We hypothesized that patients with chronic obstructive pulmonary disease developing contractile fatigue of the quadriceps during cycle exercise may have characteristic metabolic and muscle features that could increase their susceptibility to fatigue, thus differentiating them from those who do not develop fatigue. We examined, in 32 patients, the fiber-type proportion, enzymatic activities, and...

Military training creates unique noise hazards including high impulse noise content. The need for hearing protection needs to be considered alongside the need for effective voice communication. This requires a hearing protector with high impulse protection that minimally impedes low intensity voice communication. These level dependant devices are called non-linear hearing protectors. A range of...

In Zimbabwe, over 25% of adults are HIV positive [1]. To curtail the epidemic, the government started promoting condom use, especially in non-marital relationships. Since 1996, Population Services International (PSI) has implemented a USAID/British Department for International Development-funded condom social marketing program that distributes subsidized Protector Plus condoms, and promotes the...

Surge protective device is a part of internal lightning protection and it crucially to divert the certain amount of surges to the ground before the protected load able to handle. Therefore, this paper studying the enhancement of SPD through the effect of adding a filter in hybrid surge protection circuit using simulation modeling. Ordinarily, filter is used as in eliminating noises in certain a...