Le Travail Humain 2004/4 Vol. 67, 2004/4 - pagesPages 305 to 332Evolution of the Regulations on Critical Situations among WorkersBy Sandrine Caroly, Annie Weill-FassinaPages 333 to 357Professional Identity at Risk: Case of Machine Operators in a Context of Technological and Work TransformationsBy Pierre-Yves Therriault, Jacques Rhéaume, U. StreitPages 359 to 376Sleep-Wake Cycle, General Movements and Eating Habits in Obese Shift Workers: A Case Study of NursesBy Odile Rohmer, Anne Bonnefond, A. Muzet, P. TassiPages 377 to 395Finding Relevant Information in Web Menus: Relationship between Tasks, Menu Types, and Individual FactorsBy Jean-François Rouet, C. Ros, G. Jégou, S. Metta