Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"White LED"”.
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White LED for general illumination applications
… efficient manner. Early light emitting devices (LEDs) were originally limited their use for low power indication lights. Later research produces high brightness LEDs (HB-LEDs) as well as blue color LEDs. This brings to reality of the entire visible light spectrum. White light is also made …
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Seeing the light: germination, growth and flowering responses in wildflowers under artificial nighttime lighting
… of photoperiod extension that comes from cool white light-emitting diode (LED) street lighting at ground-level illuminance on seed germination, individual plant growth and flowering in wildflower species. Seed germination in Cichorium intybus was accelerated by this lighting treatment. …
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Commercialization of Quantum Dot White Light Emitting Diode technology
It is well known that the use of high-brightness LEDs for illumination has the potential to substitute conventional lighting and revolutionize the lighting industry over the next 10 to 20 years. However, successful penetration of this extremely large lighting market would require vast improvements …
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An automotive interior lighting application using white light-emitting diodes
In this thesis the commercially available white light-emitting diode (LED) with its inherent efficiency, longevity and mechanical strength, is used to show, that success in energy efficiency can be obtained. Two cases are used to illustrate the need for efficient demand-side technology: the …
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White light emitting diode as liquid crystal display backlight
The discovery of high brightness (white) light emitting diode (LED) is considered as a real threat to the current lighting industry in various applications. One of the most promising sectors would be using white LED to replace the current Cold Cathode Fluorescent Light (CCFL) technology as the …
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The Effect of Jungle Light Spectrum on the Fearfulness of Commercial Broiler Chickens
… dim lighting programs (2 – 5 lux) using “white” LED light. Chickens are prey animals that depend on their vision safety. Chickens “see” the word differently than humans and other animals in several significant ways. They have four cones for color vision compared to three for humans. This …
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Commercialization of gallium nitride nanorod arrays on silicon for solid-state lighting
… as a replacement. Currently, state-of-the-art white LEDs are made up of thin films of GaN and InGaN grown on sapphire substrates. A new LED structure design is proposed, in which GaN nanorod arrays are grown on silicon substrates. This new structure could be fabricated using anodized aluminum …
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Smuts and the politics of colonial expansion : South African strategy in regard to South-West Africa [Namibia] and the League of Nations Mandate, c.1914-1924
… the territory because of his desire to create a white-led superstate in southern Africa, independent of European influence and with regional hegemony, and that the annexation of South-West Africa was an important step in that direction for Smuts. Additonally, I assess Smuts's successes and …
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Chip-on-the-Tip-Endoskope mit Variooptik und LED-Beleuchtung für den medizinischen Einsatz
… dem ersten Endoskop wird zur Beleuchtung eine LED an der Endoskopspitze genutzt, welche die sonst übliche teure externe Kaltlichtquelle ersetzt. Somit entfällt auch das schwere Lichtleitkabel, welches von den meisten Chirurgen als sehr hinderlich empfunden wird. Durch den Aufbau treten keine …
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The General Steam Navigation Company c.1850-1913: a business history
… and Loss Accounts and Balance Sheets are detailed throughout. These, together with information on trades and cargoes, including live animal imports, in an increasingly competitive environment, are recorded in a series of chapters each covering a period of the Company's development. The …
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Ontogeny of Prepulse Inhibition Across Sensory Systems
… trials for auditory (85dB(A) prepulse white noise) and visual (200 lux, white LED) prepulses (20 msec) for PPI [70dB(A) background, 5-min acclimation period, 6 ASR trials, 72 PPI trials (ISIs of 0, 8, 40, 80, 120, and 4000 ms, 6-trial blocks, v Latin square design)]. Peak amplitude …
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HIGH TEMPERATURE ZnSe:Mn/ZnS NANOPHOSPHORS WITH VERY HIGH QUANTUM EFFICIENCY FOR WHITE LEDs
Efficient white LEDs are rapidly taking over many lighting and display applications, because of their improved color rendering and low power requirements. They are attractive replacements for traditional lighting from the point of view of both human perception and energy efficiency. Currently, the …
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SOLID-SUPPORTED PORPHYRINS FOR CATALYSIS AND SENSING
… for a residence time of 30 minutes and recycled 5 consecutive times. The corresponding cyclopropane was obtained in 15% yield and 74:26 trans/cis selectivity. These results must be considered very preliminary and reaction conditions will be optimized in order to maximize yields and …