1 Digital rectal examâthe doctor inserts a gloved finger into the rectum to feel for polyps. 2  Stool testâa sample of your stool is checked for blood.  Sigmoidoscopy âa thin, lighted, flexible tube is inserted into the rectum to examine the rectal area and the lower colon.
A photovoltaic system, also solar PV power system, or PV system, is a power system designed to supply usable solar power by means of photovoltaics.owadays, solar PV modules account for less than half of the system's overall cost, leaving the rest to the remaining BOS-components and to soft costs, which include customer acquisition, permitting, inspection and interconnection, installation labor and financing costs.
A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon.ssemblies of solar cells are used to make solar modules which generate electrical power from sunlight, as distinguished from a solar thermal module or solar hot water panel. A solar array generates solar power using solar energy.