Search for dissertations about: "Hans Ekström"
Found 4 swedish dissertations containing the words Hans Ekström.
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1. Antenna Integrated Superconducting Mixers
Abstract : This thesis investigates the prospects of some different superconducting mixers integrated with planar antennas for the millimeter and submillimeter regime. Two kinds of Superconductor/Insulator/Superconductor (SIS) tunnel junctions for use in mixers have been fabricated; Nb/PbBi edge junctions and Nb trilayer junctions. READ MORE
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2. Transition Metal Hydrides : Biomimetic Studies and Catalytic Applications
Abstract : In this thesis, studies of the nature of different transition metal-hydride complexes are described. The first part deals with the enantioswitchable behaviour of rhodium complexes derived from amino acids, applied in asymmetric transfer hydrogenation of ketones. READ MORE
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3. The influence of biogenic organic compounds on cloud formation
Abstract : Aerosols and clouds provide the largest uncertainty in the atmospheric radiation budget. The main focus of this thesis was to investigate the ability of organic compounds in aerosol particles to form clouds, and more specifically those emitted by living organisms. READ MORE
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4. Divided Exhaust Period on Heavy-Duty Diesel Engines
Abstract : Due to growing concerns regarding global energy security and environmental sustainability it is becoming increasingly important to increase the energy efficiency of the transport sector. The internal combustion engine will probably continue to be the main propulsion system for road transportation for many years to come. READ MORE