BACKGROUND A union/management system of job evaluation has been in place in the British Columbia (BC) sawmill industry since the late 1960s. This system uses an instrument, very similar to the job content questionnaire (JCQ) to evaluate psychosocial work conditions for sawmill jobs. METHODS Four experienced evaluators, one from the union and three from industry, independently estimated psycho...

OBJECTIVE To identify psychosocial aspects of work associated with common mental disorders in workers who maintain electrical transmission lines and equipment. METHODS A cross-sectional study was performed with 158 workers in the maintenance sector of an electric power company, in Northeastern Brazil. The main independent variable were the psychosocial aspects of work, measured according to t...

consumption of dairy products in terms of the health and economic terms is very important. the analysis of consumer behavior can help to take policies consistent and correct in this regard. in this study the demand for milk, yogurt and cheese was estimated by using time series data related to 1984-2009 in the framework of the idea of an almost ideal demand system. the results showed that all of...

I this paper we examine the impact of different types of advance demand information on firm profit and on the benefits of resource flexibility. Specifically, we consider a firm that must choose capacities of resources that will be used to satisfy stochastic demand for multiple products, where demands follow a multivariate normal distribution. Prior to the capacity decision, the firm receives in...

address to increasing demand for wood products and limited domestic resources, wood and wood products imports as one of the easily available and widespread ways in international context, is very important. among the policy on the imported wood market that is evident, apply a tariff and non-tariff barriers. know the reaction importers against the change priced is important to be determined and a...

this study aims to inspect the performance of the wastewater treatment system of the pars oil refinery. quantity and quality of wastewater are determined through samplings and measurements. the performance of system is evaluated considering total suspended solids, total dissolved solids, phosphate, chemical oxygen demand, biochemical oxygen demand, ammonia nitrogen, furfural, oil and ph. for pr...