Browsing Faculty of Mathematics and Natural Sciences by Title
Now showing items 484-503 of 9860
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An Assessment of Geophysical Survey Techniques for Characterising the Subsurface Around Glacier Margins, and Recommendations for Future Applications
(Journal article; Peer reviewed, 2022)Geophysical surveys provide an efficient and non-invasive means of studying subsurface conditions in numerous sedimentary settings. In this study, we explore the application of three geophysical methods to a proglacial ... -
Assessment of growth performance and liver lipid accumulation in Atlantic salmon (Salmo salar) fed an insect-based diet
(Master thesis, 2018-06-26)Increase in price and reduced availability of fish meal (FM) has caused the aquaculture industry to look at alternative sources for nutrients for feed production. Vegetable protein sources can replace a substantial part ... -
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 ... -
Assessment of the biodegradability of xanthan in offshore injection water
(Master thesis, 2015-04-29)The application of biopolymers in EOR operations is considered environmental friendly compared to synthetic polymers. However, microbial degradation of the biopolymers may lead to a deterioration of effect in EOR applications. ... -
Assessment of the carbon monoxide metabolism of the hyperthermophilic sulfate-reducing archaeon Archaeoglobus fulgidus VC-16 by comparative transcriptome analyses
(Peer reviewed; Journal article, 2015)The hyperthermophilic, sulfate-reducing archaeon, Archaeoglobus fulgidus, utilizes CO as an energy source and it is resistant to the toxic effects of high CO concentrations. Herein, transcription profiles were obtained ... -
Assessment of the COPD-calculator using a customized version of the NHSx DTAC Framework
(Master thesis, 2021-08-02) -
Assessment of wind conditions at a fjord inlet by complementary use of sonic anemometers and lidars
(Peer reviewed; Journal article, 2015-12-02)Wind velocity measurement devices based on the remote optical sensing, lidars, are extensively applied in wind energy research and wind farm operation. The present paper demonstrates the relevance and potential of lidar ... -
Associated bacteria of Botryococcus braunii (Chlorophyta)
(Peer reviewed; Journal article, 2019-03-27)Botryococcus braunii (Chlorophyta) is a green microalga known for producing hydrocarbons and exopolysaccharides (EPS). Improving the biomass productivity of B. braunii and hence, the productivity of the hydrocarbons and ... -
Association between body height and chronic low back pain: a follow-up in the Nord-Trøndelag Health Study
(Peer reviewed; Journal article, 2015-06-15)Objective: To study potential associations between body height and subsequent occurrence of chronic low back pain (LBP). Design: Prospective cohort study. Setting: The North-Trøndelag Health Study (HUNT). Data were ... -
Association between Hyperacusis and Tinnitus
(Journal article; Peer reviewed, 2020-07)Many individuals with tinnitus report experiencing hyperacusis (enhanced sensitivity to sounds). However, estimates of the association between hyperacusis and tinnitus is lacking. Here, we investigate this relationship in ... -
Associations Between Natural Physiological and Supraphysiological Estradiol Levels and Stress Perception
(Peer reviewed; Journal article, 2019-06-11)Stress is a risk factor for impaired general, mental, and reproductive health. The role of physiological and supraphysiological estradiol concentrations in stress perception and stress processing is less well understood. ... -
Associations between the number of children, age at childbirths and prevalence of chronic low back pain: the Nord-Trøndelag Health Study
(Journal article; Peer reviewed, 2020)Background Associations between childbirths and subsequent risk of low back pain (LBP) have not been clarified. Changes in sex hormone levels or lumbar posture during pregnancy may have an impact on LBP later in life. The ... -
Associations of lipoprotein particle profile and objectively measured physical activity and sedentary time in schoolchildren: a prospective cohort study
(Journal article; Peer reviewed, 2022-01-21)Background: Our understanding of the mechanisms through which physical activity might benefit lipoprotein metabolism is inadequate. Here we characterise the continuous associations between physical activity of different ... -
Associations of physical activity and sedentary time with lipoprotein subclasses in Norwegian schoolchildren: The Active Smarter Kids (ASK) study
(Journal article; Peer reviewed, 2019)Background and aims: Physical activity is favourably associated with certain markers of lipid metabolism. The relationship of physical activity with lipoprotein particle profiles in children is not known. Here we examine ... -
Associations of volumes and patterns of physical activity with metabolic health in children: A multivariate pattern analysis approach
(Peer reviewed; Journal article, 2018)Physical activity (PA) favorably affects metabolic health in children, but it is unclear how total volumes versus patterns (bouts and breaks) of PA relate to health. By means of multivariate pattern analysis that can handle ... -
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 ... -
Assuring the integrity of offshore carbon dioxide storage
(Journal article; Peer reviewed, 2022)Carbon capture and storage is a key mitigation strategy proposed for keeping the global temperature rise below 1.5 °C. Offshore storage can provide up to 13% of the global CO2 reduction required to achieve the Intergovernmental ... -
The asymmetric geospace as displayed during the geomagnetic storm on 17 August 2001
(Peer reviewed; Journal article, 2018-11-29)Previous studies have shown that conjugate auroral features are displaced in the two hemispheres when the interplanetary magnetic field (IMF) has a transverse (Y) component. It has also been shown that a BY component is ... -
Asymmetric Ionospheric Equivalent Currents at Magnetic Conjugate Points
(Master thesis, 2017-07-01)In this thesis we will study high-latitude ionospheric equivalent currents at magnetic conjugate points. The following questions have been addressed in this thesis: What solar zenith angle defines the dark-sunlit terminator? ...