In fluid dynamics, the wave height of a surface wave is the difference between the elevations of a crest and a neighbouring trough. Significant wave height H 1/3, or H s or H sig, in the time domain, is defined as the average height of the one-third part of the measured wavesâwhich are N in numberâhaving the largest wave heights:
Hair loss in men and hormones are closely related. The relationship between testosterone and hair loss is due to dihydrotestosterone (DHT), a derivative of testosterone. DHT can cause hair follicles to regress and die, resulting in premature balding. In addition to feeling severe fatigue, men with low testosterone often lose their drive and initiative. Despite getting plenty of sleep, men suffering from low testosterone often find it harder to get motivated to conquer daily activities. In some cases, low testosterone can cause insomnia or other sleep disturbances.
Men make estrogen from testosterone, and women do, too, Finkelstein said. So when men age and testosterone levels naturally decline, men also experience a drop in levels of estrogen circulating in their blood. The new results suggest that when estrogen levels drop, men experience some of the same consequences that women do after menopause: They have more bone loss, their libido declines, and they gain more fat around their midsection. [Macho Man: 10 Wild Facts About the Male Body]