos por considerar a fin de definir el formato, organización y herramientas para la manipulación de la misma. En segundo lugar, son valorados los aspectos básicos que garantizan la fiabilidad de la información y la capacidad del personal técnico, geólogo y minero, para relacionarse con la información en computadoras; se argumenta la necesidad de crear en cada mina un Grupo de Gestión de Datos y de Informatización. Finalmente, se definen los conceptos de Información Disponible, Información Visible e Información Oculta, a la vez que se plantean las formas más comunes de acceso a la información y la protección de la misma.

  10. Aspectos metalúrgicos de revestimentos dissimilares com a superliga à base de níquel inconel 625 Metallurgical aspects of dissimilar weld overlays of inconel 625 nickel based superalloys

    Directory of Open Access Journals (Sweden)

    Cleiton Carvalho Silva

    2012-09-01

    Full Text Available Prolongar a vida útil e aumentar a confiabilidade de equipamentos e tubulações de plantas de produção e processamento de petróleo é uma busca constante no setor de petróleo e gás. Tais aspectos dependem essencialmente do uso de ligas resistentes à corrosão. Neste contexto, a soldagem de revestimento com superligas à base de níquel tem sido uma alternativa interessante, pois confere aos equipamentos uma alta resistência à corrosão com um custo inferior, se comparado à fabricação de componentes ou tubulações maciças com superligas. Assim, o objetivo do presente trabalho foi investigar o comportamento metalúrgico de revestimento de superliga à base de níquel do tipo Inconel 625 depositados pelo processo TIG com alimentação de arame frio. As soldagens foram realizadas em uma bancada robotizada, empregando uma fonte eletrônica de soldagem com sistema de aquisição de dados para o monitoramento dos sinais de corrente e tensão. A caracterização microestrutural foi realizada através das técnicas de microscopia eletrônica de varredura (MEV e transmissão (MET, espectroscopia de energia dispersiva de raios-X (EDS. Os resultados mostraram que a microestrutura do metal de solda foi constituída por uma matriz γ com fases secundárias ricas em Nb. Foi encontrada a formação de precipitados complexos de carbonetos/nitretos de Ti e Nb.To extend the life and reliability of pipes and equipment in oil & gas production and processing settings is a continuous demand. These aspects are essentially dependent on corrosion resistant alloys used. In this context, the weld overlay with Ni-based superalloys is a great interesting alternative, since improve the corrosion resistance without increase the cost of manufacture when compared to massive equipment. Thus, the objective of this study was to evaluate the metallurgical aspects of Inconel 625 weld overlays deposited by GTAW cold wire feed process. The welds were performed using a

  11. OXIDACIÓN DE LA SUPERFICIE DE CARBÓN ACTIVADO MEDIANTEHNO3 Y H2O2: EFECTO SOBRE LA REMOCIÓN DE NÍQUEL (IIEN SOLUCIÓN ACUOSA

    Directory of Open Access Journals (Sweden)

    Paola Rodriguez estupiñan

    2011-11-01

    Full Text Available Este trabajo analiza el efecto de la modificaciónde la química superficial deun carbón activado granular, CAG, poroxidación con ácido nítrico, CAG-N,y peróxido de hidrogeno, CAG-P en laadsorción de iones níquel desde soluciónacuosa.Las muestras obtenidas se caracterizarona través de diferentes técnicas; laquímica superficial se evaluó por determinacionesde acidez y basicidad total,punto de carga cero y espectroscopia IR,que muestran el efecto del agente oxidante.Los parámetros texturales, como áreasuperficial BET y volúmenes de poro, seevaluaron mediante adsorción de gases.Los valores de área superficial BET delos sólidos se encuentran entre 816 y 876m2g-1, adicionalmente se determinaronentalpías de inmersión de los carbonesactivados en agua y benceno.Finalmente, los resultados experimentalesde la adsorción desde soluciónse ajustaron a los modelos de Langmuir,Freundlich, Redlich-Peterson y Toth,y se encontró el mejor ajuste para esteúltimo. Los valores de la capacidad deadsorción determinadas por el modelo deLangmuir están entre 29,68 y 50,97 mgg-1, lo que indica que la capacidad de adsorcióndepende, en gran medida, de laquímica superficial del sólido.

  12. TEORES DE DIMETIL SULFETO ESTIMADOS PELO MÉTODO NÍQUEL-RANEY E ACEITABILIDADE DE AMOSTRAS DE CACHAÇA Dimethyl sulfide contents estimated by Ni-Raney method and “cachaça” samples acceptability.

    Directory of Open Access Journals (Sweden)

    J. F. A. TOLEDO

    2008-08-01

    Full Text Available

    O defeito sensorial das aguardentes de cana destiladas na ausência de cobre já foi relacionado com a presença do dimetil sulfeto (DMS, o que revela a importância de identificar os teores deste composto eventualmente presente nesta bebida. Considerando-se, porém, o custo relativamente elevado dos métodos de cromatografia de fase gasosa até agora utilizados na determinação do DMS, foi objetivo deste trabalho avaliar a possível utilização do método de Níquel-Raney como forma de controlar o referido defeito. Nesse sentido foi estudada a relação entre os teores de DMS estimados pelo método proposto, com sua influência sensorial avaliada através de testes de aceitação. Os resultados obtidos permitiram concluir que mesmo em concentrações abaixo de 5mg/L, os testes sensoriais revelam haver alta correlação entre os teores de DMS, determinados pelo método de Níquel-Raney com a diminuição da qualidade sensorial das amostras avaliadas. Os resultados obtidos permitem propor o método de Níquel-Raney como uma opção válida no controle da presença de DMS na cachaça e assim, prevenir efeitos negativos na qualidade sensorial do produto final.

    The sensory defect of “cachaça”, when distilled in absence of copper, had been already related to dimethyl sulphide levels, pointing out the importance to control its contents in this beverage. Considering the relatively higher costs of the gas-chromatography techniques, the aim of this work was to evaluate the possible use of the Níquel-Raney method, to control the dimethyl sulphide contents. In this way, the dimethyl sulphide contents (estimated by Níquel-Raney method and its sensory deffect evaluated by acceptability sensory tests, were compared. The results showed that

  13. Apical displacement produced by rotary nickel-titanium instruments and stainless steel files Deslocamento apical produzido por instrumentos de níquel-titânio acionados a motor e limas de aço inoxidável

    Directory of Open Access Journals (Sweden)

    José Roberto Vanni

    2004-03-01

    Full Text Available The aim of this study was to evaluate the apical displacement produced by different rotary nickel-titanium instruments, testing the hypothesis that rotary systems with nickel-titanium instruments produce lower mean values of apical displacement than stainless steel hand instruments. A total of 100 maxillary permanent first molars were selected for the study. The mesiobuccal roots were sectioned at the top cervical third and embedded in blocks of self-curing resin. The specimens were randomly divided into 5 groups and the root canals were prepared using the following nickel-titanium instruments: Group 1 - Quantec system 2000 (Analytic Endodontics, Mexico; Group 2 - Pro-File T.0.04 (Dentsply/Maillefer, Switzerland; Group 3 - Pro-File Series 29 T.0.04 (Dentsply Tulsa, Switzerland; Group 4 - Pow-R T.0.02 (Moyco-Union Broach, USA. Specimens in Group 5 were prepared using stainless steel hand instruments Flexofile (Dentsply/Maillefer, Switzerland. All root canals were previously submitted to cervical preparation using Orifice Shaper instruments #1, 2, 3 and 4 (Dentsply/Maillefer, Switzerland. After odontometry, the remaining root canal was shaped employing increasingly larger instruments, so that the final instrument corresponded to Quantec #9, Pro-File Series 29 #6, and #35 for the other groups. Specimens in Groups 1 to 4 were prepared using an electric handpiece with 16:1 reduction at 350 rpm. The specimens in Group 5 were manually prepared. Apical displacement was measured and recorded by means of radiographic superimposition on a specific desk. Statistical analysis (ANOVA of the results revealed that all groups presented apical displacements. Considering only the nickel-titanium instruments, Group 4 showed the lowest mean value while Groups 2 and 3 produced the highest mean apical displacement values (pO objetivo deste trabalho foi avaliar o deslocamento apical produzido por diferentes instrumentos de níquel-titânio acionadas a motor testando a

  14. Remoção de níquel(II de soluções aquosas pela biomassa Sargassum filipendula em múltiplos ciclos de sorção-dessorção - DOI: 10.4025/actascitechnol.v31i1.840

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    Araceli Aparecida Seolatto

    2009-04-01

    Full Text Available Foi estudado o desempenho da alga marinha Sargassum filipendula na remoção de níquel de uma solução de concentração de 50 mg L-1 em pH 3,5, em colunas de leito fixo que operam em ciclos de adsorção/dessorção. Foram testados dois sistemas de eluição; o primeiro operou com a passagem direta e o segundo com a recirculação do eluente. Em seguida, foram realizados dez ciclos consecutivos de sorção-dessorção em duas colunas de leito fixo, uma regenerada com o eluente H2SO4 (0,1 M e outra com MgSO4/H2SO4 (pH 3, em sistema de recirculação do eluente. As etapas de sorção e dessorção foram realizadas em 30 e 2h, respectivamente, representando 20 dias de uso contínuo da biomassa. Foi observada alta quantidade recuperada de níquel nas etapas de eluição (aproximadamente 95%. Ao final do décimo ciclo, verificou-se que a alga Sargassum filipendula continuava apresentando valores elevados da capacidade de remoção de níquel da solução, mostrando-se como alternativa eficiente de tratamento de águas residuárias contendo metais. A regeneração da biomassa apresentou baixo custo, além de ter facilitado o processo de tratamento que dispensou trocas sucessivas da biomassa.

  15. Hamster (Mesocricetus auratus cheek pouch as an experimental model to investigate human skin and keloid heterologous graft Bolsa jugal no hamster (Mesocricetus auratus como modelo experimental de investigação de enxertos heterólogos de pele humana e quelóide

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    Bernardo Hochman

    2004-12-01

    Full Text Available To describe the integration process of grafts of total human skin and keloid in hamster (Mesocricetus auratus cheek pouch, whose sub-epithelium is naturally an "Immunologically Privileged Site". Fragments of human normal skin and keloid from the breast region of mulatto female patients were transplanted into the cheek pouch subepithelium in situ. Surgical procedure and grafted pouches for microscopic exam at several time points of the transplantation were standardized. The integration of grafted fragments of human skin and keloid was seen in late periods (84 days since the microscopic assessment showed the presence of blood vases within the conjunctive tissue of grafted fragments. It was also possible to see among the grafted fragments the epithelium, the appearing of early cellular infiltrated, epithelial secretion of keratin, the presence of melanocytes, and delayed changes on the aspect of collagen fibers of conjunctive tissue. Pooled results allow to define hamster cheek pouch sub-epithelium as an experimental model to investigating heterologous graft physiology of human total skin and keloid with epithelium.Descrever a integração dos enxertos de pele total humana e quelóide na bolsa jugal do hamster (Mesocricetus auratus, cujo subepitélio é, naturalmente, um "Local de Privilégio Imunológico". Foram transplantados fragmentos, de pele humana normal e de quelóide, obtidos da região mamária de pacientes pardas, no subepitélio da bolsa jugal in situ. O procedimento operatório, e de preparo das bolsas enxertadas para exame microscópico em vários períodos de transplante, foi padronizado. Verificou-se a integração dos fragmentos enxertados de pele humana e de quelóide em períodos tardios (84 dias, uma vez que a avaliação microscópica revelou a presença de vasos sangüíneos no tecido conjuntivo dos fragmentos enxertados. Foi também possível observar, nos fragmentos enxertados, o epitélio, o aparecimento de infiltrado

  16. Le djihadisme au Sahel : enjeux et perspectives

    African Journals Online (AJOL)

    religieux, mais aussi dans la vie politique économique et, bien sûr, culturelle ..... vont se charger de propager les idées et de recruter des combattants ou des ..... africaines ont véritablement manqué de stratégie à ce niveau, trop prisonnières.

  17. Fondements du projet urbain ; enjeux et processus

    OpenAIRE

    Tabouret , René

    1989-01-01

    Ce rapport retrace l’émergence et la formalisation progressive du concept de projet urbain dans le cadre de l’Ecole d’Architecture de Strasbourg sur une décennie (1978-1988), à l’épreuve de projets contrastés (villes de Mulhouse, St Denis, Strasbourg) et de la participation au Seminario Internazionale de Arquitectura Contemporanea (sessions de Barcelone, Naples et Belfort). La projet urbain y est identifié comme ‘intervention dans le processus complexe de (trans)formation de la ville’ ; ceci ...

  18. Amenagements sportifs et developpement durable : Des enjeux ...

    African Journals Online (AJOL)

    ... contredite » éprouvée par (Jeu, 1977), comme l'apanage d'une double hybridation culturelle des pays en développement. Derrière l'apparence de la dislocation des héritages, doit émerger une définition nouvelle sur les rapports que les sports devraient entretenir avec l'environnement pour un développement durable.

  19. Agriculture et changement climatique: enjeux et solutions

    Directory of Open Access Journals (Sweden)

    Mergeai, G.

    2015-01-01

    Full Text Available Agriculture and Climate Change: Challenges and Solutions. According to the latest report from the Intergovernmental Panel on Climate Change (IPCC, climate change is already having a significant impact on agriculture. Several models highlight the increasingly negative effects of increased temperatures on crop yields and livestock farming in developing countries. These impacts can be caused by negative physiological effects for plants and animals, which result from higher temperatures or the proliferation of pests and diseases caused by the latter. The increased number of extreme weather events, especially floods, and changing precipitation patterns are linked to climate changes. These factors dramatically affect the crop production potential of agricultural land. Populations in the developing world, which are already vulnerable and exposed to food insecurity, are the most seriously affected. In many countries in the southern hemisphere, agriculture actually represents the main source of income for a major proportion of the active population. Combined with increased demographic pressure, climate changes therefore help to exacerbate the pressure on global food systems. In addition, it should be noted that agriculture also plays a key role in the reduction of greenhouse gas emissions and is therefore at the heart of a variety of complex issues. In light of these facts, it is essential that we make every effort to identify solutions, aimed at adapting to climate changes and alleviating the contribution of certain agricultural practices to the latter, in order to respond to all the challenges that they create. This involves reinforcing research initiatives aimed at understanding and quantifying the problems, while identifying steps that need to be taken in order to limit these problems. It also involves lobbying for appropriate policies to be put into place, based on the results of this research. Last but not least, it involves developing field projects in order to identify and promote appropriate farming practices and create conditions that will help them become more widespread. With this in mind, we welcome the Montpellier Declaration initiative (http://csa2015.cirad.fr, which was developed at the Third Global Science Conference on Climate Smart Agriculture (Climate Smart Agriculture 2015 that was held in this city on 16-18 March 2015. At this event, over 600 research scientists and 150 stakeholders/policy makers - from 75 countries and 5 continents – confirmed that climate smart agriculture has become a benchmark, which creates synergies and may lead to innovative and global solutions at local, regional and international level. The participants also confirmed that climate smart solutions exist and could become a reality if the conditions and public policies lend themselves to these solutions. We encourage all readers of Tropicultura to learn more about the work completed at this conference, in order to understand issues linked to climate change and identify sources of inspiration, so that we can overcome the constraints that it imposes.

  20. Minimização de defeitos em revestimentos de superligas de níquel depositada pelo processo TIG com alimentação de arame frio

    Directory of Open Access Journals (Sweden)

    Cleiton Carvalho Silva

    2014-12-01

    Full Text Available O objetivo do presente trabalho foi avaliar a influência dos parâmetros de soldagem na formação de defeitos na soldagem de revestimentos com ligas à base de níquel, e sua possível eliminação através do correto ajuste dos referidos parâmetros. Para tanto, foram depositados revestimentos com as ligas à base de Ni do tipo Inconel 625, Hastelloy C276 e Inconel 686, sobre um substrato de aço C-Mn, através do processo TIG com alimentação de arame frio. O planejamento dos experimentos foi realizado aplicando-se o método Taguchi. Os fatores de controle avaliados foram a Técnica da energia (TE, o nível de energia de soldagem (E, o tipo de liga (L, o gás de proteção (G e o tipo de tecimento (T. Outros parâmetros foram mantidos constantes, tendo sido investigados previamente. Os resultados mostraram que o tipo de tecimento em espiral, embora contribua significativamente para a redução da diluição, causa uma forte instabilidade ao processo, resultando na maioria dos casos em defeitos superficiais ou defeitos entre passes. A condição ótima para evitar a formação de defeitos entre passes identificada pelo método Taguchi foi constituída pelas seguintes combinação de fatores de controle 2-2-2-3-3, ou seja: TE-I; Emédia; Liga Hastelloy C276; Gás de proteção Ar+He; Tecimento Duplo-8. A condição ótima para a soldagem sem defeitos resulta em alto nível de diluição não sendo indicada para a soldagem de revestimentos resistentes à corrosão.

  1. Resistência à torção de dois instrumentos endodônticos rotatórios de níquel-titânio Torsional resistance of two nickel-titanium rotatory endodontic instruments

    Directory of Open Access Journals (Sweden)

    Cristiane da COSTA

    2000-06-01

    Full Text Available Os autores compararam a resistência à torção entre os instrumentos rotatórios de níquel-titânio Quantec Series 2000 e Pow-R, valendo-se de quarenta instrumentos para cada marca divididos em oito para cada um dos seguintes tamanhos nº 15, nº 20, nº 25, nº 35 e nº 40 com 21 mm e conicidade .02. Com a ajuda de um troptômetro modificado cada instrumento foi fixado em um madril e preso à 3 mm de sua ponta, previamente marcada com uma caneta de tinta permanente, na base do aparelho por uma morsa. Em seguida ativou-se a manivela que continha a escala em graus até notar-se sinal característico da fratura do instrumento registrando-se o valor da quantidade de movimento até este momento. Após tabulação dos dados procedeu-se a análise estatística de acordo com o teste t de Student com nível de significância de 1%. Os resultados mostraram haver diferença estatisticamente significante ao comparar-se limas de mesmo número confrontadas as duas marcas, favorável para o instrumento Pow-R.The authors compared the torsional resistance between the Quantec Series 2000 and Pow-R nickel-titanium rotatory instruments, using forty instruments of each brand, divided in eight of each one of the following numbers: nº 15, nº 20, nº 25, nº 35 and nº 40 with 21 mm and taper .02. Each instrument was fixed in the mandrel of a modified tropometer and held 3 mm away from its tip, on a spot that had been previously stamped with a permanent ink pen, by apprehension claws localized on the base of the equipment. Then the graduated handle was activated until a characteristic break sign of the instrument was noticed, the quantity of movement up to this moment being recorded. After the values were tabulated, the statistical analysis was carried out according to the Student t test. The results revealed a statistically significant difference when instruments of the same number, from both evaluated brands, were compared, favouring the Pow-R instruments.

  2. CARACTERIZACIÓN TRIBOLÓGICA DE RECUBRIMIENTOS DE NÍQUEL QUÍMICO-TEFLÓN OBTENIDOS EN UN BAÑO CON DIFERENTES PERÍODOS DE ENVEJECIMIENTO

    Directory of Open Access Journals (Sweden)

    Maryory Astrid Gómez

    2007-12-01

    Full Text Available Los recubrimientos de níquel químico (NQ constituyen un tratamiento superficial de altas prestaciones funcionales. La incorporación de micropartículas de teflón (PTFE da lugar a la formación de un "composite" (NQ-PTFE consistente en partículas de teflón (PTFE de tamaño micrométrico, uniformemente embebidas en una matriz de NQ. De esta manera, el recubrimiento resultante combina las propiedades de dureza del NQ con las excelentes propiedades de lubricación del teflón. En el presente trabajo se presentan los resultados de la caracterización tribológica de diferentes recubrimientos con la estructura sustrato NQ/NQ-PTFE depositados sobre acero al carbono, con una proporción de teflón presente en el NQ-PTFE de alrededor del 20 %. Los ensayos se realizaron en un tribómetro de bola sobre disco contra bola de alúmina, mediante los cuales se determinó el coeficiente de fricción. Se discuten los resultados de los recubrimientos NQ-PTFE obtenidos en distintas condiciones del baño químico y se comparan con los obtenidos para recubrimientos simples de NQ.Electroless nickel coating (EN is a highly functional engineered finish. A "composite" coating (EN-PTFE of electroless nickel and PTFE (Teflon is formed when PTFE micro-particles are uniformly dispersed throughout the coating. The resulting coating combines the corrosion resistance and hardness of EN with the excellent release properties and lubricity of PTFE. In this work we present the results of the tribological characterization of different coatings with a PTFE content of about 20 % and a structure Substrate EN-PTFE deposited on steel. The tribological characterization was conducted in a ball-on-disk tribometer using an alumina ball from which the friction coefficients were determined. The results for different ENPTFE coatings are discussed and compared to those obtained for simple EN coatings.

  3. Antioxidant isoenzyme responses to nickel-induced stress in tobacco cell suspension culture Resposta de isoenzimas antioxidantes ao estresse induzido por níquel em cultura de células em suspensão de fumo

    Directory of Open Access Journals (Sweden)

    Georgia Bertoni Pompeu

    2008-01-01

    Full Text Available Exposure to nickel (Ni at high concentrations can lead to production of reactive oxygen species (ROS resulting in oxidative damage at the cellular level. We investigated the antioxidative responses of Nicotiana tabacum cv BY-2 cell suspension to Ni stress (0.075 and 0.75 mM NiCl2 over a 72 h period with special attention to potential alterations in isoenzymes of superoxide dismutase (SOD, catalase (CAT and glutathione reductase (GR. Two main SOD isoenzymes were observed, a Mn-SOD (band I and a Fe-SOD (band II, as well as one CAT isoenzyme and four GR isoenzymes. Activity staining analysis revealed that CAT activity plays a major role in the early response to Ni-induced oxidative stress, particularly when the Ni concentration used was low, whilst a specific GR isoenzyme appears to respond to the Ni-induced oxidative stress when a much higher Ni concentration was used to induce the stress for the same period of treatment. These results illustrate the importance and advantages of determining individual isoenzyme activities.A exposição ao níquel (Ni, em altas concentrações, pode levar à produção de espécies reativas de oxigênio (EAOs, resultando em danos oxidativos em nível celular. Foram investigadas as respostas antioxidativas de células em suspensão do cultivar BY-2 de Nicotiana tabacum submetidas ao estresse por Ni (0.075 e 0.75 mM de NiCl2 por 72 h, com atenção especial às alterações potencias em isoenzimas de superóxido dismutase (SOD, catalase (CAT e glutatione redutase (GR. Duas principais isoenzimas de SOD foram observadas, uma Mn-SOD (banda I e outra Fe-SOD (banda II, bem como uma isoenzima CAT e quatro isoenzimas de GR. As análises revelaram que a atividade de CAT tem papel principal no momento inicial de resposta ao estresse oxidativo induzido por Ni, particularmente, quando sua concentração foi mais baixa, enquanto uma isoenzima específica de GR parece responder a este estresse na concentração mais alta de Ni

  4. Distribuição espacial de cobre, zinco e níquel em um Latossolo após quinze anos da aplicação de lodo de esgoto

    Directory of Open Access Journals (Sweden)

    Carlos Antonio Centurion Maciel

    2012-01-01

    Full Text Available A utilização agrícola do lodo de esgoto como fonte de nutrientes para as plantas é uma das alternativas mais viáveis de reciclar este material sem comprometer a qualidade do meio ambiente. Este trabalho foi realizado visando quantificar e mapear os teores de cobre, zinco e níquel em um solo após quinze anos da aplicação de lodo de esgoto (LE. De 1983 a 1987, a área experimental foi utilizada em um ensaio com doses de 0, 20, 40, 60 e 80 Mg ha-1 de lodo de esgoto e de nitrogênio (0, 50, 100 e 150 kg ha-1 em cultivo de milho. Com o término deste experimento, o solo permaneceu sob pousio com gramínea (Brachiaria decumbens Stapf e, em 2002, foram coletadas novas amostras de terra, nas camadas de 0-20 cm e de 20-40 cm de profundidade e da parte aérea das plantas de maneira georreferenciada. As amostragens foram realizadas a cada 3 m sobre três transeções distantes 15 m uma da outra e locadas em ângulo de 45º em relação aos limites da área experimental, totalizando 50 pontos amostrais. Os dados foram analisados inicialmente em função dos momentos estatísticos descritivos e a variabilidade espacial dos atributos do solo e da planta foi determinada por análise geoestatística utilizando semivariogramas que permitiram também a obtenção de mapas interpolados por krigagem desses parâmetros. Os atributos do solo pH, MOS e CTC não estão correlacionados com os teores de Cu, Zn e Ni no solo e nas plantas. Tanto o DTPA quanto o Mehlich-3 foram eficientes na predição da disponibilidade de Zn no solo e na planta. Após 15 anos da aplicação de biossólido, os teores de Cu, Zn e Ni na camada de 0 - 20 cm de profundidade e determinados tanto com DTPA quanto Mehlich-3, estavam com estrutura de dependência espacial classificada como forte e/ou moderada. O grau de dependência espacial dos teores de Cu, Zn e Ni, nas plantas, foi diferente do verificado para esses elementos no solo.

  5. Aplicación de un puente LCR en la caracterización de superficies de níquel tratadas voltamperométricamente en medio ácido en ausencia y presencia de ion cloruro

    Directory of Open Access Journals (Sweden)

    Gregori, J.

    2003-10-01

    Full Text Available Impedance spectra for nickel electrodes at his corrosion potential after voltammetric treatment in acid media has been obtained. A LCR bridge has been used, controlling the applied potential by means of a potentiostat. The passive layer, generated after successive potential scans, has been characterized by means of the interfacial double layer capacitance and the faradaic impedance. The generalized corrosion, and also the localized attack, have been observed by means of scanning electron microscopy (SEM, whilst the scanning tunnelling microscopy (STM has been used in order to realize the morphological analysis of the surfaces. In this way we want to correlate the morphological changes in the electrode surface after the successive scans in the acid media in absence and in presence of chloride with the impedance electrochemical response of the interface. When chloride is present in the acid media the charge transport across the interface is less impeded. The localized corrosion damages the passive layer electrogenerated after successive scans.

    Se obtuvieron espectros de impedancias de electrodos de níquel a su potencial de corrosión, tras su tratamiento voltamperométrico en medio ácido. Para ello, se utilizó un puente LCR controlando el potencial aplicado mediante un potenciostato. La capa de pasivado, generada tras ciclados sucesivos de potencial, se caracterizó a través de los valores de la capacidad interfacial de doble capa y de los de impedancia faradaica. La corrosión generalizada y también la localizada se observaron mediante microscopía electrónica de barrido (SEM, mientras que se utilizó la microscopía de efecto túnel (STM para realizar el análisis morfológico de las superficies. De este modo, se pretende correlacionar los cambios morfológicos producidos en la superficie electródica tras ciclados sucesivos en medio ácido en presencia y ausencia de iones cloruro, con la respuesta electroquímica de impedancias de

  6. La notion de « spectacle » dans le cinéma de Fellini : enjeux esthétiques d’une cinématographie anti-fictionnelle

    Directory of Open Access Journals (Sweden)

    Alessandro Leiduan

    2012-07-01

    allontanano dalla doxa estetica dominante? Ci è sembrato di poter riconoscere questa categoria descrittiva nella nozione di spettacolo. Per spettacolo intendiamo quel tipo preciso di divertimento popolare a cui Fellini ha dato ampio spazio nei propri film : dei numeri da cabaret, music-hall o circo, interpretati da illusionisti, clown, cantanti o altri artisti minori specializzati nell’intrattenimento di un pubblico popolare. Lo studio delle caratteristiche di questi spettacoli e il loro confronto con le caratteristiche formali del cinema felliniano più sperimentale, ci ha permesso di riconoscere l’esistenza di diversi punti in comune tra i due fenomeni convincendoci dell’opportunità di accordare al concetto di spettacolo un ruolo determinante nella genesi del cinema della maturità di Fellini. esthétique, spectacle, cinéma, Fellini

  7. Développement de l’expertise des usagers via les TIC : quels enjeux pour les travailleurs des relations de services ? Development of users’ expertise through information technologies : What is at stake for agents in service relationships ? Desarrollo de la pericia de los usuarios por medio de las tecnologías de la información y comunicación : qué es lo que está en juego para los trabajadores implicados en las relaciones de servicio ?

    Directory of Open Access Journals (Sweden)

    Marc-Éric Bobillier Chaumon

    2007-04-01

    Full Text Available Les services immatériels et relationnels occupent une part de plus en plus importante dans l’économie et le développement de la croissance. L’objectif principal de cet article est d’analyser les effets des technologies d’information (E.services : E.banking ou E.administration dédiées aux usagers dans les relations de services ultérieures en face à face avec les agents. Deux études ont été réalisées : dans le secteur privé (banques et dans le secteur public (mairie.Dans les faits, les expertises acquises par les usagers produisent de nombreux effets sur l’activité des professionnels : développement de compétences, autonomie, implication, mais aussi un ensemble d’engagements pour réguler les différentes modalités d’intensification de la charge de travail (apprentissage, comportements d’adaptation ainsi que leur impact sur la santé (stress.Immaterial and relational services occupy an increasingly important place in the economy and growth dynamics. The main objective of this paper is to analyze the effects of information technologies (E-services : E-banking or E-administration dedicated to users in subsequent « face to face » service relationships with agents. Two studies were carried out : in the private sector (banks and in the public sector (city council.In fact, the users’ acquired expertise has many impacts on professional activity : competency development, autonomy, implication, but also some commitments for regulating modes of workload intensification (training, coping behaviours as well as their impact on health (stress.Los servicios inmateriales y que implican relacionarse con el cliente, ocupan una parte cada vez más importante en la economía y en el desarrollo del crecimiento económico. El principal objetivo de este artículo es analizar los efectos de las tecnologías de la información (Servicios electrónicos : bancarios o de administración desarrollados para usuarios en las relaciones de servicio ulteriores realizadas en un « frente a frente » con los agentes. Dos estudios fueron realizados : en el sector privado (bancos y en sector público (alcaldía. Los hechos muestran que las pericias adquiridas por los usuarios producen numerosos efectos sobre la actividad de los profesionales : desarrollo de competencias, autonomía e implicación. Pero también un conjunto de compromisos para regular las diferentes modalidades de intensificación de la carga de trabajo (aprendizaje, comportamientos de adaptación así como su impacto sobre la salud (estrés.

  8. Corruption, croissance et capital humain : quels rapports ?

    African Journals Online (AJOL)

    15 oct. 2013 ... secteur public et la définit comme l'abus d'une fonction publique à des .... particulièrement ce dernier et un indice composite à partir des trois qu'il ..... suivant une loi normale de moyenne nulle et de variance constante et finie.

  9. Quel commerce du bois dans le monde?

    Science.gov (United States)

    Joseph Buongiorno

    2014-01-01

    In today’s global economy, French forest product manufacturers are in direct competition with manufacturers of other countries. Which countries are dominant in international trade in forest products? What are the implications of global price changes on French trade in forest products? This chapter describes the place of France in global markets and how the country’s...

  10. Optimisation multi-objectif des systemes energetiques

    Science.gov (United States)

    Dipama, Jean

    The increasing demand of energy and the environmental concerns related to greenhouse gas emissions lead to more and more private or public utilities to turn to nuclear energy as an alternative for the future. Nuclear power plants are then called to experience large expansion in the coming years. Improved technologies will then be put in place to support the development of these plants. This thesis considers the optimization of the thermodynamic cycle of the secondary loop of Gentilly-2 nuclear power plant in terms of output power and thermal efficiency. In this thesis, investigations are carried out to determine the optimal operating conditions of steam power cycles by the judicious use of the combination of steam extraction at the different stages of the turbines. Whether it is the case of superheating or regeneration, we are confronted in all cases to an optimization problem involving two conflicting objectives, as increasing the efficiency imply the decrease of mechanical work and vice versa. Solving this kind of problem does not lead to unique solution, but to a set of solutions that are tradeoffs between the conflicting objectives. To search all of these solutions, called Pareto optimal solutions, the use of an appropriate optimization algorithm is required. Before starting the optimization of the secondary loop, we developed a thermodynamic model of the secondary loop which includes models for the main thermal components (e.g., turbine, moisture separator-superheater, condenser, feedwater heater and deaerator). This model is used to calculate the thermodynamic state of the steam and water at the different points of the installation. The thermodynamic model has been developed with Matlab and validated by comparing its predictions with the operating data provided by the engineers of the power plant. The optimizer developed in VBA (Visual Basic for Applications) uses an optimization algorithm based on the principle of genetic algorithms, a stochastic optimization method which is very robust and widely used to solve problems usually difficult to handle by traditional methods. Genetic algorithms (GAs) have been used in previous research and proved to be efficient in optimizing heat exchangers networks (HEN) (Dipama et al., 2008). So, HEN have been synthesized to recover the maximum heat in an industrial process. The optimization problem formulated in the context of this work consists of a single objective, namely the maximization of energy recovery. The optimization algorithm developed in this thesis extends the ability of GAs by taking into account several objectives simultaneously. This algorithm provides an innovation in the method of finding optimal solutions, by using a technique which consist of partitioning the solutions space in the form of parallel grids called "watching corridors". These corridors permit to specify areas (the observation corridors) in which the most promising feasible solutions are found and used to guide the search towards optimal solutions. A measure of the progress of the search is incorporated into the optimization algorithm to make it self-adaptive through the use of appropriate genetic operators at each stage of optimization process. The proposed method allows a fast convergence and ensure a diversity of solutions. Moreover, this method gives the algorithm the ability to overcome difficulties associated with optimizing problems with complex Pareto front landscapes (e.g., discontinuity, disjunction, etc.). The multi-objective optimization algorithm has been first validated using numerical test problems found in the literature as well as energy systems optimization problems. Finally, the proposed optimization algorithm has been applied for the optimization of the secondary loop of Gentilly-2 nuclear power plant, and a set of solutions have been found which permit to make the power plant operate in optimal conditions. (Abstract shortened by UMI.)

  11. Energy statistics. France; Statistiques energetiques. France

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-10-01

    This document summarizes in a series of tables the energy statistical data for France: consumption since 1973; energy supplies (production, imports, exports, stocks) and uses (refining, power production, internal uses, sectoral consumption) for coal, petroleum, gas, electricity, and renewable energy sources; national production and consumption of primary energy; final consumption per sector and per energy source; general indicators (energy bill, US$ change rate, prices, energy independence, internal gross product); projections. Details (resources, uses, prices, imports, internal consumption) are given separately for petroleum, natural gas, electric power and solid mineral fuels. (J.S.)

  12. Energy accounting. Comptabilite de la gestion energetique

    Energy Technology Data Exchange (ETDEWEB)

    1989-01-01

    This manual is intended to assist Canadian firms and organizations in the industrial, commercial and institutional sectors to design and implement an appropriate energy accounting system capable of monitoring energy productivity and performance. The manual provides a standard account format applicable to both single- and multi-unit organizations, and is presented through the use of text, forms, and numerical examples. It includes the basic concepts and relevant approaches, reporting considerations, the measurement of production outputs and energy inputs, and the measurement of energy productivity. Appendices provide a glossary of terms, calorific contents of energy commodities, metric conversion factors and prefixes, and a set of blank forms. 2 figs., 3 tabs.

  13. Energy statistics France; Statistiques energetiques France

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-04-01

    This document presents statistical data on energy accounting in France compared to other european countries. Many tables and charts on energy consumption, energy invoice and prices are provided by sectors. (A.L.B.)

  14. Le developpement olympique du kayak Africain : Anglophonie vs ...

    African Journals Online (AJOL)

    Si le kayak de slalom s'est développé récemment en Afrique (premier Championnat continental organisé en 2009), il a été médiatisé à la faveur de sa reconnaissance olympique. Mais quels sont les enjeux culturels du développement olympique du kayak en Afrique francophone ? Comment cette activité a-t-elle pu ...

  15. "The Electric City": Sherbrooke et son paysage hydroelectrique (1880--1930)

    Science.gov (United States)

    Guillemette, Remi

    Ce memoire presente l'imbrication des elements hydroelectrique au sein du paysage de la ville de Sherbrooke entre 1880 et 1930. Nous cherchons a comprendre comment les nouveaux elements energetiques s'integrent a celui-ci et comment la population sherbrookoise se represente ces espaces transformes. Comment le paysage hydroelectrique, en tant qu'espace vu et vecu, interagit-il avec la societe sherbrookoise ? A l'interieur de cette problematique generale, nous chercherons a repondre a trois sous-questions. Quelles sont les transformations physiques et materielles engendrees par l'implantation de cette nouvelle technologie hydroelectrique sur le paysage urbain sherbrookois ? Qu'est-ce que les differents groupes valorisent au sein du paysage ? Quel sens prennent ces nouveaux paysages pour les Sherbrookois ? En effet, l'etude du developpement rapide du potentiel hydroelectrique de la riviere Magog nous amene a demontrer que l'exploitation des ressources energetiques a profondement transforme le paysage de Sherbrooke : vastes modifications du trace des cours d'eau, apparition de batiments specifiques a la production energetique, structures de distributions et infrastructures permettant l'illumination de la ville. Nous avancons aussi que differents groupes d'individus ne valorisent pas les memes elements paysagers. Finalement, nous proposons que le regard porte par les citoyens sur le paysage energetique est tributaire de l'usage qu'ils en font. Comme la fonction des elements energetiques paysagers evolue, le regard qu' ils portent vers ces structures se transforme lui aussi. Mots cles: histoire de Sherbrooke, paysage, hydroelectricite, electricite, transformation de l'espace, histoire environnementale

  16. Individualización cinética de reacciones simultáneas por espectrometría de masa: descomposición térmica de los carbonatos básicos de níquel y de cobalto

    Directory of Open Access Journals (Sweden)

    Antonio Jerez-Mendez

    2001-03-01

    Full Text Available El análisis térmico por espectrometría de masa resuelve problemas experimentales que presenta el análisis térmico convencional al aire, en el cual es imposible detectar las reacciones que tienen lugar simultáneamente en un mismo intervalo de temperatura y, por lo tanto, resulta imposible individualizarlas a partir de la pérdida de masa por análisis termogravimétrico (AT o por el efecto (endotérmico o exotérmico, según el caso registrado por análisis térmico diferencial (ATD debido al solapamiento de los procesos en dichas curvas. El análisis térmico mediante espectrometría de masa permitió individualizar la cinética de la descomposición térmica de los carbonatos básicos de níquel y de cobalto. Estos resultados se comparan con los obtenidos en la descomposición térmica del carbonato de calcio, donde existe la evolución de un único producto gaseoso. Los resultados demuestran que en la descomposición térmica de los carbonatos básicos de níquel y de cobalto, la salida del agua de constitución y del dióxido de carbono no son procesos sucesivos. Parte del agua de constitución abandona la muestra simultáneamente con el dióxido de carbono, aunque en los termogramas estas transformaciones sólo se visualizan como efectos que se solapan

  17. Discriminación de reacciones simultáneas por espectrometría de masa en la descomposición térmica de carbonatos básicos de níquel y de cobalto

    Directory of Open Access Journals (Sweden)

    Julio C. Llópiz-Yurell

    2010-03-01

    Full Text Available Se determinaron, por espectrometría de masa y termogravimetría convencional, los parámetros y modelos cinéticos de los procesos de salida de agua y dióxido de carbono en la descomposición térmica de carbonatos básicos de níquel y de cobalto. Se demostró la ventaja de la espectrometría de masa para individualizar la cinética de procesos complejos de descomposición térmica, cuando las reacciones ocurren simultáneamente y de forma competitiva en un intervalo de temperatura. Se estudió además la cinética de la descomposición térmica del carbonato de calcio por ambas técnicas para comparar los resultados. Se observó la semejanza entre los resultados de las dos técnicas, en cuanto a modelo y parámetros cinéticos, cuando ocurre un proceso único durante la trasformación de la muestra, como en el carbonato de calcio, mientras que para los carbonatos básicos de níquel y de cobalto en la salida de agua y dióxido de carbono, que son reacciones simultáneas en el mismo intervalo de temperatura y además son competitivas, los valores de los parámetros cinéticos difieren notablemente de los obtenidos por el análisis termogravimétrico, que no puede discriminar la cinética de ambos procesos, aunque el modelo cinético resultó el mismo por ambas técnicas.

  18. Análise térmica e caracterização elétrica de materiais cerâmicos com comportamento termistor à base de óxidos de manganês, de níquel e de cobalto Thermal analysis and electrical characterization of ceramic thermistors based on manganese, nickel and cobalt oxides

    Directory of Open Access Journals (Sweden)

    J. M. Ferreira Jr.

    2007-12-01

    Full Text Available Materiais cerâmicos à base de óxidos de manganês, de níquel e de cobalto foram preparados por meio de mistura de óxidos seguida de homogeneização e sinterização a 1250 ºC. Os compostos foram caracterizados por meio das técnicas de difração de raios X e microscopia eletrônica de varredura. Análise termogravimétrica foi feita sob atmosferas oxidante e redutora. O comportamento termistor foi estudado por meio de medidas de resistividade elétrica pela técnica dc de duas pontas de prova entre temperatura ambiente e 220 °C. Os principais resultados mostram a preparação de termistores em ampla faixa de resposta elétrica por meio da variação da composição relativa dos óxidos de manganês, de níquel e de cobalto.Ceramic thermistors based on manganese, nickel and cobalt oxides were prepared by mixing these oxides followed by pressing and sintering at 1250 °C. The oxides were characterized by X-ray diffraction and scanning electron microscopy. The thermistor behavior was studied by two-probe dc electrical resistivity measurements in the room temperature-220 °C range. The main results show the possibility of preparing thermistors in a wide range of electrical response by suitable choice of the relative concentrations of the precursor oxides.

  19. Capitalisme raisonnable et développement durable : quels apports possibles à partir de l’institutionnalisme de John  ‎‏R. Commons ? Reasonable Capitalism and Sustainable Development: Potential Contributions from John R. Commons’ Institutionalism

    Directory of Open Access Journals (Sweden)

    Muriel Maillefert

    2010-12-01

    Full Text Available La problématique du développement durable interpelle directement le fonctionnement du capitalisme depuis une bonne dizaine d’années, en appelant à des changements dont l’ampleur varie en fonction des acceptions de la durabilité retenues. L’article tente de préciser les apports possibles de l’institutionnalisme de J.R. Commons à l’analyse d’une « action collective environnementale » représentative d’une volonté de structurer les conflits au sein d’un capitalisme durable. Après avoir rappelé les principales questions qui se posent au sujet de la compatibilité du capitalisme à la problématique du développement durable, nous analysons la pertinence des concepts avancés par J.R. Commons pour l’émergence d’un capitalisme durable. Pour cela, nous soulignons plus particulièrement la fécondité des principes du capitalisme raisonnable tels que définis par cet auteur, et leur proximité potentielle avec le développement durable. En se démarquant sensiblement de la posture de l’économie politique classique, l’institutionnalisme de Commons introduit en effet une opportunité intéressante pour la compréhension des enjeux de la durabilité. Puis nous nous interrogeons sur les difficultés d’une transposition de ces principes aux enjeux actuels de la définition d’un capitalisme durable, en insistant sur les limites d’une application des concepts de « valeur raisonnable » et de « transactions » aux démarches d’intégration des contraintes environnementales dans les comportements économiques du capitalisme contemporain.For over a decade, the concept of sustainable development questions the very functioning of capitalism by calling for changes of various magnitude depending on the underlying meaning given to this concept. This paper aims at specifying the potential contributions of John R. Commons’ institutionalism to the analysis of « environmental collective action ». The latter

  20. Remoção de níquel(II de soluções aquosas pela biomassa Sargassum filipendula em múltiplos ciclos de sorção-dessorção = Removal of nickel (II from aqueous solutions by Sargassum filipendula biomass in multiple cycles of sorption-desorption

    Directory of Open Access Journals (Sweden)

    Araceli Aparecida Seolatto

    2009-01-01

    Full Text Available Foi estudado o desempenho da alga marinha Sargassum filipendula na remoção de níquel de uma solução de concentração de 50 mg L-1 em pH 3,5, em colunas de leito fixo que operam em ciclos de adsorção/dessorção. Foram testados dois sistemas de eluição; oprimeiro operou com a passagem direta e o segundo com a recirculação do eluente. Em seguida, foram realizados dez ciclos consecutivos de sorção-dessorção em duas colunas de leito fixo, uma regenerada com o eluente H2SO4 (0,1 M e outra com MgSO4/H2SO4 (pH 3, em sistema de recirculação do eluente. As etapas de sorção e dessorção foram realizadas em 30 e 2h, respectivamente, representando 20 dias de uso contínuo da biomassa. Foi observada alta quantidade recuperada de níquel nas etapas de eluição (aproximadamente 95%. Ao finaldo décimo ciclo, verificou-se que a alga Sargassum filipendula continuava apresentando valores elevados da capacidade de remoção de níquel da solução, mostrando-se como alternativa eficiente de tratamento de águas residuárias contendo metais. A regeneração dabiomassa apresentou baixo custo, além de ter facilitado o processo de tratamento que dispensou trocas sucessivas da biomassa.The behavior of seaweed Sargassum filipendula during a removal of nickel from a 50 mg L-1 aqueous solution at pH 3.5 in fixed-bed columns operating in adsorption/desorption cycles was studied. Twoelution systems were tested: the first one operating with the direct passage of eluant, and the second one with the solution recycle. Then, ten consecutive sorption-desorption cycles were investigated in two packed-bed columns; the first column was regenerated with H2SO4 (0.1 M, and the second one with MgSO4/H2SO4 (3.5% in pH 3 in an eluant recycle system. The sorption and desorption stages were carried out for about 30 and 2h, respectively, representing 20 days of continuous use of the biomass. A high quantity of recovered nickelwas observed in the elution stages

  1. Biossorção de níquel e cromo de um efluente de galvanoplastia utilizando alga marinha pré-tratada em coluna = Biosorption of nickel and chromium from a galvanization effluent using seaweed pre-treated on a fixed-bed column

    Directory of Open Access Journals (Sweden)

    Márcia Teresinha Veit

    2009-04-01

    Full Text Available Este trabalho teve por objetivo o estudo da biossorção dos íons cromo e níquel presentes no efluente do processo de uma indústria de galvanoplastia, utilizando como biossorvente a biomassa de alga marinha pré-tratada Sargassum filipendula. As condições deoperação da coluna foram: massa de biossorvente de 8 g, pH do efluente de alimentação 3,85, temperatura de 30ºC, vazão de 6 mL min.-1 e concentrações iniciais de alimentação (cromo+níquel de 7,12 e 3,66 meq L-1. Foi empregado um modelo matemático para representar a dinâmica da biossorção em coluna de leito fixo. O modelo da isotermamulticomponente de Langmuir (qm= 2,78 meq g-1, bCr = 0,85 L meq-1, bNi = 0,08 L meq-1 foi utilizado para representar os dados de equilíbrio da coluna e para simular a dinâmica de biossorção dos íons. Os resultados da simulação demonstraram que o modelo matemáticoempregado foi capaz de descrever satisfatoriamente a complexa dinâmica de biossorção dos íons presentes no efluente.This work investigated the biosorption of chromium (III and nickel (II present in the effluent of a galvanoplasty plant using the pre-treated biomass of Sargassum filipendula seaweed. The column operation conditions were 8 g of biosorbent mass, 3.85 pH for the feed effluent, 30ºC temperature, 6 mL min.-1 flow rate, 7.12 meq L-1 initial chromium concentration and 3.66 meq L-1 initialnickel concentration. A mathematical model was used to represent the dynamics of biosorption of the metals in a fixed-bed column. The Langmuir multicomponent isotherm model (qm = 2.78 meq g-1, bCr = 0.85 L meq-1, bNi = 0.08 L meq-1 was used to represent the equilibrium data of the column and to simulate the biosorption dynamics of the ions. The simulation results showed that the mathematical model described satisfactory the complex binary biosorption of chromium and nickel in the effluent.

