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Modelling persistent methane seepage offshore western Svalbard since early Pleistocene
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-31)Recent observations of extensive methane release into the oceans and atmosphere have raised concern as to whether rising temperatures across the Arctic could drive rapid destabilization of gas hydrate reservoirs. Here, we report modelling results from hydrate-modulated methane seepage from Vestnesa Ridge, offshore western Svalbard, suggesting that continuous leakage has occurred from the seafloor ... -
Subliminal priming og betinging av kunstige stereotyper
(Master thesis; Mastergradsoppgave, 2018-11-09)En hyppig brukt metode for å studere subliminale fenomener er det maskerte primings-paradigmet. Tidligere studier med dette paradigmet har vist at subliminal priming og betinging har en effekt, men det er likevel uklarheter knyttet til ulike modererende faktorer. Slike modererende faktorer kan for eksempel være forsøksdeltakeres holdninger mot en stimulus eller det kan også være av mer teknisk art ... -
An assessment of biomarker-based multivariate classification methods versus the PIP25 index for paleo Arctic sea ice reconstruction
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-30)The development of various combinative methods for Arctic sea ice reconstruction using the sympagic highly-branched isoprenoid (HBI) IP<sub>25</sub> in conjunction with pelagic biomarkers has often facilitated more detailed descriptions of sea ice conditions than using IP<sub>25</sub> alone. Here, we investigated the application of the Phytoplankton-IP<sub>25</sub> index (PIP<sub>25</sub>) and a ... -
Prevention of anxiety and depression in school children: Effectiveness of the transdiagnostic EMOTION program
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018)<i>Objective - </i>The objective of the study was to examine the effectiveness of a transdiagnostic program (EMOTION, Coping Kids Managing Anxiety and Depression) targeting symptoms of anxiety and depression in schoolchildren by comparing the intervention condition (EC) to a control condition (CC).</p> <p><i>Method - </i>A clustered randomized design was used with schools as the unit of randomization. ... -
Biogenic silica production and diatom dynamics in the Svalbard region during spring
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-06)Diatoms are generally the dominant contributors to the Arctic Ocean spring bloom, which is a key event in regional food webs in terms of capacity for secondary production and organic matter export. Dissolved silicic acid is an obligate nutrient for diatoms and has been declining in the European Arctic since the early 1990s. The lack of regional silicon cycling information precludes understanding the ... -
In search of a common currency: A comparison of seven EQ‐5D‐5L value sets
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-24)The recently published EQ‐5D‐5L value sets from Canada, England, Japan, Korea, the Netherlands, Spain, and Uruguay are compared with an aim to identify any similarities in preference pattern. We identify some striking similarities for Canada, England, the Netherlands, and Spain in terms of (a) the relative importance of the 5 dimensions; (b) the relative utility decrements across the 5 levels; and ... -
Live-cell imaging of human spermatozoa using structured illumination microscopy
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-05)Structural details of spermatozoa are interesting from the perspectives of fundamental biology and growing reproductive health problems. Studies of nanostructural details of these extremely motile cells have been limited to fixed cells, largely using electron microscopy. Here we provide the protocols for and demonstrate live-cell multi-color super-resolution imaging of human spermatozoa using ... -
Teamwork in primary palliative care: general practitioners’ and specialised oncology nurses’ complementary competencies
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-21)<p><i>Background</i>: Generalists such as general practitioners and district nurses have been the main actors in community palliative care in Norway. Specialised oncology nurses with postgraduate palliative training are increasingly becoming involved. There is little research on their contribution. This study explores how general practitioners (GPs) and oncology nurses (ONs) experience their ... -
Patterns of detectable viraemia among children and adults with HIV infection taking antiretroviral therapy in Zimbabwe
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-31)<i>Objective</i>: To investigate the incidence and predictors of viraemia among individuals on antiretroviral therapy (ART) in Harare, Zimbabwe.<p> <p><i>Methods</i>: Children (0–19 years) and adults (>19 years) starting ART between 2013 and 2015 were followed for a median of 2.8 and 2.7 years, respectively. The incidence rates of virological failure (VF), low-level viraemia (LLV), and viral ... -
Functional roles and redundancy of demersal Barents Sea fish: Ecological implications of environmental change
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-21)When facing environmental change and intensified anthropogenic impact on marine ecosystems, extensive knowledge of how these systems are functioning is required in order to manage them properly. However, in high-latitude ecosystems, where climate change is expected to have substantial ecological impact, the ecosystem functions of biological species have received little attention, partly due to the ... -
