The purpose of CCSA's National Policy Working Group (NPWG) is to provide a forum or focus for agencies, or individuals with an expertise in substance abuse to participate in a broad discussion and analyze policy issues and topics from a national perspective.The NPWG is not an advocacy group, but provides a "best practice" analysis and positions for consideration by the CCSA Board and the broade...

UNLABELLED Residential air exchange rates (AERs) are vital in understanding the temporal and spatial drivers of indoor air quality (IAQ). Several methods to quantify AERs have been used in IAQ research, often with the assumption that the home is a single, well-mixed air zone. Since 2005, Health Canada has conducted IAQ studies across Canada in which AERs were measured using the perfluorocarbon ...

The aim of this study is to investigate the affect of firm size on profitability. In this study, data of 200 companies which were active in Istanbul Stock Exchange (ISE) between the years 2008-2011 has been used. “Return on Assets” (ROA) has been used as indicators of firm profitability and total assets, total sales and number of employees have been used as indicators of size. Multiple regressi...

In this paper, the American exchange option (AEO) valuation problem is modelled as a free boundary problem. The critical stock price for an AEO is satisfied an integral equation implicitly. When the remaining time is large enough, an asymptotic formula is provided for pricing an AEO. The numerical results reveal that our asymptotic pricing formula is robust and accurate for the long-term AEO. K...

From its beginning, HIV has primarily affected marginalized populations, such as injection drug users, gay, bisexual and other men who have sex with men (GBMSM), and minority racial and ethnic groups. HIV is a disease that, from the start, has been strongly influenced by issues related to social justice and health equity due to its intersection with behaviors among at-risk populations. While so...

the “Flash crash” of 6 may 2010 amplified the debate over the relative merits of HFt, which has preoccupied market participants and regulators for years . Since the advent of HFt, order-to-trade ratios and the volume of daily messages have increased dramatically: the toronto Stock exchange (tSX) order-to-trade ratio more than quadrupled between January 2005 and april 2011 (Chart 1) . this incre...

AIMS To examine the effect of a needle exchange program (NEP) on incidence of injection cessation and change in injection frequency; to explore predictors for injection cessation and change in injection frequency; and to assess whether injection quitters transitioned to non-injected drug use. DESIGN AND SETTING Between 1997 and 2002, 901 injection drug users (IDUs) were recruited from an NEP ...

The authors explored the validity of two perspectives as to how managers evaluate subordinates who resist downward influence attempts: a uniformly dysfunctional perspective (i.e., managers regard all manifestations of resistance as indicators of ineffective influence and rate subordinates unfavorably when they resist) and a multifunctional perspective (i.e., managers regard some manifestations ...

A versatile method for assessing protein properties via magnetic resonance imaging (MRI) through chemical exchange saturation transfer (CEST) modality is described. The observed CEST signal changes allow monitoring of protein aggregation processes, protein folding/unfolding steps and interaction with lipid membranes.