WorldWideScience

Sample records for atmospherique urbaine realisees

  1. Pieces Urbaines

    DEFF Research Database (Denmark)

    Skousbøll, Karin

    Parallelt med de store franske præstigeprojekter har en anden bybygningsstrategi udviklet sig, hvor man ser byens dynamik og naturlige fragmentering som et positivt alternativ til de absolutte helhedsplaner - en "Peices Urbaines"-metodik: Visionerne for en helhed kombineres med en fleksibilitet o...

  2. Situation of regional plans for air quality. Acknowledgement of sanitary aspects. Situation of realised impact studies of urban air pollution; Bilan des plans regionaux pour la qualite de l'air. Prise en compte des aspects sanitaires. Bilan des etudes d'impact de la pollution atmospherique urbaine realisees

    Energy Technology Data Exchange (ETDEWEB)

    D' Helf, M.; Cassadou, S

    2005-07-01

    The law on air and use of energy recommended in 1996 the implementation of regional plans for air quality (P.Q.R.A.) that have to rely on an evaluation of air pollution effects on health. 21 P.Q.R.A. have been published and the report gives the situation, their sanitary orientations and their applications. An inquiry lead in the 21 regions, near the different regional actors in the air and health field completes the report. (N.C.)

  3. Considering the sanitary aspects in regional plans for air quality. Situation of sanitary impacts of urban air pollution studies; Prise en compte des aspects sanitaires dans les Plans regionaux pour la qualite de l'air. Bilan des etudes d'impact sanitaires de la pollution atmospherique urbaine realisees

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-12-15

    The law on air and the rational use of energy of the 30. september 1996 forecasts the setting up of regional planning for the air quality that have to rely on the support of an evaluation of sanitary effects of air pollution. To help the local sanitary authorities in this mission, the National Institute of Sanitary Surveillance and the C.I.R.E. have realised a methodological guide on evaluation of sanitary impact of urban air pollution in different contexts. (N.C.)

  4. Institut Africain de Gestion Urbaine

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

    DALBERG

    agriculture urbaine, des déchets solides ... programme de concilier son travail quotidien qu'est l'exécution des projets à la recherche de nouveaux ... projets et programme portant sur la gestion des déchets, l'agriculture urbaine et la planification.

  5. Sanitary impact of the particulate atmospheric urban pollution; Impact sanitaire de la pollution atmospherique urbaine particulaire

    Energy Technology Data Exchange (ETDEWEB)

    Sentissi, M.

    1999-03-22

    The pollution of particulates origin is one of the principle actual problem relative to air quality. In France, the fine particulates come from industry and automobile traffic, especially, the diesel vehicles. The most worrying characteristic is their fineness, that allow them to stay in suspension during a long time and penetrate into pulmonary alveoli, with toxic elements at their surface such metals, acids, polycyclic aromatic hydrocarbons. The objective of this work is to take stock of epidemiology and toxicology studies evaluating the sanitary impact of particulates in suspension. (N.C.)

  6. 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 ...

  7. Marche du foncier urbain et promotion du logement au Benin ...

    African Journals Online (AJOL)

    Le marché du foncier urbain au Bénin est un secteur qui met en jeu l'intervention de plusieurs acteurs publics et privés mais également de l'informel. La notion de « foncier urbain » utilisée dans cet article englobe les acceptions et les utilisations faites en architecture, en urbanisme, en aménagement et en gestion urbaine.

  8. INTERMODALITE ET DEVELOPPEMENT URBAIN DANS L ...

    African Journals Online (AJOL)

    Administrateur

    Face à l'échec rejeté de toutes les politiques adoptées dans le processus du développement urbain de la ville d'Alger depuis la période coloniale et jusqu'à nos jours, force est de constater que les différents instruments d'urbanisme mis en place n'arrivent pas à venir à bout de toutes les contraintes de son site qui est très ...

  9. Agriculture urbaine et développement durable

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

    totalité de la croissance démographique se produira dans les villes des pays en développement. Si la tendance actuelle se maintient, 60 % de la population de la planète vivra en milieu urbain d'ici à 2030. Plus les villes grossissent, plus leur ...

  10. Développement durable de l'agriculture urbaine

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

    La gestion concertée et durable des filières maraîchères urbaines, Paule Moustier, Michel ..... avec des eaux usées, le plus souvent non traitées : dans quelle mesure cette agriculture peut-elle ...... Le contrôle des performances zootechniques

  11. Evaluation of sanitary impact of urban air pollution. Methodological guide.; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Guide methodologique

    Energy Technology Data Exchange (ETDEWEB)

    Glorennec, Ph.; Nourry, L [Cellule Inter-Regionale d' Epidemiologie (France); Quenel, Ph. [Institut National de Veille Sanitaire, 94 - Saint Maurice (France)] [and others

    1999-07-01

    The institute of sanitary watch has setting up an epidemiological surveillance plan in nine french towns in order to quantify and to keep a close eye to the relations existing between the urban air pollution and the populations health.The method is detailed with its advantages and its limits. (N.C.)

  12. Effects of urban air pollution on the inflammatory reaction: involvement of the chemokine pathways; Impact de la pollution atmospherique urbaine sur la reponse inflammatoire: implication des chimiokines

    Energy Technology Data Exchange (ETDEWEB)

    Fahy, O.

    2000-12-01

    Urban air pollution is both gaseous and particulate, and diesel exhausts are now the main source of particles. Diesel particles consist of a carbon core with multiple adsorbed organic compounds, among witch poly-aromatic hydrocarbons. These diesel particles and associated poly-aromatic hydrocarbons are likely to play a role in the recent increase in allergic diseases. In this study, we evaluated the effects of diesel organic extracts on the initiation and the orientation of the allergen-dependent inflammatory reaction by analyzing the dis-regulation of a family of mediators involved in cellular recruitment: the chemokines. We demonstrated that mononuclear cells and alveolar macrophages from normal subjects displayed a dis-regulation in pro-inflammatory chemokine expression and production (IL-8, MCP-1, RANTES) when exposed to diesel organic extracts. In addition we observed a synergy between the effects of diesel and allergen when cells from allergic patients were exposed to both simultaneously, leading to a strong over-production of chemokines, and to the increased capacity of recruiting effector cells such as neutrophils and eosinophils. The MAP kinase pathways seemed largely involved in the transduction of diesel and allergen stimulus, since a specific inhibition almost abolished the dis-regulation of chemokine production. Diesel and allergen also appeared to favour the establishment of a type 2 immune response (pro-allergenic), by preferentially recruiting Th2 lymphocytes via the dis-regulation of chemokine expression (MDC and IP-10). Finally, the humanized SCID mouse model grafted with autologous human skin allowed the in vivo evaluation of a local over-production of chemokine, by analyzing the cellular recruitment in the skin after intra-dermal injection of recombinant chemokines. This model appears useful for the study of the mechanisms of cellular recruitment by chemokines and the potential therapeutic approaches. In conclusion, our study underlines the deleterious effects of a combined exposure to diesel and allergen on an essential parameter of the inflammatory reaction potentially responsible for the recruitment and activation of an increased number of immune cells, and thus the aggravation of allergic patient symptoms. (author)

  13. Malaise dans la pensée urbaine.

    Directory of Open Access Journals (Sweden)

    Jacques Lévy

    2004-09-01

    Full Text Available Le numéro de mars-avril 2004 de la revue Esprit présente un dossier consistant (272 pages sur la ville. L’idée de se représenter le monde urbain de France et d’ailleurs en trois strates, trois auréoles et trois vitesses, correspond à une perception spontanée que ne démentent pas les études savantes : les centres, les banlieues populaires et le périurbain constituent bien une tripartition des espaces urbains. Ce constat sert de trame générale au numéro. Mais ici s’arrête ...

  14. Biofloculation des boues résiduaires urbaines

    OpenAIRE

    Hocine , Houria; OLIVIER , Jérémy; Debab , Abdelkader

    2017-01-01

    International audience; La déshydratation mécanique des boues résiduaires urbaines passe généralement par une étape de floculation utilisant des polymères chimiques. Dans une stratégie de préservation de l'environnement, l'utilisation de floculants naturels est une voie à explorée. Dans cette étude, nous testons le pouvoir floculant du jus issus des cladodes du figuier de barbarie et le jus d'une autre plante succulente sur une boue activée urbaine issue d'une station d'épuration située à Ora...

  15. Grafmeyer Yves, Authier Jean-Yves, Sociologie urbaine

    Directory of Open Access Journals (Sweden)

    Anaïs Van Sull

    2011-02-01

    Full Text Available Yves Grafmeyer et Jean-Yves Authier ont consacré la plupart de leurs travaux de recherche aux questions de l’espace urbain et de la socialisation qui y prend place. L’ouvrage qu’ils proposent, enrichi et actualisé par rapport à la première édition, aborde les différents objets, méthodes et problématiques qui peuvent être insérés dans le champ de la sociologie urbaine. S’ils reconnaissent une large part d’arbitraire dans les concepts et courants retenus, on ne peut que se réjouir des nouvelles...

  16. Les métamorphoses du marketing urbain.

    Directory of Open Access Journals (Sweden)

    Marc Dumont

    2006-02-01

    Full Text Available Si le marketing urbain n’est pas récent, il est important d’interroger les effets qu’a pu ou non avoir l’irruption du numérique sur ce phénomène, tant au niveau de ses modalités, de ses modes de structurations, que des problématiques de la production de la ville dans lesquelles il s’inscrit. L’intérêt d’évoquer cette question à partir d’un site internet développé exclusivement pour un quartier tertiaire émargeant à deux projets urbains importants, Euronantes.fr, ...

  17. Violence urbaine, déplacements, genre et liens communautaires ...

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

    20 oct. 2017 ... Lorsque les liens communautaires mènent aux crimes violents. Exploration de la cohésion sociale et de la méfiance envers l'État à titre de facteurs incitant à la violence urbaine. five pregnant african women. Les rôles sexospécifiques et la violence dans les villes. Une croissance rapide et des identités ...

  18. étude du dilemme urbain : urbanisation, pauvreté et violence

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

    croissance urbaine, de même que sur l'appauvrissement et les inégalités en milieu urbain. Elle montre aussi ...... comme Rio de Janeiro, Port-au-Prince, Beyrouth,. Kingston et ...... Guide for Improving Water Supply and Sanitation Services,.

  19. Interaction entre zones urbaines et rurales et changements ...

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

    Ce projet vise à réduire la vulnérabilité des systèmes ruraux-urbains du Nigeria face aux changements climatiques en diffusant les résultats du projet pilote mené dans la ville d'Aba, dans le sud-est du pays, et les environs. L'équipe du projet aidera le comité de conseillers-superviseurs d'Aba à déterminer les bonnes ...

  20. Quelles valeurs pour revaloriser les territoires urbains ?

    Directory of Open Access Journals (Sweden)

    Camille Tiano

    2010-05-01

    Full Text Available La notion de revalorisation territoriale est difficile à définir précisément puisqu’elle correspond à la fois à des valeurs chiffrables, qui permettent de dresser des palmarès socio-économiques, mais également à des valeurs intangibles liées aux représentations et aux expériences différenciées que les citadins ont des espaces urbains. De fait, les valeurs mises en avant par les différentes opérations urbaines sont très variables : des valeurs de rupture structurent l’action et l’image de l’opération Euralille, des valeurs méthodologiques sont à l’œuvre dans le projet Neptune à Dunkerque et des valeurs clichés et fluctuantes peinent à caractériser l’opération Euroméditerranée. Aussi hétérogènes soient-elles, les valeurs sont au cœur du processus opérationnel de revalorisation, en alimentant les conflits, en structurant les récits et en légitimant les figures politiques.

  1. Agriculture urbaine en Afrique de l'Ouest : Une contribution à la ...

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

    Agriculture urbaine en Afrique de l'Ouest : Une contribution à la sécurité alimentaire et à l'assainissement des villes. Couverture du livre Agriculture urbaine en Afrique de l'Ouest : Une contribution à la. Directeur(s):. Olanrewaju B. Smith. Maison(s) d'édition: CTA, CRDI. 1 janvier 1999. ISBN : Épuisé. 240 pages. e-ISBN :.

  2. Les métropoles et la nouvelle critique urbaine

    Directory of Open Access Journals (Sweden)

    Pierre Hamel

    2010-07-01

    Full Text Available La perspective critique élaborée par Henri Lefebvre demeure pertinente pour penser les rapports sociaux à l’espace, y inclus ceux qu’on observe dans les métropoles contemporaines en Amérique du Nord. En examinant la controverse autour de la forme urbaine telle que celle-ci a été remise à l’ordre du jour dans les années 1990 à la faveur du discours néorégionaliste, ce texte pose la question de l’avenir des métropoles et du modèle de ville dans lequel on souhaite vivre. La thèse défendue peut se résumer comme suit : afin de faire échec à la position libérale qui accorde la préséance aux facteurs économiques et aux forces du marché, les acteurs sociaux doivent porter le débat autour de la forme urbaine sur le terrain politique. À cette fin, l’urgence demeure de mobiliser la communauté politique.Henri Lefebvre’s critical approach remains appropriate for thinking about social relationships to space, including those we can now assess in North American metropolis. Through analyzing the controversy about the urban form as it has been highlighted again during the nineties and favored by the new regionalist discourse, this paper poses the question of the future of metropolis and the posterity of the urban model in which one wishes to live. Its thesis could be summarized like this : in order to make fail the liberal position which privileges to economical factors and market forces, social actors have to orientate the debate about the urban form towards the political field. In such a perspective, the emergency remains to mobilize the polity.

  3. Studies on solid-state physics carried out with the Saclay reactor (1962); Etudes de physique du solide realisees a la pile de Saclay (1962)

    Energy Technology Data Exchange (ETDEWEB)

    Herpin, A [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1962-07-01

    This paper deals only with solid-state physics experiments carried out on outgoing beams: rather than giving a general review of the work performed, if refers to only a few of the most important studies or those nearest completion. These are being made with the experimental beams of the two Saclay reactors EL-2, with a central flux of 10{sup 13} n/cm{sup 2}, and - since 1958 - EL-3, whose central flux is equal ta 10{sup 14} n/cm{sup 2}. The experiments are being carried out by two separate groups of physicists, employing different techniques, namely neutron diffraction using a crystal spectrometer, and inelastic scattering using a time-of-flight spectrometer. (author) [French] Cet expose ne relate que des experiences de physique du solide faites sur des faisceaux sortis; plutot que de donner une revue de l'ensemble des travaux effectues, on ne cite que quelques etudes que l'on peut considerer comme plus essentielles ou mieux achevees. On utilise les faisceaux experimentaux des deux piles de Saclay, EL-2 dont le flux au centre est de 10{sup 13}n/cm{sup 2} et, depuis 1958, EL-3 pour laquelle il est egal a 10{sup 14} n/cm{sup 2}. Les experiences sont realisees par deux groupes de physiciens distincts, employant des techniques differentes, la diffraction des neutrons qui utilise un spectrometre a cristal, et la diffusion inelastique avec un spectrometre a temps de vol. (auteur)

  4. Centralisation et polarisation: l'aire urbaine de Mamoudzou et les villages mahorais

    Directory of Open Access Journals (Sweden)

    Didier Benjamin

    2001-12-01

    Full Text Available Depuis deux décennies, les structures économiques et sociales de Mayotte subissent de profondes mutations. L’aire urbaine de Mamoudzou, point d’entrée des marchandises, concentre les personnes, les activités et les investissements et domine l’ensemble de l’archipel, devenu «banlieue» du pôle urbain nord-oriental. Les flux convergent vers ce centre dont le pouvoir de diffusion et de redistribution vers les deux finisterres qui l’encadrent reste limité.

  5. La politique de tarification des Transports Publics Urbains en Île-de-France

    OpenAIRE

    OUATTARA, Christophe

    2015-01-01

    À l'heure du débat environnemental et de l'émergence des modes alternatifs à l'usage de la voiture particulière (covoiturage, autopartage, vélo, marche, etc.), les transports collectifs urbains sont porteurs des orientations politiques en faveur de la mobilité durable. Facteurs de cohésion sociale et garants du droit au transport pour tous, ils constituent également une solution de taille face à la congestion du trafic urbain. Cela est rendu possible par la mise en place d'une politique de ta...

  6. Violences et exclusions urbaines en République Démocratique du ...

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

    massive dans ces deux villes et une croissance de la criminalité urbaine en sont les conséquences majeures. En milieu rural, face à la misère et à l'insécurité insupportables, un exode de masse s'opère vers les périphéries des villes. Cet exode a contribué à un étalement urbain irrégulier et non planifié ainsi qu'à la ...

  7. Approches de l'utilisation des eaux usées urbaines dans l ...

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

    8 févr. 2011 ... Quant aux systèmes de traitement des eaux financés par le CRDI qui utilisent la laitue d'eau à Dakar ... les eaux usées dans les cultures de salade, produit qui se mange cru. » .... Rompre le cycle de la pauvreté urbaine.

  8. Populations, espace et infrastructures : réduire la violence urbaine ...

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

    Populations, espace et infrastructures : réduire la violence urbaine et favoriser la justice à Mumbai, Rio et Durban. Dans notre monde en ... Despite constitutional guarantees, violence both within and outside the home is an ever-present threat and an everyday reality for a large majority of women and girls across India.

  9. Donner une voix aux pauvres en milieu urbain : les chiffonniers de ...

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

    2 mars 2018 ... Pour les pauvres en milieu urbain de Bolivie, il est essentiel d'adopter des « stratégies de survie » pour gagner un revenu supplémentaire qui compense les salaires bas et précaires.

  10. Agriculture urbaine en Afrique de l'Ouest / Urban Agriculture in West ...

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

    Stratégies politiques pour l'agriculture urbaine, rôle et responsabilité des ... Cet atelier fut l'occasion de mettre en œuvre une stratégie pour développer le ...... il faut signaler simplement un recrutement dans la tranche des plus de 55 ans.

  11. Améliorer le rendement des zones urbaines dans le contexte du ...

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

    ... dans la croissance des entreprises, ainsi que dans la question connexe de ... qu'il appellera l'indice de performance des zones urbaines aux fins de cette analyse. ... privé et l'utilisation efficace des ressources publiques limitées du Kenya.

  12. Incontinence urinaire de la femme en milieu urbain au Burkina Faso ...

    African Journals Online (AJOL)

    Incontinence urinaire de la femme en milieu urbain au Burkina Faso: Enquête épidemiologique auprès de 759 femmes à Bobo Dioulasso. ... showed that the following risk factors were significantly associated with urinary incontinence: dystocia, repeated urinary tract infections, chronic constipation, episiotomy and obesity.

  13. Protection de la communauté urbaine de Cotonou face aux ...

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

    IDRC Officer. Robertson, Melanie. Total funding. CA$ 324,600. Country(s). Africa, Benin, South of Sahara. Project Leader. Euloge Ogouwalé. Institution. Centre de Recherche et d'expertise pour le développement local. Institution Country. Benin. Outputs. Reports. Protection de la Communauté Urbaine de Grand Cotonou ...

  14. La Résilience urbaine : un nouveau concept opérationnel vecteur de durabilité urbaine ?

    Directory of Open Access Journals (Sweden)

    Marie Toubin

    2012-06-01

    Full Text Available Le concept de résilience réinterroge la façon de penser le système urbain et ses perturbations. Appliqué à la ville, il peut être défini comme la capacité d'un système urbain à absorber une perturbation et à retrouver ses fonctions à la suite de cette perturbation. Dès lors, l’opérationnalité du concept passerait par la nécessité d’adapter le fonctionnement du système urbain tout comme ses composants aux perturbations potentielles, à reconstruire le système urbain suite à une perturbation majeure ou à définir des modalités de gestion de crise en intégrant la complexité même de la ville. Ainsi le concept de résilience appliqué à la ville semble trouver des traductions opérationnelles, notamment en matière de services urbains, qui répondent également aux objectifs de durabilité. En partant de l’analyse des définitions des deux concepts de durabilité et de résilience appliqués à la ville, l’objectif de cet article est de s’interroger sur la façon dont s’articulent les concepts de résilience et de ville durable puis de proposer des outils et méthodes contribuant à la résilience de la ville dans une optique de durabilité, avant d’en étudier les limites.Urban resilience questions the way we think urban systems and disturbances. Applied to cities, resilience is the ability of a city to absorb a disturbance and recover its functions after the disturbance. Then, urban systems need to adapt their functioning and their components to possible disturbances. In managing the crisis and organizing the recovery process, the complexity of urban systems must also be taken into account. Then, it seems that translating the theoretical concept of resilience into practice is possible if functioning, interactions, disturbances and stakeholders are analyzed together, which should contribute to urban sustainability at the same time. Urban services are a relevant case study in doing so. We first review the

  15. Émeutes urbaines, sentiments d’injustice, mobilisations associatives

    Directory of Open Access Journals (Sweden)

    Éric Marlière

    2011-07-01

    Full Text Available Cet article a pour objectif l’appréhension des répertoires de mobilisations politiques des jeunes dits « des cités ». Pour cela, il faut nous intéresser aux modes de vie de ces jeunes structurés depuis plus de trente ans maintenant autour du chômage et de la précarité et des nouvelles formes de ségrégation. Cette situation engendre chez les jeunes une certaine frustration sociale se manifestant sous la forme d’un sentiment d’injustice plus ou moins diffus. Si les émeutes urbaines constituent le mode d’action le plus médiatique, un certain nombre de jeunes adultes originaires « des cités » réagissent à travers un ensemble d’initiatives associatives nationales et locales comme le montrent les dernières échéances électorales.Urban riots, feeling of injustice and associative mobilizationsThis article’s objective are the understanding of the directories of the political youth called “cities”. For this, we must concern ourselves with life’s styles of the young people structured over 30 years now about unemployment and job insecurity and new forms of segregation. This creates youth frustration manifested as a feeling of injustice more or less diffuse. If the urban riots of action in the most media, a number of young adults from the “cities” are responding through a number of national associations and local initiatives as evidenced by the recent elections.Revueltas urbanas, sentimientos de injusticia, formas asociativasEste artículo tiene como objetivo el aprehender las diferentes formas de las movilizaciones políticas de los jóvenes de los barrios desfavorecidos. Para cumplirlo es necesario que nos interesemos por las maneras de vivir de esos jóvenes cuyas vidas se desarrollan dentro del paro, la precariedad y nuevas formas de segregación. Esta situación engendra una gran frustración social con conciencia más o menos difusa de ser víctimas de injusticias. Si las revueltas urbanas constituyen la

  16. Caracterisation environnementale des emissions atmospheriques d'une source fixe et creation d'un outil de gestion dynamique =

    Science.gov (United States)

    Fournier, Marie-Claude

    Une caracterisation des emissions atmospheriques provenant des sources fixes en operation, alimentees au gaz et a l'huile legere, a ete conduite aux installations visees des sites no.1 et no.2. La caracterisation et les calculs theoriques des emissions atmospheriques aux installations des sites no.1 et no.2 presentent des resultats qui sont en dessous des valeurs reglementaires pour des conditions d'operation normales en periode hivernale et par consequent, a de plus fortes demandes energetiques. Ainsi, pour une demande energetique plus basse, le taux de contaminants dans les emissions atmospheriques pourrait egalement etre en dessous des reglementations municipales et provinciales en vigueur. Dans la perspective d'une nouvelle reglementation provinciale, dont les termes sont discutes depuis 2005, il serait souhaitable que le proprietaire des infrastructures visees participe aux echanges avec le Ministere du Developpement Durable, de l'Environnement et des Parcs (MDDEP) du Quebec. En effet, meme si le principe de droit acquis permettrait d'eviter d'etre assujetti a la nouvelle reglementation, l'application de ce type de principe ne s'inscrit pas dans ceux d'un developpement durable. L'âge avance des installations etudiees implique la planification d'un entretien rigoureux afin d'assurer les conditions optimales de combustion en fonction du type de combustible. Des tests de combustion sur une base reguliere sont donc recommandes. Afin de supporter le processus de suivi et d'evaluation de la performance environnementale des sources fixes, un outil d'aide a la gestion de l'information environnementale a ete developpe. Dans ce contexte, la poursuite du developpement d'un outil d'aide a la gestion de l'information environnementale faciliterait non seulement le travail des personnes affectees aux inventaires annuels mais egalement le processus de communication entre les differents acteurs concernes tant intra- qu'inter-etablissement. Cet outil serait egalement un bon

  17. Stratégie de survie et culture de jeunes dans les marchés urbains ...

    African Journals Online (AJOL)

    Cet article porte sur la vie quotidienne des adolescentes travailleuses dans les marchés urbains et péri-urbains de Dakar, capitale du Sénégal. Elle vise à approfondir la compréhension et la connaissance sur les stratégies de survie et la socialisation des jeunes dans les rues des villes sénégalaises et sur les logiques de ...

  18. L'amélioration du milieu urbain et la réinstallation sont des moyens ...

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

    18 févr. 2015 ... Quelle est l'efficacité des efforts déployés en Afrique du Sud pour améliorer ses centres urbains, modifier ses environnements urbains et espaces publics, donner des services aux victimes de violence et faire participer directement les collectivités touchées par la violence aux mesures de réduction de la ...

  19. Protection of personnel against atmospheric contamination by plutonium in the laboratory (1963); Protection du personnel contre la contamination atmospherique par le plutonium, dans les laboratoires (1963)

    Energy Technology Data Exchange (ETDEWEB)

    Feliers, P; Pomarola, J; Risselin, A [Commissariat a l' Energie Atomique, Fontenay-aux-Roses (France). Centre d' Etudes Nucleaires

    1963-07-01

    Various problems about measurement of atmospheric contamination by plutonium in laboratories are considered. In particular are studied sampling methods, continuous measurement for alarm, criteria used for fixation of the concentrations to be measured, sensitivity of apparatus and effects of natural atmospheric contamination. The means actually available for measurement of contamination and their limits of use are briefly analysed. (authors) [French] Les differents problemes a resoudre pour realiser un controle satisfaisant de la contamination atmospherique par le plutonium, dans les laboratoires, sont abordes. On etudie en particulier les differents modes d'echantillonnage, le controle continu en vue de l'alarme, les criteres qui servent a la fixation des concentrations a mesurer, la sensibilite a donner aux moyens de mesure, les difficultes provenant de la contamination atmospherique naturelle. Les moyens actuellement disponibles pour le controle de la contamination et leurs moyens limites d'emploi sont analyses sommairement. (auteurs)

  20. Atmospheric corrosion of uranium-carbon alloys; Corrosion atmospherique des alliages uranium-carbone

    Energy Technology Data Exchange (ETDEWEB)

    Rousset, P; Accary, A [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1965-07-01

    The authors study the corrosion of uranium-carbon alloys having compositions close to that of the mono-carbide; they show that the extent of the observed corrosion effects increases with the water vapour content of the surrounding gas and they conclude that the atmospheric corrosion of these alloys is due essentially to the humidity of the air, the effect of the oxygen being very slight at room temperature. They show that the optimum conditions for preserving U-C alloys are either a vacuum or a perfectly dry argon atmosphere. The authors have also established that the type of corrosion involved is a corrosion which 'cracks under stress' and is transgranular (it can also be intergranular in the case of sub-stoichiometric alloys). They propose, finally, two hypotheses for explaining this mechanism, one of which is illustrated by the existence, at the fissure interface, of corrosion products which can play the role of 'corners' in the mono-carbide grains. (authors) [French] Les auteurs etudient la corrosion des alliages uranium-carbone de composition voisine du monocarbure; ils montrent que l'importance des effets de la corrosion observee augmente avec la teneur en vapeur d'eau du milieu gazeux ambiant et concluent que la corrosion atmospherique de ces alliages est due essentiellement a l'humidite de l'air, l'action de l'oxygene de l'air etant tres faible a la temperature ambiante. Ils indiquent que les conditions optimales de conservation des alliages U-C sont le vide ou une atmosphere d'argon parfaitement desseches. D'autre part, les auteurs etablissent que le type de corrosion mis en jeu est une corrosion 'fissurante sous contrainte', transgranulaire (pouvant egalement etre intergranulaire dans le cas d'alliages sous-stoechiometriques). Ils proposent enfin deux hypotheses pour rendre compte de ce mecanisme, dont l'une est illustree par la mise en evidence, a l'interface des fissures, de produits de corrosion pouvant jouer le role de 'coins' dans les grains de

  1. Les défis de la gouvernance urbaine à Manille

    OpenAIRE

    Boquet, Yves

    2018-01-01

    La région capitale des Philippines est une des plus grandes aires urbaines du monde en termes de population. Le périmètre officiel du Grand Manille (17 municipalités) abrite environ 12 millions d’habitants et l’expansion périmétropolitaine porte le chiffre réel de Manille à 15 ou 16 millions d’habitants.La rapide croissance de l’aire urbaine depuis les années 1960 a conduit à de gros problèmes de gestion du logement, de la circulation, des déchets et des risques d’inondation, entre autres. Le...

  2. La cohésion sociale : une solution ou un moteur de violence urbaine ...

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

    La cohésion sociale : une solution ou un moteur de violence urbaine ? 28 septembre 2016. Image. un policer qui gère une foule. Shaun Swingler. COLLECTION: HISTOIRE À SUCCÈS | VILLES SÛRES ET INCLUSIVES. La cohésion sociale peut jouer un rôle important dans l'établissement et le maintien de l'ordre dans les ...

  3. Données probantes pour la réduction de la violence urbaine au ...

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

    28 sept. 2016 ... Image. Favela de Prazeres. FLICKR / Dany13. COLLECTION: HISTOIRE À SUCCÈS | VILLES SÛRES ET INCLUSIVES. Quelles stratégies fonctionnent — et ne fonctionnent pas — pour réduire la violence dans les centres urbains ? Pour répondre à cette question, l'initiative Villes sûres et inclusives ...

  4. Armer les villes contre la faim : Systèmes alimentaires urbains ...

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

    Le XXe siècle a été le témoin d'une croissance massive des populations urbaines. ... On y explore le rôle que les structures existantes de marketing et de distribution peuvent jouer pour améliorer l'accessibilité, les systèmes de distribution alimentaire en émergence et leur apport éventuel à l'élimination de la faim dans les ...

  5. Étude du dilemme urbain : urbanisation, pauvreté et violence | IDRC ...

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

    24 mai 2012 ... En 2007, le monde est devenu une société à prédominance urbaine où, selon les estimations, les villes totalisent les trois quarts de la production économique. L'urbanisation offre aux populations la perspective d'un meilleur accès à l'emploi et la possibilité de jouir de biens et de services, et ce, tant dans ...

  6. Comprendre et prévenir la violence urbaine à Kinshasa | CRDI ...

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

    13 nov. 2015 ... Elle décompose la dynamique entre la migration des milieux ruraux vers les milieux urbains, la pauvreté et l'inégalité, qui est la clé permettant de comprendre les liens qui existent entre l'urbanisation sans précédent et la hausse de la criminalité et de la violence dans les grandes villes de l'Afrique ...

  7. L'agglomeration oranaise jeux d'acteurs et dynamique urbaine ...

    African Journals Online (AJOL)

    L'agglomération oranaise connaît actuellement une croissance urbaine importante entraînant des évolutions économiques et socioculturelles considérables. Partant de là, une question nous interpelle: Quels sont les mécanismes à la base de la dynamique d'urbanisation, les processus de restructuration et de ...

  8. Coopération entre milieux ruraux et urbains dans la gestion de l'eau ...

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

    Coopération entre milieux ruraux et urbains dans la gestion de l'eau face aux changements climatiques au Burkina Faso. Les villes dépendent fortement des milieux ruraux qui leur assurent un apport en produits alimentaires, en eau et en matières premières. Les changements climatiques, en augmentant la fréquence des ...

  9. Evaluation of sanitary impact of urban air pollution. Agglomeration of Bordeaux impact at short and long term; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Agglomeration de Bordeaux impact a cour et long terme

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-06-15

    A health impact assessment of air pollution based on the I.n.V.S. guidelines has been conducted in Bordeaux area. Atmospheric pollution indicators analyzed were ozone, nitrogen dioxide and particles having diameter below 10 {mu}m. Short term impact of atmospheric pollution has been estimated in term of mortality (total, cardiovascular and respiratory mortality) and hospital admissions (for respiratory, cardiovascular and cardiac reasons) attributable to air pollution. Long-term impact was also assessed by the number of deaths due to atmospheric pollution. The study has been carried out in 22 cities homogeneously exposed belonging to Bordeaux agglomeration, representing a study population of 604,238 inhabitants. In 2001, the atmospheric pollution has directly been responsible in the studied area of 56 anticipated deaths, including half for cardiovascular reasons and 7 for respiratory reasons. Regarding morbidity, 29 hospital admissions for respiratory disease were attributable to air pollution in 2002, including two-thirds among elderly people (aged 65 years and over). Further more, 81 hospitalizations for cardiovascular diseases that occurred in 2002 were attributable to air pollution, including 27 for cardiac reasons. A decrease by 25% of the pollutants could have allowed avoiding about half of the premature deaths and hospital intakes attributable to air pollution. Concerning long term effects, about 200 annual deaths are attributable to chronic exposure to air pollution, and a decrease by 5{mu}g/m{sup 3} of the annual mean of PM{sub 10} could allow avoiding half of these deaths. The results have to be interpreted with care because of the limits of the H.I.A. method. However, they show that air pollution has a non negligible impact even in a city like Bordeaux where target values are mostly respected. They also show that reducing air pollution can have a significant impact in term of mortality and morbidity. However, a policy of atmospheric pollution reduction only based on not exceeding the standard levels would not have the expected benefits on the public health point of view, and to decrease at the source the every day pollutants emission would be more efficient. (author)

  10. Evaluation of sanitary impact of urban air pollution. Agglomeration of Bayonne impact at short and long term; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Agglomeration de Bayonne impact a cour et long terme

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-06-15

    A health impact assessment of air pollution based on the I.n.V.S. guidelines has been conducted in Bayonne according to the regional Plan for the quality of air in the region of Aquitaine. It has been carried out in 16 cities homogeneously exposed, belonging to Bayonne agglomeration, representing a study population of 148,742 inhabitants. Atmospheric pollution indicators analyzed are ozone, nitrogen dioxide and particles having diameter below 10 {mu}m. Short-term impact of atmospheric pollution has been estimated in term of mortality (total, cardiovascular and respiratory mortality) and on hospital intakes (for respiratory, cardiovascular and cardiac reasons) attributable to air pollution. Long term impact was also assessed by the number of deaths due to atmospheric pollution. In 2001, the atmospheric pollution has directly been responsible in the studied area for 20 anticipated deaths. A decrease by 25% of the pollutants could allow avoiding half of the premature deaths and hospital intakes attributable to air pollution. Concerning long term effects, a decrease by 5 {mu}g/m{sup 3} of the annual mean of PM{sub 10} could allow avoiding 32 deaths per year. These results should be interpreted with care because of the limits of the method. However, they show that air pollution impact is non negligible even in a small agglomeration like Bayonne, since everyone is exposed to air pollution. They also suggest that a policy of atmospheric pollution reduction only based on not exceeding the standard levels would not have the expected benefits on the public health point of view. To decrease at the source the everyday and total pollutants emissions would be more efficient. (author)

  11. Evaluation of sanitary impact of urban air pollution. Montpellier area impact at short and long term; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Zone de Montpellier impact a court et long terme

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    The assessment of the health impact of urban atmospheric pollution in Montpellier agglomeration has been carried out as part of the development of atmosphere protection plan. The study, based on the four standardised steps of health risk assessment, has two objectives. First of all, it aims at assessing the short-term impact of atmospheric pollution on mortality (total, cardiovascular and respiratory mortality) and on hospital intakes (for respiratory, cardiovascular and cardiac reasons). Second, the long-term impact is assessed by the number of deaths due to atmospheric pollution. On the other part, the computation of the expected health gain, as a function of different scenarios of atmospheric pollutants reduction, can allow to plan air quality improvement measures. The assessment of atmospheric pollution impact has been carried out in eleven cities, homogeneously exposed, belonging to Montpellier agglomeration (Castelnau-le-Lez, Clapiers, Le Cres, Grabels, Jacou, Juvignac, Montferrier-sur-Lez, Montpellier, Saint-Clement-de-Riviere, Saint- Jean-de-Vedas, Vendargues). It is based on the analysis of mortality figures during two years (1999 and 2000) and of hospital intakes during four years (from 1999 to 2002). The studied population is made up 288.059 inhabitants. Atmospheric pollution indicators analysed are ozone, nitrogen dioxide, sulphur dioxide and particles having diameter below 10 {mu}m. Every year, the atmospheric pollution is directly responsible in the studied area of 34 anticipated deaths, among including 13 for cardiovascular reason and 4 for respiratory reason. For morbidity, it generates every year 79 hospital admissions for cardiovascular reason, 15 for cardiac reason, 9 for respiratory reason for older than 65 years old people and 4 for 15-64 years old people. Older than 65 years old people are proportionally more impacted. These events could theoretically be avoided with pollution levels in the order of those reached the less polluted days. Health gains connected with a reduction of the pollution have been computed according to two scenarios. The short term health gains are lower with a suppression of the pollution peaks than with a 25% decrease of the background pollution. The long-term health gains are also more important when the mean levels of pollution are decreased by 25% (40 deaths avoided) or by 5 {mu}g/m{sup 3} (37 deaths avoided) than an annually decrease according to the European standards levels of 2010 (20 deaths avoided). Even for low exposure levels, the health impact of the atmospheric pollution has already been shown from another source. This study does not aim at showing it, but at quantifying this impact at the local extent. It also aims at allowing authorities to establish a policy for the reduction of the pollution based on local health arguments. Anyway, a policy of atmospheric pollution reduction only based on not exceeding the standard levels would not have the expected benefits on the public health point of view. To decrease at the source the every day and total pollutants emissions would be more efficient. The atmospheric pollution in Montpellier agglomeration is mainly due to road traffic. These emissions should be decreased first of all. (author)

  12. Evaluation of urban air pollution impact. Brest and Nantes impact at long term; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Brest et Nantes impact a long terme

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    The assessment for Brest and Nantes of the health impact in 1999 of chronic exposure to air pollution relies on four stages: health outcome identification, the selection of exposure-response functions, exposure assessment and risk characterization. The study characterizes: - the health gain due to a 25% decrease in air pollution levels; - the expected health impact of a 15% rise in air pollution levels. The results give the number of deaths attributable to air pollution. As for the health gain, the gain in days of life expectancy is also calculated. The study for Brest relies on one single exposure-response function. Concerning Nantes, the air control network is more complete and allows to use four exposure-response functions. The health gain due to a 25% decrease in air pollution levels is interpreted as a prudent evaluation of the health impact of air pollution. The estimated number of deaths due to the impact is around 38 (23 - 53) for Brest and around 40 (14 - 65) for Nantes. It means a decrease in the lifespan of 48 (29 - 68) days for Brest and 51 (17 - 84) days for Nantes. The uncertainty about exposure evaluation, the use of American exposure-response functions and of strong hypotheses to calculate the lifespan reduction generate more errors and uncertainty than for short term health impact assessment. (author)

  13. Evaluation of the sanitary impact of urban air pollution. Update version of the methodological guide; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Version actualisee du guide methodologique

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-03-15

    In order to bring a help to the evaluation of effects of air quality on health, the Institute of Sanitary surveillance published in 1999 a method guide for the realisation of sanitary impact evaluations of the urban air pollution. This work to prepare to an update version of the guide presents the first recommendations that can be made today for the realisation of sanitary impact evaluations at short and long term at a local level, taking into account the knowledge evolution. (N.C.)

  14. Evaluation of sanitary impact of urban air pollution. Agglomeration of Agen impact at short and long term; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Agglomeration d'Agen impact a court et long terme

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    A health impact assessment of air pollution based on the I.n.V.S. guidelines has been conducted in Agen according to the regional Plan for the quality of air in the region of Aquitaine to assess short term effects of pollutants on morbidity (hospital admissions in 2002) and mortality (deaths in 2001), and long-term effects on mortality. This study is based on the four standardised steps of health risk assessment. It has been carried out in 8 cities homogeneously exposed, belonging to Agen agglomeration, representing a study population of 60,515 inhabitants. Atmospheric pollution indicators analysed are ozone and particles having diameter below 10 {mu}m. Short-term impact of atmospheric pollution has been estimated in term of mortality (total, cardiovascular and respiratory mortality) and on hospital intakes (for respiratory, cardiovascular and cardiac reasons) attributable to air pollution.Long-term impact was also assessed by the number of deaths due to atmospheric pollution. In 2001, the atmospheric pollution has directly been responsible in the studied area of 4 anticipated deaths, including 2 for cardiovascular reason. A decrease by 25% of the pollutants could allow avoiding 2 premature deaths per year among the 4 attributable to air pollution. Concerning long-term effects, a decrease by 5 {mu}g/m{sup 3} of the annual mean of P.M.10 would allow avoiding 11 premature deaths per year. The results of this study should be interpreted with care because of the limits of the method. However, they show that air pollution can have a health impact even in a small city like Agen, since everyone is exposed to air pollution. (author)

  15. Evaluation of sanitary impact of urban air pollution. Agglomeration of Pau impact at short and long term; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Agglomeration de Pau impact a cour et long terme

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    A health impact assessment of air pollution based on the I.n.V.S. guidelines has been conducted in Pau according to the regional Plan for the quality of air in the region of Aquitaine. Short-term effects of pollutants on morbidity (hospital admissions in 2002) and mortality (deaths in 2001) have been estimated. Long-term effect on mortality was also assessed. This study is based on the four standardised steps of health risk assessment. It has been carried out in twenty-nine cities homogeneously exposed, belonging to Pau agglomeration, i.e. a study population of about 150,000 inhabitants. Atmospheric pollution indicators analysed are ozone, nitrogen dioxide, and particles having diameter below 10 {mu}m. Short-term impact of atmospheric pollution has been estimated in term of mortality (total, cardiovascular and respiratory mortality) and on hospital intakes (for respiratory, cardiovascular and cardiac reasons) attributable to air pollution. Long term impact was also assessed by the number of deaths due to atmospheric pollution. In 2001, the atmospheric pollution has directly been responsible in the studied area for 17 anticipated deaths, including 7 for cardiovascular reason and 2 for respiratory reason. Concerning morbidity, it generated 20 hospital admissions for cardiovascular reason in 2002, 11 for cardiac reason, and 7 for respiratory reason among elderly people. Regarding long-term health gains, an annually decrease according to the European standards levels of 2010 could allow avoiding 12 deaths per year, and a decrease by 30% of the pollutants could allow avoiding 33 premature deaths per year. This study shows that, even if the relative risks associated to air pollution are quite low, the number of attributable cases is non negligible since everyone is exposed to air pollution. It also shows that a policy of atmospheric pollution reduction only based on not exceeding the standard levels would not have the expected benefits on the public health point of view. To decrease at the source the every day and total pollutants emissions would be more efficient. (author)

  16. Evaluation of urban air pollution impact. Agglomeration of Toulon impact at short and long term; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Agglomeration de Toulon impact a cour et long terme

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    A health impact assessment of air pollution based on the I.n.V.S. guidelines has been conducted in Toulon according to the Regional Plan for the quality of air in the region of Provence-Alpes-Cote d Azur. Short-term effects on morbidity (hospital admissions) and mortality and long-term effects on mortality were estimated. Four cities were included in the study area: Toulon, La Garde, La Seyne-sur-mer and La Valette-du-Var (population: 267.808 inhabitants. Two periods of study have been defined: 1999 for the mortality analysis and 2000 for the morbidity analysis and the long- term effects. For 1999, number of advanced deaths due to air pollution is around 84 for total mortality including 30 deaths due to cardio-vascular diseases and 10 deaths due to respiratory diseases. The different scenarios of air pollution reduction showed that the most effective ones are those which lead to reduce of 25% the mean of the involved pollutant. Regarding long-term effects, the different scenario showed that the respect of the European Community limits value for the year 2010 would allow to avoid 118 deaths over one year. Results showed that air pollution are even resulting in health effects for some levels of pollution lower than current French limits. The most effective actions should therefore associate reduction of the source emissions on a daily basis and decrease of the over-limits levels of pollution. (author)

  17. Evaluation of sanitary impact of urban air pollution. Agglomeration of Perigueux impact at short and long term; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Agglomeration de Perigueux impact a court et long terme

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-15

    A health impact assessment of air pollution based on the I.n.V.S. guidelines has been conducted in Perigueux according to the regional Plan for the quality of air in the region of Aquitaine. It has been carried out in 5 cities homogeneously exposed, belonging to Perigueux agglomeration, representing a study population of 52,948 inhabitants. Atmospheric pollution indicators analysed are ozone, nitrogen dioxide and particles having diameter below 10 {mu}m. Short-term impact of atmospheric pollution has been estimated in term of mortality (total, cardiovascular and respiratory mortality) and on hospital intakes (for respiratory, cardiovascular and cardiac reasons) attributable to air pollution. Long term impact was also assessed by the number of deaths due to atmospheric pollution. In 2001, the atmospheric pollution has directly been responsible in the studied area for 5 anticipated deaths. A decrease by 25% of the pollutants could allow avoiding half of the premature deaths and hospital intakes attributable to air pollution. Concerning long term effects, a decrease by 5 {mu}g/m{sup 3} of the annual mean of P.M.10 could allow avoiding 10 deaths per year. These results should be interpreted with care because of the limits of the method. However, they show that air pollution can have an impact even in a small agglomeration like Perigueux, since everyone is exposed to air pollution. They also suggest that a policy of atmospheric pollution reduction only based on not exceeding the standard levels would not have the expected benefits on the public health point of view. To decrease at the source the every day and total pollutants emissions would be more efficient. (author)

  18. Epidemiological surveillance - air and health. Surveillance of effects on health linked to air pollution; Surveillance epidemiologique air et sante. Surveillance des effets sur la sante lies a la pollution atmospherique en milieu urbain

    Energy Technology Data Exchange (ETDEWEB)

    Quenel, Ph; Cassadou, S; Eilstein, D; Filleul, L; Le Goaster, C; Le Tertre, A; Medina, S; Pascal, L; Prouvost, H; Saviuc, Ph; Zeghnoun, A [Institut National de Veille Sanitaire, 94 - Saint Maurice (France); Declerq, Ch [Observatoire Regional de Sante Nord Pas de Calais (France)

    1999-03-01

    In the field of air pollution, the France is the first country to be endowed with a device of epidemiological surveillance allowing to to evaluate and monitor the impact of urban air pollution on the health of population. This new approach is based on the analysis of relationship between pollution indicators and health indicators, it leads to confirm the partnership between actors of environment and health, at the national level as well at the local level. It confirms the development of assessment in the field of environmental health. (N.C.)

  19. Evaluation of sanitary impact of the urban air pollution. Avignon area impact at short and long term; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Zone d'Avignon impact a court et long terme

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    An health impact assessment of air pollution based on the I.n.V.S. guidelines has been conducted in Avignon according to the Regional Plan for the quality of air in the region of Provence Alpes Cote d'Azur. Short term impact of atmospheric pollution has been estimated in term of mortality (total, cardiovascular and respiratory mortality) and hospital admissions (for respiratory, cardiovascular and cardiac reasons) attributable to air pollution. Long-term impact was also assessed by the number of deaths due to atmospheric pollution. The study has been carried out in seven cities homogeneously exposed belonging to Vaucluse (Avignon, Le Pontet, Morieres les Avignon, Sorgues and Vedene) and two cities of the Gard department (les Angles and Villeneuve les Avignon) representing a study population of 153,624 inhabitants. Two period of study have been defined: period 1999-2000 for short and long term evaluations on the mortality and the year 2001 for the morbidity analysis. This study rests on methodological principles of E.I.S. (evaluation of sanitary impact) of urban air pollution whom methodology is in four steps: identification of dangers, exposure estimation, choice of exposure-risk relationship and risk characterisation. The pollutions indicators are built from four pollutants nitrogen dioxide, ozone, sulfur dioxide and PM{sub 10}. The exposure-risk relationships used come from epidemiological studies realised in general population, by preferring the multi centers studies and European ones. The number of deaths by year due to air pollution is 23, whom 10 by cardiovascular diseases, 2 by respiratory diseases. The most efficient scenario are these ones corresponding to air pollution decreases of 25% in the considered pollutant. About the long term sanitary benefits, the different scenario show that the European norm forecasted for 2005 is respected. The respect of the European norm expected for 2010 should allow to avoid 10 deaths on the totality of registered deaths on a year, whereas a 25% decrease of the year average should allow to avoid 25 ones. According to the uncertainties and limits of the used methodology, the results must be interpreted as order of magnitude of the impact of air pollution on population health in the studied area. This study shows that even if the risks relative to air pollution are low, the proportion of exposed persons leads to a non negligible impact on mortality. It shows that sanitary effects appear at levels under that these ones actually measured and then the most efficient measures would be these ones that would associate a reduction of emissions at the source with an important reduction of the pollution peaks number. (N.C.)

  20. Engagement militant et politisation des mobilisations au sein des oppositions urbaines à Istanbul

    Directory of Open Access Journals (Sweden)

    Clémence Petit

    2011-07-01

    Full Text Available La Municipalité du Grand Istanbul met en œuvre depuis quelques années une « politique de transformation urbaine » pour faire d’Istanbul une ville moderne et compétitive sur la scène mondiale. Les mobilisations locales et les mouvements protestataires se multiplient pour infléchir une politique qui domine aujourd’hui l’agenda urbain « néolibéral » et empêcher les démolitions et déplacements de population escomptés. Au-delà de la distance au politique généralement affichée – condition de légitimité dans le système sécuritaire mis en place en Turquie après le coup d’État de 1980 – ces « oppositions urbaines » sont traversées par des débats sur la place du politique dans la mobilisation. À partir de l’étude sociologique de deux associations de quartiers et de deux mouvements de « professionnels urbains », cette contribution analyse le travail de définition des cadrages et répertoires d’action propres à chaque mouvement. Elle fait apparaître le rôle de ces professionnels urbains dans la requalification politique du désaccord qui divise les oppositions urbaines entre une stratégie « experte » et une stratégie plus politique. L’analyse met néanmoins en évidence le caractère dynamique et relatif – en termes de contextes et d’échelles – des stratégies d’appropriation des politiques publiques locales et des processus de politisation des « mouvements urbains ».The Istanbul Greater Municipality has been implementing for a few years numerous ‘urban renewal projects’ to change Istanbul into a modern and competitive city on the global scene. Reacting to the demolitions and evictions of entire neighbourhoods caused by these projects, some inhabitants and ‘urban professionals’ mobilize within new movements and neighbourdhood associations. Beyond the distance they usually show towards politics – a condition of legitimacy in the securitarian system introduced in

  1. Sprawl urbano em Londrina e os desafios para o planejamento urbano Sprawl urbain à Londrina et ses défis pour la planification urbaine

    Directory of Open Access Journals (Sweden)

    Osvaldo Coelho Pereira Neto

    2011-07-01

    Full Text Available A urbanização dispersa, os instrumentos de planejamento e gestão urbanos como o zoneamento e as zonas de expansão urbana têm se mostrado cada vez mais coerentes ao direcionar as cidades para um futuro incerto e caótico. Os perímetros urbanos dos municípios têm sido utilizados cada vez mais em favor dos agentes reprodutores do espaço urbano desigual acirrando o processo de segregação sócio-espacial, a formação de vazios urbanos e a especulação imobiliária. Inerente a esse processo, a infraestrutura, um dos componentes mais importantes da terra urbana e que mais custam para o Poder Público, ficam cada vez mais dispersos e obsoletos no meio de uma ocupação desordenada do solo da cidade. A partir disso, este trabalho propõe analisar o fenômeno do sprawling urbano na cidade de Londrina através das geotecnologias e identificar quais os impactos que a forma de ocupação que a cidade tem se guiado podem provocar no cenário atual e futuro do município na sua totalidade. Para tanto, foram confeccionados mapas temáticos de múltiplas fontes e através da bibliografia pesquisada identificou-se que o município de Londrina possui intensas características do fenômeno sprawling trazendo conseqüências para o ordenamento territorial e a distribuição espacial igualitária dos serviços essenciais a população.L'étalement urbain, les instruments de planification et de gestion urbaine comme le zonage et le zonage de l’expansion urbaine semblent mener les villes vers un futur incertain et chaotique. Les périmètres d’urbanisation des municipalités sont de plus en plus utilisés en faveur des agents producteurs d’un espace urbain inéquitable, accentuant le processus de ségrégation socio-spatiale, le maintien de terrains vacants et la spéculation foncière. Conséquemment, les réseaux d’infrastructure, composantes urbaines essentielles qui constituent une des plus importantes sources de dépenses publiques, s

  2. The distribution, atmospheric transfer, and assessment of krypton-85; Distribution, transfert atmospherique et bilan du krypton-85

    Energy Technology Data Exchange (ETDEWEB)

    Pannetier, R [Commissariat a l' Energie Atomique, 92 - Fontenay-aux-Roses (France). Centre d' Etudes Nucleaires

    1968-06-01

    Techniques for sampling and measuring krypton-85 have been developed which allowed to determine its geographical distribution. From its use as a tracer, an evaluation of the air masses which cross over the subtropical fronts has been derived. Besides, the stratospheric character of air pollution by krypton-85 at the level of the antarctic soil has been shown out. Levels of krypton-85 seem to point out to an underestimation of the assessment of nuclear explosion fission energies as adopted by the United Nations Scientific committee on the effects of atomic radiation and emphasize the need to set limits as soon as possible to the amounts of krypton-85 released to the atmosphere by fuel-reprocessing plants. (author) [French] La mise au point de techniques de prelevement et de mesure du krypton-85 atmospherique a permis de determiner sa repartition geographique. De son utilisation comme traceur on deduit une evaluation des masses d'air qui traversent les fronts subtropicaux. Par ailleurs, le caractere stratospherique de la pollution de l'air par le krypton-85 au niveau du sol antarctique est mis en evidence. Le bilan du krypton-85 semble reveler une sous-estimation du bilan des energies de fission des explosions adopte par le Comite scientifique des Nations Unies et souligne la necessite de limiter des que possible les quantites de krypton-85 rejetees dans l'atmosphere par les usines de traitement de combustibles irradies. (auteur)

  3. Cités horticoles en sursis ? L'agriculture urbaine dans les grandes ...

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

    Face à la crise des systèmes de production agricole ruraux, l'agriculture urbaine, notamment l'horticulture et l'élevage, est devenue une activité en pleine expansion. Ce secteur absorbe une partie de l'exode rural, contribue au développement d'activités génératrices de revenus et bénéficie d'une situation privilégiée grâce ...

  4. Espaces urbains, Espaces publics, Paroles et interprétations des habitants

    OpenAIRE

    Bonaccorsi, Julia; Boulekbache-Mazouz, Hafida; Côté, Jean-François; Cotte, Dominique; Da Lage, Émilie; Delcambre, Pierre; Gellereau, Michèle; Labelle, Sarah; Laudati, Patrizia; Mendes De Barros, Laan; Meyer, Vincent; Noyer, Jacques; Pugliese, Maude; Raoul, Bruno; Soumagnac, Karel

    2014-01-01

    Si les questions urbaines traversent de nombreux champs disciplinaires, le dossier de ce numéro s’inscrit dans une perspective communicationnelle en proposant comme focale l’analyse des dispositifs qui permettent la production, l’expression, la constitution des mémoires, des imaginaires, des interprétations des habitants de la ville ou ceux qui convoquent une référence à ces derniers. La réflexion sur les notions d’habitant et d’espace public est au cœur du dossier. Il s’agit de s’intéresser ...

  5. L'urbain trans-formé par Internet et les TIC

    OpenAIRE

    Carmes, Maryse; Noyer, Jean-Max; Rigal, Alexandre

    2014-01-01

    On découvre en pensant leurs pratiques dans l'espace urbain que les Technologies de l'Information et de la Communication sont probablement mal nommées. Il n'y aurait pas de mise en forme unilatérale et fixe, d'information, mais bien des trans-formations des acteurs et des pratiques des outils entre eux, en particulier par la communication. De la prise en compte de ces pratiques variées, des mélanges de codages spatiaux et digitaux qui s'inter-relient en certains acteurs, en certains lieux et ...

  6. Densité, morphologie urbaine et qualité de vie. Une approche par le projet

    OpenAIRE

    Occhiuto, Rita; Goossens, Marc; Fisher, Axel

    2013-01-01

    La recherche "Densification des tissus urbanisés en Wallonie: forme, acceptabilité et modalités pour accompagner la mutation des tissus bâtis" s'articule en plusieurs volets thématiques, parmi lesquels figure le volet "formes urbaines, modes d'habitat". Ce dernier volet est abordé selon deux approches parallèles et complémentaires qui se valident mutuellement: la première dite "par le projet" (approche qualitative et opérationnelle) et la seconde par analyse statistique et cartographique (ap...

  7. Une représentation symbolique de communication urbaine: le graffiti

    Directory of Open Access Journals (Sweden)

    Luciano Spinelli

    2008-07-01

    Full Text Available Nous avons l’intention d’observer une lecture sémiologique de l’espace urbain à travers l’étude des graffitis qui servent ici, d’analogie à la subjectivation que le citadin fait de son espace du vécu quotidien. Leurs graffitis sont intégrés à d’autres signes proposés par l’État et par l’initiative privée qui composent ainsi l’apparence loquace de la ville polyphonique.

  8. Intermodalite et developpement urbain dans l'agglomeration d'alger ...

    African Journals Online (AJOL)

    Face à l'échec rejeté de toutes les politiques adoptées dans le processus du développement urbain de la ville d'Alger depuis la période coloniale et jusqu'à nos jours, force est de constater que les différents instruments d'urbanisme mis en place n'arrivent pas à venir à bout de toutes les contraintes de son site qui est très ...

  9. La gestion des déchets urbains : Des solutions pour l'Afrique | CRDI ...

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

    Les situations à Abidjan, Dar es Salaam, Ibadan et Johannesburg y sont décrites, comparées et évaluées et les différentes formes typiques de gouvernance y sont présentées ainsi que leurs échecs et leurs réussites du point de vue de la lutte contre le problème crucial de l'augmentation des déchets urbains. Cet ouvrage ...

  10. Le logement social urbain et la dynamique spatiale. Stratégie des acteurs décideurs à Oran (1990-2000)

    OpenAIRE

    Said, Aïmène

    2013-01-01

    Le constat établi depuis plus d’une décennie, sur la ville d’Oran, fait état d’un mouvement de développement urbain assez intense. Cette dynamique urbaine bien que périphérique se caractérise par une production massive de logements. Avec ses diverses configurations immobilières, le logement social tient une place centrale dans cette production, pour devenir et de loin, le premier consommateur foncier. Notre article tente de suivre l’apport des filières de logement social dans le tracé urbain....

  11. La ville selon Babar: espace urbain et ville-modèle dans les années 1930

    Directory of Open Access Journals (Sweden)

    Laurent GRISON

    1997-03-01

    Full Text Available L'analyse de deux représentations urbaines présentes dans les albums pour enfants de Jean de Brunhoff nous permet de mettre en évidence la diffusion des recherches géographiques et urbanistiques dans les années 1930.

  12. Monument et espace urbain. Pour une Sémiotique des parcours et des structures de la ville

    Directory of Open Access Journals (Sweden)

    Ruggero Ragonese

    2012-11-01

    Cependant, partant de cet exigu corpus bibliographique, on peut chercher des bases pour commencer un travail sur le texte architectural, à partir de l'étude de monuments, capable de décrire le processus de transformation urbaine et les formes de l'espace construit.

  13. 329 Diversité végétale urbaine et estimation du stock de carbone ...