  2. Alergia al néquel manifestada como edema pulmonar no cardiogénico en paciente pos-cierre de comunicación interauricular con dispositivo tipo Amplatzer Nickel allergy manifested as noncardiogenic pulmonary edema in a patient post-closure of atrial septal defect with Amplatzer device

    Directory of Open Access Journals (Sweden)

    Luis A Gutiérrez

    2012-10-01

    Full Text Available El cierre percutáneo es la modalidad predilecta para el tratamiento de los defectos septales tipo ostium secundum cuando la anatomía es favorable, y reporta una tasa de éxito excelente así como también un bajo porcentaje de complicaciones. Se presenta el caso de un cierre exitoso de defecto septal tipo ostium secundum con dispositivo tipo Amplatzer en un paciente con antecedente de alergia a metales no detectada previamente, quien presentó edema pulmonar no cardiogénico, fiebre y pericarditis secundarios al níquel del dispositivo, pero tuvo mejoría y evolución satisfactoria con tratamiento médico.The percutaneous closure of ostium secundum septal defects is the preferred treatment modality when the anatomy is appropriate, as it shows high success and low complication rates. We present a case of a succesful percutaneous closure of an ostium secundum septal defect with an Amplatzer septal occluder device in a patient with an undetected metal allergy which led her to non cardiogenic pulmonary edema, fever and pericarditis related to the nickel contained in the device, with improvement and satisfactory evolution after medical treatment.

  3. Requerimientos tecnológicos del transportador de laterita hacia el molino de bolas, de la Empresa Productora de Níquel Comandante Ernesto Guevara; Technological Requirements of the Conveyor Belt which Carries Laterite to the Balls Mill in Nickel Producer

    Directory of Open Access Journals (Sweden)

    Javier Muñoz Álvarez

    2011-02-01

    Full Text Available Se describe el flujo productivo existente en la Empresa Productora del Níquel Comandante Ernesto Guevara,hasta la etapa de la molienda seca, con énfasis en los detalles técnicos de mayor relevancia en el proceso.Se analiza la influencia de la cantidad de mineral en el sistema sobre el comportamiento energético de lamolienda. Finalmente se determinan los requerimientos tecnológicos impuestos por el transportador delaterita 215 - TR - 201 al accionamiento eléctrico, en función de las características y las necesidades delproceso. In the paper, the productive flow existing in the nickel producer enterprise Commandant Ernesto Guevarawas described until the stage of dry milling, with an emphasis on the technical details of greater relevancy inthe process. There was analyzed the influence of the amount of mineral in the system over the energyconsumption performance of the milling. Finally it were identified the technological requirements imposed bythe 215 - TR - 201 laterite carrier to the electric drive, according to the characteristics and needs of theprocess.

  4. Enjeux de la médiatisation du travail coopératif distribué dans les équipes de projets de conception Stakes of Computer Supported Cooperative Work in Design Project Teams Desafíos que presenta la mediatización del trabajo cooperativo distribuido en los equipos de proyectos de diseño

    Directory of Open Access Journals (Sweden)

    Jacqueline Vacherand-Revel

    2007-10-01

    Full Text Available Les mutations organisationnelles que connaissent de nombreuses entreprises globalisées encouragent le développement de nouvelles pratiques collectives de travail pour s’affranchir de l’espace et du temps et mettre en synergie des compétences dispersées géographiquement. L’objet de cet article est d’examiner les spécificités du travail coopératif distribué au sein d’équipes qui réalisent des projets de conception d’envergure. Une forte coopération entre les coéquipiers et la gestion de multiples activités coopératives distribuées nécessitent une utilisation massive des technologies de l’information et de la communication pour interagir régulièrement et travailler ensemble dans des espaces virtuels partagés. Avec de telles conditions de travail, les enjeux sont nombreux et les risques pour la santé des coéquipiers ne doivent pas être négligés. Dans cette perspective, nous examinons les risques liés à la fragmentation du travail, à sa dispersion et les différentes tensions et surcharges qui pèsent sur le travailleur intellectuel et peuvent présenter des effets délétères sur la santé.The organizational changes that many global companies are undergoing are fostering the development of new collective work practices freeing workers from the constraints of space and time and marshalling geographically dispersed skills. The object of this article is to examine the specificities of distributed cooperative work within teams that carry out large-scale design projects. Close cooperation between the team members and the management of multiple distributed cooperative activities require a massive use of information and communication technologies so that they can interact regularly and work together in shared virtual spaces. With such working conditions, there are many issues, and the health risks must not be overlooked. From this perspective, we examine the risks of fragmented work, its dispersion, and various

  5. Enjeux et fractures de la Bolivie en 2009

    Directory of Open Access Journals (Sweden)

    Sébastien Hardy

    2009-03-01

    Full Text Available La troisième consultation référendaire organisée légalement sous le mandat du Président Evo Morales (2006-2010 a eu lieu le 25 janvier 2009. L’enjeu de cette consultation portait sur l’approbation du texte d’une nouvelle Constitution pour la Bolivie, ainsi que sur la limitation de la superficie de la propriété foncière. Les résultats pris globalement laissent penser que les propositions du Président satisfont les Boliviens. Pourtant, en changeant l’échelle d’interprétation des résultats, on retrouve les classiques dissensions qui polarisent depuis longtemps, et toujours plus, le pays.The third legally organized referendum under the mandate of President Evo Morales (2006-2010 took place on January 25, 2009. What is at stake in this consultation is the approval of the text of a new Constitution for Bolivia, and the limitation of the area of the land ownership. The results taken as a whole lead one to believe that the proposals of the President satisfy Bolivians. However, by looking at the bigger picture, one finds the traditional dissensions which have polarized the country for a long time, and continue to do so.La tercera consulta por referéndum organizada legalmente bajo el mandato del Presidente Evo Morales (2006-2010 tuvo lugar el 25 de enero de 2009. El desafío de esta consulta se refería a la aprobación del texto de una nueva Constitución para Bolivia, y a la limitación de la superficie de la propiedad de la tierra. Globalmente, los resultados dejan pensar que las propuestas del Presidente satisfacen a los Bolivianos. Sin embargo, al cambiar la escala de interpretación de los resultados, se encuentran las clásicas disensiones que polarizan desde hace tiempo, y siempre más, el país.

  6. La methode Angot : autofiction, critique realiste, et enjeux esthetiques

    African Journals Online (AJOL)

    , en abordant sept de ses romans, (Léonore, toujours, 1993 ; L'Inceste, 1999 ; Les Désaxés, 2004 ; Le Marché des amants, 2008 ; Les Petits, 2011 ; La Petite foule, 2014 et Un Amour impossible, 2015) qui se revendiquent de l'autofiction sans ...

  7. Black Sea challenges; Les enjeux de la Mer Noire

    Energy Technology Data Exchange (ETDEWEB)

    Drevet, J F [Commission Europeenne, DG III, Bruxelles (Belgium)

    2008-03-15

    In this month's European column, Jean-Francois Drevet examines the issues that arise for Europe from the Black Sea region. The Black Sea is increasingly becoming a crucial place of transit for hydrocarbon imports from the Caspian and Russia into the European Union. The considerable increase in this traffic raises both environmental problems (the risk of oil slicks) and issues of security of supply, on account of the economic and political fragility of some of the bordering or neighbouring states (Ukraine, Georgia, Armenia, Azerbaijan, Russia/Chechnya etc.). This is why, as Jean-Francois Drevet stresses, the European Union has been trying since the mid-1990's to claim a role in the management of the affairs of the region. With two bordering states (Rumania and Bulgaria) joining the EU in 2007, cooperation in the Black Sea has become a priority within the framework of the European Neighbourhood Policy, and this column delineates a number of the obstacles that still have to be surmounted. (author)

  8. Mondialisation et enjeux géo-culturels

    Directory of Open Access Journals (Sweden)

    Paul Claval

    2007-06-01

    Full Text Available La culture est l’ensemble de ce qui n’est pas inné en nous : elle est faite de ce qu’on nous a appris et de ce que notre expérience nous apporte. Elle nous relie au passé, elle nous donne les moyens d’agir au présent, elle nous tourne vers l’avenir. Elle est véhiculée par des signes, des représentations. Elle enveloppe le monde où nous vivons : celui-ci ne nous est jamais donné directement (Claval, 1995 : 2003.Etant transmise, la culture porte la marque des moyens de communication mis en œuv...

  9. Enjeux et enseignements | CRDI - Centre de recherches pour le ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    11 janv. 2011 ... En fait, le développement proprement dit est généralement associé à ces transitions dangereuses et prometteuses — transitions de la dictature à la démocratie, d'économies défaillantes à des marchés bien gérés, de la guerre à la paix. Malgré les risques et les renversements subits qu'elles comportent, ...

  10. L'avant-projet : définition et enjeux

    OpenAIRE

    Gautier , Frédéric; Lenfle , Sylvain

    2004-01-01

    This paper explores the strategic role of front-end activities in project performance. More precisely it focuses on what is called pre-project. Using case studies from auto aeronautics we propose a definition of this phase and we discuss the question it raises.; Depuis la fin des années 80, la place prise par les stratégies de différenciation dans les économies occidentales est à l'origine de mutations importantes de l'organisation de la conception de produits nouveaux dans les entreprises. C...

  11. Caspian sea: petroleum challenges; Mer Caspienne: enjeux petroliers

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    The Caspian sea is one of the world areas the most promising in terms of investments and petroleum development. This study presents the petroleum challenges generated by this hydrocarbons reserve. The first part discusses the juridical status (sea or lake), the petroleum and the gas reserves, the ecosystem and the today environment (fishing and caviar), the geostrategic situation and the transport of gas and oil. It provides also a chronology from 1729 to 2005, a selection of Internet sites, books and reports on the subject and identity sheets of the countries around the Caspian sea. (A.L.B.)

  12. Les enjeux écologiques de Palo Verde (Costa Rica

    Directory of Open Access Journals (Sweden)

    Bertrand LÉVY

    1992-09-01

    Full Text Available Près de Palo Verde a été créé un parc naturel. Un projet d’irrigation risque de perturber l’écologie de la région. Une carte de son écosystème a été établie par télédétection, pour évaluer l’impact d’un tel projet.

  13. Innovations en vaccinologie: enjeux et perspectives pour l’Afrique

    Science.gov (United States)

    Diop, Doudou; Sanicas, Melvin

    2017-01-01

    La vaccination est incontestablement l’une des interventions de santé publique les plus efficaces et les plus rentables qui soient. Les vaccins continuent de révolutionner notre capacité à prévenir les maladies et à améliorer la santé. Avec toutes les avancées technologiques, nous sommes en mesure d’étendre les avantages des vaccins à plus de gens et de fournir une meilleure protection contre les maladies infectieuses mortelles. Toutefois, avec le développement incessant de nouvelles souches microbiennes à travers le monde, la recherche en vaccinologie se doit d’innover continuellement. D’énormes progrès ont été réalisés pour améliorer la couverture vaccinale et introduire de nouveaux vaccins en Afrique. De nouveaux types de vaccins associés à des outils de vectorisation, d’administration et de délivrance spécifiques mais aussi des adjuvants susceptibles de moduler finement la réponse immunitaire sont attendus dans le futur. En Afrique, il est nécessaire de développer une approche régionale afin de répondre efficacement aux nombreux défis. Une meilleure information, la formation des personnels de santé en vaccinologie et des recherches bien ciblées sont les clés des futurs accomplissements dans le domaine. PMID:28690749

  14. Biofuels: stakes, perspectives and researches; Biocarburants: enjeux, perspectives et recherches

    Energy Technology Data Exchange (ETDEWEB)

    Appert, O.; Ballerin, D.; Montagne, X.

    2004-07-01

    The French institute of petroleum (IFP) is a major intervener of the biofuels sector, from the production to the end-use in engines. In this press conference, the IFP takes stock of the technological, environmental and economical stakes of today and future biofuel production processes and of their impact on transports. This document gathers 2 presentations dealing with: IFP's research strategy on biofuels (transparencies: context; today's processes: ethanol, ETBE, bio-diesel; tomorrows processes: biomass to liquid; perspectives), bio-diesel fuel: the Axens process selected by Diester Industrie company for its Sete site project of bio-diesel production unit. The researches carried out at the IFP on biofuels and biomass are summarized in an appendix: advantage and drawbacks of biofuels, the ethanol fuel industry, the bio-diesel industry, biomass to liquid fuels, French coordinated research program, statistical data of biofuel consumption in France, Spain and Germany. (J.S.)

  15. Cellules solaires photovoltaïques plastiques enjeux et perspectives

    Science.gov (United States)

    Sicot, L.; Dumarcher, V.; Raimond, P.; Rosilio, C.; Sentein, C.; Fiorini, C.

    2002-04-01

    Après avoir détaillé le fonctionnement d'une cellule photovoltaïque plastique et les paramètres photovoltaïques permettant de caractéiser son efficacité, un état de l'art des technologies de fabrication des cellules est présenté. Des moyens d'amélioration des performances des cellules photovoltaïques organiques sont ensuite illustrés par l'étude de dispositifs développés au Laboratoire Composants Organiques (LCO) du CEA Saclay.

  16. Les enjeux du modèle standard

    CERN Document Server

    CERN. Geneva

    2008-01-01

    Toute la matière visible dans l'Univers est décrite par le « Modèle Standard ». Selon cette théorie, la matière est constituée d'atomes, qui contiennent des électrons orbitant autour de noyaux, dont les composants fondamentaux sont les quarks. Quatre forces fondamentales agissent entre ces particules élémentaires : les forces électromagnétique est gravitationnelle, et les interactions nucléaires forte et faible. La description fournie par le Modèle Standard de ces particules et de leurs interactions est en parfait accord avec les expériences. Néanmoins, des questions fondamentales restent sans réponse jusqu'à maintenant : d'où vient la masse des particules ? Pourquoi y a-t-il tant de types de particules ? Existe-t-il une théorie unifiée de toutes les interactions ? Quelle est la nature de la matière cachée prédite par les astrophysiciens ? Le LHC au CERN donnera des éléments de réponse à ces questions au-delà du Modèle Standard.

  17. Quel futur pour les voitures autonomes en Suisse ?

    OpenAIRE

    Ketterer, Nicolas; Ketterer, Nicolas

    2016-01-01

    Le but de ce travail est de donner une vision d’ensemble sur le monde très complexe des VAs (par la suite appelées VA). L’arrivée des VA provoquera des changements de paradigmes susceptibles de révolutionner nos habitudes, en matière de mobilité, mais pas seulement. Vingt-trois interviews ont été menés lors de la recherche d’informations afin de réunir les connaissances les plus complètes possible. Une attention particulière a été portée à la variété des domaines d’activité des répondants, af...

  18. Quel contrôle de gestion pour les startups ?

    OpenAIRE

    Meyssonnier , François

    2015-01-01

    Une étude de huit PME fondées sur la science permet d’identifier les spécificités du contrôle de gestion des startups. Dans les startups émergentes le dirigeant n’utilise que des linéaments de contrôle de gestion essentiellement pour développer son approche cognitive du business model. Dans les startups en croissance le contrôle de gestion a un rôle de garde-fou et les outils de pilotage de la performance sont utilisés essentiellement de façon interactive et pour la prévision. Les principaux ...

  19. Les agendas 21 locaux : quels apports sous quelles latitudes ?

    Directory of Open Access Journals (Sweden)

    Cyria Emelianoff

    2005-05-01

    Full Text Available Since the Rio conference, several thousands local agendas 21 have assisted the penetration of the concept of sustainable development at the local level. This article presents a synthesis of the approaches employed by local authorities in 9 European countries, with an emphasis on the benefits and limitations presented by the local agendas 21 in place. We characterised the specificities of French local authorities and determined the geographical dimensions of the mobilisation in favour of local agendas 21.

  20. Quel avenir pour la gestion des parties prenantes?

    Directory of Open Access Journals (Sweden)

    John Boatright

    2006-05-01

    Full Text Available The concept of stakeholders is, without any doubt, one of the most important contributions to the field of business ethics in the recent years.This concept articulates a moral requirement in virtue of which managers must consider the interests of all stakeholders. In its most common form, the list of stakeholders includes the employees, the customers, the suppliers and the community, as well as shareholders and other investors. The defenders of the stakeholders management theory are right on one point: the modern lucrative business must serve the interests of all stake-holding groups. But the stakeholders management theory fails in not recognizing that managers acting in the interest of the shareholders also can, by the same token, act in the interests of all stakeholders. Indeed, insofar as the market is able to provide the benefits wished by the various stakeholders, the managers do not explicitly need to consider their interests when they make a decision. Nevertheless, partisans of the stakeholders management theory are right to prompt that each one of these groups should be able to profit from the activities of the company. They are also right to recall the responsibilities of managers in creating wealth for the benefitof all.

  1. QUEL AVENIR POUR LA FINANCE ISLAMIQUE EN TUNISIE ?

    OpenAIRE

    AJILI, WISSEM; GARA, ZEINEB BEN

    2013-01-01

    RESUME: L’article a pour objectif de déterminer les facteurs explicatifs de la réticence (ou non) des tunisiens vis-à-visde la finance islamique et d’apprécier le potentiel de développement d’un système financier islamique en Tunisie sur le moyen-long terme. Ainsi, sur la base d’une étude exploratoire menée conjointement auprès des professionnels de la finance conventionnelle et islamique et des ménages, plusieurs facteurs de réticence ont été identifiés. Néanmoins, tandis que les professionn...

  2. QUELS MÉDIAS POUR QUELLE SOCIÉTÉ?

    OpenAIRE

    Tétu , Jean-François

    1993-01-01

    National audience; "Scepticisme, stupéfiance, incrédulité. Tels sont, à l'égard des médias, et plus particulièrement dela télévision, les sentiments dominants des citoyens. Chacun, confusement, sent bien que quelquechose ne va pas dans le fonctionnement général du système informationnel. Les mensonges et lesmystifications de la guerre du Golfe -"l'Irak, quatrième armée du monde", "la marée noire dusiècle", "une ligne défensive inexpugnable", "la guerre chirurgicale", "l'efficacité des Patriot...

  3. Quels lieux de rencontre démocratiques ?

    Directory of Open Access Journals (Sweden)

    Christian Ruby

    2003-06-01

    Full Text Available C'est avec une force éclatante que l'artiste allemand contemporain Jochen Gerz a posé le problème des lieux de rencontre dans une société fracturée, de ces lieux de contact qui souhaitent contrer les effets de dispersion de la société de consommation et du spectacle, mais aussi des endroits dans lesquels la présence et le face à face rendus possibles entre des personnes travaillent le rapport à l'autre, le désir de ne pas voir et le fait que ce n'est pas tout de ...

  4. Iran: what nuclear sanctuary?; Iran: quel sanctuaire nucleaire?

    Energy Technology Data Exchange (ETDEWEB)

    Viaud, P.

    2010-05-15

    The author continues his study of Iran and its implicit nuclear strategy by showing us the three circles of sanctuary that it contains. He shows to what extent this country, with its strong and ancient geopolitical identity, has managed to restore its rank at the centre of the geostrategic and geo-economic chessboard of the region. (author)

  5. What nuclear industry after Fukushima?; Quel nucleaire apres Fukushima?

    Energy Technology Data Exchange (ETDEWEB)

    Barre, Bertrand [Institut national des sciences et techniques nucleaires, CEA-Saclay, 91191 Gif-sur-Yvette Cedex (France)

    2011-07-01

    Nuclear power experienced a fast growth during the 70's and 80's, but a quasi-stagnation during the 90's. Since the beginning of the 21. century, a so-called renaissance could be witnessed, fuelled by concerns about energy security of supply, volatility of oil and gas prices, fear of an incoming 'peak oil', and, last but not least, the threat of global climate change due to the anthropogenic emissions of greenhouse effect gases. Then, on March 11 2011, a monster earthquake followed by a violent tsunami triggered an accident which all but destroyed four nuclear reactors on the Fukushima-Daiichi site, on the east coast of Honshu, the main Japanese island. There was meltdown in three reactor cores, hydrogen explosions which blew off the upper structures of four reactor buildings, and massive radioactive contamination of a spread of land north-west of the site as well as radioactive releases to the ocean. This accident triggered reactions of various intensities throughout the world, awakening the fears, and questions raised 25 years before by the Chernobyl accident. But the tsunami did not make the fundamentals of the renaissance disappear. After a pause, to fully learn lessons from the accident, the renaissance is likely to start again, all the much since the 'third generation' nuclear plants would have survived unscathed the Fukushima earthquake and tsunami. (author)

  6. Quels Problemes Sanitaires Posent Les Violences Chez Les ...

    African Journals Online (AJOL)

    During follow-up, medical issues noted were genital infections (35.3%), pregnancy in 4 victims, of which 2 gave birth and 1 had voluntary interruption of the pregnancy. HIV seroconversion occurred in 7 rape victims and severe depression in 8 of which 2 who received psychiatsic support. Amongst the social issues noted ...

  7. Total body irradiation: what schedule(s). Les irradiations corporelles totales: quel(s) schema(s)

    Energy Technology Data Exchange (ETDEWEB)

    Cosset, J M [Institut Curie, 75 - Paris (France)

    1993-01-01

    In this article, the author explains why a whole-body irradiation is still an essential step before a bone marrow graft. He presents irradiation protocols for acute myeloid leukemia and chronic myeloid leukemia. 14 refs.

  8. Remediation of polluted sites. The risks, liabilities and costs; Rehabilitation de sites pollues. Quels risques? Quelles responsabilites? Quels couts?

    Energy Technology Data Exchange (ETDEWEB)

    Paquot, A. [Ministere de l' Ecologie et du Developpement Durable 75 - Paris (France); Darmendrail, D. [BRGM, 75 - Paris (France); Mensah, J. [Etablissement public foncier Nord Pas de Calais, 59 - Lille (France); Costil, J. [BURGEAP, 69 - Lyon (France); Carbon, S. [Gaz de France (GDF), 75 - Paris (France); Gervaise, Y. [SGS Multilab, 51 - Rouen (France); Bonin, H. [GRS Valtech, 69 - Rilleux-la-Pape (France); Delfaud, L. [Projenor, 59 - Lille (France); Croze, V. [ICF Environnement, 92 - Gennevilliers (France); Ricour, J. [ANTEA, des solutions globales, durables et rentables, 45 - Orleans (France); Langlois, P.

    2003-10-01

    This conference deals with the following topics: the mastery of the economic, regulation, juridical and contractual framework; liabilities and financing distribution between the intervenors; the diagnostic cost; the financial security in the sites acquisition and social right transfer; the efficient technologies of sites remediation; the communication near the site in remediation. (A.L.B.)

  9. The sustainable development of transports: the motors and the fuels; Le developpement durable des transports: quels moteurs, quels carburants?

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    This panorama 2005 between politicians, industrialists and scientists discussed the following topics: exploration-production activities and markets, refining and petrochemistry, the future world gas market, the petroleum supply and demand, the new petroleum and gas reserves, the today and tomorrow alternative fuels, the biofuels in the world, the hybrid vehicles future, the energy consumption in the transport sector, the road fuels in europe and the increase of diesel fuel, the de-pollution techniques of industrial vehicles. The slides of the interventions are provided. The sheets ''le point sur'' of the year 2005 are also provided. (A.L.B.)

  10. TIC et enseignement de la Chimie : au-delà des discours, quels dispositifs d’enseignement pour quels apprentissages?

    Directory of Open Access Journals (Sweden)

    MARIE-THÉRÈSE SALIBA

    2012-12-01

    Full Text Available In this research we suggest to take advantage of the opportunities offered by the new information and communication technologies (NICT. This new techno-scientific process of investigation will be realized via a laboratory of CAE (Computer assisted experimentations where the computer is the learning tool that seeks in real time concrete observations. Experimental know- how, and the using of abstract representations to solve problems. To do this, we have introduced innovated courses in Didactics based on ICT/CAE in our Masters programs in the Holy Spirit University of Kaslik (USEK. These courses are intended for initial and continuous training of our student-teachers in mathematics and science and technology. Subsequently, our student-teachers will use CAE with their students in high schools for teaching chemistry to test and validate the functional aspect of the environment CAE proposed. The educational validation of this paradigm will be based on the confrontation between a priori analysis and subsequent findings to measure the gap of understanding that students have acquired.

  11. Energy situation september 2002; Conjoncture energetique septembre 2002

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-10-01

    The monthly situation analysis in France is presented. Statistics are given for energy consumption, demand, import and export. A special attention is given to the primary energy, the solid fuels, the petroleum products, the natural gas and the electric power. (A.L.B.)

  12. Energy situation - September 2007; Conjoncture energetique - septembre 2007

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-10-15

    This report makes a status of the French energy expenses, prices, production, consumption, demand, import and export since January 2005 and up to August 2007. Details are given separately for primary energy, solid mineral fuels, petroleum products, natural gas and electric power. (J.S.)

  13. Simulation du potentiel energetique de la houle au port autonome ...

    African Journals Online (AJOL)

    , ont permis d'évaluer les potentiels de vitesses des houles et l'élévation verticale du niveau de la mer. A partir de ces deux paramètres fondamentaux et utilisant les mesures faites par le Millénium Challenge Account (MCA-Bénin) en 2011 ...

  14. Energetic situation. July 1998; Conjoncture energetique. Juillet 1998

    Energy Technology Data Exchange (ETDEWEB)

    1998-09-01

    This report presents a balance sheet of the French energy situation (domestic demand, national production, consumption, imports, exports, sales, prices, stocks..) in July 1998. Data are presented using graphics and tables and as follows: energy bill of all energy sources (evolution since January 1996), primary energy (energy dependency, consumption after climate correction, CO{sub 2} emissions), solid mineral fuels, petroleum products, natural gas and electric power. (J.S.)

  15. Overall energy situation, January 1998; Conjoncture energetique, janvier 1998

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-08-01

    This report is an economic review of the French energy data from January 1995 to January 1998: energy demand, imports, exports, prices, national consumption and production of primary energy, solid mineral fuels, petroleum products, natural gas and electric power with climate corrections. (J.S.)

  16. Energy independence versus world market; Independance energetique versus marche mondial

    Energy Technology Data Exchange (ETDEWEB)

    Noel, P

    2003-07-01

    The geo-policy is the unity of the rules and political actions coming from taking into account the problem of the national energy demands facing the world energy market. The aim of this paper is to show that these actions are confronted to two paradigms of public policy. One is the research of the energy policy, the other is the effort of building and safety of the world market. (A.L.B.)

  17. Energy situation - February 2009; Conjoncture energetique - fevrier 2009

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2009-03-15

    This report makes a status of the French energy expenses, prices, production, consumption, demand, import and export since January 2005 or 2007 and up to February 2009. Details are given separately for primary energy, solid mineral fuels, petroleum products, natural gas and electric power. (J.S.)

  18. Energy situation - February 2008; Conjoncture energetique fevrier 2008

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This report makes a status of the French energy expenses, prices, production, consumption, demand, import and export since January 2005 or January 2006 and up to January or February 2008. Details are given separately for primary energy, solid mineral fuels, petroleum products, natural gas and electric power. (J.S.)

  19. effet d'une complementation energetique en periode humide

    African Journals Online (AJOL)

    AISA

    La production de lait des chèvres conduites selon le mode extensif. (chèvres du lot .... L'accès aux mères pour la tétée a été effectué comme suit ..... adaptatifs spécifiques se mettent en marche et .... 7th International conference on goats. Paris,.

  20. France: energy prospects for 2050; France: perspectives energetiques pour 2050

    Energy Technology Data Exchange (ETDEWEB)

    Acket, C.; Bacher, P

    2005-07-01

    This study analyzes 4 simple energy policy scenarios and their impact on the abatement of carbon dioxide emissions. The first scenario considers the same consumption rates as today and assumes that no oil and gas shortage and no environmental policy pressure will lead to a significant abatement of CO{sub 2} emissions. Two other extreme scenarios, on the contrary, consider a maximum reduction of the use of fossil fuels, one with the development of nuclear energy and the other without. The last scenario is intermediate between the extreme ones and considers the development of renewable energy sources and the implementation of important energy saving. The backward analysis of these scenarios indicates that nuclear energy and the development of renewable energies is necessary to reach the CO{sub 2} abatement goals expected for 2050 and that energy saving must be a priority. (J.S.)

  1. Energy efficiency: utopia or reality?; Efficacite energetique: utopie ou realite?

    Energy Technology Data Exchange (ETDEWEB)

    Anon

    2006-04-15

    In its 2006 allocution the world council on the energy WEC, analyzes the role of the energy efficiency in the energy life cycle. In spite of different objectives followed by the developing and developed countries, implement a world energy efficiency economy is a challenge possible by the cooperation.The WEC is an ideal forum for the information and experience exchange. (A.L.B.)

  2. Energy policy of France; Politique energetique de la France

    Energy Technology Data Exchange (ETDEWEB)

    Revol, H

    2001-07-01

    In November 1997, the French senate decided the creation of an inquiry commission in order to start up a study about the future of the French energy policy. The commission has interviewed the overall actors of the energy policy: ministers, heads of energy companies, higher officials, syndicates, consumer and environment protection associations, scientists and economists. The inquiry has been extended to other countries of the European community, and also to China, Japan, the USA and Canada. Despite various economical contexts and resources, all these countries have developed energy policies which aim at ensuring an energy independence and at supplying energy at the best price for a better economic competitiveness. This report presents first the French experience and the evolution of the French energy policy during the last 50 years with respect to the economical and political constraints encountered. The second part is a reflection about the principles that will guide the French energy policy in the context of deregulation of the European energy market and of the environmental constraints imposed by the Kyoto summit. Detailed proposals for the increase of the French energy independence are presented in conclusion of the report. (J.S.)

  3. Evolution of energy structures; Evolution des structures energetiques

    Energy Technology Data Exchange (ETDEWEB)

    Nifenecker, H. [Centre National de la Recherche Scientifique (CNRS), 38 - Grenoble (France)

    2005-07-01

    Because of the big inertia and long time constants of energy systems, their long-time behaviour is mainly determined by their present day state and by the trends of their recent evolution. For this reason, it is of prime importance to foresee the evolution of the different energy production sources which may play an important role in the future. A status of the world energy consumption and production is made first using the energy statistics of the IEA. Then, using the trends observed since 1973, the consequences of a simple extrapolation of these trends is examined. Finally, the scenarios of forecasting of energy structures, like those supplied by the International institute for applied systems analysis (IIASA) are discussed. (J.S.)

  4. The France energy situation; La situation energetique de la France

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    This analysis of the french energy situation provides information and key data on some key facts about the energy in France, the France energy supply and demand, the major principles of energy policy, the challenges of french energy policy and the DGEMP (general directorate for energy and raw materials). (A.L.B.)

  5. Developing countries` energy requirements; Besoins energetiques des pays en developpement

    Energy Technology Data Exchange (ETDEWEB)

    Arques, P. [Ecole Centrale Lyonnaise, 69 - Ecully (France)

    1995-03-01

    The amount of electric power and bacteriologically clean water produced in developing countries today is insufficient for the people`s needs. In order to develop successfully, these countries must necessarily achieve a threshold which, for the whole planet, will come to 1 000 000 MW of electricity. One way this can be done is by building several hundred power plants, with all the concomitant pollution problems. Another solution is Stirling motors, which use the power of sunlight to pump and pasteurize water and to generate electricity for one or more families, or for developmental home industries. (author). 4 refs., 6 figs.

  6. The energy situation. September 2008; Conjoncture energetique. Septembre 2008

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    Statistics are given on the energy and raw materials production and consumption levels in France in September 2008. Primary energy demand has increased for the petroleum products, stayed stable for the natural gas, decreased for the coal and the electric power. A special attention is given to the primary energy, the solid fuels, the petroleum products, the natural gas and the electric power. (A.L.B.)

  7. Energy situation - March 2008; Conjoncture energetique - mars 2008

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This report makes a status of the French energy expenses, prices, production, consumption, demand, import and export since January 2006 and up to February-March 2008. Details are given separately for primary energy, solid mineral fuels, petroleum products, natural gas and electricity. (J.S.)

  8. Energy situation - April 2008; Conjoncture energetique - avril 2008

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This report makes a status of the French energy expenses, prices, production, consumption, demand, import and export since January 2006 and up to March-April 2008. Details are given separately for primary energy, solid mineral fuels, petroleum products, natural gas and electricity. (J.S.)

  9. Energy statistics France - June 2008; Statistiques energetiques France - juin 2008

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This document summarizes in a series of tables and graphics the energy statistics for France for the last decades and up to 2007: resources, uses, prices, net imports and domestic market consumption for petroleum, natural gas, electricity, and solid mineral fuels (coal, lignite, coke). 2007 statistics are presented separately for each energy source (availability, uses). The evolution of the domestic energy production and consumption and the end-use consumption per sector is also summarized for the last decades. Some primary consumption forecasts are given for 2030. (J.S.)

  10. Energy situation. November 2007; Conjoncture energetique. Novembre 2007

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-12-15

    This report makes a status of the French energy expenses, prices, production, consumption, demand, import and export since January 2005 and up to October 2007. Details are given separately for primary energy, solid mineral fuels, petroleum products, natural gas and electricity. (J.S.)

  11. Energy situation - May 2008; Conjoncture energetique - mai 2008

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This report makes a status of the French energy expenses, prices, production, consumption, demand, import and export since January 2006 and up to April-May 2008. Details are given separately for primary energy, solid mineral fuels, petroleum products, natural gas and electricity. (J.S.)

  12. Energy situation. January 2008; Conjoncture energetique. Janvier 2008

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-02-15

    This report makes a status of the French energy expenses, prices, production, consumption, demand, import and export since January 2005 and up to December 2007. Details are given separately for primary energy, solid mineral fuels, petroleum products, natural gas and electricity. (J.S.)

  13. Towards a new energy revolution?; Vers une nouvelle revolution energetique?

    Energy Technology Data Exchange (ETDEWEB)

    Rabourbin, Sabine

    2011-09-22

    At the time of the 19. century's 'energy revolution', a man was consuming about 20.000 kcal/day. Today, in industrialized countries and if we include all forms of energies (space heating, transport, production, feeding etc.) this consumption reaches up to 230.000 kcal/day. We have reached a 'power society' which has put no limit to its growth needs. However, this growth is based on an immoderate consumption of fossil fuels which are on the way of exhaustion. A new energy revolution appears as inevitable to us, but will it be similar or in opposition to the previous ones? This revolution will have to integrate a new parameter: the need to fit with a sustainable development philosophy. To determine the conditions of this revolution, it is useful to analyse the energy systems from the needs to the resources, in a historical, philosophical and technical manner. Starting from this analysis, this book explores the possibilities to build the transition towards this new energy revolution. (J.S.)

  14. Statistical data on energy. France; Statistiques energetiques. France

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-05-01

    This document summarizes in a series of tables the energy status of France for the year 2001: supplies, consumption and uses, national production, evolution per energy source and per sector of the national production and consumption since 1973, general indicators (evolution of the energy bill, prices, energy independence and gross internal product since 1973), projections. Details about the resources, uses and prices are given separately for petroleum, natural gas, electricity and solid mineral fuels and compared with the average data of the European Union. (J.S.)

  15. Energy situation. August 2000; Conjoncture energetique. Aout 2000

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-09-01

    This report makes a statement of the French energy consumption, demand, import and export since January 1998 and up to August 2000. Details are given separately for primary energy, solid mineral fuels, petroleum products, natural gas and electric power. (J.S.)

  16. Energy situation. July 2002; Conjoncture energetique juillet 2002

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-08-01

    This report makes a status of the French energy expenses, prices, production, consumption, demand, import and export since January 2000 and up to June or July 2002. Details are given separately for primary energy, solid mineral fuels, petroleum products, natural gas and electric power. (J.S.)

  17. COMPARAISON ENERGETIQUE ET EXERGETIQUE DE SYSTEMES DE DESSALEMENT

    OpenAIRE

    Byrne , Paul; Diaby , Ahmadou ,; Sarray , Yemna; Ghoubali , Redouane; Loulergue , Patrick; Balannec , Béatrice; Maré , Thierry; Sow , Ousmane

    2016-01-01

    International audience; Dans certaines zones du monde, l'eau potable n'est pas une ressource abondante et est produite par des systèmes de dessalement. Par ailleurs, les ressources en énergie doivent être rationalisées. Les performances des systèmes de dessalement sont difficiles à comparer car les technologies peuvent être très différentes et faire appel à des procédés thermiques, électriques ou mécaniques, membranaires ou non. L'exergie correspond à l'énergie mécanique potentiellement produ...

  18. Energy prospects in the USA; Les perspectives energetiques aux USA

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-03-01

    This article summarizes the main trends of the US national energy plan sustained by the administration of President Bush: national energy policy development (diversification of energy supplies, development of an hydrogen economy), energy legislation (energy saving, development of renewable energy sources, promoting national production, budget discussion), re-launching of the nuclear sector: situation of the nuclear operators, competitiveness of nuclear energy, impact of deregulation on fusion/acquisition operations, role and liability of the federal administration (development of the Yucca Mountain (Nevada) disposal site for spent fuels, 'Nuclear Power 2010' initiative, long-term 'Generation IV' program, advanced fuel cycle program, hydrogen initiative and project of very high temperature reactor (VHTR) at the Idaho national laboratory). (J.S.)

  19. Architectural design and energy performance; Conception architecturale et performance energetique

    Energy Technology Data Exchange (ETDEWEB)

    Beaud, Ph. [Agence de l' Environnement et de la Maitrise de l' Energie, (ADEME), 06 - Valbonne (France); Pouget, A. [Bureau Etude Thermique, 75 - Paris (France); Sesolis, B. [TRIBU, 75 - Paris (France)] [and others

    2000-07-01

    This day was organized around the energy performance of the architecture in three parts. A first time dealt with the design of new buildings and private houses. Simulation tools for the energy optimization and practice of design are discussed. The second part was devoted to the new 2000 regulation with an open discussion on the regulatory costs. The last part forecasted the evolution until 2015 taking into account the french program of fight against the greenhouse effect, the limitation of the air conditioning consumption and the definition of a quality label concerning the energy performances. (A.L.B.)

  20. Another possible energy landscape; Un autre paysage energetique possible

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-06-01

    This analysis presents the national energy balances from the national energy accounting. The first part presents the accounting analysis on the electric power consumption and production in France. The second part deals with the global energy accounting, for the energy sources and utilization, together. From these analysis the authors show how the global energy efficiency of production and utilization is possible. Solutions allowing the reduction of the non renewable energies consumption and solution for the nuclear power phaseout are also proposed. (A.L.B.)

  1. Energy situation August 2005; Conjoncture energetique aout 2005

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-09-15

    The monthly energy situation analysis in France at August 2005 is presented. Statistics are given for energy consumption, demand, import and export. A special attention is given to the primary energy, the solid fuels, the petroleum products, the natural gas and the electric power. (A.L.B.)

  2. Energy situation september 2005; Conjoncture energetique septembre 2005

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-10-15

    The monthly energy situation analysis in France at september 2005, is presented. Statistics are given for energy consumption, demand, import and export. A special attention is given to the primary energy, the solid fuels, the petroleum products, the natural gas and the electric power. (A.L.B.)

  3. Energy situation, January 2006; Conjoncture energetique, janvier 2006

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-03-15

    The monthly energy situation analysis in France, at January 2006, is presented. Statistics are given for energy consumption, demand, import and export. A special attention is given to the primary energy, the solid fuels, the petroleum products, the natural gas and the electric power. (A.L.B.)

  4. amelioration de la viscosite et de la densite energetique

    African Journals Online (AJOL)

    Les grains germés de riz et de mil ont été réduits séparément en farine (malt). Dans chaque formule, 95 % de la farine composée ont été ajoutés à 5 % de malt de mil ou de riz. La viscosité et la densité énergétique des bouillies infantiles ont été déterminées. La viscosité de la bouillie contenant le malt de riz a été plus fluide ...

  5. Cinéticas de transformación de fases a 850 ºC de aceros inoxidables dúplex clásicos (2205 y 2507 y de uno nuevo de bajo contenido en níquel y alto en manganeso (DBNi

    Directory of Open Access Journals (Sweden)

    Rodríguez, M. P.

    2004-04-01

    Full Text Available Austenitic-ferritic stainless steels are formed by ferrite and austenite in a variable proportion between 30 % and 70 %. Their chemical composition conditions the ageing processes that can happen during heat treatments, where phases that hardens and brittles the material can be generated. Evolution of a new duplex stainless steel with lower nickel and higher nitrogen and manganese content maintained at 1123 K (critical precipitation temperature up to 8 hours compared to classical ones (2205 and 2507 is presented. The study, done by magnetic measurements, XRD, optical and scanning electron microscopy and microanalysis, revealed a roughly similar behaviour for the three steels. The new one presents a higher initial stability, probably due to the high nitrogen and manganese contents; however, it also produces the higher final transformation due to the higher initial ferrite. A fine comparative analysis was done to correctly identify any phase; an accurate microanalysis in every generated phase was performed. All the steels tested are initially made on ferrite and austenite. After the ageing treatment, 8 hours at 1123 K, in the 2205 duplex steel a strong precipitation of sigma phase is observed, austenite and some of the original ferrite are also present; ferrite completely transforms in the 2507 duplex and austenite, sigma, secondary austenite and chromium nitride can be found; regarding the new duplex steel DBNi, austenite, ferrite, sigma, chi and chromium nitrides are detected.

    Los aceros dúplex austeno-ferríticos están constituidos por ferrita y austenita en proporciones variables del 30 % al 70 %. Su composición química condiciona los procesos de envejecimiento que sufren durante los tratamientos térmicos, cuando se generan fases que endurecen y fragilizan el material. Este trabajo estudia la evolución de un nuevo inoxidable dúplex con bajo contenido en níquel y alto en nitrógeno y manganeso a 1123 K (temperatura crítica de

  6. Seleção de parâmetros através do método Taguchi para soldagem de revestimento com ligas de níquel pelo processo MIG/MAG Using the Taguchi method to select welding parameters for weld overlay with nickel alloy through the GMAW process

    Directory of Open Access Journals (Sweden)

    Antonio Rodolfo Paulino Pessoa

    2010-12-01

    Full Text Available Neste trabalho utilizou-se o método Taguchi (planejamento Robusto de experimentos, para cumprir com um reduzido número de ensaios, dois objetivos: obter a influência dos fatores de controle sobre as variáveis respostas e determinar as condições ideais para aplicação das ligas de níquel nas soldagens de revestimentos através do processo MIG/MAG com transferência metálica por curto-circuito. Foram escolhidos seis fatores de controle com três níveis cada: Tensão de referência, Velocidade de soldagem, Tipo de tecimento, Técnica da tocha, Gás de proteção e o Material de adição. Por sua vez as variáveis respostas escolhidas foram: Diluição (D e Razão entre o reforço e a largura (R/L. As soldagens foram realizadas na posição plana por simples deposição sobre chapas de aço ASTM 516 Gr60 com dimensões de 200 x 50 x 12,7 mm. O uso do tecimento proporcionou cordões com baixos valores da razão R/L e obteve valores bastante baixos de diluição chegando à ordem de 5%. A combinação dos níveis dos fatores de controle apontados como ótimos pelo método Taguchi resultaram em valores para as variáveis repostas consideradas adequadas para a soldagem de revestimento.In this work aim the Taguchi method (Robust design of experiments was chosen to achieve with a limited number of tests two objectives: the first was to the influence of the control factors (welding parameters on quality characteristics (weld bead geometry and the second was to determine optimal conditions for weld overlay with nickel alloy through the GMAW process in a short circuiting transfer mode. Six control factors were employed with three levels each: Reference voltage, Welding speed, Arc oscillation, welding gun orientation (Perpendicular, forehand and backhand, Shielding gas and filler metal. Already the employed quality characteristics were: Percent dilution (D and the ration between reinforcement and bead width (R/L. The weldings were accomplished using

  7. Seleção dos parâmetros através dos custos de soldagem para aplicação de revestimento com ligas de níquel depositadas pelo processo MIG/MAG Using the welding costs to select welding parameters for Weld Overlay with nickel alloy through the GMAW process

    Directory of Open Access Journals (Sweden)

    Antonio Rodolfo Paulino Pessoa

    2011-03-01

    Full Text Available Neste trabalho foram calculados e comparados os custos de soldagem associados a cada um dos ensaios realizados, como forma de determinar parâmetros operacionais adequados e economicamente viáveis para soldagem com o processo MIG/MAG com transferência metálica por curto-circuito, visando uma correta deposição de revestimentos com ligas de níquel sobre um substrato de aço C-Mn. O número de ensaios a serem realizados, foi determinado pelo uso do método Taguchi que dividiu os ensaios em duas matrizes L9, resultando num total de 18 ensaios. Na comparação dos gastos despendidos em cada um dos ensaios foi utilizado o custo direto total da soldagem de um revestimento com 55 mm de largura e 190 mm de comprimento, utilizando uma sobreposição de 50%. Com base nos resultados dos ensaios foram pré-selecionados quatro ensaios (R7, R11, R12 e RC4, dentre os quais o ensaio R11 apresentou o menor custo. Mas vale ressaltar que nos quatro ensaios pré-selecionados o material de adição utilizado foi a liga 625, pois esta liga apresentar um custo do arame-eletrodo muito inferior as demais ligas (C-276 e 686. Assim a escolha do material de adição para aplicação do revestimento ficou restrita somente a liga 625.In this work were calculated and compared the welding costs for each of the tests performed to determine operational parameters and economically feasible for welding with GMAW process in a short circuiting transfer mode, aiming at a correct weld overlay with nickel alloy on a substrate of C-Mn steel. The number of tests to be performed was determined by using the Taguchi method that divided the tests into two L9 orthogonal arrays resulting in a total of 18 experiments. To compare the costs incurred in each of the tests we used the total direct cost of welding a layer with dimensions of 55 x 190 mm, using an overlap of 50%. Based on the results of the tests were pre-selected four tests (R7, R11, R12 and RC4, among which the test R11 has the

  8. Energy policy conference on the regulation of energy industries; Conference de politique energetique sur la regulation des industries energetiques

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-11-01

    This document is the report of the conference meeting jointly organized by the French general plan commission and the general direction of energy and raw materials on the regulation of energy industries: 1 - the changes in the regulation of public utilities in competition: harmonization, respect of impartiality and social cohesion, organization of a loyal competition, specialized regulation and regulation of competition, open debates; 2 - towards an homogenous model of regulatory authority?: the US model (collegial and hybrid organizations), the UK model (individual and independent), missions of regulation and institutional 'meccano', theory and practice, draft classification of the institutional approaches of IEA countries (role of ministries and regulatory agencies), independent regulatory authorities or not, significant differences in converging models, dominant types of regulation in the different sectors, situation of the French energy regulatory system (institutional plan, regulation processes, relations of the regulation authority with the government), reasons of the differences between different countries, expected evolution of the regulation systems in the coming years. (J.S.)

  9. Energy policy conference on the regulation of energy industries; Conference de politique energetique sur la regulation des industries energetiques

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-11-01

    This document is the report of the conference meeting jointly organized by the French general plan commission and the general direction of energy and raw materials on the regulation of energy industries: 1 - the changes in the regulation of public utilities in competition: harmonization, respect of impartiality and social cohesion, organization of a loyal competition, specialized regulation and regulation of competition, open debates; 2 - towards an homogenous model of regulatory authority?: the US model (collegial and hybrid organizations), the UK model (individual and independent), missions of regulation and institutional 'meccano', theory and practice, draft classification of the institutional approaches of IEA countries (role of ministries and regulatory agencies), independent regulatory authorities or not, significant differences in converging models, dominant types of regulation in the different sectors, situation of the French energy regulatory system (institutional plan, regulation processes, relations of the regulation authority with the government), reasons of the differences between different countries, expected evolution of the regulation systems in the coming years. (J.S.)

