Sökning: "Johan Bäckman"

Hittade 3 avhandlingar innehållade orden Johan Bäckman.

1. 1. Bird orientation: external cues and ecological factors

   Författare :Johan Bäckman; Evolutionär ekologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; tracking radar; Emlen funnel.; Animal ecology; Djurekologi; oscillatory orientation; roosting flight; scatter; concentration; heading; cue calibration; light dependent; magnetoreception; subcutaneous fat stores; body condition; energetics; geomagnetic field; visual cues; orientation; birds; migration;

   Sammanfattning : Birds are generally capable of accurate orientation. In this thesis I present studies about the external cues and the ecological factors that influences bird orientation. A multitude of environmental cues are used to select and maintain a proper direction. LÄS MER

3. 2. Railway, safety and economics

   Författare :Johan Bäckman; KTH; []
   Nyckelord :;

   Sammanfattning : .... LÄS MER

4. 3. Railway Safety - Risks and Economics

   Författare :Johan Bäckman; KTH; []
   Nyckelord :Railway safety; Risk analysis; Statistical analysis; CBA; Economics; Willingness To Pay; Risk criteria;

   Sammanfattning : Safety analysis is a process involving several techniques.The purpose of this thesis is to test and develop methodssuitable for the safety analysis of railway risks and railwaysafety measures. Safety analysis is a process comprisingproblem identification, risk estimation, valuation of safetyand economic analysis. LÄS MER