Essays about: "Jan Persson"
Found 3 essays containing the words Jan Persson.
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1. Studies of the PMWE : Polar Mesosphere Winter Echoes
University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknikAbstract : This Master thesis examines a phenomenon that occurs in the upper polar atmosphere, namely, Polar Mesospheric Winter Echoes, or PMWEs. PMWEs are radar echoes observed by Very High Frequency Mesosphere Stratosphere Troposphere (VHF MST) radar, from altitudes of 60 to 76 km at 7 to 15 UT, in the winter months from the middle of September to the beginning of May. READ MORE
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2. Regions as Security Providers: The Evolution of the West African Regional Security Complex
University essay from Lunds universitet/Statsvetenskapliga institutionenAbstract : The purpose of this thesis is to explore the region in its role as a regional security provider through a within-case study of West Africa. The point of departure is on one hand that contemporary threats to international peace and security are increasingly regional, arising within states rather than from a global or out-of-region origin, and on the other hand that the regions among the world has become salient security providers. READ MORE
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3. Stabilizing a missile radar antenna Using Axiomatic Design
University essay from KTH/Maskinkonstruktion (Inst.)Abstract : This thesis work describes a brand new concept of how to, from a mechanical perspective, stabilize/mount a radar antenna. The antenna must be able to rotate ±60 degrees around pitch and yaw without disturbing the radar characteristics. At the same time the antenna diameter must be as large as possible to enhance radar quality. READ MORE
