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 20 of 480 for “"Sunlight"”.
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Absorption of sunlight by atmospheric sodium
… the effect of stray light to be eliminated. With sunlight the radiation detected is at the bottom of the Fraunhofer lines and the residual intensity there may be measured. It is found that this intensity decreases slightly (relative to the continuum) as the sun approaches the horizon. This effect …
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Persistence of Bacteroides ovatus under simulated sunlight irradiation
… bacteria species, was evaluated under simulated sunlight exposure and conditions similar to surface water and seawater. By combining propidium monoazide (PMA) treatment and quantitative polymerase chain reaction (qPCR) detection, the decay rates of B. ovatus were determined in the presence of …
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Komorebi : embedding dappled sunlight in the built environment
… is a Japanese term that describes the dappled sunlight filtered through tree foliage. Through analysis of this visual effect and experimenting with various materials and actuators, a daylight-filtering system is developed to bring the dappled light phenomenon into the built environment. …
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Green Photochemistry: The synthesis of fine chemicals with sunlight
… solar irradiation was demonstrated in Irish sunlight conditions at Dublin City University. Use of concentrated sunlight was investigated in collaboration with the German Aerospace Centre (DLR), Cologne. In all cases, solar irradiation gave yields greater than those obtained under artificial …
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Nature and the Victorian entrepreneur : soap, sunlight and subjectivity
… personal philosophies, his legacy including Port Sunlight village, the Leverhulme Trust and the product for which he is best known, namely Sunlight Soap, are examined to reveal the extent to which his understanding of Nature impacted on his thought. What he expressed in his philosophy as his …
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HIGHLY-CONCENTRATED SUNLIGHT SEPARATION FOR WIDE-SPECTRUM SOLAR ENERGY HARVESTING
… optical components, which separates incoming sunlight into highly concentrated VIS (1238x) and IR (1372x) energy bands. Following separation of VIS and IR onto corresponding solar receivers, the DOS widens the sun’s spectrum usage, by allowing effective PV conversion of c-Si cells and …
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Sunlight and the use of holographic diffraction grating : an environmental perspective
The movement of sunlight within a building establishes a temporal relation to the spatial structure. Early civilizations aligned buildings with the sun to designate specific calendar days. Gothic and Renaissance cathedrals employed the transient movement of sunlight to activate the interiors with …
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Sunlight readability and luminance characteristics of light-emitting diode push button switches.
… luminance and power consumption at full voltage, sunlight readable contrast, luminance contrast under ambient sunlight, legend uniformity, and dual-color uniformity. Three of the four manufacturers have not developed LED push button switches that meet lighting quality standards established with …
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Novel Iridium (III) complexes for photocatalytic H2 generation from H2O using sunlight
The design and synthesis of economically viable homogeneous and heterogeneous transition metal complexes for photocatalytic hydrogen generation using visible light irradiation and as OLED’s are under intense investigation. Transition metal complexes are drawing great interest as they offer highly …
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Exploring possibilities to enhance silicon solar cell efficiency by downconversion of sunlight.
Improving the efficiency of solar cells is an active area of research in photovoltaic industry. The research work presented in this dissertation is based on a quest for better and improved silicon solar cells. The current work aims to explore different possibilities by studying advance approaches …
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Natural Rhythms and Temporal Perception - Visualization of Sunlight Patterns with Energy Monitoring
… effect of the LED lighting was compared with the sunlight entering through the skylights using quantitative analysis methods and qualitative visual comparison tools including time lapse photos and videos. The research merges architectural design, lighting technology and BIPV to demonstrate a …
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The design and construction of a sunlight integrator of wide intensity range
… of this project was to design and construct a sunlight integrator which would have wide intensity range, reliability under normal operating conditions, and moderate cost. If the minimum sensitivity for the first filter is arbitrarily chosen as one-tenth the dark counting period, which is in …
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Quantifying the effects of sunlight on the fate of oil spilled at sea
Oil spilled at sea is transformed by sunlight-driven photochemical reactions. The transformed oil has different properties and behavior in the environment compared to the fresh oil, resulting in different fates and effects. My work in this thesis was to put numbers on these changes, with the goal …
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Inactivation kinetics and mechanisms of rotavirus: the roles of sunlight, temperature, and sensitizers
U of I Only Restriction Lifted for Item 50581 on 2016-09-22T20:59:25Z.
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Quantifying the effects of sunlight on the fate of oil spilled at sea
Oil spilled at sea is transformed by sunlight-driven photochemical reactions. The transformed oil has different properties and behavior in the environment compared to the fresh oil, resulting in different fates and effects. My work in this thesis was to put numbers on these changes, with the goal …
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The Impact of Sunlight Variation on Depressive Symptoms Following Treatment for Major Depressive Disorder
Introduction: Seasonal variation in sunlight has been implicated in the pathogenesis and maintenance of major depressive disorder (MDD), but has not yet been evaluated as a potential moderator of recovery. Given the high rate of recurrence following treatment for depression, there is a need to …
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Experimental investigations of using silica aerogel to harvest unconcetrated sunlight in a solar thermal receiver
Significant demand exists for solar thermal heat in the mid-temperature ranges (120 oC – 220 oC). Generating heat in this range requires expensive optics or vacuum systems in order to utilize the diluted solar energy flux reaching the earth’s surface. Current flat plate solar collectors have …
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Sunlight Active (CoTiO3) – Titania (TiO2) Catalyst with Effective Activity for Dye Degradation and H+ Evolution
In the presented work we display experimental evidence of the effective photocatalytic activity of (CoTiO3) – Titania (TiO2) for dye degradation and H+ evolution. We present analysis of the photo catalytic activity of the CoTiO3 that is 50-92 times effective than TiO2 under visible light to Acid …
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