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Sample records for aux radiations ionisantes

  1. Response of hematopoietic stem cells to ionizing radiation; Reponse des cellules souches hematopoitiques aux radiations ionisantes

    Energy Technology Data Exchange (ETDEWEB)

    Simonnet, A

    2008-12-15

    Hematopoietic stem cells (HSCs) maintain blood and immune system throughout life and restore them after hematological injuries. Exposure of an organism to ionizing radiation (IR) causes rapid and acute myelosuppression and challenges the replenishment capacity of HSCs. Yet, the precise damages that are generated remain largely unexplored. To better understand these effects, phenotypic and functional changes in the stem/progenitor compartments of sublethally irradiated mice were monitored over a ten week period after radiation exposure. We report that shortly after sublethal IR-exposure, HSCs, defined by their repopulating ability, still segregate in the Hoechst dye excluding side population (SP); yet, their Sca-1 (S) and c-Kit (K) expression levels are increased and severely reduced, respectively, with a concurrent increase in the proportion of SP{sup SK} cells positive for established indicators of HSC presence: CD150{sup +} and CD105{sup +}. A great proportion of HSCs quickly but transiently enter the cell cycle to replenish the bone marrow of myelo-ablated mice. Ten weeks after, whereas bone marrow cellularity has recovered and hematopoietic homeostasis is restored, major phenotypic modifications can be observed within the Lin{sup -/low} Sca-1{sup +} c-Kit{sup +} (LSK) stem/progenitor compartment: CD150{sup +}/Flk2{sup -} and CD150{sup -}/Flk2{sup +} LSK cell frequencies are increased and dramatically reduced, respectively. CD150{sup +} LSK cells also show impaired reconstitution capacity, accrued number of {gamma}-H2AX foci and increased tendency to apoptosis. This demonstrates that the LSK compartment is not properly restored 10 weeks after sublethal exposure, and that long-term IR-induced injury to the bone marrow proceeds, at least partially, through direct damage to the stem cell pool. Thrombopoietin (TPO) has been shown to promote the survival of lethally irradiated mice when administrated quickly after exposure. We investigated the mechanisms underlying

  2. Supervision of professional personnel exposed to ionizing radiation (X-rays); Surveillance du personnel professionnellement expose aux radiations ionisantes (rayons X)

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    Chalabreysse, J. [Commissariat a l' Energie Atomique, Pierrelatte (France). Centre d' Etudes Nucleaires

    1964-10-01

    After a short introduction giving the physical characteristics and the possible interactions of X-rays, this report considers in more detail the basis of the dosimetry and the units used. Taking into account the dangers of irradiation and the professional norms applicable, the report reviews the physical methods (collective and individual dosimetry) and the biological method (based on the systematic supervision of the hemogram) which are used to ensure that these professional norms an respected. As an example the influence is studied of repeated doses of X-rays on the hemogram of X-ray operators when the individual radiation levels are known through dosimetric films. Two processes are used: one considers the mean values (irradiation and average hemogram for each person), the other requires the use of an electronic computer and uses each haematological variable as a function of the monthly or cumulative doses; it gives correlation coefficients for the different variables. In conclusion, the results obtained are compared to those conventionally accepted, and the validity of the hemogram is estimated as a criterion for the supervision. (author) [French] Apres avoir rappele brievement les caracteristiques physiques et le mode d'interaction des rayons X, ce rapport reprend les bases de la dosimetrie et les unites qui sont utilisees. Considerant les dangers entraines par une irradiation et rappelant les normes professionnelles, il envisage les methodes physiques (dosimetrie collective et individuelle) et la methode biologique (basee sur la surveillance systematique de l'hemogramme), utilisees pour faire respecter ces normes professionnelles. En application est etudiee l'influence, sur l'hemogramme des manipulateurs radio, des rayons X subis a doses repetees, connaissant les niveaux individuels d'irradiation gr e au film dosimetrique. Deux procedes sont utilises, l'un considere les valeurs moyennes (irradiation et hemogramme moyens pour

  3. Approach of combined cancer gene therapy and radiation: response of promoters to ionizing radiation; Approche de therapie genique anti-cancereuse combinee a l'irradiation: etude de la reponse de promoteurs aux radiations ionisantes

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    Anstett, A

    2005-09-15

    Gene therapy is an emerging cancer treatment modality. We are interested in developing a radiation-inducible gene therapy system to sensitize the tumor vasculature to the effects of ionizing radiation (IR) treatment. An expression system based on irradiation-inducible promoters will drive the expression of anti-tumor genes in the tumor vasculature. Solid tumors are dependent on angio genesis, a process in which new blood vessels are formed from the pre-existing vasculature. Vascular endothelial cells are un transformed and genetically stable, thus avoiding the problem of resistance to the treatments. Vascular endothelial cells may therefore represent a suitable target for this therapeutic gene therapy strategy.The identification of IR-inducible promoters native to endothelial cells was performed by gene expression profiling using cDNA micro array technology. We describe the genes modified by clinically relevant doses of IR. The extension to high doses aimed at studying the effects of total radiation delivery to the tumor. The radio-inductiveness of the genes selected for promoter study was confirmed by RT-PCR. Analysis of the activity of promoters in response to IR was also assessed in a reporter plasmid. We found that authentic promoters cloned onto a plasmid are not suitable for cancer gene therapy due to their low induction after IR. In contrast, synthetic promoters containing repeated sequence-specific binding sites for IR-activated transcription factors such as NF-{kappa}B are potential candidates for gene therapy. The activity of five tandemly repeated TGGGGACTTTCCGC elements for NF-{kappa}B binding in a luciferase reporter was increased in a dose-dependent manner. Interestingly, the response to fractionated low doses was improved in comparison to the total single dose. Thus, we put present evidence that a synthetic promoter for NF-{kappa}B specific binding may have application in the radio-therapeutic treatment of cancer. (author)

  4. Ionizing radiations and oxidizing stress; Radiations ionisantes et stress oxydatif

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    Avry Yakoubi, R

    1998-07-01

    The normal cell metabolism produces continuously reactive oxygenated species which sometimes are not completely transformed and can lead to a highly reactive form of oxygen: the superoxide anion (characteristic of free radicals). These aggressive molecules are normally eliminated by the enzymatic and biochemical defense systems, but some external factors, like the ionizing radiations, can accelerate their production and saturate the natural defense systems. Such a situation leads to a disorganization of the membrane structures, to the oxidation of the lipo-proteins and proteins and to a degradation and fragmentation of DNA. This oxidative stress affects all kind of tissues and metabolisms and thus participates to a large number of pathologies, in particular cancers. (J.S.)

  5. P53 activation, a key event of the cellular response to gamma irradiation; L'activation de la proteine p53, un evenement determinant de la reponse cellulaire aux radiations ionisantes

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    Drane, P.; Alvarez, S.; Meiller, A.; May, E. [CEA Fontenay-aux-Roses, Dept. de Radiobiologie et de Radiopathologie, Lab. de Cancerogenese Moleculaire, CNRS, UMR 217, 92 (France)

    2002-03-01

    The tumor suppressor gene p53 encodes a protein whose major function is to protect organisms from proliferation of potentially tumorigenic cells. In normal conditions (unstressed cells), the p53 protein is inert and maintained at low level through its association with the Mdm2 oncogene, causing its translocation from the nucleus into the cytoplasm and its degradation through ubiquitin/proteasome pathway. In response to damaged DNA or to a variety of stresses, p53 accumulates in the nucleus and is activated as a transcriptional trans-activator. Posttranslational modifications of p53 including multi-site phosphorylation and acetylation are the major mechanism of p53 regulation. After exposure to ionising radiation, p53 activation implicates ATM, ATR, Chk2 and Chk1 kinases that phosphorylate the N-terminal domain on Ser15 (ATM and/or ATR), and Ser20 (Chk2 and/or Chk1), causing the dissociation of the p53/Mdm2 complex and thereby the stabilisation of p53. The process initiated by {gamma}-irradiation exposure involves also increased interaction of the p53 N-terminal domain with CBP/p300 and P/CAF leading to acetylation of the distant C-terminal domain at Lys 320, 373 and 382. In addition, the ATM-mediated dephosphorylation of Ser376 creates a fixation site for 14-3-3 protein. Taken together, phosphorylation, acetylation and association with co factors induce the stimulation of p53 transcriptional activity resulting in the expression of a set of genes involved, notably, in cell cycle arrest and apoptosis. This stress-induced p53 pathways lead to one of two outcomes: growth arrest or apoptosis and consequently protects the organism from the genotoxic effects of ionising radiation. (author)

  6. Late effects of ionizing radiation on testis; Effets tardifs des radiations ionisantes sur le testicules

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    Bardet, E. [Centre Regional de Lutte Contre le Cancer Rene-Gauducheau, 44 - Nantes (France)

    1997-12-01

    Most of the basic data regarding the effect of radiation on the testis are issued from animal studies. They demonstrate the extreme radiosensitivity on the germ cell lineage but little is known about the reversible or definitive aspects of these radiation induced effects. In man, the late non stochastic effects of radiation to the testicle are mainly related to persisting spermatogenesis disturbances or/and hormone related problems. Morphological, physiological, radiobiological specificities of the human testis along with numerous parameters depending on radiation conditions make it difficult to evaluate the late effects and radiation tolerance doses. Evaluation of such effects based on a common scale for therapeutic radiation schedules would improve the present understanding and possibility prevent the occurrence of these delayed effects, for the benefit of patients. (author)

  7. Ionizing radiations management in university, medical and industrial media; La gestion des sources ionisantes en milieux universitaire, medical et industriel

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    Klein, D. [Universite Technologique de Belfort Montbeliard - LERMPS, 90 - Belfort (France)]|[Universite de Franche Comte, CREST-IRMA, 25 - Montbeliard (France)

    2001-07-01

    The radioactive sources are useful in several areas: medicine, research, measurement laboratories. Severe accidents in the past (Forbach in France 1991, Arequipa, Peru 1999, Goiania, Brazil 1987) remind us of the dangerous character of ionizing radiations. That is why the the management of radioactive sources are so regulated. Radiation protection and legal aspects of sealed and unsealed sources management are evoked, as well as the different official organisms that take a part in their management. (N.C.)

  8. Cell cycle break and apoptosis induction for the HPV-18 positive human head and neck carcinomas lines, after exposure to 5-fluorouracils and ionizing radiations:NF-kB implication in the radiosensitivity and spontaneous apoptosis; Arrets du cycle cellulaire et induction d'apoptose pour les lignees de carcinome humain de la tete et du cou HPV-18 positives, apres exposition au 5-fluorouracile et aux radiations ionisantes: implication de NF-kB dans la radiosensibilite et l'apoptose spontanee

    Energy Technology Data Exchange (ETDEWEB)

    Didelot, C

    2002-04-15

    The P-53 protein holds an important contribution in the control of the cell cycle as well as the apoptosis control. But in numerous cancers the P-53 protein functionality is blocked by mutations or by its gene obliteration. The distribution of cells in the cell cycle as well as the apoptosis induction have been studied after exposure to 5-Fluorouracils (5-F.U.) or ionizing radiations. The two types of stress can induce dependent P-53 apoptosis after 5-F.U. exposure and independent P-53 apoptosis after ionizing radiation exposure. The P-53 protein is not the only one to have an important part in the cell cycle and apoptosis control, the transcription factor is important as well as the cells sensitivity to a stress such ionizing radiation. This could open new approaches of increasing the biological effects of ionizing radiations. (N.C.)

  9. Effects of ionizing radiations on reticulated polymers associated to nuclear wastes. The HSF-SIMS technique contribution; Effets des radiations ionisantes sur les polymeres reticules associes aux dechets nucleaires. Apport de la technique HSF-SIMS

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    Debre, O. [Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire

    1997-06-30

    Among the materials used for confinement of nuclear wastes of low and medium level activity the epoxyde resins are known as matrices which preserve well their properties in an ionizing environment. This work is dedicated to the investigation of the modifications occurring in molecular structure of these materials as well as of the ion exchange resins they incorporate, irradiated in different conditions. The first part deals with the analysis of a commercial reticulated epoxyde resin submitted to a 2 MGy integral dose gamma irradiation under two different dose rate (51 and 900 Gy/h), and under two different environments (air and water). The results obtained with the techniques providing structure information (time-of-flight mass spectrometry (HSF-SIMS) and FT-IR spectrometry) confirm those obtained by techniques sensible to macroscopic properties of material (DMA, DSC), taking into account that no noticeable irradiation effect can be made evident inside the material. On the other hand, an irradiation carried out in air results in a superficial oxidation, due probably to the action of the air radiolysis products. The preliminary results of an ion irradiation followed by an in-situ HSF-SIMS analysis pointed out to a basic difference between the energy amount transferred by gamma photons and fast ions; the last ones being able to induce scissions of the nearby liaisons in the material. The second part of this work is concerned with the ion exchange resins of the type PS-DVB saturated in water and non-active ions, simulating real wastes, irradiated in the same conditions as the epoxyde resins. In contrast to the results on the last one, it appears that the irradiation of these materials results primarily in scissions of the functional groups on which the ions are attached. In addition to this finding it appears that the role of water as carrying outward the attached ions appears to be fundamental 175 refs.

  10. Characterization of ionizing radiation effects in MOS structures by study of bipolar operation; Caracterisation des effets induits par irradiations ionisantes dans des structures MOS a partir de leur fonctionnement en regime bipolaire

    Energy Technology Data Exchange (ETDEWEB)

    Bakhtiar, H. [Univ. Teknologi Malaysia, Dept. of Physics, Johor (Malaysia); Picard, C.; Brisset, C. [CEA Saclay, Lab. d' Electronique et de Technologie de l' Informatique, LETI, 91 - Gif-sur-Yvette (France); Bakhtiar, H.; Hoffmann, A.; Charles, J.P. [Metz Univ., LICM-CLOES-Supelec, 57 (France)

    1999-07-01

    This work presents an original method to characterize radiation effects of micronic transistors. The characterization includes a study of the transistor substrate-drain junction and current gain variation of the bipolar transistor (drain-substrate-source as emitter-base-collector) for different gate voltages. (author000.

  11. Radio-oxidation of an EPDM elastomer under weak or strong ionising radiations: measurement and modelling of dioxygen consumption; Radio-oxydation d'un elastomere de type EPDM lors d'irradiations faiblement ou fortement ionisantes: mesure et modelisation de la consommation de dioxygene

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    Dely, N

    2005-10-15

    Usually, the irradiation of polymers under ionising radiations occurs in air that is in the presence of oxygen. This leads to a radio oxidation process and to oxygen consumption. Our material is an EPDM elastomer (ethylene propylene 1,4 hexadiene) used as insulator in control-command cables in nuclear plants (Pressurised Water Reactor). A specific device has been conceived and built up during this PhD work for measuring very small oxygen consumptions with an accuracy of around 10%. Ionising radiations used are electrons at 1 MeV and carbon ions at 11 MeV per nucleon. Under both electron and ion irradiations, the influence of oxygen pressure on oxygen consumption has been studied in a very large range: between 1 and 200 mbar. In both cases, the yield of oxygen consumption is constant in-between 200 and 5 mbar. Then, at lower pressures, it decreases appreciably. On the other hand, the oxygen consumption during ion irradiation is four times smaller than during electron irradiation. This emphasizes the role of the heterogeneity of the energy deposition at a nano-metric scale. The adjustment of the experimental results obtained during electron irradiation with the general homogeneous steady-state kinetic model has allowed extracting all the values of the kinetic parameters for the chosen mechanism of radio oxidation. The knowledge of these numbers will allow us to face our results obtained during ion irradiation with a heterogeneous kinetic model under development. (author)

  12. A radiation tolerant 32-bit digital signal processor (DSP); Un processeur de traitement du signal 32 bits (DSP) tolerant aux radiations

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    Ramaswamy, S.; Alcom, C.; Haddad, N.; Lawson, D.; Page, T.; Scandalis, G.; Scott, T. [Lockheed Martin Federal Systems, Manassas, VA (United States); Robinson, P.; Bain, D. [Innovative Systems and Technologies Corp., Tampa, FL (United States)

    1999-07-01

    This paper describes the development of a radiation tolerant version of the Analog Devices Incorporated (ADI) ADSP-21020 (RH21020), a programmable 32/40-bit floating point DSP. Implementation of layout transfer and successful fabrication of RH21020 in a Qualified Manufacturers List (QML) radiation hardened process are discussed. Results of electrical and radiation characterization of the RH21020 are reported in this paper. (authors)

  13. Effects of ionizing radiations on DNA-protein complexes; Effets des radiations ionisantes sur des complexes ADN-proteine

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    Gillard, N

    2005-11-15

    The radio-induced destruction of DNA-protein complexes may have serious consequences for systems implicated in important cellular functions. The first system which has been studied is the lactose operon system, that regulates gene expression in Escherichia coli. First of all, the repressor-operator complex is destroyed after irradiation of the complex or of the protein alone. The damaging of the domain of repressor binding to DNA (headpiece) has been demonstrated and studied from the point of view of peptide chain integrity, conformation and amino acids damages. Secondly, dysfunctions of the in vitro induction of an irradiated repressor-unirradiated DNA complex have been observed. These perturbations, due to a decrease of the number of inducer binding sites, are correlated to the damaging of tryptophan residues. Moreover, the inducer protects the repressor when they are irradiated together, both by acting as a scavenger in the bulk, and by the masking of its binding site on the protein. The second studied system is formed by Fpg (for Formamido pyrimidine glycosylase), a DNA repair protein and a DNA with an oxidative lesion. The results show that irradiation disturbs the repair both by decreasing its efficiency of DNA lesion recognition and binding, and by altering its enzymatic activity. (author)

  14. Use of commercial VDMOSFETS in an electronic system subjected to radiation; Utilisation des VDMOSFETs commerciaux dans un systeme electronique soumis aux radiations

    Energy Technology Data Exchange (ETDEWEB)

    Picard, C.; Brisset, C.; Quittard, O.; Marceau, M.; Joffre, F. [CEA Saclay, Lab. d' Electronique et de Technologie de l' Informatique, LETI, 91 - Gif-sur-Yvette (France); Hoffmann, A.; Charles, J.P. [centre Lorrain d' Optique et Electronique des Solides, Supelec, 57 - Metz (France)

    1999-07-01

    This study explores the usefulness of pre-irradiation as a hardening technique for NMOS transistors. NMOS transistors have been exposed to Co-60 gamma radiation with a dose-rate of 10 krad(SiO{sub 2})/h. The pre-irradiation technique is based on 2 phenomena occurring when the polarization is negative or equals to 0: the weak shift and the saturation of the threshold voltage.

  15. Pre- and post-flight radiation performance evaluation of the space GPS receiver (SGR); Evaluation de la tenue aux radiations, avant et apres lancement, du recepteur GPS spatial

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    Oldfield, M.K.; Underwood, C.I.; Unwin, M.J.; Asenek, V. [Surrey Univ., Surrey Space Centre, Guildford (United Kingdom); Harboe-Sorensen, R. [European Space Agency, ESA/ESTEC, Noordwijk (Netherlands)

    1999-07-01

    SSTL (Survey Satellite Technology Ltd), in collaboration with ESA/ESTEC, recently developed a state-of-the-art low cost GPS (Global Positioning System) receiver payload for use on small satellites. The space GPS Receiver (SGR), will be flown on the TiungSAT-1 micro-satellite, UoSAT-12 mini-satellite and ESA's PROBA satellite. The SGR payload is currently flying on the TMSAT micro-satellite in low Earth orbit (LEO) and has carried out autonomous on-board positioning whilst also providing an experimental test-bed for evaluating spacecraft attitude determination algorithms. In order to reduce development time and costs, the SGR consists solely of industry standard COTS (commercial off-the-shelf) devices. This paper describes the ground-based radiation testing of several payload-critical COTS devices used in the SGR payload and describes its on-orbit performance. (authors)

  16. Subventions aux institutions

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

    IDRC CRDI

    voir comment votre projet évolue eu égard à la recherche et aux aspects administratifs et financiers. Le CRDI sait bien que des problèmes peuvent surgir durant l'exécution des projets et reconnaît que les institutions qu'il finance appliquent des systèmes de comptabilité et des modalités administratives qui diffèrent des ...

  17. Role of endothelium in radiation-induced normal tissue damages; Role de l'endothelium dans les dommages radio-induits aux tissus sains

    Energy Technology Data Exchange (ETDEWEB)

    Milliat, F

    2007-05-15

    More than half of cancers are treated with radiation therapy alone or in combination with surgery and/or chemotherapy. The goal of radiation therapy is to deliver enough ionising radiation to destroy cancer cells without exceeding the level that the surrounding healthy cells can tolerate. Unfortunately, radiation-induced normal tissue injury is still a dose limiting factor in the treatment of cancer with radiotherapy. The knowledge of normal tissue radiobiology is needed to determine molecular mechanisms involved in normal tissue pathogenic pathways in order to identify therapeutic targets and develop strategies to prevent and /or reduce side effects of radiation therapy. The endothelium is known to play a critical role in radiation-induced injury. Our work shows that endothelial cells promote vascular smooth muscle cell proliferation, migration and fibro-genic phenotype after irradiation. Moreover, we demonstrate for the first time the importance of PAI-1 in radiation-induced normal tissue damage suggesting that PAI-1 may represent a molecular target to limit injury following radiotherapy. We describe a new role for the TGF-b/Smad pathway in the pathogenesis of radiation-induced damages. TGF-b/Smad pathway is involved in the fibro-genic phenotype of VSMC induced by irradiated EC as well as in the radiation-induced PAI-1 expression in endothelial cells. (author)

  18. Introduction aux notices

    OpenAIRE

    Calas, Bernard

    2012-01-01

    Construites par des étudiants – géographes comme politistes ou juristes – du Master « Dynamiques africaines », formation pluridisciplinaire commune aux universités de Bordeaux 2, 3 et IV et à l’Institut d’Études politiques de Bordeaux, ces cartes prouvent l’intérêt d’une courte formation (une vingtaine d’heures) pour amener à un niveau de pratique tout à fait honorable et d’un grand intérêt scientifique et performatif. Ces cartes peuvent donc se lire comme des études de cas de conflits africa...

  19. Prevention of risks in relation with occupational exposure to ionizing radiation; Prevention des risques lies a l'exposition professionnelle aux rayonnements ionisants

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    After remind the base notions in the field of ionizing radiation, this file evaluates the situation on the natural and occupational exposures: modes, sources, and exposure level, risk for health. It presents the principles of prevention allowing in a professional area (out of nuclear industry) to reduce and control these exposures. Some practical cases illustrate the radiation protection approach. references are given: regulatory benchmarks, useful links, books to consult. (N.C.)

  20. Aux origines du monde

    CERN Multimedia

    2004-01-01

    "C'est l'histoire d'une aventure humaine, scientifique, international qui a vu le jour il y a cinquante ans, aux confins de la Suisse et du département de l'Ain. Le plus grand laboratoire de physique des particules du monde, le Cern, a été fondé en 1954. Les festivités organisées à l occasion de cet anniversaire connaîtront leur point d'orgue le 16 octobre prochain, avec portes-ouvertes, accueil de personallités et inauguration d'un monumnet spécifique, le Globe de l'innovation" (2 pages)

  1. Workers' radioprotection: professional exposure to ionizing radiation in France: assessment for 2010; La radioprotection des travailleurs. Exposition professionnelle aux rayonnements ionisants en France: bilan 2010

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2011-07-01

    As more than 300.000 workers are potentially exposed to different artificial sources of ionizing radiation in different activity sectors in France (nuclear, industry, research, and medicine) and some others to natural radiation sources, this report proposes an assessment of these exposures for 2010. The report describes the monitoring of professional exposure (legal framework, monitoring modalities, means and actions of the IRSN), presents the methodology adopted for this annual assessment of workers' exposure to ionizing radiation. It gives this assessment for civilian activities submitted to an authorization or declaration regime and for defence activities (general results for external and internal exposures, exposure in the medical and veterinary sector, in the nuclear sector, in the industrial sector, in the research sector). It finally addresses the exposure of workers to natural radioactivity

  2. Foire aux questions concernant la Bourse du CRDI aux chercheurs ...

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

    Suis-je admissible à la bourse du CRDI aux chercheurs candidats au doctorat si je suis inscrit à un programme d'études de doctorat, mais que je n'ai pas encore commencé mes cours ? 6. Je suis citoyen d'un pays en développement. Suis-je admissible à la bourse du CRDI aux chercheurs candidats au doctorat ? 7.

  3. Environmental exposure to ionizing radiations and leukemia risk for children; Exposition environnementale aux rayonnements ionisants et risque de leucemie chez les enfants

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    Morin, A.; Backe, J.C. [CEA Fontenay aux Roses, Inst. de Protection et de Surete Nucleaire, DPHD/SEGR, 92 (France)

    2001-07-01

    In a first phase of the research, the measurement campaign has been done around nuclear sites. These evaluations have been made with the calculation codes F.O.C.O.N.96 1.0 and A.Q.U.A.R.E.J.2.5. for the adults, and the children of 1 5 and ten years old on a period of one year. In a second time, that is the doses estimation for the children that will be made for the others nuclear sites then on the relationship study between environmental exposure to ionizing radiations and the leukemia risk. (N.C.)

  4. Silicon P.I.N. Junctions used for studies of radiation damage; Etude de l'irradiation aux neutrons rapides du silicium au moyen de jonctions P.I.N

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

    1964-06-01

    Irradiation of silicon P.I.N. junction has been studied primarily for the purpose of developing a radiation damage dosimeter, but also for the purpose of investigating silicon itself. It is known that the rate of recombination of electrons and holes is a linear function of defects introduced by neutron irradiation. Two methods have been used to measure that rate of recombination: forward characteristic measurements, recovery time measurements. In order to explain how these two parameters depend on recombination rate we have given a theory of the P.I.N. junction. We have also given an idea of the carrier lifetime dependence versus temperature. Annealing effects in the range of 70 to 700 K have also been studied, we found five annealing stages with corresponding activation energies. As an application for these studies, we developed a radiation damage dosimeter with which we made several experiments in facilities such as Naiade or Marias. (author) [French] L'irradiation de structures P.I.N. etait faite dans le but d'etudier principalement la mise au point d'un dosimetre a ''radiation damage'' et aussi pour etudier plus profondement le silicium lui-meme. On sait que le taux de recombinaison electrons-trous est une fonction lineaire du taux de defauts introduits par irradiation aux neutrons. Deux methodes ont ete utilisees pour atteindre ce taux de recombinaison: mesures de la caracteristique directe, mesures du temps de retournement. Pour expliquer de quelle facon ces parametres dependent du taux de recombinaison. Nous avons donne une theorie de la jonction P.I.N. Nous avons aussi donne l'allure des variations du temps de vie des porteurs en fonction de la temperature. Nous avons d'autre part effectue des recuits entre 70 et 700 K, domaine dans lequel nous avons trouve cinq etapes de ''guerison'' avec les energies d'activation correspondantes. En application de ces etudes nous avons mis ou point un

  5. Radiation protection for innovative diagnostic and therapeutic approaches in nuclear medicine; Radioprotection associee aux nouvelles evolutions, diagnostiques et therapeutiques, en medecine nucleaire

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, B. [Institut de Radioprotection et de Surete Nucleaire (IRSN/DRPH/SER) United' expertise en Radioprotection Medicale, 92 - Fontenay-aux-Roses (France); Chatal, J.F. [Nantes Univ., UMR INSERM U 601, 44 - Nantes (France)

    2006-01-15

    A real technological revolution has deeply modified the field of application and perspectives of nuclear medicine, and nuclear oncology in particular, during the past 5 years. Diagnostic applications such as positron emission tomography (PET) with {sup 18}F-fluorodeoxyglucose (FDG) have had a significant impact on the diagnostic strategy adopted by medical oncologists, with the addition of invaluable functional data to already available anatomical data provided by conventional imaging modalities. Numerous other {sup 18}F-labeled tracers currently under clinical evaluation have been developed to study various tumor functions (tumor proliferation, hypoxia, hemo-therapy-induced apoptosis, etc.). These tracers may have a considerable impact on therapeutic strategies. Other positron-emitting radionuclides, such as copper-64, iodine-124, and yttrium-86 (whose respective half-lives are 12.7 hours, 4.2 days. and 14.7 hours) will soon be available for certain clinical indications, such as immuno-PET (with monoclonal antibodies or antibody fragments used as carriers) or pretreatment dosimetry, which cannot be performed with fluorine-18 due its short half-life. As far as therapeutic applications are concerned, the use of internal radiotherapy, which has been restricted to thyroid cancer for a long time, was recently extended to other cancers as new carriers, such as monoclonal antibodies (radioimmunotherapy) or peptides (radio-peptide therapy), new targeting methods (pre-targeting), and new radionuclides, especially alpha particle emitters (alpha therapy), became available. These technological advances require that specific radiation safety regulations be implemented to protect nuclear medicine personnel, patients' close relatives, and the environment. Most current regulations concern diagnostic applications with technetium-99m and therapeutic applications with iodine-131. Regulations pertaining to the clinical use of {sup 18}F-FDG were recently enacted (2001). Regarding

  6. Foire aux questions sur la bourse du CRDI aux chercheurs ...

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

    IDRC CRDI

    Est-ce que je peux utiliser une partie de la bourse pour payer son billet d'avion ? 1) Je suis étudiant au doctorat et la bourse du CRDI aux chercheurs candidats au doctorat m'intéresse. Pourriez-vous me faire parvenir de la documentation au sujet de cette bourse ? Tous les renseignements concernant la bourse du CRDI ...

  7. Bio modulation of transcriptional factor NF-kB by ionizing radiation; Biomodulation du facteur de transcription NF-kB par les radiations ionisantes

    Energy Technology Data Exchange (ETDEWEB)

    Magne, N.; Van Houtte, P. [Institut Jules-Bordet, Dept. de Radiotherapie, Bruxelles (Belgium); Mange, N.; Toillon, R.A. [Institut Jules-Bordet, Lab. de Cancerologie Mammaire, Bruxelles (Belgium); Didelot, C. [Universite Libre de Bruxelles, Lab. de Virologie Moleculaire (Belgium); Peyron, J.F. [Faculte de Medecine, INSERM U526, 06 - Nice (France)

    2004-10-01

    NF-{kappa}B (Nuclear Factor -{kappa}B) was described for the first time in 1986 as a nuclear protein binding to the kappa immunoglobulin-light chain enhancer. Since then, NF-{kappa}B has emerged as an ubiquitous factor involved in the regulation of numerous important processes as diverse as immune and inflammatory responses, apoptosis and cell proliferation. These last two properties explain the implication of NF-{kappa}B in the tumorigenic process as well as the promise of a targeted therapeutic intervention. This review focuses on the current knowledge on NF-{kappa}B regulation and discusses the therapeutic potential of targeting NF-{kappa}B in cancer in particular during radiotherapy. (authors)

  8. Radiation test results on COTS components needed for the large hadron collider at CERN; Resultats de tests aux radiations de composants COTS necessaires pour le large hadron collider au CERN

    Energy Technology Data Exchange (ETDEWEB)

    Rausch, R.; Tavlet, M. [CERN Conseil Europeen pour la recherche nucleaire, Lab. europeen pour la physique des particules, Geneve (Switzerland)

    1999-07-01

    Calculations have shown that the level of absorbed radiation dose inside the tunnel of the future LHC will be between 1 and 10 Gy pro year. This level of radiation allows the use of industry standard commercial-off-the-shelf (COTS) devices. For some COTS to be used at the LHC, on-line testing have started in a typical proton-accelerator radiation-field; mainly gammas and neutrons, plus some high-energy particles. After irradiations at about 100 Gy and a few 1.10{sup 12} n.cm{sup -2} (eq. 1 MeV-Si), fatal faults and important upset rates appear.

  9. METEOROLOGIE APPLIQUEE AUX SYSTEMES ENERGETIQUES

    OpenAIRE

    David, Mathieu

    2015-01-01

    Mes activités de recherche et d’enseignement au sein du laboratoire de Physique et Ingénierie Mathématique pour l’Énergie le bâtiment et l’environnemeNT (PIMENT), de l’École Supérieure d’Ingénieurs Réunion Océan Indien, de l’IUT de Saint-Pierre et de l’UFR Sciences de l’Homme et de l’Environnement de l’Université de La Réunion contribuent au développement de l’analyse météorologique appliquée aux systèmes énergétiques. En effet, la très grande majorité des systèmes énergétiques sont en intera...

  10. Guide relative to the modalities of statements and to the codification of criteria relative to the significant events involving the safety, the radiation protection or the environment applicable to the base nuclear installations and to the transport of radioactive matters; Guide relatif aux modalites de declaration et a la codification des criteres relatifs aux evenements significatifs impliquant la surete, la radioprotection ou l'environnement applicable aux installations nucleaires de base et au transport de matieres radioactives

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    It is necessary to analyze the events detected on an installation in order to be sure that an already occurred event does not be repeated, by taking into account the appropriate remedial measures, to avoid a worsen situation could occur by analyzing the potential consequences of precursory events of more serious ones, to promote the correct practices to improve the safety. The present guide has for vocation to define the arrangements enforceable to nuclear operators about the statements modalities of such events when these ones concern the safety of nuclear facilities, transport of radioactive matters, radiation protection or environmental protection. In any case it can substitute to the specific obligations coming from the work code, public health code and environment code, licensing decrees about releases. (N.C.)

  11. Aux marges du monde arabe

    Directory of Open Access Journals (Sweden)

    Hélène Thiollet

    2004-09-01

    Full Text Available L’étude des migrations contemporaines des Érythréens vers le Yémen au tournant des années quatre-vingt-dix permet d’observer les transformations des dynamiques régionales à l’œuvre dans le monde arabe. Les migrations sont un phénomène sensible aux différents aspects (politiques, économiques, culturels, géographiques de l’intégration régionale. Celle si est envisagée dans cet article à travers une approche doublement marginale : -la marginalité géographique de l’Érythrée arabo-africaine et du Yémen, économi­quement isolé dans la péninsule Arabique, -l’étude des migrations formelles et informelles, élément souvent marginal dans l’étude des institutions et des échanges qui constituent un système régional intégré. Cette étude est fondée sur une série d’entretiens menés au Yémen entre février et avril 2002 auprès des administrations yéménites et de la population érythréenne.

  12. L'adaptation aux changements climatiques

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

    Cathy Egan

    plus équitables et plus prospères. Centre de recherches pour le développement international, CP 8500, Ottawa (Ontario) Canada K1G 3H9. Tél. : 613-236-6163 • Télécopieur : 613-238-7230 • Courriel : info@crdi.ca. L'ADAPTATION AUX. CHANGEMENTS CLIMATIQUES. LE RECOURS AUX. ONDES. Les petits exploitants ...

  13. Order of 30 March 1988 on licensing of gaseous radioactive effluent releases by the Fontenay-aux-Roses Nuclear Research Centre

    International Nuclear Information System (INIS)

    1988-01-01

    This Decree prescribes the documents and information the Fontenay-aux-Roses Nuclear Research Centre must provide to the Central Service for Protection against Ionizing Radiation (SCPRI) and lays down the permissible effluent release limits for the Centre [fr

  14. Assessment of risks associated to ionizing radiations: lung cancers after domestic radon exposure and thyroid cancers after accidental exposure to radioactive iodines; Evaluation des risques associes aux rayonnements ionisants: cancers du poumon apres exposition domestique au radon et cancers de la thyroide apres exposition accidentelle aux iodes radioactifs

    Energy Technology Data Exchange (ETDEWEB)

    Catelinois, O

    2004-09-15

    The aim of this work is to develop a critical analysis of quantitative risk assessment in the field of ionizing radiation and to provide new estimates of attributable risks for particular situations of environmental exposure to ionizing radiation. This work is based on knowledge about dose-response relationships and ionizing radiation exposure of the general population. The work focuses on two different situations that both present an important interest for public health: lung cancer associated with domestic radon exposures (natural situation) and thyroid cancer associated with the Chernobyl accident fallout (accidental situation). The assessment of lung cancer risk associated with domestic radon exposure considers 10 dose-response relationships resulting from miner cohorts and case-control studies in the general population. A critical review of available data on smoking habits has been performed and allowed to consider the interactions between radon and tobacco. The exposure data come from measurements campaigns carried out since the beginning of the 1980 by the Institute for Radiation protection and Nuclear Safety and the Health General Directory in France. The French lung cancer mortality data are provided by the I.N.S.E.R.M.. Estimates of the number of attributable cancers are carried out for the whole country, stratified by 8 large regions (Z.E.A.T.) and by 96 departments for the year 1999 allowing to perform a sensibility analysis according to the geographical level of calculation. Uncertainties associated to risk coefficients and exposures have been quantified and it's impact on risk estimates is calculated. The estimated number of deaths attributable to domestic radon exposure ranges from 543 (90% uncertainty interval (U.I.): 75-1,097) to 3,108 (90% U.I.: 2,996-3,221). The corresponding risk fractions range from 2.2% (90% U.I.: 0.3%-4.4%) to 12.4% (90% U.I.: 11.9%-12.8%). The assessment of thyroid cancer risk in the most exposed area of France due to

  15. Radiative transfer modelling in combusting systems using discrete ordinates method on three-dimensional unstructured grids; Modelisation des transferts radiatifs en combustion par methode aux ordonnees discretes sur des maillages non structures tridimensionnels

    Energy Technology Data Exchange (ETDEWEB)

    Joseph, D.

    2004-04-01

    The prediction of pollutant species such as soots and NO{sub x} emissions and lifetime of the walls in a combustion chamber is strongly dependant on heat transfer by radiation at high temperatures. This work deals with the development of a code based on the Discrete Ordinates Method (DOM) aiming at providing radiative source terms and wall fluxes with a good compromise between cpu time and accuracy. Radiative heat transfers are calculated using the unstructured grids defined by the Computational Fluid Dynamics (CFD) codes. The spectral properties of the combustion gases are taken into account by a statistical narrow bands correlated-k model (SNB-ck). Various types of angular quadrature are tested and three different spatial differencing schemes were integrated and compared. The validation tests show the limit at strong optical thicknesses of the finite volume approximation used the Discrete Ordinates Method. The first calculations performed on LES solutions are presented, it provides instantaneous radiative source terms and wall heat fluxes. Those results represent a first step towards radiation/combustion coupling. (author)

  16. Report of transparency and nuclear safety 2007 CEA Fontenay aux Roses; Rapport transparence et securite nucleaire 2007 CEA Fontenay aux Roses

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    This report presents the activities of the CEA Center of Fontenay aux roses for the year 2007. After many years of decommissioning and dismantling of nuclear installations, the Center is now devoted (since 2005) to the development of research programmes on biology and biomedical technologies. The actions concerning the safety, the radiation protection, the significant events, the release control and the environmental impacts and the wastes stored on the center are discussed. (A.L.B.)

  17. Medical exposure of French population to ionizing radiations. Situation for the setting up of a perennial information system on medical exposure of the patients to ionizing radiations; Exposition medicale de la population francaise aux rayonnements ionisants. Etat des lieux pour la mise en place d'un systeme perenne d'information sur l'exposition medicale des patients aux rayonnements ionisants

    Energy Technology Data Exchange (ETDEWEB)

    Scaff, P.; Aubert, B. [Institut de Radioprotection et de Surete Nucleaire, 92 - Fontenay-aux-Roses (France); Donadieu, J.; Pirard, Ph. [Institut de Veille Sanitaire, 94 - Saint Maurice (France)

    2006-07-01

    The necessity of a information gathering system allowing to globally evaluate the contribution of medical exposure to the French population exposure and to know more particularly the most irradiating practices and these ones that reach the most sensitive populations has been emphasized in the 'Vrousos' report on the priorities in radiation protection and detailed in the actions planning for the patients surveillance to ionizing radiation exposure by the general direction of nuclear safety and radiation protection. So, the Institute of radiation protection and nuclear safety and the institute of health surveillance have decided to co-ordinate their efforts to implement an observatory of medical practice in radiology. This study should allow to know the average radiation dose delivered for each act and to know the nature and frequency of these acts. for example the average radiation dose in conventional radiology has been estimated between .66 to .83 mSv by year according to the lowest or highest hypothesis. The examinations of conventional radiology would contribute to 35% of the total dose delivered to population, scanography examinations to 40% and the nuclear medicine acts and interventional radiology for 20 to 25%. (N.C.)

  18. Facilities for external radiation accessible for investigation on biological studies - progress report may 2004; Les installations d'irradiation externe accessibles aux etudes de biologie - etat d'avancement mai 2004

    Energy Technology Data Exchange (ETDEWEB)

    Gaillard-Lecanu, E. [CEA Fontenay aux Roses (DSV/Carmin), 92 (France); Authier, N.; Verrey, B. [CEA Valduc, Dept. Recherche sur les Materiaux Nucleaires, 21 - Is-sur-Tille (France); Bailly, I. [CEA Bruyeres le Chatel, 91 (France). Dept. de Physique Theorique et Appliquee; Baldacchino, G.; Pin, S.; Pommeret, S.; Renault, J.Ph. [CEA Saclay, Dept. de Recherche sur Etat Condense, les Atomes et les Molecules, 91 - Gif sur Yvette (France); Bordy, J.M. [CEA Saclay, Dir. de la Recherche Technologique (DRT/DETECS/LNHB/LMD), 91 - Gif sur Yvette (France); Coffigny, H. [CEA Fontenay aux Roses, Dept. de Radiobiologie et de Radiopathologie, 92 (France); Cortela, L. [CEA Grenoble, ARC-Nucleart, 38 (France); Duval, D. [CEA Saclay, Schering - CIS bio International, 91 - Gif sur Yvette (France); Leplat, J.J. [CEA Saclay (DSV/DRR/LREG), 91 - Gif sur Yvette (France); Poncy, J.L. [CEA Fontenay aux Roses (DSV/DRR/SRCA), 92 (France); Testard, I. [CEA Caen (DSV/DRR/LRO-LARIA), 14 - Caen (France); Thuret, J.Y. [CEA Saclay (DSV/DBJC/SBGM), 91 - Gif sur Yvette (France)

    2004-07-01

    The Life Science Division of the Atomic Energy Commission is making an inventory of the various radiation sources accessible for investigation on the biological effects of ionizing radiation. In this field, a wide range of studies is being carried out at the Life Science Division, attempting to characterize the kind of lesions with their early biological consequences (on the various cell compartments) and their late biological consequences (deterministic or stochastic effects), in relation to the radiation type and dose, especially at low doses. Several experimental models are available: plants, bacteria, eukaryotic cells from yeast up to mammalian cells and in vivo studies, mostly on rodents, in order to characterize the somatic late effects and the hereditary effects. Due to the significant cost of these facilities, also to their specific properties (nature of the radiation, dose and dose rate, possible accuracy of the irradiation at the molecular level), the closeness is no longer the only criteria for biologists to make a choice. The current evolution is to set up irradiation infrastructures combining ionizing radiation sources themselves and specific tools dedicated to biological studies: cell or molecular biology laboratories, animal facilities. The purpose, in this new frame, is to provide biologists with the most suitable facilities, and, if possible, to change these facilities according to requirements in radiobiology. In this report, the basics of interactions of ionizing radiation with biological tissues are briefly introduced, followed by a presentation of some of the facilities available at the CEA for radiobiological studies. This panorama is not a comprehensive one, new data will be included as they advance, whether reporting existing facilities or if a new one is developed. (authors)

  19. Radiation

    International Nuclear Information System (INIS)

    2013-01-01

    The chapter one presents the composition of matter and atomic theory; matter structure; transitions; origin of radiation; radioactivity; nuclear radiation; interactions in decay processes; radiation produced by the interaction of radiation with matter

  20. Accès aux ressources internationales aux fins de la lutte antitabac ...

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

    Accès aux ressources internationales aux fins de la lutte antitabac en Bolivie : obstacles et possibilités. Malgré certains succès remportés en matière de lutte antitabac à l'échelle nationale et internationale, on dispose de peu de données probantes sur le financement ou le soutien international à cet égard dans les pays en ...

  1. Participation des hommes aux soins aux enfants avant la mise en ...

    African Journals Online (AJOL)

    Participation des hommes aux soins aux enfants avant la mise en oeuvre de la composante familiale et communautaire de la stratégie «prise en charge intégrée des ... Aim : The purpose of this study was to assess the role played by the men in front of child illness before the implementation of the family and community ...

  2. Alteration of the digestive motility linked with radiation-induced inflammatory processes in rats; Alterations de la motricite digestive associees aux processus inflammatoires induits par les rayonnements ionisants chez le rat

    Energy Technology Data Exchange (ETDEWEB)

    Picard, C

    2000-12-01

    Exposure to ionizing radiation, whether accidental or for medical reasons, may lead to gastro-intestinal injury, characterized by nausea, vomiting, diarrhea and abdominal cramps. The aetiology of radiation-induced diarrhea remains to date unclear. In this study, we have investigated the acute effects of a 10 Gy abdominal irradiation on rat digestive functions. The objective of the first study was to evaluate the role of sensory afferent neurons, capsaicin-sensitive, on morphological changes and the inflammatory response following exposure. Three days after irradiation, we observed an inflammatory response characterized by neutrophils infiltration and mast cells de-granulation. No effect of capsaicin pre-treatment was seen on these parameters. However, neutrophils infiltration was increased as early as one day after irradiation in capsaicin-treated rats. No difference in severity of diarrhea was observed after denervation nor in morphological changes. These data demonstrate that abdominal irradiation results in diarrhea concomitant with an inflammatory response, and that sensory innervation does not play a major protective role. The objective of the rest of the work was in the first instance to characterize radiation-induced alterations of intestinal and colonic motility leading to diarrhea and secondly to evaluate the role of serotonin in such disorders. Perturbations in intestinal (MMC) and colonic (LSB) motor profiles were observed from the first day onwards. Migrating motor complexes (MMC) were completely disrupted at three days at the same time as the onset of diarrhea. In addition to inhibition of LSB, colonic fluid absorptive capacity was decreased and serotonin colonic tissue levels were increased three days after irradiation. Radiation-induced diarrhea was reduced by treatment with an antagonist of 5-HT{sub 3} receptors, granisetron, as were alterations of colonic motility and serotonin tissue levels. However, this treatment did not significantly ameliorate

  3. The exposure data and fitness for work assessment form for personnel exposed to ionizing radiation; Fiche d'exposition et d'aptitude du personnel expose aux rayonnements ionisants

    Energy Technology Data Exchange (ETDEWEB)

    Amabile, J.C.; Castagnet, X.; Bohand, S.; Granger-Veyron, N.; Anziani, P.; Michiels, F.; Laroche, P. [Hopital des Armees du Val-de-Grace, 75 - Paris (France)

    2008-06-15

    This document answers new lawful obligations in a practical and simplified way: it presents on the same page an exposure data sheet and a fitness for work assessment form. A copy must be included in the individual radiobiological and medical file. In a first time, the P.C.R. (person competent in radiation protection) has to describe precisely radiological hazards of the working station during usual conditions of exercise. In a second time, the occupational physician gives a decision on the aptitude based on these informations. (N.C.)

