Search for dissertations about: "cluster feed"
Showing result 1 - 5 of 17 swedish dissertations containing the words cluster feed.
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1. Modern numerical methods in electromagnetics applied to the design of reflector antennas and horn feeds
Abstract : .... READ MORE
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2. Silver Alumina Catalysts for Lean NOx Reduction - Influence of Preparation Methods and Type of Reductant, with Transient Kinetic Modelling
Abstract : The objective of this work was to compare three different preparation methods for silver alumina catalysts for lean NOx reduction. Characteristics such as catalytic activity with propene and n-octane as reductants, chemical state of the silver and silver dispersion were analyzed. READ MORE
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3. Digital Beamforming Focal Plane Arrays for Radio Astronomy and Space-Borne Passive Remote Sensing
Abstract : Dense Phased Array Feeds (PAFs) for reflector antennas have numerous advantages over traditional cluster feeds of horns in a one-horn-per-beam configuration, especially in RF-imaging applications which require multiple simultaneously formed and closely overlapping beams. However, the accurate analysis and design of such PAF systems represents a challenging problem, both from an EM-modeling and beamforming optimization point of view. READ MORE
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4. Understanding regional peace and security: A framework for analysis
Abstract : The aim of this thesis is to build an analytical framework for understanding regional peace and security. Building on important insights from other theoretical approaches and drawing from empirical data, the framework aims to problematize and understand: (a) how peace and security cluster at the regional level, (b) the components of each regional cluster, and (c) the linkages that exist between them. READ MORE
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5. Specification of unique neuronal sub-types by integration of positional and temporal cues
Abstract : The nervous system contains vast numbers of neuronal sub-types, generated at specific time points, in the proper location, and in proper numbers. One of the fundamental issues in neurobiology is to understand the molecular genetic mechanisms that underlie the generation of this daunting neuronal diversity. READ MORE