  10. Enjeux, difficultés et modalités de l’expression sur le travail : point de vue de la clinique médicale du travail Concerns in occupational medicine about stakes, difficulties and conditions of dispute about work Retos, dificultades y modalidades de la expresión sobre el trabajo : punto de vista de la clínica médica del trabajo

    Directory of Open Access Journals (Sweden)

    Philippe Davezies

    2012-11-01

    Full Text Available L’intensification du travail oblige les salariés de tous secteurs et de tous niveaux hiérarchiques à des arbitrages serrés entre les différents objectifs du travail. Faute d’espace de discussion, chacun se débrouille seul, avec comme conséquence une individualisation des questions, une montée des conflits et une dégradation de la performance. Cette situation appelle la mise en place des espaces d’expression sur le travail, prévus dans la loi française. Cette orientation se heurte cependant à une difficulté : l’activité du travailleur est en avance sur sa conscience et beaucoup plus riche que ce qu’il est capable d’exprimer. Des espaces autonomes d’élaboration des enjeux du travail sont nécessaires pour créer les conditions d’une discussion avec la hiérarchie susceptible de porter ses fruits dans le domaine de la santé au travail et dans celui de la performance globale de l’entreprise.Regardless of the job sector or hierarchical position, work intensification forces workers to make hard choices between the different goals they are expected to meet. Due to a lack of discussion, people have to manage by themselves. The consequences are a rising tide of interpersonal conflicts and occupational stress associated with a deterioration in overall performance. This situation requires that time and places be set aside for work disputes, in keeping with French law. Nevertheless, there is a serious difficulty in actualizing this law: the worker’s tacit knowledge of his work is much richer than his conscious ability to verbalize and describe the work activity. Self-governed, employee-reserved times and places for working out the stakes at issue are necessary before discussing with the administration if we are to arrive at favourable results for occupational health and overall company performance.La intensificación del trabajo obliga a los empleados, independientemente del sector o del nivel jerárquico al que

  11. Challenges of Agricultural Adaptation to Climate Change in Nigeria: a Synthesis from the Literature Les enjeux de l’adaptation agricole au changement climatique au Nigéria : synthèse de la littérature Retos de la adaptación agrícola al cambio climático en Nigeria: una síntesis de la literatura

    Directory of Open Access Journals (Sweden)

    Anselm A. Enete

    2010-12-01

    services, and encouragement for the formation of farmer groups.Le changement climatique est peut-être la menace environnementale la plus sérieuse qui pèse sur la lutte contre la faim, la malnutrition, les maladies et la pauvreté en Afrique, principalement en raison de son impact sur la productivité agricole. Cet article aborde les enjeux de l’adaptation agricole au changement climatique au Nigéria dans les catégories Faim et Pauvreté ; Financement de la recherche et du développement de technologies dans le secteur de l’agriculture ; Pratiques agricoles traditionnelles ; Libéralisation des échanges commerciaux et Développement du marché ; Politiques, Institutions et Biens publics ; et Informations et Capital humain. La population rurale, qui produit plus de 70 % des denrées alimentaires consommées au Nigéria, est extrêmement pauvre et doit faire face à la malnutrition et aux maladies. L’Etat, tout comme le secteur privé, qui devraient stimuler le secteur par le biais de politiques cohérentes de financements solides et du développement d’infrastructures, n’ont pas accordé au problème la priorité qu’il mérite. En outre, les bénéfices attendus de la libéralisation du commerce n’ont pas été répercutés sur les agriculteurs africains, ce qui n’est pas sans relation avec l’inefficacité du système des marchés locaux. Par ailleurs, les agriculteurs sont lents à modifier leurs pratiques agricoles, comme les feux de brousse, la déforestation et l’agriculture pluviale. Ils manquent de l’éducation, des informations et de la formation nécessaires pour s’adapter au changement climatique. Le gouvernement devrait non seulement décentraliser ses programmes sur la pauvreté / le VIH-SIDA et sur la recherche agricole (financement et activités mais aussi les rendre participatifs. En outre, différents éléments pourraient être mis en place : un cadre de politique agricole nationale explicite ; une planification des systèmes d

  12. Adaptation posologique des médicaments et fonction rénale : Quel(s) estimateur(s) faut-il choisir?

    OpenAIRE

    DELANAYE, Pierre; Flamant, M; CAVALIER, Etienne; Guerber, F; Valloton, T; Moranne, O; Pottel, H; Boffa, JJ; Mariat, C

    2016-01-01

    Le choix de la formule d’estimation du de´ bit de filtration glomérulaire (DFG) a` utiliser pour l’adaptation posologique fait encore de´ bat, principalement entre la formule de Cockcroft et les équations plus récentes, MDRD (pour Modified Diet in Renal Disease) et CKD-EPI (pour Chronic Kidney Disease Epidemiology). Les arguments mis en avant en faveur de l’utilisation de la formule de Cockcroft sont : qu’elle a été préférentiellement utilisée pour décider des adaptations posologiques avant l...

  13. Individual response to ionising radiation: What predictive assay(s) to choose?; Reponse individuelle aux radiations ionisantes: quel(s) test(s) predictif(s) choisir?

    Energy Technology Data Exchange (ETDEWEB)

    Granzotto, A.; Viau, M.; Devic, C.; Maalouf, M.; Thomas, Ch.; Vogin, G.; Foray, N. [Inserm, U836, groupe de radiobiologie, institut des neurosciences, chemin Fortune-Ferrini, 38042 Grenoble (France); Granzotto, A.; Vogin, G.; Balosso, J. [Centre de hadrontherapie Etoile, 69008 Lyon (France); Joubert, A. [Societe Magelis, 84160 Cadenet (France); Maalouf, M. [Centre national d' etudes spatiales, 75001 Paris (France); Vogin, G.; Colin, C. [EA 3738, faculte de medecine, Lyon-Sud, 69921 Oullins (France); Malek, K.; Balosso, J. [Service de radiotherapie, CHU A.-Michallon, 38042 Grenoble (France); Colin, C. [Service de radiologie, CHU Lyon-Sud, 69490 Pierre-Benite (France)

    2011-02-15

    Individual response to ionizing radiation is an important information required to apply an efficient radiotherapy treatment against tumour and to avoid any adverse effects in normal tissues. In 1981, Fertil and Malaise have demonstrated that the post-irradiation local tumor control determined in vivo is correlated with clonogenic cell survival assessed in vitro. Furthermore, these authors have reminded the relevance of the concept of intrinsic radiosensitivity that is specific to each individual organ (Fertil and Malaise, 1981) [1]. To date, since clonogenicity assays are too time-consuming and do not provide any other molecular information, a plethora of research groups have attempted to determine the molecular bases of intrinsic radiosensitivity in order to propose reliable and faster predictive assays. To this aim, several approaches have been developed. Notably, the recent revolution in genomic and proteomics technologies is providing a considerable number of data but their link with radiosensitivity still remains to be elucidated. On another hand, the systematic screening of some candidate genes potentially involved in the radiation response is highlighting the complexity of the molecular and cellular mechanisms of DNA damage sensing and signalling and shows that an abnormal radiation response is not necessarily due to the impairment of one single protein. Finally, more modest approaches consisting in focusing some specific functions of DNA repair seem to provide more reliable clues to predict over-acute reactions caused by radiotherapy. In this review, we endeavored to analyse the contributions of these major approaches to predict human radiosensitivity. (authors)

  14. Computer Security Day

    CERN Multimedia

    CERN Bulletin

    2010-01-01

      Viruses, phishing, malware and cyber-criminals can all threaten your computer and your data, even at CERN! Experts will share their experience with you and offer solutions to keep your computer secure. Thursday, 10 June 2010, 9.30, Council Chamber Make a note in your diary! Presentations in French and English: How do hackers break into your computer? Quels sont les enjeux et conséquences des attaques informatiques contre le CERN ? How so criminals steal your money on the Internet? Comment utiliser votre ordinateur de manière sécurisée ? and a quiz: test your knowledge and win one of the many prizes that will be on offer! For more information and to follow the day's events via a live webcast go to: http://cern.ch/SecDay.  

  15. Experience, potential and photovoltaic Algerian market; Experience, potentiel et marche photovoltaique algerien

    Energy Technology Data Exchange (ETDEWEB)

    Khelif, Amar

    2010-09-15

    The various studies concerning solar energy are showing a considerable potential for the use of this energy form in Algeria. Aware of the growing interest for this energy and of the issues, Algeria has integrated its development in its energy policy by: the adoption of a legal framework in favor of this energy expansion, the planning of important hybridization projects of diesel plants, the launch of two large electrification projects and the planning of a photovoltaic modules fabrication plant. These projects are part of a national development plan of renewable energy. [French] Les diverses etudes concernant l'energie solaire font apparaitre un potentiel considerable pour l'utilisation de cette forme d'energie en Algerie. Consciente de l'interet grandissant de cette energie et de ses enjeux, l'Algerie a integre son developpement dans sa politique energetique par : l'adoption d'un cadre juridique favorable a l'expansion de cette energie, la planification d'importants projets d'hybridation de centrales diesel, le lancement de deux grands programmes d'electrification et la projection d'une usine de fabrication de modules photovoltaiques en est la parfaite illustration. Ces projets s'nscrivent dans le cadre d'un plan national de developpement des energies renouvelables.

  16. Energy perspectives of the France by 2020-2050. Energy scenario; Perspectives energetiques de la France a l'horizon 2020-2050. Scenarios energetiques

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-09-15

    The aim of the working group was to realize quantitative approaches of the french energy system by 2020-2050 supporting the reflexions of the Energy Commission. The presented scenario are not prevision of the future. They just allow, in function of the hypothesis and the models used, to establish an approach of the consequences in term of the final energy demand. Two simulation tools were used and described in the chapter 3: Medpro-Poles and Markal-Times. The scenario are analyzed in the chapters 4 and 5. Results allow to see how the proposed measures are sufficient to reach in France the main objectives proposed by the european union. (A.L.B.)

  17. Les enjeux stratégiques de la théorie du discours chez Foucault

    Directory of Open Access Journals (Sweden)

    Corneliu Bilba

    2014-12-01

    Full Text Available In order to fully understand Michel Foucault’s archeology of knowledge it is necessary to put it not only in the context of the discourse theories of the French school, but also in that of the linguistic theories of science. On the one hand, Foucault rejects the representational theory of scientific language (developed by Carnap and others. In his analysis of the discourse of the human sciences, with its complicated definition of the statement (énoncé, he aims to show that we cannot limit the language of knowledge to a vocabulary. On the other hand, Foucault’s approach is a serious challenge to structuralism because it is impossible to analyze the language of savoirs without taking into account the statement’s correlate (the referent issue. If the discourse of sciences is an artificial vocabulary created by means of the purification of the natural language, Saussure’s semiology could not compete against the conceptual dynamics of representational semiotics, and should admit that, in the cognitive usage, signs are representations. Therefore, Foucault admits that the statement has a correlate, that this correlate is not a physical object and that it functions as a historical structure of the discourse. This structure (épistémè can be seen as a norm; the changing of this norm cannot be identified but in the archive and its description is always retrospective, structural and archaeological.

  18. Vers une agroécologie biodiverse : enjeux et principaux concepts mobilisés

    OpenAIRE

    Reboud , Xavier; MALEZIEUX , Eric

    2015-01-01

    SPEPôle ECOLDUR; This text relates to the introduction of the workshop “Using biodiversity” given on October, 18th at the 2013 symposium on Agroecology. It is inspired by the discussions of the working group "Agroecology and soil" of the alliance between institutes on environmental research AllEnvi. Some major issues are exposed and the principles on how the use of biodiversity could improve agroecosystem management are presented.; Ce texte constitue l’introduction à l’atelier « utiliser la B...

  19. Camps de réfugiés et environnement au Kenya : enjeux et contradictions

    OpenAIRE

    Cambrézy, Luc

    2001-01-01

    Dans les camps de réfugiés de Dadaab, au Kenya, un programme de protection environnementale et de réhabilitation du couvert végétal a été mis en place plusieurs années avant tout réel diagnostic sur l'ampleur et l'origine réelle des dégradations constatées. Des études ultérieures ont montré que les auréoles de dégradation autour des camps semblent essentiellement imputables aux besoins ligneux pour la construction et la maintenance des nombreuses infrastructures et non pas à la collecte de bo...

  20. Anthropologie des enjeux de la violence chez lagunaires de Côte d ...

    African Journals Online (AJOL)

    Introduction. Dans la littérature des sciences sociales relatives à la Côte d'Ivoire, depuis la ... formes spécifiques d'expression que nous présenterons apparaissent comme étant des ... dans les communautés lagunaires et leur transformation. ..... politique et social des classes d'âge pour lesquels l'idéologie et les structures.

  1. Oil and international security: old and new issues; Petrole et securite internationale: de nouveaux enjeux

    Energy Technology Data Exchange (ETDEWEB)

    Noel, P

    1998-09-01

    This paper questions the effectiveness of the link between international oil and (inter)national security. First, it explains an acknowledge the rise and decline of the traditional case of this link: the threat that so called ''oil dependence'' inflicts upon the national economy, hence the problem it raises for government. The reason for that decline is looked for in the emergence of multiple forms of competition in oil and energy markets, making the ''oil weapon'' less credible and its use less desirable and less possible. In oil like in any other commodity, the normal situation is the competition between suppliers for access to markets. For all basic economics tells us and experience has confirmed, analyses and policies (at least in France) are still strongly influenced by the ''oil security'' thinking shaped in the eve of the 1970 crises. Yet, those fallacies may be the strongest obstacle to the acknowledgment of the real oil security issues we face. The main one is the possible political destabilization of the Middle East due to oil competition between its members in an increasingly competitive world market. The consequences on regional antagonisms of the come back of Iraqi oil to the market on one hand, the internal stability of Iran and Saudi Arabia in a situation of lasting low oil revenues on the other hand, are reviewed as the main possible factors of regional destabilization in a context of strong competition in the world oil market. A large scale political burst with major oil producers concerned would certainly hurt developed and developing economy. That leads us to this paradoxical situation: the very cause of the decline of the traditional oil dependence issue is, due to Middle East situation, the main cause of possible destabilization of world oil market today. (author)

  2. LE RISQUE DE LIQUIDITE POUR UNE BANQUE ISLAMIQUE : ENJEUX ET GESTION

    OpenAIRE

    KHOUTEM, BEN JEDIDIA; MOULDI, JLASSI

    2013-01-01

    La liquidité est une question cruciale pour les banques islamiques. L’enjeu de la liquidité et sa gestion présentent des défis pour ces banques. D’abord, les banques islamiques sont exposées au risque de liquidité3 dans un contexte de faiblesses structurelles du système financier qui pèsent sur leur solvabilité et leur liquidité (Sundararajan and Errico, 2002 ; Salman, 2004 ; El-Hawary et al, 2007 ; Akkizidis et Khandelwal, 2008, Al-Muharrami et Hardy, 2013). En fait, la plupart des banques i...

  3. Le coton dans le monde, place du coton africain et principaux enjeux

    Directory of Open Access Journals (Sweden)

    Hofs JL.

    2006-01-01

    Full Text Available Cotton in the world, the position of African cotton and the major stakes. Cotton farming is a very old activity. More recently, cotton fi bre production impacted industrial history and allowed a tremendous rise of the textile industry. African cotton cropping, which mainly relies on rainfed agriculture, family farming and hand picking, is very different compared with the one conducted in large scale farming countries dealing with intensifi cation systems, irrigation and capital intensive management. An analysis of fundamentals of the world offer and demand for cotton initially highlights that China, UnitedStates, followed by India and Pakistan are major actors at the production level and count for more than two thirds of the worldvolumes. For several decades, the international cotton fibre consumption increased at an annual average rate that was very close to the one of the production. The main producers are also the main cotton consumers. Among them, China is the most important by far, absorbing more of the third of world consumption in 2004. This tendency will still clearly increase during next years. The large world cotton fi bre suppliers are, fi rst of all, the United States, followed by the African countries of FCFA zone. As most of the other agricultural basic commodities, the international cotton prices are characterized by a downward long-term trend. China has a strong incidence on this world market, because of its statute of fi rst producer and consumer.Production cost decrease noted in a great number of countries does not explain by itself price reduction. It is kept up with other factors: the subsidies granted by some countries to their cotton producers, in particular the United States. Cotton represents a substantial economic and social importance for the African countries which grow it, in particular those of fCFA zone. But, whereas cotton crop allowed these countries and their populations adopting undeniable socio-economic progress, it gives them nowadays a lot of trouble. Thus, after having suffered various crises during the last decades, African cotton chains are now confronted with a major crisis, without precedent by its extent. The stakes raised by cotton cropping in these African countries are numerous and complex. They constitute real challenges to be taken up. The main ones are underlined: competitive positionof African cotton in the world market; competition with synthetic fi bres; stakes of biotechnological crops; increase in the costsof the factors of production; aspects related to the quality of African cotton; diversifi cation of the productions; development ofnew cotton chains; local transformation of fi bre and valorisation of by-products; environmental concerns. In this context, we observe the emergence of African cotton farmer associations which are widening and investing, both in their own cotton chain and on the international scene, a new fi eld of infl uence.

  4. Un bilan des enjeux et impacts de l’écotourisme au Costa Rica

    Directory of Open Access Journals (Sweden)

    Fabiola Nicolas

    2008-02-01

    Full Text Available IntroductionS’étirant sur 520 000 km², l’Amérique centrale est une région constituée d’un long isthme étroit formé entre l’Amérique du Nord et l’Amérique du Sud. Outre la péninsule du Yucatan et du Mexique, cette région comprend du Nord au Sud, sept états dont le Guatemala, le Belize, le Salvador, le Honduras, le Nicaragua, le Costa Rica et le Panama.Cette région fut marquée pour son instabilité économique, sociale et politique et à ce titre, elle a longtemps été perçue – et le reste encore –...

  5. Agriculture dans la ville, agriculture pour la ville : acteurs, pratiques et enjeux

    OpenAIRE

    Poulot, Monique

    2018-01-01

    En Décembre 1992, une séance de l’Association de Géographes Français interrogeait le « devenir des agricultures périurbaines » [Brunet & Charvet 1994]. Jean-Paul Charvet soulignait qu’il semblait désormais « possible de concilier développement urbain et maintien d’espaces agricoles et ruraux vivants du moment où une convergence de volontés s’exprimait en ce sens » [Charvet 1994, p. 120] si bien que ces espaces d’agriculture périurbaine apparaissaient comme « des espaces agricoles complexes où...

  6. La lecture numérique réalités, enjeux et perspectives

    CERN Document Server

    Bélisle, Claire; Vathaire, Jean-Baptiste de; Ducharme, Christian

    2004-01-01

    En se déplaçant progressivement du papier vers l'écran, les pratiques de lecture s'adaptent et se transforment. Dans quelle mesure la place prise par l'information dans la société et la prépondérance des technologies et des supports numériques, en bouleversant les habitudes liées aux textes, mettent-elles en péril certaines de ces pratiques ? Comment lirons-nous demain ? En analysant les caractéristiques des nouveaux médias et en rendant compte des expériences de lecture d'œuvres numériques, cet ouvrage fait le point sur la place actuelle et les perspectives de la lecture sur les supports numériques, et particulièrement sur les livres électroniques. Les divers chapitres donnent des informations factuelles et des points de repère sur la lecture sur écran, sur son avenir et sur les conditions de son utilisation notamment par les bibliothèques. Les apports des différents spécialistes qui ont contribué à cet ensemble constituent un précieux outil pour appréhender l'impact culture de la ...

  7. Tourisme durable en zone de montagne : définition et enjeux

    OpenAIRE

    ZEGHNI, Sylvain

    2014-01-01

    La montagne est depuis longtemps un territoire de tourisme. Paradoxalement, pendant longtemps, la France a connu un déficit d'exploitation touristique hivernale de son massif. Les plans neige des années 60 et 70 eurent pour ambition de rattraper ce retard et de faire de notre pays la première destination de sport d'hiver. Cette ambition ayant été atteinte, le tourisme hivernal en zone de montagne est aujourd'hui un puissant levier économique d'aménagement et de développement. Il n'en reste pa...

  8. L‘agriculture en Afrique sub-saharienne : enjeux et perspectives

    Directory of Open Access Journals (Sweden)

    Hugon Philippe

    2002-11-01

    Full Text Available L’agriculture africaine a connu en longue période un développement limité. La faible productivité de l’agriculture est un facteur essentiel de blocage de l’économie. L’Afrique sub-saharienne (ASS est toutefois contrastée. Cet article présente certains symptômes de la crise agricole puis analyse les effets des politiques de libéralisation de filières avant de dégager les perspectives notamment des rendements et de la productivité, et les risques environnementaux compte tenu des défis internes et mondiaux auxquels l’Afrique sera confrontée dans les prochaines années.

  9. Oil and international security: old and new issues; Petrole et securite internationale: de nouveaux enjeux

    Energy Technology Data Exchange (ETDEWEB)

    Noel, P

    1998-09-01

    This paper questions the effectiveness of the link between international oil and (inter)national security. First, it explains an acknowledge the rise and decline of the traditional case of this link: the threat that so called ''oil dependence'' inflicts upon the national economy, hence the problem it raises for government. The reason for that decline is looked for in the emergence of multiple forms of competition in oil and energy markets, making the ''oil weapon'' less credible and its use less desirable and less possible. In oil like in any other commodity, the normal situation is the competition between suppliers for access to markets. For all basic economics tells us and experience has confirmed, analyses and policies (at least in France) are still strongly influenced by the ''oil security'' thinking shaped in the eve of the 1970 crises. Yet, those fallacies may be the strongest obstacle to the acknowledgment of the real oil security issues we face. The main one is the possible political destabilization of the Middle East due to oil competition between its members in an increasingly competitive world market. The consequences on regional antagonisms of the come back of Iraqi oil to the market on one hand, the internal stability of Iran and Saudi Arabia in a situation of lasting low oil revenues on the other hand, are reviewed as the main possible factors of regional destabilization in a context of strong competition in the world oil market. A large scale political burst with major oil producers concerned would certainly hurt developed and developing economy. That leads us to this paradoxical situation: the very cause of the decline of the traditional oil dependence issue is, due to Middle East situation, the main cause of possible destabilization of world oil market today. (author)

  10. Les enjeux de la bataille de Mânû (283/896

    Directory of Open Access Journals (Sweden)

    Virginie Prevost

    2014-07-01

    Full Text Available En mai 896, l’armée aghlabide conduite par Ibrâhîm II écrasa les Nafûsa ibâḍites à Mânû sur la côte tripolitaine, bataille suivie par plusieurs campagnes dans le djebel Nafûsa et dans le Sud tunisien, à Qanṭrâra et dans le Nafzâwa. La bataille de Mânû constitue pour les ibâḍites du Maghreb un souvenir historique important, et elle représente surtout un tournant crucial dans leur histoire, souvent relié par leurs historiens à la chute de l’imamat de Tâhart. Cet article, tout en retraçant le déroulement et les conséquences de cet événement, s’interroge sur la composition et l’évolution de l’ibâḍisme au Maghreb à cette période. Il propose également une comparaison entre les différents récits disponibles dans les sources malékites et ibâḍites afin de mieux souligner l’importance de l’événement dans la mémoire historique du Maghreb.

  11. REPORTING SOCIETAL : LIMITES ET ENJEUX DE LA PROPOSITION DE NORMALISATION INTERNATIONALE " GLOBAL REPORTING INITIATIVE "

    OpenAIRE

    Michel Capron; Françoise Quairel

    2003-01-01

    International audience; En s'inspirant de la normalisation comptable anglo-saxonne, la Global Reporting Initiative (GRI) propose un référentiel de publication volontaire d'informations sociétales. La transposition présente des limites qui rendent en fait ses principes inapplicables. Néanmoins il tend à s'imposer et les grandes entreprises peuvent y trouver le moyen d'éviter une régulation contraignante.

  12. Le cosmopolitisme : enjeux et débats contemporains

    OpenAIRE

    Chung, Ryoa; Nootens, Geneviève

    2018-01-01

    Nous vivons dans un monde trouble. Pourtant, cet ouvrage est consacré à l’idéal cosmopolitique. Notre lot contemporain de tragédies humaines tributaire des conflits armés, des désastres naturels, de l’inégalité abyssale entre les uns et les autres ainsi que des représentations idéologiques de toute obédience (de l’intégrisme fanatique à l’impérialisme éhonté, en passant par le capitalisme le plus sauvage) n’est sans doute pas unique au XXIe siècle débutant. Mais il n’en demeure pas moins que ...

  13. Les Enjeux Éthiques d'Internet en Afrique de l'Ouest: Vers un ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    consolider les activités de veille et d'information sur le progrès des États membres ...... car on ne cite plus ses sources et on pratique le « copier-coller » à outrance. ...... DHERSE, Jean-Loup, MINGUET, Dom Hugues, L'éthique ou le chaos ?

  14. Risques environnementaux et enjeux à Clipperton (Pacifique français)

    OpenAIRE

    Jost, Christian

    2005-01-01

    Sur l’atoll inhabité de Clipperton, quatrième territoire français du Pacifique, les écosystèmes terrestres et lagonaires se dégradent de façon préoccupante tandis que les risques naturels sont majeurs. Depuis les années soixante, un processus de désertification de la couronne a été enclenché suite à l’élimination du porc introduit à la fin du XIXe siècle et à la prolifération consécutive des crabes terrestres omnivores et à celle de milliers d’oiseaux de mer. L’absence de végétation correspon...

  15. Les enjeux économiques de la jouissance esthétique.

    Directory of Open Access Journals (Sweden)

    Hélène Bourdeloie

    2010-01-01

    Full Text Available Professeur de philosophie et responsable de la recherche à l’Institut français de la mode, Olivier Assouly signe ici un ouvrage intéressant pour qui veut comprendre comment le capitalisme a pu se saisir du plaisir esthétique pour en faire un vecteur de profit. Le sous-titre de l’ouvrage, L’industrialisation du goût , est d’ailleurs là pour montrer que le goût est devenu une valeur monnayable qui, pour l’auteur, tient véritablement lieu de « matrice de l’appareil ...

  16. Les enjeux éthiques d'internet en Afrique de l'Ouest : Vers un ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Le monde entier connaît actuellement un profond changement lié au développement du réseau mondial de l'information et de la communication : internet. Ce bouleversement touche toutes les sphères du social et cet ouvrage porte spécifiquement sur les aspects éthiques de l'usage d'internet en Afrique de l'Ouest.

  17. Les Enjeux normatifs et politiques de la diffusion de la recherche

    DEFF Research Database (Denmark)

    Landes, Xavier

    2014-01-01

    Knowledge is a cooperative activity, which is essential to industrial societies. Basis of their economic model, it also produces numerous material, socio-political and distant benefits. In this context, it becomes important to determine the principles that should orientate the reparation of the c......Knowledge is a cooperative activity, which is essential to industrial societies. Basis of their economic model, it also produces numerous material, socio-political and distant benefits. In this context, it becomes important to determine the principles that should orientate the reparation...

  18. Enjeux et pratiques documentaires en conservation-restauration, perspectives pour la recherche 

    Directory of Open Access Journals (Sweden)

    Marie-Hélène Breuil

    2010-11-01

    Full Text Available IntroductionConsacrées à la documentation des œuvres, ces deux journées d’étude qui se sont tenues les 14 et 15 octobre 2010 comportaient quatre sessions : définition, production, gestion et utilisation. Elles ont permis de faire le point et d’échanger sur les outils techniques, les contenus, l’accès ainsi que la conservation de cette documentation. Dans son introduction, Thierry Lalot, directeur du CRPB (Université Paris 1, a souligné la volonté d’ouvrir des perspectives pour la recherche e...

  19. Francis Jauréguiberry & Serge Proulx, Usages et enjeux des technologies de communication

    Directory of Open Access Journals (Sweden)

    Jean-Pierre Durand

    2013-03-01

    Full Text Available Ce petit ouvrage propose une très large revue de littérature sur les usages des technologies de l’information et de la communication. On peut dire que cet ouvrage est complet, en particulier parce qu’il couvre aussi la production intellectuelle du monde anglo-saxon. Il est très agréable à lire parce que les thèses y sont exposées clairement. C’est aussi un ouvrage qui reprend l’historique des usages des TIC et leurs analyses dans les sciences humaines. Le premier chapitre propose un cadrage t...

  20. Enjeux de territoires sur une frontière méconnue

    Directory of Open Access Journals (Sweden)

    Françoise Grenand

    2012-11-01

    Full Text Available « J’ai travaillé dans le temps sur le chantier d’un pont sur le Zambèze. Je me suis toujours demandé pourquoi ils avaient décidé de faire un pont à cet endroit : c’est la même chose sur les deux rives… ». Humphrey Bogart, in African Queen, de John Huston, 1951.Il y a encore quatre décennies, la Guyane ignorait superbement qu’elle eût un voisin nommé Brésil. Une frontière en commun ? Et même la plus longue frontière terrestre de la France ? Les deux seules librairies du département ne proposai...

  1. Nuclear energy: what scenarios for the future?; Nucleaire: quels scenarios pour le futur?

    Energy Technology Data Exchange (ETDEWEB)

    Chatelier, Michel; Criqui, Patrick; Heuer, Daniel; Huet, Sylvestre

    2012-01-20

    Because of its energetic, environmental, economical, social, safety, political, and even ideological aspects, the nuclear energy is a major society stake. It is a technical and complex topic as well which merits a democratic, well argued and transparent debate. This book supplies to the reader all the necessary information for a thorough analysis of this much disputed energy source without any bias: why France is one of the most nuclearized country in the world? Can we get out of nuclear energy? How and at what price? Wastes and safety: what can we expect (or not) from the next generations of reactors? Should we have a referendum? In this book, two researchers of the nuclear domain, an economist and a journalist invite us to consider the problem from all angles. (J.S.)

  2. QUEL CHE RESTA DELLA PSICANALISI. UNA LETTURA MERLEAU‐PONTIANA DI FREUD

    Directory of Open Access Journals (Sweden)

    Scotti, Alessandra

    2015-12-01

    Full Text Available This paper investigates Maurice Merleau‐Ponty’s interest about Freud’s philosophical works. It invokes the Freud’s recognition as “Master of the School of suspicion”, a famous definition made by Paul Ricœur. According to Ricœur, Freud’s theories take place within the philosophical stream that looks at “constituted cogito” with deep mistrust. Through the analysis of “Phenomenology of Perception” we can observe the accusation of “pansexuality” moved by Merleau‐Ponty. However, as Merleau‐ Ponty’s philosophy develops and his view changes from “existential” to “ontological”, the relation between Freud and Merleau‐Ponty changes accordingly, until the acknowledgment of the unconscious as a prediction of the “chair”.

  3. L'organisation de la formation agricole au benin : quels nouveaux ...

    African Journals Online (AJOL)

    Ingénierie des Dispositifs de Formation (DIF). Des investigations et analyses, il ressort que les formations offertes aux ruraux sont compatibles avec leurs besoins en formation mais l'élaboration de ces programmes est caractérisée par une forte ...

  4. Quels rapports entre tournesols, santé publique et territoires ?

    Directory of Open Access Journals (Sweden)

    Sausse Christophe

    2011-11-01

    Full Text Available The ragweed (Ambrosia artemisiifolia L. is usually known by farmers as a detrimental weed in spring crops, especially sunflower. But it is also known more generally as a public health issue due to its allergenic pollen. The fight against ragweed implies new methods out of the scope of those usually used by agronomists. It does not concern only the cultivated field but the whole territory, not only the farmers but a group of actors not always sharing the same point of view. In order to deal with this complex situation, we built a monitoring dashboard and tested it in the context of a small territory near Lyon (France. This tool allowed the local decision makers to be informed about the management practices, the measures implemented, and their efficiency. The assessments made in 2005 and 2007 usefully highlighted some critical points, such as the management of inter cropping periods on agricultural areas. This monitoring methodology faces some practical problems and still needs to be improved. However, it presents several advantages : the adaptation to local conditions can complement or provide an alternative to approaches based only on regulation. The lessons learned at the local level in the context of this pilot operation can also lead to a global improvement of ragweed control methods.

  5. Which future for the nuclear counter-proliferation?; Quel avenir pour la contre-proliferation nucleaire?

    Energy Technology Data Exchange (ETDEWEB)

    Duval, M

    2004-10-01

    After a recall of the permanent data about proliferation and of the safeguards implemented by the international community, the author demonstrates that proliferation has moved towards Asia where a real 'black market' has been created. Then he analyzes the consequences of this change on the future of nuclear deterrent. Finally, he expresses his nostalgia in front of this drift and worries about the future uselessness of the means devoted to this 'pacifying' strategy. (J.S.)

  6. LA CHUTE DES PRIX DE PETROLE : QUELS IMPACTS POUR L’ECONOMIE TUNISIENNE ?

    OpenAIRE

    Dhaoui, Elwardi

    2015-01-01

    Oil prices have fallen by about half since September 2014. The Organization of Petroleum Exporting Countries (OPEC) decided not to reduce production. The euro zone, China, Japan and Russia recorded slower rates of economic growth than expected. All combine to keep a sharp decline of oil prices which can be persistent. This new situation has profoundly changed the economic environment of the country. The impact will vary depending on the countries if they are exporters or importers of oil. For...

  7. Recherche sur le paranormal et croyances irrationnelles: quel est le lien?

    Directory of Open Access Journals (Sweden)

    Marie-Catherine Mousseau

    2005-06-01

    Full Text Available A la fin du 19ième siècle, les phénomènes paranormaux étaient couramment étudiés et débattus par les scientifiques les plus renommés (l'astronome Camille Flammarion, les physiciens William Crook et Oliver Lodge, les prix Nobel Charles Richet, Pierre et Marie Curie, .... Les débats étaient intenses et de haut niveau. Leurs travaux étaient généralement publiés dans des journaux prestigieux. Ce champ d'étude était appelé 'métapsychique'. Aujourd'hui, les questions qu'ils avaient soulevées sont complètement ignorées par la communauté scientifique. Ses représentants prétendent que le débat est clos et le considèrent démodé et ridicule. C'est devenu une sorte de 'tabou', 'un des plus puissants interdits des temps modernes'.

  8. Nuclear or radiology: which term to use?; Nucleaire ou radiologique: quel terme utiliser?

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    This document brings information and definition to help the public in the distinction between the two terms: nuclear and radiologic. What means the words nuclear and radiologic in the physics and common languages? In which situation an accidental or malevolent event can be called nuclear or radiologic? By which technic and for which use is concerned the radiology? It concludes by recommendation for the choice of one or the other term. (A.L.B.)

  9. OGM Diffusion des OGM et impact pour les agriculteurs : quels sont les liens ?

    Directory of Open Access Journals (Sweden)

    Lemarie Stéphane

    2001-05-01

    Full Text Available Les OGM actuellement sur le marché présentent des innovations sur des fonctions de protection des plantes. Selon les problèmes de protection des plantes, les gains des agriculteurs liés à l’adoption des OGM sont très variables. Cette hétérogénéité pose d’importants problèmes méthodologiques pour pouvoir estimer correctement la distribution des gains pour l’ensemble des agriculteurs. Une synthèse de plusieurs études américaines est réalisée ici et met bien en évidence la diversité des méthodes utilisées, chacune d’elles présentant ses avantages et ses limites. Globalement, si la diffusion des OGM est un fait indéniable, les études ne permettent pas de tirer des conclusions aussi nettes quant à l’impact des OGM pour tous les agriculteurs qui adoptent ces produits, et cela en particulier pour le soja. Cette absence de conclusion s’explique en grande partie par la difficulté à mesurer certains facteurs qui influencent le comportement d’adoption, comme par exemple la simplification de la conduite des cultures. En contrepartie, il faut noter que les études présentées ici ne prennent pas en compte un certain nombre d’effets indirects qui peuvent faire diminuer les gains des agriculteurs.

  10. Production. Which price for photovoltaic?; Production - le photovoltaique, a quel prix

    Energy Technology Data Exchange (ETDEWEB)

    Dupin, L.

    2011-02-15

    As the French government decided to reduce its financial support to photovoltaic energy, a first article identifies and comments the issues to be addressed to have a competitive French photovoltaic industry: to bet on second generation arrays (thin layer arrays), to have higher yearly objectives in terms of installed power (800 MW or 1 GW instead of 500 MW, in order to create a reference market), to redefine the financing and the electricity purchase scheme, to promote self consumption, to support exportation. The second article presents the first French photovoltaic test and certification centre, located near Chambery, where solar arrays are inspected and where their ageing is simulated through thermal fatigue and impact testing

  11. Gestion de classe dans l'enseignement secondaire au Benin: quels ...

    African Journals Online (AJOL)

    La gestion de classe (GC) constitue la préoccupation majeure des enseignants débutants ainsi que leur principale source de difficultés. Le but de cette étude est triple à savoir l'exploration des perceptions des enseignants débutants relativement à la GC, la description des problèmes rencontrés par ces derniers au cours ...

  12. La formation à la recherche en éducation au Vietnam: Quels défis ?

    Directory of Open Access Journals (Sweden)

    TRAN Thanh Ai

    2016-12-01

    Full Text Available La place très modeste des universités du Vietnam dans les classements mondiaux traduit le sous-développement scientifique de ce pays. Particulièrement en sciences de l’éducation, la situation est très décevante: de 1996 à 2010, seulement 39 articles sont publiés dans les revues internationales, mais on a formé des centaines de titulaires de master et de doctorat. Se pose donc la question de la qualité de la formation des jeunes chercheurs. Dans cet article, nous présentons le résultat d’un examen exploratoire mené sur plus de 600 titres des mémoires de master en sciences de l’éducation soutenus dans les universités vietnamiennes, et les premières esquisses sur les causes du sous-développement de la recherche en éducation.

  13. Quel universalisme des droits de l'Homme des droits de l'Homme ?

    OpenAIRE

    Delruelle, Edouard

    2014-01-01

    Le risque est que les droits de l’homme deviennent une forme de religion qui nous rassemble, comme s’ils étaient le sanctuaire d’une morale dont nous serions dépositaires, et que nous aurions à célébrer et à préserver. Peer reviewed

  14. La Mycorhize a arbuscules : quels benefices pour I'homme et son ...

    African Journals Online (AJOL)

    la production vegetale mais aussi pour une gestion et une remediation des sols degrades respectueuses de la .... phytoremediation des sols pollues. Les ... mecanisme central dans la regulation de ..... Soil Science Society of America Journal,.

  15. DOSES DE NÍQUEL EM FEIJÃO CAUPI CULTIVADO EM DOIS SOLOS

    Directory of Open Access Journals (Sweden)

    MARCELA CAMPANHARO

    2013-01-01

    Full Text Available Ni was the last nutrient characterized like essenti al for plants. Its essentiality is due to participa - tion as constituent of urease enzyme, which makes i t extremely important for the metabolism of N. Thus , the objective of this study was to investigate the grow th, content and accumulation of urea and nutrients in cowpea bean plants ( Vigna unguiculata (L. Walp. ‘IPA 206’ according to nickel rate and two soil types. The experi- ment was carried out in a greenhouse at Universidad e Estadual do Norte Fluminense Darcy Ribeiro, using a 5 x 2 factorial scheme in a randomized block design wit h four replications. Treatments consisted of foliar applica- tions of five nickel concentrations (0, 20, 40, 60 and 100 mg L -1 Ni in the form of NiCl 2 .6H 2 O and two soils, a Typic Quartzipsamment and a Tb dystrophic Red-Yello w Ultisol. Ni rates promoted Ni toxicity symptoms j ust on young leaves of bean. These symptoms were charac terized by small reddish spots that have not progre ssed during the time and did not influence on the plants development. The foliar application of Ni increase d levels of this micronutrient in stems, mature leaves, youn g leaves and pods of cowpea bean, indicating high m obility of this micronutrient in the plant, but did not alt er the urea contents, indicating no effect on the a ctivity of urease enzyme. The dry mass of the shoots and the c ontent of others nutrients were not affected by fol iar appli- cation of Ni. Plants grown in Ultisol showed higher growth and higher content of urea and Cu in mature leaves; K and B in mature leaves, young leaves and twigs an d Zn in mature leaves and stem.

  16. Electricity 2030 - Which choices for France?; Electricite 2030 - Quels choix pour la France?

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2011-11-15

    After having outlined the French leadership in Europe in the struggle against climate change, and the impact of the Fukushima accident on political choices, this report proposes an assessment of the evolution of electricity consumption in France by 2030, discusses three possible scenarios for electricity production and their consequences for the grid, compares these scenarios in terms of carbon dioxide, of investments, of impact on prices. Thirty key points are identified. They related to the electric energy mix and its relationship with the environment, with electricity tariff for consumers, with electricity uses, with investment financing, or with the balance of payments, to the relationship between the electric system and renewable energies, to European interconnections

  17. Spotify quel avenir pour le géant de la musique en streaming ?

    CERN Document Server

    Bouillot, Charlotte; Cadiat, Anne-Christine

    2015-01-01

    Un guide pratique et accessible pour tout savoir sur Spotify et ses créateurs passionnés Avec plus de 60 millions d'utilisateurs actifs à travers le monde en fin d'année 2014, Spotify est de loin l'acteur incontournable de l'écoute de musique en streaming. Mais que sait-on réellement de l'entreprise et des moyens qu'elle met en œuvre pour proposer à l'auditeur ses morceaux préférés ? Quelles sont les clés de la réussite de cet acteur qui a révolutionné la manière de consommer la musique ? D'ailleurs, l'entreprise est-elle véritablement rentable ?  Ce livre vous aidera à :        Comprendre la

  18. Les baobabs de Madagascar : quel cadre régle- mentaire pour leur ...

    African Journals Online (AJOL)

    1 juin 2014 ... dont trois 'En Danger' sur la liste rouge de l'UICN et trois ... With lemurs, baobabs are the most emblematic species of. Madagascar internationally. .... (CDB 2010) stipulant que 'd'ici à 2020, l'extinction d'espèces menacées ...

  19. Pourquoi le francais et quel francais au Maroc? (Why French and Which French in Morocco?)

    Science.gov (United States)

    Akouaou, Ahmed

    1984-01-01

    The status of French in Morocco is ambiguous: it is neither an official language nor a foreign language, and it would benefit greatly from an official definition that would allow a variety of language conflicts to be resolved. (MSE)

  20. Chambre de soin intensif et schizophrénie: quels impacts ?

    OpenAIRE

    Claude, Anaïs; Rerat, Océane; Rota, Edith; Lambelet, Catherine

    2016-01-01

    La mesure d’isolement est utilisée lors de comportement hétéro-agressif, auto-agressif ou encore lors d’un état d’agitation. Cependant, à ce jour, l’aspect thérapeutique de la chambre de soins intensifs n’est pas un acquis. Selon Bardet Blochet (2009) « l’utilisation de l’isolement est souvent perçu comme une mesure punitive, un moyen de contrôle social où s’intensifient des sentiments déjà présents d’exclusion, de rejet ou d’abandon » (p.559). Les soins infirmiers sont vus comme des échanges...

  1. What does the future hold for OPEC?; Quel avenir pour l'OPEP?

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2011-07-01

    The Organization of Petroleum Exporting Countries (OPEC) celebrated its 50. anniversary in September 2010. For half a century now, the cartel has succeeded in playing a major role on the energy market, despite divisions and changes. But today, its future is threatened, primarily in consequence of emerging alternative energies that are likely to blossom in the years to come due to rising crude oil prices

  2. PET: which radionuclides can be used?; TEP: quels sont les radionucleides utilisables?

    Energy Technology Data Exchange (ETDEWEB)

    Pasqualini, R. [CEA Saclay, CIS bio international, Schering, 91 - Gif-sur-Yvette (France)

    2005-04-15

    Almost the totality of positron imaging procedures are performed with {sup 18}F, mainly after administration of {sup 18}F-FDG. The reason of this hegemonic role in TEP is not only due to the favourable nuclear properties of {sup 18}F (97% of positron yield, low energy positron, no parasitic gamma-ray) but also to the relatively simple manufacturing process (use of low energy cyclotron, high irradiation yield). Only the short value of {sup 18}F half-life and the relatively poor labelling chemistry might be considered a disadvantage to a wider use of this radionuclide. The success of {sup 18}F has stimulated the search for new positron emitters, leading to a list of a large number of potential candidates. However, it is known that the pharmaceutical development leading to the approval of a new radioactive tracer is a long and costly process. Therefore, it is necessary to adopt selecting criteria able to identify the best candidate undergoing the pharmaceutical development with potentiality of success. The selection criteria used in this presentation are based on both the impact of nuclear properties on image quality and dosimetry and on the data related to the manufacturing process (irradiation and purification yields, half-life value etc). These criteria have been applied to the most frequently cited positron emitters, namely {sup 64}Cu, {sup 68}Ga, {sup 72}As, {sup 76}Br, {sup 86}Y, and {sup 124}I. {sup 82}Rb, a radionuclide currently approved in US has also been included in this analysis. Amongst the above radionuclides, only {sup 64}Cu, {sup 68}Ga, {sup 82}Rb and, to a less extent, {sup 124}I can be considered acceptable candidates for an industrial development. (author)

  3. Which future for nuclear counter-proliferation?; Quel avenir pour la contre-proliferation nucleaire?

    Energy Technology Data Exchange (ETDEWEB)

    Duval, M.

    2010-07-15

    Dealing with the case of nuclear weapons possessed by nuclear states (but not eventually by terrorists), the author first identifies the constants of counter-proliferation: it is linked to interest conflicts between those who try to preserve their monopoly and those who try to acquire a new weapon either because of a threat or for reasons of regional prestige, the evolution from use to deterrence, the appearance of new actors after the USA and Russia, the role of nuclear tactical weapons, and the future of Russian weapons and know-how. He presents the international counter-proliferation context: the Non Proliferation Treaty (NPT), the IAEA and its controls, the Nuclear Supplier Group (NSG), the nuclear-free zones, the Comprehensive Test Ban Treaty (CTBT), the Missile Technology Control Regime (MTCR). He describes how and why proliferation occurs: uranium enrichment and plutonium technology, political reasons in different parts of the world. Then, he gives an overview of the proliferation status by commenting the cases of Israel, Iraq, India, Pakistan, North Korea, and Iran. He discusses the future of proliferation (involved countries, existence of a nuclear black market) and of counter-proliferation as far as Middle-East and North Korea are concerned. He tries finally to anticipate the consequences for nuclear deterrence strategy, and more particularly for Europe and France

  4. The domestic wastes incinerators; Les incinerateurs d'ordures menegares: quels risques? quelles politiques?

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-10-01

    This document presents the opinion of the Committee of Prevention and Precaution (CPP), on the domestic wastes incinerators, in the framework of the global wastes policy. The seven chapters detail and bring advices on the following topics: the elements which are going in and out of the incinerators, the technical processes, the occupational activities and the risks bound to the incinerators use, the transfer modes towards the different environmental areas, the exposure estimation, the risks of people living near the domestic wastes incinerators compared to the other concerning a cancer development, the legislation concerning the domestic wastes and the social acceptability of the incinerators. (A.L.B.)

  5. Participation et construction de barrage à Alqueva (Portugal. Quelles méthodes, quels moyens ?

    Directory of Open Access Journals (Sweden)

    Fabienne Wateau

    2004-12-01

    Full Text Available Ce n’est pas la participation qui est en cause, mais les façons inadaptées ou faussement démocratiques et légitimatrices de la présenter. Quelques-unes de ces situations, dans le contexte de la construction d’un grand barrage au Portugal, sont explicitées dans cet article.

  6. Bâle 3 : Quels impacts sur le financement des pays émergents ?

    OpenAIRE

    Figuet, Jean-Marc; Humblot, Thomas; Lahet, Delphine

    2013-01-01

    La persistance de crises bancaires démontre l'incapacité des établissements de crédit à s'autoréguler. De ce fait, le Comité de Bâle étend largement le périmètre de la nouvelle règlementation prudentielle. Sur la base de la littérature sur les déterminants des flux de capitaux transfrontières et d'un GMM système, cet article analyse l'impact potentiel de l'accord Bâle 3 sur les flux de capitaux bancaires provenant des banques de 16 pays industrialisés à destination d'un panel de 30 pays émerg...

  7. Les baobabs de Madagascar : Quel cadre réglementaire pour leur ...

    African Journals Online (AJOL)

    Abstract. Avec les lémuriens, les baobabs sont certainement reconnus dans le monde comme l'un des groupes les plus emblématiques de Madagascar. La Grande Île abrite six espèces endémiques dont trois 'En Danger' sur la liste rouge de l'UICN et trois 'Quasi - menacées'. Cet article se propose de passer en revue les ...

  8. Aires culturelles et pluridisciplinarité : quel enjeu pour les sciences sociales ?

    Directory of Open Access Journals (Sweden)

    François Siino

    2012-01-01

    Full Text Available En 1996, dans un souci de “resserrement disciplinaire”, Pierre-Robert Baduel, alors directeur de la REMMM, proposait de distinguer deux séries, l’une consacrée à l’« Histoire », l’autre, sous le titre « Pouvoirs, Économie, Société », au monde contemporain. Succédant à Pierre-Robert Baduel à la direction de la revue, tout en conservant la rédaction en chef de la série Histoire, Sylvie Denoix a préservé cette distinction. Aujourd’hui, après une période de tâtonnements, la série anciennement int...

