Sökning: "johansson 2007"
Visar resultat 21 - 25 av 127 avhandlingar innehållade orden johansson 2007.
21. Obtaining Accurate and Comprehensible Data Mining Models : An Evolutionary Approach
Sammanfattning : When performing predictive data mining, the use of ensembles is claimed to virtually guarantee increased accuracy compared to the use of single models. Unfortunately, the problem of how to maximize ensemble accuracy is far from solved. LÄS MER
22. Detecting Deletions by Analysis of Genetic Markers in Pedigrees
Sammanfattning : A deletion is defined as a missing piece of a chromosome, ranging in size from as small as a single base pair to as much as an entire arm of a chromosome. Deletions can cause diseases, but may also have a neutral effect in the genome. LÄS MER
23. Spectroscopic techniques for photodynamic therapy dosimetry
Sammanfattning : Photodynamic therapy (PDT) as a cancer treatment modality relies on the simultaneous presence of three components; light, photosensitiser and oxygen. Once excited by the light, the photosensitiser can interact with oxygen, leading to the formation of toxic oxygen species. LÄS MER
24. Simulations of water clustering in vapour, hydrocarbons and polymers
Sammanfattning : It is commonly known that water plays a crucial role in many natural and industrial processes. One of these processes is the formation of water trees, and the subsequent breakdown of polyethylene used for high voltage cable insulation purposes. LÄS MER
25. The illness flexibility model and sickness absence
Sammanfattning : Research on sickness absence has repeatedly been described as theoretically undeveloped. In this thesis the model of illness flexibility is introduced. In this model, sickness absence is assumed to be caused by people’s ability and motivation to work. Ability and motivation will in turn be affected by conditions met in and outside work. LÄS MER