Search for dissertations about: "Peter Fransson"

Showing result 1 - 5 of 8 swedish dissertations containing the words Peter Fransson.

2. 1. Functional Magnetic Resonance Imaging for Clinical Diagnosis : Exploring and Improving the Examination Chain

   Author : Mattias Ragnehed; Peter Lundberg; Maria Engström; Örjan Smedby; Peter Fransson; Linköpings universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiology; Radiologi;

   Abstract : Functional Magnetic Resonance Imaging (fMRI) is a relatively new imaging technique, first reported in 1992, which enables mapping of brain functions with high spatial resolution. Functionally active areas are distinguished by a small signal increase mediated by changes in local blood oxygenation in response to neural activity. READ MORE

4. 2. Analysis and development of strategies for magnetic resonance functional neuroimaging

   Author : Peter Fransson; Karolinska Institutet; Karolinska Institutet; []
   Keywords : neuroimaging; human brain; functional activation; magnetic resonance imaging; cerebral blood oxygenation;

   Abstract : This thesis focuses on strategies for oxygenation-sensitive MRI that are designed to measure alterations in brain physiology induced by changes in neuronal activity. In a first study, it was shown that the temporal evolution of BOLD MRI signal changes in response to both brief and sustained visual activation are equally well visible in FLASH and EPI recordings. READ MORE

5. 3. Optimal thinning : a theoretical investigation on individual-tree level

   Author : Peter Fransson; Åke Brännström; Ola Lindroos; Oskar Franklin; Per Lundberg; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Forest management; Simulation; Optimization; Spatially explicit model; Individual-based model;

   Abstract : Paper I: In paper I, we asked how a tree should optimally allocate its resources to maximize its fitness. We let a subject tree grow in an environment shaded by nearby competing trees. The competitors were assumed to have reached maturity and had stopped growing, thus creating a static light environment for the subject tree to grow in. READ MORE

6. 4. Towards Individualized Drug Dosage : General Methods and Case Studies

   Author : Martin Fransson; Peter Fritzson; Lena Friberg; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; drug dosage; population pharmacokinetics; biochemical modelling; identifiability; parameter estimation; Bioinformatics; Bioinformatik;

   Abstract : Progress in individualized drug treatment is of increasing importance, promising to avoid much human suffering and reducing medical treatment costs for society. The strategy is to maximize the therapeutic effects and minimize the negative side effects of a drug on individual or group basis. READ MORE

7. 5. Elastic and inelastic scattering effects in conductance measurements at the nanoscale : A theoretical treatise

   Author : Peter Berggren; Jonas Fransson; Wolfgang Belzig; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Scattering theory; Scanning tunneling microscopy; tunnel junctions; molecular graphene; paramagnetic molecules; spin interaction; nano electromechanical system; Josephson junction; superconductivity; chaos; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

   Abstract : Elastic and inelastic interactions are studied in tunnel junctions of a superconducting nanoelectromechanical setup and in response to resent experimental superconducting scanning tunneling microscope findings on a paramagnetic molecule. In addition, the electron density of molecular graphene is modeled by a scattering theory approach in very good agreement with experiment. READ MORE