Blar i utgivelsesdato Doktorgradsavhandlinger (NTfak)
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Studies of ionospheric parameters by means of electron plasma lines observed by EISCAT
(Doctoral thesis; Doktorgradsavhandling, 19981218)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 ... 
Wave damping and momentum transfer. Manifestation of momentum transfer in case of ocean surface waves being damped by an elastic film or a viscous layer
(Doctoral thesis; Doktorgradsavhandling, 20010228)Virkninga av å ha et bølgedempende overflatemateriale i ei havoverflate er studert, med særlig vekt på betydninga av strålingstrykket (stresset) eller bølgetrykket fra et innfallende, udempet bølgefelt. Det er et teoretisk ... 
Interferometric and high timeresolution observations of naturally enhanced ionacoustic echoes at the EISCAT Svalbard radar: Software radar and incoherent scattering
(Doctoral thesis; Doktorgradsavhandling, 20030624)We know that the visible Aurora Borealis is structured on many different scales, down to a few tens of metres. By using the EISCAT radars on Svalbard as an interferometer, we have found structures in the radio echoes from ... 
Lowfrequency noise characterization of silicongermanium resistors and devices
(Doctoral thesis; Doktorgradsavhandling, 20040603)The main topic of this thesis is experimental lowfrequency electrical noise characterization of semiconductor devices. In particular, we concentrate on applications of the silicongermanium alloy (SiGe). Lowfrequency ... 
Angles as tool for grasping space. Teaching of angles based on students’ experiences with physical activities and body movement
(Doctoral thesis; Doktorgradsavhandling, 20070613)The thesis enlightens how the choice of context as well as the approach to mathematics is important in introducing the concepts of angles. The analyses indicate that students should not be introduced to measuring angles ... 
Optical properties of snow and sea ice field measurements, parameterization schemes and validation
(Doctoral thesis; Doktorgradsavhandling, 200712)Optiske Egenskaper av Snø og Sjøis: Felt målinger, Modellbeskrivelse og Validering av Modeller I dag hersker det liten tvil om at de raske temperatur endringene vi er vitne til er menneskeskapte. Temperaturen øker dobbelt ... 
Quality of service aware binding in open systems
(Doctoral thesis; Doktorgradsavhandling, 20080207)This thesis addresses negotiation of bindings in QoS aware open systems and in particular how to characterize possible contracts, requirements and capabilities of heterogeneous environments. Our approach is (1) to use ... 
Higherorder SCF response functions in a quasienergy formulation
(Doctoral thesis; Doktorgradsavhandling, 20080930)This thesis is concerned with computer modelling of molecules interacting with electromagnetic radiation (light, radio waves, etc.), static electric and magnetic fields (in the laboratory), as well as approximate treatments ... 
Bonding in lowcoordinate complexes : what, if anything, is special?
(Doctoral thesis; Doktorgradsavhandling, 20081014)To contribute to the fundamental picture of the electronic structure of lowcoordinate transition metal complexes, we have carried out a series of DFT studies on monoimido and nitrosyl complexes for different metal ions ... 
Timefrequency characterization of harmonizable random processes
(Doctoral thesis; Doktorgradsavhandling, 2009)In this thesis we study how to characterize nonstationary harmonizable random processes simultaneously in time and frequency. Unlike stationary random processes, harmonizable processes can have a frequency content that ... 
Changing circumstances : implications for trophic dynamics and species conservation in the Fennoscandian tundra
(Doctoral thesis; Doktorgradsavhandling, 20090316)A special case of population fluctuation is multiannual population cycles. While such population cycles exist in several ecosystems, they are more prominent in northern (e.g.tundra) ecosystems, especially among key stone ... 
Spatial and temporal analysis of fluid venting systems on the NorvegianSvalbard margin
(Doctoral thesis; Doktorgradsavhandling, 20090403) 
POPcocktails : hangover threats for seabirds? The response of three seabird species to exposure to persistent organic pollutants in the Barents Sea
(Doctoral thesis; Doktorgradsavhandling, 20090611)The overall aim of the thesis was to study immunological effects of pollutants in Barents Sea. The Glaucous gull (Larus hyperboreus), blacklegged kittiwake (Rissa tridactyla) and Atlantic puffin (Fratercula arctica) were ... 
Behavioral and energetic response of Arcticbreeding seabirds to environmental variability.
(Doctoral thesis; Doktorgradsavhandling, 20090616)Knowledge about the extent to which organisms inhabitating the Arctic are able to adjust to environmental variability is essential in order to predict the impact of future climate change. In this context, the flexibility ... 
Particle precipitation : effects on selected ionospheric phenomena
(Doctoral thesis; Doktorgradsavhandling, 20091126)The motivation behind this thesis has been to study particle precipitation from the Sun into the Earth’s upper atmosphere and its effects on selected ionospheric phenomena. Particles from the solar wind can enter the Earth's ... 
The few touch digital diabetes diary : userinvolved design of mobile selfhelp tools for peoplewith diabetes
(Doctoral thesis; Doktorgradsavhandling, 20091210)Paradoxically, the technological revolution that has created a vast health problem due to a drastic change in lifestyle also holds great potential for individuals to take better care of their own health. The first consequence ... 
Statistical Analysis of Multilook Polarimetric Radar Images with the Mellin Transform
(Doctoral thesis; Doktorgradsavhandling, 20100519)This thesis presents methods for statistical analysis of the probability distributions used to model multilook polarimetric radar images. The methods are based on a matrixvariate version of Mellin's integral transform. The ... 
Relative sea level, deglaciation and tsunami history deduced from isolation basins
(Doctoral thesis; Doktorgradsavhandling, 20101015)NORSK SAMANDRAG: <br>Denne avhandlinga tek for seg endringane i relativt havnivå – strandforskyvinga – dei siste vel 11.500 åra på kysten av Finnmark og i midtre Hardanger. Ei stor mengd kjerneprøver frå avsettingane i ... 
Signal processing techniques for the enhancement of marine seismic data
(Doctoral thesis; Doktorgradsavhandling, 20101112)This thesis presents several signal processing techniques applied to the enhancement of marine seismic data. Marine seismic exploration provides an image of the Earth's subsurface from reflected seismic waves. Because the ... 
Characterization of subseabed fluid flow and hydrate systems at Nyegga, offshore mid Norway : integration of seismic imaging and velocity modeling
(Doctoral thesis; Doktorgradsavhandling, 20101112)What causes the escape of natural gases to the seafloor and how significant this escape has been along the midNorwegian continental margin? These are questions that guided the doctoral thesis. The thesis is part of a ...