Les motivations qui amènent les adultes à revenir à la formation

Québec Université Laval, Bibliothèque 201

Introduction : le sport et l'activité physique, éléments centraux de la vie personnelle, communautaire, sociale et économique - Introduction : sports and physical activity, key elements of personal, community, social and economic life

Introduction du numéro thématique : 'Sport et activité physique : vie personnelle, sociale et économique'

Injuries and risk taking in alpine skiing

The purpose of this study was to investigate the relation between motivation toward alpine skiing, attitude toward risk-taking behavior, risk-taking behavior, and injury incidence. Participants were skiers over eleven years of age. They completed a questionnaire that investigated skill level, sources of motivation toward alpine skiing, attitude toward risktaking behavior, and risk-taking behavior. A MANOVA was performed to compare three groups of skiers: (1) 163 skiers caught on the slope while performing a voluntary thrill-seeking behavior that could directly or indirectly lead to a sequence of events frequently associated to injuries (RISK TAKING); (2) 190 injured skiers (INJURED); and (3) 219 randomly selected skiers (UNINJURED). Significant differences were found between the three groups on age and skill level (p < 0.001). Skiers from the RISK TAKING group were younger (19.9 years old) than those from the INJURED group (24.7 years old) who were in turn younger than the UNINJURED group (30.7 years old). Skiers from the INJURED group were the least skilled, while those from the RISK TAKING group were the most skilled (p < 0.001). No differences were found between the INJURED and the UNINJURED groups on their source of motivation for skiing and their attitude toward risk taking. However, skiers from the RISK TAKING group were significantly different than the other two groups on those cognitive variables. They perceived the risky behaviors presented in vignettes as being less dangerous than skiers from the UNINJURED and the INJURED groups. These results suggest that in future prevention programs, the emphasis should be placed on the development of skiing technique among the lowskilled skiers. It also questions the strategy of targeting risk takers in prevention campaigns

Relations entre les valeurs de travail et de loisir d'étudiants de niveaux collégial et universitaire /

Bibliogr.: p. 223-23

A comparative study between human skin substitutes and normal human skin using Raman microspectroscopy

Research in the field of bioengineered skin substitutes is motivated by the need to find new dressings for people affected by skin injuries (burns, diabetic ulcers), and to develop adequate skin models to test new formulations developed in vitro. Thanks to advances in tissue engineering, it is now possible to produce human skin substitutes without any exogenous material, using the self-assembly method developed by the Laboratoire d’Organogénèse Expérimentale. These human skin substitutes consist of a dermis and a stratified epidermis (stratum corneum and living epidermis). Raman microspectroscopy has been used to characterize and compare the molecular organization of skin substitutes with normal human skin. Our results confirm that the stratum corneum is a layer rich in lipids which are well ordered (trans conformers) in both substitutes and normal human skin. The amount of lipids decreases and more gauche conformers appear in the living epidermis in both cases. However, the results also show that there are fewer lipids in the substitutes and that the lipids are more organized in the normal human skin. Concerning the secondary structure of proteins and protein content, the data show that they are similar in the substitutes and in the normal human skin. In fact, the epidermis is rich in α-keratin, whereas the dermis contains mainly type I collagen