A case-control study of lung cancer mortality in U.S. railroad workers in jobs with and without diesel exhaust exposure is reanalyzed using a new threshold regression methodology. The study included 1256 workers who died of lung cancer and 2385 controls who died primarily of circulatory system diseases. Diesel exhaust exposure was assessed using railroad job history from the US Railroad Retirem...

This paper addresses some single-machine scheduling problems with past-sequence-dependent (p-s-d) delivery times and deteriorating jobs. By the past-sequence-dependent (p-s-d) delivery times, we mean that the delivery time of any job is proportional to the job’s waiting time. It is assumed that the deterioration process reflects a increase in the process time as a function of the job’s starting...

In enterprise management, there are often multiple agents competing for the same products to reduce production cost. On this basis, paper investigates a two-agent slack due-date single-machine scheduling problem with deteriorating jobs, where processing time of job is extended as function position-dependent workload, resource allocation and common deterioration rate. The goal find optimal seque...

BACKGROND Following MPOWER's 2011 report, a study was conducted to quantify the implementation of MPOWER tobacco control policies in the Eastern Mediterranean Region (EMR) in 2013 to assess any possible change during the last two years.  METHODS In this cross sectional study, based on 10 categories mentioned in MPOWER 2013, a checklist was designed and its scoring was agreed upon by Iranian a...

La0.7Sr0.3MnO3, a half-metallic ferromagnet with full spin polarization, is generally used as a standard spin injector in heterostructures. However, the magnetism of La0.7Sr0.3MnO3 is strongly modified near interfaces, which was addressed as "dead-layer" phenomenon whose origin is still controversial. Here, both magnetic and structural properties of La0.7Sr0.3MnO3/SrTiO3 heterostructures were i...

PURPOSE To investigate IOL deterioration by conducting severe accelerated deterioration testing of acrylic IOLs. SETTING Department of Ophthalmology, Tokai University School of Medicine Methods: Severe accelerated deterioration tests performed on 7 types of acrylic IOLs simulated 20 years of deterioration. IOLs were placed in a screw tube bottle containing ultra-pure water and kept in an oven...