This paper presents the development of a novel framework that optimizes the evacuation of large cities using multiple modes including vehicular traffic, rapid transit, and mass transit shuttle buses. A large-scale evacuation model is developed for the evacuation of the City of Toronto in cases of emergency. A demand estimation model is first designed to accurately quantify the evacuation demand...

This paper is an introduction to an elegant and powerful technique in modern optics: Pound– Drever–Hall laser frequency stabilization. This introduction is primarily meant to be conceptual, but it includes enough quantitative detail to allow the reader to immediately design a real setup, suitable for research or industrial application. The intended audience is both the researcher learning the t...

In the rapidly changing field of information systems, every researcher faces important choices about what research topics to explore and how to pursue that research. This paper addresses these questions by summarizing a panel discussion at the 2001 Decision Sciences Institute (DSI) annual meeting. The first part of this paper provides a framework explaining factors that can be used in selecting...

Methods 87 children were recruited during random clinic visits to rheumatology clinics at Tygerberg and Groote Schuur Hospital between April 2010 and April 2011. Children were diagnosed using International League of Associations for Rheumatology (ILAR) 2001 classification criteria. Consent was obtained, medical records examined, Childhood Health Assessment Questionnaires (CHAQ), visual analogue...