Sökning: "John Bergström"
Visar resultat 1 - 5 av 7 avhandlingar innehållade orden John Bergström.
1. Modeling and numerical simulation of hydro power flows
Sammanfattning : This work is about high precision numerical water flow simulations of hydro power related applications, and especially draft tube flows. Because of the accuracy requirements for these types of simulations (the efficiency of a hydro power turbine can be over 90%), the work has been devided into several steps; verification, validation and modeling. LÄS MER
2. Numerical simulations of hydro power flows
Sammanfattning : .... LÄS MER
3. Temporality and the Semantics of the Biblical Hebrew Verbal System
Sammanfattning : This dissertation investigates the semantic factors behind the temporal meanings of the Biblical Hebrew (BH) verbal forms. Four different forms are studied, viz. qotel, yiqtol-L, qatal, and yiqtol-S. LÄS MER
4. The Origin of the Genus Flavivirus and the Ecology of Tick-Borne Pathogens
Sammanfattning : The present thesis examines questions related to the temporal origin of the Flavivirus genus and the ecology of tick-borne pathogens. In the first study, we date the origin and divergence time of the Flavivirus genus. It has been argued that the first flaviviruses originated after the last glacial maximum. LÄS MER
5. Effects of inorganic nitrogen and organic carbon on pelagic food webs in boreal lakes
Sammanfattning : Anthropogenic activities are increasing inorganic nitrogen (N) loadings to lakes in the northern hemisphere. In many boreal lakes phytoplankton are N limited, wherefore enhanced N input may affect the productivity of pelagic food webs. LÄS MER