  4. Implementation of an information system on the medical exposure to ionizing radiation; Mise en place d'un systeme d'information sur l'exposition medicale aux rayonnements ionisants

    Energy Technology Data Exchange (ETDEWEB)

    Etard, C.; Aubert, B. [Institut de Radioprotection et de Surete Nucleaire (IRSN), 92 - Fontenay aux Roses (France); Sinno-Tellier, S. [Saint-Maurice (France)

    2005-10-15

    The national institute of sanitary surveillance (I.n.V.S.) and I.R.S.N. collaborate since 2003 to build a perennial information system on the medical exposure to ionizing radiation of the French population (Ex.P.R.I. system). These data will allow to update the estimation of the average annual dose per caput, and will inform on its distribution by sex, age and on the number of effectively exposed persons. Thanks to the common project of I.R.S.N. and I.n.V.S., to the contributions of illness assurance and professional, the data of exposure in 2002 will be updated and enriched. A report will be published at the beginning of 2009. (N.C.)

  5. Functional modifications of the enteric nervous system following radiation exposure: short and long term effects; Modifications du fonctionnement du systeme nerveux enterique suite a une exposition aux rayonnements ionisants: effets precoces et a long terme

    Energy Technology Data Exchange (ETDEWEB)

    Ropenga, A

    2003-09-15

    Exposure of the gastrointestinal tract to ionising radiation induces at short or at long term, digestive dysfunctions, including nausea, diarrhoea, constipation and eventually abdominal pain. The mechanisms implicated remain incompletely understood, but may involve at long term functional modifications of the enteric nervous system (ENS). The mediator 5-Hydroxytryptamine (5-HT, serotonin) is present in entero-chromaffin cells and the ENS and plays an important role in digestive functions. The aim of this work was to follow between 3 days and 3 months after an hemi-body irradiation (10 Gy, X rays) radiation-induced modifications of 5-HT content, 5-HT receptor expression and effects on electrolyte movement in rat distal colon. At 3 days following irradiation, a reduction of total epithelial cells was observed along with a diminution of 5-HT transporter expression. Receptors 5-HT{sub 1A} and 5-HT{sub 2A} expression was diminished concomitant with a reduced response to 5-HT or neural stimulation and an increased importance of the receptor 5-HT{sub 3}. At 7 days crypt total cell number was increased and the importance of receptors 5-HT{sub 2A} and 5-HT{sub 3} in the secretory response was also increased. At later times, between 28 and 43 days, irradiation increased mucosal 5-HT content. This increase can be related to an increase of the number of entero-chromaffin cells at 28 days and is concomitant with the diminution of the importance of the receptor 5-HT{sub 2A} in the secretory response. In conclusion, this project has established for the first time differential expression of 5-HT receptors in the mucosal and muscle layers in the distal colon. Moreover, irradiation induces modifications in 5-HT receptor expression and importance in secretory epithelial responses. Irradiation also disturbs the equilibrium of different cell types by the epithelium in increasing the number of entero-chromaffin cells containing 5-HT. (author)

  6. Honoraires versés aux gouverneurs

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

    André Lavoie

    Pour tous les gouverneurs à l'exclusion du président du Conseil : 410 CAD par jour;. • Pour le président du Conseil : 420 CAD par jour; b) Pour ce qui est de la préparation, la présence et la participation aux réunions des comités du. Conseil, les honoraires des gouverneurs doivent être versés selon des taux équivalant à la ...

  7. Adaptation aux changements climatiques dans les zones ...

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

    Adaptation aux changements climatiques dans les zones périurbaines de l'Asie du Sud-Est. La croissance rapide des zones périurbaines de l'Asie du Sud-Est est caractérisée par un manque de services de base, des milieux bâtis non planifiés et la relative faiblesse des gouvernements. Les habitants de ces zones sont ...

  8. Aux origines de la science moderne

    CERN Document Server

    Rossi, Paolo

    1999-01-01

    Aux origines de la science moderne. " Lorsque l'on aborde l'étude d'une pensée qui n'est plus la nôtre, il est important de chercher à oublier ce que nous savons ou croyons savoir. " Pour appréhender cette période fondatrice que fut la Révolution scientifique du XVIIe siècle en Europe, Paolo Rossi nous replonge dans des atmosphères intellectuelles et des modes de pensée depuis longtemps disparus. Des secrets hermétiques aux calculs mathématiques, de la magie au magnétisme et des cabinets de curiosité aux premières académies des sciences défilent ainsi des notions et des individus qui, remis en toute simplicité dans le contexte de leur époque, retrouvent une épaisseur et un sens nouveaux. Ainsi racontée sous la forme d'une histoire des idées, l'histoire des sciences devient accessible à tous.

  9. La recherche-action participative facilite l'adaptation aux ...

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

    Application de la recherche-action participative à l'adaptation aux changements climatiques en Afrique : manuel de référence fait état des enseignements que les chercheurs ont tirés de leur expérience en recherche-action participative et fournit des renseignements utiles destinés aux chercheurs, aux responsables des ...

  10. Administration des subventions aux institutions Dépenses de projet ...

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

    IDRC CRDI

    Consultants. Cette catégorie comprend toutes les dépenses engagées pour retenir les services d'un consultant aux ... déplacement, d'hébergement et de subsistance, ainsi qu'aux services de soutien retenus directement ... le transport aérien et les autres dépenses afférentes aux déplacements du personnel du projet à.

  11. Examen des Réactions D’intolérance aux Aliments et aux Additifs Alimentaires

    OpenAIRE

    Hayder, Hikmat; Mueller, Utz; Bartholomaeus, Andrew

    2011-01-01

    La communauté manifeste un intérêt soutenu à l’égard des réactions d’intolérance aux aliments et aux additifs alimentaires. Pour éclairer les discussions à ce sujet, l’agence FSANZ a entrepris un examen scientifique visant à approfondir les principaux enjeux qui sous‐ tendent le débat public. Le présent document fait état de la compréhension actuelle des intolérances alimentaires et met en évidence la variabilité des réactions d’intolérance selon les individus, de même...

  12. Thermodynamique des moteurs thermiques aux structures dissipatives

    CERN Document Server

    Prigogine, Ilya

    1999-01-01

    Ce livre constitue à la fois une présentation complète de la thermodynamique et une introduction scientifique à l'œuvre de Prigogine. Les auteurs innovent en montrant comment la thermodynamique du non-équilibre est un prolongement naturel de la thermodynamique de l'équilibre. Elle constitue ainsi la science des processus irréversibles - " la flèche du temps " - dont les structures dissipatives sont les témoignages les plus éclatants. Les développements historiques en font, non seulement un texte de référence, mais aussi un livre de culture. Les nombreux exemples et exercices, comme les programmes informatiques et les références aux sites Internet en font un outil de travail irremplaçable.

  13. Radiation

    International Nuclear Information System (INIS)

    Davidson, J.H.

    1986-01-01

    The basic facts about radiation are explained, along with some simple and natural ways of combating its ill-effects, based on ancient healing wisdom as well as the latest biochemical and technological research. Details are also given of the diet that saved thousands of lives in Nagasaki after the Atomic bomb attack. Special comment is made on the use of radiation for food processing. (U.K.)

  14. Communications en cas de catastrophe faisant appel aux TIC pour ...

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

    Communications en cas de catastrophe faisant appel aux TIC pour les collectivités vulnérables des Caraïbes. De récents événements survenus dans les Caraïbes ont mis en relief les insuffisances des mesures régionales et nationales de préparation aux catastrophes. On manque particulièrement de systèmes d'alerte ...

  15. Donner aux travailleurs du sexe les moyens de consigner les ...

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

    Dans la plupart des sociétés, le travail du sexe est fortement stigmatisé, et ceux qui le pratiquent sont en butte aux reproches, à la désapprobation et à la discrimination. Par conséquent, la violence faite aux travailleurs du sexe se voit peu, et dans certains contextes, elle est même tolérée. On dispose donc de très peu de ...

  16. Resistance aux antibiotiques des bacteries isolees en 2009 au ...

    African Journals Online (AJOL)

    Objectif : Contribuer à la surveillance de la résistance bactérienne aux antibiotiques au Togo en étudiant la résistance aux antibiotiques des bactéries. Méthode Il s'agit d'une étude descriptive transversale portant sur les comptes rendus des antibiogrammes réalisés du 1er janvier au 31 décembre 2009 au Laboratoire de ...

  17. Donner la parole aux femmes - bourse de recherche sur la ...

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

    16 mai 2016 ... Donner la parole aux femmes - bourse de recherche sur la militarisation et les femmes en Asie du Sud destinée aux journalistes. L'Asie du Sud est la région la plus densément peuplée du monde et, selon les indicateurs de pauvreté, la deuxième plus pauvre, après l'Afrique subsaharienne. Il s'agit ...

  18. Bourse du CRDI aux chercheurs candidats au doctorat 2017 | CRDI ...

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

    Avant de faire une demande, veuillez lire les documents suivants : Liste de vérification des documents que doit remettre le candidat · Foire aux questions générales · Foire aux questions techniques en cas de difficultés d'ordre technique au moment de remplir la demande en ligne; Lettre type d'approbation du directeur de ...

  19. Participation du secteur de la sécurité privé aux conflits et aux ...

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

    Participation du secteur de la sécurité privé aux conflits et aux opérations de maintien de la paix et d'assistance humanitaire en Afrique. En 2006, l'Institute for Security Studies (ISS) a entrepris un projet portant sur la réglementation du secteur de la sécurité privé en Afrique, financé par le CRDI dans le cadre du projet no ...

  20. Recherche sur l'adaptation aux changements climatiques

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

    Corey Piccioni

    consortiums travaillent dans des zones vulnérables aux changements climatiques en Afrique et en Asie, notamment dans les bassins hydrographiques alimentés .... Le projet de recherche Pathways to Resilience in Semi-Arid Economies (PRISE) vise à réduire les risques et à opti- miser les possibilités de développement ...

  1. Inobservance therapeutique aux anti-retroviraux chez les personnes ...

    African Journals Online (AJOL)

    Buts : Rechercher les facteurs psychologiques ou psychosociaux responsables de l'inobservance thérapeutique (IBT) aux antiretroviraux (ARV) Méthodologie : Il s'agit d'une étude transversale sur 06 mois (mai - octobre 2008) menée au centre de promotion sociale à Lomé chez les personnes vivant avec le VIH (PVVIH) ...

  2. L'adaptation aux changements climatiques | CRDI - Centre de ...

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

    Appuyée par le CRDI, l'Agence canadienne de développement international et le Fonds international de développement agricole, l'initiative WADImena favorise également les ... Les déchets : pollution visuelle, risque pour la santé et polluants environnementaux. ... UNE PLUS GRANDE RÉSILIENCE AUX CATACLYSMES.

  3. evolution de la frequence et des problemes lies aux evacuations ...

    African Journals Online (AJOL)

    EVOLUTION DE LA FREQUENCE ET DES PROBLEMES LIES AUX. EVACUATIONS SANITAIRES VERS LE SERVICE DE GYNECOLOGIE-OBS-. TETRIQUE DE L'HOPITAL COMMUNAUTAIRE DE BANGUI. SEPOU A.1; GODDOT M.1; NGBALE R.1;GAUNEFET C.E.1; DOMANDE-MODANGA Z.1;. FANDEMA E.1 ...

  4. Une societe aux reperes ambigus | Belinga | African Anthropologist

    African Journals Online (AJOL)

    Une societe aux reperes ambigus. JMZ Belinga. Abstract. No Abstract. Full Text: EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · http://dx.doi.org/10.4314/aa.v10i1.46101 · AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians ...

  5. Programme mondial de recherche sur l'adaptation aux ...

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

    Le Programme mondial de recherche sur l'adaptation aux changements climatiques (maintenant connu sous le nom d'Initiative de recherche concertée sur l'adaptation en Afrique et en Asie, ou IRCAAA) est un nouveau partenariat entre le CRDI et le Department for International Development du Royaume-Uni.

  6. Exposition et intoxication aux pesticides chez des producteurs de ...

    African Journals Online (AJOL)

    Conclusion: Dans la perspective d'une meilleure gestion des risques liés aux pesticides, il est nécessaire que tous les acteurs du secteur cotonnier oeuvrent pour le renforcement des mesures préventives. Mots-clés: Exposition, intoxication, pesticides, coton, Togo. English Title: Pesticides exposure and intoxication among ...

  7. Alimentation, santé et adaptation aux changements climatiques en ...

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

    Est, sont particulièrement vulnérables, à long terme, aux conséquences des changements climatiques et, à court terme, à la variabilité accrue du climat. Ce projet abordera la question des moyens de subsistance dans le " corridor du bétail " de ...

  8. Partage de connaissances sur l'adaptation aux changements ...

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

    En bref, il sera un outil qui permettra aux africains de prendre charge de la problématique d'adaptation au changements climatiques au niveau local, national et continental, et de ... L'Initiative des conseils subventionnaires de la recherche scientifique en Afrique subsaharienne remporte le prix de la diplomatie scientifique.

  9. Isolation and characterization of an Aux/IAA gene (LaIAA2) from Larix

    African Journals Online (AJOL)

    微软用户

    auxin would be expected to maintain little Aux/IAA protein, having ARFs dissociated from Aux/IAA proteins. This allows for expression changes in typically auxin-regulated genes. The functions of Aux/IAA proteins in growth and development are determined by mutations in Arabidopsis or other plants. The gain-of-function ...

  10. AUX: a scripting language for auditory signal processing and software packages for psychoacoustic experiments and education.

    Science.gov (United States)

    Kwon, Bomjun J

    2012-06-01

    This article introduces AUX (AUditory syntaX), a scripting syntax specifically designed to describe auditory signals and processing, to the members of the behavioral research community. The syntax is based on descriptive function names and intuitive operators suitable for researchers and students without substantial training in programming, who wish to generate and examine sound signals using a written script. In this article, the essence of AUX is discussed and practical examples of AUX scripts specifying various signals are illustrated. Additionally, two accompanying Windows-based programs and development libraries are described. AUX Viewer is a program that generates, visualizes, and plays sounds specified in AUX. AUX Viewer can also be used for class demonstrations or presentations. Another program, Psycon, allows a wide range of sound signals to be used as stimuli in common psychophysical testing paradigms, such as the adaptive procedure, the method of constant stimuli, and the method of adjustment. AUX Library is also provided, so that researchers can develop their own programs utilizing AUX. The philosophical basis of AUX is to separate signal generation from the user interface needed for experiments. AUX scripts are portable and reusable; they can be shared by other researchers, regardless of differences in actual AUX-based programs, and reused for future experiments. In short, the use of AUX can be potentially beneficial to all members of the research community-both those with programming backgrounds and those without.

  11. Report on nuclear safety and transparency 2011 - Fontenay-aux-Roses CEA centre

    International Nuclear Information System (INIS)

    2012-06-01

    After a brief presentation of the Fontenay-aux-Roses CEA centre, this report indicates the different safety measures in the different nuclear base installations (INB) of this site (measures related to different risks, to emergency situations, to inspections and audits). It describes measures related to radiation protection: organisation, dosimetry results. It presents the different significant events which occurred in 2011 and were declared to the ASN. It discusses the results of measurements of liquid, gaseous and chemical releases from the installations and their impact on the environment. It addresses the radioactive waste management (measures to limit their volume and to limit their impact on health and on the environment, notably on water and soils, type and quantities of wastes stored in INBs). It presents the different measures and actions related to information transparency

  12. Sensibilisation aux gestes et postures de travail - French version only

    CERN Multimedia

    2004-01-01

    Nous vous proposons un nouveau cours de sécurité lié aux manutentions manuelles (durée 1 jour) : Sensibilisation aux gestes et postures de travail. Si vous êtes amené à manipuler régulièrement des charges lourdes ou volumineuses, cette formation peut vous aider à prévenir les lésions musculaires ou dorsales. A l'issue de cette formation, vous serez capable d'adopter et d'appliquer les principes de base de sécurité physique et d'économie d'efforts dans les manipulations d'objets. Les cours sont pris en charge par la Commission de Sécurité. L'inscription EDH est obligatoire. Pour plus d'information, veuillez consulter les pages Formation & Développement (Groupe Sécurité)

  13. Adaptation aux changements climatiques des bassins versants en ...

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

    Les résultats de recherche seront diffusés dans des publications scientifiques à comité de lecture, dans le cadre d'une interaction critique avec la sphère des politiques, ainsi qu'à l'occasion d'un institut d'été destiné aux chercheurs et ... The Trustees of Ashoka Trust for Research in Ecology and the Environment (ATREE).

  14. Foire aux questions: Bourse de recherche 2018 du CRDI | CRDI ...

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

    Vous remarquerez que d'importantes modifications ont été apportées aux critères d'admissibilité dans les deux dernières années. 2) Je suis étudiant à la maîtrise. Suis-je admissible à une bourse de recherche ? En principe oui. Toutefois, il est important de lire les spécifications du programme qui vous intéresse, car les ...

  15. Pour en finir avec la violence faite aux Palestiniennes | CRDI ...

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

    4 févr. 2011 ... À Gaza, la violence faite aux femmes est, fondamentalement, synonyme de violence au foyer », affirme Aitemad Muhanna, conseillère en recherche. « Les femmes sont battues par leur mari, battues par leur père et même battues par leurs frères. » Les femmes sont battues parce qu'elles ne remplissent ...

  16. CRDI foire aux questions | CRDI - Centre de recherches pour le ...

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

    1. Quels sont les éléments importants à mentionner dans ma demande d'emploi ? Il importe de démontrer, au moyen d'exemples concrets, de quelle façon vos qualifications correspondent aux exigences du poste en ce qui concerne les études, l'expérience et la langue. 2. Comment saurai-je si ma demande d'emploi a bel ...

  17. La recherche-action participative facilite l'adaptation aux ...

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

    Ces travaux comprenaient un riche portefeuille de recherches sur l'adaptation aux changements climatiques dans le secteur de l'agriculture. La méthodologie privilégiée dans le cadre du programme, la recherche-action participative, s'est avérée fructueuse et a permis de mettre au point et de déployer des solutions ...

  18. Accroissement du recours aux politiques fiscales dans la lutte ...

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

    Incidence de la hausse des taxes sur le tabac et du prix des produits du tabac en Ukraine, en Russie et au Bélarus. La recherche destinée aux responsables des politiques de l'Ukraine, de la Russie et du Bélarus mettra en évidence la façon dont les mesures de taxation des produits du tabac peuvent contribuer.

  19. Soutien aux processus d'élaboration des politiques de ...

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

    Les innovations biotechnologiques, ou bio-innovations, peuvent offrir des solutions aux problèmes liés à la sécurité alimentaire, à la pauvreté et à la détérioration de l'environnement. C'est notamment le cas des plantes génétiquement modifiées (GM), qui permettent d'accroître la production alimentaire tout en réduisant ...

  20. Aquaculture intérieure et adaptation aux changements climatiques ...

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

    Ce projet porte sur l'élevage du tilapia dans de petits étangs fermiers ou des cages flottantes dans les rivières et les réservoirs du nord de la Thaïlande. Les chercheurs exploreront des façons d'adapter les pratiques aquacoles aux changements climatiques et analyseront la valeur de l'aquaculture comme stratégie ...

  1. Le microdosage des engrais, une innovation qui profite aux femmes ...

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

    6 juin 2016 ... Plus de 1 000 agriculteurs, dont 30 % sont des femmes, ont ainsi obtenu davantage d'engrais qui ont servi à la production de cultures vivrières. Résultat : les femmes ont augmenté les superficies cultivées en ayant recours aux techniques de microdosage des engrais et de collecte des eaux de pluie, ...

  2. Mutational studies of the Aux/IAA proteins in Physcomitrella reveal novel insights into their function.

    Science.gov (United States)

    Tao, Sibo; Estelle, Mark

    2018-02-20

    The plant hormone auxin regulates many aspects of plant growth and development. Auxin signaling involves hormone perception by the TRANSPORT INHIBITOR RESPONSE/AUXIN F-BOX (TIR1/AFB)-Aux/IAA co-receptor system, and the subsequent degradation of the Aux/IAA transcriptional repressors by the ubiquitin proteasome pathway. This leads to the activation of downstream gene expression and diverse physiological responses. Here, we investigate how the structural elements in the Aux/IAAs determine their function in Auxin perception and transcriptional repression. We took advantage of the facile genetics of the moss Physcomitrella patens to determine the activity of wild-type and mutant PpIAA1a proteins in a Δaux/iaa null background. In this way, Aux/IAA function was characterized at the molecular and physiological levels without the interference of genetic redundancy. We identified and characterized degron variants in Aux/IAAs that affect their stability and Auxin response. We also demonstrated that neither the Aux/IAA EAR motif nor Aux/IAA oligomerization is essential for the repressive function of Aux/IAA. Our study demonstrates how key elements within the Aux/IAA proteins fine tune stability and repressor activity, as well as the long-term developmental outcome. © 2018 The Authors. New Phytologist © 2018 New Phytologist Trust.

  3. Un meilleur accès des pauvres aux produits d'assurance : politiques ...

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

    Un meilleur accès des pauvres aux produits d'assurance : politiques, réglementation et surveillance de la microassurance. Ce projet a pour objectif de faciliter l'accès des pauvres aux produits d'assurance afin de réduire leur vulnérabilité face aux risques. Pour ce faire, des études de cas seront réalisées dans cinq pays.

  4. Risques et possibilités liés aux changements climatiques pour les ...

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

    ... sociaux et environnementaux précis. Le projet permettra de diffuser des résultats aux milieux d'affaires, aux professionnels du développement, et aux principaux décideurs. Le partenaire local, Fundación Impulsora de un Nuevo Sector en la Economia Sistema B, possède des bureaux au Chili, en Colombie et au Pérou.

  5. Lancement de l'appel des bourses du CRDI aux chercheurs ...

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

    4 avr. 2018 ... Cet appel à propositions s'adresse aux citoyens canadiens, aux résidents permanents du Canada et aux citoyens de pays en développement inscrits au doctorat dans une université canadienne. Ces bourses servent à financer la réalisation de travaux de recherche sur le terrain visant à améliorer les ...

  6. Study of consequences of a ionizing radiation exposure on the health of persons having stay at the Marie Curie school of Nogent-sur-Marne (Val-de-Marne); Etude des consequences d'une exposition aux rayonnements ionisants sur la sante des personnes ayant sejourne a l'ecole Marie Curie de Nogent-sur-Marne (Val-de-Marne)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-03-01

    This study follows two other ones about the same subject. No one could bring elements to the question of the exposure impact on the population having stayed in the school. The old pupils and personnel have been exposed to radiation doses higher to the limit values of public exposure especially before 1987. The scientific knowledge suggest that the eventual sanitary consequences are in the area of low risks. The lack of exhaustiveness in the inquiry realisation and the lack of statistical power did not allow to measure the sanitary impact of ionizing radiation exposure among the former pupils of the Marie Curie school of Nogent sur Marne. (N.C.)

  7. Report on transparency and nuclear safety 2015 - Fontenay-aux-Roses CEA centre

    International Nuclear Information System (INIS)

    2016-06-01

    This document proposes, first, a presentation of the Fontenay-aux-Roses CEA centre, of its activities and installations. Then it gives a rather detailed overview of measures related to safety and to radiation protection within these activities and installations. Next, it reports significant events related to safety and to radiation protection which occurred in 2015 and which have been declared to the French nuclear safety authority (ASN). It discusses the results of release measurements (liquid and gaseous effluents, radiological assessment, and chemical assessment for various installations) and the control of the chemical and radiological impact of these gaseous and liquid effluents on the environment. Finally, it addresses the issue of radioactive wastes which are stored in the different nuclear base installations of the Centre. It indicates the different measures aimed at limiting the volume of these warehoused wastes and addresses their impact on health and environment. Nature and quantities of warehoused wastes are specified. Remarks and recommendations of the Health, Safety and Working Conditions Committee (CHSCT) are given

  8. Exposure to ionizing radiations having a medical origin. Propositions for the implementation and the development of epidemiology surveillance activities in general population; Exposition aux rayonnements ionisants d'origine medicale. Propositions pour la mise en place et le developpement d'activites de surveillance epidemiologique en population generale

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-09-01

    This report gives propositions relative to the implementation and the development of epidemiology surveillance activities in general population in relation with medical exposure to ionizing radiations. It is intended for the General Direction of Health and General Direction of Nuclear Safety and Radiation Protection. These propositions have been elaborated by a work group coordinated and run by InVS and gathering the following organisms: French Agency of sanitary safety of health products (A.F.S.S.A.P.S.), Center of Quality Assurance of technological applications in the area of health (C.A.A.T.S.), Direction of Hospitals and Care organization (D.H.O.S.), General Direction of Health (D.G.S.), General Direction of Nuclear Safety and Radiation Protection (D.G.S.N.R.), National Federation of radiologists physicists (F.N.M.R.), institute of Radiation Protection and Nuclear Safety (I.R.S.N.), INSERM 'epidemiology of cancers', French Society of Biology and Nuclear Medicine (S.F.B.M.N.), French Society of Medical Physics (S.F.P.M.), French Society of Radiology (S.F.R.). (N.C.)

  9. Résistance aux antibiotiques de Yersinia pestis

    OpenAIRE

    2014-01-01

    2001 : séquençage du génome de Yersinia pestis2004 : séquençage du génome de Rattus norvegicus. Une des préoccupations majeures du Programme national de lutte contre la peste (PNLP) à Madagascar est la surveillance de la sensibilité des souches de Y. pestis aux antibiotiques classiquement utilisables dans le traitement de cette maladie (streptomycine, tétracycline, chloramphénicol, gentamycine, sulfaméthoxazole-triméthoprime, ampicilline). Le PNLP recommande la chimioprophylaxie des sujets co...

  10. Foire aux questions: Bourse de recherche 2017 du CRDI | CRDI ...

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

    1) Si l'on décide de m'attribuer une bourse de recherche, aurai-je besoin d'un permis de travail ? Veuillez lire les détails sur ce sujet sous la rubrique Admissibilité à la page Web de l'appel. Vous remarquerez que d'importantes modifications ont été apportées aux critères d'admissibilité cette année. 2) Je suis étudiant à la ...

  11. Aspects Phenotypiques De La Resistance Aux Β- Lactamines Des ...

    African Journals Online (AJOL)

    Objectif : Décrire les phénotypes de résistance aux bèta-lactamines des souches de Pseudomonas aeruginosa par la technique de l'antibiogramme en milieu gélosé. Matériel et méthode : Il s'agit d'une étude transversale réalisée du 1er septembre 2011 au 29 février 2012 sur des souches de Pseudomonas aeruginosa ...

  12. Safety Training: Sensibilisation aux gestes et postures de travail

    CERN Multimedia

    Laetitia Laddada

    2004-01-01

    If you wish to participate in one of the following courses, please discuss with your supervisor and apply electronically directly from the course description pages that can be found on the Web at: http://www.cern.ch/Training/ or fill in an 'application for training' form available from your Divisional Secretariat or from your DTO (Divisional Training Officer). Applications will be accepted in the order of their receipt.Nous vous proposons un nouveau cours de sécurité lié aux manutentions manuelles (durée 1 jour) : Sensibilisation aux gestes et postures de travail. Si vous êtes amené à manipuler régulièrement des charges lourdes ou volumineuses, cette formation peut vous aider à prévenir les lésions musculaires ou dorsales. A l'issue de cette formation, vous serez capable d'adopter et d'appliquer les principes de base de sécurité physique et d'&e...

  13. Safety Training: Sensibilisation aux gestes et postures de travail

    CERN Multimedia

    Laetitia Laddada

    2004-01-01

    Nous vous proposons un nouveau cours de sécurité lié aux manutentions manuelles (durée 1 jour) : Sensibilisation aux gestes et postures de travail. Si vous êtes amené à manipuler régulièrement des charges lourdes ou volumineuses, cette formation peut vous aider à prévenir les lésions musculaires ou dorsales. A l'issue de cette formation, vous serez capable d'adopter et d'appliquer les principes de base de sécurité physique et d'économie d'efforts dans les manipulations d'objets. Les cours sont pris en charge par la Commission de Sécurité. L'inscription EDH est obligatoire. Pour plus d'information, veuillez consulter les pages Formation & Développement (Groupe Sécurité). FORMATION EN SECURITE SAFETY TRAINING Laetitia Laddada 73811 - 79236 safety.training@cern.ch

  14. Preparation and characterization of a ferrimagnetic amorphous alloy of GdCo entering the design of magnetic tunnel junctions: ionizing radiations hardness of magnetic tunnel junctions; preparation et caracterisation d'un alliage amorphe ferrimagnetique de GdCo entrant dans la conception de jonctions tunnel magnetiques. Resistance des jonctions tunnel magnetiques aux rayonnements ionisants

    Energy Technology Data Exchange (ETDEWEB)

    Conraux, Y

    2005-10-15

    The magnetic random access memories (MRAM) are on the way to supplant the other forms of random access memories using the states of electric charge, and this thanks to their many technical advantages: not-volatility, speed, low consumption power, robustness. Also, the MRAM are alleged insensitive with the ionizing radiations, which was not checked in experiments until now. The current architecture of the MRAM is based on the use of magnetic tunnel junctions (MTJ). These MRAM can present an important disadvantage, because they are likely of present errors of addressing, in particular when integration (density of memory cells) is increasingly thorough. The work undertaken during this thesis relates to these two points: - to check the functional reliability of the MRAM containing JTM exposed to high energy ionizing radiations; - to study a ferrimagnetic amorphous alloy, GdCo, likely to enter the composition of JTM and allowing to free from the possible errors of addressing by a process of thermal inhibition of the memory cells. This work of thesis showed that the MRAM containing JTM preserve their functional properties fully when they are subjected to intense ionizing radiations, and that GdCo is a very interesting material from the point of view of the solid state physics and magnetism, that its physical properties are very promising as for its applications, and that its integration in a JTM still claims technological developments. (author)

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

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

    Protection de la communauté urbaine de Cotonou face aux changements climatiques (Bénin). Ce projet vise à renforcer la capacité d'adaptation des populations de la communauté urbaine de Cotonou aux inondations. Il le fera en mettant en oeuvre un processus participatif de diagnostic, d'analyse et de planification de ...

  16. Un observatoire régional pour l'adaptation des producteurs aux ...

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

    22 avr. 2016 ... La présente note est le fruit de deux projets subventionnés par le programme Adaptation aux changements climatiques en Afrique : le projet de recherche InfoClim : plateforme pour l'adaptation des communautés vulnérables aux ... Participatory GIS for resource management in Africa: Taking stock.

  17. Un accès difficile aux services essentiels | CRDI - Centre de ...

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

    29 oct. 2015 ... Mise à jour | Villes sûres et inclusives​ Quelles sont les causes de la violence urbaine ? Un accès difficile aux services essentiels peut fomenter la concurrence et les conflits entre les groupes. Des solutions possibles ? Rendre accessibles aux communautés vulnérables l'eau potable, les services ...

  18. Carthage : la ‘Fontaine aux mille amphores’

    Directory of Open Access Journals (Sweden)

    Jean-Pierre Laporte

    2018-02-01

    Full Text Available Découverte par L. Carton en 1918, puis dégagée sous sa direction en 1919, la « Fontaine aux 1000 amphores » est aujourd’hui inaccessible. On peut cependant l’étudier grâce à différents textes, un plan et une coupe, ainsi que des cartes postales des années 1920-1935 environ . On pourra se demander quelle était la nature et la destination exacte de ce monument qui a connu plusieurs importants remaniements successifs. Il s’agissait en fait d’une source sacrée, probablement aménagée en nymphée, avec toutes les caractéristiques, maintenant bien connues, de ce genre d’établissement.

  19. L’ethnologue aux prises avec les archives - Introduction

    Directory of Open Access Journals (Sweden)

    Marie-Dominique Mouton

    2008-08-01

    Full Text Available Les textes présentés ici invitent à une réflexion sur les matériaux de terrain et plus largement sur la relation qui unit l’ethnologue aux archives, qu’il s’agisse des siennes, données vivantes, inspiratrices de sa recherche, de celles de ses aînés, devenues objets d’étude après leur dépôt dans une institution, ou de toutes les autres archives, constituées et rassemblées, à différentes époques, dans des perspectives administratives, juridiques, historiques ou religieuses, envisagées ici au tr...

  20. Monsieur Etienne Blanc Premier vice-président de la Région Auvergne-Rhône-Alpes Délégué aux finances, à l'administration générale, aux économies budgétaires et aux politiques transfrontalières

    CERN Multimedia

    Bennett, Sophia Elizabeth

    2017-01-01

    Monsieur Etienne Blanc Premier vice-président de la Région Auvergne-Rhône-Alpes Délégué aux finances, à l'administration générale, aux économies budgétaires et aux politiques transfrontalières

  1. Transferts aux petites échelles : application au rayonnement thermique, aux forces de Casimir et à la conduction thermique

    OpenAIRE

    Joulain, Karl

    2006-01-01

    Cette habilitation traite des transferts de chaleur et de quantité de mouvement aux courtes échelles d'espace et de temps. Une première partie du travail s'interesse au propriétés du rayonnement thermique en champ proche. Il est montré qu'en présence de matériaux supportant des ondes de surface, le champ électromagnétique d'origine thermique peut voir ses propriétés de cohérence changées entre le champ proche et le champ lointain, en particulier lorsque les matériaux mis en jeu supportent des...

  2. Signalization and repair of the DNA double-strand breaks of in the cerebral tumors: modulation of the radiation response with the chemotherapy treatments; Signalization et reparation des cassures double-brin de l'ADN dans les gliomes: modulation de la reponse aux traitements chimio-radiotherapeutiques

    Energy Technology Data Exchange (ETDEWEB)

    Marcinkova-Bencokova, Z

    2007-07-15

    There are about 6000 new cases of nervous system tumours each year in France. However, the current radio chemotherapeutic approaches against brain tumours remain still insufficient to produce a satisfactory therapeutic index. In parallel, the knowledge of the early radiobiological events has considerably progressed in the last few years. This thesis aims to provide new insights in the molecular and cellular response of brain tumours to radio chemotherapy. This thesis was divided into four stages. Stage 1: a novel DNA double-strand breaks repair pathway depending on the MRE11 protein but independent of the phosphorylation of H2AX emerged from the study of artefacts of the immunofluorescence technique and a systematic analysis of the radiosensitivity of human cells. Stage 2: the radiobiological features of 3 rodent models of glioma among the most used in preclinical trials and of 7 human glioma cell lines were investigated. Functional impairments of the BRCA1 protein in response to radiation and/or cisplatin were observed in the majority of the models tested, raising the question of the role of this protein in the anti-glioma treatments and in glioma genesis. Stage 3: in order to extend our approach to genetic syndromes associated with cerebral tumours predisposition, the radiobiological characteristics of the fibroblasts resulting from patients suffering from neurofibromatosis type 1 (NF1), a pathology associated with a strong incidence of peripheral nervous system tumours, were investigated. NF1 appeared to be a syndrome with moderated radiosensitivity, associated with a weak deficiency of DNA end-joining repair but with a strong activity of MRE11. These results enabled us to propose a preliminary model involving both proteins BRCA1 and NF1. Stage 4: considering the role of BRCA1 in the inhibition of some tyrosine kinase activity and in the response to cisplatin, we tested the radiobiological effects of treatments combining radiation, cisplatin and tyrosine kinase

  3. Variation in auxin sensing guides AUX/IAA transcriptional repressor ubiquitylation and destruction.

    Science.gov (United States)

    Winkler, Martin; Niemeyer, Michael; Hellmuth, Antje; Janitza, Philipp; Christ, Gideon; Samodelov, Sophia L; Wilde, Verona; Majovsky, Petra; Trujillo, Marco; Zurbriggen, Matias D; Hoehenwarter, Wolfgang; Quint, Marcel; Calderón Villalobos, Luz Irina A

    2017-06-07

    Auxin is a small molecule morphogen that bridges SCF TIR1/AFB -AUX/IAA co-receptor interactions leading to ubiquitylation and proteasome-dependent degradation of AUX/IAA transcriptional repressors. Here, we systematically dissect auxin sensing by SCF TIR1 -IAA6 and SCF TIR1 -IAA19 co-receptor complexes, and assess IAA6/IAA19 ubiquitylation in vitro and IAA6/IAA19 degradation in vivo. We show that TIR1-IAA19 and TIR1-IAA6 have distinct auxin affinities that correlate with ubiquitylation and turnover dynamics of the AUX/IAA. We establish a system to track AUX/IAA ubiquitylation in IAA6 and IAA19 in vitro and show that it occurs in flexible hotspots in degron-flanking regions adorned with specific Lys residues. We propose that this signature is exploited during auxin-mediated SCF TIR1 -AUX/IAA interactions. We present evidence for an evolving AUX/IAA repertoire, typified by the IAA6/IAA19 ohnologues, that discriminates the range of auxin concentrations found in plants. We postulate that the intrinsic flexibility of AUX/IAAs might bias their ubiquitylation and destruction kinetics enabling specific auxin responses.

  4. Medical exposure to ionizing radiations at diagnosis aim of the French population: situation at the end of 2002 in order to implement a surveillance system;Exposition medicale aux rayonnements ionisants a visee diagnostique de la population francaise: etat des lieux fin 2002 en vue de la mise en place d'un systeme de surveillance

    Energy Technology Data Exchange (ETDEWEB)

    Donadieu, J.; Pirard, Ph. [Institut de veille sanitaire, Saint-Maurice (France); Scanff, P.; Aubert, B. [Institut de Radioprotection et de Surete Nucleaire, 92 - Fontenay aux Roses (France)

    2006-04-15

    The principal result of this study, in the perspective of the implementation of an epidemiological follow-up of radiological practices, is to show that the scanner and the interventional radiology, that regroup about 8% and 1.5% of the examinations number, represent respectively about 35% and 19% of the dose to the population. These examinations are in regular progression these last years. A such evaluation allows to better adapt the efforts of the epidemiological surveillance of radiological practices. Our evaluation of the situation in France in 2002 allows a comparison with the previous data registered in France but also international comparisons. The comparison of French data during the twenty last years is based, firstly, on the comparison of the number of examinations. on this period, we observe a reduction of abdomen examinations with injection of contrast product without substitution at the profit of abdomen scanner but likely at the profit of non irradiating examinations such MRI or echography. Conversely, other indications of the scanner have been developed (head and thorax). The resultant of changes in the radiological practice in term of exposure to X radiation of the population is more difficult to analyse. In addition of the number of examinations, the radiological technique has reduced the exposure. More, the coefficient of weighting used for the calculation of efficient dose have been changed in 1990 with the passage of the ICRP 26 to the ICRP 60 recommendation. The international comparisons are also a problem of method: different approaches to compare acts, values of average efficient doses by examination are referred to doses established in Great britain when the real average efficient doses by examination vary from a country to another. An European project called 'Dose Datamed' is underway to homogenize the methods of collection. The strategies of examinations uses can be different in each country. The cumulative exposure of patients

  5. The identification and characterization of specific ARF-Aux/IAA regulatory modules in plant growth and development.

    Science.gov (United States)

    Krogan, Naden T; Berleth, Thomas

    2015-01-01

    The current model of auxin-inducible transcription describes numerous regulatory interactions between AUXIN RESPONSE FACTORs (ARFs) and Aux/IAAs. However, specific relationships between individual members of these families in planta remain largely uncharacterized. Using a systems biology approach, the entire suite of Aux/IAA genes directly regulated by the developmentally pivotal ARF MONOPTEROS (MP) was recently determined for multiple Arabidopsis tissue types. This study showed that MP directly targets distinct subclades of Aux/IAAs, revealing potential regulatory modules of redundantly acting Aux/IAAs involved in MP-dependent processes. Further, functional analyses indicated that the protein products of these targeted Aux/IAAs negatively feedback on MP. Thus, comprehensive identification of Aux/IAAs targeted by individual ARFs will generate biologically meaningful networks of ARF-Aux/IAA regulatory modules controlling distinct plant pathways.

  6. Outils d'acces aux donnees d'un PLC "Automate Web Access (AWA)"

    CERN Document Server

    Palluel, J; CERN. Geneva. AB Department

    2004-01-01

    Cette note presente un moniteur d'acces aux donnees d'un PLC Schneider ou Siemens, pouvant fonctionner sur n'importe quelle plateforme (Windows, Linux...) equipee d'un navigateur WEB sans telechargement de logiciel ("Applets").

  7. La fabrique des sciences des institutions aux pratiques

    CERN Document Server

    Benninghoff, Martin; Crettaz von Roten, Fabienne; Merz, Martina

    2006-01-01

    Aujourd'hui, les façons de produire, d'organiser, d'évaluer et d'utiliser les savoirs sont en profond débat. De plus en plus, l'Etat, la société civile et l'économie tentent d'influencer les activités des universités et des laboratoires de recherche. Ces développements mettent à l'épreuve tout à la fois les fondements des systèmes d'enseignement supérieur et de recherche, l'autonomie des institutions scientifiques, la définition des frontières des savoirs et l'acceptation des sciences. Dans des contextes suisses et européens, cet ouvrage s'intéresse aux manières dont les sciences et les technologies sont fabriquées, en analysant leurs institutions et les pratiques. A partir d'une approche relationnelle, les sciences et les technologies sont conçues comme des phénomènes profondément sociaux, culturels et politiques. Une telle démarche déstabilise les visions parfois idéalisées et stéréotypées de la construction des savoirs. Des études de cas détaillées décrivent des phénomè...

  8. Aux limites de la physique les paradoxes quantiques

    CERN Document Server

    Rothen, François

    2012-01-01

    Dans l’esprit des pères fondateurs de la science moderne, les phénomènes matériels se déroulent selon un schéma unique. La cause précède nécessairement l’effet, et la connaissance de l’effet permet de remonter à la cause. Sur la scène de la nature, le hasard n’occupe qu’une place congrue. On ne fait appel à lui que pour pallier notre ignorance. Dans les années 1920, la révolution quantique bouleverse ce cadre rigide. Elle accorde une place de choix au hasard, si malmené jusqu’alors, puis elle met en scène une constellation de phénomènes inexplicables aux yeux de la science dite classique. Après une courte introduction historique, l’auteur met ses lecteurs au contact de certains de ces phénomènes si contraires à l’intuition. Refusant l’aide du langage mathématique, il les convie à pénétrer dans un monde quantique qui déconcerte le novice avant de l’éblouir par sa nouveauté et sa cohérence. Un accent particulier est mis sur une application nouvelle de la physiqu...

  9. La transformation de la recherche aux Suds: politiques et résultats

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

    David O'Brien;Rigas Arvanitis

    des résultats de la recherche scientifique ; et les leçons relatives aux politiques publiques. Les propositions ... transformations et les écarts par rapport aux cadres de définition des politiques précédents. Dans leur ... l'impact de la recherche ainsi que des développements nouveaux ou expérimentaux, y compris des outils.

  10. Impact, en ce qui a trait aux revenus et à la santé, de la ...

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

    Impact, en ce qui a trait aux revenus et à la santé, de la restructuration de la taxe d'accise sur le tabac aux Philippines. Un projet de loi déposé par le gouvernement des Philippines visant à augmenter de 215 % la taxe d'accise sur le tabac est susceptible d'avoir une incidence sur la lutte antitabac et la consommation de ...

  11. Amélioration de la sécurité alimentaire et nutritionnelle aux ...

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

    Aux Philippines, on estime à 14 % la proportion d'écoliers qui souffrent de malnutrition aiguë. Les écoles offrent des voies stratégiques et ciblées pour fournir une alimentation nutritive aux enfants et, indirectement, à leurs familles et leurs collectivités. Un projet de recherche d'une durée de trois ans (de 2012 à 2015) a mis ...

  12. Résilience des villes face aux changements climatiques en Asie du ...

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

    Résilience des villes face aux changements climatiques en Asie du Sud-Est. La préparation aux changements climatiques est une tâche énorme pour les gouvernements de la région du Mékong, en Asie du Sud-Est. Le présent projet les aidera à gérer ces changements dans un contexte caractérisé par des capacités ...

  13. Adjoint aux conférences et au soutien administratif (h/f) | CRDI ...

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

    L' adjoint aux conférences et au soutien administratif est responsable du suivi et de la mise à jour de l'ensemble de formulaires, contrats et modèles utilisés dans les fonctions de gestion d'événements ainsi que de l'administration du site intranet des Services de conférence. L'adjoint aux conférences et au soutien ...

  14. Il faut agir pour aider Le Cap à s'adapter aux changements climatiques

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

    9 juin 2016 ... Ce livre porte sur les expériences menées au Cap et décrit les mesures novatrices qui y sont prises en vue de l'adaptation de la ville aux changements climatiques. On y présente les résultats du projet Gouvernance axée sur la collaboration : gestion des risques associés aux inondations et à l'élévation du ...

  15. Création d'une assise d'expertise en adaptation aux changements ...

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

    De 2006 à 2012, 212 organismes ont participé à des projets de recherche subventionnés par le programme Adaptation aux changements climatiques en Afrique (ACCA), et 89 % d'entre eux étaient des organismes africains. Comme il n'y avait guère d'établissements africains qui se penchaient sur les questions reliées aux ...

  16. Renforcement de la capacité d'adaptation aux changements ...

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

    Renforcement de la capacité d'adaptation aux changements climatiques en Zambie et au Zimbabwe. Ce projet vise à améliorer les mesures incitatives et les possibilités qui s'offrent aux ménages du sud de la Zambie et du sud-ouest du Zimbabwe pour composer avec les changements climatiques. Pour ce faire, les ...

  17. L'intensite du capital au Canada et aux Etats-Unis, 1987 a 2003

    OpenAIRE

    Baldwin, John R.; Fisher, Anthony; Gu, Wulong; Lee, Frank C; Robidoux, Benoit

    2008-01-01

    Les donnees officielles produites par les organismes statistiques ne sont pas toujours ideales aux fins de comparaisons entre pays en raison de differences relatives aux sources de donnees et de la methodologie. Les analystes qui procedent a des comparaisons entre pays doivent choisir avec soin entre plusieurs options et parfois adapter les donnees a leurs propres fins. Dans le present document, nous elaborons des estimations comparables du stock de capital pour examiner l'intensite relative ...

  18. À la suite de la parution d'un rapport sur les subventions aux ...

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

    7 juin 2016 ... Scott Wallace / The World Bank. John Cockburn. La protection sociale par le truchement de transferts en espèces peut-elle aider le Ghana à réduire l'écart grandissant que ses subventions aux carburants ont contribué à créer entre les riches et les pauvres ? Une récente étude sur les subventions aux ...

