Search for dissertations about: "heading"
Showing result 1 - 5 of 42 swedish dissertations containing the word heading.
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1. Bird orientation: external cues and ecological factors
Abstract : 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. READ MORE
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2. Where are the world’s disease patterns heading? : The challenges of epidemiological transition
Abstract : INTRODUCTION: Epidemiological transition theory, first postulated by Omran in 1971, provides a useful framework for understanding cause-specific mortality changes and may contribute usefully to predictions about cause-specific mortality. However, understandings of mortality transitions and associated epidemiological changes remain poorly defined for public health practitioners due to lack of evidence from low- and middle-income countries. READ MORE
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3. Autonomous Localization in Unknown Environments
Abstract : Over the last 20 years, navigation has almost become synonymous with satellite positioning, e.g. the Global Positioning System (GPS). On land, sea or in the air, on the road or in a city, knowing ones position is a question of getting a clear line of sight to enough satellites. READ MORE
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4. A Model of Driver Perception and Action in Intersections
Abstract : The objective of the research presented in this thesis is to describe driver behavior while approaching, entering and exiting an intersection. To fulfill this objective, two semi-naturalistic studies were conducted where ten driver participants drove a test vehicle through a three-way intersection repeatedly, driving straight, turning left, and turning right in a total of six possible passes. READ MORE
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5. Keep it rolling : Straight-line orientation in South African ball-rolling dung beetles
Abstract : Representing a substantial range and variety in morphological and ecological niche, found on all continents of the globe (except for the Antarctic), the ball-rolling dung beetles provide an excellent model in which to study the heading direction network and the factors by which it is influenced. As soon as a ball-rolling dung beetle has located a fresh dung pile to feed on, it immediately starts shaping a piece of dung into a ball, rolling it away from the dung pat in as straight of a trajectory as the terrain allows. READ MORE