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.
Scientists worked with electricity long before they understood that current was made of electrons. The cathode tube was a prime example. By switching on some voltage, scientists could make fluorescent streams of electricity travel from the bottom part of a glass tube to the top -- but no one knew how it worked. Some thought the rays were a wave traveling through a mysterious ether which they thought permeated all space.