Linear and nonlinear terrain deformation maps from a reduced set of interferometric SAR images

In this paper, an advanced technique for the generation of deformation maps using synthetic aperture radar (SAR) data is presented. The algorithm estimates the linear and nonlinear components of the displacement, the error of the digital elevation model (DEM) used to cancel the topographic terms, and the atmospheric artifacts from a reduced set of low spatial resolution interferograms. The pixel candidates are selected from those presenting a good coherence level in the whole set of interferograms and the resulting nonuniform mesh tessellated with the Delauney triangulation to establish connections among them. The linear component of movement and DEM error are estimated adjusting a linear model to the data only on the connections. Later on, this information, once unwrapped to retrieve the absolute values, is used to calculate the nonlinear component of movement and atmospheric artifacts with alternate filtering techniques in both the temporal and spatial domains. The method presents high flexibility with respect to the required number of images and the baselines length. However, better results are obtained with large datasets of short baseline interferograms. The technique has been tested with European Remote Sensing SAR data from an area of Catalonia (Spain) and validated with on-field precise leveling measurements.

Les aspects sanitaires du travail de la police auprès des consommateurs de drogues

Voir aussi version en allemand: Gesundheitliche Aspekte der Polizeiarbeit im Drogenbereich.

Annual Review of the European Football Players' Labour Market / Etude annuelle du marché du travail européen des footballeurs

The key reference on the labour market and the logics of squad formation in the five main European leagues. One hundred richly coloured pages, illustrated by graphics, maps, rankings, statistical models and analysis in French and English which... - inform managers about potential strategies to put their clubs on the road to success - help managers of federations and players' unions to understand current trends and to take decisions - suggest to journalists new lines of investigation likely to interest the general public - allow researchers and students to benefit from reliable and comparable sources, developed with the greatest possible rigour - give fans the possibility to understand in detail the dynamics at work in their favourite sport and club Demographic Study of Footballers in Europe The Demographic Study of European Footballers is an annual publication destined for anyone who wishes to acquire a scientific understanding of the European football players' labour market. It presents the dynamics at work in 36 first division leagues in UEFA member countries. This edition covers our biggest ever survey comprising more than 520 clubs and 13,000 footballers. Statistical indicators relative to nine thematics (morphology, age, experience training, origin, etc.) allow the comparison of player profiles and squad compositions at league and club level. Through easily-understable regression analyses, the Study brings to light the principle differences between clubs and leagues according to economic and sporting level of championships. The final part presents the list of the most promising players under 23 years of age by league and position

Helicopter rescue involving the winching of a physician

1855 missions de secours héliportés impliquant le treuillage d'un médecin ont été répertoriées. L'étude de la gravité des blessures ainsi que les difficultés pour accéder au patient ont permis de répondre à la question de la pertinence de ces procédures. Enjeu L'utilisation d'hélicoptères dans un système extra-hospitalier ainsi que la médicalisation de ces derniers est controversée. Des problèmes liés au coût, à la sécurité ainsi qu'à l'efficacité ont été évoqués. Les critères d'engagement sont également régulièrement remis en cause. Aucune étude récente ne s'est intéressée à la pertinence du système suisse et c'était un des objectifs de ce travail. Contexte L'étude s'est intéressée à tous les patients pris en charge par les médecins de la base Rega de Lausanne pendant une durée de 4 ans Conclusions Le treuillage héliporté est nécessaire pour un nombre significatif de patients. La gravité des diagnostics et le nombre de procédures médicales avancées justifient la médicalisation ainsi que le treuillage en raison des difficultés d'accès et d'évacuation. Perspectives Cette étude permet de répondre à l'utilité de la médicalisation en terrain difficile pour la région étudiée. Toutefois ces résultats ne devraient pas être extrapolés à d'autres régions ni à d'autres pays. Des études similaires sont nécessaires afin de permettre une comparaison internationale des différents services de secours héliportés

La flexibilité du temps de travail: entre autonomie et contraintes. Une étude de cas en Suisse.

Flexitime : between autonomy and constraints. A case study in SwitzerlandBy looking at how a new regulation is translated into everyday practices, this dissertation explores through a specific case study the degree of autonomy gained by wage-earners with the introduction of flexible working schedules. The guiding hypothesis is that by introducing procedural rules, flexitime opens the space for more daily negotiations, therefore reinforcing the effects of power relations inherent to employment relationships. The goal is to understand, through a sociological approach, how employees experience a form of working time that transfers responsibility for time management to them, and howthey integrate work-related constraints with their life outside the workplace. The first part of the dissertation sets up the context of the case study. It offers a definition of flexibility by situating it in the broader history of work time, as well as in relation to various organizational forms and cultural transformations. An international literature review and a focus on the Swiss case are offered. In the second part, the focus is narrowed to a specificSwiss firm specialized in mail-order, where a system of individualized management of annual work time has been introduced. By combining a quantitative and qualitative approach, it is possible to analyze determinants of the practices internal to the firm anddeterminants related to employees themselves, as well as the way in which employees articulate these two orders of constraints. The results show that the implementation of flexible working time is not affecting daily negotiation practices so much as it is creating a set of informal rules. The autonomy ofwage-earners is expressed first and foremost through their capacity to produce, negotiate, and legitimate these rules. The intraindividual level has proven to be central for the social regulation of flexible working time. It is not so much a question of legitimation, but rather the process of institutionalization nurtured by the energy invested by wage-earners in their personal quest for a compromise between their various roles, identities, and aspirations. It is this individualized regulation that is ensuring the success of the system under study.

Stress et satisfaction au travail des cadres intermédiaires dans les hôpitaux de Suisse romande dans un contexte de réformes

L'article vise à identifier les déterminants du stress et de la satisfaction au travail parmi une population de cadres intermédiaires exerçant dans des établissements hospitaliers de Suisse romande. Il vise également à combler un vide dans les études sur les administrations publiques suisses: mieux saisir, au moyen d'une enquête par questionnaires, quels sont les principales variables qui se trouvent à l'origine de la satisfaction au travail et qui peuvent être des ressources pour les acteurs afin de faire face au stress. L'étude confirme des résultats de recherches internationales, montrant que des facteurs relationnels et des caractéristiques du travail sont les principaux déterminants du stress et de la satisfaction. Elle souligne dès lors l'importance d'adopter une lecture « structurelle » et « organisationnelle » du stress et de la satisfaction, soulignant aussi que les caractéristiques individuelles de la population étudiée n'expliquent qu'une très infime variance de ces phénomènes.