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Mesospheric Dust - radar applications for detection and investigation
(Doctoral thesis; Doktorgradsavhandling, 2023-11-15)<p>Large amounts of meteoric particles ablate globally into the Earth’s atmosphere each day, and they interact with the atmosphere through several processes in the mesosphere and below. These processes include dust charging, where dust is expected to influence the charge balance in the D-region of the ionosphere. Consequently, the charged dust particles can influence the incoherent scatter that is ... -
Uteskole og psykososialt miljø. En kvalitativ studie av uteskolens betydning med tanke på tilrettelegging for det psykososiale miljøet.
(Mastergradsoppgave; Master thesis, 2023-05-14)I denne masteroppgaven undersøkes sammenhenger mellom uteskole som læringsarena og det psykososiale miljøet i skolen. Temaene er valgt med bakgrunn i aktualiteten av uteskole og psykisk helse, som del av det psykososiale miljøet. I tillegg var en interesse for å oppnå økt forståelse for temaene også innvirkende. Formålet med studien har vært å belyse uteskolens betydning med tanke på tilrettelegging ... -
Long-term responses of Icelandic Arctic foxes to changes in marine and terrestrial ecosystems
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-04)The long-term dynamics of predator populations may be driven by fluctuations in resource availability and reflect ecosystem changes such as those induced by climate change. The Icelandic Arctic fox (Vulpes lagopus) population has known major fluctuations in size since the 1950s. Using stable isotopes analysis of bone collagen over a long-time series (1979– 2018), we aimed at identifying the main ... -
Genetic Overlap Between Global Cortical Brain Structure, C-Reactive Protein, and White Blood Cell Counts
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-20)BACKGROUND: For many brain disorders, a subset of patients jointly exhibit alterations in cortical brain structure and elevated levels of circulating immune markers. This may be driven in part by shared genetic architecture. Therefore, we investigated the phenotypic and genetic associations linking global cortical surface area and thickness with blood immune markers (i.e., white blood cell counts ... -
Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012–2020
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-20)During several surveys covering the north-western and northern Svalbard waters, and the deeper Yermak Plateau north of Svalbard during the period 2012–2020, 291 standardized hauls with a demersal trawl were made. All fishes in the catches were identified to the lowest possible taxonomic level, mostly to species. In addition to the data generated from the trawl catches, bottom temperature, salinity, ... -
Characterizing Håkon Mosby Mud Volcano (Barents Sea) cold seep systems by combining ROV-based acoustic data and underwater photogrammetry
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-31)Cold-seep systems have a unique geo-ecological significance in the deep-sea environment. They impact the variability of present-day submarine sedimentary environments, affecting the evolution of the landscape over time and creating a variety of submarine landforms, one of which is Mud Volcanoes (MVs). MVs are submarine landforms form due extrusion of mud, fluids, and gas, mainly methane, from deeper ... -
Challenges and objections to body temperature monitoring among pre-hospital personnel. A modified nominal group technique study.
(Mastergradsoppgave; Master thesis, 2021-11-01)Background: Hypothermia is common and correlates with mortality and morbidity for emergency patients, but a pre-hospital temperature measurement is often omitted. Objectives: To investigate barriers that pre-hospital care (PHC) providers experience with temperature monitoring, and solutions to the problem. Study design: Modified nominal group technique. Materials and methods: Fourteen PHC providers ... -
Acclimation of circadian rhythms in woodland strawberries (Fragaria vesca L.) to Arctic and mid-latitude photoperiods
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-10)Background Though many abiotic factors are constantly changing, the photoperiod is a predictable factor that enables plants to time many physiological responses. This timing is regulated by the circadian clock, yet little is known about how the clock adapts to the differences in photoperiod between mid-latitudes and high latitudes. The primary objective of this study was to compare how clock gene ... -
Antibiotic prescriptions among dentists across Norway and the impact of COVID-19 pandemic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-08)Background The prescription of antibiotics in dental practice contributes signifcantly to the total use of antibiotics in primary healthcare. This study aimed to evaluate antibiotic prescription in dental practice during the years 2016–2021 in Norway and their relative contribution to national outpatient consumption and to investigate the infuence of age, gender, geographic region, and COVID-19. A ... -
Co-simulation-based optimal reactive power control in smart distribution network
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-30)The increasing integration of distributed energy resources such as photovoltaic (PV) systems into distribution networks introduces intermittent and variable power, leading to high voltage fluctuations. High PV integration can also result in increased terminal voltage of the network during periods of high PV generation and low load consumption. These problems can be solved by optimal utilization ... -