  19. Mettre un terme à la violence faite aux femmes | CRDI - Centre de ...

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

    13 nov. 2012 ... Il est essentiel que la violence faite aux femmes et aux filles sorte au grand jour, qu'on cesse de la justifier au nom de la “culture” ou de la “tradition” et que, collectivement, nous refusions d'excuser les ... Asia Justice and Rights (AJAR) ... Elle s'inscrit dans une culture où elle est sournoisement admise.

  20. Aux/IAA Gene Family in Plants: Molecular Structure, Regulation, and Function

    Directory of Open Access Journals (Sweden)

    Jie Luo

    2018-01-01

    Full Text Available Auxin plays a crucial role in the diverse cellular and developmental responses of plants across their lifespan. Plants can quickly sense and respond to changes in auxin levels, and these responses involve several major classes of auxin-responsive genes, including the Auxin/Indole-3-Acetic Acid (Aux/IAA family, the auxin response factor (ARF family, small auxin upregulated RNA (SAUR, and the auxin-responsive Gretchen Hagen3 (GH3 family. Aux/IAA proteins are short-lived nuclear proteins comprising several highly conserved domains that are encoded by the auxin early response gene family. These proteins have specific domains that interact with ARFs and inhibit the transcription of genes activated by ARFs. Molecular studies have revealed that Aux/IAA family members can form diverse dimers with ARFs to regulate genes in various ways. Functional analyses of Aux/IAA family members have indicated that they have various roles in plant development, such as root development, shoot growth, and fruit ripening. In this review, recently discovered details regarding the molecular characteristics, regulation, and protein–protein interactions of the Aux/IAA proteins are discussed. These details provide new insights into the molecular basis of the Aux/IAA protein functions in plant developmental processes.

  1. Protein-protein interaction and gene co-expression maps of ARFs and Aux/IAAs in Arabidopsis

    Directory of Open Access Journals (Sweden)

    Sarbottam ePiya

    2014-12-01

    Full Text Available The phytohormone auxin regulates nearly all aspects of plant growth and development. Based on the current model in Arabidopsis thaliana, Auxin/indole-3-acetic acid (Aux/IAA proteins repress auxin-inducible genes by inhibiting auxin response transcription factors (ARFs. Experimental evidence suggests that heterodimerization between Aux/IAA and ARF proteins are related to their unique biological functions. The objective of this study was to generate the Aux/IAA-ARF protein-protein interaction map using full length sequences and locate the interacting protein pairs to specific gene co-expression networks in order to define tissue-specific responses of the Aux/IAA-ARF interactome. Pairwise interactions between 19 ARFs and 29 Aux/IAAs resulted in the identification of 213 specific interactions of which 79 interactions were previously unknown. The incorporation of co-expression profiles with protein-protein interaction data revealed a strong correlation of gene co-expression for 70% of the ARF-Aux/IAA interacting pairs in at least one tissue/organ, indicative of the biological significance of these interactions. Importantly, ARF4-8 and 19, which were found to interact with almost all Aux-Aux/IAA showed broad co-expression relationships with Aux/IAA genes, thus, formed the central hubs of the co-expression network. Our analyses provide new insights into the biological significance of ARF-Aux/IAA associations in the morphogenesis and development of various plant tissues and organs.

  2. Protein-protein interaction and gene co-expression maps of ARFs and Aux/IAAs in Arabidopsis.

    Science.gov (United States)

    Piya, Sarbottam; Shrestha, Sandesh K; Binder, Brad; Stewart, C Neal; Hewezi, Tarek

    2014-01-01

    The phytohormone auxin regulates nearly all aspects of plant growth and development. Based on the current model in Arabidopsis thaliana, Auxin/indole-3-acetic acid (Aux/IAA) proteins repress auxin-inducible genes by inhibiting auxin response transcription factors (ARFs). Experimental evidence suggests that heterodimerization between Aux/IAA and ARF proteins are related to their unique biological functions. The objective of this study was to generate the Aux/IAA-ARF protein-protein interaction map using full length sequences and locate the interacting protein pairs to specific gene co-expression networks in order to define tissue-specific responses of the Aux/IAA-ARF interactome. Pairwise interactions between 19 ARFs and 29 Aux/IAAs resulted in the identification of 213 specific interactions of which 79 interactions were previously unknown. The incorporation of co-expression profiles with protein-protein interaction data revealed a strong correlation of gene co-expression for 70% of the ARF-Aux/IAA interacting pairs in at least one tissue/organ, indicative of the biological significance of these interactions. Importantly, ARF4-8 and 19, which were found to interact with almost all Aux-Aux/IAA showed broad co-expression relationships with Aux/IAA genes, thus, formed the central hubs of the co-expression network. Our analyses provide new insights into the biological significance of ARF-Aux/IAA associations in the morphogenesis and development of various plant tissues and organs.

  3. Des tables pascales aux tables astronomiques et retour.

    Directory of Open Access Journals (Sweden)

    Max Lejbowicz

    2006-05-01

    Full Text Available L’article étudie la naissance et le développement du calendrier ecclésiastique chrétien, i. e. le comput, depuis les premiers témoignages de la célébration annuelle de la résurrection de Jésus jusqu’aux traductions des tables astronomiques arabes au xiie siècle. Il privilégie les procédures qui aboutissent à la détermination des dates pascales et à leur mise en forme tabulaire. Les analyses sont conduites à partir d’un double point de vue. L’un est scientifique. Il s’appuie sur les données astronomiques retenues par Ptolémée et sur l’apport de la tradition mathématique grecque au calcul par approximations. Les cycles soli-lunaires sont posés à partir des fractions continues et le cycle soli-hebdomadaire à partir du plus petit commun multiple. Le second point de vue est social : l’unification du comput participe à celle de la chrétienté comprise comme une configuration politico-religieuse. Deux conclusions s’imposent. Quelle que soit l’importance que la civilisation médiévale a attribuée au comput, il reste que : 1 / les Pâques sont porteuses de significations irréductibles aux techniques chronométriques qui inscrivent cette fête dans le déroulement de l’année ; 2 / ces techniques ont toutefois marqué profondément les curiosités intellectuelles des Latins et les ont préparé à accueillir avec ferveur les zīj et la numération de position.The article studies the birth and development of the Christian ecclesiastical calendar, i.e. the computus, from the first witnesses to the yearly celebration of the resurrection of Jesus to the translations of arabic astronomical tables in the 12th century. It focuses on the procedures which resulted in determinig the dates of Easter and their being put into tabular form. These analyses were undertaken from two perspectives. One was scientific, relying on the astronomical data preserved by Ptolemy and on the contribution of the Greek mathematical

  4. French regulations in the nuclear field and standards related to nuclear pressure equipment; Reglementation francaise dans le domaine nucleaire et normes relatives aux equipements sous pression nucleaires

    Energy Technology Data Exchange (ETDEWEB)

    Mourlon, S.; Limousin, S.; Van Hoecke, J.C. [Autorite de surete nucleaire 6, place du Colonel Bourgoin 75012 Paris (France)

    2007-07-01

    French regulations on nuclear pressure equipment have been updated with the December 12, 2005 Order related to Nuclear Pressure Equipment, so-called 'ESPN Order'. This Order is at the junction of regulations covering safety on the one hand and pressure equipment on the other hand. As regards manufacturing, the ESPN Order extends to nuclear pressure equipment the approach and essential requirements of the European Pressure Equipment Directive (PED - transposed in France by the December 13, 1999 Decree) while adding specific nuclear and radiation safety requirements. For in-service inspection, it sets additional provisions to those of the December 13, 1999 Decree so that the nuclear and radiation safety requirements applying in nuclear facilities are also taken into account for those equipment. The specific case of PWR main primary and secondary systems is covered by the November 10, 1999 Order. The ESPN Order leaves a major part to industrial codes and standards. Its publication makes it necessary to check that the codes used for nuclear pressure equipment comply with the new requirements and may induce modifications of the codes. Furthermore, as the market for operators of nuclear facilities and manufacturers of mechanical equipment is becoming global, these evolutions should be considered in a worldwide context. Last, the Nuclear Transparency and Security Act of June 13, 2006 - which created the Nuclear safety authority (ASN) with competence over nuclear and radiation safety, covering specifically nuclear pressure equipment - will induce further amendments of regulations. (authors) [French] La reglementation francaise en matiere d equipements sous pression nucleaires a ete refondee avec la parution de l arrete du 12 decembre 2005 relatif aux equipements sous pression nucleaires, dit 'arrete ESPN'. Ce texte se situe a l intersection des reglementations en matiere de surete, d une part, et d equipements sous pression, d autre part. En matiere de

  5. Measures of lifetime detriment from radiation exposures: Principles and methods

    International Nuclear Information System (INIS)

    Darby, Sarah; Fagnani, Francis; Hubert, Philippe; Schneider, Thierry; Thomas, Duncan; Vaeth, Michael; Weiss, Ken

    1990-06-01

    This report presents the work initiated at the 'Workshop on the comparison of methods for deriving life long risk indices for the effects of ionizing radiations', organized by CEPN in Fontenay-aux-Roses (France), on August 7-11, 1989. It has been written in collaboration by participants during the following years

  6. Villes côtières en danger aux Philippines : investir dans la résilience ...

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

    Les villes côtières des Philippines sont très vulnérables aux effets des changements climatiques et aux catastrophes qui en découlent. Un examen des plans et des programmes de gestion des catastrophes en vigueur aux Philippines montre que la plupart d'entre eux ne s'appuient pas sur une méthode d'appréciation ...

  7. Accorder l'accès aux données économiques pour prévenir les ...

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

    Ce projet permettra aux chercheurs, aux responsables des politiques et aux défenseurs de la santé publique de prendre davantage connaissance des données économiques et stratégiques susceptibles de fonder des politiques de lutte contre le tabac et l'alcool en Afrique subsaharienne, et de jouir d'un meilleur accès à ...

  8. The accidental exposure to ionizing radiations; L'exposition accidentelle aux rayonnements ionisants

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    This article is divided in three parts, the first one gives the radioactivity sources, the doses and the effects, the second part is devoted to the medical exposures, the third part concerns the accidents and the biological effects of an irradiation the different syndromes ( the acute whole-body irradiation syndrome, the localized irradiation syndrome, the inflammatory syndrome, hematopoietic syndrome,neuro-vascular syndrome) are detailed. (N.C.)

  9. Des usines à la campagne aux villes industrielles

    Directory of Open Access Journals (Sweden)

    Laure Bonnaud

    2005-06-01

    Full Text Available L’objet de cet article est de retracer sociologiquement l’histoire du droit des installations classées ou plutôt de la partie de ce droit qui concerne l’urbanisation autour des établissements dangereux et qui entend ainsi encadrer les relations entre la ville et l’industrie. Cette perspective permet d’envisager deux aspects complémentaires de cette question : d’une part, on examine le droit comme une façon de représenter un problème et notamment comment la place de la question urbaine y a été pensée et définie ; d’autre part, on s’intéresse aux règles juridiques comme des outils, des ressources de catégories, de concepts qui définissent des cadres pour l’action publique. Ainsi, l'histoire du droit des installations classées contribue à mettre en lumière la façon dont la gestion de la proximité ville/industrie articule en permanence (mais selon des modalités qui varient au fil du temps les dimensions sociales, économiques et environnementales qui permettent aujourd'hui d'appréhender et de définir le développement durable.The main aim of this paper is to relate the history of a part of the environmental French law, the one which govern the urban development in the vicinity of the dangerous chemical plants. From a sociological point of view, two aspects of this issue may be simultaneously analysed. In one hand, we examine the law as a way to represent the problem of cohabitation between urban area and industry: how this question has been successively thought out and defined? On the other hand, we take an interest in the juridical rules considered as tools, resources and concepts for public management. According to this approach, the history of this part of French law highlight how urban planning and risk management permanently link the social, economical and environmental dimensions of sustainability. But it shows also that those three factors play a part that vary from time to time.

  10. Ti1-xAux Alloys: Hard Biocompatible Metals and Their Possible Applications

    Science.gov (United States)

    Svanidze, Eteri; Besara, Tiglet; Ozaydin, M. Fevzi; Xin, Yan; Han, Ke; Liang, Hong; Siegrist, Theo; Morosan, Emilia

    2015-03-01

    The search for new hard materials is often challenging from both theoretical and experimental points of view. Furthermore, using materials for biomedical applications calls for alloys with high biocompatibility which are even more sparse. The Ti1-xAux (0 . 22 metallicity, high biocompatibility, low wear, reduced friction, potentially high radio opacity, as well as osseointegration. All these properties render the Ti1-xAux alloys particularly useful for orthopedic, dental, and prosthetic applications, where they could be used as both permanent and temporary components. Additionally, the ability of Ti1-xAux alloys to adhere to ceramic parts could reduce the weight and cost of these components. The work at Rice was supported by NSF DMR 0847681 (E.M. and E.S.).

  11. Formation en TIC destinée aux personnes handicapées en ...

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

    Formation en TIC destinée aux personnes handicapées en Amérique latine. En Amérique latine et dans les Caraïbes, les personnes handicapées représentent environ 10 % de la population. La population de cette région affiche des taux de pauvreté et de chômage élevés; assurer des moyens de subsistance décents aux ...

  12. Genome-Wide Analysis and Characterization of Aux/IAA Family Genes in Brassica rapa.

    Science.gov (United States)

    Paul, Parameswari; Dhandapani, Vignesh; Rameneni, Jana Jeevan; Li, Xiaonan; Sivanandhan, Ganesan; Choi, Su Ryun; Pang, Wenxing; Im, Subin; Lim, Yong Pyo

    2016-01-01

    Auxins are the key players in plant growth development involving leaf formation, phototropism, root, fruit and embryo development. Auxin/Indole-3-Acetic Acid (Aux/IAA) are early auxin response genes noted as transcriptional repressors in plant auxin signaling. However, many studies focus on Aux/ARF gene families and much less is known about the Aux/IAA gene family in Brassica rapa (B. rapa). Here we performed a comprehensive genome-wide analysis and identified 55 Aux/IAA genes in B. rapa using four conserved motifs of Aux/IAA family (PF02309). Chromosomal mapping of the B. rapa Aux/IAA (BrIAA) genes facilitated understanding cluster rearrangement of the crucifer building blocks in the genome. Phylogenetic analysis of BrIAA with Arabidopsis thaliana, Oryza sativa and Zea mays identified 51 sister pairs including 15 same species (BrIAA-BrIAA) and 36 cross species (BrIAA-AtIAA) IAA genes. Among the 55 BrIAA genes, expression of 43 and 45 genes were verified using Genebank B. rapa ESTs and in home developed microarray data from mature leaves of Chiifu and RcBr lines. Despite their huge morphological difference, tissue specific expression analysis of BrIAA genes between the parental lines Chiifu and RcBr showed that the genes followed a similar pattern of expression during leaf development and a different pattern during bud, flower and siliqua development stages. The response of the BrIAA genes to abiotic and auxin stress at different time intervals revealed their involvement in stress response. Single Nucleotide Polymorphisms between IAA genes of reference genome Chiifu and RcBr were focused and identified. Our study examines the scope of conservation and divergence of Aux/IAA genes and their structures in B. rapa. Analyzing the expression and structural variation between two parental lines will significantly contribute to functional genomics of Brassica crops and we belive our study would provide a foundation in understanding the Aux/IAA genes in B. rapa.

  13. Genome-Wide Analysis and Characterization of Aux/IAA Family Genes in Brassica rapa.

    Directory of Open Access Journals (Sweden)

    Parameswari Paul

    Full Text Available Auxins are the key players in plant growth development involving leaf formation, phototropism, root, fruit and embryo development. Auxin/Indole-3-Acetic Acid (Aux/IAA are early auxin response genes noted as transcriptional repressors in plant auxin signaling. However, many studies focus on Aux/ARF gene families and much less is known about the Aux/IAA gene family in Brassica rapa (B. rapa. Here we performed a comprehensive genome-wide analysis and identified 55 Aux/IAA genes in B. rapa using four conserved motifs of Aux/IAA family (PF02309. Chromosomal mapping of the B. rapa Aux/IAA (BrIAA genes facilitated understanding cluster rearrangement of the crucifer building blocks in the genome. Phylogenetic analysis of BrIAA with Arabidopsis thaliana, Oryza sativa and Zea mays identified 51 sister pairs including 15 same species (BrIAA-BrIAA and 36 cross species (BrIAA-AtIAA IAA genes. Among the 55 BrIAA genes, expression of 43 and 45 genes were verified using Genebank B. rapa ESTs and in home developed microarray data from mature leaves of Chiifu and RcBr lines. Despite their huge morphological difference, tissue specific expression analysis of BrIAA genes between the parental lines Chiifu and RcBr showed that the genes followed a similar pattern of expression during leaf development and a different pattern during bud, flower and siliqua development stages. The response of the BrIAA genes to abiotic and auxin stress at different time intervals revealed their involvement in stress response. Single Nucleotide Polymorphisms between IAA genes of reference genome Chiifu and RcBr were focused and identified. Our study examines the scope of conservation and divergence of Aux/IAA genes and their structures in B. rapa. Analyzing the expression and structural variation between two parental lines will significantly contribute to functional genomics of Brassica crops and we belive our study would provide a foundation in understanding the Aux/IAA genes in B. rapa.

  14. Intégration des sexospécificités et de l'équité aux recherches et aux ...

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

    Plus particulièrement, les extrants comprendront un cadre permettant de comprendre la violence à l'endroit des femmes, l'adaptation du modèle des " trois délais " en matière de mortalité maternelle aux milieux pauvres et fortement sexistes ainsi qu'une procédure de gestion des complications et des risques liés à la ...

  15. Amélioration de la résilience aux répercussions des changements ...

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

    Amélioration de la résilience aux répercussions des changements climatiques sur les ressources en eau dans le corridor du bétail en Ouganda ... Il est particulièrement vulnérable aux changements climatiques. Ce projet fournira ... Water Resource Management and the Changing Climate in Angola's Coastal Settlements.

  16. Adaptation aux répercussions de l'élévation du niveau de la mer ...

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

    , la pollution, l'utilisation intensive des terres, la croissance démographique et la dégradation des écosystèmes. Elles sont par ailleurs exposées aux répercussions de la hausse du niveau de la mer et notamment aux inondations. Réduire la ...

  17. Photoactivated CRY1 and phyB Interact Directly with AUX/IAA Proteins to Inhibit Auxin Signaling in Arabidopsis.

    Science.gov (United States)

    Xu, Feng; He, Shengbo; Zhang, Jingyi; Mao, Zhilei; Wang, Wenxiu; Li, Ting; Hua, Jie; Du, Shasha; Xu, Pengbo; Li, Ling; Lian, Hongli; Yang, Hong-Quan

    2017-12-19

    Light is a key environmental cue that inhibits hypocotyl cell elongation through the blue and red/far-red light photoreceptors cryptochrome- and phytochrome-mediated pathways in Arabidopsis. In contrast, as a pivotal endogenous phytohormone auxin promotes hypocotyl elongation through the auxin receptors TIR1/AFBs-mediated degradation of AUX/IAA proteins (AUX/IAAs). However, the molecular mechanisms underlying the antagonistic interaction of light and auxin signaling remain unclear. Here, we report that light inhibits auxin signaling through stabilization of AUX/IAAs by blue and red light-dependent interactions of cryptochrome 1 (CRY1) and phytochrome B with AUX/IAAs, respectively. Blue light-triggered interactions of CRY1 with AUX/IAAs inhibit the associations of TIR1 with AUX/IAAs, leading to the repression of auxin-induced degradation of these proteins. Our results indicate that photoreceptors share AUX/IAAs with auxin receptors as the same direct downstream signaling components. We propose that antagonistic regulation of AUX/IAA protein stability by photoreceptors and auxin receptors allows plants to balance light and auxin signals to optimize their growth. Copyright © 2017 The Author. Published by Elsevier Inc. All rights reserved.

  18. Evolution Analysis of the Aux/IAA Gene Family in Plants Shows Dual Origins and Variable Nuclear Localization Signals

    Science.gov (United States)

    Wu, Wentao; Liu, Yaxue; Wang, Yuqian; Li, Huimin; Liu, Jiaxi; Tan, Jiaxin; He, Jiadai; Bai, Jingwen

    2017-01-01

    The plant hormone auxin plays pivotal roles in many aspects of plant growth and development. The auxin/indole-3-acetic acid (Aux/IAA) gene family encodes short-lived nuclear proteins acting on auxin perception and signaling, but the evolutionary history of this gene family remains to be elucidated. In this study, the Aux/IAA gene family in 17 plant species covering all major lineages of plants is identified and analyzed by using multiple bioinformatics methods. A total of 434 Aux/IAA genes was found among these plant species, and the gene copy number ranges from three (Physcomitrella patens) to 63 (Glycine max). The phylogenetic analysis shows that the canonical Aux/IAA proteins can be generally divided into five major clades, and the origin of Aux/IAA proteins could be traced back to the common ancestor of land plants and green algae. Many truncated Aux/IAA proteins were found, and some of these truncated Aux/IAA proteins may be generated from the C-terminal truncation of auxin response factor (ARF) proteins. Our results indicate that tandem and segmental duplications play dominant roles for the expansion of the Aux/IAA gene family mainly under purifying selection. The putative nuclear localization signals (NLSs) in Aux/IAA proteins are conservative, and two kinds of new primordial bipartite NLSs in P. patens and Selaginella moellendorffii were discovered. Our findings not only give insights into the origin and expansion of the Aux/IAA gene family, but also provide a basis for understanding their functions during the course of evolution. PMID:28991190

  19. Auxin sensitivities of all Arabidopsis Aux/IAAs for degradation in the presence of every TIR1/AFB.

    Science.gov (United States)

    Shimizu-Mitao, Yasushi; Kakimoto, Tatsuo

    2014-08-01

    Auxin plays a key role in regulation of almost all processes of plant growth and development. Different physiological processes are regulated by different ranges of auxin concentrations; however, the underlying mechanisms creating these differences are largely unknown. The first step of auxin signaling is auxin-dependent interaction of an auxin receptor with transcriptional co-repressors (Aux/IAA), which leads to Aux/IAA degradation. Arabidopsis has six homologous auxin receptors (TIR1 and five AFBs), 29 Aux/IAA proteins and two types of active auxins, IAA and phenylacetic acid (PAA). Therefore, a large number of possible combinations between these three factors may contribute to the creation of complex auxin responses. Using a yeast heterologous reconstitution system, we investigated auxin-dependent degradation of all Arabidopsis Aux/IAAs in combination with every TIR or AFB receptor component. We found that TIR1 and AFB2 were effective in mediating Aux/IAA degradation. We confirmed that the Aux/IAA domain II, which binds TIR1, is essential for degradation. IAA and other natural auxins, 4-chloroindole-3-acetic acid (4-Cl-IAA) and PAA, induced Aux/IAA degradation; and IAA and 4-Cl-IAA had higher activity than PAA. Effective auxin concentrations for Aux/IAA degradation depended on both Aux/IAAs and TIR1 or AFB2 receptors, which is consistent with the Aux/IAA-TIR1/AFB co-receptor concept. © The Author 2014. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For permissions, please email: journals.permissions@oup.com.

  20. Evolution Analysis of the Aux/IAA Gene Family in Plants Shows Dual Origins and Variable Nuclear Localization Signals

    Directory of Open Access Journals (Sweden)

    Wentao Wu

    2017-10-01

    Full Text Available The plant hormone auxin plays pivotal roles in many aspects of plant growth and development. The auxin/indole-3-acetic acid (Aux/IAA gene family encodes short-lived nuclear proteins acting on auxin perception and signaling, but the evolutionary history of this gene family remains to be elucidated. In this study, the Aux/IAA gene family in 17 plant species covering all major lineages of plants is identified and analyzed by using multiple bioinformatics methods. A total of 434 Aux/IAA genes was found among these plant species, and the gene copy number ranges from three (Physcomitrella patens to 63 (Glycine max. The phylogenetic analysis shows that the canonical Aux/IAA proteins can be generally divided into five major clades, and the origin of Aux/IAA proteins could be traced back to the common ancestor of land plants and green algae. Many truncated Aux/IAA proteins were found, and some of these truncated Aux/IAA proteins may be generated from the C-terminal truncation of auxin response factor (ARF proteins. Our results indicate that tandem and segmental duplications play dominant roles for the expansion of the Aux/IAA gene family mainly under purifying selection. The putative nuclear localization signals (NLSs in Aux/IAA proteins are conservative, and two kinds of new primordial bipartite NLSs in P. patens and Selaginella moellendorffii were discovered. Our findings not only give insights into the origin and expansion of the Aux/IAA gene family, but also provide a basis for understanding their functions during the course of evolution.

  1. Solutions d'adaptation liées aux changements climatiques et à l'eau ...

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

    Ce projet vise à faire connaître les solutions d'adaptation concrètes aux changements climatiques découlant de recherches financées par le CRDI. ... Le projet sera mis en oeuvre dans le cadre d'un partenariat de recherche entre Local Governments for Sustainability Management (ICLEI) et l'Université de Waterloo.

  2. Vulnérabilité et adaptation face aux changements climatiques et au ...

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

    Vulnérabilité et adaptation face aux changements climatiques et au VIH/sida en Afrique du Sud. Les changements climatiques et le VIH/sida sont largement reconnus comme des facteurs aggravants de la pauvreté chronique qui sévit en Afrique subsaharienne. Dans le cadre de ce projet, on cherchera à mieux comprendre ...

  3. Création d'un contexte concurrentiel et propice aux entreprises en ...

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

    Création d'un contexte concurrentiel et propice aux entreprises en Cisjordanie et à Gaza. Certains facteurs - la durée indéterminée de l'occupation des ... governance in Palestine [Arabic language]. 45572. Papers. Impact of the draft company law on the performance of the private sector in Palestine [Arabic language].

  4. L'évaluation comme partie intégrante du processus d'adaptation aux ...

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

    nbeaulieu

    Le programme Adaptation aux changements climatiques en Afrique (ACCA), une initiative conjointe du Département du Royaume Uni pour le développement international (DfID) et du. Centre de recherches pour le développement international (CRDI), met un accent important sur l'évaluation, et en particulier sur les ...

  5. Monitoring the performance of Aux. Feedwater Pump using Smart Sensing Model

    International Nuclear Information System (INIS)

    No, Young Gyu; Seong, Poong Hyun

    2015-01-01

    Many artificial intelligence (AI) techniques equipped with learning systems have recently been proposed to monitor sensors and components in NPPs. Therefore, the objective of this study is the development of an integrity evaluation method for safety critical components such as Aux. feedwater pump, high pressure safety injection (HPSI) pump, etc. using smart sensing models based on AI techniques. In this work, the smart sensing model is developed at first to predict the performance of Aux. feedwater pump by estimating flowrate using group method of data handing (GMDH) method. If the performance prediction is achieved by this feasibility study, the smart sensing model will be applied to development of the integrity evaluation method for safety critical components. Also, the proposed algorithm for the performance prediction is verified by comparison with the simulation data of the MARS code for station blackout (SBO) events. In this study, the smart sensing model for the prediction performance of Aux. feedwater pump has been developed. In order to develop the smart sensing model, the GMDH algorithm is employed. The GMDH algorithm is the way to find a function that can well express a dependent variable from independent variables. This method uses a data structure similar to that of multiple regression models. The proposed GMDH model can accurately predict the performance of Aux

  6. Neuf nouvelles subventions permettront d'améliorer l'accès aux ...

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

    6 avr. 2017 ... ... nouvelles subventions permettront à neuf de ces équipes d'appliquer à grande échelle des interventions prometteuses et à combler le besoin d'information sur la planification familiale, de soutien aux mères adolescentes et de services et de renseignements en matière de santé sexuelle et reproductive.

  7. Prévalence et susceptibilité aux antibiotiques des souches de ...

    African Journals Online (AJOL)

    Prévalence et susceptibilité aux antibiotiques des souches de Salmonella spp. non typhiques isolées de la viande de poulets au Tchad. Hamadou Abba, Marius K. Somda, Ban-bo Bebanto Antipas, Nicolas Barro, Alfred S. Traore ...

  8. Les gagnants de la bourse du CRDI aux chercheurs candidats au ...

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

    Les gagnants de la bourse du CRDI aux chercheurs candidats au doctorat de 2017. 30 novembre 2017. Cérémonie de certificat pour un programme de formation en entreprenariat en Ouganda, mai 2017. Michelle Savard. Michelle Savard, une récipiendaire de 2016, remet un certificat pour l'achèvement d'un programme ...

  9. Réduire les risques alimentaires associés aux maladies non ...

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

    Il permettra de générer de nouvelles connaissances sur le lien de causalité entre l'évolution des systèmes d'alimentation, pratiques alimentaires et tendances relatives aux maladies et les facteurs démographiques, épidémiologiques, socioculturels, économiques et comportementaux connexes. Les travaux de recherche ...

  10. Offrir un choix aux agriculteurs pauvres: Harsha de Silva (Sri Lanka ...

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

    ans de nombreux pays en développement, les téléphones mobiles permettent aux pauvres de profiter des avantages des technologies de l'information et de la communication (TIC). Des travaux de recherche appuyés par le CRDI et dirigés par Learning Initiatives on Reforms for Network Economies (LIRNEasia), ...

  11. De la recherche aux politiques - Établissement de liens entre l ...

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

    La recherche sur les changements climatiques et leurs effets sur les populations vulnérables est assez avancée en Afrique australe. Toutefois, il y a peu de transfert des connaissances des scientifiques aux responsables des politiques. Ce projet vise à faciliter la traduction des résultats de la recherche en politiques de ...

  12. Le marche aux fetiches (lantassime) d'Akodessewa a Lome (Togo ...

    African Journals Online (AJOL)

    observation et les enquêtes par questionnaires a permis de montrer que le marché aux fétiches occupe des fonctions commerciale, sociale, cultuelle et mystique, économique et touristique. Il couvre une superficie de 1200 m² avec 15 stands sous ...

  13. Adapter les pratiques agricoles aux différentes conditions pédoclimatiques

    NARCIS (Netherlands)

    Turpin, N.; Perret, E.; Berge, ten H.F.M.; Hose, D' T.; Evert, van F.K.

    2016-01-01

    Les pratiques agricoles qui réduisent la quantité de carbone dans le sol peuvent perturber son activité microbienne, modifier sa structure, et sa capacité à fournir eau et nutriments aux cultures. Elles peuvent aussi limiter la capacité des sols agricoles à lutter contre le changement climatique. Le

  14. Moyens que prennent les collectivités pour faire face aux souvenirs ...

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

    Des années plus tard, les habitants de ces territoires sont toujours en proie aux traumatismes du passé. Cette recherche comparative analyse le processus de réparation en cours en Aceh et au Timor-Leste. Elle veut permettre de mieux comprendre comment les collectivités et les victimes individuelles de violations ...

  15. Isolation and characterization of an Aux/IAA gene ( LaIAA2 ) from Larix

    African Journals Online (AJOL)

    indole-3-acetic acid (Aux/IAA) transcriptional factors are key regulators of auxin responses in plants. To investigate the effects of auxin on gene expression during the rooting process of Larix cuttings, a subtractive cDNA library was constructed and ...

  16. Amélioration de la durée de conservation des bananes plantain aux ...

    African Journals Online (AJOL)

    Amélioration de la durée de conservation des bananes plantain aux températures ambiantes. A Lepengue, I Mouaragadja, E Dick, B Mbatchi, S Ake. Abstract. La banane plantain est le premier aliment de base au Gabon. Malheureusement 30 à 40% de sa production sont perdues, par manque de techniques de ...

  17. Peptidyl-prolyl isomerization targets rice Aux/IAAs for proteasomal degradation during auxin signalling.

    Science.gov (United States)

    Jing, Hongwei; Yang, Xiaolu; Zhang, Jian; Liu, Xuehui; Zheng, Huakun; Dong, Guojun; Nian, Jinqiang; Feng, Jian; Xia, Bin; Qian, Qian; Li, Jiayang; Zuo, Jianru

    2015-06-22

    In plants, auxin signalling is initiated by the auxin-promoted interaction between the auxin receptor TIR1, an E3 ubiquitin ligase, and the Aux/IAA transcriptional repressors, which are subsequently degraded by the proteasome. Gain-of-function mutations in the highly conserved domain II of Aux/IAAs abolish the TIR1-Aux/IAA interaction and thus cause an auxin-resistant phenotype. Here we show that peptidyl-prolyl isomerization of rice OsIAA11 catalysed by LATERAL ROOTLESS2 (LRT2), a cyclophilin-type peptidyl-prolyl cis/trans isomerase, directly regulates the stability of OsIAA11. NMR spectroscopy reveals that LRT2 efficiently catalyses the cis/trans isomerization of OsIAA11. The lrt2 mutation reduces OsTIR1-OsIAA11 interaction and consequently causes the accumulation of a higher level of OsIAA11 protein. Moreover, knockdown of the OsIAA11 expression partially rescues the lrt2 mutant phenotype in lateral root development. Together, these results illustrate cyclophilin-catalysed peptidyl-prolyl isomerization promotes Aux/IAA degradation, as a mechanism regulating auxin signalling.

  18. Réduire les risques et les pertes attribuables aux changements ...

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

    examiner comment des villes comme Le Cap peuvent le mieux mettre en application des processus décisionnels efficaces dans le contexte de l'adaptation aux changements climatiques et d'un niveau élevé d'informalité.

  19. Etude comparative de la flore aux abords des cours d'eau dans les ...

    African Journals Online (AJOL)

    Etude comparative de la flore aux abords des cours d'eau dans les zones hypo et hyper endémiques d'ulcère de Buruli en Côte d'Ivoire. C. Cisse Boni, E. Ehouman, D. Soro, M.W. Kone, A. Bakayoko, F. Dembele, K. Bauthire, M Dosso ...

  20. Mise en place d'un réseau d'adaptation aux changements ...

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

    Ce projet a pour objectif de concevoir un mécanisme de gestion des risques accrus liés aux changements climatiques en appliquant le principe reconnu des ... Adaptation to Climate Change: Stakeholder engagement and understanding impacts - International Council for Local Environment Initiatives (ICLEI) (Section 21).

  1. Isolation and characterization of an Aux/IAA gene (LaIAA2) from Larix

    African Journals Online (AJOL)

    微软用户

    superfamily have been cloned from several species, includeing Arabidopsis thaliana, pea, Pisum sativum L., soybean, Glycine max (L.) Merrill, mung bean, Vigna radiata (L.) R. Wilcz, tobacco, cucumber, loblolly pine and tomato (Goldfarb et al., 2003; Zhang et al., 2007). The precise biochemical functions of Aux/IAA gene.

  2. Proposition of declaration tending to create a commission of inquiry relative to the impact in nourishment and on health of foodstuff treated by irradiation; Proposition de resolution tendant a creer une commission d'enquete relative a l'impact dans l'alimentation et sur la sante des denrees traitees par radiations ionisantes

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    In application of articles 140 and following of the regulation, is created a commission of inquiry with thirty members relative to the impact in foodstuff and on health of irradiated food. It should examines the respect of the regulation concerning the labelling, the production and imports; it should determine the real place of this food in the French diet and the impact on this diet that could imply an opening of the market to the food imported from third country to european Union; it should evaluate the risk for human and animal health of their consumption. (N.C.)

  3. État et perspectives de lutte contre Sitotroga cerealella (Olivier, 1789 ...

    African Journals Online (AJOL)

    Plusieurs chercheurs se sont intéressés, dans le cadre des luttes physiques, aux irradiations ionisantes provenant de source de rayons gamma du cobalt 60 et des variétés de céréales résistantes dans le cas du riz, du blé ou de maïs. Aussi, des parasites, pathogènes ou prédateurs (Trichogramma spp, Blattisocius tarsalis, ...

  4. Genome-wide analysis of Aux/IAA and ARF gene families in Populus trichocarpa

    Energy Technology Data Exchange (ETDEWEB)

    Kalluri, Udaya C [ORNL; DiFazio, Stephen P [West Virginia University; Brunner, A. [Virginia Polytechnic Institute and State University (Virginia Tech); Tuskan, Gerald A [ORNL

    2007-01-01

    Auxin/Indole-3-Acetic Acid (Aux/IAA) and Auxin Response Factor (ARF) transcription factors are key regulators of auxin responses in plants. A total of 35 Aux/IAA and 39 ARF genes were identified in the Populus genome. Comparative phylogenetic analysis revealed that the subgroups PoptrARF2, 6, 9 and 16 and PoptrIAA3, 16, 27 and 29 have differentially expanded in Populus relative to Arabidopsis. Activator ARFs were found to be two fold-overrepresented in the Populus genome. PoptrIAA and PoptrARF gene families appear to have expanded due to high segmental and low tandem duplication events. Furthermore, expression studies showed that genes in the expanded PoptrIAA3 subgroup display differential expression. The gene-family analysis reported here will be useful in conducting future functional genomics studies to understand how the molecular roles of these large gene families translate into a diversity of biologically meaningful auxin effects.

  5. Le Carnaval de Schignano : un dernier salut aux émigrants

    Directory of Open Access Journals (Sweden)

    Cristina Del Biaggio

    2011-05-01

    Full Text Available Pour arriver à Schignano, il faut passer par una cürva al giazz e una cürva al suu [Un virage dans la glace et un virage au soleil], comme disent les mots en dialecte d’une récente chanson écrite par Davide Van De Sfroos, compositeur-interprète de la région. C’est dans ce petit hameau de la Vallée d’Intelvi, au-dessus du Lac de Côme, que, tous les ans, le carnaval anime le village. Une fête populaire spontanée, sans règles écrites, ni lois, qui survit grâce aux habitants qui l’animent, aux ar...

  6. L’orthographe : des systèmes aux usages

    OpenAIRE

    Fayol, Michel; Jaffré, Jean-Pierre

    2016-01-01

    Ce texte propose un éclairage à la fois linguistique et psycholinguistique sur l’orthographe. Au-delà de la spécificité inhérente, par définition, aux deux domaines, il illustre la complémentarité épistémologique qui s’est développée entre eux au cours des dernières décennies. La psycholinguistique a très souvent fait appel aux descriptions linguistiques pour élaborer ses hypothèses de travail et, de son côté, la linguistique s’est inspirée à maintes reprises des observations psycholinguistiq...

  7. Soutien à la recherche économique et sociale aux fins de la ...

    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.

  8. Accès aux TIC et leur utilisation en enseignement supérieur en ...

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

    Les politiques dans le domaine de l'enseignement supérieur en matière de technologies de l'information et de la communication (TIC) présument qu'un accès accru aux TIC encourage leur utilisation. Une première collecte de données effectuée en 2004 et 2007 fournit une base des plus nécessaires sur laquelle fonder la ...

  9. Adaptation des politiques de pêche aux changements climatiques à ...

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

    Adaptation des politiques de pêche aux changements climatiques à l'aide des savoirs scientifiques et de connaissances endogènes (Afrique de l'Ouest). Le secteur de la pêche ressente les changements climatiques de différents manières, soit dans la composition des populations animales et végétales, dans des ...

  10. Justice sociale face aux mariages précoces en Afrique de l'Ouest ...

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

    Justice sociale face aux mariages précoces en Afrique de l'Ouest. Au Sénégal et en Côte d'Ivoire, les statistiques courantes montrent un relèvement de l'âge moyen du premier mariage des filles à plus de 18 ans. Cependant, l'évaluation des programmes de lutte contre ces phénomènes dans ces pays ont montré que ces ...

  11. Réduire les risques et les pertes attribuables aux changements ...

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

    22 août 2014 ... Entre-temps, dans les pays plus riches, comme le Japon et les États‑Unis, les bâtiments et l'infrastructure font l'objet de nouvelles conceptions visant à prévenir les conséquences des tremblements de terre. Quelle comparaison feriez‑vous entre les plans d'adaptation aux tremblements de terre et les ...

  12. Aux/IAA gene family is conserved in the gymnosperm, loblolly pine (Pinus taeda).

    Science.gov (United States)

    Goldfarb, Barry; Lanz-Garcia, Carmen; Lian, Zhigang; Whetten, Ross

    2003-12-01

    We isolated five members of the Aux/IAA gene family in loblolly pine (Pinus taeda L.). Degenerate primers complementary to conserved regions of angiosperm Aux/IAA genes were used to amplify fragments that were, in turn, used as probes to screen a cDNA library constructed from auxin-treated hypocotyls. The five unique clones, named PTIAA1-5, contain the four highly conserved domains that are characteristic of the Aux/IAA proteins. All clones contain the bipartite nuclear localization signal (NLS) between Domains I and II that is predicted in most angiosperm Aux/IAA genes, but only one, PTIAA2, contains the conserved NLS in Domain IV. The five invariant residues in Domain II that have been found to constitute part of a protein destabilization element in Arabidopsis thaliana (L.) Heynh. are conserved in all the PTIAAs. A postulated phosphorylation site located between Domains I and II and proximal to the conserved bipartite NLS was conserved in 20 out of 36 genes in this analysis, including the pine genes. Transcripts of all five PTIAAs accumulated specifically in the hypocotyls in response to exogenous auxin treatment and were induced by all auxins tested. Transcript abundance above basal levels in response to 1-naphthaleneacetic acid treatment was first detected after 10 min (PTIAA3) to 3 h (PTIAA2) in the different genes and remained above basal levels throughout 7 days. Induction of PTIAA2 was inhibited by the protein synthesis inhibitor cycloheximide, indicating that PTIAA2 is a secondary response gene. Phylogenetic analysis showed that all five pine genes clustered within a single class (Class I) of the dendrogram. Clone PTIAA2 has a sequence that is relatively distinct from the other four and is the most closely related to the angiosperm genes of Class I. Class I contains both primary and secondary auxin response genes, suggesting that it is the original lineage and that other gene classes have evolved subsequent to the angiosperm/gymnosperm divergence.

  13. Communiquer les risques associés au climat aux collectivités ...

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

    13 mai 2015 ... Le Vietnam est particulièrement vulnérable aux changements climatiques et à la hausse du niveau des océans qui en découle, puisqu'une partie importante de sa population vit dans les basses terres des deltas et le long de la côte, des zones à haut risque. En 2011, d'importantes inondations ont ...

  14. ÉTUDE DE CAS — Philippines : Aux Philippines, les progrès ...

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

    17 déc. 2010 ... Aux Philippines, le système de suivi communautaire de la pauvreté, d'abord projet pilote, s'est étendu, en 14 ans, à l'échelle nationale, appuyé par tous les ordres de gouvernement. Les données orientent la planification et le ciblage des programmes, les affectations budgétaires, ainsi que le suivi des ...

  15. Adaptation aux effets qu'ont les changements climatiques sur les ...

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

    Le projet a pour objectif général d'appuyer la capacité d'adaptation aux effets que les changements climatiques ont sur les ressources en eau au Canada, ... de transfert et d'application des connaissances ayant trait à la salubrité du climat et à la gestion des risques que les changements climatiques présentent pour la ...

  16. Point saillant : Des scientifiques répondent aux défis du changement ...

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

    Plus de 2 200 scientifiques et chercheurs de premier plan ont participé à la conférence scientifique Notre avenir commun sous le changement climatique qui s'est déroulée à Paris, en France, en juillet. La conférence s'est attardée aux grandes questions liées au climat en amont de la 21e Conférence des parties de la ...

  17. Suspicion de la résistance aux benzimidazoles chez les strongles ...

    African Journals Online (AJOL)

    Suspicion de la résistance aux benzimidazoles chez les strongles gastrointestinaux du caprin à Lubumbashi, R.D. Congo. EV Okombe, SEW Pongombo. Abstract. Cent vingt-quatre caprins sélectionnés dans deux fermes de la région de Lubumbashi en R.D. Congo, ont été examinés en utilisant le test de réduction de ...

  18. Vulnérabilité et adaptation aux changements climatiques des ...

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

    21 avr. 2016 ... Madagascar, la quatrième plus grande île au monde, héberge une multitude de formes de vie qu'on ne trouve nulle part ailleurs sur la planète. Dans la plupart des cas, cette biodiversité est extrêmement vulnérable aux changements climatiques, tout comme l'agriculture pluviale, la pêche et la foresterie, ...

  19. Solutions de remplacement à la culture du tabac et aux activités ...

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

    Solutions de remplacement à la culture du tabac et aux activités connexes (Inde) ... L'Inde fait toutefois partie du groupe de travail sur les activités de remplacement de la culture du tabac économiquement viables de l'Organisation mondiale de la santé (OMS) et dispose de ... India, Central Asia, Far East Asia, South Asia ...

  20. Adaptation à la variabilité du climat et aux changements climatiques ...

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

    25 avr. 2014 ... En même temps, selon les prévisions, les changements climatiques entraîneront une hausse des températures et une baisse des précipitations. Étant donné le rôle de la région dans l'économie chilienne, une stratégie d'adaptation aux changements climatiques s'impose de toute urgence. Wine production ...

  1. La vulnérabilité aux changements climatiques, une expérience ...

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

    21 avr. 2011 ... Madagascar, la quatrième plus grande île au monde, héberge une multitude de formes de vie qu'on ne trouve nulle part ailleurs sur la planète. Dans la plupart des cas, cette biodiversité est extrêmement vulnérable aux changements climatiques, tout comme l'agriculture pluviale, la pêche et la foresterie, ...

  2. Amélioration de l'adaptation aux changements climatiques des ...

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

    Amélioration de l'adaptation aux changements climatiques des pasteurs du nord du Kenya. Près de 13 % des 30 millions d'habitants du Kenya sont des pasteurs dont les troupeaux vivent dans des terres arides et semi-arides qui composent environ 75 % de la masse terrestre du pays. Ces régions sont sujettes à une ...

  3. Adaptation aux changements climatiques dans la vallée de Mantaro ...

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

    Les inondations dues aux phénomènes météorologiques extrêmes causent de plus en plus de ravages le long du río de la Plata en Argentine et en Uruguay. Des chercheurs subventionnés par le CRDI ont constaté que le changement des conditions météorologiques et l'intensité des phénomènes météorologique.

  4. Accès des femmes aux terres : appel à propositions | IDRC ...

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

    Accès des femmes aux terres : appel à propositions. Ce projet est né du besoin de mieux comprendre, au-delà du cadre juridique, les obstacles que doivent surmonter les femmes qui veulent accéder à la propriété foncière ou à d'autres ressources de production. En 2005, le CRDI a apporté son soutien à quelques études ...

  5. 211 Vulnérabilité des troupeaux transhumants aux mutations ...

    African Journals Online (AJOL)

    ZAKARI SOUF

    L'économie locale est dominée par l'agriculture, l'élevage et la pêche qui emploient l'essentiel de la population active. Les principales productions ...... du W (Bénin), Mémoire de Diplôme d'Etudes Approfondies, FSA/UAC, (2011), 100 p. [7] - S. N. I. Djenontin, Vulnérabilité des ressources en eau face aux changements ...