    African Journals Online (AJOL)

    TOSHIBA

    Diversité végétale urbaine et estimation du stock de carbone : cas de la commune du Plateau ... Urban plants diversity and carbon stock estimation: the case of Plateau district. Abidjan, Côte d'Ivoire ..... [15] - R. HOME; C. KELLER; P. NAGEL; N. BAUER et M. HUNZIKER, Selection criteria for flagship species by conservation ...

  14. La gestion de l'eau dans les milieux urbains et ruraux, élément ...

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

    La gestion de l'eau dans les milieux urbains et ruraux, élément fondamental des villes qui savent s'adapter aux changements climatiques ... Climate change and urbanization will have both upstream and downstream implications for African cities, mainly the urban demand for potable water and water for agriculture and the ...

  15. De fragments en totalité : le paysage, un analyseur des mondes urbains. Introduction

    Directory of Open Access Journals (Sweden)

    Laurent Matthey

    2009-10-01

    Full Text Available De la campagne à la ville En 1802, K.G. Schelle se proposait, dans un court traité, d’examiner « la palette des impressions procurées par les promenades » pour en « augmenter et multiplier » le plaisir (1802 : 23. Par son propos, ce traité constitue un gué vers un art de se promener en milieu urbain, une manière de s’y mouvoir, une façon d’y vivre. Il constitue un des nombreux points d’entrée du paysage dans l’univers de la ville. L’auteur s’y attachait, par exemple, à fonder la nécessité de...

  16. La place de la biodiversité dans les documents de planification urbaine en France

    Directory of Open Access Journals (Sweden)

    Fernanda Moscarelli

    2016-12-01

    Full Text Available La prise de conscience par les acteurs sociaux et politiques des enjeux environnementaux et de la nécessité de conservation de la biodiversité va conduire à de nouvelles politiques et à l’utilisation d’outils de planification territoriale novateurs comme le Schéma de Cohérence Territorial (SCoT. Le SCoT est l’instrument central de l’aménagement communautaire urbain français, qui associe le rôle d’assemblage de plusieurs politiques sectorielles et de coordination multi-scalaire aux objectifs de conception de villes durables. Il est donc souhaité que les SCoTs soient capables: (a d’améliorer les procédures d’aménagement par l’instauration de territoires de planification mieux adaptés aux enjeux, (b d’élargir le dialogue entre acteurs et société civile et (c d’agir pour la “soutenabilité” des villes. Nous nous interrogeons ici sur la prise en compte de la biodiversité dans les stratégies et prescriptions mises en place par les SCoTs de la Communauté d’Agglomération de Montpellier et de la Région Urbaine Grenobloise. A partir d’une analyse empirique, nous prétendons identifier les stratégies prescrites et les limites de ces documents d’urbanisme en ce qui concerne ces stratégies et leur application, la pertinence des périmètres de projet et d’action.

  17. Appréhender le territoire urbain en Méditerranée (XVIIe-XIXe siècles

    Directory of Open Access Journals (Sweden)

    Thierry Allain

    2012-02-01

    Full Text Available « Qui fait la ville ? Pour qui ? » La double interrogation lancée par Jean-Claude Perrot dans l’introduction de son ouvrage magistral paru en 1975 est toujours aussi pertinente. Elle indiquait de façon éclatante que l’espace urbain ne devait plus être considéré comme un simple décor, un cadre neutre, un poste d’observation comme un autre, censé refléter les évolutions de toute nature affectant l’Europe des Temps modernes. Sensible au renouvellement de l’espace urbain caennais au XVIIIe siècle...

  18. Urban Combat Advanced Training Technology Architecture (Architecture de technologie avancee pour l’entrainement au combat urbain)

    Science.gov (United States)

    2018-01-01

    NORTH ATLANTIC TREATY ORGANIZATION SCIENCE AND TECHNOLOGY ORGANIZATION AC/323(MSG-098)TP/740 www.sto.nato.int STO TECHNICAL...REPORT TR-MSG-098 Urban Combat Advanced Training Technology Architecture (Architecture de technologie avancée pour l’entraînement au combat urbain...NORTH ATLANTIC TREATY ORGANIZATION SCIENCE AND TECHNOLOGY ORGANIZATION AC/323(MSG-098)TP/740 www.sto.nato.int STO TECHNICAL

  19. Pauvreté, inégalités et violence en milieu urbain en Inde : vers un ...

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

    Le présent projet permettra de déterminer de quelle manière la planification et la gouvernance urbaines inclusives peuvent contribuer à réduire les tensions, les conflits, les inégalités et la violence dans cinq villes de l'Inde (Ahmedabad, Gurgaon, Patna, Guwahati et Bidar). Il s'intéressera aux moyens que prennent les ...

  20. Globalisation et changement d’échelle dans le gouvernement urbain

    Directory of Open Access Journals (Sweden)

    H.V. Savitch

    2007-10-01

    Full Text Available Cet article analyse les relations entre la mondialisation et le changement d’échelle urbaine. Il considère que les dynamiques à l’œuvre dans le processus de mondialisation (politiques néo-libérales, compétition territoriale, suburbanisation conduisent à de nouvelles contraintes pesant sur les villes. Une des réponses les plus pertinentes que les villes peuvent générer repose sur le changement d’échelle de leurs institutions en bâtissant de nouvelles structures ou en les restructurant pour renforcer leur capacité d’action. Ce processus conduit à reconfigurer les modes de gouvernance et donc le pouvoir urbain sur de nouvelles bases géographiques. Ce type de manipulation territoriale est un instrument qui agit sur l’allocation des ressources entre acteurs, en inclus certains, en exclue d’autres, établit de nouvelles priorités sur l’agenda politique. Cinq types de dynamiques institutionnelles sont présentées et analysées à partir de cas concrets: 1 les villes fusionnées 2 le gouvernement à plusieurs niveaux 3 la coopération partagée 4 les communautés urbaines et 5 les villes non contiguës. Une première évaluation est menée en tentant de mettre jour l’efficacité, le contrôle démocratique et la capacité à générer du développement économique respectifs de ces cinq modèles qui présentent tous des avantages et des inconvénients. Le recours à l’un ou l’autre de ces modèles s’explique essentiellement par les valeurs auxquels il renvoie et par des contingences politiques et économiques. Ils ne garantissent pas non plus un type particulier d’effet même si un changement d’échelle bien maîtrisé peut renforcer la position d’une ville face à la mondialisation.This article explores the relationship between globalization and urban rescaling. It suggests that forces emanating from globalization (neo liberal politics, increased competition, economic restructuring and suburbanization have

  1. Chaire en écosanté sur la pollution urbaine de l'air et les maladies ...

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

    La pollution urbaine de l'air, à l'intérieur comme à l'extérieur des habitations, pose un problème majeur de santé et d'environnement dans le monde et en Afrique en particulier, où elle est associée à des activités économiques, au transport et à l'utilisation de la biomasse pour la cuisine, notamment. Ce problème est ...

  2. Lafargue de Grangeneuve Loïc, Politique du hip-hop. Action publique et cultures urbaines

    Directory of Open Access Journals (Sweden)

    Emmanuel Négrier

    2010-11-01

    Full Text Available L’ouvrage de Loïc Lafargue de Grangeneuve s’inscrit dans une recherche amorcée dans le cadre de sa thèse, qui portait sur les processus d’institutionnalisation des cultures urbaines dans le champ des politiques culturelles. Son travail est centré sur l’interaction entre, d’une part, les représentants de la culture hip-hop (rap, slam, danse hip-hop, graffiti… et d’autre part les institutions publiques : directions régionales des affaires culturelles (DRAC, responsables de la politique de la ...

  3. Le peuplement, catégorie montante des politiques urbaines néolibérales ?

    Directory of Open Access Journals (Sweden)

    Christelle Morel Journel

    2012-05-01

    Full Text Available Cet article se propose de considérer le « peuplement » comme nouvel enjeu stratégique pour les villes, dans un contexte de néolibéralisation des politiques urbaines et de montée en puissance de l’entrepreneurialisme urbain. La volonté de contrôler ou d’agir sur l’occupation sociale des espaces urbains, d’influencer les mobilités résidentielles, n’est pas nouvelle mais les stratégies de gentrification en constitueraient aujourd’hui la principale traduction. Les analyses défendant l’hybridité des politiques urbaines contemporaines, articulant des éléments de restructuration néolibérale et des héritages politiques et institutionnels – nationaux et locaux – de l’ère fordiste, permettent de mieux saisir la complexité des enjeux de peuplement, pris entre les logiques de la « place » et celles du « territoire ». Le cas de Saint-Etienne, ville moyenne dont l’histoire récente est marquée par la désindustrialisation et une décroissance démographique significative (près de 50 000 habitants ont quitté la ville depuis 1968, illustre l’imposition du paradigme de l’attractivité dans les politiques urbaines. En effet, au début des années 2000, la Ville a mis en œuvre une stratégie spécifique sur l’habitat alors que le laisser-faire l’emportait dans la période précédente. Cependant, cette stratégie ne repose pas sur une logique unidimensionnelle de gentrification mais sur une logique hybride mêlant une réelle préoccupation pour les – ou certains des – habitants « déjà là » et des enjeux d’image et d’attractivité à l’égard de l’extérieur, et notamment à une échelle intercommunale.This paper suggests regarding « populating » as a new key issue for cities, in the context of neoliberalisation of urban policies and the rise of urban entrepreneurialism. Within this context, it seems as if gentrification strategies were the main translation of the ancient

  4. Peut-on cartographier des taches urbaines à partir d’images Google Earth ?

    Directory of Open Access Journals (Sweden)

    Johanna Baro

    2014-07-01

    Full Text Available L’étude présentée ici expose les résultats d’un traitement d’images Google Earth dont le but est la cartographie des agglomérations d’Afrique de l’Ouest de plus de 500 000 habitants. Les images accessibles ne disposant pas d’informations spectrales précises (s’agissant de simples images couleur RVB, la méthodologie développée pour l’identification des agglomérations se base sur l’exploitation d’images en teintes de gris pour en extraire les caractéristiques texturales des zones densément bâties. Certaines images couvrant les agglomérations étudiées résultent de la composition en mosaïque d’images satellites acquises dans des conditions différentes. Avant toute exploitation des images, un prétraitement d’égalisation est nécessaire afin d’obtenir une vue uniforme à partir de la mosaïque. Plus précisément, il s’agit d’annuler les différences entre les luminances sur chaque morceau de mosaïque. Nous présentons ici une méthode d’égalisation inspirée de l’algorithme « Midway ». Cet algorithme a originellement été proposé pour uniformiser les luminances sur des paires d’images stéréo. Dans le cas présent, la difficulté consiste à adapter cette technique dans le cas d’images ne présentant pas strictement la même information. Le principe d’égalisation va consister à repérer et à apparier les histogrammes de zones semblables sur les sous-images composant la mosaïque. L’extraction des taches urbaines à partir des images prétraitées est ensuite réalisée par la mise en œuvre de séquences d’opérateurs de la Morphologie Mathématique. Les résultats obtenus ont été validés par une comparaison avec les agglomérations qui ont été cartographiées par photo-interprétation à partir d’images Google Earth et présentées dans la base de données Africapolis.

  5. Des risques « naturels » aux politiques urbaines à Mexico

    Directory of Open Access Journals (Sweden)

    François Mancebo

    2009-07-01

    Full Text Available L’agglomération de Mexico, à plus de 2 000 mètres d’altitude, adossée à la Sierra Madre et la Cordillère Volcanique est assise sur un site accueillant mais redoutable. Il s’agit d’un des endroits les plus exposés du globe, soumis à une combinaison de risques naturels, de risques technologiques souvent mal maîtrisés dus à des industries lourdes, de nuisances, de cumul des polluants et d’un épuisement des ressources locales utilisables, tout particulièrement les ressources en eau. Après le séisme dévastateur de 1985, les acteurs de l’aménagement de Mexico tentent d’intégrer risques et durabilité dans la définition de nouvelles politiques urbaines. Mais, si les risques sont bien identifiés et des réponses sont données, leur applicabilité est quasi-nulle. Une approche normative et n’incluant pas l’ensemble de l’agglomération, mais utilisant les périphéries pour améliorer la durabilité des centres (sorte de durabilité importée à l’échelle de la métropole explique cette situation. Comme dans le mythe de Sisyphe, acteurs locaux et nationaux tentent de faire remonter la pente au rocher du risque mais ce dernier finit toujours par redescendre ? C’est qu’en réalité le problème n’est pas le rocher. Le problème, c’est la pente, c’est-à-dire le substrat fait de représentations territoriales et d’usages de l’espace qui fondent la société mexicaine, sur laquelle roule le rocher.Mexico City is located at an altitude of over 2 000 metres where it occupies an attractive but hazardous site hemmed in by the Sierra Madre and volcanic mountain ranges.The site is one of the most disaster-prone locations in the world, threatened by a combination of natural hazards, poorly controlled technological hazards created by the city’s heavy industry, pollution – particularly air pollution and diminishing local resources, the most seriously threatened being water. Since the devastating earthquake

  6. La digestion anaérobie des boues de stations d'épuration urbaines :état des lieux - état de l'art

    OpenAIRE

    Reverdy, A.L; Baudez, J.C.; Dieudé-Fauvel, E.

    2011-01-01

    / Avec le protocole de Kyoto et le Grenelle de l'environnement, les politiques actuelles prônent le développement des énergies renouvelables. La digestion anaérobie des boues de stations d'épuration urbaines est un procédé permettant de répondre à cette exigence. L'étude présentée dans ce rapport offre dans un premier temps un descriptif du procédé de méthanisation. Dans une deuxième partie, un état des lieux de la digestion anaérobie des boues d'épuration urbaines est réalisé en France...

  7. Espaces à risque et marges : méthodes d’approche des vulnérabilités urbaines à Lima et Quito

    Directory of Open Access Journals (Sweden)

    Alexis Sierra

    2009-05-01

    Full Text Available Pour aborder le risque par l’espace à Quito et à Lima, l’auteur a privilégié une lecture géopolitique qui confronte les différentes représentations sociales du risque notamment de ses causes, entre enjeux et facteurs de vulnérabilités. L’article montre comment les espaces à risques sont assimilés à des marges urbaines porteuses de stigmates. L’analyse de ces stigmates en collaboration avec les géosciences est une entrée pour comprendre la dimension sociale et politique du risque qui apparaît ainsi comme un mode de territorialisation des marges urbaines.

  8. Formes spatiales d’expansion urbaine et le rôle des communautés non musulmanes à l’époque des Réformes.

    Directory of Open Access Journals (Sweden)

    Alexandra Yerolympos

    2012-01-01

    Full Text Available Le présent texte étudie les formes d’expansion urbaine dans les provinces européennes de l’Empire ottoman depuis la moitié du xixe siècle. Dans le cadre des réformes entreprises par l’Empire, l’octroi de droits civiques et politiques à tous les sujets ottomans, le “décollage économique” et la croissance démographique encouragent l’émergence de nouveaux comportements socio-économiques : grâce à la réforme du droit foncier et l’afflux d’investissements dans le secteur immobilier de la part des particuliers, des communautés ou des organismes publics, l’espace urbain est réaménagé et “modernisé”. L’expansion des villes préoccupait les officiers ottomans de bonne heure. La première réglementation moderne d’urbanisme mise en place entre 1848 et 1891 définit les règles selon lesquelles de nouveaux quartiers urbains peuvent être formés. D’après des études sur les villes côtières, ainsi que sur la plupart des villes de l’intérieur des provinces européennes de l’Empire, l’accroissement urbain s’accompagne d’une forte activité de groupes minoritaires pour leur installation résidentielle dans de nouveaux quartiers, très souvent encouragée par les autorités locales. L’installation prend des formes variées, parfois créant des quartiers non pas étanches mais à dominante chrétienne ou juive, parfois parfaitement mixtes. Les variantes rencontrées évoquent les particularités historiques et géographiques de chaque ville ; elles s’expliquent aussi par des stratégies des autorités locales et des besoins ou aspirations des groupes sociaux et ethniques qui les revendiquent. On étudiera l’extension planifiée de trois villes côtières et fortifiées : Volos et Kavala, petites villes dotées d’une importante fonction portuaire où la communauté grecque orthodoxe suscita la création de nouveaux quartiers ; Salonique (Thessalonique qui connut une expansion

  9. Use of hydraulic and aerial mock up to study atmospheric pollution; L'utilisation des maquettes aeriennes et hydrauliques pour l'etude de la pollution atmospherique

    Energy Technology Data Exchange (ETDEWEB)

    Facy, L; Perrin De Brichambaut, C; Doury, A; Le Quinio, R

    1962-07-01

    -Cyr. Les resultats obtenus sont essentiellement de deux natures: - le modele mathematique de diffusion turbulente dans l'atmosphere, deduit de la theorie de Sutton, et que nous utilisons generalement, s'est trouve correctement verifie, qualitativement et quantitativement, dans tous les cas ou les conditions de validite de la theorie etaient remplies par l'experience; - les essais qualitatifs de visualisations photographiques ou cinematographiques ont apporte des precisions interessantes sur des phenomenes pratiquement inaccessibles aux calculs, lies notamment a l'influence des obstacles et des conditions de rejet. D'une maniere generale, on peut affirmer que les etudes de pollution atmospherique peuvent etre menees a bien par des experimentations sur maquettes, et que dans certains cas ces experimentations ne pourront jamais etre remplacees par des modeles mathematiques purs. (auteurs)

  10. Une financiarisation si discrète ? La circulation des standards de la filière d’investissement en immobilier tertiaire dans les politiques de développement urbain du Grand Lyon

    OpenAIRE

    Guironnet, Antoine

    2016-01-01

    Les études urbaines françaises demeurent relativement discrètes sur le processus de financiarisation de la production des espaces urbains. Cette situation est paradoxale au regard de l’arrivée d’acteurs et la diffusion d’outils de la finance de marché dans plusieurs segments urbains (infrastructures, immobilier non résidentiel) dans les années 1990, et du poids de ces secteurs dans l’aménagement. L’objectif de l’article est de démontrer l’intérêt de prendre en compte les acteurs de la filière...

  11. Les pollutions atmosphériques urbaines de proximité à l’heure du Développement Durable

    Directory of Open Access Journals (Sweden)

    Aymeric Blanchet

    2005-06-01

    Full Text Available Les pollutions atmosphériques de proximité liées au tissu urbain dense sont l’objet de nuisances ressenties et dénoncées par les citadins. Historiquement, l’histoire des odeurs délétères en ville est associée aux activités industrielles. Or les politiques municipales, très attentives au moment de l’hygiènisme à l’encadrement des pollutions industrielles, se sont détournées de la question de la pollution atmosphérique urbaine confiée, pour être mesurée et surveillée, à des réseaux de surveillance. La mesure de ces pollutions invisibles et nocives est restée largement cantonnée dans la sphère technique jusqu’à ces dernières années où, progressivement, la pollution atmosphérique est devenue un objet politique. Malgré la récurrence dans le temps du phénomène de pollution urbaine de proximité, et l’importance croissante des plaintes des habitants que cela génère, les réponses institutionnelles n’ont pas encore été complètement formalisées jusqu’à présent pour définir un mode de traitement et des réponses à apporter. Un suivi des plaintes, réalisé à Paris et dans la région Nord-Pas-de-Calais, sur le territoire de l’Artois, le montre bien. La prise en compte et le traitement des nuisances dues aux pollutions urbaines de proximité sont encore difficiles et nécessitent du temps pour être reconnues, comme le montre l’exemple de la commune de Drocourt. En outre, ces nuisances sont encore difficilement évaluables et quantifiables et les réponses qui s’esquissent répondent peu au principe de Développement Durable et s’appuient davantage sur une logique de remédiation, bien plus que de précaution. La question des nuisances environnementales et les plaintes qu’elles génèrent ont un caractère ambigu : entre santé et qualité de vie, entre industrie et urbanité, entre nuisance et toxicité, entre gêne et pollution de proximité. Leur ambiguïté permet d’interroger la

  12. Short term effect of urban air pollution on respiratory disease, especially chronic obstructive pulmonary disease (COPD). Analysis of studies published from 1962 to january 2000; Impact a court terme de la pollution atmospherique urbaine sur l'insuffisance respiratoire par bronchopneumopathie chronique obstructive (BPCO). Synthese des etudes, publiees de 1962 a janvier 2000

    Energy Technology Data Exchange (ETDEWEB)

    Desqueyroux, H.; Momas, I. [Universite Rene Descartes, Faculte des Sciences Pharmaceutiques et Biologiques, Lab. d' Hygiene et de Sante Publique, 75 - Paris (France)

    2001-02-01

    This review presents a synthesis of studies published from 1962 to 2000 on the relations between air pollution and chronic obstructive pulmonary disease (COPD): 12 ecological epidemiological studies, 6 epidemiological panel studies, and 11 controlled human exposure trials. The controlled trials, ecological time-based epidemiological studies and panels are examined successively followed by a discussion of their methodology and results. The controlled trials either do no highlight effects or show effects having no clinical significance since variations are similar to physiological variability. For epidemiological studies reporting individual data, the results point to a particle effect (two studies). This effect of particles is found in ecological studies which also describe an impact of ozone, sometimes of sulfur dioxide and less often of nitrogen dioxide. In conclusion, patients suffering from COPD are generally regarded as a group sensitive to air pollution, as suggested by the results of numerous ecological epidemiological studies. Rare individual studies provide a few arguments supporting this assumption. (authors)

  13. Programme of air surveillance and health 9 towns. Synthesis review. Surveillance of effects on the health in relation with air pollution in urban area. Phase 2; Programme de surveillance Air et Sante 9 villes. Revue de synthese. Surveillance des effets sur la sante lies a la pollution atmospherique en milieu urbain. Phase 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-06-15

    The InVS published its first results on the Nine-City Air and Health Surveillance Programme (PSAS-9) in March 1999. This phase I pointed out that it was possible for various specialists in the field of air pollution and health to gather around a common set of problems. They also found a link between the daily variations of all the urban air pollution indicators and the total, cardio-vascular and respiratory mortality which, based on French data, contributed to strengthen scientific knowledge in this field. Today's report presents the results of phase Il of the PSAS-9 programme which essentially aimed at assessing the short-term exposure-risk relationships between pollution indicators and hospital admission indicators. This second phase also allowed to confirm the results of phase I on the short-term effect of air pollution on mortality thanks to longer periods of study. Exploratory analysis using new indicators and sensitivity analysis on the pertinence of results were also conducted. Finally, methodological tools were developed in order to optimise data collection and statistical modelization. All these results enabled the quantification of the short-term health impact of air pollution on the PSAS-9 cities. PSAS-9 is now an ongoing epidemiological surveillance programme on the effects of urban air pollution on health, providing information tools to decision-makers and the general population. (author)

  14. Evaluation of sanitary impact of the urban air pollution. Agglomeration of Angouleme, Niort and Poitiers impact at short and long term; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Agglomeration d'Angouleme, Niort et Poitiers impact a cour et long terme

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    An health impact assessment of air pollution based on the I.n.V.S. guidelines has been conducted in Angouleme, Niort and Poitiers according to the Regional Plan for the quality of air in the region of Poitou- Charentes. Short-term effects on morbidity (hospital admissions in 2001 and 2002) and mortality were estimated. Long-term effects due to air pollution on mortality were also evaluated. The estimated numbers of hospitalizations for cardiovascular and respiratory admissions due to air pollution are 19 in Angouleme, 11 in Niort and 19 in Poitiers. For long-term mortality the estimated impact is 25 in Angouleme, 19 in Niort and 23 in Poitiers. The different scenarios of air pollution reduction showed that the most effective ones are those which lead to reduce of 25% the mean of the involved pollutant. Results showed that air pollution are even resulting in health effects for some levels of pollution lower than current limits. The most effective actions should therefore associate reduction of the source emissions on a daily basis and decrease of the over-limits levels of pollution. (author)

  15. Evaluation of sanitary impact of urban air pollution. Agglomeration of Orleans and Tours impact at short and long term; Evaluation de l'impact sanitaire de la pollution atmospherique urbaine. Agglomeration d'Orleans et de Tours impact a cour et long terme

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    An health impact assessment of air pollution based on the I.n.V.S. guidelines has been conducted in Orleans and Tours according to the regional Plan for the quality of air in the region of Centre. Short-term effects on morbidity (hospital admissions in 2002 and 2003) and mortality. Long-term mortality was also estimated. The estimated numbers of hospitalizations are: Orleans: 11 [2-23]* for respiratory admissions and 26 [16-36]* for cardiovascular admissions; Tours: 11 [3-22]* for respiratory admissions and 34 [20-48]* for cardiovascular admissions. For long-term mortality the estimated impact is 59 [36-84]* in Orleans and 61 [37-86]* in Tours. The different scenarios of air pollution reduction showed that the most effective ones are those which lead to reduce of 25% the mean of the involved pollutant. Results showed that air pollution are even resulting in health effects for some levels of pollution than current limits. The most effective actions should therefore associate reduction of the source emissions on a daily basis and decrease of the over-limits levels of pollution. (author)

  16. Programme of air surveillance Air and Health 9 towns. Surveillance of effects on health in relation with air pollution in urban area. Phase 2; Programme de surveillance Air et Sante 9 villes. Surveillance des effets sur la sante lies a la pollution atmospherique en milieu urbain. Phase 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-06-15

    The InVS published its first results on the Nine-City Air and Health Surveillance Programme (PSAS-9) in March 1999. This phase I pointed out that it was possible for various specialists in the field of air pollution and health to gather around a common set of problems. They also found a link between the daily variations of all the urban air pollution indicators and the total, cardio-vascular and respiratory mortality which, based on French data, contributed to strengthen scientific knowledge in this field. Today's report presents the results of phase Il of the PSAS-9 programme which essentially aimed at assessing the short-term exposure-risk relationships between pollution indicators and hospital admission indicators. This second phase also allowed to confirm the results of phase I on the short-term effect of air pollution on mortality thanks to longer periods of study. Exploratory analysis using new indicators and sensitivity analysis on the pertinence of results were also conducted. Finally, methodological tools were developed in order to optimise data collection and statistical modelization. All these results enabled the quantification of the short-term health impact of air pollution on the PSAS-9 cities. PSAS-9 is now an ongoing epidemiological surveillance programme on the effects of urban air pollution on health, providing information tools to decision-makers and the general population. (author)

  17. Atmospheric pollution and heating plants in urban area. What technical solutions for the coal and the heavy oil? For which costs?; Pollution atmospherique et chaufferies en milieu urbain. Quelles solutions techniques pour le charbon et le fioul lourd?. A quel couts?

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    In France, furnaces fed with coal and heavy fuel and established in urban area, are bound by many restraints: a reinforcement of the regulations on atmospheric emissions, a strong social demand bound to the urban air quality improvement and a necessary costs mastership. So buildings managers and persons responsible for district heating are confronted with technical and strategical choices. To answer their questions ADEME organized a day of information around four main themes: the urban heating in France, actions on fuels, possible technics for the smokes desulfurization and nitrogen oxides reduction, costs and financing of the solutions. (A.L.B.)

  18. Les temporalités frontalières et urbaines du port de Strasbourg. Analyse géohistorique d’une relation fluviale ville-port

    Directory of Open Access Journals (Sweden)

    Antoine Beyer

    2012-05-01

    Full Text Available L’éclairage géohistorique de la relation ville-port à Strasbourg implique un croisement de deux chronologies, l’une géopolitique, liée à une position frontalière évolutive, l’autre économique et générale, articulée à l’histoire portuaire dans une perspective plus résolument urbaine de la déconnexion-reconnexion des deux espaces fonctionnels. Dans cette logique, l’analyse suivie envisagera alternativement l’évolution de la fonction portuaire de Strasbourg dans une situation d’instabilité frontalière, pour considérer ensuite la manière dont l’espace portuaire participe au projet urbain. Ces deux approches permettront par ailleurs d’envisager l’analyse à deux échelles géographiques, celle de l’espace régional et celle de l’aménagement urbain.The geo-historical approach to the relation port-city in the case of Strasbourg (France implies to consider at the same time two chronologies. On the one hand, the geopolitical dimension with a city leaned on the french-german border. On the other hand, the more common economic development with the connection and the de-connection phases of the two functional spaces involved, i.e. port and urban spaces. In such a perspective, the paper will develop alternatively the way the port grew in a political unstable context, and replace its developement in the shaping of the global urbanization. Those two topics will in return differenciate two geographical scales, the regional environment and the more local urban planning strategies.

  19. Progettazione dello spazio urbano e comportamenti criminosi / Planification de l’espace urbain et comportements criminels / Urban space planning and crime

    Directory of Open Access Journals (Sweden)

    Sicurella Sandra

    2012-04-01

    Full Text Available Crime is a common phenomenon in urban spaces. There is a relationship between crime, urban environment and the perception of security. For this reason, it is important to plan safe public spaces from an architectural point of view because it may help to reduce number of crimes and citizens’ feelings of insecurity. It is thus necessary to study the problem of urban crime from different perspectives: in this sense, architecture, town planning, law, sociology and criminology may help actively to solve the problems connected to crime in our cities.L’espace urbain est l’un des principaux lieux des phénomènes criminels. C’est en effet dans les villes que se développent des phénomènes indicatifs de la genèse, de l’explication des comportements criminels et du contrôle social. Dans la relation entre criminalité, environnement physique et perception de la sécurité, une importance considérable est accordée à la planification des espaces urbains car une organisation soignée du point de vue architectural et urbanistique peut affecter positivement l’atténuation du sentiment de vulnérabilité et contribuer à la réduction de la criminalité. Afin de limiter les possibilités de commission des crimes et de réduire le sentiment d’insécurité ressenti par les citoyens, il est donc nécessaire d’utiliser une approche multidisciplinaire pour aborder les problématiques de nos villes : architectes, urbanistes, juristes, sociologues et criminologues peuvent, tous ensemble, devenir les acteurs de la concertation urbaine pour intervenir efficacement dans nos villes.

  20. L’interaction urbain-rural : une problématique renouvelée Urban-rural interaction revisited

    Directory of Open Access Journals (Sweden)

    Christian Vandermotten

    2010-12-01

    Full Text Available La distinction entre l’urbain et le rural était claire sous l’Ancien Régime, dans des sociétés peu mobiles. La révolution industrielle accentue l’identification entre la ville, l’industrie et la modernité. Après la Seconde Guerre mondiale, le développement du transport routier affranchit l’industrie des localisations urbaines et la périurbanisation progresse. En même temps, l’accroissement des productivités agricoles libère de plus en plus de main-d’œuvre paysanne. Après deux siècles au moins d’exode rural, les campagnes se rurbanisent, mais cette rurbanisation s’inscrit dans un contexte global de mégapolisation. Cette configuration devrait imposer une nouvelle appréciation des rapports entre l’urbain et le rural, en ce compris leurs rapports politiques.The distinction between urban and rural was clear under the Ancien Régime, as societies featured a low level of mobility. The industrial revolution increased the identification between cities, manufacturing and modernity. After the Second World War, growing road traffic freed industries from urban locations and suburbanisation thus increased. Simultaneously, the increase in food productivity required fewer and fewer agricultural workers. After more than two centuries of rural exodus, rurbanisation transformed rural areas, even as this very process of rurbanisation should be seen as part of a global megapolization process. This pattern implies new kinds of relations between the rural and the urban, including from a political point of view.

  1. Città, violenza urbana e sentimento di insicurezza / Villes, violence urbaine et sentiment d’insécurité / Cities, urban violence and insecurity

    Directory of Open Access Journals (Sweden)

    Lourenço Nelson

    2012-10-01

    Full Text Available Cet article met en évidence que la violence urbaine et l’insécurité sont des thèmes centraux pour les sociétés actuelles car ils font partie des préoccupations de la population et de la vie démocratique de manière significative. Pour aborder cette problématique, il est nécessaire d’effectuer une analyse extensive de la mondialisation et des dynamiques urbaines qui caractérisent la fin de l’époque moderne dans ses multiples dimensions, par exemple sociales, culturelles et politiques. Violence urbaine et insécurité demandent une structure institutionnelle nouvelle et la définition de politiques publiques de sécurité nouvelles pour répondre à l’insécurité qui domine dans les sociétés urbaines.L’analyse globale des relations entre l’évolution de la criminalité et le développement du sentiment d’insécurité amène l’auteur à expliquer la manière dont les sociétés contemporaines vivent et abordent la question de la sécurité. This paper argues that urban violence and insecurity are central societal issues which are a significant part of people's concerns and democratic life. Its analysis implies an extensive understanding of globalisation and urban dynamics that characterise late modernity in its multiple dimensions: i.e. the social, cultural, political, and economical dimensions.Urban violence and insecurity call for a new institutional framework and the definition of new public security policies that will respond to the insecurity that prevails in urban society.The comprehensive analysis of the relationship between the evolution of crime and the development of the feeling of insecurity allows us to understand how contemporary society lives and deals with the issue of security.

  2. Nature urbaine et urbanité dans la station touristique de Salou (Espagne, au travers de l’étude : d’un parc-promenade, d’un paseo, d’un parc urbain

    Directory of Open Access Journals (Sweden)

    Jean Rieucau

    2010-11-01

    Full Text Available Les espaces publics naturés deviennent un enjeu de l’attractivité touristique des stations côtières sur le littoral méditerranéen espagnol. Les municipalités conduisent des politiques de récupération urbaine sur les plages, les hauts de plage, le long du linéaire côtier, aux dépens d’une urbanisation anarchique, héritée des années 1960 (hôtels, terrains de camping. Les paysagistes confrontés aux clivages entre la ville touristique et la ville « habitante » utilisent une végétation allogène, décontextualisée (palmiers, pour les espaces publics mis en tourisme et recourent à une nature indigène (oliviers, cyprès pour les espaces communs des résidents permanents.The forested public areas become a stake of the touristic appeal of coastal destinations on the Mediterranean coast of Spain. The municipalities steer the urban recovery policies on the beaches, beach heights, along the coastal line, at the expense of anarchical urbanization, inherited from the years 1960 (hotels, camping ground. The landscapers, confronted with the split between touristic city and “resident” city, use exotic vegetation, out of context (palm tree for public areas developed into tourism, and resort to indigenous nature (olive trees, cypress for common areas for the permanent residents.

  3. Conception d’un automate cellulaire non stationnaire à base de graphe pour modéliser la structure spatiale urbaine: le modèle Remus

    Directory of Open Access Journals (Sweden)

    Arnaud Banos

    2007-10-01

    Full Text Available Nous proposons dans cet article une formalisation originale des automates cellulaires géographiques, à même de mieux prendre en compte grâce à une structure de graphe le voisinage irrégulier et dynamique d’entités spatiales. Le modèle Remus permet ainsi de représenter sous la forme d’un graphe mathématique les entités spatiales du bâti et les réseaux de transport urbain (graphe urbain ; il permet aussi de calculer la distance-temps entre bâtiments par le réseau. Le modèle Remus permet l’extraction de différents graphes, dont le graphe fonctionnel des distances-temps entre les immeubles et le graphe de relations de voisinage qui représente le voisinage par le réseau pour un certain seuil de temps de trajet et pour un mode de transport donné.

  4. Un site urbain façonné par l’industrie : Thiers, ville coutelière

    Directory of Open Access Journals (Sweden)

    Anne Henry

    2012-05-01

    Full Text Available L’évolution urbaine de Thiers est profondément marquée par une intense activité industrielle avérée depuis près de sept siècles. Cet impact est particulièrement perceptible dans les gorges de la Durolle, occupées par près de quarante usines ou ateliers. L’industrie est également très présente dans le centre ancien, où les étendoirs de papeterie et les ateliers de couteliers à domicile sont parfaitement intégrés dans l’habitat médiéval. On constate également que les grandes avancées techniques ayant émaillé l’histoire de l’industrie aux XIXe et XXe siècles ont eu des conséquences indéniables sur l’évolution de la ville et des usines : l’évolution des axes de communication, la mécanisation des procédés de fabrication, l’électrification, ont permis un développement sans précédent de la coutellerie et de la cité tout entière.The evolution of the town of Thiers is strongly marked by the intense industrial activity of the locality, specialised in cutlery production for nearly seven centuries. This impact of industry is particularly visible in the Durolle gorge, where there are nearly forty factories and workshops. The presence of industry is also perceptible in the historic centre of the town, where drying sheds for paper and cutlery workers’ shops are integrated into the medieval habitat. The technical advances which marked the industry during the nineteenth and twentieth centuries also had a notable influence on the evolution of the town and its factories. The development of means of communication, the mechanisation of production processes and electrification all contributed to an unprecedented growth of cutlery production and of the town as a whole.

  5. Gestion de l'environnement urbain et risques 'naturels'. La problématique des Quebradas à Quito (Equateur

    Directory of Open Access Journals (Sweden)

    1996-01-01

    Full Text Available Les nombreuses quebradas, ravins à écoulement sporadique qui traversent le site de Quito, ont été systématiquement remblayées lors de l’urbanisation, pour servir notamment de zones de décharge plus ou moins contrôlée pour les déchets solides. À partir d’une cartographie diachronique, l’historique de ce remblaiement du réseau hydrographique est décrit, et les risques de nature morphoclimatique induits par ces profondes transformations, étudiés par ailleurs, sont brièvement évoqués. Ces zones spécifiques d’un site urbain de montagne relèvent d’un statut juridique de protection propre au réseau hydrographique en ville, lequel est profondément modifié dans la pratique après remblaiement, voire simplement oublié. Tout se passe comme si le remblaiement et l’urbanisation du réseau hydrographique faisaient l’objet d’un large consensus social, pour gagner de l’espace, donner une solution intra-urbaine à l’évacuation des déchets, et éradiquer des zones socialement incontrôlées. Les représentations sociales qui induisent une politique non explicite de gestion du site, sont analysées et discutées, au moment où les gestionnaires de la ville s’interrogent quant au bien-fondé de la poursuite du processus, alors que ce dernier se poursuit activement pour cacher la forte pollution du rio Machangara, principal émissaire du bassin. MANEJO DEL MEDIO AMBIENTE Y RIESGOS “NATURALES”. LA PROBLEMÁTICA DE LAS QUEBRADAS EN QUITO (ECUADOR. Las numerosas quebradas que atraviesan la ciudad de Quito fueron constantemente rellenadas durante el proceso de urbanización, sirviendo de basurero controlado o no. Se describe la historia del relleno de la red hidrográfica mediante su cartografía en el tiempo, y los riesgos de tipo morfoclimático producidos por esas transformaciones, que fueron investigados anteriormente, son resumidos. Las zonas de quebradas, específicas de un sitio urbano montañoso, tienen un estatuto jur

  6. Indice d'égouttage et siccité infinie : deux outils d'optimisation de la concentration des boues résiduaires urbaines

    OpenAIRE

    Olivier , Jérémy; Ginisty , Pascal; Vaxelaire , Jean

    2017-01-01

    International audience; Les boues urbaines, déchets issus du traitement des eaux usées, sont généralement déshydratées mécaniquement. Afin de les déshydrater une étape de floculation est quasi-systématiquement nécessaire. Or l'optimisation de cette floculation reste très empirique. Dans ce travail, nous utilisons un nouvel indice, l'indice d'égouttage, qui permet de quantifier la qualité d'une floculation pour le procédé d'égouttage, pour déterminer les paramètres optimaux (choix du polymère,...

  7. Modèles de réutilisation des amphithéâtres antiques dans la formation des tissus urbains

    Directory of Open Access Journals (Sweden)

    Bastien Lefebvre

    2011-04-01

    Full Text Available Après l’abandon des jeux à la fin de l’Antiquité, les amphithéâtres ont été réutilisés de manière variée dans les villes médiévales et modernes. La modélisation graphique de plusieurs scénarios de réutilisation en Angleterre, en France et en Italie, aboutit à l’identification de trois dynamiques élémentaires qui permettent de mieux comprendre l’héritage de ces édifices dans la formation du tissu urbain.

  8. Le marketing urbain comme dispositif de légitimation : actions d’élites et espaces de citoyenneté en milieu périurbain wallon

    Directory of Open Access Journals (Sweden)

    Vanneste, Damien

    2007-11-01

    Full Text Available À une époque où s’entrecroisent l’idée forte de changement permanent et la valorisation d’espaces démocratiques, il semble opportun de repenser la participation à la production de l’espace local et les modes d’action des élites. A partir d’une étude de cas qui retrace les cheminements de différents projets locaux en Belgique, un système d’action politique cohérent qui mêle visibilisation de l’action, activisme et production d’un consensus est dégagé. Ce dispositif de légitimation peut alors être étudié en termes de marketing urbain et permettre de confronter les contours organisationnels actuels de la politique à l’horizon démocratique.

  9. Mesure de la masse volumique des particules des eaux résiduaires urbaines : protocole et évaluation des incertitudes

    OpenAIRE

    RUBAN, Gwenaël; LABORATOIRE CENTRAL DES PONTS ET CHAUSSEES - LCPC

    2004-01-01

    La connaissance de la masse volumique des particules des eaux résiduaires urbaines est intéressante notamment pour l'étude de leur traitement par décantation ainsi que des relations entre concentrations en matières en suspension et paramètres optiques (turbidimétrie).Une étude des différentes méthodes de mesure de la masse volumique appliquées aux eaux résiduaires a été effectuée par G. Chebbo (1992). Il en a conclu que le pycnomètre à gaz type Beckman est le seul appareil donnant satisfactio...

  10. Modes d’habiter urbains et ruraux : entre continuité et rupture Urban and rural lifestyles: Between continuity and break

    Directory of Open Access Journals (Sweden)

    Samuel Carpentier

    2010-01-01

    Full Text Available Le passage de la ville à l’urbain a marqué l’avènement d’une société postmoderne dans laquelle la polarisation de plus en plus forte des agglomérations sur l’espace local devait conduire à un nivellement des modes de vie. Le processus de périurbanisation, en cours depuis plusieurs décennies, illustre cette diffusion physique et sociale de l’urbain vers des espaces toujours plus éloignés et dépendants de la ville-centre. La problématique de cet article consiste alors à voir s’il existe, de la ville aux zones rurales, des gradients d’urbanité en fonction des caractéristiques morphologiques (notamment les densités et fonctionnelles (illustrées par la mobilité de ces espaces. Pour ce faire, une typologie de communes a été élaborée pour caractériser des types d’ancrages résidentiels. Ensuite, une enquête a permis de collecter les pratiques et les représentations de l’habitat et de la mobilité au Luxembourg (N=600 en 2005, en fonction de la zone de résidence des individus. Dès lors, les rapports urbain/rural sont analysés au regard des modes d’habiter, c’est-à-dire de la spatialisation des modes de vie en fonction du couple ancrage/mobilité. Les résultats obtenus mettent en lumière à la fois des gradients comportementaux (tant en termes de pratiques que de représentations, témoignant d’une certaine continuité urbain/rural, et des ruptures qui soulignent certaines spécificités des espaces ruraux.The metropolization process marked the advent of a postmodern society in which the growing polarization of agglomerations on local space would lead to a levelling of lifestyles. The decades-old process of suburbanization illustrates the physical and social diffusion of urban features towards more and more distant spaces, which thus become dependent on the city-center. This paper therefore aims at exploring whether urban gradients can be identified when moving from the city to rural areas. Such

  11. Les nouvelles formes de la communication autour des projets urbains : modalités, impacts, enjeux pour un débat participatif

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    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.

  12. Patrimoine et tourisme urbain. La valorisation de l’authenticité à Lyon et Pékin Heritage and urban tourism. Valorizing authenticity in Lyon and Beijing

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    Yves Bonard

    2008-10-01

    Full Text Available Le tourisme est au cœur des processus de valorisation des territoires urbains. Le patrimoine – pilier majeur de la touristification – tend à prendre un caractère marchand, en tant que produit à valoriser économiquement dans un contexte de villes en compétition. À partir de l’analyse de deux centres urbains en mutations – Lyon et Pékin –, cette recherche montre d’une part l’usage marchand du patrimoine, produit et mobilisé par les pouvoirs publics. D’autre part, ce papier questionne la notion d’authenticité – centrale dans les discours sur la mise en valeur du patrimoine. Apparaissant comme inopérante du point de vue heuristique, nous faisons l’hypothèse qu’elle détient une dimension proprement « fétiche », concourant à la perception déformée de la réalité des rapports sociaux en jeu dans la production patrimoniale.Tourism lies at the heart of urban territorial valorization. The urban heritage – itself a major pillar of urban tourism – is becoming increasingly commodified, within a context of generalized urban competition. Based on the analysis of two changing urban centers – Lyon and Beijing – this paper analyzes the commodified valorization of heritage, produced by entrepreneurial urban governments, and challenges the notion of « authenticity », itself central to discourses on the valorization of urban heritage. This concept of authenticity bears very little heuristic value, and is itself a « fetish », resulting from a deformed perception of reality under the social conditions of capitalism.

  13. Study of atmospheric tritium transfers in lettuce: kinetic study, equilibrium and organic incorporation during a continuous atmospheric exposure; Etude des transferts du tritium atmospherique chez la laitue: Etude cinetique, etat d'equilibre et integration du tritum sous forme organique lors d'une exposition atmospherique continue

    Energy Technology Data Exchange (ETDEWEB)

    Boyer, C.

    2009-11-30

    This thesis has explored the mechanisms of tritium 'absorption and incorporation in a human-consumed plant, lettuce (Lactuca sativa L.), due to atmospheric exposure. Foliar uptake appears to play a key role in absorption of tritium as tissue free water tritium. Whatever the development stage and the light conditions, the specific activity in tissue free water reaches that of water vapour in air in several hours. The specific activity ratio is then about 0, 4. The time to reach equilibrium in soil is over 24 hours in most cases: the specific activity ratio ranges then 0, 01 to 0, 26. Incorporation rate of tissue free water tritium as organically-bound tritium has been estimated to 0, 13 to 0, 16 % h-l in average over the growing period of the plant, but marked variations are observed during growth. In particular, a significant increase appeared at the exponential growth stage. Deposition and diffusion of tritium in soil lead to significant OBT activities in soil. Results globally indicate equilibrium between the different environmental compartments (air, soil, plant). However, some experiments have revealed high OBT concentrations regarding atmospheric level exposure and ask for a possible phenomenon of local tritium accumulation in OBT for particular conditions of exposure. (author) [French] Ce travail de these a concerne l'etude des phenomenes d'absorption et d'incorporation sous forme organique du tritium dans un vegetal de consommation courante, la laitue (Lactuca sativa L.), en reponse a une exposition atmospherique. Il apparait que la voie foliaire joue un role primordial dans l'absorption du tritium au sein de l'eau tissulaire des plants. Quels que soient le stade de developpement des plants et les conditions d'eclairement, le temps necessaire pour atteindre l'equilibre des concentrations dans l'eau libre et dans la vapeur d'eau de l'air est de plusieurs heures; le rapport des concentrations est alors de

  14. Les risques en milieu urbain : éléments de réflexion

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    Robert D'Ercole

    2011-12-01

    Full Text Available L’objectif de ce texte est de contribuer au débat sur la question des risques en milieu urbain, en reprenant les différentes manières d’aborder cette question, et en soulignant les problèmes conceptuels posés par l’approche des risques par les sciences sociales, notamment en géographie. Le texte tente de présenter les multiples points de vue et dimensions du risque, discute les différentes notions qui entrent dans sa définition, et argumente sur la nécessité de prendre en compte « ce qu’on risque de perdre » dans la définition du risque, ce qui renvoie d’une part à la construction sociale du risque, d’autre part à l’arbitrage entre risques opéré par les politiques publiques. Il insiste sur la nécessité pour les sciences sociales et la géographie de construire un concept dégagé de la primauté de l’aléa.This text is a contribution to the debate on the question of the risks in urban zones. It exposes the various approaches of this question, and focuses on the conceptual problems put by the definition of the risks by the social sciences, in particular by the geography. The text exposes the multiple points of view and dimensions of the risk. It discusses the different notions which enter in its definition, and argues about the necessity of taking into account " what we can lose " in the definition of the risk. That position sends back on one hand to the social construction of the risk, on the other hand to the choice between the risks operated by the public policies. The text insists on the necessity for the social sciences and the geography to build a concept cleared of the superiority of the hazard.El objetivo del texto es contribuir al debate sobre la cuestión de los riesgos en medio urbano, exponiendo las diferentes maneras de encarar esta cuestión y señalando los problemas conceptuales planteados por el enfoque de los riesgos en las ciencias sociales, en particular en la geografía. El texto

  15. Notre urbaine condition.

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    Jacques Lévy

    2006-03-01

    Full Text Available La lecture de ce livre, qui est le second qu’Olivier Mongin consacre à la ville après Vers la troisième ville (1995, est fort impressionnante par la culture de l’auteur. Il ne s’agit pas seulement d’un état de la question, au demeurant fort honorable en lui-même, mais aussi et surtout d’un travail personnel orienté vers la réflexion et l’action. Ce parcours transdisciplinaire se situe dans la « maison commune des sciences sociales », ce qui est encore loin d’être ...

  16. Industrialisation et concentration urbaine

    OpenAIRE

    Kamal , Abdelhak

    2010-01-01

    The aim of this thesis is to analyze the determinants of the urban concentration and their effect at different levels of development. The empirical analysis focuses on the developing countries over the period 1950-2000 grouped by level of per capita income. The results confirm the existence of specific trajectories of urbanization rate and urban primacy which differs meaningfully according to the stage of development considered. Certain factors encourage urbanization and its concentration in ...

  17. Study of the behaviour of artificial radioactive aerosols. Applications to some problems of atmospheric circulation (1963); Etude du comportement dcs aerosols radioactifs artificiels. Applications a quelques problemes de circulation atmospherique (1963)

    Energy Technology Data Exchange (ETDEWEB)

    Lambert, G. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1963-11-15

    The aim of this work, consists in the examination of the behaviour of radioactive aerosols produced in the atmosphere by nuclear explosions, in order to deduce the most general laws governing atmospheric circulation and diffusion. After having given a general table of the radioactive aerosols present the authors consider the validity and the precision of the measurement methods and the concentration of the aerosols at ground level and in the upper atmosphere, as well as their deposition on the ground. The existence is thus demonstrated of a tropospheric equatorial barrier and of discontinuous and seasonal aspects of stratosphere-troposphere transfers. The role is shown of precipitations and dry auto-filtration in the lower atmosphere cleaning processes. This work makes it possible to describe the general behaviour of dust from the stratosphere, and to improve the total radioactive contamination of the globe. (author) [French] L'objectif de ce travail consiste a examiner le comportement des aerosols radioactifs introduits dans l'atmosphere par les explosions nucleaires, pour en deduire les lois les plus generals de la circulation et diffusion atmospheriques. Apres avoir dresse un tableau d'ensemble des aerosols radioactifs presents, on examine la validite et la precision des methodes de mesure de leur concentration, au niveau du sol et en haute atmosphere, ainsi que de leur depot a la surface du sol. On met ainsi en evidence l'existence d'une barriere equatoriale tropospherique; l'aspect discontinu et saisonnier des transferts stratosphere-troposphere; le role des precipitations et de l'auto-filtration seche, dans les processus de nettoyage de la basse atmosphere. Ces etudes permettent de decrire le comportement general des poussieres d'origine stratospherique et d'ameliorer le bilan de la contamination radioactive du globe. (auteur)

  18. Study of the behaviour of artificial radioactive aerosols. Applications to some problems of atmospheric circulation (1963); Etude du comportement dcs aerosols radioactifs artificiels. Applications a quelques problemes de circulation atmospherique (1963)

    Energy Technology Data Exchange (ETDEWEB)

    Lambert, G [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1963-11-15

    The aim of this work, consists in the examination of the behaviour of radioactive aerosols produced in the atmosphere by nuclear explosions, in order to deduce the most general laws governing atmospheric circulation and diffusion. After having given a general table of the radioactive aerosols present the authors consider the validity and the precision of the measurement methods and the concentration of the aerosols at ground level and in the upper atmosphere, as well as their deposition on the ground. The existence is thus demonstrated of a tropospheric equatorial barrier and of discontinuous and seasonal aspects of stratosphere-troposphere transfers. The role is shown of precipitations and dry auto-filtration in the lower atmosphere cleaning processes. This work makes it possible to describe the general behaviour of dust from the stratosphere, and to improve the total radioactive contamination of the globe. (author) [French] L'objectif de ce travail consiste a examiner le comportement des aerosols radioactifs introduits dans l'atmosphere par les explosions nucleaires, pour en deduire les lois les plus generals de la circulation et diffusion atmospheriques. Apres avoir dresse un tableau d'ensemble des aerosols radioactifs presents, on examine la validite et la precision des methodes de mesure de leur concentration, au niveau du sol et en haute atmosphere, ainsi que de leur depot a la surface du sol. On met ainsi en evidence l'existence d'une barriere equatoriale tropospherique; l'aspect discontinu et saisonnier des transferts stratosphere-troposphere; le role des precipitations et de l'auto-filtration seche, dans les processus de nettoyage de la basse atmosphere. Ces etudes permettent de decrire le comportement general des poussieres d'origine stratospherique et d'ameliorer le bilan de la contamination radioactive du globe. (auteur)

  19. La consommation urbaine de l’huile de palme rouge en Côte d’Ivoire : quels marchés ?

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    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

  20. Mutations institutionnelles et recompositions des territoires urbains en Afrique : une analyse à travers la problématique de l’accès à l’eau

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    Catherine Baron

    2006-09-01

    Full Text Available L’accès à l’eau est une priorité des politiques urbaines conduites dans les pays en développement. Ces politiques ont oscillé entre la volonté de généraliser l’accès aux réseaux afin de contrôler l’espace urbain et une segmentation de l’offre afin de cibler différemment les diverses catégories de la population. Quel est alors l’impact, au niveau spatial, des choix opérés dans ce domaine dans les métropoles d’Afrique Sub-saharienne francophone ? Nous articulerons des approches ciblées sur la compréhension des stratégies d’acteurs aux logiques parfois opposées, avec des analyses spatiales permettant de décoder la complexité de la structuration des espaces urbains. Nous repérerons trois phases caractérisées par une articulation originale entre les modes de gouvernance de l’eau retenus et la structuration des espaces urbains. Dans un premier temps, on constate une dualisation de l’espace urbain renforcée par un accès segmenté aux services. Puis, dans un deuxième temps, nous montrerons comment les préconisations faites dans le cadre de la Décennie Internationale de l’Eau Potable et de l’Assainissement des années 1980 correspondaient à une volonté d’homogénéisation de l’espace urbain. Enfin, dans un troisième temps, nous évaluerons l’impact de modèles tels que le partenariat public-privé dans les processus de fragmentation urbaine qui caractérisent ces mégalopoles d’Afrique Sub-saharienne francophone à la période contemporaine.Access to water is one of the major challenges of urban policies implemented in developing countries. These policies aimed either to provide a global access in order to control urban spaces or to segment water supply to offer different services and features to comply with the diversity of actors. What is therefore the impact, in terms of spatial dimension, of different strategies followed by French speaking Sub-Saharan African cities ? In this paper, we

  1. L'évolution du système urbain et la formation de l'espace en Equateur

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    1976-01-01

    Full Text Available Dans les réglons qui constituent,aujourd'hui, la République de l'Equateur, le processus d'urbanisation est apparu sur la côte pacifique, avec les premières formes d'organisation politique régionale,dès le premier millénaire après J-C. Au XlVème siècle, la conquête des hautes terres par les armées incaiques se heurta à une résistance importante des populations locales, ce qui conduisit I'administration impériale à doter le couloir interandin d'un réseau de centres d'une densité relative remarquable et présentant l'ébauche d'une hiérarchie. Au XVème siècle, les conquérants espagnols, après l'éphémère floraison des fondations urbaines, liées à l'exploitation de l'or, sur le versant oriental des Andes, s'organisèrent solidement dans les bassins infra-montagnards. La présence d'une abondante main d'œuvre indigène et le rôle assigné à l'Audience de Quito de fournir le pôle minier du Potosi en produits agricoles et textiles, attirèrent de nombreux Espagnols. Reprenant et amplifiant le réseau hérité de la période incaïque, la colonisation espagnole mit en place un système de centres administratifs, dont la hiérarchie n'a pas connu de grands bouleversements du XVIème siècle à nos jours. Mais quel que fut leur rang dans la hiérarchie administrative, les villes andines, assises de la minorité conquérante, exploitant la population rurale indigène, fonctionnèrent fondamentalement comme lieux de convergence de tous les canaux d'accumulation du capital. Sur la côte se développa un réseau beaucoup plus sommaire, moins destiné à contrôler des régions, provisoirement négligées parce que faiblement peuplées, qu'à assurer la connexion indispensable entre l'espace productif des hautes terres et le reste de l'empire. En las regiones que constituyen, hoy, la República del Ecuador, el proceso de urbanización apareció en la costa del Pacífico, con las primeras formas de organización política regional

  2. L’économie des signes judiciaires dans l’espace urbain madrilène du XVIIe siècle

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    Olivier Caporossi

    2007-05-01

    Full Text Available L’exercice de la police madrilène laisse apparaître une concurrence des codes et des représentations symboliques de la justice. Celle-ci se manifeste dans une discipline des apparences voulue par le roi, le conseil de Castille et les alcades de cour et dans la publicité des corps. Mais les différentes modalités de distribution des signes judiciaires sont analysées autant du point de vue des résultats obtenus dans la territorialisation judiciaire du tissu urbain, que de celui des résistances de certaines institutions de la société (l’aristocratie, les ambassades, les corps privilégiés, le peuple madrilène.The way the Madrid police worked reveals competing codes and symbols in justice. It appeared in the strict appearances imposed by the King, the Council of Castile and the court Alcades, as well as in the image they all had. But the different organisations of these judicial signs are analysed from two points of view: the results obtained in the judicial territory of the urban infrastructure and the oppositions from certain institutions in the society itself, such as the aristocracy, the embassies, the elites and the people of Madrid.

  3. Bunker culturel : la régénération du patrimoine militaire urbain à Saint-Nazaire

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    Renzo Lecardane

    2011-06-01

    Full Text Available Au cours des deux dernières décennies Saint-Nazaire a relancé son développement sans se référer nécessairement aux modèles des métropoles européennes. Concentrées autour de la zone portuaire, près de la base sous-marine allemande, les nouvelles opérations urbaines ont contribué à définir un important projet touristique et culturel. La spécificité symbolique et la valorisation du patrimoine militaire ont permis à Saint-Nazaire de montrer que l’identité d’une ville pouvait activer sa croissance.Over the last two decades, the port city of Saint-Nazaire has encouraged urban redevelopment without necessarily following the models suggested by other European cities. An important cultural and tourist centre has been developed around the port zone, close to the German submarine base dating from the Second World War. The symbolic specificity and the interpretation of this military heritage have shown, at Saint-Nazaire, how a town's special identity can foster growth.

  4. Sociabilité, solidarité : culture, identité et vie urbaine dans les quartiers noirs du cap (Afrique du Sud

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    Myriam Houssay-Holzschuch

    1999-05-01

    Full Text Available La présence des Noirs dans les villes sud-africaines a longtemps été sévèrement limitée et contrôlée par les régimes de ségrégation et d´apartheid. Les espaces qui leur étaient assignés avaient été conçus dans ce but. Pourtant, ils abritent aujourd´hui des formes sociales nouvelles comme une culture urbaine originale et dynamique. Cet article montre comment les structures familiales, l´agencement intérieur des habitations ou le réseau associatif ont transformé ces espaces. Enfin, l´analyse de cartes mentales dessinées par les résidents confirme que l´espace des quartiers noirs existe avant tout comme projection des relations et des réseaux sociaux.

