Sökning: "Threshold effect"

Visar resultat 1 - 5 av 305 avhandlingar innehållade orden Threshold effect.

1. 1. The mechanics in two nanosized systems : Size effect and threshold field

   Författare :Martin Olsen; Håkan Olin; Ulf Lindefelt; Sven Öberg; Mittuniversitetet; []
   Nyckelord :;

   Sammanfattning : This thesis investigates the mechanics in two nanosized system. Paper I investigates a size effect in a cantilever nanowire affecting its resonance frequency. Paper II reveals a threshold field for the formation of a mound by the diffusion of surface atoms on a substrate under a STM-tip. LÄS MER

3. 2. Offshore wind farms - ecological effects of noise and habitat alteration on fish

   Författare :Mathias H. Andersson; Sören Nylin; Magnus Wahlberg; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; renewable energy; fish population; artificial reef; attraction vs. production; habitat structure; reef effect; FAD; bioacoustics; noise disturbance; fish behaviour; detection range; threshold; masking; fish communication and hearing; Marine ecology; Marin ekologi; zoologisk ekologi; Animal Ecology;

   Sammanfattning : There are large gaps in our understanding how fish populations are affected by the anthropogenic noise and the alteration of habitat caused by the construction and operation of offshore wind farms. These issues are of great importance as the construction of offshore wind farms will increase all over the world in the near future. LÄS MER

4. 3. Constraint-based modeling of metabolism - interpreting predictions of growth and ATP synthesis in human and yeast

   Författare :Avlant Nilsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; the Crabtree effect; enzyme-constraints; stunting; cellular economy; the Warburg effect; uncoupling; tumor; flux balance analysis; lactate threshold; metabolite depletion;

   Sammanfattning : Growth is the primary objective of the cell. Diseases arise when cells diverge from a healthy growth-pattern. An increased understanding of cellular growth may thus be translated into improved human health. The cell requires materials and free energy (in the form of ATP) in order to grow, metabolism supplies the cell with this. LÄS MER

5. 4. Incentives in Education and Moral Behavior in Groups

   Författare :Pol Campos-Mercade; Nationalekonomiska institutionen; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Field experiment; Academic performance; Threshold incentives; Lab experiment; Moral action; Group size; Bystander effect; Volunteer s dilemma; Social preferences;

   Sammanfattning : This thesis uses field experiments, lab experiments, and theory to study questions that are relevant to the fields of education and behavioral economics.The first paper, Threshold Incentives and Academic Performance, begins with the observation that students often face incentives to reach performance thresholds. LÄS MER

7. 5. The long-term decline of the grey-sided vole (Clethrionomys rufocanus) in boreal Sweden: importance of focal forest patch and matrix

   Författare :Pernilla Christensen; Birger Hörnfeldt; Rolf A. Ims; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; : Destructive sampling; high quality habitat; focal habitat; landscape; habitat fragmentation; threshold; clear-cut; patch size and quality; long-term time-series; Terrestrial ecology; Terrestisk ekologi;

   Sammanfattning : There has been a long-term decline in number of cyclic vole populations in boreal Sweden since the 1970s. Several hypotheses have been suggested to explain this decline. Commonly for C. glareolus, C. LÄS MER