  9. CARACTERISATIONS ENERGETIQUE ET ENVIRONNEMENTALE DE LA BIOMETHANISATION PILOTE APPLIQUEE AUX DEJECTIONS ANIMALES

    Directory of Open Access Journals (Sweden)

    Y. M’SADAK

    2012-12-01

    Full Text Available This study interested in monitoring energy (quantitative and qualitative and environmental performances at various pilot digesters of animal biomass.Main results are:The combined effect of the diet and the substrate on quantitative experimental productivity of gas is in favor of poultry digesters continuously fed. The biogas produced has better potential especially in industry. The environmental evaluation virtually shows a certain interest on the depollution for industrial digester.

  10. Cogeneration. Energy efficiency - Micro-cogeneration; La Cogeneration. Efficacite Energetique - Micro-cogeneration

    Energy Technology Data Exchange (ETDEWEB)

    Boudellal, M.

    2010-07-01

    Depletion of natural resources and of non-renewable energy sources, pollution, greenhouse effect, increasing energy needs: energy efficiency is a major topic implying a better use of the available primary energies. In front of these challenges, cogeneration - i.e. the joint production of electricity and heat, and, at a local or individual scale, micro-cogeneration - can appear as interesting alternatives. This book presents in a detailed manner: the present day and future energy stakes; the different types of micro-cogeneration units (internal combustion engines, Stirling engine, fuel cell..), and the available models or the models at the design stage; the different usable fuels (natural gas, wood, biogas..); the optimization rules of a facility; the costs and amortizations; and some examples of facilities. (J.S.)

  11. Law project relative to the energy markets; Projet de loi relatif aux marches energetiques

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-09-25

    This document presents the law project relative to the energy markets. It aims to open the french gas market to the competition and defines the gas utilities obligations. The first part presents the main topics of the law: the natural gas distribution access, the natural gas sector regulation, the gas utilities, the natural gas transport and distribution, the underground storage, the control and penalties. The second part details the commission works concerning this law project. (A.L.B.)

  12. Energies and raw materials. The energy situation; Energies et matieres premieres. Conjoncture energetique

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-10-01

    Statistics are given on the energy and raw materials (coal, oil, etc.) production and consumption levels in France in October 1997: primary energy total consumption has increased (mobile year) of 0.8%, at the same rate since 3 years. Interior demand has varied depending on the energy: strong decrease for coal (- 8.1%), slight increase for petroleum products (+ 1.3%), slowing down increase for gas (+ 2.1%) and moderate increase for electricity (+ 1.4%). An increase in the dollar exchange rate and a high level of oil and gas imports have induced a high energy cost level with + 22% on one year, reaching 87.8 billions Francs, to be compared to 72.0 in October 1996

  13. Energies and raw materials. The energy situation; Energies et matieres premieres. Conjoncture energetique

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-11-01

    Statistics are given on the energy and raw materials (coal, oil, etc.) production and consumption levels in France in November 1997: primary energy total consumption has increased (mobile year) of 0.6%, at a slightly inferior rate than the rate since 3 years. Interior demand has varied depending on the energy: strong decrease for coal (- 9.3%), slight increase for petroleum products (+ 1.2%), markedly slowing down increase for gas (+ 1.4%) and moderate increase for electricity (+ 1.3%). An increase in the dollar exchange rate and a high level of oil and gas imports have induced a maintained high energy cost level with + 14% on one year, reaching 86.8 billions Francs, to be compared to 76.1 in November 1996

  14. Energies and raw materials. The energy situation; Energies et matieres premieres. Conjoncture energetique

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-09-01

    Statistics are given on the energy and raw materials (coal, oil, etc.) production and consumption levels in France in September 1997: primary energy total consumption has increased (mobile year) of 1.1%, at the same rate since 3 years. Interior demand has varied depending on the energy: strong decrease for coal (- 5.9%), slight increase for petroleum products (+ 0.8%), strong increase for gas (+ 3.2%) and moderate increase for electricity (+ 1.7%). An increase in the dollar exchange rate and a high level of oil and gas imports have induced a record energy cost level with + 30% on one year, reaching 89.2 billions Francs, to be compared to 68.5 in September 1996

  15. US oil policy and energy security; Politique petroliere americaine et securite energetique

    Energy Technology Data Exchange (ETDEWEB)

    Noel, P

    2002-05-15

    Although the energy dependence reached its historical maximum and will continue to increase for the next 20 years, the USA keep their oil policy. For the economist this policy is reasonable because of the poor room for the US imports reduction costs. To explain these conclusions the author discusses on the following topics: the links between the oil dependence and the energy security, the oil policy after Reagan, the oil policy evolution - or no evolution - facing the increasing dependency and the Cheney report. (A.L.B.)

  16. The regional control of the canadian energy production; Le contraste provincial de la production energetique canadienne

    Energy Technology Data Exchange (ETDEWEB)

    Petitlaurent, S.; Sarrazin, J

    2004-12-01

    This document provides information and presents data on the energy situation in many regions of Canada. The first part deals with the petroleum and the bitumen shales of Alberta (reserves, exploitation and production, environmental impacts), the second part discusses with the hydroelectricity choice of Quebec and the 2004 crisis. The nuclear situation of Ontario is presented in the third part (nuclear park, programs, uranium reserves, research and development on Candu reactors), while the fourth part deals with the renewable energies (wind power and biomass). The canadian situation facing the Kyoto protocol is discussed in the last part. (A.L.B.)

  17. Energy research 2002 - Overview; Energie-Forschung 2002 / Recherche energetique 2002

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    This publication issued by the Swiss Federal Office of Energy presents an overview of advances made in energy research in Switzerland in 2002. In the report, the heads of various programmes present projects and summarise the results of research in four main areas: Efficient use of energy, renewable energy sources, nuclear energy and energy policy fundamentals. Energy-efficiency is illustrated by examples from the areas of building, traffic, electricity, ambient heat and combined heat and power, fuel cells and combustion. In the renewable energy area, projects concerning energy storage, photovoltaics, solar chemistry and hydrogen, biomass, geothermal energy, wind energy and small-scale hydro are presented. Nuclear safety and controlled thermonuclear fusion are discussed.

  18. Provisional energy balance of France for 2002; Bilan energetique provisoire de la France pour 2002

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    A provisional energy accounting in France for 2002 is presented. Statistical data and diagrams are provided to detail and discuss the economical and energy context, the primary energy consumption, the national production and the energy dependence, the primary energy consumption for each energy source, the sectorial analysis of the energy consumption and the carbon dioxide emissions. (A.L.B.)

  19. Provisional energy situation for the year 2001; Bilan energetique provisoire de l'annee 2001

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    This provisory energy balance, published by the Direction of the Energy and the raw materials, presents the primary energy consumption and production for each energy sources and the carbon dioxide emissions, for the year 2001. The corrected primary energy consumption remains constant as the real primary energy consumption increases of 1,3 %. The evaluation provides also a sectoral analysis of the energy consumption illustrated by data tables. (A.L.B.)

  20. The energy turn of the year 2000; Le tournant energetique de l'an 2000

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    The new laws on the energies market are going to change the commercial sector of the electric power market in France. The colloquium in two parts ( the 25 and 26 january 2000), constitutes a reflection on the future of this new market. The first part provides papers on examples of european market in Great Britain, Germany and Scandinavia and presents the strategies of marketers. The energy buyers of tomorrow will have to take appropriate risks to keep their competitiveness. The second part provides papers on the place of the cogeneration in this new market. The positive example of the United States and the negative example of the Germany are analyzed. giving answers to economic, legal, financial and technical problems. (A.L.B.)

  1. US oil dependency and energy security; Dependance petroliere et securite energetique americaine

    Energy Technology Data Exchange (ETDEWEB)

    Noel, P [Institut francais des Relations Internationals, 75 - Paris (France); [Universite Pierre Mendes-France-IEPE-CNRS, 38 - Grenoble (France)

    2002-07-01

    The three papers of this document were written in the framework of a seminar organized the 30 may 2002 by the IFRI in the framework of its program Energy and Climatic Change. The first presentation deals with the american oil policy since 1980 (relation between the oil dependence and the energy security, the Reagan oil policy, the new oil policy facing the increase of the dependence). The second one deals with the US energy security (oil security, domestic energy security, policy implications). The last presentation is devoted to the US oil dependence in a global context and the problems and policies of international energy security. (A.L.B.)

  2. Energy Research in Switzerland in 2001; Energieforschung 2001. Ueberblicksberichte/Recherche energetique 2001. Rapports de synthese

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-04-15

    This comprehensive annual report for the Swiss Federal Office of Energy (SFOE) contains the overview-reports that were made by the heads of the following Swiss energy research programmes for the year 2000: Efficient use of energy in buildings, traffic, vehicles and accumulators, electricity, ambient heat and combined heat and power generation, fuel cells, combustion technologies, solar heat and storage, photovoltaics, solar chemistry and hydrogen, biomass, geothermal energy, wind energy, small hydropower, nuclear safety and nuclear waste disposal, regulatory nuclear safety research, nuclear fusion and energy economy basics. In the following, just a selection of the large number of topics covered are mentioned. Under the topic of efficient energy use in buildings, an emphasis was placed on highly efficient insulation systems, so-called passive dwellings, environmental issues, the use of solar energy, insulation using grass and hemp fibre as well as a market analysis for the IEA sustainable housing project. In the solar area, experience gained with solar buildings, air-collectors and the optimisation of solar energy and daylight use are noted. In the building technologies area, highly glazed buildings were also looked at, as were airing and ventilation topics. Various instruments in the building technical services area are noted. A number of pilot and demonstration projects are listed. Traffic topics reported on include a review of statistics on mobility, lightweight body technologies, drive systems and on-board electrification, fuel cell drive technologies, supercaps and accumulators, as well as various pilot and demonstration projects. Electrical topics include distribution and tariffs, high-temperature superconductors, energy efficiency in computer applications, drives, electrical machines and a heat-pump based tumbler. In the ambient heat and heat-pump area, projects concerning refurbishment, two-stage systems, small ammonia heat-pumps, carbon dioxide refrigerants and system optimisation are reported on as are combined heat and power units. Batch processes are discussed. Various pilot and demonstration projects are reported on, as is work done in the fuel-cell area. As far as combustion technology is concerned, work done is noted, including turbulent combustion, low-temperature, high-pressure combustion, optical measurement methods and numerical simulation of combustion processes. Pilot and demonstration projects are noted. In the solar energy area, the accreditation of testing facilities and the ageing of collectors are discussed as are urban installations and solar kits. Also, work done on high-temperature solar energy, its storage and electricity production are noted. In the photovoltaics section, the wide range of Swiss work in this area is noted. Work done on roll-to-roll PV technology, compound and dye-based cells is reported on as is work done in the areas of building integration and electrical system technology. Various studies and projects are noted. Work done in co-operation with the IEA and the IEC is noted. In the solar chemistry area, work done on magnetrons, low and medium temperature process heat, high-temperature production of chemical energy carriers, solar fuels and photo-chemical processes are reported on, as well as the production, storage and use of hydrogen. The report on the biomass program takes a look at wood pellet production, system optimisation and particle emissions, the digestion of biogenic wastes and bio fuels. Some of the work listed in the geothermal area includes the heat potential of the drainage water from the new St.-Gothard and Loetschberg railway tunnels, long-term behaviour of geothermal probes and surface-near and deep geothermal power. Results obtained in various projects are discussed. Wind topics reported on include planning aids, location assessment and a wind data bank for Switzerland. Small hydropower issues reported on include support for preliminary studies and environmental certification. A few pilot and demonstration projects are noted. Nuclear energy topics include the STARS accident scenario project, human reliability, light-water reactors as well as research on serious accidents, waste disposal and future reactor concepts. A further report deals with regulatory safety research in the nuclear area and man-machine interaction as well as further safety matters. Nuclear fusion is reviewed at an international level and work done in Switzerland is reviewed. Finally, the report on the fundamentals of Swiss energy economics reports on Swiss cantonal energy-related measures and energy perspectives as well as perspectives for hydropower and electricity and gas import.

  3. How can we ensure the energy transition? Comment assurer la transition energetique?

    Energy Technology Data Exchange (ETDEWEB)

    Rojey, Alexandre

    2007-07-01

    With a continuously growing energy demand, the present energy model is clearly unsustainable due to the decline of fossil fuel resources and the risks of climate change A transition towards a sustainable model is therefore needed. However, there are no immediate alternatives leading to a sharp reduction in the use of fossil fuels, which are expected to maintain a major role for many years. The energy transition will therefore require a long time period The risks of climate change will require urgent measures and the 'carbon transition' has to be achieved more rapidly than the energy transition itself. A whole set of solutions will be needed in the technical but also economic and regulatory areas, for achieving a successful transition: energy conservation, diversification of energy . sources, reduction of the carbon content of the energy mix, CO{sub 2}, capture and storage. Hybrid options will be favoured. The paper describes the main features of the upcoming transition and the actions which are required. (auth)

  4. Which sustainable energy policy in France?; Quelle politique energetique durable en France?

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    Concurrently to the National Debate on the energies, a real debate has been proposed by seven associations of the environment protection and improvement. This debate, international, wonders on the energy choices in France. Presentations of the interveners and working documents are provided on the following topics: energy choices for the economic development, renewable energies, the possibilities and the development of the solar energy in France, the economic interest of the cogeneration, quick overview of the wind energy in France, energy production data, the transport and the greenhouse effect, the sustainable development and the energy policy and the local governments. (A.L.B.)

  5. Energy efficiency performance contracts in the school environment; Contrats de performance energetique dans le milieu scolaire

    Energy Technology Data Exchange (ETDEWEB)

    Drouin, J. [Quebec Ministere de l' Education, Ste-Foy, PQ (Canada)

    1999-12-01

    An overview of new regulations concerning the awarding of energy performance contracts by school boards in the province of Quebec is provided. The article deals with buildings belonging to boards of education that are wholly or primarily utilised for educational purposes. It provides an inventory of such buildings and statistical information about about energy consumption and energy-related costs of educational facilities during the school years 1996/1997 and 1997/1998. Regarding the new regulations, the principal change appears to be that school boards are required to award construction or building services contracts estimated to cost between $50,000 and $100,000 either by public requests for tenders, or by invitation; construction or building services contracts whose cost exceeds $100,000 must be awarded by public tender. In effect, to meet the energy efficiency criteria specified in the new regulations, school boards are obliged to call for bids on any project that contribute to the energy efficiency of school buildings whose cost is estimated to exceed $50,000. The objective of the new regulation is to encourage the consideration of energy efficiency standards by school boards, and by potential contractors. The regulations also prescribe the method of requesting bids and specifies the energy efficiency criteria bidders must meet in order to be eligible.

  6. Energy efficiency : an economic stimulator; Efficacite energetique : un moteur economique vert

    Energy Technology Data Exchange (ETDEWEB)

    Contant, A.

    2009-04-01

    In an effort to meet Quebec's energy requirements projected for 2015, Hydro-Quebec along with its partners and clients will invest $3 billion in energy efficiency. Quebec's Energy Efficiency Agency, Canada's Office of Energy Efficiency and the Federation of Canadian Municipalities (FCM) green municipal fund have all contributed to energy efficiency projects to stimulate the economy. These measures are expected to create nearly 4000 jobs in Quebec for electricians, heating contractors, plumbers and building professionals. This investment will also benefit the suppliers and distributors of electrical materials as well as the forestry industry, cement manufacturers, and specialized engineers. Since the benefits of energy efficiency upgrades are already well established, projects can get underway without further studies. The proposed energy efficiency projects can be applied anywhere in the province of Quebec and are not intended for any specific region. To name a few, the projects have included energy upgrades in an arena in Riviere du Loup, the Montreal Health Institute's head office building, and traffic light upgrades in Levis, Quebec. The article noted that energy efficiency upgrades made in the office buildings of Alcan, IBM, Molson and Bombardier have all resulted in at least a 5 per cent reduction in electricity use. All these changes have been good for the environment, even though Quebec's electricity is generated almost entirely from renewable energy sources. 6 figs.

  7. An energy strategy for France; Une strategie energetique pour la France

    Energy Technology Data Exchange (ETDEWEB)

    Fontaine, N.

    2003-10-01

    The present report endeavors tpo make a synthesis of the debate about energy to deduce numerous measures devoted to define the French energy strategy for the short, middle and long term. Two parts are studied in this report. In the first one, the landscape of energy is set, the market is tackled, the energy supply and demand are object of controversy. In the second part, the objective for an energy policy are summarized, elements for the control of energy demand are studied, the energy supply is equally tackled. (N.C.)

  8. Global energy outlooks. State of the art; Perspectives energetiques globales. Etat des lieux

    Energy Technology Data Exchange (ETDEWEB)

    Bobin, J.L.; Nifenecker, H.; Stephan, C

    1999-07-01

    Since two year, the SFP (French Society of Physics) began a debate on the Energy of the 21 century, by the way of regional conferences. This debate allowed the publication of synthesis documents about elements discussed during these conference. This document presents the foreseeable evolution of the energy demand, taking into account the reserves; the selected production forms consequences in terms of nuisances; the part of the nuclear energy and the renewable energies. The costs are also discussed and many statistical data are provided. (A.L.B.)

  9. 2004 energy accounting in France; Bilan energetique de la France en 2004

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    This economic analysis presents the energy accounting of the France in 2004 which shows a little renewal of the consumption and a better energy efficiency. It provides data on the energy consumption and production for the different energy types and for the different activity sectors, to illustrate the analysis. (A.L.B.)

  10. The energy turn of the year 2000; Le tournant energetique de l'an 2000

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    The new laws on the energies market are going to change the commercial sector of the electric power market in France. The colloquium in two parts ( the 25 and 26 january 2000), constitutes a reflection on the future of this new market. The first part provides papers on examples of european market in Great Britain, Germany and Scandinavia and presents the strategies of marketers. The energy buyers of tomorrow will have to take appropriate risks to keep their competitiveness. The second part provides papers on the place of the cogeneration in this new market. The positive example of the United States and the negative example of the Germany are analyzed. giving answers to economic, legal, financial and technical problems. (A.L.B.)

  11. Energy Research in Switzerland in 2009; Energieforschung 2009. Ueberblicksberichte/Recherche energetique 2009. Rapports de synthese

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2010-06-15

    This very comprehensive annual report for the Swiss Federal Office of Energy (SFOE) contains the overview-reports for the year 2009 that were made by the heads of the following program-groups covered by Swiss energy research: Efficient energy use, renewable energy, nuclear energy and the energy-economy-society area. Under the comprehensive topic of efficient energy use, building concepts compatible with the '2000-Watt Society', Minergie-P 'passive' housing, calculation and dynamic simulation tools, sustainable building projects and developments in the building insulation area are mentioned along with refurbishment topics, the use of solar-thermal energy and electrical efficiency. In the traffic area, lightweight vehicles, drive systems - including hybrid systems - are reported on, as are electric scooters, vehicle-to-grid power storage and inter-modal transport systems. In the accumulators area, various new systems are looked at. With respect to electrical technology, work on electricity storage, conversion and high-temperature superconductors are reported on. Alternative power generation and storage systems are reviewed. Developments in the information and communications area are noted. 'Smart metering', standby losses and lift drives are reported on, as are household appliances and lighting systems. In the electricity area, the interaction of electricity grid and communication systems as well as future energy networks are reported on. In the heat pump and combined heat and power generation area, improving thermodynamic processes, integral system optimisation and high-efficiency systems as well as environment-friendly refrigerants and magnetic heat-pumps are discussed. Combustion topics reviewed include how research basics can be improved, numerical simulation methods, large diesel engines, catalytic reactions, the use of biogenic fuels and exhaust gas treatment. The 'Power Station 2020' and carbon capture and storage program reports on combined heat and power stations and efficient gas turbines. Increasing efficiency and the use of CO{sub 2}-neutral fuels are discussed, as is CO{sub 2} sequestration. Hydrogen production and storage and associated safety aspects are looked at, as are developments in the fuel cell and the industrial processes areas. Renewable energy topics noted include solar collectors and the storage of solar heat, building integration, thin-film photovoltaics, dye-based and organic solar cells and electrical system technology. High-temperature industrial applications are noted. Biomass and wood-fuel topics are covered, including particle emissions, eco-balances and the anaerobic digestion of biomass. In the hydropower area, pump-storage schemes and the classification of streams and rivers are dealt with, as is the development of a diagonal-turbine. The uses of shallow geothermal energy and deep-heat mining are reported on, as is three-dimensional modelling. Research and component development in the wind-energy area and the social acceptance and modelling of such installations are presented. In the nuclear energy area, work done at various laboratories and human factors in safety issues are covered, as are waste disposal and future reactor concepts. A new 'hot-laboratory' is introduced and nuclear fusion research work is noted. Within the framework of the 'Energy-Economy-Society' programme, building renovation, traffic and mobility topics, energy efficiency and rebound-effects, energy politics, technology transfer and innovation, decentralised power production and the risks of nuclear energy are dealt with.

  12. Supplying safety and energy independence; Securite d'approvisionnement et independance energetique

    Energy Technology Data Exchange (ETDEWEB)

    Maillard, D. [Ministere de l' Economie, des Finances et de l' Industrie, 75 - Paris (France). Direction Generale de L' Energie et des Matieres Premieres

    2001-03-01

    The french Observatory of the Energy wonders about the energy independence notion. Many risks are possible: physical, economical, geo-political, social and ecological risks. Because those risks are numerous, the answers for a supplying safety are also numerous. In this context the energy policy is a difficult art which the public opinion needs to be more and more aware. (A.L.B.)

  13. Energy Research in Switzerland in 1999; Energieforschung 1999. Ueberblicksberichte/Recherche energetique 1999. Rapports de synthese

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-04-15

    This comprehensive annual report for the Swiss Federal Office of Energy (SFOE) contains the overview-reports that were made by the heads of the following Swiss energy research programmes for the year 1999: Efficient use of energy in buildings and hot-water systems, solar architecture, electricity, ambient heat and heat-pumps, solar energy, photovoltaics, biomass, geothermal energy, small hydropower, wind energy, solar chemistry and hydrogen, combustion technologies, heat storage, nuclear energy and nuclear safety, nuclear fusion, fuel cells, accumulators and traffic. In the following, just a selection of the large number of topics covered are mentioned. Under the topic of efficient energy use in buildings, an environmental optimisation tool and an eco-inventory are mentioned and work done on the use of grass-fibres for insulation is noted along with new developments in highly efficient insulation systems, refurbishment of windows, thermo-active building components, as well as ventilation and heating systems. The efficient use of energy in hot-water preparation is discussed in a further report. In the solar architecture area, the validation of simulation programs and the trial of refurbishment concepts making indirect use of solar energy for heating, lighting and power generation are covered. Electrical topics include distribution and islanding, flywheel energy storage, high-temperature superconductors, power consumption of personal computers and household electronics, drives and compressors as well as saving energy in railway coaches. In the ambient heat and heat-pump area, projects on the modelling of heat probes are noted, as are those concerning intermediate injection, small ammonia heat-pumps, optimisation of combined heat and power plants, low-temperature heating, commercial cooling and disposal of used refrigerants. In the solar energy area, further work on software aids for the calculation of solar gain and developments in coatings for solar collectors are commented on. Experience gained with various test installations is also noted. The photovoltaics section reports on work done on micro-morph and flexible solar cells, system technology and building integration and inverters as well as on various studies and projects. Work done in co-operation with the IEA and the IEC is noted. The biomass section reports on the dimensioning of wood-fired systems, particle filtering, gasification systems, burning of chicken droppings, tar, co-digesters and biofuels. Some of the projects listed in the geothermal area include Swiss geothermal statistics, geological aspects, combined use of hot spa waters and also deep heat mining. Small hydropower issues reported on include a public survey on small hydro, revitalisation projects and work done at the MhyLab facility on small turbines. Wind topics reported on include a potential study, information and training as well as the planning of wind park projects using various tools. In the solar chemistry area, work concerning process heat, chemical energy storage, small ammonia-heat-pumps, solar ovens and receivers, photo-chemical processes as well as the storage and transport of hydrogen are reported on. As far as combustion technology is concerned, work done at various Swiss institutions is noted, including low-temperature, high-pressure combustion, optical measurement methods and numerical simulation of combustion processes. In the energy storage area, long-term and short-term underground heat-storage systems and their modelling are discussed, as is heat storage in aquifers. Nuclear energy topics include the STARS accident scenario project, human reliability, light-water reactor contamination as well as component safety, accident management, waste disposal and future reactor concepts. A further report deals with regulatory safety research in the nuclear area, contamination control, meteorological factors as well as man-machine interaction and cellular radio-sensitivity. Nuclear fusion is reviewed at an international level and work done in Switzerland is looked at. The fuel cells and accumulators report takes a look at current work on natural gas and hydrogen-powered fuel cells with polymer and ceramic electrolytes. Work done on various types of accumulators and super-condensers is mentioned. Traffic topics reported on include lightweight body technologies, efficient drive systems, mobility behaviour, hybrid drive technologies, electric vehicle pricing and various pilot and demonstration projects.

  14. Energy Research in Switzerland in 1997; Energieforschung 1997. Ueberblicksberichte/Recherche energetique 1997. Rapports de synthese

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-15

    This comprehensive annual report for the Swiss Federal Office of Energy (SFOE) contains the overview-reports for the year 1997 that were made by the heads of the following Swiss energy research programmes: Research co-ordination, efficient use of energy in buildings, solar architecture, electricity, ambient heat and heat-pumps, solar energy, photovoltaics, biomass, geothermal energy, small hydropower, wind energy, solar chemistry and hydrogen, combustion technologies, heat storage, nuclear energy and nuclear safety, nuclear fusion, fuel cells and accumulators, traffic and the fundamentals of energy economics. In the following, just a few of the large number of topics covered are mentioned. Under the topic of efficient energy use in buildings, a new optimisation tool and a work done on highly-insulated walls are mentioned along with new developments in building technology and simulation. In the solar architecture area, both the direct and indirect use of solar energy for heating and lighting are covered. Electrical topics include efficient electricity use, drives, high-temperature superconductors, transport, energy management, power-electronics, EDP projects and saving energy in trains. In the ambient heat and heat-pump area, projects on the modelling and the regeneration of heat probes are noted, as are projects concerning refrigerants, combined heat and power technologies and Stirling engines. Work done in co-operation with the IEA Heat Pump Program is noted. In the solar energy area, software aids for the calculation of solar gain and the testing of solar collectors are commented on and experience gained with various installations is noted. The photovoltaics section reports on work done on solar cells, building integration and systems technology as well as various studies and projects. The report on the biomass program reports on pollution aspects of firing, project aids, small ready-to-use biogas installations, and motor fuels from biomass. Among the projects listed in the geothermal area, increasing the economic efficiency of drilling, life-expectancy of heat probes, use of aquifers, geological aspects and deep heat mining are noted. Small hydropower issues reported on include direct and indirect support for projects, public relations and the Internet. Wind topics reported on include measurement and documentation, information centres and various wind park projects. In the solar chemistry area work concerning process heat, chemical energy storage, photo-electric processes as well as the storage and transport of hydrogen are reported on. As far as combustion technology is concerned, work done at various Swiss institutions is noted, including optical measurement methods and numerical simulation. Also, pollutant reduction is commented on. In the energy storage area, long-term and short-term underground heat-storage systems and their modelling are discussed. Nuclear energy topics include probabilistic safety analysis, human reliability, stress-corrosion cracking and other corrosion effects as well as accident management, waste disposal and future reactor concepts. A further report deals with regulatory safety research in the nuclear area. Nuclear fusion is reviewed at an international level and work done in Switzerland is reviewed. The fuel cells and accumulators report takes a look at current work on natural gas and hydrogen-powered fuel cells with polymer and ceramic electrolytes and work done on various types of accumulators and super-condensers is mentioned. Traffic topics reported on include modular body technologies, drive systems, hybrid drive technologies, safety aspects and eco-balances. Experience gained in fleet trials is reviewed. Finally, the report on the fundamentals of Swiss energy economics reports on perspectives for energy consumption, cantonal energy policies, cost and economic viability of energy systems, solar energy and steering taxes and the opening of energy markets.

  15. Energetic approach for ductile tearing; Approche energetique de la dechirure ductile

    Energy Technology Data Exchange (ETDEWEB)

    Marie, St

    1999-07-01

    This study focuses on ductile crack initiation and propagation. It aims to propose an approach for the engineer allowing the prediction of the evolution of cracks in large scale components, from parameters determined on laboratory specimens. A crack initiation criterion, defining a J{sub i} tenacity related to crack tip blunting proposed in the literature is validated in the study. This criterion is shown to be transferable from laboratory specimens to structures. The literature review shows that an approach based on the dissipated energy in the fracture process during propagation offers an economical and simple solution to simulate large crack growth. A numerical method is proposed to estimate this fracture energy. The existence of an energy parameter G{sub fr} is shown, by simulating the propagation by the simultaneous release of several elements and by the use of the Rice integral with an original integration path. This parameter represents the needed energy for a unit crack extension and appears to be intrinsic to the material. A global energy statement allows to relate this parameter to a variation of the plastic part of J integral. It offers a second numerical method to simulate the propagation just from stationary numerical calculations, as well as the elaboration of a simplified method. This approach, using two parameters J{sub i} and G{sub fr}, intrinsic to the material and experimentally measurable on specimens, is validated on many tests such as crack pipes subjected to four points bending and cracked rings in compression. For example, this approach allows to model up to 90 mm ductile tearing in a pipe with a circumferential through-wall crack in ferritic steel, or to anticipate the evolution of a semi-elliptical crack in an aged austenitic ferritic steel plate subjected to bending. (author)

  16. Negawatt manifesto - Making energy transition a success; Manifeste Negawatt - Reussir la transition energetique

    Energy Technology Data Exchange (ETDEWEB)

    Salomon, Thierry; Jedliczka, Marc; Marignac, Yves; Hessel, Stephane; Lovins, Amory

    2012-01-19

    For ten years, the Negawatt association has taken a fresh look at our ways of consuming and producing energy. After the realisation of its 2011 scenario, the association has wished to complete this work with a reflexion full of ideas and operational measures and addressed to all citizens and to decision-makers. This manifesto describes with pedagogy and lucidity a possible and desirable path to get out of our energy and climate crises. Contents: 1 - Energy in crisis; 2 - Energy in its all forms; 3 - From the approach to the scenario: preparing the energy transition; 4 - Buildings and energy transition; 5 - Key-sectors of the transition: transports, industry and agriculture; 6 - Advent of renewable energies; 7 - From the nuclear twilight to the renewable dawn; 8 - Costs and benefits of the energy transition; 9 - The 'true value' of energy; 10 - From the status time to the action one. A series of 26 graphs summarizes the Negawatt approach. (J.S.)

  17. Municipalities and opening up of energy markets; Les municipalites et l'ouverture des marches energetiques

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    The opening of energy markets in Europe is modifying deeply the general framework of economic activity, modes of organisation and ways of thinking. The energy future in Europe is being determined under the influence of Community directives relating to electricity and to gas. It is also being moulded by national legislation, which is being progressively put into place in different countries of the European Union and in other European countries such as those of central Europe. These will affect the conditions under which policies for energy efficiency, for the development of renewable energy and for combating climate change are to be implemented. The liberalization of energy markets is a new and highly significant element in the European energy scene and municipalities are making a constructive contribution to this process. About 160 representatives of municipalities from 19 different European countries met at the Energie-Cites Seminar in Barcelona in order to become better informed, to exchange opinions and to debate the consequences at their level of the opening of energy markets. As a consequence they have asked themselves questions and exchanged ideas in relation with their respective situations regarding energy planning, production, distribution, and the role of population motivative. The seminar is organized around one round table about the threats and the opportunities of the opening up of energy markets, and three sessions about: what is going to change for the municipality as energy consumer, what is going to change for the municipality as energy producer, distributor and regulator-developer, and what is going to change for the municipality as motivative. (J.S.)

  18. The city and the energy security; La ville et la securite energetique

    Energy Technology Data Exchange (ETDEWEB)

    Roques, F.; Volkov, E.; Gantes, P.; Peek, P.; Vallar, Ch.; Telegina, E.; Fache, D.; Dreiski, P.; Pouffary, St.; Plate, N.; Kopsov, A.Y.; Benque, J.P.; Allegre, M.; Gsell, K.; Sanchez, M.; Hadhri, M.; Rouyer, J.L.; Rogeaux, B.; Clauwaert, A.; Garin, P.; Mernier, A.; Ruban, L.; Alario, E.; Allegre, M.; Asiani, F.; Banon, G.; Barelli, P.; Benque, J.P.; Bertoglio, S.; Blot, Y.; Bogolyubov, S.; Bonnaure, A.; Cabana, Y.; Casanova, L.; Chegodaev, A.; Cisse, S.; Clauwaert, A.; Colombier, A.M.; Collard, P.; Coma, O.; Combe, M.; Corbiere-Medecin, A.; Courdy, J.C.; Coursimault, E.; D' Addio, J.C.; Dastarac, H.; Daugreilh, J.P.; Surville, H. de; Doz, M.; Dreiski, P.; Efimouchkine, S.; Fache, D.; Ferrari, B.; Forkasiewicz, J.; Gantes, P.; Garin, P.; Gouirand, P.; Gsell, K.; Guibbolini, P.; Guillot, V.; Hadhri, M.; Ionescu, S.; Kostyuk, V.; Lecach, J.; Lorieux, L.; Luca, L.; Mangeard, Ph.; Matchabelli, V.; Mernier, A.; Murgeanu, R.; Nastase, A.; Nigoul, C.; D' Oleon, M.; Ollivier, J.; Oulianovsky, Y.; Pages, D.; Pataki, Z.; Peek, P.; Perdigon, M.F.; Piacenza, M.; Plate, N.; Poirier, J.; Pouffary, St.; Prez, Ch.; Prufer, Y.; Rogeaux, B.; Roques, F.; Rouyer, J.L.; Ruban, L.; Sanchez, M.; Sayamov, Y.; Semenescu, O.; Skorov, G.; Telegina, E.; Theiler, Ch.; Thomas, D.; Valais, M.; Vallar, Ch.; Volkov, E.; Von Scholz, H.; Waechter, M.; Zaboussov, V.; Zakharova, N.; Zoubkov, Y

    2006-07-01

    The answers to the world energy crisis should not be limited to the management of geopolitical factors (Iran, Nigeria, Venezuela etc.) and to the control of the offer (inciting OPEC countries to optimize their production). They involve also a change of the demand and of the consumers' behaviour. The comments caused by the recent rise of oil prices have shown that this idea, considered as marginal by policy-makers, has started to make its way. The analyses limited to macro-economical units (states, international organization), always forget that cities are the main places of energy consumption. Recent events, like the repetitive saturation of power grids at the origin of spectacular blackouts (Moscow, California, Switzerland, Italy), have led the local authorities to take into consideration part of the problem. They effectively have at their disposition some important leviers which allow them to act both on the offer and on the behaviours. It is evident that in domains like transports, urban renovation or waste treatment, the local authorities have to play a significant role by implementing policies that maximize the energy efficiency and minimize the costs at the same time. The debates which took place during this forum were based on the experiences and realizations presented by experts of several big cities, in particular of Moscow, Madrid and Nuremberg. Some remarkable examples were presented, in particular in the domain of energy auditing, mastery of energy consumptions and production of alternative resources. The usual topics were also approached: energy overview, main trends of the present day energy policy of Russia, new opportunities of new technologies, geo-energy evolutions, Russia-European Union dialogue. (J.S.)

  19. Speaker's presentations. Energy supply security; Recueil des interventions. Securite d'approvisionnement energetique

    Energy Technology Data Exchange (ETDEWEB)

    Pierret, Ch

    2000-07-01

    This document is a collection of most of the papers used by the speakers of the European Seminar on Energy Supply Security organised in Paris (at the French Ministry of Economy, Finance and Industry) on 24 November 2000 by the General Direction of Energy and Raw Materials, in co-operation with the European Commission and the French Planning Office. About 250 attendees were present, including a lot of high level Civil Servants from the 15 European State members, and their questions have allowed to create a rich debate. It took place five days before the publication, on 29 November 2000, by the European Commission, of the Green Paper 'Towards a European Strategy for the Security of Energy Supply'. This French initiative, which took place within the framework of the European Presidency of the European Union, during the second half-year 2000. will bring a first impetus to the brainstorming launched by the Commission. (author)

  20. Energy Research in Switzerland in 2009; Energieforschung 2009. Ueberblicksberichte/Recherche energetique 2009. Rapports de synthese

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2010-06-15

    This very comprehensive annual report for the Swiss Federal Office of Energy (SFOE) contains the overview-reports for the year 2009 that were made by the heads of the following program-groups covered by Swiss energy research: Efficient energy use, renewable energy, nuclear energy and the energy-economy-society area. Under the comprehensive topic of efficient energy use, building concepts compatible with the '2000-Watt Society', Minergie-P 'passive' housing, calculation and dynamic simulation tools, sustainable building projects and developments in the building insulation area are mentioned along with refurbishment topics, the use of solar-thermal energy and electrical efficiency. In the traffic area, lightweight vehicles, drive systems - including hybrid systems - are reported on, as are electric scooters, vehicle-to-grid power storage and inter-modal transport systems. In the accumulators area, various new systems are looked at. With respect to electrical technology, work on electricity storage, conversion and high-temperature superconductors are reported on. Alternative power generation and storage systems are reviewed. Developments in the information and communications area are noted. 'Smart metering', standby losses and lift drives are reported on, as are household appliances and lighting systems. In the electricity area, the interaction of electricity grid and communication systems as well as future energy networks are reported on. In the heat pump and combined heat and power generation area, improving thermodynamic processes, integral system optimisation and high-efficiency systems as well as environment-friendly refrigerants and magnetic heat-pumps are discussed. Combustion topics reviewed include how research basics can be improved, numerical simulation methods, large diesel engines, catalytic reactions, the use of biogenic fuels and exhaust gas treatment. The 'Power Station 2020' and carbon capture and storage program reports on combined heat and power stations and efficient gas turbines. Increasing efficiency and the use of CO{sub 2}-neutral fuels are discussed, as is CO{sub 2} sequestration. Hydrogen production and storage and associated safety aspects are looked at, as are developments in the fuel cell and the industrial processes areas. Renewable energy topics noted include solar collectors and the storage of solar heat, building integration, thin-film photovoltaics, dye-based and organic solar cells and electrical system technology. High-temperature industrial applications are noted. Biomass and wood-fuel topics are covered, including particle emissions, eco-balances and the anaerobic digestion of biomass. In the hydropower area, pump-storage schemes and the classification of streams and rivers are dealt with, as is the development of a diagonal-turbine. The uses of shallow geothermal energy and deep-heat mining are reported on, as is three-dimensional modelling. Research and component development in the wind-energy area and the social acceptance and modelling of such installations are presented. In the nuclear energy area, work done at various laboratories and human factors in safety issues are covered, as are waste disposal and future reactor concepts. A new 'hot-laboratory' is introduced and nuclear fusion research work is noted. Within the framework of the 'Energy-Economy-Society' programme, building renovation, traffic and mobility topics, energy efficiency and rebound-effects, energy politics, technology transfer and innovation, decentralised power production and the risks of nuclear energy are dealt with.

  1. Technical papers 1: regional energy accounting; Cahiers techniques 1: bilan energetique regional

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    The regional energy accounting is an appropriate tool to the elaboration energy conservation programs. It allows to identify the regional stakes and understand the impacts of the energy policies. In this accounting the consumptions are presented by energy products (petroleum products, mineral solid fuels, renewable energies, electric power, natural gas) and by consumption sectors (steel metallurgy, accommodation, ternary industry, agricultural, transport). (A.L.B.)

  2. Metering and energy audit : the key to success; Mesurage et verification energetique : la cle du succes

    Energy Technology Data Exchange (ETDEWEB)

    Milot, J. [Econoler, Quebec, PQ (Canada)

    2010-01-01

    The most widely used measurement and verification (M and V) procedure for energy performance contracting (EPC) projects is the International Performance Measurement and Verification Protocol (IPMVP). This article discussed the IPMVP as a tool for measuring the success of energy efficiency projects. The IPMVP provides an overview of current best practice techniques available for verifying results of energy efficiency, water efficiency and renewable energy projects in commercial and industrial facilities. Facility operators can use the IPMVP to evaluate and improve facility performance. Energy conservation measures (ECMs) covered in the protocol include fuel saving measures, water efficiency measures, load shifting and energy reductions through installation or retrofit of equipment, or modification of operating procedures. 2 figs.

  3. Increasing the energy performance of cement works; Des solutions pour ameliorer la performance energetique des cimenteries

    Energy Technology Data Exchange (ETDEWEB)

    Bolliger, M.; Gallestey, E.; Crosiey, G.; Kiener, M.

    2009-07-01

    Cement works are consuming much thermal and electric energy and this affects the production cost. In the past years, much effort has been put on how to reduce this consumption and cost. Alternative fuels and raw materials have been introduced. As a result the optimization of the production process has become more sophisticated. This article describes a series of computerized tools developed by the company ABB Ltd., which were designed to improve quality assurance and productivity. They apply to the whole production process, including the rotary kiln, the pollutants' emissions in exhaust gases, the numerous ventilators and the crushers. Variable speed drives for ventilators and temperature control in the kiln are amongst the key factors. The optimizers also consider the different cement qualities to be produced in successive batches and the time-dependent electricity prices.

  4. Elements of reflection for an energy policy; Elements de reflexion pour une politique energetique

    Energy Technology Data Exchange (ETDEWEB)

    Nifenecker, H. [Centre National de la Recherche Scientifique (CNRS), 38 - Grenoble (France)

    2005-07-01

    Any energy policy must be considered at three different levels: world, European and national. It must make a distinction between the objectives to reach, the technical means to be implemented and it must define the most suitable economical methods. This document makes such an analysis: the energy scenarios at the world level (different energy needs, energy intensities and CO{sub 2} productions), the share of nuclear energy (new reactor types), of hydrogen and of renewable energy sources; the energy policy at the European scale (different possible roles for the European Union: general guidelines, or decisional liability); the choices that France should make: development of renewable energy sources, of hydrogen and of mass transportation systems. (J.S.)

  5. The 2005 energy situation in France; Bilan energetique de l'annee 2005 en France

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-04-15

    After a year 2004 of economic revival, 2005 shows a crisis of the energy prices and a slow economic activity. The year is characterized by again a petroleum consumption decrease, a poor hydro electric power which generates an increase of the fossil fuels consumption and finally a little increase of the primary energy consumption and CO{sub 2} emissions. It provides more details on the economic and energy context, on the energy consumption and production and on the carbon dioxide emissions from the energy. (A.L.B.)

  6. Automobile air-conditioning its energy and environmental impact; La climatisation automobile impact energetique et environnemental

    Energy Technology Data Exchange (ETDEWEB)

    Barbusse, St.; Gagnepain, L.

    2003-05-01

    Over the last three decades, automobile manufacturers have made a lot of progress in specific fuel consumption and engine emissions of pollutants. Yet the impact of these improvements on vehicle consumption has been limited by increased dynamic performances (maxi-mum speed, torque), increased safety (power steering and power brakes) and increased comfort (noise and vibration reduction, electric windows and thermal comfort). Because of this, the real CO{sub 2}-emission levels in vehicles is still high in a context where road transport is a major factor in the balance sheet of greenhouse gas emissions, thus in complying with the inter-national climate convention. Although European, Japanese and Korean manufacturers signed an important agreement with the European Commission for voluntarily reducing CO{sub 2} emissions from their vehicles, with a weighted average emission goal by sales of 140 grams per km on the MVEG approval cycle by 2008, it has to be noted that the European procedures for measuring fuel consumption and CO{sub 2} emissions do not take accessories into account, especially air-condition ng (A/C). The big dissemination of this equipment recognized as a big energy consumer and as using a refrigerant with a high global warming potential ed ADEME to implement a set of assessments of A/C's energy and environmental impact. In particular these assessments include studies of vehicle equipment rates, analyses of impact on fuel consumption as well as regulated pollutant emissions in the exhaust, a characterization of the refrigerant leakage levels and an estimate of greenhouse gas emissions for all air-conditioned vehicles. This leaflet summarizes the results of these actions. All of these studies and additional data are presented in greater detail in the document,-'Automobile Air-conditioning' (ADEME reference no. 4985). (author)

  7. France's energy bill in 2008; La facture energetique de la France en 2008

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2009-06-15

    This article comments the important increase of France's energy bill in relationship with oil prices and dollar value fluctuations during 2008. It discusses the explosion in oil prices before the financial crisis and their subsequent evolution, and the evolutions of other energies' prices (natural gas, coal, electricity). Tables and graphs are given on various indicators: average monthly oil price expressed in euros and in dollars, gas spot price, annual average quotations for different crude oil prices, annual average imported oil price, and annual average imported and exported energy prices. It comments the global decrease of energy imports, their evolutions since 2006 with respect to the supplying country. It analyses the energy bill's evolution for oil and gas, discusses its importance with respect to France's GDP, and assesses it in terms of worked days for each inhabitant. Tables contain data indicating, for 2007 and 2008, the levels of imports, exports, and of the resulting bill for the different products (mineral fuels, crude oil, refined oil products, gas), and also give a comparison between the energy bill and other economic aggregates.

  8. 2004 energy bill of the France; Facture energetique de la France en 2004

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    This document analyzes the energy bill in France (28,35 milliards of euros), which increased of 24,1 % in 2004. This increase is due to the net imports and especially the fossil fuels. Statistical data and the presentation of Patrick Devedjian, delegated ministry for the Industry, illustrate this economic analysis. (A.L.B.)

  9. Cirque du Monde et résilience : interaction entre les enjeux artistiques et les enjeux psychosociaux dans l'action de l'artiste social auprès de jeunes marginalisés

    OpenAIRE

    Gravel-Richard, Pascale

    2008-01-01

    Cette recherche en Études théâtrales se situe dans le domaine des arts populaires et communautaires et dans une perspective pédagogique des arts du cirque. Elle porte davantage sur les aspects relationnels et artistiques que sur les aspects techniques des arts du cirque. Ces derniers sont abordés dans la perspective plus large du développement de la personne. La présente étude fait appel aux sous-champs disciplinaires de la résilience et de la créativité, dans un contexte pédagogique d'éducat...

  10. « Nudges » : Validité, limites et enjeux éthiques, notamment en santé

    OpenAIRE

    Huyard , Caroline

    2016-01-01

    International audience; The concept of “nudge” has recently spread accross the field of research that addresses the issue of health behaviours change. According to Thaler and Sunstein (2008) a nudge is “any aspect of the choice architecture that alters people’s behavior in a predictable way without forbidding any options or significantly changing their economic incentives”. Similar concepts, such as persuasive technology or manipulation, have been studied for decades in the fields of design, ...

  11. La terre et la mer, les enjeux de la limite. France, littoral atlantique, XIXe-XXe siècle

    Directory of Open Access Journals (Sweden)

    Danièle Closier

    2011-05-01

    Full Text Available Composition du JuryMonsieur Daniel Nordman, directeur de recherche émérite au CNRS, Directeur de thèse,Madame Jacqueline Lalouette, professeur à l’université de Lille–III,Monsieur Gérard Le Bouëdec, professeur à l’université de Bretagne–Sud,Madame Marie-Vic Ozouf-Marignier, directrice d’études à l’ÉHESS,Monsieur Fernand Verger, professeur émérite à l’École normale supérieure,Madame Nadine Vivier, professeur à l’université du Maine.Thèse soutenue le3 avril 2010RésuméLa limite entre terre et me...

  12. The energy in all states: data, constraints, stakes; L'energie sous toutes ses formes: donnees, contraintes, enjeux

    Energy Technology Data Exchange (ETDEWEB)

    Balian, R [Academie des Sciences, 92 - Gif sur Yvette (France); Combarnous, M [Bordeaux-1 Univ., LEPT-ENSAM, 33 - Talence (France); Lucas, J; Fauvarque, J F [Conservatoire National des Arts et Metiers (CNAM), 75 - Paris (France); Madet, D [Electricite de France (EDF), 75 - Paris (France); Bal, J L [Agence de l' Environnement et de la Maitrise de l' Energie, ADEME, 75 - Paris (France); Jourde, P [CEA Cadarache, GENEC, 13 - Saint-Paul-lez-Durance (France); Tissot, B [Commission Nationale d' Evaluation, 75 - Paris (France); Leconte, Ph [CEA Saclay, Dir. du Developpement et de l' Innovation Nucleares DDIN, 91 - Gif Sur Yvette (France); Doubre, H [Paris-11 Univ., IN2P3/CNRS, 91 - Orsay (France); Alleau, Th [Association Francaise de l' Hydrogene, AFH2, 75 - Paris (France); Durup, G [Mining Research Institute (United States); Le Treut, H [Ecole Nationale Superieure, 75 - Paris (France); Tubiana, M [Institut Gustave Roussy, 94 - Villejuif (France); [Centre Antoine Beclere, Paris (France); Masse, R [Office de Protection contre les Rayonnements Ionisants, 78 - le Vesinet (France); Lebot, B [Agence Internationale de l' Energie, 75 - Paris (France); Babusiaux, D [Institut Francais du Petrole (IFP), 92 - Rueil-Malmaison (France); Saab, A E [Electricite de France (EDF), 75 - Paris (France)

    2002-07-01

    This documents brings together papers presented at the physics summer school of august 2001 on the energy. The following topics are discussed: the constraints bound to the physics and the scales, the renewable energies, the future of the nuclear energy and the fossil energies, the energy storage problems, the environmental and sanitary aspects, the energy mastership and economy. (A.L.B.)

