Mirror Symmetry and Other Miracles in Superstring Theory

The dominance of string theory in the research landscape of quantum gravity physics (despite any direct experimental evidence) can, I think, be justified in a variety of ways. Here I focus on an argument from mathematical fertility, broadly similar to Hilary Putnam's 'no miracles argument' that, I argue, many string theorists in fact espouse. String theory leads to many surprising, useful, and well-confirmed mathematical 'predictions' - here I focus on mirror symmetry. These predictions are made on the basis of general physical principles entering into string theory. The success of the mathematical predictions are then seen as evidence for framework that generated them. I attempt to defend this argument, but there are nonetheless some serious objections to be faced. These objections can only be evaded at a high (philosophical) price.Comment: For submission to a Foundations of Physics special issue on "Forty Years Of String Theory: Reflecting On the Foundations" (edited by G. `t Hooft, E. Verlinde, D. Dieks and S. de Haro)

Involving Immigrants in Youth Sport Coaching: Part 1. A Literature Review and Quantitative Profile

Little, if any, previous research has investigated the involvement of immigrants in sport coaching. This is the first of a series of two articles that focus on this issue. In this article, following a general literature review, structured retrospective interviews (n = 29) are used to construct a profile of immigrant youth sport coaches. Two distinct profiles were identified: (a) leisure-oriented coaches, who had not coached prior to immigration; and (b) career-oriented coaches, who had coached prior to immigration. Statistically significant differences (p < .05) were found between groups relating to athletic experience, sport-related education, time between immigration and initiation of coaching, and coaching of their own children. Separate pathways to coaching involvement after immigration were identified for both profiles