Robert A. Stebbins, Department of Sociology, The University of Calgary, is a leading international figure in research on leisure. The concept of "serious leisure", which he has elaborated theoretically and tested empirically in numerous books and articles, has had an enormous impact on research on leisure, work, and social cohesion. He has produced major studies on the links between amateurs and professionals in a variety of fields, as well as the role of leisure in maintaining Francophone communities outside Quebec. His "serious leisure" perspective has been adopted as a theoretical foundation by the Leisure Education Commission of the World Leisure and Recreation Association.

STEELE' Alan G. - Measurement Science and Standards, National Research Council of Canada Alan G. Steele has positioned Canada as a world leader in measurement science and metrology. As Canada’s Chief Metrologist, he has used diplomacy supported by the scientific achievements of his national metrology institute to guide international decisions. He trained and directed measurement scientists for high achievement with Canada’s measurement standards leading the world on linking the Planck constant to the mass of the International Prototype of the kilogram.

STEELE, Alan G. - Science des mesures et étalons, Conseil national de recherches Canada Alan G. Steele a permis au Canada de se placer comme chef de file mondial dans le domaine de la science des mesures et de la métrologie. En tant que métrologiste en chef du Canada, il a fait preuve de diplomatie et s'est appuyé sur les réalisations scientifiques de son institut de métrologie national pour orienter des décisions internationales. Il a formé et dirigé des scientifiques talentueux spécialisés dans les mesures. Les normes de mesures du Canada dominent d'ailleurs le monde en ce qui concerne le lien entre la Constante de Planck réduite et la masse du prototype international du kilogramme.

Nico Stehr is one of Canada's principal social theorists who has gained international recognition for his work in the philosophy and the sociology of science as well as for his writings concerned with the social basis of ideas. He is a key member of a group of scholars who have contributed considerably to the revival of the sociology of knowledge and social epistemology. He is in addition one of the founding editors of the very successful "Canadian Journal of Sociology" which is about to enter its tenth year of publication. He continues to be associated with the "Journal" as one of its editors.

Strategic Studies tends to be preoccupied with power and the containment of aggression by convincing counter-threats. In contrast, Janice Stein is a leading member of a new international group of scholars that has broken with the dominant behavioral and realist traditions of International Relations as a discipline to develop an approach to decision making on security issues which instead gives emphasis to nonrational factors, to historical, cultural religious and socio-economic determinants and which seeks to promote peace through conciliation, through the reassurance of adversaries, and through compromise.

STEINBERG, Aephraim – Department of Physics, University of Toronto Aephraim Steinberg is a professor of Physics at the University of Toronto. Using ultracold atoms and entangled photons, he studies the foundations of quantum mechanics and quantum measurement, as well as applications to quantum information. He is known for his theoretical and experimental work on “weak measurement,” which he has used for instance to track photon “trajectories” and to demonstrate a violation of the common interpretation of Heisenberg’s Uncertainty Principle.

Aephraim Steinberg est professeur de physique à la University of Toronto. À l’aide d’atomes ultrafroids et de photons entremêlés, il étude les fondations de la mécanique quantique et de la mesure quantique, ainsi que les applications à l’information quantique. Il est reconnu pour ses travaux théoriques et expérimentaux sur la « mesure faible », qu’il a utilisée par exemple pour suivre les « trajectoires » de photon et démontrer une violation de l’interprétation commune du principe d’incertitude de Heisenberg.

Nils Chr. Stenseth pioneered the integration of climatic drivers with population ecology to understand dynamical, evolutionary change in terrestrial and marine animal systems. His research breadth extends from organismal genomics and the evolutionary ecology of Canadian mammals and fishes to disease systems for plague, including COVID-19. Stenseth's intellectual versatility enabled him to break long-standing barriers and to contribute profoundly to inter-disciplinary thinking within the fields of ecology and evolutionary biology.