  13. Télétravail : Les enjeux de la déspatialisation pour le management humain

    Directory of Open Access Journals (Sweden)

    Laurent Taskin

    2006-07-01

    Full Text Available En rompant avec une certaine unité de temps, de lieu et d’action, le télétravail bouleverse l’organisation du travail et l’exercice traditionnel des pratiques de management. La déspatialisation, qui renvoie à la distance physique et psychosociologique induite par la pratique du télétravail, constitue l’enjeu central de cette re-régulation nécessaire qui altère fondamentalement la structure du travail et de la supervision. Au cœur de celle-ci, la question du contrôle semble être la dimension la plus critique pour le management. Cette contribution montre comment le contrôle et l’autonomie, qui sont des forces complémentaires en tension au sein des organisations, sont appelés à être reconfigurés dans le cadre du télétravail ; et comment cette nécessaire re-régulation affecte directement la relation managériale, la socialisation organisationnelle et la gestion des carrières.Telework transforms the traditional office space, its management and routines, by exploding the spatio-temporal framework of work. Despatialization, which refers to the geographical and psycho sociological distance consecutive to telework practice, constitutes the major stake of the necessary re-regulation of work in terms of supervision and structure. In tfis context, the control issue represents the most critical dimension for management. This contribution shows how control and autonomy, which are complementary but tightened forces operating inside organizations, have to be re-cast when developing telework; and how this re-regulation affects directly the managerial relationship, organizational socialization, and career management.

  14. Les enjeux des marchés du colza et de ses dérivés

    Directory of Open Access Journals (Sweden)

    Dronne Yves

    2003-05-01

    Full Text Available Le colza représente dans l’Union Européenne (UE la première graine oléagineuse produite localement, la principale huile végétale produite et consommée dans cette zone, et une source de protéines pour l’alimentation animale de grande importance à côté du tourteau de soja essentiellement importé sous forme de graines et de tourteaux à partir de l’Amérique du Nord et du Sud. Alors que les marchés potentiels des co-produits du colza, de plus en plus diversifiés, demeurent très importants pour l’alimentation humaine, animale et les usages techniques, la production n’augmente que faiblement depuis un certain nombre d’années en raison d’une part de la difficile compétition de cette culture par rapports aux autres spéculations végétales de l’UE et notamment au blé, et d’autre part de la forte pression sur les prix qu’exerce l’environnement international, où dominent de plus en plus les tourteaux de soja pour les matières riches en protéines et les huiles de palme et de soja pour les matières grasses végétales. Cette situation est d’abord en relation avec l’évolution de la Politique Agricole Commune (PAC où, depuis la mise en place de l’Agenda 2000, les graines oléagineuses ont subi un découplage « vers le bas » avec un abaissement des aides directes pour ces produits au niveau de celles attribuées aux céréales, alors qu’aux Etats-Unis, depuis le Fair Act de 1996, le soja comme les autres oléagineux a bénéficié d’un découplage « vers le haut », avec l’attribution à ces produits des mêmes avantages que pour les céréales. La transformation du soutien par les prix aux producteurs de soja et autres oléagineux en soutien des revenus par la création des Marketing Loans a contribué à un effondrement des prix mondiaux des huiles et tourteaux à partir de 1998 qui a pénalisé l’ensemble des producteurs mondiaux d’oléagineux et notamment ceux de l’UE. Cette évolution des prix des produits du colza a été renforcée par le très fort développement des productions de soja au Brésil et en Argentine, ainsi que d’huile de palme en Malaisie et en Indonésie. Le colza continue malgré tout à bénéficier de nombreux atouts pour l’agriculture européenne. Face à des produits d’importation qui sont de plus en plus obtenus à partir de graines OGM et dont la traçabilité est de plus en plus difficile à garantir, les consommateurs et utilisateurs en alimentation animale sont de plus en plus sensibilisés à l’intérêt que présentent cette huile et ce tourteau. Maintenant que l’UE n’est plus soumise aux limites de surface en oléagineux héritées de Blair House, il est important que le colza puisse continuer à bénéficier d’importants efforts de recherche pour que son rendement évolue au moins au même rythme que celui des céréales et que la mise sur le marché de nouvelles variétés avec des compositions améliorées en huile et en protéines lui permette d’être plus compétitif au niveau des différents créneaux d’utilisation. Il est également important que l’intérêt de cette culture au niveau environnemental, notamment comme instrument de diversification des rotations, soit pleinement reconnu par les pouvoirs publics de l’UE.

  15. Renewable energies: reality of the facts, data and stakes; Energies renouvelables: realite des faits, chiffres et enjeux

    Energy Technology Data Exchange (ETDEWEB)

    Antolini, A.

    2002-12-15

    Facing the public hostile declarations, this analysis takes stock on the renewable energies situation in France. It offers information and discusses the following topics: the french objectives, the real cost of the renewable energies, the french opinion, the market and the needed efforts, the contribution of the renewable energies to the greenhouse effect and the renewable energies as an employment source. (A.L.B.)

  16. MOYENS ALTERNATIFS DE RÈGLEMENT DES LITIGES: REALITÉS, PERSPECTIVES ET ENJEUX EUROPÉENS

    Directory of Open Access Journals (Sweden)

    Angelica ROŞU

    2006-01-01

    Full Text Available In Europe, the development of alternative dispute resolution is related to many circumstances.ADR techniques are being used more and more, as parties and lawyers and courts realize that these techniques can often help them resolve legal disputes faster and cheaper and more privately than can conventional litigation. More- over, many people prefer ADR approaches because they see these methods as being more creative and more focused on problem solving than litigation, which has always been based on an adversarial model.Although certain ADR techniques are well established and frequently used — for example, mediation and arbitration — alternative dispute resolution has no fixed definition.The definition of alternative dispute resolution is constantly expanding to include new techniques.

  17. Études des pratiques funéraires éthiopiennes : contextes, sources et enjeux. Introduction au dossier

    Directory of Open Access Journals (Sweden)

    Anaïs Wion

    2012-01-01

    Full Text Available Ce dossier rassemble des articles issus d’un séminaire de recherche sur la mort et les funérailles en Éthiopie qui a eu lieu entre 2002 et 2004 au Centre de recherches africaines de l’Université Paris 1 Panthéon-Sorbonne, animé par les enseignants-chercheurs, chercheurs, doctorants et post-doctorants travaillant sur l’Éthiopie. Ce séminaire se voulait délibérément ouvert aux différentes périodes, aux disciplines, aux aires culturelles qui recouvrent l’espace éthiopien d’aujourd’hui, même si l...

  18. La diaspora africaine et l'identité biculturelle : Enjeux et défis pour la ...

    African Journals Online (AJOL)

    Up to now, observation has shown that the action of diaspora associations in favor of the continent remains remarkable, through remittances, social economy ... the two aforementioned and would be enriched by the contributions of both cultures (example: the role of technological socialization in the Asian cultural model).

  19. The energy in all states: data, constraints, stakes; L'energie sous toutes ses formes: donnees, contraintes, enjeux

    Energy Technology Data Exchange (ETDEWEB)

    Balian, R. [Academie des Sciences, 92 - Gif sur Yvette (France); Combarnous, M. [Bordeaux-1 Univ., LEPT-ENSAM, 33 - Talence (France); Lucas, J.; Fauvarque, J.F. [Conservatoire National des Arts et Metiers (CNAM), 75 - Paris (France); Madet, D. [Electricite de France (EDF), 75 - Paris (France); Bal, J.L. [Agence de l' Environnement et de la Maitrise de l' Energie, ADEME, 75 - Paris (France); Jourde, P. [CEA Cadarache, GENEC, 13 - Saint-Paul-lez-Durance (France); Tissot, B. [Commission Nationale d' Evaluation, 75 - Paris (France); Leconte, Ph. [CEA Saclay, Dir. du Developpement et de l' Innovation Nucleares DDIN, 91 - Gif Sur Yvette (France); Doubre, H. [Paris-11 Univ., IN2P3/CNRS, 91 - Orsay (France); Alleau, Th. [Association Francaise de l' Hydrogene, AFH2, 75 - Paris (France); Durup, G. [Mining Research Institute (United States); Le Treut, H. [Ecole Nationale Superieure, 75 - Paris (France); Tubiana, M. [Institut Gustave Roussy, 94 - Villejuif (France)]|[Centre Antoine Beclere, Paris (France); Masse, R. [Office de Protection contre les Rayonnements Ionisants, 78 - le Vesinet (France); Lebot, B. [Agence Internationale de l' Energie, 75 - Paris (France); Babusiaux, D. [Institut Francais du Petrole (IFP), 92 - Rueil-Malmaison (France); Saab, A.E. [Electricite de France (EDF), 75 - Paris (France)

    2002-07-01

    This documents brings together papers presented at the physics summer school of august 2001 on the energy. The following topics are discussed: the constraints bound to the physics and the scales, the renewable energies, the future of the nuclear energy and the fossil energies, the energy storage problems, the environmental and sanitary aspects, the energy mastership and economy. (A.L.B.)

  20. Evaluation du potentiel des zoos à reconnecter les citoyens à la nature et aux enjeux de conservation

    OpenAIRE

    Colléony , Agathe ,

    2016-01-01

    With the on-going biodiversity crisis, growing urban lifestyles decrease opportunities to experience nature. However, an intimate relationship with nature has various benefits, for individual well-being, health or attention restoration, but also for environmental issues. Much research effort explored the extent to which people feel being part of the natural world, and thus focused more recently on the importance of reconnecting people – especially urban dwellers – with nature and conservation...

  1. Caucasus and the petroleum stakes of Caspian Sea; Le Caucase et les enjeux petroliers de la Mer Caspienne

    Energy Technology Data Exchange (ETDEWEB)

    Jalillosoltan, N. [Universite de Franche Comte, 25 - Montbeliard (France); Faculte de Droit de Besancon, 25 (France)

    2001-07-01

    The splitting of the former USSR block in 1991 has generated a shock wave in the Caucasus area with the will of all ex-soviet republics to reach their complete independence. Because of the historical and geographical complexity of Caucasus, both geopolitical and human, this disorder has generated even more hazardous results, enhanced by the coveted oil and gas reserves of the Caspian Sea. This article analyses the petroleum stakes as factors of rivalry and instability (sovereignty of oil and gas fields, rivalries about the exploitation and transport of hydrocarbons), but also as factors of cooperation and re-composition. (J.S.)

  2. Les enjeux socio-économiques autour de l'agroforesterie villageoise à Aguié (Niger

    Directory of Open Access Journals (Sweden)

    Dramé Yayé, A.

    2008-01-01

    Full Text Available Issues around Village Agroforestry in Aguié (Niger. In the framework of a partnership between the Abdou Moumouni University of Niamey (Niger, The Catholic University of Louvain (Belgium, The Gembloux Agricultural University (Belgium, The University of Liege (Belgium, The asbl ENDA Intermondes and the PPILDA Project, former PDRAA of Aguié (Niger, studies were conducted in 2003 and 2004 in two villages (Dan Saga and Guidan Bakoye in Aguié, located in the Region of Maradi (Middle South of Niger. These studies were requested by farmers, and aimed at precising the feasibility and conditions for creating a rural wood market. They consisted in the evaluation of the assisted natural regeneration obtained through the protection of tree shoots in the fields. Dan Saga and Guidan Bakoye villages are typical Combretum glutinosum and Piliostigma reticulatum areas where farmers from all social categories practised the assisted natural regeneration, leading to densities of more than 100 trees per hectare in the fields. These densities increase with the increasing distance from the villages. The weekly amount of offered firewood (about 10 to 50 bundles of 25 kg each and timber in the local market could generate more than CFA 1 million income. However, the lack of local purchasers makes it difficult to sell more than the third of the wood production. This is what seems to be another reason for creating a wood market network. This network would be a grouping of villages not always belonging to the same administrative entity, but organized around common social and economical development concerns. The PPILDA Projet calls such a network a "Between-Villages Network". The management of the natural regeneration of tree species in the fields has favoured the emergence of various actors whose conflicting interests destabilized the pre-existing social structures. The only way to adapt to these social mutations is to establish an incentive agroforestry policy, to define the new actors' role and to make an important investment in the capacity building of these actors.

  3. Energy stakes. From geopolitics to the citizen; Les enjeux de l'energie. De la geopolitique au citoyen

    Energy Technology Data Exchange (ETDEWEB)

    Iacona, E.; Taine, J. [Ecole Centrale de Paris, 75 (France); Tamain, B. [Ecole Superieure d' Ingenieurs de Caen, 14 - Paris (France)

    2009-07-01

    This book deals with some of the main questions that any responsible citizen should ask: what will be the usable energy resources in the coming 20 or 30 years? At these dates what will be the renewable energies contribution? What energy vectors will be associated to its main uses in the domestic, transportation and industry sectors? Will research allow to master the new electricity and hydrogen technologies? The book is organized in three parts: the first part makes a status of the energy question in most countries in the world, the second part analyses the constraints and challenges to take up in the coming decades in order to manage energy in an optimal way. Finally, the last part is a prospective study about the mastery of energy consumption and about the future technical solutions of energy production and utilisation. (J.S.)

  4. Introduction de salmonidés en milieu vierge (Îles Kerguelen, Subantarctique : enjeux, résultats, perspectives

    Directory of Open Access Journals (Sweden)

    DAVAINE P.

    1997-01-01

    Full Text Available Les îles Kerguelen (Terres Australes et Antarctiques Françaises sont, à l'origine, vierges de toute espèce de poisson d'eau douce. Les quelques espèces de Salmonidés, introduites à la fin des années cinquante dans le cadre d'une politique d'occupation et de mise en valeur du Territoire, se sont acclimatées à l'environnement subantarctique et naturalisées avec plus ou moins de succès en fonction de leurs stratégies adaptatives respectives. Objet d'un suivi scientifique continu, ces populations apparaissent comme d'excellents modèles pour des études de génétique et de dynamique des populations. Les phénomènes de colonisation, limités dans un premier temps à l'augmentation régulière des densités de population et une extension rapide intra-rivière, ont connu un développement spectaculaire depuis les années quatre-vingt, à la suite des modifications importantes du climat local, dont l'influence sur les populations a été multiple. La vaste superficie de Kerguelen et les caractéristiques de ses réseaux hydrographiques permettent d'envisager de continuer à tirer parti positivement des introductions passées de Salmonidés, sur les plans scientifique et de mise en valeur du territoire, tout en développant une politique de protection des écosystèmes aquatiques et terrestres conforme à l'évolution actuelle des mentalités.

  5. Jeunes, politique et médias : enjeux de légitimités dans la Tunisie ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Youth, Politics and the Media: Legitimacy Issues in Post-Revolutionary Tunisia ... youth have represented a fundamental challenge for the country's political stability. ... during the so-called "Arab Spring," and continuing instability in the region, ...

  6. Couverts herbacés pérennes et enjeux environnementaux (en particulier eutrophisation) : atouts et limites

    OpenAIRE

    Vertes, Francoise; Benoit, Marc; Dorioz, Jean Marcel

    2010-01-01

    Outre des fonctions de production, les prairies assurent diverses fonctions environnementales dont la protection de la qualité des eaux et des sols. Dans quelle mesure et à quelles conditions ces fonctions non productives sont elles assurées par les couverts herbacés pérennes ? Après la présentation des principaux processus impliqués dans les cycles de l'azote et du phosphore, les moyens de limiter les pertes en N et P sont rappelés, à l'échelle de la parcelle, de l'exploitation et du bassin ...

  7. The Areva Group back-end division - challenges and prospects; Le pole aval dans le groupe Areva - enjeux et perspectives

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-06-01

    This document presents the Areva Group back-end division challenges and prospects. Areva, a world nuclear industry leader, analyzes in this document, the high-profile mix of complementary activities of the nuclear energy industry, concerning the back-end division the full range of services for the end of the fuel cycle, the fuel cycle back-end markets, the economic and financial associated considerations. (A.L.B.)

  8. Linguistique textuelle et poésie plastique : quelques enjeux épistémologiques et méthodologiques

    Directory of Open Access Journals (Sweden)

    Chol Isabelle

    2012-07-01

    Full Text Available L'article a pour objectif de montrer comment certaines productions poétiques, depuis le Coup de dés de Mallarmé faisant de l'espacement un élément de composition du texte écrit, interrogent la textualité dans son processus de construction et ses limites. Il s'agira alors de réfléchir sur les possibilités d'une linguistique de l'écrit qui permette d'envisager les processus de textualisation dont la mise en scène dans certaines productions est aussi une mise en question, ainsi que les processus de stylisation qu'ils engagent. Le projet d'une réflexion concernant les outils d'analyse et la démarche interprétative susceptibles de rendre compte des productions poétiques spatialisées s'inscrit actuellement dans le cadre d'un programme ANR (ANR LEC, resp. I. Chol en cours. L'article proposé vise donc simplement à poser quelques jalons pour cette réflexion rendue nécessaire par un corpus d'oeuvres qui échappent aux classifications. Un corpus qui va du début du XXe siècle à nos jours permettra ainsi d'affronter un certain nombre d'outils d'analyse et de concepts à la pratique, et d'émettre quelques propositions, notamment par rapport au concept d' "objet-texte", par rapport à la notion de "syntaxe" et à l'énonciation. Il s'agira aussi de montrer que l'écart que manifestent ses productions avec l'organisation sémantico-syntaxique que la norme communicationnelle suppose ne saurait se résoudre dans le constat d'un double appartenance sémiotique (linguistique et plastique. La dimension linguistique doit elle-même être réévaluée, en partie du moins, par l'élargissement ou l'ajout de certains concepts aptes à rendre compte de l'ensemble des processus de textualisation et de stylisation, incluant notamment le blanc typographique. Un dernier point qui sera alors aussi abordé est celui de l'apparition de nouvelles normes supposant une nouvelle éthique du langage.

  9. La médecine prédictive en oncologie, une discipline en construction : quels changements dans les questions éthiques, quel regard sur la vie des individus concernés

    Directory of Open Access Journals (Sweden)

    de Montgolfier Sandrine

    2015-01-01

    Full Text Available La médecine prédictive a pour but d’identifier des êtres humains à risque de développer une maladie liée à une anomalie génétique mais également de connaître les risques chez de futurs parents de transmission d’un caractère à leur descendance. Dans le contexte de la cancérologie, nous nous intéresserons particulièrement à la question de la validité clinique de ces données, de l’interface entre clinique et recherche que les nouvelles technologies de séquençage amènent. Nous développerons les questionnements éthiques posés par ces nouvelles technologies et leurs changements au cours du temps. Chaque résultat de tests mobilise chez les personnes à risque une réflexion profonde sur son statut, sa liberté de savoir ou de ne pas savoir, sur la tension qu’elle développe entre conscience, liberté et destin. Se pose également la question de la responsabilité vis-à-vis des membres de la famille et également sur les conséquences d’un éventuel nouvel eugénisme libéral qui se développe au côté du développement de la génétique ? Ces nouvelles pratiques s’accompagnent d’une injonction à l’autonomie et un appel au choix des personnes tout en créant une forme de contrainte sur la personne et sa famille individuelle dans une société où la bonne santé est mise en exergue comme valeur primordiale. Nous pourrons ainsi amener un début de réflexion sur la manière de former les populations à la question du risque génétique de l’école à l’âge adulte.

  10. La prolongation de la vie humaine selon Francis Bacon. Ou : quel Tithon voulons-nous être ?

    Directory of Open Access Journals (Sweden)

    Dominique Weber

    2011-07-01

    Full Text Available Afin de comprendre avec exactitude la manière dont Francis Bacon envisage la question de la prolongation de la vie humaine, il faut impérativement examiner l’assise théologique de la réflexion du philosophe à ce sujet. Il convient aussi de restituer l’intégration de cette réflexion dans les objectifs plus amples de la philosophie naturelle nouvelle. Enfin, il est nécessaire de comprendre les dimensions proprement morales de la question. Car la prolongation de la vie humaine n’est pas seulement, au sein de la philosophie naturelle nouvelle, un cas parmi d’autres des recherches qu’il faut désormais effectuer : en réalité, c’est elle qui lui donne et qui lui fixe son sens ; avec elle se joue l’effectivité de l’identité espérée entre science et puissance. Mais il faut encore préciser qu’il ne s’agit aucunement pour l’homme de vieillir pour vieillir : il s’agit pour lui de pouvoir vieillir bien. Les leçons que Bacon tire de la fable de Tithon sont ici véritablement décisives.

  11. Volumes of common industrial wastes: a study report; Dechets industriels banals: quel tonnage? rapport d`etude

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-09-01

    The total common industrial waste volume production in France has been evaluated, taking into consideration all the industrial and commercial sectors and the following materials: glass, metals, plastics, rubber, textiles, papers, cardboard, wood, leather, organic matters, building wastes, mixtures. Results are presented for the various regions of France, as a function of enterprise size, waste type and destination; data are also given concerning packaging materials, and waste collection and processing. Comparisons are made with data from other information sources and calculations

  12. L’autorégulation conjointe de la cognition et des émotions : quel impact sur les apprentissages ?

    Directory of Open Access Journals (Sweden)

    Bastien Wagener

    2015-05-01

    Full Text Available Les apprentissages consistent à résoudre des problèmes et à acquérir de nouvelles connaissances et compétences par le biais d’un ensemble de processus relevant de l’autorégulation. Deux aspects principaux rentrent en ligne de compte lorsque l’on cherche à améliorer la résolution de problèmes : la dimension émotionnelle et la métacognition. Les émotions, en tant que réactions organisées et utiles à une situation donnée, peuvent être tour à tour un atout ou un handicap lorsqu’il s’agit d’apprendre. Par ailleurs, la métacognition est constituée d’un ensemble de processus et de savoirs qui s’articulent autour de la prise de conscience et de la régulation de son propre fonctionnement, qu’il soit cognitif ou émotionnel. Grâce aux pratiques de l’attention (PA, issues de traditions permettant un travail sur la conscience et la régulation psychologique et physiologique, il est possible d’agir conjointement sur les cognitions et les émotions. Plusieurs travaux ont montré les nombreux bénéfices que présentent de telles approches et nous constatons également que les effets positifs sur l’autorégulation commencent à être de plus en plus étayés. Nous proposons donc de nouvelles approches holistiques permettant un travail global sur l’autorégulation qui prendraient en compte le traitement métacognitif des sphères cognitive et émotionnelle au bénéfice des apprenants. Simultaneous self-regulation of cognition and emotions and its consequences on learning Abstract: The learning process relies on problem-solving activities and the acquisition of knowledge and skills through self-regulation. Emotions and metacognitions are some of the key aspects that allow the improvement of problem-solving. The emotional dimension consists of structured and useful reactions in regard to a specific situation. Emotions can either be an asset or a disadvantage when one is involved in a learning situation. As for metacognition, it’s a compound of processes and knowledge (of cognitive or emotional nature connected through self-regulation and self-awareness. Thanks to attentional practices (AP, one can regulate both cognitions and emotions. These AP come from various traditions focused on the exploration of the mind and self-regulation of psychological and physiological activities. Many studies show the positive effects of such practices on health, and some recent studies also report improvements in self-regulation thanks to AP. In this paper, we suggest that the creation of new holistic approaches would allow us to work on metacognition and emotions on a global scale, in order to improve the ability of individuals to engage in self-regulated learning efficiently.

  13. Formulation de cas dans la psychose débutante : Quels outils pour le travail en équipe?

    Science.gov (United States)

    Elowe, Julien; Mebdouhi, Nadir; Solida, Alessandra; Conus, Philippe

    2017-01-01

    Nous présentons d’abord brièvement le programme TIPP et les concepts généraux de la prise en charge précoce dans la psychose débutante. Un des objectifs de l’intervention dans la phase précoce des troubles psychotiques est notamment de proposer des soins spécifiques adaptés à cette phase de la maladie. En début de prise en charge, l’équipe de soins et en particulier le gestionnaire de cas (case manager), chef d’orchestre de la prise en charge, sont confrontés à une quantité importante d’information dont il faut dégager les lignes de forces pour mettre en place une prise en charge adaptée. Cet article propose un modèle qui peut constituer un outil de travail précieux pour les équipes travaillant dans l’intervention précoce pour faire émerger une formulation de cas et synthétiser les situations cliniques des patients, en extraire une histoire qui fasse sens et ainsi faciliter la mise en place d’un projet thérapeutique. PMID:28558256

  14. Quel niveau de preuve faut-il exiger en nutrition pour établir des recommandations ?1

    Directory of Open Access Journals (Sweden)

    Bruckert Eric

    2011-11-01

    Full Text Available Like what is done for medical practice, any recommendations on nutrition must be built on a body of evidence to establish the credibility. But what level of evidence does it require? The levels of evidence in nutrition should be improved. Indeed, the fantastic wealth of information undermines the profession, and may be harmful to patients. However, it is not possible to have a level of evidence in the field of nutrition equivalent to that required for the drug. This conference examines the contribution in terms of level of évidence of various epidemiological studies: observational studies, intervention studies, meta-analysis. Finally, the inclusion of all this elements – metaanalysis of observational studies and intervention studies, pathophysiology, is still the best way to bring credibility to the recommendations in nutrition.

  15. Orthographe & grammaire à l’université. Quels besoins ? Quelles démarches pédagogiques ?

    Directory of Open Access Journals (Sweden)

    Françoise Boch

    2012-07-01

    Full Text Available L’étude prend appui sur une analyse statistique de 82 textes produits par des étudiants entrants dans la filière sciences du langage à l’université en septembre 2010. Cette typologie des erreurs (inspirée de  MANESSE ; COGIS, 2007 permet d’identifier les principaux besoins de ce public dans le champ de la langue écrite : morphologie verbale et usage des temps verbaux, accords, ponctuation, orthographe lexicale (double consonnes, accents, formation des adverbes. Cette étude a jeté les bases d’une formation spécifique destinée aux étudiants de Licence première et deuxième année désireux d’améliorer leurs performances en langue. La démarche pédagogique préconisée pour cette formation prend centralement en compte les spécificités du public jeune adulte, caractérisé en particulier par un déficit de confiance en soi lié à des difficultés en langue inscrites dans la durée. Afin de faire évoluer les représentations souvent inhibantes vis-à-vis de leurs propres capacités à progresser à l’écrit, la démarche adoptée cherche à placer les étudiants dans une posture réflexive (LAURENT, 2004, 2009 rompant ainsi avec une attitude passive consistant à recevoir et à (plus ou moins bien utiliser une norme trop peu questionnée (cf. MILLET et al., 1990, groupe RO, 2011. L’enjeu d’une telle formation nous semble résider essentiellement dans ce changement de posture, les contenus proposés (du niveau de l’école primaire et du collège ne présentant aucune difficulté intrinsèque. Dans cette perspective, nous adoptons une démarche résolument inductive, dont la caractéristique principale est de placer les apprenants en situation de chercheur (ici, linguiste, cf. BARTH, 2001, condition sine qua non pour qu’ils prennent réellement et activement en charge leurs apprentissages. Notre contribution présentera dans un premier temps les résultats de l’enquête puis développera la réflexion didactique sous-tendant la démarche pédagogique engagée, en l’illustrant à travers des exemples d’activités.Mots-clés : Orthographe. Formation d’adultes. Analyse réflexive de la langue. Démarche inductive.

  16. Radioactive waste and its impact on the environment; Les dechets nucleaires: quel impact sur l'environnement?

    Energy Technology Data Exchange (ETDEWEB)

    Bonin, B. [Institut de Radioprotection et de Surete Nucleaire en Detachement a Cogema, Dir. de la Recherche et du Developpement, 78 - Velizy (France)

    2002-07-01

    What impact will radioactive waste have on the environment and mankind ultimately? If category B waste and all or some of category C waste is disposed of in a deep geological facility, after an interim storage period which presents its own risks, scientists can now predict that its worst case impact will be minimal and localized. While they cannot strictly demonstrate the safety of disposal over the time scales in question, they can nevertheless vouch for sound, well-engineered design. They can furnish a whole host of convergent evidence to demonstrate that they really have thought of all the events that could affect radioactive packages disposed of in a given environment, separated from the biosphere by barriers with well-defined properties. (author)

  17. Fases minerales portadoras de níquel en el horizonte saprolítico del yacimiento San Felipe

    Directory of Open Access Journals (Sweden)

    Alfonso Chang-Rodríguez

    2015-12-01

    Full Text Available Este artículo reporta el resultado de la caracterización física, química y mineralógica del horizonte saprolítico del yacimiento cubano de lateritas niquelíferas San Felipe. Los análisis por técnicas de DRX, MEB y EDAX mostraron que la capa útil es predominantemente de grano muy fino, menor de 0,074 mm, representando esta fracción alrededor del 80 % en peso como promedio. Las esmectitas son las principales portadoras de Ni (1,0- 4,0 % NiO, seguidas de la goethita (1,0–1,5 % NiO. La serpentina, aunque contiene de un 5,0 % a un 7,5 % de NiO, se encuentran en muy poca cantidad en estos materiales silicatados, al igual que los óxidos de Mn.

  18. Aleación superficial de superaleaciones base níquel mediante láser

    OpenAIRE

    Rodríguez, G. P.; García, I.; Damborenea, J. J.

    1998-01-01

    Ni based superalloys present a high oxidation resistance at high temperature as well as good mechanical properties. But new tecnhology developments forcé to research in this materials to improve their properties at high temperature. In this work, two Ni based superalloys (Nimonic 80A and Inconel 600) were surface alloyed with aluminium using a high power laser. SEM and EDX were used to study the microstructure of the obtained coatings. Alloyed specimens were tested at 1.273 K between 24 and 2...

  19. Les stratégies des entreprises chinoises en Afrique : quels objectifs, quelle coopération ?

    OpenAIRE

    Diaby , Fodé Siré

    2014-01-01

    For the last three decades, the Chinese economy has multiplied it GDP by 15. In order to maintain a strong home economical growth and insure a constant supply of raw material and energy, China turned towards the African continent by quickly and firmly multiplying its foreign direct investments during the last ten years. By becoming the second largest business partner of Africa, as well as a strategic investor, a financial supplier and associated for the development; China has now overturned t...

  20. Changements climatiques au Maroc: quels systèmes de culture et quelles biotechnologies pour s’y adapter ?

    Directory of Open Access Journals (Sweden)

    Abdelhadi AIT HOUSSA

    2017-09-01

    Full Text Available A prospective study is presented on the probable impact of climate change on cropping and livestock systems in Morocco. According to field reports and taking into account the limits of such studies, the direct effect of global warming can lead (and this is already the case in other countries to a new varietal redistribution for the cold demanding species such as rosaceous. Apple cultivars such as the Golden group risk disappearing from the mountains to give way to others less cold demanding cultivars such as the Gala group. The banana and the avocado risk migrating to more continental regions while the olive and the citrus trees will move towards the foot of mountains. Global warming may also induce changes in livestock and cropping systems moving the drought boundary towards the center and north of the country. The arid would probably return to the semi-desert or desert space, the semi-arid would pass partly to the arid zone and the favorable Bour will be semi-arid. As a result to this change, we may expect a lack of water resource inducing an abandoning of grain crops in the arid stage for livestock. Also, we may expect a revising of the existing cropping systems within the rain-fed areas by introducing a little more Dry Farming and early cultivars. In the large irrigated perimeters, it would be necessary to exclude, due to the lack of water, the high water consuming crops such as rice and sugar cane for highly efficient and remunerative crops. Excessive drought predicted by some recent models also suggests a greater need for dams as soon as possible in order to take advantage of the rainy years with exceptional rainfall. On the other hand, it would also be necessary to optimize water management by moving rapidly towards drip irrigation, and by transferring water surplus to deficient areas. Even though the use of seawater as a resource for irrigation seems so far away, the advances in desalinization technology and cost will allow either large scale use of seawater in agriculture or finding new salinity tolerant cultivars. In Morocco, we should think of desalinization with renewable energies (solar, wind and the use of this water mainly in coastal areas where climate, land quality, sun and wind are adequate to these projects. To anticipate the future of food security of the country, attention should be given to the use of readily available resources to overcome the structural deficit in wheat starch and animal protein. The study suggests the use of other starch sources that Morocco can produce easily such as potato. For animal protein, we suggest fisheries resources which are still underused by the population. Résumé On présente une étude prospective concernant l’impact probable des changements climatiques sur les systèmes de culture et d’élevage au Maroc. D’après le constat de terrain et dans les limites de ce que signifie ce genre d’étude, l’effet direct du réchauffement climatique peut conduire à terme (et c’est déjà le cas dans certaines contrées à la nécessité d’une redistribution variétale pour des espèces exigeantes en froid comme les rosacées. Des variétés de pomme, telle que le groupe des Golden, risquent de disparaître des montagnes pour laisser la place à d’autres moins exigeantes comme le groupe des Gala. Le bananier et l’avocatier risquent de migrer vers les régions un peu plus continentales, l’olivier et les agrumes un peu plus vers le pied de la montagne. Le réchauffement climatique peut aussi obliger à faire évoluer les systèmes d’élevage et de culture en faisant déplacer la frontière de la sécheresse un peu plus vers le centre et le nord du pays; l’aride serait peut-être envahi par la désertification, le semi-aride passerait en partie à l’étage aride et le Bour dit favorable en partie dans le semi-aride. Comme corollaire à ce changement, il faudrait s’attendre à une perte de potentiel de ressources en eau qui obligerait probablement à abandonner les cultures pour le grain dans l’étage aride où il n’y aurait plus suffisamment de pluie, au profit de l’élevage, et à revoir les systèmes de culture en introduisant un peu plus d’aridoculture et de variétés plus précoces dans les autres étages d’agriculture pluviale. Dans les grands périmètres irrigués, par manque d’eau l’on serait dans l’obligation de soustraire de ces périmètres toute culture grande consommatrice d’eau telles que le riz et la canne à sucre et, pour des impératifs d’une meilleure valorisation de ce qui va rester, à ne garder que des cultures à forte efficience et fortement rémunératrices. La sécheresse excessive prévisible par certains modèles récents suggère aussi un besoin plus important en barrages dans les plus brefs délais possibles afin de profiter des années très pluvieuses à apports d’eau exceptionnels. Mais, il faudrait aussi optimiser la gestion de cette eau en évoluant rapidement vers la généralisation de l’irrigation localisée et en transférant l’excédent d’eau vers les autres régions déficitaires. Quoi que cela puisse paraître encore lointain, l’eau de mer en tant que ressource inépuisable pour l’irrigation est la vraie solution à terme à condition de lui trouver le déclic technologique pour un usage en grande agriculture à l’instar de l’eau conventionnelle ou de découvrir des variétés permettant de l’utiliser en l’état. Au Maroc, il faudrait penser au dessalage au moyen d’énergies renouvelables (solaire, éolien et à l’utilisation de cette eau dans une première phase, dans les zones côtières où climat, qualité des terres, soleil et vent sont très favorables à ces projets. Pour anticiper l’avenir au plan sécurité alimentaire du pays, il faudrait envisager l’emploi de ressources facilement mobilisables pour combler le déficit structurel en amidon de blé et en protéines animales. L’étude suggère le recours à d’autres sources d’amidon que le Maroc peut produire aisément comme la pomme de terre, et pour le déficit en protéines, une plus forte consommation de ressources halieutiques encore largement sous utilisées par la population.

  1. Remoción de níquel, cadmio y zinc del agua, utilizando clinoptilolita heulandita

    Directory of Open Access Journals (Sweden)

    Thelma B. Pavón Silva

    2000-01-01

    Full Text Available Se aplica el proceso de intercambio iónico con una zeolita natural obtenida en Taxco, Guerrero, México, para la remoción de Zn, Cd y Ni de soluciones acuosas. Para este proceso, el mineral se homoionizó con cloruro de sodio y posteriormente se puso en contacto con soluciones 0.01 N de sales de nitratos de Zn, Cd y Ni, durante 8 días.

  2. EFECTO DEL pH EN LA ADSORCIÓN DE CADMIO, NÍQUEL Y ZINC SOBRE UNA BENTONITA

    Directory of Open Access Journals (Sweden)

    Liz Adriana Pinilla Cuesta

    2010-11-01

    Full Text Available Se estudió el efecto del pH sobre la adsorción de cadmio, niquel y zinc, en solución acuosa a 25"C, sobre una bentonita colombiana proveniente del Valle del Cauca. Los datos experimentales se analizaron con base en las isotermas de adsorción, la constante termodinámica de reparto Kdm (calculada mediante la isoterma de Langmuir, la relación de distribución Rd (obtenida del modelo Baeyens-Bradbury y una gráfica Kurbatov. La adsorción de cadmio, niquel y zinc aumenta con el pH. El orden de adsorción encontrado: Cd > Ni≅Zn coincide con el establecido por el principio HSAB.

  3. Positron emission tomography: Which indications, which benefits?; Tomographie par emission de positons (TEP): quelles indications, quels benefices?

    Energy Technology Data Exchange (ETDEWEB)

    Chassoux, F. [Ctr Hosp St Anne, Serv Neurochirurg, F-75014 Paris (France); Chassoux, F.; Chiron, C. [CEA, I2BM, Serv Hosp Frederic Joliot, F-91 Orsay (France); Chiron, C. [Hop Necker Enfants Malad, INSERM, U663, F-75015 Paris (France); Chassoux, F.; Chiron, C. [Univ Paris 06, F-75005 Paris (France)

    2008-07-01

    Positron emission tomography (PET) is currently used in the pre-surgical workup for drug-resistant partial epilepsies in addition to MRI. Inter-ictal metabolism is studied in clinical practice using {sup 18}fluoro-desoxy-glucose ({sup 18}FDG). In medial temporal lobe epilepsy (MTLE) associated with hippocampal sclerosis, hypo-metabolism ipsilateral to the epileptogenic focus is found in 70-90% of cases. However, hypo-metabolism is larger than the structural lesion observed on MRI and includes the epileptogenic zone and ictal discharge spread areas. Hypo-metabolism is related to surgical outcome and cognitive disturbances in MTLE. Although the usefulness of PET appears less well-established in extra-temporal lobe epilepsy and in children, its sensitivity may be improved by co-registration and superimposition of PET on MRI at any age. Focal hypo-metabolism can be easily detected by visual analysis, allowing detection of minor gyral abnormalities that may correspond to focal cortical dysplasias. Moreover, in cases of negative MRI, focal hypo-metabolism findings may help invasive monitoring planning and deep electrode placement for SEEG, and finally improve surgical outcome. (authors)

  4. Agir dans l'incertain : quelle politique de l'eau en Corse pour quel développement territorial ?

    OpenAIRE

    Casula, Marina

    2012-01-01

    Le Comité de Bassin de Corse créé en 2003, au sein de l'Agence de l'Eau Rhône-Méditerranée-Corse, participe à définir une politique de gestion de l'eau qui réponde aux spécificités insulaires autant qu'aux injonctions réglementaires (DCE). Le concept d'auto-éco-re-organisation (Morin, 1980) permet de saisir l'émergence d'un système d'action, dont la finalité est la prise en compte des spécificités de la Corse dans la définition des orientations stratégiques de la gestion de l'eau (Sdage). ...

  5. Informatización de la minería en la industria cubana del níquel

    Directory of Open Access Journals (Sweden)

    Joel Batista-Leyva

    2001-03-01

    Full Text Available La informatización de un proceso en una empresa es actualmente uno de los problemas más complejos de enunciar y resolver porque presupone integrar en un sistema único y computarizado todas las actividades del proceso. Este trabajo presenta los elementos considerados en la informatización de la Unidad Básica Minera de la Empresa Ernesto Che Guevara de Moa, a partir de: · El estudio preliminar de la situación de la explotación minera en esta empresa. · Los conceptos y fases particulares de dicha informatización. · El desarrollo del sistema algorítmico que garantiza la ejecución de las tareas de pronóstico, control y planificación. · El diseño y desarrollo de software. · La implantación del sistema mediante aplicaciones informáticas. Para cada una de estas etapas se explican los resultados principales obtenidos, donde se destaca el sistema algorítmico para lograr implementar el lazo de control correspondiente a la optimización del proceso, así como el desarrollo de la aplicación computacional Tierra 0 que establece normas básicas para informatizar las tareas de pronóstico, planificación y control de la minería en yacimientos lateríticos en dicha empresa.

  6. Conceptions des élèves en physique: quels effets sur la pratique des enseignants vaudois ?

    OpenAIRE

    Besson, Laurent; Borel, Jérémie; Lo Bello, Philippe

    2014-01-01

    Ce travail de mémoire se centre autour de l'idée que les conceptions, c'est-à-dire les connaissances des élèves à un moment donné, sont souvent un obstacle à l'enseignement. Au vu de l'importance accordée à cette notion dans nos cours de didactique de physique, nous avons voulu voir si cette notion de conception était prise en compte par des enseignants qui n'avaient pas suivi le cursus de formation de la HEP. Nous avons donc interrogé cinq professeur(e)s de physique de différents g...

  7. Which future for conventional pipeline laying barges?; Quel avenir pour les barges de pose de pipelines conventionnelles ?

    Energy Technology Data Exchange (ETDEWEB)

    Borelli, A.; Perinet, D. [ETPM International (International organizations without location)

    1997-05-01

    The aim of this paper is to study the evolution of conventional pipeline laying barges. The past and todays capacities of some barges are presented in order to follow the evolution of their equipments with time to answer the market needs. The second part outlines the main characteristics of todays market needs. Different analyses are made according to the different means of pipeline laying: conventional, flexible pipes and rigid pipes using unrolling technique. Market trends in these 3 domains show a sensible growth from 1996 to 1997 and are assumed to keep a sustained level during the following years. However, the tendency shows an evolution towards smaller diameter pipes and greater depths. The last part concerns the evolution of laying barges. The most important improvements in pipeline laying industry concern the dynamic positioning, the laying techniques (`S` laying technique), and the rate of laying using real-time control techniques. (J.S.)

  8. Petroleum : a social choice, but at what price?; Le petrole : un choix de societe, mais a quel prix?

    Energy Technology Data Exchange (ETDEWEB)

    Gregoire, M.

    2010-10-01

    This article summarized an interview with the chief executive officer of Total, the fifth largest integrated oil company in the world. The interview addressed a range of issues, including oil price trends, industry costs and the company's investment strategy. Total has just invested $1.5 billion in Alberta's oil sands. BP's oil rig blowout and massive spill in the Gulf of Mexico in the summer of 2010 will likely generate interest in the world's second largest hydrocarbon reserves. The main challenge currently facing the CEO of Total is to remake the image of the industry at a time when politics and environmental concerns prevent oil companies from developing, or exploring for, hydrocarbon resources that are needed to meet growing energy demands. Issues of peak oil were also discussed. The CEO emphasized that new technologies continuously allow companies to explore deeper both underwater and underground, but these resources will cost more and be more expensive to operate, particularly if environmental impacts are to be minimized. Safety standards for exploration will likely be enhanced after the disaster in the Gulf of Mexico, despite the fact that very strict rules already exist in areas such as the North Sea and elsewhere. However, offshore oil will not be suddenly replaced by the oil sands, which generate their own environmental problems and have been the subject of attacks from environmentalists and Aboriginal communities. Carbon dioxide emissions, water use and water pollution have been singled out as the primary environmental concerns facing development of Alberta's oil sands. 3 figs.

  9. Screening of antagonistic bacteria against the green mold disease (Trichoderma harzianum Rifai of Grey Oyster Mushroom (Pleurotus pulmonarius (Fr. Quel.

    Directory of Open Access Journals (Sweden)

    Nualsri, C.

    2005-01-01

    Full Text Available A total of 174 strains of bacteria antagonistic against the green mold (Trichoderma harzianum, isolated from cultivating bags and fruiting bodies of the mushrooms, were screened for effects on mushroom mycelia and ability to control the green mold disease. Twenty-eight of them promoted the primodia formation of the Pleurotus pulmonarius mycelia on agar plates. Twenty-two isolates were selected and further tested in a mushroom house. Cell suspension of each isolate was prepared and sprayed onto the spawn surface of P. pulmonarius. Fifteen isolates shortened the times required from watering to 2nd and 3rd flushing and increased yield of the basidiocarps by 1.1-34.3% over 30 days. Six isolates of bacteria which showed an inhibitory effect against T. harzianum, enhanced primordia formation and increased yield of P. pulmonarius were selected and used for control testing in a cultivation house. The suspension of each isolate was sprayed onto the spawn surface immediately after exposure to the air in the mushroom house, followed by spore suspension of T. harzianum two days later. The number of infected bags was counted at 30 days after inoculation and the cumulative yield was compared after 60 days. The results showed that bacteria isolate B012-022 was highly effective in suppressing the green mold disease.Only 6.7% of the cultivating bags were found to be infected by T. harzianum when bacteria isolate B012-022 was applied. Cumulative yield obtained from 900 g of 94% sawdust + 5% rice bran + 1% Ca(OH2 was 300.0 g/bag after 60 days, 71.1% higher than the bags infected by the green mold and without bacterial spraying. Identification of the six bacterial isolates showed all to be Bacillus spp.

  10. Organisation du travail, cultures professionnelles et « technométhodes » : quels effets ?

    Directory of Open Access Journals (Sweden)

    Loïc Brémaud

    2009-03-01

    Full Text Available Notre article s’efforce de présenter les effets de ce que nous nommerons les « technométhodes », c’est-à-dire « le cadre structurant imposé aux praticiens d’une organisation par les technologies et ce principalement depuis le développement et la généralisation de la micro-informatique, technologies qui permettent aujourd’hui à chaque poste de travail de traiter de l’information grâce aux applications logicielles multiples : logiciels bureautiques, liés aux TICs, logiciels de gestion spécifiques. Les « technométhodes » forment au sein de chaque organisation un ensemble et une configuration (Elias, 1981 qui lui est propre et qui est liée à sa culture, son histoire et sa stratégie. Elles sont le fruit de pratiques collectives, d’adhésion, de résistance, voire de contournement du cadre imposé. Ces « technométhodes », résultats de processus historiques, ne sont pas neutres car le produit d’une interaction entre d’une part des choix managériaux et les logiques d’acteurs d’une organisation ». Nous nous appuierons sur une étude menée sur l’organisation d’un service d’une dizaine de salariés, appartenant à une institution d’aide et de conseil en matière de gestion de personnel territorial de l’ouest de la France. Cette étude sera l’occasion de faire émerger deux modèles culturels d’agents confrontés au changement organisationnel induit par ces « technométhodes » : les « alpinistes », agents les plus anciens, porteurs de savoirs d’expérience accumulés au fil des années, attachés à développer des relations affectives avec les clientèles et ancrés dans une culture « papier », développant par ce fait des « ethno-technométhodes » et des « parachutistes »1, agents dans l’ensemble plus jeunes ou aux parcours plus diversifiés, plus immergés dans la culture numérique, et cherchant à développer une approche plus technique des pratiques du service.This article presents the effects of what the author calls « technomethodologies », that is the structuring environment imposed to workers of an organization by the technologies, especially since the generalization of micro-informatics. These « technomethodologies » create a framework within an organization (Elias, 1981 which is related to the culture, history and strategy of the organization. They are the result of collective practices of adhesion, resistance or avoiding the imposed structure. These « technomethodologies » are the result of a historical process, are not neutral since they are the product of the interaction between managerial choices and the logic of actors of an organization. The article presents a case study of a service in the west of France and leads to highlight two models of agents confronted with organizational change : the « alpinists » and the « parachutists ».