External damage to trawl-caught Northeast arctic cod (Gadus morhua): Effect of codend design
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-22)The purpose of this study was to investigate the extent of external damage (gear marks, pressure injuries, ecchymosis and skin abrasion) present on trawl-caught cod (Gadus morhua) and to examine whether the extent of damage could be reduced by introducing changes in the gear. We tested whether changing the 2-panel knotted codend used by the Norwegian trawler fleet operating in the Barents Sea today ... -
Progesterone receptors in prostate cancer: Progesterone receptor B is the isoform associated with disease progression
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-07-27)The role of steroid hormones in carcinogenesis of the prostate is to some extent unraveled thorough the effect of androgen deprivation therapy on prostate cancer (PCa) progression. Other members of the steroid hormone family, such as progesterone, are also implicated in PCa, but progesterone’s role remains undefined. This study aimed to examine the distribution of progesterone receptor isoforms ... -
Reflection groups, arrangements, and invariant real varieties
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-18)Let <i>X</i> be a nonempty real variety that is invariant under the action of a reflection group <i>G</i>. We conjecture that if <i>X</i> is defined in terms of the first <i>k</i> basic invariants of <i>G</i> (ordered by degree), then <i>X</i> meets a <i>k</i>-dimensional flat of the associated reflection arrangement. We prove this conjecture for the infinite types, reflection groups of rank at most ... -
DNA binding with a minimal scaffold: structure-function analysis of Lig E DNA ligases
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-07-11)DNA ligases join breaks in the phosphodiester backbone of DNA by catalysing the formation of bonds between opposing 5′P and 3′OH ends in an adenylation-dependent manner. Catalysis is accompanied by reorientation of two core domains to provide access to the active site for cofactor utilization and enable substrate binding and product release. The general paradigm is that DNA ligases engage their DNA ... -
Evaluation of feature ranking and regression methods for oceanic chlorophyll-a estimation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-22)This paper evaluates two alternative regression techniques for oceanic chlorophyll-a (Chl-a) content estimation. One of the investigated methodologies is the recently introduced Gaussian process regression (GPR) model. We explore two feature ranking methods derived for the GPR model, namely sensitivity analysis (SA) and automatic relevance determination (ARD). We also investigate a second ... -
The Role of Estrogen Receptor β (ERβ) in the Establishment of Hierarchical Social Relationships in Male Mice
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-22)Acquisition of social dominance is important for social species including mice, for preferential access to foods and mates. Male mice establish social rank through agonistic behaviors, which are regulated by gonadal steroid hormone, testosterone, as its original form and aromatized form. It is well known that estrogen receptors (ERs), particularly ER α (ERα), mediate effects of aromatized testosterone, ... -
On the Isotypic Decomposition of Cohomology Modules of Symmetric Semi-algebraic Sets: Polynomial Bounds on Multiplicities
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-30)We consider symmetric (under the action of products of finite symmetric groups) real algebraic varieties and semi-algebraic sets, as well as symmetric complex varieties in affine and projective spaces, defined by polynomials of degrees bounded by a fixed constant <i>d</i>. We prove that if a Specht module, S<sup>λ</sup>, appears with positive multiplicity in the isotypic decomposition of the ... -
Making New Health Services Work: Nurse Leaders as Facilitators of Service Development in Rural Emergency Services
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-27)Nurse leaders in middle management positions in Norway and other Western countries perform additional new tasks due to high demands for quality and efficacy in healthcare services. These nurses are increasingly becoming responsible for service development and innovation in addition to their traditional leadership and management roles. This article analyses two Norwegian nurse leaders efforts in ... -
On the equivariant Betti numbers of symmetric definable sets: vanishing, bounds and algorithms
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-02)Let R be a real closed field. We prove that for any fixed <i>d</i>, the equivariant rational cohomology groups of closed symmetric semi-algebraic subsets of R<sup><i>k</i></sup> defined by polynomials of degrees bounded by <i>d</i> vanishes in dimensions <i>d</i> and larger. This vanishing result is tight. Using a new geometric approach we also prove an upper bound of [mathematical formula] on the ... -
Method for detection of leads from Sentinel-1 SAR images
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-05)The presence of leads with open water or thin ice is an important feature of the Arctic sea ice cover. Leads regulate the heat, gas and moisture fluxes between the ocean and atmosphere and are areas of high ice growth rates during periods of freezing conditions. Here, an algorithm providing an automatic lead detection based on synthetic aperture radar images is described that can be applied to a ...