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Visar resultat 1 - 5 av 27 avhandlingar som matchar ovanstående sökkriterier.
1. Flight strategies in migrating birds: when and how to fly
Sammanfattning : Wind has a profound influence on migrating birds since it inevitably will influence travel time and energy expenditure. In this thesis I investigate how migrating birds are affected by, and use winds. LÄS MER
2. Green Propellants
Sammanfattning : To enable future environmentally friendly access to space by means of solid rocket propulsion a viable replacement to the hazardous ammonium perchlorate oxidizer is needed. Ammonium dinitramide (ADN) is one of few such compounds currently known. LÄS MER
3. Extraction and Energy Efficient Processing of Streaming Data
Sammanfattning : The interest in machine learning algorithms is increasing, in parallel with the advancements in hardware and software required to mine large-scale datasets. Machine learning algorithms account for a significant amount of energy consumed in data centers, which impacts the global energy consumption. LÄS MER
4. Development of collaborative green lean production systems
Sammanfattning : This thesis deals with development of lean and green production systems from an action research point of view. The studies focus on Swedish-based automotive and vehicle industries and their aims to integrate sustainable thinking and environmental care into their operations management. LÄS MER
5. First principles methods for electronic structure calculations of solids
Sammanfattning : A straightforward gradient expansion of the exchange energy of a perturbed electron gas is performed. Studied perturbations range from very weak to those that produce, e.g., a silicon-like band structure with a band gap. LÄS MER