The Traditional Performance Appraisal Process. In the conventional performance appraisal or review process, the manager annually writes his opinions of the performance of a reporting staff member on a document supplied by the HR department. In some organizations, the staff member is asked to fill out a self-review to share with the supervisor.
Gimpy. Okay, here's a basic synopsis for you. Solar cells ese photovoltaics to convert sunlight directly into electricity by converting photons (light particles) into electrons (negatively charged particles). Photovoltaic cells are made of semiconductors and silicon, mixed with other material.
Plants absorb energy from the sun and convert it into chemical energy. Herbivores get energy by eating plants while carnivores get energy by eating herbivores and other carnivores. Trace the energy back to the source and you arrive at the sun. But converting solar energy into electricity is tricky. Photovoltaics can do the trick. These are materials that can absorb photons -- the basic quantum units of light -- and convert them into electricity. Edmond Becquerel discovered the photovoltaic effect in 1839 while experimenting with an electrolytic cell.