  5. L’incertitude dans l’utilisation des médias géolocalisés : étude de deux applications reliées à la mobilité urbaine

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    Julia Salles

    2015-12-01

    Full Text Available À partir de la différentiation entre les pratiques stratégiques et tactiques, développée par Michel de Certeau (1990, et du concept de l’espace hybride (De Souza et Silva, 2006 ; Nova, 2009, ce travail distinguera les différents rapports à l’incertitude lors du déplacement en milieu urbain par les utilisateurs des médias géolocalisés, notamment par l’étude de deux applications pour appareils mobiles, Foursquare/Swarm et Walking the Edit.

  6. Quand tout ne tient qu’à un pont ! Réfection d’ouvrage et dysfonctionnements urbains à Douala Rehabilitation of a bridge and urban dysfunctioning in Douala

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    Didier Plat

    2012-12-01

    Full Text Available Les travaux de réhabilitation du pont sur le fleuve Wouri, à Douala, ont nécessité la restriction de la circulation d’une partie des transports collectifs urbains. Pour compenser la diminution de l’offre de transport, un service payant de navette pour la seule traversée du pont a été institué. Les mesures de circulation adoptées sans prévision des effets potentiels ont mis à jour des incohérences dans le fonctionnement institutionnel et ont rajouté des contraintes fortes aux usagers des transports collectifs. Un événement exceptionnel met ainsi en lumière le caractère névralgique des grands équipements de transport dans le fonctionnement des systèmes urbains africains.Rehabilitation work of the bridge on the Wouri river, in Douala, required the restriction of vehicle traffic, particularly taxis and motorbike taxis. To compensate for the reduction in public transport provision, a paying bus service for the crossing of the bridge was set up. The traffic restriction, imposed without forecasting side effects, revealed inconsistencies in institutional functioning and added on strong constraints to public transport users. Such an exceptional event shows evidence of the key role of large transport facilities in the functioning of African urban systems.

  7. Mesurer la ville par l’évaluation et la caractérisation du sol urbain : l’exemple de Tours To measure the city by the evaluation and characterization of urban land: the example of Tours

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    Amélie Laurent

    2011-01-01

    Full Text Available Deux thèses récentes d’archéologie ont été engagées sur la compréhension du sol urbain de Tours et menées dans le cadre des recherches archéologiques développées depuis une quarantaine d’années. Elles ont porté plus particulièrement sur l’analyse des caractéristiques et des principes d’exhaussement du sol urbain, correspondant à l’ensemble du dépôt archéologique de la ville.Ces travaux ont concerné deux échelles complémentaires traditionnellement employées en archéologie urbaine : l’évaluation, à l’échelle de la ville, et la caractérisation, à l’échelle du site. Fondées sur l’utilisation d’outils issus des Sciences de la Terre et appliqués dans une problématique d’histoire de la ville, deux nouvelles approches de la stratification des villes pré-industrielles ont été développées, la première concernant la microarchéologie, la seconde, la géotechnique appliquée au dépôt archéologique.Menées conjointement, les deux études présentent un double intérêt : le premier, d’ordre général, concerne la mise en œuvre d’une méthodologie applicable à tout phénomène urbain, en particulier par la création d’un référentiel commun des strates archéologiques, permettant de caractériser des dépôts indéterminés ; le second intérêt, plus ponctuel, concerne l’application de ces principes généraux à un cas particulier de formation du sol urbain, celui de Tours. La modélisation des résultats à l’échelle de la ville implique que l’acquisition des données sur le terrain intègre une problématique historique et topographique.Two recent archaeological theses have been involved with the understanding of the urban archaeology of Tours and conducted as part of the archaeological research developed over a 40-year period. They particularly cover the analysis of the characteristics and principles of the raising of urban land, corresponding to the entire archaeological

  8. Fermeture résidentielle et politiques urbaines, le cas marseillais Diffusion of closed residentials and urban policy, the case of Marseille (France

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    Elisabeth Dorier

    2012-06-01

    Full Text Available La fermeture résidentielle à Marseille se caractérise par son intensité (presque 20 % du total des logements de la commune et son emprise spatiale très forte dans certains quartiers (plus de 40 % de leur surface urbanisée. Issu d’une recherche de 3 ans et d’un rapport de recherche remis au PUCA en 2010 (« La diffusion des ensembles résidentiels fermés à Marseille. Les urbanités d’une ville fragmentée », l’article propose d’enrichir la lecture des processus complexes du cloisonnement résidentiel en s’attachant, d’une part, aux effets de contextes géohistoriques, particulièrement aux héritages fonciers (temps long de la production des espaces urbains et, d’autre part, aux synergies actuelles entre une action municipale orientée vers l’attractivité territoriale et une offre immobilière spéculative. La multiplication des partenariats publics-privés semble ici dissoudre le fameux dualisme identifié par Mangin (2004 entre « urbanisme de produit » et « urbanisme de projet ».Residential closing in Marseille is characterized by its intensity (almost 20% of total housing in the municipality and its very strong spatial extent in some areas (more than 40% of the urbanized area. After a research of three years and a report submitted to the PUCA in 2010 (“The distribution of residential closed in Marseille. The urbanities of a fragmented city», this article proposes to enrich the reading of the complex processes of residential segregation by focusing on the one hand the effects of geo-historical contexts, particularly in land inheritance (long time production of urban spaces and in the other hand the synergies existing between a municipal action-oriented territorial attractiveness and speculative real estate offer.

  9. L’habitat spontané comme un outil de développement urbain. Le cas de Bangkok Spontaneous Housing as a Tool for Urban Development, the Case of Bangkok

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    Fanny Gerbeaud

    2011-10-01

    Full Text Available En Thaïlande, les ensembles d’habitat spontané s’étendent à toute la capitale, malgré des politiques publiques qui visent à les contrer. Ce sont aujourd’hui de véritables morceaux de ville qui dynamisent l’espace urbain, car étroitement liés à l’identité et à l’histoire de la ville. L’opposition entre habitat spontané et « logement formel », fréquente tant dans les productions scientifiques que dans les représentations, mérite donc d���être interrogée à Bangkok. À partir d’une analyse spatiale et architecturale, nous avons abordé l’habitat spontané comme une manière de fabriquer la ville centrée sur l’appropriation : au moins sous trois formes (habitat spontané pur, ancien, greffé, il assure par sa flexibilité la continuité du tissu urbain et s’y assimile progressivement. Si pour les autorités locales les communautés de bidonvilles demeurent un signe de sous-développement, certains architectes et acteurs y voient une source d’inspiration ainsi qu’un patrimoine populaire à préserver. Une métropolisation accrue et la mondialisation des échanges économiques, culturels, politiques, amènent de nouvelles modalités de négociation de l’espace urbain qui redéfinissent le statut de l’habitat spontané. Avec l’apparition de nouvelles professions (architecte des communautés et orientations dans la manière de concevoir des projets urbains (processus participatif notamment, l’habitat spontané s’affirme peu à peu comme un outil de développement de la capitale.In Thailand, despite some public policies, spontaneous settlements spread all over the city. Closely related to the city’s history and identity they are nowadays real dynamic neighbourhoods. The opposition between spontaneous housing and “formal housing”, common in both the scientific publications and representations, is yet to be questioned in Bangkok. Through an architectural and spatial analysis, we

  10. Pourquoi les étudiants de régions rurales montrent des aspirations scolaires plus faibles que ceux provenant de régions urbaines? Une explication basée sur une perspective motivationnelle et relationnelle

    OpenAIRE

    Litalien, David

    2008-01-01

    Tableau d’honneur de la Faculté des études supérieures et postdoctorales, 2007-2008. Plusieurs études démontrent que les étudiants des régions éloignées ont moins d’aspirations scolaires que ceux des villes (Arnold et al., 2005). Nous tentons de compléter l’étude des déterminants des aspirations à l’aide de la théorie de l’autodétermination (Deci & Ryan, 1985). Notre modèle motivationnel propose que comparativement aux étudiants urbains, ceux des régions vivent plus de problèmes sur le...

  11. Hamman Philippe, Blanc Christine, 2009, Sociologie du développement urbain durable. Projets et stratégies métropolitaines françaises, Bruxelles, P.I.E Peter Lang, 260p.

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    Bruno Villalba

    2009-10-01

    Full Text Available Cet ouvrage, réalisé en collaboration avec Flore Henninger, préfacé par Viviane Claude et postfacé par Corinne Larrue, est dirigé par Philippe Hamman (maître de conférences en sociologie au département d’urbanisme de l’UFR de sciences sociales, pratiques sociales et développement de l’université de Strasbourg ; il a dirigé, en 2008, Penser le développement durable urbain : regards croisés, Paris, L’Harmattan et Christine Blanc (sociologue et urbaniste, chargée d’études au Centre de recherche...

  12. Risk analysis related to dangerous materials transport and storage in urban areas; L'integration du risque lie au transport et au stockage des produits chimiques dans la planification urbaine: l'apport des outils d'analyse decisionnelle

    Energy Technology Data Exchange (ETDEWEB)

    Lombard, J; Hubert, P; Pages, P

    1989-12-01

    Risk management in an urban areas not always an easy task and the selection of appropriate prevention measure is often difficult. Consequences of an accident can be multiple (mortality, destruction, pollution, interruption of supplies, economic losses, traffic difficulties), and preventive measures are difficult to compare. The objective of this report is to present different methods applicable for decision making emphasising the criteria for their intercomparison and their limitations. In any case a more sophisticated analysis is needed for risk management in urban areas. Principals of methods needed for decision making are presented. These methods are based on a single criteria (regular constraint), on a few criteria that can be measured (cost-benefit), or a number of criteria at choice. These rather general methods should be adaptable to be applied for specific domain. For risk management the following adaptation are presented: identifying the limit of maximum individual risk (generalisation of regular constraint); adoption of different values of human life as a function of nature of consequences (generalisation of cost-benefit method), application of risk avoidance factors. These different developments predict versions of tools for decision making which can be applicable to risk management in urban areas. [French] La gestion des risques en milieu urbain n'est pas toujours une tache aisee et la selection du moyen de prevention approprie sera souvent difficile. En effet, les consequences d'un accident peuvent etre multiples (mortalite, morbidite, destruction, pollution, interruption de reseaux, pertes economiques, difficultes de circulation...) et les moyens de prevention envisageables pour limiter l'occurrence d'un accident et/ou les consequences associees seront alors difficiles a comparer. Le recours a une methode d'evaluation permettant de quantifier puis de comparer les merites respectifs de ces differents moyens devient aujourd'hui necessaire afin de

  13. Les nouveaux systèmes de propulsion envisageable pour les véhicules urbains Potential New Proplusion Systems for Urban Vehicles

    Directory of Open Access Journals (Sweden)

    Salé B.

    2006-11-01

    Full Text Available On demande de plus en plus aux véhicules particuliers utilisés en zone urbaine de répondre à un certain nombre de contraintes relatives à la pollution, au bruit et aux économies d'énergie. Il convient donc d'examiner les différents modes de propulsion qui peuvent être retenus en les classant en deux grandes catégories les systèmes thermomécaniques et les systèmes électrochimiques. Les systèmes thermomécaniques, et parmi eux les moteurs à explosion, présentent l'avantage de disposer à la fois d'une puissance massique élevée et d'une énergie massique importante grâce aux possibilités de stockage qu'offrent les hydrocarbures légers. Dans ces conditions il apparaissait tentant, au moins en première étape, d'adapter les moteurs à explosion classiques aux exigences nouvelles en matière d'environnement et d'économie et ceci d'autant plus que ce type de moteur couvre à l'heure actuelle et pour plusieurs années encore la quasi-totalité du parc automobile. Un effort de recherche important a déjà permis de réduire dans une forte proportion les émissions de polluants par l'adaptation de nouveaux modes de combustion ou par l'utilisation de pots catalytiques. Cet effort s'étend d'ailleurs à l'étude d'autres convertisseurs thermomécaniques, tels que le moteur Stirling, qui conjugue les avantages d'un rendement plus élevé à celui d'une pollution réduite, et tels que le moteur à vapeur handicapé cependant par un rendement et une puissance massique faibles. Mais les systèmes thermomécaniques ne peuvent satisfaire à la fois toutes les exigences précédentes. C'est pourquoi on s'oriente vers l'emploi de sources électrochimiques, qui suppriment les deux nuisances pollution et bruit et sont généralement très bonnes du point de vue du rendement global. Le principal écueil concerne le problème du stockage de l'énergie électrique. Bien que des progrès importants aient été obtenus avec les solutions classiques

  14. Consequences of Windscale accident (October 1957) and study of the validity of the Sutton's mathematical model of atmospheric diffusion (1960); Etude des consequences de l'accident de Windscale (Octobre 1957) et de la validite du modele mathematique de diffusion atmospherique de Sutton (1960)

    Energy Technology Data Exchange (ETDEWEB)

    Doury, A [Commissariat a l' Energie Atomique (S.C.R.G.R.) Saclay (France).Centre d' Etudes Nucleaires; Martin, J J [Electricite de France (EDF)(S.L.P.R.), 37 - Chinon (France)

    1960-07-01

    The reactor accident that happens at the number 1 pile of Windscale in 1957 was followed by a discharge of radioactive products into the atmosphere from the 1.X.1957 at 4.30 PM to the 12.X.1957 at 3.10 PM. On october the 11{sup th} it was possible to say that there was no more risk either of external irradiation or inhalation. But in adopting a M.A.C. of 0,1 {mu}curie of iodine 131 per litre of milk, the Authority had to control the milk delivery till november 23{sup rd} on a 500 km{sup 2} area. On the other hand, this exceptional accident permit to verify that Sutton's atmospheric diffusion model could give an easy means to foresee, with a sufficient approximation, the consequences of a dispersion of radioactive products into the atmosphere. (author) [French] L'accident survenu a la pile numero 1 de Windscale en 1957 a entraine l'emission de matieres radioactives dans l'atmosphere du 10 octobre a 16h30 au 12 octobre a 15h10. Le 11 octobre, on pouvait dire qu'il n'y avait plus de risque d'irradiation externe ni de danger par inhalation. Mais en adoptant une C.M.A. de 0,1 {mu}curie d'iode 131 par litre de lait, les autorites ont du reglementer la consommation du lait jusqu'au 23 novembre sur une etendue d'environ 500 km{sup 2}. D'autre part, cet accident exceptionnel a permis de verifier que le modele de diffusion atmospherique de Sutton pouvait fournir un moyen commode de prevoir avec une approximation suffisante les consequences d'une dispersion de produits radioactifs dans l'atmosphere. (auteur)

  15. Intérêt des collectivités pour l'implantation d'arbres nourriciers dans les parcs urbains : le cas de Villa El Salvador, au Pérou

    Directory of Open Access Journals (Sweden)

    Lafontaine, M.

    2017-01-01

    Full Text Available Intérêt des collectivités pour l'implantation d'arbres nourriciers dans les parcs urbains : le cas de Villa El Salvador, au Pérou. A study was conducted in Villa El Salvador, Peru, in order to evaluate the interest of local community members in establishing food trees within neighbourhood public green areas. Focus groups and semi-directed interviews conducted with the community actors allowed to identify their perceptions regarding the role these trees could play, the most appropriate management methods for their establishment and maintenance, as well as the best ways of allocating their products. SWOT ( Strength - Weaknesses – Opportunities- Threats and AHP (Analytical Hierarchisation Process analyses permitted to identify the most important favourable and restrictive factors affecting the long-term success of this production strategy. Results show that the possibility of harvesting edible products for family consumption, neighbourhood food aid programs or sale would motivate the inhabitants to contribute to the activities related to the establishment and maintenance of food trees. However, in order to be successful, the implementation of food trees within public green areas has to be in line with neighbourhood policies developed by the local population and to carefully anticipate possible sources of conflicts.

  16. Suburbs: the next slum? Explorations into the contested terrain of social construction and political discourse Les zones péri-urbaines : des taudis en devenir ? Explorations du territoire contesté de la construction sociale et du discours politique

    Directory of Open Access Journals (Sweden)

    Markus Hesse

    2010-12-01

    Full Text Available Suburbanization and suburbia have not only represented a substantial component of urbanization for decades, but have also been subject to social construction and political contestation. This usually unfolds in highly critical assessments of suburban landscape by research, policy and planning. Thus, suburbs are discursively framed as dystopia, and as the demise of the urban as such. In light of most recent developments on real estate and energy markets, and taking into account an at least perceived ‘renaissance’ of inner cities in metropolitan regions, the image of suburbs has changed again. It now represents despair and decline, even the next slum. Such discursive representations are based on an urban view rather than on a solid exploration of suburbs, and are ideologically constructed. In this context, this paper builds on the discursive shift in urban views and aims at reconstructing the way suburbs have been perceived and discursively framed in the past. By focusing on German developments and a comparative (North American perspective, it argues that discursive practice confirms the long-standing professional neglect of suburbs; however, this has not resulted in a paradigm shift in ‘material’ urban development as yet. The main contention is that the suburbs are neither heaven nor hell, neither paradise nor slum. They just represent an ordinary, legitimate part of the urban, a hybrid that still lacks precise denomination regarding terminology, meaning and identity.La banlieue et le phénomène de suburbanisation ne constituent pas seulement depuis quelques décennies une composante cruciale de l’urbanisation, mais sont également objets de construction sociale et de contestation politique. Le paysage suburbain est habituellement soumis à des évaluations très critiques par la recherche, la politique et l’aménagement. Ainsi il est représenté dans ces discours comme une dystopie, signifiant la mort de l’urbain en tant que tel

  17. Les accidents du travail dans le transport urbain en commun de la ville province de Kinshasa, République Démocratique du Congo: une étude transversale descriptive

    Science.gov (United States)

    Wangata, Jemima; Elenge, Myriam; De Brouwer, Christophe

    2014-01-01

    Introduction Le transport en commun urbain constitue un secteur où les travailleurs sont très exposés aux accidents du travail. Cette étude visait une description épidémiologique des accidents du travail dans le secteur informel du transport en commun à Kinshasa en vue d'apporter les pistes d'amélioration de la sécurité des travailleurs dans cette activité. Méthodes Un questionnaire sur les accidents du travail, administré en Décembre 2012 a permis d'explorer les tendances significatives entre les accidents et leurs circonstances, leurs facteurs associés, leurs conséquences au sein d'une population des travailleurs (n = 472) du transport en commun à Kinshasa. Résultats Durant les 12 derniers précédant l’étude 76.5% des travailleurs ont connu au moins un accident du travail, 54,8% ont connu un arrêt d'au moins 1jour. Les accidents liés à la circulation routière étaient plus important suivis des chutes. Les facteurs ayant montré des différences significatives étaient le travail sous l'influence de l'alcool et le port des équipements de protection individuelle. Les plaies (46,3%) et les contusions (39,4%) étaient les lésions les plus courantes. Les membres supérieurs (51,3%) et inférieurs (30,7%) étaient les plus atteints. 76,6% des travailleurs ont assumé seuls leur prise en charge médicale. Conclusion L'incidence des accidents du travail dans ce secteur est très élevée. La mise en place d'une politique de prévention et gestion de différents facteurs associés ainsi qu'un système de déclaration d'accidents est nécessaire dans ce secteur. Les patrons ainsi que les politiques devraient veiller à une prise en charge médicale correcte pour des travailleurs accidentés. PMID:25667703

  18. Organizzazione spaziale e reti comunitarie come strategie di contrasto alla criminalità urbana / Organisation dans l’espace et réseaux communautaires comme stratégies pour combattre la criminalité urbaine / Spatial organisation and community networks as strategies to fight urban crime

    Directory of Open Access Journals (Sweden)

    Batella Wagner

    2012-10-01

    Full Text Available Cet article présente une réflexion sur le rôle de la population et de son organisation dans l’espace pour combattre la criminalité urbaine. Il existe une riche bibliographie sur le sens d’appartenance, la communauté et les relations communautaires vues comme un moyen d’organiser un groupe de personnes pour combattre les phénomènes criminels. Toutefois, même s’il faut admettre que l’espace joue un rôle majeur dans ces processus, il est regrettable de mettre en évidence que peu d’études mettent l’accent sur cette question. Pour aborder cette approche, les auteurs proposent donc un travail dans deux directions. La première s’adresse à la dimension théorique de la relation entre crime et espace, soulignant le rôle de la géographie du crime pour combattre la criminalité urbaine. Avec la deuxième, les auteurs présentent une étude de cas relative à la création d’un réseau de voisins sur un quartier de la ville de Belo Horizonte au Brésil, dans le but d’évaluer cette expérience en matière de lutte contre la criminalité urbaine. Les résultats montrent que l’espace est une dimension prépondérante dans les études sur la criminalité et aussi pour la combattre.AbstractThis article presents a reflection on the role of population and its spatial organisation to fight urban crime. An extensive literature exists on the sense of belonging, community and community relations as a way of organising a group of people to fight crime. However, even accepting that space plays an important role in these processes, few studies focus on this topic. To tackle these issues, the article proposes two directions. The first one will address the theoretical dimension of the relationship between crime and space, emphasizing the role of the geography of crime to fight urban crime. Then, the authors present a case study of the establishment of a network of neighbours in a district of the city of Belo Horizonte (Brazil, in order

  19. La résidence urbaine des administrateurs coloniaux de Saint-Domingue dans la seconde moitié du XVIIIe siècle Urban residency of the colonial administrators of Saint-Domingue in the second half of the 18th century

    Directory of Open Access Journals (Sweden)

    Zélie Navarro-Andraud

    2009-05-01

    Full Text Available Colonie la plus riche du royaume de France au XVIIIe siècle, Saint-Domingue a connu une structuration spécifique de son territoire en vertu de l’économie de plantation alors développée dans l’île. La présence de deux villes d’importance dans l’île (Port-au-Prince et Le Cap permet d’aborder cette problématique. Lieu du pouvoir politique et économique, la cité apparaît également comme le lieu de résidence privilégié des administrateurs coloniaux. Cette affirmation, dans le contexte colonial dominguois, n’est en rien l’énoncé d’une évidence. En effet, nombre d’administrateurs préfèrent résider sur leur « habitation », pour des questions personnelles de gestion de biens, plutôt que d’occuper un logement en ville. Ainsi, la question de la résidence urbaine des administrateurs se révèle être pertinente dans l’étude des sociétés coloniales, ouvrant la voie à de multiples interrogations : Quelles spécificités du développement urbain caractérisent la ville coloniale ? Quels sont les divers types de logements urbains occupés par les administrateurs coloniaux ? Quelles en sont les caractéristiques ? Enfin, appréhender ces deux questionnements, n’est-ce pas également s’interroger sur la perception qu’ont les administrateurs de la cité coloniale et sur l’usage qu’ils font de l’espace urbain ?The territory of Saint-Domingue, the richest French colony of the 18th century, was structured by the plantation economy which developed on the island. The existence of two important cities on the island (Port-au-Prince and Le Cap provides a way of approaching this issue. The site of political and economic power, the city was also the preferred place of residence of the colonial administrators. This assertion is not, in the colonial context of Saint-Domingue, by any means obvious. Indeed, many administrators preferred to live on their plantations to allow them to manage their personal

  20. Actes de la conférence " Aux frontières de l'urbain. Petites villes du monde : émergence, croissance, rôle économique et social, intégration territoriale, gouvernance "
    Conference Proceedings "At the Frontiers of Urban Space. Small towns of the world: emergence, growth, economic and social role, territorial integration, governance"

    OpenAIRE

    Moriconi Ebrard, François; Chatel, Catherine; Bordagi, Julien

    2014-01-01

    Sous la Direction de François Moriconi-Ebrard, Catherine Chatel et Julien Bordagi Éditeur : UMR ESPACE - Avignon, Case 19, 74 rue Louis Pasteur, 84029 Avignon Cedex Collection : Actes Avignon - ISBN : 978‐2‐9105‐4509‐1; Publication collective. La conférence internationale " Aux frontières de l'urbain " s'est déroulée à l'Université d'Avignon et des Pays de Vaucluse du 22 au 24 janvier 2014. Elle a été organisée à l'initiative d'un groupe de chercheurs de l'UMR 7300 ESPACE spécialistes de la v...

  1. Características das ilhas de calor em cidades de porte médio: exemplos de Presidente Prudente (Brasil e Rennes (França Caractéristiques des îlots de chaleur urbains dans des villes de taille moyenne: exemples de Presidente Prudente (Brésil et Rennes (France

    Directory of Open Access Journals (Sweden)

    Hervé Quenol

    2009-10-01

    Full Text Available Este trabalho teve como objetivo analisar e comparar as características térmicas do clima urbano em duas cidades de médio porte: Rennes (França e Presidente Prudente (Brasil, por meio de registros da temperatura do ar (pontos fixos e medidas itinerantes e dados térmicos de superfície obtidos pelo tratamento de imagens do satélite Landsat 7. Verificou-se o aumento das temperaturas, ligeiramente maiores em Rennes, do que em Presidente Prudente e a geração de ilhas de calor urbanas (ICU, decorrentes do processo de urbanização nas duas cidades.Cet article a pour objectif d’étudier les caractéristiques du climat dans deux villes moyennes (Rennes en France et Presidente Prudente au Brésil à partir de trois types de mesures de températures : des mesures réalisées dans des stations fixes, des mesures itinérantes et des données de températures de surface obtenues à partir d’images du satellite Landsat 7. On montre que l’augmentation des températures est légèrement plus importante à Rennes qu’à Presidente Prudente ainsi que le développement d’îlots de chaleur urbains (ICU résultant de l’extension de la tache urbaine des deux agglomérations.This paper aims to analyze and compare thermal characteristics of urban climate of two middle size cities: Rennes (France and Presidente Prudente (Brazil, by registering air temperature  (network pointes and mobile transect and surface data obtained by using Landsat7 satellite thermal images. Results shows that temperature grows faster in Rennes than Presidente Prudente and urban heat island generation (UHI by different cities urbanization processes.

  2. 2247-IJBCS-Article-Urbain Kouakou

    African Journals Online (AJOL)

    hp

    ground water. For this purpose, the adsorption of imidacloprid on two different soils is investigated. ... However, only 2.3% is fresh water available for human ... biological and chemical process including volatilization, infiltration, retention and.

  3. INTERMODALITE ET DEVELOPPEMENT URBAIN DANS L ...

    African Journals Online (AJOL)

    Administrateur

    modalité et l'inter-modalité entre les modes et les services, tout cela offre des .... distances de parcours plus importantes ou l'accès plus restreint au transport collectif en sont .... Ces derniers détiennent 90% du marché en termes. 4 Direction des ... les terminaux national et international de l'aéroport Houari. Boumediene5.

  4. L'Agriculture urbaine prend racine

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

    CRDI

    poulaillers sont toujours très propres; les employés doivent porter des bottes de caoutchouc et se tremper les pieds dans un désinfec- tant chaque fois qu'ils entrent ou sortent. La nourriture des volailles est préparée sur place, selon les critères de Mme Kabugo; les quan- tités fournies sont bien précises, afin de contrôler le ...

  5. LE CONCEPT DE RISQUE NATUREL URBAIN

    Directory of Open Access Journals (Sweden)

    FLORINA GRECU

    2011-11-01

    Full Text Available The rapid development of the cities and growth of urban population have determined an inadequate use of some terms and concepts, in order to include in the research field specific phenomena and apply appropriate preventive measures. One such concept is about the hazards occurring inside the urban territory – urban hazards. The term urban can sometimes be associated to anthropogenic/industrial hazards or social hazards, and less to natural hazards.Natural hazards in urban areas are generally common for that geographical region. There is no such thing like special urban hazards. What is specific to urban area is the anthropogenic factor, which brings to risk various risk elements, including population, through his activities, density, or buildings. As a consequence, transition from hazard to risk is faster in time and space. Another feature is the multi- and interdisciplinary character of the genetic type of hazards. The so-called natural hazards are often caused by an anthropogenic factor. In the special literature urban risk is simply defined as the risk bounded by the urban territory or area, and is classified into: natural risk; industrial and technology risk; diffused risk.

  6. 2503-IJBCS-Article-Urbain Paul Gnonsoro

    African Journals Online (AJOL)

    hp

    3 Laboratoire Central d'Agrochimie et d'Ecotoxicologie (LCAE), 04 BP 612 Abidjan ... benzo(a)pyrène adsorbée dans l'eau croissait avec la masse de charbon activé .... électrique. (Advantec. KL-280). Les caractéristiques du charbon actif sont.

  7. 2247-IJBCS-Article-Urbain Kouakou

    African Journals Online (AJOL)

    hp

    ground water. For this purpose, the adsorption of imidacloprid on two different soils is investigated. ... were determined to be 4.139 mg/g and 5.74 mg/g of soils from banana field and cocoa field respectively.The ... Earth is called blue planet because it contains .... researchers. .... empirical model that incorporates features of.

  8. La Gestion des Déchets Urbains

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

    les acteurs et leurs responsabilités, la perception et l'exercice de ces ..... Cependant, contre toute attente, la présidence de cette commission n'a pas été confiée au ...... A cause de ces facteurs d'attraction, la migration des régions rurales aux ...... exemple, pour la prestation des services primaires d'éducation et de santé).

  9. Foules, espaces publics urbains et apprentissage de la co-présence chez les adolescents des quartiers populaires d’Ile de France Crowds, urban public spaces and learning co-presence: the Case of the Adolescents residing in the popular districts of the Ile-de-France

    Directory of Open Access Journals (Sweden)

    Nicolas Oppenchaim

    2010-09-01

    Full Text Available Cet article porte sur le rapport qu’entretiennent les adolescents à la foule urbaine et sur la manière dont ils apprennent à y trouver une place. Pour ce faire nous procéderons en trois temps. Nous exposerons tout d’abord en quoi, s’appuyant sur les travaux de R. Park et G. Tarde, Isaac Joseph fait du passage de la foule au public une des caractéristiques majeures des sociétés contemporaines. Ce passage concerne à la fois l’espace métaphorique des mobilisations collectives, mais également l’espace urbain : le propre des villes contemporaines n’est pas les grands rassemblements de foule dominés par les émotions, mais les espaces publics, lieux de co-présence organisés autour de l’inattention civile. Ces espaces offrent ainsi des possibilités de rencontre tout en garantissant un droit à l’intimité.Cependant nous montrerons dans un second temps que cette perception apaisée des grands rassemblements dans la ville ne va pas de soi, notamment à l’adolescence. Il est donc nécessaire d’introduire la problématique de l’apprentissage dans les réflexions sur les espaces publics urbains. Ainsi, une partie des adolescents des quartiers populaires d’Ile de France ont une perception de ces lieux de co-présence très proche de celle développée dans les discours du 18ème et 19ème siècle sur la peur des foules urbaines. Plus largement, les adolescents de quartiers populaires se différencient dans leurs discours par quatre grandes positions idéal-typiques vis-à-vis des foules urbaines : « foule source d’animation potentielle », « foule indifférente », « foule menaçante », ou « foule espace public ». Nous verrons alors dans un troisième temps que ce rapport différencié des adolescents à la foule est à mettre en relation avec le lien entretenu avec le quartier de résidence et les modalités d’apprentissage de la mobilité.This article aims at further documenting the relationship of

  10. Pollution atmospherique par emission de gaz d'echappement des ...

    African Journals Online (AJOL)

    The objective of the present work is to study the air pollution generated by the gases of exhaust in the city of Porto-Novo to Benin. The quantification of the different pollutants or particles given out on the one hand by the vehicles, and the determination of the level of the pollution of every particle on the other hand, allowed us ...

  11. Air pollution and floristic biodiversity; Pollution atmospherique et biodiversite floristique

    Energy Technology Data Exchange (ETDEWEB)

    Grub, A.; Bungener, P.; Contat, F.; Nussbaum, S.; Endtner, V.; Fuhrer, J. [Station Federale de Recherches en Agroecologie et Agriculture (FAL), Liebefeld-Berne (Switzerland). Institut de Recherches en Protection de l' Environnement et en Agriculture (IUL)

    1999-06-01

    The number of reports on negative effects of air pollution on biodiversity is increasing. Here, examples from the literature are presented which concern effects of fluoride, deposition of nitrogen, and ozone. Today, nitrogen loads and levels of tropospheric ozone seem to be most relevant forms of air pollution affecting species diversity of the flora. Results from recent investigations of ozone effects at Liebefeld indicate that the loss of floristic diversity in permanent meadows is possible because of the high relative sensitivity of some typical species. Further studies will be necessary to validate the results obtained from experiment with single plants at the level of the intact plant community in the field, and to identify the critical level of ozone to protect the floristic biodiversity of meadows. (authors)

  12. Urban agriculture in the metropolitan area of Mexico city L’agriculture urbaine dans la métropole de Mexico Agricultura urbana en el área metropolitana de la Ciudad de México

    Directory of Open Access Journals (Sweden)

    H. Losada

    2011-04-01

    Full Text Available Mexico City and the rest of the country do not escape from the social and economic inequalities of the present economic model applied worldwide.  Agriculture is a traditional activity in Mexico. This urban productive process has particular features: the predominance of smallholding, the restricted use of physical space, and the use of recycled materials and organic wastes. The population engaged in agriculture is heterogeneous, and includes women and children. There are a couple of production systems: the suburban, which uses the “chinampa” to produce mainly vegetable and flowers; and the periurban system, which has two sub-systems, the “terraces” producing nopal-vegetable and maize and the “Valleys” producing tuna (fruit and amaranth. The wastes of other systems (straw  and manure are used in these places. The production systems combine pre-hispanic and modern tools, such as the tractor and coa. The products of these sites are sold in tourist areas of ecological importance. These technologies are reproducible, socially inclusive and environmentally friendly, but government support is needed.developing countries, recycling, sub-urban, peri-urban, Opuntia, chinampaMexico et le reste du Mexique n’échappent pas aux inégalités sociales et économiques induites par le modèle économique qui prédomine actuellement dans le monde entier. L’agriculture est une activité traditionnelle au Mexique. Ce processus de production urbain présente des caractéristiques particulières : prédominance de petits lopins de terre, utilisation limitée de l’espace et utilisation de matériaux et de déchets organiques recyclés. La population engagée dans l’agriculture est hétérogène et comprend des femmes et des enfants. Deux systèmes de production cohabitent : le système suburbain qui utilise les « chinampa » pour produire essentiellement des légumes et des fleurs ; et le système périurbain qui comprend deux sous-systèmes : les

  13. Il dilemma di Gerusalemme. Il problema dello sviluppo urbano tra politica e integrazione delle comunità / Le dilemme de Jérusalem. Le problème du développement urbain entre politique et intégration des communautés / The dilemma of Jerusalem: the question of urban development between politics and integration of the communities

    Directory of Open Access Journals (Sweden)

    Succi Marco

    2012-10-01

    Full Text Available Malgré l’espoir de résoudre de manière équitable la question de la souveraineté de Jérusalem liée à la fin de l’administration britannique et aux plans de partage de la Palestine proposés par l’ONU à la fin de la Seconde Guerre Mondiale, la Ville Sainte a été divisée entre Israël et la Jordanie après la Guerre israélo-arabe de 1948. Elle restera fractionnée jusqu’à la Guerre des Six Jours (1967 quand Israël conquiert la Ville Sainte et étend sa souveraineté sur les terres habitées par les populations arabes, en les annexant quelques années après. Depuis lors, le développement urbain de Jérusalem a subi une expansion sans précédent, soulevant les critiques de la communauté internationale et de l’opinion publique.L’article analyse les politiques relatives à l’expansion urbaine de Jérusalem et la question du rééquilibre démographique entre Arabes et Juifs résultant de décennies de décisions politiques contestées.Quel est le poids des exigences de sécurité et des objectifs politiques liés au conflit israélo-palestinien dans les plans d’urbanisme visant à l’extension de Jérusalem ?Despite the hope to settle the issue of the sovereignty of Jerusalem triggered by the announcement of the end of the British Mandate and the 1947 UN Partition Plan, the Holy City was divided between Israel and Jordan after the first Israeli-Arab war in 1948. No change would alter the status of the city until 1967 (Six-Day War when Israel conquered the whole city and extended its own sovereignty on lands inhabited by Palestinians, proceeding with formal annexation some years later. Since then the Jerusalem development has undergone an unprecedented era of urban expansion, attracting criticism from the whole international community and public opinion. The article analyses the policies underlying the Jerusalem urban development and the demographic balance between Jews and Arabs resulting from controversial political

  14. Social sciences and comparative research in Europe : cross-national and multi-disciplinary projects for urban development. The role of geography Sciences sociales et recherche comparative en Europe : projets transnationaux et projets multidisciplinaires de développement urbain. Le rôle de la géographie

    Directory of Open Access Journals (Sweden)

    Armando Montanari

    2012-12-01

    Full Text Available In the aftermath of the Second World War, UNESCO sought to build peace in the world through the exchange of knowledge. To this end, it developed a number of initiatives to encourage international cooperation among social scientists. These initiatives were of particular importance in Europe, where there was a clear divide between Eastern and Western European countries. After the fall of the Berlin Wall, comparative research came to signify the transfer of knowledge and the promotion of innovation. Over the past two decades the study of urban phenomena, alongside social and economic issues, has taken on a strategic role in reducing pollution, safeguarding the environment and improving the quality of life of inhabitants. The process of enlarging the scope and objectives of policy has also led to a change in the role played by geography, which is increasingly required to offer instruments of scientific communication between the natural and social sciences.Après la Seconde Guerre mondiale, l’UNESCO a tenté de construire la paix dans le monde à travers l’échange de savoirs. A cette fin, elle a mis sur pied un certain nombre d’initiatives visant à encourager la coopération scientifique. Celles-ci revêtaient une ampleur toute particulière en Europe, où existait un clivage net entre pays de l’Est et de l’Ouest. Suite à la chute du Mur de Berlin la recherche comparative signifia le transfert de savoirs et la promotion de l’innovation. Ces deux dernières décennies, l’étude des phénomènes urbains, de même que les questions sociales et économiques, ont pris un rôle stratégique par la réduction de la pollution, la sauvegarde de l’environnement et l’amélioration de la qualité de vie des habitants. Les processus d’élargissement du champ et des objectifs politiques ont également mené à une modification du rôle joué par la géographie, qui est de plus en plus sollicitée pour offrir des instruments de communication

  15. Centralisation, décentralisation et accès aux services urbains : le cas de l’enlèvement des ordures ménagères à Abidjan Centralization, decentralization, access to urban public services : waste collection in Abidjan

    Directory of Open Access Journals (Sweden)

    Amandine Henry

    2013-03-01

    Full Text Available Cet article traite de l’inégalité d’accès aux services publics urbains dans les pays en développement et, plus particulièrement, de la question de l’accès au service d’enlèvement des ordures ménagères à Abidjan. Cette question est étroitement liée au mouvement de centralisation, décentralisation et recentralisation qui a affecté la gestion de ce service au cours des dernières décennies. Chaque étape de l’avancée de la Côte d’Ivoire dans le processus de décentralisation a provoqué des changements institutionnels dans la gestion des ordures ménagères à Abidjan ; tous ont eu des effets spécifiques sur l’accès de la population à ce service. Ces effets sont étudiés à l’échelle des communes et des quartiers à travers une enquête de terrain, et sont liés aux caractéristiques socio-économiques des quartiers. Une analyse comparative entre deux communes de standing opposé, ainsi que l’examen des aspects historiques de la problématique, s’attachent à identifier les facteurs-clés d’une telle inégalité d’accès au service d’enlèvement des ordures ménagères à Abidjan.This paper deals with the inequality of access to the urban public utilities in developing countries, and more accurately with the issue of the access to the waste collection in Abidjan. This question is closely linked with the centralization, decentralization and recentralization movements that affected this service management for the last decades. Each stage of the decentralization process in Ivory Coast brought institutional changes in waste collection management in Abidjan. Each of them had specific consequences on the access of people to this service. These consequences are investigated on a local scale and are linked to the socio-economic characteristics of the studied areas. Together with the focus on the historical aspects of the problematic, a comparative analysis between two districts of opposite standing attempts

  16. Automatic-Control Challenges in Future Urban Vehicles: A Blend of Chassis, Energy and Networking Management Les défis de la commande automatique dans les futurs véhicules urbains : un mélange de gestion de châssis, d’énergie et du réseau

    Directory of Open Access Journals (Sweden)

    Savaresi S.M.

    2012-10-01

    Full Text Available The topic of this paper is the discussion of new challenges that the scientific field of automatic-control will face in the next decades, in the area of vehicles control. The focus is on urban vehicles for personal mobility, since this type of vehicles will be subject to the biggest changes in the next decades. The paper is articulated in three sections – in a top-down framework – briefly addressing and discussing the following items: the main drivers, which will force a change in urban personal mobility; the main types of vehicles, which are expected to address at best such drivers; the main automatic-control challenges on such type of vehicles. The scope of this paper is purposely non-technical. Its aim is mainly to discuss the emerging new challenges from the perspective of the automatic-control scientists and practitioners. The goal of the paper is to establish a discussion framework on the problems and opportunities, which will arise in this field, in the near future. Le sujet du présent article est une discussion sur les nouveaux défis auxquels le domaine scientifique de la commande automatique des véhicules va faire face dans les prochaines décennies. L’accent est mis sur les véhicules urbains destinés à une mobilité individuelle, puisque c’est ce type de véhicules qui va faire l’objet des plus grands changements dans les prochaines décennies. Le présent article s’articule, selon une démarche descendante, en trois sections abordant et discutant brièvement les éléments suivants : les principaux moteurs qui vont imposer un changement en matière de mobilité individuelle; les principaux types de véhicules qui sont attendus pour répondre au mieux à de tels moteurs et les principaux défis de la commande automatique sur un tel type de véhicules. À dessein, la portée du présent article est non technique. Son but est principalement de discuter les nouveaux défis émergeants, à partir de perspectives des

  17. Distribution spatiale intra-urbaine des particules fines : monitoring ...

    African Journals Online (AJOL)

    SARAH

    30 sept. 2014 ... En outre, l'accumulation des particules fines est faible pendant un mois pluvieux par rapport à un mois sec ..... benjamina, et la structure (tige, branches) des arborées ... par Zhang et al., (2006) sur des feuilles de Pinus pumila.

  18. Kampala, Ouganda : L'agriculture urbaine prend racine | CRDI ...

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

    21 avr. 2006 ... ... consultatif pour la recherche agricole internationale (GCRAI). .... des terrains est un enchevêtrement de modes d'occupation coutumiers, coloniaux et modernes. De l'avis des agriculteurs, les procédures actuelles d'accès au sol à ... être mises en marché plus rapidement que la variété locale courante.

  19. TIC et microentreprises en milieu urbain : optimisation des ...

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

    La population des villes croît à un rythme plus rapide que l'ensemble de la population mondiale, surtout dans les pays en développement. Les technologies de l'information et de la communication (TIC), notamment la téléphonie mobile, semblent s'implanter partout très rapidement. On parle souvent des ...

  20. Perception urbaine, distraction et stratification chez Benjamin, Eisenstein et Vertov

    OpenAIRE

    Rousse, Pascal

    2008-01-01

    La ville à l’écran est le substrat imaginaire et historique du cinéma. Mais le cinéma, burlesque et soviétique, transforme ce contexte tout en constituant sa mémoire. Walter Benjamin inaugura cette problématique avec la notion de « distraction », liant architecture et cinéma sur le fond du paradigme de la stratification de l’appareil psychique chez Freud.

  1. Impacts des effluents liquides industriels sur l'environnement urbain ...

    African Journals Online (AJOL)

    industrialisation l'un des maillons essentiels du développement, après le succès de l'agriculture. Mais la mise en oeuvre de cette politique pose parfois des problèmes d'environnement à Abidjan. La présente étude a pour objectif principal ...

  2. Tri-generation in urban networks; Trigeneration en reseau urbain

    Energy Technology Data Exchange (ETDEWEB)

    Malahieude, J.M. [Trigen Energy Corp., New-York (United States)

    1996-12-31

    The concepts of tri-generation (simultaneous production of heat, electric power and refrigerating energy) and thermal energy distribution networks, are presented. The different components of the tri-generation system from Trigen Energy Corp. are ammonia as a refrigerant for the production of cooled water, screw compressors, gas turbines and an induction motor-generator in order to optimize the combined gas turbine and compressor utilization. The energy efficiency and pollution reduction of the system are evaluated; the system has been enhanced through re-powering and post combustion

  3. Comportement des polluants des eaux pluviales urbaines en ...

    African Journals Online (AJOL)

    développement et la croissance des organismes vivant dans l'eau et particulièrement les micro- organismes. Le suivi des températures enregistrées oscille entre 9 et 16°C dans les trois sites d'observation durant la période ... de la lumière du soleil. Le site C est bien aéré et .... Effets de différents modes de gestion des eaux ...

  4. La portee des projets urbains recents pour la grande ville ...

    African Journals Online (AJOL)

    ... mobi-lisé, le potentiel de lisibilité qu'elle recèle pourrait la consolider dans le statut de ville intermédiaire aux échelles nationale et méditerra-néenne. Un statut qu'elle pourrait acquérir à partir d'une triangulation d'actions stratégiques pour consolider la connectivité, créer une syner-gie entre PME/PMI et tourisme, donner ...

  5. Le retour de la sociologie urbaine critique, enfin.

    Directory of Open Access Journals (Sweden)

    Bernard Jouve

    2005-09-01

    Full Text Available La lecture de cet ouvrage suscite à la fois le respect et la gratitude. Le respect car, N. Brenner, jeune sociologue à la carrière fulgurante, nous propose une mise en perspective et un état des lieux qui était devenu absolument indispensable de la recherche en sciences sociales portant sur les liens entre la transformation des États européens et la place qu’occupent les villes dans un ordre politique et économique en recomposition. Pour ceux qui s’intéressent à ce vaste chantier ...

  6. Pollution des eaux à usages domestiques dans les milieux urbains ...

    African Journals Online (AJOL)

    puits, forage, réseau public) sont confrontées à la pollution physique, chimique et microbiologique. Le niveau de pollution est dû aux germes de contamination fécale et pathogènes, des polluants azotés et les polluants métalliques toxiques.

  7. Habitat et environnement urbain au Viêt-nam

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

    Avant 1985, la construction et la gestion du logement au Viêt-nam étaient en ...... du contrôle administratif et n'ont pas été en mesure d'inciter le développement ...... et les syndicats, il est toutefois encore trop tôt pour juger de leur performance.

  8. Pollution des eaux à usages domestiques dans les milieux urbains ...

    African Journals Online (AJOL)

    des polluants azotés et les polluants métalliques toxiques. ..... l'eau sont le plus souvent transmis par voie ... constituent les éléments traces métalliques et ..... du charbon ou de déchets, dépôts de résidus industriels, utilisation d'engrais .... humide. : Cas du. Département d'Abengourou (Sud-Est de la Côte. D'ivoire). Larhyss ...

  9. Pollution urbaine : la France sous le dôme

    OpenAIRE

    Laurent, Eloi

    2017-01-01

    Un an exactement après avoir accueilli la COP21, Paris suffoquait début décembre sous un dôme de pollution, mais aussi Lyon, Villeurbanne, Marseille, Avignon, Rouen ou Grenoble. Airparif, qui a relevé un niveau de particules fines de 146 µg/m3 à Paris en moyenne pour le 1er décembre, précisait dans un communiqué qu’il s’agissait là d’un des pics hivernaux de pollution les plus sévères de ces dix dernières années, les précédents remontant à janvier 2009 et décembre 2007.

  10. How a Brazilian Firm is Sustainably Solving the Problems of Urban Slums, One Community at a Time Une entreprise brésilienne résout durablement les problèmes des bidonvilles urbains, communauté par communauté Cómo una empresa brasileña está resolviendo de manera sostenible los problemas de las favelas, comunidad por comunidad

    Directory of Open Access Journals (Sweden)

    Diana de Castro

    2012-06-01

    Full Text Available Terra Nova, a for-profit social enterprise, helps urban slum dwellers obtain legal title to the land they occupy irregularly. By managing all aspects of the land regularization process, Terra Nova helps community residents purchase the land they live on, formalizing an important asset and catalyzing economic growth. This enables the government to implement much needed infrastructure such as running water, sewer systems, electricity and paved roads. The process offers triple bottom line results (i.e., social, environmental and economic benefits to these urban slums. It transforms dead asset into capital benefitting all stakeholders: 1 community residents purchase important assets, gain access to credit and are transitioned into the formal economy, 2 governments resolve complex, costly problems associated with urban slums and collect taxes and 3 land owners are compensated for their occupied property. Terra Nova's methodology for sustainable land regularization provides a dignified and empowering solution to formalizing property rights.Terra Nova, entreprise sociale à but lucratif, aide les habitants des bidonvilles urbains à obtenir les titres de propriété des terres qu’ils occupent illégalement. Terra Nova gère tous les aspects du processus de régularisation des terres et aide ainsi les résidents à acquérir la terre sur laquelle ils vivent, officialisant un bien important et catalysant la croissance économique. Le gouvernement peut ainsi mettre en œuvre de nombreuses infrastructures nécessaires comme l’eau courante, les réseaux d’assainissement, l’électricité et le revêtement des routes. Pour les bidonvilles urbains, ce processus génère des avantages de trois ordres : sociaux, environnementaux et économiques. Il transforme des biens improductifs en capital pour le bénéfice de l’ensemble des parties prenantes : 1 les résidents de la communauté achètent des biens importants, accèdent au crédit et intègrent l

  11. Urban agriculture as a part of a sustainable metropolitan development program: A case study in Mexico City L’agriculture urbaine dans le cadre d’un programme de développement métropolitain durable : Etude de cas à Mexico La agricultura urbana como Parte de un Programa de Desarrollo Metropolitano Sostenible : Un Caso Práctico en la Ciudad de México

    Directory of Open Access Journals (Sweden)

    Pablo Torres-Lima

    2010-11-01

    Full Text Available Planning land use processes are indispensable for designing policies and activities in peri-urban areas, above all because of the impact of the conversion of agricultural land for urban purposes and the possibility of reducing poverty and assuring the food supply. In Latin America, there are a limited number of studies which discuss institutional involvement and proposals for participative and multi-sector planning with the aim of generating viable conditions for urban agriculture in megacities, within the framework of sustainable development. This article analyzes the principal components of a planning process which promotes the development of agricultural production zones in Xochimilco-Tlahuac, Mexico City. The experience was conceptualized in 2008 with the integration of data obtained through fieldwork, interviews, ethnographic techniques and geomatics, in order to intervene in policies and strategic activities. The positive aspect of this work includes promoting the idea that it is critical to support urban agriculture, by district or metropolitan authorities, in order to address various issues on the city’s development agenda, from the perspective of strategic planning and the practice of their implementation.  We conclude that it is also necessary to re-assess the aspect of socio-territorial organization in the study region, in order to achieve an integrated, habitable and sustainable city by organizing agricultural activities in the rural areas of Mexico City.Les processus d’aménagement du territoire sont indispensables pour élaborer des politiques et des activités dans les zones périurbaines, principalement en raison de l’impact de la conversion des terres agricoles à des fins de développement urbain, et de la possibilité de réduire la pauvreté et d’assurer l’approvisionnement alimentaire. En Amérique Latine, peu d’études ont été menées sur l’implication et les propositions des institutions en faveur de l

  12. Studies of magnetism with inelastic scattering of cold neutrons; Etudes de magnetisme realisees a l'aide de la diffusion inelastique de neutrons froids

    Energy Technology Data Exchange (ETDEWEB)

    Jacrot, B [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1964-07-01

    Inelastic scattering of cold neutrons can be used to study some aspects of magnetism: spins waves, exchange integrals, vicinity of Curie point. After description of the experimental set-up, several experiments, in the fields mentioned above, are analysed. (author) [French] La technique de diffusion inelastique des neutrons froids est utilisee pour etudier certains aspects du magnetisme: ondes de spins, integrales d'echange, etude au voisinage du point de Curie, etc. Apres une description de l'appareillage, on analyse diverses experiences effectuees dans les domaines enumeres plus haut. (auteur)

  13. Gaseous atmospheric pollution. Gas measurement; Pollution atmospherique gazeuse. Mesure des gaz

    Energy Technology Data Exchange (ETDEWEB)

    Toupance, G [Paris-12 Univ., 94 - Creteil (France); Person, A [Laboratoire d' Hygiene de la Ville de Paris, 75 (France); Le Moullec, Y; Masclet, P; Perros, P E

    2004-09-01

    This article deals with the majority of pollutants which are present in gaseous phase in the low layer of the troposphere, of the proximity of sources to the distant areas where are in weak traces persisting substances or sub-products induced by photochemical reactions. The compounds described in this article are of interest for various reasons: either they are source tracers, or they draw attention for their impact on health or/and ecosystem. Their follow-up can also be in other approaches such as the understanding of reactional mechanisms and the support to modeling of the phenomena. Thereby, the range of the covered concentrations is very large: if the preoccupations are in most of the cases to answer to detection limits of about the ppb, for some substances, the requirements can be harder and we have then to orient oneself to techniques able to quantify at the level of ppt, sometimes less. Some pollutants are qualified of 'semi-volatile', that is to say they are the property to be present in gaseous phase and in particles in suspension in air. (O.M.)

  14. Set of counts by scintillations for atmospheric samplings; Ensemble de comptages par scintillations pour prelevements atmospheriques

    Energy Technology Data Exchange (ETDEWEB)

    Appriou, D.; Doury, A.

    1962-07-01

    The author reports the development of a scintillation-based counting assembly with the following characteristics: a photo-multiplier with a wide photo-cathode, a thin plastic scintillator for the counting of beta + alpha (and possibility of mounting an alpha scintillator), a relatively small own motion with respect to activities to be counted, a weakly varying efficiency. The authors discuss the counting objective, present equipment tests (counter, proportional amplifier and pre-amplifier, input drawer). They describe the apparatus operation, discuss the selection of scintillators, report the study of the own movement (electron-based background noise, total background noise, background noise reduction), discuss counts (influence of the external source, sensitivity to alpha radiations, counting homogeneity, minimum detectable activity) and efficiencies.

  15. Controle d'attitude d'un lanceur en phase atmospherique approche par applications gardiennes

    Science.gov (United States)

    Dubanchet, Vincent

    In a first phase, the modelling process underlines the presence of highly time varying parameters during the ascent, due to a fast mass variation along with propellant consumption. Linearizing the dynamical equations at six main flight instants yields linear time invariant models to be considered during control design. Each of them is to be stabilized by one control law, while respecting given specifications. The synthesis becomes even more complex when the bending modes are taken into account. Moreover, scheduling appears necessary to deal with the time variations. Indeed it is shown that no single gain setting is able to respect all the specifications along the trajectory. Furthermore, increasing complexity when modelling a whole launch vehicle pushes one to consider the model's errors and uncertainties. They represent a major issue in this study since it is asked to ensure the nominal performances in a robust fashion. Owing to their properties, guardian maps appear to be the most suitable tool to deal with such a problem of scheduling with robust performances. In light of this, the development of synthesis methods based on guardian maps is the main contribution of the project. It appears that actual state of the art in this field is focused on theoretical issues, whereas practical ones could be improved. Two approches are presented in the memoire. The first one is based on a graphical approach consisting in drawing the vanishing locus of guardian maps. A program using image analysis techniques is devised to check automatically which gain settings satisfy the constraints. The second one is based on an optimisation procedure involving guardian maps. Starting with the open loop system, the iterative process proposed ends up with a satisfactory gain setting for the closed-loop. These methods are tried and tested for the launch vehicle, with specifications from ASTRIUM-ST. Their practical application is motivated by the system complexity, the different kinds of constraints and the essential need for robustness. Many restrictions that finally bring about the interest and the efficiency of guardian maps for such a problem.

  16. Atmospheric pollution and health. An introduction; Pollution atmospherique et sante une introduction

    Energy Technology Data Exchange (ETDEWEB)

    Zmirou, D. [Universite-Faculte de Medecine, 38 - Grenoble (France)

    1996-12-31

    Physiological observations and pollution measurements allowed for the study of short and long term respiratory effects of tropospheric ozone and fine particulate pollution on man, depending on age and health factors. Risk reduction policies towards air quality, and criteria issues for atmospheric pollution control and abatement measures, are discussed

  17. Atmospheric muons reconstruction with Antares; Reconstruction de muons atmospheriques avec ANTARES

    Energy Technology Data Exchange (ETDEWEB)

    Melissas, M

    2007-09-15

    The ANTARES collaboration is building a neutrino telescope in the Mediterranean Sea. This detector contains 900 photomultiplier tubes, dispatched on 12 lines, in order to detect Cerenkov light from muon induced by neutrino interactions in the the vicinity of the detector. Currently the first 5 lines have been deployed. A first task consists in studying the stability of the detector calibration, which is a necessary step to understand the detector response. Then we studied optical properties of water, for this we developed a reconstruction method dedicated to LED Beacon. The extracted parameters are compatible with earlier measurements. A quality criteria to reject badly reconstructed track has been developed based on the likelihood of the tracks fit versus point fit. This has been applied to real data and a preliminary analysis of atmospheric muons with a 5-lines detector is performed. (author)

  18. The atmospheric pollution in a few words; La pollution atmospherique en bref

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    This paper takes stock briefly on the different pollution sources (carbon dioxide, nitrogen oxides, sulfur dioxide, VOC, methane...), the mechanisms (acidification, photochemical pollution, eutrophication, greenhouse effect, ozone...) and the effects on the health. (A.L.B.)

