Richard Nelson Bell - Iris Sloman Wedding Day Photo, 1939

A black and white photograph taken in 1939 on the occasion of the marriage of Richard Nelson Bell to Iris Sloman. Pictured in the photograph, from left to right, are: Bert Sloman; Richard Nelson Bell; Iris Sloman Bell; and Helen Beatty Sloman. This photograph was in the possession of Rick Bell, the son of Richard Nelson and Iris Bell. The Bell - Sloman family descends from former Black slaves from the United States.Bert Sloman (Albert Edward Sloman) passed away in 1986 at Kitchener-Waterloo, Ontario. His wife Vera Matilda Sloman passed away January 4, 2011 at Cambridge Memorial Hospital. They had a son, Ron Sloman.

Vera Sloman, Richard Bell, Iris Sloman Bell and Bert Sloman [n.d.]

This black and white family photo is undated yet believed to be in 1939 on the wedding day of Richard and Iris Bell. Pictured in this photo are, from right, Vera, Richard Bell, Iris Sloman Bell, and Bert Sloman. This photo was in the possession of Rick Bell, of St. Catharines, son of Richard and Iris. The Bell - Sloman families have descendants who are former African American slaves.Bert Sloman (Albert Edward Sloman) passed away in 1986 at Kitchener - Waterloo, Ontario. His wife, Vera Matilda Sloman, passed away January 4, 2011 at Cambridge Memorial Hospital. They had a son, Ron Sloman.

Slide - Celebrity Ice Wine Event

A slide from the Inniskillin Celebrity Ice Wine event featuring: Michael Burgess, Ron Barbaro; Jonathan Welsh.

Characterizing Dynamic Optimization Benchmarks for the Comparison of Multi-Modal Tracking Algorithms

Population-based metaheuristics, such as particle swarm optimization (PSO), have been employed to solve many real-world optimization problems. Although it is of- ten sufficient to find a single solution to these problems, there does exist those cases where identifying multiple, diverse solutions can be beneficial or even required. Some of these problems are further complicated by a change in their objective function over time. This type of optimization is referred to as dynamic, multi-modal optimization. Algorithms which exploit multiple optima in a search space are identified as niching algorithms. Although numerous dynamic, niching algorithms have been developed, their performance is often measured solely on their ability to find a single, global optimum. Furthermore, the comparisons often use synthetic benchmarks whose landscape characteristics are generally limited and unknown. This thesis provides a landscape analysis of the dynamic benchmark functions commonly developed for multi-modal optimization. The benchmark analysis results reveal that the mechanisms responsible for dynamism in the current dynamic bench- marks do not significantly affect landscape features, thus suggesting a lack of representation for problems whose landscape features vary over time. This analysis is used in a comparison of current niching algorithms to identify the effects that specific landscape features have on niching performance. Two performance metrics are proposed to measure both the scalability and accuracy of the niching algorithms. The algorithm comparison results demonstrate the algorithms best suited for a variety of dynamic environments. This comparison also examines each of the algorithms in terms of their niching behaviours and analyzing the range and trade-off between scalability and accuracy when tuning the algorithms respective parameters. These results contribute to the understanding of current niching techniques as well as the problem features that ultimately dictate their success.

Les effets d’un traitement au corticostérone sur la transmission dopaminergique mésocorticale du rat en période de stress

L’axe hypothalamo-hypophyso-surrénalien joue un rôle essentiel dans l’adaptation et la réponse au stress. Toutefois, l’hyperactivation de cet axe ou des niveaux chroniquement élevés de glucocorticoïdes (GC) entraînent des conséquences pathologiques. Le système dopaminergique mésocortical, qui se projette dans le cortex préfrontal médian (CPFm), joue un rôle adaptatif en protégeant contre le stress. Jusqu’à présent, les interactions fonctionnelles entre les GC (ex : corticostérone) et le système dopaminergique mésocortical ne sont pas élucidées. Dans ce mémoire, nous avons évalué les effets des GC sur les fonctions dopaminergiques préfrontales en élevant chroniquement, à l’aide de minipompes osmotiques, les niveaux de corticostérone aux concentrations physiologiques maximales (1 mg/kg/h pendant 7 jours). Ce traitement n’a pas modifié significativement, chez les rats stressés ou non, les niveaux post mortem de dopamine et de son métabolite dans le tissu du CPFm. Toutefois, l’évaluation par voltamétrie in vivo des changements de dopamine extracellulaire dans le CPFmv a permis d’observer que la corticostérone augmente significativement la libération de dopamine en réponse à l’exposition à l’odeur de renard et au pincement de la queue. Nos études nous permettent de conclure que la corticostérone potentialise la fonction dopaminergique mésocorticale qui, à son tour, facilite la régulation négative en période de stress.