  11. Fiscal policy in energy sector. Synthesis of talks at 22 March 1999 Session of DGEMP/CGP energy policy workshops; Fiscalite energetique. Synthese des interventions. Cycle de conferences de politique energetique DGEMP/CGP - Session du 22 mars 1999

    Energy Technology Data Exchange (ETDEWEB)

    Godard, Olivier [Directeur de Recherche, Centre National de la Recherche Scientifique CNRS, 75 - Paris (France)

    2000-02-18

    This document contains the Olivier Godard's synthesis of the discussions and talks given at the Session of 22 March 1999 of the cycle of lectures on energy policy organized by DGEMP/CGP (Direction Generale de l'Energie et des Matieres Premieres/Commissariat General du Plan) and the speech by Dominique Bureau, scientific councilor with the Economic Analysis Council of the Prime Minister. The energy tax policy may play a major role along with other instruments in the actions against the greenhouse effect. It could be an important lever of economic efficiency in the energy implication of the grand objectives. In this context, several extant provisions which have not or no longer economic justification should be re-examined. This is, for instance, the case of the differential taxation of diesel oil relative to the fuels Super, sill operative in France. Also, the lack of taxes on natural gas for domestic use, while the gas for industrial and electricity uses is taxed, or lack of coal taxation, in spite of their CO{sub 2} emissions, are in no way justifiable. As taxation of the FOL and FOD oil products, it should be multiplied at least by 3, to take into account solely the CO{sub 2} aspect and by 8 if the environmental effects are considered. Such tax augmentations could not be introduced in no time and accordingly methods are to be worked out and recommended to public authorities as to be incorporated as tools of their policy. Unfortunately, few of the actors participating in policy making are interested in the economic efficiency per se. Most of them are inclined to accept or reject a reform being guided solely by the capability or lack of capability of such a reform to solve the problems they are confronted with. Pleading for a reform based on only economic efficiency would be hardly attractive. In order to be more successful the reform should be conceived so that the most strategic actors to see in it a chance of improving their approach of their own problems. Hence, this is the political significance of the so-called 'double-return' policy which links the long-term preoccupations (planet climate) to more immediate preoccupations of our society (struggle against unemployment, sustainable growth, etc). In the talk by Dominique Bureau, concerning the struggle against greenhouse effect, one stresses that France is interested in taxing the energy as a tool for minimizing the costs. In presenting its policy to other European countries one should dismantle the concept that France is solely driven by its interest in protecting its exportation of electricity of nuclear origin. Finally, introduction of a CO{sub 2} or CO{sub 2} energy taxation should be approached by implying the externalities and avoiding any competition distortion. So, a fiscal approach should reflect in a general manner but moderately and progressively the taxation on fossil fuels aiming at the same time at lowering charges on low salaries. Hence, a integrated tax policy should be conducted both by preoccupation for climatic changes and avoidance of a over-taxation of non-qualified laborers.

  12. Measures and control: which mandatory regulations? which monitoring system to implement? what results to expect? which relations with the administration?; Mesures et controle: quelles obligations reglementaires? quel systeme de surveillance installer? quels resultats en attendre? quels rapports avec l`administration?

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-12-31

    This workshop is composed of 7 papers on air pollution monitoring and control related to combustion plants and systems: after a presentation of the regulatory framework (at the French and European levels) concerning air pollution and combustion systems, the mechanisms for a clean and efficient combustion are detailed, followed by measures for a quality combustion, pollution emission reduction techniques during combustion, air pollution monitoring and monitors for environment and pollution sources, quality assessment of monitoring systems, automatic monitoring and control of systems and relations with the administration

  13. Couches minces electrochromiques d'oxyde de tungstene dense et poreux pour des applications de controle energetique

    Science.gov (United States)

    Camirand, Hubert

    Nanotechnology has modified the landscape of energy generation, energy storage and energy saving devices. Architectural fenestration can extensively benefit from green nanotechnologies. Amongst them, active fenestration or "smart" windows are able to modify their coloration state upon the application of a small electrical voltage, when based on electrochromic materials. In fact, the amount of visible and near-infrared light that can penetrate through the window can be altered. Therefore, their implementation can allow for a significant reduction in energy consumption in buildings. Furthermore, the capability of optimizing indoor comfort is user-controlled, thus an additional degree of freedom is given by electrochromic-based technology. It is worth mentioning that such devices can be largely advantageous in countries with variable seasons, such as here in Canada. As a matter of fact, the large temperature difference between the hot and cold season influences the requirement of impeding or enabling visible and thermal radiation to pass through. This master's thesis is entirely devoted to tungsten trioxide (WO 3), which is the most widely studied electrochromic material. In the present case, WO3 thin films are synthesized by radiofrequency magnetron sputtering. By varying the deposition pressure and power, the porosity content/packing density of the films is modified. This work's main topic is the characterization of electrochromic samples by in situ spectroscopic ellipsometry simultaneously with the application of an electrical voltage in an aqueous electrolytic medium made of sulfuric acid (H2SO 4). The methodology developed here allows for an in-depth study of electro-active materials. To corroborate this, optical properties of WO3 are obtained for a wide range of coloration levels, and these are subsequently used to model the resulting coloration of electrochromic multilayer systems. However, the interface between the dense and porous films affects the coloration/bleaching dynamics. In this regard, interesting research avenues related to electrochromic interference filters are finally proposed.

  14. Energy engineering. Standardization in the domain of coldness production; Genie energetique. Normalisation dans le domaine du froid

    Energy Technology Data Exchange (ETDEWEB)

    Legent, N. [Association Francaise de Normalisation (AFNOR), 92 - Paris-la-Defense (France)

    2000-10-01

    This paper deals with the recent advances in the domain of standardization and regulation of refrigeration and cold production systems used in the industry and in the commercial sector: 1 - international standardization; 2 - European standardization; 3 - international standardization in the domain of cold production (ISO/TC 86 'coldness and air conditioning', CEI 61C 'domestic refrigerating appliances', CEI 61D 'air-conditioning appliances for domestic and similar use', ISO/TC 104 'goods transportation containers'); 4 - European standardization in the domain of cold production (CEN/TC 182 'refrigerating systems - safety and environment requirements', CEN/TC 44 'household refrigerating appliances and refrigerating furniture for stores', CEN/TC 113 'heat pumps and air-conditioners', CEN/TC 141 'manometers and thermometers, measuring and recording means', CENELEC 61 'safety of domestic electrical appliances'); 5 - French standardization (international file, European file, French file, French standardization system); 6 - national standardization in other countries; 7 - regulations in the domain of cold production. (J.S.)

  15. The contribution of economic theory to the energy debates; L'apport de la theorie economique aux debats energetiques

    Energy Technology Data Exchange (ETDEWEB)

    Percebois, J

    1999-11-01

    This paper proposes a brief overview of the contributions of the micro- and macro-economic theory to the answer of the following four main questions: 1 - how will change the world energy demand with respect to the economic activity and what will be the determining factors of this demand, globally and per energy source? What are the respective roles of energy prices and technological innovations? How will change the petroleum price and what will be the share of economical and political weight in this change? 2 - how passing on this price to the end-user taking into consideration the national preferences? Is there an optimum price when the energy producing, transporting and distributing company is a monopoly? 3 - what is the optimal structure of a network industry? 4 - how to integrate the local and global externalities characteristic of the energy sector in the economical calculus? (J.S.)

  16. Energy research 2004 - Overview; Recherche energetique / Energie-Forschung 2004. Rapport de synthese des chefs de programme / Ueberblicksberichte der Programmleiter

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-05-15

    This publication issued by the Swiss Federal Office of Energy (SFOE) presents an overview of advances made in energy research in Switzerland in 2004. In the report, the heads of various programmes present projects and summarise the results of research in four main areas: Efficient use of energy, renewable energies, nuclear energy and energy policy fundamentals. Energy-efficiency is illustrated by examples from the areas of building, traffic, electricity, ambient heat and combined heat and power, combustion, fuel cells and in the process engineering areas. In the renewable energy area, projects concerning solar heating and cooling, energy storage, photovoltaics, solar chemistry and hydrogen, biomass, small-scale hydro, geothermal energy and wind energy are presented. Work being done on nuclear safety and disposal regulations as well as controlled thermonuclear fusion are discussed.

  17. Fuel cell, an asset for the energy diversification; Pile a combustible, un atout pour la diversification energetique

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-01-18

    The fuel cell will provide in the future, the electric power of vehicles, houses or the portable phones. It presents many advantages as the environmental respect, the cost, the great autonomy. This paper deals with the CEA researches in the domain of the fuel cells development. (A.L.B.)

  18. Energies and raw materials, economic energy situation april 1998; Energies et matieres premieres, conjoncture energetique avril 1998

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-07-01

    Here is the economic energy situation in France in April 1998. The energy consumption, the evolution of the different energy sources are given. The energy invoice is decreasing with the fall of petroleum price. The imports and energy demand are studied. Energy data are given in tables, comparison between the months of January in the three years 1996, 1997,1998 for consumption, invoices, prices are reported in curves. (N.C.)

  19. The energy future in the world at the 21. century; L'avenir energetique mondial au 21. siecle

    Energy Technology Data Exchange (ETDEWEB)

    Frot, J

    2006-04-15

    After a presentation of the world context of the energy consumption (the growth, the petroleum and the natural gas last, the greenhouse effect gases impacts on the climate), and the today research and development domains in the energy sector (petroleum, gas, generation IV nuclear reactors, carbon sequestration, renewable energies, hydrogen, energy storage), the author examines, using 4 scenario, the margins of action, the energy efficiency, the Gross Domestic Product de-materialization and the costs. Then he discusses the hopes and problems in the domains of the transports and the carbon sequestration. A special attention is devoted to the energy efficiency importance. (A.L.B.)

  20. The energy diagnostic of the textile industry enterprise; Le diagnostic energetique d'une entreprise du secteur textile

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This document formalizes the reasoning of an energy diagnostic (optimization of the energy management and of the energy consumption) and illustrates it by the measures of energy conservation concerned. (A.L.B.)

  1. The renewable energies in the heart of the energy diversification; Les energies renouvelables au coeur de la diversification energetique

    Energy Technology Data Exchange (ETDEWEB)

    Antolini, A.; Chartier, Ph.; Saglio, A

    2002-06-01

    The renewable energies constitute a primordial part of the energy accounting of the future, taking into account the energy supply safety, the environmental quality and the local economic development. In this framework the authors present the stakes and the today data concerning the french and european situations of the renewable energies production, the development of the wind power and the solar energy and show the necessity of rapidly complete the today legislation of the french legal framework. (A.L.B.)

  2. The regional energy integration: the latin-american experiences; L'integration energetique regionale: les experiences latino-americaines

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    The ways of the regional economic integrations are not identical and generate different repercussions on the markets and the energy industries evolution. The example of the Latin America proposes many various experiences to evaluate the stakes and the limits of each regional integrations. These limits lead to solution researches including indisputable convergencies. The first part of this document presents the genesis of these regional economic integrations experiences in Latina America, to study in the second part the energy consequences of the liberal ALENA and of the more political MERCOSUR. (A.L.B.)

  3. A sustainable local energy policy. Into a renewable millennium; Politique energetique locale durable: vers un millenaire renouvelable

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    Renewable energy sources only contribute to a marginal extent to the energy balance of most European towns and cities. Many of them, however, have set ambitious targets for 2010 and have developed programmes to this end. During the seminar organised by Energie-Cites in Verona, around 200 people representing towns and cities from over 20 countries were able to present and exchange experience in all areas related to renewable energy: on practical projects and on their impact on local development, urban planning and employment. It is in towns and cities that energy consumption is the highest and that heat networks working on biomass and buildings equipped with thermal and photovoltaic solar collectors are to be found. Renewable energy has been increasingly gaining ground in urban areas over the last few years for the following reasons: cities are responsible for 80% of total energy consumption and therefore concentrate most of energy needs; the existence of heat networks in densely-populated areas is an incentive to use resources such as biomass or geothermal energy for producing heat or in CHP units; biogas from sewage plants or resulting from the biological treatment of waste is also an urban product; thermal solar systems can often be installed on roof tops to satisfy part of the needs in terms of hot water or space heating and the same applies to photovoltaic solar energy; even wind energy can be promoted, either directly or through green buying procedures. Sustainable urban development depends on the implementation of a sustainable local energy policy based on the involvement of local authorities in improving energy efficiency and developing the use of renewable energy sources in municipal energy supplies. Local development, employment, social integration, the quality of the air - all being major sources of concern for local decision-makers - are stimulated by the promotion of renewable energy sources. Cities are, on account of their size, capable of defining local promotional policies. Many of them, via their technical departments, municipal energy companies, local energy agencies, promotional resources etc. have the operational means to take action. These proceedings comprise: a presentation of three examples of municipal practice, two round tables about some communities 100% supplied with renewable energy, and about the liberalization of energy markets and the development of renewable energy, and 8 working groups about: renewable energy sources, local development, employment and social issues, renewable energy sources and urban planning, financing renewable energy policies, programmes for promoting renewable energy sources at local level, solar thermal, biomass and biogas, wind energy, and photovoltaic. (J.S.)

  4. Turning energy constraints into opportunities : the case of Morocco; Transformer la contrainte energetique en opportunites : le cas du Maroc

    Energy Technology Data Exchange (ETDEWEB)

    Haddouche, A.; Taoumi, M. [Centre for Developmental Research, Andhra Pradesh (India)

    2008-01-15

    Morocco's energy strategy was discussed. The country's energy needs are met primarily by imported coal and oil. In order to reduce the massive energy bill, the government has adopted a strategy that guarantees a sure supply of energy at the best possible cost. The strategy also ensures access to a competitive energy supply by the entire population. The development of a clean, renewable, efficient and diversified efficient energy supply also constitutes part of Morocco's national energy policy. This article noted that renewable energy can bring diversification and mobilization of local resources while preserving the environment. It can also contribute to creating a dynamic economy through investment and job creation. Currently, renewable energy constitutes 4 per cent of the national energy balance, excluding biomass. It constitutes 10 per cent of electricity production in the forms of hydroelectricity and wind powered turbines. Morocco's energy strategy aims to enhance the contribution of renewable energy to 10 per cent of the overall energy balance, and to 20 per cent of national electricity production by 2012. Beyond 2012, the energy sector is expected to receive new investment, the creation of 22,000 jobs, and a reduction in carbon emissions of nearly 18 million tons per year. The energy strategy includes windpower, solar power and biomass. 2 tabs., 3 figs.

  5. The internationalization of the technological activities in the energy industries; L'internationalisation des activites technologiques dans les industries energetiques

    Energy Technology Data Exchange (ETDEWEB)

    Bourgeois, B [Institut d' Economie et de Politique de l' Energie - IEPE-CNRS/ Universite Pierre Mendes-France, 38 - Grenoble (France); Jacquier-Roux, V [Institut de Recherche Economique sur la Production et le Developpement -IREPD, 38 - Grenoble (France)

    2001-06-01

    This analysis of the technological internationalization factors is defined in five chapters. The first chapter deals with the evolutionist representation of the internationalization process of the technological activities of the firms. The chapter two is an historical synthesis from 1985 to 2000, of the industrial dynamics and of the technological strategies of the petroleum and electric power industries. The chapter three details the empirical method used to verify the hypothesis. Chapter four exposes the data analysis results of the patents of the sampled firms. The last chapter is devoted to the results interpretation. (A.L.B.)

  6. Influence d'un ecran thermique sur le bilan energetique et le microclimat nocturnes d'une serre

    OpenAIRE

    Baille, M.; Laury, J.C.; Baille, Alain

    1984-01-01

    Dans cet article, on présente les résultats expérimentaux concernant les effets d’un écran thermique sur les déperditions énergétiques et le microclimat nocturnes de deux serres identiques, mais de matériaux de couverture différents : verre horticole ordinaire (V.O.) et verre à faible émissivité (V.F.E.). lorsque l’écran est déployé, on constate une diminution significative des pertes thermiques globales dans les deux serres. L’écran agit surtout au niveau des pertes par convection et par...

  7. Speaker's presentations. Energy supply security; Recueil des interventions. Securite d'approvisionnement energetique

    Energy Technology Data Exchange (ETDEWEB)

    Pierret, Ch

    2000-07-01

    This document is a collection of most of the papers used by the speakers of the European Seminar on Energy Supply Security organised in Paris (at the French Ministry of Economy, Finance and Industry) on 24 November 2000 by the General Direction of Energy and Raw Materials, in co-operation with the European Commission and the French Planning Office. About 250 attendees were present, including a lot of high level Civil Servants from the 15 European State members, and their questions have allowed to create a rich debate. It took place five days before the publication, on 29 November 2000, by the European Commission, of the Green Paper 'Towards a European Strategy for the Security of Energy Supply'. This French initiative, which took place within the framework of the European Presidency of the European Union, during the second half-year 2000. will bring a first impetus to the brainstorming launched by the Commission. (author)

  8. The energy supply of China. Markets and policies; L'approvisionnement energetique de la Chine. Marches et politiques

    Energy Technology Data Exchange (ETDEWEB)

    Noel, P. [Institut Francais des Relations Internationales, 75 - Paris (France); Meidan, M. [Inalco, 75 - Paris (France)

    2005-07-15

    China is a great part of the energy world economy. In 2003 and 2004, the chinese economic growth had a direct impact on the world energy markets: it is a main factor of the great world economic demand growth and the energy prices increase. In the other hand this growth generates new investment of energy offer in the world. The author details the China energy policy and its efficiency quest, the insertion in the gas markets and the petroleum market facing the chinese energy security. (A.L.B.)

  9. Energy vectors - Perennial guidebook for energy choices; Vecteurs d'energie - Guide perenne pour les choix energetiques

    Energy Technology Data Exchange (ETDEWEB)

    Caseau, P.; Ruelle, G.; Bacher, P.; Bamberger, Y.; Castillon, P.; Decomps, B.; Dhers, J.; Jarry, B.; Lefaudeux, F.; Mudry, F.; Saunier, B. [Academie des Technologies, Grand Palais des Champs Elysees - Porte C - Avenue Franklin D. Roosevelt - 75008 Paris (France); Careme, F.; Rogeaux, B. [EdF, 22-30, avenue de Wagram 75008 Paris (France); Choux, G. [Total, 2, place Jean Millier La Defense 6, 92400 Courbevoie (France); Morel, H. [CNRS, 3 Rue Michel-Ange, 75016 Paris (France)

    2011-11-17

    Energy vector means the distributed form of energy which is paid by the end-user: the automotive fuel at the gas station, the electricity at the plug. Vectors are characterized by two essential properties: they are structured in networks allowing a large access to users and a geographical and time adjustment of the demand thanks to transport and storage facilities. The link they create between sources and needs allows to introduce both upstream and downstream competitions (what usage is the most profitable? What source or vector is the most economical?). These two properties of vectors allow to use the economical and ecological competitions to help the decision-makers in the choice of the energy mix. This book explores these competitions with a double compass: ecological (greenhouse gases abatement) and economical (the less cost). The parametrical structure of the study allows to use it according to various hypotheses concerning the future evolution of energy source and CO{sub 2} prices. Therefore, it represents a perennial guidebook of energy choices. (J.S.)

  10. Territorial energy planning tools. Good practices of european towns; Les outils de planification energetique territoriale. Bonne pratiques de villes europeennes

    Energy Technology Data Exchange (ETDEWEB)

    Lacassagne, S.; Schilken, P.

    2003-07-01

    Some european towns developed a specific energy and environmental policy, function of many factors. Policies are implemented to favorite the energy consumption and the pollutant emission control. The actions of local collectivities in the domain have been analyzed following three axis: the measure of the energy performance of local collectivities, the territorial energy management tools, the energy integration in sectoral policies. This report takes stock on the second axis analysis. (A.L.B.)

  11. Renewable energies and energy choices. Summary of the colloquium; Energies renouvelables et choix energetiques. Compte rendu du colloque

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-05-01

    This document is an executive summary of the colloquium organized by the French syndicate of renewable energies (SER) which took place at the Maison de l'UNESCO in Paris during the national debate on energies organized by the French government in spring 2003. The colloquium was organized around 6 round tables dealing with: the world perspectives and the environmental context of the contribution of renewable energies to the sustainable development (respect of Kyoto protocol commitments, contribution to the security of energy supplies, lack of large scale program of development of decentralized power generation in developing countries, lack of market tools linked with CO{sub 2} emissions, improvement of competitiveness); development of renewable energies in Europe (promotion and sustain in all European countries, obligation of supply and purchase, pricing regulation, European harmonization of practices); renewable electricity and its place in the new orientation law about energies (tariff/pluri-annual investment planing, administrative authorizations, connections to the grid, calls for offer, costs of the photovoltaic solar energy); contribution of renewable energies in the transportation sector (bio-fuels, low taxes, ethanol fuel cells, vegetal chemistry); renewable heat and integration of renewable energy sources in buildings (intelligent architecture, promotion, quality labels and standards, lack of CO{sub 2} penalties linked with fossil fuels, tax reduction for solar and wood fuel appliances, acknowledgment of geothermal heat pumps as renewable energy source); and the presentation of the first proposals for the future orientation law (balance between nuclear and renewable energy sources, integration in the local environment, competitiveness, use of market mechanisms, R and D etc.). (J.S.)

  12. Energy evaluation for the year 2006 in France; Bilan energetique de l'annee 2006 de la France

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    This analysis of the energy french situation in 2006 presents the economical and energy context in the world and in France, the total primary energy consumption, the national production and the energy independence, the energy consumption for each energy type, the final energy consumption by sector, the energy intensity and the CO{sub 2} emissions resulting from the energy combustion. It appears that the final consumption increases lightly (0,6%) but with a sensitive decrease of the CO{sub 2} emissions from energy (-1,4%). (A.L.B.)

  13. Contribution to the european discussion on the energy strategy; Contribution au debat europeen sur la strategie energetique

    Energy Technology Data Exchange (ETDEWEB)

    Revol, H.; Valade, J

    2001-07-01

    If no change occurs, the European Union will cover in 2020, 70% of its energy need by importation, for 50% today. This situation leads to a discussion on the energy dependence. In this context the European Commission provoked a discussion by publishing a ''green book'' on the european strategy concerning the energy supply. This document presents the point of view of the Senate Energy Study Group. (A.L.B.)

  14. Renewable energies and energy choices. Summary of the colloquium; Energies renouvelables et choix energetiques. Compte rendu du colloque

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-05-01

    This document is an executive summary of the colloquium organized by the French syndicate of renewable energies (SER) which took place at the Maison de l'UNESCO in Paris during the national debate on energies organized by the French government in spring 2003. The colloquium was organized around 6 round tables dealing with: the world perspectives and the environmental context of the contribution of renewable energies to the sustainable development (respect of Kyoto protocol commitments, contribution to the security of energy supplies, lack of large scale program of development of decentralized power generation in developing countries, lack of market tools linked with CO{sub 2} emissions, improvement of competitiveness); development of renewable energies in Europe (promotion and sustain in all European countries, obligation of supply and purchase, pricing regulation, European harmonization of practices); renewable electricity and its place in the new orientation law about energies (tariff/pluri-annual investment planing, administrative authorizations, connections to the grid, calls for offer, costs of the photovoltaic solar energy); contribution of renewable energies in the transportation sector (bio-fuels, low taxes, ethanol fuel cells, vegetal chemistry); renewable heat and integration of renewable energy sources in buildings (intelligent architecture, promotion, quality labels and standards, lack of CO{sub 2} penalties linked with fossil fuels, tax reduction for solar and wood fuel appliances, acknowledgment of geothermal heat pumps as renewable energy source); and the presentation of the first proposals for the future orientation law (balance between nuclear and renewable energy sources, integration in the local environment, competitiveness, use of market mechanisms, R and D etc.). (J.S.)

  15. Energy forecasts for France. A scenario having a particular tendency; Perspectives energetiques pour la France. Un scenario tendanciel

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    This document presents in a synthetic form a description of the energy tendency ( supplies and demands) for 2010-2020. This description has been requested by the Direction of the Energy and the raw materials (DGEMP), from may to december 1999. The proposed scenario is based on a simulation and hypothesis which don't take into account the future policy and regulations as for example the decisions of the fight program against the climatic change. Tables and graphs are provided. (A.L.B.)

  16. The guide to sustainable energy technologies for schools; Un guide pour les technologies energetiques durables dans les ecoles

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    There are significant attractions for municipalities to opt for sustainable solutions which involve energy efficient technologies and measures. This is the challenging background which led to the production the Guide to Sustainable Energy Technologies for Schools. This guide is a decision-making tool intended for European municipalities and school managers. Its aim is to: assist them in choosing between the energy technologies that will be used in school building or retrofitting projects and provide them with a framework for measuring and comparing different aspects of energy performance that can be used to convince decision-makers to select sustainable energy technologies and measures. The guide is composed of three parts: an illustrative list of sustainable energy technologies, an introduction to energy performance indicators and fifteen case studies describing practical sustainable energy solutions applied to schools in seven European countries. (A.L.B.)

  17. Technical advances and energy substitutions in the transportation sector; Progres techniques et substitutions energetiques dans le secteur des transports

    Energy Technology Data Exchange (ETDEWEB)

    Tromenschlager-Philippe, F.

    2002-11-01

    Alternative motorization technologies have been proposed in order to achieve energy diversification and a reduction in pollutant emissions. Fuel cell vehicles are, among others, at the centre of research carried out by car manufacturers and oil companies. The use of fuel cell vehicles could contribute, first to a less stringent long-term energy dependence of oil importing countries and, second, to pollutant reduction in the transport sector. First of all, we propose the definition of 'innovation' and its treatment in the frame of mainstream economic theories. Then we proceed to a retrospective analysis of diesel motorization of the car market. In the second part of our work, we conduct a survey among French households aiming to obtain up-to-date information about their degree of acceptance of fuel cell technology. We are concerned about highlighting the determining factors of fuel cell vehicle adoption by consumers. For this, we set up a discrete choice model linking the individual decision to the whole group of technical or socio-economical factors and characteristics. Finally, we develop patterns of fuel cell equipment of passenger cars which differ according to type of vehicle and possible purchase assistance. These patterns lead us to the analysis of long-term fuel cell vehicle development on the French car market. (authors)

  18. Municipalities and opening up of energy markets; Les municipalites et l'ouverture des marches energetiques

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    The opening of energy markets in Europe is modifying deeply the general framework of economic activity, modes of organisation and ways of thinking. The energy future in Europe is being determined under the influence of Community directives relating to electricity and to gas. It is also being moulded by national legislation, which is being progressively put into place in different countries of the European Union and in other European countries such as those of central Europe. These will affect the conditions under which policies for energy efficiency, for the development of renewable energy and for combating climate change are to be implemented. The liberalization of energy markets is a new and highly significant element in the European energy scene and municipalities are making a constructive contribution to this process. About 160 representatives of municipalities from 19 different European countries met at the Energie-Cites Seminar in Barcelona in order to become better informed, to exchange opinions and to debate the consequences at their level of the opening of energy markets. As a consequence they have asked themselves questions and exchanged ideas in relation with their respective situations regarding energy planning, production, distribution, and the role of population motivative. The seminar is organized around one round table about the threats and the opportunities of the opening up of energy markets, and three sessions about: what is going to change for the municipality as energy consumer, what is going to change for the municipality as energy producer, distributor and regulator-developer, and what is going to change for the municipality as motivative. (J.S.)

  19. The contribution of economic theory to the energy debates; L'apport de la theorie economique aux debats energetiques

    Energy Technology Data Exchange (ETDEWEB)

    Percebois, J.

    1999-11-01

    This paper proposes a brief overview of the contributions of the micro- and macro-economic theory to the answer of the following four main questions: 1 - how will change the world energy demand with respect to the economic activity and what will be the determining factors of this demand, globally and per energy source? What are the respective roles of energy prices and technological innovations? How will change the petroleum price and what will be the share of economical and political weight in this change? 2 - how passing on this price to the end-user taking into consideration the national preferences? Is there an optimum price when the energy producing, transporting and distributing company is a monopoly? 3 - what is the optimal structure of a network industry? 4 - how to integrate the local and global externalities characteristic of the energy sector in the economical calculus? (J.S.)

  20. DGEMP-OE (2008) Energy Baseline Scenario. Synthesis report; Scenario energetique de reference DGEMP-OE(2008). Rapport de synthese

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    A 'Business as usual' or 'Baseline' scenario of energy trends to 2020-2030 is produced by France every four years, as requested by the International Energy Agency in order to update the global scenarios published in its World Energy Outlook. Since the most recent scenario of this type was drawn up in 2003-2004, the time has come to renew the effort for the IEA's next in-depth review of French energy policy. Specifically, the DGEMP seeks to predict the future of France's energy situation assuming that no policies or new measures are taken affecting (i.e. improving or deteriorating) the situation other than those already in place or adopted as of 1 January 2008 (in other words, before measures such as those stemming from the Grenelle Environment Forum). On the other hand, it is assumed that change in the energy system is guided by 'conventional wisdom' according to which political options and behaviours by economic units are expected to be 'reasonable'. As a result, even should its projections prove inappropriate, this cannot be considered a 'worst-case' scenario. Indeed, beyond the IEA, this scenario can be used to establish an MEA (Multilateral Environment Agreement) scenario (based on existing measures) for national communications submitted under the U.N. Climate Convention. The scenarios by the 'Energy' Commission, part of the Centre d'Analyse Strategique (CAS), could have been used, particularly since the consultant who worked with the CAS to develop its scenarios was also commissioned by the DGEMP. However, several considerations argued in favour of proceeding separately: - The CAS scenarios drew on the DGEMP's 2004 baseline scenario, even though certain parameters were updated (in particular energy prices). - Moreover, the concept underpinning the DGEMP baseline scenario is that it should to every extent possible remain constant over time to secure continued consensus on this 'reference' at national level. - Finally, the MEDEE energy demand model applied in the CAS scenarios relies primarily on 2000 data, despite the existence of sufficiently complete statistics through to 2005. The DGEMP on the other hand used a study by the BIPE (Office for Economic Information and Forecasting) provided by the SESP, the Ministry for Ecology, Energy, Sustainable Development and Spatial Planning's economic statistics and forecasting department. On the basis of the study's macro-economic projections of the French economy to 2020, the DGEMP was able to re-evaluate the prospects for activity in the industrial and tertiary sectors. In several respects (e.g. supply security, CO{sub 2} emissions, energy efficiency), the baseline scenario proposed here is clearly not a scenario conducive to satisfying French energy policy objectives. This is not a surprising conclusion in that it implies the need to implement new policies and measures in addition to those already in place or approved. In particular, this scenario would lead to importing 66 billion cubic meters of gas (59 Mtoe) in 2020 and 78 billion cubic meters (70 Mtoe) in 2030, compared with the present 44 billion cubic meters. In addition to the resulting CO{sub 2} emissions, the near doubling of gas imports would pose a twofold problem as to the geographic origin of the gas imported (under appropriate supply contracts) and the infrastructure (LNG terminals, gas pipelines) required to transport it. Finally, the baseline scenario is of course a long way from achieving the Community targets, whether for CO{sub 2} emissions, projected to rise continually until 2020 and then even faster until 2030 (due to transport and electric power generation), or for the share of renewable energy in the energy mix. In that regard, the share of renewable energy in 'enlarged' final energy consumption, as it is described in the 'energy and climate change package', would grow to 13.4% in 2020 (versus 23% in the Commission's burden sharing proposal) and to 13.7% in 2030, compared with the 10.3% share observed in 2006.

  1. Energy security and European Union. Proposals for the French presidency; Securite energetique et Union Europeenne. Propositions pour la presidence francaise

    Energy Technology Data Exchange (ETDEWEB)

    Mandil, C

    2008-04-15

    This report treats of energy security and of the two related topics which are the fight against climatic change and the economic growth. The first chapter analyses the energy risks that we will have to face. It makes a difference between the long-term risks (depletion of energy resources) and the short-term risks (supply disruption). Concerning the short-term risks, it is recalled that most of the supply incidents have an internal cause and that imports can have advantages and not only drawbacks. The second chapter approaches the delicate problem of European harmonization between the speech and the action when the energy security is in concern. A conclusion of this chapter is that the 'speaking with a single voice' goal can be reached only if improvements are made in the domain of solidarity between member states. The completion of the internal energy market is therefore a priority and the mission of regulators must include the security aspect. The third chapter treats of the particular case of the relation with the Russian supplier. It suggests to work for a lower energy dependence with respect to Russia, by developing the energy efficiency, the LNG industry, the renewable energies and the nuclear energy. The fourth chapter deals with the relations with the Caspian sea surrounding countries in the perspective of gas exports towards Europe. Here again, the cooperation with Russia is of prime importance. It approaches also the problem of the gas negotiation with Turkey which requires a significant improvement of the consistency of European diplomacy in this area. The last chapter treats of the role of international organisations and of the dialogue in the domain of energy. It suggests some paths to develop the confidence between the different intervening parties. It stresses on the lack of transparency which disturbs the markets and weakens the security. (J.S.)

  2. Plenary session 1: the evolution of the worldwide energetic scenery; Pleniere 1: L'evolution du paysage energetique mondial

    Energy Technology Data Exchange (ETDEWEB)

    Chevallier, B.

    2011-12-15

    This article gives the main events of the year 2011 and summaries of speeches concerning the new energy geopolitical scenery, Macondo and Fukushima: what are the challenges for the industry and for the Total firm, and natural gas: is it the energy of the 21. century. (O.M.)

  3. Hortisol - Including energetic considerations into greenhouse cultivation; Hortisol - Integration des processus energetiques dans les cultures sous abris

    Energy Technology Data Exchange (ETDEWEB)

    Bonvin, M.; Morand, G.; Reist, A.

    2005-07-01

    The goal of the project is to optimize the utilization of the energetic and financial resources required for the commercial production of biomass in greenhouses though the development of a suitable computer simulation program. In a first step, the existing literature on the subject has been collected and reviewed with special emphasis on the culture of tomatoes. The main influencing parameters are: the temperature within the greenhouse and its time variations, the magnitude and the dynamics of thermal energy flows, the concentration of carbon dioxide, the lighting (natural and artificial), and the relative humidity. Considering all factors, a mathematical model has been worked out that quantifies all energy transfers through the outer surface of the greenhouse. A first version of a computer simulation program for the planning and operation of a greenhouse cultivating tomatoes has been developed. It shall be validated and refined in the forthcoming year (2006)

  4. Hortisol - Integration of energy-processes in greenhouses; Hortisol - Integration des processus energetiques dans les cultures sous abris

    Energy Technology Data Exchange (ETDEWEB)

    Bonvin, M.; Morand, G. [Haute Ecole valaisanne, Sion (Switzerland); Reist, A. [Antoine Reist, Vetroz (Switzerland)

    2006-07-01

    This final report published by the Swiss Federal Office of Energy (SFOE) takes a look at Hortisol - a simulation aid for growers of tomatoes. This simulation aid not only takes various energy aspects such as heat, humidity, carbon dioxide and artificial light into account, but also the agricultural aspects of tomato cultures. The paper describes how planners can use the tool to simulate various situations and their effects on the growing of tomatoes and on the amount of energy used. The models and rules used in the simulation are presented. The structure of the simulation software and its validation are discussed. Appendices present the theoretical basis of the tool and screen-shots.

  5. Energy choices under environmental controversy: the French biofuels case; Controverse environnemental et choix de filieres energetiques: les biocarburants en France

    Energy Technology Data Exchange (ETDEWEB)

    Fallot, A.

    2003-07-01

    In France, the persistence of biofuels at an experimental or pre-industrial stage, hangs on measures that were taken on the account of environmental policy in the energy sector. Our recent and thorough case study has resulted in the statement that biofuels do not offer the prospects for enough profitability to any economic agent - neither biomass providers nor energeticists - that would justify the investments necessary to reach large scale production. A real biofuel 'file' is not viable in a context where fossil energies dominate, nor in a context where the complete taking into account of environmental variables would have defeated the ''technological lock-in'' that nowadays excludes no-carbon technologies. We look for an explanation of the continuing public support to biofuels in the present peculiar context, where new measures of environmental policy are being decided in the energy sector without any agreement on the importance of environmental and other long term issues. For that matter, we propose a simple option value model, where both issues of irreversibility and uncertainty are tackled. (author)

  6. The regional energy integration: the latin-american experiences; L'integration energetique regionale: les experiences latino-americaines

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    The ways of the regional economic integrations are not identical and generate different repercussions on the markets and the energy industries evolution. The example of the Latin America proposes many various experiences to evaluate the stakes and the limits of each regional integrations. These limits lead to solution researches including indisputable convergencies. The first part of this document presents the genesis of these regional economic integrations experiences in Latina America, to study in the second part the energy consequences of the liberal ALENA and of the more political MERCOSUR. (A.L.B.)

  7. Techno-economic optimisation of energy systems; Contribution a l'optimisation technico-economique de systemes energetiques

    Energy Technology Data Exchange (ETDEWEB)

    Mansilla Pellen, Ch

    2006-07-15

    The traditional approach currently used to assess the economic interest of energy systems is based on a defined flow-sheet. Some studies have shown that the flow-sheets corresponding to the best thermodynamic efficiencies do not necessarily lead to the best production costs. A method called techno-economic optimisation was proposed. This method aims at minimising the production cost of a given energy system, including both investment and operating costs. It was implemented using genetic algorithms. This approach was compared to the heat integration method on two different examples, thus validating its interest. Techno-economic optimisation was then applied to different energy systems dealing with hydrogen as well as electricity production. (author)

  8. Nouvelle methode d'integration energetique pour la retro-installation des procedes industriels et la transformation des usines papetieres

    Science.gov (United States)

    Bonhivers, Jean-Christophe

    The increase in production of goods over the last decades has led to the need for improving the management of natural resources management and the efficiency of processes. As a consequence, heat integration methods for industry have been developed. These have been successful for the design of new plants: the integration principles are largely employed, and energy intensity has dramatically decreased in many processes. Although progress has also been achieved in integration methods for retrofit, these methods still need further conceptual development. Furthermore, methodological difficulties increase when trying to retrofit heat exchange networks that are closely interrelated to water networks, such as the case of pulp and paper mills. The pulp and paper industry seeks to increase its profitability by reducing production costs and optimizing supply chains. Recent process developments in forestry biorefining give this industry the opportunity for diversification into bio-products, increasing potential profit margins, and at the same time modernizing its energy systems. Identification of energy strategies for a mill in a changing environment, including the possibility of adding a biorefinery process on the industrial site, requires better integration methods for retrofit situations. The objective of this thesis is to develop an energy integration method for the retrofit of industrial systems and the transformation of pulp and paper mills, ant to demonstrate the method in case studies. Energy is conserved and degraded in a process. Heat can be converted into electricity, stored as chemical energy, or rejected to the environment. A systematic analysis of successive degradations of energy between the hot utilities until the environment, through process operations and existing heat exchangers, is essential in order to reduce the heat consumption. In this thesis, the "Bridge Method" for energy integration by heat exchanger network retrofit has been developed. This method is the first that considers the analysis of these degradations. The fundamental mechanism to reduce the heat consumption in an existing network has been made explicit; it is the basis of the developed method. The Bridge Method includes the definition of "a bridge", which is a set of modifications leading to heat reduction in a heat exchanger network. It is proven that, for a given set of streams, only bridges can lead to heat savings. The Bridge Method also includes (1) a global procedure for heat exchanger network retrofit, (2) a procedure to enumerate systematically the bridges, (3) "a network table" to easily evaluate them, and (4) an "energy transfer diagram" showing the effect of the two first principles of thermodynamics of energy conservation and degradation in industrial processes in order to identify energy savings opportunities. The Bridge Method can be used for the analysis of networks including several types of heat transfer, and site-wide analysis. The Bridge Method has been applied in case studies for retrofitting networks composed of indirect-contact heat exchangers, including the network of a kraft pulp mill, and also networks of direct-contact heat exchangers, including the hot water production system of a pulp mill. The method has finally been applied for the evaluation of a biorefinery process, alone or hosted in a kraft pulp mill. Results show that the use of the method significantly reduces the search space and leads to identification of the relevant solutions. The necessity of a bridge to reduce the inputs and outputs of a process is a consequence of the two first thermodynamics principles of energy conservation and increase in entropy. The concept of bridge alone can also be used as a tool for process analysis, and in numerical optimization-based approaches for energy integration.

  9. Gazprom, the Fastest Way to Energy Suicide; Gazprom: mode d'emploi pour un suicide energetique

    Energy Technology Data Exchange (ETDEWEB)

    Paillard, Ch.A.

    2007-07-01

    Russia is an unavoidable actor in world energy geopolitics. It is also the biggest energy partner of a European Union (EU) that is becoming ever more dependent on outside sources for its energy needs. However, the future of Russia's largest company - Gazprom - and the development of its future production capacities are at the center of a complex financial and political game dominated by numerous uncertainties, including Gazprom's actual reserves, its ability to invest in exploration and production, and its very capacity to develop production. Indeed, back in state hands, Russian gas and oil companies - Gazprom included - do not appear to be in a position to meet their future production commitments. Gazprom's ability to honor its contracts with gas companies in the EU is in fact already the subject of numerous interrogations. (author)

  10. Le grand livre de l'égalité femmes-hommes réfléchir autrement : agir pleinement

    CERN Document Server

    Pascal, V

    2016-01-01

    Faut-il attendre 100 ans pour vivre l'égalité pleine et entière entre les femmes et les hommes ? L'égalité femmes - hommes est un sujet Humain, d'hier, d'aujourd'hui et de demain. Les inégalités persistent, des solutions existent ! Quel que soit votre sexe, votre âge, votre statut, votre métier, votre culture... vous pouvez devenir acteur de ce changement. Valérie Pascal et Catherine Sexton vous invitent à : Réfléchir autrement sur les enjeux de l'égalité femmes - hommes. Ce livre vous donne un panorama sur l'évolution des droits des femmes et des lois en matière d'égalité. Il vous fait découvrir les multiples visions sur le genre, principalement sociales et scientifiques, et apporte des clés pour agir sur les stéréotypes inconscients, facteurs de sexisme. Agir pleinement : quatre leviers peuvent être activés simultanément : Les solutions légales et citoyennes. La gouvernance et la culture d'entreprise. Le développement de l'intelligence individuelle. Le renforcement de l'intellige...

  11. De l’étiquette à la marque : la labellisation comme unificateur des projets territoriaux ?

    Directory of Open Access Journals (Sweden)

    Valia Filloz

    2011-05-01

    Full Text Available La labellisation, le label et l’évolution du label dans les domaines culturel et touristique offrent autant de laboratoires pour saisir les discours et les pratiques singulières du développement durable sur les territoires. Ils impulsent des pratiques qui se diffusent allant jusqu’à faire norme, voire certification ou marque. Le label distingue et qualifie un territoire. Dans cet article, nous examinons la manière dont les liens entre tourisme, culture et territoire se sont construits, comment la notion de développement durable a pris forme dans les textes de cadrage (enjeux et objectifs pour le tourisme et la culture, pour voir enfin par quels processus les labels, à partir d’un échantillon représentatif, mettent en place concrètement un nouvel ordre d’interdépendance, propre au développement durable, sur le territoire.Labelling, label and label evolution in cultural and touristic domains offer many laboratories to seize the speeches and the singular practices of sustainable development on territories. They impulse practices which spread until becoming standard, certification or brand. Label distinguishes and qualifies a territory. We examine how links between tourism, culture and territory built themselves, how the notion of sustainable development took shape in the framework texts (stakes and targets about tourism and culture, to see finally which processes, from a representative sample, lead labels to set up concretely a new interdependence order on sustainable territories.

  12. Science, technologie, nature et humain ont rendez-vous au jardin

    Directory of Open Access Journals (Sweden)

    Dargent Olivier

    2015-01-01

    Full Text Available Un jardin expérimental est un espace riche en activités pédagogiques pour les élèves. Il recueille, à priori, naturellement, l’adhésion de chacun, élèves, équipe éducative et parents. Il est enfin une occasion d’avoir une approche différente de celle de la classe, les élèves étant confrontés au vivant dans son environnement. Lors de ces activités proposées dans ce contexte, leur rapport au vivant est directement confronté à la réalité. Quels sont les enjeux didactiques d’une pédagogie axée autour d’activités au jardin expérimental ? A partir de deux activités ; un « totem à insectes » et un « nichoir connecté ». La confrontation du vivant et de leur représentation est analysée.

  13. Life scientists in the nuclear domain

    International Nuclear Information System (INIS)

    Guetat, Philippe; Egal, Yves; Wolf, Gerard; Fleuriot, Sabine; Van Hecke, Walter; Coulon, Remi; Seilhean-Frossard, Estelle; Sevin, Helene; Schoulz, Daniel; Lebaron-Jacobs, Laurence; Menetrier, Florence; Crochon, Philippe; Buchholzer, Vincent; Chagvardieff, Pierre; Camus, Henri; Raynaud, Jacques; Biet, Elodie; Mathis, Paul

    2011-01-01

    This dossier is made of several small articles entitled: - 'Exploite intelligemment, le nucleaire n'est pas dangereux' (Exploited smartly, nuclear is not dangerous); - 'l'amont du cycle du combustible nucleaire' (the upstream part of the nuclear fuel cycle); - 'Le nucleaire, une energie recyclable' (Nuclear, a recyclable energy); - 'Centrale nucleaire et environnement - exemple de Cattenom' (Nuclear power station and the environment - the example of Cattenom); - 'Ingenieur environnement, un metier exigeant' (Engineer in environment, a demanding profession); - 'Rayonnements ionisants: a quels risques sommes-nous exposes?' (Ionizing radiations: to which risks are we exposed?); - 'Les anciennes mines d'uranium, un sujet toujours d'actualite' (Old uranium mines: a topic always of actuality); - 'Les dechets nucleaires, des dechets comme les autres?' (Nuclear wastes: wastes like others?); - 'Les Ingenieurs du Vivant dans le nucleaire' (Engineers in life sciences in the nuclear sector); - 'Tchernobyl: 25 ans apres, quel impact sur la sante?' (Chernobyl: 25 years after: which impact on health?); - 'Fukushima, catastrophe naturelle ou accident nucleaire?' (Fukushima, natural disaster or nuclear accident?); - 'Rehabiliter les sols contamines' (Restoring contaminated soils); - 'Nucleaire et risque de proliferation' (nuclear and risk of proliferation); - 'Les rayonnements dans la lutte contre le cancer' (Radiations in the struggle against cancer); - 'L'energie nucleaire est-elle essentielle a notre bouquet energetique?' (Is nuclear energy essential to our energy mix?). The articles of this dossier outline that nuclear energy can be exploited without any danger if it is done intelligently, describes the upstream part of the nuclear fuel cycle, outlines that most of the nuclear fuel can be recycled, presents the activities of survey and control of the environment around a French nuclear power station, outlines the high commitment required for and engineer in environment working

  14. Capture and geological storage of CO{sub 2}. Innovation, industrial stakes and realizations; Captage et stockage geologique du CO{sub 2}. Innovation, enjeux industriels et realisations

    Energy Technology Data Exchange (ETDEWEB)

    Lavergne, R.; Podkanski, J.; Rohner, H.; Otter, N.; Swift, J.; Dance, T.; Vesseron, Ph.; Reich, J.P.; Reynen, B.; Wright, L.; Marliave, L. de; Stromberg, L.; Aimard, N.; Wendel, H.; Erdol, E.; Dino, R.; Renzenbrink, W.; Birat, J.P.; Czernichowski-Lauriol, I.; Christensen, N.P.; Le Thiez, P.; Paelinck, Ph.; David, M.; Pappalardo, M.; Moisan, F.; Marston, Ph.; Law, M.; Zakkour, P.; Singer, St.; Philippe, Th.; Philippe, Th

    2007-07-01

    The awareness of the international community and the convergence of scientific data about the global warming confirm the urgency of implementing greenhouse gases abatement technologies at the world scale. The growth of world energy demand will not allow to rapidly get rid of the use of fossil fuels which are the main sources of greenhouse gases. Therefore, the capture and disposal of CO{sub 2} is a promising way to conciliate the use of fossil fuels and the abatement of pollutants responsible for the global warming. The economical and industrial stakes of this technique are enormous. In front of the success of a first international colloquium on this topic held in Paris in 2005, the IFP, the BRGM and the Ademe have jointly organized a second colloquium in October 2007, in particular to present the first experience feedbacks of several pilot experiments all over the world. This document gathers the transparencies of 27 presentations given at this colloquium and dealing with: the 4. IPCC report on the stakes of CO{sub 2} capture and storage; the factor 4: how to organize the French economy transition from now to 2050; the technology perspectives, scenarios and strategies up to 2050; the European technological platform on 'zero-emission thermal plants'; the CO{sub 2} capture and storage road-map in the USA; research, development and implementation of CO{sub 2} capture and storage in Australia; the Canadian experience; ten years of CO{sub 2} capture and storage in Norway; the In Salah operations (Algeria); CO{sub 2} capture and storage: from vision to realisation; the oxi-combustion and storage pilot unit of Lacq (France); the Altmark gas field (Germany): analysis of CO{sub 2} capture and storage potentialities in the framework of a gas assisted recovery project; oil assisted recovery and CO{sub 2} related storage activities in Brazil: the Buracica and Miranga fields experience; carbon capture and storage, an option for coal power generation; steel-making industries and their CO{sub 2} capture and storage needs: the ULCOS program; CO{sub 2} capture technologies: road-maps and potential cost abatement; membranes: oxygen production and hydrogen separation; CO2GeoNet: integration of European research for the establishment of confidence in CO{sub 2} geologic storage; CO2SINK, CO{sub 2} geologic storage test at the European pilot site of Ketzin (Germany); storage in aquifers for European industrial projects: AQUA CO2; the US approach: US standards for the qualification of a CO{sub 2} storage in agreement with federal and state regulations; legal and regulatory aspects; societal acceptation; CO{sub 2} capture, geologic storage and carbon market; economic aspects of CO{sub 2} capture and storage; an experience of implementation of 'clean development mechanisms' in an industrial strategy; closing talk. (J.S.)