  19. Policemen exposure to atmospheric pollutants in Paris; Exposition des policiers aux polluants atmospheriques a Paris

    Energy Technology Data Exchange (ETDEWEB)

    Bugajny, Ch.; Coursimault, A.; Donati, J.; Vieillard, H. [Laboratoire Central de la Prefecture de Police de Paris, 75 (France); Ducos, P.; Gaudin, R. [Institut National de Recherche et de Securite, 54 - Vandoeuvre les Nancy (France)

    2000-07-01

    The objective of this study was to evaluate the effects of automotive pollution on police health in Paris, more particularly those that are working near streets and crossroads; police working indoors are included in measurements as a reference population. This work included individual exposure measurements to some urban pollution main indicators and biological determinations to estimate the impact of these pollutants on health. Biological measurements, including determinations of carboxyhemoglobin, lead in blood and trans, trans-muconic acid in urine were realised. Carbon monoxide and benzene individual exposure had been measured by the use of individual analysers and diffusive samplers respectively. Motorcycle policemen and policemen at crossroads are more exposed than reference population working indoor. CO mean exposure levels are 6, 8 mg/m{sup 3} for motorcycle policemen, 5, 4 mg/m{sup 3} for policemen at crossroads, compared to 3, 6 mg/m{sup 3} for policemen working indoors. Carboxyhemoglobin mean values before work are four to five times more important for smokers (4, 5 % HbCO) than no-smokers (1,0%HbCO). After work, these values are respectively 5,3 % and 1,1 %. Non-smokers agents don't reach the OMS value (2,5%HbCO), even after work. Smoking contributes to higher levels of CO in blood than car exhaust pollutants, even for high air pollutants concentrations. Lead blond levels, which average is 45{mu}g/l, are clearly smaller than the OMS value (200{mu}g/l). About non-smokers agents, benzene median exposures are 74 {mu}g/m{sup 3} for motorcycle policemen, 19 {mu}g/m{sup 3} for policemen at crossroads, compared to 8 {mu}g/m{sup 3} for sedentary agents. If motorcycle agents filled up the tank with gasoline, benzene median exposure level is 229 {mu}g/m{sup 3}. Differences between smokers and non-smokers benzene exposure are not significant. For non-smokers agents, median trans, trans muconic acid values after work are 0,06 mg/l for pollution exposed agents and 0,05 mg/l for sedentary policemen. There is no significant differences of trans, trans-muconic acid concentrations before and alter work, whatever the work may be. For smokers agents, median trans, trans muconic acid values after work are 0,15 mg/l for pollution exposed agents and 0,11 mg/l for sedentary policemen. Trans, trans-muconic acid most important increase during work is measured for motorcycle agents (0,06 mg/l). Differences of median biological results after work have been measured between no-smokers and smokers policemen (0,06 mg/l for sedentary agents, 0,07 mg/l for policemen at crossroads and 0,10 mg/l for motorcycle agents). Filling up the tank with gasoline has no significant influence on biological results. (authors)

  20. Como uma Empresa Brasileira está Resolvendo os Problemas de Bairros Urbanos de Forma Sustentável, Uma Comunidade de Cada Vez How a Brazilian Firm is Sustainably Solving the Problems of Urban Slums, One Community at a Time Une entreprise brésilienne résout durablement les problèmes des bidonvilles urbains, communauté par communauté Cómo una empresa brasileña está resolviendo de manera sostenible los problemas de las favelas, comunidad por comunidad

    Directory of Open Access Journals (Sweden)

    Diana de Castro

    2012-06-01

    Full Text Available Terra Nova, a for-profit social enterprise, helps urban slum dwellers obtain legal title to the land they occupy irregularly. By managing all aspects of the land regularization process, Terra Nova helps community residents purchase the land they live on, formalizing an important asset and catalyzing economic growth. This enables the government to implement much needed infrastructure such as running water, sewer systems, electricity and paved roads. The process offers triple bottom line results (i.e., social, environmental and economic benefits to these urban slums. It transforms dead asset into capital benefitting all stakeholders: 1 community residents purchase important assets, gain access to credit and are transitioned into the formal economy, 2 governments resolve complex, costly problems associated with urban slums and collect taxes and 3 land owners are compensated for their occupied property. Terra Nova's methodology for sustainable land regularization provides a dignified and empowering solution to formalizing property rights.Terra Nova, entreprise sociale à but lucratif, aide les habitants des bidonvilles urbains à obtenir les titres de propriété des terres qu’ils occupent illégalement. Terra Nova gère tous les aspects du processus de régularisation des terres et aide ainsi les résidents à acquérir la terre sur laquelle ils vivent, officialisant un bien important et catalysant la croissance économique. Le gouvernement peut ainsi mettre en œuvre de nombreuses infrastructures nécessaires comme l’eau courante, les réseaux d’assainissement, l’électricité et le revêtement des routes. Pour les bidonvilles urbains, ce processus génère des avantages de trois ordres : sociaux, environnementaux et économiques. Il transforme des biens improductifs en capital pour le bénéfice de l’ensemble des parties prenantes : 1 les résidents de la communauté achètent des biens importants, accèdent au crédit et intègrent l

  1. Museum-school interactions: the importance of continuing education programs for teachers in municipalities away from urban centres Interaction musée-école : l’importance des programmes de formation continue des enseignants dans les municipalités éloignées des centres urbains Interacción museo-escuela : la importancia de los programas de formación continua de profesores en localidades alejadas de los centros urbanos

    Directory of Open Access Journals (Sweden)

    Grazielle Rodrigues Pereira

    2011-09-01

    Full Text Available Due to a series of misconceptions about science, science centers and science museums have proposed projects to break the paradigm of science education focused on a small portion of the population. These centers and museums have developed strategies aimed at social inclusion in terms of their educational character, thereby investing in strategies to upgrade vocational education, among other actions. However, most of these areas are concentrated in large urban areas, preventing the participation of the poorest sectors of society. Thus, this study shows a report of a pilot teacher education program developed by the Espaço Ciência InterAtiva do IFRJ, a science museum located in a suburban area of Rio de Janeiro, showing that a scientific exhibition can contribute to the inclusion of teachers in these areas of informal education, and to their ongoing training.En raison d’un ensemble de conceptions erronées sur la science, les centres et les musées des sciences se proposent actuellement de rompre avec l’image de la science réservée à une petite partie de la population. Ces espaces développent des activités qui, par leur caractère éducatif, favorisent l’intégration sociale, et investissent de cette façon, entre autres actions, dans des stratégies de mise à niveau des professionnels de l’éducation. Toutefois, la plupart de ces espaces se concentrent dans les grands centres urbains, ce qui rend la participation des couches moins favorisées de la société bien plus difficile. Ainsi, ce travail porte sur l’exposé d’un programme pilote de formation continue des enseignants, développé par l’Espaço Ciência InterAtiva (Espace Science Interactive de l’IFRJ1 - un musée des sciences situé dans une région périphérique de Rio de Janeiro, et démontre qu’une exposition scientifique peut contribuer à l’insertion d’enseignants dans ces espaces d’éducation non formelle ainsi qu’à leur formation continue.En virtud

  2. Inventories of atmospheric pollutants emissions in France under the convention framework on the long range transboundary air pollution; Inventaire des emissions de polluants atmospheriques en France au titre de la convention sur la pollution atmospherique tranfrontaliere a longue distance

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-12-01

    The present report supplies emission data, for France, concerning all the substances covered by the different protocols adopted under the Convention on Long Range Transboundary Air Pollution (LRTAP), on behalf of the United Nations Economic Commission for Europe (UNECE). The substances covered are sulphur dioxide (SO{sub 2}), nitrogen oxides (NO{sub x}), non methane volatile organic compounds (NMVOCs), ammonia (NH{sub 3}), carbon monoxide (CO), total suspended particles (TSP), fine particles (PM{sub 10} and PM{sub 2,5}), heavy metals (As, Cd, Cr, Cu, Hg, Ni, Pb, Se, Zn) and persistent organic pollutants (POPs). Data are reported according to new specifications adopted in Autumn 2001 regarding substances and source coverage. Parties to the convention have to report annually emissions of these substances. (author)

  3. Contribution to the modeling of atmospheric pollution in cities; Contribution a la modelisation de la pollution atmospherique dans les villes

    Energy Technology Data Exchange (ETDEWEB)

    Glockmer, St.

    2000-07-01

    Pollution generated by urban traffic and by industry at its periphery is a serious problem of our cities. Once emitted in the atmosphere, pollutants undergo two types of constraints: on one side they react chemically one with another and, on the other side, they are transported by the wind. We have chosen to work on the dynamical, thermal and chemical aspects of the pollution at different scales of the phenomena: local scale (around a group of buildings) and meso-scale (a whole city). Our ambition is not to realize a complete model but to advance step by step on each aspect. We have contributed to the realization of a numerical tool that will be completed and used for concrete pollution episodes. The first chapter is a description of the atmospheric boundary layer. Chapters two and three present models and results of numerical simulations. We stress on k-{epsilon}, RNG and v{sup 2}-f turbulence models, radiative heat transfer models and dynamical and thermal wall laws that allow to take in consideration surface roughness. The last chapter is dedicated to atmospheric chemistry. We have moreover developed a general solver of any number of transport equations coupled by a stiff chemistry and simplified ozone kinetics. (author)

  4. Inauguration of the ANDRA atmospheric station in Houdelaincourt; Inauguration de la station atmospherique de l'Andra a Houdelaincourt

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2011-07-01

    This document briefly presents the atmospheric monitoring station inaugurated in Houdelaincourt (Meuse) and installed by the ANDRA within the frame of the ICOS (Integrated Carbon Observing System) European infrastructure project which aims at developing air and greenhouse gas monitoring over Europe. It also recalls that this station is part of a set of means of monitoring, experimentation and protection of the environment within the frame of high and medium level nuclear waste storage project in Meuse and Haute-Marne. The document also proposes brief presentations of the different actors involved in the creation of this station: the LSCE (laboratory of sciences of climate and environment), Meteo-France, Air Lorraine, the IRSN, and the LGGE (laboratory of glaciology and geophysics of the environment)

  5. Aviation and the atmospheric environment. Present regulations; L`aviation et l`environnement atmospherique la reglementation actuelle

    Energy Technology Data Exchange (ETDEWEB)

    Dimitrov, Ch [Direction Generale de l` Aviation Civile (France)

    1994-12-31

    The two main environmental impacts of air transport are caused by noise and emissions. The International Civil Aviation Organization (ICAO) decided to address environmental issues in the early seventies and started establishing an action programme regarding the environment. Emissions standards were adopted in 1981 and introduced in ICAO Annex 16 as Volume II. Contracting States are required to include ICAO standards in their national regulations or to notify any differences. VOLUME II contains standards relating to the control of fuel venting, smoke and gaseous emissions (namely hydrocarbons, carbon monoxide and nitrogen oxides) from turbo-jet and turbofan engines intended for subsonic and supersonic propulsion. The stringency of NO{sub x} emissions limits was increased as from 1993. An ICAO Council committee, known as the Committee on Aviation Environmental Protection (CAEP), is in charge of proposing amendments to Annex 16. One of its working groups is assessing the need to modify current Volume II provisions and studying possible evolution of emissions standards. As a result of its work programme, it will submit several proposals for amendments of Annex 16 - Volume II at the next Committee meeting scheduled in late 1995 or early 1996. (author)

  6. Infrared remote sensing of atmospheric aerosols; Apports du sondage infrarouge a l'etude des aerosols atmospheriques

    Energy Technology Data Exchange (ETDEWEB)

    Pierangelo, C.

    2005-09-15

    The 2001 report from the Intergovernmental Panel on Climate Change emphasized the very low level of understanding of atmospheric aerosol effects on climate. These particles originate either from natural sources (dust, volcanic aerosols...) or from anthropogenic sources (sulfates, soot...). They are one of the main sources of uncertainty on climate change, partly because they show a very high spatio-temporal variability. Observation from space, being global and quasi-continuous, is therefore a first importance tool for aerosol studies. Remote sensing in the visible domain has been widely used to obtain a better characterization of these particles and their effect on solar radiation. On the opposite, remote sensing of aerosols in the infrared domain still remains marginal. Yet, not only the knowledge of the effect of aerosols on terrestrial radiation is needed for the evaluation of their total radiative forcing, but also infrared remote sensing provides a way to retrieve other aerosol characteristics (observations are possible at night and day, over land and sea). In this PhD dissertation, we show that aerosol optical depth, altitude and size can be retrieved from infrared sounder observations. We first study the sensitivity of aerosol optical properties to their micro-physical properties, we then develop a radiative transfer code for scattering medium adapted to the very high spectral resolution of the new generation sounder NASA-Aqua/AIRS, and we finally focus on the inverse problem. The applications shown here deal with Pinatubo stratospheric volcanic aerosol, observed with NOAA/HIRS, and with the building of an 8 year climatology of dust over sea and land from this sounder. Finally, from AIRS observations, we retrieve the optical depth at 10 {mu}m, the average altitude and the coarse mode effective radius of mineral dust over sea. (author)

  7. Modelling and numerical simulation of the General Dynamic Equation of aerosols; Modelisation et simulation des aerosols atmospheriques

    Energy Technology Data Exchange (ETDEWEB)

    Debry, E.

    2005-01-15

    Chemical-transport models are now able to describe in a realistic way gaseous pollutants behavior in the atmosphere. Nevertheless atmospheric pollution also exists as fine suspended particles, called aerosols, which interact with gaseous phase, solar radiation, and have their own dynamic behavior. The goal of this thesis is the modelling and numerical simulation of the General Dynamic Equation of aerosols (GDE). Part I deals with some theoretical aspects of aerosol modelling. Part II is dedicated to the building of one size resolved aerosol model (SIREAM). In part III we perform the reduction of this model in order to use it in dispersion models as POLAIR3D. Several modelling issues are still opened: organic aerosol matter, externally mixed aerosols, coupling with turbulent mixing, and nano-particles. (author)

  8. Infrared remote sensing of atmospheric aerosols; Apports du sondage infrarouge a l'etude des aerosols atmospheriques

    Energy Technology Data Exchange (ETDEWEB)

    Pierangelo, C

    2005-09-15

    The 2001 report from the Intergovernmental Panel on Climate Change emphasized the very low level of understanding of atmospheric aerosol effects on climate. These particles originate either from natural sources (dust, volcanic aerosols...) or from anthropogenic sources (sulfates, soot...). They are one of the main sources of uncertainty on climate change, partly because they show a very high spatio-temporal variability. Observation from space, being global and quasi-continuous, is therefore a first importance tool for aerosol studies. Remote sensing in the visible domain has been widely used to obtain a better characterization of these particles and their effect on solar radiation. On the opposite, remote sensing of aerosols in the infrared domain still remains marginal. Yet, not only the knowledge of the effect of aerosols on terrestrial radiation is needed for the evaluation of their total radiative forcing, but also infrared remote sensing provides a way to retrieve other aerosol characteristics (observations are possible at night and day, over land and sea). In this PhD dissertation, we show that aerosol optical depth, altitude and size can be retrieved from infrared sounder observations. We first study the sensitivity of aerosol optical properties to their micro-physical properties, we then develop a radiative transfer code for scattering medium adapted to the very high spectral resolution of the new generation sounder NASA-Aqua/AIRS, and we finally focus on the inverse problem. The applications shown here deal with Pinatubo stratospheric volcanic aerosol, observed with NOAA/HIRS, and with the building of an 8 year climatology of dust over sea and land from this sounder. Finally, from AIRS observations, we retrieve the optical depth at 10 {mu}m, the average altitude and the coarse mode effective radius of mineral dust over sea. (author)

  9. Dioxin body burden of persons living near incinerators and sintering plants: results from Belgium; Evaluation de la charge corporelle en dioxines des riverains d'incinerateurs et de la siderurgie: resultats d'une etude realisee en Belgique

    Energy Technology Data Exchange (ETDEWEB)

    Fierens, S.; Bernard, A. [Universite Catholique de Louvain (UCL), Unite de Toxicologie Industrielle et de Medecine du Travail, Faculte de Medecine, Louvain-la-Neuve (Belgium); Focant, J.F.; Eppe, G.; Pauw, E. de [Liege Univ., Lab. de Spectrometrie de Masse (CART) (Belgium)

    2005-01-15

    The aim of this study was to evaluate the impact on local residents' exposure to dioxines and coplanar PCBs (polychlorinated biphenyls) of two municipal solid waste incinerators (MSWI), one in an industrial area and the other in a rural zone, and two sintering plants, all located in Wallonia (Belgium). In all, 142 volunteers subjects living around these facilities and 63 volunteer referents from an unpolluted rural area were recruited and compared. They completed a self-administered questionnaire that furnished information about dietary habits, smoking habits, anthropometric characteristics, residential history and health status. They also provided blood samples under fasting conditions so that the body burden of dioxines (17 PCDD/Fs congeners) and coplanar PCBs could be assessed. After adjustment for co-variates determined by multiple linear regression analysis, serum concentrations of dioxines and coplanar PCBs in subjects living in the vicinity of the MSWI in the industrial area and of the sintering plants were similar to those of referents. In contrast, subjects living in the vicinity of the rural MSWI had significantly higher serum levels of dioxines (geometric mean, 38 vs 24 pg TEQ/g fat, p{<=}0.0001) and coplanar PCBs (geometric mean, 10.8 vs 7.0 pg TEQ/g fat, p{<=}0.05). Age-adjusted dioxin levels in referents did not vary with local animal fat consumption, but dioxin concentrations in subjects living around the MSWIs correlated positively with their intake of local animal fat, with levels almost doubled in subjects with the highest intake. These results show that the dioxines and coplanar PCBs emitted by MSWIs can indeed accumulate in the body of residents who consume animal products of local origin. (authors)

  10. Dosimetric comparative study of two methods of intensity modulation performed on the same accelerator; Etude comparative dosimetrique de deux methodes de modulation d'intensite realisees sur le meme accelerateur

    Energy Technology Data Exchange (ETDEWEB)

    Marchesi, V.; Aletti, P.; Madelis, G. [Centre Alexis-Vautrin, Unite de Radiophysique, CRLCC, 54 - Vandoeuvre-les-Nancy (France); Marchal, C.; Bey, P. [Centre Alexis-Vautrin, Service de Radiotherapie, CRLCC, 54 - Vandoeuvre-les-Nancy (France); Wolf, D. [Institut National Polytechnique de Lorraine, UPRES-A 7039, 54 - Vandoeuvre-les-Nancy (France)

    2000-12-01

    Intensity modulated radiation therapy (IMRT) is an advanced method of conformal radiotherapy. It permits optimal dose distribution to the target volume while preserving surrounding normal tissues. IMRT, with a multi-leaf collimator, can be realised in two different ways: either the segmented mode, which consists of combining small elementary static field, or the dynamic mode, which consists of moving the leaves while irradiating. The purpose of this work was to study these two methods of modulation on a Varian linear accelerator equipped with a collimator consisting of 40 pairs of one centimeter-wide leaves. The measurements, obtained by using a diode array, showed that the quality of the irradiation in the dynamic mode does not depend on either the dose rate or the duration of the irradiation. In the segmented mode, weak magnitude segments are preferable, but increase the errors in the delivered dose. Comparisons of various profiles showed that the measured profiles are consistent with those programmed. Both modes seem to be equivalent for step shaped profiles. In the case of profiles with constant slope, the segmentation generated by the segmented method deteriorates the profile. Even though the choice of technique is strongly dependent on the material available, the dynamic mode presents greater flexibility of use and has been chosen in our institution for IMRT. (authors)

  11. Alecto - results obtained with homogeneous critical experiments on plutonium 239, uranium 235 and uranium 233; Alecto - resultats des experiences critiques homogenes realisees sur le plutonium 239, l'uranium 235 et l'uranium 233

    Energy Technology Data Exchange (ETDEWEB)

    Bruna, J G; Brunet, J P; Caizegues, R; Clouet d' Orval, Ch; Kremser, J; Tellier, H; Verriere, Ph [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1965-07-01

    In this report are given the results of the homogeneous critical experiments ALECTO, made on plutonium 239, uranium 235 and uranium 233. After a brief description of the equipment, the critical masses for cylinders of diameters varying from 25 to 42 cm, are given and compared with other values (foreign results, criticality guide). With respect to the specific conditions of neutron reflection in the ALECTO experiments the minimal values of critical masses are: Pu239 M{sub c} = 910 {+-} 10 g, U235 M{sub c} = 1180 {+-} 12 g and U233 M{sub c} = 960 {+-} 10 g. Experiments relating to cross sections and constants to be used on these materials are presented. Lastly, kinetic experiments allow to compare pulsed neutron methods to fluctuation methods. [French] On presente dans ce rapport les resultats des experiences critiques homogenes ALECTO, effectuees sur le plutonium 239, l'uranium 235 et l'uranium 233. Apres avoir rappele la description des installations, on donne les masses critiques pour des cylindres de diametres variant entre 25 et 42 cm, qui sont comparees avec d'autres chiffres (resultats etrangers, guide de criticite). Dans les gammes des diametres etudies pour des cuves a fond plat reflechies lateralement, la valeur minimale des masses critiques est la suivante: Pu239 M{sub c} = 910 {+-} 10 g, U235 M{sub c} = 1180 {+-} 12 g et U233 M{sub c} 960 {+-} 10 g. Des experiences portant sur les sections efficaces et les constantes a utiliser sur ces milieux sont ensuite presentees. Enfin des experiences de cinetique permettent une comparaison entre la methode des neutrons pulses et la methode des fluctuations. (auteur)

  12. Habitat et environnement urbain au Viet-Nam: Hanoi et Hô Chi Minh ...

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

    With an annual income of approximately $200 US per capita, the Socialist Republic of Viet Nam is one of the world's poorest countries. It has been repetitively devastated by armed conflicts and frequent large-scale natural disasters for over 50 years. Viet Nam's population is estimated to approximately 70 million, 80% of ...

  13. Technical Communications in Urban Operations (Les communications techniques en operations urbaines)

    Science.gov (United States)

    2010-09-01

    SCUTI – Scuola Trasmissioni ed Informatica dell’Esercito Italiano Via dei Genieri, 287, 00143-Roma Cecchignola Email: Mario.DiStefano@selex...comms.com Lt. Fabrizio LAMBIASE SCUTI – Scuola Trasmissioni ed Informatica dell’Esercito Italiano Via dei Genieri, 287, 00143 Roma Cecchignola

  14. 127 Impact des rejets urbains et industriels sur la qualité des eaux ...

    African Journals Online (AJOL)

    PR BOKO

    scour of surfaces and underground. Keywords :aquifer, hydrochimy, rejections, pollution, El Kantara, Biskra, Algeria. 1. Introduction. La qualité des ..... A case study: Suquıa River Basin Au vue des résultats d'analyses hydrochimique, les concentrations en sulfates dépassent la norme (200-400mg/L). (Cordoba-. Argentina).

  15. Gouvernance des systèmes alimentaires urbains pour la prévention ...

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

    ... contre ces systèmes alimentaires en évolution et l'augmentation connexe des maladies ... les systèmes d'information et d'enregistrement des faits d'état civil dans les pays en ... GrowInclusive : la plateforme tant attendue est en construction.

  16. Urban Combat Advanced Training Technology (Technologie avancee d’entrainement au combat urbain)

    Science.gov (United States)

    2015-07-01

    For example, skills and drills (techniques) in an urban environment can be best trained or evaluated in a live environment, because other simulations...evidence as an AAR, and have the required skills to conduct an effective AAR. Some key 0 /C tasks are listed below. The precise tasks will be dependent...improvised “ Helpers ”, breaching material. Demo-Buildings and Showcases Detail of cut-away buildings, set-piece demonstrations and prepared rooms. STO

  17. Fonction et signe de l'arbre dans l'espace urbain de Lomé

    OpenAIRE

    Tchamie, T.T.K.; Badameli, M.K.

    1998-01-01

    Le monde végétal est inscrit naturellement dans la conscience des population africaines. Il n'est donc pas étonnant que l'arbre soit omniprésent dans les champs et les agglomérations. Cette présence de l'arbre s'explique par son importance dans la vie des hommes : rôle alimentaire aussi bien pour les hommes que pour les animaux, rôle réligieux, rôle écologique, rôle énergétique...

  18. La criminalité et la pauvreté au Ghana urbain | IDRC - International ...

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

    13 déc. 2016 ... La manière dont la criminalité et la pauvreté interagissent a été étudiée et débattue dans la littérature de recherche occidentale, mais on sait peu de choses sur ces dynamiques en Afrique. Dans une série de sept articles, ce numéro spécial de 2016 du Journal de la géographie du Ghana contribue à ...

  19. Agriculture urbaine : Rosario, en Argentine, récolte les fruits de ses ...

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

    7 oct. 2010 ... Greening South America, one business at a time. Brand-name billion-dollar multinationals tend to get the lion's share of attention when the topic of environmentally-friendly industry comes up. View moreGreening South America, one business at a time ...

  20. L'écosanté porte fruit – La santé en milieu urbain

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

    constaté qu'en général, les gens comprenaient les pratiques d'hygiène mais ne les appliquaient pas toujours. Ainsi, l'eau propre puisée au puits devenait contaminée avant d'arriver au foyer. Le stockage de l'eau dans des conteneurs ouverts, une pratique courante, favorisait aussi la reproduction des parasites intestinaux ...

  1. Rôles traditionnels, vulnérabilité et violence en milieu urbain au ...

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

    liée au foyer ou à la sphère domestique. Les besoins économiques, les ambitions en matière d'éducation et les téléphones mobiles et autres technologies contribuent à éroder les rôles « traditionnels » des hommes et des femmes. toutefois, de nombreuses habitudes et attentes coutumières continuent de façonner les ...

  2. Habitat et environnement urbain au Viet-Nam : Hanoi et Hô Chi ...

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

    Carrières · Communiquez avec nous · Plan du site. Abonnez-vous à notre bulletin pour recevoir les nouvelles du CRDI chaque mois. Abonnez-vous · Droits d'auteur · Éthique de la recherche · Politique de libre accès · Politique de confidentialité · Transparence · Utilisation du site Web. Suivez-nous; Facebook · Twitter ...

  3. L'agriculture urbaine ou cultiver des aliments en ville | CRDI - Centre ...

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

    25 janv. 2012 ... Des efforts qui ont porté leurs fruits ... son rayonnement et à établir des alliances ont vu le jour, et elles ont bientôt porté leurs fruits. ... a aidé la capitale du Ghana, Accra, à résoudre deux problèmes distincts : la pollution de.

  4. Développement durable de l'agriculture urbaine en Afrique ...

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

    Urban agriculture, which draws on the resources of the city and in turn supplies its markets, ... Truck gardening and livestock raising, the two most common forms of urban agriculture, are ... IDRC at the ICLEI Resilient Cities 2018 conference.

  5. Dispositifs filmiques et paysage urbain : la transformation ordinaire des lieux à travers le film

    OpenAIRE

    Brayer, Laure

    2014-01-01

    Starting from a consideration of the landscape, as it is configured daily by individual and collective practices which are supported by the landscape and from which the landscape is being shaped, this PhD thesis in architecture focuses on the ordinary transformation of places and questions the ways through which we can understand it in order to think out the becoming of these places. How can we take into account the dynamic of the ambiance in order to think about the design of a place? In tha...

  6. Nature et acteurs de la violence urbaine en République ...

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

    ... de la violence, les formes et modes d'action par lesquels les villes congolaises, ... de l'Institut d'étude du développement international de l'Université McGill ... des données probantes sur l'autonomisation des femmes sur le marché du travail. ... Droits d'auteur · Éthique de la recherche · Politique de libre accès · Politique ...

  7. Développement durable de l'agriculture urbaine en Afrique ...

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

    Les pays en développement vont connaître dans les années à venir une explosion démographique, qui sera particulièrement sensible dans les villes. La production alimentaire devra doubler dans les trente prochaines années et, parallèlement, la production de déchets et d'effluents sera multipliée par quatre. L'agriculture ...

  8. Une forme urbaine du premier âge touristique: les promenades littorales

    Directory of Open Access Journals (Sweden)

    Franck DEBIÉ

    1993-03-01

    Full Text Available Les promenades maritimes caractérisent les stations de bord de mer du premier âge touristique (1850-1930. Elles traduisent dans le paysage un urbanisme spéculatif, à rapprocher de celui qui produit le square et le boulevard, et donnent lieu à une urbanisation du littoral sous forme de vastes appendices linéaires. Les pratiques sociales associées à la promenade rappellent celles du jardin de plaisir, et renvoient au même rêve d’une urbanité idéale, libérée des miasmes, des promiscuités sociales, des contraintes qui pèsent sur les amours et les jeux.

  9. Au-delà du plan. La topologie urbaine des livreurs

    Directory of Open Access Journals (Sweden)

    Céline Cholez

    2011-03-01

    Full Text Available Nombreuses sont les activités professionnelles au sein desquelles s’orchestrent des « défis » classant les professionnels en fonction de leur degré d’expertise. Parmi les livreurs, une joute fréquente consiste à soumettre à un collègue un nom et un numéro de rue au hasard pour qu’il indique le plus rapidement possible le plus court chemin pour y parvenir. Ces jeux professionnels révèlent un aspect essentiel de l’engagement dans l’activité de travail : l’ancrage dans un espace approprié comme territoire, le secteur de tournée. Les livreurs maîtrisent en effet leurs tâches grâce à leur connaissance des zones géographiques qu’ils sillonnent quotidiennement.

  10. Commerce électronique et localisation urbaine des activités commerciales

    OpenAIRE

    Alain Rallet

    2001-01-01

    The aim of the article is to study the impact of electronic commerce on the urban organization of commercial activities. Despite of the weak level of the present development of e-commerce, significant transformations are expected. Generally confined to on line sales, electronic commerce is here defined more widely as the process of partial digitalization of commercial functions. Any business activity can be analyzed as a hybrid set of physical infrastructures and virtual functions. This hybri...

  11. Initiative Villes ciblées : gestion des déchets urbains à Cochabamba ...

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

    La ville de Cochabamba produit chaque jour 400 tonnes de déchets solides qui sont transportées au dépotoir de K'ara K'ara, situé à 10 km de la ville. Les services de gestion des déchets solides de Cochabamba sont inefficaces; les conditions d'exploitation du dépotoir entraînent une contamination de l'eau souterraine, ...

  12. Recherche sur l'environnement alimentaire urbain obésogène, ses ...

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

    L'étude, menée par une équipe pluridisciplinaire, est conçue selon une approche à différentes méthodes, y compris des enquêtes, des entrevues et l'analyse de politiques. L'University of the Western Cape (UWC) dirigera le projet en Afrique du Sud, et la Kwame Nkrumah University of Science and Technology (KNUST) ...

  13. Approches de l'utilisation des eaux usées urbaines dans l ...

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

    8 févr. 2011 ... Ils proposent une classification des différents types d'eaux usées (directes, indirectes, traitées, non traitées, dirigées et non dirigées), soulignent combien il est nécessaire d'utiliser une approche fondée sur les moyens de subsistance et ciblée sur les agriculteurs, insistent sur des directives pragmatiques ...

  14. Cités horticoles en sursis ? L'agriculture urbaine dans les grandes ...

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

    A multidisciplinary team of researchers and technicians conducted an in-depth study of the production systems, land tenure problems, interactions between ... Sénégal is highly populated, densely cultivated and facing a crisis that is both economic (characterized by low productivity, poverty, food insecurity) and ecological .

  15. Méditerranée asiatique : un modèle urbain polycentrique

    OpenAIRE

    Gipouloux , François

    2012-01-01

    Publication de la revue "Diplomatie. Affaires stratégiques et relations internationales" http://www.diplomatie-presse.com/; International audience; En Asie orientale, un corridor maritime a pris forme autour de plates-formes logistiques et portuaires, fidèles au modèle de Hong Kong. C'est là que bat le coeur de l'économie régionale.

  16. Pratiques urbaines et imbroglio spatial : Brazzaville de la fin de la ...

    African Journals Online (AJOL)

    chifaou.amzat

    2 août 2011 ... Dans la rhétorique marxiste, le concept « populaire » est très caractéristique. ... En marge de la Constitution de 1969, la loi N° 52/83 du 21 avril 1983 .... mairie et d'autres secteurs administratifs congolais dans la vulgarisation.

  17. rendre les villes urbaines sûres et inclusives au Venezuela

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

    ont étudié ces institutions et leur lien avec le taux de criminalité et la cohésion sociale dans quatre villes : Caracas, Ciudad Guayana, San Cristóbal et San Antonio del Táchira. Leur objectif était de trouver des solutions favorisant la sécurité et l'inclusivité dans ces villes. Histoire à succès | Villes sûres et inclusiVes. FLiC kr.

  18. Peur, criminalité et cohésion sociale en milieu urbain en Afrique du ...

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

    13 déc. 2016 ... La « cohésion sociale » fait largement référence aux facteurs qui maintiennent une société ensemble, y compris les valeurs et l'identité partagées, les sentiments d'appartenance, la participation civique et la légitimité politique. Une théorie fondée sur l'expérience des communautés des pays à revenu ...

  19. Criminalité et violence dans les zones urbaines d'Amérique latine ...

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

    Le projet examinera la dynamique de la criminalité, de la violence et du trafic de ... Brazil, South America, Colombia, Mexico, North and Central America ... Special journal issue highlights IDRC-supported findings on women's paid work.

  20. L EVENEMENT URBAIN FESTIF: VERS UNE GESTION DE SITE EXPLORATOIRE SUR L ESPACE PUBLIC

    OpenAIRE

    MIRANDA, MONICA; MIRANDA, MONICA

    2010-01-01

    “Festive urban events” (EUF) stand out not only as new social practices, but also as urban actions providing a basis for urban research. Compared to "traditional" urban actions and current methods of public space management, “Festive urban events” in public spaces follow different dynamics; they are ephemeral, cyclic, and immaterial. This research examines the management implications of “Festive urban events” and attempts to determine if these events‟ dynamics can unlock new perspectives f...

  1. 73 Utilisation du SIG pour une réorganisation urbaine du centre-ville ...

    African Journals Online (AJOL)

    TOHOZIN

    restructuration des routes, du chemin de fer, des bâtis et des cours d'eaux. ... aussi la réalisation d'une mappe foncière qui est un instrument capital en matière ..... confirmer que le SIG, en tant qu'outil de décision et de planification a ...

  2. Impacts des éclairages urbains sur les pétrels de Barau, Pterodroma ...

    African Journals Online (AJOL)

    Young birds on fledging are attracted by the lights, and fall to the ground where they risk being killed. Rescue operations have mobilised the local population, and between 1995 and 2004, 3 762 Barau's Petrels were retrieved. The main stranding sites were identified. The most attractive structures were the illuminated road ...

  3. La criminalité et la pauvreté au Ghana urbain | CRDI - Centre de ...

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

    13 déc. 2016 ... Evidence from Urban Ghana » (PDF en anglais, 151 Ko) par George Owusu, Martin Oteng-Ababio, Adobea Y. Owusu et Charlotte Wrigley-Asante; « Poverty and Crime: Uncovering the Hidden Face of Sexual Crimes in Urban Low-income Communities in Ghana » (PDF en anglais, 373 Ko) par Charlotte ...

  4. Le savoir offre aux jeunes des milieux urbains d'autres possibilités ...

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

    8 août 2016 ... Un examen approfondi de la violence juvénile permet de dégager diverses solutions pour prévenir la criminalité, notamment des ressources de soutien en santé mentale, le renforcement de la confiance au sein de la collectivité, le maintien des jeunes à l'école et la création de possibilités d'emploi.

  5. Perceptions de l'errance des malades mentaux en zone urbaine au ...

    African Journals Online (AJOL)

    A la lumière de nos résultats, trois principaux types de facteurs ont été notés et pourraient expliquer cette situation : la pauvreté économique, l'absence de dispositif public de prise en charge des malades mentaux errants et la tolérance culturelle à la présence des malades mentaux errants non violents. Mots-clés : Errance ...

  6. De la construction en brique massive. Le cas du logement urbain à Winterthur (ZH)

    OpenAIRE

    Hinden, Reto

    2007-01-01

    La brique est un matériau dont on sous-estime le potentiel et qui est d'ailleurs souvent mis en œuvre sans que toutes ses qualités soient exploitées. Solide, avec des grandes qualités formelles, disponible presque partout, la brique est un matériau local qui mérite qu'on s'en occupe. La brique, l'élément de base des principes constructifs qui existent depuis des millénaires, est devenue un matériau caché (sous l'isolation) et un matériau de revêtement quelconque. Ce travail s'interroge sur la...

  7. Rompre le cycle de la pauvreté urbaine | CRDI - Centre de ...

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

    13 déc. 2010 ... De même, à Jakarta, un programme de conversion des sédiments des caniveaux en briques a permis de transformer un risque pour la santé publique en une ressource qui joue un rôle social tout en produisant un revenu pour la collectivité. David, un récupérateur de déchets de Cochabamba, est venu ...

  8. Consequences of urban pollution on health; Consequences de la pollution urbaine sur la sante

    Energy Technology Data Exchange (ETDEWEB)

    Adedeji, A. [Agence pour la Protection de l' Environnement de l' Etat de Lagos, Lagos State Environmental Protection Agency - Lasepa (Nigeria)

    2002-11-01

    This article treats of the urbanization process in Africa and of the direct impact of urban pollution on people's health. After a description of the spectacular growth of urban populations in Africa since 1970, the author focusses on the experience of Nigeria and on the city of Lagos: urbanization causes, demographic growth, origins of urban pollution (road traffic, uncontrolled wastes tipping, sanitary conditions) and different types of pollution (atmospheric, hydric, domestic wastes, noise, heat..). The second part of the article deals with the impact of this urban pollution on the public health in conditions of overpopulation: domestic environment, diseases linked with water quality, diseases transmission, accidents, occupational diseases. This analysis stresses on the lack of urban management and development policies in Nigeria, and on the lack of a representative, liable and competent public authority. (J.S.)

  9. Améliorer le rendement des zones urbaines dans le contexte du ...

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

    Journal supplement features 10 years of West African health systems research. In the wake of the devastating Ebola virus outbreak in 2014, increased attention has been paid to West Africa's poorly functioning health systems. View moreJournal supplement features 10 years of West African health systems research.

  10. La cohésion sociale : une solution ou un moteur de violence urbaine ?

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

    Interventions de l'État dans les ... dirigées par le Human Sciences Research Council (HSRC) de l'Afrique du Sud et le Laboratory ... d'intervention visant à réduire la violence : ... Commission of Inquiry into police killings, à la Public Security.

  11. La portée des projets urbains récents pour la grande ville ...

    African Journals Online (AJOL)

    Utilisateur

    Département d'Aménagement du Territoire, Faculté des Sciences de la Terre. Université Badji Mokhtar- Annaba ...... électrique, eau). - Entreprises .... qui relayaient les sphères centrales de la décision et les instances loca- les, ce qui rendra ...

  12. Estimation relative de la vulnérabilité urbaine à Bucarest

    Directory of Open Access Journals (Sweden)

    Samuel Rufat

    2009-11-01

    Full Text Available À Bucarest, les cartes murales sont les principaux outils des urbanistes et des gestionnaires du risque. La réalisation d’un SIG et l’intégration de différentes bases de données permettent d’améliorer l’analyse spatiale et de déplacer les préoccupations des gestionnaires des aléas à la vulnérabilité. Nous proposons une solution basée sur l’analyse multivariée pour dépasser les obstacles méthodologiques à l’estimation de la vulnérabilité. Les différents profils de vulnérabilité sont cartographiés au regard des aléas et sources de danger pour réaliser une carte synthétique du risque. Cette spectroscopie de la vulnérabilité est développée dans le cas de Bucarest comme outil de gestion du risque et d’aide à la décision.

  13. La « nouvelle modernité » urbaine.

    Directory of Open Access Journals (Sweden)

    Alexis Salanson

    2003-01-01

    Full Text Available Président du conseil scientifique de l'Institut « Pour la ville en mouvement » et professeur à l'Institut français d'urbanisme (Paris 8, François Ascher résume dans cet ouvrage les thèses qu'il a défendues tout au long de ses précédentes publications 1  : la société dans laquelle nous vivons s'éloigne irrémédiablement de ce qu'elle fut pendant la révolution industrielle pour basculer dans une « nouvelle modernité ». Celle-ci conduit à repenser ...

  14. L´avenir urbain de la démocratie européenne.

    Directory of Open Access Journals (Sweden)

    Xavier Carpentier-Tanguy

    2007-11-01

    Full Text Available Vue de l’étranger, du Japon ou des Etats-Unis, l’Europe constitue déjà un ensemble cohérent ; pour certains auteurs, tels que Jeremy Rifkins, l´Europe constitue même un modèle à suivre ― selon l´idée qu´il développe à travers son livre The European dream (how Europe´s vision of Futur is quietly eclipsing the american dream . Pourtant, les refus hollandais et français de ratification du traité Constitutionnel à l´occasion de référendums nationaux, les récentes et ...

  15. L'agriculture urbaine atteint de nouveaux sommets sur les terrasses ...

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

    8 févr. 2011 ... La plupart des systèmes hydroponiques sont formés de milieux de culture ou de « modules de croissance » remplis d'un « substrat » inerte ou d'un support de culture comme la vermiculite ou la sciure de bois, lesquels remplacent le terreau pour retenir les racines des plantes et l'humidité. Les racines sont ...

  16. Utilisation du SIG pour une réorganisation urbaine du centre-ville de ...

    African Journals Online (AJOL)

    Like in the majority of African cities, Mbalmayo town in Cameroun moved in an anarchistic way. One notes the birth of unorganized quarters which especially moved into vulnerable zones (swampy and easily flooded). The issue of this study is to contribute to the management of the town by suggesting the reorganization of ...

  17. La santé en milieu urbain | CRDI - Centre de recherches pour le ...

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

    13 déc. 2010 ... Les villes attirent des millions de personnes en quête d'une vie meilleure. ... possibilités, mais exposent aussi les habitants à de nouveaux dangers. .... ÉTUDE DE CAS — Népal : Améliorer l'hygiène et la santé à Katmandou.

  18. District cool water distribution; Reseau urbain et distribution d`eau glacee

    Energy Technology Data Exchange (ETDEWEB)

    Schabaillie, D. [Ste Climespace (France)

    1997-12-31

    The city of Paris has developed several district cool water distribution networks (Climespace) for air conditioning purposes, one in the Halles district (central Paris) linked with the Louvre museum, one in the Opera district (with large department stores) and one in the east of paris (Bercy). Each of these networks has a cool water production plant, the one at the Halles producing also hot water and safety electric power. The characteristics of the equipment (heat pumps, refrigerating machinery, storage...) are described. The pipes are laid in the city sewage network, and the cool carrier is water. The various networks are centrally supervised at the Halles center

  19. Agriculture urbaine : Rosario, en Argentine, récolte les fruits de ses ...

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

    7 oct. 2010 ... C'est en cultivant leur propre potager que des milliers de familles de la ville de Rosario, en Argentine, sont parvenues à se nourrir tout au long de la crise économique qui a récemment frappé leur pays. La ville compte aujourd'hui plus de 800 jardins communautaires qui, en plus de nourrir quelque 40 000 ...

  20. Community Cleaning Services : une alliance hybride pour l'assainissement urbain

    OpenAIRE

    Thieme, Tatiana; DeKoszmovszky, Justin

    2012-01-01

    Cet article vise à analyser les trois phases de développement de l’initiative Community Cleaning Service, soutenu par SC Johnson dans les bidonvilles de Nairorib. Après le lancement du BoP Protocol, puis le développement d’un système de micro-franchise, CCS est devenue une entreprise sociale à but non lucratif. On observe dans ces trois phases les relations complexes qui se tissent, ausi bien pour l’entreprise que pour les micro-franchisés, entre aide et marché.

  1. Community Cleaning Services : une alliance hybride pour l'assainissement urbain

    Directory of Open Access Journals (Sweden)

    Tatiana Thieme

    2012-01-01

    Full Text Available Cet article vise à analyser les trois phases de développement de l’initiative Community Cleaning Service, soutenu par SC Johnson dans les bidonvilles de Nairorib. Après le lancement du BoP Protocol, puis le développement d’un système de micro-franchise, CCS est devenue une entreprise sociale à but non lucratif. On observe dans ces trois phases les relations complexes qui se tissent, ausi bien pour l’entreprise que pour les micro-franchisés, entre aide et marché.

  2. 3D Modelling of Urban Terrain (Modelisation 3D de milieu urbain)

    Science.gov (United States)

    2011-09-01

    Biblioteka Wojskowa 1000 Ljubljana NASA Center for AeroSpace Information (CASI) ul. Ostrobramska 109 7115 Standard Drive 04-041 Warszawa TURQUIE Hanover...29, Avenue de la Division Leclerc ul. Ostrobramska 109 Porton Down BP 72, 92322 Châtillon Cedex 04-041 Warszawa Salisbury SP4 0JQ GERMANY

  3. Interação museu-escola : a importância dos programas de formação continuada de professores em municípios afastados dos centros urbanos Museum-school interactions: the importance of continuing education programs for teachers in municipalities away from urban centres Interaction musée-école : l’importance des programmes de formation continue des enseignants dans les municipalités éloignées des centres urbains Interacción museo-escuela : la importancia de los programas de formación continua de profesores en localidades alejadas de los centros urbanos

    Directory of Open Access Journals (Sweden)

    Grazielle Rodrigues Pereira

    2011-09-01

    Full Text Available Due to a series of misconceptions about science, science centers and science museums have proposed projects to break the paradigm of science education focused on a small portion of the population. These centers and museums have developed strategies aimed at social inclusion in terms of their educational character, thereby investing in strategies to upgrade vocational education, among other actions. However, most of these areas are concentrated in large urban areas, preventing the participation of the poorest sectors of society. Thus, this study shows a report of a pilot teacher education program developed by the Espaço Ciência InterAtiva do IFRJ, a science museum located in a suburban area of Rio de Janeiro, showing that a scientific exhibition can contribute to the inclusion of teachers in these areas of informal education, and to their ongoing training.En raison d’un ensemble de conceptions erronées sur la science, les centres et les musées des sciences se proposent actuellement de rompre avec l’image de la science réservée à une petite partie de la population. Ces espaces développent des activités qui, par leur caractère éducatif, favorisent l’intégration sociale, et investissent de cette façon, entre autres actions, dans des stratégies de mise à niveau des professionnels de l’éducation. Toutefois, la plupart de ces espaces se concentrent dans les grands centres urbains, ce qui rend la participation des couches moins favorisées de la société bien plus difficile. Ainsi, ce travail porte sur l’exposé d’un programme pilote de formation continue des enseignants, développé par l’Espaço Ciência InterAtiva (Espace Science Interactive de l’IFRJ1 - un musée des sciences situé dans une région périphérique de Rio de Janeiro, et démontre qu’une exposition scientifique peut contribuer à l’insertion d’enseignants dans ces espaces d’éducation non formelle ainsi qu’à leur formation continue.En virtud

  4. Développement urbain fractal sous contraintes d'accessibilités - Modèles et outils d'aide à la décision pour l'aménagement urbain

    OpenAIRE

    Frankhauser , Pierre; Tannier , Cécile; Houot , Hélène; Vuidel , Gilles

    2010-01-01

    77; Ce projet fait suite à une recherche financée par le PREDIT intitulée " Vers des déplacements périurbains plus durables - Proposition de modèles fractals opérationnels d'urbanisation " (Dir. P. Frankhauser - Participants : H. Houot, C. Tannier et G. Vuidel)1. Ce premier projet, réalisé entre juillet 2005 et juin 2007, a posé les bases du présent projet, à savoir la définition de ses fondements conceptuels et de ses principes méthodologiques. Le présent projet a pour but de compléter la mé...

  5. Dissolution process of atmospheric aerosol particles into cloud droplets; Processus de dissolution des aerosols atmospheriques au sein des gouttes d'eau nuageuses

    Energy Technology Data Exchange (ETDEWEB)

    Desboeufs, K

    2001-01-15

    Clouds affect both climate via the role they play in the Earth's radiation balance and tropospheric chemistry since they are efficient reaction media for chemical transformation of soluble species. Cloud droplets are formed in the atmosphere by condensation of water vapour onto aerosol particles, the cloud condensation nuclei (CCN). The water soluble fraction of these CCN governs the cloud micro-physics, which is the paramount factor playing on the radiative properties of clouds. Moreover, this soluble fraction is the source of species imply in the oxidation/reduction reactions in the aqueous phase. Thus, it is of particular importance to understand the process controlling the solubilization of aerosols in the cloud droplets. The main purpose of this work is to investigate experimentally and theoretically the dissolution of particles incorporated in the aqueous phase. From the studies conducted up to now, we have identify several factors playing on the dissolution reaction of aerosols. However, the quantification of the effects of these factors is difficult since the current means of study are not adapted to the complexity of cloud systems. First, this work consisted to perform a experimental system, compound by an open flow reactor, enabling to follow the kinetic of dissolution in conditions representative of cloud. This experimental device is used to a systematic characterisation of the known factors playing on the dissolution, i.e. pH, aerosol nature, aerosol weathering... and also for the identification and the quantification of the effects of other factors: ionic strength, acid nature, clouds processes. These experiments gave quantitative results, which are used to elaborate a simple model of aerosol dissolution in the aqueous phase. This model considers the main factors playing on the dissolution and results in a general mechanism of aerosol dissolution extrapolated to the cloud droplets. (author)

  6. Caracterisation, modelisation et validation du transfert radiatif d'atmospheres non standard; impact sur les corrections atmospheriques d'images de teledetection

    Science.gov (United States)

    Zidane, Shems

    This study is based on data acquired with an airborne multi-altitude sensor on July 2004 during a nonstandard atmospheric event in the region of Saint-Jean-sur-Richelieu, Quebec. By non-standard atmospheric event we mean an aerosol atmosphere that does not obey the typical monotonic, scale height variation employed in virtually all atmospheric correction codes. The surfaces imaged during this field campaign included a diverse variety of targets : agricultural land, water bodies, urban areas and forests. The multi-altitude approach employed in this campaign allowed us to better understand the altitude dependent influence of the atmosphere over the array of ground targets and thus to better characterize the perturbation induced by a non-standard (smoke) plume. The transformation of the apparent radiance at 3 different altitudes into apparent reflectance and the insertion of the plume optics into an atmospheric correction model permitted an atmospheric correction of the apparent reflectance at the two higher altitudes. The results showed consistency with the apparent validation reflectances derived from the lowest altitude radiances. This approach effectively confirmed the accuracy of our non-standard atmospheric correction approach. This test was particularly relevant at the highest altitude of 3.17 km : the apparent reflectances at this altitude were above most of the plume and therefore represented a good test of our ability to adequately correct for the influence of the perturbation. Standard atmospheric disturbances are obviously taken into account in most atmospheric correction models, but these are based on monotonically decreasing aerosol variations with increasing altitude. When the atmospheric radiation is affected by a plume or a local, non-standard pollution event, one must adapt the existing models to the radiative transfer constraints of the local perturbation and to the reality of the measurable parameters available for ingestion into the model. The main inputs of this study were those normally used in an atmospheric correction : apparent at-sensor radiance and the aerosol optical depth (AOD) acquired using ground-based sunphotometry. The procedure we employed made use of a standard atmospheric correction code (CAM5S, for Canadian Modified 5S, which comes from the 5S radiative transfer model in the visible and near infrared) : however, we also used other parameters and data to adapt and correctly model the special atmospheric situation which affected the multi-altitude images acquired during the St. Jean field campaign. We then developed a modeling protocol for these atmospheric perturbations where auxiliary data was employed to complement our main data-set. This allowed for the development of a robust and simple methodology adapted to this atmospheric situation. The auxiliary data, i.e. meteorological data, LIDAR profiles, various satellite images and sun photometer retrievals of the scattering phase function, were sufficient to accurately model the observed plume in terms of a unusual, vertical distribution. This distribution was transformed into an aerosol optical depth profile that replaced the standard aerosol optical depth profile employed in the CAM5S atmospheric correction model. Based on this model, a comparison between the apparent ground reflectances obtained after atmospheric corrections and validation values of R*(0) obtained from the lowest altitude data showed that the error between the two was less than 0.01 rms. This correction was shown to be a significantly better estimation of the surface reflectance than that obtained using the atmospheric correction model. Significant differences were nevertheless observed in the non-standard solution : these were mainly caused by the difficulties brought about by the acquisition conditions, significant disparities attributable to inconsistencies in the co-sampling / co-registration of different targets from three different altitudes, and possibly modeling errors and / or calibration. There is accordingly room for improvement in our approach to dealing with such conditions. The modeling and forecasting of such a disturbance is explicitly described in this document: our goal in so doing is to permit the establishment of a better protocol for the acquisition of more suitable supporting data. The originality of this study stems from a new approach for incorporating a plume structure into an operational atmospheric correction model and then demonstrating that the approach was a significant improvement over an approach that ignored the perturbations in the vertical profile while employing the correct overall AOD. The profile model we employed was simple and robust but captured sufficient plume detail to achieve significant improvements in atmospheric correction accuracy. The overall process of addressing all the problems encountered in the analysis of our aerosol perturbation helped us to build an appropriate methodology for characterizing such events based on data availability, distributed freely and accessible to the scientific community. This makes our study adaptable and exportable to other types of non-standard atmospheric events. Keywords : non-standard atmospheric perturbation, multi-altitude apparent radiances, smoke plume, Gaussian plume modelization, radiance fit, AOD, CASI

  7. Dissolution process of atmospheric aerosol particles into cloud droplets; Processus de dissolution des aerosols atmospheriques au sein des gouttes d'eau nuageuses

    Energy Technology Data Exchange (ETDEWEB)

    Desboeufs, K.

    2001-01-15

    Clouds affect both climate via the role they play in the Earth's radiation balance and tropospheric chemistry since they are efficient reaction media for chemical transformation of soluble species. Cloud droplets are formed in the atmosphere by condensation of water vapour onto aerosol particles, the cloud condensation nuclei (CCN). The water soluble fraction of these CCN governs the cloud micro-physics, which is the paramount factor playing on the radiative properties of clouds. Moreover, this soluble fraction is the source of species imply in the oxidation/reduction reactions in the aqueous phase. Thus, it is of particular importance to understand the process controlling the solubilization of aerosols in the cloud droplets. The main purpose of this work is to investigate experimentally and theoretically the dissolution of particles incorporated in the aqueous phase. From the studies conducted up to now, we have identify several factors playing on the dissolution reaction of aerosols. However, the quantification of the effects of these factors is difficult since the current means of study are not adapted to the complexity of cloud systems. First, this work consisted to perform a experimental system, compound by an open flow reactor, enabling to follow the kinetic of dissolution in conditions representative of cloud. This experimental device is used to a systematic characterisation of the known factors playing on the dissolution, i.e. pH, aerosol nature, aerosol weathering... and also for the identification and the quantification of the effects of other factors: ionic strength, acid nature, clouds processes. These experiments gave quantitative results, which are used to elaborate a simple model of aerosol dissolution in the aqueous phase. This model considers the main factors playing on the dissolution and results in a general mechanism of aerosol dissolution extrapolated to the cloud droplets. (author)

  8. Development of multivariate and multi-sensors systems for the measurement of atmospheric pollutants; Developpement de systemes multicapteurs et multivariables pour la mesure en continu de polluants atmospheriques

    Energy Technology Data Exchange (ETDEWEB)

    Kamionka, M.

    2005-04-15

    The purpose of this work was to measure the concentrations of atmospheric pollutants using sensors based on a metal semiconductor, tin dioxide. These sensors were tested with two reducing gases which are carbon monoxide (0-20 ppm), a mixture of hydrocarbons (0-10 ppm) and two oxidizing gases which is ozone (0-500 ppb) and nitrogen dioxide (0-500 ppb). One of the major disadvantages of this type of sensor is their lack of selectivity. Thus the association of several different sensors in multi-sensors system can be a solution. We have developed an automated test bench able to generate the suitable gas concentrations with a controlled humidity. It is then possible to carry out the acquisition of four devices (mono or multi-sensors) with cycles of temperature. We followed the evolution with their age of the performances of various sensors worked out by serigraphy. At the end of these experiments, we showed the interest of the use of some of these sensors for the evaluation of two major components of pollution: ozone and hydrocarbons. We could not prove that the capacitive effects and the effects of electrode were useful parameters for our application. Nevertheless, the measurement with increasing temperature give additional information. Thus, two multi-sensors systems were carried out. One associates three independent sensors and the other consists of three layers deposited on the same heating substrate. These three layers are initially identical (tin dioxide) but two are covered with a thin film, platinum for one and silica for the other. Moreover, one system made up of three commercial sensors used with a constant temperature was also tested. For each studied system, we built behavior models using a Neural Network algorithm. Whereas the models carried out using synthetic gas mixtures appeared unusable for measurements in real pollution, it was shown that a model calibrated directly with air bled in urban environment appears effective for the measurement of hydrocarbon and the ozone concentrations. The portability of these models between various identical multi-sensors was proven, but their lifespan was limited to ten days. (author)

  9. Vocabulary of acid precipitation and air pollution. Terminology bulletin 175. Vocabulaire des precipitations acides et de la pollution atmospherique. Bulletin de terminologie 175

    Energy Technology Data Exchange (ETDEWEB)

    Rivard, D

    1988-01-01

    This English-French vocabulary includes about 600 concepts on acid rain as well as general air pollution terminology. A large number of official names and their abbreviations have also been incorporated into the dictionary. The vocabulary is arranged alphabeticaly into a series of terminology files, each of which begins with a main entry in English and French. The main entry represents those terms selected as being of superior terminological quality. The main entry may be followed by sub-entries, which are synonyms, and may also be followed by a definition, an example of usage, a defining context, or a terminological observation. Sub-entries are in the same alphabetical sequence as the main entries, and refer the reader to the main entry. An index of French terms is also included. 243 refs.

  10. Detection of atmospheric tritium by scintillation. Variations in its concentration in France; Detection du tritium atmospherique par scintillation. Evolution de sa concentration en France

    Energy Technology Data Exchange (ETDEWEB)

    Bibron, R [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1964-06-01

    The tritium released into the atmosphere as a result of the explosion of thermonuclear devices is a useful radioactive tracer for the study of certain geophysical problems. The low concentrations found however call for the use of extremely sensitive detectors. Two detection methods using liquid scintillators are described. In the first method, the sample is introduced into the scintillator in liquid form, after prior concentration of the tritium by electrolysis. In the second method the tritium is incorporated into the scintillator solvent molecule by chemical synthesis. In the last part of the report are examined the variations in the tritium concentration in rain-water and of the free hydrogen in the air in France. A discussion is then made of the seasonal variations in the case of rain-water and these are compared to the variations in the strontium-90 concentrations. (author) [French] Le tritium introduit dans l'atmosphere par les explosions d'armes thermonucleaires est un traceur radioactif Interessant pour l'etude de certains problemes de geophysique. Les faibles concentrations rencontrees obligent toutefois a utiliser des detecteurs extremement sensibles. On decrit deux methodes de detection utilisant des scintillateurs liquides. Dans la premiere methode, l'echantillon est introduit dans le scintillateur, sous forme aqueuse, apres une concentration prealable du tritium par electrolyse. Dans la seconde methode, le tritium est incorpore a la molecule du solvant du scintillateur par synthese chimique. Dans la derniere partie du rapport, on examine l'evolution de la concentration du tritium dans les eaux de precipitation et l'hydrogene libre de l'air en France. On discute ensuite les variations saisonnieres dans le cas des eaux de precipitation et on les compare aux variations du strontium 90. (auteur)

  11. Modeling of atmospheric pollution at the regional scale: application to the Esquif campaign; Modelisation a l'echelle regionale de la pollution atmospherique: application a la campagne Esquif

    Energy Technology Data Exchange (ETDEWEB)

    Sarrat, C

    2003-06-01

    The Esquif experimental campaign (study and simulation of air quality in Ile-de-France (Paris region, France)) took place between 1998 and 2000 with the aim of better understanding the dynamical and chemical processes leading to atmospheric pollution peaks in Paris. The construction of a rich and diversified database (12 periods of intensive monitoring (PIM)) has been implemented with the aim of improving the existing chemical-transport models in general and air quality forecasting models in particular. In the framework of this study, the data collected during PIM 2 and 6 were used for the validation and analysis of situations of intensive pollution, simulated with the meso-scale numerical meteorological and chemical model Meso-NHC. The validation of both the dynamic fields (temperature and potential temperature, wind, height of the boundary layer) and the chemical fields (mainly O{sub 3}, NO{sub x}, NO{sub y}, PAN, isoprene) of the model allows to discuss some of the parameters of the model such as the initialization, the boundary forcing and the resolution. Then, a study of the dynamical processes allows to analyze the formation and reinforcement of the pollution conditions. Stress is put on the interaction of the regional scale processes with the photochemical pollution events. In this framework, the dynamical-chemical interaction processes are analyzed in detail, in particular when pollution levels are reinforced by the intrusion of residual ozone inside the convective boundary layer, dragged by the turbulence. Also, the impact of the urban hot island and of the urban wind on the redistribution of primary and secondary pollutants are considered. An analysis of the impact of hydrocarbons of biogenic origin on the ozone concentrations with respect to the temperature and to the presence of primary compounds has been performed for the PIM 2 and 6 of the Esquif campaign. (J.S.)

