7 research outputs found

    Analysis of Preoperative CT Scan Can Help Predict Technical Failure of Endovascular Treatment of TASC C-D Aortoiliac Chronic Total Occlusions

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    International audienceBACKGROUND AND AIMS: To evaluate if features of occlusion analyzable on preoperative computed tomography scan could predict risks of technical failure or iliac rupture of endovascular treatment of TransAtlantic InterSociety Consensus C-D aortoiliac chronic total occlusion. METHODS AND RESULTS: All patients treated by endovascular techniques for a TransAtlantic InterSociety Consensus C-D aortoiliac chronic total occlusion between 2009 and 2016 were included (107 patients, 148 iliac arteries). We evaluated the location of the occlusion and the importance of the arterial calcifications. For this factor, patients were divided into 3 groups: the Black occlusion group with mild or no calcifications, the white occlusion group with moderate no protrusive calcifications, and the white protrusive occlusion group with heavy endoluminal calcifications. Technical failure occurred in 11 iliac arteries and peroperative iliac rupture in 6. The location in the external iliac artery is the most significate risk factor of technical failure in univariate (OR = 9.93; P = 0.0012) and multivariate analysis (OR = 15.26; P = 0.0006). The presence of heavy endoluminal calcifications is a further significate risk factor (OR = 13.88; P = 0.0365). Rupture rate was comparable between the 3 groups. CONCLUSIONS: Preoperative computed tomography scan can predict risk of technical failure but not of iliac rupture

    The effects of a strong winter storm on physical and biological variables at a shelf site in the Mediterranean

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    A survey involving both permanent mooring and high frequency sampling was carried in the Bay of Banyuls-sur-Mer during the fall of 1999 to assess the effect of strong and unpredictable meteorological events on the functioning of a coastal Mediterranean ecosystem. A severe winter storm took place on 12 November, which generated waves with a significant height of 7 m and a sea surface rise of about 0.5 m. The near-bottom current speed at 24 m reached 30 cm s(-1). This storm induced a significant increase in total suspended matter through resuspension and then a subsequent increase in gross sedimentation rates. It also resulted in an increase of the proportion of refractory particulate organic matter in the water column. It also tended to increase nutrient availability in the water column through resuspension and desorption processes. The kinetic of this increase differed among nutrients. Bacterial biomass and production were significantly enhanced by the storm. These effects were transitory and probably not due to resuspension alone. The distribution of plant pigments was modified at the immediate vicinity of the water-sediment interface due to differential resuspension and sedimentation but the storm had no effect on integrated phytoplanktonic biomass. Such a lack of response may be linked to low precipitations and/or light limitation. The storm resulted in a transitory increase of the abundance of fine particles at the water-sediment interface. These particles were coated with refractory organic matter. The storm induced a significant decrease of meiofauna abundance. The duration of the relaxation periods varied among parameters. It lasted 2 weeks for total suspended matter, surface sediment granulometry and carbohydrate contents.Une Ă©tude faisant intervenir des mouillages permanents et un Ă©chantillonnage haute frĂ©quence a Ă©tĂ© conduite en baie de Banyuls-sur-Mer pendant l'automne 1999 afin de dĂ©terminer les effets d’évĂ©nements mĂ©tĂ©orologiques forts et imprĂ©visibles sur le fonctionnement d’un Ă©cosystĂšme cĂŽtier mĂ©diterranĂ©en. Une forte tempĂȘte hivernale a eu lieu le 12 novembre 1999. Cette tempĂȘte a engendrĂ© des vagues dont la hauteur Ă©tait proche de 7 mĂštres ainsi qu’une Ă©lĂ©vation du niveau de la mer voisine d’un demi-mĂštre. La vitesse du courant Ă  24 mĂštres de profondeur a alors atteint 30 cm s–1. Cette tempĂȘte a induit une augmentation significative de la concentration de matiĂšres en suspension dans l’eau puis une augmentation des taux de sĂ©dimentation brute. Elle a Ă©galement rĂ©sultĂ© en une augmentation de la proportion de matiĂšre organique particulaire rĂ©fractaire dans la colonne d’eau. La tempĂȘte a Ă©galement contribuĂ© Ă  augmenter la disponibilitĂ© des sels nutritifs dans la colonne d’eau. La cinĂ©tique de cette augmentation a cependant diffĂ©rĂ© d’un sel Ă  l’autre. La biomasse et la production bactĂ©rienne ont toutes deux Ă©tĂ© positivement affectĂ©es par la tempĂȘte. Ces augmentations ont Ă©tĂ© transitoires et n’étaient probablement pas liĂ©es au seul processus de resuspension. La composition pigmentaire du phytoplancton a Ă©tĂ© modifiĂ©e Ă  proximitĂ© immĂ©diate de l’interface eau-sĂ©diment mais la tempĂȘte n’a pas eu d’effet significatif sur la biomasse phytoplanctonique intĂ©grĂ©e. Une telle absence de rĂ©ponse pourrait ĂȘtre liĂ©e Ă  la faiblesse des prĂ©cipitations et/ou Ă  une limitation par la lumiĂšre. La tempĂȘte a induit une augmentation transitoire de la proportion de particules fines Ă  la surface du sĂ©diment. Ces particules Ă©taient associĂ©es Ă  de la matiĂšre organique rĂ©fractaire. La tempĂȘte a Ă©galement engendrĂ© une diminution significative de l’abondance de la meiofaune. La durĂ©e de la pĂ©riode de relaxation a variĂ© d’un paramĂštre Ă  l’autre. Elle a durĂ© deux semaines pour les matiĂšres en suspension ainsi que pour la granulomĂ©trie et le contenu en carbohydrates des sĂ©diments de surface

