Browsing Faculty of Mathematics and Natural Sciences by Document Types "Doctoral thesis"
Now showing items 41-60 of 870
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Arctic sea ice altimetry - advances and current uncertainties
(Doctoral thesis, 2014-06-11)One of the most prominent features of global climate change is the reduction in Arctic sea ice thickness. The main tool to derive sea ice thickness on an Arctic wide scale is altimetry from satellites, yet current estimates ... -
Arctic-Atlantic Climate Variability and Predictability in Observations and in a Dynamical Prediction System
(Doctoral thesis, 2023-11-03)Hovedfokuset i denne doktorgradsoppgaven er å forstå dekadisk klimaprediktabilitet (forutsigbarhet i klimaet) for å forbedre klimamodeller og klimavarsel. Klimavarseling viser lovende resultat, men det er fremdeles ... -
Aspects of Electron Dynamics in Atoms Exposed to Single Cycle Electromagnetic Pulses
(Doctoral thesis, 2018-06-29)This thesis covers the topic in atomic physics: Interaction of a strong external field with Rydberg hydrogen atom. In three scientific publications, we have targeted physical processes such as the field ionization in the ... -
Aspects of in situ angular scattering measurements in contrasting waters
(Doctoral thesis, 2022-01-28)Rapid changes are observed in oceanic and coastal environments around the world due to global temperatures increases, ocean acidification and changing weather patterns - anthropogenic climate change. These changes have ... -
Aspects on interactions between mid- to high latitude atmospheric circulation and some surface processes
(Doctoral thesis, 2006-06-08)The Arctic is a hot topic in Climate Research. A large number of signs of a warming Arctic Climate have been identified the latest years. This is of major concern in light of the increasing atmospheric content of greenhouse ... -
Assessing and comparing climatic control on distribution and reproduction of alpine and lowland species in the subalpine habitat of western Norway.
(Doctoral thesis, 2012-02-06)Aims and background: Species range shift is among the most well-documented responses to climate change. As a result, a growing number of studies model species climatic niches to predict how species ranges may displace in ... -
Assessing and Mitigating Risks in Computer Systems
(Doctoral thesis, 2008-09-26)When it comes to non-trivial networked computer systems, bulletproof security is very hard to achieve. Over a system's lifetime new security risks are likely to emerge from e.g. newly discovered classes of vulnerabilities ... -
Assessing the Norwegian Offshore Wind Resources: Climatology, Power Variability and Wind Farm Siting
(Doctoral thesis, 2022-09-09)De norske havvindressursene er fantastiske. Likevel er det ingen operative vindparker i de norske havvområdene. Tatt i betraktning både utslippsmål og forventet økning i elektrisitetsforbruk har regjerningen nå begynt å ... -
Assessment of Sequential and Simultaneous Ensemble-based History Matching Methods for Weakly Non-linear Problems
(Doctoral thesis, 2015-02-13)The ensemble Kalman filter (EnKF) has, since its introduction in 1994, gained much attention as a tool for sequential data assimilation in many scientific areas. In recent years, the EnKF has been utilized for estimating ... -
Assumptions, Efficiency and Trust in Non-Interactive Zero-Knowledge Proofs
(Doctoral thesis, 2022-11-04)Vi lever i en digital verden. En betydelig del av livene våre skjer på nettet, og vi bruker internett for stadig flere formål og er avhengig av stadig mer avansert teknologi. Det er derfor viktig å beskytte seg mot ondsinnede ... -
At what cost? Attempting to quantify cost of resistance in bacterium-phage interactions
(Doctoral thesis, 2023-12-15)Biodiversiteten i mikrobielle samfunn er svært stor. Organismene som danner samfunnet må stadig gjøre avveininger mellom ulike karaktertrekk som påvirker deres muligheter for vekst, konkurranse og overlevelse. For å beskrive ... -
Atlantic salmon (Salmo salar L.) sterol metabolism and metabolic health – impact of dietary lipids
(Doctoral thesis, 2014-12-12)Marine resources are today limited, and due to this there is an increasing inclusion of non-marine lipids in the diet of farmed salmonids. An optimal diet for farmed Atlantic salmon (Salmo salar L.) should not only promote ... -
Atlantic thermohaline changes and its implications on the carbon cycle during the Last Interglacial
(Doctoral thesis, 2020-06-16)Large and abrupt changes in the Earth’s climate have been recorded in marine records and Greenland ice cores and mostly characterize the last glacial period. These sudden transitions of climate, occurring within a few ... -
Atlantic Water in the Arctic Ocean - Mechanisms and Impacts
(Doctoral thesis, 2021-08-19)The Arctic Ocean plays a fundamental role in regulating Earth’s climate, and a changing Arctic will affect climate, weather, and life everywhere on the planet. Understanding the fundamental dynamics and mechanisms driving ... -
Atlantic water inflow into the Arctic Ocean: studies of pathways, transport and mixing processes using observations from ships and autonomous underwater vehicles
(Doctoral thesis, 2024-01-23)Nordishavet spiller en viktig rolle i det globale klimasystemet. Produksjon av kaldt vann med høy tetthet, samt frysing av sjøis i Arktis, bidrar til å drive den Atlantiske meridionale omveltningssirkulasjonen og kan påvirke ... -
Atmospheric icing and meteorological variables: Full scale experiment and testing of models
(Doctoral thesis, 2005-04-15) -
Auroral imaging as a tracer of global magnetospheric dynamics
(Doctoral thesis, 2010-11-12) -
Auroral Region Morphology and the Influence of Earth’s Rotation on Geospace Dynamics
(Doctoral thesis, 2024-06-07)Koblingen mellom solvinden, magnetosfæren, og ionosfæren er avgjørende for å forstå verdensrommet og dens påvirkning på Jorden. I de øvre lagene av atmosfæren ved polene, spesielt i området kjent som auroraregionen, møtes ... -
Autonomic Operation of a Large High Performance On-Line Compute Cluster
(Doctoral thesis, 2015-12-10)A High-Level Trigger (HLT) system is composed of both hardware and software. Designing the physical layout of the cluster mainly concerns the hardware; node distribution, network layout, estimation of power requirements, ... -
Bacterial biofilms on the kelp Laminaria hyperborea
(Doctoral thesis, 2011-03-23)This thesis deals with bacterial communities in biofilms on the surfaces of the kelp Laminaria hyperborea and their roles in carbon cycling. Kelp forests are characterized by high biodiversity and productivity, and cycling ...