Une analyse des facteurs reliés au sentiment d’insécurité en milieu carcéral

Depuis longtemps, le sentiment d’insécurité suscite l’intérêt des chercheurs en sciences sociales. En milieu carcéral, ce phénomène est encore peu étudié. Les différentes études arrivent à des résultats incohérents par rapport aux facteurs reliés au sentiment d’insécurité des détenus. Les différentes façons de conceptualiser et de mesurer ce phénomène apparaissent souvent comme une des causes de l’incohérence des résultats obtenus. La présente étude a comme objectif général d’approfondir les connaissances sur le sentiment d’insécurité des incarcérés et présente les objectifs spécifiques suivants: (1) dresser un portrait quantitatif du sentiment d'insécurité en tenant compte de ses dimensions affective, cognitive et comportementale; (2) estimer le taux de victimisation dans les pénitenciers canadiens du Québec; (3) analyser les facteurs reliés aux différentes dimensions du sentiment d'insécurité; (4) analyser l’interrelation entre les différentes dimensions du sentiment d’insécurité. Afin d’atteindre ces objectifs, les données recueillies auprès de 293 détenus de dix pénitenciers québécois ont été analysées. Des analyses descriptives ont été utilisées pour documenter le sentiment d’insécurité des détenus en tenant compte de différentes dimensions. Des analyses bi variées et multi variées ont permis d'identifier les facteurs individuels et contextuels en relation significative avec les différentes dimensions du sentiment d’insécurité. Des modèles de régression hiérarchisée ont permis d’analyser l’interrelation entre les différentes dimensions du sentiment d’insécurité, en tenant compte de l’influence de facteurs individuels et contextuels. Les résultats ont révélé un niveau d’insécurité peu élevé et variable parmi la population carcérale et aussi que les différentes dimensions du sentiment d’insécurité étaient affectées par différents facteurs et qu'elles étaient partiellement inter reliées.For a long time, the feeling of safety has been a subject matter of interest to social scientists. Applied in prisons, this phenomenon is not much studied. Different studies have come to inconsistent results with respect to factors related to insecurity. The different ways of conceptualizing and measuring this phenomenon often appear as a cause of the inconsistency of the results. The present study aims to deepen general knowledge about the insecurity sentiment and present the following specific objectives: (1) provide a quantitative picture of the feeling of safety, taking into account its emotional, cognitive and behavioral dimensions; (2) estimate the victimization rate in Canadian penitentiaries in Quebec; (3) analyse the different factors that are related to the different dimensions of feeling of safety; (4) analyse the interrelation between the different dimensions of the feeling of safety. To achieve these objectives, data from 293 inmates held in ten Quebec prisons were analyzed. Descriptive analyses were used to document the insecurity of prisoners taking into account various dimensions. Bivariate and multivariate analyses have permitted to identify the individual and contextual factors that are significantly associated with the different dimensions of insecurity. Hierarchical regression models were used to verify the interrelation between the different dimensions of feeling of safety, taking into account the influence of other factors. The results showed a level of insecurity that is low and variable among the prison population, and also that the different dimensions of insecurity were affected by various factors and were partially interconnected

Brewster effects for deep metallic gratings

Total absorption of light by highly modulated metallic gratings is demonstrated both theoretically and experimentally. This phenomenon occurs when only the zeroth-order propagates and is linked with the excitation of surface plasmons

Theoretical study of the anomalies of coated dielectric gratings

Abstract. The zero-order diffraction efficiency anomalies of a corrugated dielectric waveguide are studied theoretically in detail. A new and surprising phenomenon is observed: the efficiency changes from 0 to 100 per cent in the vicinity of the excitation of guided waves. The fundamental parameters of the system are found in the case where only one order is propagating and some of their properties are shown. The behaviour of the efficiency curves is explained by a phenomenological theory and a comparison with numerical rigorous results is made. Introduction Dielectric coatings are often deposited on the top of metallic gratings in order to protect the metal layer from oxidation and to increase the efficiency, most frequently for aluminium gratings working in the ultraviolet. Sometimes they are used on the top of silver gratings operating in the near infrared region. The presence of a dielectric layer, however, may drastically change the behaviour of the efficiency curves, as it has been pointed out by Palmer [1] for TE polarization and by Cowan and Arakawa [2] for TM polarization. The influence of a thick dielectric layer on the diffraction efficiency of a blazed aluminium grating has been investigated experimentally by Hutley et al. On the other hand, corrugated gratings on the top of dielectric waveguides are widely used in integrated optics as input or output couplers [6], filters, demultiplexers, etc

Resonant Photonic Biosensors with Polarization-Based Multiparametric Discrimination in Each Channel

In this paper, we describe guided-mode resonance biochemical sensor technology. We briefly discuss sensor fabrication and show measured binding dynamics for example biomaterials in use in our laboratories. We then turn our attention to a particularly powerful attribute of this technology not possessed by competing methods. This attribute is the facile generation of multiple resonance peaks at an identical physical location on the sensor surface. These peaks respond uniquely to the biomolecular event, thereby enriching the data set available for event quantification. The peaks result from individual, polarization-dependent resonant leaky modes that are the foundation of this technology. Thus, by modeling the binding event and fitting to a rigorous electromagnetic formalism, we can determine individual attributes of the biolayer and its surroundings and avoid a separate reference site for background monitoring. Examples provide dual-polarization quantification of biotin binding to a silane-coated sensor as well as binding of the cancer biomarker protein calreticulin to its monoclonal IgG capture antibody. Finally, we present dual-polarization resonance response for poly (allylamine hydrochloride) binding to the sensor with corresponding results of backfitting to a simple model; this differentiates the contributions from biolayer adhesion and background changes