    The effects of a strong winter storm on physical and biological variables at a shelf site in the Mediterranean

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    13 pages, 8 figures[EN] A survey involving both permanent mooring and high frequency sampling was carried in the Bay of Banyuls-sur-Mer during the fall of 1999 to assess the effect of strong and unpredictable meteorological events on the functioning of a coastal Mediterranean ecosystem. A severe winter storm took place on 12 November, which generated waves with a significant height of 7 m and a sea surface rise of about 0.5 m. The near-bottom current speed at 24 m reached 30 cm s-1. This storm induced a significant increase in total suspended matter through resuspension and then a subsequent increase in gross sedimentation rates. It also resulted in an increase of the proportion of refractory particulate organic matter in the water column. It also tended to increase nutrient availability in the water column through resuspension and desorption processes. The kinetic of this increase differed among nutrients. Bacterial biomass and production were significantly enhanced by the storm. These effects were transitory and probably not due to resuspension alone. The distribution of plant pigments was modified at the immediate vicinity of the water-sediment interface due to differential resuspension and sedimentation but the storm had no effect on integrated phytoplanktonic biomass. Such a lack of response may be linked to low precipitations and/or light limitation. The storm resulted in a transitory increase of the abundance of fine particles at the water-sediment interface. These particles were coated with refractory organic matter. The storm induced a significant decrease of meiofauna abundance. The duration of the relaxation periods varied among parameters. It lasted 2 weeks for total suspended matter, surface sediment granulometry and carbohydrate contents. © 2003 Éditions scientifiques et mĂ©dicales Elsevier SAS and Ifremer/CNRS/IRD. All rights reserved[FR] Une Ă©tude faisant intervenir des mouillages permanents et un Ă©chantillonnage haute frĂ©quence a Ă©tĂ© conduite en baie de Banyuls-sur-Mer pendant l'automne 1999 afin de dĂ©terminer les effets d’évĂ©nements mĂ©tĂ©orologiques forts et imprĂ©visibles sur le fonctionnement d’un Ă©cosystĂšme cĂŽtier mĂ©diterranĂ©en. Une forte tempĂȘte hivernale a eu lieu le 12 novembre 1999. Cette tempĂȘte a engendrĂ© des vagues dont la hauteur Ă©tait proche de 7 mĂštres ainsi qu’une Ă©lĂ©vation du niveau de la mer voisine d’un demi-mĂštre. La vitesse du courant Ă  24 mĂštres de profondeur a alors atteint 30 cm s–1. Cette tempĂȘte a induit une augmentation significative de la concentration de matiĂšres en suspension dans l’eau puis une augmentation des taux de sĂ©dimentation brute. Elle a Ă©galement rĂ©sultĂ© en une augmentation de la proportion de matiĂšre organique particulaire rĂ©fractaire dans la colonne d’eau. La tempĂȘte a Ă©galement contribuĂ© Ă  augmenter la disponibilitĂ© des sels nutritifs dans la colonne d’eau. La cinĂ©tique de cette augmentation a cependant diffĂ©rĂ© d’un sel Ă  l’autre. La biomasse et la production bactĂ©rienne ont toutes deux Ă©tĂ© positivement affectĂ©es par la tempĂȘte. Ces augmentations ont