Sökning: "event structure"

Visar resultat 11 - 15 av 267 avhandlingar innehållade orden event structure.

1. 11. Factors Affecting Rates of Change in Soil Bacterial Communities

   Författare :Marie Pettersson; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; virology; mycology; Mikrobiologi; bakteriologi; virologi; mykologi; Plant ecology; Växtekologi; bacteriology; Microbiology; DGGE; PLFA; TdR-incorporation; function; structure; tolerance; adaptation; pH; soil bacterial community; temperature;

   Sammanfattning : The soil bacterial community is under the constant influence of its environment. Changing any of the factors affecting the bacterial community will induce a selection pressure which, with time, will change the community. In this work the effect of changing the temperature or pH on the soil bacterial community was studied. LÄS MER

3. 12. Breeding System Evolution and Pollination Success in the Wind-Pollinated Herb Plantago maritima

   Författare :Emil Nilsson; Jon Ågren; Pia Mutikainen; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Breeding system; mating system; gynodioecy; male sterility; reproductive output; self-compatibility; self-incompatibility; wind-pollination; founder event; genetic structure; Biologi; Biology; Biologi; ekologisk botanik; Ecological Botany;

   Sammanfattning : In this thesis, I examined variation in sex expression and mating patterns in the sexually polymorphic, wind-pollinated herb Plantago maritima. With a combination of field studies, greenhouse experiments, and genetic analyses, I (a) examined factors influencing sex ratio variation in gynodioecious plants (in which hermaphrodites and females coexist), (b) discovered variation in breeding system, (c) investigated density-dependence of seed production, and (d) documented genetic variation within and among populations close to the northern range margin in Europe. LÄS MER

4. 13. Risker och rum. Riskmiljöer och riskfaktorer för barn och ungas skadehändelser i hem- och boendemiljön

   Författare :Charlotta Thodelius; Chalmers tekniska högskola; []
   Nyckelord :HUMANIORA; HUMANITIES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; disability; opportunity structure; risk factor; risk environment; adolescent; injury event; children;

   Sammanfattning : This thesis addresses the concept of risk and the understanding of risks in relation to children’s and adolescents’ injury events in the residential setting. The thesis is based on three main studies, the first study evaluate the register data used in study III, the second study is a literature review and the third study is an empirical study based on register data from the healthcare sector. LÄS MER

5. 14. Discrete Event Simulation -present situation and future potential

   Författare :Björn Johansson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Discrete Event Simulation; Productivity development; Performance enhancement;

   Sammanfattning : This thesis focuses on Discrete Event Simulation as a time saver, applied to manufacturing industries in order to increase performance, productivity, and profitability throughout their conducted processes.The thesis provides a base for implementation and more effective use of Discrete Event Simulation in manufacturing systems by applying Discrete Event Simulation technology through an overall performance aspect. LÄS MER

7. 15. Aspects of QCD and the Photon Structure

   Författare :Christer Friberg; Teoretisk partikelfysik - Geonomgår omorganisation; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; High energy interactions; QCD; Photons; Monte Carlo Event Generator; Leptoquarks; Colour Connections; cosmic rays; Kosmisk strålning; högenergi; Fysicumarkivet A:2000:Friberg;

   Sammanfattning : In a single theoretical framework, real and virtual photon interactions are modeled for gamma-p and gamma-gamma collisions. The description covers aspects from the production of jets to total cross sections, where special emphasis is put on the range of uncertainty in the modeling of a resolved photon component. LÄS MER