  12. Modelling atmospheric circulations for the study of Alpine valleys pollution; Modelisation des circulations atmospheriques pour l'etude de la pollution des vallees alpines

    Energy Technology Data Exchange (ETDEWEB)

    Brulfert, G

    2004-11-15

    Local weather phenomena observed in alpine valleys frequently lead to the accumulation of emitted anthropogenic airborne species in the low layers of the atmosphere. The development of a numerical model allows reproducing the chemical evolution of air mass during POVA intensive period of observations. In Chamonix and Maurienne valley, computations of photochemical indicators (NO{sub y}, O{sub 3}/NO{sub z}, H{sub 2}O{sub 2}/HNO{sub 3}) prove the ozone regime to be control by volatile organic compounds. Moreover simulation highlighted that the major part of this secondary pollutant is regionally produced. The development of an indicator who localised ozone production sites can help to define abatement scenarios. The chemical mechanism RACM allows describing the evolution of many species. It is possible to conclude that in winter road traffic and heating are the main sources of volatile organic compounds. (author)

  13. Greenhouse gases regional fluxes estimated from atmospheric measurements; Estimation des flux de gaz a effet de serre a l'echelle regionale a partir de mesures atmospheriques

    Energy Technology Data Exchange (ETDEWEB)

    Messager, C

    2007-07-15

    build up a new system to measure continuously CO{sub 2} (or CO), CH{sub 4}, N{sub 2}O and SF{sub 6} mixing ratios. It is based on a commercial gas chromatograph (Agilent 6890N) which have been modified to reach better precision. Reproducibility computed with a target gas on a 24 hours time step gives: 0.06 ppm for CO{sub 2}, 1.4 ppb for CO, 0.7 ppb for CH{sub 4}, 0.2 ppb for N{sub 2}O and 0.05 ppt for SF{sub 6}. The instrument's run is fully automated, an air sample analysis takes about 5 minutes. In July 2006, I install instrumentation on a telecommunication tall tower (200 m) situated near Orleans forest in Trainou, to monitor continuously greenhouse gases (CO{sub 2}, CH{sub 4}, N{sub 2}O, SF{sub 6}), atmospheric tracers (CO, Radon-222) and meteorological parameters. Intake lines were installed at 3 levels (50, 100 and 180 m) and allow us to sample air masses along the vertical. Continuous measurement started in January 2007. I used Mace Head (Ireland) and Gif-sur-Yvette continuous measurements to estimate major greenhouse gases emission fluxes at regional scale. To make the link between atmospheric measurements and surface fluxes, we need to quantify dilution due to atmospheric transport. I used Radon-222 as tracer (radon tracer method) and planetary boundary layer heights estimates from ECMWF model (boundary layer budget method) to parameterize atmospheric transport. In both cases I compared results to available emission inventories. (author)

  14. Effects of atmospheric neutrons on advanced micro-electronic devices, standards and applications; Effets des neutrons atmospheriques sur les dispositifs microelectroniques avances, normes et applications

    Energy Technology Data Exchange (ETDEWEB)

    Leray, J.L. [CEA, 75 - Paris (France); Baggio, J.; Ferlet-Cavrois, V.; Flament, O. [CEA Bruyeres-le-Chatel, 91 (France)

    2005-10-01

    Since the 1980's, it is known that terrestrial cosmic rays, mainly reported as atmospheric neutrons, can penetrate the natural shielding of buildings, equipments and circuit package and induce soft errors in integrated circuits and breakdown of power devices. The high-energy neutron fluxes of interest, larger than 10 MeV, range between 10 particles/cm{sup 2}/hour at sea level and 10{sup 4} particles/cm{sup 2}/hour at typical airplanes flight altitude of 30000 feet, with modulation due to solar flares. In the 1990's, the phenomenon has pervaded as a consequence of the road-map of electronic devices especially the down-scaling of transistor dimensions, the increase of signal bandwidth and the increase of the size of DRAM and SRAM memory, stand-alone or embedded on processors and system-on-chips. Failure-in-time and soft error rate became unacceptable. Test standards and design solutions have been proposed to maintain reliability of commercial products and improve those used in special high-reliability equipments such as avionic computers. The paper describes the atmospheric neutron flux, the effects in the main classes of devices and specific cases such as neutron induced single event upset observed in CMOS vs. CMOS/SOI and some mitigation issues. In this paper, a model called CCPM (critical cross-point model) is proposed to provide critical graphs of technology node sensitivity along the scaling trend of CMOS. (authors)

  15. Greenhouse gases regional fluxes estimated from atmospheric measurements; Estimation des flux de gaz a effet de serre a l'echelle regionale a partir de mesures atmospheriques

    Energy Technology Data Exchange (ETDEWEB)

    Messager, C

    2007-07-15

    build up a new system to measure continuously CO{sub 2} (or CO), CH{sub 4}, N{sub 2}O and SF{sub 6} mixing ratios. It is based on a commercial gas chromatograph (Agilent 6890N) which have been modified to reach better precision. Reproducibility computed with a target gas on a 24 hours time step gives: 0.06 ppm for CO{sub 2}, 1.4 ppb for CO, 0.7 ppb for CH{sub 4}, 0.2 ppb for N{sub 2}O and 0.05 ppt for SF{sub 6}. The instrument's run is fully automated, an air sample analysis takes about 5 minutes. In July 2006, I install instrumentation on a telecommunication tall tower (200 m) situated near Orleans forest in Trainou, to monitor continuously greenhouse gases (CO{sub 2}, CH{sub 4}, N{sub 2}O, SF{sub 6}), atmospheric tracers (CO, Radon-222) and meteorological parameters. Intake lines were installed at 3 levels (50, 100 and 180 m) and allow us to sample air masses along the vertical. Continuous measurement started in January 2007. I used Mace Head (Ireland) and Gif-sur-Yvette continuous measurements to estimate major greenhouse gases emission fluxes at regional scale. To make the link between atmospheric measurements and surface fluxes, we need to quantify dilution due to atmospheric transport. I used Radon-222 as tracer (radon tracer method) and planetary boundary layer heights estimates from ECMWF model (boundary layer budget method) to parameterize atmospheric transport. In both cases I compared results to available emission inventories. (author)

  16. Approaches of health risk assessment in air pollution; Les approches de l'evaluation des risques sanitaires lies a la pollution atmospherique

    Energy Technology Data Exchange (ETDEWEB)

    Festy, B. [Paris-5 Univ., 75 (France). Faculte des Sciences Pharmaceutiques et Biologiques de Paris-Luxembourg

    1997-07-01

    The relationships between health and environment are often difficult to establish due to the large number of contaminants and routes of absorption, the low doses involved, the type of effects (acute or chronic), the lack of specificity, the time before the effects are observed and the low individual risks. A great deal of knowledge is required, beginning with the source of emission and ending up with the effect on health, passing by the quality of the environments, the exposure for the individual and the groups and their perception of the phenomena in pedagogical, social and (dis)comfort terms. The North-American approach to assess the risk tries to understand these different problems by means of an approach that is as scientific, coherent and clear as possible: identification of the danger, estimate of its probability, evaluation of the exposure (populations, conditions) and synthetic characterization of the risk. This procedure comes before the difficult management of the risk and is absolutely necessary to determine the reference values and the standards. The chemical aspects of air pollution (A.P.) raise difficult problems in this area. In practice, the assessment of the risk involves environmental and biological phenomena. The environmental approach involves products (ex. fuels), processes and sources of emissions and, above all, the quality of the atmospheric environments ('immissions') due to the characterization and quantification of more or less classic physico-chemical indicators (SO{sub 2}, particles, NO{sub x}, O{sub 3}, metals, hydrocarbons, etc.) measured on the sites (monitoring networks) or in the laboratory, or more rarely, (eco)-toxicological, measured in the laboratory (cell models) or in the field (bio-indicators). The former provide a fairly exact idea of the external collective exposure of populations. The latter provide a more or less global and biological assessment of the quality of the air consisting of (geno)toxic potentialities. Bacteria and plant examples are provided by way of illustration. The biological approach first uses experimental methods with simplifying or complex biological models (from the bio-molecule to the animal or plant organism) providing qualitative and quantitative data (danger, mechanisms, dose effect function), for exact exposure concerning isolated pollutants or simple mixtures. Controlled human exposure is a more adequate way to study the acute effect thresholds and the dose-response relationships with set conditions of exposure. However, this is obviously limited by ethical considerations. The value and limits of these two experimental approaches will be discussed. Finally, the clinico-epidemiological approach provides knowledge of the harm of A.P. This either involves the clinical observation of accidents (professional or other) that generally arise on an individual scale or epidemiology. The latter identifies the risk factors, action thresholds, dose-response functions and the groups at risk. It uses surveys based on individual data (cross-sectional, cohort, case-control studies) or groups (multi-group temporal or mixed 'ecological' studies). The environmental data are generally collective and more rarely personalized. The health data measure the mortality, morbidity or objective effects or levels of health action (consultations, hospitalization, absenteeism, consumption of drugs, etc.). The advantages and limits of the epidemiological approach will be called to mind as well as the important idea of causality. Approaches of this type will be illustrated with nitrogen dioxide and/or ozone. (author)

  17. Is acidification still a major air pollution concern?; L`acidification est-elle encore un probleme majeur de pollution atmospherique?

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-12-31

    Although other forms of long-range air pollution are gaining attention, acidification remains an important issue in certain parts of Europe as well as in other continents. In spite of the European 88/609 directive limiting acid emissions from large fuel burning plants, a large part of Europe soils receives acid deposits superior to the tolerance threshold, known as critical loads. Thus, the European Union is considering several new measures, such as a more drastic 88/609 directive, the limitation of emissions country by country, the limitation of sulfur content in heavy fuels, etc. Emission inventories, evaluation tools, long range transfrontier pollution models, integrated assessment, etc. are presented, together with the positions of various French governmental departments, public authorities and industries concerning the european strategy against acidification

  18. Considering a point-source in a regional air pollution model; Prise en compte d`une source ponctuelle dans un modele regional de pollution atmospherique

    Energy Technology Data Exchange (ETDEWEB)

    Lipphardt, M.

    1997-06-19

    This thesis deals with the development and validation of a point-source plume model, with the aim to refine the representation of intensive point-source emissions in regional-scale air quality models. The plume is modelled at four levels of increasing complexity, from a modified Gaussian plume model to the Freiberg and Lusis ring model. Plume elevation is determined by Netterville`s plume rise model, using turbulence and atmospheric stability parameters. A model for the effect of a fine-scale turbulence on the mean concentrations in the plume is developed and integrated in the ring model. A comparison between results with and without considering micro-mixing shows the importance of this effect in a chemically reactive plume. The plume model is integrated into the Eulerian transport/chemistry model AIRQUAL, using an interface between Airqual and the sub-model, and interactions between the two scales are described. A simulation of an air pollution episode over Paris is carried out, showing that the utilization of such a sub-scale model improves the accuracy of the air quality model

  19. Mathematical study of chemical kinetics schemes. Application to air pollution models; Etude mathematique de schemas de cinetique chimique. Application a des modeles de pollution atmospherique

    Energy Technology Data Exchange (ETDEWEB)

    Billette, E.

    1997-06-23

    Complex chemical kinetics modelling is relevant in numerous fields related to the petroleum industry, for instance engine combustion, petrochemistry and atmospheric pollution. Many numerical difficulties are encountered in the computation of these models, mainly due to the large size, the non-linearity and the stiffness of the associated ordinary differential systems. We first studied systems that have an asymptotic behaviour which may be derived from an algebraic analysis. Then we reviewed different methods that make possible the reduction of size and stiffness for chemical kinetics-related differential systems, and suggest possible improvements for some of those methods. We also studied their application to atmospheric chemistry models. Finally, we started to extend those reduction methods to partial differential systems that include, in addition to chemical kinetics, other phenomena such as species emission, advection or diffusion. (author) 44 refs.

  20. Detection of atmospheric tritium by scintillation. Variations in its concentration in France; Detection du tritium atmospherique par scintillation. Evolution de sa concentration en France

    Energy Technology Data Exchange (ETDEWEB)

    Bibron, R. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1964-06-01

    The tritium released into the atmosphere as a result of the explosion of thermonuclear devices is a useful radioactive tracer for the study of certain geophysical problems. The low concentrations found however call for the use of extremely sensitive detectors. Two detection methods using liquid scintillators are described. In the first method, the sample is introduced into the scintillator in liquid form, after prior concentration of the tritium by electrolysis. In the second method the tritium is incorporated into the scintillator solvent molecule by chemical synthesis. In the last part of the report are examined the variations in the tritium concentration in rain-water and of the free hydrogen in the air in France. A discussion is then made of the seasonal variations in the case of rain-water and these are compared to the variations in the strontium-90 concentrations. (author) [French] Le tritium introduit dans l'atmosphere par les explosions d'armes thermonucleaires est un traceur radioactif Interessant pour l'etude de certains problemes de geophysique. Les faibles concentrations rencontrees obligent toutefois a utiliser des detecteurs extremement sensibles. On decrit deux methodes de detection utilisant des scintillateurs liquides. Dans la premiere methode, l'echantillon est introduit dans le scintillateur, sous forme aqueuse, apres une concentration prealable du tritium par electrolyse. Dans la seconde methode, le tritium est incorpore a la molecule du solvant du scintillateur par synthese chimique. Dans la derniere partie du rapport, on examine l'evolution de la concentration du tritium dans les eaux de precipitation et l'hydrogene libre de l'air en France. On discute ensuite les variations saisonnieres dans le cas des eaux de precipitation et on les compare aux variations du strontium 90. (auteur)

  1. Assessment of exposure to atmospheric particles: contribution of individual measurements; Evaluation de l'exposition aux particules atmospheriques: apport des mesures individuelles

    Energy Technology Data Exchange (ETDEWEB)

    Mosqueron, L.; Momas, I. [Universite Rene Descartes, Faculte des Sciences Pharmaceutiques et Biologiques, Lab. d' Hygiene et de Sante Publique, 75 - Paris (France); Le Moullec, Y. [Laboratoire d' Hygiene de la Ville de Paris, 75 (France); Momas, I. [Direction de l' Action Sociale, de l' Enfance et de la Sante, Cellule Epidemiologie, 75 - Paris (France)

    2001-02-01

    There are few studies of individual exposure to atmospheric particles, because of the relatively bulky and noisy sampling devices. These personalized measurements, generally associated with micro-environmental measurements, are aimed at studying the distribution of individual exposure and identifying its main determinants. Methods: A synopsis of the methods implemented in such studies (populations studied, measurements strategies, questionnaires on time-activity patterns, residences and work place) was detailed. The major results are presented and discussed from an epidemiological point of view. Results: The individual exposure measured with portable devices generally were generally found to be higher than the estimations made by combining micro-environmental (outdoor and indoor) measurements and data from time-activity diaries. The difference between results of these two approaches, known as 'personal cloud', remains poorly understood. Correlations between individual measurements and outdoor concentrations are weak; nevertheless, day to day variations of these two series of measurements are better related. The main determinants of individual exposure to particles are identified but a quantification of their contribution remains difficult, except for passive smoking. Conclusion: Personal measurements cannot be used to estimate particle exposure in large scale epidemiological studies. This exposure needs to be modeled. (authors)

  2. Peaks of air pollution and public health. The place of epidemiology; Pics de pollution atmospherique et sante publique. La place de l'epidemiologie

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    The epidemiological surveillance of sanitary effects linked to the air pollution seems to be the best tool to estimate their impact and to keep a close eye on the short term effects of the ambient pollution on the populations health. In any case, the potential sanitary impact of pollution peaks does not conceal the importance of sanitary effects linked to the background pollution. These peaks constitute sanitary alert signals but are not inevitably the predominant risk for public health. A targeting on these peaks can lead to neglect actions of prevention and to induce these policies towards strategies that will not be the most efficient in term of reduction of mortality attributable to air pollution. (N.C.)

  3. Experimental and theoretical study of the atmospheric boundary layer over the paris area; Etude experimentale et theorique de la couche limite atmospherique en agglomeration parisienne

    Energy Technology Data Exchange (ETDEWEB)

    Menut, L

    1997-12-15

    This thesis studied the urban boundary layer dynamic behaviour over the Paris area by comparing urban (Paris) and suburban (Palaiseau) dynamic data such as lidars, sodars, sonic anemometers. All the data were obtained during the ECLAP experiment, specifically performed to characterize the differences between a city and its near environment. (author)

  4. Origins of atmospheric aerosols. Basic concepts on aerosol main physical properties; L`aerosol atmospherique: ses origines quelques notions sur les principales proprietes physiques des aerosols

    Energy Technology Data Exchange (ETDEWEB)

    Renoux, A. [Paris-12 Univ., 94 - Creteil (France). Laboratoire de Physique des aerosols et de transferts des contaminations

    1996-12-31

    Natural and anthropogenic sources of atmospheric aerosols are reviewed and indications of their concentrations and granulometry are given. Calculation of the lifetime of an atmospheric aerosol of a certain size is presented and the various modes of aerosol granulometry and their relations with photochemical and physico-chemical processes in the atmosphere are discussed. The main physical, electrical and optical properties of aerosols are also presented: diffusion coefficient, dynamic mobility and relaxation time, Stokes number, limit rate of fall, electrical mobility, optical diffraction

  5. Atmospheric greenhouse effect: more subtle than it looks like; L'effet de serre atmospherique: plus subtil qu'on ne le croit

    Energy Technology Data Exchange (ETDEWEB)

    Dufresne, J.L. [Laboratoire de Meteorologie Dynamique (LMD), Institut Pierre-Simon Laplace (IPSL), CNRS, Universite Pierre et Marie Curie, 75 - Paris (France); Treiner, J. [Paris-6, UPMC et Espace des sciences Pierre-Gilles de Gennes, 75 - Paris (France)

    2011-02-15

    State-of-the-art radiative models can be used to calculate in a rigorous and accurate manner the atmospheric greenhouse effect, as well as its variation with concentration in water vapour or carbon dioxide. A simple explanation of this effect uses an analogy with the greenhouse effect produced by a glass window. While this analogy has pedagogical virtues and provides a first order explanation of the mean temperature of the Earth, it has an important drawback; it is not able to explain why the greenhouse effect increases with increasing carbon dioxide concentration. Indeed, absorption of infrared radiation by carbon dioxide is, under this scheme, almost at its maximum and depends very weakly on CO{sub 2} concentration. It is said to be saturated. In this paper, we explore this question and propose an alternative model which, while remaining simple, correctly takes into account the various mechanisms and provides an understanding of the increasing greenhouse effect with CO{sub 2} concentration, together with the corresponding climate warming. The role of the atmospheric temperature gradient is particularly stressed. (authors)

  6. Inventory of atmospheric pollutants emissions in France - sectorial series and extensive analysis; Inventaire des emissions de polluants atmospheriques en France - serie sectorielles et analyses etendues

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-02-01

    The present report supplies an update of emissions into the atmosphere within the french metropolitan area in the frame of the CORALIE programme according to the 'SECTEN' format defined by CITEPA which raises to report emissions relating to usual economic entities such as industry residential/tertiary, agriculture, etc. Basically, results deal systematically with the period 1990 - 2001, but cover also more extended ranges of time, especially from 1980 for some substances to be considered in the frame of the protocols under the convention on the long range transboundary air pollution and from 1960 for some other substances traditionally inventoried by CITEPA for a long time. Data are presented for 28 different substances and various indicators such as those related to acidification or greenhouse effect. It is observed for most of substances that emissions have been drastically reduced over the ten or twenty last years. More especially for the period 1990 - 2000: The results are presented at the national level for each of the main sectors defined in the SECTEN format. A more detailed breakdown of each main sector is provided for 2000. Results are also given relating to different energy products and several analysis present additional highlights for NMVOCs, HFCs, PFCs and particular sources such as transports. The report contains indications regarding the targets committed by France in the frame of international conventions and directives from the European Union directives. These indications demonstrate that emission trends observed are generally encouraging. The table below summarizes total emissions over the period 1990 - 2001 for all substances mentioned above as well as indicators relating to the acidification and to the greenhouse effect. (author)

  7. The 1979 convention on long range transfrontier air pollution; La convention sur la pollution atmospherique transfrontiere a longue distance de 1979

    Energy Technology Data Exchange (ETDEWEB)

    Jagusiewicz, A. [UNECE, Palais des Nations, Geneve (Switzerland)

    1997-12-31

    Applied in March 1983, the 1979 international Convention have induced five protocols related to sulfur, nitrogen oxide and VOC emissions. After 1994, three new protocols are under study, concerning the reduction of nitrogenous and related compounds, heavy metals and long-lasting organic pollutants. Works and organization of the European EMEP program for the continuous monitoring and evaluation of the long range air pollution transport in Europe, are presented

  8. Is acidification still a major air pollution concern?; L`acidification est-elle encore un probleme majeur de pollution atmospherique

    Energy Technology Data Exchange (ETDEWEB)

    Le Bellac, C. [INES, 75 - Paris (France)

    1997-12-31

    The issue of acid emissions from district space heating systems, which burn heavy fuels and coal, is discussed: it is shown that nitrogen oxide emissions are relatively low; for sulfur dioxide, three solutions are possible: switching to natural gas, but peak periods would require stored fuels; reducing the sulfur content in fuels, but its prices are too erratic; and de-sulfurizing the combustion smokes, but it does not appears as economically sustainable, as the prices for quality fuels and difficult fuels are close and low. It is reminded that district space heating is more especially aimed at council buildings

  9. Modelling atmospheric circulations for the study of Alpine valleys pollution; Modelisation des circulations atmospheriques pour l'etude de la pollution des vallees alpines

    Energy Technology Data Exchange (ETDEWEB)

    Brulfert, G.

    2004-11-15

    Local weather phenomena observed in alpine valleys frequently lead to the accumulation of emitted anthropogenic airborne species in the low layers of the atmosphere. The development of a numerical model allows reproducing the chemical evolution of air mass during POVA intensive period of observations. In Chamonix and Maurienne valley, computations of photochemical indicators (NO{sub y}, O{sub 3}/NO{sub z}, H{sub 2}O{sub 2}/HNO{sub 3}) prove the ozone regime to be control by volatile organic compounds. Moreover simulation highlighted that the major part of this secondary pollutant is regionally produced. The development of an indicator who localised ozone production sites can help to define abatement scenarios. The chemical mechanism RACM allows describing the evolution of many species. It is possible to conclude that in winter road traffic and heating are the main sources of volatile organic compounds. (author)

  10. Modeling of the air pollution on various scales; Modelisation de la pollution atmospherique a differentes echelles. confrontations simulations/mesures pour la preparation d'Escompte 2001

    Energy Technology Data Exchange (ETDEWEB)

    Meleux, F.

    2002-11-15

    On June and July 2001, the campaign ESCOMPTE took place in the Marseille area in southern of France, with the aim of generating a detailed 3-D data base for the study of dynamics and chemistry of high pollution events so as to validate and improve air quality models. Previous to this field experiment, a pre-modelling exercise has been performed to document the dynamic interactions between sea and land breezes and orographic flows over this complex topographical area. This study was carried out using a nesting procedure at local and regional scales using the MESO-NH model (jointly developed by Laboratoire d'Aerologie and Meteofrance at Toulouse). Tracers emitted at various locations in the Marseille and Etang de Berre areas were first followed, then in a second step, full chemistry simulations have been run for two selected periods on June and July 1999, quite similar to the meteorological situations met during the IOP2a and the IOP4 in the 2001 campaign. The performance of the model has been assessed by comparing measured data with simulated data for meteorological parameters and ozone. The general ability of the model to correctly simulate these two situations allows to further study ozone plume developments. In particular, these studies bear upon the relative roles of O{sub 3} transport versus O{sub 3} chemical production, as a function of distance within the plume to anthropogenic emissions and biogenic emissions, together with ozone daily variations and peak values observed at rural sites. After that, ozone chemical production sensitivity is analysed in regards to its precursors. (author)

  11. Air pollution emission reduction techniques in combustion plants; Technique de reduction des emissions de polluants atmospheriques dans les installations de combustion

    Energy Technology Data Exchange (ETDEWEB)

    Bouscaren, R. [CITEPA, Centre Interprofessionnel Technique d`Etudes de la Pollution Atmospherique, 75 - Paris (France)

    1996-12-31

    Separating techniques offer a large choice between various procedures for air pollution reduction in combustion plants: mechanical, electrical, filtering, hydraulic, chemical, physical, catalytic, thermal and biological processes. Many environment-friendly equipment use such separating techniques, particularly for dust cleaning and fume desulfurizing and more recently for the abatement of volatile organic pollutants or dioxins and furans. These processes are briefly described

  12. Source, flux and balance of atmospheric deposition of metals at Ile-de-France; Source, flux et bilan des retombees atmospheriques de metaux en Ile de France

    Energy Technology Data Exchange (ETDEWEB)

    Azimi, S

    2004-07-15

    The urban atmosphere is submitted to large inputs of anthropogenic contaminants arising from both stationary (power plants, industries, etc.) and mobile (road traffic) sources. These small particles may be transported over long distances and affect ecosystems. Significant dry and wet atmospheric deposition also occurs locally and contributes to the contamination of urban runoff. The aim of this study is to compare heavy metal and hydrocarbon atmospheric deposition fluxes to other input ways on agricultural and urban areas to assess their importance. Moreover, a source investigation has been done to identify the main origins of these pollutants. Before the quantification of pollutant fluxes, a comparison of several sampling procedures was performed. As a result, the sampling of total atmospheric deposition is not affected by the funnel material (Teflon and polyethylene) or by the sampling duration (7 and 28 days). However, the rinsing step of the funnel walls showed a higher relative importance during short sampling periods. The relative amount contained in these solutions reached 24 to 40 % of the total flux during weekly sampling periods and 8 to 18 % during monthly sampling periods, whatever the element considered. The temporal evolution of atmospheric deposition showed no seasonal influence on flux variations during the 2001-2002 period. Considering an 8-year period behaviour, between 1994 and 2002, a significant decrease of the deposition fluxes of Cd, Cu, Pb and Zn occurred at the Creteil site which is placed in an industrialized area of the Paris suburb. The decreasing factor reached 16, 2.5, 4 and 7.5 for these elements respectively. At the Ile-de-France scale, the deposition flux levels on urban and semi-urban areas were of the same order of magnitude (?20 tonnes per year for Ba, Cu, Pb and Sr). Since semi-urban surface area is four times higher than urban ones, the important influence of anthropogenic activities on atmospheric deposition of urban areas is evidenced. At the Seine River catchment scale, the atmospheric deposition levels were of the same order of magnitude as Seine River particle contents measured at the catchment estuary (Poses). The flux ratio between atmospheric inputs and Seine particles ranged between 0.8 and 4.8 for Al, Cd, Co, Cu, Fe, Mn, Ni, Pb and Zn. The importance of atmospheric deposition of metals was estimated on agricultural and urban areas. In the first case, the atmospheric fallout appears as the main input way of Cu, Ni and Pb to agro-systems while Cd is mainly introduced by fertilizers. These two input ways induced an increase of Cd, Ni and Pb in the cultivated horizon with an annual balance reaching 0.33, 0.014 and 0.014 %, respectively, of actual stocks while the Cu showed a decrease with an annual balance reaching 0.024 %. In the second case, atmospheric deposition was compared to roof and street runoff. The atmospheric deposition is the main introducing way of most of considered elements, compared to roof runoff excepting Cu, Pb, Ti and Zn which are mainly emitted by the latter. Nevertheless, compared to street runoff, atmospheric deposition levels are 1.5 to 27 times lower than street cleaning ones showing that atmospheric introducing way is not the main introducing way of metals in urban areas. The source investigation on atmospheric deposition was performed using several tools developed during this study. The results allow the characterisation of the anthropogenic sources considered using specific elements or ratios. These tools were applied to the atmospheric deposition data but they did not allowed the determination of anthropogenic activities because of the atmospheric mixture. (author)

  13. Aménagements urbains et dégradation de la phytodiversité dans la ...

    African Journals Online (AJOL)

    http://dx.doi.org/10.4314/jab.v91i1.9 · AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors · FAQ's · More about AJOL · AJOL's Partners · Terms and Conditions of Use · Contact AJOL · News. OTHER RESOURCES... for Researchers · for Journals · for Authors · for Policy Makers ...

  14. Santé de l'écosystème urbain à Katmandou, au Népal - phase III ...

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

    Les deux phases antérieures de ce projet (nos 003320 et 101277) ont permis la création et le renforcement de 18 groupes locaux ainsi que l'élaboration d'une nouvelle loi sur ... Assistance in synthesis and documentation of health, environment and development outcomes in urban eco-health project, Katmandu : report.

  15. Gestion des déchets ménagers en milieu urbain à l'aide d'une ...

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

    Le nouveau site Web facilitera l'enregistrement des événements démographiques afin d'améliorer l'accès aux services pour tous. Le nouveau site Web et la nouvelle bibliothèque de ressources aideront à améliorer les systèmes d'information et d'enregistrement des faits d'état civil dans les pays en développement.

  16. Réhabilitation, gestion et mise en valeur touristique de l’enceinte urbaine d’Ibiza (Espagne

    Directory of Open Access Journals (Sweden)

    Fernando Cobos-Guerra

    2011-07-01

    Full Text Available Les premiers travaux de restauration programmés dans le cadre du Plan Directeur de la Muraille d’Ibiza récupèrent certains des éléments les plus importants de cet ensemble déclaré Patrimoine Mondial en 1999, suivant les critères du Plan dont l’objectif était de documenter, préserver et réhabiliter le tracé de la Renaissance. Les interventions initiales ont consisté à réhabiliter les casemates et les espaces intérieurs des bastions, à consolider les parapets de la muraille en respectant les différents types existants et à restaurer les deux portes de la Renaissance. De plus, au Portal Nou, on a retiré le revêtement du XIXe siècle, mettant ainsi au jour l’agencement d’origine et les dimensions de l’arc Renaissance projeté par J.B. Calvi en 1554.The earliest restoration work carried out the Ibiza city wall, under the terms of an overall restoration plan, saved some of the most important elements of this ensemble, which was declared a UNESCO World Heritage site in 1999. The objectives of the restoration plan were to document, preserve and rehabilitate the Renaissance vestiges. The first steps involved the rehabilitation of the bunkers and the interior spaces of the bastions, the reinforcement of the wall's parapets, all respecting the different types to be found, and the restoration of two Renaissance gates. At the Portal Nou, the nineteenth-century rendering was removed to reveal the original surfaces and the dimensions of the Renaissance arch designed by J. B. Calvi in 1554.

  17. Chaire en écosanté sur la pollution urbaine de l'air et les maladies ...

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

    Carrières · Communiquez avec nous · Plan du site. Abonnez-vous à notre bulletin pour recevoir les nouvelles du CRDI chaque mois. Abonnez-vous · Droits d'auteur · Éthique de la recherche · Politique de libre accès · Politique de confidentialité · Transparence · Utilisation du site Web. Suivez-nous; Facebook · Twitter ...

  18. Solutionner les problèmes du système d'autobus urbain au Salvador ...

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

    Un trajet en autobus public au Salvador peut être une expérience périlleuse, mais un projet de recherche contribue à améliorer ce système de transport qui dessert des millions de gens. Cet article fait partie d'une série de reportages sur des projets innovants mis en œuvre dans les pays en développement, compilée dans ...

  19. La participation sociale des personnes en situation de pauvreté dans un organisme communautaire en milieu urbain

    OpenAIRE

    Desmarquis, Myriam

    2009-01-01

    La recherche porte sur la participation sociale des personnes en situation de pauvreté dans les organismes communautaires. Les constats émanent d'une étude de cas réalisée dans un organisme communautaire qui lutte contre la pauvreté en offrant des services et des activités visant l'amélioration des conditions de vie des participants et des participantes. D'abord, la problématique est abordée sous l'angle des enjeux de la participation sociale liés au contexte de pauvreté. En effet, la pauvret...

  20. Classification d'images RSO polarimétriques à haute résolution spatiale sur site urbain.

    OpenAIRE

    Soheili Majd , Maryam

    2014-01-01

    In this research, our aim is to assess the potential of a one single look high spatial resolution polarimetric radar image for the classification of urban areas. For that purpose, we concentrate on classes corresponding to different kinds of roofs, objects and ground surfaces.At first, we propose a uni-variate statistical analysis of polarimetric and texture attributes, that can be used in a classification algorithm. We perform a statistical analysis of descriptors and show that the Fisher di...

  1. Pauvreté, inégalités et violence en milieu urbain en Inde : vers un ...

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

    Briefs. Bombay Hotel : crime, violence and unsafe spaces in informal commercial subdivisions. Download PDF. Briefs. Bombay Hotel : everyday conflicts in basic services in informal commercial subdivisions. Download PDF. Briefs. Bombay Hotel : tenure insecurity and land conflicts in informal commercial subdivisions.

  2. Chapitre 8 – Production et qualification de l’espace urbain : entre informel et corruption

    OpenAIRE

    David, Jean-Claude

    2014-01-01

    Les habitants/créateurs de quartiers informels à l’est de la ville, sous-produits de l’urbanisme, la jeunesse dorée des quartiers aisés de l’ouest qui fréquente les fast foods et renforce le profond clivage social entre l’est et l’ouest, les réfugiés palestiniens et leurs descendants habitants de deux « camps » à Alep, qui entretiennent leur propre marginalité, les imams originaires de la région rurale d’Alep qui « entrent » dans la ville et l’investissent par la confrérie Nabhaniyya, n’ont p...

  3. Pour une approche spatialisée de la pratique sportive: l’exemple du football en milieu urbain

    Directory of Open Access Journals (Sweden)

    Frédéric Grosjean

    2004-12-01

    Full Text Available The widespread expression of football confers on it the role of a service. A factor of community spirit in villages (basic service, in cities it conveys a more differentiated image (from a local service to an elite or scarce service. City clubs must adapt to varied demand (a recreational or competitive sport. The map of their recruitment areas shows up highly different spatial forms. City clubs’ recruitment areas reflect their purpose more than their local affiliation.

  4. Criminalité et pénalisation de la pauvreté dans les centres urbains ...

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

    criminalité-pauvreté, car il en découle des cercles vicieux. •. Des liens communautaires forts préviennent habituellement la criminalité, toutefois, dans les quartiers, ces liens découragent la dénonciation des crimes, car les policiers sont vus comme des « étrangers ». Villes sûres et inclusives. RÉSULTATS DE RECHERCHE.

  5. Gestion décentralisée des déchets solides urbains en Indonésie ...

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

    Decentralized Urban Solid Waste Management in Indonesia. Urban areas of Indonesia generate about 55 000 tonnes of solid waste per day, an amount that is expected to triple by 2025. View moreDecentralized Urban Solid Waste Management in Indonesia ...

  6. L'agriculture urbaine pourrait accroître la sécurité alimentaire dans ...

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

    Eau embouteillée ou eau du robinet ? Étude de la perception de l'eau au Liban et en Jordanie. Des chercheurs ont évalué la qualité de l'eau distribuée dans deux établissements spontanés, l'un au Liban et l'autre en Jordanie. Ils ont réalisé. Voir davantageEau embouteillée ou eau du robinet ? Étude de la perception de ...

  7. Le rôle de la puissance publique dans la production des espaces urbains au Liban

    Directory of Open Access Journals (Sweden)

    Walid Bakhos

    2005-12-01

    Full Text Available The state’s ability to control urbanisation through town planning regulations has been very limited in Lebanon, where the civil war (1975-1990 has had a major impact on movement of people and relocation of economic activities. However it is possible to establish a relationship between the contents of urban master plans and the distribution of urban development at both national and local levels.

  8. Relations theoriques entre differents modeles d'écoulement et de ruissellement utilisés en hydrologie urbaine

    Science.gov (United States)

    Thibault, S.; Chocat, B.; Botta, H.

    1980-11-01

    Urban hydrology uses a large variety of models to represent flood routing and runoff. These are semi-empirical models restricted as to their range of applicability and without sound theoretical foundations. It therefore seems to us fundamental to reconsider these models in order to identify their conceptual value and any links they may have with hydrodynamic theory. These links establish a theoretical base and permit the elaboration of a runoff or flood routing model which generalizes all existing linear conceptual models.

  9. Vivre ensemble en pays d’islam : territorialisation et marquage identitaire de l’espace urbain

    Directory of Open Access Journals (Sweden)

    Méropi Anastassiadou-Dumont

    2012-01-01

    Full Text Available Vaste sujet, les contacts et échanges, en pays d’islam, entre populations d’appartenances religieuses différentes ont déjà fait couler beaucoup d’encre. Pourquoi revisiter ce terrain ? D’abord parce que la multiplication, au cours de ces dernières années, des études de cas, éclairant des aspects partiels appelait à une confrontation générale des avancées enregistrées par la recherche. Ensuite, parce qu’il nous a semblé utile de réunir des études rendant compte de la diversité des situations e...

  10. Criminalité et « pénalisation de pauvreté » dans les centres urbains ...

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

    ensemble du pays, mais la criminalité et la violence sont à la hausse. Des chercheurs de l'université du Ghana soutenus par le CRDI ont mené une enquête pour essayer de déterminer pourquoi la réduction de la pauvreté ...

  11. Pauvreté, inégalités et violence en milieu urbain en Inde : vers un ...

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

    The Justice Project in South Asia. As countries in South Asia move toward greater economic integration, a range of interconnected challenges to constitutional and human rights guarantees are emerging. View moreThe Justice Project in South Asia · What we do · Funding · Resources · About IDRC. Knowledge. Innovation.

  12. Urban, Indoor and Subterranean Navigation Sensors and Systems (Capteurs et systemes de navigation urbains, interieurs et souterrains)

    Science.gov (United States)

    2010-11-01

    3-10 Multiple Images of an Image Sequence Figure 3-10 A Digital Magnetic Compass from KVH Industries 3-11 Figure 3-11 Earth’s Magnetic Field 3-11...ARINO SENER – Ingenieria y Sistemas S.A Aerospace Division Parque Tecnologico de Madrid Calle Severo Ocho 4 28760 Tres Cantos Madrid Email...experts from government, academia, industry and the military produced an analysis of future navigation sensors and systems whose performance

  13. Environnement familial et disparités de santé dentaire des enfants en milieu urbain au Burkina Faso

    DEFF Research Database (Denmark)

    Varenne, B; Fournet, F; Cadot, E

    2011-01-01

    Background Dental caries is the most common multifactorial disease in children and has substantial negative impact on daily life. In sub-Saharan Africa, few data are available on the relationship between dental caries and the social and family environment of children. The objectives of the present......, the accessibility of quality fluoride products (e.g. toothpaste, salt, water) should be facilitated as soon as possible....

  14. Theme 10: greenhouse effect transport policies and urban organization; Theme 10: effet de serre politiques de deplacements et organisation urbaine

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    This document describes the reference framework of the theme 10 ''greenhouse effect, transport policies and urban organization'' which is a part of the urban transports interface. It presents the specific actions realized by the theme 10 for a future integration in theme 1, 5 and 8. (A.L.B.)

  15. Sociabilité et socialité urbaine chez Park. Sur les traces de Simmel ?

    Directory of Open Access Journals (Sweden)

    Françoise Reumaux

    2008-04-01

    Full Text Available Que Georg Simmel ait exercé une influence sur Robert Park est une assertion désormais courante qui figure dans la plupart des ouvrages de référence à l’École de Chicago. Il est pour cette raison intéressant de préciser la nature de cette influence et plus particulièrement autour de la figure de l’étranger et de la ville, ce milieu qui lui serait si favorable. Nous nous proposons de montrer comment cette inspiration venue de Georg Simmel a permis à Robert Park de faire néanmoins œuvre originale, tout en resituant cette œuvre dans le contexte d’idées de l’époque. Nous nous proposons également de réfléchir sur les notions de distance, conscience de soi et position, telles que théorisées par Robert Park, dans la perspective qui inscrit aujourd’hui une nouvelle figure de la mobilité dans le contexte de la mondialisation, le migrant.Sociability and urban sociality in Robert Park’s work. Following Georg Simmel ?Simmel’s influence over Robert Park’s work is already well known and there are most researchers that do mention it when they refer to Chicago’s sociology of twenties. For that reason, it is interesting to define the nature of this influence, especially when it concerns the figure of the stranger and its inscription in the urban environment. We suggest to examine how this inspiration has permitted to be innovative in the context of ideas of that period and how the notions of distance, consciousness and position, that Park has theorized, may be linked with a new figure of mobility in the context of globalization, the migrant.¿La sociabilidad y la socialidad urbana en la obra de Robert Park. Sobre las huellas de Simmel? La influencia de Georg Simmel sobre la obra de Robert Park es conocida y encontramos esta aserción en la mayoría de los ensayos que se refieren a la Escuela de Chicago en los anos 1920. Por esta razón precisamente, nos parece interesante precisar esta influencia interesándonos en particular en la figura del extranjero y de la ciudad, reconocida como un ambiente que lo favorecía. Así, nos proponemos analizar el modo en que una tal inspiración ha permitido que Park fuese novador, teniendo en cuenta el contexto de las ideas de su época. y como las categorías de la distancia, de la consciencia de si y de la posición, teorizadas por Park, se inscriben en la perspectiva contemporánea de la nueva figura de la movilidad aparecida con la mundializacion, el migrante.

  16. Santé de l'écosystème urbain à Katmandou, au Népal - phase III ...

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

    Les deux phases antérieures de ce projet (nos 003320 et 101277) ont permis la création et le renforcement de 18 groupes locaux ainsi que l'élaboration d'une nouvelle loi sur l'abattage des animaux et l'inspection des viandes, des amendements à la loi sur l'inspection des aliments et à la loi sur l'enlèvement des ordures ...

  17. Agriculture urbaine et subsistance des ménages dans une zone de post-conflit en Afrique centrale

    Directory of Open Access Journals (Sweden)

    Thys E.

    2006-01-01

    Full Text Available Urban agriculture and household subsistence in a post-confl ict zone in Central Africa. This study presents an analysis of the technical and socio-economic specifi cities of urban agriculture in a post confl ict region in Central Africa, based on a survey in Brazzaville (Congo in 2002. Hereby 710 households have been randomly selected from a previous survey data base containing 2 800 urban households. About one third of the Brazzaville households are involved in urban agriculture with 29.5% households reporting crop production activities and 8.8% animal production activities. Within animal production, aviculture activities are dominant. Gardening and vegetable production play also an important role. The confl ict situation of 1997 affected negatively urban agricultural production in particular the animal production. Although, urban agriculture is present among different social and professional categories, there is a clear dominance of subsistence and poor households, especially those already active in agriculture before. In contrast to crop production, mainly practised for subsistence reasons, the motivation for animal production is driven more by the income than by the own consumption possibilities. The results also indicate that assuring a sustainable and equitable urban development is possible by a good balance between those practising urban agriculture and those not. This requires the limitation of the negative effects (odour and other nuisances but also the removal of certain constraints limiting the productivity of urban farming, most importantly the provision of inputs, the theft of animals and soil degradation.

  18. Pauvreté, inégalités et violence en milieu urbain en Inde : vers un ...

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

    Carrières · Communiquez avec nous · Plan du site. Abonnez-vous à notre bulletin pour recevoir les nouvelles du CRDI chaque mois. Abonnez-vous · Droits d'auteur · Éthique de la recherche · Politique de libre accès · Politique de confidentialité · Transparence · Utilisation du site Web. Suivez-nous; Facebook · Twitter ...

  19. Gestion intégrée de l'eau urbaine et rurale pour une adaptation ...

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

    Ce projet de recherche permettra à deux villes indiennes de taille moyenne et à leurs bassins de passer à une approche de gestion de l'eau intégrée et résistante aux changements climatiques, ce qui assurera une meilleure sécurité hydrique aux résidents. Manque de sécurité hydrique en Inde Les villes de l'Asie du Sud ...

  20. Measurement of electro-sprayed 238 and 239+240 plutonium isotopes using 4{pi}-alpha spectrometry. Application to environmental samples; Spectrometrie alpha 4{pi} de sources d'actinides realisees par electronebulisation. Developpement et optimisation d'un protocole applique au mesurage des isotopes 238 et 239+240 du plutonium dans l'environnement

    Energy Technology Data Exchange (ETDEWEB)

    Charmoille-Roblot, M. [CEA/Fontenay-aux-Roses, Dept. de Protection de l' Environnement (DPRE), 92 (France)]|[Paris-11 Univ., 91 - Orsay (France)

    1999-07-01

    A new protocol for plutonium deposition using the electro-spray technique coupled with 4{pi}-{alpha} spectrometry is proposed to improve the detection limit, shorten the counting time. In order to increase the detection efficiency, it was proposed to measure 238 and 239+240 plutonium isotopes electro-sprayed deposit simultaneously on both sides of the source support, that must be as transparent as possible to alpha-emissions, in a two-alpha detectors chamber. A radiochemical protocol was adapted to electro-spray constraints and a very thin carbon foil was selected for 4{pi} -alpha spectrometry. The method was applied to a batch of sediment samples and gave the same results as an electrodeposited source measured using conventional alpha spectrometry with a 25 % gain on counting time and 10 % on plutonium 238 detection limit. Validation and application of the technique have been made on reference samples. (author)

  1. Synthesis of the evaluations of electromagnetic flowmeters based on vortex, Coriolis and thermal effects in the framework of SIREP-WIB-EXERA associations; Syntese des evaluations de debitmetres electromagnetiques a effet vortex, Coriolis, et thermique, realisees dans le cadre des associations SIREP-WIP-EXERA

    Energy Technology Data Exchange (ETDEWEB)

    Fortin, T.; Jacq, F. [Electricite de France (EDF), Direction des Etudes et Recherches, 92 - Clamart (France)

    1997-12-31

    Electronic flowmeters such as electromagnetic flowmeters based on vortex, mass (Coriolis) and thermal effects are being used more and more in industry (water distribution, petrochemicals, food processing). Some of them are used by EDF. A study has been therefore conducted on the main types of flowmeters which in the last years (1988-1995) were the object of an evaluation within the framework of the SIREP-WIB-EXERA users. This document synthesizes the tests conducted, and highlights the generic weaknesses linked with different methods of measurement, equipment and test methods. It meets a triple objective: 1 - up dating the EDF`s knowledge on these different products; 2 -better knowledge of the diversity of problems connected with measuring flows (type and characteristics of fluids, flow ranges, environmental constraints etc.); 3 - showing the advantages and disadvantages associated with these methods and lining up different technologies with one another. As a whole from the metrological standpoint the equipment tested complies with the manufacturers` specifications. Most of this equipment highly sensitive to electromagnetic perturbations. When the European CEM directives are applied this defect should disappear. Other environmental tests do not reveal generic faults. For all the technologies evaluated it may be stated that the ranges of tests are very standardized. Unfortunately, a certain number of well thought out tests (according to the technology) are not, or rarely conducted. For instance, one can quote the vibration influence tests for vortex effect flowmeters. Advanced research has been carried out. It mainly concerns cavitation phenomena (Coriolis effect flowmeters) and the influence of viscosity and conductivity of fluids (electromagnetic and Coriolis effect flowmeters). (author). 16 refs.

  2. Scintigraphic survey of liver grafts in acute phase: influence of choledoco-choledocian anastomosis realized in 13 cases with and in 13 other cases without Kehr drain. Surveillance scintigraphique des greffes du foie a la phase aigue: incidence de l'anastomose choledoco-choledocienne realisee dans 13 cas avec et dans 13 autres cas Sans drain de Kehr

    Energy Technology Data Exchange (ETDEWEB)

    Brunot, B.; Constantinesco, A.; Altieri, M. (Centre Hospitalier Universitaire, 67 - Strasbourg (France))

    1992-12-01

    This work shows that hepato-biliary scintigraphy is of great interest to keep track of patients just liver transplanted. This investigation is easy to realize without any constraint for the patient and provide data to detect principal complications of transplantation. 8 refs., 4 tabs.

  3. Use of 14 MeV neutrons in activation analysis. Experiments carried out at the Grenoble nuclear research Centre (1963); Utilisation de neutrons de 14 MeV en analyse par activation. Experience realisee au Centre d'etudes nucleaires de Grenoble (1963)

    Energy Technology Data Exchange (ETDEWEB)

    Auboin, G; Guazzoni, P; Laverlochere, J [Commisariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

    1963-07-01

    The use of 14 MeV neutron irradiation makes it possible to extend the field of application of activation analysis to elements which cannot be activated in nuclear reactors (oxygen, boron, for example) or else to consider the possibility of 'portable' measurement units for routine analyses. With this aim, tests have been carried out for studying the sensitivity and interferences in the case of the dosing of oxygen in eleven different matrices using 150 and 300 kV SAMES accelerators producing 14 MeV neutrons by the reaction {sup 3}H (d, n) {sup 4}He. The sensitivity of the dosage methods for six writer elements has also been studied. The results obtained show that, for a neutron flux of 10{sup 10} n/4{pi}, the sensitivities vary from 100 {mu}g and 1 mg for oxygen in nine matrices (Be, Ta, Nb, Ti, Zr, Fe, Al, Sb, Si) and that it is possible to dose the six elements F, B, Y, Si, N, Al with sensitivities of between 1 an 1000 micrograms. (authors) [French] L'irradiation au moyen de neutrons de 14 MeV permet d'etendre le domaine d'application de l'analyse par activation a des elements non activables en reacteur nucleaire (oxygene, bore, par exemple) ou encore d'envisager des unites de dosage ''portables'' pour des analyses de routine. Dans ce but, des essais ont ete effectues pour etudier les sensibilites et les interferences dans le cas du dosage de l'oxygene dans onze matrices differentes, au moyen d'accelerateurs SAMES 150 et 300 kV. produisant les neutrons de 14 MeV par la reaction {sup 3}H (d, n) {sup 4}He. Des sensibilites de dosage ont egalement ete etudiees pour six autres elements. Les resultats obtenus montrent que, pour un flux de neutrons de 10{sup 10} n /4{pi}, les sensibilites varient entre 100 {mu}g et 1 mg, pour l'oxygene dans neuf matrices (Be, Ta, Nb, Ti, Zr, Fe, Al, Sb, Si) et qu'il est possible de doser les six elements F, B, Y, Si, N, Al avec des sensibilites se situant entre 1 et 1000 microgrammes. (auteurs)

  4. The public expenditure for the research and development on the energy in France. Synthesis of the study realized for the energy observatory; Les depenses publiques de recherche et developpement sur l'energie en France. Synthese de l'etude realisee a la demande de l'Observatoire de l'energie

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    The aim of this study is to provide a fine photography of the public expenditure on the energy, following the IEA format. This synthesis presents the study methodology and data on the expenditure in function of years 2002 to 2005. The repartition of the public expenditure by categories, by financing origin, and by the different sources or energy, are presented. (A.L.B.)

  5. Modélisation, conception et expérimentation d'un véhicule hybride léger pour usages urbains

    OpenAIRE

    Loukakou Bounzeki Mbemba , Destiny Conscience Eland

    2012-01-01

    The exhaustion, increased cost and location of fossil fuels on the one hand, and the environmental problems caused by emissions of CO2 in the atmosphere on the other hand, are forcing many automotive manufactures to develop major research programs in the designof electric vehicles and hybrid electric. In this context, this thesis aims to test the feasibility ofan innovative hybrid drivetrain consisting of a vehicle from existing heat and reduce engine power while adding motors integrated into...

  6. Modélisation, Conception et Expérimentation d'un véhicule hybride léger pour usages urbains

    OpenAIRE

    Loukakou , Destiny; Espanet , Christophe; Dubas , Frédéric

    2012-01-01

    The exhaustion, increased cost and location of fossil fuels on the one hand, and the environmental problems caused by emissions of CO2 in the atmosphere on the other hand, are forcing many automotive manufactures to develop major research programs in the design of electric vehicles and hybrid electric. In this context, this thesis aims to test the feasibility of an innovative hybrid drivetrain consisting of a vehicle from existing heat and reduce engine power while adding motors integrated in...

  7. Conception et exploitation d'une sonde électronique d'auscultation des réseaux d'assainissement urbains non visitables

    OpenAIRE

    Bedrani , Mourad

    1983-01-01

    Partant de l'hypothèse que, d'une part, aucun rejet ne peut se trouver à une température rigoureusement identique à celle des eaux drainées dans le réseau, et que, d'autre part, la température de la nappe phréatique est systématiquement plus basse que celle de différents rejets domestiques ou industriels, nous avons conçu une sonde autonome à double paramètre : température et conductivité, baptisée Ichtyotherme, pour l'auscultation des réseaux. L'appareil développé est couplé à un microordina...

  8. Identités urbaines et usages sociaux de la « frontière » à Constantine (xviiie siècle)

    OpenAIRE

    Grangaud, Isabelle

    2014-01-01

    À l’époque coloniale, puis aux lendemains des indépendances, le thème du rapport ville/campagne sur le terrain maghrébin a été appréhendé tant par les historiens que par l’ensemble des chercheurs en sciences sociales de différentes façons et selon une gamme de points de vue très variée, voire contradictoire, depuis la vision d’une opposition irréductible entre ces deux espaces (où joueraient des critères structurels d’ordre économique et civilisationnel) jusqu’à celle, à l’inverse, d’une comp...

  9. Caractérisation de la croissance spatiale urbaine de la ville de Lubumbashi (Haut-Katanga, R.D. Congo entre 1989 et 2014

    Directory of Open Access Journals (Sweden)

    Sikuzani, YU.

    2018-01-01

    Full Text Available Characterization of the Spatial Urban Growth of the city of Lubumbashi (Haut-Katanga, D.R. Congo between 1989 and 2014. A quantification of the spatio-temporal dynamics of urbanization is crucial to apprehend urban morphology and its ecological effects, in order to support sustainable urban planning. This study aimed at understanding the spatial urban growth of Lubumbashi city based on the analysis of six SPOT satellites images. With the exception of the 1996-2002 period, Lubumbashi city underwent a high average annual growth rate exceeding that observed for other cities in sub-Saharan Africa. Between 1989 and 2014, the built-up percentage increased from 6 % to 20 %. Our results suggest that the urbanization of Lubumbashi city followed a complex diffusion-coalescence model. The main reason of this perturbation is the combination of the rapid demographic growth with an inappropriate urban growth management.

  10. Realité urbaine et planification – Cas du P.O.S.(Hammam Dalaa – M Sila – Algérie

    Directory of Open Access Journals (Sweden)

    L. FELOUSSIA

    2013-10-01

    Full Text Available The purpose of this study is to better understand t he incompatibility between the urban phenomenon in Algeria, and the physical and socio-e conomic city as "urban reality" through the case study of land use plan "L.U.P." said " Hammam Dalaa Road " to M'sila. We treat the context of the urban phenomenon locally, taking as an examp le the city of M'sila. The work will therefore, in terms of land use, its contents and the changes it undergoes during its application. After a critical study on the plan of land entitle d "Hammam Dala Road", by observation field, to better understand the urban phenomenon, a nd see the continuing evolution of urban space, we will make Comparison of the first urban project, as a graphic document, and (urban reality. We found that there are changes in use of land which creates a conflict with the recommendations of the "L.U.P.". This has lead to that, specializat ion areas have not been respected at the city of M'sila, and that the areas allocated to activities or habitat no longer play their role. This article presents a first step in the land use plan, and then it will focus on the mismatch between the "L.U.P.", and the urban reality

  11. The anaerobic digestion of urban sludges: evaluation, state of the art; La digestion anaerobie des boues urbaines: etat des lieux, etat de l'art

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    This presentation brings an evaluation and a state of the art of the sewage sludges channel, in terms of de-pollution efficiency as energy production. It gives also economical references which allow long dated arbitration. These data underline the necessity of taking into account the investments, the operating costs and also the induced profits: sludges volume reduction and the associated charges, complete or part energy autonomy... (A.L.B.)

  12. INTEGRATION DU SIG ET DE L’ANALYSE HIERARCHIQUE MULTICRITERE POUR L’AIDE DANS LA PLANIFICATION URBAINE : ETUDE DE CAS DE LA PROVINCE DE KHEMISSET, MAROC

    Directory of Open Access Journals (Sweden)

    Sidi Mohamed

    2017-01-01

    Full Text Available Mejorar el conocimiento del proceso de programación de los recursos de tierra por el uso de la urbanización es e l objeto de este trabajo. Esto a través de la presenta ción de un modelo basado sobre la utilización c ombinada del análisis jerárquico multicrite rio (AHP en un lado, y de otro lado de las sistemas de información geográfica (GIS. L a metodología elegida ha mostrado su pe rtenencia en la resolución de lo s proble mas espaciales complejos. La determinación de los criterios relacionados con el objetivo y la distribución de los atributos y los datos geográficos a nivel de la provincia de Khémisset ha permitido, en primer lugar, a priorizar los indicadores, en segundo lugar, a evaluar el fenómeno , y tercero , a comparar diferentes escenarios de gestión del área del estudio. Esta cuantificación es el resultado de la intersección de los dat os y la agregación multicriterio según el método AHP y el enfoque de la suma pondera da (WSM modelando de manera participativa los factores dependientemente de sus pesos. El proceso adoptado ha ofrecido también la posibilidad de presentar en forma de Atlas la ocupación del sol destinado a la urbanización y ayudar a los especialistas a ele gir la vocación u rbanística de los espacios, abrirlos para la urbanización, preservarlos o conservarlos .

  13. 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.

  14. Les nouvelles perspectives d'analyse spatiale des nuisances sonores. Le projet SIGAUR (Système d'Information Géographique et Acoustique URbaine

    Directory of Open Access Journals (Sweden)

    Erwan Quesseveur

    1999-06-01

    Full Text Available Ce rapport présente un projet de recherche sur l’intégration d’une couche d’information de nuisances acoustiques dans un système d’information géographique.Après un développement sur l’état de la pollution et des moyens aujourd’hui en vigueur pour la combattre, on va montrer les nouvelles perspectives offertes pour l’analyse spatiale du bruit. En confrontant cette nuisance aux enjeux du territoire, elle peut devenir un véritable critère de décision en aménagement du territoire.Ce projet résulte d’une collaboration entre le Centre Scientifique et Technique du Bâtiment C.S.T.B. et l’équipe " S.I.G. " de l'Institut de Géographie Alpine (IGA

  15. Planifier et choisir un itinéraire en milieu urbain : approches plurielles d'un problème cognitif.

    OpenAIRE

    GRISON, Elise

    2015-01-01

    Route planning is an everyday task performed when we want to travel. Even though it is a routine task, researches in problem-solving and spatial cognition domains have revealed that various strategies and cognitive resources are involved (e.g. working memory, spatial abilities, and executive functions). Some models have been proposed to explain the formation of travel plans. They usually describe the planning process into different stages with or without competition between strategies (Cuntin...

  16. Delincuencia urbana y victimización de las víctimas/ Délinquance urbaine et victimisation/ Urban delinquency and victimisation

    Directory of Open Access Journals (Sweden)

    Zaffaroni E. R.

