Ulcerative colitis is a chronic, relapsing condition. Chronic means that it is persistent and ongoing. Relapsing means that there are times when symptoms flare up (relapse) and times when there are few or no symptoms (remission). The severity of symptoms and how frequently they occur vary from person to person.
Photovoltaics (PV) is the name of a method of converting solar energy into direct current electricity using semiconducting materials that exhibit the photovoltaic effect, a phenomenon commonly studied in physics, photochemistry and electrochemistry.
A solar photovoltaic (PV) module is an array of cells containing semiconductor materials that, with the help of an inverter, convert solar radiation into direct current electricity that can be used in a home or business. A PV array can be placed on a roof, or it can be mounted on the ground.