Search for dissertations about: "Jesper Pettersson"

Found 5 swedish dissertations containing the words Jesper Pettersson.

2. 1. Alkali Induced Corrosion of 304L, The Influence of Potassium Salts and Water Vapour

   Author : Jesper Pettersson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; 304L; Alkali; Breakaway Corrosion; KCl; Oxidation; Deposit;

   Abstract : This work investigates the influence of alkali salts on the oxidation of304-type (Fe18Cr10Ni) austenitic stainless steel in laboratory and fieldexposures. Stainless steel coupons were exposed isothermally inlaboratory furnaces at 400-600 °C in 5% O2 and 5% O2 + 40% H2O.Thermobalance exposures were also performed. READ MORE

4. 2. Alkali Induced High Temperature Corrosion of Stainless Steel - Experiences from Laboratory and Field

   Author : Jesper Pettersson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; KCl; 304L; Biomass; Corrosion; Chlorine; Chromate; Waste; Deposit;

   Abstract : The high temperature corrosion of steam superheaters is a major obstacle that has to be overcome in order to increase the electricity generating efficiency of power boilers burning biomass or waste. This thesis addresses this issue by a combination of well-controlled model experiments in the laboratory and short and long term field exposures using cooled probes in full-scale biomass and waste fired boilers. READ MORE

5. 3. Towards a Mobile Learning Software Ecosystem

   Author : Oskar Pettersson; Marcelo Milrad; Jesper Andersson; Richard Torkar; Linnéuniversitetet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Technology-Enhanced Learning; Mobile Learning; Software Reuse; Software Ecosystem; Domain analysis; Media Technology; Medieteknik;

   Abstract : The ability to carry communication services around, combined with the ubiquitous presence of computing technology, affects everything we do from how we pay for things to how we expect to interact with public institutions such as schools. There are now plenty of systems that convey education by utilizing mobile devices. READ MORE

6. 4. Mathematical Reasoning in Physics Tests : Requirements, Relations, Dependence

   Author : Helena Johansson; Mats Andersson; Jesper Boesen; Kerstin Pettersson; Göteborgs universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Mathematical reasoning; imitative reasoning; creative mathematical reasoning; physics tests; physics tasks; upper secondary school; Mantel-Haenszel procedure; Mathematical reasoning; imitative reasoning; creative mathematical reasoning; physics tests; physics tasks; upper secondary school; Mantel-Haenszel procedure.; Mantel-Haenszel procedure;

   Abstract : By analysing and expanding upon mathematical reasoning requirements in physics tests, this licentiate thesis aims to contribute to the research studying how students’ knowledge in mathematics influence their learning of physics. A sample of physics tests from the Swedish National Test Bank in Physics was used as data, together with information of upper secondary students’ scores and grades on the tests. READ MORE

7. 5. Three Empirical Studies on Development : Democracy, the Resource Curse and Aid

   Author : Jan Pettersson; Fabrizio Zilibotti; Ragnar Torvik; Stockholms universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Democracy; Economic Growth; Consolidation; Political Systems; Natural Resources; Appropriability; Property Rights; Institutions; Development; Foreign Aid; Fungibility; Poverty; Public Expenditure; Economics; Nationalekonomi;

   Abstract : This thesis presents three self-contained essays focusing on empirical questions in growth and development economics. Each article addresses specific questions on why countries perform differently. READ MORE