Ă©tĂ© transitoires et n’étaient probablement pas liĂ©es au seul processus de resuspension. La composition pigmentaire du phytoplancton a Ă©tĂ© modifiĂ©e Ă  proximitĂ© immĂ©diate de l’interface eau-sĂ©diment mais la tempĂȘte n’a pas eu d’effet significatif sur la biomasse phytoplanctonique intĂ©grĂ©e. Une telle absence de rĂ©ponse pourrait ĂȘtre liĂ©e Ă  la faiblesse des prĂ©cipitations et/ou Ă  une limitation par la lumiĂšre. La tempĂȘte a induit une augmentation transitoire de la proportion de particules fines Ă  la surface du sĂ©diment. Ces particules Ă©taient associĂ©es Ă  de la matiĂšre organique rĂ©fractaire. La tempĂȘte a Ă©galement engendrĂ© une diminution significative de l’abondance de la meiofaune. La durĂ©e de la pĂ©riode de relaxation a variĂ© d’un paramĂštre Ă  l’autre. Elle a durĂ© deux semaines pour les matiĂšres en suspension ainsi que pour la granulomĂ©trie et le contenu en carbohydrates des sĂ©diments de surfaceThis work was funded through the “Action de Recherche ThĂ©matique” no. 1 of the French “Programme National Environnement CĂŽtier

    The Multidimensional Work Motivation Scale: Validation evidence in seven languages and nine countries

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    Self-determination theory proposes a multidimensional conceptualization of motivation comprising autonomous and controlled forms. Whereas autonomous motivation relates positively to individuals’ optimal functioning (e.g., well-being, performance), controlled motivation is less beneficial. To be able to use self-determination theory in the field of organizational behaviour, the Multidimensional Work Motivation Scale was developed and tested using data from 3435 workers in seven languages and nine countries. Factorial analyses indicated that the 19-item scale has the same factor structure across the seven languages. Convergent and discriminant validity tests across the countries also indicate that the psychological needs for autonomy, competence, and relatedness as well as the theoretically derived antecedents to work motivation (e.g., leadership and job design) are predictably related to the different forms of motivation, which in turn are predictably related to important work outcomes (e.g., well-being, commitment, performance, and turnover intentions). Implications for the development of organizational research based on self-determination theory are discussed

    Agroecological transformation for sustainable food systems : Insight on France-CGIAR research

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    This 26th dossier d’Agropolis is devoted to research and partnerships in agroecology. The French Commission for International Agricultural Research (CRAI) and Agropolis International, on behalf of CIRAD, INRAE and IRD and in partnership with CGIAR, has produced this new issue in the ‘Les dossiers d’Agropolis international’ series devoted to agroecology. This publication has been produced within the framework of the Action Plan signed by CGIAR and the French government on February 4th 2021 to strengthen French collaboration with CGIAR, where agroecology is highlighted as one of the three key priorities (alongside climate change, nutrition and food systems)
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