Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber that is roughly the diameter of a human hair. The light forms an electromagnetic carrier wave that is modulated to carry information. Each optical fiber is capable of carrying an enormous amount of…

Renewable energy systems are beginning to appear everywhere. Solar modules are creating "blue roofs" that convert the energy from the sun into household electricity. Solar thermal systems on roofs can generate hot water. Wind turbines catch breezes to provide even more electricity. Recommendations for saving energy, specifying systems for…

The guide was designed to help immigrants and refugees, learners of English as a Second Language, prepare for employment in the United States. While the focus is on development of job search, application, and work environment skills, development of appropriate vocabulary, some grammar, and communication skills are also emphasized. The materials…