Traditional research on machine scheduling focuses on job allocation and sequencing to optimize certain objective functions that are defined in job completion times. With regard to environmental concerns, energy consumption becomes another critical concern in high-performance systems. In this paper, we address the scheduling problem in a multiple machine system where the computing speeds of the...

BACKGROUND The long-term effects of leisure-time physical activity (LTPA) on job strain have not been assessed in a large prospective population-based cohort study. AIMS To examine the relationship between the LTPA and the prevalence of job strain. METHODS The participants were 861 full-time employees (406 men and 455 women), aged 24-39 years in 2001, from the ongoing Cardiovascular Risk in...

BACKGROUND The association between social relationships and lower mortality has been well documented in Western countries. This study aims to investigate that association among elderly Japanese in a rural area. METHODS An analysis was conducted with 1,994 subjects (58.1% women), 78.3% of the total elderly aged 65 and older in a town, who were independent in activities of daily living. A basel...

The theoretical effects of labour regulations such as employment protection legislation (EPL) on innovation is ambiguous, and empirical evidence has thus far been inconclusive. EPL increases job security and the greater enforceability of job contracts may increase worker investment in innovative activity. On the other hand EPL increases adjustment costs faced by firms, and this may lead to unde...

BACKGROUND A high need for recovery after work can be regarded as a short term adverse effect of working day stressors and the person's inability to cope and recover. Consequently, it might be an intermediate factor between job stressors and cardiovascular disease (CVD). AIM To investigate, in a longitudinal study, the relation between need for recovery and subsequent CVD. METHODS Data from...

Title of Dissertation: HETEROGENEITY AND INPUT REALLOCATION Eugénio Pinto, Doctor of Philosophy, 2006 Dissertation Directed by: Professor John Haltiwanger, Department of Economics Professor John Shea, Department of Economics In this dissertation, we analyze some patterns of aggregate job reallocation that are significantly determined by the coexistence of heterogeneous businesses in any industr...

INTRODUCTION This study investigates the workplace experiences of people with chronic diseases, including their work limitations, emotional health, concerns about discrimination, and support from colleagues and employer. This study identifies the factors that contribute to work adjustment (job tenure and job satisfaction). METHODS A purposive sample of 136 persons aged 18 to 60 with chronic d...