The steady state of the quasilinear convection-diffusion-reaction equation ut −∇(D(u)∇u) + b(u)∇u+ c(u) = 0 (1) is studied. Depending on the ratio between convection and diffusion coefficients, equation (1) ranges from parabolic to almost hyperbolic. From a numerical point of view two main difficulties can arise related with the existence of layers and/or the non smoothness of the coefficients....

This study was supported by ANSES (French agency for Food, Environmental and Occupational Health Safety, APR EST 2011 TeMIS, CDC/NIOSH (grant # R01OH008017-01) and by the National Center for Research Resources (NCRR) (grant # UL1 RR024992), a component of the National Institutes of Health (NIH), and NIH Roadmap for Medical Research. Its contents are solely the responsibility of the authors and ...

Why was this worksite chosen by NIOSH to study? In 1988, the union representing workers at the plant asked NIOSH to look into what appeared to be a cluster of bladder cancer cases. A cancer cluster is the occurrence of a greater than expected number of cancer cases in a group of people in a certain area over a period of time. A cancer cluster may be suspected when people report that several fam...

Occupational back pain in nurses (OBPN) constitutes a major source of morbidity in the health care environment. According to the National Institute for Occupational Safety and Health (NIOSH), occupational back injury is the second leading occupational injury in the United States. Among health care personnel, nurses have the highest rate of back pain, with an annual prevalence of 40-50% and a li...

A little over a year ago NIOSH published a document titled, “Preventing Fire Fighter Fatalities due to Heart Attacks and Other Sudden Cardiovascular Events.” The document presented the “lessons learned” from over 175 on-duty fire fighter fatalities due to sudden cardiac death. Specifically, the document described the magnitude of the problem, provided some background on the personal and occupat...

1. Let Z be a locally compact space and / i ^ O a positive Radon measure on Z. Let MR(Z} /X) be the Banach algebra of all bounded real-valued /x-measurable functions defined on Z, endowed with the norm/—»||/||oo = sup2 G^|/(0)| . Let CR(Z) be the subalgebraof MR{Z,\X) consisting of all bounded continuous functions on Z and 3C(Z) the subalgebra of all ƒ G CR (Z) having compact support. For two f...

Introduction: Atmospheric dust is one of the key constituents of the Martian atmosphere, and variations in dust loading can have a profound effect on the development of the mean circulation [1], and affect ice cloud formation [2] and other aspects of the climate system. While parameterisations for predicting rates of dust emission from the surface are now an important part of Martian general ci...

This study examined the effects of 3 lifting ranges and 3 lifting modes on maximum lifting capability and total lifting time. The results demonstrated that the maximum lifting capability for FK (from floor to knuckle height) was greater than that for KS (from knuckle height to shoulder height) or FS (from floor to shoulder height). Additionally, asymmetric lifting with initial trunk rotation de...