Search for dissertations about: "Per Jönsson"
Showing result 6 - 10 of 30 swedish dissertations containing the words Per Jönsson.
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6. Dynamic Vehicle-Track Interaction of European Standard Freight Wagons with Link Suspension
Abstract : The link suspension is the most prevailing suspension system for freight wagons in Central and Western Europe. The system design is simple and has existed for more than 100 years. However, still its characteristics are not fully understood. READ MORE
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7. The Activity Diamond - Modeling an Enhanced Accessibility
Abstract : The purpose of the research presented in this thesis is to enhance the field of accessibility to include a multitude of perspectives. Based on cultural-historical activity theory (CHAT), it analyzes how human, artifactual and natural factors impact an individual’s possibilities to act in concrete situations that are part of a systemic whole. READ MORE
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8. Behavioural Medicine Perspectives for Change and Prediction of Oral Hygiene Behaviour : Development and Evaluation of an Individually Tailored Oral Health Educational Program
Abstract : This thesis is about a behavioural medicine approach in periodontal treatment and oral hygiene self-care. The aim of this thesis was to develop, describe, and evaluate an individually tailored oral health educational program on oral hygiene behaviour and non-surgical periodontal treatment success, and to determine factors of importance for predicting oral hygiene behaviour. READ MORE
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9. Phase transformation and surface chemistry of secondary iron minerals formed from acid mine drainage
Abstract : The mining of sulphidic ore to extract metals such as zinc and copper produces huge quantities of waste material. The weathering and oxidation of the waste produces what is commonly known as Acid Mine Drainage (AMD), a dilute sulphuric acid rich in Fe(II) and heavy metals. READ MORE
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10. On Heavy-Haul Wheel Damages using Vehicle Dynamics Simulation
Abstract : Maintenance cost is one of the important issues in railway heavy-haul operations. In most of the cases, these costs are majorly referring to reprofiling and changing the wheels of the locomotives and the wagons. The main reason of the wheel damages is usually severe wear and/or surface initiated rolling contact fatigue (RCF). READ MORE