FEMLAB and MicroWaveLab, two finite element solvers, are evaluated in the context of needs of microwave power engineering. Limitations of the codes are identified by simulation of characteristics of applicators based on circular and rectangular waveguides as well as coaxial-to-ridgedand coaxial-to-double-ridged waveguide transitions. Results are verified by QuickWave-3D.

in this paper, the problem of calculating the stress intensity factor (sif) for an orthotropic thick-walled cylinder with a small radial crack subject to internal pressure is considered. the crack is assumed to be an edge crack on the external radius of the cylinder. the stress intensity factor is calculated by superposition of an uncracked cylinder with uniform stress distribution and a cylind...

In 1997 we published an article in EHP on cytogenetic and thyroid hormonal changes in 49 heavily exposed workers applying ethylene bisdithiocarbamate (EBDC) fungicide to tomatoes, based on a collaborative study done by the U.S. National Institute for Occupational Safety and Health and the Institute of Public Health in Mexico (Steenland et al. 1997). EBDCs are a common class of fungicides (e.g.,...

While precautionary efforts are being made to minimize human health problems associated with agricultural pesticides, the continued occurrence of occupational poisoning from these chemicals raises major concerns among stakeholders. Information gap on human health problems associated with pesticides poses major obstacles to making informed policy decisions, particularly in developing countries w...

Custom applicators intensively apply herbicides to corn and soybean fields each spring. The primary objective of this study was to characterize the exposure distributions of the herbicides alachlor, atrazine, 2,4-D 2-ethylhexyl ester (2,4-D EH), and metolachlor among a group of applicators during the spring pre-emergent spray season. A secondary objective was to evaluate determinants of exposur...

PURPOSE T2 magnetic resonance imaging (MRI) is recommended as the imaging modality for image-guided brachytherapy. In locally advanced cervical carcinoma, combined endocavitary and interstitial applicators are appropriate (Vienna or Utrecht). To cover extensive disease, Template Benidorm (TB) was developed. Treatment planning system applicator libraries are currently unavailable for the Utrecht...

This study addresses the measurements of glyphosate exposure received by 14 workers employed at two tree nurseries. The applicators, weeders, and scouts monitored all wore normal work clothing, which for applicators was a protective suit, rubber gloves and boots. Measurements were made of the glyphosate that was dislodged from conifer seedlings during water rinses taken twice weekly from May th...

BACKGROUND Telomere length (TL) in surrogate tissues may be influenced by environmental exposures. OBJECTIVE We aimed to determine whether lifetime pesticides use is associated with buccal cell TL. METHODS We examined buccal cell TL in relation to lifetime use of 48 pesticides for 1,234 cancer-free white male pesticide applicators in the Agricultural Health Study (AHS), a prospective cohort...

PURPOSE Accelerated partial breast irradiation (APBI) with balloon and strut adjusted volume implants (SAVI) show promising results with excellent tumor control and minimal toxicity. Knowing the factors that contribute to a high skin dose, rib dose, and D95 coverage may reduce toxicity, improve tumor control, and help properly predict patient outcomes following APBI. METHODS AND MATERIALS A r...