Sökning: "Initiation position"
Visar resultat 1 - 5 av 48 avhandlingar innehållade orden Initiation position.
1. Characterizations of ground flashes from tropic to northern region
Sammanfattning : This thesis portrays new information concerning the cloud-to-ground (CG) lightning flashes or ground flashes produced by thunderclouds. It emphasizes the importance of characterizing lightning studies as the relationship between lightning mechanisms, and of incorporating the influence of geographical location, latitude and storm type. LÄS MER
2. Rolling Contact Fatigue of Railway Rails with Emphasis on Crack Initiation
Sammanfattning : Increased traffic density and the heavier axle loads of modern trains have led to severe problems with rolling contact fatigue (RCF) which cause initiation of surface cracks in railheads. In this thesis, a specific type of surface crack, the head check, is studied numerically with emphasis on fatigue crack initiation. LÄS MER
3. Gas Metal Arc Melt Pool Modelling : Effect of welding position and electromagnetic force mode
Sammanfattning : Gas metal arc is a high-efficiency and widely used heat source for metal processing applied predominantly in welding and additive manufacturing. In this study, it was applied to welding. LÄS MER
4. Socially structured health behaviors : Studies of social inequality in adolescent and young adult physical activity, alcohol consumption, and smoking in Sweden
Sammanfattning : Health behaviors contribute to the Swedish national disease burden and to social inequalities in health. This thesis aims to increase our knowledge of whether, when, and how health behaviors become socially structured during early life in Sweden. LÄS MER
5. Rational and combinatorial genetic engineering approaches for improved recombinant protein production and purification
Sammanfattning : The bacterium Escherichia coli (E. coli) is in many situations an ideal host for production of recombinant proteins, since it generally provides a rapid and economical means to achieve sufficiently high product quantities. LÄS MER