  6. Moyens que prennent les collectivités pour faire face aux souvenirs ...

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

    Moyens que prennent les collectivités pour faire face aux souvenirs traumatiques - enseignements tirés d'Aceh et du Timor-Leste. La province d'Aceh et l'État maintenant indépendant du Timor-Leste (auparavant le Timor oriental) ont vécu des décennies de conflit et des violations massives des droits de la personne sous la ...

  7. Gestion de la biodiversité agricole aux fins de la nutrition, de la ...

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

    Les qualités nutritionnelles des aliments provenant des systèmes de production alimentaire de l'Afrique se dégradent, comme l'indiquent la prévalence accrue de carences en micronutriments et de maladies chroniques et la faible résistance aux maladies infectieuses. En s'appuyant sur les expériences antérieures dans ...

  8. Le CRDI aide l'Inde à s'adapter aux changements climatiques au ...

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

    23 févr. 2018 ... Plans d'action sur l'adaptation aux changements climatiques pour gérer le stress thermique dans les villes indiennes (Integrated Research and Action for Development, 1 001 800 $). Le projet vise à améliorer la gestion des risques associés au stress thermique en Inde grâce à l'élaboration de plans ...

  9. Des bananes plus nutritives et qui résistent aux maladies | CRDI ...

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

    28 oct. 2010 ... Les petits agriculteurs jouissent de meilleurs revenus et d'une sécurité alimentaire accrue grâce à des variétés de bananes à haut rendement qui résistent aux maladies. Au cours des années 1980 et 1990, avec le soutien du CRDI, la Fundación Hondureña de Investigación Agricola (FHIA) a mis au point ...

  10. Renforcement de la résilience aux changements climatiques pour ...

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

    29 sept. 2016 ... Les chercheurs de Cenicafé bénéficieront également de l'aide du personnel du Partenariat de café de Tim Hortons, un programme de soutien aux cultivateurs mis sur pied par Tim Hortons en 2005 en vue d'améliorer les activités et les conditions de vie des caféiculteurs. Le groupe travaillera dans deux ...

  11. Liste de vérification Bourse du CRDI aux chercheurs candidats au ...

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

    Vous ne pouvez présenter une demande que deux fois pour ce concours du CRDI, et ce, pour deux années consécutives. Si une bourse ne vous a pas été accordée lors de l'appel de la Bourse du CRDI aux chercheurs candidats au doctorat de mai 2016 et que vous envisagez de présenter une demande une deuxième ...

  12. Renforcement des droits fonciers communautaires et réactions aux ...

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

    De telles menaces qui planent sur les droits fonciers et environnementaux des collectivités sont un indice de tensions plus grandes au sein de l'appareil d'État et du système de justice. Dans ce ... Des droits internationaux aux pratiques locales : la réforme constitutionnelle et la participation en Amérique latine. Ce projet ...

  13. Evaluation in vitro de la sensibilité de Pythium aphanidermatum aux ...

    African Journals Online (AJOL)

    La pourriture des racines et du collet du papayer en Côte d'Ivoire sévit dans les plantations, causant des pertes énormes. Cependant, malgré les traitements fongiques, la maladie persiste. L'objectif de cette étude est de tester in vitro la sensibilité de Pythium aphanidermatum, responsable de la maladie, aux fongicides ...

  14. L'arbre des problèmes, des racines jusqu'aux ramilles | IDRC ...

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

    7 janv. 2011 ... Après avoir utilisé l'« arbre de problèmes », les Katkari ont eu recours à d'autres outils offerts par les SAS², tels que la dynamique causale et l'analyse des parties prenantes, pour déterminer s'il convenait de porter leur cause devant les autorités gouvernementales. Ces outils ont permis aux Katkari de ...

  15. Des services en santé mentale accessibles aux Kényans vivant en ...

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

    15 juil. 2013 ... Ces principes sont applicables non seulement au Kenya, mais aussi à d'autres pays à faible revenu qui souhaitent améliorer l'accès aux services en santé mentale. Cet article a été rédigé par Esmé Lanktree, agente de gestion de programme à l'IRSM, et révisé par Gyde Shepherd et Marie-Danielle Smith.

  16. Comportement expérimental aux cisaillements roulant et de voile de ...

    African Journals Online (AJOL)

    dans le sens de la longueur du panneau (L) et pour moitié dans le sens perpendiculaire ou transversal (T) en utilisant deux dispositifs ... Le sens de la découpe influe peu sur la résistance au cisaillement laquelle montre une augmentation avec .... L'objectif de ce travail est de déterminer la résistance aux cisaillements ...

  17. Offrir un choix aux agriculteurs pauvres: Harsha de Silva (Sri Lanka ...

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

    Nos travaux sont vraiment à la fine pointe, en ce sens qu'ils visent à offrir des choix aux agriculteurs, à les rendre plus autonomes grâce au téléphone mobile. Nous venons d'achever une étude exhaustive sur l'utilisation que font des TIC 10 000 personnes pauvres au Pakistan, en Inde, au Sri Lanka, au Bangladesh, ...

  18. Un partenariat pour lutter contre la résistance aux antimicrobiens ...

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

    11 avr. 2018 ... Le CRDI et le Global AMR Innovation Fund du Royaume-Uni, qui sera géré par le Department of Health and Social Care (DHSC) du Royaume-Uni, rentre dans un nouveau partenariat pour une nouvelle initiative dont l'objectif est de réduire les risques émergents que pose la résistance aux antimicrobiens ...

  19. Le Sri Lanka mieux préparé aux futurs tsunamis | IDRC ...

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

    9 nov. 2012 ... Les collectivités côtières vulnérables du Sri Lanka sont désormais mieux outillées pour survivre aux tsunamis, cyclones et autres catastrophes naturelles survenant soudainement. Ce degré accru de préparation est le fruit de travaux de recherche financés par le CRDI qui visaient à cerner les meilleurs ...

  20. Mobiliser les investissements du secteur privé dans l'adaptation aux ...

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

    Cette recherche vise à examiner divers moyens d'élargir le champ des options disponibles pour inciter le secteur privé à investir dans l'adaptation aux changements climatiques. Elle étudiera aussi diverses possibilités d'exploiter le financement privé pour appliquer à plus grande échelle les efforts d'adaptation dans les ...

  1. Financement de base du Rimisp aux fins de la recherche pour le ...

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

    Financement de base du Rimisp aux fins de la recherche pour le développement rural (Amérique latine et Caraïbes). Il est urgent que l'Amérique latine mette en place des politiques qui favorisent une dynamique rurale contribuant à la croissance économique, à l'inclusion sociale et à une saine gouvernance de ...

  2. Impact des prestations de l'agence pour la promotion et l'appui aux ...

    African Journals Online (AJOL)

    Leurs dépenses sociales ou investissements sur le capital humain (santé, éducation, alimentation, cérémonies diverses, etc.) sont donc améliorées grâce à PAPME. Sans l'accès au micro crédit et aux services financiers, les petites et micro entreprises ne pourront pas faire des investissements qui créent et soutiennent les ...

  3. Au-delà de l'accès : Donner la première place aux femmes en ...

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

    2 sept. 2017 ... Nous savons, par exemple, que si les femmes avaient accès aux mêmes ressources de production, comme les engrais, les machines et la documentation que les hommes, elles pourraient améliorer le rendement de leurs fermes de 20 à 30 pour 100. Mais combler les écarts en ce qui concerne l'accès aux ...

  4. Étude sur l'escalade de la violence faite aux femmes en Amérique ...

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

    Étude sur l'escalade de la violence faite aux femmes en Amérique centrale. 21 juin 2016. Ana Carcedo. En Amérique centrale, on assiste à une escalade de la violence faite aux femmes et du nombre de meurtres de femmes (ou femicides). Or, il y a des lacunes sur le plan du signalement. Primo, malgré les efforts déployés ...

  5. Amélioration de l'accès à la justice et aux services essentiels dans ...

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

    Plus de la moitié des résidents de Nairobi, au Kenya, occupent des établissements spontanés, ou bidonvilles, dans des conditions difficiles. Leurs logements sont inadéquats et ils ont un accès insuffisant à l'eau potable, aux services d'assainissement, aux services de santé, à l'école et à d'autres services publics essentiels ...

  6. Ne réduisez pas les programmes destinés aux femmes. Intégrez-les ...

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

    27 juil. 2017 ... Au cours des derniers mois, nous avons entendu dire que l'administration Trump a prévu de réduire le financement de plusieurs programmes s'adressant aux femmes, comme le Bureau des affaires mondiales relatives aux femmes du département d'État. Ce n'est pas le seul programme. Une évaluation ...

  7. Radiation protection

    International Nuclear Information System (INIS)

    Koelzer, W.

    1975-01-01

    Physical and radiological terms, quantities, and units. Basic principles of radiation protection (ICRP, IAEA, EURATOM, FRG). Biological effects of ionizing radiation. Objectives of practical radiation protection. (HP) [de

  8. Développement d'immunoessais associés aux électrodes sérigraphiées: des particules superparamagnétiques aux nanobodies

    OpenAIRE

    Patris, Stéphanie

    2014-01-01

    Cette thèse a pour vocation de contribuer au développement de différents immunocapteurs ampérométriques associés aux électrodes sérigraphiées (SPE). Les immunocapteurs sont des dispositifs simples associant un anticorps ou un antigène qui assurent la sélectivité à un transducteur (ici une SPE) ;ce dernier transforme la liaison anticorps/antigène en un signal mesurable (ici ampérométrique).Le travail est divisé en deux volets principaux.Le premier est consacré à la mise en œuvre de différents ...

  9. Développement d'immunoessais associés aux électrodes sérigraphies: des particules superparamagnétiques aux nanobodies

    OpenAIRE

    Patris, Stéphanie

    2014-01-01

    Cette thèse a pour vocation de contribuer au développement de différents immunocapteurs ampérométriques associés aux électrodes sérigraphiées (SPE). Les immunocapteurs sont des dispositifs simples associant un anticorps ou un antigène qui assurent la sélectivité à un transducteur (ici une SPE) ;ce dernier transforme la liaison anticorps/antigène en un signal mesurable (ici ampérométrique). Le travail est divisé en deux volets principaux. Le premier est consacré à la mise en œuvre de dif...

  10. Radiation enteritis

    Science.gov (United States)

    Radiation enteropathy; Radiation-induced small bowel injury; Post-radiation enteritis ... Radiation therapy uses high-powered x-rays, particles, or radioactive seeds to kill cancer cells. The therapy ...

  11. Radiation biology

    International Nuclear Information System (INIS)

    Neumeister, K.

    1977-01-01

    This chapter is included in a textbook which is primarily intended for medical students. The following topics are dealt with: radiation effects on molecules; chemical and biochemical radiation effects; modification of radiation effects and radiosensitivity; radiation-induced pathomorphological and pathophysiological effects in organs and organ systems; radiation syndrome; radiation effects in embryos and fetuses; genetic radiation effects; carcinogenesis and leukemogenesis after irradiation; and radiation effects after intake of radionuclides

  12. Consideration of measurement errors in the analysis of the risk related to the exposure to ionising radiation in an occupational cohort: application to the French cohort of uranium miners; Prise en compte des erreurs de mesure dans l'analyse du risque associe a l'exposition aux rayonnements ionisants dans une cohorte professionnelle: application a la cohorte francaise des mineurs d'uranium

    Energy Technology Data Exchange (ETDEWEB)

    Allodji, Rodrigue Setcheou

    2011-12-09

    In epidemiological studies, measurement errors in exposure can substantially bias the estimation of the risk associated to exposure. A broad variety of methods for measurement error correction has been developed, but they have been rarely applied in practice, probably because their ability to correct measurement error effects and their implementation are poorly understood. Another important reason is that many of the proposed correction methods require to know measurement errors characteristics (size, nature, structure and distribution). The aim of this thesis is to take into account measurement error in the analysis of risk of lung cancer death associated to radon exposure based on the French cohort of uranium miners. The mains stages were (1) to assess the characteristics (size, nature, structure and distribution) of measurement error in the French uranium miners cohort, (2) to investigate the impact of measurement error in radon exposure on the estimated excess relative risk (ERR) of lung cancer death associated to radon exposure, and (3) to compare the performance of methods for correction of these measurement error effects. The French cohort of uranium miners includes more than 5000 miners chronically exposed to radon with a follow-up duration of 30 years. Measurement errors have been characterized taking into account the evolution of uranium extraction methods and of radiation protection measures over time. A simulation study based on the French cohort of uranium miners has been carried out to investigate the effects of these measurement errors on the estimated ERR and to assess the performance of different methods for correcting these effects. Measurement error associated to radon exposure decreased over time, from more than 45% in the early 70's to about 10% in the late 80's. Its nature also changed over time from mostly Berkson to classical type from 1983. Simulation results showed that measurement error leads to an attenuation of the ERR towards

  13. Evaluation du procédé d'abattage des bovins aux abattoirs de ...

    African Journals Online (AJOL)

    La viande est une denrée alimentaire hautement périssable dont la qualité hygiénique dépend de la contamination pendant les opérations d'abattage et de découpe. L'objectif de l'étude est d'évaluer le procédé d'abattage des bovins aux abattoirs de Cotonou-Porto-Novo au sud-Bénin. L'analyse du procédé d'abattage a ...

  14. Methodes spectrales paralleles et applications aux simulations de couches de melange compressibles

    OpenAIRE

    Male , Jean-Michel; Fezoui , Loula ,

    1993-01-01

    La resolution des equations de Navier-Stokes en methodes spectrales pour des ecoulements compressibles peut etre assez gourmande en temps de calcul. On etudie donc ici la parallelisation d'un tel algorithme et son implantation sur une machine massivement parallele, la connection-machine CM-2. La methode spectrale s'adapte bien aux exigences du parallelisme massif, mais l'un des outils de base de cette methode, la transformee de Fourier rapide (lorsqu'elle doit etre appliquee sur les deux dime...

  15. Mortalite liee au VIH chez les enfants aux Chu campus et tokoin de ...

    African Journals Online (AJOL)

    Introduction. Le but de ce travail était d'étudier la mortalité liée au VIH chez les enfants séropositifs aux CHU-Campus et Tokoin de Lomé. Patients et méthode. Il s'est agi d'une étude prospective qui s'est déroulée dans les services de pédiatrie des CHU-Campus et Tokoin de Lomé et qui a couvert une période de 6 mois ...

  16. Perception des risques liés aux changements climatiques dans les ...

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

    4 sept. 2014 ... L'équipe du projet Perception du risque et vulnérabilité des milieux humides sur la côte atlantique de l'Amérique du Sud, qui a commencé en 2012, privilégie une démarche de gestion intégrée des zones côtières et s'appuie sur les perceptions que les parties prenantes ont des risques liés aux ...

  17. Alternatives to Anti-Personnel Landmines (Solutions de remplacement aux mines antipersonnel)

    Science.gov (United States)

    2003-05-01

    remplacement ont un prix : elles sont plus pesantes sur le plan logistique et impliquent des risques opérationnels pour les forces de l’OTAN. En...très importante, de l’interopérabilité dans le transfert de secteurs qui ont été minés par un pays non-signataire de la Convention d’Ottawa. Le...SEINE CEDEX, FRANCE RTO TECHNICAL REPORT 40(I) Alternatives to Anti-Personnel Landmines (Solutions de remplacement aux mines antipersonnel) Military

  18. William Dab, Danielle Salomon, Agir face aux risques sanitaires. Pour un pacte de confiance

    OpenAIRE

    Vieira Bertho, Isabela

    2016-01-01

    Écrit à deux mains, « Agir face aux risques sanitaires » présente une réflexion sur la gestion actuelle des risques sanitaires en France. Les auteurs William Dab, ancien directeur général de la santé en France et actuel directeur de l’École des sciences industrielles et technologies de l’information au Conservatoire national des arts et métiers (CNAM) et Danielle Salomon, sociologue des organisations et des risques, offrent dans ce livre une analyse de la politique sécuritaire sanitaire franç...

  19. Vulnérabilité des troupeaux transhumants aux mutations climatiques ...

    African Journals Online (AJOL)

    L'élevage bovin occupe une place importante parmi les activités des populations du Nord-Est du Bénin. Cette activité est très vulnérable aux mutations climatiques dans le bassin de la Sota à Malanville situé à l'extrême Nord-Est du Bénin. La présente recherche vise, d'une part, à appréhender, les perceptions des ...

  20. Conference - Découvrez notre région - Aux bornes de Genève

    CERN Multimedia

    Staff Association

    2016-01-01

      Les premières bornes-frontière sont posées en 1816 aux confins du royaume de Sardaigne, d’autres feront leur apparition dès 1818 du côté du royaume de France. Deux cents ans plus tard, on retrouve toujours ces pierres, témoins de la naissance du canton et patrimoine partagé des communes genevoises, gessiennes et savoisiennes qui font notre région.  

  1. Les représentations sociales du travail dans des parcours de retour aux études aux niveaux collégial et universitaire

    Directory of Open Access Journals (Sweden)

    Claude Julie Bourque

    2009-10-01

    Full Text Available Cet article porte sur le volet éducatif de la production et de la reproduction de la main-d’œuvre hautement qualifiée par l’examen des processus en jeu au moment des retours aux études dans des programmes de formation technique et de génie. Nous nous intéressons en particulier à une situation emblématique des référentiels politiques récents en matière d’éducation, soit les retours aux études. Nous cherchons à mieux comprendre comment le retour aux études se réalise, comment les représentations professionnelles agissent sur ce dernier et comment l’expérience scolaire influence les projets des individus. Notre analyse met l’accent sur les ressorts sociaux et culturels des décisions relatives au choix de programmes et à l’orientation professionnelle d’étudiants qui ont interrompu leurs études et qui y retournent. Nous explorons le discours d’étudiants et d’étudiantes qui ont choisi de profiter de la souplesse du système d’éducation québécois pour compléter ou bonifier leur formation initiale ou encore pour tenter une réorientation professionnelle. En particulier, nous désirons savoir comment les différentes formes d’articulation entre éducation et travail influencent les représentations sociales des étudiants au sujet des titres scolaires, de l’évolution de leur carrière scolaire et de leur projet professionnel personnel.This paper deals with the educational aspect of the production and reproduction of highly qualified manpower through examining the processes at play when people return to school by enrolling in technical or engineering training programs. Our interest is focussed specifically on returning to school as an emblematic situation in recent educational policy frameworks. We are trying to better understand how school return is done, how professional representations act upon it and how previous school experience influences individual projects. Our analysis focuses on the

  2. Edgar Morin, aux risques d'une pensée libre

    CERN Document Server

    Pena Vega, Alfredo

    2011-01-01

    8 juillet 2011 ; Edgar Morin fête ses 90 ans et 60 ans passés au sein du CNRS. Une occasion unique pour l'équipe d'Hermès et Dominique Wolton, d'analyser et de critiquer la pensée de ce grand intellectuel. Aspiration à la liberté, attention à la complexité du monde et une profonde originalité épistémologique, Edgar Morin a bouleversé aussi bien la philosophie, la politique que la physique ou les mathématiques. Avec un souci constant : faire communiquer et interagir toutes les sciences pour relever le défi de la compréhension. Plus qu'un simple hommage, ce numéro questionne l'œuvre d'Edgar Morin au filtre de la communication, dévoilant les mécaniques de cette vision du monde profondément originale, échappant aux cloisonnements et aux certitudes académiques, portée par un projet central, celui d'une réforme des connaissances. Suivant les cheminements intellectuels et politiques de ce chercheur itinérant et passionné à travers l'Europe, l'Est, l'Amérique latine ou les États-Unis, ce...

  3. Aux cartes citoyens. La démocratie par les cartes

    Directory of Open Access Journals (Sweden)

    Anne Chapuis

    2000-11-01

    Full Text Available Les cartes, images puissantes rendant visible et compréhensibles des informations nombreuses et complexes, ont une vocation naturelle à servir de support aux débats sur l'aménagement du territoire et aux actions de développement, et en cela être un des outils privilégiés de la démocratie. Plusieurs expériences au sein de collectivités territoriales en France et au sein d'organismes de développement en Inde nous ont démontré que l'utilisation de cartes et matrices pour l'aide à la décision est le plus souvent jugée dangereuse. Bien construites elles sont révélatrices des déséquilibres spatiaux, des enjeux de pouvoir et bien entendu de la corruption. Nous présentons quelques unes de ces expériences avec en arrière plan les enjeux de la démocratie et de la Transparence tant vantées et si peu pratiquées.

  4. Safety Training: Sensibilisation aux gestes et postures de travail

    CERN Multimedia

    Laetitia Laddada

    2004-01-01

    Nous vous proposons un nouveau cours de sécurité lié aux manutentions manuelles (durée 1 jour) : Sensibilisation aux gestes et postures de travail. Si vous êtes amené à manipuler régulièrement des charges lourdes ou volumineuses, cette formation peut vous aider à prévenir les lésions musculaires ou dorsales. A l'issue de cette formation, vous serez capable d'adopter et d'appliquer les principes de base de sécurité physique et d'économie d'efforts dans les manipulations d'objets. Les cours sont pris en charge par la Commission de Sécurité. L'inscription EDH est obligatoire. Pour plus d'information, veuillez consulter les pages Formation & Développement (Groupe Sécurité). Formation & Développement (Groupe Sécurité) FORMATION EN SECURITE SAFETY TRAINING Laetitia Laddada 73811 - 79236 sa...

  5. Safety Training: Sensibilisation aux gestes et postures de travail

    CERN Multimedia

    Laetitia Laddada

    2004-01-01

    >Nous vous proposons un nouveau cours de sécurité lié aux manutentions manuelles (durée 1 jour) : Sensibilisation aux gestes et postures de travail. Si vous êtes amené à manipuler régulièrement des charges lourdes ou volumineuses, cette formation peut vous aider à prévenir les lésions musculaires ou dorsales. A l'issue de cette formation, vous serez capable d'adopter et d'appliquer les principes de base de sécurité physique et d'économie d'efforts dans les manipulations d'objets. Les cours sont pris en charge par la Commission de Sécurité. L'inscription EDH est obligatoire. Pour plus d'information, veuillez consulter les pages Formation & Développement (Groupe Sécurité). Formation & Développement (Groupe Sécurité) FORMATION EN SECURITE SAFETY TRAINING Laetitia Laddada 73811 - 79236 s...

  6. Safety Training: Sensibilisation aux gestes et postures de travail

    CERN Multimedia

    Laetitia Laddada

    2004-01-01

    If you wish to participate in one of the following courses, please discuss with your supervisor and apply electronically directly from the course description pages that can be found on the Web at: http://www.cern.ch/Training/ or fill in an 'application for training' form available from your Divisional Secretariat or from your DTO (Divisional Training Officer). Applications will be accepted in the order of their receipt. Nous vous proposons un nouveau cours de sécurité lié aux manutentions manuelles (durée 1 jour) : Sensibilisation aux gestes et postures de travail. Si vous êtes amené à manipuler régulièrement des charges lourdes ou volumineuses, cette formation peut vous aider à prévenir les lésions musculaires ou dorsales. A l'issue de cette formation, vous serez capable d'adopter et d'appliquer les principes de base de sécurité physique et d'économie d'efforts dans les manipulations...

  7. Safety Training: Sensibilisation aux gestes et postures de travail

    CERN Multimedia

    Laetitia Laddada

    2004-01-01

    Nous vous proposons un nouveau cours de sécurité lié aux manutentions manuelles (durée 1 jour) : Sensibilisation aux gestes et postures de travail. Si vous êtes amené à manipuler régulièrement des charges lourdes ou volumineuses, cette formation peut vous aider à prévenir les lésions musculaires ou dorsales. A l'issue de cette formation, vous serez capable d'adopter et d'appliquer les principes de base de sécurité physique et d'économie d'efforts dans les manipulations d'objets. Les cours sont pris en charge par la Commission de Sécurité. L'inscription EDH est obligatoire. Pour plus d'information, veuillez consulter les pages Formation & Développement (Groupe Sécurité). Formation & Développement (Groupe Sécurité) FORMATION EN SECURITE SAFETY TRAINING Laetitia Laddada 73811 - 79236 safety.training@cern.ch

  8. De la forêt aux champs en Côte d'Ivoire | CRDI - Centre de ...

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

    3 févr. 2011 ... Aujourd'hui, Buyo fait partie de la « nouvelle ceinture du café et du cacao » de la Côte d'Ivoire et est devenu un pôle d'attraction pour les immigrants économiques. La plupart y viennent en quête de terres où s'adonner aux cultures marchandes destinées à l'exportation ou aux marchés locaux. Certains ...

  9. Étude de propriétés structurales et dynamiques par dynamique moléculaire ab initio : application aux verres et aux liquides vitreux

    Science.gov (United States)

    Pasquarellol, A.

    2003-09-01

    La dynamique moléculaire ab initio est une méthode de simulation dans laquelle l'évolution de la structure électronique est prise en compte explicitement. Après une brève description de la méthode, son application aux systèmes vitreux est illustrée à travers des études de SiO2 et de GeSe2. Dans le contexte des systèmes vitreux, les méthodes ab initio servent tout d'abord à la génération de modèles structuraux. Ensuite, ces méthodes peuvent être étendues à l'étude des propriétés vibrationnelles. Les méthodes ab initio constituent aujourd'hui un outil indispensable permettant l'analyse d'une variété de propriétés expérimentales dans le contexte d'un seul cadre théorique cohérent.

  10. Radiation monitor

    International Nuclear Information System (INIS)

    Pao, C.T.; Green, W.K.

    1978-01-01

    A system for indicating radiation from a radioactive fluid such as a gas wherein simultaneous indications of the activity concentration of radioactivity of the gas, the radiation dose rate and average energy of the radiation are provided

  11. Radiation protection

    International Nuclear Information System (INIS)

    Ures Pantazi, M.

    1994-01-01

    This work define procedures and controls about ionizing radiations. Between some definitions it found the following topics: radiation dose, risk, biological effects, international radioprotection bodies, workers exposure, accidental exposure, emergencies and radiation protection

  12. Ionizing radiation

    International Nuclear Information System (INIS)

    Kruger, J.

    1989-01-01

    Ionizing radiation results in biological damage that differs from other hazardous substances and is highly dangerous to man. Ionizing radiation cannot be perceived by man's sense organs and the biological damage cannot be detected immediately afterwards (except in very high doses). Every human being is exposed to low doses of radiation. The structure of the atom; sources of ionizing radiation; radiation units; biological effects; norms for radiation protection; and the national control in South Africa are discussed. 1 fig., 5 refs

  13. Radiation dosimetry

    CERN Document Server

    Hine, Gerald J; Hine, Gerald J

    1956-01-01

    Radiation Dosimetry focuses on the advancements, processes, technologies, techniques, and principles involved in radiation dosimetry, including counters and calibration and standardization techniques. The selection first offers information on radiation units and the theory of ionization dosimetry and interaction of radiation with matter. Topics include quantities derivable from roentgens, determination of dose in roentgens, ionization dosimetry of high-energy photons and corpuscular radiations, and heavy charged particles. The text then examines the biological and medical effects of radiation,

  14. Localized iron supply triggers lateral root elongation in Arabidopsis by altering the AUX1-mediated auxin distribution.

    Science.gov (United States)

    Giehl, Ricardo F H; Lima, Joni E; von Wirén, Nicolaus

    2012-01-01

    Root system architecture depends on nutrient availability, which shapes primary and lateral root development in a nutrient-specific manner. To better understand how nutrient signals are integrated into root developmental programs, we investigated the morphological response of Arabidopsis thaliana roots to iron (Fe). Relative to a homogeneous supply, localized Fe supply in horizontally separated agar plates doubled lateral root length without having a differential effect on lateral root number. In the Fe uptake-defective mutant iron-regulated transporter1 (irt1), lateral root development was severely repressed, but a requirement for IRT1 could be circumvented by Fe application to shoots, indicating that symplastic Fe triggered the local elongation of lateral roots. The Fe-stimulated emergence of lateral root primordia and root cell elongation depended on the rootward auxin stream and was accompanied by a higher activity of the auxin reporter DR5-β-glucuronidase in lateral root apices. A crucial role of the auxin transporter AUXIN RESISTANT1 (AUX1) in Fe-triggered lateral root elongation was indicated by Fe-responsive AUX1 promoter activities in lateral root apices and by the failure of the aux1-T mutant to elongate lateral roots into Fe-enriched agar patches. We conclude that a local symplastic Fe gradient in lateral roots upregulates AUX1 to accumulate auxin in lateral root apices as a prerequisite for lateral root elongation.

  15. Les stratégies d'adaptation aux cyclones dans la région d ...

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

    appui au développement de la culture du poivre et de la vanille pourrait contribuer à réduire la vulnérabilité des producteurs de clou de girofle en les aidant à s'adapter aux changements climatiques et à l'intensité croissante ...

  16. A. Lacassagne : de l’archive mineure aux Archives d’anthropologie criminelle

    Directory of Open Access Journals (Sweden)

    Philippe Artières

    2005-01-01

    Full Text Available En 1921, le médecin Alexandre Lacassagne offre à la ville de Lyon ses archives et son importante bibliothèque. Depuis son installation au début des années 1880, Lacassagne qui y détient la chaire de médecine légale et de toxicologie, est devenu l’une des figures les plus célèbre de la ville. Il est intervenu à plusieurs reprises dans les affaires municipales et notamment en matière d’hygiène urbaine, il a surtout pris part comme expert aux grandes affaires criminelles ; il a ainsi fait de Lyo...

  17. Des furoncles résistants aux antibiotiques: penser à la myiase !!

    Science.gov (United States)

    Ajili, Faida; Abid, Rim; Bousseta, Najeh; Mrabet, Ali; Karoui, Ghazi; Louzir, Bassem; Battikh, Riadh; Othmani, Salah

    2013-01-01

    Les myiases sont des infections parasitaires par des larves de mouches. La localisation cutanée doit être évoquée de retour d'un pays tropical devant une évolution inhabituelle de lésions cutanées. Nous rapportons une observation d'un militaire tunisien, ayant séjourné en République Démocratique du Congo. Il était atteint de myiase cutanée simulatrice d'une furonculose résistante aux antibiotiques. L'intérêt de cette observation est de souligner l'importance d’évoquer la myiase dont le traitement est simple et rapide chez un patient de retour de zone d'endémie. PMID:24106569

  18. Dynamiques de résistance aux normes révolutionnaires à Cuba

    OpenAIRE

    Geoffray, Marie-Laure

    2013-01-01

    Les normes du régime révolutionnaire sont, à Cuba, inscrites dans l’espace. Elles fonctionnent comme des signes performatifs qui à la fois rappellent constamment la présence du pouvoir et catégorisent les individus selon leur conformité aux normes. Mais, depuis la crise économique des années 1990, des logiques centrifuges à l’œuvre au sein de la société cubaine viennent remettre en question la capacité du régime à générer une socialisation révolutionnaire homogène. On observe des dynamiques s...

  19. Observation spatiale et SIG: des outils pour cartographier les zones sensibles aux mouvements de terrain

    Directory of Open Access Journals (Sweden)

    Jean-Yves SCANVIC

    1994-12-01

    Full Text Available Les niveaux de sensibilité des sols aux mouvements de terrain ont été cartographiés dans différents bassins de risques en Bolivie, en Colombie et à Taïwan, selon une méthodologie développée au BRGM et fondée en partie sur l’extraction visuelle et numérique d’informations contenues dans les données de télédétection spatiale stéréoscopiques et leur gestion-valorisation dans un SIG. Ces cartes font apparaître l’intérêt de l’imagerie Spot pour la gestion du risque naturel.

  20. Safety Training: Ergonomie - Sensibilisation aux gestes et postures de travail

    CERN Multimedia

    Laetitia Laddada

    2004-01-01

    Nous vous proposons un nouveau cours d'ergonomie (durée : 1 jour) Sensibilisation aux gestes et postures de travail. A l'issue de cette formation, vous serez capable d'adopter et d'appliquer les principes de base de sécurité physique et d'économie d'efforts dans les manipulations d'objets. Les cours sont pris en charge par la Commission de Sécurité. L'inscription EDH est obligatoire. Pour plus d'information, veuillez consulter les pages Formation & Développement (Groupe Sécurité). FORMATION EN SECURITE SAFETY TRAINING Laetitia Laddada 73811 - 79236 safety.training@cern.ch

  1. Marjane Satrapi’s Poulet aux Prunes: fetish, desire, and illusions

    Directory of Open Access Journals (Sweden)

    Stefania Rimini

    2013-07-01

    Full Text Available Il saggio si propone di individuare e descrivere le sfumature erotiche e sentimentali del film Poulet aux prunes di Marjane Satrapi, felice adattamento dell’omonima graphic novel. Il racconto procede per scarti, ellissi, anticipazioni e flasback, dando luogo a una narrazione labirintica dalla singolare trama arabescante. Le sottili dinamiche seduttive messe in campo dal complesso stile di regia di Satrapi-Paronnaud vengono analizzate alla luce delle categorie feticistiche individuate da Massimo Fusillo, che offrono interessanti modelli di interazione fra desiderio e creatività. L’esito di tale indagine consente di ampliare il dibattito relativo al rapporto di scambio e interferenza fra oggetti, pulsioni e sguardi nel cinema contemporaneo.

  2. Radiation protection

    CERN Multimedia

    CERN. Geneva

    2001-01-01

    This will be a simple explanation of the reasons why CERN has to be careful about radiation protections issues, a practical guide on how to recognize radiation dangers, the monitoring systems that make sure radiation levels are well tolerable norms, and a quick summary of what radiation levels mean in terms of personal risk.

  3. Infrared gas heating applied to industrial processes; Le chauffage infrarouge au gaz applique aux procedes industriels

    Energy Technology Data Exchange (ETDEWEB)

    Goodhue, C. [Gaz Metropolitain, Montreal, PQ (Canada)

    1996-03-01

    The theory of radiative heat transfer and the concepts of emissive power and coupled emitters and receptors were presented. Different types of radiative infrared gas heaters available for industrial applications were also reviewed. These include perforated ceramic plate heaters, fibrous panels, combined radiative and convective ceramic heaters, radiative tubes and catalytic panels. The respective advantages of these different heaters were discussed. Application domains of infrared radiative gas heaters include drying in the pulp and paper and textile industries, various drying and baking needs in the agro-food industry, and other applications in the plastic and paint industries. 3 figs.

  4. Neutron moderation at very low temperatures (1691); Moderation des neutrons aux tres basses temperatures (1961)

    Energy Technology Data Exchange (ETDEWEB)

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

    1961-04-15

    Starting from Harwell experiment carried out inside a low-power reactor, we intended to maintain a liquid hydrogen cell in a channel of the EL3 reactor (at Saclay) whose thermal neutrons flux is 10{sup 14} neutrons/cm{sup 2}/s. We tried to work out a device giving off an important beam of cold neutrons and able to operate in a way as automatic as possible during many consecutive day without a stop. Several circuits have already been achieved at very low temperatures but they brought out volumes and fluxes much lower than those we used this time. The difficulties we have met in carrying out such a device arose on the one hand from the very high energy release to which any kind of experiment is inevitably submitted when placed near the core of the reactor, on the other, hand from the very little room which is available in experimental channels of reactors. In such condition, it is necessary to use a moderator as effective as possible. This study is divided into three parts ; in the first part, we try to determine: a) conditions in which moderation takes place, hence the volume of the cell; b) materials likely to be used at low temperature and in pile; c) cooling system; hence we had to study fluid flow conditions at very low temperatures in very long ducts. The second part is devoted to the description of the device. The third part ventilates the results we have obtained. (author) [French] Partant de l'experience de Harwell faite dans une pile de faible puissance, nous nous sommes propose de maintenir une cellule d'hydrogene liquide dans un canal de la pile EL3 de Saclay dont le flux de neutrons thermiques est de 10{sup 14} neutrons par seconde et par cm{sup 2}. Nous avons cherche a realiser une installation donnant un faisceau de neutrons froids important, et pouvant fonctionner d'une maniere aussi automatique que possible, pendant des periodes de plusieurs jours sans arret. Plusieurs circuits aux tres basses temperatures ont deja ete realises, mais

  5. Etude sur les tendons en materiaux composites et leur application aux ancrages postcontraints

    Science.gov (United States)

    Chennouf, Adil

    L'objectif general de la presente these est d'evaluer le comportement a l'arrachement et au fluage d'ancrages injectes constitues de tendons en materiaux composites afin d'etablir des recommandations plus appropriees et realistes pour le dimensionnement et la conception. Quatre types de tendons en materiaux composites, deux a base de fibres d'aramide et deux a base de fibres de carbone, ont ete utilises dans l'etude. Les travaux de recherche de cette these ont porte notamment sur: (I) Une caracterisation physique et mecanique des tendons en materiaux composites utilises dans l'etude. (II) Une etude en laboratoire sur les coulis de scellement. La premiere etape de cette etude a concerne le developpement d'un coulis de scellement performant adapte aux tendons en materiaux composites et a differentes situations d'injection. La seconde etape a traite des essais de caracterisations physique et mecanique du coulis de scellement developpe comparativement a trois coulis de scellement usuels d'un meme rapport E/L de 0,4. (III) Une etude sur des modeles reduits d'ancrages injectes. (IV) Une etude sur des modeles d'ancrages a grande echelle. La synthese de ces etudes a permis d'enoncer les principales conclusions suivantes: (1) Les valeurs moyennes des charges de rupture des tendons en materiaux composites ont ete de 1% a 29% superieures a celles specifiees par les manufacturiers. (2) L'etude sur les coulis de scellement a permis le developpement de coulis de ciment repondant aux criteres fixes, soient une grande stabilite, une bonne fluidite, une legere expansion et de bonnes caracteristiques mecaniques. (3) Les tendons en materiaux composites ont montre des contraintes d'adherence maximum superieures a celles des tendons en acier. (4) Le type de fibre, la configuration et le fini de surface des tendons en materiaux composites gouvernent leur resistance a l'adherence. (5) L'introduction de sable et d'autres ajouts comme les fines de silice et la poudre d'aluminium au coulis

  6. Conséquences comportementales de la violence faite aux enfants

    Science.gov (United States)

    Al Odhayani, Abdulaziz; Watson, William J.; Watson, Lindsay

    2013-01-01

    Résumé Objectif Discuter des répercussions de la violence sur le développement comportemental durant l’enfance, mettre en évidence certains signes comportementaux susceptibles d’alerter les médecins à la présence d’une maltraitance continue d’un enfant et explorer le rôle précis du médecin de famille dans une telle situation clinique. Sources des données Une recension systématique a servi à examiner la recherche pertinente, les articles de révision clinique et les sites web des organismes de protection de la jeunesse. Message principal Le comportement d’un enfant est une manifestation extériorisée de sa stabilité et de sa sécurité intérieures. C’est une lentille au travers de laquelle le médecin de famille peut observer le développement de l’enfant pendant toute sa vie. Tous les genres de violence sont dommageables pour les enfants, qu’elle soit physique, affective ou psychologique, et peuvent causer des problèmes à long terme dans le développement du comportement et de la santé mentale. Les médecins de famille doivent connaître les indices de maltraitance et de négligence envers les enfants et être aux aguets de ces derniers afin d’entreprendre les interventions appropriées et améliorer les résultats pour ces enfants. Conclusion La violence faite aux enfants peut causer un développement psychologique désordonné et des problèmes de comportement. Les médecins de famille exercent un rôle important dans la reconnaissance des signes comportementaux laissant présager une maltraitance, ainsi que pour offrir de l’aide afin de protéger les enfants.

  7. Former aux TICE : entre compétences techniques et modèles pédagogiques

    OpenAIRE

    Jacques Béziat

    2012-01-01

    [Français] Cette contribution discute des enjeux et des limites d’une formation aux compétences techniques attendues des futurs enseignants d’école primaire. Une formation est certainement nécessaire pour espérer voir des pratiques pédagogiques avec les TICE se développer en classe. Mais ce n’est qu’un des leviers pour leur intégration dans les pratiques scolaires. Une formation aux TICE suppose que l’on mette l’accent sur l’analyse de pratiques. Plus que de former « simplement » à l’usage pé...

  8. Former aux TICE : entre compétences techniques et modèles pédagogiques

    Directory of Open Access Journals (Sweden)

    Jacques Béziat

    2012-01-01

    Full Text Available Cette contribution discute des enjeux et des limites d’une formation aux compétences techniques attendues des futurs enseignants d’école primaire. Une formation est certainement nécessaire pour espérer voir des pratiques pédagogiques avec les TICE se développer en classe. Mais ce n’est qu’un des leviers pour leur intégration dans les pratiques scolaires. Une formation aux TICE suppose que l’on mette l’accent sur l’analyse de pratiques. Plus que de former « simplement » à l’usage pédagogique d’outils numériques, il est indispensable de former à la complexité de leurs enjeux intellectuels et pratiques.

  9. Radiation Therapy

    Science.gov (United States)

    ... radiation may be external, from special machines, or internal, from radioactive substances that a doctor places inside your body. The type of radiation therapy you receive depends on many factors, including The ...

  10. Radiation safety

    International Nuclear Information System (INIS)

    Woods, D.A.

    1982-01-01

    Sections include: dose units, dose limits, dose rate, potential hazards of ionizing radiations, control of internal and external radiation exposure, personal dosemeters, monitoring programs and transport of radioactive material (packaging and shielding)

  11. Radiation Therapy

    Science.gov (United States)

    ... kill any cancer cells that remain. Lifetime Dose Limits There is a limit to the amount of radiation an area of ... total dose of radiation more quickly or to limit damage to healthy cells. Different ways of delivering ...

  12. Radiation Emergencies

    Science.gov (United States)

    ... amounts of radiation and could be caused by Dirty bombs - a mix of explosives with radioactive powder Fallout from a nuclear bomb Accidental release from a nuclear reactor or a nuclear weapons plant A lot of radiation over a short ...

  13. Medical radiation

    Energy Technology Data Exchange (ETDEWEB)

    1992-06-01

    This leaflet in the At-a-Glance Series describes the medical use of X-rays, how X-rays help in diagnosis, radiation protection of the patient, staff protection, how radioactive materials in nuclear medicine examinations help in diagnosis and the use of radiation in radiotherapy. Magnetic resonance imaging, a diagnostic technique involving no ionizing radiation, is also briefly examined. The role of the NRPB in the medical use of radiation is outlined. (UK).

  14. Recours aux TIC pour résoudre les problèmes d'eau en Ouganda ...

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

    Les technologies de l'information et de la communication (TIC) peuvent grandement aider les collectivités à se préparer et à s'adapter aux effets des changements climatiques. Divers projets rendent compte de l'utilité de recourir à de nouvelles technologies (telles que le téléphone mobile) et à des technologies classiques ...

  15. Recours aux TIC pour résoudre les problèmes d'eau en Ouganda ...

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

    15 janv. 2012 ... Les technologies de l'information et de la communication (TIC) peuvent grandement aider les collectivités à se préparer et à s'adapter aux effets des changements climatiques. Divers projets rendent compte de l'utilité de recourir à de nouvelles technologies (telles que le téléphone mobile) et à des ...

  16. Systèmes locaux d'alerte précoce et de réponse aux urgences ...

    African Journals Online (AJOL)

    SARAH

    30 janv. 2015 ... RÉSUMÉ. Objectif : L'étude vise à analyser le fonctionnement des observatoires de Suivi de la Vulnérabilité (OSV) et des. Structures Communautaires d'Alerte Précoce et des Réponses aux Urgences (SCAP-RU) au Niger. Méthodologie et résultats : l'étude a été conduite sur la base des enquêtes terrain ...

  17. Accroître la participation des femmes aux marchés du bétail | IDRC ...

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

    6 juin 2016 ... Lorsqu'elles gèrent leurs propres revenus, les femmes peuvent jouir d'un plus grand pouvoir de négociation, réduire la violence conjugale dont elles font l'objet et améliorer l'état nutritionnel de leurs enfants. Cela dit, il est difficile pour les femmes de participer aux marchés en raison de leur mobilité ...

  18. Facilitation de l'accès des personnes aux prises avec des difficultés ...

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

    Le nombre d'enfants aux prises avec des difficultés mentales est important et augmente à un rythme alarmant en Inde. On estime qu'environ 1 % des enfants sont atteints de troubles du spectre autistique, et que de 2 à 5 % des enfants souffrent d'un problème de traitement de l'information auditive. Ces enfants se heurtent à ...

  19. Vulnérabilité des systèmes d'approvisionnement en Eau Face aux ...

    African Journals Online (AJOL)

    C'est ainsi qu'il sera judicieux de renforcer la protection des dispositifs en place pour augmenter leur résilience aux inondations. A court terme, il est préconisé des technologies résilientes. A long terme, la solution durable serait d'intégrer une gestion adaptative de la ressource en eau au niveau des bassins versants pour ...

  20. Étude sur l'escalade de la violence faite aux femmes en Amérique ...

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

    21 juin 2016 ... En Amérique centrale, on assiste à une escalade de la violence faite aux femmes et du nombre de meurtres de femmes (ou femicides). Or, il y a des lacunes sur le plan du signalement. Primo, malgré les efforts déployés par les organisations féministes, les groupes de défense des droits de la personne, les ...

  1. Accroître la participation des femmes aux marchés du bétail | CRDI ...

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

    6 juin 2016 ... Lorsqu'elles gèrent leurs propres revenus, les femmes peuvent jouir d'un plus grand pouvoir de négociation, réduire la violence conjugale dont elles font l'objet et améliorer l'état nutritionnel de leurs enfants. Cela dit, il est difficile pour les femmes de participer aux marchés en raison de leur mobilité ...

  2. GESTION BANCAIRE DU RISQUE DE NON-REMBOURSEMENT DES CREDITS AUX ENTREPRISES : UNE REVUE DE LA LITTERATURE

    OpenAIRE

    Véronique Rougès

    2003-01-01

    International audience; Les banquiers subissent un risque de nonremboursement des crédits aux entreprises. Ce risque peut être réduit lors des deux phases du crédit : lors de l'octroi, par une analyse du risque de défaillance et la rédaction de contrats incitatifs, et en cours de vie, par un suivi actif du crédit.

  3. Accès aux prix sur petit écran en vue de transformer les marchés ...

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

    13 oct. 2010 ... Toute l'attention est portée à la vente; le prix a évidemment son importance, mais il est d'avis que l'information aux étapes précédant la vente importe elle ... In Sri Lanka, the government is aiming to double fish consumption per capita from 11 to 22 kg per year by the end of 2014 to boost dietary protein.

  4. Second meeting of the Atomic and Molecular Data Centre network. Fontenay aux Roses, 23-24 May 1980

    International Nuclear Information System (INIS)

    Katsonis, K.

