Sökning: "Relative orientation"

Visar resultat 1 - 5 av 134 avhandlingar innehållade orden Relative orientation.

1. 1. Magnetic orientation in migratory birds

   Författare :Rachel Muheim; Funktionell zoologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Animal ecology; Djurekologi; cue-conflict; clock-shift; cue calibration; geomagnetic field; high Arctic latitudes; Emlen funnel; magnetic compass; magnetoreception; navigation; migration; bird; orientation;

   Sammanfattning : My thesis focuses on magnetic orientation in migratory birds, i.e. how they can perceive information from the Earth’s magnetic field and use it for orientation. LÄS MER

3. 2. Keep it rolling : Straight-line orientation in South African ball-rolling dung beetles

   Författare :Lana Khaldy; Funktionell zoologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ball-rolling dung beetle; Orientation; Heading direction network; Compass; Weighting; Celestial cues; Sun; Polarised light;

   Sammanfattning : 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. LÄS MER

4. 3. Value Orientation, Awareness of Consequences, and environmental Concern

   Författare :André Hansla; Göteborgs universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Value orientation; awareness of environmental consequences; environmental concern; green electricity;

   Sammanfattning : The tenets of the value-basis approach to environmental concern are (i) that environmental concern is motivated by beliefs about adverse egoistic (e.g. own health), social-altruistic (e.g. LÄS MER

5. 4. Photocatalytic TiO2 thin films for air cleaning : Effect of facet orientation, chemical functionalization, and reaction conditions

   Författare :Bozhidar Stefanov; Lars Österlund; Gunnar Niklasson; Claes-Göran Granqvist; Peter Christian Kjærgaard Vesborg; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; titanium dioxide; photocatalysis; thin films; surface functionallization; acetaldehyde; indoor air cleaning; sputter deposition; crystallographic modifications; preferential orientation; self-cleaning surfaces; Teknisk fysik med inriktning mot fasta tillståndets fysik; Engineering Science with specialization in Solid State Physics;

   Sammanfattning : Poor indoor air quality is a source of adverse health effects. TiO2 coatings deposited on well-illuminated surfaces, such as window panes, can be used to fully mineralize indoor air pollutants by photocatalysis. LÄS MER

7. 5. There and Back Again - nocturnal migratory behaviour of birds during spring and autumn

   Författare :Håkan Karlsson; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; migration; seasons; flight; orientation; navigation; behaviour; strategies; birds; nocturnal;

   Sammanfattning : This dissertation explores the migratory behaviour of nocturnally migrating passerines and common swifts (Apus apus). Birds passing Lund (southern Sweden) and Abisko (northernmost Scandinavia) where sampled using tracking radar. The aim has been to investigate potential diverging strategies between spring and autumn migration. LÄS MER