BACKGROUND Using a large cohort of western Canadian sawmill workers (n = 28,794), the association between psychosocial work conditions and attempted and completed suicide was investigated. METHODS Records of attempted and completed suicide were accessed through a provincial hospital discharge registry to identify cases that were then matched using a nested case control method. Psychosocial wo...

The menisci have an essential function in force transmission across the knee. Injuries to the menisci are common. The indications for repair should be expanded, as the results of partial meniscectomy may deteriorate over time. Tears in younger, higher demand patients should be prepared to optimize the healing environment and be meticulously repaired, particularly in the setting of concurrent an...

background: physical and psychological job demands in combination with the degree of control a worker has over task completion, play an important role in reducing stress. occupational stress is an important, modifiable factor affecting work disability. however, the effectiveness of reducing job demands or increasing job control remains unclear, particularly for outcomes of interest to employers...

1 Bassham, J. A., A. A. Benson, L. D. Kay, A. Z. Harris, A. T. Wilson, and M. Calvin, J. Am Chem. Soc. 76, 1760 (1954). 2 Metzner, H., B. Metzner, and M. Calvin, Arch. Biochem. Biophys., 74, 1 (1958). 3 Metzner, H., H. Simon, B. Metzner, and M. Calvin, these PROCEEDINGS, 43, 892 (1957). 4Metzner, H., B. Metzner, and M. Calvin, these PROCEEDINGS, 44, 205 (1958). Wilzbach, K. E., W. Y. Sykes, Sci...

Particle Swarm Optimization (PSO) is a metaheuristic optimization algorithm that owes much of its allure to its simplicity and its high effectiveness in solving sophisticated optimization problems. However, since the performance of the standard PSO is prone to being trapped in local extrema, abundant variants of PSO have been proposed by far. For instance, Fuzzy Adaptive PSO (FAPSO) algorithms ...

In this work we tried to solve some non-linear problems of analytic photogrammetry. These problems are also widely flowed into the digital photogrammetry. The model formation considering the solution of the Relative Orientation, and the object reconstruction considering the solution of the Absolute Orientation have non-linear functional models. These models need an exhaustive research of the pr...

the main logic behind the demand for life insurance is to hedge against the labor income uncertainty due to premature death of a wage earner. in other words, life insurance is the device by which this labor income uncertainty is handled. for insurers, the uncertainty arises from the lack of knowledge about the age of death of the wage earner. this paper attempts to derive life insurance demand ...

What happens to the demand of the print version if a magazine launches a website? This question is empirically analyzed for the German women's magazine market, a particularly relevant segment of the German magazine market. Static and dynamic nested logit–type demand models are estimated on quarterly panel data covering the period 1996 to 2001. Main findings are that website provision does not h...

regard to increasing demand for organic agricultural products, awareness of costs and profitability of organic products can help to decision planners of agricultural sector, and particularly farmers. this study has tried to calculate cost and profitability of cotton product in two different conventional and organic ways (procedure) of production using 253 cross-sectional data from khorasan raza...