    1980-11-01

    Summary report of the Second A+M Data Centre Network (DCN) meeting convened by the IAEA Nuclear Data Section at the CEA Laboratory at Fontenay-aux-Roses, France, 23-24 May 1980. The meeting was attended by 20 representatives from centres and groups from six Member States concerned with the coordinated international management of atomic and molecular data pertinent to controlled fusion research and technology

  5. Amélioration de la capacité d'adaptation sociale et écologique aux ...

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

    Amélioration de la capacité d'adaptation sociale et écologique aux changements climatiques dans le bassin versant du fleuve Orotoy, en Colombie. En Colombie, les inondations, les glissements de terrain et les sécheresses de plus en plus intenses se multiplient en raison des phénomènes météorologiques extrêmes.

  6. Amélioration de l'accès à la justice et aux services essentiels dans ...

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

    Amélioration de l'accès à la justice et aux services essentiels dans les établissements spontanés de Nairobi. Plus de la moitié des résidents de Nairobi, au Kenya, occupent des établissements spontanés, ou bidonvilles, dans des conditions difficiles. Leurs logements sont inadéquats et ils ont un accès insuffisant à l'eau ...

  7. Comment utiliser les TIC pour s'attaquer aux problèmes de santé ...

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

    On appelle souvent cybersanté l'utilisation des technologies de l'information et de la communication (TIC) dans les systèmes de santé. ... à réfléchir aux tendances que l'on observe actuellement au chapitre de la cybersanté et du renforcement des systèmes de santé, et à trouver sa niche dans ce dynamique champ de ...

  8. Systèmes locaux d'alerte précoce et de réponse aux urgences ...

    African Journals Online (AJOL)

    Le Dispositif National de Prévention et de Gestion des Catastrophes et Crises Alimentaires (DNPGCCA) ne peut donc fonctionner en marge de cette initiative qui a gagné le mérite de faire avancer le système d'alerte précoce et de réponse aux urgences par une meilleure responsabilisation des communautés et des élus ...

  9. Etude de l'auto-adaptivité du filtre actif parallèle aux variations de la ...

    African Journals Online (AJOL)

    Pour assurer l'auto-additivité du filtre aux variations de la charge, deux schémas de régulation à base du régulateur P sont proposés, l'un pour la tension continue et ... To ensure filter auto-adaptivity, two control schemes based on P controller are proposed; one for dc voltage control and the second for the injected current ...

  10. Facteurs associes aux décès des nouveau-nés suspects d'infections ...

    African Journals Online (AJOL)

    Facteurs associes aux décès des nouveau-nés suspects d'infections bactériennes au Centre Hospitalier Universitaire Pédiatrique Charles de Gaulle de Ouagadougou, Burkina Faso. Solange Odile Yugbaré Ouédraogo, Désiré Méda, Lassina Dao, Fla Kouéta, Kam Ludovic, Ramata Ouédraogo Traoré, Diarra Yé ...

  11. Améliorer l'accès aux soins de santé en Afrique subsaharienne ...

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

    7 juin 2016 ... Aux quatre coins de l'Afrique, les systèmes de santé sont minés par l'absence de ressources adéquates et le fardeau de plus en plus lourd des maladies. Pour lutter contre les maladies et améliorer le bien-être et la santé des populations, il faut s'assurer que les habitants peuvent accéder en temps ...

  12. Facilitation de l'accès des personnes aux prises avec des difficultés ...

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

    Cette subvention permettra à un petit groupe d'enfants de surmonter de sérieuses difficultés grâce à l'utilisation judicieuse des TIC et, dans la foulée, de valider une méthodologie peu coûteuse visant à faciliter l'apprentissage et la communication chez les enfants aux prises avec des difficultés mentales. La documentation ...

  13. Trousse de suivi et d'évaluation destinée aux initiatives d'adaptation ...

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

    En Afrique, bon nombre de pays, de régions et d'organismes se dotent de programmes d'adaptation aux changements climatiques. Pour que ces programmes portent leurs fruits, ils devront régulièrement faire l'objet d'un suivi et d'une évaluation. Cette subvention servira à financer l'intégration d'un volet suivi et évaluation ...

  14. Application des innovations liées aux légumineuses pour la sécurité ...

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

    L'Éthiopie présente l'un des taux de prévalence les plus élevés au monde quant à la malnutrition protéinocalorique et aux carences en micronutriments. Ce projet donnera lieu à l'application à grande échelle de nouveaux produits dérivés des légumineuses (les pois chiches et les haricots, par exemple) dans le sud de ...

  15. La politique européenne d’aide à la mise aux normes de qualité

    Directory of Open Access Journals (Sweden)

    Vialatte Philippe

    2001-05-01

    Full Text Available La Commission européenne peut aider les pays en développement à financer des programmes de mise aux normes de qualité pour contribuer à la lutte contre la pauvreté, améliorer les conditions de vie des populations locales et leur permettre de bénéficier encore plus largement des opportunités offertes par le marché européen.

  16. Phloem-specific expression of a melon Aux/IAA in tomato plants alters auxin sensitivity and plant development

    Directory of Open Access Journals (Sweden)

    Guy eGolan

    2013-08-01

    Full Text Available Phloem sap contains a large repertoire of macromolecules in addition to sugars, amino acids, growth substances and ions. The transcription profile of melon phloem sap contains over 1,000 mRNA molecules, most of them associated with signal transduction, transcriptional control, and stress and defense responses. Heterografting experiments have established the long-distance trafficking of numerous mRNA molecules. Interestingly, several trafficking transcripts are involved in the auxin response, including two molecules coding for auxin/indole acetic acid (Aux/IAA. To further explore the biological role of the melon Aux/IAA transcript CmF-308 in the vascular tissue, a cassette containing the coding sequence of this gene under a phloem-specific promoter was introduced into tomato plants. The number of lateral roots was significantly higher in transgenic plants expressing CmF-308 under the AtSUC2 promoter than in controls. A similar effect on root development was obtained after transient expression of CmF-308 in source leaves of N. benthamiana plants. An auxin-response assay showed that CmF-308-transgenic roots are more sensitive to auxin than control roots. In addition to the altered root development, phloem-specific expression of CmF-308 resulted in shorter plants, a higher number of lateral shoots and delayed flowering, a phenotype resembling reduced apical dominance. In contrast to the root response, cotyledons of the transgenic plants were less sensitive to auxin than control cotyledons. The reduced auxin sensitivity in the shoot tissue was confirmed by lower relative expression of several Aux/IAA genes in leaves and an increase in the relative expression of a cytokinin-response regulator, TRR8/9b. The accumulated data suggest that expression of Aux/IAA in the phloem modifies auxin sensitivity in a tissue-specific manner, thereby altering plant development.

  17. Droits des femmes et accès à l'eau et aux systèmes d ...

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

    L'ONG Women in Cities International (WICI) tente de trouver des moyens de remédier à cette situation en Inde. Cette subvention lui permettra d'utiliser le ... Le CRDI aide l'Inde à s'adapter aux changements climatiques au moyen de données probantes, et en faisant preuve d'innovation. Le CRDI investit dans des solutions ...

  18. Les références aux documents en ligne dans les textes scientifiques

    Directory of Open Access Journals (Sweden)

    Marc Couture

    2010-01-01

    Full Text Available Avec le développement de la diffusion en ligne de documents scientifiques, la primauté reconnue traditionnellement à l’imprimé devient de moins en moins pertinente; les références à des ressources et documents en ligne forment ainsi une proportion significative des références dans certaines revues scientifiques, notamment celles qui, comme la RITPU, s’intéressent à l’information et à la communication. Dans cet article, on passe d’abord en revue les divers rôles des références répertoriés dans la littérature. On décrit ensuite les caractéristiques et les conditions permettant aux documents en ligne de jouer pleinement ces rôles. On montre enfin comment, dans l’adaptation française des normes de l’APA adoptée par la RITPU, certains choix touchant le format des notices des documents en ligne facilitent la tâche des évaluateurs et des lecteurs des articles. Par la même occasion, les auteurs y trouveront conseils et consignes visant à rendre plus pertinente et efficace cette dimension souvent négligée de la communication scientifique.

  19. La formation des enseignants aux TIC : allier pédagogie et innovation

    Directory of Open Access Journals (Sweden)

    Marcel Lebrun

    2004-01-01

    Full Text Available Relativement au champ des technologies éducatives, nous souhaitons étayer l’hypothèse suivante : si généralement on attribue le fait d’apprendre aux étudiants, il est aussi vrai que les enseignants apprennent, que les sociétés apprennent. La cohérence et la préoccupation de ces différents niveaux (étudiants, enseignants, institutions autour de la question de l’apprentissage peuvent, selon nous, être considérées comme un guide et comme un signe d’une éducation de qualité. Dans ce cas, les modèles généraux de l’apprentissage et du développement de dispositifs pédagogiques peuvent être interrogés afin d’élaborer de nouveaux usages et de nouvelles méthodes d’enseignement et de formation des enseignants, pour promouvoir l’innovation technologique dans les institutions et pour en valider la qualité.

  20. Cours Sécurité : Sensibilisation aux gestes et postures de travail

    CERN Multimedia

    DGS Unit

    2010-01-01

    Prochaine session le 21 octobre 2010. 12 places disponibles. Ce cours concerne toutes les personnes appelées à réaliser des manutentions manuelles dans le cadre de leurs activités. Contenu du cours : Théorie - Présentation des objectifs du programme ; - L'accident du travail (définition, coûts) ; - Statistiques CNAM ; - Notion d'anatomie (mécanique humaine) ; - Les différentes pathologies (lumbago, sciatique, hernie discale) ; - Discussion sur les problèmes particuliers rencontrés dans la vie courante. Pratique - Les efforts mécaniques sur la colonne dus aux mauvaises postures ; - Les principes de base de l'utilisation de la mécanique humaine ; - Exercices pratiques d'application (sur objets divers standards) ; - Prises de vues au caméscope des positions de chacun. Pour vous inscrire : https://edh.cern.ch/Document/Personnel/TRN?new=YES&...

  1. Radiation watchdog

    International Nuclear Information System (INIS)

    Manning, R.

    1984-01-01

    Designated by WHO as a Collaborating Centre, the Radiation Emergency Assistance Center/Training Site (REAC/TS) in Oak Ridge, Tennessee provides assistance to all countries of the Americas in radiation accidents including human contamination or overexposure. It also conducts courses in radiation emergency response for health professionals from throughout the world

  2. Radiation Exposure

    Science.gov (United States)

    Radiation is energy that travels in the form of waves or high-speed particles. It occurs naturally in sunlight. Man-made radiation is used in X-rays, nuclear weapons, nuclear power plants and cancer treatment. If you are exposed to small amounts of radiation over a long ...

  3. Des femmes réclament un accès plus sûr à l'eau et aux installations ...

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

    20 févr. 2013 ... Les femmes qui ont été déplacées des bidonvilles du centre-ville de New Delhi vers des zones isolées en périphérie de la capitale s'exposent quotidiennement à des affronts et à des dangers lorsqu'elles vont chercher de l'eau ou se rendent aux toilettes publiques. Grâce aux marches exploratoires, un ...

  4. Les Nigérianes améliorent leur sort grâce aux légumes indigènes ...

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

    6 juin 2016 ... Le microdosage des engrais, une innovation qui profite aux femmes du Sahel. Grâce à l'application localisée de petites quantités d'engrais (ou microdosage), alliée à l'amélioration des trous d'ensemencement afin de recueill. Voir davantageLe microdosage des engrais, une innovation qui profite aux ...

  5. Shoot-supplied ammonium targets the root auxin influx carrier AUX1 and inhibits lateral root emergence in Arabidopsis

    KAUST Repository

    Li, Baohai

    2011-03-24

    Deposition of ammonium (NH4 +) from the atmosphere is a substantial environmental problem. While toxicity resulting from root exposure to NH4 + is well studied, little is known about how shoot-supplied ammonium (SSA) affects root growth. In this study, we show that SSA significantly affects lateral root (LR) development. We show that SSA inhibits lateral root primordium (LRP) emergence, but not LRP initiation, resulting in significantly impaired LR number. We show that the inhibition is independent of abscisic acid (ABA) signalling and sucrose uptake in shoots but relates to the auxin response in roots. Expression analyses of an auxin-responsive reporter, DR5:GUS, and direct assays of auxin transport demonstrated that SSA inhibits root acropetal (rootward) auxin transport while not affecting basipetal (shootward) transport or auxin sensitivity of root cells. Mutant analyses indicated that the auxin influx carrier AUX1, but not the auxin efflux carriers PIN-FORMED (PIN)1 or PIN2, is required for this inhibition of LRP emergence and the observed auxin response. We found that AUX1 expression was modulated by SSA in vascular tissues rather than LR cap cells in roots. Taken together, our results suggest that SSA inhibits LRP emergence in Arabidopsis by interfering with AUX1-dependent auxin transport from shoot to root. © 2011 Blackwell Publishing Ltd.

  6. Alkoxy-auxins are selective inhibitors of auxin transport mediated by PIN, ABCB, and AUX1 transporters.

    Science.gov (United States)

    Tsuda, Etsuko; Yang, Haibing; Nishimura, Takeshi; Uehara, Yukiko; Sakai, Tatsuya; Furutani, Masahiko; Koshiba, Tomokazu; Hirose, Masakazu; Nozaki, Hiroshi; Murphy, Angus S; Hayashi, Ken-ichiro

    2011-01-21

    Polar auxin movement is a primary regulator of programmed and plastic plant development. Auxin transport is highly regulated at the cellular level and is mediated by coordinated transport activity of plasma membrane-localized PIN, ABCB, and AUX1/LAX transporters. The activity of these transporters has been extensively analyzed using a combination of pharmacological inhibitors, synthetic auxins, and knock-out mutants in Arabidopsis. However, efforts to analyze auxin-dependent growth in other species that are less tractable to genetic manipulation require more selective inhibitors than are currently available. In this report, we characterize the inhibitory activity of 5-alkoxy derivatives of indole 3-acetic acid and 7-alkoxy derivatives of naphthalene 1-acetic acid, finding that the hexyloxy and benzyloxy derivatives act as potent inhibitors of auxin action in plants. These alkoxy-auxin analogs inhibit polar auxin transport and tropic responses associated with asymmetric auxin distribution in Arabidopsis and maize. The alkoxy-auxin analogs inhibit auxin transport mediated by AUX1, PIN, and ABCB proteins expressed in yeast. However, these analogs did not inhibit or activate SCF(TIR1) auxin signaling and had no effect on the subcellular trafficking of PIN proteins. Together these results indicate that alkoxy-auxins are inactive auxin analogs for auxin signaling, but are recognized by PIN, ABCB, and AUX1 auxin transport proteins. Alkoxy-auxins are powerful new tools for analyses of auxin-dependent development.

  7. Alkoxy-auxins Are Selective Inhibitors of Auxin Transport Mediated by PIN, ABCB, and AUX1 Transporters*

    Science.gov (United States)

    Tsuda, Etsuko; Yang, Haibing; Nishimura, Takeshi; Uehara, Yukiko; Sakai, Tatsuya; Furutani, Masahiko; Koshiba, Tomokazu; Hirose, Masakazu; Nozaki, Hiroshi; Murphy, Angus S.; Hayashi, Ken-ichiro

    2011-01-01

    Polar auxin movement is a primary regulator of programmed and plastic plant development. Auxin transport is highly regulated at the cellular level and is mediated by coordinated transport activity of plasma membrane-localized PIN, ABCB, and AUX1/LAX transporters. The activity of these transporters has been extensively analyzed using a combination of pharmacological inhibitors, synthetic auxins, and knock-out mutants in Arabidopsis. However, efforts to analyze auxin-dependent growth in other species that are less tractable to genetic manipulation require more selective inhibitors than are currently available. In this report, we characterize the inhibitory activity of 5-alkoxy derivatives of indole 3-acetic acid and 7-alkoxy derivatives of naphthalene 1-acetic acid, finding that the hexyloxy and benzyloxy derivatives act as potent inhibitors of auxin action in plants. These alkoxy-auxin analogs inhibit polar auxin transport and tropic responses associated with asymmetric auxin distribution in Arabidopsis and maize. The alkoxy-auxin analogs inhibit auxin transport mediated by AUX1, PIN, and ABCB proteins expressed in yeast. However, these analogs did not inhibit or activate SCFTIR1 auxin signaling and had no effect on the subcellular trafficking of PIN proteins. Together these results indicate that alkoxy-auxins are inactive auxin analogs for auxin signaling, but are recognized by PIN, ABCB, and AUX1 auxin transport proteins. Alkoxy-auxins are powerful new tools for analyses of auxin-dependent development. PMID:21084292

  8. Synthesis of bimetallic nanocompositions AuxPd1-x/γ-Al2O3 for catalytic CO oxidation

    Science.gov (United States)

    Zaytsev, S. Yu.; Plyusnin, P. E.; Slavinskaya, E. M.; Shubin, Yu. V.

    2017-11-01

    Colloidal suspensions of AuxPd1-x nanoalloys were prepared via hydrazine co-reduction of [AuCl4]- and [PdCl4]2- complex anions in aqueous solution. High molecular weight polymeric compounds polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), and cryptoionic surfactants (AF-6 and AF-12 neonols, Triton X-100) were used as surface capping agents. Nanoparticles prepared under different experimental conditions were immobilized on γ-Al2O3 supports. The removal of the capping agents from the surface of the active particles was achieved through calcination of samples in oxidative atmosphere (air, 500 °C). This pretreatment of the catalysts significantly enhances their performance. Powder XRD, TEM, and EDX were employed to characterize the structure, size, and composition of the AuxPd1-x/γ-Al2O3 catalysts. The immobilized particles consist of uniformly mixed alloys having multi-domain face-centered cubic structure with typical crystallite size of 3-6 nm. The activity of the prepared samples was examined with temperature-programmed CO oxidation reaction (TP-CO+O2). Triton X-100 surfactant is superior in a number of parameters. Among all AuxPd1-x/γ-Al2O3 catalysts tested, the one stabilized with Triton X-100 (0.4%Au-0.2%Pd@Triton X-100) was found to have the highest activity for conversion of CO into CO2.

  9. Radiation imaging

    Energy Technology Data Exchange (ETDEWEB)

    Redmayne, I.

    1986-05-21

    A detector for the detection of radiation such as X-ray radiation comprises an array of scintillation elements embedded in a sheet of radiation absorbing material. The scintillation elements are monitored individually, for example by a corresponding array of photodiodes, to build up a picture of the incident radiation. The front face of the sheet and the inner walls of the bores may be coated with a reflective material. The detector finds particular application in weld radiography. The detector may be stepped relative to the radiation source, the signals produced by the rows of the detector as they pass a predetermined point being summed.

  10. Radiation imaging

    International Nuclear Information System (INIS)

    Redmayne, Ian.

    1986-01-01

    A detector for the detection of radiation such as X-ray radiation comprises an array of scintillation elements embedded in a sheet of radiation absorbing material. The scintillation elements are monitored individually, for example by a corresponding array of photodiodes, to build up a picture of the incident radiation. The front face of the sheet and the inner walls of the bores may be coated with a reflective material. The detector finds particular application in weld radiography. The detector may be stepped relative to the radiation source, the signals produced by the rows of the detector as they pass a predetermined point being summed. (author)

  11. Radiation dosimetry and radiation biophysics

    International Nuclear Information System (INIS)

    Anon.

    1981-01-01

    Radiation dosimetry and radiation biophysics are two closely integrated programs whose joint purpose is to explore the connections between the primary physical events produced by radiation and their biological consequences in cellular systems. The radiation dosimetry program includes the theoretical description of primary events and their connection with the observable biological effects. This program also is concerned with the design and measurement of physical parameters used in theory or to support biological experiments. The radiation biophysics program tests and uses the theoretical developments for experimental design, and provides information for further theoretical development through experiments on cellular systems

  12. Radiation dosimetry and radiation biophysics

    International Nuclear Information System (INIS)

    Anon.

    1979-01-01

    Radiation dosimetry and radiation biophysics are two closely integrated programs whose joint purpose is to explore the connections between the primary physical events produced by radiation and their biological consequences in cellular systems. The radiation dosimetry program includes the theoretical description of primary events and their connection with the observable biological effects. This program also is concerned with design and measurement of those physical parameters used in the theory or to support biological experiments. The radiation biophysics program tests and makes use of the theoretical developments for experimental design. Also, this program provides information for further theoretical development through experiments on cellular systems

  13. Atoms, Radiation, and Radiation Protection

    CERN Document Server

    Turner, James E

    2007-01-01

    Atoms, Radiation, and Radiation Protection offers professionals and advanced students a comprehensive coverage of the major concepts that underlie the origins and transport of ionizing radiation in matter. Understanding atomic structure and the physical mechanisms of radiation interactions is the foundation on which much of the current practice of radiological health protection is based. The work covers the detection and measurement of radiation and the statistical interpretation of the data. The procedures that are used to protect man and the environment from the potential harmful effects of

  14. Application du groupe de renormalisation aux conducteurs organiques quasi-unidimensionnels soumis a un champ magnetique

    Science.gov (United States)

    Hubert, Laurent

    Des conducteurs organiques fortement anisotropes presentent, sous l'effet d'un champ magnetique, une etonnante variete de proprietes physiques tel que: l'effet Shubnikov-de Haas, l'effet de Haas-van-Alphen, l'existence de cascades d'ondes de densite de spin apparentees a l'effet Hall quantique, reentrance vers la phase metallique pouvant provenir d'un 'breakdown' magnetique, et tout recemment la possibilite d'un confinement charge induit par le champ magnetique. A cela s'ajoute les nombreuses caracteristiques deja apparues en variant la pression hydrostatique ou la substitution chimique: separation spin-charge, localisation de la charge, transition spin-Peierls, antiferromagnetisme itinerant ou non, supraconductivite, et l'existence d'une frontiere commune entre les phases supraconductrice et antiferromagnetique. En vue de completer la description theorique du diagramme de phase generalise des conducteurs organiques, nous adaptons et elargissons la methode du groupe de renormalisation quantique (GRQ) au cas ou le champ magnetique est non nul. On sait deja que cette methode permet de resoudre le dilemme tout particulier des composes Q-1D, soit leur capacite de produire des transitions de phase malgre leur forte anisotropie et consequemment de leur faible dimensionalite. Cette methode est deja utilisee pour decrire le diagramme de phase temperature versus pression des sels de Bechgaard, de leurs analogues souffres et mixtes. Le GRQ permet aussi de comprendre comment des systemes anisotropes comme les conducteurs organiques peuvent se comporter comme des liquides de Luttinger a haute temperature et comme des liquides de Fermi ou condenses a basse temperature. Nous montrons que l'introduction d'un champ magnetique dans un regime de saut coherent interchai ne a deux particules n'apporte que de simples corrections aux lois d'echelles dans le canal zero son, alors qu'il introduit un mecanisme de brisure de paire dans le canal Cooper. Dans le regime de saut coherent a une

  15. Du devenir de la notion de documentaire à l’ONF : des discours aux formes

    Directory of Open Access Journals (Sweden)

    Caroline Zéau

    2015-05-01

    Full Text Available Résumé La production documentaire fut toujours l’armature du mandat de l’Office national du film du Canada. Pour garantir la légitimité du cinéma auprès des instances publiques, son fondateur John Grierson a pris appui sur l’assise conceptuelle de l’Idée documentaire, une conception programmatique du cinéma qui soumettait celui-ci à la cause publique. Plus que jamais aujourd’hui, l’héritage de John Grierson est invoqué pour caractériser les valeurs associées à la mission de l’ONF, comme en témoignent les documents de communication produits par l’organisme. Plusieurs questions se posent alors : pourquoi la résurgence du lexique griersonien est-elle jugée pertinente aujourd’hui ? Et quelles sont les équivalences présupposées par ce retour aux sources ? Dans cet article, l’auteure se propose d’étudier la place et les valeurs aujourd’hui accordées à la notion de documentaire et aux objets qu’elle recouvre au sein des discours et des formes produits par l’ONF dans le cadre de la mutation technologique qui redéfinit sa mission et ses priorités depuis 2008. Ainsi seront examinées les déclinaisons terminologiques qui s’y rapportent—sur le site ONF.ca et les plans stratégiques 2008-2013 et 2013-2018—parallèlement à l’étude des formes nouvelles de documentaires produites pour les canaux de diffusion numériques qui définissent le champ de l’art interactif. Abstract Documentary production has always been central to the mandate of the National Film Board of Canada (NFB. To ensure the legitimacy of film among public authorities, its founder John Grierson built on the conceptual foundation of the Documentary Idea, a programmatic concept of cinema that places the latter at the service of the public. Today more than ever, the legacy of John Grierson is understood to characterize the values associated with the mission of the NFB, as evidenced by the institution’s communication documents

  16. Radiation carcinogenesis

    International Nuclear Information System (INIS)

    Fry, R.J.M.

    1976-01-01

    The risk of iatrogenic tumors with radiation therapy is so outweighed by the benefit of cure that estimates of risk have not been considered necessary. However, with the introduction of chemotherapy, combined therapy, and particle radiation therapy, the comparative risks should be examined. In the case of radiation, total dose, fractionation, dose rate, dose distribution, and radiation quality should be considered in the estimation of risk. The biological factors that must be considered include incidence of tumors, latent period, degree of malignancy, and multiplicity of tumors. The risk of radiation induction of tumors is influenced by the genotype, sex, and age of the patient, the tissues that will be exposed, and previous therapy. With chemotherapy the number of cells at risk is usually markedly higher than with radiation therapy. Clearly the problem of the estimation of comparative risks is complex. This paper presents the current views on the comparative risks and the importance of the various factors that influence the estimation of risk

  17. Radiation acoustics

    CERN Document Server

    Lyamshev, Leonid M

    2004-01-01

    Radiation acoustics is a developing field lying at the intersection of acoustics, high-energy physics, nuclear physics, and condensed matter physics. Radiation Acoustics is among the first books to address this promising field of study, and the first to collect all of the most significant results achieved since research in this area began in earnest in the 1970s.The book begins by reviewing the data on elementary particles, absorption of penetrating radiation in a substance, and the mechanisms of acoustic radiation excitation. The next seven chapters present a theoretical treatment of thermoradiation sound generation in condensed media under the action of modulated penetrating radiation and radiation pulses. The author explores particular features of the acoustic fields of moving thermoradiation sound sources, sound excitation by single high-energy particles, and the efficiency and optimal conditions of thermoradiation sound generation. Experimental results follow the theoretical discussions, and these clearl...

  18. Hawking radiation

    Science.gov (United States)

    Parentani, Renaud; Spindel, Philippe

    2011-12-01

    Hawking radiation is the thermal radiation predicted to be spontaneously emitted by black holes. It arises from the steady conversion of quantum vacuum fluctuations into pairs of particles, one of which escaping at infinity while the other is trapped inside the black hole horizon. It is named after the physicist Stephen Hawking who derived its existence in 1974. This radiation reduces the mass of black holes and is therefore also known as black hole evaporation.

  19. Radiation protection

    International Nuclear Information System (INIS)

    1989-01-01

    A NRPB leaflet in the 'At-a-Glance' series explains in a simple but scientifically accurate way what radiation is, the biological effects and the relative sensitivity of different parts of the human body. The leaflet then discusses radiation protection principles, radiation protection in the UK and finally the effectiveness of this radiation protection as judged by a breakdown of the total dose received by an average person in the UK, a heavy consumer of Cumbrian seafood, an average nuclear industry worker and an average person in Cornwall. (UK)

  20. GRAVITATIONAL RADIATION

    Directory of Open Access Journals (Sweden)

    Metin SALTIK

    1996-03-01

    Full Text Available According to classical electromagnetic theory, an accelerated charge or system of charges radiates electromagnetic waves. In a radio transmitter antenna charges are accelerated along the antenna and release electromagnetic waves, which is radiated at the velocity of light in the surrounding medium. All of the radio transmitters work on this principle today. In this study an analogy is established between the principles by which accelerated charge systems markes radiation and the accelerated mass system, and the systems cousing gravitational radiation are investigated.

  1. Radiation medicine

    International Nuclear Information System (INIS)

    1991-01-01

    This booklet has been produced by UKAEA and the Marie Curie Memorial Foundation to give some basic information about what radiation is and how it is used in day to day diagnosis and treatment. It will be of interest to people undergoing treatment, their relatives and friends, and anyone who wants to know more about this important area. After a brief historical introduction the booklet explains what radiation is, the natural and man-made sources of radiation, how it is produced and how X-rays are used in medical diagnosis and treatment. The radiation protection measures taken and safety standards followed are mentioned. (author)

  2. Radiation and radiation protection; Strahlung und Strahlenschutz

    Energy Technology Data Exchange (ETDEWEB)

    Bartholomaeus, Melanie (comp.)

    2017-04-15

    The publication of the Bundesamt fuer Strahlenschutz covers the following issues: (i) Human beings in natural and artificial radiation fields; (ii) ionizing radiation: radioactivity and radiation, radiation exposure and doses; measurement of ionizing radiation, natural radiation sources, artificial radiation sources, ionizing radiation effects on human beings, applied radiation protection, radiation exposure of the German population, radiation doses in comparison; (iii) non-ionizing radiation; low-frequency electric and magnetic fields, high-frequency electromagnetic fields, optical radiation; (iiii) glossary, (iv) units and conversion.

  3. Exposition orale aux nanoparticules de dioxyde de titane (TiO2) : du franchissement de l’épithélium buccal et intestinal au devenir et aux effets dans l’organisme

    OpenAIRE

    Bettini, Sarah

    2014-01-01

    Face à l’utilisation exponentielle des nanomatériaux dans des produits de consommation courante, dont l’alimentation, les conséquences pour l’homme d’une exposition quotidienne aux faibles doses de nanoparticules posent des questions de santé publique. Parmi les différentes voies d’exposition, la voie orale reste la moins documentée, alors que des nanomatériaux sont couramment utilisés comme additifs alimentaires, ou incorporés `a des emballages au contact des aliments, de l’eau, pour b´en´ef...

  4. Concepts of radiation protection

    International Nuclear Information System (INIS)

    2013-01-01

    This seventh chapter presents the concepts and principles of safety and radiation protection, emergency situations; NORM and TENORM; radiation protection care; radiation protection plan; activities of the radiation protection service; practical rules of radiation protection and the radiation symbol

  5. Radiation myelopathy

    International Nuclear Information System (INIS)

    Berlit, P.

    1987-01-01

    After a review of the world literature, the case histories of 43 patients with radiation myelopathy are analyzed. In 1 patient there was a radiation injury of the medulla oblongata, in 2, cervical, in 28, thoracic, and in 12, lumbosacral. In the medulla oblongata lesion an alternans syndrome resulted. The patients with cervical and thoracic radiation myelopathies presented with a Brown-Sequard syndrome, a spinalis anterior syndrome or a transversal syndrome with pyramidal and spinothalamic tract involvement as the most prominent signs. For this group the term 'pyramidal-spinothalamic radiation myelopathy' is proposed. In lumbosacral radiation lesions a pure anterior horn syndrome may lead to spinothalamic tract involvement and the development of a cauda conus syndrome. The clinical presentation of these cases suggests that the location of the radiation lesion is most likely the region of the conus medullaris. The most frequent initial symptom was dysesthesia; the patients complained of burning pain or a feeling of coldness. Usually the neurological deficits were progressive, in pyramidal-spinothalamic radiation myelopathy over 12 months in average, in lumbosacral radiation lesions up to 10 years. The latent period between the finish of radiation therapy and the first neurological signs was 8 months (median) in cervical and thoracic myelopathy and 33 months in lumbosacral lesions. For the entire group of 43 patients there was an inverse relationship between the radiation dose (ret) and the latent period. A positive relation could be demonstrated between the age of patients at the time of radiation therapy and the latent period. Patients simultaneously receiving cytostatic drugs presented after a longer latent period than the remaining group. (orig./MG)

  6. Radiation signatures

    International Nuclear Information System (INIS)

    McGlynn, S.P.; Varma, M.N.

    1992-01-01

    A new concept for modelling radiation risk is proposed. This concept is based on the proposal that the spectrum of molecular lesions, which we dub ''the radiation signature'', can be used to identify the quality of the causal radiation. If the proposal concerning radiation signatures can be established then, in principle, both prospective and retrospective risk determination can be assessed on an individual basis. A major goal of biophysical modelling is to relate physical events such as ionization, excitation, etc. to the production of radiation carcinogenesis. A description of the physical events is provided by track structure. The track structure is determined by radiation quality, and it can be considered to be the ''physical signature'' of the radiation. Unfortunately, the uniqueness characteristics of this signature are dissipated in biological systems in ∼10 -9 s. Nonetheless, it is our contention that this physical disturbance of the biological system eventuates later, at ∼10 0 s, in molecular lesion spectra which also characterize the causal radiation. (author)

  7. Radiation hematology

    International Nuclear Information System (INIS)

    Zherbin, E.A.; Chukhlovin, A.B.

    1989-01-01

    State-of-the-Art ofl radiation hematology and review of the problems now facing this brauch of radiobiology and nuclear medicine are presented. Distortion of division and maturation of hemopoiesis parent cells is considered as main factor of radiopathology for hematopoetic system. Problems of radiation injury and functional variation of hematopoetic microenvironment cell populations are discussed. 176 figs.; 23 figs.; 18 tabs

  8. Synchrotron radiation

    International Nuclear Information System (INIS)

    Nave, C.; Quinn, P.; Blake, R.J.

    1988-01-01

    The paper on Synchrotron Radiation contains the appendix to the Daresbury Annual Report 1987/88. The appendix is mainly devoted to the scientific progress reports on the work at the Synchrotron Radiation Source in 1987/8. The parameters of the Experimental Stations and the index to the Scientific Reports are also included in the appendix. (U.K.)

  9. Radiation oncology

    International Nuclear Information System (INIS)

    Anon.

    1977-01-01

    The Radiation Oncology Division has had as its main objectives both to operate an academic training program and to carry out research on radiation therapy of cancer. Since fiscal year 1975, following a directive from ERDA, increased effort has been given to research. The research activities have been complemented by the training program, which has been oriented toward producing radiation oncologists, giving physicians short-term experience in radiation oncology, and teaching medical students about clinical cancer and its radiation therapy. The purpose of the research effort is to improve present modalities of radiation therapy of cancer. As in previous years, the Division has operated as the Radiation Oncology Program of the Department of Radiological Sciences of the University of Puerto Rico School of Medicine. It has provided radiation oncology support to patients at the University Hospital and to academic programs of the University of Puerto Rico Medical Sciences Campus. The patients, in turn, have provided the clinical basis for the educational and research projects of the Division. Funding has been primarily from PRNC (approx. 40%) and from National Cancer Institute grants channeled through the School of Medicine (approx. 60%). Special inter-institutional relationships with the San Juan Veterans Administration Hospital and the Metropolitan Hospital in San Juan have permitted inclusion of patients from these institutions in the Division's research projects. Medical physics and radiotherapy consultations have been provided to the Radiotherapy Department of the VA Hospital

  10. Background radiation

    International Nuclear Information System (INIS)

    Arnott, D.

    1985-01-01

    The effects of background radiation, whether natural or caused by man's activities, are discussed. The known biological effects of radiation in causing cancers or genetic mutations are explained. The statement that there is a threshold below which there is no risk is examined critically. (U.K.)

  11. Radiation sickness

    International Nuclear Information System (INIS)

    Endoh, Masaru; Ishida, Yusei; Saeki, Mitsuaki

    1983-01-01

    The frequency of radiation sickness in 1,060 patients treated at our Department was 12.8 percent. It was frequent in patients with brain cancer (12 percent), whole spine cancer (47 percent), uterus cancer (28 percent), lung cancer (22 percent) and esophagus cancer (12 percent). Radiation sickness following X-irradiation was studied in its relation to patient's age, size of radiation fields, dosis and white blood cell count. However, we could not find any definite clinical feature relevant to occurrence. There are many theories published concerning the mechanism of radiation sickness. Clinical experiences have shown that radiation sickness cannot be explained by one theory alone but by several theories such as those based on psychology, stress or histamine. (author)

  12. Radiation exposure

    International Nuclear Information System (INIS)

    Dalton, L.K.

    1991-01-01

    The book gives accounts of some social and environmental impacts of the developing radiation industries, including the experiences of affected communities and individuals. Its structure is based on a division which has been made between nuclear and non-nuclear radiation sources, because they create distinctly different problems for environmental protection and so for public health policy. The emissions from electronic and electrical installations - the non-nuclear radiations - are dealt with in Part I. Emissions from radioactive substances - the nuclear radiations - are dealt with in Part II. Part III is for readers who want more detailed information about scientific basis of radiation-related biological changes and their associated health effects. 75 refs., 9 tabs., 7 figs., ills

  13. Radiation carcinogenesis

    International Nuclear Information System (INIS)

    Adams, G.E.

    1987-01-01

    In this contribution about carcinogenesis induced by ionizing radiation some radiation dose-response relationships are discussed. Curves are shown of the relation between cell survival and resp. low and high LET radiation. The difference between both curves can be ascribed to endogenous repair mechanisms in the cell. The relation between single-gen mutation frequency and the surviving fractions of irradiated cells indicates that these repairing mechanisms are not error free. Some examples of reverse dose-response relationships are presented in which decreasing values of dose-rate (LET) correspond with increasing radiation induced cell transformation. Finally some molecular aspects of radiation carcinogenesis are discussed. (H.W.). 22 refs.; 4 figs

  14. Etude de l'auto-adaptivité du filtre actif parallèle aux variations de la ...

    African Journals Online (AJOL)

    ﮫـﻋ ﺔﯾﺮﻈﻧ. -ﻚـﻋ. Résumé. Cet article s'intéresse à l'amélioration des performances du filtre actif parallèle pour s'adapter d'une manière automatique aux variations de la charge. Ce filtre est un onduleur de tension à MLI destiné à éliminer les harmoniques de courant générés par un pont redresseur triphasé non commandé ...

  15. Renforcement de la capacité à réagir aux incidents de sécurité ...

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

    Renforcement de la capacité à réagir aux incidents de sécurité informatique en Amérique latine et dans les Caraïbes ... à favoriser la mise en place d'un réseau d'équipes d'intervention en cas d'incident de sécurité informatique et à renforcer les capacités, en particulier dans les secteurs les moins développés de la région.

  16. Annual progress report of the Fontenay-aux-Roses Research Group. January 1 to December 31 1977

    International Nuclear Information System (INIS)

    1977 at Fontenay-aux-Roses was dominated by the assembly and starting up of TFR 600, whereas at Grenoble it coincided with a period of full scientific production on Petula and Wega. On TFR 600 a study was made on discharges in the absence of a conducting shell and on plasma purity. Tokamak physics covered the analysis of the mechanism of disruptions and the dynamics of impurities on TFR 400, and the neutral injection (circular periplasmatron). Simultaneously the heating experiments and the diagnostics for TFR 600 were actively prepared, as well as the Torre II project [fr

  17. Marketers as Innovators: how ethnic marketing revisits ethnicity Marketing ethnique et innovation aux États-Unis

    OpenAIRE

    Marie-Christine Pauwels

    2009-01-01

    L’innovation aux États-Unis est ici vue sous un angle social et culturel. Il ne s’agit plus d’étudier l’innovation technologique, mais l’innovation en matière de produit. L’article aborde la création de valeur à travers la variable ethnique dans le domaine de la vente, du marketing et de la publicité. Les nouvelles tendances en matière d’ethno-marketing sont analysées, en particulier la manière dont les professionnels utilisent la notion d’ethnicité pour vendre des produits de consommation co...

  18. Epidémiologie moléculaire du rotavirus du groupe A associé aux ...

    African Journals Online (AJOL)

    Le rotavirus est la première cause de gastroentérites grave chez les enfants de moins de 5 ans. La gravité et la mortalité de la maladie sont majorées dans les pays à revenus faibles d'Asie du sud et d'Afrique subsaharienne. Au Cameroun, la forte prévalence des rotaviroses, associées aux spécificités génotypiques locales ...

  19. Genome-wide analysis of Aux/IAA gene family in Solanaceae species using tomato as a model.

    Science.gov (United States)

    Wu, Jian; Peng, Zhen; Liu, Songyu; He, Yanjun; Cheng, Lin; Kong, Fuling; Wang, Jie; Lu, Gang

    2012-04-01

    Auxin plays key roles in a wide variety of plant activities, including embryo development, leaf formation, phototropism, fruit development and root initiation and development. Auxin/indoleacetic acid (Aux/IAA) genes, encoding short-lived nuclear proteins, are key regulators in the auxin transduction pathway. But how they work is still unknown. In order to conduct a systematic analysis of this gene family in Solanaceae species, a genome-wide search for the homologues of auxin response genes was carried out. Here, 26 and 27 non redundant AUX/IAAs were identified in tomato and potato, respectively. Using tomato as a model, a comprehensive overview of SlIAA gene family is presented, including the gene structures, phylogeny, chromosome locations, conserved motifs and cis-elements in promoter sequences. A phylogenetic tree generated from alignments of the predicted protein sequences of 31 OsIAAs, 29 AtIAAs, 31 ZmIAAs, and 26 SlIAAs revealed that these IAAs were clustered into three major groups and ten subgroups. Among them, seven subgroups were present in both monocot and dicot species, which indicated that the major functional diversification within the IAA family predated the monocot/dicot divergence. In contrast, group C and some other subgroups seemed to be species-specific. Quantitative real-time PCR (qRT-PCR) analysis showed that 19 of the 26 SlIAA genes could be detected in all tomato organs/tissues, however, seven of them were specifically expressed in some of tomato tissues. The transcript abundance of 17 SlIAA genes were increased within a few hours when the seedlings were treated with exogenous IAA. However, those of other six SlIAAs were decreased. The results of stress treatments showed that most SIIAA family genes responded to at least one of the three stress treatments, however, they exhibited diverse expression levels under different abiotic stress conditions in tomato seedlings. SlIAA20, SlIAA21 and SlIAA22 were not significantly influenced by stress

  20. Transmissions radio haut débit sur fibres optiques appliquées aux transports terrestres

    OpenAIRE

    LOUM, D

    2009-01-01

    De nos jours, les liaisons par fibres optiques monomodes ou multimodes équipent de plus en plus des bâtiments, des lieux et sites de transports publics (gares, aéroports, autoroutes, ports ou plateformes multimodales). Les développements et tests de transmission radio sur fibre utilisant divers standards radio ont été effectués pour des accès aux services. Les débits restent limités à ceux définis par les normes correspondantes et donc très faibles vis-à-vis des possibilités offertes par la f...

  1. Apport du rayonnement synchrotron infrarouge aux techniques de microscopie en champ proche optique

    OpenAIRE

    Silveira, Miguel

    2009-01-01

    My project is concerned with the development of an infrared apertureless scanning near-eld optical microscope (SNOM) that will use the synchrotron radiation of the ESRF as source of infrared light. This radiation has two main particularities well-suited to spectroscopic studies: this is a white source of light covering the near infrared band from 5 to 15 microns where tunable laser sources are still under development and it is very bright and stable, both in time and space. Once developed, th...

  2. Le recours aux archives judiciaires pour étudier les habitudes de sommeil

    Directory of Open Access Journals (Sweden)

    Guillaume Garnier

    2009-10-01

    Full Text Available Les archives judiciaires possèdent de nombreux attraits, et certains sont parfois insoupçonnés. Les faits relatés dans les actes d’accusation par exemple, mais aussi les déclarations de témoins recèlent de petits détails sur les habitudes de sommeil qui passent souvent inaperçus aux yeux des historiens. Dans un corpus très large (du XVIIIe au xixe siècle on peut ainsi tenter de comprendre les logiques de sommeil : heures de coucher et lever, durée du sommeil, l’apparente vulnérabilité du repos nocturne, les déviances nocturnes, le lieu de sommeil. Mais dans une vue plus globale, les archives aident aussi à déterminer les rythmes nocturnes et notamment la place qu’y tient le sommeil. Les contraintes sociales et politiques, la dureté du travail et de la vie, l’importance de la religion transparaissent aussi pour former une culture spécifique du sommeil préindustriel.Judiciary records have many appealing aspects, some of which one would not suspect. What is related in indictment documents for instance, as well as in evidence statements, contains small details about sleeping habits that often go unnoticed by historians. Out of a very large corpus (from the xviiith till the xixth century, one can try and work out the rationale behind sleep: at what time people go to sleep or wake up, for how long, how vulnerable night sleep seems to be, nocturnal deviances, or where people sleep. But to a larger extent, records also help to determine nocturnal rhythms and more specifically the place that sleep holds in them. Social and political constraints, harshness of working and living conditions, the importance of religion, all show through and convey a specific culture of pre-industrial sleep.

  3. Radiation therapy

    International Nuclear Information System (INIS)

    Bader, J.L.; Glatstein, E.

    1987-01-01

    The radiation oncologist encounters the critically ill immunosuppressed patient in four settings. First, the newly diagnosed cancer patient presents for initial evaluation and treatment, with immunosuppression from the cancer itself, malnutrition, concomitant infectious disease, prior drug or alcohol abuse or other medical problems. Second, the previously treated cancer patient presents with metastatic or recurrent primary cancer causing local symptoms. Immune dysfunction in this setting may be due to prior chemotherapy and/or radiation as well as any of the original factors. Third, the patient previously treated with radiation presents with a life-threatening problem possibly due to complications of prior therapy. In this setting, the radiation oncologist is asked to evaluate the clinical problem and to suggest whether radiation might be causing part or all of the problem and what can be done to treat these sequelae of radiation. Fourth, the patient with a benign diagnosis (not cancer) is seen with a problem potentially emeliorated by radiation (e.g., kidney transplant rejection, preparation for transplant, or intractable rheumatoid arthritis). This chapter reviews these four issues and presents clinical and radiobiologic principles on which recommendations for therapy are based

  4. Beneficial radiation?

    International Nuclear Information System (INIS)

    Roth, E.; Feinendegen, E.

