Search for dissertations about: "J2"

Showing result 1 - 5 of 8 swedish dissertations containing the word J2.

  2. 1. Essays on School Resources, Academic Achievement and Student Employment

    Author : Iida Häkkinen; Per-Anders Edin; Roope Uusitalo; Stephen Machin; Uppsala universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; I2; J2; J3; Nationalekonomi; Economics; Nationalekonomi; nationalekonomi; Economics;

    Abstract : Essay 1 (with Tanja Kirjavainen and Roope Uusitalo) analyzes the effects of changes in school spending on changes in student performance. We use a large sample of matriculation examination scores of Finnish senior secondary school students from the years 1990–1998. READ MORE

  4. 2. Simulation of dynamic instabilities during high rate deformation of ductile bars and plates

    Author : Kristina Nilsson; Mekanik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; numerical simulation; non-linear; wave propagation; multiple necking; necking; buckling; fracture; Mechanical engineering; Maskinteknik; finite elements; cohesive elements; dynamic; J2-flow theory; J2-deformation theory; viscoplastic; background inertia;

    Abstract : In this thesis, some of the phenomena occurring in plates and cylindrical bars subjected to dynamic loading are investigated. Numerical simulations using a dynamic finite element code are performed for a number of different sized specimens with various initial surface imperfections. Typically imposed loading velocities are in the range 10m/s.. READ MORE

  5. 3. Optimization of Castings by using Surrogate Models

    Author : Erik Gustafsson; Niclas Strömberg; Bo Torstenfelt; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Response Surface Methodology RSM ; Residual Stresses; Castings; Engineering mechanics; Teknisk mekanik;

    Abstract : In this thesis structural optimization of castings and thermomechanical analysis of castings are studied.In paper I an optimization algorithm is created by using Matlab. The algorithm is linked to the commercial FE solver Abaqus by using Python script. READ MORE

  6. 4. Fermentation of barley flour with Lactobacillus reuteri : a source of bioactive compounds against a leaky gut?

    Author : Anton Pallin; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Fermentation of foodstuffs has beneficial effects on shelf life, taste and texture and possibly also health of the consumer. Products containing microbes with beneficial health effects for the host are defined as probiotics. READ MORE

  7. 5. Exploring probiotics-host interactions : intestinal immune and defence responses to Lactobacillus reuteri in health and disease

    Author : Shokoufeh Karimi; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Lactobacillus reuteri, a ubiquitous inhabitant of the mammalian gastrointestinal (GI) tract has known health-promoting effects and various strains are commercially available as probiotics. Several probiosis mechanisms have been suggested in L. reuteri’s mode of action, but the mediators and factors involved are not well understood. READ MORE