Enzymatic Hydrolysis of Orange-Footed Sea Cucumber (Cucumaria frondosa)—Effect of Different Enzymes on Protein Yield and Bioactivity
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-07)While sea cucumber is a food delicacy in Asia, these food resources are less exploited in Europe. The aim of this study was to determine the chemical composition and potential food applications of the less exploited orange-footed sea cucumber (Cucumaria frondosa). In particular, the antioxidative capacity and free amino acids associated with the umami flavor released by enzymatic hydrolyses by ... -
The application of unmanned aerial vehicle (UAV) surveys and GIS to the analysis and monitoring of recreational trail conditions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-04)Recreational trails are a vital element of protected natural areas (PNAs) infrastructure, which enables visitors to travel through and engage in various activities such as hiking, biking, horse riding. Degradation of trails adversely affects the natural environment as well as the safety and comfort of visitors. As the role of many PNAs is to protect the natural environment and to provide recreational ... -
Are offshore platforms a good candidate to restore functional diversity of reef fish communities in the Arabian Gulf?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-04)Human-made structures are ubiquitous in the marine realm. Complex structures such as oil and gas platforms may constitute a suitable habitat for species in areas where natural reefs have been highly degraded by coastal development. We here explore the suitability of fish assemblages associated to offshore platforms as surrogates for depleted fish stocks from coastal areas. Taxonomic and functional ... -
Small rodent population cycles and plants – after 70 years, where do we go?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-12)Small rodent population cycles characterise northern ecosystems, and the cause of these cycles has been a long-lasting central topic in ecology, with trophic interactions currently considered the most plausible cause. While some researchers have rejected plant–herbivore interactions as a cause of rodent cycles, others have continued to research their potential roles. Here, we present an overview ... -
An Arctic natural oil seep investigated from space to the seafloor
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-19)Due to climate change, decreasing ice cover and increasing industrial activities, Arctic marine ecosystems are expected to face higher levels of anthropogenic stress. To sustain healthy and productive ocean ecosystems, it is imperative to build baseline data to assess future changes. Herein, a natural oil seep site offshore western Svalbard (Prins Karls Forland, PKF, 80–100 m water depth), discovered ... -
A Heterotic Kodaira--Spencer Theory at One-Loop
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-23)We consider a heterotic version of six-dimensional Kodaira-Spencer gravity derived from the heterotic superpotential. We compute the one-loop partition function and fnd it can be expressed as a product of holomorphic Ray-Singer torsions. We discuss its topological properties and potential gauge and gravitational anomalies. We show these anomalies can be cancelled using Green-Schwarz-like ... -
Laparoscopic rectal cancer resection yields comparable clinical and oncological results with shorter hospital stay compared to open access: a 5-year national cohort
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-04)Purpose Although widely applied, the results following laparoscopic rectal resection (LRR) compared to open rectal resection (ORR) are still debated. The aim of this study was to assess clinical short- and long-term results as well as oncological resection quality following LRR or ORR for cancer in a 5-year national cohort.<p> <p>Methods Data from the Norwegian Registry for Gastrointestinal Surgery ... -
Associations between serum taurine concentrations in mothers and neonates and the children's anthropometrics and early neurodevelopment: Results from the Seychelles Child Development Study, Nutrition Cohort 2
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-25)Background: High concentrations of taurine are present in the developing human brain and maternal breast milk. Taurine is thought to influence fetal growth and brain development based on experimental rodent studies. As fish is an important dietary source of taurine, we investigated associations between taurine concentrations and child outcomes in a high fish consuming population.<p> <p>Objective: ... -
Climate warming accelerates somatic growth of an Arctic fish species in high-latitude lakes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-05)High-latitude aquatic ecosystems are responding to rapid climate warming. A longer ice-free season with higher water temperatures may accelerate somatic growth in lake ectotherms, leading to widespread ecological implications. In fish, rising temperatures are expected to boost rates of food intake and conversion, and predictions based on empirical relationships between temperature and growth suggest ... -
Informed investors, screening, and sorting on the London capital market, 1891-1913
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-02)Thousands of prospectuses offered shares to British investors at the turn of the twentieth century. We find evidence that there were informed investors who participated in the market at this time. Firms that attracted additional investor demand were more likely to be listed on the London Stock Exchange, survive longer, and achieve better long-run equity returns. We find that the exchange screened ...