    1996-01-01

    Ionizing radiation is harmful and may cause cancer, as is well known. However, again and again, low doses of ionizing radiation, under certain conditions, are said to have beneficial effects on human health and, in particular, may reduce the cancer rate. This effect, which is discussed controversially in the technical and scientific literature, is called 'hormesis'. Studies of possible positive effects of ionizing radiation are becoming increasingly more important in scientific research. The article is an attempt to show, by the model case of cancer, under what conditions such positive health effects can occur, at least in principle, and will also contain rough plausibility assessments of the existence of such conditions. Aspects not covered include other existing or presumed positive biological effects of ionizing radiation, such as acceleration of growth, or general increase in the life expectancy of organisms. Also genetic damage will not be discussed in greater detail, despite the existence of some parallels with cancer, both cases constituting lesions to the genetic material of the cells, in one case, germ cells and, in the case of cancer, somatic cells. Also, acute radiation effect will be excluded which occur only at high radiation doses and, as such, always cause damage which, in therapeutic application to cancer, may again be lifesaving. It should be emphasized that the article is limited to a greatly restricted range of biological effects of ionizing radiation which, consequently, are of limited value for overall assessment. (orig.) [de

  5. Radiation safety

    International Nuclear Information System (INIS)

    1996-04-01

    Most of the ionizing radiation that people are exposed to in day-to-day activities comes from natural, rather than manmade, sources. The health effects of radiation - both natural and artificial - are relatively well understood and can be effectively minimized through careful safety measures and practices. The IAEA, together with other international and expert organizations, is helping to promote and institute Basic Safety Standards on an international basis to ensure that radiation sources and radioactive materials are managed for both maximum safety and human benefit

  6. Radiation physics

    International Nuclear Information System (INIS)

    Nam, Sang Hui

    1991-02-01

    This book deals with radiation physics, which introduces atomic theory and an atomic nucleus of materials, conception of an atom and materials, wave and particle, X ray generation and character, a radioactive element and change law, nature of radioactivity, neutron rays, fission, alpha collapse and beta collage and a neutrino collapse of artificial radioactivity such as collapse of artificial nucleus and artificial radioactivity and radiative capture, interaction with materials like interaction between a charged particle and materials and interaction among X-ray, r-ray and materials, radiation of quantity and unit and a charged particle accelerator.

  7. Synchrotron radiation

    CERN Document Server

    Kunz, C

    1974-01-01

    The production of synchrotron radiation as a by-product of circular high-energy electron (positron) accelerators or storage rings is briefly discussed. A listing of existing or planned synchrotron radiation laboratories is included. The following properties are discussed: spectrum, collimation, polarization, and intensity; a short comparison with other sources (lasers and X-ray tubes) is also given. The remainder of the paper describes the experimental installations at the Deutsches Elektronen-Synchrotron (DESY) and DORIS storage rings, presents a few typical examples out of the fields of atomic, molecular, and solid-state spectroscopy, and finishes with an outlook on the use of synchrotron radiation in molecular biology. (21 refs).

  8. Radiation dosimeter

    International Nuclear Information System (INIS)

    Fox, R.J.

    1983-01-01

    A radiation detector readout circuit is provided which produces a radiation dose-rate readout from a detector even though the detector output may be highly energy dependent. A linear charge amplifier including an output charge pump circuit amplifies the charge signal pulses from the detector and pumps the charge into a charge storage capacitor. The discharge rate of the capacitor through a resistor is controlled to provide a time-dependent voltage which when integrated provides an output proportional to the dose-rate of radiation detected by the detector. This output may be converted to digital form for readout on a digital display

  9. Quelques exemples d'application aux composites stratitfiés de la théorie Bending-Gradient pour les plaques

    OpenAIRE

    Lebée , Arthur; Sab , Karam

    2011-01-01

    International audience; Ce travail présente l'application aux composites fibrés d'une nouvelle théorie de plaque. Ce modèle destiné aux plaques épaisses et anisotropes utilise les six inconnues statiques de la theorie de Kirchhoff-Love auxquelles sont ajoutées six nouvelles inconnues représentant le gradient dumoment de flexion. Nommé théorie Bending-Gradient, ce nouveaumodèle peut être considéré comme une extension aux plaques hétérogènes dans l'épaisseurs du modèle de Reissner-Mindlin ; ce ...

  10. L’éducation aux médias : contributions, pratiques et perspectives de recherche en sciences de la communication

    OpenAIRE

    Landry, Normand; Basque, Joëlle

    2015-01-01

    Cet article positionne l’éducation aux médias à la fois comme champ et comme objet d’étude privilégié de mise en application de perspectives critiques en communication et en éducation. À cet égard, il synthétise et problématise le champ théorique de l’éducation aux médias et en identifie les spécificités, les visées et les difficultés. De surcroît, il présente de manière critique le concept de « littératie médiatique », principale proposition théorique de l’éducation aux médias. Finalement, c...

  11. Barbara Laborde, De l’enseignement du cinéma à l’éducation aux médias

    OpenAIRE

    Mathy, Adrien

    2017-01-01

    L’éducation aux médias est-elle un effet de mode, ou un projet ambitieux, porteur de multiples promesses ? Qu’auraient à gagner l’enseignement du cinéma et l’éducation aux médias à être, sinon assimilés, du moins rapprochés ? Ces questionnements jalonnent l’ouvrage de Barbara Laborde, dont la contribution déconstruit patiemment les discours sur l’enseignement du cinéma et l’éducation aux médias. Dans ce travail d’envergure, Laborde développe un discours riche, ponctué d’exemples et d’encadrés...

  12. L'inégalité des territoires insulaires de la Caraïbe face aux menaces volcaniques

    Directory of Open Access Journals (Sweden)

    Thierry Lesales

    2008-02-01

    Full Text Available Les îles de la Caraïbe orientale sont particulièrement exposées aux éruptions volcaniques. L’ensemble des Petites Antilles comprend en effet une vingtaine de volcans actifs, aux styles éruptifs parmi les plus dangereux et destructeurs. La définition de facteurs de vulnérabilité autorise des comparaisons et un classement des îles en fonction de leur niveau d’exposition. Cette approche permet d’attirer l’attention sur la nécessité d’une gestion proactive des risques volcaniques en contexte insulaireThe Eastern Caribbean islands are particularly exposed to volcanic eruptions. The Lesser Antilles arc indeed includes a score of active volcanoes, whose eruptive styles are among the most dangerous and destructive. The definition of vulnerability factors leads to some comparisons and a classification of the islands according to their level of exposure. This approach draws the attention to the imperative need for a proactive management of the volcanic risks in this insular context.

  13. Accessibilité aux emplois en France : le rôle de la distance à la ville

    Directory of Open Access Journals (Sweden)

    Mohamed Hilal

    2004-12-01

    Full Text Available L'objet de cet article est de modéliser les niveaux d’accessibilité potentielle aux emplois des communes françaises selon le rôle de la distance à la ville. Pour ce faire, nous présentons, tout d’abord, un modèle d’accessibilité et la méthode mise en œuvre pour calculer de façon systématique, à partir des données du réseau routier, une matrice des plus courts chemins, mesurés en temps, entre les communes françaises. Ensuite, dans la deuxième partie, ces distances sont intégrées dans le modèle d’accessibilité retenu afin de mesurer la disponibilité potentielle aux emplois selon la distance au pôle urbain le plus proche et selon les principales catégories d’espace du zonage en aires urbaines et de son complément rural. Enfin, la mesure d’accessibilité potentielle est comparée à plusieurs mesures d’accessibilité empirique.

  14. Genome-wide survey of Aux/IAA gene family members in potato (Solanum tuberosum): Identification, expression analysis, and evaluation of their roles in tuber development

    International Nuclear Information System (INIS)

    Gao, Junpeng; Cao, Xiaoli; Shi, Shandang; Ma, Yuling; Wang, Kai; Liu, Shengjie; Chen, Dan; Chen, Qin; Ma, Haoli

    2016-01-01

    The Auxin/indole-3-acetic acid (Aux/IAA) genes encode short-lived nuclear proteins that are known to be involved in the primary cellular responses to auxin. To date, systematic analysis of the Aux/IAA genes in potato (Solanum tuberosum) has not been conducted. In this study, a total of 26 potato Aux/IAA genes were identified (designated from StIAA1 to StIAA26), and the distribution of four conserved domains shared by the StIAAs were analyzed based on multiple sequence alignment and a motif-based sequence analysis. A phylogenetic analysis of the Aux/IAA gene families of potato and Arabidopsis was also conducted. In order to assess the roles of StIAA genes in tuber development, the results of RNA-seq studies were reformatted to analyze the expression patterns of StIAA genes, and then verified by quantitative real-time PCR. A large number of StIAA genes (12 genes) were highly expressed in stolon organs and in during the tuber initiation and expansion developmental stages, and most of these genes were responsive to indoleacetic acid treatment. Our results suggested that StIAA genes were involved in the process of tuber development and provided insights into functional roles of potato Aux/IAA genes. - Highlights: • A systematic analysis of the potato AUX/IAA gene family were performed. • StIAA genes were related to auxin perception and signal transduction. • Candidate StIAA genes likely related to tuber initiation and expansion were screened.

  15. Genome-wide survey of Aux/IAA gene family members in potato (Solanum tuberosum): Identification, expression analysis, and evaluation of their roles in tuber development

    Energy Technology Data Exchange (ETDEWEB)

    Gao, Junpeng [State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A& F University, Yangling, Shaanxi 712100 (China); Innovation Experimental College, Northwest A& F University, Yangling, Shaanxi 712100 (China); Cao, Xiaoli; Shi, Shandang [State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A& F University, Yangling, Shaanxi 712100 (China); Ma, Yuling [State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A& F University, Yangling, Shaanxi 712100 (China); Innovation Experimental College, Northwest A& F University, Yangling, Shaanxi 712100 (China); Wang, Kai; Liu, Shengjie [State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A& F University, Yangling, Shaanxi 712100 (China); Chen, Dan [School of Life Sciences and Technology, Xidian University, Xi' an, Shaanxi 710071 (China); Chen, Qin [State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A& F University, Yangling, Shaanxi 712100 (China); Ma, Haoli, E-mail: mahaoli@nwsuaf.edu.cn [State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A& F University, Yangling, Shaanxi 712100 (China)

    2016-03-04

    The Auxin/indole-3-acetic acid (Aux/IAA) genes encode short-lived nuclear proteins that are known to be involved in the primary cellular responses to auxin. To date, systematic analysis of the Aux/IAA genes in potato (Solanum tuberosum) has not been conducted. In this study, a total of 26 potato Aux/IAA genes were identified (designated from StIAA1 to StIAA26), and the distribution of four conserved domains shared by the StIAAs were analyzed based on multiple sequence alignment and a motif-based sequence analysis. A phylogenetic analysis of the Aux/IAA gene families of potato and Arabidopsis was also conducted. In order to assess the roles of StIAA genes in tuber development, the results of RNA-seq studies were reformatted to analyze the expression patterns of StIAA genes, and then verified by quantitative real-time PCR. A large number of StIAA genes (12 genes) were highly expressed in stolon organs and in during the tuber initiation and expansion developmental stages, and most of these genes were responsive to indoleacetic acid treatment. Our results suggested that StIAA genes were involved in the process of tuber development and provided insights into functional roles of potato Aux/IAA genes. - Highlights: • A systematic analysis of the potato AUX/IAA gene family were performed. • StIAA genes were related to auxin perception and signal transduction. • Candidate StIAA genes likely related to tuber initiation and expansion were screened.

  16. Radiating confidence

    International Nuclear Information System (INIS)

    Rush, P.

    1988-01-01

    Radiation monitoring systems for operators handling radioactive wastes are described. These include a personnel monitoring system which is suitable for small groups (ie as few as 50) of personnel. The use of microelectronics enable facilities such as automatic personal dose recording with three accumulative registers and automatic reporting of exceeded dose limits. At a controlled entrance the user is identified with a personal identification number. Exit is then also monitored. The use of pocket dosimeters increase the flexibility of this system. In another system a 'rotary man lock' only allows exit from the radiation controlled zone when satisfactory radiation checks have been made. The radiation and security checks available with this system are described. A 'sack monitor' for low level wastes contained in plastic bags is illustrated. (U.K.)

  17. Radiation curing

    International Nuclear Information System (INIS)

    Wendrinsky, J.

    1987-04-01

    In the beginning of the seventies the two types of radiation sources applied in industrial processes, electron radiation and UV, had been given rather optimistic forecasts. While UV could succeed in the field of panel and film coating, electron radiation curing seems to gain success in quite new fields of manufacturing. The listing of the suggested applications of radiation curing and a comparison of both advantages and disadvantages of this technology are followed by a number of case studies emphasizing the features of these processes and giving some examplary calculations. The data used for the calculations should provide an easy calculation of individual manufacturing costs if special production parameters, investment or energy costs are employed. (Author)

  18. Synchrotron Radiation

    International Nuclear Information System (INIS)

    Asfour, F.I

    2000-01-01

    Synchrotron light is produced by electron accelerators combined with storage rings. This light is generated over a wide spectral region; from infra-red (IR) through the visible and vacuum ultraviolet (VUV), and into the X-ray region. For relativistic electrons (moving nearly with the speed of light), most radiation is concentrated in a small cone with an opening angle of 1/gamma(some 0.1 to 1 milliradian),where gamma is the electron energy in units of rest energy (typically 10 3 -10 4 ). In synchrotron radiation sources (storage rings) highly relativistic electrons are stored to travel along a circular path for many hours. Radiation is caused by transverse acceleration due to magnetic forces(bending magnets). The radiation is emitted in pulses of 10-20 picosecond, separated by some 2 nanosecond or longer separation

  19. Infrared radiation

    International Nuclear Information System (INIS)

    Moss, C.E.; Ellis, R.J.; Murray, W.E.; Parr, W.H.

    1989-01-01

    All people are exposed to IR radiation from sunlight, artificial light and radiant heating. Exposures to IR are quantified by irradiance and radiant exposure to characterize biological effects on the skin and cornea. However, near-IR exposure to the retina requires knowledge of the radiance of the IR source. With most IR sources in everyday use the health risks are considered minimal; only in certain high radiant work environments are individuals exposed to excessive levels. The interaction of IR radiation with biological tissues is mainly thermal. IR radiation may augment the biological response to other agents. The major health hazards are thermal injury to the eye and skin, including corneal burns from far-IR, heat stress, and retinal and lenticular injury from near-IR radiation. 59 refs, 13 figs, 2 tabs

  20. Radiation shield

    International Nuclear Information System (INIS)

    Hosoya, Yasuaki

    1993-01-01

    In the present invention, the thickness of the radiation shields is minimized to save the quantity of shields thereby utilizing spaces in a facility effectively. That is, the radiation shields of the present invention comprise first and second shields forming stepwise gaps. They are disposed between a high dose region and a low dose region. The first and second shields have a feature in that the thickness thereof can be set to a size capable of shielding the gaps in accordance with the strength of the radiation source to be shielded. With such a constitution, the thickness of the shields of the radiation processing facility can be minimized. Accordingly, the quantity of the shields can be greatly saved. Spaces in the facility can be utilized effectively. (I.S.)

  1. Synchrotron radiation

    International Nuclear Information System (INIS)

    Helliwell, J.R.; Walker, R.P.

    1985-01-01

    A detailed account of the research work associated with the Synchrotron Radiation Source at Daresbury Laboratory, United Kingdom, in 1984/85, is presented in the Appendix to the Laboratory's Annual Report. (U.K.)

  2. Radiation sickness

    Science.gov (United States)

    ... GO About MedlinePlus Site Map FAQs Customer Support Health Topics Drugs & Supplements Videos & Tools Español You Are Here: Home → Medical Encyclopedia → Radiation sickness URL of this page: //medlineplus.gov/ency/article/ ...

  3. Radiation damage

    CERN Document Server

    Heijne, Erik H M; CERN. Geneva

    1998-01-01

    a) Radiation damage in organic materials. This series of lectures will give an overview of radiation effects on materials and components frequently used in accelerator engineering and experiments. Basic degradation phenomena will be presented for organic materials with comprehensive damage threshold doses for commonly used rubbers, thermoplastics, thermosets and composite materials. Some indications will be given for glass, scintillators and optical fibres. b) Radiation effects in semiconductor materials and devices. The major part of the time will be devoted to treat radiation effects in semiconductor sensors and the associated electronics, in particular displacement damage, interface and single event phenomena. Evaluation methods and practical aspects will be shown. Strategies will be developed for the survival of the materials under the expected environmental conditions of the LHC machine and detectors. I will describe profound revolution in our understanding of black holes and their relation to quantum me...

  4. Radiation sensors

    International Nuclear Information System (INIS)

    Wykes, J.S.; Adsley, I.

    1981-01-01

    Radiation detectors, suitable for use in industrial environments, eg coal mines are claimed. At least two scintillation crystals are mounted on a resilient support material, preferably silicone rubber. The sensors are both robust and compact. (U.K.)

  5. Radiation safety

    International Nuclear Information System (INIS)

    Goetz, B.B.; Murphy, C.H.

    1987-01-01

    In medicine, as in other fields of scientific endeavor, the development of advanced and specialized techniques has resulted in increased hazards for employees. However, by possessing both an appreciation of the proper use of factors that regulate radiation exposure around radiology equipment and a knowledge of the biologic effects of radiation, which can include possible genetic and somatic consequences, it is possible to maximize the usefulness of these valuable procedures while minimizing the risk to medical personnel involved with patient care

  6. Radiation Transport

    Energy Technology Data Exchange (ETDEWEB)

    Urbatsch, Todd James [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2015-06-15

    We present an overview of radiation transport, covering terminology, blackbody raditation, opacities, Boltzmann transport theory, approximations to the transport equation. Next we introduce several transport methods. We present a section on Caseology, observing transport boundary layers. We briefly broach topics of software development, including verification and validation, and we close with a section on high energy-density experiments that highlight and support radiation transport.

  7. Synchrotron radiation

    International Nuclear Information System (INIS)

    Norman, D.; Walker, R.P.; Durham, P.J.; Ridley, P.A.

    1986-01-01

    The paper on synchrotron radiation is the appendix to the Daresbury (United Kingdom) annual report, 1985/86. The bulk of the volume is made up of the progress reports for the work carried out during the year under review using the Synchrotron Radiation Source (SRS) at Daresbury. The Appendix also contains: the scientific programmes at the the SRS, progress on beamlines, instrumentation and computing developments, and activities connected with accelerator development. (U.K.)

  8. Radiation protection

    International Nuclear Information System (INIS)

    Koelzer, W.

    1976-01-01

    The lecture is divided into five sections. The introduction deals with the physical and radiological terms, quantities and units. Then the basic principles of radiological protection are discussed. In the third section attention is paid to the biological effects of ionizing radiation. The fourth section deals with the objectives of practical radiological protection. Finally the emergency measures are discussed to be taken in radiation accidents. (HP) [de

  9. Synchrotron radiation

    International Nuclear Information System (INIS)

    Poole, M.W.; Lea, K.R.

    1982-01-01

    A report is given on the work involving the Synchrotron Radiation Division of the Daresbury Laboratory during the period January 1981 - March 1982. Development of the source, beamlines and experimental stations is described. Progress reports from individual investigators are presented which reveal the general diversity and interdisciplinary nature of the research which benefits from access to synchrotron radiation and the associated facilities. Information is given on the organisation of the Division and publications written by the staff are listed. (U.K.)

  10. Radiation Protection

    International Nuclear Information System (INIS)

    Loos, M.

    2001-01-01

    Major achievements of SCK-CEN's Radiation Protection Department in 2000 are described. The main areas for R and D of the department remain neutron dosimetry and neutron activation analysis, safeguards information handling and non-destructive assay techniques. Further activities include low-level radioactivity measurements in environmental and biological samples and radiation protection research. Finally, achievements in decision strategy research and social sciences in nuclear research are reported

  11. Conservation of salivary function and new external head and neck radiation techniques.

    Science.gov (United States)

    Thariat, J; Guevara, N; Marcy, P-Y; Bensadoun, R J; Bardet, E; Giraud, P

    2010-12-01

    New radiation therapy techniques seek to adapt dose distribution to three-dimensional tumor geometry, so as to deliver the lowest possible dose to normal tissue and at-risk organs. This is expected to enhance locoregional control and survival and to reduce complications and thereby improve quality of life. Post-radiation xerostomia significantly deteriorates quality of life. New external radiation techniques (such as intensity-modulated conformal radiation therapy, RapidArc VMAT arc therapy, tomotherapy, CyberKnife(®), protontherapy, use of carbon ions) applicable in ENT are reviewed. Preliminary data show interesting results in terms of salivary function with highly conformal techniques. In France, assessment is ongoing, financed under the Health Ministry's "Support for Expensive Innovatory Techniques" scheme (STIC [Soutien aux techniques innovantes coûteuses]), as routine use is growing rapidly. Copyright © 2010 Elsevier Masson SAS. All rights reserved.

  12. Cinetique de la nucleation binaire non-isotherme et de la condensation binaire aux conditions dynamiques

    Science.gov (United States)

    Djikaev, Yuri

    La présente thèse est consacrée à la théorie de la condensation binaire. Premièrement, nous considérons la thermodynamique de la nucléation binaire, en nous concentrant sur l'énergie libre de formation d'une goutte et la distribution d'équilibre des gouttes, qui est essentielle pour la vitesse théorique de nucléation et dont le choix n'est toutefois pas unique. Une nouvelle distribution d'équilibre est proposée. Deuxièmement, nous développons la théorie cinétique de la nucléation binaire non-isotherme. Cette théorie traite de l'influence des effets thermiques sur la condensation binaire qui sont causés par la chaleur de condensation. Les molécules du mélange de vapeurs absorbées par une goutte de solution binaire lui transmettent de la chaleur de condensation, tandis que les molécules émises par la goutte lui enlèvent une telle chaleur. La température moyenne de la goutte s'accroît au fur et à mesure qu'elle grandit. Cet échauffement des gouttes croissantes diminue la vitesse de nucléation et influence d'autres caractéristiques du processus. Dans le cas où les chaleurs de condensation sont très petites par rapport à la fluctuation efficace de l'énergie d'une goutte l'équation cinétique peut être réduite à celle de Fokker et Planck. L'analyse de l'équation cinétique permet de déterminer la hiérarchie des échelles de temps de la nucléation binaire non-isotherme. Cela rend possible de séparer et décrire analytiquement l'étape de relaxation thermique pendant laquelle la distribution des gouttes selon la température s'approche d'une gaussienne, alors que leur distribution selon les nombres de molécules ne change guère. Finalement, nous étudions la condensation binaire isotherme aux conditions dynamiques. Dans ce cas la formation et la croissance des gouttes se passent en même temps que la métastabilité du mélange de vapeurs croît graduellement, atteint son maximum et décroît. C'est ainsi que la condensation

  13. Brain radiation - discharge

    Science.gov (United States)

    Radiation - brain - discharge; Cancer-brain radiation; Lymphoma - brain radiation; Leukemia - brain radiation ... Decadron) while you are getting radiation to the brain. It may make you hungrier, cause leg swelling ...

  14. Sensibilité aux antibiotiques des souches destaphylococcus aureus communautaires dans la région de Nouakchott (Mauritanie)

    Science.gov (United States)

    Salem, Mohamed Lemine Ould; Ghaber, Sidi Mohamed; Baba, Sidi El Wafi Ould; Maouloud, Mohamed Mahmoud Ould

    2016-01-01

    Introduction Staphylocoque aureus reste un pathogène majeur de l'homme causant des infections très diverses, cutanées, urinaires, pulmonaires ainsi que des septicémies. L'objectif de ce travail est d'évaluer la sensibilité des souches communautaires de Staphylococcus aureus isolées dans différents produits pathologiques vis-à-vis des principaux antibiotiques utilisés, dans la région de Nouakchott (Mauritanie). Méthodes Il s'agit d'une étude rétrospective réalisée sur 281 souches de Staphylococus aureus isolées entre Janvier 2014 et Août 2015 au laboratoire du Centre Hospitalier National et aux deux laboratoires privés de la ville de Nouakchott, dans différents produits pathologiques des patients non hospitalisés. La sensibilité aux antibiotiques a été déterminée par la méthode de diffusion de disques en milieu gélosé de Mueller Hinton selon les recommandations du CA-SFM. Résultats Le taux de résistance à la pénicilline G était élevé (96 à 100%). Le taux de SARM communautaires se situe entre 25 et 26% dans les suppurations, de 34,3% dans les ECBU et de 28% dans les spermocultures. La résistance aux Macrolides-Lincosamyne-Streptogramines (MLS), donnant le phénotype MLSb inductible, était retrouvée dans 6% des souches urinaires et 27% des souches isolées à partir des suppurations. L'activité des aminosides est variable, l'amikacine était active sur toutes les souches. L'activité du cotrimoxazol est faible (77% de résistance) et aucune résistance à la vancomycine n'a été notée. Conclusion L'activité de la Pénicilline G sur les souches de Staphylococcus aureus isolées dans la région de Nouakchott est quasi nulle et le taux de SARM communautaire est important atteignant jusqu'à 34%. Ceci pourrait être expliqué par l'usage anarchique de ces molécules dans notre pays. PMID:28154631

  15. Directional radiation detectors

    Science.gov (United States)

    Dowell, Jonathan L.

    2017-09-12

    Directional radiation detectors and systems, methods, and computer-readable media for using directional radiation detectors to locate a radiation source are provided herein. A directional radiation detector includes a radiation sensor. A radiation attenuator partially surrounds the radiation sensor and defines an aperture through which incident radiation is received by the radiation sensor. The aperture is positioned such that when incident radiation is received directly through the aperture and by the radiation sensor, a source of the incident radiation is located within a solid angle defined by the aperture. The radiation sensor senses at least one of alpha particles, beta particles, gamma particles, or neutrons.

  16. Tidal radiation

    International Nuclear Information System (INIS)

    Mashhoon, B.

    1977-01-01

    The general theory of tides is developed within the framework of Einstein's theory of gravitation. It is based on the concept of Fermi frame and the associated notion of tidal frame along an open curve in spacetime. Following the previous work of the author an approximate scheme for the evaluation of tidal gravitational radiation is presented which is valid for weak gravitational fields. The emission of gravitational radiation from a body in the field of a black hole is discussed, and for some cases of astrophysical interest estimates are given for the contributions of radiation due to center-of-mass motion, purely tidal deformation, and the interference between the center of mass and tidal motions

  17. Ionizing radiations

    International Nuclear Information System (INIS)

    2009-01-01

    After having recalled some fundamental notions and measurement units related to ionizing radiations, this document describes various aspects of natural and occupational exposures: exposure modes and sources, exposure levels, biological effects, health impacts. Then, it presents prevention principles aimed at, in an occupational context of use of radiation sources (nuclear industry excluded), reducing and managing these exposures: risk assessment, implementation of safety from the front end. Some practical cases illustrate the radiation protection approach. The legal and regulatory framework is presented: general notions, worker exposure, measures specific to some worker categories (pregnant and breast feeding women, young workers, temporary workers). A last part describes what is to be done in case of incident or accident (dissemination of radioactive substances from unsealed sources, anomaly occurring when using a generator or a sealed source, post-accident situation)

  18. Ionising radiation

    International Nuclear Information System (INIS)

    Anon.

    1982-01-01

    The law covering ionising radiations in Belgium is summarised under the headings: the outline law of 19 March 1958; the General Regulation for the protection of the population and workers against the danger of ionising radiation (introduction; application; the control of classified establishments; organisation of general protection; importation, transit and distribution of radioactive substances; transport of radioactive substances; nuclear propulsion; ionising radiation in human or veterinary medicine; prohibitions and authorisations; exceptional measures; monitoring of the national territory and of the population as a whole; the approval of experts, organisations and doctors; monitoring; the public company for the management of radioactive waste and fissile materials); the law of 4 August 1955 concerning state security in the field of nuclear energy; civil responsibility; the Interministerial Commission on Nuclear Safety and State Security in the Nuclear Field; the non-proliferation of nuclear arms. (U.K.)

  19. Radiation sensor

    International Nuclear Information System (INIS)

    Brown, W.L.; Geronime, R.L.

    1977-01-01

    Radiation sensor and thermocouple, respectively, which can be used for reactor in-core instrumentation. The radiation sensor consists of an inconel conductor wire and rhodium emitter wire, the thermocouple of two intertwined alumel or chromel wires. Both are arranged in the center of a metal tube relative to which they are separated by an insulator made of SiO 2 fibers. This insulator is first introduced as a loose fabric between the radiation sensor and the thermocouple, respectively, and the metal tube and then compacted to a density of 35-73% of pure SiO 2 by drawing the tube. There is no need for soldering or welding. The insulation resistivity at room temperature ist between 10 14 and 10 15 ohms. (ORU) [de

  20. Radiofrequency radiation

    International Nuclear Information System (INIS)

    Elder, J.A.; Czerski, P.A.; Stuchly, M.A.; Mild, K.H.; Sheppard, A.R.

    1989-01-01

    High-level radiofrequency radiation is a source of thermal energy that carries all of the known implications of heating for biological systems, including burns, temporary and permanent changes in reproduction, cataracts, and death. In general, no changes in chromosomes, DNA or the reproductive potential of animals exposed to RF radiation have been reported in the absence of significant rises in temperature, though there are limited data on DNA and chromosomal changes at non-thermal levels. Human data are currently limited and do not provide adequate information about the relationship between prolonged low-level RF radiation exposure and increased mortality or morbidity, including cancer incidence. In epidemiological studies and clinical reports of RF effects in man, the problems of quantification are numerous and include uncertainties about ''dose'', health effects, latent periods, dose-response relationships, and interactions with other physical or chemical agents. 228 refs, 6 figs, 2 tabs

  1. Cherenkov radiation

    International Nuclear Information System (INIS)

    Hubert, P.

    1955-01-01

    When the radioactivity has been discovered, it was observed by researchers that different materials as mineral salts or solutions were emitting a weak light when submitted to radioactivity beams. At the beginning it has been thought that it was fluorescent light. In 1934, Cherenkov, a russian physicist, worked on the luminescence of uranyl salts solutions caused by gamma radiation and observed a very weak light was emitted by pure liquid. After further studies, he concluded that this phenomena was different from fluorescence. Since then, it has been called Cherenkov effect. This blue light emission is produced when charged particles are going through a transparent medium with an upper velocity than light velocity. This can happen only in medium with large refractive index as water or glass. It also presents its different properties discovered afterwards. The different applications of the Cherenkov radiation are discussed as counting techniques for radiation detectors or comic ray detectors. (M.P.)

  2. Radiation control

    International Nuclear Information System (INIS)

    Uchida, Akira

    1981-01-01

    This paper describes on how the condition of radiation level in the ring (storage ring) experimentation room changes corresponding to the operating stage of SOR-ring (synchrotron radiation storage ring), and does not describe on the present radiation control in the SOR facility. The operating stage of SOR is divided into the following five: (1) 307 MeV electron injection, (2) 307 MeV electron storage (used for SOR experiments), (3) energy increase from 307 to 380 MeV, (4) 380 MeV electron storage, (5) re-injection and completion of operation. Gamma and X ray levels are shown when electron beam is injected from the electron synchrotron to the SOR-ring. Two main causes of the high level are reported. Spatial dose rate in storing 307 MeV electrons in also illustrated. This is sufficiently lower than that at electron incidence. The measurement of radiation level at the time of energy increase from 307 to 380 MeV has just started. Since the radiation level in 380 MeV storage, measured at the points about 20 cm apart from the electron orbit, showed several mR/h, the level seems to be negligible at the points where experiments are carried out, 1 m away from the measurement points. The radiation level in electron reinjection and completion of operation may be large during a short period (a few Roentgen) like the time of energy increase. Therefore, the beam shall be re-injected or decreased after confirming that all experimenters have retreated into the predetermined place. (Wakatsuki, Y.)

  3. Radiation risks

    International Nuclear Information System (INIS)

    1991-01-01

    This report contains an evaluation of data available about the deleterious effects of exposure of people to ionising radiation, assuming that the total exposure is low (low dose) or that exposure to dose takes place gradually (low dose rate). It is a revision of the 1985 Health Council report on 'The scientific foundations for radiation protection policy based on the UNSCEAR-77, -82, and BEIR reports'. The report is also meant to be a reply to a request for advice made by the Minister of Welfare, Public Health and Culture in 1989. Scientific opinion on induction of cancer by radiation has clearly changed since 1988. This is a consequence of new publications of epidemiological studies among survivors of the atomic explosions of Hiroshima and Nagasaki. The Committee that has produced the present report has paid much attention to this development. Besides, in the request for advice just mentioned it is asked whether the margins of uncertainty which complicated the quantitative assessment of the radiation risk can be reduced. Consequently the Committee has dealt extensively with the potential errors and uncertainties in available data. Especially these 2 elements - a careful consideration of a recent shift in scientific opinion and a constant attention for the magnitude of potential uncertainties - have had a predominant influence on the content and design of this report. The Committee has tried to answer as fully as possible the complex question how to transform results of scientific research into a well-organised data set on which the government can base its radiation protection policy. The Committee had also compared its evaluation to the recent recommendations of the International Commission on Radiological Protection (ICRP) and the points of view of the Dutch policy directive 'Dealing with radiation risks'. (author). 111 refs.; 12 tabs

  4. Radiation dermatitis

    Energy Technology Data Exchange (ETDEWEB)

    Shack, R.B.; Lynch, J.B.

    1987-04-01

    Even in this era of modern radiotherapy, injuries associated with the medical and industrial use of radiation devices will continue to pose a difficult problem for the reconstructive surgeon. It must be borne in mind that the single most serious hazard to surgery in irradiated tissue is the lodgement of bacteria in tissue rendered avascular by the radiation and the secondary necrosis from the infection itself. The basic principles of wound management must be augmented by thorough knowledge of the use of well-vascularized muscle and musculocutaneous flap to provide adequate, blood-rich, soft-tissue coverage.

  5. Radiation physics

    International Nuclear Information System (INIS)

    Anon.

    1976-01-01

    The radiation physics program is directed toward understanding the basic mechanism by which charged particles lose energy in traversing matter, and presenting this information in a way meaningful to the study of radiation dosimetry and biological damage. Measurements of the absolute cross sections for the ejection of electrons from ionization by fast charged particles, measurements of optical fluorescence from liquid systems, preliminary analyses of electron emission cross sections for proton bombardment of carbon foils, and nonexponential decay of fluorescence in both polar and nonpolar solutions are covered

  6. Radiation toxicology

    International Nuclear Information System (INIS)

    Fry, R.J.M.; Storer, J.B.; Ullrich, R.L.

    1979-01-01

    Extensive studies on both human and experimental animal populations have provided information that allow radiation protection standards to be set with greater confidence than for most if not all other carcinogenic agents. Furthermore, both international and national advisory bodies are continually updating the risk estimates and the standards as new information is available. However, it is clear that models are needed that take into account the multistage nature of carcinogenesis. Studies in both ionizing and ultraviolet radiation carcinogenesis are more valuable to the general problem of elucidating the mechanisms involved in cancer than is indicated by the amount of work or support for this field of research

  7. Radiation toxicology

    International Nuclear Information System (INIS)

    Fry, R.J.M.; Storer, J.B.; Ullrich, R.L.

    1979-01-01

    The extensive studies on both human and experimental animal populations have provided information that allows radiation protection standards to be set with greater confidence than for most if not all other carcinogenic agents. Furthermore, both international and national advisory bodies are continually updating the risk estimates and the standards as new information is available. However, it is clear that we need models that take into account the multistage nature of carcinogenesis. Studies in both ionizing and ultraviolet radiation carcinogenesis are more valuable to the general problem of elucidating the mechanisms involved in cancer than is indicated by the amount of work or support for this field of research

  8. Protéger la biodiversité : Les lois nationales régissant l'accès aux ...

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

    Les directeurs. Susan Perkoff Bass est directrice du Programme interaméricain à l'Environmental Law Institute de Washington, D.C., aux États-Unis. Manuel Ruiz Muller est chercheur principal du Programme sur la biodiversité de la Sociedad Peruana de Derecho Ambiental ( SPDA ) à Lima, au Pérou.

  9. Localized Iron Supply Triggers Lateral Root Elongation in Arabidopsis by Altering the AUX1-Mediated Auxin Distribution[C][W][OA

    Science.gov (United States)

    Giehl, Ricardo F.H.; Lima, Joni E.; von Wirén, Nicolaus

    2012-01-01

    Root system architecture depends on nutrient availability, which shapes primary and lateral root development in a nutrient-specific manner. To better understand how nutrient signals are integrated into root developmental programs, we investigated the morphological response of Arabidopsis thaliana roots to iron (Fe). Relative to a homogeneous supply, localized Fe supply in horizontally separated agar plates doubled lateral root length without having a differential effect on lateral root number. In the Fe uptake-defective mutant iron-regulated transporter1 (irt1), lateral root development was severely repressed, but a requirement for IRT1 could be circumvented by Fe application to shoots, indicating that symplastic Fe triggered the local elongation of lateral roots. The Fe-stimulated emergence of lateral root primordia and root cell elongation depended on the rootward auxin stream and was accompanied by a higher activity of the auxin reporter DR5-β-glucuronidase in lateral root apices. A crucial role of the auxin transporter AUXIN RESISTANT1 (AUX1) in Fe-triggered lateral root elongation was indicated by Fe-responsive AUX1 promoter activities in lateral root apices and by the failure of the aux1-T mutant to elongate lateral roots into Fe-enriched agar patches. We conclude that a local symplastic Fe gradient in lateral roots upregulates AUX1 to accumulate auxin in lateral root apices as a prerequisite for lateral root elongation. PMID:22234997

  10. Pollution durable des sols par la chlordécone aux Antilles : comment la gérer ?

    OpenAIRE

    Cabidoche, Yves-Marie; Lesueur-Jannoyer, Magali

    2011-01-01

    La chlordécone, insecticide organochloré de synthèse, était utilisée dans les bananeraies antillaises avant 1993. Pourtant, elle contamine encore les ressources en eau, certaines denrées, et des organismes aquatiques. Très tôt, la recherche agronomique s’est mobilisée pour répondre aux questions posées pour la gestion de cette crise : Où sont les sols pollués? Est-ce une pollution durable ? La molécule est peu mobile. Des cartes de risques, fondées sur leur occupation rétrospective en bananer...

  11. Marketers as Innovators: how ethnic marketing revisits ethnicity Marketing ethnique et innovation aux États-Unis

    Directory of Open Access Journals (Sweden)

    Marie-Christine Pauwels

    2009-10-01

    Full Text Available L’innovation aux États-Unis est ici vue sous un angle social et culturel. Il ne s’agit plus d’étudier l’innovation technologique, mais l’innovation en matière de produit. L’article aborde la création de valeur à travers la variable ethnique dans le domaine de la vente, du marketing et de la publicité. Les nouvelles tendances en matière d’ethno-marketing sont analysées, en particulier la manière dont les professionnels utilisent la notion d’ethnicité pour vendre des produits de consommation courante à un marché de consommateurs de plus en plus exigeants, soit en ayant recours à une segmentation de ces consommateurs en micro-marchés toujours plus étroits, soit en privilégiant un marketing multi- ou trans-culturel.

  12. L'imaginaire du complot : discours d'extrême droite en France et aux Etats-Unis

    OpenAIRE

    Jamin, Jérôme

    2009-01-01

    Le nationalisme, la xénophobie, le racisme et l’antisémitisme, l’opposition aux élites, la stigmatisation des étrangers, les discours anti-immigrés, mais aussi l’autoritarisme, l’idéologie ‘loi et ordre’ (Law and order), l’antiparlementarisme et l’anticommunisme, entre autres traits caractéristiques, représentent quelques-uns des qualificatifs les plus souvent cités dans la littérature consacrée au populisme et à l’extrême droite. En fonction des partis politiques concernés, des contextes ins...

  13. The Politics of Religion in the United States Manifestations politiques de la religion aux États-Unis

    Directory of Open Access Journals (Sweden)

    Josef Braml

    2011-04-01

    Full Text Available Aux États-Unis, les attitudes religieuses ont plus d’influence sur les choix politiques que dans n’importe quelle autre démocratie occidentale. L’engagement religieux/moral de la droite chrétienne polarise les États-Unis, ce qui a des conséquences sur le plan électoral mais aussi sur les choix politiques réels. L’importance de la droite chrétienne dans la coalition électorale du Parti républicain oblige celui-ci à mettre l’accent sur les questions liées à la sécurité nationale, en particulier la lutte anti-terroriste, afin de mieux souder une coalition électorale hétérogène.

  14. Diversification and expression of the PIN, AUX/LAX and ABCB families of putative auxin transporters in Populus

    Directory of Open Access Journals (Sweden)

    Nicola eCarraro

    2012-02-01

    Full Text Available Intercellular transport of the plant hormone auxin is mediated by three families of membrane-bound protein carriers, with the PIN and ABCB families coding primarily for efflux proteins and the AUX/LAX family coding for influx proteins. In the last decade our understanding of gene and protein function for these transporters in Arabidopsis has expanded rapidly but very little is known about their role in woody plant development. Here we present a comprehensive account of all three families in the model woody species Populus, including chromosome distribution, protein structure, quantitative gene expression, and evolutionary relationships. The PIN and AUX/LAX gene families in Populus comprise 16 and 8 members respectively, and show evidence for the retention of paralogs following a relatively recent whole genome duplication. There is also evidence for differential expression across tissues within many gene pairs. The ABCB family is previously undescribed in Populus and includes 20 members, showing a much deeper evolutionary history including both tandem and whole genome duplication as well as probable loss. A striking number of these transporters are expressed in developing Populus stems and we suggest that evolutionary and structural relationships with known auxin transporters in Arabidopsis can point toward candidate genes for further study in Populus. This is especially important for the ABCBs, which is a large family and includes members in Arabidopsis that are able to transport other substrates in addition to auxin. Protein modeling, sequence alignment and expression data all point to ABCB1.1 as a likely auxin transport protein in Populus. Given that basipetal auxin flow through the cambial zone shapes the development of woody stems, it is important that we identify the full complement of proteins involved in this process. This work should lay the foundation for studies targeting specific proteins for functional characterization and in situ

  15. L’institutionnalisme de John Commons et les origines de l’État providence aux États-Unis

    Directory of Open Access Journals (Sweden)

    Isabel da Costa

    2010-12-01

    Full Text Available La politique officielle des États-Unis, soutenue par la pensée économique et juridique, était à l’origine le « laissez-faire » sur le marché et dans les relations de travail. Cet article analyse la construction d’un rôle légitime pour l’État dans la régulation sociale du marché du travail à travers l’ébauche de réglementations du travail et l’émergence de dispositifs de protection sociale aux États-Unis. Nous analyserons tout d’abord comment le mouvement progressiste a impulsé certaines réformes sociales établissant les prémisses d’une législation sociale ; nous nous attacherons ensuite à démontrer la contribution majeure de l’institutionnalisme de John Commons et de ses disciples de l’université du Wisconsin à la conception et au développement de l’État providence aux États-Unis.The official policy of the United States, backed by economic and legal thought, was originally “laissez-faire” on the market and in labor relations. This article analyzes the development of a legitimate role for the state in the social regulation of the labor market through the emergence of the early labor regulations and social protection schemes in the United States. We first analyze how the progressive movement brought about certain social reforms establishing the beginnings of social legislation; we will then focus on the major contribution of the institutionalism of John Commons and his followers from the University of Wisconsin to the design and the development of the welfare state in the United States.

  16. Neutron Radiation Affects the Expression of Genes Involved in the Response to Auxin, Senescence and Oxidative Stress in Arabidopsis

    Science.gov (United States)

    Fortunati, A.; Tassone, P.; Migliaccio, F.

    2008-06-01

    Researches were conducted on the effect of neutron radiation on the expression of genes auxin activated or connected with the process of senescence in Arabidopsis plants. The research was done by applying the real-time polymerase chain reaction (PCR) technique. The results indicated that the auxin response factors (ARFs) genes are clearly downregulated, whereas the indolacetic acid-induced (Aux/IAAs) genes in some cases were upregulated. By contrast in the mutants for auxin transport aux1 and eir1 the ARFs genes were upregulated. In addition, both in the wildtype and mutants, some already known genes activated by stress and senescence were significantly upregulated. On the basis of these researches we conclude that the process of senescence induced by irradiation is, at least in part, controlled by the physiology of the hormone auxin.

  17. Radiation enteropathy

    Energy Technology Data Exchange (ETDEWEB)

    Farthmann, E.H. (Chirurgische Universitaetsklinik, Freiburg im Breisgau (Germany)); Imdahl, A. (Chirurgische Universitaetsklinik, Freiburg im Breisgau (Germany)); Eggstein, S. (Chirurgische Universitaetsklinik, Freiburg im Breisgau (Germany))

    1994-08-01

    The pathogenesis, clinical picture, diagnosis and treatment of radiation damage to the gut are described. The progress of 90 patients operated on in the Chirurgische Universitaetsklinik Freiburg is retrospectively evaluated. Haemorrhage, vomiting, diarrhoea and, occasionally, perforation are the signs of acute radiation enteropathy, which appears weeks or months after radiotherapy. Expect for perforations, these can usually be treated conservatively. Chronic radiation enteropathy does not manifest itself until years after irradiation, with diarrhoea, obstruction and the development of fistulae. The acute ileus can often be relieved with decompression tubes. After localising the stenosis radiologically with a contrast medium, and improvement in the general condition, many cases require operative intervention. This usually consists of resection, the establishment of a bypass anastomosis or enterostomy. In 44% of the patients postoperative complications followed, with a mortality of 22%. The cause of the high complication rate is partly the poor general condition of the patient, and partly the radiation induced impairment in wound healing, which may lead to insufficiency of the anastomosis and the development of fistulae. (orig./MG)

  18. Radiation detectors

    International Nuclear Information System (INIS)

    2013-01-01

    This sixth chapter presents the operational principles of the radiation detectors; detection using photographic emulsions; thermoluminescent detectors; gas detectors; scintillation detectors; liquid scintillation detectors; detectors using semiconductor materials; calibration of detectors; Bragg-Gray theory; measurement chain and uncertainties associated to measurements

  19. Radiation processing

    International Nuclear Information System (INIS)

    Noriah Mod Ali

    2005-01-01

    This chapter covers the basic principle and application of radiation technology. The topic titled specific application discussed briefly the following subtopics: 1) Polymer modification - crosslinking, polymerisation, degradation, grafting; 2) Medical sterilisation; 3) Food irradiation; 4) Environmental protection - waste processing, pollutants treatment

  20. Radiation dosimetry

    International Nuclear Information System (INIS)

    Aymar A, J.; Medina G, H.

    1988-01-01

    Film is one of the most simple ways to detect radiation although for film as dosimeters a careful attention is required in many aspects, such as emulsion characteristics, film response capacity processing techniques and interpretation of the exposition. Surpassing these factors the film dosimeter is the most reliable

  1. Radiation enteropathy

    International Nuclear Information System (INIS)

    Farthmann, E.H.; Imdahl, A.; Eggstein, S.

