Demand for lead-free, free-cutting brass is increasing in response to lead regulations Europe. The authors of this paper have attempted develop a lead-free with an α + β two-phase microstructure, which different from existing C6932 alloy. As result basic investigations, it was found that the addition Si β-brass dramatically reduces cutting resistance due effect appears be reduction stacking def...

The results of substantiation the improved technology for manufacturing frequency-selective electromagnetic shields are presented. improvement this was ensured by following: 1) inclusion elements in form classical Archimedes spirals, formed from foil materials, into volume manufactured to ensure properties such shields; 2) fixing specified thermal pressing. indicated features determine main adv...

We have designed and tested a set of five miniature nested magnetic shields constructed of high-permeability material, with external volumes for the individual shielding layers ranging from 0.01 to 2.5 cm(3). We present measurements of the longitudinal and transverse shielding factors (the ratio of external to internal magnetic field) of both individual shields and combinations of up to three l...

1. Marigo FA, Finger PT, McCormick SA, et al. Iris and ciliary body melanomas. Arch Ophthalmol. 2000;118:1515-1521. 2. SunbaMS,RahiAH,MorganG.Tumorsof theanterior uvea, I: metastasizing malignant melanoma of the iris. Arch Ophthalmol. 1980;98:82-85. 3. Planten JT. An unnecessary mistake. Ophthalmologica. 1970;160:369-371. 4. GrossniklausHE,BrownRH,StultingRD,etal. Iris melanomaseeding througha ...

A pendant was claimed to provide numerous health benefits, including reduced stress, increased strength, and protection from electromagnetic radiation from computers and mobile phones. Three experiments tested the effectiveness of this pendant's effect as a bioelectric shield. In the first experiment, 12 subjects who work with computers wore shields (6 real, 6 sham) for several weeks and were r...

In this article, we outline our view of how concentration shields against distraction. We argue that higher levels of concentration make people less susceptible to distraction for two reasons. One reason is that the undesired processing of the background environment is reduced. For example, when people play a difficult video game, as opposed to an easy game, they are less likely to notice what ...

BACKGROUND Medical doctors who perform C-arm fluoroscopy-guided procedures are exposed to X-ray radiation. Therefore, radiation-protective shields are recommended to protect these doctors from radiation. For the past several years, these protective shields have sometimes been used without regular inspection. The aim of this study was to investigate the degree of damage to radiation-protective s...

1Wildlife and Ecology Unit, Veterinary Genetics Laboratory, University of California, One Shields Avenue, Davis, CA 95616, USA 2Section of Evolution and Ecology, University of California, One Shields Avenue, Davis, CA 95616, USA 3Department of Biology, University of Missouri – St Louis, St. Louis, MO 63121, USA 4Department of Zoology, University of Florida, PO Box 118525, Gainesville, FL 32611,...