Ryerson University

About: Ryerson University is a education organization based out in Toronto, Ontario, Canada. It is known for research contribution in the topics: Computer science & Population. The organization has 7671 authors who have published 20164 publications receiving 394976 citations. The organization is also known as: Ryerson Polytechnical Institute & Ryerson Institute of Technology.

The Immigration Dilemma: The Role of Perceived Group Competition, Ethnic Prejudice, and National Identity

Abstract: In this article, we discuss the role of perceived competition for resources in determining negative attitudes toward immigrants and immigration in North America. We first provide background information on immigration policies and levels of immigration to Canada and the United States. Following an overview of our theoretical perspective, we then describe the research we have conducted in Canada and the United States indicating that perceived zero-sum competition between groups, whether situationally induced or a function of chronic belief in zero-sum relations among groups, is strongly implicated in negative immigration attitudes. In addition, we describe our recent attempts to improve attitudes toward immigrants and immigration through the targeting of zero-sum beliefs and through manipulations of the inclusiveness of national identity.

High-Power Wind Energy Conversion Systems: State-of-the-Art and Emerging Technologies

Abstract: This paper presents a comprehensive study on the state-of-the-art and emerging wind energy technologies from the electrical engineering perspective. In an attempt to decrease cost of energy, increase the wind energy conversion efficiency, reliability, power density, and comply with the stringent grid codes, the electric generators and power electronic converters have emerged in a rigorous manner. From the market based survey, the most successful generator-converter configurations are addressed along with few promising topologies available in the literature. The back-to-back connected converters, passive generator-side converters, converters for multiphase generators, and converters without intermediate dc-link are investigated for high-power wind energy conversion systems (WECS), and presented in low and medium voltage category. The onshore and offshore wind farm configurations are analyzed with respect to the series/parallel connection of wind turbine ac/dc output terminals, and high voltage ac/dc transmission. The fault-ride through compliance methods used in the induction and synchronous generator based WECS are also discussed. The past, present and future trends in megawatt WECS are reviewed in terms of mechanical and electrical technologies, integration to power systems, and control theory. The important survey results, and technical merits and demerits of various WECS electrical systems are summarized by tables. The list of current and future wind turbines are also provided along with technical details.

Entrepreneurial Motivations: What Do We Still Need to Know?

Abstract: This paper attempts to renew interest in a line of research that largely has been ignored for two decades but which is critical to the study of entrepreneurial cognitions, intentions, and their con...