    1994-01-01

    The pathogenesis, clinical picture, diagnosis and treatment of radiation damage to the gut are described. The progress of 90 patients operated on in the Chirurgische Universitaetsklinik Freiburg is retrospectively evaluated. Haemorrhage, vomiting, diarrhoea and, occasionally, perforation are the signs of acute radiation enteropathy, which appears weeks or months after radiotherapy. Expect for perforations, these can usually be treated conservatively. Chronic radiation enteropathy does not manifest itself until years after irradiation, with diarrhoea, obstruction and the development of fistulae. The acute ileus can often be relieved with decompression tubes. After localising the stenosis radiologically with a contrast medium, and improvement in the general condition, many cases require operative intervention. This usually consists of resection, the establishment of a bypass anastomosis or enterostomy. In 44% of the patients postoperative complications followed, with a mortality of 22%. The cause of the high complication rate is partly the poor general condition of the patient, and partly the radiation induced impairment in wound healing, which may lead to insufficiency of the anastomosis and the development of fistulae. (orig./MG) [de

  2. Radiation dosage

    International Nuclear Information System (INIS)

    Finston, Roland

    1986-01-01

    Radiation dosage at Bikini Atoll is the result of current soil contamination, a relic of the nuclear weapons testing program of some 30 years ago. The principal contaminants today and some of their physical properties are listed: cesium-137, strontium-90, plutonium -239, 240 and americium-241. Cobalt-60 contributes less than 1 to the dose and is not considered significant. A resident of the atoll would accumulate radiation dose (rem) in two ways -- by exposure to radiation emanating from the ground and vegetation, and by exposure to radiation released in the spontaneous decay of radionuclides that have entered his body during the ingestion of locally grown foods. The latter process would account for some 90% of the dose; cesium-137 would be responsible for 0 90% of it. Since BARC's method of estimating dosage differs in some respects from that employed by the Lawrence Livermore National Laboratory (LLNL), (Ref.1, LLNL 1982) we are presenting our method in detail. The differences have two sources. First, the numbers used by BARC for the daily ingestion of radionuclides via the diet are higher than LLNL's. Second, BARC's calculation of dose from radionuclide intake utilizes the ICRP system. The net result is that BARC doses are consistently higher than LLNL doses, and in this respect are more conservative

  3. Radiation accidents

    International Nuclear Information System (INIS)

    Saenger, E.L.

    1986-01-01

    It is essential that emergency physicians understand ways to manage patients contaminated by radioactive materials and/or exposed to external radiation sources. Contamination accidents require careful surveys to identify the metabolic pathway of the radionuclides to guide prognosis and treatment. The level of treatment required will depend on careful surveys and meticulous decontamination. There is no specific therapy for the acute radiation syndrome. Prophylactic antibodies are desirable. For severely exposed patients treatment is similar to the supportive care given to patients undergoing organ transplantation. For high-dose extremity injury, no methods have been developed to reverse the fibrosing endarteritis that eventually leads to tissue death so frequently found with this type of injury. Although the Three Mile Island episode of March 1979 created tremendous public concern, there were no radiation injuries. The contamination outside the reactor building and the release of radioiodine were negligible. The accidental fuel element meltdown at Chernobyl, USSR, resulted in many cases of acute radiation syndrome. More than 100,000 people were exposed to high levels of radioactive fallout. The general principles outlined here are applicable to accidents of that degree of severity

  4. Genome-wide analysis and characterization of Aux/IAA family genes related to fruit ripening in papaya (Carica papaya L.).

    Science.gov (United States)

    Liu, Kaidong; Yuan, Changchun; Feng, Shaoxian; Zhong, Shuting; Li, Haili; Zhong, Jundi; Shen, Chenjia; Liu, Jinxiang

    2017-05-05

    Auxin/indole-3-acetic acid (Aux/IAA) family genes encode short-lived nuclear proteins that mediate the responses of auxin-related genes and are involved in several plant developmental and growth processes. However, how Aux/IAA genes function in the fruit development and ripening of papaya (Carica papaya L.) is largely unknown. In this study, a comprehensive identification and a distinctive expression analysis of 18 C. papaya Aux/IAA (CpIAA) genes were performed using newly updated papaya reference genome data. The Aux/IAA gene family in papaya is slightly smaller than that in Arabidopsis, but all of the phylogenetic subfamilies are represented. Most of the CpIAA genes are responsive to various phytohormones and expressed in a tissues-specific manner. To understand the putative biological functions of the CpIAA genes involved in fruit development and ripening, quantitative real-time PCR was used to test the expression profiling of CpIAA genes at different stages. Furthermore, an IAA treatment significantly delayed the ripening process in papaya fruit at the early stages. The expression changes of CpIAA genes in ACC and 1-MCP treatments suggested a crosstalk between auxin and ethylene during the fruit ripening process of papaya. Our study provided comprehensive information on the Aux/IAA family in papaya, including gene structures, phylogenetic relationships and expression profiles. The involvement of CpIAA gene expression changes in fruit development and ripening gives us an opportunity to understand the roles of auxin signaling in the maturation of papaya reproductive organs.

  5. Introduction to radiation biology

    International Nuclear Information System (INIS)

    Gensicke, F.

    1977-01-01

    The textbook is written with special regard to radiation protection of man. It shall enable the reader to assess the potential radiation risks to living organisms and lead him to an insight into radiation protection measures. The following topics are covered: physical fundamentals of ionizing radiations; physical and chemical fundamentals of biological radiation effects; radiation effects on cells, organs, organ systems, and whole animal organisms focussing on mammals and man; modification of radiation effects; chemical radiation protection; therapy of radiation injuries; radionuclide kinetics; biological radiation effects in connection with radiation hazards and with the limitation of radiation exposure. It is intended for vocational education of medical personnel

  6. Recours aux médicaments et aux consultations psychologiques chez les Canadiens atteints d'un trouble de l'humeur et/ou d'anxiété

    Directory of Open Access Journals (Sweden)

    Siobhan O'Donnell

    2017-01-01

    Full Text Available Introduction : L'étude décrit le recours aux médicaments sur ordonnance et aux consultations psychologiques au cours des 12 derniers mois chez les Canadiens adultes ayant déclaré avoir reçu un diagnostic de trouble de l'humeur et/ou d'anxiété, les caractéristiques sociodémographiques et cliniques associées à ce recours et les raisons invoquées pour ne pas y recourir. Méthodologie : L'Enquête sur les personnes ayant une maladie chronique au Canada - Composante sur les troubles de l'humeur et d'anxiété de 2014 a été utilisée. L'échantillon de l'étude (n = 2 916 a été divisé en quatre sous-groupes de traitement : (1 prend des médicaments seulement; (2 a reçu des consultations psychologiques seulement; (3 prend des médicaments et a reçu des consultations psychologiques; ou (4 n'a eu recours à aucun de ces deux traitements. Nous avons combiné les trois premiers sous-groupes et effectué des analyses descriptives et de régression logistique multivariée pour comparer ceux qui prenaient des médicaments et/ou avaient reçu des consultations psychologiques par rapport à ceux n'ayant pas eu recours à ces deux traitements. Nous avons pondéré toutes les estimations afin que les données soient représentatives de la population canadienne adulte vivant en logement privé dans l'une des 10 provinces et ayant déclaré avoir reçu un diagnostic de troubles de l'humeur et/ou d'anxiété. Résultats : La majorité (81,8 % des Canadiens adultes ayant déclaré avoir reçu un diagnostic de trouble de l'humeur et/ou d'anxiété ont indiqué prendre des médicaments et/ou avoir reçu des consultations psychologiques (47,6 % prenaient des médicaments seulement, 6,9 % avaient reçu des consultations psychologiques seulement et 27,3 % avaient eu recours aux deux modalités de traitement. Après ajustement des caractéristiques individuelles, le recours aux médicaments et/ou aux consultations psychologiques était significativement

  7. Risk Factors: Radiation

    Science.gov (United States)

    Radiation of certain wavelengths, called ionizing radiation, has enough energy to damage DNA and cause cancer. Ionizing radiation includes radon, x-rays, gamma rays, and other forms of high-energy radiation.

  8. Radiation Therapy for Cancer

    Science.gov (United States)

    ... material placed in the body near cancer cells ( internal radiation therapy , also called brachytherapy ). Systemic radiation therapy uses radioactive ... material placed in the body near cancer cells (internal radiation therapy, more commonly called brachytherapy). Systemic radiation therapy uses ...

  9. Chest radiation - discharge

    Science.gov (United States)

    Radiation - chest - discharge; Cancer - chest radiation; Lymphoma - chest radiation ... When you have radiation treatment for cancer, your body goes through changes. About 2 weeks after your first treatment: It may be hard ...

  10. Radiation effects

    International Nuclear Information System (INIS)

    Collings, E.W.

    1986-01-01

    An important cause of deterioration in superconducting magnets intended for high-energy physics and fusion-reactor applications is radiation damage. The present chapter deals chiefly with the effects of electron, proton, gamma and neutron irradiation on the properties of stabilized Ti-Nb-base composite superconductors. The authors examine the particle-accelerator environment, electron irradiation of Ti-Nb superconductor, proton irradiation of Ti-Nb superconductor and its stabilizer, and deuteron irradiation of Ti-Nb superconductor. A section discussing the fusion reactor environment in general is presented, and the two principal classes of fusion reactor based on the magnetic-confinement concept, namely the tokamak and the mirrormachine are examined. Also discussed is neutron irradiation of Cu/TiNb composite superconductors and critical current density of neutronirradiated Ti-Nb. Finally, radiation damage to stabilizer and insulating materials is described

  11. Radiation detector

    International Nuclear Information System (INIS)

    Gillies, W.

    1980-01-01

    The radiation detector for measuring e.g. a neutron flux consists of a central emitter, an insulating shell arranged around it, and a tube-shaped collector enclosing both. The emitter itself is composed of a great number of stranded, spiral wires of small diameter giving a defined flexibility to the detector. For emitter material Pt, Rh, V, Co, Ce, Os or Ta may be used. (DG) [de

  12. Radiation accidents

    International Nuclear Information System (INIS)

    Poplavskij, K.K.; Smorodintseva, G.I.

    1978-01-01

    On the basis of a critical analysis of the available data on causes and consequences of radiation accidents (RA), a classification of RA by severity (five groups of accidents) according to biomedical consequences and categories of exposed personnel is proposed. A RA is defined and its main characteristics are described. Methods of RA prevention are proposed, as is a plan of specific measures to deal with RA in accordance with the proposed classification

  13. Radiation retinopathy

    International Nuclear Information System (INIS)

    Wara, W.M.; Irvine, A.R.; Neger, R.E.; Howes, E.L. Jr.; Phillips, T.L.

    1979-01-01

    The records were reviewed of all patients treated with irradiation to the eye at the University of California, San Francisco, between 1960 and 1975. Eight patients were identified who had developed radiation retinopathy 1 to 3 years postrirradiation. Lesions included retinal vascular occlusions, hemorrhages, microaneurysms, exudates, neovascularization, vitreous hemorrhage, retinal detachments, and optic atrophy with blindness. Four patients had received less than 5000 rad in 6 weeks to the retina, a dose usually considered within normal tissue tolerance

  14. Radiation shelter

    International Nuclear Information System (INIS)

    Crookes, T.A.

    1982-01-01

    This patent application describes a shelter comprising a cavity for receiving life to be sheltered; a roof for covering at least a portion of said cavity, and at least one aqueous, protective barrier layer adapted to prevent transmission through said roof and into said cavity of at least a portion of radiation in a predetermined spectrum. The cavity walls may be impregnated with an oil suitable for dressing burns. (author)

  15. Space Radiation

    Energy Technology Data Exchange (ETDEWEB)

    Corliss, William R.

    1968-01-01

    This booklet discusses three kinds of space radiation, cosmic rays, Van Allen Belts, and solar plasma. Cosmic rays are penetrating particles that we cannot see, hear or feel, which come from distant stars. Van Allen Belts, named after their discoverer are great belts of protons and electrons that the earth has captured in its magnetic trap. Solar plasma is a gaseous, electrically neutral mixture of positive and negative ions that the sun spews out from convulsed regions on its surface.

  16. Radiation smog

    International Nuclear Information System (INIS)

    Spurny, Z.

    1988-01-01

    The principle is described of the production of radiation smog resulting from radioactive emisions. The differences are discussed in the contamination over the territory of Czechoslovakia following the Chernobyl accident. The higher surface contamination of industrial areas recorded after the accident can be explained by electroprecipitation of industrial impurities with the radicals and ions of the radioactive cloud. (E.S.). 3 figs., 16 refs

  17. Radiation pager

    International Nuclear Information System (INIS)

    Warren, J.L.; Vadnais, K.G.

    1998-01-01

    Methods of interdicting nuclear materials to date have favored the use of large portal detectors at choke points, or hand carried instruments used by trained personnel for conducting spot searches. Although these methods are effective in some instances, it is often impractical to insert choke points at busy traffic areas, and it is not cost effective to maintain a force of skilled operators whose focus is nuclear interdiction. Recent technology developments are causing profound changes in the philosophy and methods employed for interdicting nuclear materials. Breakthrough advances in the miniaturization of detectors and low power electronics have made possible a new class of small gamma-ray radiation detectors, roughly the size of a message pager, with unprecedented sensitivity for their size. These instruments, named Radiation Pagers TM , are ideally suited for use by untrained individual law enforcement personnel and emergency responders in the course of their regular duties. New tactics that utilize a radiation detector worn by every officer are creating a moving curtain of detection with a significantly higher likelihood of locating illicit nuclear contraband. These individual detectors also provide each officer with a high level of confidence that they are not being unknowingly irradiated in the course of their work. (author)

  18. Applications of nuclear radiations

    International Nuclear Information System (INIS)

    Hanagodimath, S.M.

    2012-01-01

    Nuclear radiations are powerful and non destructive tools in industry, medicine, defence, agriculture and research. In the present lecture, the types of nuclear radiations, radiation sources, detection of radiation, uses of radiation, dangers of nuclear radiation and nuclear energy will be discussed. (author)

  19. Perspective of radiation processing

    International Nuclear Information System (INIS)

    Zhang Manwei

    1987-01-01

    The area of the applications of radiation techniques is very wide. This paper only relates to the applications of radiation techniques in industries including radiation chemical industry, radiation processing of foods and environmental protection by radiation, but the nuclear instruments and the instrumentations of radiation are out-side of our study. (author)

  20. Du sport aux activités physiques de loisir : des formes culturelles et sociales bigarrées

    Directory of Open Access Journals (Sweden)

    Éric Dugas

    2007-07-01

    Full Text Available L'espace ludique des formes sociales des pratiques physiques accepte maintes variations. Du jeu informel et libre aux activités physiques institutionnelles (les sports, plusieurs catégories de situations motrices, distinctes des unes des autres, jalonnent l'espace des jeux sportifs. Après avoir défini et délimité, dans un premier temps, les contours et la richesse de l'univers des pratiques physiques ludiques, nous essayons, dans un second temps de mettre au jour le type de pratiques qui coïncident le mieux aux aspirations des pratiquants du xxie siècle. On s'aperçoit actuellement que malgré l'hégémonie du sport au sein de l'espace médiatique et économique, il se dessine néanmoins une tendance forte : la prédominance d’activités physiques ludiques de plus en plus autocontrôlées qui laissent l'initiative aux pratiquants et dans lesquelles les institutions sportives ne sont plus totalement ou pas du tout maître du jeu.From sport to leisure physical activities: mixed cultural and social formsThe game space of physical activities' social forms accepts many variations. From informal and free games to institutional physical activities (sports, several motor situation categories, distinct from each other, punctuate the space of physical games. After having specified and delimited the contours and richness of the world of playful physical activities, we will try to bring to light the kind of practices which coincide best with the 21st century's players or sports (women. Currently, we can see that in spite of sport's hegemony within the media and the economic spheres, a strong tendency is becoming apparent: the predominance of more and more self-controlled playful physical activities, which leave the initiative to players and in which governing bodies are not totally or not at all in command any more.Del deporte a las actividades de ocio: una mezcolanza en las formas culturales y socialesEl espacio lúdico de las formas sociales de

  1. Le rôle politique des revues conservatrices aux Etats-Unis depuis les années 1980

    Directory of Open Access Journals (Sweden)

    Marie-Cécile Naves

    2004-09-01

    Full Text Available L’article vise à étudier, à travers l’exemple de la théorie de la « Fin de l’Histoire » de Fukuyama, en quoi la revue américaine The National Interest est, à l’instar d’autres revues conservatrices, un instrument médiatique crucial pour la diffusion de certains idéaux du Parti Républicain aux Etats-Unis depuis le milieu des années 1980. Il s’agit par là même de réfléchir aux conditions de production et de diffusion de cette théorie, dans un contexte géopolitique et intellectuel exceptionnel, celui de la fin de la guerre froide. L’évolution des liens entre intellectuels et pouvoir politique américains, avec pour enjeu, depuis le début des années 1980, la politique étrangère, sont au cœur de cette réflexion.El artículo intenta estudiar a través del ejemplo de la teoría del « Fin de la Historia » de Fukuyama, hasta que punto la revista americana The National Interest es, a semejanza de otras revistas conservadoras, un instrumento crucial para la difusión de algunos ideales del partido republicano en los estados Unidos desde mediados de los años ochenta. Se trata de reflexionar sobre las condiciones de producción y de difusión de esta teoría, en un contexto geopolítico e intelectual excepcional, el del final de la guerra fría. El centro de esta reflexión es la evolución de las relaciones entre los intelectuales y el poder político americano, teniendo como telón de fondo, la política exterior.The article aims at studying, through the example of Fukuyama’s theory of the « End of History », how the American journal The National Interest, as other conservative journals, has, since the mid 1980s, been a crucial media instrument for the dissemination of some ideals of the Republican Party. We have thus to think about the conditions of production and dissemination of this theory in an exceptional geopolitical and intellectual context – the end of the cold war. The changing links between

  2. Radiation danger

    International Nuclear Information System (INIS)

    Gergely, S.M.

    1986-01-01

    The author is a journalist and has written the book 4 weeks after the Chernobyl accident because 'the experts have failed in informing on the consequences of Chernobyl in a way to keep the insecurity in the population within tolerable limits'. It is aimed at the interested layman. First the events as seen through the Austria media and the measures taken by the authorities during the 4 weeks are reviewed. In the rest of the books there is elementary information on some aspects of radioactivity, reactors and radiation limits although 'the connection between radioactivity and health is very complex'. (G.Q.)

  3. Radiation risks and radiation protection at CRNL

    International Nuclear Information System (INIS)

    Myers, D.K.

    1986-01-01

    Radiation exposure is an occupational hazard at CRNL. The predicted health effects of low levels of radiation are described and compared with other hazards of living. Data related to the health of radiation workers are also considered. Special attention is given to the expected effects of radiation on the unborn child. Measures taken to protect CRNL employees against undue occupational exposure to radiation are noted

  4. Desenvolvimento e aplicação de metodologia para auxílio da engenharia em automação residencial - MAER.

    OpenAIRE

    Robmilson Simões Gundim

    2007-01-01

    Este trabalho apresenta uma revisão bibliográfica sobre a teoria e a prática da Automação Residencial (AR) e também apresenta uma proposta de uma metodologia para auxílio da engenharia em AR intitulada MAEAR - Metodologia para Auxílio da Engenharia em Automação Residencial. Este trabalho apresenta também uma análise entre as principais teorias de controle desenvolvidas para a automação industrial, e a correlação das mesmas sobre sistemas de automação predial e residencial, assim como uma comp...

  5. Cinétique de photodéposition aux temps longs et réalisation de réseaux permanents modulables

    Science.gov (United States)

    Hugonnot, E.; Delville, J. P.

    2002-06-01

    La cinétique de photodéposition aux temps longs est étudiée expérimentalement dans une solution à base de chromate et théoriquement en utilisant un modèle thermodynamique de croissance de goutte. Un comportement universel de la croissance aux temps longs est alors trouvé. L'application de la photodéposition à la réalisation de réseaux holographiques est montrée et l'ajustement du modèle à partir de la figure de diffraction expérimentale permet de remonter à l'évolution temporelle de la morphologie induite par le champ laser.

  6. Synchrotron radiation

    International Nuclear Information System (INIS)

    Pattison, P.; Quinn, P.

    1990-01-01

    This report details the activities in synchrotron radiation and related areas at Daresbury Laboratory during 1989/90. The number and scope of the scientific reports submitted by external users and in-house staff is a reflection of the large amount of scheduled beamtime and high operating efficiency achieved at the Synchrotron Radiation Source (SRS) during the past year. Over 4000 hours of user beam were available, equivalent to about 80% of the total scheduled time. Many of the reports collected here illustrate the increasing technical complexity of the experiments now being carried out at Daresbury. Provision of the appropriate technical and scientific infrastructure and support is a continuing challenge. The development of the Materials Science Laboratory together with the existing Biological Support Laboratory will extend the range of experiments which can be carried out on the SRS. This will particularly facilitate work in which the sample must be prepared or characterised immediately before or during an experiment. The year 1989/90 has also seen a substantial upgrade of several stations, especially in the area of x-ray optics. Many of the advantages of the High Brightness Lattice can only be exploited effectively with the use of focusing optics. As the performance of these stations improves, the range of experiments which are feasible on the SRS will be extended significantly. (author)

  7. Radiation technology science

    International Nuclear Information System (INIS)

    Song, Jae Gwan

    1988-02-01

    This book deals with radiation technology and introduces various contents. It includes concept of radiation, fundamental physics, atom, electromagnetic radiation, electricity and magnetism, electromagnetism, interaction between X-rays and matter, process of latent image, intensifying screen, quality of radiography, special X-ray equipment, mammography, summary of computer, X-ray emission, nuclear magnetic resonance, grounded theory of radiation biology, initial effect of radiation, late effect of radiation, health physics, radiation protection, ultrasonic diagnosis.

  8. Modernité, corps et transformation de soi: Les salons de coiffure aux îles Tonga (Polynésie occidentale)

    NARCIS (Netherlands)

    Besnier, N.

    2013-01-01

    Aux îles Tonga, la fin des années 2000 fut marquée par une véritable explosion des salons de coiffure dans la petite capitale, Nuku’alofa. Ce phénomène reflète de nouvelles manières de concevoir le corps, par lesquelles les Tongiennes cherchent à se distancier de la vie traditionnelle sans néanmoins

  9. Étude de délimitation aux fins de l'Initiative régionale pour la lutte ...

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

    Étude de délimitation aux fins de l'Initiative régionale pour la lutte contre le tabac en Afrique. Financée par le CRDI et la Fondation Bill et Melinda Gates, l'initiative Analyses situationnelles de la lutte antitabac en Afrique (ASTA) a pour objectif de permettre de comprendre les facteurs déterminants du succès de la lutte ...

  10. Droit et accès des femmes à l'eau et aux systèmes d'assainissement ...

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

    2 mai 2012 ... Axe de rechercheLe projet vise à améliorer les services d'approvisionnement en eau et d'assainissement fournis aux femmes vivant dans les collectivités à faible revenu de New Delhi, de même qu'à favoriser de meilleurs rapports entre les habitants et les administrations locales.Le défi.

  11. ÉTUDE DE CAS – Côte d'Ivoire : De la forêt aux champs en Côte d ...

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

    11 janv. 2011 ... Aujourd'hui, Buyo fait partie de la « nouvelle ceinture du café et du cacao » de la Côte d'Ivoire et est devenu un pôle d'attraction pour les immigrants. La plupart y viennent en quête de terres où s'adonner aux cultures marchandes. Certains trouvent du travail dans lesexploitations forestières ou dans les ...

  12. Aux origines de la masse particules élémentaires et symétries fondamentales

    CERN Document Server

    Iliopoulos, Jean

    2014-01-01

    Pourquoi les « particules élémentaires » qui forment toute la matière ont-elles une masse ? Étrange question qui semble être en contradiction avec toute notre intuition physique. Dans ce livre, nous montrons d'abord que la réponse à cette question est tout sauf évidente et ensuite que la clé peut se trouver dans la découverte récente d'une nouvelle particule à l'accélérateur géant LHC (Large Hadron Collider) situé au CERN, près de Genève. Nous proposons au lecteur une promenade guidée qui l'emmènera des confins de l'Univers pendant les premières fractions de seconde après le Big Bang, aux plus petits constituants de la matière tels que nous les apercevons dans nos laboratoires. Notre guide sera un principe profond de symétrie qui, de façon surprenante, semble déterminer la structure du monde.

  13. Flora Tristan: De la nécessité de faire bon accueil aux femmes étrangères

    Directory of Open Access Journals (Sweden)

    Martine Reid

    2014-10-01

    Full Text Available Dans son traité De la nécessité de faire bon accueil aux femmes étrangères (1835, Flora Tristan (1803-1844, l’écrivaine française qui adopte l’état psychologique d’une étrangère dans son propre pays, traite de la situation des femmes “étrangères” qui voyagent seules en France et/ou commencent une nouvelle vie dans le pays, en particulier à Paris. Politiquement engagée auprès des plus défavorisés à partir du socialisme, Tristan propose la création d’une association pour ces femmes. En assimilant les deux groupes d'"étrangères” (nationales et non nationales, car elle pense que le même type d’accueil doit être fourni à toutes, Tristan préconise l’aide à la voisine nécessiteuse, voisine qui est à la fois un sujet national ou un sujet en transit, une femme sans-papiers ou une réfugiée.

  14. De la théorie des opérateurs aux fondements de la mécanique quantique

    CERN Document Server

    Rinkel, Jean-Marc

    2016-01-01

    Ce livre est destiné aux étudiants en sciences, mathématiques ou physiques, au niveau master. La formalisation de l’infiniment petit de la mécanique quantique est un miracle d’abstraction, d’étonnement et d’émerveillement. Autant le développement de la physique classique (mécaniques newtonienne, lagrangienne, hamiltonienne et relativités) est lié à celui de la géométrie et du calcul tensoriel, autant l’émergence et le développement de la mécanique quantique sont liés à la théorie des espaces de Hilbert et à la théorie de la mesure. Dès lors qu’une observable (ce qui est accessible à une mesure expérimentale) est représentée par un opérateur sur un espace de Hilbert, les mathématiques se chargent de construire des mesures de probabilité sur le spectre de cet opérateur et ces mesures de probabilités deviennent une réalité physique dans les lois de transition de Born. Cet ouvrage décrit de façon précise le passage des mathématiques que l’on vient d’évoquer, �...

  15. Les ecarts de financement en matiere d'adaptation aux changements climatiques - avec la perspective des CPDN

    DEFF Research Database (Denmark)

    Olhoff, Anne; Bee, Skylar; Puig, Daniel

    En 2014, le Programme des Nations Unies pour l’Environnement (PNUE) a publié son premier rapport sur les écarts entre besoins et perspectives en matière d’adaptation (AGR 2014) (PNUE, 2014), lequel a permis de poser un cadre préliminaire pour évaluer ces écarts et d’établir une évaluation...... rapport sur les écarts financiers et les options permettant de les combler. Le rapport sera publié au printemps 2016. Cette mise à jour doit contribuer aux débats lors de la 21ème session de la Conférence des Parties (COP 21) à la Convention-Cadre des Nations Unies sur les Changements Climatiques (CCNUCC...... les besoins de financement présentes dans les composantes adaptation des Contributions Prévues Déterminées au niveau National (CPDN) (INDC) – soit les engagements post 2020 que les pays se proposent mettre en oeuvre dans le cadre d’un nouvel accord mondial sur les changements climatiques....

  16. Dépendance économique aux produits forestiers non ligneux : cas des ménages riverains des forêts de Boulon et de Koflandé, au Sud-Ouest du Burkina Faso

    DEFF Research Database (Denmark)

    Ouédraogo, M; Ouédraogo, D; Thiombiano, T

    2013-01-01

    taille du ménage, la superficie forestière et la densité de population du département qui affectent positivement la dépendance aux PFNL. Dans le cadre d’une politique de réduction de la pauvreté en milieu rural, il faut prendre des mesures qui favorisent l’accès durable des ménages les plus pauvres aux...

  17. Radiation biophysics

    International Nuclear Information System (INIS)

    Anon.

    1979-01-01

    Summaries of research projects conducted during 1978 and 1979 are presented. The overall thrust of the research is aimed at understanding the effects of radiation on organisms. Specific subject areas include: the effects of heavy-particle beam nuclear interactions in tissue on dosimetry; tracer studies with radioactive fragments of heavy-ion beams; the effects of heavy/ions on human kidney cells and Chinese hamster cells; the response of a rhabdomyosarcoma tumor system in rats to heavy-ion beams; the use of heavy charged particles in radiotherapy of human cancer; heavy-ion radiography; the biological effects of high magnetic fields; central nervous system neurotoxicity; and biophysical studies on cell membranes

  18. RADIATION DOSIMETER

    Science.gov (United States)

    Balkwell, W.R. Jr.; Adams, G.D. Jr.

    1960-05-10

    An improvement was made in the determination of amounts of ionizing radiation, particularly low-energy beta particles of less than 1000 rad total dose by means of fluid-phase dosimeter employing a stabilized-- sensitized ferrous-ferric colorimetric system in a sulphuric acid medium. The improvement in the dosimeter consists of adding to the ferrous-ferric system in concentrations of 10/sub -2/ to 10/sup -4/M an organic compound having one or more carboxylic or equivalent groups, such compounds being capable of chelating or complexing the iron ions in the solution. Suitable sensitizing and stabilizing agents are benzoic, phthalic, salicylic, malonic, lactic, maleic, oxalic, citric, succinic, phenolic tartaric, acetic, and adipic acid, as well as other compounds which are added to the solution alone or in certain combinations. As in conventional fluid-phase dosimeters, the absorbed dosage is correlated with a corresponding change in optical density at particular wavelengths of the solution.

  19. Radiation accidents

    International Nuclear Information System (INIS)

    Nenot, J.C.

    1996-01-01

    Analysis of radiation accidents over a 50 year period shows that simple cases, where the initiating events were immediately recognised, the source identified and under control, the medical input confined to current handling, were exceptional. In many cases, the accidents were only diagnosed when some injuries presented by the victims suggested the radiological nature of the cause. After large-scale accidents, the situation becomes more complicated, either because of management or medical problems, or both. The review of selected accidents which resulted in severe consequences shows that most of them could have been avoided; lack of regulations, contempt for rules, human failure and insufficient training have been identified as frequent initiating parameters. In addition, the situation was worsened because of unpreparedness, insufficient planning, unadapted resources, and underestimation of psychosociological aspects. (author)

  20. Environmental radiation

    International Nuclear Information System (INIS)

    2008-01-01

    The types of ionizing radiations from the atomic nucleus are explained, such as the beams alpha, beta and gamma. The definitions of spectrometry and nuclear traces have been included.The study presents two researches realized in Costa Rica on the radioactive nuclear and artificial elements in the environment. The first shown is the analysis of coastal sediments where explains which are radioactive artificial isotopes and the pollution that occurs in food, coastal sediments, fertilizers, the soil, the water and the air. Within the analysis techniques are the gamma spectrometry, alpha spectrometry and nuclear strokes. Among the conclusions of this initial investigation is shown that at Punta Leona descendants of Uranium and Thorium present lower concentrations in relation to the gulf and its variations are not important. In the following study the radon gas is analyzed in the human environment where is determined that it is the second generator that causes cancer in lungs after the tobacco. This work indicates that the doses come from natural and artificial sources of radiation for the public are a whole of 2.7 mSv/year, information provided by the UNSCEAR, 2000. The radon gas is inert and radioactive of atomic number 86, includes 23 isotopes and 3 natural isotopes. The radon is everywhere, as are houses and buildings, in Costa Rica it is located in old homes with little ventilation. It describes the equipment used for the detection of radon gas in the environment. Within the conclusions radon gas is concentrated in confined spaces which can be harmful to health. It is determined that enough ventilation in places of high concentrations of radon is important. Finally it is recommended to monitor the sites where can be detected high concentrations of radon and that they have important influx of people [es

  1. Radiation chemistry comes before radiation biology.

    Science.gov (United States)

    O'Neill, Peter; Wardman, Peter

    2009-01-01

    This article seeks to illustrate some contributions of radiation chemistry to radiobiology and related science, and to draw attention to examples where radiation chemistry is central to our knowledge of specific aspects. Radiation chemistry is a mature branch of radiation science which is continually evolving and finding wider applications. This is particularly apparent in the study of the roles of free radicals in biology generally, and radiation biology specifically. The chemical viewpoint helps unite the spatial and temporal insight coming from radiation physics with the diversity of biological responses. While historically, the main application of radiation chemistry of relevance to radiation biology has been investigations of the free-radical processes leading to radiation-induced DNA damage and its chemical characterization, two features of radiation chemistry point to its wider importance. First, its emphasis on quantification and characterization at the molecular level helps provide links between DNA damage, biochemical repair processes, and mutagenicity and radiosensitivity. Second, its central pillar of chemical kinetics aids understanding of the roles of 'reactive oxygen species' in cell signalling and diverse biological effects more generally, and application of radiation chemistry in the development of drugs to enhance radiotherapy and as hypoxia-specific cytotoxins or diagnostic agents. The illustrations of the broader applications of radiation chemistry in this article focus on their relevance to radiation biology and demonstrate the importance of synergy in the radiation sciences. The past contributions of radiation chemistry to radiation biology are evident, but there remains considerable potential to help advance future biological understanding using the knowledge and techniques of radiation chemistry.

  2. Nuclear radiation in warfare

    International Nuclear Information System (INIS)

    Rotblat, J.

    1986-01-01

    The subject is covered in chapters, entitled: introduction; digest of nuclear weaponry (characteristics of nuclear weapons; effects of nuclear weapons other than ionizing radiation (fire-ball, fall-out, thermal radiation, blast wave, electromagnetic pulse); the nuclear arms race; war scenarios; biological effects of radiations on man (radiation doses; natural sources of radiation; acute effects of radiation; long-term somatic effects; genetic effects; factors affecting the biological response to radiation; internal exposure; synergistic effects; protection against radiation effects); radiations from nuclear explosions (initial radiation; fall-out; effects of fall-out on animal and plant life; contamination of water and food supplies by fall-out); radiation casualties in a nuclear war; effectiveness of civil defence; other warlike uses of radiation (attacks on civilian nuclear power installations; radiological warfare; terrorist activities); conclusion. (orig./HP) [de

  3. Nuclear radiation in warfare

    International Nuclear Information System (INIS)

    Rotblat, J.

    1981-01-01

    The subject is covered in chapters, entitled: introduction; digest of nuclear weaponry (characteristics of nuclear weapons; effects of nuclear weapons other than ionizing radiation (fire-ball, fall-out, thermal radiation, blast wave, electromagnetic pulse); the nuclear arms race; war scenarios); biological effects of radiations on man (radiation doses; natural sources of radiation; acute effects of radiation; long-term somatic effects; genetic effects; factors affecting the biological response to radiation; internal exposure; synergistic effects; protection against radiation effects); radiations from nuclear explosions (initial radiation; fall-out; effects of fall-out on animal and plant life; contamination of water and food supplies by fall-out); radiation casualties in a nuclear war; effectiveness of civil defence; other warlike uses of radiation (attacks on civilian nuclear power installations; radiological warfare; terrorist activities); conclusion. (U.K.)

  4. Radiation therapy -- skin care

    Science.gov (United States)

    ... this page: //medlineplus.gov/ency/patientinstructions/000735.htm Radiation therapy - skin care To use the sharing features on ... should treat your skin with care while receiving radiation therapy. Causes External radiation therapy uses high-powered x- ...

  5. Breast radiation - discharge

    Science.gov (United States)

    Radiation - breast - discharge ... away around 4 to 6 weeks after the radiation treatment is over. You may notice changes in ... breast looks or feels (if you are getting radiation after a lumpectomy). These changes include: Soreness or ...

  6. Black-Body Radiation

    Indian Academy of Sciences (India)

    Keywords. Black-body radiation; thermal radiation; heat; electromagnetic radiation; Stefan's Law; Stefan–Boltzmann Law; Wien's Law; Rayleigh–Jeans Law; black-body spectrum; ultraviolet catastrophe; zero point energy; photon.

  7. Summary of regulation applicable to the gamma-graphy activities; Rappel de la reglementation applicable aux activites de gammagraphie

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-04-15

    The regulations relative to the gamma radiography activities concerns in one hand the radioactive sources, and on the other hand the radiation protection of the workers. The necessity of having a person competent in radiation protection and the tasks he or she has to do are described. The training of operators, the medical surveillance, the dosimetry are such obligations. The maintenance of equipment is an other obligation. The last point concerns the transport of radioactive materials. (N.C.)

  8. Le projet Petits Films : du retour aux participants à la valorisation des données

    Directory of Open Access Journals (Sweden)

    Piccoli Vanessa

    2015-01-01

    Full Text Available En 2014, au sein du laboratoire ICAR (équipe InSitu / Cellule Corpus Complexe un projet appelé “Petits Films” a été conduit avec une double finalité : confectionner des petits films à partir de trois différents corpus et parallèlement mener une réflexion sur les modalités de réalisation, les finalités et les contraintes de ce type de réalisation. On considère que dans le domaine de l’analyse conversationnelle, dans lequel les chercheurs recourent de plus en plus à des corpus de données vidéo, la réalisation d’un petit film peut représenter non seulement un retour pour les participants, mais aussi un moyen de valorisation du corpus, d’un type d’approche en linguistique et plus largement de l’activité du laboratoire de recherche. Grâce à leur forme agréable et à leur courte durée, les petits films sont conçus pour la diffusion et la valorisation des méthodologies et des recherches, ils sont accessibles pour un large public, même de non-experts. Cependant, il est nécessaire de réfléchir aux questions juridiques et déontologiques que soulève cette opération.

  9. "If only you were a boy…": Friendship and sexual identity in Mireille Best's Hymne aux Murènes.

    Science.gov (United States)

    Schechner, Stephanie

    2018-01-02

    While much French fiction devoted to lesbians focuses on romantic relationships, Mireille Best's (1943-2005) first novel, Hymne aux Murènes (Hymn to the Moray Eels) (1986), depicts a wide variety of relationships between the lesbian protagonist, Mila, and the other young women staying in a sanatorium of sorts for the treatment of an unnamed illness. In this all-female environment, Best depicts relationships between Mila and Paule, a closeted lesbian employee of the sanatorium; between Mila and young women like Josette and Lilli, who are somewhat attracted to Mila but, for the most part, do not act on this attraction; and between very close heterosexual friends (Nicoli and Nicola). In so doing, Best expands the reader's notion of friendship between women and blurs the lines between lesbians and heterosexuals, guiding the reader toward a more complex understanding of female friendship in general and lesbian friendship in particular. Throughout the novel, several characters express frustration about Mila's gender identity by saying, "If only you were a boy…" While Mila remains romantically frustrated, she develops close friendships with several young women, and Best thus conveys optimism about lesbians' ability to form friendships during adolescence and early adulthood, a time of life when, according to her characters, the boundaries between heterosexuality and lesbianism seem less rigid than they might be later in life. In this essay, I focus primarily on Best's first novel, but I include brief reflections on an earlier short story that echoes the presentation of lesbians and friendship found in the novel.

  10. ETUDES ANALYTIQUES : Détection des OGM : du libre choix des consommateurs aux études de biovigilance

    Directory of Open Access Journals (Sweden)

    Bertheau Yves

    2000-07-01

    Full Text Available Les récentes affaires de semences conventionnelles de colza et de maïs contaminées par des traces d’OGM ont à nouveau, s’il en était besoin, rappelé à notre bon souvenir les besoins en méthodes de détection et d’identification des OGM fiables et sensibles. Les développements se poursuivent, certes bien plus lentement qu’initialement espéré du fait du nombre important de facteurs à maîtriser et du caractère relativement inédit de ce travail. Concernant des matrices alimentaires variées, cette détection se heurte au manque de recul dans plusieurs domaines tels que celui de l’extraction et la purification d’acides nucléiques en quantité et en qualité. Bien que développées pour satisfaire aux besoins réglementaires européens concernant l’alimentation humaine, ces méthodes devraient être aisément applicables dans d’autres domaines concernés par les OGM (étude des transferts de gènes par flux pollinique, éventuels transferts horizontaux, suivi des acides nucléiques lors de l’ingestion.... Au-delà des OGM, les méthodes mises en œuvre devraient présenter un intérêt dans d’autres domaines comme la microbiologie, l’épidémiologie ou l’authentification des composants biologiques d’un produit.

  11. Les stratégies des investisseurs : des bords de ville aux bords de mer

    Directory of Open Access Journals (Sweden)

    Sophie Cueille

    2004-03-01

    Full Text Available L’architecture de la villégiature a un prix. Construire des villes nouvelles, qu’elles soient balnéaires, thermales ou périurbaines, induit la mise en place de réseaux ferroviaires et viaires, d’édifices dévolus à la détente, les soins ou les jeux, d’hôtels et de maisons. Quels sont les investisseurs qui engagent d’importants financements en ces lieux ? Personnages de la vie politique, industrielle et bancaire, le plus souvent parisiens, tous se saisissent des besoins de la nouvelle société bourgeoise montante, consommatrice de loisirs dès le milieu du XIXe siècle. Si certains projets peuvent être initialement teintés d’une certaine forme de philanthropie, toutes les opérations deviennent très vite de véritables entreprises lucratives. Sociétés civiles en tous genres, concessions et affermages, les formules d’investissement s’adaptent au produit où souvent se mêlent intérêts publics et privés. La réussite de tels projets suscite également le financement de campagnes publicitaires importantes : journaux, affiches et guides sont publiés pour faire accourir la clientèle visée et ainsi rapporter aux investisseurs les profits escomptés.

  12. Smart Sensing of the Aux. Feed-water Pump Performance in NPP Severe Accidents Using Advanced GMDH Method

    Energy Technology Data Exchange (ETDEWEB)

    No, Young Gyu; Seong, Poong Hyun [KAIST, Daejeon (Korea, Republic of)

    2016-05-15

    In order to develop and verify the models, a number of data obtained by simulating station black out (SBO) scenario for the optimized power reactor 1000 (OPR1000) using MARS code were used. Most of monitoring systems for component have been suggested by using the directly measured data. However, it is very difficult to acquire data related to safety-critical component' status. Therefore, it is necessary to develop the new method that combines the data-based equipped with learning system and data miming technique. Many data-based modeling methods have been applied successfully to nuclear engineering area, such as signal validation, plant diagnostics and event identification. Also, the data miming is the process of analyzing data from different perspectives and summarizing it into useful information. In this study, the smart sensing technique was developed using advanced group method of data handing (GMDH) model. The original GMDH is an inductive self organizing algebraic model. The advanced GMDH model is equipped with a fuzzy concept. The proposed advanced GMDH model enhances the original GMDH model by reducing the effect of outliers and noise. The advanced GMDH uses different weightings according to their importance which is specified by the fuzzy membership grade. The developed model was verified using SBO accident simulation data for the OPR1000 nuclear power plant acquired with MARS code. Also, the advanced GMDH model was trained using the simulated development data and verified with simulated test data. The development and test data sets were independent. The simulation results show that the performance of the developed advanced GMDH model was very satisfactory, as shown in Table 1. Therefore, if the developed model can be optimized using diverse and specific data, it will be possible to predict the performance of Aux. feed water pump accurately.

  13. Applying radiation

    International Nuclear Information System (INIS)

    Mallozzi, P.J.; Epstein, H.M.; Jung, R.G.; Applebaum, D.C.; Fairand, B.P.; Gallagher, W.J.; Uecker, R.L.; Muckerheide, M.C.

    1979-01-01

    The invention discloses a method and apparatus for applying radiation by producing X-rays of a selected spectrum and intensity and directing them to a desired location. Radiant energy is directed from a laser onto a target to produce such X-rays at the target, which is so positioned adjacent to the desired location as to emit the X-rays toward the desired location; or such X-rays are produced in a region away from the desired location, and are channeled to the desired location. The radiant energy directing means may be shaped (as with bends; adjustable, if desired) to circumvent any obstruction between the laser and the target. Similarly, the X-ray channeling means may be shaped (as with fixed or adjustable bends) to circumvent any obstruction between the region where the X-rays are produced and the desired location. For producing a radiograph in a living organism the X-rays are provided in a short pulse to avoid any blurring of the radiograph from movement of or in the organism. For altering tissue in a living organism the selected spectrum and intensity are such as to affect substantially the tissue in a preselected volume without injuring nearby tissue. Typically, the selected spectrum comprises the range of about 0.1 to 100 keV, and the intensity is selected to provide about 100 to 1000 rads at the desired location. The X-rays may be produced by stimulated emission thereof, typically in a single direction

  14. Radiating water

    International Nuclear Information System (INIS)

    Bakker, J.; Harle, N.; Heijkers, H.; Schoene, S.

    1987-04-01

    From a nuclear power plant in operation radioactivity is continuously effusing into the environment, through the chimney, cooling waters and the loss of solid waste. In this account attention is concentrated on tritium which enters, in the form of gas and tritiated water from nuclear power plants under 'normal' operation, the aquatic environment and which, because it can not be purified from the water and because its effluences in surface waters are larger than those of other radioactive waste products, forms the largest threat for the drinking-water supply. In ch. 1 the health risks of tritium are outlined. In particular the genetic risks are insufficiently known until now. In ch. 2 the amount of tritium effluences are estimated, which appears to be many times higher than was generally accepted until now. What does this imply for the Dutch surface waters? In ch. 3 the question of the source term is discussed and in ch. 4 the source term is translated into the effects upon the aquatic environment and especially upon the drinking-water supply. In ch. 5 advisements for policies are formulated. The policy of the Dutch government until now is viewed and nuclear power is judged on the base of three starting points of radiation policy. Therein the demands are included which are inevitable in order to protect the Dutch aquatic environment from a too large radioactivity burden. 91 refs.; 5 figs.; 1 table

  15. Synchrotron radiation

    International Nuclear Information System (INIS)

    Seddon, E.A.; Reid, R.J.

    1992-01-01

    Work at the Daresbury SRS has of necessity been interrupted this year (1991/92) due to the incorporation of Wiggler II. However, considerable beamtime was awarded before the shutdown and the major part of this appendix is concerned with the progress reports of the research undertaken then. The reports have been organised under the following broad headings: Molecular Science (19 papers), Surface and Materials Science (169 papers), Biological Science (85 papers), Instrumental and Technique Developments (13 papers) and Accelerator Physics (3 papers). It is hoped that in time the number of contributions on accelerator physics will grow to reflect the in-house activity on, for example, accelerator improvement and design. The research reports are preceded by the Annual Report of the Synchrotron Radiation Facilities Committee, which outlines the research highlights identified by that Committee (also included are details of the current membership of the SRFC and the chairmen of the Beamtime Allocation Panels). Following the reports are the specifications for the beamlines and stations. This year Section 3 contains 289 reports (nearly 100 more than last year) and the number of publications, generated by scientists and engineers who have used or are associated with Daresbury Laboratory facilities, has topped 500 for the first time. (author)

  16. Radiation detector

    International Nuclear Information System (INIS)

    Hasegawa, Misao; Sagawa, Hiroshi; Kakimoto, Akira.

