Monday, December 11, 2006

A Way of Life

0 comments Posted by Best-Mature at 10:02 PM

Many people use this manifestation as a way to talk about their survival and how they examine their everyday life. What they fail to distinguish, however, is the fact that their way of living is allied in a much broader type than they think. Anthropologists study these categories large, narrow, present, and past to try and find out what accurately a "way of life" was for individual cultures.

By studying these cultures Anthropologists try and realize different methods of survival. They have also exposed a few major social institutions that all cultures have a common link together. These social institution are the root for which culture is founded. In order for a culture to become distinct from other cultures it has to pertain different rules and change around these institutions. Anthropologists use these social institutional changes to appreciate the development of a culture and their way of being. They research these processes through fieldwork regularly. By using fieldwork as a means of research they can directly examine, interview, survey, and then analyze the situation. This gives them to lead of seeing with their own eyes what take place within a culture.

 

Tuesday, December 05, 2006

colour in the eye

0 comments Posted by Best-Mature at 3:47 AM

The ability of the human eye to distinguish colors is based upon the varying sensitivity of different cells in the retina to light of different wavelengths. The retina contains three types of color receptor cells, or cones. One type, relatively distinct from the other two, is most responsive to light that we perceive as violet, with wavelengths around 420 nm. (Cones of this type are sometimes called short-wavelength cones, S cones, or, misleadingly, blue cones.) The other two types are closely related genetically and chemically. One of them (sometimes called long-wavelength cones, L cones, or, misleadingly, red cones) is most sensitive to light we perceive as yellowish-green, with wavelengths around 564 nm; the other type (sometimes called middle-wavelength cones, M cones, or misleadingly, green cones) is most sensitive to light perceived as green, with wavelengths around 534 nm.

Light, no matter how complex its composition of wavelengths is reduced to three color components by the eye. For each location in the visual field, the three types of cones yield three signals based on the extent to which each is stimulated. These values are sometimes called tristimulus values.

 

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