Search for dissertations about: "ultraviolet light"
Showing result 1 - 5 of 144 swedish dissertations containing the words ultraviolet light.
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1. Thin-film ultraviolet light-emitting diodes realized by electrochemical etching of AlGaN
Abstract : Ultraviolet (UV) light sources have a direct impact on everyone’s life. They are used to sterilize surfaces as well as for water purification. In addition, they are used in green houses to enhance health-promoting substances in plants, for phototherapy to treat skin diseases, for sensing and material curing. READ MORE
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2. Control of Coherent Extreme Ultraviolet Light and Light Sources
Abstract : Coherent extreme ultraviolet (XUV) light sources are necessary for the investigation of physical processes in the natural length and time scales of atoms. These experiments require a high degree of control of the coherent XUV light. READ MORE
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3. Year-round production of forest seedlings under LED lamps : Biological and energetic implications of indoor cultivation
Abstract : Year-round cultivation of forest seedlings under light emitting diodes (LED) is a technology receiving increased attention from nurseries in the boreal forest regions. In these areas, the climate is characterized by strong seasonal fluctuations, resulting in short vegetation periods with narrow time windows for seedling transplanting and outdoor growth. READ MORE
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4. Towards Novel AlGaN-Based Light Emitters
Abstract : The unique properties of the AlGaN semiconductors make them a suitable choice for optoelectronic devices at both short and long wavelengths, based on interband and intersubband transitions, respectively. What sets AlGaN apart from other wide-bandgap semiconductors is the possibility to obtain both p- and n-type conductivity as well as the direct bandgap. READ MORE
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5. Ultraviolet radiation cataract
Abstract : Cataract is the leading cause of blindness in the world. Epidemiological and experimental evidence supports a link between mid-range ultraviolet radiation (UVR-B) exposure and the development of cataract. READ MORE