  15. Les peintres d’Empédocle (DK 31 B23) : enjeux et portée d’une analogie préplatonicienne

    NARCIS (Netherlands)

    Iribarren, Baralt L.

    2015-01-01

    This paper focuses on Empedocles’ fragment B23, in which the author analogically relates the generation of living species from four elements to the art of painting, whose productions result from the mixing of a limited number of pigments. The first part of the article deals with the heuristic

  16. Compétences interactionnelles et métier de service en restauration : les enjeux méthodologiques d’un corpus complexe

    Directory of Open Access Journals (Sweden)

    Alcade-Lebrun Céline

    2015-01-01

    Full Text Available Notre contribution aborde la problématique méthodologique des choix effectués déterminant les modalités d’approche du terrain et de recueil de données. Dans un premier temps, nous replaçons notre étude dans le triple contexte, scientifique, éducatif, et professionnel, qui en a fait émerger son impérativité, ainsi que les partenaires qui en ont été à l’origine et les objectifs qui lui ont été assignés. Nous envisageons ensuite les contraintes et spécificités auxquelles nous avons été confrontée dans notre démarche de constitution de corpus pour mener à bien notre recherche, et développons les caractéristiques originales sur lesquelles est basé le dispositif de recueil de données hétérogènes adopté, en mettant en lumière les choix auxquels il a répondu, les questions éthiques et méthodologiques que ce dispositif a générées, et l’exploitation de données qu’il a permis de réaliser. Dans un troisième temps, nous explicitons de quelle manière, en plusieurs étapes successives et sur le long terme, le processus de production de données a fait évoluer notre questionnement de recherche dans la perspective de nos objectifs d’étude. Cette analyse nous permet finalement de considérer la question de l’articulation et du traitement des différents types de données en faveur d’une cohérence globale de notre étude.

  17. Espaces, formes et enjeux identitaires dans Les petits-fils nègres de Vercingétorix de A. Mabanckou

    Directory of Open Access Journals (Sweden)

    Katrien Snoeck

    2017-02-01

    Full Text Available Dans l’œuvre romanesque de A. Mabanckou, le roman Les petits-fils nègres de Vercingétorix occupe une place particulière. Avec sobriété, l’auteur guide la plume de son héroïne, Hortense Iloki, pour peindre la violence aveugle à laquelle les hommes de son pays, le Viétongo, en proie à leurs démons identitaires, se livrent sans retenue. Tandis que la guerre civile fait rage, les femmes résistent à la haine tribale, s’organisent même pour témoigner de l’horreur dont elles sont les premières victimes. Viétongo ou Congo ? Ce qui se veut fictionnel rejoint la brutale réalité de la guerre civile de 1997 au Congo Brazzaville. En dénonçant l’instrumentalisation de questions identitaires par des hommes politiques africains à des fins personnelles, ce roman inscrit son auteur parmi les grands romanciers engagés de la sous-région.

  18. Information and analysis document. Hydrocarbons of the Caspian sea: actors and stakes; Dossier d'information et d'analyse. Les hydrocarbures de mer Caspienne: acteurs et enjeux

    Energy Technology Data Exchange (ETDEWEB)

    Noel, P

    1998-03-01

    The Caspian sea basin constitutes an important petroleum reserve from which the exploration and development just begin. It should provide near 5 % of the world petroleum offer in 2015. To evaluate the stakes of the situation, the author presents an analysis of the Caspian sea reserves in three main parts: the Caspian sea hydrocarbons and the energy geo-politics, the realizations and the projects of the transport infrastructures, the international participations in the main petroleum and gaseous contracts. (A.L.B.)

  19. LA MAITRISE DE LA DEMANDE EN EAU ET EN ENERGIE EN AGRICULTURE IRRIGUEE : DE L'EVALUATION DES ENJEUX A LA PROPOSITION D'ACTIONS CIBLEES

    OpenAIRE

    Goossens , Xavier

    2005-01-01

    Financement : Bourse ADEME; This work relies on field studies from Morocco, France, Egypt and India. Its purpose is to build an approach with a high capacity for preparation to field action. Food flows of energy, water and commercial energy implied in the irrigated agricultural production and feeding systems are evaluated using and combining constraints, functions and objectives of the studied systems. The approach uses knowledge and data from the nutrition and food fields, irrigated agricult...

  20. Capture and geological storage of CO{sub 2}. Innovation, industrial stakes and realizations; Captage et stockage geologique du CO{sub 2}. Innovation, enjeux industriels et realisations

    Energy Technology Data Exchange (ETDEWEB)

    Lavergne, R; Podkanski, J; Rohner, H; Otter, N; Swift, J; Dance, T; Vesseron, Ph; Reich, J P; Reynen, B; Wright, L; Marliave, L de; Stromberg, L; Aimard, N; Wendel, H; Erdol, E; Dino, R; Renzenbrink, W; Birat, J P; Czernichowski-Lauriol, I; Christensen, N P; Le Thiez, P; Paelinck, Ph; David, M; Pappalardo, M; Moisan, F; Marston, Ph; Law, M; Zakkour, P; Singer, St; Philippe, Th; Philippe, Th

    2007-07-01

    The awareness of the international community and the convergence of scientific data about the global warming confirm the urgency of implementing greenhouse gases abatement technologies at the world scale. The growth of world energy demand will not allow to rapidly get rid of the use of fossil fuels which are the main sources of greenhouse gases. Therefore, the capture and disposal of CO{sub 2} is a promising way to conciliate the use of fossil fuels and the abatement of pollutants responsible for the global warming. The economical and industrial stakes of this technique are enormous. In front of the success of a first international colloquium on this topic held in Paris in 2005, the IFP, the BRGM and the Ademe have jointly organized a second colloquium in October 2007, in particular to present the first experience feedbacks of several pilot experiments all over the world. This document gathers the transparencies of 27 presentations given at this colloquium and dealing with: the 4. IPCC report on the stakes of CO{sub 2} capture and storage; the factor 4: how to organize the French economy transition from now to 2050; the technology perspectives, scenarios and strategies up to 2050; the European technological platform on 'zero-emission thermal plants'; the CO{sub 2} capture and storage road-map in the USA; research, development and implementation of CO{sub 2} capture and storage in Australia; the Canadian experience; ten years of CO{sub 2} capture and storage in Norway; the In Salah operations (Algeria); CO{sub 2} capture and storage: from vision to realisation; the oxi-combustion and storage pilot unit of Lacq (France); the Altmark gas field (Germany): analysis of CO{sub 2} capture and storage potentialities in the framework of a gas assisted recovery project; oil assisted recovery and CO{sub 2} related storage activities in Brazil: the Buracica and Miranga fields experience; carbon capture and storage, an option for coal power generation; steel-making industries and their CO{sub 2} capture and storage needs: the ULCOS program; CO{sub 2} capture technologies: road-maps and potential cost abatement; membranes: oxygen production and hydrogen separation; CO2GeoNet: integration of European research for the establishment of confidence in CO{sub 2} geologic storage; CO2SINK, CO{sub 2} geologic storage test at the European pilot site of Ketzin (Germany); storage in aquifers for European industrial projects: AQUA CO2; the US approach: US standards for the qualification of a CO{sub 2} storage in agreement with federal and state regulations; legal and regulatory aspects; societal acceptation; CO{sub 2} capture, geologic storage and carbon market; economic aspects of CO{sub 2} capture and storage; an experience of implementation of 'clean development mechanisms' in an industrial strategy; closing talk. (J.S.)

  1. Les improvisations financière de la guerre de 1914-1918 en France. Les enjeux de la liquidité.

    OpenAIRE

    Bertrand BLANCHETON

    2014-01-01

    Cet article met en exergue les improvisations dans la gestion financière de la guerre. Le choix d’un moratoire des dépôts bancaires au détriment du réescompte traduit un refus de faire jouer à la Banque de France un rôle de préteur en dernier ressort. Le choix précipité de privilégier la dette flottante pose les bases d’une perte de contrôle du marché monétaire par les autorités monétaires françaises. L’article questionne le rapport des contemporains avec la liquidité.

  2. 2. Le théâtre en révolution. Jeux et enjeux juridiques et politiques 1789–1799

    Directory of Open Access Journals (Sweden)

    Jahiel Ruffier-Méray

    2017-08-01

    Full Text Available Cette étude porte sur la manière dont le pouvoir politique a tenté d’instrumentaliser le théâtre et examine les différents moyens juridiques utilisés pour transformer l’art théâtral en outil de propagande durant la période révolutionnaire. Durant tout l’Ancien Régime, le système des spectacles privilégiés règne en maître. En plaçant certaines troupes en situation de monopole, l’État fait le choix d’une politique de régulation des salles. Quant à la surveillance des divertissements, elle est assurée à la fois par la police des spectacles et par la censure. En 1789, avec l’abolition des privilèges, les révolutionnaires remettent en cause tout ce système. Inévitablement, ils sont obligés de s’interroger sur les politiques à mener en matière théâtrale et de repenser les modalités de l’offre artistique. Le théâtre apparaît, dès lors, comme un enjeu majeur situé au cœur des préoccupations révolutionnaires. L’art dramatique concentre à lui seul, toutes les questions débattues avec passion à l’Assemblée.

  3. The 'renewable' stakes of the national debate on energies; Les enjeux ''renouvelables'' du debat national sur les energies

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    Renewable energies do not produce any additional greenhouse gas emissions and do not leed to the production of dangerous wastes. The facilities used for their valorization are easily dismantled at the end of their life, and they offer many advantages in terms of employment, local economy, decentralization and national development. Their main drawbacks concern the required land surfaces and the intermittency of their availability. This paper analyzes the feasibility and the medium- and long-term perspectives of development of renewable energies in France and in Europe: costs and conditions (decentralized production, public acceptability, competitiveness, investments, operating costs, international cooperation). (J.S.)

  4. Savoir donner : les enjeux d’une définition scolaire de la philanthropie dans les pensionnats internationaux de Suisse romande

    OpenAIRE

    Bertron, Caroline

    2015-01-01

    Cet article propose d’étudier comment les pratiques de don aux œuvres de bienfaisance font l’objet d’une construction académique dans des écoles secondaires d’élite. Les pensionnats privés non religieux de Suisse romande, réputés pour accueillir une jeunesse dominante cosmopolite, proposent des programmes scolaires internationaux, tels que le Baccalauréat International. Ces institutions dispensent à la fois une éducation implicite à la charité en faisant jouer le capital symbolique d’anciens ...

  5. Les nouvelles formes de la communication autour des projets urbains : modalités, impacts, enjeux pour un débat participatif

    Directory of Open Access Journals (Sweden)

    Hélène Bailleul

    2008-09-01

    Full Text Available Dans cet article, nous observons les évolutions que l’usage des nouvelles technologies implique dans la communication autour des projets urbains. Notre analyse des nouvelles modalités qu’Internet a pu importer dans la participation des habitants aux projets urbains (partie 1 nous pousse à observer, plus spécifiquement, les modifications qui ont trait, dans ce contexte, à la nature et au statut de l’information sur l’espace. La démocratisation des techniques de représentation de l’espace par ordinateur (3D, simulation entraîne le recours quasi systématique à des images virtuelles du projet, d’une grande qualité (partie 2, mais dont on ne connaît que très peu les impacts sur la perception et la réception que les habitants font du projet (partie 3.In this article, we observe the evolutions involved by the use of new technology in the communication around urban projects. Our analysis of the new modalities, Internet was able to import in the participation of inhabitants in urban projects (chapter 1 urges us to examine, more specifically, the modifications concerning the nature and the status of the information about space. The democratization of computer-based spatial representation’s tools (3D, simulation entails more and more systematic recourse to virtual images of the project, with high definition (chapter 2. But, nowadays, we still know little about their impacts on the perception and the reception, the inhabitants make of the project (chapter 3.

  6. Feminicidio / femicidio : les enjeux théoriques et politiques d’un discours définitoire de la violence contre les femmes

    OpenAIRE

    Lapalus, Marylène

    2016-01-01

    Cet article s’intéresse au travail de reformulation discursive et définitoire des violences contre les femmes par les intellectuelles latino-américaines, au Mexique et au Costa Rica, depuis vingt ans. Il se donne comme objectif d’identifier les stratégies définitoires utilisées par les concepts de femicidio et feminicidio pour dénoncer, conceptualiser et politiser la violence vécue, en particulier dans l’espace intime. En combinant les apports de la réflexion sociologique et linguistique, cet...

  7. Les enjeux socio-environnementaux du développement durable en Amérique du Sud. Considérations à partir du cas colombien

    Directory of Open Access Journals (Sweden)

    Oscar Navarro

    2011-12-01

    Full Text Available Parler du développement durable dans le contexte des pays émergents tels ceux de l’Amérique Latine et particulièrement la Colombie, implique d’aborder le caractère conflictuel lié à la possibilité d’y atteindre les buts de ce paradigme du développement. Il est donc nécessaire de connaitre les obstacles sociopolitiques et culturels que rencontrent ces sociétés (corruption et instabilité institutionnelle, conflit armé, pauvreté, etc.. Étudier la base et les dynamiques psychosociales des conflits socio-environnementaux permet de mieux comprendre ces obstacles, mais aussi de dégager des réponses afin de mieux gérer ces tensions. Le cas de la Colombie et plus particulièrement des conflits autour de l’eau dans la Sierra Nevada de Santa Marta nous permettent d’illustrer nos propos.Talk about sustained development in emergent countries such as in Latin America and specifically Colombia, implies to tackle the conflicting character linked to the possibility to aim the objectives of this development paradigm. It is so necessary to know socio-political and cultural obstacles these societies meet (corruption and institutional instability, armed conflict, poverty, etc…. Study socio-environmental conflict’s bases and psychosocial dynamics help to better understand these obstacles, but also to find out answers to better manage this pressure. Colombia’s case and water conflicts in the “Sierra de Santa Marta” above all will allow us to give an illustration of this matter.

  8. Conference debate ' the petroleum and gas peaks: consequences and stakes'; Conference debat 'les pics petrolier et gazier: consequences et enjeux'

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-05-15

    The debate aims to define the future petroleum and gas peaks. It first precises the complex technical and economical notion of reserves and resources. It precises that it will be rather a plateau than a peak. It discusses also the necessity of substitution energies in the future, in an increasing world and the clean use of the fossil resources and the development of the renewable energies. (A.L.B.)

  9. Avis 8 sur les enjeux éthiques et déontologiques du partage et de la gestion des données issues de la recherche

    OpenAIRE

    Centre de Coopération Internationale en Recherche Agronomique pour le Développement

    2016-01-01

    Le partage des données de la recherche désigne la mise à disposition sur le réseau informatique mondial (Internet), d’enregistrements factuels sous forme numérique (selon le contexte : résultats d’expériences, observations de terrain, résultats d’enquêtes, images, etc.), collectés pour être analysés dans le cadre d’un travail de recherche. [br/] Cette initiative a pour objectif premier d’accroître la transparence de la démarche scientifique, un mouvement dénommé « science ouverte ». Cette ...

  10. Sens et enjeux d’un interdit alimentaire dans le judaïsme Food taboos in Judaism: the example of Ashkenazi Jews in London

    Directory of Open Access Journals (Sweden)

    Laurence Faure

    2010-12-01

    Full Text Available Cet article porte sur la manière dont la prohibition de mêler nourritures lactées et carnées dans le judaïsme se matérialise par les objets de la cuisine et leurs usages quotidiens, à partir d’une recherche réalisée à Londres auprès de couples juifs ashkénazes qui se définissent presque tous comme orthodoxes (modern orthodox et dont la scolarisation dans des écoles juives a parfois pu contribuer à revivifier les pratiques religieuses. Par delà la diversité des habitudes culinaires et de leurs formes (ex : végétarisme, par delà les éventuelles variations individuelles de l’observance religieuse au cours du cycle de vie, l’interdit alimentaire de mêler lait et viande est respecté par l’ensemble des personnes rencontrées. Il s’agit alors d’en comprendre le sens et la portée. Les conséquences matérielles de cet interdit alimentaire permettent de saisir l’importance de la religion dans le logement et les activités de tous les jours. Elles conduisent à articuler le plan matériel et le plan symbolique en suggérant une interprétation anthropologique de cette prohibition, en lien avec les écrits bibliques et les analyses déjà menées sur le sujet.This article is based upon research on Ashkenazi Jewish families living in London. It deals with the way, in Judaïsm, the prohibition of eating meat and dairy foods together is materialised through the use of kitchen utensils on a day to day basis. Material consequences of this dietary law allow us to understand the importance of religion in the Jewish home and in everyday life. Consequences which lead to the linking of material uses and their symbolic significance by suggesting an anthropological interpretation of this dietary law in accordance with Biblical writings.

  11. Development of nuclear medicine techniques - radiation protection issues for patients; Evolution des techniques en medecine nucleaire - Enjeux de radioprotection pour les patients

    Energy Technology Data Exchange (ETDEWEB)

    Marchandise, Xavier [Faculte de Medecine de Lille, F-59045 Lille Cedex (France)

    2011-07-15

    Nuclear medicine uses radioactive isotopes for diagnostic or therapeutic purposes. The radiation protection culture is now well-anchored in the training of nuclear medicine specialists in France and must remain at the highest possible level. However, practices change and the immediate medical - or even media - interest in new equipment and new tracers must not obscure the fundamentals of patient radiation protection. Particular vigilance is today required with regard to two aspects: - children; - the corresponding computed tomography. (author)

  12. Enjeux fonciers, exploitation des ressources naturelles et Forêts des Communautés Locales en périphérie de Kinshasa, RDC

    Directory of Open Access Journals (Sweden)

    Vermeulen, C.

    2011-01-01

    Full Text Available Land issues, exploitation of natural resources, and Forests of Rural Communities in the periphery of Kinshasa, DRC. Peri-urban forests are under strong anthropic pressure. Any activity needs a previous identification of stakeholders, landscape perception, socio-economic trends in local communities and their relationships with land and natural resources. Kinshasa (capital of Democratic Republic of Congo, DRC is a 10 millions inhabitants city with rapid growth and increasing impacts on surrounding villages linked with forest natural resources. This paper describes the relationship amongst local communities stakeholders and their relations with land areas and wood resources. Two areas surrounding Kinshasa (Bas-Congo and Bateke Plateaux are considered as major fuel-wood and charcoal supply zones for the city. Those two areas are different in terms of land pressure (very high in Bas-Congo and focused on riparian forests on Bateke Plateaux, but show the same pattern of overuse of the forest and woody natural resources. In both areas, local management of forest resources by the traditional authorities (heads of village or lineage has failed. Local population willingness for reforestation and forest restoration activities is much more important in Bas-Congo than on Bateke Plateaux. In both areas, shifting cultivation due to slash and burn practices for agricultural and charcoal practices are more and more quick. This has strong negative impact on the potential of regeneration process with local forest species. Sustainability of forest natural resources management by communities is discussed in regard to the on going negotiations on community based forest management regulations.

  13. Fossil fuels: technical, economical and political challenges for 2030-2050; Combustibles fossiles: enjeux techniques, economiques et politiques a l'horizon 2030-2050

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This panorama takes stock on the international energy actuality in 2003 and discusses the instability of the geo-political context of the energy and the part of the fossil fuels for the future years 2030-2050. The following topics were presented: activities and market for the exploration-production, refining and petrochemistry, the world gas trade situation, the petroleum supply and demand, the Iraq, the diesel in the USA, the investments and the depletion, long-dated evolutions of motors and fuels, implementing of the european directive concerning the market of tradable permits of CO{sub 2}, the carbon sequestration, hydrogen the energy of the future and the biofuels in Europe. (A.L.B.)

  14. Le coupé décalé en Côte d'Ivoire : Sens et enjeux d'un succès musical

    African Journals Online (AJOL)

    8 mars 2007 ... déterminant, c'est une nouvelle fois son lien spécifique avec l'imaginaire politique des jeunes urbains. ... Au rythme de la musique, la main droite mime le geste de couper et les jambes se lance .... 113 Je fais références aux luttes fratricides qui ont émergé en Côte d'Ivoire entre les différents prétendants au.

  15. Enjeux de la gestion des espèces exotiques envahissantes dans les milieux d'eau douce en outre-mer

    Directory of Open Access Journals (Sweden)

    SOUBEYRAN, Yohann

    2012-02-01

    Full Text Available Les milieux aquatiques d’eau douce en outre-mer ne sont pas épargnés par les espèces exotiques envahissantes. Ces espèces ont des impacts négatifs, avérés ou potentiels, importants. Diverses actions sont mises en œuvre tant sur le plan national que local pour mieux les gérer, mais de nombreux défis restent encore à relever.

  16. Employer's Guide: A Time for Action on Sexual Harassment in the Workplace = Guide de L'Employeur: Les Enjeux du Harcelement Sexuel au Travail.

    Science.gov (United States)

    Ontario Women's Directorate, Toronto.

    Harassment, like other forms of violence against women, is not a new problem. It is not a problem that will just go away, but it can be stopped. This guide is designed for use by organizations and employers to help them develop policies and implement programs in their workplace that address workplace sexual harassment. It focuses on Canadian…

  17. Politique juridique et diplomatie sportive du Cameroun de 1960 à nos jours : enjeux et mutations à l'ère de la mondialisation

    Directory of Open Access Journals (Sweden)

    Jabea Claude Bekombo

    2016-01-01

    Full Text Available Si l'organisation de ce qu'on peut appeler la communauté sportive internationale est structurée autour du « corporatisme sportif », les Etats, eux, sont marqués par la prégnance de la dualité « territoire » et « souveraineté ». C'est sous ce fondement binaire que l'Etat légifère sur le sport, on parle de politique juridique sportive et utilise le sport comme élément de sa diplomatie, on parle de diplomatie sportive. L'intérêt de cette étude est d'identifier les éléments constitutifs de la politique juridique et de la diplomatie sportive du Cameroun et In fine de donner des éléments permettant d'en parler de depuis l'indépendance.

  18. Le coupé décalé en Côte d'Ivoire : Sens et enjeux d'un succès musical

    African Journals Online (AJOL)

    This article is an explanatory contribution of the current success of the cut offset a new Ivorian musical genre occurred in the corridors of the Ivorian crisis. His current success is not unrelated to the phenomenon of globalization, but the factor that seems decisive is once again its specific link with the political imagination of ...

  19. Tourisme, développement et enjeux politiques : l’exemple de la Petite Côte (Sénégal

    Directory of Open Access Journals (Sweden)

    Olivier Dehoorne

    2011-09-01

    Full Text Available IntroductionAu cours de la dernière décennie du XXème siècle, le secteur touristique sénégalais a connu une croissance soutenue : les flux internationaux sont passés de 246 000 arrivées en 1990 à 427 000 en 2002. Avec plus de 210 millions de $US en 2003 (contre 167 millions $ US en 1990, le touristime est devenu le second fournisseur de revenus après la pêche ; ses revenus devancent désormais ceux des phosphates et de l’arachide. La croissance régulière de ce secteur profite essentiellement ...

  20. Enjeux juridiques du contrôle des émissions personnelles de gaz à effet de serre par un dispositif de carte carbone

    Directory of Open Access Journals (Sweden)

    Sandrine Rousseaux

    2011-02-01

    Full Text Available La carte carbone individuelle est un dispositif innovant, qui permet d’impliquer les particuliers dans la lutte face au changement climatique. Ce dispositif consiste à limiter leurs émissions de gaz à effet de serre, ce qui suppose de suivre leur consommation de certains produits et services. Ce mode de contrôle des émissions personnelles soulève parfois des controverses, la carte carbone pouvant être perçue comme un instrument de rationnement potentiellement liberticide. Ces deux aspects sont discutés sur la base d’une analyse comparative de la conception et des modalités de mise en œuvre des différents dispositifs de carte carbone, établis ou envisagés en Europe et aux États-Unis. Il en ressort que les controverses ne sont pas réellement fondées.The individual carbon card is an innovative mechanism that helps involve individuals in the fight against climate change. It consists in limiting their greenhouse gas emissions, which requires monitoring a part of their goods and services consumption. This method of personal emissions control is much debated since the carbon card may be perceived as a rationing tool and raises civil liberty issues. Both of these controversial aspects are discussed on the basis of a comparative analysis of how the various carbon card programs, established or contemplated in Europe and in the USA, are designed and implemented. The findings are these controversies are somewhat groundless.

  1. Activité collective et réélaboration des règles : des enjeux pour la santé au travail

    OpenAIRE

    Caroly , Sandrine

    2010-01-01

    L'activité collective se définit comme une articulation entre le travail collectif et le collectif de travail. Le travail collectif correspond aux modes de coopération et de collaboration entre les membres d'une équipe. Il facilite dans certains cas la mise en œuvre de régulations individuelles et collectives pour gérer les perturbations issues de situations caractérisées par des conflits de but et donnent une ressource à chacun pour ne pas être seul face à la diversité des prescriptions, not...

  2. Enjeux et réalités d'une politique publique : la NPI sénégalaise

    OpenAIRE

    Valette, Alain

    1991-01-01

    La Nouvelle Politique Industrielle appliquée au Sénégal sous l'inspiration de la Banque Mondiale vise à réformer en profondeur les structures de la production manufacturière. Elle s'est cependant heurtée, en plusieurs occasions, aux objectifs d'ajustement financier et de réduction des dépenses publiques poursuivis dans le même temps, sous l'égide du Fonds Monétaire International. Une fois la première phase de surprise et d'incrédulité passée, les industries ont engagé des stratégies de ripost...

  3. Le coupé décalé en Côte d'Ivoire : Sens et enjeux d'un succès musical

    African Journals Online (AJOL)

    8 mars 2007 ... les individus achètent et consomment des biens économiques pour conquérir le statut .... d'ivoiriens, « le capital d'espoir projeté et déposé entre les mains de .... A défaut d'avoir un humain pour parvenir à ce but, il encourageait , .... Mais puisque la ville d'Abidjan est le fruit d'une croissance plutôt que ...

  4. L’encadrement de mémoires et de thèses en sciences de l’éducation : enjeux et défis

    Directory of Open Access Journals (Sweden)

    Jean Gabin Ntebutse

    2010-05-01

    Full Text Available En sciences de l’éducation, la durée des études de maîtrise et de doctorat est considérée comme trop longue et le taux d’abandon jugé trop élevé. Une solution pour améliorer la situation réside dans l’encadrement. Une étude exploratoire a été menée auprès des directeurs de recherche et des étudiants de la Faculté d’éducation de l’Université de Sherbrooke. Les données recueillies par des entrevues semi-dirigées et des questionnaires ont porté sur les dimensions matérielles, financières, relationnelles et intellectuelles de l’encadrement. Les résultats mettent en évidence de bonnes pratiques et des difficultés. Même si l’institution fournit des appuis à la poursuite des études et à la socialisation scientifique, la formation individualisée à la recherche advient grâce au travail régulier de l’étudiant soutenu par son directeur et, éventuellement, sa participation à une équipe de recherche. Autant pour les directeurs que pour les étudiants, la recherche d’un équilibre entre leurs multiples tâches demeure un défi important pour en arriver à la complétion du diplôme.In the field of education, master and doctoral studies are considered too lengthy, and the dropout rate too high. One solution for improving the situation is to support supervision of studies. An explanatory study has been carried out at the Faculty of education at Université de Sherbrooke where material, financial, relational and intellectual conditions of supervision were examined. Data have been collected through semi-directive interviews and questionnaires distributed to research directors and students. The results highlight good practices and difficulties. The institution does provide support for the pursuit of studies and various aspects of scientific networking. However, individualized research training is achieved through the student’s regular work supported by his director and, eventually, his participation in a research team. Finding a balance between their multiple tasks remains a considerable challenge for directors and students alike in the process leading up to the completion of the programme.

  5. Lavorel Sabine, Les Constitutions arabes et l’islam. Les enjeux du pluralisme juridique, Presses de l’Université du Québec, 2005, 202 p.

    Directory of Open Access Journals (Sweden)

    Bernard Botiveau

    2008-07-01

    Full Text Available Dans les études juridiques sur les sociétés arabes actuelles, le droit constitutionnel reste un terrain à explorer. Quelques ouvrages sont parus récemment, tandis que des articles monographiques, pays par pays, faisaient régulièrement état des transformations normatives intervenues dans ce domaine. La réactivation de la justice constitutionnelle dans certains pays arabes a encouragé le renouveau de ce domaine de recherche dont l’accès limité tient aussi dans une certaine mesure à la difficult...

  6. Fossil fuels: technical, economical and political challenges for 2030-2050; Combustibles fossiles: enjeux techniques, economiques et politiques a l'horizon 2030-2050

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This panorama takes stock on the international energy actuality in 2003 and discusses the instability of the geo-political context of the energy and the part of the fossil fuels for the future years 2030-2050. The following topics were presented: activities and market for the exploration-production, refining and petrochemistry, the world gas trade situation, the petroleum supply and demand, the Iraq, the diesel in the USA, the investments and the depletion, long-dated evolutions of motors and fuels, implementing of the european directive concerning the market of tradable permits of CO{sub 2}, the carbon sequestration, hydrogen the energy of the future and the biofuels in Europe. (A.L.B.)

  7. Control strategies for reducing consumption and pollutant emission on isolated junctions: field results; Enjeux de la regulation aux carrefours pour reduire la consommation et la polution: resultats experimentaux

    Energy Technology Data Exchange (ETDEWEB)

    Midenet, S.; Boillot, F.; Pierrelee, J.C. [Institut National de Recherche sur les Transports et leur Securite, INRETS, Lab. Genie des Reseaux de Transports et Informatique Avancee, GRETIA, 94 - Arcueil (France)

    2000-07-01

    We present experimental results dealing with traffic light control strategies for reducing CO{sub 2} emission and fuel consumption on isolated intersection. The experimental site, located near Paris, is a 400 meter area centred on an isolated junction that has been equipped with video sensors (for queue lengths and other spatial traffic measurements). A complete control device enables to actually control the junction traffic lights from our INRETS laboratory. A model has been designed to estimate emission and consumption mean costs based on video traffic measurements. The model's coefficients have been calibrated with real life kinematics profiles and corresponding instantaneous emission measurements, provided by INRETS-LTE; we ended up with coefficients for diesel, catalyst gasoline and non-catalyst gasoline passenger cars. An 8 months experimental period in 1998-1999 led to constitute a large database of one-hour traffic measurement samples, that cover the usual traffic condition ranges for each strategy applied on field. The consumption and emission costs for each strategy, along with comparative benefits have been computed on this basis. We show that the CRONOS adaptive real-time strategy based on waiting time minimization leads to important benefits on the part of the cost that is related to stops and waiting time: 14 % on average for CO{sub 2} emission. This benefit remains significant on the total cost (around 4 % for CO{sub 2}) and noticeable whatever the traffic conditions. (authors)

  8. L'hydrologie, une partenaire de la géomorphopédologie pour une gestion transéchelle des grands enjeux environnementaux

    Directory of Open Access Journals (Sweden)

    Colard, F.

    2011-01-01

    Full Text Available Hydrology: a partner of geomorphopedology in the scope of a scale-through environmental management. Unsaturated soil and subsoil are often called "critical zone" considering their major interfacing role in our environment. Dealing with solute transfer or water and soil conservation, hydrologic research relies on pedologic descriptions. It is the case from micro to macro scale analysis. Hydrodynamic parameters are derived from pedologic information on soil. They allow hydrologists to quantify and spatially describe the dynamic exchanges between water, soil, crops and atmosphere. The modelling of water and solute transfer through soil and vadose zone also needs them. The paper presents some research highlights on soil behaviour, hydrological modelling and forecasting under climate change. Erosion is another major topic. Soil is a poorly renewable resource. Soil conservation and soft hydraulic management in watersheds deserve more attention. They can help limiting nutrient and sediment transfer to surface water. Again, pedologic information is the starting point of conceptualization and modelling. Furthermore, the Soil Map of Belgium includes information on geomorphology and landscape descriptions which date from decades. They are of first importance to calibrate and validate detachment, transport and sedimentation models. In the current context of high environmental concern, it is demonstrated how hydrology and pedology have to be partners in order to deal with such major issues.

  9. Jeux et enjeux d’écriture chez Chrétien de Troyes: l’exemple de «Cligès»

    Directory of Open Access Journals (Sweden)

    Ida Lucia Machado

    2011-10-01

    Full Text Available Neste artigo, nos propomos descrever a estética da trama irônica presente na escritura de Chrétien de Troyes, tomando por base seu romance Cligès. A destacar algumas estratégias passíveis de criar o fenômeno irônico, estaremos também mostrando o poder de sedução que emana desta escritura.Nous nous proposons, dans cet artible, de décrire l’esthétique du jeu ironique chez Chrétien de Troyes, em puisant dans son roman Cligès. Enn dégageant qulques unes dês stratégies susceptibles de créer le phénomène ironique, nous montrerons, à la fois, le pouvoir de séduction qui emane de cette écriture.

  10. Nuclear systems of the future. Stakes, R and D strategy, and international cooperation; Les systemes nucleaires du futur. Enjeux, strategie de recherche et developpement, et cooperation internationale

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    As demonstrated by prospective studies, nuclear energy will represent a decisive contribution in the future energy mix. The long-term strategy of development of nuclear energy requires to foresee a new generation of nuclear systems, named generation 4. The goal of these new systems is to optimize the use of nuclear fuels, to minimize the generation of wastes and to enlarge the field of applications of nuclear energy to other applications like: hydrogen and synthetic fuels generation, heat generation for the industry etc. This document presents the French R and D strategy on nuclear systems of 4. generation that has been approved by the public authorities. This strategy follows three axes: a priority research on fast neutron systems with fuel recycle (sodium fast reactors (SFR) and gas fast reactors (GFR)), a research on key-technologies for the supply of very high temperature heat (very high temperature reactor (VHTR), fast and thermal neutron reactors, and water decomposition processes), and a continuation of researches on PWR reactors improvement. An integral recycling of all actinides in fast neutron reactors requires the development of new fuel reprocessing and fuel re-fabrication processes. A reference scenario for the progressive renewal of French nuclear facilities foresees the simultaneous development of fast neutron systems and the start-up of a new spent fuel reprocessing plant. France in involved in the development of the SFR, GFR and VHTR systems thanks to its participation to the Generation 4 international forum and to bilateral cooperation with other big nuclear partners like Russia and China. One of the main stakes of the French nuclear industry is to be able to invest in the R and D of future nuclear systems in order to valorize the experience gained so far in sodium FBR systems and in fuel cycle processes. (J.S.)

  11. La démarche "supply chain management" enjeux et stratégies, cas du commerce électronique et de la grande distribution.

    OpenAIRE

    JAWAB , Fouad; Bouami , Driss

    2004-01-01

    International audience; The economic globalisation forces the companies to progress in an environment characterized by the blooming of the relations of partnership, the emergence of the reticular organizations and the crucial impact of new technologies of information of communication (NTIC). In this context, the supply chain management (SCM) becomes more and more important in the strategies of the firms which inquire of better performances. In fact, the experiments of the firms leading make i...

  12. Le "Supply Chain Management" enjeux et stratégies, cas du commerce électronique et de la grande distribution

    OpenAIRE

    JAWAB, Fouad; BOUAMI, Driss

    2004-01-01

    Abstract. The economic globalisation forces the companies to progress in an environment characterized by the blooming of the relations of partnership, the emergence of the reticular organizations and the crucial impact of new technologies of information of communication (NTIC). In this context, the supply chain management (SCM) becomes more and more important in the strategies of the firms which inquire of better performances. In fact, the experiments of the firms leading make it possible to ...

  13. La force de l’héritage. Sociologie du mouvement social des ex braceros (Travailleurs agricoles mexicains 1942-1964) et ses enjeux

    OpenAIRE

    Schaffhauser, Philippe

    2014-01-01

    A lo largo de sus 20 años de existencia, de 1942 a 1964, el programa Bracero se tradujo en la firma de 4 646 199 contratos de trabajo e involucró a cerca de 1.5 millones de trabajadores; los que inicialmente fueron empleados en la construcción de vías férreas y en la agricultura, y después de la Segunda Guerra Mundial, sólo en el sector agrícola. Este movimiento también es cuestión de generaciones y una historia de géneros. Dicha articulación hace de esta lucha social “un asunto de familia” q...

  14. Les enjeux identitaires de l’humain dans le débat philosophique sur la robotique humanoïde et l’amélioration humaine

    Directory of Open Access Journals (Sweden)

    Béland, Jean-Pierre

    2014-11-01

    Full Text Available Do human identity representations (human identity, natural/artificial distinction still make sense in the context of the development of humanoid robotics (humanizing the robot and human enhancement (automation of the human? The problem is that critical philosophers, like Lin and Allhoff who founded the journal NanoEthics, challenge these representations of human identity, as if the discussion of the ethical evaluation of these representations was exhausted with regards to the two issues that they raise in 2009 in Ethics of Human Enhancement: 25 Questions and Answers, i.e.: “Does the notion of human dignity suffer with human enhancements?” and “Is the natural-artificial distinction morally significant in this debate?” The purpose of this article is to show – in light of various texts that constitute our framework for analyzing moral arguments – the limits of the scope and insufficiency of the critical arguments that Lin and Allhoff use to answer these two questions. But in applying our framework to these authors, we will also show how the question of human identity or the natural/artificial distinction still makes sense in the ethical evaluation.

  15. Enjeux des politiques industrielles basées sur les clusters d'innovation: cas des pôles de compétitivité

    OpenAIRE

    Iritié, B. G. Jean-Jacques

    2014-01-01

    In this paper, we analyze the issues of innovation clusters-based industrial policy through the economic issues of three industrial dynamics, i. e. R and D (or innovation), location of innovation activities and technology cooperation. It appears that the key elements that justify these new policies are the production and sharing of knowledge, sharing of indivisibility and economic growth. Then, we focuse on the french poles of competitiveness.

  16. Enjeux esthético-idéologiques du stéréotype dans les derniers romans de Mongo Beti

    Directory of Open Access Journals (Sweden)

    J.-J. Rousseau Tandia Mouafou

    2009-12-01

    Full Text Available Cette réflexion se propose d’actualiser le concept de stéréotype, habituellement réservé aux sciences sociales, dans l’exploration du texte littéraire. Nous observons ainsi que l’idée de fixité au cœur de la problématique du stéréotype est un concept opératoire qui permet de lire autrement le récit sur le triple plan linguistique, thématico-narratif et idéologique. Les valeurs textuelles que ce concept permet de mettre en évidence portent à croire que notre corpus apparaît, dans une perspective sociocritique, comme une métaphore des sociétés africaines post-coloniales.

  17. Gestion et enjeux d'une opération de démolition d'un immeuble bâti

    OpenAIRE

    Moquet, Gaël

    2016-01-01

    L’évolution règlementaire récente a profondément bouleversé l’activité de démolition. L’abattage d’un édifice d’un seul coup à la « boule de démolition » ou à l’explosif a laissé de plus en plus la place à des opérations « étapisées » par le retrait des matériaux étape par étape. En effet, la découverte et la prise en compte de produits dangereux dans le bâtiment engendre l’organisation de phases de travaux préalables dites de « dépollution », ainsi que les objectifs règlementaires imposant l...

  18. es enjeux éthiques de la pratique privée de l’ergothérapie : perceptions d’ergothérapeutes

    Directory of Open Access Journals (Sweden)

    Goulet, Marie

    2017-05-01

    Full Text Available In Quebec, 31% of occupational therapists work in the private sector, which is constantly growing. To date, no studies have specifically documented the ethical issues involved in this practice. The objective of this study was to explore these issues, that is, situations that could compromise the respect of an ethical value. Using a phenomenology-inspired research protocol, seven occupational therapists were interviewed in semi-directed individual interviews. Based on the conceptual framework of Swisher and colleagues, the interview questionnaire permitted the identification of different types of ethical issues. The results show that several values ​​are likely to be compromised: patient well-being, patient autonomy, public safety, distributive justice, quality of interventions, competent practice, professional independence, honesty and professionalism. Although occupational therapists are concerned about the well-being of patients, there are a number of factors that appear to contribute to compromised values, including dual-loyalty situations experienced by occupational therapists, third-party interference in the clinical process, and the funding of clinics. Moreover, the ethical issues of private practice occupational therapy are mainly macroscopic. The ability of occupational therapists to perceive some of these issues seems to be related to some of their characteristics, that is, their ethical sensitivity and the fact that they are novices. The results of this study are generally in line with those documented in the physiotherapy literature and demonstrate the lack of support available to occupational therapists, notably novices, to help effectively overcome these issues.

  19. Le cycle de l'eau et les activités au sein de l'espace rural. Enjeux globaux, solutions locales et régionales

    Science.gov (United States)

    Perrier, Alain; Tuzet, Andrée

    2005-02-01

    The analysis of the water cycle emphasizes the weight of surface evaporation compared to rain and the weight of water availability compared to evaporation. The ocean is a huge machine producing water vapour contrary to the continents, where evaporation is limited by plants that must shield themselves from drying and particularly by bare soils where the surface drying slows down the water losses. The availability of water for the biosphere depends on the difference between rain and evaporation. This difference, often called 'net supply', can be modified by anthropogenic actions on the vegetation; for example, the anthropogenic actions such as drying climate (reducing evapotranspiration) increases the net supply; on the opposite, the large development of more and more covering vegetation (arboreous system, bocages, savannah...) decreases the net supply (larger surface evapotranspiration all over the year). Moreover, the feedback between climate and continental interface can modify the rainfall pattern and the thermal equilibrium, leading ecosystems to extreme situations such as drying climate and desertification (ET lower and lower) or equilibrium situations corresponding to large development of vegetation (ET close to EP). The anthropogenic pressure and the human food requirements lead human beings to keep nearly the whole available water of the biosphere, particularly to practise irrigated agriculture. This practise is on average two times more efficient than the rainy agriculture (which is why it is attractive); moreover, its water efficiency decreases according to the environment and its aridity. Except for arboreous systems and agroforestry, agriculture is always a system that leads more or less towards aridity, but we have to bring it under control and to make it sustainable. A good management of the whole rain requires an efficient organization of the territory to optimise the water consumption in order to protect the environment and its biodiversity, to increase the agricultural production, to avoid pollutions and to reduce everywhere it is possible the natural degradation (deforestation-aridification-desertification), even to reverse it. It is the reason why, in situations nearly always unstable and very often difficult, water is inseparable from environment, and any approach on water management cannot be imagined and evaluated out of the context defined by the triptych 'anthroposphere-biosphere-technosphere'. To cite this article: A. Perrier, A. Tuzet, C. R. Geoscience 337 (2005).

  20. Rôle des acteurs dans le processus d’élaboration de projets routiers. Analyse de l’approche opérationnelle et recherche de critères décisionnels.

    Directory of Open Access Journals (Sweden)

    Shahinaz Sayagh

    2008-08-01

    Full Text Available Depuis le stade des études préliminaires jusqu’à la réalisation des travaux, un projet routier fait l’objet de décisions successives (opportunité, budget, tracé…, selon une procédure progressive et réglementée. Cette succession de choix s’insère dans un faisceau de contraintes environnementales, techniques et financières. Ceci rend le processus décisionnel complexe, du fait notamment de la multiplicité des acteurs potentiellement impliqués. Dans ce contexte, la contribution de chercheurs peut consister à fournir des méthodes, permettant d’apporter un éclairage sur les conséquences potentielles en terme de développement durable, des décisions successives prises depuis la conception d’un projet routier jusqu’à sa réalisation. Dans cette perspective, une analyse des critères décisionnels propres à chacun des acteurs au sein du processus décisionnel, est nécessaire. L’objectif de cet article est d’analyser sur quels enjeux généraux reposent les critères décisionnels intervenant dans les différents choix successifs d’un projet routier. Il s’agit d’une part d’effectuer l’examen détaillé du processus décisionnel régi par des éléments factuels imposés par la réglementation, et d’autre part de mieux appréhender les critères non réglementaires, propres à chaque acteur sous la forme de témoignages. Sur la base de la synthèse réalisée, une discussion propose ensuite de mettre en perspective l’analyse effectuée au regard des enjeux environnementaux et de concertation. L’analyse montre la difficulté à définir une liste de critères décisionnels relatifs à la prise en compte des enjeux du développement durable. D’autre part, la réflexion menée met en lumière la meilleure prise en compte des enjeux environnementaux lorsqu’une démarche de concertation est menée en amont du projet, ce qui va au-delà du simple cadre réglementaire et reste à l’initiative de la ma

  1. Accumuler le capital humain tout au long de la vie: Quels facteurs prédictifs de la participation à la formation permanente?

    Science.gov (United States)

    Boudard, Emmanuel; Morlaix, Sophie

    2003-09-01

    This article addresses the main predictors of adult education, using statistical methods different from those generally used by social science researchers. Its aim is twofold. First, it seeks to explain in a simple and comprehensible manner the methodological value of these methods (in relation to the use of structural models); secondly, it demonstrates the concrete usefulness of these methods on the basis of a recent piece of research on the data from the International Adult Literacy Survey (IALS).

  2. La consommation urbaine de l’huile de palme rouge en Côte d’Ivoire : quels marchés ?

    Directory of Open Access Journals (Sweden)

    Cheyns Emmanuelle

    2001-11-01

    Full Text Available Au côté d’une extraction industrielle de l’huile de palme dont les débouchés sont l’exportation en Europe et, en Côte d’Ivoire, la seconde transformation en huile industrielle raffinée et produits dérivés (savons, margarines pour un marché ivoirien et sous-régional, il existe un secteur de transformation artisanal de l’huile rouge (et aussi de l’huile de palmiste et de savons qui répond à une demande différenciée des consommateurs ruraux mais aussi urbains. En termes d’équipements de transformation, le secteur artisanal est peu développé (beaucoup moins que dans d’autres pays de la sous-région. L’extraction de l’huile rouge y est soit entièrement manuelle, soit semi-mécanisée : utilisation de presses à vis verticales très simples et peu coûteuses. Les trente dernières années de développement industriel n’ont pas permis à la Côte d’Ivoire de se doter d’équipements semi-industriels ou artisanaux, intermédiaires 2 entre l’usine de 20 ou 40 t/h et la transformation manuelle par les femmes, alors que d’autres pays voisins se sont au contraire dotés de ces équipements [1]. Quoi qu’il en soit, ce secteur artisanal informel, maîtrisé par les femmes (transformation et commercialisation, approvisionne largement les marchés de consommation locaux, ruraux comme urbains, en un produit considéré comme spécifique (que ne fournit pas l’agro-industrie locale et qui semble toujours apprécié des consommateurs. Il nous amène à reconsidérer la filière « palmier à huile » sous l’angle d’une filière dont le produit est aussi « vivrier » (par opposition à produit de « rente » et qui assure un approvisionnement des marchés locaux, via des circuits informels, en répondant à une demande locale. Une première enquête 3 par entretiens approfondis auprès de 28 ménages abidjanais révèle une différenciation de la demande qui s’établit sur la qualité des produits, et qui justifie l’existence de ce secteur de transformation. Les objectifs de cette enquête étaient de resituer la place de l’huile rouge artisanale dans la consommation des ménages urbains, et les raisons pour lesquelles ce produit n’a pas été entièrement remplacé par l’huile de palme industrielle.