    2008-12-01

    Full Text Available The world’s population and citizen’s lives are meanly concentrated in cities, so also the criminality is located there. Mass media influence this type of crimes and built a reality of urban delinquency.Legislators, the executive power and politicians reply not to real events, but to news as described by mass media, because this is what the public opinion is. The punitive power is characterized by the victim’s exploitation (expropriation, depersonalization.To resolve this situation, the central State has tried to care for victims’ psychic damages and so it has extended the concept of “victim” to all his family. All the guidelines shoot for the victim’s psychic health and his or her recovery, in particular the process of recovering from a loss. When this processing ends, the risk of tension’s amassing increases and it may turns into a psychic pathology.The mass media shows only a few victims, whereas the other one goes ignored (they became invisible. This victims become heroes. Journalists and performers instigate this victims to talk about their emotions and feelings like a criminologists or a criminal lawyer. These opinions are understood (and perceived like a scientific truth by mass media’s insiders. The audience may identify itself with the victims if they have distinctive features (for example language, culture,…. Traumatized victims blame the government and their preventive and repressive ineffectiveness. Politics try to search for a solution about the reality “built” by mass media and victim/hero’s opinions, in fact this reality doesn’t coincide with the urban delinquency.The victim/hero ruin the legislation in South America, where in some countries (like Argentina and Brazil there isn’t a criminal jurisdiction, but only inconsistent and contradictory lows. The concept of victim/hero needs more research, also by comparing different national experiences.This article speaks about the comparison between two different crimes (kidnapping which happened in Argentina; they are similar because the crime’s feature and mass media manipulation, but they differ in stretch and political context. These two kidnappings caused the hostages’ death: the first, the Ayerza case, happened in 1932-1933, the second happened in 2004.The two episodes are similar because: 1 the victim was a young University student; 2 he comes from a family that had an high social position; 3 Right Wing political ideals; 4 mass media presence during the time; 5 the general demand for more authority repression; 6 a plan about a criminal jurisdiction reform; 7 the crimes’ perpetrators were punished; 8 the coincidence between crimes and economic crisis. The first crime, Ayerza, is about a kidnapping which happened on the 25 of October 1933. The body was found on the 21 of February 1933. In Argentina at the time there was a complex economic crisis and also a military dictatorship. The victim was a young University student, his family had an high social position and he was a member of the local fascist movement (Legión Cívica.The Conservative Government was accused of complicity, the people asked for more severe punishment, Legión Cívica’s militants asserted their selves, revenge was promised and the death penalty was requested. Two months later, criminals, that belonged to an Italian gang (Galiffi’s Gang, were arrested.The kidnappers’ political identity was known, so the victim’s political organization exalted nationalism and delivered speeches about foreign criminals.The executive power reacted by suggesting repressive reforms in Penal Code, but it never passed on because the Senate did not approved it.In 2004, the social and historical context and the consequences were different because of the “victim/hero phenomenon”. Besides, the political situation was dissimilar because there were free and fair elections.Mass media attention shifted when the body was found from the victim to his father who assumed the major role of the new victim.Father and son did not belong to a political party, this is an important difference in comparison with the other event. The father surrounded himself with consultants linked to the dictatorship in 1976-1983, or to the corrupt political control in 1989-1999.At the beginning, the victim/hero had an ample support, but little by little the attention stopped because mass media’s directors refused to help him; the victim/hero, also, made a lot of political mistakes. The political power did not present any reforms in Penal Code. The victim’s father suggested reforms to the Congress worked out by his collaborators. He received proposals by politicians to become a candidate, but during the time he disappeared.So, the victim/hero “construction” may destabilize democratic state institutions by introducing values contrary to solidarity, equality, freedom, democracy. The democratic institutions have lost their faculties of reaction and defence and they resigned their self to victim/hero’s threats. It is a new phenomenon that cause problems in criminal jurisdiction and in criminal policy, but it sacrifices victim’s mental health.Summarizing:- an handling made by victims through their role of heroes is increasing;- this handling could put in danger the State;- the communication causes a momentary relief for the victim, but it could provoke a new victimization.

  17. Le culte de Santa Librada à Sigüenza: Patronage urbain et emblématique impériale

    Directory of Open Access Journals (Sweden)

    Gélis, Jacques

    1996-06-01

    Full Text Available After the reconquest of Sigüenza in 1124, St. Librada became the town's patron saint. Legend has it that she was born out of a múltiple delivery and that, because of her christian faith, her father had her die together with her eight sisters. On the iconography of her martyrdom, one of the representations is that of the crucified «strong virgin»; the other, more conventional, is on a plateresque altarpiece which honors her memory in Sigüenza's cathedral, a donation by a bishop close to Charles V. Behind these representations lies the complex relationship among the saint, the town's inhabitants, the church and, beginning from the l6th century, the state. St. Librada was then associated with Hercules, Charles V's favorite hero, in the defense of the sovereign's political interests.Reconquistada Sigüenza en 1124, Santa Librada se constituye en patrona de la ciudad. La leyenda la hace renacer de un parto múltiple y morir con sus ocho hermanas, por voluntad de su padre, por ser cristiana. Dos son las iconografías existentes de su martirio, una es la de «virgen fuerte» crucificada, la otra con la palma; y un retablo plateresco, donación de un prelado próximo a Carlos V, celebra su memoria en la catedral seguntina. Detrás de estas representaciones, se adivina la compleja relación entre la protectora, los habitantes de la ciudad, la Iglesia y, a partir de comienzos del siglo XVI, el Estado. Santa Librada fue entonces relacionada con Hércules, el héroe predilecto de Carlos V, en defensa de los intereses políticos del soberano.

  18. COMPARATIVE PERFORMANCE OF SAND AND COCONUT SUBSTRATE IN URBAN WASTEWATER TREATMENT PERFORMANCES COMPAREES DU SABLE ET DU SUBSTRAT DE COCO EN TRAITEMENT D’EAUX RESIDUAIRES URBAINES

    Directory of Open Access Journals (Sweden)

    MARTINE KONE

    2015-05-01

    Full Text Available Urban wastewater has been treated by infiltration-percolation on sand and on coconut substrate, in order to highlight their comparative performance. The pilots were fed to the hydraulic loading rate of 40 L·m-2·d-1 during three days a week and kept at rest the next four days. Parameters are measured on an average sample of 24 hours taken on the output of each pilot at the end of the third day of treatment. The average removal efficiencies of chemical oxygen demand (COD were respectively, 94.8 and 39.61 % with the sand and the coconut substrate while the average yields of biochemical oxygen demand (BOD5 were 99.01 and 98.12 %. The results showed that the average removal efficiencies of fecal coliform bacteria were respectively, 98.8 and 91 %. Conductivities have increased by an average of 39.88 % with the sand and 4.65 % with coconut substrate.

  19. Le défi de l'hygiène dans les zones urbaines pauvres (Afrique de l'Est)

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

    L'Organisation mondiale de la santé (OMS) estime que l'amélioration de ... Sustainable Technologies, Gender Integration and Supportive Policy Framework ... Le Conseil des gouverneurs félicite Jean Lebel pour son nouveau mandat au ...

  20. Observation d'une flambée de trypanosomose équine due à Trypanosoma vivax en zone urbaine au Sénégal

    Directory of Open Access Journals (Sweden)

    Dehoux, JP.

    1996-01-01

    Full Text Available Observation of an Outbreak of Equine Trypanosomiasis due to Trypanosoma vivax in Urban Environment in Senegal. An outbreak of trypanosomiasis in imported and local horses and ponies occurred in September 1994 in a private horseriding farm near Dakar. Trypanosoma vivax was isolated. 5 mortalities (which a local pony were registered on 20 ill animals. The clinical signs were fever, depression, emaciation, anemia ad oedema. Curative treatment with intramuscular diminazene (3.5 mg/kg and prophylactic intravenous isometamidium (0.5 mg/kg were injected in October 1994 and July 1995. Glossina palpalis gambiensis was isolated near the farm.

  1. La mise en ordre écologique des parcs urbains. Savoirs, pratiques et paysages : Exemple d'un grand parc francilien

    OpenAIRE

    Legrand , Marine

    2015-01-01

    In France, local public authorities have taken a growing interest in ecological landscape management of urban parks and gardens since the 1980’s. It results in the emergence of a new landscape model that embodies the encounter between two tendencies in urban territories. First, the growing influence of biological sciences on urban planning through the “urban ecology” political horizon. Second, the enlargement of nature conservation policies, that starts to include ordinary nature and urban bi...

  2. Les lûkanda de Sanaa. Structures urbaines d'intégration sociale pour les travailleurs migrants ?

    Directory of Open Access Journals (Sweden)

    Vincent Martignon

    2003-01-01

    Full Text Available EMAM (URBAMA, CEFAS. Vincent Martignon prépare à l'EMAM un doctorat de géographie sous la direction de Pierre Signoles. « - Ce que je préfère, c'est la vieille ville, elle est ancienne. - Pourquoi est-ce important que ce soit ancien ? - Parce que c'est l'architecture du Yémen. - Cela ressemble un peu au village ? - Sanaa est la mère du Yémen, alors elle a des petits villages qui lui ressemblent. » (Extrait d'entretien dans une lûkanda de Sanaa, à l'extrémité sud de la rue de Hadda....

  3. Suivi et modélisation de la dynamique des cyanobactéries dans les lacs urbains au sein de leur bassin versant

    OpenAIRE

    Silva , Talita

    2014-01-01

    Urban lakes, often artificial, are fully integrated into the urban environment and perform several roles that are important for the sustainable functioning of cities. These ecosystems are strongly affected by human activities such as urbanization, land use changes and surface imperviousness which raise runoff in volume and speed, causing greater carrying capacity and greater pollutant load to aquatic receptors. Because of these anthropogenic activities, many lakes in the world are eutrophic a...

  4. Health impact of urban air pollution: the case of the metropolitan Paris area; Impact de la pollution urbaine sur la sante: le cas de la region parisienne

    Energy Technology Data Exchange (ETDEWEB)

    Myrto, V.; Menut, L. [Institut Pierre Simon Laplace, Lab. de Meteorologie Dynamique, CNRS UMR 8539, Ecole Polytechnique, 91 - Palaiseau (France); Chatignoux, E. [Observatoire Regional de la Sante d' Ile de France, 75 - Paris (France)

    2011-05-15

    Urban meteorology and atmospheric composition has become an issue of great public concern. Mega-cities are areas of great population density and also of high rates of gaseous and particulate matter emission. The health of the residents of such large agglomerations will potentially be influenced by the local air-pollution, its formation and dispersion. Efforts are made to link air-pollution and health. Several questions are open: what is the relative contribution of the ambient air-pollution compared to all other exposure factors? What is the 'real' level of exposure reaching the individuals of a population? Can we distinguish the health effects of multiple- pollutants? To answer to these questions we have developed a modeling framework that maps the exposure of the Parisian population to ozone, nitrogen dioxide and fine particles at hourly resolution. This integrated model incorporates a meteorological model, a three-dimensional Eulerian air-quality model and a human exposure module. The first results of this modeling effort suggest new epidemiological evidence of the relationship between ambient air pollution levels and mortality over the city of Paris. (authors)

  5. La traduction de l’innovation dans l’espace urbain en Amérique du Nord Urban Space and Innovation in North America

    Directory of Open Access Journals (Sweden)

    Laurence Gervais-Linon

    2009-10-01

    Full Text Available A certain number of issues related to the effects of technological and economic innovation on urban sociology have arisen in the United States. The spatial concentration of innovation activities in the US and in Canada has created a “geography of innovation”. Technological, but also social, artistic and cultural innovations can have repercussions on urban space. What is called innovation may be hard to define but its symptoms are usually found in big urban centers and allow certain regions to stand out. This paper proposes to study three important aspects of the effects of economic innovation on urban space: firstly, urban decline and reinvestment processes linked to the gentrification of inner-cities; secondly, the role played by new social classes arising from the transformation of the economy; and lastly, the concept of metropolisation related to the concentration of tertiary activities.

  6. La Fortification de Troyes en Champagne. Un grand chantier urbain Fin XVe–première moitié du XVIe siècle

    Directory of Open Access Journals (Sweden)

    Brice Collet

    2011-05-01

    Full Text Available Composition du JuryMonsieur Patrick Boucheron, maître de conférence à l’Université de Paris I,Madame Odette Chapelot, maître de conférence à l’ÉHESS,Monsieur Jean Chapelot, directeur de recherche au CNRS (directeur de la thèse,Monsieur Nicolas Faucherre, professeur à l’Université de Nantes,Monsieur Etienne Hamon, professeur à l’Université de Picardie–Jules Verne,Monsieur Pierre Monnet, directeur d’études à l’ÉHESS.Thèse soutenue le 16 décembre 2010RésuméIl ne reste actuellement plus rien ou ...

  7. Compostage et qualité du compost de déchets urbains solides de la ville de Bobo-Dioulasso, Burkina Faso

    Directory of Open Access Journals (Sweden)

    Compaoré, E.

    2010-01-01

    Full Text Available Composting and Compost Quality of Urban Solid Wastes in Bobo-Dioulasso Town, Burkina Faso. A study of urban solid wastes composting was conducted to evaluate wastes compost quality. Wastes of municipal dumps of Bobo-Dioulasso have been collected, separated and composted with cow manure, grass and Kodjari phosphate rock. During composting the pH increased up to 8.6, the moisture up to 68% and the temperature up to 65 °C before decreasing and then stabilizing at 7.1; 30% and 31 °C respectively. Particle size distribution of composts showed that the fraction ≤ 2 mm is dominant, about 65%. The organic matter, C, N, P and K contents of the composts are acceptable but the C/N ratio was relatively low in comparison with international standard. The heavy metals (Cu, Pb, Ni and Zn contents in composted urban wastes were relatively high with higher content of Zn and Pb. The compost obtained was of good quality and the addition of Kodjari phosphate rock enhanced this quality.

  8. Dessertes TGV et tourismes urbain et d’affaires : entre attentes dans les villes de France et renforcement de la double centralité parisienne

    OpenAIRE

    Delaplace , Marie; Perrin , Julie

    2014-01-01

    International audience; In France, the expansion of High‐Speed Rail (HSR) makes cities expecting positive effects in terms of urban and business tourism development. Given that these forms of tourism are characterised by shorter stays, they could benefit from HSR services, whenever necessary facilities and amenities are present. But these expectations are based on the implicit and systematic assumption that HSR service could favour the tourism development in regional French cities by drawing ...

  9. District heating in Lyons: self-monitoring and administrative control; Chauffage urbain de Lyon: autosurveillance et controle de l`Administration

    Energy Technology Data Exchange (ETDEWEB)

    Lartigue, D. [SLEC / PRODITH, 69 - Lyon (France)

    1996-12-31

    The district heat and cold system of Lyon city (France) is presented, with emphasis on the environmental performances of its boiler, burner and dust cleaning systems. Pollutant emissions are continuously monitored, controlled and regulated: the sensing and monitoring system is described together with the data acquisition and processing systems, allowing for a real time control of the plants and the whole heating system. Relations with the local administration and audits for ISO 14000 certification are also discussed

  10. Le silenciement urbain, ou le silence du ciment. Lire Moi non de Patrick Goujon The Silence of Cement, or Reading Patrick Goujon’s Moi non

    Directory of Open Access Journals (Sweden)

    Claudia Bouliane

    2009-04-01

    Full Text Available Au cours des dernières années, plusieurs romanciers français ont tenté de dépeindre les habitus et les formes de socialisation des jeunes des banlieues. La présente étude porte sur les représentations de l’espace périurbain dans le roman Moi non de Patrick Goujon, œuvre exemplaire de la volonté de donner une valeur symbolique à la vie de ces jeunes. Le roman se présente comme une réévaluation critique des clichés généralement accolés à la banlieue. Pourtant, Moi non propose une lecture ambiguë des alternatives de mobilité sociale offertes aux jeunes des banlieues et des formes de sociabilité qui leur sont propres ; sans les condamner à l’avance, Goujon montre qu’elles tendent à reproduire le schéma tracé par la doxa.Several French novelists have attempted in recent years to portray inner-city youths’ habits and forms of socialization. This study focuses on the representations of inner-city space in Patrick Goujon’s novel Moi non, a novel that epitomizes the desire to give symbolic value to the lives of inner-city youths. The novel presents itself as a critical reassessment of the stereotypes usually associated with inner cities. However, Moi non proposes an ambiguous reading of the forms both of social mobility offered inner-city youths and of their socialization. Without condemning them beforehand, Goujon shows they tend to reproduce the pattern traced by the doxa.

  11. Brooklyn et "ses" Dodgers. Base-ball et construction des identités urbaines aux Etats-Unis, une sociohistoire (1883-1957)

    OpenAIRE

    Marquis , Peter

    2009-01-01

    From the 1880s onwards, baseball has played a considerable role in the shaping of urban cultures in the United States. The Dodgers, a professional team based in the New York borough of Brooklyn, provide a remarkable illustration of the rarely studied interaction between urban identities, people's passion for sports, and the history of entertainment businesses. From their birth in 1883 to their much-contested move to Los Angeles in 1957, the Dodgers have established themselves as Brooklyn's ho...

  12. Renewable energy in urban areas. The future has already begun; Energies renouvelables en milieu urbain. Le futur, c'est deja maintenant

    Energy Technology Data Exchange (ETDEWEB)

    Magnin, G.

    1999-10-01

    Renewable energy is still often presented as the energy of tomorrow or the day after tomorrow. It is true: 6% of the European energy total is still too little. But, 6% is not something to be sneezed at either. The White Paper fixed the ambitious objective of 12% in 2010 and initiatives are flourishing. These initiatives are far from coming exclusively from the countryside, where local resources (biomass, small-scale hydro power, etc.) or space (wind energy) are to be found. Urban areas, which have to meet higher energy requirements, often have district heating working on biomass and geothermal energy, biogas produced from sewage treatment plants and used as bus fuel, building roofs fitted for thermal and photovoltaic solar collectors or rivers running through the city. Encouraging examples will be find in this special issue dedicated to ''renewable''. (author)

  13. SIMULATIONS NUMERIQUES DE L'ATMOSPHERE URBAINE AVEC LE MODELE SUBMESO :
    APPLICATION A LA CAMPAGNE CLU-ESCOMPTE SUR L'AGGLOMERATION DE MARSEILLE

    OpenAIRE

    Leroyer , Sylvie

    2006-01-01

    In view of understanding and forecasting pollutant dispersion in urban areas, high resolution numerical simulations are performed. The aim is to reproduce atmospheric characteristics above complex urbanised site. An accurate method is developed to implement numerical simulations of the urban atmosphere based on three complementary tools, optimized on Marseille agglomeration example: the atmospheric Large Eddy Simulation model SUBMESO and the soil model for sub-meso scales, urban, SM2-U, and t...

  14. Pratiques foncières à l'ombre du droit : l'application du droit foncier urbain à Ziguinchor, Sénégal

    NARCIS (Netherlands)

    Hesseling, G.S.C.M.

    1992-01-01

    Dans cette étude l'auteur analyse les problèmes liés à l'application du droit foncier dans la ville de Ziguinchor, capitale de la région méridionale du Sénégal. Le titre de cet ouvrage évoque les pratiques foncières de tous les acteurs: l'État (composé de différents groupes, tendances, fractions) et

  15. La valorisation du végétal dans la trajectoire de mutation des friches urbaines : une approche socio-environnementale

    OpenAIRE

    Anquetil , Virginie

    2016-01-01

    Urban brownfields and other derelict lands are resources for cities development and densification. Some of them may be colonized by spontaneous vegetation. Particular brownfield redevelopment projects take advantage of this vegetation by preserving and integrating it into the master plan. Could the persistence of this vegetation be the key to understand the socio-spatial and environmental functioning of newly-created public spaces? We carried out a comprehensive evaluation of three revevelopm...

  16. LA CONFIGURATION/ LA RECONFIGURATION DE L’IMAGE URBAINE DANS LA CONCURRENCE INTERURBAINE. LE CAS DES VILLES DE BRAȘOV ET DE CONSTANȚA

    Directory of Open Access Journals (Sweden)

    Teodora Mădălina PAFTALĂ

    2013-11-01

    Full Text Available In the context of increasingly accentuated globalization, the present cities are forced, in an elegant manner, to act individually in order to ensure economic, social and cultural development. Cities constantly compete with each other, seeking to identify, develop and value their comparative and competitive advantages to attract attention on them. A healthy urban management and brand strategy of place realistic and updated continuously can induce a high degree of attraction, with positive implications on the dynamics of space within the city. Interurban competition may take place at many levels (economic, social and cultural but, whatever its nature, seeks to attract funds for city development and improving quality of life of citizens. Towns are required to reinvent itself, but very few modern cities manage to assert their own culture to create a distinct image, personal, able to represent and promote the city among tourists, residents or investors. Deprived of vision, experience and inspiration, most cities manage just to copy each other, in terms of the image they displayed. The image influences the behavior of individuals to a certain place, with important implications for the territorial mobility in the city. The article is structured in two parts: a first part theoretical where are presented and defined the concepts as well as relations between them, to which is added an applicative part, which assesses and analyzes the image of the Municipality of Bra ș ov and Constan ț a, from the perspective of residents of two cities. The image that the residents have of their city should be similar to, at least broadly, the image that promotes the city, because a false image promoted leads to decreased interest and confidence in the product of potential buyers, in this case, this ones being identified with the urban space.

  17. Atmospheric sulfur and climate changes: a modelling study at mid and high-southern latitudes; Soufre atmospherique et changements climatiques: une etude de modelisation pour les moyennes et hautes latitudes Sud

    Energy Technology Data Exchange (ETDEWEB)

    Castebrunet, H

    2007-09-15

    The mid and high-southern latitudes are still marginally affected by anthropogenic sulfur emissions. They are the only regions in the world where the natural cycle of the atmospheric sulfur may still be observed. Sulfur aerosols are well-known for their radiative impact, and thus interact with climate. Climate can in turn affect atmospheric sulfur sources, distribution and chemistry. Antarctic ice cores provide information on the evolution of climate and sulfur deposition at the surface of the ice sheet at glacial-interglacial time scales. The aim of this thesis is to develop and use modeling towards a better understanding of the atmospheric sulfur cycle in antarctic and sub-antarctic regions. Ice core data are used to validate model results under glacial climate conditions. An Atmospheric General Circulation Model (AGCM) coupled to a sulfur chemistry module is used: the LMD-ZTSulfur model, version 4. An update of both the physical and chemical parts of the model. The model was first performed. The impact of there changes on modelled sulfur cycle are evaluated for modern climate. Further, boundary conditions are adapted to simulate the atmospheric circulation and sulfur cycle at the Last Glacial Maximum, approximately 20,000 years ago. In the model, sulfur is found to be highly sensitive to antarctic sea-ice coverage, which is still poorly known during the ice age. An original dataset of ice-age sea-ice coverage was developed. Its impact on the oceanic emissions of dimethyl sulfide, main precursor of sulfur aerosols at high-southern latitudes, is discussed. Using the same oceanic sulfur reservoirs as for present day climate, the model broadly reproduces the glacial deposits of sulfur aerosols on the Antarctic plateau, suggesting little impact of climate on oceanic sulfur production in the Antarctic region. Sensitivity tests were carried out to draw an up-to-date status of major uncertainties and difficulties facing future progress in understanding atmospheric sulfur and climate. (author)

  18. Study and management of atmospheric exhaust gas in acetic acid fermentation developing a new process for alcohol vinegar production; Etude et maitrise des rejets atmospheriques en vinaigrerie, developpement d'un procede nouveau de conduite de la fermentation acetique

    Energy Technology Data Exchange (ETDEWEB)

    Pochat Bohatier, C

    1999-12-06

    The aim of the study was to examine emissions of volatile organic compounds (VOCs) during acetic (acid) fermentation. The first part of the study presents the methodology developed to reproduce production cycles for spirit vinegar and to analyse gas effluents. The second part describes the origin and quantification of the emissions (ethanol, acetic acid, acetaldehyde and ethyl acetate). The acetic acid is produced by bacterial metabolism while the ethyl acetate is a result of the chemical reaction of esterification. By modelling the emissions during batch processing we were able to identify the various parameters involved when VOCs are carried along by the fermentation gases. The quantities of ethyl acetate depend on the length of time the diluted alcohol is stored, and on its composition. By using a fed-batch method with a continuous supply of ethanol we could reduce alcohol emissions. The third part of the study develops the kinetics studies carried out to adapt the fed-batch process to acetic acid fermentation. The influence of ethanol, either in terms of deficiency or inhibition, is minimized between 8 and 16 g.1-1. A study of the growth rate of bacteria in relation to the amount of acetic acid showed that the latter was highly inhibitive. There is a critical concentration of acetic acid at which the growth of bacteria stops, and the death rate of the culture increases rapidly. The latter depends on the composition of the culture's medium; the corresponding pH of the concentration is between 2.25 and 2.28. By limiting the formation of ethyl acetate in the diluted alcohol and by controlling the concentration of ethanol at 16 g.l -1 per fermentation, the VOC emissions are reduced by 30% and the yield increases as a result. (author)

  19. Effects of atmospheric fallouts of sulfur and nitrogen on soils and fresh waters in France; Effets des depots atmospheriques de soufre et d'azote sur les sols et les eaux douces en France

    Energy Technology Data Exchange (ETDEWEB)

    Le Gall, A.Ch.

    2004-11-15

    The sulfur oxides, nitrogen oxides, the ammonia and the chlorine emitted in the environment by human activities contribute to the soils and waters acidity. After a presentation of the acidification and the eutrophication, the author describes and qualifies the mechanisms. In a second part she discusses the mathematical models of the acidification and the eutrophication, the biological criteria and the uncertainties. The last part presents the french situation and general recommendations on land restoration. (A.L.B.)

  20. Lichens and air pollution: effect of SO'' on the growth of Hypogymnia physodes (L. ) Nyl. Lichens et pollution atmospherique: l'effet du SO/sub 2/ sur les soredies k Hypogymnia physodes (l. ) Nyl

    Energy Technology Data Exchange (ETDEWEB)

    Margot, J

    1972-01-01

    Experiments were performed to determine the relative susceptibility of lichens to the effect of sulfur dioxide. Attention was focused on Hypogymnia physodes, with brief studies on several other species. Evernia prunastri and Parmeliopsis ambigua were more sensitive to sulfur dioxide than Hypogymnia physodes. 145 references, 33 figures, 43 tables.

  1. Toward an estimation of daily european CO{sub 2} fluxes at high spatial resolution by inversion of atmospheric transport; Vers une estimation des flux de CO{sub 2} journaliers europeens a haute resolution par inversion du transport atmospherique

    Energy Technology Data Exchange (ETDEWEB)

    Carouge, C

    2006-04-15

    Since the end of the 1980's, measurements of atmospheric carbon dioxide have been used to estimate global and regional fluxes of CO{sub 2}. This is possible because CO{sub 2} concentration variation is directly linked to flux variation by atmospheric transport. We can find the spatial and temporal distribution of fluxes from concentration measurements by 'inverting' the atmospheric transport. Until recently, most CO{sub 2} inversions have used monthly mean CO{sub 2} atmospheric concentration measurements to infer monthly fluxes. Considering the sparseness of the global CO{sub 2} measurement network, fluxes were a priori aggregated on sub-continental regions and distributed on a fixed spatial pattern within these regions. Only one flux coefficient per month for each region was optimized. With this strong constraint, estimated fluxes can be biased by non-perfect distribution of fluxes within each region (aggregation error). Therefore, flux estimation at model resolution is being developed where the hard constraint of a fixed distribution within a region is replaced by a soft constraint of covariances between flux uncertainties. The use of continuous observations from an increasing number of measurement sites offers a new challenge for inverse modelers. We investigate the use of daily averaged observations to infer daily CO{sub 2} fluxes at model resolution over Europe. We have developed a global synthesis Bayesian inversion to invert daily fluxes at model resolution (50 x 50 km over Europe) from daily averaged CO{sub 2} concentrations. We have obtained estimated fluxes for the year 2001 over Europe using the 10 European continuous sites from the AEROCARB network. The global atmospheric model LMDZt is used with a nested grid over Europe. It is necessary to add a priori spatial and temporal correlations between flux errors to constrain the Bayesian inversion. We present the impact on estimated fluxes of three different spatial correlations based on distance between pixels, climate and vegetation distribution over Europe. To study the potential of this method, we used synthetic data generated from forward simulations of LMDZt (driven by flux fields generated from the biosphere model ORCHIDEE). We have found that the current network is not dense enough to constrain fluxes at model resolution. However, fluxes that are aggregated spatially over a region of 850 x 850 km in the Western Europe and temporally over 8-10 days compare very well with the ORCHIDEE fluxes. Preliminary inversion results using real data indicate that synoptic variations of estimated fluxes are in phase with the variations of the ORCHIDEE biosphere model flux and the variations observed in atmospheric concentrations. However, the quality of the flux estimates are highly dependant on transport model errors and in particular, on the quality of modelling small scale transport. Moreover, fossil fuel emissions are prescribed in this inverse model and the quality of their distribution is shown to be crucial. Data selection also has a large impact on estimated fluxes. The use of the daytime only data to calculate daily averaged concentrations greatly improves the estimated fluxes by reducing bias inferred from model transport errors. (author)

  2. Study of short time effect on health of a local air pollution source. Epidemiological approach; Etude des effets a court terme sur la sante d'une source locale de pollution atmospherique. Approche epidemiologique

    Energy Technology Data Exchange (ETDEWEB)

    Guzzo, J.Ch. [Institut National de Veille Sanitaire, Reseau National de Sante Publique, 94 - Saint-Maurice (France)

    2000-07-01

    This document applies to health professionals who are facing with a problem of risks evaluation relative to a local source of air pollution and envisage to realize an epidemiological study. In this document, only the short term effects are considered and the situations of accidental pollution are not treated. Without being a methodological treatise it can be a tool to better understand the constraints and the limits of epidemiology to answer the difficult question of the impact evaluation on health of populations living near a local source of air pollution. (N.C.)

  3. Study of the coastal atmospheric boundary layer during ESCOMPTE 2001. Evaluation and improvement of the efficiency of a UHF radar; Etude de la couche limite atmospherique cotiere durant ESCOMPTE 2001. Evaluation et amelioration des performances d'un radar UHF

    Energy Technology Data Exchange (ETDEWEB)

    Puygrenier, V

    2005-12-15

    Forecasting of pollution events was the main objective of the ESCOMPTE-2001 campaign, which took place in the Marseille/Fos/Berre heterogeneous area (southeastern France) in the early summer 2001. This goal requires good understanding and taking into account, by physico-chemical numerical models, of the physical processes in the Atmospheric Boundary Layer (ABL), in which pollutants are emitted, transported and diffused. In the ESCOMPTE-2001 campaign context, this work was devoted to study the low troposphere during sea breeze events, related to meteorological conditions responsible for poor air quality of coastal areas. It presents notably an oscillation of the sea breeze intensity and competitions of locals and regional sea breeze, which change the advective time of the marine air above the continental surface and thus influence the ABL development and its pollutants concentration. This study is based principally on the network of four UHF wind profilers radars set up on the coastal area of Marseille/Fos/Berre, allowing a continuous three-dimensional description of the sea breeze flow and the ABL. For the needs of this phenomenological work, methodological developments was realized to improve the measurement of ABL turbulent properties with UHF radars (terms of turbulent kinetic energy budget) and the use of wind profilers network for the study of pollutants plumes trajectory-graphy. (author)

  4. Inverse modeling for the optimization of primary sources of atmospheric pollution at a regional scale; Modelisation inverse pour l'optimisation des sources primaires de pollution atmospherique a l'echelle regionale

    Energy Technology Data Exchange (ETDEWEB)

    Pison, I

    2005-12-15

    Atmospheric pollution at a regional scale is the result of various interacting processes: emissions, chemistry, transport, mixing and deposition of gaseous species. The forecast of air quality is then performed by models, in which the emissions are taken into account through inventories. The simulated pollutant concentrations depend highly on the emissions that are used. Now inventories that represent them have large uncertainties. Since it would be difficult today to improve their building methodologies, there remains the possibility of adding information to existing inventories. The optimization of emissions uses the information that is available in measurements to get the inventory that minimizes the difference between simulated and measured concentrations. A method for the inversion of anthropogenic emissions at a regional scale, using network measurements and based on the CHIMERE model and its adjoint, was developed and validated. A kriging technique allows us to optimize the use of the information available in the concentration space. Repeated kriging-optimization cycles increase the quality of the results. A dynamical spatial aggregation technique makes it possible to further reduce the size of the problem. The NO{sub x} emissions from the inventory elaborated by AIRPARIF for the Paris area were inverted during the summers of 1998 and 1999, the events of the ESQUIF campaign being studied in detail. The optimization reduces large differences between simulated and measured concentrations. Generally, however, the confidence level of the results decreases with the density of the measurement network. Therefore, the results with the higher confidence level correspond to the most intense emission fluxes of the Paris area. On the whole domain, the corrections to the average emitted mass and to the matching time profiles are consistent with the estimate of 15% obtained during the ESQUIF campaign. (author)

  5. The multimedia models for the evaluation of exposure bond to the atmospheric emissions of classified installations; Les modeles multimedia pour l'evaluation des expositions liees aux emissions atmospheriques des installations classees

    Energy Technology Data Exchange (ETDEWEB)

    Bonnard, R

    2001-12-15

    Risk assessment and environmental impacts studies are realized to preserve the public health. Today one of the most used approach is the use of an atmospheric dispersion model to assess the risks. The data are then injected in a calculation software of exposure bond to polluted soils, to evaluate the risks of non direct exposure. This report details and evaluates the models corresponding to the need: the methodology for assessing Health Risks associated with multiple pathways of exposure to combustor, human health risk assessment proto col for hazardous waste combustion facilities, EUSES, CALTOX, MEPAS, MEND-TOX, RESRAD, MMSOILS, FRAMES-HWIR, PC-GEMS and TRIM. (A.L.B.)

  6. Characterization of the atmospheric pollution level in Sfax (Tunisia): influence of sources and meteorological factors; Caracterisation du niveau de pollution atmospherique dans la ville de Sfax (Tunisie): influence des sources et des facteurs meteorologiques

    Energy Technology Data Exchange (ETDEWEB)

    Azri, Ch.; Maalej, A.; Medhioub, K. [Ecole Nationale d' ingenieurs de Sfax, Unite de Recherche Etude et Gestion des Environnements Cotiers et Urbains (Tunisia); Tlili, A. [Faculte des Sciences de Sfax, Dept. de Geologie (Tunisia)

    2002-01-01

    This study held in Sfax City (Tunisia), showed that the atmospheric pollution level is strongly influenced by industrial sources, obstacles and meteorological factors. The factory of phosphate treatment 'SIAPE' displayed the main polluting source in the City. It is the principal issuing of SO{sub x} and toxic metals. The phosphogypsum deposit displayed an obstacle to the atmospheric diffusion of pollutants. Their stagnation is accentuated under smoky conditions. Several episodes of SO{sub 2} and dust are attributed to the effect of marked thermal inversions and the sirocco wind. The limited influence of traffic was proved by the registration of NO{sub x}, which showed low concentrations. It is conditioned by the change of fashion life of people and their customs of work (Ramadan month, agricultural activities). As a result, the adequate treatment of atmospheric industrial emanations (notably those of SIAPE) and the evacuation of artificial obstacles have to be considered. (authors)

  7. Opinions and attitudes on the wastes management, the eco-products consumption and the atmospheric pollution; Opinions et attitudes sur la gestion des dechets, sur la consommation des eco-produits et sur la pollution atmospherique

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    This document presents the results of the inquiry on the ''way of life and french aspiration'' concerning the energy. The inquiry was realized at the beginning of 2001 on a sample of 2000 people. The questions dealt with the three following topics: the french attitude facing the atmospheric pollution, consumption and the environment preservation, the opinion on the wastes management. (A.L.B.)

  8. Atmospheric pollution, eco-products, wastes management: some opinions and attitudes at the beginning of 2002; Pollution atmospherique, eco-produits, gestion des dechets: quelques opinions et attitudes au debut 2002

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    This document presents the results (statistical data) to the questions asked by the ADEME in the inquiry of the CREDOC concerning the ''French way of life and aspirations'' and realized in the beginning of the year 2002. The questions dealt with the following five topics: the french attitude facing the atmospheric pollution; the renouncing of the vehicle during the days of high urban pollution; the French and the remote-working; the consumption and the environment control. (A.L.B.)

  9. Detection, in real time, of metallic pollutants present in the industrial atmospheric effluents by inductively coupled plasma torch; Detection, en temps reel, d'elements metalliques presents dans les rejets atmospheriques industriels par torche a plasma a couplage inductif

    Energy Technology Data Exchange (ETDEWEB)

    Vacher, D.

    2001-12-15

    This work is devoted to the development of a process of detection in real time of metallic pollutants present in industrial atmospheric effluents. The method of measurement is the atomic spectrometry of emission coupled to an ICP torch (Inductively coupled Plasma). The technology of the fluidized beds is used as system of introduction of the metallic particles into the ICP torch, the interest of the principle of detection resting on the stamping from the usual procedure of calibration of the analytical system. The results are presented in two parts. The first relates to the diagnosis of plasmas formed with various mixtures of N{sub 2}/O{sub 2} which one corresponds to pure air, the second presents the setting process of detection in real time starting from the intensities ratios of the spectral lines of the metallic element with those of the plasma-producing element (argon or pure air) The study of the diagnosis of plasmas made up of mixtures N{sub 2}/O{sub 2} relates to the determination of the atomic excitation temperature from the spectral lines of the copper element and the evaluation of the thermal disequilibrium q Te/Th. This last is obtained by considering the mass enthalpy of various mixtures N{sub 2}/O{sub 2}. The existence of a small thermal disequilibrium is highlighted. The study of detection in real time by ICP torch, without calibration of the system, is based on three points: - spectroscopic data processing to determine the values of the intensities ratios of spectral lines; - the insertion of the intensities ratios and the characteristics of plasma (argon or pure air) into a calculation code of plasma composition; - the comparison of the mass flux values of the metallic pollutants, in real time, obtained by experiments with those resulting from the elutriation calculation, term which defines the phenomenon of entrainment of the particles out of the fluidized bed. The results made it possible to show the similarity of the analytical system response between the use of argon plasma and that of air. (author)

  10. Unified fit of solar and atmospheric neutrinos: towards the MNSP matrix; Ajustements globaux des resultats des experiences de neutrinos solaires et atmospheriques: vers la determination de la matrice de melange des neutrinos (dite MNSP)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-01-01

    Present solar and atmospheric neutrino give a strong indication that neutrinos oscillate between the three active species. This is the first step towards the determination of their mass. But we have also to determine the 3 x 3 neutrino mixing matrix (3 angles and one or several phases linked to CP violation), called MNSP (Maki-Nakagawa-Suzuki-Pontecorvo) and similar to the quark mixing matrix, called CKM (Cabibbo-Kobayashi-Maskawa). The purpose of the colloquium (one day) is to give an overview of the present situation and what progresses are expected in the forthcoming years. 3 guidelines: pedagogical approach, critical review of the experimental situation and of the different analyses, lookout to the future. (author)

  11. Ozone production by pulsed dielectric barrier discharges in air at atmospheric pressure; Efficacite de production d'ozone par decharge electrique pulsee sur barriere isolante dans l'air a pression atmospherique

    Energy Technology Data Exchange (ETDEWEB)

    Odic, E.; Karimi, Ch. [Supelec, Service Electrotechnique et Electronique Industrielle, 91 - Gif-sur-Yvette (France); Dhainaut, M.; Goldman, A.; Goldman, M. [Supelec, Laboratoire de Physique des Gaz et des Plasmas (Univ. Paris-Sud/CNRS), Equipe Decharges Electriques et Environnement, 91 - Gif sur Yvette (France)

    2005-02-01

    Non-thermal plasmas have been extensively studied these past 20 years from a theoretical point of view, but also for practical applications. Atmospheric pressure electrical discharges appear as promising technologies for gas phase and aqueous phase pollution control applications. In such arrangements, arcing i.e. transition to thermal plasma, is classically prevented either by application of short high voltage pulses or by insulating one or both electrodes with a dielectric material. The aim of this paper is to report recent results on ozone formation indicating a significant increase of the energy yields by coupling these two techniques. The chemical behaviour of the discharge is correlated to its electrical characteristics. The physical role plaid by the dielectric surface is highlighted and an interpretation is proposed. (authors)

  12. L'IIASA and the integrated simulation of the trans-border atmospheric pollution assessment and evaluation; L'IIASA et la modelisation integree de la pollution atmospherique transfrontiere. Bilan et evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Soleille, S.; Brignon, J.M.; Farret, R.; Landrieu, G.; Le Gall, A.C.; Rouil, L

    2003-09-15

    The RAINS model is an integrated evaluation model for many pollutants and many effects, developed by he IIASA. This model studies the emissions of 4 atmospheric pollutants (nitrogen oxides, sulfur oxides, ammonium and volatile organic compounds) and the necessary costs to reduce them and the dispersion of these pollutants and their effects (tropospheric ozone formation, acidification and eutrophication). The model can be used in activities scenario mode (energy, agriculture, transports...) to calculate the emissions and their effects or in optimization mode to calculate strategies of emissions control from environmental constraints. (A.L.B.)

  13. Modelling the long-range transport. Atmospheric model from the Oslo EMEP-W center; Modelisation du transfert a longue distance modele atmospherique du centre Emep-W- a Oslo

    Energy Technology Data Exchange (ETDEWEB)

    Joffre, S. [Institut Meteorolique de Finlande Geographical Research Vuorikatu, Helsinki (Finland)

    1997-12-31

    In the framework of the European Monitoring and Evaluation Program (EMEP) concerning transfrontier air pollution in Europe, a model has been developed which gives, based on pollution emission and meteorological data, monthly and annual values for the atmospheric content of ten major pollutants, the deposited dry and wet compounds, and the source allocations. Physical principles of the model and its validation are described

  14. Inverse modeling for the optimization of primary sources of atmospheric pollution at a regional scale; Modelisation inverse pour l'optimisation des sources primaires de pollution atmospherique a l'echelle regionale

    Energy Technology Data Exchange (ETDEWEB)

    Pison, I.

    2005-12-15

    Atmospheric pollution at a regional scale is the result of various interacting processes: emissions, chemistry, transport, mixing and deposition of gaseous species. The forecast of air quality is then performed by models, in which the emissions are taken into account through inventories. The simulated pollutant concentrations depend highly on the emissions that are used. Now inventories that represent them have large uncertainties. Since it would be difficult today to improve their building methodologies, there remains the possibility of adding information to existing inventories. The optimization of emissions uses the information that is available in measurements to get the inventory that minimizes the difference between simulated and measured concentrations. A method for the inversion of anthropogenic emissions at a regional scale, using network measurements and based on the CHIMERE model and its adjoint, was developed and validated. A kriging technique allows us to optimize the use of the information available in the concentration space. Repeated kriging-optimization cycles increase the quality of the results. A dynamical spatial aggregation technique makes it possible to further reduce the size of the problem. The NO{sub x} emissions from the inventory elaborated by AIRPARIF for the Paris area were inverted during the summers of 1998 and 1999, the events of the ESQUIF campaign being studied in detail. The optimization reduces large differences between simulated and measured concentrations. Generally, however, the confidence level of the results decreases with the density of the measurement network. Therefore, the results with the higher confidence level correspond to the most intense emission fluxes of the Paris area. On the whole domain, the corrections to the average emitted mass and to the matching time profiles are consistent with the estimate of 15% obtained during the ESQUIF campaign. (author)

  15. A campaign to study atmospheric pollution at the regional scale: the Escompte programme; Une experience d'etude de la pollution atmospherique a l'echelle regionale. Le programme Escompte

    Energy Technology Data Exchange (ETDEWEB)

    Durand, P. [Meteo-France - Centre National de Recherches Meteorologiques, Centre National de la Recherche Scientifique (CNRS URA 1357), 31 - Toulouse (France); Cros, B. [Observatoire Midi-Pyrenees, Lab. d' Aerologie, Centre National de la Recherche Scientifique (CNRS UMR 5560), 31 - Toulouse (France)

    2004-02-01

    The Escompte programme was set up to improve and validate regional scale chemistry-transport numerical models. During summer 2001, an ambitious field campaign collected data on the meteorological and chemical parameters of the atmosphere during some photo-oxidant pollution events. Performed in the region of Marseille city and Berre lake, this campaign deployed a huge quantity of instruments, and constitutes one of the major operations in this field. (authors)

  16. Modeling of atmospheric pollution at the regional scale: application to the Esquif campaign; Modelisation a l'echelle regionale de la pollution atmospherique: application a la campagne Esquif

    Energy Technology Data Exchange (ETDEWEB)

    Sarrat, C.

    2003-06-01

    The Esquif experimental campaign (study and simulation of air quality in Ile-de-France (Paris region, France)) took place between 1998 and 2000 with the aim of better understanding the dynamical and chemical processes leading to atmospheric pollution peaks in Paris. The construction of a rich and diversified database (12 periods of intensive monitoring (PIM)) has been implemented with the aim of improving the existing chemical-transport models in general and air quality forecasting models in particular. In the framework of this study, the data collected during PIM 2 and 6 were used for the validation and analysis of situations of intensive pollution, simulated with the meso-scale numerical meteorological and chemical model Meso-NHC. The validation of both the dynamic fields (temperature and potential temperature, wind, height of the boundary layer) and the chemical fields (mainly O{sub 3}, NO{sub x}, NO{sub y}, PAN, isoprene) of the model allows to discuss some of the parameters of the model such as the initialization, the boundary forcing and the resolution. Then, a study of the dynamical processes allows to analyze the formation and reinforcement of the pollution conditions. Stress is put on the interaction of the regional scale processes with the photochemical pollution events. In this framework, the dynamical-chemical interaction processes are analyzed in detail, in particular when pollution levels are reinforced by the intrusion of residual ozone inside the convective boundary layer, dragged by the turbulence. Also, the impact of the urban hot island and of the urban wind on the redistribution of primary and secondary pollutants are considered. An analysis of the impact of hydrocarbons of biogenic origin on the ozone concentrations with respect to the temperature and to the presence of primary compounds has been performed for the PIM 2 and 6 of the Esquif campaign. (J.S.)

  17. Ambient air pollution and hospitalization for congestive heart failure among elderly people in seven large US cities; Pollution atmospherique ambiante et hospitalisations pour insuffisance cardiaque congestive chez les personnes agees dans sept grandes villes des Etats-Unis

    Energy Technology Data Exchange (ETDEWEB)

    Morris, R.D.; Naumova, E.N.; Munasinghe, R.L.M.

    2001-01-01

    The aim of this study is the temporal associations between the urban atmospheric pollution, in particular the carbon monoxide, and the hospitalization for congestive heart failure in elderly people, in seven large US cities. (A.L.B.)

  18. Opinions of the French on the atmospheric pollution, the wastes management and the eco-products; Opinions des francais sur la pollution atmospherique, la gestion des dechets et les eco-produits

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-06-01

    Five main opinions can be presented from the answers analysis to the inquiry realized in 1999 by the ADEME on the French way of life and aspirations. The French think that the atmospheric pollution is dangerous for the health and that they are badly informed about the air quality of their town. 87% of the motorists are ready to leave their vehicles the days of high urban pollution level. In less of two years the green products credibility is worsening. Nevertheless the consumer believes sensitive to the ecological arguments. Finally the French are very favorable to the domestic wastes control. (A.L.B.)

  19. The research for a method for controlling atmospheric pollution in a plutonium treatment cell; Recherche d'une methode de controle de la pollution atmospherique dans une cellule traitant le polonium

    Energy Technology Data Exchange (ETDEWEB)

    Bouteiller, E [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires

    1960-07-01

    The aerosols likely to contain {sup 210}Po are trapped by bubbling through an acid solution. The problem of determining the polonium concentration of the solution has been solved by combining it with telluric acid. The reduction is carried out at pH = 0 using a solution of stannous chloride. We have studied the factors influencing coprecipitation; nature of the medium, pH, amounts of telluric acid and of stannous chloride. The average yield for the precipitation is 93 per cent. After precipitation, the polonium is filtered on paper and its activity is measured by means of a scintillation counter. The method makes it possible to measure 1/20 of the maximum permissible dose with an accuracy of 20 per cent. (author) [French] Les aerosols susceptibles de contenir du {sup 210}Po sont captes par barbotage dans une solution acide. Le probleme de la concentration de la solution en polonium a ete resolu en entrainant celui-ci avec de l'acide tellurique. La reduction est effectuee a pH = 0 par une solution de chlorure stanneux. Nous avons etudie les facteurs influencant la coprecipitation: nature du milieu, pH, quantite d'entraineur, quantite de chlorure stanneux. Le rendement moyen de la precipitation est de 93 pour cent. Apres precipitation, le polonium est filtre sur papier et son activite mesuree au compteur a scintillations. La methode permet de mesurer le 1/20 de la dose maximum permise avec une precision de 20 pour cent. (auteur)

  20. Heat wave during the summer 2003: relationship between temperature, air pollution and mortality in nine French towns; Vague de chaleur de l'ete 2003: relations entre temperatures, pollution atmospherique et mortalite dans neuf villes francaises

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    The objective of this study is to estimate, by taking the a particular period of summer 2003, the relationship between the exposure to ozone and the mortality risk. This estimation has for aim to realize a more valid, scientifically, evaluation of sanitary impact, for the period of heat wave that this one that could has been lead from anterior results. This study searches also to estimate, for the period of heat wave, the excess of mortality risk linked with the exposure to temperature and air pollution and the relative part of each of these factors in this combined effect. The analysis searches to evaluate an eventual displacement of mortality at short term that is to say a period of under mortality occurring at the immediate declining of the heat wave. (N.C.)

  1. Study and management of atmospheric exhaust gas in acetic acid fermentation developing a new process for alcohol vinegar production; Etude et maitrise des rejets atmospheriques en vinaigrerie, developpement d'un procede nouveau de conduite de la fermentation acetique

    Energy Technology Data Exchange (ETDEWEB)

    Pochat Bohatier, C.

    1999-12-06

    The aim of the study was to examine emissions of volatile organic compounds (VOCs) during acetic (acid) fermentation. The first part of the study presents the methodology developed to reproduce production cycles for spirit vinegar and to analyse gas effluents. The second part describes the origin and quantification of the emissions (ethanol, acetic acid, acetaldehyde and ethyl acetate). The acetic acid is produced by bacterial metabolism while the ethyl acetate is a result of the chemical reaction of esterification. By modelling the emissions during batch processing we were able to identify the various parameters involved when VOCs are carried along by the fermentation gases. The quantities of ethyl acetate depend on the length of time the diluted alcohol is stored, and on its composition. By using a fed-batch method with a continuous supply of ethanol we could reduce alcohol emissions. The third part of the study develops the kinetics studies carried out to adapt the fed-batch process to acetic acid fermentation. The influence of ethanol, either in terms of deficiency or inhibition, is minimized between 8 and 16 g.1-1. A study of the growth rate of bacteria in relation to the amount of acetic acid showed that the latter was highly inhibitive. There is a critical concentration of acetic acid at which the growth of bacteria stops, and the death rate of the culture increases rapidly. The latter depends on the composition of the culture's medium; the corresponding pH of the concentration is between 2.25 and 2.28. By limiting the formation of ethyl acetate in the diluted alcohol and by controlling the concentration of ethanol at 16 g.l -1 per fermentation, the VOC emissions are reduced by 30% and the yield increases as a result. (author)

  2. Effects of air pollution from cars on police health in Paris; Effets de la pollution atmospherique d`origine automobile sur la sante des policiers affectes a la circulation a Paris

    Energy Technology Data Exchange (ETDEWEB)

    Bugajny, Ch.; Delaunay, C.; Viellard, H. [Prefecture de Police de Paris, 75 (France). Laboratoire Central; Petit-Coviaux, F.; Coiron, C.; Squinazi, F. [Laboratoire d`Ygiene de la Ville de Paris, 75 (France); Lecomte, D. [Prefecture de Police de Paris, 75 (France). Dirt. Prevention des Risques Sanitaires

    1999-01-01

    The aim of this study was to assess the effects of car pollution on police health in Paris, more particularly for policemen who are working near streets and crossroads. A population of non-exposed policemen has also been studied as a reference. This work included individual exposure measurements to some urban pollution main indicators and biological determinations to estimate the effects of these pollutants on health. Biological measurements in blood, including determinations of carboxyhemoglobin and lead, were realized on 204 men and women employed by the Prefecture de Police. Carbon monoxide and benzene individual exposure had been measured on 38 men among these policemen, by the use of individual analyzers or pump sampling. Three classes of exposure, which depends on police activities, could be characterized according to CO and benzene exposure levels and carboxyhemoglobin concentrations. Carboxyhemoglobin mean values before traffic exposure are four to five times more important for smokers (4.5 % HbCO) than for no-smokers (1.0 % HbCO). After work, these mean values are respectively 5.3 % and 1.1 % HbCO). We could conclude that no-smokers agents don`t reach the WHO value (2.5 % HbCO), which should not been exceeded, while average HbCO percentage for smokers after work is twice more important than OMS value. So, smoking contributes to higher levels of CO in blood than car exhaust pollutants, even for high air pollutants concentrations. CO exposure levels are lower than the WHO recommendations for all the durations, and therefore lower than limit values fixed in working places (55 mg.m{sup 3} for 8 hours). No level for airborne benzene is recommended by WHO, as this compound is carcinogenic to humans; WHO indicated that for an air concentration of 1 {mu}g.m{sup 3}, the estimated lifetime risk of leukaemia is 4.10{sup -6}. Individual benzene measurements are lower than limit concentrations for working place (16 mg.m{sup 3} for 8 hours). Lead blood levels, which average value is 45 {mu}g/l, are clearly smaller that the WHO value (200 {mu}g/l), considered for the beginning of a chronical lead poisoning. (authors) 10 refs.

  3. La financiarisation du capitalisme urbain : Marchés immobiliers tertiaires et politiques de développement urbain dans le Grand Paris et le Grand Lyon, les projets des Docks de Saint-Ouen et du Carré de Soie

    OpenAIRE

    Guironnet , Antoine

    2017-01-01

    Myriads of urban objects and spaces located in city-regions have turned into financial assets. Office buildings, shopping malls, student dwellings, and large utilities are purchased by investment funds and listed property companies, which seek to capitalise on the future income streams based on their use by firms and people. Urban redevelopment and financial markets are thus intertwined through the financing circuits of property markets. By analysing the interactions between the financial str...

  4. Concept for urban heating systems using co-generation; Conception de systemes de chauffage urbain pour la cogeneration. Phase I: application au quartier des Morasses (Martigny) de la methode de conception des reseaux de chauffage urbain developpe au LENI. Rapport final

    Energy Technology Data Exchange (ETDEWEB)

    Cherix, G. [Centre de competence en urbistique CREM, Martigny (Switzerland); Weber, C. [Swiss Federal Institute of Technology (EPFL), Laboratoire d' energetique industrielle (LENI), Lausanne (Switzerland)

    2006-07-01

    This final report for the Swiss Federal Office of Energy (SFOE) reviews the work done in the first phase of a project concerning the concept for a district heating system in Martigny, Switzerland. This work was carried out by the Centre for Municipal and Energy Research CREM in Martigny, Switzerland, and the Laboratory for Industrial Energy LENI at the Swiss Federal Institute of Technology in Lausanne. Software developed at the LENI is introduced and its use for the determination of the necessary configuration and modes of operation of a district heating system in Martigny is discussed. The situation in the Morasses district of Martigny and the promising results obtained are looked at. These can lead to the optimisation of heating supply in other such areas.

  5. [18F]-FDG imaging with an ''hybrid'' CDET gamma-camera a tool for the detection of breast cancer recurrence; La scintigraphie au [18F]-FDG realisee a l'aide d'une gamma-camera ''hybride'' TEDC, un outil diagnostique performant pour la detection des recidives du cancer du sein

    Energy Technology Data Exchange (ETDEWEB)

    Grahek, D.; Montravers, F.; Kerrou, K.; Younsi, N.; Mabille, L.; Zerbib, E.; Achaibou, F.; Beco, V. de; Colombet, C.; Petegnief, Y.; Talbot, J.N. [Hopital Tenon, 75 - Paris (France)

    2001-05-01

    We searched for recurrence of breast cancer after a curative treatment by means of [18F]-FDG imaging using a 'hybrid' gamma-camera with coincidence detection (CDET). The 44 patients whose examinations are currently evaluable were referred either for occult disease (rising blood levels of tumor markers CEA or CA 15.3 without detectable lesions at conventional work-up) in 20 cases or for a recurrence suspected at imaging or assessed histologically in 24 cases. In the first clinical setting FDG-CDET had a 100 % sensitivity (13/13) and a 71% specificity (5/7); in the second clinical setting, the corresponding values were 90% (18/20) and 100% (4/4); globally the values were respectively 94% (31/33) and 82% (9/11). In 11 cases (35%), the recurrence appeared at CDET as an isolated focus, that left open the opportunity of a targeted therapy by radiotherapy or surgery. CDET detection of FDG did allow localisation of occult disease and of foci that were smaller than 10 mm. This modality could develop rapidly (as long as the number of patients referred is not too large) and would allow the clinician to prescribe it as a first line examination in case of rising tumor marker levels, in order to avoid useless imaging procedures in those patients. Its excellent sensitivity and positive predictive value (94%) favours the detection of recurrences at an early stage when they can be treated by a targeted therapy. Concerning detection of bone metastases, FDG-CDET appeared more efficient than conventional scintigraphy (sensitivity at lesion level = 75% versus 44%). (author)

  6. Radiological consequences of floods in december 2003 in small Camargue at the place known as the Claire Farine. Results of the assessment realised at the demand of the C.L.I. of the Gard; Consequences radiologiques des inondations de decembre 2003 en petite Camargue au lieu dit Claire Farine. Resultats de l'expertise realisee a la demande de la CLI du Gard

    Energy Technology Data Exchange (ETDEWEB)

    Eyrolle, F.; Duffa, C.; Leprieur, F.; Rolland, B.; Antonelli, C.; Marquet, J.; Saleun, G.; Renaud, Ph

    2004-05-15

    The levels of activities measured in the market gardening are not significantly different from these ones measured in the similar samples that did not received the floods in december 2003. The results of chemical analysis do not show contamination of soils and market gardening. In conclusion, the results of assessment show that the floods of december 2003 in small Camargue at the place called 'Claire Farine) had no significant radiological and chemical consequences. (N.C.)

  7. ÉTUDE DE CAS — Dar es-Salaam, Tanzanie : Assurer la sécurité ...

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

    L'évolution rapide du milieu urbain a suscité un intérêt croissant pour l'agriculture urbaine. Des chercheurs de l'Université agricole Sokoine et de l'Université de Dar es- Salaam ont commencé à réunir des arguments en faveur d'une nouvelle vision du développement urbain — un développement qui, comme le dit Ben ...

  8. Agriculture in Urban Planning : Generating Livelihoods and Food ...

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

    29 nov. 2011 ... Cet ouvrage, qui est l'oeuvre de chercheurs dans le domaine de l'agriculture urbaine, traite de stratégies concrètes d'intégration de l'agriculture urbaine au paysage urbain. À partir de travaux qu'ils ont réalisés sur le terrain dans des villes du Sud qui connaissent une urbanisation galopante, les auteurs ...

  9. Résultats de recherche | Page 411 | CRDI - Centre de recherches ...

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

    Agriculture urbaine en Afrique de l'Ouest : Une contribution à la sécurité alimentaire et à l'assainissement des villes. Cet ouvrage décrit la contribution précieuse de l'agriculture urbaine à la sécurité alimentaire et à l'assainissement des agglomérations urbaines d'Afrique centrale et d'Afrique de l'Ouest. Publication Date.

  10. Mexique : tous les projets | Page 5 | CRDI - Centre de recherches ...

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

    Sujet: MODELS, Fiscal policy, TAX SYSTEMS, TAX REFORM, TAXATION, INCOME ... Sujet: PEACE RESEARCH, CONFLICT RESOLUTION, DEMOCRATIZATION, ... de travail constituent une importante source de pollution en milieu urbain.

  11. Une géographie urbaine à la marge? Formes et processus de l'urbanisation saharienne égyptienne (hors marges du Delta et de la Vallée) 1917-2006

    OpenAIRE

    Drozdz, Martine

    2015-01-01

    Le Sahara égyptien, qui comptait 36 000 habitants en 1907, en compte un siècle plus tard 398 000, répartis le long des franges littorales, de leur arrière,pays et dans cinq régions d’oasis. A partir des conclusions des recherches récentes sur le Sahara qui montrent que l’urbanisation, c’est,à,dire la transformation des activités des habitants, des modes de résidence, des pratiques sociales et des échanges représente la mutation la plus importante des soixante dernières années pour ces territo...

