Thesis on Remote Control Lighting System (Chapter Ii and...

Chapter II THEORETICAL AND CONCEPTUAL FRAMEWORK This portion of the chapter presents the review of related literature and studies linked with remote controlled lighting system which will provide necessary background on the subject of the present study. The related literature was taken from articles on published journals, and electronic materials while related studies were taken from the manufacturer’s overview of the related prototypes. Review of Related Literature and Studies Lighting is the deliberate application of light to achieve some aesthetic or practical effect. Lighting includes use of both artificial light sources such as lamps and natural illumination of interiors from daylight. Daylighting (through windows, skylights,†¦show more content†¦It can dim most sources, including HID, but have very restricted dimming range, typically from 100 percent to about 75 percent light output. Another one is â€Å"Branch-Circuit-Based Dimmers† that dim entire branch circuits and do not require that ballasts be changed; they are usually solid-state, employing waveform-shaping dimming circuits. Generally dim lamps from full output to about 50 percent. At 50 percent, lamp operating characteristics can shorten lamp life. Other control methods include â€Å"Dynamic Controllers† that dim individual ballasts, or small groups; and typically use waveform-shaping electronic circuits. They do not require changing ballasts and generally dim between 30 percent and full output, and may increase lamp flicker. â€Å"Dimming Core-Coil Ballasts† dim individual lamps or lamp pairs; depending on lamp and control circuitry, can dim from 100 percent down to about 5-8 percent of full light output. Other systems, using specific combinations of ballasts, lamps, and controllers, provide about 20 percent to full output. Dimming core-coil ballasts may increase audible hum. â€Å"Dimmable Electronic Ballasts† dim individual lamps or groups of two, three, or four lamps. Depending on the control circuit, they can provide full-range dimming (from less than 10 percent to 100 percent). The first machines to be operated by remote control were used mainly for military purposes. Radio-controlled motorboats,Show MoreRelatedOrganisational Theory230255 Words   |  922 Pagesorganization theory within the scholarly debates on modernism and postmodernism, and provides an advanced introduction to the heterogeneous study of organizations, including chapters on phenomenology, critical theory and psychoanalysis. Like all good textbooks, the book is accessible, well researched and readers are encouraged to view chapters as a starting point for getting to grips with the field of organization theory. 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