  3. Quels indicateurs pour mesurer le développement professionnel dans les métiers adressés à autrui ?

    Directory of Open Access Journals (Sweden)

    Thierry Piot

    2011-06-01

    Full Text Available Cet article propose des indicateurs destinés à mesurer le développement professionnel dans les métiers adressés à autrui. La première partie s’intéresse à la genèse de la notion de développement professionnel, issue de la rationalisation induite par la seconde modernité ; elle indique que les métiers adressés à autrui sont tenus d’articuler une rationalisation forte et une rationalisation faible. Puis, nous présentons le cadre de la didactique professionnelle, particulièrement pertinent pour s’intéresser à l’analyse du travail d’interaction humaine et mettre au jour ses dilemmes. À partir d’une recherche empirique concernant des formateurs d’une école d’aides-soignants, nous proposons, à partir d’une lecture plurielle qui prend en compte les compétences et l’identité professionnelle, cinq indicateurs qui sont l’objet d’un traitement afin d’être comparables, car c’est la cohérence entre les informations recueillies qui nous paraît rendre le mieux compte, malgré les limites, de la notion de développement professionnel dans les métiers adressés à autrui.What indicators should be used to measure professional development in non-teaching support occupations? This article proposes the use of indicators in these occupations. The first part considers the origin of the concept of professional development, coming from the rationalisation caused by the “second modernity”. This part indicates that these occupations are linked to both a strong and a weak rationalisation. The second part presents the framework for professional development that is particularly relevant to the analysis of social interaction and the updating its dilemmas. Starting from empirical research involving the trainers at a school for care assistants, five indicators are proposed for the competencies and professional identity that are sufficiently comparable for the best generalisations, despite all limitations, to support occupations.

  4. L'agriculture périurbaine à Sétif (Algérie : quel avenir face à la croissance urbaine ?

    Directory of Open Access Journals (Sweden)

    Boudjenouia A.

    2008-01-01

    Full Text Available Suburban agriculture in Setif (Algeria: which future in face of urban growth? The suburban agriculture in Setif which is mainly based on the specialized agricultural activities (cereals, animal production has an important role. Its economic and social values are regarded in terms of the hugeness of its areas, the number of its manpower and the quality of its production. It covers 75% of the municipality surface and production systems are generally organized according to the climatic conditions. However, the new, rapid and diffused urban growth greatly affects these traditional structures. It is subjected to different inconvenient factors from the nearby urban area and has difficulties in functioning due to vandalism of the cultures, neighboring conflicts often due to environmental problems such as degradation of the material, defection of irrigation network, illegal grazing, soil stamping, car traffic, etc. The conversion of agricultural lands, generally of high quality, into non-agricultural lands results mainly from the urban development at the expense of agriculture. The socio-economic needs in land have rendered the agricultural activities difficult and decreased the agriculture in suburban areas. Landscape is not considered as an essential structure by the city. Urban planning, decided only by the elected members, is somewhat inefficient in terms of agricultural land protection. Paradoxically, the laws of protection exist but are not applied. Four major considerations have been pointed out by this study: the constraints generated by the suburban agriculture in Setif, the situation of the agricultural land, the high urban pressure and its consequences, and the need to define the place of the suburban agriculture in the sustainable development of the city.

  5. Ressources pétrolières pour le XXe siecle : quel avenir ? Oil Ressources for the 21st Century: Constraints and Outlook

    Directory of Open Access Journals (Sweden)

    Alazard N.

    2006-11-01

    Full Text Available Les réserves prouvées d'hydrocarbures liquides sont aujourd'hui évaluées, suivant les sources, entre 950 et 1 000 milliards de barils. Leur durée de vie, au rythme actuel de la production mondiale, est d'environ 41 à 45 ans, soit bien supérieure à celles qui étaient couramment données en 1970 et 1980. Toutefois, cette abondance des ressources ne garantit pas obligatoirement la sécurité des approvisionnements pétroliers pour tous les pays. Il importe de souligner que les réserves pétrolières sont géographiquement inégalement réparties et que réserves et productions sont actuellement le fait des champs géants (champs ayant plus de 500 millions de barils de réserves initiales. Si l'approvisionnement pétrolier semble assuré pour les trente à quarante années à venir, quelles sont les perspectives au-delà de 2020-2030 ? L'augmentation des réserves prouvées au cours des dix à vingt années qui viennent de s'écouler n'est qu'apparente. Cet accroissement, après 1986, est essentiellement dû à des révisions et à des extensions plutôt qu'à de nouvelles découvertes. L'article, présenté ici, s'efforce d'inventorier et d'évaluer quelles pourraient être les nouvelles sources de pétrole : bruts conventionnels (brut récupérable compte tenu d'un prix au baril de l'ordre de 20 US$ et d'un taux de récupération voisin de 30 % restant à découvrir, ressources en huile issues d'une amélioration du taux de récupération, ressources résultant de l'exploitation de zones nouvelles (l'offshore profond, bruts de types non conventionnels tels que bruts extra-lourds, sables asphaltiques, huiles de schiste, et hydrocarbures liquides obtenus grâce aux méthodes de récupération assistée par voie chimique. The assessment of proven reserves of liquid hydrocarbons currently varies between 950 and 1 000 billion barrels, depending on the sources. The foreseeable lifetime, at the present rate of world production, is about 41 to 45 years, which is much longer than was forecast in both 1970 and 1980. However, this abundance of resources does not necessarily guarantee the security of oil supplies for all countries. It should be pointed out that oil reserves are distributed very unequally from a geopolitical standpoint, and also that both reserves and production are currently limited to giant fields (containing more than 500 million barrels each of initial reserves. Whereas oil supplies seems to be assured for the 30 or 40 years to come, what is the outlook beyond 2020-2030? The increase in the lifetime of proven reserves during the last ten to twenty years is only apparent. The considerable increase in proven reserves that has been indicated after 1986 is actually due mainly to revisions and extensions rather than to new discoveries. This article attempts to inventory and assess what new sources of oil might be : conventional crudes (with a price per barrel of around US$20 and a recovery rate in the vicinity of 30% remaining to be discovered; oil resources stemming from an improvement in the recovery rate; resources resulting from production from new zone, e. g. fields in the deep seas; unconventional crudes such as extra-heavy crudes, tar sands, shale oil and liquid hydrocarbons obtained by enhanced recovery by chemical methods.

  6. Le comportement des audités: quel effet sur la qualité de service rendu par les cabinets d’audit au Cameroun ?

    Directory of Open Access Journals (Sweden)

    Léopold Djoutsa Wamba

    2014-09-01

    Full Text Available La présente étude a pour ambition de vérifier s’il existe un lien empirique entre le comportement des audités et la qualité de l’audit au Cameroun. Nous avons à cet effet appréhendé la qualité de l’audit via les qualités de l’auditeur (sa compétence et son indépendance. En s’appuyant sur les analyses de classification et économétriques par la méthode de régression logistique sur des données recueillies par questionnaire auprès de 40 cabinets d’audits présents au Cameroun, les résultats montrent d’une part que la qualité de l’audit est plutôt altérée dans notre contexte. D’autre part, cette étude relève que la probabilité d’avoir un audit de qualité est d’autant plus grande lorsque les honoraires sont négociés à la hausse permanemment et, d’autant plus faible, si l’audité est absent lors du déroulement de la mission, ou s’il accuse des retards dans le paiement des honoraires ou encore, lorsqu’il n’a pas fourni à temps tous les documents nécessaires pour mener à bien la mission.

  7. The nuclear energy of the future: the researches and the objectives; L'energie nucleaire du futur: quelles recherches pour quels objectifs?

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    Today energy problems are global problems. That is why the new generation of energy production by nuclear power must be realized basely on serious forecasts at a world scale. The nuclear energy presents many trumps for an energetic answer, at long-dated, concerning the environment and the resources. This will be for two main conditions: the ability to answer the public opinion anxiety and the development of new systems more high- performance in terms of safety and economy in the framework of the sustainable development and the non proliferation policy. These subjects are at the earth of the CEA missions. This document proposes a detailed presentation of the nuclear origins, the fuel and its cycle, the radioactive wastes and their management,the dismantling and the decommissioning of the nuclear installations, the challenges of the nuclear safety, the energy in the world, the nuclear economy, the nuclear in the world, the researches of the future, the third generation reactors, the research on radioactive wastes, the fuel cycle of the nuclear systems of the future, the uranium resources, the generation four forum, the gas coolant reactors, the thorium, hybrid systems and the thermonuclear fusion. (A.L.B.)

  8. Les paradigmes sociologiques à l’épreuve des catégories de sexe : quel renouvellement de l’épistémologie du travail ?

    Directory of Open Access Journals (Sweden)

    Helena Hirata

    2005-01-01

    Full Text Available En este texto se realiza el balance de las rupturas teóricas con la tradición de la sociología del trabajo francesa cen- trada en la figura del obrero varón de empresa industrial. Se tratará de analizar dos tipos de rupturas: la provocada por la introducción de las categorías de sexo y la provoca- da por la introducción teórica de las relaciones sociales de sexo, o de género o, incluso, de relación social (de sexo. La periodización y el análisis de las consecuencias episte- mológicas de estas rupturas permitirán que aparezcan: el lugar real y el alcance de esta sexuación de los objetos de la sociología del trabajo; su valor heurístico en el análisis del trabajo; su papel en la renovación de los paradigmas que dominan el campo del trabajo y sus elaboraciones alternativas. A partir de cierta cantidad de ejemplos con- cretos, el texto mostrará las aportaciones de las investiga- ciones que introducen una perspectiva de género para, finalmente, apuntar algunas diferencias nacionales entre las sociologías del trabajo en su manera de integrar las relaciones sociales de sexo.

  9. Dématérialisation des corrections. : Quels changements dans la conception d'une épreuve d'évaluation ?

    OpenAIRE

    Capelle , Camille

    2011-01-01

    International audience; Notre contribution concerne l'intégration de technologies de dématérialisation de copies d'examen dans les pratiques de correction à l'Université. Ces technologies consistent à numériser les copies après une épreuve pour permettre une correction instrumentée sur une plateforme web dédiée. Doctorante CIFRE au sein de la société NEOPTEC, conceptrice du dispositif de dématérialisation des copies, l'approche par l'observation participante me permet de collecter, au moyen d...

  10. Fire and lightning: what are the risks and how to be protected?; Incendie et foudre: Quel sont les risques et comment se proteger?

    Energy Technology Data Exchange (ETDEWEB)

    Rigal, F.

    2011-04-15

    This article reviews the risks of fire and lightning on photovoltaic panels installed on roofs. It appears that the risk of lighting must be taken into account since the direct impact of lightning on photovoltaic panels can be disastrous. The installation of lightning rods or lightning protector is recommended. Concerning fire risks, technical failures or the presence of electric arcs can put fire on solar panels but their occurrence is very low (only about 20 cases reported in Europe for the last 10 years). Tests have shown that standard photovoltaic panels play a low part in the progressing of a fire. There is an electrocution hazard for firemen intervening on a roof bearing solar panels. A device cutting the continuous current generating by the panels is being studied. (A.C.)

  11. Le community manager ou animateur de communauté Web : quel nouvel acteur de la formation à distance ?

    OpenAIRE

    Savarieau, Béatrice; Guégan, Julie

    2017-01-01

    La recherche présentée s’est déroulée au sein de la Commission européenne (organe exécutif de l’Union européenne employant 33 000 agents) au cours de l’année 2016. Elle questionne le rôle du community manager, ou animateur de communautés, dans la médiation des savoirs. L’objectif est de définir les contours de ses interventions et de ses apports dans la formation (dispositifs pédagogiques qui visent notamment à renforcer l’efficacité de l’apprentissage et son lien avec le poste de travail), p...

  12. In the field of energy cost reduction, what is the potential?; En matiere de reduction des depenses d`energie: quel est le gisement?

    Energy Technology Data Exchange (ETDEWEB)

    Millet, B. [Departement Industrie, CEREN (France)

    1996-12-31

    Through a segmentation of the fuel and electric power consumptions in the various industrial sectors and energy consumption process types in France in 1990, the energy conservation potential in the French metalworking and mechanical industry is analyzed and its evolution up to 2005 is assessed. It is shown that the reduction potential amounts to 450 kTep or 20 percent of the metalworking and metallic construction industry energy consumption, with an important part for the out-of-process sector (space heating, compressed air production, lighting). In the process sector, important reductions could be realized in thermal treatments and metal heating prior forming

  13. Management of gas releases with greenhouse effect: which economical tools?; Maitriser les emissions de gaz a effet de serre: quels instruments economiques?

    Energy Technology Data Exchange (ETDEWEB)

    Lepeltier, Serge [Senat, Paris (France)

    2000-06-09

    The climatic change represents the most severe danger to the durable world development, public health and future prosperity. This document concerning the gas releases with greenhouse effect is a report of the Senate Planning delegation regarding the economic and fiscal tools envisaging abatement of releases of gases with greenhouse effect. These issues are presented in four chapters titled as follows: 1. Since the scientific evidencing, requirement of managing the releases of gas with greenhouse effect has been unanimously recognized at the summits of Rio (1992) and Kyoto (1997); 2. The economic theory suggests instruments for reducing the gas releases with greenhouse effect at a minimum cost; 3. Challenges and ways of international cooperation in the field of climatic change; 4. Joining the political will with the pragmatic use of the economic instruments at national scale. The document contains a synthesis of proposals directed towards the following goals: international negotiations relating to climatic change; creating the community framework of managing the gas releases resulting in greenhouse effect; establishing national measures for managing the gas releases leading to greenhouse effect; actions to be undertaken by the territorial collectivities.

  14. De quels ingénieurs parle-t-on ? Situation et trajectoires des ingénieurs des grandes écoles. Le cas du Maroc

    Directory of Open Access Journals (Sweden)

    Pierre Vermeren

    2009-05-01

    Full Text Available Cet article est consacré au cas des « ingénieurs de conception » marocains, formés la plupart du temps dans les grandes écoles françaises. Cette fraction des ingénieurs marocains (dont la majorité est formée dans les écoles d'ingénieurs du Maroc n'est pas loin de constituer une véritable aristocratie de fonction. Ce phénomène illustre la structure sociale très inégalitaire du Maroc et la stratification opérée par la monarchie (le Makhzen pour sélectionner ses élites, qui sont aujourd'hui des élites à la fois technocratiques et sociales. Cette domination des « technocrates » sur l'appareil d'Etat marocain, analysée ici à travers des publics étudiants de grandes écoles, s'accompagne de l'émergence d'une contre-élite sociale de contestation. Les écoles d'ingénieurs de second rang, peuplées par les éléments des classes moyennes, ont été le premier terreau des mouvements islamistes en milieu universitaire. Elles produisent aujourd'hui une contre-élite politique et sociale qui piétine aux portes du vrai pouvoir.

  15. Quels dispositifs de conseil pour l’agriculture familiale marocaine ? Réflexions pour une démarche de conception des dispositifs de conseil.

    Directory of Open Access Journals (Sweden)

    Patrick Dugué

    2014-03-01

    Full Text Available Dans le cadre de sa politique agricole actuelle structurée autour du Plan Maroc vert, L’Etat a engagé une réforme en profondeur du conseil agricole, service qui était essentiellement assuré par les Centres des Travaux et les Centres de Mise en Valeur. La Nouvelle Stratégie du Conseil Agricole prône d’associer aux services publics de conseil agricole des structures privées qui seront agréées par les pouvoirs publics. Sur la base de travaux de recherche et d’expertise, cet article aborde la diversification de l’offre de conseil (conseil technique mais aussi conseil de gestion pour les exploitations et les organisations professionnelles agricoles, conseil administratif et juridique, … et des publics cibles (chefs d’exploitations, les autres actifs familiaux, les responsables et salariés des organisations professionnelles agricoles, …. Il suggère de prendre en considération d’autres opérateurs actuels ou potentiels du conseil comme les agrofournisseurs, les organisations professionnelles agricoles bien structurées et les agro-industries. Au-delà de ces propositions, l’article aborde les principes d’une démarche générique de conception de dispositifs de conseil utile à tous les acteurs au niveau local, régional ou national.

  16. Estudio comparativo de la cavidad de acceso radicular en conductos curvos con limas de níquel-titanio y taladros de acero inoxidable

    OpenAIRE

    Oncins Rodríguez, J.; Pumarola Suñé, José; Canalda Sahli, Carlos

    2005-01-01

    El propósito de este estudio fue comparar la cantidad de dentina radicular removida y evaluar el mantenimiento de la forma del conducto tras la instrumentación de los dos tercios coronarios radiculares, utilizando instrumentos de acero inoxidable (taladros de Gates Glidden) y de níqueltitanio (limas GT Flare y limas Orifice Shaper). Un total de 42 dientes humanos extraídos con conductos radiculares curvos fueron divididos en tres grupos. Los conductos se instrumentaron mecánicamente usando ta...

  17. Aplicación de las membranas líquidas soportadas a la separación de Cobalto y Níquel

    OpenAIRE

    Martínez Martínez, Guillermo

    2009-01-01

    La actividad industrial es la principal fuente de riqueza de los países desarrollados, aunque el crecimiento industrial plantea dos problemas fundamentales, el agotamiento de los recursos naturales y la contaminación medioambiental. Como fruto de la actividad industrial se generan corrientes residuales contaminadas que han de ser gestionadas de forma adecuada en el fin de evitar la transferencia de la contaminación al medio natural, siendo uno de los casos más preocupantes de transferencia de...

  18. World Gas Prospects: Which Role for the Middle East? Perspectives mondiales du gaz naturel : quel rôle pourrait jouer le Moyen-Orient ?

    Directory of Open Access Journals (Sweden)

    Chabrelie M. F.

    2006-12-01

    Full Text Available Since the early 1970s, the policies of energy diversification that have been implemented in the industrialized countries and in many developing countries have enabled natural gas to regularly increase its role in the world energy balance. Thus, during the past twenty years, natural gas recorded the highest growth rate among fossil fuels, and its share in the energy market has gradually risen from 18. 9% in 1975 to 23% in 1997. Today, thanks to favorable economic and environmental factors, natural gas has become the fuel of choice on many markets. Indeed, gas is blessed with a certain number of favorable assets (abundant reserves, flexibility, high-performance uses which give it a major role in all energy demand forecast scenarios. The most spectacular development will indisputably take place in the power generation sector. Endowed with a considerable gas potential, the Middle East will represent an essential source of supply for many industrialized countries and several gas export projects, either by LNG tanker or by pipelines are currently being contemplated. During the past decade, the contribution of natural gas to the energy mix also grew substantially in most Middle Eastern countries. The increase in gas demand should continue at a sustained rate, mainly driven by the power generation sector, petrochemicals and energy consumption by the hydrocarbons industry. These promising prospects for gas demand in most of the markets in the region might lead to the development of an intra-regional network. However, although opportunities exist, the region will have to meet many challenges in order to contribute more largely to the world gas balance in the years to come. de diversification énergétique mises en Suvre dans les pays industrialisés et dans de nombreux pays en voie de développement depuis le début des années 1970 ont permis au gaz naturel d'accroître régulièrement sa présence dans le bilan énergétique mondial. Ainsi, au cours des vingt dernières années, le gaz naturel a enregistré le taux de croissance le plus élevé parmi les énergies fossiles, et sa part de marché est progressivement passée de 18,9 % en 1975 à 23 % en 1997. Aujourd'hui, des facteurs d'ordres économiques et environnementaux font du gaz naturel l'énergie de choix sur de nombreux marchés. Le gaz jouit en effet d'un certain nombre d'atouts (réserves importantes, flexibilité, utilisations performantes qui lui confèrent une place majeure dans tous les scénarios de prévision de demande énergétique. Le développement le plus spectaculaire se fera sans conteste dans le secteur électrique. Doté de réserves gazières considérables, le Moyen-Orient représentera une source d'approvisionnement essentielle pour bon nombre de pays industrialisés et plusieurs projets d'exportation de gaz par méthaniers ou par gazoducs sont déjà à l'étude. Par ailleurs, au cours des dix dernières années, la contribution du gaz naturel dans le bilan énergétique a augmenté de façon significative dans la plupart des pays du Moyen-Orient. La croissance de l'utilisation du gaz devrait se poursuivre à un rythme soutenu, en particulier sous l'influence du secteur électrique, de la pétrochimie et de l'autoconsommation de l'industrie pétrolière. Ces perspectives prometteuses de demande de gaz sur la plupart des marchés de la région pourraient conduire au développement d'un réseau de transport intrarégional. Toutefois, bien que des opportunités existent, elles ne doivent pas masquer les nombreux défis que cette région devra relever pour contribuer plus largement au bilan gazier mondial dans les années à venir.

  19. Investigación cinética de la oxidación térmica de sulfuros mixtos de níquel y cobalto

    Directory of Open Access Journals (Sweden)

    José N. Muñoz-Gómez

    2004-03-01

    Full Text Available La precipitación de sulfuros mixtos de Ni y Co constituye una de las etapas del proceso tecnológico carbonato- amoniacal en la industria niquelera Ernesto Guevara, ubicada en Moa; sin embargo, la rápida oxidación de estos sulfuros al entrar en contacto con el aire dificulta su almacenamiento y transportación. Se exponen los resultados de la caracterización química, por difracción de Rayos X y análisis mineragráfico de los sulfuros mixtos, y de la investigación cinética de la oxidación térmica de las muestras a régimen isotérmico y no isotérmico. Se determina el modelo más probable y los parámetros cinéticos de las transformaciones físico-químicas que tienen lugar en el proceso de oxidación. Se concluye que la oxidación del concentrado del sulfuro mixto sigue las etapas siguientes: eliminación de agua y amoniaco, degradación de los sulfuros superiores, formación de los sulfatos y la degradación de los sulfatos hasta óxidos. La degradación de los sulfuros hasta óxidos ocurre mediante el modelo de crecimiento bidimensional G1, siendo la etapa limitante la velocidad de difusión de los productos gaseosos a través de la capa de óxido en formación.

  20. La confrontation entre les ressources en eau et les besoins en eau en moyenne montagne cristalline. Quelles contraintes, quels acteurs et quelles politiques de gestion ?

    OpenAIRE

    Benmalek , Yohann

    2009-01-01

    Terrain d'étude : Parc Naturel Régional du Pilat, Syndicat du Pays du Gier, SICALA Antenne de Tence.; The objective of this Doctorate was to put in adequacy water resources and water requirements on average crystalline mountain through the example of the Country of Gier, the Regional Natural reserve of Pilat and S.I.C.A.L.A. "Antenna of Tence ". This work was realized in a space of low mountain range. It corresponds so in the middle geographical in the strict sense as in a space lived by a so...

  1. Nascita e destino della soggettività. Dai ruoli professionali ai processi di cura, attraverso una lettura di "Quel che resta del giorno" di Kazuo Ishiguro

    Directory of Open Access Journals (Sweden)

    Gabriele Profita

    2017-07-01

    Full Text Available Questa riflessione affronta un tema assai rilevante per le professioni di cura, con uno sguardo particolare alla psicoterapia. Per chiarire il ruolo della soggettività e della nascita e maturazione di un ruolo professionale riporterò un’analisi di un testo letterario attraverso il quale sarà più agevole scoprire come si forma l’identità di un ruolo professionale e come si avvia alla sua maturazione e alla sua codificazione. In particolare quali sono i rischi legati ad una sua rigida codificazione rivolta alla sua normatività tecnica? Mi propongo di tracciare un confronto con alcune forme di costruzione della soggettività che nel corso dei secoli hanno fondato il modello dell’uomo occidentale nelle sue articolazioni professionali.

  2. Respostas eletrofisiológicas das Porossensilas das quelíceras de Rhipicephalus microplus frente à fagoestimulantes e soros de bovinos

    OpenAIRE

    Ferreira, Lorena Lopes

    2013-01-01

    Carrapatos são ectoparasitas obrigatoriamente hematófagos de diversas espécies e estão distribuídos mundialmente. Seu parasitismo acarreta danos diretos e indiretos a seus hospedeiros. Rhipicephalus microplus é o principal ectoparasita da pecuária causando problemas econômicos e sanitários nas regiões tropicais e subtropicais. O seu controle ainda é um desafio e novas alternativas estão sendo buscadas para evitar o uso de métodos químicos que são condenáveis em relação à saúde ...

  3. Evidence based of chemoradiotherapy in cervix carcinoma; Chimioradiotherapie concomitante dans les cancers du col de l'uterus: quels niveaux de preuve?

    Energy Technology Data Exchange (ETDEWEB)

    Joly-Lobbedez, F. [CHU de la Cote-de-Nacre, 14 - Caen (France); CLCC Francois-Baclesse, Oncologie Medicale, 14 - Caen (France)

    2009-10-15

    Since 10 years, the combination of chemoradiotherapy has become a standard of treatment of the advanced localized cervical cancer. Two systematic reviews of the literature (including the results of the different clinical trials) have already been published. The aim of this article is to present the results of the recent meta-analysis based on individual patient data and to discuss the perspectives. This meta-analysis was rigorously designed: trials selected had the same control arm with the same radiotherapy without concomitant chemotherapy, the definition of the primary outcome (overall survival) was homogeneous and analysis was made in intent to treat. The results confirm the advantage in overall survival in favor of the chemoradiotherapy with an absolute 5-year overall survival benefit of 6% (60-66%) and 8% of 5-year disease-free survival (50-58%). Interestingly, even if cisplatin seems to be the most active drug, a significant advantage is also observed with no platinum chemotherapy. A polychemotherapy is not more active than a mono chemotherapy and there was a suggestion of a difference in the size of the survival benefit with tumor stage. Larger benefits were seen for the few trials in which additional chemotherapy was administered after chemoradiotherapy, but results have to be confirmed by other clinical trials. Late toxicity was not well evaluated and a long-term follow-up of the patients is important to assess the real incidence of long-term side effects of the chemoradiotherapy and the impact on quality of life. New strategies combining new chemotherapy protocols or targeted therapy with radiation are promising but have to be evaluated in comparative clinical trials before use in routine. (authors)

  4. Echantillonnage des prairies pâturées pour quantifier l'azote potentiellement lessivable : quel schéma pour quelle précision ?

    Directory of Open Access Journals (Sweden)

    Hennart S.

    2010-01-01

    Full Text Available Sampling scheme to quantify nitrogen leaching risk in grazed grassland: which scheme for which accuracy? In grazed grasslands, the heterogeneity of urine patches distribution needs adapted sampling scheme in order to evaluate N-NO3 - leaching risks. In such context, the aim of this paper is to define the accuracy that could be expected from the sampling scheme applied in this agro-ecosystem (one average sample including 30 core samples taken in the 0-30 cm soil layer and the sampling scheme to be applied in order to reach a pre-defined level of standard error. The data bases mobilized were mainly 78 grasslands sampled in 2004 or in 2005 in 24 dairy farms and 8 grasslands sampled during four years (2004 to 2007 in the experimental site in Gembloux. Our results underlined the significant increase of the standard deviation with the concentration mean. So, the mean explained 63 and 49% of the standard deviation increase observed, respectively, in 2004 and 2005. In such context, the sampling scheme applied in the Sustainable Nitrogen Management Program (one composite sample of 30 core samples taken in the 0-30 cm soil layer allowed to reach a precision of 10 kg N-NO3 -.ha-1 in 35% of the grazed grasslands sampled. To shift to three composite samples per hectare allows reaching such an accuracy in 90% of the parcels showing an average nitrite nitrogen content lower than 20 kg N-NO3 -.ha-1. For highest values, the samples number necessary to reach such a precision level increases quickly. In such context and in order to identify false positive parcels in audited farms, an important tolerance margin is defined around the threshold value. This value is defined yearly in farms integrating good practices in terms of nitrogen resources management. The use of alternatives indicators to evaluate N-NO3 -.ha-1 leaching risk is also evaluated.

  5. Quel futur pour les services écosystémiques de la forêt alpine dans un contexte de changement climatique ?

    Directory of Open Access Journals (Sweden)

    Benoît Courbaud

    2011-01-01

    Full Text Available La forêt de montagne produit de nombreux services écosystémiques qui vont être affectés par les changements climatiques. On attend une remontée des essences en altitude qui pourrait conduire à une diminution des résineux et des espèces du subalpin. Ces changements d’essences pourraient avoir un impact négatif sur la biodiversité et sur la production de bois d’œuvre. On observe cependant également une augmentation de la productivité favorable à la production de bois énergie et au moins temporairement de bois d’œuvre, ainsi qu’au stockage de carbone. Face à une augmentation possible des évènements climatiques extrêmes, les changements de végétation pourront être marqués par des épisodes de dépérissements, très négatifs pour la filière économique, la protection contre les risques naturels et la biodiversité. Le changement climatique affectera la forêt également de manière indirecte en augmentant la demande en énergie renouvelable et en stockage de carbone. Les incertitudes sur les prédictions de changements de végétation sont élevées, ce qui rend délicate la définition de stratégies d’adaptation de la gestion forestière. Une gestion de crises efficace, un accompagnement des évolutions naturelles de la forêt basé sur une interaction recherche-gestion (gestion adaptative, et la prise en compte explicite de la notion d’incertitude paraissent des éléments essentiels au maintien des services écosystémiques fournis par la forêt.Mountain forests produce a large number of ecosystem services that are going to be affected by climate change. We are expecting an increase in high altitude species that could result in the decrease in resinous and subalpine species. These changes in species could adversely affect biodiversity and timber production. However, we also observe an increase in productivity that favours the production of energy wood and, at least temporarily, timber, as well as carbon storage. Given the possible rise in extreme climatic events, changes in vegetation could be marked by periods of decline, which will be very detrimental to the economic system, protection against natural hazards and biodiversity. Climate change will also have an indirect effect on the forest by increasing the demand for renewable energy and carbon storage. There is a lot of uncertainty about vegetation change predictions and this makes it difficult to define forest management adaptation strategies. Effective crisis management, monitoring of natural transformations of the forest based on the interaction between research and management (adaptive management and the explicit factoring in of the concept of uncertainty appear to be essential to the maintenance of the ecosystem services provided by the forest.

  6. Quel effet de l’euro sur le commerce europeen des produits forestiers? Académie d’Agriculture de France, Notes Académiques

    Science.gov (United States)

    Joseph Buongiorno

    2015-01-01

    The objective of this study was to determine the effect of the monetary union on the trade of forest products between euro-using countries. A differential gravity model of bilateral trade flows was developed and estimated with data for the bilateral trade between 12 euro countries from 1988 to 2013, for commodity groups HS44 (wood and articles of wood), HS47 (pulp of...

  7. Sérologie palustre: quel apport dans un pays d’endémie palustre comme la Côte d’Ivoire?

    Science.gov (United States)

    Goran-Kouacou, Amah Patricia Victorine; Dou, Gonat Serge; Zika, Kalou Dibert; Adou, Adjoumanvoulé Honoré; Yéboah, Oppong Richard; Aka, Rita Ahou; Hien, Sansan; Siransy, Kouabla Liliane; N’Guessan, Koffi; Djibangar, Tariam Agnès; Dassé, Séry Romuald; Adoubryn, Koffi Daho

    2017-01-01

    Introduction La sérologie palustre semble avoir peu d’intérêt dans les pays d’endémie comme la Côte d’Ivoire. Cependant cet examen a été régulièrement réalisé au laboratoire de Parasitologie de l’Unité de Formation et de Recherche Sciences Médicales d’Abidjan. Le but de notre étude était d’apprécier l’apport de la sérologie palustre dans notre contexte de pays endémique. Méthodes Nous avons réalisé une étude rétrospective portant sur la sérologie palustre qui a utilisé le kit Falciparum spot-IF de Biomérieux à la recherche d’anticorps antiplasmodiaux d’isotype IgG. Elle a concerné les sérologies réalisées de janvier 2007 à février 2011 et dont les résultats étaient disponibles dans le registre. Résultats Au total, 136 patients ont été sélectionnés. L’âge moyen était de 36,3 ans avec des extrêmes de 1 an et 81 ans et un sex-ratio de 0,97. Les indications de sérologie palustre étaient variées, dominées par la splénomégalie (49,3%), les cytopénies (14,7%), la fièvre d’origine indéterminée (13,2%). La quasi-totalité des patients (98,5%) avaient des anticorps antiplasmodiaux avec un titre moyen élevé à 1057,35UI/ml. Il n’existait pas de lien entre l’âge et le titre d’Ac qui était plus élevé pour les cytopénies, les fièvres prolongées et la splénomégalie. Conclusion La sérologie palustre a peu d’intérêt dans notre pratique courante en zone d’endémie car quelque soit le motif de la prescription, les titres étaient élevés. PMID:28690735

  8. The nuclear energy of the future: the researches and the objectives; L'energie nucleaire du futur: quelles recherches pour quels objectifs?

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    Today energy problems are global problems. That is why the new generation of energy production by nuclear power must be realized basely on serious forecasts at a world scale. The nuclear energy presents many trumps for an energetic answer, at long-dated, concerning the environment and the resources. This will be for two main conditions: the ability to answer the public opinion anxiety and the development of new systems more high- performance in terms of safety and economy in the framework of the sustainable development and the non proliferation policy. These subjects are at the earth of the CEA missions. This document proposes a detailed presentation of the nuclear origins, the fuel and its cycle, the radioactive wastes and their management,the dismantling and the decommissioning of the nuclear installations, the challenges of the nuclear safety, the energy in the world, the nuclear economy, the nuclear in the world, the researches of the future, the third generation reactors, the research on radioactive wastes, the fuel cycle of the nuclear systems of the future, the uranium resources, the generation four forum, the gas coolant reactors, the thorium, hybrid systems and the thermonuclear fusion. (A.L.B.)

  9. The internationalization of the technological activities in the energy industries; L'internationalisation des activites technologiques dans les industries energetiques

    Energy Technology Data Exchange (ETDEWEB)

    Bourgeois, B. [Institut d' Economie et de Politique de l' Energie - IEPE-CNRS/ Universite Pierre Mendes-France, 38 - Grenoble (France); Jacquier-Roux, V. [Institut de Recherche Economique sur la Production et le Developpement -IREPD, 38 - Grenoble (France)

    2001-06-01

    This analysis of the technological internationalization factors is defined in five chapters. The first chapter deals with the evolutionist representation of the internationalization process of the technological activities of the firms. The chapter two is an historical synthesis from 1985 to 2000, of the industrial dynamics and of the technological strategies of the petroleum and electric power industries. The chapter three details the empirical method used to verify the hypothesis. Chapter four exposes the data analysis results of the patents of the sampled firms. The last chapter is devoted to the results interpretation. (A.L.B.)

  10. Energetic study of combustion instabilities and genetic optimisation of chemical kinetics; Etude energetique des instabilites thermo-acoustiques et optimisation genetique des cinetiques reduites

    Energy Technology Data Exchange (ETDEWEB)

    Martin, Ch.E.

    2005-12-15

    Gas turbine burners are now widely operated in lean premixed combustion mode. This technology has been introduced in order to limit pollutants emissions (especially the NO{sub x}), and thus comply with environment norms. Nevertheless, the use of lean premixed combustion decreases the stability margin of the flames. The flames are then more prone to be disturbed by flow disturbances. Combustion instabilities are then a major problem of concern for modern gas turbine conception. Some active control systems have been used to ensure stability of gas turbines retro-fitted to lean premixed combustion. The current generation of gas turbines aims to get rid of these control devices getting stability by a proper design. To do so, precise and adapted numerical tools are needed even it is impossible at the moment to guarantee the absolute stability of a combustion chamber at the design stage. Simulation tools for unsteady combustion are now able to compute the whole combustion chamber. Its intrinsic precision, allows the Large Eddy Simulation (LES) to take into account numerous phenomena involved in combustion instabilities. Chemical modelling is an important element for the precision of reactive LES. This study includes the description of an optimisation tools for the reduced chemical kinetics. The capacity of the LES to capture combustion instabilities in gas turbine chamber is also demonstrated. The acoustic energy analysis points out that the boundary impedances of the combustion systems are of prime importance for their stability. (author)

  11. Energy Research in Switzerland in 2005; Energie-Forschung 2005/Recherche energetique. Ueberblicksberichte der Programmleiter/Rapports de synthese des chefs de programme

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-05-15

    This very comprehensive annual report for the Swiss Federal Office of Energy (SFOE) contains the overview reports for the year 2005 that were made by the heads of the following Swiss energy research programmes: Efficient use of energy in buildings, traffic, vehicles and accumulators, electricity, ambient heat and combined heat and power generation, fuel cells, process engineering, solar heat and storage, photovoltaics, solar chemistry and hydrogen, biomass, small hydropower, geothermal energy, wind energy, nuclear safety and nuclear waste disposal, regulatory nuclear safety research, nuclear fusion and energy economy basics. In the following, just a selection of the large number of topics covered are mentioned. Under the topic of efficient energy use in buildings, the introduction of energy standards for buildings, labelling, component catalogues, passive dwellings, high-performance insulation systems, sustainable cities, 'Minergie' buildings, the use of solar energy are mentioned. In the building technologies area, electricity consumption, fuel cells and daylighting were looked at, as were airing, ventilation and hot-water preparation. A number of pilot and demonstration projects are noted. Traffic-related projects reported on include financial incentives for energy-efficient vehicles, the EU's 'cleaner Drive' project, infrastructures for gas fuels, gas-fuelled buses and various mobility projects. A review of drive systems is presented, including hybrid systems and a hydro-pneumatic recuperation system. Projects on small and lightweight vehicles are reviewed, including projects on bicycles and weather protection. The record-breaking PAC-Car project is noted. Developments concerning trolley-buses and electric cars as well as a driverless cabin-vehicle running on rails are noted. Accumulators and 'Zebra' batteries are noted. Electrical topics include high-temperature superconductors, thermo-electricity, power storage and transmission, energy efficiency in computer applications, home-automation, drives, electrical machines and lighting. National and international co-operation is commented on. In the heat-pump and combined heat and power area, heat-pump controllers, calculation software, various refrigerants and system optimisation are reported on as are combined heat and power units. Various pilot and demonstration projects are reported on. As far as combustion technology is concerned, work done is noted, including optical measurement methods and numerical simulation of combustion processes, reduction of pollutant emissions and innovative combustion systems. A selection of pilot and demonstration projects are reported on. National and international work done in the fuel-cell area is discussed. Industrial and process engineering projects are noted, including process integration in greenhouses as well as in paper and brick production and drying processes. In the solar energy area, the testing of solar collectors is discussed as are lightweight, flexible systems, simulation systems and building installations. Also, work done on high-temperature solar energy is noted. In the photovoltaics section, the wide range of Swiss work in this area is noted. Work done on thin-film cells, and VHF and other micro-crystalline and dye-based technologies are reported on, as is work done in the areas of building integration and electrical system technology. Various studies and projects are noted. Work done in co-operation with the IEA and the IEC and pilot and demonstration projects is noted. In the solar chemistry and hydrogen area, work done on solar water decomposition, solar-thermal production of zinc and hydrogen and its storage is reported on. The report on the biomass program takes a look at process optimisation, low particle emission firing systems, filters, organic pollutants in compost material and new conversion technologies for biomass. Various studies and concepts in the area are noted. Small hydropower issues reported on include the optimisation of turbines, innovations in the small turbine area as well as statistics and potential studies. A number of pilot and demonstration projects are noted. Some of the work listed in the geothermal area includes geo-cooling and pipe-'baskets' used as heat collectors. Also, measurement topics are discussed as are dimensioning and simulation systems. Pilot and demonstration projects are noted. Wind topics reported on include increasing acceptance of wind turbines, the development of innovative components and concepts and the monitoring of ice-formation on rotor blades. Nuclear energy topics include further work done on the STARS accident scenario project, human reliability, material behaviour as well as research on accidents and integral consideration of systems. A further report deals with regulatory safety research in the nuclear area and man-machine interaction as well as a number of further safety topics. Nuclear fusion is reviewed at an international level and work done in Switzerland is reviewed. Finally, the report on the fundamentals of Swiss energy economics reports on the potential for energy-refurbishment of buildings, traffic topics and cost-covering remuneration for electricity from renewables.

  12. Development of Quebec's energy in a sustainable development context : summary; Le developpement energetique du Quebec dans un contexte de developpement durable

    Energy Technology Data Exchange (ETDEWEB)

    Vaillancourt, K.; Lemieux, D.; Lambert, N.; Lachance, J.G. [Eco Ressources Consultants, Montreal, PQ (Canada); Bourque, F.; Benoit, P.A. [Reseau des ingenieurs du Quebec, Montreal, PQ (Canada)

    2009-04-30

    As a net energy importer, issues of energy security are becoming increasingly important in Quebec. Since Quebec's energy policy is largely based on the development of hydropower, its energy development has already been consistent with sustainable development. Industry remains the largest energy consumer in Quebec, followed by the transportation sector, and the residential, commercial and agricultural sectors. Total energy consumption in the province is expected to increase by 1.2 per cent annually between 2001-2016. Although competitive electricity prices in Quebec have contributed to strengthening the provincial economy, it has been argued that the low price of electricity does not promote energy efficiency nor the development of alternative energy sources. Quebec imports all of its crude oil and natural gas. Energy production in the province is currently confined to electricity generation and refining of petroleum products at 3 main refineries. In 2005, the installed electrical capacity was 92.2 per cent hydropower, 5.3 per cent thermal power, 1.5 per cent nuclear power, and 0.9 per cent wind power. The vast majority of this installed capacity (78 per cent) is owned by Hydro-Quebec. Wind capacity is expected to reach 3,500 MW by 2017, representing about 8 per cent of Quebec's total electrical capacity. Guidelines have been identified in Quebec's energy strategy for 2006-2015 to promote energy efficiency and innovation of new energy technologies covering all markets and all forms of energy, including geothermal energy, solar energy and ethanol produced from forest residues, agricultural wastes and municipal wastes. The government's overall goal is to generate both energy savings and a reduction in annual greenhouse gas emissions.

  13. Basic and energy physics: the multiple faces of energy; Physique fondamentale et energetique: les multiples visages de l'energie

    Energy Technology Data Exchange (ETDEWEB)

    Balian, R. [Academie des Sciences, 75 - Paris (France)

    2001-07-01

    After an historical presentation of the elaboration of the energy concept, this document recalls, first, the basic physical principles linked with this concept: first and second principle of thermodynamics, dynamics of irreversible processes, hierarchy of elementary interactions. Then, their consequences on energy problems are examined by comparing the different common types of energy from different points of view: concentration, degradation, transport, storage, reserves and harmful effects. These comparisons rely on the characteristic values of the data involved. (J.S.)

  14. Report on the national strategy of research in the energy domain; Rapport sur la strategie nationale de recherche dans le domaine energetique

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-05-15

    This report presents the energy situation in France and the place of the research in the energy policy. It discusses the political and legal context, the strategy orientations, the energy efficiency, the renewable energies, the fossil energies, the nuclear energy and the socio-economic factors. The actors of the energy research are detailed. (A.L.B.)

  15. Energy perspectives of France by 2020-2050. Technological evolutions; Perspectives energetiques de la France a l'horizon 2020-2050. Evolutions technologiques

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-09-15

    The different technologies in phase of research and development and concerning the energy production or storage, are examined and presented in function of their probability of emergence at the industrial level: the projects which are going to appear in planed time on the market, the projects based on known technologies which should appear but at non predicted date and the possible projects but based on a new technology. The different type of energy, from the fossil fuels to the renewable energies are concerned. (A.L.B.)

  16. National energy policy and fight against the greenhouse effect; Politique energetique nationale et lutte contre l'effet de serre

    Energy Technology Data Exchange (ETDEWEB)

    Prevot, H

    2004-02-01

    The fight against climate change will only be effective if it leads to cutting of greenhouse gas emissions by half, even though emissions from developing countries will be increasing considerably. It is therefore essential that emissions from the developed countries reduce. This article presents a scenario for reducing French emissions of carbonic gases by two-thirds over thirty years. The target of reducing by two-thirds could be achieved without totally unacceptable alterations in behaviour. Instead of increasing by 1 to 2 % per annum, ultimate energy consumption must stabilize, a historic change no doubt but one, which thanks to technological advances, does not preclude an improvement in heating comfort levels nor an increase of 30 to 40 % in the distances travelled by road or by air. On the other hand, there would be profound chances in energy producing and consuming equipment, which would generate a significant amount of activity in the economic sector. This would be activity related to the national territory and therefore not capable of be delocalized. Moreover, security of supply would be considerably improved because our economy could continue to function, even without any supplies of gas or petrol. It would obviously be preferable if France were not the only country to apply such a policy but the scenario shows that it could significantly reduce its emissions even if it were the only country to do so, because, for the most part, the measures to be taken fall under its own responsibility and, compared to the GDP are relatively moderate in cost. Our country could therefore, at the very least, take a leading position and be capable of training other countries. (authors)

  17. New energy and environmental paradigms: Europe's place; Les nouveaux paradigmes energetiques et environnementaux : la place de l'Europe

    Energy Technology Data Exchange (ETDEWEB)

    Rossetti Di Vadalbero, D. [Commission Europeenne (Belgium)

    2008-07-15

    The 'energy-climate change' association, is high on Europe's priority list. From a legal point of view, with the treaty of Lisbon, energy becomes the shared responsibility of the European Union and member countries, and the Commission offers to reinforce the greenhouse effect gas emission quota exchange system and promote sustainable energies. From an economic point of view, modelling studies show that the cost of failing to act on climate change will be much higher tomorrow than the cost of the measures passed today. From a geopolitical point of view, EU's gas supply plans (Nabucco, South Stream, TAP and North Stream) are representative of other stakes than merely energy and trade stakes. From a technological point of view, Europe is banking a lot on the fusion, capturing and storage of CO{sub 2} and hydrogen and fuel cells. Apart from the legal, economic, geopolitical and technological aspects, if Europe wants to maintain its role as a world leader in the areas of energy and climate change prevention, it needs to increase its efforts in terms of sustainable behaviours and development planning. Its image, security, competitiveness and environment depend on it. (author)

  18. The new legal basis of the EU's energy policy; La nouvelle base juridique de la politique energetique de l'UE

    Energy Technology Data Exchange (ETDEWEB)

    Farantouris, N.E. [Universite du Piree, Dept. d' Etudes Internationales et Europeennes (Greece)

    2011-01-15

    According to article 194 of the EU Lisbon Treaty, energy now falls within the province of European policy and is a sector for shared responsibility with member countries, in the same way as for the environment, transportation, the interior market and trans-European networks (article 4 of the Lisbon Treaty). The introduction in the Treaty of a chapter devoted to energy clearly has a political emphasis, as its shows the EU's attachment to the implementation of a coherent policy. However, its enactment carries with it not insignificant legal changes, because a specific and autonomous legal basis is established for the first time, thus allowing the Union to take decisions and actions in the area of energy. (author)

  19. French energetic perspective by 2020-2050. Synthesis report; Perspectives energetiques de la France a l'horizon 2020-2050. Rapport de synthese

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-09-15

    This report brings together the technical reflexions of the Energy Commission implemented by the strategical analysis center. Written in 7 chapters it presents the problematic; the energy policy facing the planetary challenges, the constraints, opportunities, cooperations and difficult integration of the french energy policy in the europe; the axis of a national energy policy; some simulation to light up the long dated choices and the implementing conditions of an ambitious energy policy. The last chapter concludes on recommendations for the french energy policy at a national but also community scale. (A.L.B.)

  20. Centralised and decentralised heat-pump systems considered from the energy and economics points of view; Chauffage central ou decentralise: perspectives energetiques et economiques

    Energy Technology Data Exchange (ETDEWEB)

    Hubacher, P.

    2006-07-01

    This article was one of ten papers that were presented at the 13{sup th} Conference of the Research Programme on Ambient Heat, Combined Heat and Power Systems and Cold-generation held at the University of Applied Sciences in Burgdorf, Switzerland in 2006. The conference was organised by the Swiss Federal Office of Energy (SFOE). In this paper, Peter Hubacher discussed the advantages and disadvantages offered by centralised and decentralised heat-pump systems from the energy and economics points of view. The use of such large heat-pump systems as a source of heating energy for district heating systems is discussed. The report presents the results of studies regarding pressure and heat loss, temperature differentials in the distribution network and in heat exchangers, which, according to the author, all have a direct influence on the heat pump's efficiency. The influences of these factors is examined. Also, the study takes a look at the large variations found in domestic hot-water preparation and the influence of secondary systems on overall heat-pump efficiency figures.