Search for dissertations about: "blue led"
Showing result 1 - 5 of 39 swedish dissertations containing the words blue led.
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1. Carrier dynamics in blue and green InGaN LED structures
Abstract : This thesis focuses on effects that are critical to achieving high internal quantum efficiency (IQE) in GaN-based light-emitting diodes (LEDs) that emit in a broad spectral range, from violet to green-yellow. These effects include interwell carrier transport in multiple quantum well (QW) structures, lateral transport in the QW plane, and radiative and nonradiative recombination. READ MORE
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2. Costs in the ecology and evolution of the vertebrate immune system
Abstract : A central assumption of theories of the ecology and evolution of immunological defence is that defence has not only benefits (in the form of resistance against parasites), but also costs. The aim of my studies was to investigate the nature and magnitude of costs of the vertebrate immune system, and to examine some of the consequences of these costs. READ MORE
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3. Computer-aided optimization of complex processes in production systems and urban environments
Abstract : Complex processes can be seen as a series of actions, changes, and/or events that are related in different temporospatial manners, and thus are potentially difficult to understand. Optimizing such a process is therefore not necessarily a simple feat, and doing it experimentally may become both time-consuming and expensive. READ MORE
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4. Large-Scale Land Acquisitions as a Driver of Socio-Environmental Change : From the Pixel to the Globe
Abstract : A major challenge of our time is to sustainably produce food and other goods for a growing global population, without putting additional pressures on land and water resources and local people’s quality of life. Large-scale agriculture has brought many benefits to humanity in terms of food production but has also caused multiple sustainability challenges, including land and water degradation, deforestation, and biodiversity loss in areas of production. READ MORE
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5. Between the devil and the deep blue sea: Trade negotiations between the Western Allies and the Scandinavian neutrals, 1914-1919
Abstract : This thesis analyses the interplay between Western Allied policymakers and the governments of Denmark, Norway and Sweden during the Great War. It explores to what extent Allied economic warfare authorities were able to dictate terms to their Scandinavian counterparts on matters of trade policy between, and examines whether there is such a thing as a “Scandinavian experience” of the Allied blockade of Germany. READ MORE
