This work presents a study of the electron plasma lines observed by the incoherent scatter radar EISCAT. The work is focusing on two parts. On one hand, the design of a plasma line experiment for the EISCAT system with an improved spatial resolution. On the other hand, the comparison of the plasma line data collected with the EISCAT radar with an improved model for the intensity and the Doppler ...

In spite of a number of mHealth (use of mobile computing for health care) studies targeting people with diabetes, there has not yet been any clear evidence of its effect. Due to obscurity regarding subjects’ engagement with each component of the provided technology, it is not clear which factors are important and why. Considering that behavior change is a path of improvement in self-management of ...

The drainage of meltwater beneath ice sheets exerts a fundamental control on ice flow variability, by regulating the lubrication of the ice-bed interface, and determining subglacial sediment shear strengths. This thesis investigates meltwater drainage of the Fennoscandian and Barents Sea ice sheets through the combined application of geomorphologically based reconstruction and modelling of subglacial ...

The endonucleases A from Aliivibrio salmonicida (VsEndA, cold-adapted) and Vibrio cholerae (VcEndA, warm-adapted) have been studied in this work. The goal was to compare these two systems, in order to find structural differences that could explain the mechanism of cold adaptation in the psychrophilic EndA. These two enzymes have previously been studied experimentally and the crystal structures have ...

The unique properties of antimicrobial peptides have attracted the attention of chemists since the 1970’s. This class of compounds provides additional tools in the treatment of infections and the work described in this thesis was therefore focused on the synthesis of short peptidomimetics on the basis of modified amino acids and evaluation of their antimicrobial activity. The compounds of choice ...

This thesis is concerned with synthetic aperture focusing of ultrasonic pulse-echo measurements, with application to multilayered media and cylindrical structures. The work is motivated by the need for accurate methods for non-destructive testing of pipelines, particularly water distribution pipelines. By improving the lateral resolution in ultrasonic measurements, the synthetic aperture algorithms ...

This dissertation presents theoretical studies mainly of natural and magnetic circular dichroism spectra. For magnetic circular dichroism, the importance of electron correlation effects, here included at the density-functional functional level of theory, and solvent effects are discussed, both being shown to have significant impact on the final spectra. In addition, a unified approach for calculating ...

<p>This doctoral thesis binds together four included papers in a thematical whole and is simultaneously an independent work proposing a platform facilitating epidemiological research. <p><i>Population-based prospective cohort studies</i> typically recruit a relatively large group of participants representative of a studied population and follow them over years or decades. This group of participants ...

With the aid of DFT methods, it is possible to get insights into the mechanistic details of homogeneous reactions, the substrate preferences and activities of catalysts. Computational methods can also help to identify the selectivity-determining factors that govern asymmetric reactions. In this thesis, DFT methods are applied in order to study the enantioselective addition of small molecules, such ...

The mesopause region can be considered a "boundary region" between the neutral atmosphere, where atmospheric constituents and momentum are transported mainly by winds and turbulent eddies, and the ionosphere, where the main transport mechanism is molecular diffusion. In the mesopause, complex interactions between dynamics and photochemistry occur, and we are far from a complete understanding of these ...