Nils Chr. Stenseth a été le premier à intégrer les facteurs climatiques à l'écologie des populations pour comprendre les changements dynamiques et évolutifs se produisant au sein des écosystèmes animaux terrestres et marins. Ses recherches s'étendent de la génomique des organismes et de l'écologie évolutive des mammifères et des poissons canadiens aux systèmes pathologiques des fléaux naturels, dont la COVID-19. La polyvalence intellectuelle du Prof. Stenseth lui a permis de casser les codes et de contribuer profondément à la réflexion interdisciplinaire dans les domaines de l'écologie et de la biologie évolutive.

David Stephens is a world leader in Bayesian statistics and causal inference. In addition to designing efficient computational techniques and sophisticated analytical tools for static and dynamic data, he brought crucial statistical expertise to the resolution of major issues in biostatistical and health research. His work on causal inference has also led to insights in causal mechanisms of complex diseases and better treatment protocols.

David Stephens est un spécialiste mondialement reconnu en statistique bayésienne et en inférence causale. En plus d’avoir conçu des techniques de calcul efficaces et des outils sophistiqués pour l’analyse de données statiques et dynamiques, il a fourni une expertise statistique cruciale à la résolution de problèmes majeurs en biostatistique et en santé. Ses travaux sur l’inférence causale ont aussi permis de mieux comprendre les mécanismes causaux de maladies complexes et d’améliorer les protocoles de soins.

Long Citation Peter Stetson has developed computer software to facilitate the measurement of the brightness and colours of individual stars in stellar clusters and other areas of the sky in which the recorded images of the stars are crowded together, or overlapping. His software is much in demand and is used by astronomers all over the world. Stetson himself has applied it to the study of the ages of stars in our own Galaxy and in other galaxies and to the determination of the age of the universe from its expansion rate. On all these topics he is considered a leading authority. Short Citation Peter Stetson has developed computer software to facilitate the measurement of brightness and colours of individual stars in stellar clusters and other areas of the sky in which the recorded images of the stars are crowded together, or overlapping. The software is in high demand and is used by astronomers world-wide. Stetson himself has applied it to the study of the ages of stars and to the determination of the age of the universe from its expansion rate. On all these topics he is considered a leading authority.

Cameron Stewart's imaginative work in analytic number theory has produced many original and striking results. His early work on applications of transcendence theory to divisors of arithmetical sequences initiated a new field of study. His results in that area have never been surpassed. His introduction of transcendence theory into the study of heights of algebraic numbers led to the subsequent important generalization of these results to elliptic curves and abelian varieties. His recent work has combined methods from analytic and combinatorial number theory to solve a number of well known difficult problems.

Pamela STEWART, Professor of Italian and Chairman of the Department at McGill University, has gained international recognition through her numerous studies of Italian literature in the Middle Ages and the Renaissance. Her wide-ranging work on Boccaccio, her penetrating essays on the development of the novel and of other forms of art, in particular of the theatre, as well as her reflections on aesthetics and on the relation between painting and poetry, have won the praise of literary critics in Europe and America. Her book on Gentillet, remarkable for the originality of its scholarship and the definitive character of its conclusions, has been hailed as a major contribution to the study of the reception of, and polemic against, Machiavelli, and noted for the light it sheds on cultural relations between Italy and France.

Professor Stewart is a global leading expert on precipitation processes within winter storms. He plays leading roles internationally, including the Global Energy and Water Cycle Experiment and now its new initiative on climate extremes. ------------------ STEWART, Ronald E. –Department of Environment and Geography, University of Manitoba Professor Stewart is a global leading expert on precipitation processes within winter storms. As the scientific leader for the Canadian Atlantic Storms Program, the Beaufort and Arctic Storms Experiment and the Mackenzie GEWEX Study and now co-lead for the Storm Studies in the Arctic experiment and the Drought Research Initiative, he has led the way in Canadian research with extensive publications, special issues of journals and books, and supervision of graduate students. He has been President of the Canadian Meteorological and Oceanographic Society. He plays leading roles internationally, including the Global Energy and Water Cycle Experiment and now its new initiative on climate extremes.