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According to the theory of degeneration, a host of individual and social pathologies in a finite network of diseases, disorders and moral habits could be explained by a biologically based affliction. The primary symptoms of the affliction were thought to be a weakening of the vital forces and willpower of its victim.
Chronically isolated individuals are also more likely to develop inflammation-related diseases thus providing a plausible biological connection between social variables (e.g. isolation, rejection, social stress, and socioeconomic status) and disease risk and mortality, namely heightened inflammation mediated by differential gene expression.
Leprosy, also known as Hansen's Disease, is caused by a bacillus, Mycobacterium leprae. It is a chronic disease with an incubation period of up to five years. Symptoms often include irritation or erosion of the skin, and effects on the peripheral nerves , mucosa of the upper respiratory tract and eyes.
Damage is cumulative over one's lifetime, so that permanent effects may not be evident for some time after exposure. [19] Ultraviolet radiation of wavelengths shorter than 300 nm (actinic rays) can damage the corneal epithelium. This is most commonly the result of exposure to the sun at high altitude, and in areas where shorter wavelengths are ...
Lamb waves propagate in solid plates or spheres. [1] They are elastic waves whose particle motion lies in the plane that contains the direction of wave propagation and the direction perpendicular to the plate. In 1917, the English mathematician Horace Lamb published his classic analysis and description of acoustic waves of this type. Their ...
Due to their higher speed, the P and S waves generated by an earthquake arrive before the surface waves. However, the particle motion of surface waves is larger than that of body waves, so the surface waves tend to cause more damage. In the case of Rayleigh waves, the motion is of a rolling nature, similar to an ocean surface wave. The ...
Although health research is often organized by disease categories or organ systems, theoretical development in social epidemiology is typically organized around factors that influence health (i.e., health determinants rather than health outcomes). Many social factors are thought to be relevant for a wide range of health domains.
North America is known for being a leading nation in regards to industrialization and modernization, but the United States lacks federal laws regarding health care as a basic human right. This lag of health care security causes subsequent issues with pharmaceutical competition, lack of care for the elderly, and little attention to alternative ...