Search for dissertations about: "three level"

Showing result 1 - 5 of 3328 swedish dissertations containing the words three level.

  1. 1. Grid Connected Three-Level Converters : Studies for Wave Energy Conversion

    Author : Remya Krishna; Mats Leijon; Karin Thorburn; Uppsala universitet; []
    Keywords : Wave energy; power converters; control strategies; grid connection; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics;

    Abstract : This thesis presents an electrical system analysis of a wave energy converter (WEC) for the objective of grid connection. To transfer the enormous amount of power from waves to the load centers, efficient power electronic systems are essential. READ MORE

  2. 2. Career outcomes in the Swedish labor market : three contextual studies

    Author : Magnus Bygren; David Grusky; Stockholms universitet; []
    Keywords : SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Career development; Labour market; Sweden; Karriär; Arbetsmarknad; Sverige; 1990-talet;

    Abstract : Paper I:Being Different in the Workplace: Job Mobility into other Workplaces and Shifts into Unemployment. This study evaluates contradictory theoretical predictions about the consequences of belonging to a minority in a workplace context. READ MORE

  3. 3. Learning Chemistry at the University level : Student attitudes, motivation, and design of the learning environment

    Author : C. Anders R. Berg; Johan Lithner; Lisbeth Lundahl; Helge Strömdahl; Umeå universitet; []
    Keywords : laboratory work; open experiments; attitude; university level; motivation; cognitive load; laboratory instruction styles; attitude change; design of learning situation; student questions.;

    Abstract : The main purpose of the research this thesis is based upon was to study students’ attitudes towards learning chemistry at university level and their motivation from three perspectives. How can students’ attitudes towards learning chemistry be assessed? How can these attitudes be changed? How are learning situations experienced by students with different attitude positions? An attitude questionnaire, assessing views of knowledge, learning assessments, laboratory activities, and perceived roles of instructors and student, was used to estimate students’ attitude positions. READ MORE

  4. 4. Monolith Reactors in Three-Phase Processes

    Author : Rolf Edvinsson; Chalmers University of Technology; []
    Keywords : desulfurization; methanol synthesis; acetylene hydrogenation; Taylor flow; monolith reactor; three-phase; computational fluid dynamics;

    Abstract : The use of monoliths in chemical processes has been studied with the emphasis on liquid-phase hydrogenations. A monolithic catalyst consists of many narrow, parallel channels with catalytically active species either incorporated into the wall itself or into a layer of a porous oxide deposited on the wall (a washcoat). READ MORE

  5. 5. Architecture-Level Modifiability Analysis

    Author : PerOlof Bengtsson; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Cost, quality and lead-time are three main concerns in software engineering projects. The quality of developed software has traditionally been evaluated on completed systems. Evaluating the product quality at completion introduces a great risk of wasting effort on software products with inadequate system qualities. READ MORE