Censure.cn : Google s’attaque au marché chinois

Étude de cas

La moralité implicite du marché

Dans cet article, je mets en avant une approche de l’éthique du commerce centrée sur la notion de « moralité implicite du marché ». J’essaie d’identifier les grands traits de cette moralité implicite du marché en plus d’exposer les avantages d’adopter une telle approche pour penser les obligations des firmes. Pour ce faire, je tente, en m’inspirant de travaux récents de Joseph Heath, de mettre en lumière le rôle proprement normatif que peut jouer le concept de défaillances des marchés tel que développé dans la théorie économique. Je termine en examinant trois problèmes auxquels fait face l’approche proposée ici. In this article, I put forward an approach to business ethics that focuses on the notion of “implicit morality of the market”. I therefore try to identify the main components of this implicit morality of the market and expose the advantages of taking such a stance to think about the obligations of firms. In order to do so, I try to shed some light, drawing on recent works by Joseph Heath, on the potential normative role of the concept of market failures as articulated in economic theory. I finish by examining three problems that this approach is facing.

La pratique participative en santé publique : l'émergence d'un paradigme

Thèse diffusée initialement dans le cadre d'un projet pilote des Presses de l'Université de Montréal/Centre d'édition numérique UdeM (1997-2008) avec l'autorisation de l'auteur.

Rendre des comptes : comment situer l’entreprise dans le discours démocratique?

Dans  cet article, l'auteur s'inspirant des débats récents soulevés par les poursuites stratégiques contre la mobilisation publique ou encore poursuites-bâillons, propose certaines pistes de réflexion sur la façon dont les entreprises s'insèrent dans le débat public et démocratique. Il tente tout d'abord de présenter les configurations du « processus de reddition de comptes » de plus en plus complexe dans lequel sont impliquées les entreprises. Ensuite, il tente d'identifier certains modes de participation au débat public en se penchant notamment sur la distinction entre discours commercial et discours politique. Enfin, il termine en proposant quelques réflexions sur les leçons qu'il semble possible de tirer de ces débats sur nos façons de penser l'idée de « responsabilité sociale des entreprises ».

Le sens du goût chez l'aveugle congénital

Thèse réalisée en collaboration avec le Département de neurosciences et pharmacologie de l'Université de Copenhague, Danemark.

Surface Reflectance Recognition and Real-World Illumination Statistics

Humans distinguish materials such as metal, plastic, and paper effortlessly at a glance. Traditional computer vision systems cannot solve this problem at all. Recognizing surface reflectance properties from a single photograph is difficult because the observed image depends heavily on the amount of light incident from every direction. A mirrored sphere, for example, produces a different image in every environment. To make matters worse, two surfaces with different reflectance properties could produce identical images. The mirrored sphere simply reflects its surroundings, so in the right artificial setting, it could mimic the appearance of a matte ping-pong ball. Yet, humans possess an intuitive sense of what materials typically "look like" in the real world. This thesis develops computational algorithms with a similar ability to recognize reflectance properties from photographs under unknown, real-world illumination conditions. Real-world illumination is complex, with light typically incident on a surface from every direction. We find, however, that real-world illumination patterns are not arbitrary. They exhibit highly predictable spatial structure, which we describe largely in the wavelet domain. Although they differ in several respects from the typical photographs, illumination patterns share much of the regularity described in the natural image statistics literature. These properties of real-world illumination lead to predictable image statistics for a surface with given reflectance properties. We construct a system that classifies a surface according to its reflectance from a single photograph under unknown illuminination. Our algorithm learns relationships between surface reflectance and certain statistics computed from the observed image. Like the human visual system, we solve the otherwise underconstrained inverse problem of reflectance estimation by taking advantage of the statistical regularity of illumination. For surfaces with homogeneous reflectance properties and known geometry, our system rivals human performance.