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.
Small Solar Electric Systems. A small solar electric or photovoltaic system can be a reliable and pollution-free producer of electricity for your home or office. A small solar electric or photovoltaic (PV) system can be a reliable and pollution-free producer of electricity for your home or office.Small PV systems also provide a cost-effective power supply in locations where it is expensive or impossible to send electricity through conventional power lines.ecause PV technologies use both direct and scattered sunlight to create electricity, the solar resource across the United States is ample for home solar electric systems. However, the amount of power generated by a solar system at a particular site depends on how much of the sun's energy reaches it.