On the efficacy of construction site safety inspections

The purpose of this paper is to measure the impact of onsite safety inspections on the frequency of work related injuries in the Alberta construction sector for the period 1987 to 1992. The data are disaggregated by sub-industry allowing different risk levels to be associated with different work activities. In addition, within the sample period there is a dramatic decrease in inspection activity providing a natural experiment into the necessity of continued inspection effort. We observe no measurable effect of onsite safety inspections altering the risk of accident and injury. Moreover, the decrease in inspection levels within the sample period is not associated with an increase in the number of work related injuries

Anniversary of the discovery/isolation of the yeast centromere by Clarke and Carbon

ABSTRACT The first centromere was isolated 35 years ago by Louise Clarke and John Car-bon from budding yeast. They embarked on their journey with rudimentary molecular tools (by today’s standards) and little knowledge of the structure of a chromosome, much less the nature of a centromere. Their discovery opened up a new field, as centromeres have now been isolated from fungi and numerous plants and animals, including mammals. Budding yeast and several other fungi have small centromeres with short, well-defined sequences, known as point centromeres, whereas regional centromeres span several kilobases up to megabases and do not seem to have DNA sequence specificity. Centromeres are at the heart of artificial chromosomes, and we have seen the birth of synthetic centromeres in budding and fission yeast and mammals. The diversity in centromeres throughout phylogeny belie conserved functions that are only beginning to be understood. It was ∼35 years ago that centromere DNA was first discovered by Louise Clarke and John Carbon working at the University of California, Santa Barbara (Clarke and Carbon, 1980, 1985). To ap-preciate the pioneering aspect of this work, it is important to con

Stripers, bailarinas exóticas, eróticas: identidad e inmigración en la construcción del Estado canadiense Stripers, erotic and exotic dancers: immigration and identity in the construction of the canadian nation-State

Este artículo presenta una discusión sobre la migración de mujeres Latinoamericanas para trabajar en la industria del sexo en Canadá, como bailarinas exóticas, a través de visas temporales de trabajo. El objetivo es demostrar que esa migración se encuentra determinada en un contexto de relaciones desiguales de poder enmarcadas por las políticas migratorias canadienses, relaciones de explotación económica de Norte América hacia Latinoamérica, construcciones raciales y racistas, y relaciones patriarcales de género, en el que el trabajo sexual es una de las pocas opciones laborales que tienen las mujeres.<br>This article discusses how the migration of Latin American women to work in the sex trade, specifically as exotic dancers, as temporary workers is framed within a specific context of Canadian immigration policies, uneven economic relationships between North America and Latin America, racial and racist constructions and sexist gender relations where sex work is one of the few working possibilities that women have