  12. L'innovation sociale : un outil pour l'articulation entre les pratiquants sportifs auto-organisés et les espaces urbains dans la ville de Yaoundé – Cameroun

    Directory of Open Access Journals (Sweden)

    Mbida Frank

    2016-01-01

    Full Text Available L'innovation sociale est considérée comme une recomposition originale, créative et adaptative des ressources existantes disponibles dans ou à proximité des organisations (Coignet, 2013. Dans le champ sportif sous le prisme des politiques sportives locales, elle se donne à voir à travers les politiques de développement des pratiques sportives au sein des structures sportives traditionnelles (clubs, associations, etc. suivant deux volets dont l'un concerne les interactions entre les membres de la structure et l'autre, la création d'un espace d'échanges où vont émerger des coopérations à travers le partage des sentiments tels que l'amitié, l'amour (Illich, 1973. Si cette transformation sociale s'opère dans les structures sportives institutionnelles dans les pays développés, c'est d'abord grâce à l'appui des pouvoirs publics qui structurent les pratiques sportives (Charrier, 2002 ; Vieille Marchiset, 2003 ; Charrier, Lapeyronie, 2014, cependant il en est autrement dans les pays en développement notamment au Cameroun où l'innovation sociale dans le secteur sportif est portée par les groupes sportifs auto-organisés (Loret, 1996. Dans ces groupes, s'expérimentent des formes nouvelles de mobilisation et de participation sociale donc de socialisation. Ces expérimentations se donnent à voir à travers les stratégies d'occupation des espaces sportifs.

  13. 3. national sittings on energy ''energy, urban mobility,... tomorrow: which responsibilities for the local governments?''; 3. assises nationales de l'energie. ''Energie, mobilite urbaine,... demain: quelles responsabilites pour les collectivites locales?''

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    This conference deals with the local government policy concerning the energy mastership of the transportation sector. Sixteen workshops discussed on the problem of the urban mobility in an environmental quality context: legal provisions affecting the energy mastership, mobility in the urban area, regulations, clean technologies enhancement, the public information impact on the energy consumption and the financial means. (A.L.B.)

  14. Les concessions pontificales d’indulgences d’Honorius IV à Urbain V (1285-1370) : leur portée pastorale. Jalons pour une enquête

    OpenAIRE

    Roncière, Charles M. de la

    2015-01-01

    Les indulgences accordées par les papes d’Avignon ont fait l’objet d’un article récent de Francis Rapp dont l’auteur examine principalement les indulgences de jubilé, mais commence par rappeler comment les indulgences se sont mises en place, en profitant de la diffusion de la confession auriculaire. À l’occasion de cette confession, le prêtre, une fois l’aveu entendu et l’absolution accordée, impose à son pénitent vraiment contrit une « satisfaction », une expiation destinée à effacer non plu...

  15. Proceedings of the Prop'Elec 2000 colloquium. Advances of electric drive in urban transportation systems; Actes du colloque Prop'Elec 2000. Progres de la traction electrique dans les transports urbains

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    This document is the proceedings of Prop'Elec 2000 colloquium on the advances in electric power drive in urban transportation systems. The colloquium comprises 5 sessions dealing with: 1 - public collective electric-powered transportation system: synthesis of urban guided systems (C. Soulas, INRETS), the fast travelator (A. Cote, RATP), the power supply system of METEOR automatic underground railway (P. Lagrange, W. Seiler, RATP); 2 - electrical drive in urban transportation systems: start-up of a thermal engine with super-capacitors (D. Bouquain (CREEBEL), H. Gualous, A. Djerdir, A. Berthon, J.M. Kauffmann (L2ES, IGE)), The LEV (light weight electric vehicle) project in Mendrisio (U. Schwegler, LEV/Suisse), prototype of electrical bike that use a wheel-engine (C. Espanet, F. Gustin, J.M. Kauffmann (IGE), S. Robert, M. Karmous (EICN)), TWIL: a new generation of small electrical bikes (E. Escallot, T. Bontems (EPMI)), thermal and magnetic analysis of a rectilinear movement actuator (J.C. Vannier, M. Kadiri (SUPELEC)), torque undulation and vibrations in automobile electrical drives (A.L. Bui-Van (Renault), A. Fonseca (LEG)); 3 - collective electric-powered transportation systems: STARS: autonomous transportation system with flywheel charging at the station (P. Gibard (Alstom Transport), K. Abuda, J.M. Vinassa (IXL Bordeaux)), Translhor tramway: presentation of the drive system (L. Verdier, LHOR); 4 - electric-powered and hybrid vehicles: batteries for electric-powered vehicles (J.F. Fauvarque, CNAM), Li-ion batteries and their application in automotive industry (T. Faugeras, SAFT), optimized drive systems for electric-powered vehicles (J. Saint-Michel, Leroy Somer), the Citroen Xsara Dynactive (S. Derou, PSA), 5 - electric-powered and hybrid vehicles: the electrical car in tomorrows' city (M. Parent, INRIA), the market of electric-powered vehicles in France and Europe (M. Valet, PSA). (J.S.)

  16. Valorisation de substrats organiques divers dans l'agriculture péri-urbaine de Ouagadougou (Burkina Faso pour l'amendement et la fertilisation des sols : acteurs et pratiques

    Directory of Open Access Journals (Sweden)

    Kaboré, WTT.

    2011-01-01

    Full Text Available Organic substrates recycling in the sub-urban agriculture of Ouagadougou (Burkina Faso for soils fertilization: description of the different actors and their practices. This study aimed to establish an overview of the main actors of the sub-urban agriculture of Ouagadougou, their practices and expectations, and to characterize the used organic substrates (OS. For that, a farm survey was carried out on the most representative sites with 64 persons (cereal farmers, truckers and nurserymen randomly chosen. OS were sampled with each actor, when available. Thus, 27 samples were taken and characterized through chemical analyses and laboratory incubations to follow organic carbon mineralization. The results highlighted that 35% of cereal farmers, 69% of truckers and 95% of nurserymen were 20 to 40 years old, that a large proportion of cereal farmers and truckers were not sent to school while 70% of nurserymen had at least primary education. Sub-urban agriculture was the only activity for 43% of farmers, 83% of truckers and 91% of nurserymen. Moreover, 71% of cereal farmers and 73% of nurserymen used municipal wastes as source of organic matter against only 17% of truckers, the majority of them using animal manures. The main criterion of choice of OS was their availability without any other consideration. Even if a large majority of the actors think that composts of OS were better than brut OS, a minority of them used currently composts. The best ways for an adoption and utilization of OS composts were to facilitate their accessibility and to promote these composts, composting techniques and their interests through advertising in mass media. Chemical analyses and laboratory incubations showed a great variability of the SUW, both in the same group and actors' groups. However, in case of total organic carbon, total nitrogen and total phosphorous contents, the following tendencies were observed: Contenttruckers > Contentfarmers > Contentnurserymen. For the sum of major elements Ca, K, Mg, Na (SME, it was observed that SMEtruckers ≈ SMEfarmers > SMEnurserymen. In addition, except a few atypical substrates, OS used by nurserymen were largely stabilized compared to those of cereal farmers and truckers.

  17. A particular light on todays and tomorrows urban energies: perceptions and views of the young generation; Un eclairage particulier sur les energies urbaines d`aujourd`hui et de demain: perceptions et regards des jeunes

    Energy Technology Data Exchange (ETDEWEB)

    Martin, V.; Strauss, N.; Jaladis, S.; Waroux, D.

    1995-12-31

    In the framework of prospective studies on the town of the future, an inquiry with questionnaire was carried out on a pool of 230 students from 5 schools of the western suburb of Paris (France) in order to have an idea about their representations of todays energies, about their consumption habits, their living attitudes and their transportation practices, and about their apprehension of these domains in the 15-20 forthcoming years. For the present day, they spontaneously make reference to the solar and nuclear energies but they do not make distinction between energy source and final energy. Environment is a major concern threw the pollution aspects and is positioned just behind the society themes (unemployment, AIDS, exclusion). They favour the electric power for the domestic uses. They have a rather pessimistic vision of the future of energy resources. According to their opinion, electric power, bio-fuels and solar energy will be the future energy sources for transportation systems, electricity will dominate the domestic uses and they will be reticent with respect to the domestic development of safety networks for goods and people. The cross-comparison between sexes and occupational branches reveals three groups: modernist, conservative and ecologist. (J.S.)

  18. Anaerobic digestion of sewage sludge: French inventory and state of the art; La methanisation des boues d'epuration urbaines. Etat des lieux en France et etat de l'art

    Energy Technology Data Exchange (ETDEWEB)

    Reverdy, A.L.; Dieude-Fauvel, E.; Baudez, J.C. [Institut national de recherche en sciences et technologies pour l' environnement et l' agriculture - Irstea, Centre de Clermont-Ferrand, Unite de recherches TSCF, Les Palaquins, 03150 Montoldre (France); Ferstler, V. [MEEDDM - DEB, Grande Arche, Paroi Sud, 92055 La Defense Cedex (France)

    2012-07-01

    Following the Kyoto Protocol and the 'Grenelle de l'environnement', France committed itself to develop renewable energies. Methanization is a process which falls within this objective. Anaerobic digestion of organic material generates biogas made of methane (CH{sub 4}), carbon dioxide (CO{sub 2}) and water (H{sub 2}O). In 2009, electricity generation from biogas represented only 0, 93% of the renewable electricity production in France. An inventory of facilities and a state of the art of the methanization of sewage sludge on wastewater treatment plants with the inhabitant equivalent of more than 30.000 were realized. They were done with bibliography and surveys. In France, 68 installations of sewage sludge methanization were counted. The primary technology used is a mix reactor in which sewage sludge, heated at deg. C 37, are introduced. Biogas is mainly valued to warm those sludges. Electrical valorization is poor, especially on old installations. Anaerobic digestion of sewage sludge is generally accepted by managers, mainly because of its capacity to reduce sewage sludge quantity and odors. Methanization as listed in France is quite basic. It is performed with digestion series modification, with pretreatments or with co-digestion. Given the quantity of sewage sludge which could be digested, France could increase renewable energies via biogas. However this technology is perfectible in many units because biogas is burned in flares. (authors)

  19. L’agriculture urbaine à Meknès (Maroc à la croisée des chemins : disparition d’une agriculture marginalisée ou retour de la cité jardin?

    Directory of Open Access Journals (Sweden)

    Patrick Dugué

    2015-10-01

    Full Text Available L’accroissement démographique rapide des villes au sud de la méditerranée s’est accompagné d’une urbanisation consommatrice de terres fertiles. Toutefois des espaces interstitiels difficilement constructibles, entre les espaces construits, hébergent encore des exploitations agricoles. C’est le cas notamment des 3 vallées traversant l’agglomération de Meknès, au Maroc. Sur la base d’enquêtes auprès de 80 agriculteurs et 42 consommateurs et d’entretiens avec des décideurs et commerçants de cette ville, nous avons montré la diversité des systèmes de production présents dans la ville (maraîchage et élevage laitier et à viande principalement. Malgré la proximité de la ville, peu de produits sont vendus directement aux consommateurs. Dans le cas du maraîchage, une action urgente est à engager pour fournir de l’eau d’irrigation de qualité aux agriculteurs de ces vallées afin qu’ils renoncent au détournement des eaux usées produites par la ville. Les meilleurs atouts de l’agriculture dans les villes au sud de la Méditerranée sont d’une part de rendre possible l’existence de paysages verdoyants et ouverts permettant d’améliorer le bien-être des citadins et l’attractivité touristique de ces villes et d’autre part l’intérêt récent de citadins pour des produits de qualité vendus en circuit court.

  20. Intégration spatiale des marchés ruraux et urbains de la banane à cuire dans le Sud-Est de la Province du Sud du Rwanda

    Directory of Open Access Journals (Sweden)

    Niyitanga, F.

    2016-01-01

    Full Text Available Integration of Rural and Urban Cooking Banana Markets in the South-East of Rwanda Southern Province. This study consists of the analysis of spatial integration of rural and urban markets of cooking banana iin the South-East of Southern province of Rwanda. It uses time series of 2001-2006 period resulting from a survey on agricultural products commercialization in rural and urban markets. The analysis used the methods of co-integration and error correction model (ECM. The results of the study show that there is, in general, weak price transmission between rural and urban markets of cooking banana. Hence rural and urban markets of cooking banana are weakly integrated. The weak integration of markets means that there exist unexploited opportunities of arbitration that would have led to the creation of "geographical monopolies" because, on each rural market, there are traders who collect the cooking banana to sell it only on the same market. This weak spatial integration of rural and urban markets can result from poor commercial infrastructures (roads and communication infrastructures and the lack of information on market (supply, demand and price. It would be necessary to develop and improve the commercial infrastructures for improving the spatial integration of cooking banana rural and urban markets in the South-East of the Southern province of Rwanda. Market integration can in turn lead to the specialization of producers of cooking banana and to the increase of cooking banana production.

  1. A particular light on todays and tomorrows urban energies: perceptions and views of the young generation; Un eclairage particulier sur les energies urbaines d`aujourd`hui et de demain: perceptions et regards des jeunes

    Energy Technology Data Exchange (ETDEWEB)

    Martin, V; Strauss, N; Jaladis, S; Waroux, D

    1996-12-31

    In the framework of prospective studies on the town of the future, an inquiry with questionnaire was carried out on a pool of 230 students from 5 schools of the western suburb of Paris (France) in order to have an idea about their representations of todays energies, about their consumption habits, their living attitudes and their transportation practices, and about their apprehension of these domains in the 15-20 forthcoming years. For the present day, they spontaneously make reference to the solar and nuclear energies but they do not make distinction between energy source and final energy. Environment is a major concern threw the pollution aspects and is positioned just behind the society themes (unemployment, AIDS, exclusion). They favour the electric power for the domestic uses. They have a rather pessimistic vision of the future of energy resources. According to their opinion, electric power, bio-fuels and solar energy will be the future energy sources for transportation systems, electricity will dominate the domestic uses and they will be reticent with respect to the domestic development of safety networks for goods and people. The cross-comparison between sexes and occupational branches reveals three groups: modernist, conservative and ecologist. (J.S.)

  2. Un diagramme d'influence pour l'évaluation des risques d'inondations urbaines au travers des dangers de rejet pluvial dans des conditions non-stationaires

    DEFF Research Database (Denmark)

    Åström, Helena Lisa Alexandra; Friis Hansen, P.; Garré, L.

    Urban flooding introduces significant risk to society. Decision-makers need to agree on how to adapt urban areas to flooding. Non-stationarity leads to increased uncertainty and this is shown to be difficult to include into actual decision-making. Transparent methods are needed to facilitate...... the decision-making process. The primary objective of this study was to develop a risk assessment and decision support framework for pluvial urban flood risk under non-stationary conditions using an Influence diagram (ID) which is a Bayesian network (BN) extended with decision and utility nodes. Non......-stationarity in the urban system. The framework provides means for decision-makers to assess how different decisions on flood adaptation affect the risk now and in the future. For the development of the BN we used the HUGIN software. The result from the ID was extended with a cost-benefit analysis defining the net benefits...

  3. Apport des arbres fruitiers à la sécurité alimentaire en milieu urbain tropical: cas de la commune de Limete- Kinshasa, République Démocratique du Congo

    Directory of Open Access Journals (Sweden)

    Luyindula, N.

    2005-01-01

    Full Text Available Fruit Trees Contribution to Food Security in Tropical Urban Environment: Instance of Commune of Limete in Kinshasa- Democratic Republic of Congo. Problems of hunger and malnutrition in urban environnements force the populations to exploit all the food resources available. This work investigates the contribution to the diet of the population of the edible fruits produced by the 19 species of trees found in a district of Kinshasa. An investigation carried out in 1.09% of the 18,475 household plots of the commune of Limete permitted to estimate at approximately 47,000 feet the number of trees planted there and their annual production at approximately 4.087 tons. The six main species (Mangifera indica, Persea americana, Elaeis guineensis, Carica papaya, Dacryodes edulis and Musa paradisiaca account on their own for an approximate total of 36,400 feet. The contribution of these species to the population alimentation was estimated respectively at 10.9 g, 6.1 g, 4.5 g, 4.4 g, 1.8 g and 0.6 g of fruits per person and per day. The control of certain environmental- friendly techniques and environmental education relating to the trees in urban environment should increase the importance of this contribution.

  4. Proceedings of the Prop'Elec 2000 colloquium. Advances of electric drive in urban transportation systems; Actes du colloque Prop'Elec 2000. Progres de la traction electrique dans les transports urbains

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    This document is the proceedings of Prop'Elec 2000 colloquium on the advances in electric power drive in urban transportation systems. The colloquium comprises 5 sessions dealing with: 1 - public collective electric-powered transportation system: synthesis of urban guided systems (C. Soulas, INRETS), the fast travelator (A. Cote, RATP), the power supply system of METEOR automatic underground railway (P. Lagrange, W. Seiler, RATP); 2 - electrical drive in urban transportation systems: start-up of a thermal engine with super-capacitors (D. Bouquain (CREEBEL), H. Gualous, A. Djerdir, A. Berthon, J.M. Kauffmann (L2ES, IGE)), The LEV (light weight electric vehicle) project in Mendrisio (U. Schwegler, LEV/Suisse), prototype of electrical bike that use a wheel-engine (C. Espanet, F. Gustin, J.M. Kauffmann (IGE), S. Robert, M. Karmous (EICN)), TWIL: a new generation of small electrical bikes (E. Escallot, T. Bontems (EPMI)), thermal and magnetic analysis of a rectilinear movement actuator (J.C. Vannier, M. Kadiri (SUPELEC)), torque undulation and vibrations in automobile electrical drives (A.L. Bui-Van (Renault), A. Fonseca (LEG)); 3 - collective electric-powered transportation systems: STARS: autonomous transportation system with flywheel charging at the station (P. Gibard (Alstom Transport), K. Abuda, J.M. Vinassa (IXL Bordeaux)), Translhor tramway: presentation of the drive system (L. Verdier, LHOR); 4 - electric-powered and hybrid vehicles: batteries for electric-powered vehicles (J.F. Fauvarque, CNAM), Li-ion batteries and their application in automotive industry (T. Faugeras, SAFT), optimized drive systems for electric-powered vehicles (J. Saint-Michel, Leroy Somer), the Citroen Xsara Dynactive (S. Derou, PSA), 5 - electric-powered and hybrid vehicles: the electrical car in tomorrows' city (M. Parent, INRIA), the market of electric-powered vehicles in France and Europe (M. Valet, PSA). (J.S.)

  5. Systèmes maraîchers en milieux urbain et périurbain des zones Soudano-sahélienne et Soudano-guinéenne du Cameroun: cas de Garoua et Ngaoundéré

    Directory of Open Access Journals (Sweden)

    Nchoutnji, I.

    2009-01-01

    Full Text Available Horticultural Production Systems in the Soudano-sahelian and Soudano-guinean Agro Ecological Zones of Cameroon: Cases of Garoua and Ngaoundéré. A study was carried out in Garoua (Soudano-Sahelian zone and Ngaoundéré (Soudano-Guinean zone to characterize horticultural production systems. Investigations revealed that more than 500 families cultivated horticultural crops yearly. Two types of legumes are concerned: European legumes (tomato, onion, cabbage… and African legumes (oseille de Guinée, morelle noire…. In Garoua, all types are produced and African legumes are mostly (70% by women. In Ngaoundéré where mainly European legumes are produced, women are about 15.3% of all producers. Producers are not from local origin and are organized in production areas according the type of legumes. In Garoua, there are essentially from the Far North province while those in Ngaoundéré are from the West province. There are of three types: those having many other activities, those cultivating in various lands according to seasons and those exploiting just one season of the year. Chemicals are used when available and doses are not respected. Only those who have financial means easily access to flooded lands. Horticultural crops production is by hand tools. It is an important source of income associated to cotton and small trading. Tomato and onion produced are carried to other town and in neighboring countries. Other crops are locally consumed.

  6. Politique de l’eau et aménagement urbain La « Renaturation » de la rivière Saint-Charles à Québec

    OpenAIRE

    Brun, Alexandre

    2014-01-01

    La « renaturation » de la section aval de la rivière Saint-Charles à Québec (1996-2009) marque un tournant en matière de politique de l’eau au plan municipal. Cette « renaturation » a en effet été précédée par des opérations de remblaiement (années 1960), de bétonnage des berges et de réduction des effets des marées (années 1970) menées à l’époque dans une perspective hygiéniste et esthétique. Au cours des années 1990, la Ville de Québec a constaté que ces interventions ont profondément pertu...

  7. La prise en compte des innovations en matière de mobilité dans la planification urbaine : le cas des Services de transports personnalisés (STP)

    OpenAIRE

    Castex, Élodie; Frère, Séverine; Groux, Annette

    2017-01-01

    Cet article s’intéresse à la façon dont la planification peut ou non permettre aux politiques de déplacements d’innover, de prendre en compte des nouveaux besoins et formes de mobilité. S’appuyant sur un travail de recherche qui porte sur la place des modes de transports alternatifs que sont le covoiturage, l’autopartage, le vélo-en-libre-service et le transport à la demande dans les politiques publiques, cet article tentera de comprendre comment les modes de déplacement innovants sont pris e...

  8. Insécurité urbaine, analyse criminologique et prévention situationnelle intégrée - Urban insecurity, criminological analysis and integrated situational prevention - Insicurezza urbana, analisi criminologica e prevenzione situazionale integrata

    Directory of Open Access Journals (Sweden)

    Koudou O.

    2009-08-01

    Full Text Available L’insécurité en Côte d’Ivoire est stable. Les actions et missions de la police ne suffisent pas pour la réguler. Il est possible de compléter celles-ci par la stratégie de la prévention situationnelle « intégrée ». Celle-ci porte sur huit points complémentaires : 1- Analyse des problèmes criminels ; 2- Intégration de la technologie de sécurité ; 3- Surveillance continue de précision ; 4- Restauration de sites à risques ; 5- Police de proximité anticipatrice ; 6- Actions coordonnées des régulateurs ; 7- Modification de l’attitude des victimes potentielles ; 8- Evaluation et adaptation des actions.Insecurity in Ivory Coast is stable. Acts and assignments of police are not enough to decline it. It is possible to complete these by the strategy of “integrative” situational prevention. These are supported by eight complementary degrees: 1- Analysis of criminals problems; 2- Integration of security technology; 3- Precision in uninterrupted supervision; 4- Restoration of risks situations; 5- Proximity police for anticipation; 6- Regulator co-ordination acts; 7- Modification of potential victims attitudes; 8- Valuation and adaptation acts.L’insicurezza in Costa d’Avorio è stabile. Le azioni e gli interventi della polizia non sono sufficienti a regolarla ed è possibile completarli tramite la strategia della prevenzione situazionale « integrata ». Quest’ultima si basa su otto punti complementari : 1- Analisi dei problemi di criminalità ; 2- Integrazione della tecnologia di sicurezza ; 3- Sorveglianza continua e puntuale ; 4- Ripristino di situazioni a rischio ; 5- Polizia di prossimità preventiva ; 6- Azioni coordinate di regolazione ; 7- Modifiche dei comportamenti delle vittime potenziali ; 8- Valutazione ed adattamento delle azioni intraprese.

  9. Evaluation des apports solaires a l'echelle d'un quartier urbain en periode de chauffe selon sa typologie, son orientation et sa latitude dans un contexte de densification de la ville

    Science.gov (United States)

    Chenard, Laurent

    Mass urbanization is a major issue for town administrators. Population increase will have an impact on the quality of the environment for citizens. Government will have to take decisions to limit those effects. Green energies are part of the solution to reach fixed goals by the public administration for sustainable development. Passive solar energy is studied in this work in an urban canopy located in five different towns: San Francisco, Montreal, Bordeaux, Lyon and Stockholm. Passive solar energy is calculated in the heating season. Direct and diffuse solar radiation is considered by using the Perez model. Radiosity is not taken into account. Heating demand is calculated by the heating degree day method. Seven urban forms have been created to determine the amount of solar energy entering in every window of the urban canopy while taking into account urban context and forms. Optimal orientation of the canopy shows an increase of 5% of the passive solar radiation from original orientation, 180 degrees rotation from first orientation straight south. This value goes lower when stories are added to the urban context. A rotation of 90 degrees from the first orientation shows a decrease of 6 to 15% in solar passive gain. Densification of the urban canopy by adding stories to the buildings results in a loss up to 65% of the solar gain for the first story. It is showed that solar passive energy has a low ratio of 5% for space heating for old buildings, 1960 constructions. Today's buildings have a difference between passive solar energy and heating demand of 10 to 75% depending on the model and location.

  10. La taille des logements, densité et attachement résidentiels – facteurs limitatifs de l’habitat urbain Bucarestois à l’impact visible sur la qualité de vie

    Directory of Open Access Journals (Sweden)

    Mariana Nae

    2007-11-01

    Full Text Available One of the most important life quality’s domains is housing quality related in extenso to the human activities within infrastructure or urban equipment or stricto senso by housing standard highlighted by person per room, crowded dwellings, median living surface and comfort. Residential satisfaction, owner occupiers, households characteristics are very important issues in order to underline the social patterns of the living habitat. The residential satisfaction, an obsolete housing stock, crowded dwelling represent the key – elements of the Romanian communism heritage. The techniques available are “objective” or “subjective” (objective criteria – median living surface, number of person by room – subjective criteria involve the residents of an area determining their own perception of housing. The factor analysis technique enables to examine a large number of variables related to the residential satisfaction. The principal components have been used to provide partial explanation of residential satisfaction.

  11. Contribution du SIG à l'analyse des liens déchets-santé en milieu urbain dans les pays en développement: cas de deux secteurs de la ville de Ouagadougou, Burkina Faso

    OpenAIRE

    Kientga, Sonwouignandé; Golay, François

    2008-01-01

    Among the factors of health risks in urban areas, the solid and liquid wastes worsen particularly the problems of public health in developing countries. Uncontrolled solid waste disposal sites and waste water sites constitute major sources of danger for public health. Often, there is no mapped and documented inventory. The perception of danger related to infectious sources by the exposed populations is generally not well-known and even often ignored by the public institutions in their managem...

  12. SLC summer 2010 university - The ocean in the climate-energy problem, urban policies. Proceedings; Universite d'ete 2010 SLC - L'Ocean dans la problematique Climat-Energie, politiques urbaines. Recueil des presentations

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2010-09-15

    This document brings together the available presentations given at the summer 2010 university of the SLC (save the climate) organization on the topics of the ocean in the climate-energy problem, and of the urban policies. Nine presentations (slides) are compiled in this document and deal with: 1 - Biofuels made from micro-algae: stakes and challenges (Olivier Bernard, Comore - INRIA /CNRS/UPMC); 2 - The energy of waves (Alain Clement, Ecole Centrale de Nantes); 3 - The sea, new source of renewable energies? (J.J. Herou, EDF CIH); 4 - Oceans acidification: the other CO{sub 2} problem (James Orr, Pierre Simon Laplace Institute - IPSL, Laboratory of climate and environmental Sciences - LSCE, CEA-CNRS-UVSQ); 5 - Oceans and carbon cycle (Laurent Bopp, IPSL/LSCE); 6 - Renewable marine energies (Yann-Herve De Roeck, France Energies Marines); 7 - Energy renovation of buildings (Jean-Claude Terrier, Mesac Europe); 8 - Modevur research project - Modeling of urban development, sketch of a development typology of chinese cities (Clement-Noel Douady); 9 - Urban areas in the fight against climate change: stakes, knowledge and controversies (Francois Menard, PUCA)

  13. De la gestion patrimoniale des réseaux d’assainissement aux techniques alternatives de gestion des eaux pluviales, une nouvelle histoire à écrire pour la gestion intégrée des eaux urbaines

    Directory of Open Access Journals (Sweden)

    CHERQUI, Frédéric

    2016-09-01

    Full Text Available Le patrimoine des ouvrages alternatifs de gestion des eaux pluviales ne cesse de s’accroître depuis maintenant plusieurs décennies. Pour les collectivités, organiser le recensement et développer des méthodes pour optimiser le fonctionnement et l’exploitation sur le long terme de ces ouvrages devient donc une préoccupation majeure. À partir du retour d'expérience de la Métropole de Lyon et des connaissances issues de la gestion la patrimoniale des réseaux d’assainissement, cet article permet d'identifier les questions émergentes et d'apporter des premiers éléments de réponse pour la mise en œuvre de la gestion patrimoniale des ouvrages alternatifs de gestion des eaux pluviales.

  14. Devenir des micropolluants prioritaires et émergents dans les filières conventionnelles de traitement des eaux résiduaires urbaines (files eau et boues), et au cours du traitement tertiaire par charbon actif

    OpenAIRE

    Mailler , Romain

    2015-01-01

    The first chapter is dedicated to the conventional primary and biological treatments. Hence, removals of a wide range of priority and emerging micropollutants were assessed for primary settling, physico-chemical lamellar settling, low load activated sludge process and biofiltration. Hydrophobic compounds and metals, as well as volatile organic compounds and biodegradable pollutants are rather well eliminated by these treatments. Moreover, considering removals normalized with nitrogen removals...

  15. Le commerce transnational « informel », vecteur d’une nouvelle hiérarchie de lieux. L’exemple de la périphérie urbaine de Salé (Maroc)

    OpenAIRE

    Bennafla, Karine

    2016-01-01

    Cet article examine les implications spatiales du commerce transnational dans les pays intermédiaires tel le Maroc. Si l’accentuation des réformes néo-libérales entraîne l’ouverture de grandes surfaces, de magasins franchisés ou de malls, elle ne signe pas la fin du commerce « informel », tout aussi globalisé. La nouvelle hiérarchisation de lieux sous l’effet du commerce transnational est peu abordée dans la littérature sur le commerce informel marocain. L’exemple d’une centralité marchande i...

  16. Méthodologie pour l'évaluation de la résilience urbaine face aux crues et développement des stratégies de prévention

    OpenAIRE

    Batica , Jelena

    2015-01-01

    Floods that happen in urban areas are governed by increased frequency. Existing flood defence structures demonstrate its downsides. One of the solutions is moving to risk culture and finding the balance between the shape of land use and urbanization through adaptation, mitigation, prevention, and response and recovery strategies. The new holistic approach is based on resilience concept give a place for new development and implementation of new approaches under existing flood risk management (...

  17. Air pollution and doctors' house calls: results from the ERPURS system for monitoring the effects of air pollution on public health in Greater Paris, France, 1991-1995. Evaluation des Risques de la Pollution Urbaine pour la Santé.

    Science.gov (United States)

    Medina, S; Le Tertre, A; Quénel, P; Le Moullec, Y; Lameloise, P; Guzzo, J C; Festy, B; Ferry, R; Dab, W

    1997-10-01

    This study examines short-term relationships between doctors' house calls and urban air pollution in Greater Paris for the period 1991-1995. Poisson regressions using nonparametric smoothing functions controlled for time trend, seasonal patterns, pollen counts, influenza epidemics, and weather. The relationship between asthma visits and air pollution was stronger for children. A relative risk (RRP95/P5) of 1.32 [95% confidence interval (CI) = 1.17-1.47)] was observed for an increase from the 5th to the 95th percentile (7-51 micrograms/m3) in daily concentrations of black smoke (BS). The risks for 24-hr sulfur dioxide and nitrogen dioxide levels were in the same range. Cardiovascular conditions, considered globally, showed weaker associations than angina pectoris/myocardial infarction, for which RRP95/P5 was 1.63 (95% CI = 1.10-2.41) in relation to ozone ambient levels. Eye conditions were exclusively related to ozone (RRP95/P5 = 1.17, 95% CI 1.02-1.33). Asthma visits and ozone showed an interaction with minimum temperature: an effect was observed only at 10 degrees C or higher. In two-pollutant models including BS with, successively, SO2, NO2, and O3, only BS and O3 effects remained stable. Along with mortality and hospital admissions, house call activity data, available on a regular basis, may be a sensitive indicator for monitoring health effects related to air pollution.

  18. Study of air pollution in urban and peri-urban area during the Escompte campaign using meso-scale modeling. Impact of dynamics and emission inventories; Etude de la pollution en zone urbaine et peri-urbaine a l'aide d'une modelisation meso-echelle durant la campagne Escompte. Impact de la dynamique et des inventaires d'emission

    Energy Technology Data Exchange (ETDEWEB)

    Taghavi, S.M.

    2003-11-01

    This work involves the study of the redistribution of photochemical species over urban and peri-urban areas during the ESCOMTE campaign over southern France. This region includes Marseilles, an urban area close to the industrial zone of Fos-Berre, one of the most polluted sites in Europe. The comprehensive R AMS model, version 4.3, coupled on-line with a chemical module including 29 species (MOCA2.2) is used in parallel code. The efficiency of coupling is checked using Amdahl's law (1967). The percentage of parallelization is 96% for the RAMS model and increases to 98% for RAMS-Chimie. A number of sensitivity tests were performed to obtain realistic meteorological fields. In this work, the heterogeneity of the ground humidity depends on the surface texture, and the topography option accurately retrieves the location of mountaintops and valleys. To avoid bias in the chemical results, the meteorological simulation is first validated with surface data, Lidar, Sodar, soundings and airborne measurements for three IOPs (Intensive Observation Periods) which ave contrasting meteorological conditions. Secondly, the redistribution of chemical modeled species (CO, NO{sub x}, SO{sub 2}, O{sub 3}) is validated with surface, aircraft and Lidar data over this region where the circulation is complex (sea breeze associated with northern (Mistral) or southern flow). Use of two way nested grids resolves the problem of lateral boundaries for chemical fields (Taghavi et al, 2004). The location of convective cells and the channelling of Rhone and Durance depend on direction of synoptic flow and play a role in the redistribution of pollutants and their chemical regime. Two emission inventories of varying quality (30% difference in average) are compared (Taghavi et al, 2004), one with a high resolution (I km) and the other with an average resolution. In both cases, ozone plume location and concentration are the same, and thus we conclude a low resolution inventory is satisfactory to investigate ozone plume formation because it is a nonlinear process. This type of modelling can be used to develop appropriate strategies for emissions reductions. (author)

  19. Los "peers workers" y la participación de las personas y colectivos en situación de exclusión social

    NARCIS (Netherlands)

    Llobet Estany, M.; Baillergeau, E.; Thirot, M.

    2012-01-01

    This paper presents some results of a research project named Proximité et citoyenneté en milieu urbain. Les leçons de la pratique au Québec, aux Pays-Bas et en Espagne undertaken with the support of the French Government’s Citoyenneté urbaine (PUCA) Program. The aim of this exploratory project is to

  20. Caractéristiques sociodémographiques des éleveurs de porcs (Sus ...

    African Journals Online (AJOL)

    Agriculture. Urbaine en Afrique Francophone : Enjeux, Concepts et Méthodes, Smith. OB, Moustier P, Mougeot LJA, Abdou F. (éds). Cirad-Crdi ; 115-142. Ali L, Van-Den-Bossche P, Thys E. 2003. Enjeux et contraintes de l'élevage urbain et périurbain ...

  1. Résultats de recherche | Page 24 | CRDI - Centre de recherches ...

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

    Les rôles sexospécifiques et la violence en milieu urbain au Pakistan. Les jeunes hommes sont les agents et les victimes de violence urbaine les plus visibles et les mieux étudiés. Les jeunes femmes, pour leur part, sont les plus invisibles, et demeurent relativement peu étudiées.

  2. Mbeubeuss Landfill : Exploring Options to Protect Health, the ...

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

    Extrants. Articles de revue. Forum urbain mondial du 19 au 23 juin 2006, Vancouver, 30 ans après Habitat I : une nouvelle vision des villes et une coalition mondiale pour agir. Articles de revue. Benefits of partnership in urban management. Articles de revue. Vertus du partenariat dans la gestion urbaine. Articles de revue.

  3. Contribution to the fight against the greenhouse effect carbon storage in the agricultural soils in France. A collective scientific expertise realized by the INRA for the Ministry of the Ecology and the sustainable development 15 january 2003; Contribution a la lutte contre l'effet de serre stocker du carbone dans les sols agricoles de France. Une expertise scientifique collective realisee par l'INRA a la demande du Ministere de l'Ecologie et du Developpement Durable 15 janvier 2003

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    The expertise realized by the INRA relatives the interest of storage carbon in agricultural soils in France: if the possibility of storage is not inconsiderable, its valorization in the framework of the Kyoto protocol is difficult. This storage should be considered in a broader framework, including all the greenhouse gases and integrated in a global plan on the sustainable agriculture and soils quality. (A.L.B.)

  4. High resolution and high precision absorption spectroscopy using high finesse cavities: application to the study of molecules with atmospheric interest; Cavites de haute finesse pour la spectroscopie d'absorption haute sensibilite et haute precision: application a l'etude de molecules d'interet atmospherique

    Energy Technology Data Exchange (ETDEWEB)

    Motto-Ros, V.

    2005-12-15

    High finesse cavities are used to measure very weak absorption features. Two different methodologies are investigated and applied to the study of molecules with atmospheric interest. First, Continuous Wave - Cavity Ring Down Spectroscopy (CW-CRDS) is used to study the atmospheric spectra of water vapour in the near infrared range. These measurements are performed for temperature and pressure of atmospheric relevance for DIAL applications (Differential Absorption Lidar). This study, financed by the European Space Agency (ESA), goes with the WALES mission (Water Vapour Lidar Experiment in Space). The experimental setup was conceived in order to control pressure, temperature and relative humidity conditions. A particular attention is done to characterize and describe the spectrometer. Then, measurements of red Oxygen B band are performed to demonstrate the huge performance of Optical Feedback Cavity Enhanced Absorption Spectroscopy (OF-CEAS). The desired optical feedback is obtained by light injection into the high finesse cavity through a glass plate placed inside the cavity and closed to the Brewster angle. We show a measurement dynamical range of 5 orders of magnitude (10{sup -5} to 10{sup -10} /cm) and a sensitivity of 10{sup -10} /cm/{radical} Hz. Also, sampling absorption spectra by the super linear cavity frequency comb allows very precise frequency measurements. This is demonstrated by the determination of Oxygen pressure shifts with an absolute accuracy of around 5 x 10{sup -5} cm{sup -1}/atm. To our knowledge, we provide the highest accuracy ever reported for this parameter. (author)

  5. Study of the carbonaceous fraction of the atmospheric aerosol in Chamonix and St Jean de Maurienne: seasonal evolutions, source and chemical characteristics; Etude de la fraction carbonee de l'aerosol atmospherique a Chamonix et St Jean de Maurienne: evolutions saisonnieres, sources et caracteristiques chimiques

    Energy Technology Data Exchange (ETDEWEB)

    Aymoz, G

    2005-03-15

    The atmospheric aerosols play an important role in the earth climatic system. They are also at the origin of air pollution problems in urban areas. However, their influence on the global climactic change, as well as their chemical properties in urban zone, is still very poorly known. One of the main reasons to that is the lack of information on one of the major components of aerosol, the carbonaceous matter. This work focuses on a better knowledge of this particulate carbonaceous matter. This study presents measurements of carbonaceous matter (OC and EC) in aerosol (PM10) performed within the framework of the program POVA, between February 2001 and June 2003 in Chamonix and St Jean de Maurienne (French Alps). This series represents one of the first of this type for basic sites of alpine valleys, characterized by emissions located in the bottom of the valleys and strong temperature inversions in winter, limiting the dispersion of pollutants. The POVA program, centred on the study of air pollution in these valleys, was proposed following the closing of the 'Tunnel du Mont Blanc', in 1999. One of the main objectives was to evaluate the sources of pollution by particles, in particular the share due to the international heavy duty traffic. We could establish that, on the two sites and while the international heavy duty traffic was not restored in the Chamonix Valley, this source represented approximately a third of the observed mass of particles, and was at the origin of a weaker fraction of the carbonaceous matter mass. The extremely primary character of the carbonaceous matter is a remarkable specificity of our sites. The source of carbonaceous matter represented by light vehicles emissions could not be studied. Then, it appears that combustion of biomass (probably from fireplaces) plays an important role, increased in the case of low temperatures, on the levels of pollution by particles. Lastly, the potential impact of the semi-volatile matter condensation at the low temperatures remains an assumption to be tested. On a more general point of view, several results can be pointed out concerning the organic matter: 1. The conversion factor of organic carbon mass to organic matter mass is undoubtedly very variable for a given site (in particular, its variability is probably largely higher than 0,2). 2. The generally allowed assumptions for the calculation of the secondary fraction of OC appeared false in the case of our study, and the method seems in the general case very dubious. 3. The soluble fraction of OC is very important on our sites. The primary source of biomass combustions is an important primary source of WSOC. This result is in disagreement with the general assumption that WSOC is mostly with a secondary origin. (author)

  6. Presentation of the health impact evaluation study of atmospheric emissions of a major coal combustion installation; Mise a jour de l'etude d'evaluation de l'impact sur la sante des rejets atmospheriques des tranches charbon d'une grande installation de combustion

    Energy Technology Data Exchange (ETDEWEB)

    Bonnard, R

    2004-12-15

    In the framework of a working group on the major installations, a study has been realized on a today coal combustion installation. The direct risk by inhalation and the risks bond to indirect exposure of atmospheric releases were analyzed. The calculation method is explained and the uncertainties are discussed to present the results. (A.L.B.)

  7. Application of the 'CORINAIR' method for the estimation of atmospheric pollution due to the Park ONE thermal power plants in Morocco; Application de la methode 'CORINAIR' pour l'evaluation de la pollution atmospherique due au centrales thermiques du parc ONE du Maroc

    Energy Technology Data Exchange (ETDEWEB)

    Benzha, F.; Tahiri, M.; Souabi, S.; Darif, A.; Khatami, A. [University of Hassan 2, Mohammadia (Morocco)

    2009-07-01

    Burning oil, gas, coal and pet coke are the main source of gaseous and particulate emissions. In Morocco, the production of electricity is largely dependent on fossil fuels that are highly polluting. In this work the authors assess the impact of these pollutants on the environment, a study which aims to know the emission levels from the power stations of the National Office of Electricity (ONE) in Morocco.

  8. Bulky PAH-DNA induced by exposure of a co-culture model of human alveolar macrophages and embryonic epithelial cells to atmospheric particulate pollution; Adduits encombrants a l'ADN dans des cocultures de cellules pulmonaires humaines exposees a une pollution atmospherique particulaire

    Energy Technology Data Exchange (ETDEWEB)

    Abbas, Imane; Garcon, Guillaume; Billet, Sylvain; Shirali, Pirouz [Universite Lille Nord de France - Lille (France); Unite de Chimie Environnementale et Interactions sur le Vivant, MREI, Universite du Littoral Cote d' Opale, Dunkerque (France); Andre, Veronique; Le Goff, Jeremie; Sichel, Francois [GRECAN, Universite de Caen Basse-Normandie et centre Francois Baclesse, Caen (France); Roy Saint-Georges, Francoise; Mulliez, Philippe [Service de Pneumologie, Hopital Saint-Philibert, GHICL, Lille (France)

    2012-01-15

    Because of their deep penetration in human lungs, fine airborne particulate matter were described as mainly responsible for the deleterious effects of exposure to air pollution on health. Organic constituents are adsorbed on particles surface and, after inhalation, some (polycyclic aromatic hydrocarbons, PAHs) can be activated into reactive metabolites and can bind to DNA. The formation of bulky DNA adducts has been researched after exposure of mono-and co-cultures of alveolar macrophages (AM) and human embryonic human lung epithelial (L132), to fine air pollution particulate matter Air samples have been collected with cascade impactor and characterized: size distribution (92.15% < 2.5{mu}.m), specific surface area (1 m{sup 2}/g), inorganic (Fe, AI, Ca, Na, K, Mg, Pb, etc.) and organic compounds (PAHs, etc.). {sup 32}P post-labeling method was applied to detect bulky DNA adducts in AM and L132, in mono-and co-cultures, 72 h after their exposure to atmospheric particles at their Lethals and Effects concentrations or (LC or CE) to 50% (i.e. MA: EC{sub 50} = 74.63 {mu}g/mL and L132: LC-5-0 = 75.36 {mu}g/mL). Exposure to desorbed particles (MA: C1= 61.11 {mu}g/mL and L132 : C2 = 61.71 {mu}g/mL) and B[a]P (1 {mu}M) were included. Bulky PAH-DNA adducts were detected in AM in mono-culture after exposure to total particles (Pt), to B[a]P and desorbed particles (Pd). Whatever the exposure, no DNA adduct was detected in L132 in mono-culture. These results are coherent with the enzymatic activities of cytochrome P450 l Al in AM and L132. Exposure of co-culture to Pt, or Pd induced bulky adducts to DNA in AM but not in L132. Exposure to B[a]P alone has altered the DNA of AM and L132, in co-culture. Exposure to Pt is closer to the environmental conditions, but conferred an exposure to amounts of genotoxic agents compared to studies using organic extracts. The formation of bulky DNA adducts was nevertheless observed in AM exposed to Pt, in mono- or co-culture, indicating that they were competent in terms of metabolic activation of PAHs. The DNA damage in the L132 in co-culture following exposure to B[a]P have suggested that some PAH metabolites generated by the MA could be have a genotoxic action on L132. (authors)

  9. Mutational pattern of TP53 tumor suppressor gene in human lung cells exposed to air pollution PM{sub 2.5}; Spectre mutationnel de TP53 en reponse a une exposition in vitro a un aerosol atmospherique particulaire PM{sub 2,} {sub 5}

    Energy Technology Data Exchange (ETDEWEB)

    Billet, Sylvain; Paget, Vincent [Universite Lille Nord de France, Lille (France); Unite de Chimie Environnementale et Interactions sur le Vivant, Maison de la Recherche en Environnement Industriel, Universite du Littoral Cote d' Opale, Dunkerque (France); GRECAN, Universite de Caen Basse-Normandie et Centre Regional de Lutte Contre le Cancer Francois Baclesse, Caen (France); Garcon, Guillaume; Verdin, Anthony; Shirali, Pirouz [Universite Lille Nord de France, Lille (France); Unite de Chimie Environnementale et Interactions sur le Vivant, Maison de la Recherche en Environnement Industriel, Universite du Littoral Cote d' Opale, Dunkerque (France); Andre, Veronique; Heutte, Natacha; Sichel, Francois [GRECAN, Universite de Caen Basse-Normandie et Centre Regional de Lutte Contre le Cancer Francois Baclesse, Caen (France)

    2012-01-15

    Environmental exposure to fine airborne particulate matter (PM 2.5) is thought to be responsible for cardiopulmonary diseases, including lung cancer. However, the mechanisms of action potentially involved in PM{sub 2.5} toxicity are not yet fully described. Mutations in the TP53 gene are the most common alterations in human solid tumors. TP53 mutational patterns have sometimes been linked to carcinogen exposure. The purpose of this study was to determine the mutations that alter the functionality of this transcription factor in a model of human epithelial lung cells (A549) exposed to the fine particulate fraction (PM{sub 2.5}) of an atmospheric aerosol sampled under urban and industrial influences. PM{sub 2.5} was collected in Dunkerque City by cascade impaction. Its physicochemical characterization revealed the presence of many inorganic and organic compounds, including some that are known for their toxicity. The search for mutations altering the functionality of the P53 protein was performed 72 h after exposure of A549 cells to PM{sub 2.5} at its lethal concentration at 50% (LC{sub 50}, 118.60 {mu}g/mL = 31.63 {mu}g/cm{sup 2}), using the Functional Analysis of Separated Alleles in Yeast (FASAY). Sixteen mutations altering P53 function were detected after A549 cells exposure to the collected PM{sub 2.5}: eight deletions of one or two nucleotides and eight nucleotide substitutions, mainly transitions A > G and G > A. These mutations are described in the literature as possibly caused by endogenous mechanisms, such as oxidative stress. This kind of alteration can be induced by metal content of the PM{sub 2.5}, as well as by metabolic activation of the organic compounds coated onto its surface. Involvement of oxidative stress in TP53 mutations was confirmed by the detection of an oxidative DNA adduct, 8-hydroxy-2'-deoxyguanosine (8-OHdG), in A549 cells exposed to the collected PM. (authors)

  10. Determination of some fundamental characteristics of Geiger-Mueller counters. Applications to the study of delayed particles from cosmic-ray shower; Sur la determination de quelques caracteristiques fondamentales de compteurs de geiger-muller applications a l'etude des particules retardees des gerbes atmospheriques du rayonnement cosmique

    Energy Technology Data Exchange (ETDEWEB)

    Picard, E [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1954-06-15

    After some historic recalls, the different phases of discharge of a Geiger-Mueller counter is studied. It measures, by oscillograph method, the time between the flow of a particle through a determined area of the counter and the response of the associated amplifier. This time length is composed by the latency period and the delay itself which depends on the amplifier sensitivity. The selection of particles which generate a discharge in the studied counter is obtained with a two coincidence counters telescope in which the aperture is limited by four counters in anticoincidence with the first two counters. The measures have been done with different distance values and an overvoltage V{sub s} which was applied to the counter. The dead time of a GM counter is also measured with a delayed coincidences method. The counter pulses which supply the coincidence circuit are delivered directly or with a known and variable delay. This method allows also to study the spurious pulses which are due to the positive ions impact on the counter cathode. Results for counters working in different conditions are given. It describes the system to limit the discharge which induces the increase of the life working of a counter, the decrease of its dead time and the reduction of the number of spurious pulses. In a second part, it describes the system to study the time correlation between different particles of the cosmic ray. An experiment concerning the presence of delayed particles in cosmic showers has permitted to specify the superior limit of this phenomena which is directly connected to the presence of heavy nuclear particles in the cosmic shower. (M.P.)

  11. Indoor air pollution: measurement campaign in six dwellings occupied by elderly. Relation between indoor air quality and declared symptoms; Pollution atmospherique interieure: campagne de mesures dans six logements occupes par des personnes agees, relation entre qualite de l'air et symptomes declares

    Energy Technology Data Exchange (ETDEWEB)

    Coelho, C.

    2004-10-15

    The objective of this work was to analyse the indoor air quality in dwellings occupied by old people and to correlate pollutants with life habits and health statement. A sociological survey on 96 elderly people living in social housing was firstly undertaken in order to determine risk factors responsible for poor health. Then measurements of several pollutants (CO{sub 2}, CO, NO{sub X}, O{sub 3}, COVT, PM2,5, PS>0,3 and aero-biological counts) were carried out during five days in six typical dwellings. Results were analyzed in the light of activities and reported symptoms by the old people. Besides discomfort due to CO{sub 2} accumulation, several pollutants with levels near or over guidelines were identified in particular particulate matter under 1 {mu}m, airborne microbiological counts, permanent TVOC levels. Dust was at the origin of cough, eyes and throat irritations and flows of the nose, and fungi and bacteria seem to be responsible for skin irritations, digestive disorders, sneezes and rhinitis. However, most symptoms appeared after 10 hours of exposure time for people of all ages. The risks factors were amplified by ignorance about the hazard of inadequate ventilation. Experiences in laboratory were also performed to complement some observations and introduce further research. (author)

  12. Is acidification still a major air pollution concern? The analysis from the French Agriculture and Fishing Department; Le probleme de l`acidification d`origine atmospherique est-il toujours d`actualite? l`analyse du Ministere de l`agriculture et de la peche

    Energy Technology Data Exchange (ETDEWEB)

    Landmann, G. [Ministere de l`Agriculture et de la Peche, 75 - Paris (France). Direction de l`espace rural et de la foret

    1997-12-31

    The acidification issues related to agriculture and their effects on ecosystems are analyzed: through ammonium emissions, agriculture is largely contributing to acidification and eutrophication of ecosystems; enhancements of cultivation and fertilization techniques have been achieved in order to decrease these emissions; natural soils and waters, and more especially forests, are still affected by acid and nitrogenous pollution, leading to modifications with soil degradation and eutrophication of forest soils and waters

  13. Study of atmospheric photo-oxidation mechanisms by concentration measurements of peroxy radicals by chemical amplification in the laboratory and in the atmosphere; Etudes des mecanismes de photooxydation atmospherique par mesure des radicaux peroxyles par amplification chimique au laboratoire et dans l'atmosphere

    Energy Technology Data Exchange (ETDEWEB)

    Pinceloup, St.

    2002-10-01

    In this thesis, we have continued to develop and to automate a chemical amplifier, with which measurements of peroxy radicals (RO{sub 2}) under real and simulated atmosphere can be made in order to better understand the atmospheric oxidation processes. Firstly, some experiments in laboratory have confirmed the inhibitory effect of water vapour on the chain length of the chemical amplifier, which is a technique of measuring peroxy radicals used by the LCSR. We have shown that the decrease in the chain length is primarily due to the increase of the HO{sub 2} loss to the wall of the amplifier in presence of H2{sub O} and to the HO{sub 2} loss in the gas phase by a minority way of the reaction NO + HO{sub 2} producing HNO{sub 3}. This reaction was studied using a turbulent flow reactor coupled to an ion molecule reactor with mass spectrometric detection. Secondly, the photo-oxidation of formaldehyde has been studied in the atmospheric simulation chamber of the LISA at Creteil coupled with the chemical amplifier. This study has allowed us to determine realistic values of the photolysis constants of radical and molecular ways of formaldehyde and the thermal decomposition constant at 298 K of the adduct HOCH{sub 2}O{sub 2} formed by reaction of HO{sub 2} with HCHO, thanks to the peroxy radicals measurements effectuated. Finally, we have participated in the field campaign, ESCOMPTE, during which concentrations of RO{sub 2}, NO, NO{sub 2} and ozone were measured continuously at the Dupail site. The measured concentrations were typical of a rural site. Using these measurements and those accomplished by other teams, we have determined the production rate of ozone by the radical budget method. The results show that the local photochemical production was important on the Dupail site and controlled essentially by the nitrogen oxides (NO, NO{sub 2}) characterizing a site free of emissions. (author)

  14. Study of the carbonaceous fraction of the atmospheric aerosol in Chamonix and St Jean de Maurienne: seasonal evolutions, source and chemical characteristics; Etude de la fraction carbonee de l'aerosol atmospherique a Chamonix et St Jean de Maurienne: evolutions saisonnieres, sources et caracteristiques chimiques

    Energy Technology Data Exchange (ETDEWEB)

    Aymoz, G.

    2005-03-15

    The atmospheric aerosols play an important role in the earth climatic system. They are also at the origin of air pollution problems in urban areas. However, their influence on the global climactic change, as well as their chemical properties in urban zone, is still very poorly known. One of the main reasons to that is the lack of information on one of the major components of aerosol, the carbonaceous matter. This work focuses on a better knowledge of this particulate carbonaceous matter. This study presents measurements of carbonaceous matter (OC and EC) in aerosol (PM10) performed within the framework of the program POVA, between February 2001 and June 2003 in Chamonix and St Jean de Maurienne (French Alps). This series represents one of the first of this type for basic sites of alpine valleys, characterized by emissions located in the bottom of the valleys and strong temperature inversions in winter, limiting the dispersion of pollutants. The POVA program, centred on the study of air pollution in these valleys, was proposed following the closing of the 'Tunnel du Mont Blanc', in 1999. One of the main objectives was to evaluate the sources of pollution by particles, in particular the share due to the international heavy duty traffic. We could establish that, on the two sites and while the international heavy duty traffic was not restored in the Chamonix Valley, this source represented approximately a third of the observed mass of particles, and was at the origin of a weaker fraction of the carbonaceous matter mass. The extremely primary character of the carbonaceous matter is a remarkable specificity of our sites. The source of carbonaceous matter represented by light vehicles emissions could not be studied. Then, it appears that combustion of biomass (probably from fireplaces) plays an important role, increased in the case of low temperatures, on the levels of pollution by particles. Lastly, the potential impact of the semi-volatile matter condensation at the low temperatures remains an assumption to be tested. On a more general point of view, several results can be pointed out concerning the organic matter: 1. The conversion factor of organic carbon mass to organic matter mass is undoubtedly very variable for a given site (in particular, its variability is probably largely higher than 0,2). 2. The generally allowed assumptions for the calculation of the secondary fraction of OC appeared false in the case of our study, and the method seems in the general case very dubious. 3. The soluble fraction of OC is very important on our sites. The primary source of biomass combustions is an important primary source of WSOC. This result is in disagreement with the general assumption that WSOC is mostly with a secondary origin. (author)

  15. Contributions of the CEA-Valduc Centre control to the understanding of the transfers of atmospheric tritiated water into the different parts of the environment; Apports de la surveillance du Centre CEA-Valduc sur la connaissance des transferts de l'eau tritiee atmospherique dans les differents compartiments de l'environnement

    Energy Technology Data Exchange (ETDEWEB)

    Guetat, P.; Vichot, L. [CEA Valduc, UMR, 21 - Is-sur-Tille (France); Tognelli, A. [CEA Bruyeres-le-Chatel, 91 (France)

    2009-07-01

    After a description of the geological environment of the Valduc Centre dedicated to tritium purification and tritiated waste processing and storage, this document presents the assessment of quantities of tritiated water released by the Valduc Centre and of their evolution in the hydro-geological environment. It provides in situ macroscopically observed data on the transfer mechanisms of water into the different parts of the environment and into the food chain by means. This is made possible by the exceptional traceability of tritiated water. Finally, a comparison between computational models and experimental measurements is given

  16. Association between ambient carbon monoxide levels and hospitalizations for congestive heart failure in the elderly in 10 canadian cities; Association entre les niveaux atmospheriques de monoxyde de carbone et les hospitalisations pour insuffisance cardiaque congestive des personnes agees dans 10 villes canadiennes

    Energy Technology Data Exchange (ETDEWEB)

    Burnett, R.T.; Dales, R.E.; Brook, J.R.; Raizenne, M.E.; Krewski, D.

    2001-01-01

    In 1995, two studies, realized in the USA, showed the relation between the carbon monoxide content in the urban air and the hospitalization of elderly people for congestive heart failure. This study, realized this time in the Canada, take again the protocol of one of them increasing the period (4 to 11 years) and the number of concerned towns. (A.L.B.)

