Schwinger Model Mass Anomalous Dimension

The mass anomalous dimension for several gauge theories with an infrared fixed point has recently been determined using the mode number of the Dirac operator. In order to better understand the sources of systematic error in this method, we apply it to a simpler model, the massive Schwinger model with two flavours of fermions, where analytical results are available for comparison with the lattice data.Comment: 7 pages, 3 figures, talk given at the 33rd International Symposium on Lattice Field Theory, 14 - 18 July 2015, Kobe, Japan. Reference adde

Issue 09: Temporary Migration Policy, Trends, and Ontario’s Economy: 2000-2012

Ontario is unique when it comes to international migration in Canada. It is the leading province in overall flows, including individuals participating in the temporary foreign workers (TFWs) program. Employers hire TFWs on a contractual basis to work here, and from 2000 to 2012, about 800,000 came to Ontario – representing 40% of Canada’s total TFWs. Despite their growing numbers, economic importance, and the rapidly changing landscape of federal immigration policy, there is little work looking at the Temporary Foreign Worker Program or its economic impact on the province. In this research, we found that employers in specific industries, like agriculture, senior business management, and childcare, tended to hire TFWs and did so through specific parts of the Program. Our preliminary results show that the influx of TFWs was statistically associated with shorter job tenure, higher Employment Insurance receipts, and increases in wages in some jobs, but lower wages in others. These effects are particularly significant in industries with large numbers of TFWs. So while TFWs undoubtedly contribute to Ontario’s overall economic development, more research should be done to understand their specific economic effects on particular industries and demographics. This is especially important given the provincial responsibilities in labour, health and education, which federal immigration policy directly impacts

Student-as-producer: reflections on a 6-week trial aimed at producing scientist-practitioners in sport coaching

Reflections on a 6-week trial aimed at producing scientist-practitioners in sport coachin

Transient spatiotemporal chaos collapses into periodic and steady states in an electrically-coupled neural ring network

Chaotic behavior in a spatially extended system is often referred to as spatiotemporal chaos. The trajectories of a system as it evolves through state space are described by irregular spatial and temporal patterns. In mathematical biology, spatiotemporal chaos has been demonstrated in chemotaxis models (Painter & Hillen, 2011) predator-prey models (Sherratt, J. & Fowler, A., 1995) and the Hogdkin-Huxley neural model (Wang, Lu, & Chen, 2006). Transient chaos is a special case of chaotic dynamics in which the system dynamics collapses without external perturbation. Rather, collapse is an intrinsic property of the system. Here, we diff usively couple many spiking neurons into a ring network and fi nd that the network dynamics can collapse on to two diff erent species of attractor: the limit cycle and the steady-state solution

"Indigested in the Scenes: Hamlet's Dramatic Theory and Ours"

(Forthcoming in PMLA, January 2018) Discussions of the relationship between drama and performance have been dominated by two symmetrical, emancipatory impulses. Performance scholars have, for the past half-century, sought to liberate performance from the authority of the drama. Literary scholars have, for centuries if not millennia, sought to distinguish a “literary” dimension of the dramatic text free of the flux of performance. This essay diagnoses in Shakespeare’s Hamlet an alternative story about the relationship between drama and performance. Paying refreshed attention to the earlier and less famous of Hamlet’s statements of dramatic theory—his blurb for the “excellent play” featuring Aeneas’ speech to Dido—I find Hamlet bringing drama, especially in its “literary” dimension, crashing back into performance. This collision does not reinstitute the authority of the text; rather, it radically democratizes the scene of dramatic performance by “indigesting” the behaviors of the participants therein

Vibrato Monte Carlo and the calculation of greeks

In computational ¯nance Monte Carlo simulation can be used to calculate the correct prices of ¯nancial options, and to compute the values of the as- sociated Greeks (the derivatives of the option price with respect to certain input parameters). The main methods used for the calculation of Greeks are finite difference, likelihood ratio, and pathwise sensitivity. Each of these has its limitations and in particular the pathwise sensitivity approach may not be used for an option whose payoff function is discontinuous. Vibrato Monte Carlo is a new idea that addresses the limitations of previous methods; it combines the pathwise sensitivity approach for the SDE path calculation with the likelihood ratio method for payoff evaluation. This thesis discusses Vibrato Monte Carlo approximations for a digital option on an asset follow- ing one-dimensional geometric Brownian motion