    1996-01-01

    Drains of laundry, shower and hand-washing in a nuclear power plant are collected in a cleaning water drain tank and sent to a cleaning water drain evaporation device. The liquid is highly condensed and burnt here. Evaporated water is sent to a cleaning water drain monitor tank and discharged out of the system. A sample taking port and a monitoring branched pipe are disposed upstream of the cleaning water monitor tank. A pH meter and an electroconductivity meter are connected to a branched pipe of the evaporated water, and the outputs therefrom are sent to an alarm device. The alarm device generates an alarm when the output of the pH meter is greater than a determined first appropriate value within a range from 9.5 to 10.0 and the output of the electroconductive meter is also greater than a predetermined second appropriate value within a range from 10 to 20μS/cm. A highly reliable radiation monitor with low cost and without erroneous alarm can thus be obtained. (I.N.)

  17. Foundations of radiation physics and radiation protection. 5. ed.

    International Nuclear Information System (INIS)

    Krieger, Hanno

    2017-01-01

    The following topics are dealt with: Types of radiation and radiation fields, the atomic structure, radioactive decays, decay law, natural and artificial radioactivity, interactions of ionizing photon radiation, attenuation of neutral-particle beams, interactions of neutron radiation, interactions of charged particles, ionization and energy transfer, radiation doses, radiation protection phantoms, foundations of the radiation biology of cells, effects and risks of ionizing radiation, radiation expositions of men with ionizing radiation, radiation protection law, practical radiation protection against ionizing radiations, radiation eposures in medical radiology. (HSI)

  18. Working safely with ionising radiation

    International Nuclear Information System (INIS)

    McDowell, D.J.

    1990-01-01

    A small leaflet provides information on working safely with ionizing radiation. Topics covered include the types of radiation, radiological units, external radiation, contamination and internal radiation, methods of protection form radiation, radiation monitors, protective clothing for contamination, personal dosemeters, radiation dose limits for classified workers and finally the Ionising Radiations Regulations 1985. (UK)

  19. Assimilation ou fidélité aux valeurs du Vieux Monde ? La nouvelle et sa représentation de l’immigration juive aux Etats-Unis

    Directory of Open Access Journals (Sweden)

    Crystel Pinçonnat

    2001-06-01

    Full Text Available Quel modèle adopter : le respect de la tradition ou la voie de l’américanisation ? A partir de quelques nouvelles traduites du yiddish (New-Yorkaises de Lamed Shapiro, Le Fils qui venait d’Amérique d’Isaac Bashevis Singer et de l’américain (L’Oiseau-juif de Bernard Malamud, Eli le fanatique de Philip Roth et La Voix la plus forte de Grace Paley, cet article se propose d’étudier la représentation de la déchirure qui hante la communauté juive ashkénaze émigrée aux Etats-Unis : son tiraillement entre fidélité au passé et adhésion au présent.What model should be adopted: being respectful of tradition or becoming Americanized? A lot of Yiddish or American short stories raise the issue: New-York’s Women by Lamed Shapiro, The Son Who Came from America by Isaac Bashevis Singer,The Jewbird by Bernard Malamud Eli, The Fanatic by Philip Roth, and The Loudest Voice by Grace Paley. This article examines the representation these texts offer of the ongoing conflict within the Ashkenaze Jewish community, who came to the United States, torn between its past and its present, resistance and assimilation.¿Qué modelo adoptar : el respeto de la tradición o la vía de la americanización ? A partir de algunas novelas cortas traducidas del yiddish (New York’s Women de Lamed Shapiro, The Son Who Came from America de Isaac Bashevis Singer y del americano (The Jewbird de Bernard Malamud, Eli, The Fanatic de Philp Roth, y The Loudest Voice de Grace Paley, este artículo analiza la representación del dilema que desgarra a la comunidad judía asquenazie inmigrada a los Estados Unidos : la elección entre la fidelidad al pasado y la adhesión al presente.

  20. Renforcement des données probantes et des mesures relatives aux partenariats plurisectoriels en santé publique : un projet de recherche-action

    Directory of Open Access Journals (Sweden)

    C. D. Willis

    2016-01-01

    Full Text Available Introduction : L'initiative Partenariats plurisectoriels de l'Agence de la santé publique du Canada, gérée par le Centre de prévention et de contrôle des maladies chroniques (CPCMC, réunit différents partenaires en vue de concevoir, de mettre en œuvre et de faire progresser des approches novatrices visant à améliorer la santé de la population. Cet article décrit l'évolution et les premières priorités d'un projet de recherche-action (stratégie d'apprentissage et d'amélioration dont l'objectif est de faciliter l'amélioration continue de l'initiative de partenariat du CPCMC et de contribuer aux données probantes sur les partenariats plurisectoriels. Méthodologie : La stratégie d'apprentissage et d'amélioration du CPCMC pour les partenariats plurisectoriels repose sur les consultations avec le personnel et la haute direction du CPCMC et sur l'examen de cadres conceptuels liés aux partenariats plurisectoriels. Les consultations ont porté sur l'élaboration de l'initiative plurisectorielle, ses obstacles, ses facteurs de réussite et ses indicateurs d'efficacité. Nous avons fait une revue de littérature et consulté la littérature grise en appliquant une stratégie de recherche systématique puis nous avons résumé nos conclusions sous forme de comptes rendus. Résultats : Les consultations et l'examen de la littérature ont souligné l'importance de comprendre l'incidence des partenariats, d'élaborer une vision commune, de mettre en œuvre un système partagé de mesures et de créer des occasions d'échange de connaissances. C'est dans cette perspective que nous proposons une stratégie d'apprentissage et d'amélioration en six volets : 1 donner la priorité aux besoins en matière d'apprentissage, 2 relier les besoins aux données probantes, 3 utiliser des méthodes de collecte de données pertinentes, 4 analyser et synthétiser ces données, 5 fournir une rétroaction aux membres et aux équipes du CPCMC et 6 agir. Les

  1. Ionizing radiation in hospitals

    International Nuclear Information System (INIS)

    This booklet is concerned with radiation safety of radiologist and other hospital personnel. Part 1 deals with properties of radiation in general (especially of ionizing radiation). In part 2, different applications of radiation in hospitals are discussed. Part 3 indicates what to do to make improvements to not totally safe situations in hospitals. (Auth./G.J.P.)

  2. CHERENKOV RADIATION DETECTOR

    African Journals Online (AJOL)

    ES Obe

    1981-03-01

    Mar 1, 1981 ... the number of quanta emitted per unit radiation length of radiator in frequency and + d. RAR. = The radiation length of beta particles for laboratory energies in aluminum (in g cm-2). XC. = The critical distance in the radiator. ηo. = The absolute quantum efficiency of photo cathode at peak of the response ...

  3. Detection of Terahertz Radiation

    DEFF Research Database (Denmark)

    2015-01-01

    The present invention relates to a system for detecting terahertz radiation, a camera device, and a method for detecting terahertz radiation.......The present invention relates to a system for detecting terahertz radiation, a camera device, and a method for detecting terahertz radiation....

  4. Radiation protection to firemen

    International Nuclear Information System (INIS)

    Almeida, E.S. de.

    1985-01-01

    The basic Knowledge about ionizing radiation oriented for firemen, are presented. The mainly damage and effects caused by radiation exposure as well as the method of radiation protection are described in simple words. The action to be taken in case of fire involving radiation such as vehicles transporting radioactive materials are emphasized. (author)

  5. Gravitation radiation observations

    OpenAIRE

    Glass, E. N.

    2017-01-01

    The notion of gravitational radiation begins with electromagnetic radiation. In 1887 Heinrich Hertz, working in one room, generated and received electromagnetic radiation. Maxwell's equations describe the electromagnetic field. The quanta of electromagnetic radiation are spin 1 photons. They are fundamental to atomic physics and quantum electrodynamics.

  6. Comprehensive genome-wide analysis of the Aux/IAA gene family in Eucalyptus: evidence for the role of EgrIAA4 in wood formation.

    Science.gov (United States)

    Yu, Hong; Soler, Marçal; San Clemente, Hélène; Mila, Isabelle; Paiva, Jorge A P; Myburg, Alexander A; Bouzayen, Mondher; Grima-Pettenati, Jacqueline; Cassan-Wang, Hua

    2015-04-01

    Auxin plays a pivotal role in various plant growth and development processes, including vascular differentiation. The modulation of auxin responsiveness through the auxin perception and signaling machinery is believed to be a major regulatory mechanism controlling cambium activity and wood formation. To gain more insights into the roles of key Aux/IAA gene regulators of the auxin response in these processes, we identified and characterized members of the Aux/IAA family in the genome of Eucalyptus grandis, a tree of worldwide economic importance. We found that the gene family in Eucalyptus is slightly smaller than that in Populus and Arabidopsis, but all phylogenetic groups are represented. High-throughput expression profiling of different organs and tissues highlighted several Aux/IAA genes expressed in vascular cambium and/or developing xylem, some showing differential expression in response to developmental (juvenile vs. mature) and/or to environmental (tension stress) cues. Based on the expression profiles, we selected a promising candidate gene, EgrIAA4, for functional characterization. We showed that EgrIAA4 protein is localized in the nucleus and functions as an auxin-responsive repressor. Overexpressing a stabilized version of EgrIAA4 in Arabidopsis dramatically impeded plant growth and fertility and induced auxin-insensitive phenotypes such as inhibition of primary root elongation, lateral root emergence and agravitropism. Interestingly, the lignified secondary walls of the interfascicular fibers appeared very late, whereas those of the xylary fibers were virtually undetectable, suggesting that EgrIAA4 may play crucial roles in fiber development and secondary cell wall deposition. © The Author 2015. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For permissions, please email: journals.permissions@oup.com.

  7. Radiation treatment of foodstuffs

    International Nuclear Information System (INIS)

    Luther, T.; Huebner, G.

    1990-10-01

    In addition to fundamental demands on radiation and safety engineering of irradiation facilities, the necessity arises to optimize irradiation conditions by using facilities to capacity and thus reducing irradiation costs. The following subjects are dealt with in detail: rehabilitation of a pilot plant for radiation treatment of onions; examination of radiation resistance of components and equipment parts of food irradiation facilities; chemical dosimetry; relative measurement of the intensity of radioactive sources; thermo- and chemiluminescence to prove irradiation of foodstuffs; radiation induced sprout inhibition of potatoes; laboratory tests of delayed maturation of tomatoes; radiation treatment of strawberries; radiation treatment of forage; radiation induced sprout inhibition of acid-treated onions; radiation treatment of starch and potatoe products; radiation treatment of cosmetics; the universal radiation source UNI 88/26 for gamma irradiation facilities; microbiological aspects of food irradiation, and introduction of chicken irradiation on an industrial scale. (BBR) [de

  8. Chemical and radiation injuries

    International Nuclear Information System (INIS)

    Hugo, M.J.

    1981-01-01

    The paper is a discussion of radiation injuries and the treatment thereof. Radiation injuries are mainly caused as a result of nuclear leaks or nuclear bomb explosions. Such an explosion is usually accompanied by a light flash, noise, heat radiation and nuclear radiation which can all caurse various types of injuries. The general effect of radioactive radiation is discussed. The seriousness of the situation where the whole body was exposed to nuclear radiation, depends on the total radiation dose received and varies from person to person. The progress of radiation sickness is described. Mention is also made of long term radiation effects. The emergency treatment of the injured before specialised aid is available, is discussed. The primary aim of treatment is to save life and to prevent further injuries and complications. Injured people must be removed as far as possible from the point of maximum radiation. Attention must also be given to decontamination

  9. Trigonometria como uma ferramenta no auxílio do cálculo de distâncias inacessíveis

    OpenAIRE

    Leite, Lélio Antônio de Oliveira

    2015-01-01

    Este trabalho tem como objetivo principal fornecer material de apoio para os professores e alunos de matemática dos Ensinos Fundamental e Médio e o foco são as aplicações da trigonometria. Iniciamos com algumas definições e resultados sobre esse tema e abordamos diversas situações problemas, visando exemplificar para o leitor a importância da trigonometria como uma ferramenta no auxílio do cálculo de distâncias inacessíveis. This work aims to provide background material for math teachers a...

  10. Le recours aux modeles dans l'enseignement de la biologie au secondaire : Conceptions d'enseignantes et d'enseignants et modes d'utilisation

    Science.gov (United States)

    Varlet, Madeleine

    Le recours aux modeles et a la modelisation est mentionne dans la documentation scientifique comme un moyen de favoriser la mise en oeuvre de pratiques d'enseignement-apprentissage constructivistes pour pallier les difficultes d'apprentissage en sciences. L'etude prealable du rapport des enseignantes et des enseignants aux modeles et a la modelisation est alors pertinente pour comprendre leurs pratiques d'enseignement et identifier des elements dont la prise en compte dans les formations initiale et disciplinaire peut contribuer au developpement d'un enseignement constructiviste des sciences. Plusieurs recherches ont porte sur ces conceptions sans faire de distinction selon les matieres enseignees, telles la physique, la chimie ou la biologie, alors que les modeles ne sont pas forcement utilises ou compris de la meme maniere dans ces differentes disciplines. Notre recherche s'est interessee aux conceptions d'enseignantes et d'enseignants de biologie au secondaire au sujet des modeles scientifiques, de quelques formes de representations de ces modeles ainsi que de leurs modes d'utilisation en classe. Les resultats, que nous avons obtenus au moyen d'une serie d'entrevues semi-dirigees, indiquent que globalement leurs conceptions au sujet des modeles sont compatibles avec celle scientifiquement admise, mais varient quant aux formes de representations des modeles. L'examen de ces conceptions temoigne d'une connaissance limitee des modeles et variable selon la matiere enseignee. Le niveau d'etudes, la formation prealable, l'experience en enseignement et un possible cloisonnement des matieres pourraient expliquer les differentes conceptions identifiees. En outre, des difficultes temporelles, conceptuelles et techniques peuvent freiner leurs tentatives de modelisation avec les eleves. Toutefois, nos resultats accreditent l'hypothese que les conceptions des enseignantes et des enseignants eux-memes au sujet des modeles, de leurs formes de representation et de leur approche

  11. L’INVESTISSEMENT EN BOURSE : LES NORMES DE LA FINANCE ISLAMIQUE APPLIQUEES AUX VALEURS DE LA PLACE BOURSIERE DE PARIS (CAC 40 et SBF 250)

    OpenAIRE

    EL KHAMLICHI, ABDELBARI

    2010-01-01

    En finance islamique, l’investissement en bourse est autorisé sous certaines conditions. Le choix des valeurs boursières dans lesquelles il serait possible d’investir conformément à la Charia se fait selon des critères financiers et extra financiers. Ainsi, il convient de s’intéresser aux secteurs d’activité de l’entreprise ainsi qu’à sa structure financière. Dans la pratique, il revient à un comité Charia, composé de jurisconsultes spécialistes de la loi islamique, de vérifier périodiquement...

  12. Un projet de développement forestier au Niger : problèmes d'adaptation des objectifs initiaux aux contraintes de réalisation

    OpenAIRE

    Clément, Jean

    1986-01-01

    Comme tous les pays du Sahel, le Niger est affronté à de graves problèmes de désertification et de déboisement dont les causes sont diverses : sécheresses successives,intensification du paturage provoquée par l'accroissement des troupeaux, consommation accrue de bois de feu... Sur la base d'une population totale de 6 OOO OOO habitants, la consommation de bois de feu peut être estimée à environ 4 OOO OOO m3 qu'il faut comparer aux 3 OOO OOO m3 d'accroissement en volume annuel des peuplements n...

  13. Resenha de: Applications de la photographie aérienne aux recherches des Sciences humaines dans le régions tropicales

    Directory of Open Access Journals (Sweden)

    Eurípedes Simões de Paula

    1965-03-01

    Full Text Available JHURAULT (J.. — Applications de la photographie aérienne aux recherches des Sciences humaines dans le régions tropicales. Coleção "Mémoires de photo-interprétation" dirigida por R. Chevalier. Publicação da "École Pratique des Hautes Études" (6e Section . Paris. S.E.V.P.E.N. 1964. 111 páginas de texto, 7 figuras e 19 pranchas fora do texto, 4 cartas coloridas, 8 fotos estereoscópicas.

  14. La participation des personnes utilisatrices aux exercices de planification et d'organisation des services de santé mentale au Québec

    Directory of Open Access Journals (Sweden)

    Michèle Clément

    2013-10-01

    Full Text Available Cet article documente la manière dont s'est renouvelé et s'est transformé au fil du temps le projet de faire participer les usagers aux exercices de planification et d'organisation des services de santé mentale au Québec (Canada. Pour ce faire, les auteurs reviennent sur l'ensemble des documents ministériels qui ont traité de cette question et dégage, pour les principaux moment-clés, les principales modalités de participation des usagers.

  15. Cartographie de la vulnérabilité globale d'une population citadine face aux risques naturels: le cas de Manizales

    Directory of Open Access Journals (Sweden)

    Anne-Catherine CHARDON

    1994-12-01

    Full Text Available Cette méthode cartographique sert à évaluer la vulnérabilité de la population d’une grande ville andine (Manizales, Colombie, exposée aux séismes et à de fréquents glissements de terrain. Sept facteurs naturels et huit facteurs socio-économiques, mesurés à l’échelle du quartier, sont intégrés, avec d’autre facteurs géographiques, dans une carte de vulnérabilité globale.

  16. De la production fruitière intégrée à la gestion écologique des vergers aux Antilles

    OpenAIRE

    Lavigne, Claire; Lesueur-Jannoyer, M.; de Lacroix, S.; Chauvet, G.; Lavigne, A.; Dufeal, D.

    2011-01-01

    La forte anthropisation aux Antilles françaises, la pression des monocultures de banane et de canne à sucre, et l'usage immodéré de pesticides, ont abouti à la pollution persistante d'une partie importante des sols de la SAU ainsi que des eaux de rivière et des nappes phréatiques. Si, dans les dix dernières années, la recherche de moyens de lutte biologique contre les insectes a été prioritaire, la lutte contre les adventices continue d'être un problème central pour les arboriculteurs qui ne ...

  17. Les Nigérianes améliorent leur sort grâce aux légumes indigènes

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

    à rester en santé. Malgré ce potentiel, la recherche n'a pas accordé la priorité aux espèces de légumes indigènes pour améliorer la sécurité alimentaire, la nutrition et les ... vue d'améliorer la sécurité alimentaire en milieu rural a porté sur la mise au .... germination, la lutte biologique contre les ravageurs et le tuteurage de ...

  18. L' éducation du patient aux Pays-Bas: une intégration importante dans la politique de santé.

    NARCIS (Netherlands)

    Bensing, J.M.; Visser, A.P.

    2000-01-01

    Aux Pays-Bas, l'éducation du patient s'est fortement développée au cours des trente dernières années tant à l'hôpital qu'en soins de santé primaires. Après des années 'pionière' au début des annéees 70, la pratique de l'éducation du patient a été introduite dans les standards de qualité et dans

  19. Pratiques documentaires aux Services industriels de Genève (SIG): vers une prise de conscience de la gestion documentaire de l'entreprise

    OpenAIRE

    Boussières, Eric; Chanoine, Elisabeth; Estermann-Wiskott, Yolande

    2012-01-01

    Certains collaborateurs des Services Industriels de Genève sont conscients qu’une gestion adaptée de la documentation constitue une valeur ajoutée pour l’entreprise. Pour cela, les SIG envisagent de créer une structure documentaire. Ce travail a pour objectifs de fournir aux SIG un état détaillé des collections existantes : monographies, périodiques, documentation technique, etc., des pratiques et des différents circuits documentaires présents dans l’entreprise. En plus, la présentation de de...

  20. Les centres de la petite enfance : soutien aux parents travailleurs ou lieu d’intervention auprès des familles ?

    OpenAIRE

    Deret, Anne

    2016-01-01

    La participation de l’État québécois aux services de garde, tant sur la plan du financement que de l’orientation éducative depuis les nouvelles dispositions de la politique familiale de 1997, est marquée par une orientation de plus en plus importante vers la prévention et l’intervention auprès des familles (particulièrement des familles dites à risque). Cet article rappelle comment cette orientation a pris place progressivement depuis les années 1970 dans les garderies du Québec et montre le ...

  1. Radiation protection forum

    International Nuclear Information System (INIS)

    Cabral, W.

    2010-01-01

    The National Director of the Nuclear Regulatory Authority and Radiation Protection of Uruguay in the first forum for radiation protection set out the following themes: activity of regulatory body, radiation safety, physical security, safeguards, legal framework, committed substantive program, use of radiation, risks and benefits, major sources of radiation, the national regulatory framework, national inventory of sources, inspections, licensing, import and export of sources control , radioactive transport, materials safety, agreements, information and teaching, radiological emergencies and prompt response.

  2. Preparative radiation chemistry

    International Nuclear Information System (INIS)

    Drawe, H.

    1978-01-01

    Preparative synthesis of compounds with the aid of radiation chemistry is increasingly used in laboratories as well as on a technical scale. A large number of new compounds has been produced with the methods of radiation chemistry. With the increasing number of available radiation sources, also the number of synthesis metods in radiation chemistry has increased. This paper can only briefly mention the many possible ways of synthesis in radiation chemistry. (orig./HK) [de

  3. Radiation protection instrument 1993

    International Nuclear Information System (INIS)

    1993-04-01

    The Radiation Protection Instrument, 1993 (Legislative Instrument 1559) prescribes the powers and functions of the Radiation Protection Board established under the Ghana Atomic Energy Commission by the Atomic Energy Commission (Amendment) Law, 1993 (P.N.D.C. Law 308). Also included in the Legislative Instrument are schedules on control and use of ionising radiation and radiation sources as well as procedures for notification, licensing and inspection of ionising radiation facilities. (EAA)

  4. Un territoire interface aux fonctionnements multiscalaires : l’espace transfrontalier franco-italo-monégasque

    Directory of Open Access Journals (Sweden)

    Fusco G.

    2012-10-01

    Full Text Available L’espace franco-italo-monégasque est un exemple d’interface caractérisé par des interactions transfrontalières à différentes échelles. Plus précisément, le micro-État monégasque constitue le pivot de cet espace interface, de part ses spécificités territoriales et fiscales, générant à la fois flux et régulations. Cette communication propose d’analyser les interfaces de différentes natures produites par cet espace transfrontalier particulier, à travers le prisme de l’espace-temps. Effectivement, toute interface verticale, caractérisée par des processus qui s’articulent à différents niveaux d’organisation, conduit à une prise en compte de multiples échelles et de leur jeu. Ici, les échelles analysées vont de l’espace transfrontalier de proximité (micro-échelle à l’espace transrégional transfrontalier (macro-échelle et sont définies à partir des flux qu’elles produisent selon de multiples « attracteurs ». Nous proposons d’envisager ces flux sous l’angle de l’espace-temps autour de Monaco, produit par les temps de déplacement routier, le réseau autoroutier étant la colonne vertébrale de ces interactions. L’objectif de cet article, proposant un exemple géographique du concept d’interface, est double. D’une part, il propose une approche d’analyse des interactions transfrontalières combinant deux corpus théoriques, celui des interfaces et celui de l’espace-temps. D’autre part, dans une optique plus opérationnelle de l’analyse des interfaces, il fournit un cas d’application qui renvoie aux défis de la représentation graphique de dynamiques complexes (représentation multiscalaire, schématisation des interactions, cartographie de processus spatio-temporels.

  5. Mosaïques de pierres dures : de la manufacture de Florence aux cours d’Europe

    Directory of Open Access Journals (Sweden)

    Annamaria Giusti

    2012-09-01

    Full Text Available Crée par Ferdinand Ier de Médicis en 1588, l���Opificio delle Pietre Dure a consacré son activité à la production de commessi et de mosaïques de pierres dures. Par leur fantaisie, leur perfection technique et la préciosité de leur matériau, ces œuvres sont particulièrement appréciées au-delà même des frontières du Grand-Duché de Toscane. En effet, les Médicis en ont fait cadeau aux souverains des autres cours d’Europe. Leur politique a provoqué une véritable émulation : Rodolphe II d’Augsbourg, enthousiasmé par les travaux qu’il commanda lui-même à Florence, décida le premier d’appeler des artisans florentins à Prague pour y créer une manufacture. Il est suivi par Louis XIV qui forme un atelier de pierres dures au sein des Gobelins, tandis qu’au xviiie siècle, Charles de Bourbon fonde deux manufactures sur le modèle de Florence, dans le royaume de Naples et en Espagne. Les mosaïques florentines continuent à jouir du prestige international sous le règne des Lorena (1737-1799. Pendant tout le xixe siècle, alors que Florence n’est plus le siège de la cour, l’Opificio compte parmi ses commanditaires Louis II de Bavière et le Tsar de Russie. Ces commandes sont les dernières d’une manufacture royale qui a duré pendant trois siècles. Désormais l’Opificio se consacre à la restauration des œuvres d’art.

  6. Des Connaissances Aux Politiques

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

    Dans beaucoup de pays en développement, la faible capacité du gouvernement est pratiquement la définition des problèmes de développement du pays. ...... Promouvoir l'échange des connaissances émanant des recherches ainsi que des outils et des résultats, et le dialogue entre les pays, institutions et donateurs.

  7. Radiation physics, biophysics, and radiation biology

    International Nuclear Information System (INIS)

    Hall, E.J.; Zaider, M.

    1991-05-01

    Research at the Radiological Research Laboratory is a blend of physics, chemistry, and biology, involving research at the basic level with the admixture of a small proportion of pragmatic or applied research in support of radiation protection and/or radiotherapy. Current research topics include: oncogenic transformation assays, mutation studies involving interactions between radiation and environmental contaminants, isolation, characterization and sequencing of a human repair gene, characterization of a dominant transforming gene found in C3H 10T1/2 cells, characterize ab initio the interaction of DNA and radiation, refine estimates of the radiation quality factor Q, a new mechanistic model of oncogenesis showing the role of long-term low dose medium LET radiation, and time dependent modeling of radiation induced chromosome damage and subsequent repair or misrepair

  8. Radiation versus radiation: nuclear energy in perspective

    International Nuclear Information System (INIS)

    Gonzalez, A.J.; Anderer, J.

    1989-01-01

    This paper seeks to provide a proper perspective on radiation exposures from nuclear energy. Instead of comparing these exposures with other pollutants, natural and man-made, it assesses the radiation doses that result from the human environment and from the entire fuel cycle associated with nuclear generated electricity. It explores radiation versus radiation, not only in terms of absolute levels but, more importantly, of the enormous variability characterizing many radiation sources. The quantitative findings and their implications are meant to contribute to a balanced understanding of the radiological impact of nuclear energy, and so to help to bridge the information gap that is perceived to exist on this issue. The 1988 Unscear report and its seven scientific annexes provide an authoritative and dispassionate factual basis for examining radiation levels from all sources, natural and man-made. It is the main source for this paper. (author)

  9. From radiation chemistry to radiation engineering

    International Nuclear Information System (INIS)

    Ballantine, D.S.

    1976-01-01

    During the past 25 years there has been a steady recognition that radiation in the form of electrons or gamma rays can offer positive advantages as a processing technology. Underlying this process industry, and largely responsible for its success, are significant contributions from the field of basic and applied radiation chemistry. In this paper it is attempted to relate fundamental radiation chemistry studies directly to the practical engineering applications

  10. Staff radiation exposure in radiation diagnostics

    International Nuclear Information System (INIS)

    Khakimova, N.U.; Malisheva, E.Yu.; Shosafarova, Sh.G.

    2010-01-01

    Present article is devoted to staff radiation exposure in radiation diagnostics. Data on staff radiation exposure obtained during 2005-2008 years was analyzed. It was found that average individual doses of staff of various occupations in Dushanbe city for 2008 year are at 0.29-2.16 mSv range. They are higher than the average health indicators but lower than maximum permissible dose. It was defined that paramedical personnel receives the highest doses among the various categories of staff.

  11. Mushrooms and the radioactivity coming from Tchernobyl fallout; Les champignons et la radioactivite due aux retombees de Tchernobyl

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    In France, since the accident of Tchernobyl in 1986, the radiation regular monitoring of the food and the environment shows that the mushrooms present cesium 137 content levels upper than all the other agricultural products. This paper presents and explains the today and future situation.

  12. Exposition aux rayonnements d'origine naturelle tellurique et cosmique : les études franco-tchèques

    Czech Academy of Sciences Publication Activity Database

    Spurný, František; Bottollier-Depois, J. F.; Decossas, J. L.

    2007-01-01

    Roč. 41, č. 5 (2007), s. 195-208 ISSN 0033-8451 R&D Projects: GA MŠk 1P05OC032 Institutional research plan: CEZ:AV0Z10480505 Keywords : natural radiation background * aircraft crew exposure * track-etch detectors * silicon detector Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders

  13. Guideline Implementation: Radiation Safety.

    Science.gov (United States)

    Fencl, Jennifer L

    2015-12-01

    Because radiologic technology is used in a variety of perioperative procedures and settings, it is essential for perioperative RNs to be knowledgeable of the risks related to radiation and the ways to adequately protect patients and health care providers from unintended radiation exposure. The updated AORN "Guideline for radiation safety" provides guidance on preventing injury from ionizing radiation exposure during therapeutic, diagnostic, and interventional procedures. This article focuses on key points of the guideline to help perioperative personnel practice radiation safety. The key points address the requirements for an organization's radiation safety program, measures used to keep radiation exposure as low as reasonably achievable, proper handling and testing of radiation protection devices, and considerations for protecting employees and patients who are pregnant and who will be exposed to radiation. Perioperative RNs should review the complete guideline for additional information and for guidance when writing and updating policies and procedures. Copyright © 2015 AORN, Inc. Published by Elsevier Inc. All rights reserved.

  14. New Finnish radiation law

    International Nuclear Information System (INIS)

    Niittyla, A.

    1992-01-01

    The new Finnish Radiation Act will enter into force on 1.1.1992. The Act aims to protect man's health against the harmful effects of radiation. The Act applies to the utilization of ionising radiation and natural radiation as well as non-ionising radiation. It emphasises the fact that a licensed organization or entrepreneur carrying out a practice which causes radiation exposure is responsible for the safety of the activity. The organization or entrepreneur in question is also obliged to take care of radioactive waste. The provisions of the Radiation Act which apply to monitoring of worker exposure are also applied to the use of nuclear energy. Activities involving the use of radiation and the use of nuclear energy are regulated by one authority, the Finnish Centre for Radiation and Nuclear Safety. (author)

  15. Détermination de quelques paramètres hématologiques chez les agriculteurs exposés aux pesticides dans la région de Tlemcen

    OpenAIRE

    SAIDI, Fatima Zohra

    2015-01-01

    Résumé Les pesticides représentent une large gamme de produits utilisés de façon très variable. Les agriculteurs sont aujourd'hui le groupe le plus exposé aux risques de contact avec les pesticides. L'objectif de notre travail consiste à mettre en évidence les altérations hématologiques chez les hommes agriculteurs disposés aux pesticides comparés aux hommes témoins. Un prélèvement sanguin est réalisé afin de déterminer quelques paramètres hématologiques (FNS, numérations cellu...

  16. Environmental radiation and exposure to radiation

    International Nuclear Information System (INIS)

    1981-02-01

    Compared to 1977 the exposure to radiation of the population of the Federal Republic of Germany from both natural and artificial radiation sources has not greatly charged. The amin part of exposure to natural radiation is caused by environmental radiation and by the absorption of naturally radioactive substances into the body. Artificial exposure to radiation of the population is essentially caused by the use of ionizing rays and radioactive substances in medicine. When radioactive materials are released from nuclear facilities the exposure to radiation of the population is only very slightly increased. The real exposure to radiation of individual people can even in the worst affected places, have been at most fractions of a millirem. The exposure to radiation in the worst afected places in the area of a hard-coal power station is higher than that coming from a nuclear power station of the same capacity. The summation of all contributions to the exposure of radiation by nuclear facilities to the population led in 1978 in the Federal Republic of Germany to a genetically significant dose of clearly less than 1 millerem per year. The medium-ranged exposure to radiation by external radiation effects through professional work was in 1978 at 80 millirems. No difference to 1977. The contribution of radionuclide from the fallout coming from nuclear-weapon tests and which has been deposited in the soil, to the whole-body dose for 1978 applies the same as the genetically significant dose of the population with less than 1 millirem. (orig./HP) [de

  17. Radiation effects on polymers

    International Nuclear Information System (INIS)

    Clough, R.L.; Shalaby, S.W.

    1991-01-01

    This book covers polymer radiation effects to be available in more than a decade. This volume reviews the fundamental chemistry and physics of polymer-radiation interaction and examines recent progress in most major areas of the field. Its 38 chapters, cover: fundamentals of polymer radiation chemistry; technological applications of radiation to polymers (including radiation processing; radiation curing; sterilization; cross-linking, polymerization, grafting, x-ray resists, and others); and degradation of stabilization of irradiated polymers (including nuclear plants, scintillation detectors for particle physics, and others)

  18. Introduction to radiation hygiene

    International Nuclear Information System (INIS)

    Huyskens, Ch.J.

    1978-08-01

    This document is to introduce personnel who come into contact with any radiological activities to different aspects of radiation hygiene. The basic theory of radiation physics is given and units and dose equivalents are discussed. The biological effects of ionizing radiations are described and risk analysis is introduced. The various sources of radiation to which the population is exposed are outlined. Saftey standards and legislation regarding radiation hygiene are described and the various methods and instruments for measuring radiation are given. Dosimetry and safety precautions and measures are finally discussed. (C.F.)

  19. Radiation protection in Bolivia

    International Nuclear Information System (INIS)

    Miranda Cuadros, A.A.

    2001-01-01

    Radiation protection in Bolivia has gone through a number of stages. Initially, in the 1970s, the focus was mainly on the analysis of environmental sources resulting from the nuclear tests carried out by France in the Pacific Ocean. Subsequently, the focus switched somewhat to radiation protection in connection with the mining of uranium and in the area of public health. During the third stage, radiation protection in other areas became important as the use of radiation sources was introduced. Finally, during the present -- fourth -- stage, radiation protection regulations are being introduced and mechanisms for the control of radiation sources are being established. (author)

  20. Radiation Control Regulation 1993

    International Nuclear Information System (INIS)

    1993-01-01

    This Regulation (No. 434-1993) was made in pursuance of the Radiation Control Act 1990 and replaces the Active Substances Regulations 1959 repealed by the Act. It entered into force on 1 September 1993. The Regulation specifies that the technical radiation protection definitions have the same meaning as in the 1990 recommendations. The Regulation provides for the licensing of persons to use radioactive substances and radiation apparatus. It prescribes activities which may only be carried out by an accredited radiation expert and regulates the use of radiation apparatus and radioactive substances as well as the disposal and transport of radiation apparatus and radioactive substances. (NEA)

  1. Plutonium radiation surrogate

    Science.gov (United States)

    Frank, Michael I [Dublin, CA

    2010-02-02

    A self-contained source of gamma-ray and neutron radiation suitable for use as a radiation surrogate for weapons-grade plutonium is described. The source generates a radiation spectrum similar to that of weapons-grade plutonium at 5% energy resolution between 59 and 2614 keV, but contains no special nuclear material and emits little .alpha.-particle radiation. The weapons-grade plutonium radiation surrogate also emits neutrons having fluxes commensurate with the gamma-radiation intensities employed.

  2. Focus radiation protection

    International Nuclear Information System (INIS)

    Ebermann, Lutz

    2016-01-01

    The publication of the Bundesamt fuer Strahlenschutz on radiation protection covers the following issues: (i) exposure from natural sources: health hazard due to radon, radiation protection in residential homes, radon in Germany, natural raw materials in industrial processes; (ii) clearance of radioactive wastes: clearance in the frame of nuclear power plant dismantling, the situation in Germany and Europe; (iii) emergency management: principles of radiation protection, fictive sequence of accident events; (iiii) other actual radiation protection topics: more limits - more protection? radiation protection in medicine, occupational radiation protection.

  3. Largely enhanced photocatalytic activity of Au/XS2/Au (X = Re, Mo) antenna-reactor hybrids: charge and energy transfer.

    Science.gov (United States)

    Chen, Kai; Ding, Si-Jing; Luo, Zhi-Jun; Pan, Gui-Ming; Wang, Jia-Hong; Liu, Jia; Zhou, Li; Wang, Qu-Quan

    2018-02-22

    An antenna-reactor hybrid coupling plasmonic antenna with catalytic nanoparticles is a new strategy to optimize photocatalytic activity. Herein, we have rationally proposed a Au/XS 2 /Au (X = Re, Mo) antenna reactor, which has a large Au core as the antenna and small satellite Au nanoparticles as the reactor separated by an ultrathin two-dimensional transition-metal dichalcogenide XS 2 shell (∼2.6 nm). Due to efficient charge transfer across the XS 2 shell as well as energy transfer via coupling of the Au antenna and Au reactor, the photocatalytic activity has been largely enhanced: Au/ReS 2 /Au exhibits a 3.59-fold enhancement, whereas Au/MoS 2 /Au exhibits a 2.66-fold enhancement as compared to that of the sum of the three individual components. The different enhancement in the Au/ReS 2 /Au and Au/MoS 2 /Au antenna-reactor hybrid is related to the competition and cooperation of charge and energy transfer. These results indicate the great potential of the Au/XS 2 /Au antenna-reactor hybrid for the development of highly efficient plasmonic photocatalysts.

  4. Auxílio-reclusão: o instituto mal(maudito das políticas sociais com as políticas penais

    Directory of Open Access Journals (Sweden)

    Luiz Antônio Bogo Chies

    2015-12-01

    Full Text Available Resumo Tendo por eixo o instituto previdenciário auxílio-reclusão - pago aos dependentes do segurado de baixa renda preso - e a análise das representações sociais construídas a partir dessa prática, a pesquisa enfrenta uma dimensão da complexa interface entre a questão social e as políticas penais. A investigação utilizou como campo empírico o ambiente virtual, coletando dados através das mensagens postadas em blogs ou similares. Como referenciais teóricos privilegiou as perspectivas contemporâneas da sociologia do castigo e da economia política da punição, contemplando aspectos instrumentais e simbólicos das interseções em estudo. Seus resultados constatam a peculiar repulsa social no entorno do auxílio-reclusão, o que favorece apropriações no campo jurídico e político que, emolduradas por tecnicismos e populismos punitivos, ampliam a vulnerabilidade das conquistas sociais.

  5. Radiation Safety Awareness among Radiation Workers and ...

    African Journals Online (AJOL)

    Background: All x-ray utilization in human medicine leads to exposure of the patient and personnel to radiation. Although the quantity is low in diagnostic examinations, special attention should be given to this fact in order to minimize unnecessary exposure for both groups. Exposure to ionizing radiation cannot be avoided ...

  6. [Some properties of a mutant of Streptomyces globisporus 1912 supersensitive to ultraviolet radiation].

    Science.gov (United States)

    Lavrinchuk, V Ia; Matseliukh, B P; Tymchyk, O V

    2004-01-01

    A well-sporulating mutant Spo 1 has been isolated after the action of defective phage from the zone of total lysis of Streptomyces globisporus 1912. It has been shown, that mutant Spo 1 is supersensitive to the action of ultraviolet radiation and has the increased sensitivity to the action of methyl-methane-sulfonate, has mutation in the cluster of genes of synthesis of landomycin E and is not sensitive to the action of nitrous acid and hydrogen peroxide. Spo 1 also has a high level of UV-mutability. After the action of UV on spores 4620 colonies were analysed and 17 auxotrophic mutants (0.36%) were selected. Four auxotrophs restored their ability to produce landomycin E and a partial block of synthesis of the antibiotic was observed in six auxotrophs. Seven of white (lnd E) auxotrophs were analysed with the help of a system "secretor-conventer" and it has been shown that two mutants do not synthesize daidzeine flavonoide and have genotype lnd E dai aux uvs, five of them were capable to synthesize this flavonoide and have genotype lnd dai(+) aux uvs. Initial species of S. globisporus 1912 has increased sensitivity to lethal action of UV. It is supposed that mutant Spo 1 bears two uvs-mutations.

  7. Radiation protection standards

    International Nuclear Information System (INIS)

    Koelzer, W.

    1980-01-01

    The present paper deals with: Objectives and basic concepts of radiation protection, basic radiobiological considerations, the ICRP system of dose limitation and with operational radiation protection (limits, reference levels, occupational exposure). (RW)

  8. Environmental Radiation Data

    Data.gov (United States)

    U.S. Environmental Protection Agency — Environmental Radiation Data (ERD) is an electronic and print journal compiled and distributed quarterly by the Office of Radiation and Indoor Air's National Air and...

  9. Radiation and the public

    International Nuclear Information System (INIS)

    Dunster, H.J.

    1976-01-01

    The biological effects of ionizing radiation are summarized. The principles and practice of radiation protection, as applied to human populations, are described with reference to the ICRP recommendations for 'justification, optimization and dose limits'. (U.K.)

  10. Prostate radiation - discharge

    Science.gov (United States)

    ... every 3 to 6 months to check the success of the radiation treatment. Alternative Names Radiation - pelvis - ... ADAM Health Solutions. About MedlinePlus Site Map FAQs Customer Support Get email updates Subscribe to RSS Follow ...

  11. Radiation effects in space

    International Nuclear Information System (INIS)

    Fry, R.J.M.

    1986-01-01

    The paper discusses the radiation environment in space that astronauts are likely to be exposed to. Emphasis is on proton and HZE particle effects. Recommendations for radiation protection guidelines are presented

  12. Pregnancy and Radiation Exposure

    Science.gov (United States)

    ... pregnant women. Ionizing radiation is the kind of electromagnetic radiation produced by x-ray machines, radioactive isotopes (radionuclides), ... and conceive is quite low. Studies of the atomic bomb survivors indicate even in the high-exposure ...

  13. Working with radiation

    International Nuclear Information System (INIS)

    1984-01-01

    This simple booklet is written primarily to supply information about radiation, its potential dangers and radiation protection, to those working for, or considering taking up employment with, British Nuclear Fuels plc. (U.K.)

  14. Radiation camera exposure control

    International Nuclear Information System (INIS)

    Martone, R.J.; Yarsawich, M.; Wolczek, W.

    1976-01-01

    A system and method for governing the exposure of an image generated by a radiation camera to an image sensing camera is disclosed. The exposure is terminated in response to the accumulation of a predetermined quantity of radiation, defining a radiation density, occurring in a predetermined area. An index is produced which represents the value of that quantity of radiation whose accumulation causes the exposure termination. The value of the predetermined radiation quantity represented by the index is sensed so that the radiation camera image intensity can be calibrated to compensate for changes in exposure amounts due to desired variations in radiation density of the exposure, to maintain the detectability of the image by the image sensing camera notwithstanding such variations. Provision is also made for calibrating the image intensity in accordance with the sensitivity of the image sensing camera, and for locating the index for maintaining its detectability and causing the proper centering of the radiation camera image

  15. Radiation and Pregnancy

    Science.gov (United States)

    ... Global Map Premature Birth Report Cards Careers Archives Pregnancy Before or between pregnancies Nutrition, weight & fitness Prenatal ... Is it safe? > Radiation and pregnancy Radiation and pregnancy E-mail to a friend Please fill in ...

  16. Ionizing radiation in environment

    International Nuclear Information System (INIS)

    Jandl, J.; Petr, I.

    1988-01-01

    The basic terms are explained such as the atom, radioactivity, nuclear reaction, interaction of ionizing radiation with matter, etc. The basic dosimetric variables and units and properties of radionuclides and ionizing radiation are given. Natural and artificial sources of ionizing radiation are discussed with regard to the environment and the propagation and migration of radionuclides is described in the environment to man. The impact is explained of ionizing radiation on the cell and the somatic and genetic effects of radiation on man are outlined. Attention is devoted to protection against ionizing radiation and to radiation limits, also to the detection, dosimetry and monitoring of ionizing radiation in the environment. (M.D.). 92 figs., 40 tabs. 74 refs

  17. Radiation education in school

    International Nuclear Information System (INIS)

    Shishido, Teruko; Higashijima, Emiko; Hisajima, Michihiro

    2005-01-01

    Part of goals of general education of physics is to provide students for basic knowledge on radiation. This includes understanding of both its risks and benefits. Students should know how to protect and defence from radiation but they should not overwhelm the risk of radiation. Sometimes, students think that atomic power is so terrible and frightening that they keep away from use of atomic power. Basic knowledge about risks of radiation will reduce the excessive reaction or anxiety coming from radiation. It also makes people understand other possible risks and benefits of radiation accompanied by modern scientific technologies such as nuclear technologies. We believe that the radiation education is an essential requisite for the peaceful usage of nuclear energy and radiation technology for the future. (author)

  18. Radiation protection standards

    International Nuclear Information System (INIS)

    Fitch, J.

    1983-11-01

    Topics covered include biological radiation effects, radiation protection principles, recommendations of the ICRP and the National Health and Medical Research Council, and dose limits for individuals, particularly the limit applied to the inhalation of radon daughters

  19. Hendee's radiation therapy physics

    CERN Document Server

    Pawlicki, Todd; Starkschall, George

    2016-01-01

    The publication of this fourth edition, more than ten years on from the publication of Radiation Therapy Physics third edition, provides a comprehensive and valuable update to the educational offerings in this field. Led by a new team of highly esteemed authors, building on Dr Hendee’s tradition, Hendee’s Radiation Therapy Physics offers a succinctly written, fully modernised update. Radiation physics has undergone many changes in the past ten years: intensity-modulated radiation therapy (IMRT) has become a routine method of radiation treatment delivery, digital imaging has replaced film-screen imaging for localization and verification, image-guided radiation therapy (IGRT) is frequently used, in many centers proton therapy has become a viable mode of radiation therapy, new approaches have been introduced to radiation therapy quality assurance and safety that focus more on process analysis rather than specific performance testing, and the explosion in patient-and machine-related data has necessitated an ...

  20. Ionizing radiation and neoplasia

    International Nuclear Information System (INIS)

    Fajardo, L.F.

    1986-01-01

    Among the well accepted causes of neoplasia, ionizing radiation is quite prominent. Its oncogenic role was suspected by a few pioneers in the field of radiation biology, and some evidence for its oncogenicity has been available for almost 80 years. Since then unquestionable and abundant proof, statistical and experimental, has linked radiation with multiple tumors in mammals. Other forms of radiation (e.g., ultraviolet) are also causally related to neoplasia. This review, however, refers only to the tumors associated with ionizing radiation, either electromagnetic (i.e., gamma and x-rays) or particulate (alpha particles, neutrons, etc.). The field of radiation oncogenesis can be compared to a sea of hypotheses, with a few solid islands of facts. This paper considers the facts (specific radiation-induced neoplasms, risk data, etc.) and then considers some of the hypotheses (possible mechanisms of radiation oncogenesis)