  17. High resolution and high precision absorption spectroscopy using high finesse cavities: application to the study of molecules with atmospheric interest; Cavites de haute finesse pour la spectroscopie d'absorption haute sensibilite et haute precision: application a l'etude de molecules d'interet atmospherique

    Energy Technology Data Exchange (ETDEWEB)

    Motto-Ros, V

    2005-12-15

    High finesse cavities are used to measure very weak absorption features. Two different methodologies are investigated and applied to the study of molecules with atmospheric interest. First, Continuous Wave - Cavity Ring Down Spectroscopy (CW-CRDS) is used to study the atmospheric spectra of water vapour in the near infrared range. These measurements are performed for temperature and pressure of atmospheric relevance for DIAL applications (Differential Absorption Lidar). This study, financed by the European Space Agency (ESA), goes with the WALES mission (Water Vapour Lidar Experiment in Space). The experimental setup was conceived in order to control pressure, temperature and relative humidity conditions. A particular attention is done to characterize and describe the spectrometer. Then, measurements of red Oxygen B band are performed to demonstrate the huge performance of Optical Feedback Cavity Enhanced Absorption Spectroscopy (OF-CEAS). The desired optical feedback is obtained by light injection into the high finesse cavity through a glass plate placed inside the cavity and closed to the Brewster angle. We show a measurement dynamical range of 5 orders of magnitude (10{sup -5} to 10{sup -10} /cm) and a sensitivity of 10{sup -10} /cm/{radical} Hz. Also, sampling absorption spectra by the super linear cavity frequency comb allows very precise frequency measurements. This is demonstrated by the determination of Oxygen pressure shifts with an absolute accuracy of around 5 x 10{sup -5} cm{sup -1}/atm. To our knowledge, we provide the highest accuracy ever reported for this parameter. (author)

  18. Inventory of atmospheric pollutant and greenhouse gas emissions in France. Sectoral series and extended analyses - SECTEN Format, April 2011; Inventaire des emissions de polluants atmospheriques et de gaz a effet de serre en France. Series sectorielles et analyses etendues - Format SECTEN, avril 2011

    Energy Technology Data Exchange (ETDEWEB)

    Chang, Jean-Pierre; Fontelle, Jean-Pierre; Serveau, Laetitia; Allemand, Nadine; Jeannot, Coralie; Andre, Jean-Marc; Joya, Romain; Deflorenne, Emmanuel; Martinet, Yann; Druart, Ariane; Mathias, Etienne; Gavel, Antoine; Nicco, Laetitia; Gueguen, Celine; Prouteau, Emilie; Jabot, Julien; Tuddenham, Mark; Jacquier, Guillaume; Vincent, Julien

    2011-04-15

    This report supplies an update of emissions into the atmosphere in mainland France under the SNIEPA in accordance with the 'SECTEN' format defined by CITEPA. This report aims to reconstitute emissions broken down in accordance with the traditional economic sectors such as industry, residential/tertiary sector, agriculture, etc. (cf. Annex 2 for the corresponding links between SECTEN sectors and sub-sectors, and the SNAP nomenclature). Unless otherwise indicated, the results cover the period 1990-2010 (estimations for 2010 are preliminary), but also go back further in time: to 1980 for certain substances covered by the different protocols adopted under the 1979 UNECE Convention on Long-Range Transboundary Air Pollution. For other substances traditionally monitored by CITEPA for many years, the results go back to 1960 (SO{sub 2}, NO{sub x}, CO{sub 2}, CO). Data are presented for 28 different substances in total and various indicators such as those concerning acidification or the greenhouse effect. The report shows that for most substances, emissions have been drastically reduced over the last 10 or 20 years, especially during the period 1990-2009: Very sharp decrease (over 40%) SO{sub 2}, NMVOCs, CO, SF{sub 6}, PFCs in CO{sub 2} equivalent, As, Cd, Cr, Hg, Ni, Pb, Zn, dioxins and furans, PAHs, HCB, PCBs, PM{sub 2.5} and PM{sub 1.0}, Sharp decrease (between 20 and 40%) NO{sub x}, N{sub 2}O, Se, TSP, PM{sub 10} and acid equivalent index, Considerable decrease (between 5 and 20%) NH{sub 3}, CH{sub 4} without LULUCF, CO{sub 2} without LULUCF, Cu and the global warming potential index without LULUCF, Stabilisation (between -5 and +5%) No substance, Very sharp increase (over 40%) HFCs in CO{sub 2} equivalent. For more than 2/3 of substances, emission levels in 2009 were the lowest since records began (1960 to 1990 depending on the substances). For the most part of atmospheric pollutants (except the greenhouse gases), the preliminary estimations for year 2010 look rather favorable as far as the estimated level is below than observed in 2009. Regarding the greenhouse gases, the trend is rather directed in a light increase (2, 2 % between 2009 and 2010 for the CO{sub 2} and 1, 4 % in terms of PRG) because of the year 2009 is very marked by a context of economic crisis and a resumption begun in 2010. The preliminary estimations for year 2010 should therefore be considered with caution because they need to be consolidated. The results are presented at national level for each of the main sectors defined in the SECTEN format. A more detailed breakdown of each main sector is provided for the period 1990-2009. Results also focus on the different energy products and several analyses provide additional information on NMVOCs, PAHs HFCs, PFCs, global warming potential and particular sources, such as transport and off-road mobile sources (generators, machinery and vehicles used in construction, industry, agriculture and forestry, as well as household and gardening machinery). The report contains indications regarding the targets to which France has committed itself under international conventions and EU directives, in particular for climate change and for transboundary air pollution and air quality. These results show that on the whole emission trends observed are encouraging and especially reflect the reduction actions implemented. The table below summarises total emissions over the period 1990-2010 for all the above mentioned substances, as well as indicators concerning acidification and the greenhouse effect

  19. Study of the coastal atmospheric boundary layer during ESCOMPTE 2001. Evaluation and improvement of the efficiency of a UHF radar; Etude de la couche limite atmospherique cotiere durant ESCOMPTE 2001. Evaluation et amelioration des performances d'un radar UHF

    Energy Technology Data Exchange (ETDEWEB)

    Puygrenier, V.

    2005-12-15

    Forecasting of pollution events was the main objective of the ESCOMPTE-2001 campaign, which took place in the Marseille/Fos/Berre heterogeneous area (southeastern France) in the early summer 2001. This goal requires good understanding and taking into account, by physico-chemical numerical models, of the physical processes in the Atmospheric Boundary Layer (ABL), in which pollutants are emitted, transported and diffused. In the ESCOMPTE-2001 campaign context, this work was devoted to study the low troposphere during sea breeze events, related to meteorological conditions responsible for poor air quality of coastal areas. It presents notably an oscillation of the sea breeze intensity and competitions of locals and regional sea breeze, which change the advective time of the marine air above the continental surface and thus influence the ABL development and its pollutants concentration. This study is based principally on the network of four UHF wind profilers radars set up on the coastal area of Marseille/Fos/Berre, allowing a continuous three-dimensional description of the sea breeze flow and the ABL. For the needs of this phenomenological work, methodological developments was realized to improve the measurement of ABL turbulent properties with UHF radars (terms of turbulent kinetic energy budget) and the use of wind profilers network for the study of pollutants plumes trajectory-graphy. (author)

  20. Measurement equipment fitted in light vehicles used for supervision and reconnaissance by the radioprotection service at Cadarache; Equipement de mesures des vehicules legers de surveillance et de reconnaissance de la S. P. R. Cadarache

    Energy Technology Data Exchange (ETDEWEB)

    Galanti, A; Thirion, C; Grandin, M [Commissariat a l' Energie Atomique, Cadarache (France). Centre d' Etudes Nucleaires

    1967-07-01

    Normally, these vehicles are used to reinforce the atmospheric supervision network based on four fixed stations. In the case of a planned atmospheric discharge they have to control contamination levels and check that these conform to the scattering forecasts. In the case of accidental atmospheric pollution, their role is to rapidly demarcate the pollution zones and to follow the evolution of this pollution. The main measurements carried out are: - Detection of ambient gamma radiation from 10 {mu}rad/hr to 1000 rad/hr. - Detection of the alpha and gamma contamination. - Detection of the beta and gamma contamination of the ground. (authors) [French] En temps normal, ces vehicules ont pour but de completer le reseau de surveillance atmospherique qui s'appuie sur quatre stations fixes. En cas de rejet atmospherique concerte, ils doivent controler les niveaux de contamination et verifier qu'ils sont conformes aux previsions de diffusion. En cas de rejet atmospherique accidentel, ils ont pour mission de delimiter rapidement les zones de pollution et tenir a jour leur evolution. Les principales mesures effectuees sont: - Detection des gamma ambiants de lO {mu}rad/h a 1000 rad/h. - Detection de la contamination atmospherique en alpha et beta. - Detection de la contamination du sol en beta et gamma. (auteurs)

  1. Containment for Heavy-Water Gas-Cooled Reactors; Le Confinement des Reacteurs a Eau Lourde Refroidis par Gaz

    Energy Technology Data Exchange (ETDEWEB)

    Verstraete, P.; Lehmann, D.; Lafitte, R. [Bonard et Gardel, Ingenieurs-Conseils, Lausanne (Switzerland)

    1967-09-15

    par gaz sont passes en revue dans le but d'etablir les specifications des enceintes de confinement en fonction des conditions des sites disponibles en Suisse pour la construction de centrales nucleaires. Ces specifications sont etablies d'apres les taux de dose consideres comme admissibles pour les populations vivant aux environs de la centrale en cas d 'accident grave du reacteur, en se basant sur des conditions meteorologiques et demographiques representatives de la plupart des sites du pays. Differents modes de construction de l ' enceinte de confinement, prenant en consideration les conditions qui s'etablissent dans l'enceinte a la suite de l'accident maximal concevable du reacteur, sont consideres. Les enceintes etudiees sont les suivantes: beton precontraint; beton precontraint avec coupole d'acier; beton precontraint avec peau d' etancheite interieure en acier; acier avec ecran lateral en beton pour la protection contre les radiations; et double confinement. Le degre d'etancheite des enceintes etudiees a ete considere comme une caracteristique lie e au mode de construction particulier et non comme une valeur prescrite en vue de laquelle la construction devait etre adaptee. Les caracteristiques d'etancheite de chaque enceinte sont estimees et les prix de chaque construction ont ete determines sur la base de plans precis avec le concours de diverses entrepises specialisees. L'estimation de l'efficacite des differentes enceintes, sous l'an gle de la securite, a ete faite en prenant en consideration differentes procedures en cas d' accident parmi lesquelles on citera principalement le rejet atmospherique, au travers de filtres adequats, et la decontamination de l 'atmosphere de l 'enceinte par recyclage dans des batteries de filtres. Une dizaine de cas, correspondant a differentes combinaisons de modes de construction et procedures en cas d'accident, font l 'objet d'une comparaison tres detaillee qui a ete realisee grace a un programme pour ordinateur electronique

  2. Five years program execution outcome; Bilan d'execution du plan quinquenal

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1983-07-01

    This document presents realized activities during five years program in mine field and petroleum (1979-1983). It involves mining and petroleum researches and mining productions. [French] Le document presente les activites realisees dans le domaine des mines et du petrole pendant les 5 annees du plan quinquenal (1979-1983). Il s'agit des recherches minieres et petrolieres et des productions minieres.

  3. Comprendre la ville par la chrono-chorématique: un essai prometteur

    Directory of Open Access Journals (Sweden)

    Roger Brunet

    2010-12-01

    Full Text Available Cet ensemble de chrono-chorématique urbaine est exemplaire par ses méthodes et par ses résultats. Travail pluridisciplinaire de recherche de grande qualité éthique et esthétique, il livre une approche efficace à la compréhension du développement et des structures urbaines. Il ouvre de larges perspectives comparatives et des voies d’amélioration des modèles généraux de l’élaboration et des transformations des espaces urbains, en relation avec les modèles généraux de la production de l’espace géographique. On souhaite que se multiplient les études de cas, et qu’elles s’étendent à d’autres milieux urbains, à d’autres cultures.

  4. Download this PDF file

    African Journals Online (AJOL)

    user1

    Prévalence de la toux chez les adultes dans une communauté urbaine au Nigeria ... All types of cough were common in those aged <45 years, unskilled workers, low ..... Learning, and Performance Journal ... World Health Organisation, 2007.

  5. Projet reproductible de recyclage des déchets à Gianyar, à Bali ...

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

    En Indonésie, les secteurs urbains produisent quelque 55 000 tonnes de déchets solides chaque jour, et on estime que ce volume triplera d'ici 2025. Seulement de 50 % à 60 % des déchets urbains environ sont recueillis, et les décharges sont pour la plupart à ciel ouvert. Les efforts de gestion des déchets sont minés par ...

  6. Diversité et dynamique des Salmonella isolées de la laitue (Lactuca ...

    African Journals Online (AJOL)

    SARAH

    30 nov. 2017 ... Objectif : Au Niger, l'agriculture maraîchère réalisée dans les zones urbaines et péri-urbaines utilise les eaux usées souvent très ... La production des laitues a pour principale source d'arrosage, les eaux des caniveaux. (41,67%). ...... avec des antiseptiques et ou des désinfectants comme l'eau de javel ...

  7. indonesia : tous les projets | Page 4 | CRDI - Centre de recherches ...

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

    Programme: Climate Change. Financement total : CA$ 1,200,000.00. Reconstruction après le tsunami dans ... Gestion décentralisée des déchets solides urbains en Indonésie. Projet. En Indonésie, les zones urbaines produisent 55 000 tonnes de déchets solides par jour, et on s'attend à ce que ce volume triple d'ici à 2025.

  8. Publications | Page 154 | CRDI - Centre de recherches pour le ...

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

    Armer les villes contre la faim : Systèmes alimentaires urbains durables. Le XXe siècle a été le témoin d'une croissance massive des populations urbaines. En 1990, le tiers des habitants de la planète vivaient dans des villes de plus d'un million d'habitants. En outre, la faim et la malnutrition.

  9. Publications | Page 17 | CRDI - Centre de recherches pour le ...

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

    ... facteurs de violence liée au sexe en milieu urbain au Pakistan. Dans les centres urbains au Pakistan, le sexe et la violence interagissent de manière inattendue et influencent profondément la vie des femmes et des hommes, comme le démontre une étude menée à Karachi par l'Institute of Business Administration.

  10. Réinstallations involontaires : étude transnationale sur les inégalités ...

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

    Réinstallations involontaires : étude transnationale sur les inégalités et la pauvreté urbaines. Il se produit des déplacements involontaires de populations en milieu urbain lorsque des gens sont forcés de partir de chez eux, que ce soit à cause d'un projet de développement, d'un conflit ou d'une catastrophe naturelle.

  11. La ségrégation sociale à Athènes

    Directory of Open Access Journals (Sweden)

    Thomas MALOUTAS

    1997-12-01

    Full Text Available La représentation synthétique de la structure socioprofessionnelle de la Région Urbaine d'Athènes permet de faire apparaître la morphologie géographique détaillée de la ségrégation urbaine ; cette morphologie peut devenir un élément essentiel d'interprétation des processus de ségrégation.

  12. Pondération de la base juridique du droit au logement au Zimbabwe ...

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

    13 déc. 2016 ... La criminalité et la pauvreté au Ghana urbain. La manière dont la criminalité et la pauvreté interagissent a été étudiée et débattue dans la littérature de recherche occidentale, mais on sait pe. Voir davantageLa criminalité et la pauvreté au Ghana urbain ...

  13. Programme de bourse de recherche sur les questions touchant la ...

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

    Criminalité et violence dans les zones urbaines d'Amérique latine : étude comparative (Brésil, Colombie, Mexique). Le projet examinera la dynamique de la criminalité, de la violence et du trafic de stupéfiants dans des centres urbains de trois pays de l'Amérique latine : le Brésil (Rio de Janeiro), la.

  14. Le CRDI au Forum de la révolution verte en Afrique 2017 | CRDI ...

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

    13 oct. 2017 ... La criminalité et la pauvreté au Ghana urbain. La manière dont la criminalité et la pauvreté interagissent a été étudiée et débattue dans la littérature de recherche occidentale, mais on sait pe. Voir davantageLa criminalité et la pauvreté au Ghana urbain ...

  15. Un logiciel pour la justice | CRDI - Centre de recherches pour le ...

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

    28 oct. 2010 ... La criminalité et la pauvreté au Ghana urbain. La manière dont la criminalité et la pauvreté interagissent a été étudiée et débattue dans la littérature de recherche occidentale, mais on sait pe. Voir davantageLa criminalité et la pauvreté au Ghana urbain ...

  16. IDRC at the Africa Green Revolution Forum 2017 | CRDI - Centre de ...

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

    13 oct. 2017 ... La criminalité et la pauvreté au Ghana urbain. La manière dont la criminalité et la pauvreté interagissent a été étudiée et débattue dans la littérature de recherche occidentale, mais on sait pe. Voir davantageLa criminalité et la pauvreté au Ghana urbain ...

  17. Stratégies fondées sur les citoyens - collaboration avec les ...

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

    Criminalité et violence dans les zones urbaines d'Amérique latine : étude comparative (Brésil, Colombie, Mexique). Le projet examinera la dynamique de la criminalité, de la violence et du trafic de stupéfiants dans des centres urbains de trois pays de l'Amérique latine : le Brésil (Rio de Janeiro), la.

  18. Urban Violence in Kenya's Transition to Pluralist Politics, 1982-1992 ...

    African Journals Online (AJOL)

    Dans plusieurs parties de l'Afrique on note une escalade de la violence urbaine. Les études théoriques à ce sujet n'abordent principalement que les manifestations de violence dans les quartiers pauvres, et la criminalité urbaine avec ses actes de violence. Il y a un besoin urgent de focaliser l'attention sur les causes ...

  19. Pauvreté, croissance démographique et violence chez les jeunes ...

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

    28 avr. 2016 ... La criminalité et la pauvreté au Ghana urbain. La manière dont la criminalité et la pauvreté interagissent a été étudiée et débattue dans la littérature de recherche occidentale, mais on sait pe. Voir davantageLa criminalité et la pauvreté au Ghana urbain ...

  20. Weighing the legal basis for housing rights in Zimbabwe | CRDI ...

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

    13 déc. 2016 ... La criminalité et la pauvreté au Ghana urbain. La manière dont la criminalité et la pauvreté interagissent a été étudiée et débattue dans la littérature de recherche occidentale, mais on sait pe. Voir davantageLa criminalité et la pauvreté au Ghana urbain ...

  1. Profil de la ville : Transformation et injustice à Mumbai | CRDI ...

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

    13 déc. 2016 ... La criminalité et la pauvreté au Ghana urbain. La manière dont la criminalité et la pauvreté interagissent a été étudiée et débattue dans la littérature de recherche occidentale, mais on sait pe. Voir davantageLa criminalité et la pauvreté au Ghana urbain ...

  2. Agropolis : The Social, Political and Environmental Dimensions of ...

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

    L'agriculture urbaine est une pratique de plus en plus répandue dans les villes du monde entier, et il est crucial d'en assurer la viabilité, en particulier pour les pauvres qui vivent en milieu urbain dans les pays en développement. Ce livre présente les premières constatations de projets de recherche originaux menés sur le ...

  3. Migration et commerce de distribution dans les villes ouest-africaines

    African Journals Online (AJOL)

    La migration et le commerce de distribution agissent en synergie sur la structuration de l'espace urbain. Ils apparaissent comme des instruments privilégiés d'analyse des questions relevant de l'économie spatiale (Dupont, 1986). Leur impact sur la dynamique urbaine participe à la création d'activités et d'investissements ...

  4. 293-IJBCS-Article-Keambou Christian

    African Journals Online (AJOL)

    Dr Gatsing

    locaux des zones urbaines et rurales de l'Ouest-Cameroun, il a été procédé à la collecte de 640 œufs de poule locale équitablement ... légère supériorité des performances de croissance de la poule en zone urbaine, ce qui à l'échelle d'une production industrielle ne ..... productives de pondeuses d'œufs à coquilles brunes.

  5. Résultats de recherche | Page 24 | CRDI - Centre de recherches ...

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

    Cette recherche porte sur les changements qui se sont produits dans la violence criminelle en milieu urbain concurremment à l'évolution sociopolitique de la Côte d'Ivoire depuis les années 1990. Projet. Nature et acteurs de la violence urbaine en République démocratique du Congo. La République démocratique du ...

  6. APONTAMENTOS SOBRE O PLANEJAMENTO URBANO RELATIVO AO USO DA ÁGUA EM OURINHOS-SP

    Directory of Open Access Journals (Sweden)

    Franciele Miranda Ferreira Dias

    2017-03-01

    Le travail examine dans le contexte de la Géographie urbaine, l'évolution de l'utilisation de l'eau dans Ourinhos - SP, notamment dans la zone urbaine. Ainsi, il fait référence au plan directeur du Padre Lebret du 1955, qui se réfère à la période initiale d'occupation de l'espace urbain de la municipalité. Il y a aussi un effort sur la compréhension du point historique et géographique de vue sur la façon dont la question de l'eau a été traitée dans cette ville, compte tenu de la genèse de Ourinhos jusqu'à ce que les années 1950 mettent l'accent sur l'importance du Rio Paranapanema présenté lors de la genèse le noyau urbain en raison du fait que le lieu de fourniture de matières premières de l'industrie de la poterie locale, étant le même responsable de l'occupation et de l'étalement urbain de la région sud Ourinhos. Mots clés: Plan Directeur; Ourinhos; Géographie Urbaine.

  7. Characterisation and quantification of trace metal elements in atmospheric deposition and particularities in the Aspe valley (Pyrenees): implementation of road traffic air quality indicators; Caracterisation et quantification des elements traces metalliques dans les depots et les particules atmospheriques de la vallee d'Aspe (Pyrenees): Mise en place d'indicateurs de la qualite de l'air lies au trafic routier

    Energy Technology Data Exchange (ETDEWEB)

    Veschambre, S

    2006-04-15

    This study of inputs of trace metal elements (TME) in the Aspe valley (Pyrenees Atlantiques) has two objectives: (1) to define a reference state of metallic contaminants for the monitoring of road traffic emissions since the opening of the Somport tunnel and, (2) to evaluate sources and climatic conditions which contribute to TME inputs in the Aspe valley. To establish air quality indicators, TME (Al, Na, Mg, K, V, Mn, Cr, Zn, Cu, Rb, Cd, Sn, Sb, Ba, Ce, Pb and U) and lead isotopic ratios ({sup 208}Pb/{sup 206}Pb, {sup 206}Pb/{sup 207}Pb and {sup 208}Pb/{sup 207}Pb) were determined in the atmospheric receptors (fresh snow, wet deposition, atmospheric particulates and lichen). Sampling and analyses with ultra clean procedures were employed for TME quantification. Variability of atmospheric receptors studied, allows integration on a daily and pluri-annual temporal scale and a spatial scale in the North-South axis of the valley and as a function of the altitude from the road. The Aspe valley presents a level of contamination characteristic of remote European areas and the metallic contaminants identified are Cd, Sb, Zn, Cu, Pb and Sn. In the low valley, air quality indicators indicate contaminant contributions (i) from local emissions of domestic heat sources, from agricultural burning practices and road traffic, and (ii) from regional anthropogenic sources of waste incinerators, metallurgic industries and urban centres. In altitude, the valley is significantly influenced by wind erosion and long range transport of TME in the Northern Hemisphere. Characterisation of TME and the isotopic ratios of Pb in the Somport tunnel indicate (i) a significant emission of Cu, Sb, Zn and Ba and (ii) an isotopic composition from a slightly radiogenic source even though Pb concentrations indicate low emissions from road traffic emissions. Nevertheless, the low traffic volume in the Aspe valley prevents conclusive evidence of significant contamination from road traffic. (author)

  8. N.3156 National Assembly law project authorizing the approbation of the protocol at the convention of 1979 on the long way transfrontier atmospheric pollution relative to the acidification, the eutrophication and the tropospheric ozone; N.3156 Assemblee Nationale projet de loi autorisant l'approbation du protocole a la convention de 1979 sur la pollution atmospherique transfrontiere a longue distance relatif a la reduction de l'acidification, de l'eutrophisation et de l'ozone tropospherique

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    This document discusses the interest for the France of the approbation of the Goteborg protocol adopted in december 1999. It describes the main dispositions of the protocol relative to the reduction of the acidification and the eutrophication. (A.L.B.)

  9. VLF observations of ionospheric disturbances in association with TLEs from the EuroSprite-2007 campaign

    DEFF Research Database (Denmark)

    NaitAmor, S.; AlAbdoadaim, M. A.; Cohen, M. B.

    2010-01-01

    ) were captured over the Mediterranean Sea by cameras at Pic du Midi (42.94°N, 0.14°E) and at Centre de Recherches Atmospheriques (CRA) in southwestern France (43.13°N, 0.37°E). The cameras observations are compared to collected VLF AWESOME data. We consider early VLF perturbations observed on 12-13, 17...

  10. FTS improvements and connection with a long White cell. Application: H216O intensity measurements around 1200 cm-1

    International Nuclear Information System (INIS)

    Regalia, L.; Oudot, C.; Thomas, X.; Von der Heyden, P.; Decatoire, D.

    2010-01-01

    Acquisition electronics, data software and optics of the Fourier transform spectrometer of the Groupe de Spectrometrie Moleculaire et Atmospherique laboratory have been optimized over the past 5 years. Among the improvements brought on to this system is the optical fitting of 50-m White cell. This cell can be used to achieve absorption path lengths as long as 2 km. This new setup allows us to perform spectroscopic analysis of very small absorption lines.

  11. Dispersion of Pt, Pd and Rh produced by catalytic converters into the roadside and urban environment. Element speciation study; Dispersion dans l'environnement routier et urbain de Pt, Pd, et Rh emis par les pots d'echappement catalytiques. Etude de la speciation des elements

    Energy Technology Data Exchange (ETDEWEB)

    Amosse, J.; Delbos, V. [Centre National de la Recherche Scientifique (CNRS), Lab. de Geodynamique des Chaines Alpines, LGCA, UMR 5025, 38 - Grenoble (France)

    2002-09-01

    This study highlights the dispersion into the French urban environment of platinum group elements (PGEs) used in catalytic converters. Differences were observed between Pt and Rh on the one hand, and Pd on the other one. One experiment, consisting in passing the corrosive gas emissions from engines over the metals heated to 1000 deg. C, showed that Pd was severely corroded by nitrogen oxides. It was concluded that Pd is emitted in nitrate form. Hydrolysis of this nitrate form leads to the formation of soluble species. In situ pH and E{sub h} measurements in the soils concerned confirm this theory when the results are compared with the Pd species predominance diagram. (authors)

  12. Study and optimization of the biodegradation of Polycyclic Aromatic Hydrocarbons (PAHs) and Poly-chloro-biphenyls (PCBs) during the anaerobic and aerobic digestion of long-term contaminated urban sludge; Etude et optimisation de la biodegradation d'hydrocarbures aromatiques polycycliques (HAPs) et de polychlorobiphenyls (PCBs) au cours de la digestion anaerobie et aerobie de boues urbaines contaminees

    Energy Technology Data Exchange (ETDEWEB)

    Trably, E.

    2002-12-15

    This study deals with the behavior of PAHs and PCBs during anaerobic and aerobic digestion of long-term contaminated sludge. Initially, an analytical method of 13 PAHs in sludge was developed to PAH-monitoring in laboratory-scaled bioreactors. For this, the method was optimized and validated for its high accuracy and its high reproducibility. In order to estimate precisely the PAH and PCB biological removal performances of each reactor, it was also proposed a method of analysis of the results based on mass balance. Therefore, it was observed for the first time significant PAHs removal under methanogenic conditions. It was also shown that PAH and PCB removals were limited by the mass transfer kinetics and particularly by the reduction of solids. The anaerobic and aerobic processes were then optimized by improving the PAH diffusion with the enhancement of reactor temperature and with the addition of surfactants and solvent, such as methanol. It was highlighted the great fragility of the methanogenic ecosystems and, on the opposite, the strong potential of the aerobic ecosystem for PAHs biodegradation. Indeed, some aerobic processes were successful in decontaminating sludge significantly (at 45 deg. C or in the presence of methanol). Lastly, the PAH biodegradation was characterized partly by the monitoring of {sup 14}C-radiolabelled compounds and by the molecular identification of the methanogenic archaea species. It was suggested that some archaea microorganisms were implied in PAHs biodegradation under strict anaerobic methanogenic conditions. (author)

  13. Uses of biogas produced by digestion of wastewater sludge. The SIAAP's experience feedback and projects; Utilisation du biogaz issu de la digestion des boues d'epuration des eaux residuaires urbaines. Retour d'experience et projets du SIAAP

    Energy Technology Data Exchange (ETDEWEB)

    Amosse, S. [SIAAP - Dir. du Site Seine Aval, 78 - Maisons Laffite (France); Nedelec, R. [SIAAP, Dir. du Developpement et de la Prospective, 92 - Colombes (France)

    2010-07-01

    The SIAAP, in charge of the purification of the Great Paris wastewaters (8 M inhabitants), handles 2.7 Mm{sup 3}/day. Five wastewater treatment plants permit to dean these wastewaters before they are discharged into the receiving environment: 'Seine Aval' (Acheres, 1,7 Mm{sup 3}/day), 'Seine Amont' (Valenton, 600 000 m{sup 3}/day), 'Seine Centre' (Colombes, 240 000 m{sup 3}/day), 'Seine Gresillons' (Triel-sur-Seine, 100 000 m{sup 3}/day) and 'Marne Aval' (Noisy-Le-Grand, 40 000 m{sup 3}/day). Biogas produced by digestion of sludge provides a part of the energy required by the five sewage treatment works. Energy recovered from biogas have been used by the SAV site since 1940. As soon as the first part of this plant started up, biogas was used as fuel to heat digester, to produce power through biogas engines and to drive blowers. In the 60's and 70's, dual-fuel engines were brought into service, and then in 1992, a gas turbine was installed. Nowadays, a combined heat and power (cogeneration) project is in progress with the installation of two gas turbines, each generating 5 MW. All of these installations had allowed a 70% energetic autonomy ratio on 'Seine Aval' site. Then, new treatment units were introduced. Thus, energy consumption has increased, with only 60 % of energy demands being covered. By 2020, a complete make-over of the 'Seine Aval' plant will be done. This should allow to cover about 70% of energy demands, partly thanks to biogas reuse. New plants are currently being constructed. All of them will include sludge digestion process providing biogas. With the 'Seine Gresillons' plant upgrading, digestion process will occur on site. Biogas will be used in a cogeneration system to produce both electricity (that would be either used on site or sold commercially, this has not been decided by now) and heat for digesters heating. The new 'Seine Moree' plant will be built in the city of Blanc-Mesnil. A partnership with the Syctom (an association in charge of treatment and reuse of the Great Paris household refuses) would permit co-digestion of organic waste from domestic refuses and sewage sludge on the same site. At last, in the 'Seine Amont' site, important works have been done to improve biogas system safety. Moreover, in this plant, with the improvement of wastewater treatment efficiency, digestion process is going to increase. (author)

  14. Normalizing urban inequality : Cinematic imaginaries of difference in postcolonial Amsterdam = Normalisation de l’inégalité urbaine: imaginaires cinématiques de la différence dans l’Amsterdam postcolonial = La normalización de la desigualdad urbana: imaginarios cinematográficos de diferencia en la Ámsterdam poscolonial

    NARCIS (Netherlands)

    van Gent, W.; Jaffe, R.

    2017-01-01

    Combining insights from critical urban studies with geographies of race and racism, this article examines the role of spatial imaginaries in normalizing urban inequalities, showing how such imaginaries make the associations between places and populations appear natural. We extend analyses of the

  15. L'alimentation de complément du jeune enfant après la dévaluation du franc CFA: deux études de cas en milieu urbain, au Congo et au Sénégal.

    OpenAIRE

    Delpeuch, F.; Martin-Prével, Y.; Fouéré, T.; Traissac, P.; Mbemba, F.; Ly, C.; Sy, A.; Trèche, S.; Maire, B.

    1996-01-01

    Developing countries frequently see their currency depreciated to varying degrees. The consequences of such monetary disturbances on the nutrition of young children are not well known, though children are the most vulnerable in nutritional terms. One year after the 50% devaluation of the CFA Franc (communauté financière africaine, "African Financial Community"), which took place on 12 January 1994 simultaneously in fourteen countries, nine of which are on the UNDP list of least developed coun...

  16. Comparative evaluation of energy-related aspects in urban and in rural districts - Case study in the Canton of Neuchatel, Switzerland; Analyse comparative des aspects energetiques de quartiers urbains et ruraux. Etude de cas dans le canton de Neuchatel. Rapport final

    Energy Technology Data Exchange (ETDEWEB)

    Perret, L.; Vuilleumier, R.; Bonhote, P. [Planair SA, La Sagne (Switzerland); Rey, E. [Bauart Architectes et Urbanistes SA, Neuchatel (Switzerland)

    2007-07-01

    The project aims at identifying the energy impact of various current ways of regional planning through a case study of eight districts in the canton of Neuchatel. The districts reveal the trends of planning in an urban centre, and in incorporated (suburb) or unincorporated territory. Thus, the influence of the distance to the centre of the agglomeration named 'centrality' has been studied. The energy expenditure for the buildings' construction phase (buildings, roads, networks) and utilization phase (heating, electricity, water, waste, networks) has been taken into account as well as the mobility. The energy investments have been evaluated by the method SNARC. The energy expenditure for operation and mobility has been evaluated based on questionnaires addressed to the inhabitants. As a result, the variable 'centrality' has only a weak role on the life cycle analysis (LCA) per inhabitant. In our case, the LCA for incorporated districts (suburb) and unincorporated districts are similar. With a LCA per square meter, the impact is completely similar and no correlation with the variable 'centrality' has been noticed. As the households are larger per inhabitants when the district is located in a suburban zone, the LCA per square meter remains stable. On the contrary, if the LCA is determined per household, the LCA is perfectly correlated with the variable 'centrality'. Thus, a household in the centre of Neuchatel consumes twice less energy resources than a household in Val-of-Ruz (rural area). The study highlights also the critical impacts of a LCA on a district scale. Finally, this study gives recommendations based on the energy and demographic prospects in order to respond to the objective of a 2000 watts society. (author)

  17. « Vous semez de la ciguë et prétendez voir mûrir des épis! » (Machiavel : polar et anthropologie urbaine à Chicago à l’âge de la prohibition

    Directory of Open Access Journals (Sweden)

    Benoît TADIÉ

    2010-03-01

    Full Text Available En partant de quelques œuvres-clé (en particulier The Gang, de Frederic Thrasher, 1927 ; Little Caesar de W. R. Burnett, 1929, cet article vise à mettre en lumière les affinités épistémologiques de l’Ecole de Chicago et du polar américain des années 1920. A travers l’étude comparée de ces deux corpus, il suggère que ces affinités ne relèvent pas d’une simple coïncidence mais d’une vision commune de la ville. Celle-ci se traduit notamment par une même approche de la criminalité, envisagée à la fois comme une construction narrative et comme phénomène historique, géographique et social.Starting from a few key works (in particular Frederic Thrasher’s The Gang, 1927, and W. R. Burnett’s Little Caesar, 1929, this article attempts to shed light on the epistemological affinities between the Chicago school of urban sociology and American urban crime fiction in the 1920s. Through a comparative study of these two corpuses, it suggests that these affinities result not from coincidence but from a common vision of the city. This, in particular, comes out in the similar treatment of urban crime, seen both as a narrative construction and as a historical, geographical and social phenomenon.

  18. Un développement urbain durable et socialement inclusif est-il possible dans le contexte de fragmentation socio-spatiale des métropoles des pays émergents? Réflexions à partir des cas de Recife (Brésil et de Chennai (Inde

    Directory of Open Access Journals (Sweden)

    Carrière Jean-Paul

    2016-12-01

    Full Text Available Dans un contexte globalisé, le développement de villes socialement durables et inclusives implique de nombreux défis contradictoires. L’analyse comparée des cas de Chennai, en Inde, et de Recife, au Brésil, montre qu’au-delà des spécificités de ces métropoles, nous retrouvons des processus de fragmentation socio-spatiale comparables et un réel décalage entre un discours sur l’insertion sociale et des pratiques urbanistiques orientées par la quête d’attractivité, qui se soldent par l’accentuation des inégalités. Ces contradictions renvoient à des conflits entre planification stratégique, jeu des forces des marchés immobilier et foncier, et attentes des populations. L’analyse de ces contradictions invite à repenser l’articulation de la dialectique local/global et à s’interroger sur l’effectivité du « droit à la ville » dans les sociétés de pays émergents. La comparaison développée dans cet article s’appuie sur des recherches menées à Recife dans un premier temps au début de la décennie en cours, puis plus récemment à Chennai.

  19. 3. national sittings on energy ''energy, urban mobility,... tomorrow: which responsibilities for the local governments?''; 3. assises nationales de l'energie. ''Energie, mobilite urbaine,... demain: quelles responsabilites pour les collectivites locales?''

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    This conference deals with the local government policy concerning the energy mastership of the transportation sector. Sixteen workshops discussed on the problem of the urban mobility in an environmental quality context: legal provisions affecting the energy mastership, mobility in the urban area, regulations, clean technologies enhancement, the public information impact on the energy consumption and the financial means. (A.L.B.)

  20. Contribution to the study of the behaviour, in the urban environment, during the runoff of rainwater, of the fission products emitted during a nuclear accident; Contribution a l`etude du devenir, en milieu urbain, pendant le ruissellement des eaux pluviales, des produits de fission emis en cas d`accident nucleaire

    Energy Technology Data Exchange (ETDEWEB)

    Pioch, M

    1993-05-24

    In the context of research into the environmental consequences of a serious accident occurring on a pressurized water reactor, this paper concerns the experimental study of behaviour of five fission products (caesium, strontium, iodine, ruthenium and tellurium) in the urban environment under the action of rainwater. Stable or radioactive multiple-element aerosols were produced. Their physicochemical characteristics and their solubility in rainwater were studied. Caesium and rubidium forms solutions totally and quickly, while strontium is partially soluble (approximately 50 %) and iodine is only slightly soluble. The behaviour of fission products on five urban surfaces was then studied. Batch experiments showed that the retention of dissolved forms of radioelements varied according to the material. The reactions involved are ion exchange reactions. The presence of certain ions in water (in particular NH{sub 4}{sup +}) increase the desorption of radioelements. Using a laboratory rainfall simulator, the re-entrainment of fission products by rainwater was examined. Two modes of deposition and two intensities of rainfall were simulated. The desorption of radioelements is greater after wet deposition and remobilization is reduced by an increase in intensity of rainfall. An addition of NH{sub 4}{sup +} in water is especially effective in the case of wet depositions. Suggestions are made in order to improve experimental protocols and continue the research. (author). 75 refs., 51 figs., 69 tabs., 14 appends.

  1. Public, road, urban and large areas lighting, illuminations and lifestyles. The right lighting. Mastery of needs, mastery of quality, mastery of light, mastery of energy; Eclairage public, routier, urbain, grand espaces, illuminations et cadre de vie. Eclairer juste. Maitrise des besoins, maitrise de la qualite, maitrise de la lumiere, maitrise de l'energie

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    The evolution of the economical and social life has led to an increase of the security, comfort and environment protection needs. Thus, the local authorities have to define the best lighting systems with the right light at the right place, at the right time at at the best cost. Despite the evolutions noticed during the last years, the lighting systems of urban areas is not always well adapted to the users' needs. Thanks to the products and equipments available today it is possible to light better and to consume less. This document summarizes the requirements for the mastery of lighting systems cost: mastery of needs, mastery of quality (lamps, lighting systems, electronic ballasts), mastery of light (time and quantity control), light management and maintenance; specifications for a road lighting project; specifications for an urban lighting project; lighting of parks and monuments; large areas, car parks and recreational facilities; power supply and management auxiliaries; advices and financial help from the French agency of environment and energy mastery, the European 'Greenlight' program. (J.S.)

  2. Devenir des micropolluants prioritaires et émergents dans les filières conventionnelles de traitement des eaux résiduaires urbaines des grosses collectivités (files eau et boues), et au cours du traitement tertiaire au charbon actif

    OpenAIRE

    Mailler , Romain

    2015-01-01

    This PhD was performed within the OPUR (Observatory of URban Pollution) research program, in collaboration with the Research and Development Department of the Parisian public sanitation service (SIAAP). This work deals with the removal of priority and emerging micropollutants by the conventional wastewater treatments, as well as tertiary treatment by activated carbon. A part of this work is also dedicated to the sludge contamination by priority and emerging substances and their fate during sl...

  3. Infiltration of runoff rainwater and transfer of the associated pollutants in the urban ground - towards a global and multi-disciplinary approach; Infiltration des eaux de ruissellement pluvial et transfert de polluants associes dans le sol urbain - vers une approche globale et pluridisciplinaire

    Energy Technology Data Exchange (ETDEWEB)

    Martinelli, I.

    1999-12-01

    Storm water run-off infiltration now appears as a supplementary or alternative strategy to gravitational drainage systems. The present study sought to draw up a framework to represent pollutant transfer in such infiltration, this phenomenon being governed by various physical, chemical and biological processes. Study of the literature was able on the one hand to specify urban storm water run-off pollution, and, on the other, to identify the various possible processes undergone or induced during infiltration in the soil. It was noted that experimentation in this area requires certain extra input, whether, at laboratory level, for studying interactions effects between several pollutants and several processes, or, in the field, for a better account of soil heterogeneity and of integration of various elementary phenomena. Nevertheless, the state of knowledge regarding these levels and various scientific areas made it possible to identify the main parameters seeming to govern pollutant transfer. A representation was drawn up of the soil underlying a storm water run-off infiltration system, and a experimental framework proposed both to validate and to enhance the present model. (author)

  4. A contribution to the thermal and aero-dynamical modelling of the urban micro-climate. Analysis of the water and vegetation impact on the comfort conditions in outdoor spaces; Contribution a la modelisation thermo-aeraulique du microclimat urbain. Caracterisation de l'impact de l'eau et de la vegetation sur les conditions de confort en espaces exterieurs

    Energy Technology Data Exchange (ETDEWEB)

    Vinet, J.

    2000-11-01

    In summer, temperatures in cities may rise, thereby inducing the so-called 'urban heat island' and tremendous consequences on outdoor comfort, health risks, pollutant emission and energy consumption. Replacing vegetation and moist surfaces by concrete or asphalt may enhance these problems. Therefore, the aim of this thesis is to quantify the impact of vegetation and water on urban micro-climate and comfort through numerical modelling; In the first part, a scientific literature review considers various topics applied to our problem such as urban micro-climate, simulations, urbanism, urban forestry and outdoor thermal comfort. This information is relevant to define and interpret further numerical modelling. Numerical simulations based on the coupling of the SOLENE. thermal program and the N3S CFD code are proposed to model wind flow, air and surface temperatures. The theoretical principles, hypothesis and coupling methodology are presented here. This set of numerical tools is combined in order to help urban or landscape planners, architects and engineers, to analyse the impacts of different projects on micro-climate and on outdoor thermal comfort, under hot summer conditions. To illustrate this approach, an open space in Montpellier (southern France) called the 'Place du Millenaire' and designed by Ricardo Bofill is studied, considering various cases (no vegetation, actual vegetation and vegetation in 30 years). The comparative results demonstrate improvements of urban form, micro-climate and outdoor thermal comfort. (author)

  5. Proceedings of MUTA 2006, the 4. international forum on urban mobility and advanced transportation : alternative energies for the automobile; Actes du colloque MUTA 2006, le 4. forum international sur la mobilite urbaine et les transports avances : alternatives energetiques dans l'automobile

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-15

    Clean modes of transport were highlighted at this forum with particular reference to the needs of transport operators in meeting urban mobility targets. The constraints facing the delivering of goods in urban centres were identified along with political and financial incentives that can promote research and innovation in the transportation sector. Other topical issues included mass transportation as a means to achieve clean and efficient mobility; the leadership role of governments in establishing policies for sustainable transportation; intelligent transportation systems and their many applications; and, transportation solutions presented by electric vehicles. The technological developments required to meet the needs of buses, tramways and trucks were also identified along with some of the technical and societal barriers to the development of special urban vehicles, such as small delivery vehicles for local transport. New collaborative projects aimed at improving buses and delivery vehicles were highlighted with reference to future prospects for individualized urban mobility. Regulations and incentives that would contribute to fewer cars in urban environments were discussed in terms of the challenge created by the public's resistance to change. Methods to overcome bad habits and to optimize modal transport were recommended. Funding tools for transport innovation in France, Europe and elsewhere were highlighted along with case studies of research and development projects in urban transport. New developments and applications in batteries and hybrid technology for automotive propulsion systems were reviewed. refs., tabs., figs.

  6. City Logistics in Italy and in Romania - Compare to understand

    OpenAIRE

    Bracchi , Enrica; DURAND , Bruno; Senkel , Marie-Pascale; Fratila , Camelia

    2015-01-01

    International audience; En l'espace de quelques années, la logistique urbaine s'est imposée comme terrain d'expérimentations. Incontestablement, c'est la pression environnementale qui a fait du TMV (Transport des Marchandises en Ville) un sujet de première importance. Les villes ne pouvant plus, en effet, continuer à absorber la croissance de leurs déplacements, les livraisons des commerces comme celles des internautes, la nécessité de mettre en place des politiques de distribution urbaine ad...

  7. Comportements spatio-temporels des touristes dans la région de Québec

    OpenAIRE

    Kercuku, Hava

    2009-01-01

    La pratique du tourisme urbain est un facteur important pour le développement économique et spatial de nombreuses villes et régions dans le monde. Cependant de nouvelles destinations et de nouvelles pratiques émergent constamment. D’une part, l’offre touristique urbaine se modifie et se diversifie constamment, et d’autre part, les pratiques touristiques se renouvellent, s’entrecroisent et se ressemblent en cherchant toujours plus, plus vite et plus personnalisé. La région touristique de Québe...

  8. Les déplacements domicile-travail structurent-ils encore les territoires ?

    Directory of Open Access Journals (Sweden)

    Jean-Marc Zaninetti

    2017-12-01

    Full Text Available Introduite en France dans le recensement de 1968, la mesure des déplacements domicile-travail s’est imposée comme le critère exclusif de définition de structuration des territoires par les aires urbaines. Toutefois, le processus de para-urbanisation généralisée du territoire constaté en région Centre – Val de Loire entre 1990 et 2011 remet en cause la pertinence du recensement pour la mesure des mobilités professionnelles habituelles et la structuration urbaine du territoire.

  9. Élaboration et distribution d'un nouveau vaccin contre la babésiose ...

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

    13 mars 2018 ... La criminalité et la pauvreté au Ghana urbain. La manière dont la criminalité et la pauvreté interagissent a été étudiée et débattue dans la littérature de recherche occidentale, mais on sait pe. Voir davantageLa criminalité et la pauvreté au Ghana urbain · Ce que nous faisons · Financement · Ressources ...

  10. Un think tank ouest-africain accroît son rayonnement et renforce ses ...

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

    28 avr. 2016 ... La criminalité et la pauvreté au Ghana urbain. La manière dont la criminalité et la pauvreté interagissent a été étudiée et débattue dans la littérature de recherche occidentale, mais on sait pe. Voir davantageLa criminalité et la pauvreté au Ghana urbain · Ce que nous faisons · Financement · Ressources ...

  11. Un institut nigérien accorde la priorité à la gestion financière | CRDI ...

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

    28 avr. 2016 ... La criminalité et la pauvreté au Ghana urbain. La manière dont la criminalité et la pauvreté interagissent a été étudiée et débattue dans la littérature de recherche occidentale, mais on sait pe. Voir davantageLa criminalité et la pauvreté au Ghana urbain · Ce que nous faisons · Financement · Ressources ...

  12. Vers une tarification plate dans le Rhône. Enjeux, limites et perspectives de la restructuration tarifaire sur les lignes régulières départementales

    OpenAIRE

    Peggy Durand

    2007-01-01

    Les questions de mobilité au sein des grands bassins de vie et entre les aires urbaines occupent aujourd'hui une place majeure dans les réflexions politiques, notamment à l'échelle départementale. La loi d'Orientation sur les Transports Intérieurs (LOTI) de 1982 a confirmé la compétence des Départements dans la planification et l'organisation des transports collectifs non-urbains de personnes (Art 29). Autorités organisatrices, ils ont aujourd'hui la charge de définir l'offre et les dispositi...

  13. Collaboration dans les établissements humains spontanés : s ...

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

    5 mars 2018 ... Frères et sœurs pagayant à l'école ... Il s'agit généralement d'un aspect négligé de la planification urbaine et, dans la plupart des cas, l'accès aux services urbains de base tels que la collecte et la ... Être à l'écoute des intervenants locaux devient de plus en plus important dans le processus d'urbanisme.

  14. Diversité et dynamique des Salmonella Lactuca sativa L.) dans les ...

    African Journals Online (AJOL)

    Objectif: Au Niger, l'agriculture maraîchère réalisée dans les zones urbaines et péri-urbaines utilise les eaux usées souvent très souillées par la matière fécale humaine et animale pour l'irrigation. Cette étude a évalué la prévalence et la diversité des Salmonella isolées de la laitue dans différents sites maraichers du Niger.

  15. Ville et santé publique au Japon

    Directory of Open Access Journals (Sweden)

    Takano Takehito

    1996-04-01

    Full Text Available Mon intervention porte sur le niveau de santé en secteur urbain et les questions à l'ordre du jour dans le domaine de la santé publique au Japon. La première partie concerne la cartographie des indices de santé en secteur urbain. Une telle cartographie requiert l'utilisation de techniques de traitement de l'image. On peut l'effectuer soit à l'aide du “ système d'information géographique ” (Geographic Information System, GIS, soit par une “image-diagnostic” (Image Diagnosis des différentes ...

  16. Afnor NF D 35-330. Gas-fired central heating boilers. Type B{sub 11} and B{sub 11BIS} boilers fitted with atmospheric burners of nominal heat input not exceeding 70 kW. (European standard EN 297); Afnor NF D 35-330. Chaudieres de chauffage central utilisant les combustibles gazeux. Chaudieres des types B{sub 11} et B{sub 11BIS} equipees de bruleurs atmospheriques dont le debit calorifique nominal est inferieur ou egal a 70 kW. (Norme europeenne EN 297)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-10-01

    This standard document defines the specifications and testing techniques relative to the manufacturing, safety, energy rational use, functioning capacity, classification and labeling of gas-fueled heating plants. It replaces the previous NF D 35-331 norm from November 1989 which comprised the NF D 35-331 norm from January 1980, its additives 1 (January 1980) and 2 (June 1984), its modifications 1 (July 1980), 2 (September 1986), 3 (December 1988) and 4 (November 1989) and the D 30-005 experimental norm of November 1991. (J.S.)

  17. No.3605 report realized by the name of the Foreign Affairs Commission on the law project (no. 3156), authorizing the approbation of the protocol to the 1979 convention on the long distance transfrontier atmospheric pollution relative to the reduction of the acidification, the eutrophication and the tropospheric ozone (nine annexes); No. 3605 rapport fait au nom de la Commission des Affaires Etrangeres sur le projet de Loi (no. 3156), autorisant l'approbation du protocole a la convention de 1979 sur la pollution atmospherique transfrontiere a longue distance relatif a la reduction de l'acidification, de l'eutrophisation et de l'ozone tropospherique (ensemble neuf annexes)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-01-15

    In the framework of the 1979 convention (of Geneva), eight specific protocols have been adopted, amongch the Goteborg protocol on the long distance transfrontier atmospheric pollution. It aims to reduce of 40% to 2010, the emissions of three pollutants (sulfur dioxide, nitrogen oxides and volatile organic compounds). In this context this report presents the reinforcement of the international tools of fight against the atmospheric pollution and the Goteborg protocol in the existing devices of the air pollution abatement. (A.L.B.)

  18. Energie-Cite opinion on: Communication from the commission to the council, the European parliament, the European economic and social committee and the committee of the regions; Avis d'Energie-Cite sur la: communication de la commission au conseil, au parlement Europeen, au comite economique et social Europeen et au comite des regions. Vers une strategie thematique pour l'environnement urbain

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-02-01

    The failure to give sufficient consideration to the environmental implications of decisions and a failure to plan systematically for a high quality urban environment are among the principal causes of the current situation, with consequences both for the environment and for the city economy and its citizens. Planning for a high level of environmental protection is one of the key elements to achieving the sustainable development of cities and to providing a high quality of life for Europe urban citizens. The following overview presents the outcome of extensive consultations. The aim is to contribute at the EU level to the development of a strong framework which will bring about local initiatives based on best practice, leaving the choice of solutions and targets to the local decision makers. This Communication and the actions it proposes will be subject to a second round of consultations in 2004, including discussions with the EU institutions, the EU Expert Group on the Urban Environment and different stakeholder groups, as well as an open Internet consultation. In addition, technical working groups composed of experts and stakeholders will be organised to examine in further detail the key actions proposed, their feasibility and how they would contribute to improving the urban environment. (A.L.B.)

  19. Free cooling in an urban environment - A lake and ground water distribution network to cover the heating and cooling needs of buildings - Feasibility study for the City of Neuchatel, Switzerland; Freecooling en milieu urbain. Reseau de distribution d'eau de lac et d'eau souterraine pour couvrir les besoins en rafraichissement et en chaleur des batiments. Etude de faisabilite pour la Ville de Neuchatel, Suisse - Rapport final

    Energy Technology Data Exchange (ETDEWEB)

    Matthey, B.; Affolter, M.

    2009-12-15

    The potential cooling demand in the City of Neuchatel (35,000 inhabitants) is estimated to at least 15 MW. Considering the natural cooling resources available (the Lake of Neuchatel, the Serriere spring, groundwater), these needs can be satisfied without electrical refrigeration equipment. However, the multiplicity of resources and needs implicates the use of multiple and complementary water supply systems: individual wells, multiple building network, lake water distribution network for an entire district. Three exploitation systems to supply cooling water to the center of Neuchatel have been evaluated: lake water, ground water, existing drinking water network. The analysis indicates that the realization of a lake water network for free cooling and heat pumps is economically attractive. In a first step and to meet the short-term demand, the providing of cool water through the existing drinking water network can be considered. In Serriere, the use of the heating and cooling resource of the Serriere river has been evaluated. The results demonstrate the technical and economical feasibility of a heating and cooling water supply network. (authors)

  20. 262-IJBCS-Article-Dr Mahamadou Sawadogo

    African Journals Online (AJOL)

    Dr Gatsing

    producteurs pour la culture du gombo destinée à la population urbaine. La présente ... permis de comprendre que la filière de production et de commercialisation du gombo frais procure des revenus ...... ecosystem components on cultural.

  1. La protection de l'accès à l'eau contre les effets de l'étalement ...

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

    26 mai 2011 ... La protection de l'accès à l'eau contre les effets de l'étalement urbain et ... La distribution durable et équitable de l'eau aux populations vivant aux .... de l'Inde ne cesse de croître et, par le fait même, de transformer le pays.

  2. Contamination métallique de l'eau et du sédiment d'Oued Bouhamra ...

    African Journals Online (AJOL)

    d'identifier les origines industrielle, agricole et domestique de cette pollution. Mots-clés : éléments traces métalliques- rejets urbains en mer – eau superficielle – sédiment - Golfe d'Annaba. Abstract ...... thermique des déchets). Ed. TEC & DOC ...

  3. Evaluation et cartographie de la vulnérabilité à la pollution des eaux ...

    African Journals Online (AJOL)

    La ville de Guelma a connue un développement industriel, agricole et urbain ...... Thèse de Doctorat en hydrogéologie . ... DRASTIC et SYNTACS:Cas de la ville de M'bahiakro, Centre de la Côte d'Ivoire, International Journal of Innovation and.

  4. Mexico : tous les projets | Page 5 | CRDI - Centre de recherches ...

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

    Sujet: PEACE RESEARCH, CONFLICT RESOLUTION, DEMOCRATIZATION, ECONOMIC RECONSTRUCTION, Economic and social development. Région: ... Les déplacements quotidiens de millions de personnes vers leur lieu de travail constituent une importante source de pollution en milieu urbain. Date de début : 1 ...

  5. Conflit et développement dans les collines de Guwahati | CRDI ...

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

    17 nov. 2016 ... ... sur l'efficacité des interventions de l'État pour atténuer la violence. ... inégalités et violence en milieu urbain en Inde : vers un urbanisme plus inclusif. ... Comprendre les liens entre le genre, la vulnérabilité et la violence ...

  6. Conception de rues sûres et inclusives en Inde | CRDI - Centre de ...

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

    17 nov. 2016 ... ... alors que les cas de violence à l'égard des femmes sont en partie liés ... inégalités et violence en milieu urbain en Inde : vers un urbanisme plus inclusif. ... Comprendre les liens entre le genre, la vulnérabilité et la violence ...

  7. : tous les projets | Page 402 | CRDI - Centre de recherches pour le ...

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

    Les déplacements quotidiens de millions de personnes vers leur lieu de travail constituent une importante source de pollution en milieu urbain. Date de début : 1 mars 2010. End Date: 1 septembre 2012. Sujet: WORKING CONDITIONS, ENERGY CONSUMPTION, INFORMATION TECHNOLOGY. Région: Argentina, South ...

  8. Publications | Page 36 | CRDI - Centre de recherches pour le ...

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

    Avec nos livres, nos articles, nos publications de recherche et nos études, nous visons à ... de développement (BAD) a eu lieu du 2 au 5 décembre 2015 en Azerbaïdjan. ... Les lieux d'accès public, notamment les cafés Internet urbains et les ...

  9. Sécurité hydrique dans les régions périurbaines de l'Asie du Sud ...

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

    HABITAT), 60 % de la population mondiale vivra en région urbaine d'ici 2025. On s'attend à ce que les régions périurbaines connaissent également une croissance considérable. Zones de transition où la démarcation entre région rurale et ...

  10. South of Sahara | Page 46 | IDRC - International Development ...

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

    South of Sahara. Sud du Sahara. Read more about Open Architecture, Standards and Information Systems (OASIS) for Healthcare in Africa. Language English. Read more about Gestion intégrée de l'eau, de l'assainissement et des déchets solides dans de petits centres urbains autour du lac Victoria (Kenya). Language ...

  11. ÉTUDE DE CAS — Quito, Équateur : Les fermes de Quito, sources d ...

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

    agriculture urbaine d'abord mis de l'avant par la municipalité de Quito pour ... mais en mai 2002, AGRUPAR était créée au sein de la Dirección de Desarrollo Humano Sustentable (Division du développement humain durable).

  12. Le temps des cités-jardins | CRDI - Centre de recherches pour le ...

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

    gardiste conduite par le CRDI , plusieurs villes du Sud en sont venues à remettre en question l'attitude de leur administration à l'égard de l'agriculture urbaine. Ravitaillement des villes. Site de l'Organisation des Nations Unies ...

  13. Résultats de recherche | Page 415 | CRDI - Centre de recherches ...

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

    un_focus - Cultiver de meilleures villes : Agriculture urbaine et développement durable. Les Nations Unies estiment qu'au cours des 25 prochaines années, la quasi-totalité de la croissance démographique se produira dans les villes des pays en développement. Publication Date. 1 janvier 2006. Livres.

  14. 2442-IJBCS-Article-Rodrigue Ebonji Seth

    African Journals Online (AJOL)

    hp

    The mangrove is a forest formation characteristic of muddy tropical coastlines, mostly constituted of mangroves. ... stakes and pollution risks connected to the transport of persons and goods. A random sample ..... within the lower Sanaga Basin, ... Développement Urbain (PDU), drainage ... Edea Atlantic coast of Cameroon,.

  15. Browse Title Index

    African Journals Online (AJOL)

    Vol 115 (2016), L'agglomeration oranaise jeux d'acteurs et dynamique urbaine, Abstract. Mohamed Madani. Vol 94 (2010), L'agrobusiness en Méditerranée: tendances actuelles et perspectives, Abstract. Foued Cheriet, Selma Tozanli. Vol 100 (2012), L'algerie, du transfert de technologie a l'economie du savoir et de ...

  16. Bulletin #115 | CRDI - Centre de recherches pour le dévelopement ...

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

    'Afrique ont participé au quatrième Symposium mondial sur la recherche sur les ... constitue l'un des facteurs du façonnement des attitudes des hommes et de la manière dont les jeunes hommes urbains comprennent les rôles masculins.

  17. 1325-IJBCS-Article-Warda Karima

    African Journals Online (AJOL)

    USER

    enfants d'origine urbaine et chez 58,9% d'enfants ayant reçus un allaitement de moins de deux mois (Bouskraoui et al., 2011). Différents facteurs jouent ainsi un rôle important comme facteurs favorisant le portage des souches de S. pneumoniae.

  18. African Journal of Reproductive Health - Vol 5, No 2 (2001)

    African Journals Online (AJOL)

    Planning Familial chez les Adolescentes Mères d'Enfants dans un Centre Urbain du Cameroun · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. Touko Adonis, Kemmegne Joseph, Nissack Françoise, Schmidt-Ehry Bergis, Kamta Charles, 105-115 ...

  19. African Sociological Review / Revue Africaine de Sociologie - Vol 14 ...

    African Journals Online (AJOL)

    Stratégie de survie et culture de jeunes dans les marchés urbains de Dakar : cas des adolescentes travailleuses (Sénégal). EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. RA Diop, 67-83. http://dx.doi.org/10.4314/asr.v14i1.70229 ...

  20. De los PDU,s a los PMU,s pasando por los LTP,s: el trabalenguas de la ciudad sostenible

    OpenAIRE

    López Lambas, María Eugenia

    2008-01-01

    Mucho se ha escrito acerca de la necesidad de implementar planes de movilidad urbana sostenible. En efecto, de los Plans de déplacements urbains (planes de Desplazamiento Urbanos-PDU) iniciados en Francia en el año 1982, y los Local Transport Plans (Pl