Now showing items 14901-14920 of 36239

    • Effects of mine tailing exposure on early life stages of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) 

      Farkas, Julia; Nordtug, Trond; Svendheim, Linn Hjelmeland; D Amico, Elettra; Davies, Emlyn John; Ciesielski, Tomasz Maciej; Jensen, Bjørn Munro; Kristensen, Torstein; Olsvik, Pål Asgeir; Hansen, Bjørn Henrik (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-05)
      Mining and processing of minerals produce large quantities of tailings as waste. Some countries, including Norway, allow disposal of mine tailings in the sea. In this study we investigated the impacts of tailings from a calcium carbonate (CaCO3) processing plant on early live stages of haddock (<i>Melanogrammus aeglefinus</i>) and Atlantic cod (<i>Gadus morhua</i>). Fish eggs (3 days post fertilisation; ...
    • Sea ice decline drives biogeographical shifts of key Calanus species in the central Arctic Ocean 

      Ershova, Elizaveta A.; Kosobokova, Ksenia N.; Banas, Neil S.; Ellingsen, Ingrid; Niehoff, Barbara; Hildebrandt, Nicole; Hirche, Hans-Juergen (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-19)
      In recent decades, the central Arctic Ocean has been experiencing dramatic decline in sea ice coverage, thickness and extent, which is expected to have a tremendous impact on all levels of Arctic marine life. Here, we analyze the regional and temporal changes in pan-Arctic distribution and population structure of the key zooplankton species <i>Calanus glacialis</i> and <i>C. hyperboreus</i> in ...
    • Evaluation of the EQ-5D-3L and 5L versions in low back pain patients 

      Garratt, Andrew; Furunes, Håvard; Hellum, Christian; Solberg, Tore; Brox, Jens Ivar; Storheim, Kjersti; Johnsen, Lars Gunnar (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-28)
      <p>Background: The EuroQol EQ-5D is one of the most widely researched and applied patient-reported outcome measures worldwide. The original EQ-5D-3L and more recent EQ-5D-5L include three and five response categories respectively. Evidence from healthy and sick populations shows that the additional two response categories improve measurement properties but there has not been a concurrent comparison ...
    • Advanced data analytics for ship performance monitoring under localized operational conditions 

      Bui, Khanh Quang; Perera, Lokukaluge Prasad (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-08)
      Improving the operational energy efficiency of existing ships is attracting considerable interests to reduce the environmental footprint due to air emissions. As the shipping industry is entering into Shipping 4.0 with digitalization as a disruptive force, an intriguing area in the field of ship’s operational energy efficiency is big data analytics. This paper proposes a big data analytics framework ...
    • Ending the Cinderella status of terraces and lynchets in Europe: The geomorphology of agricultural terraces and implications for ecosystem services and climate adaptation 

      Brown, Antony; Fallu, Daniel Joseph; Walsh, Kevin; Cucchiaro, Sara; Tarolli, Paolo; Zhao, Pengzhi; Pears, Ben R.; Oost, Kristof; Snape, Lisa; Lang, Andreas; Albert, Rosa Maria; Alsos, Inger Greve; Waddington, Clive (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-20)
      Terraces and lynchets are ubiquitous worldwide and can provide increasingly important Ecosystem Services (ESs), which may be able to mitigate aspects of climate change. They are also a major cause of non-linearity between climate and erosion rates in agricultural systems as noted from alluvial and colluvial studies. New research in the ‘critical zone’ has shown that we must now treat soil production ...
    • A netting-based alternative to rigid sorting grids in the small-meshed Norway pout (Trisopterus esmarkii) trawl fishery 

      Eigaard, Ole R.; Herrmann, Bent; Feekings, Jordan; Krag, Ludvig Ahm; Sparrevohn, Claus R. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-28)
      A new bycatch reduction device, termed “Excluder”, is presented as an alternative to a traditional rigid sorting grid, mandatory in the small-meshed Norway Pout (<i>Trisopterus esmarkii</i>) trawl fishery in the North Sea. The fishery is a high-volume fishery with large vessels, large demersal trawls and catches up to 100 tons per haul of this small forage fish. The Excluder is a 30 m long netting-based ...
    • Drama as democratic and inclusive practice 

      Storsve, Kristine; Gjærum, Rikke Gürgens; Rasmussen, Bjørn K. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-06)
      This article examines how two devising theater projects with 43 seventh grade pupils respond to values in adaptive education: inclusion, appreciation, variation, experience, relevance, context, and participation. We focus on statue work and the formation of ideas through negotiation processes. The project responds to and concretizes democratic working methods and a pupil perspective in adaptive ...
    • A New Development of the Classical Single Ladder Problem via Converting the Ladder to a Staircase 

      Høibakk, Ralph; Lukkassen, Dag; Meidell, Annette; Persson, Lars Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-08)
      Our purpose is to shed some new light on problems arising from a study of the classical Single Ladder Problem (SLP). The basic idea is to convert the SLP to a corresponding Single Staircase Problem. The main result (Theorem 1) shows that this idea works fine and new results can be obtained by just calculating rational solutions of an algebraic equation. Some examples of such concrete calculations ...
    • Caught up in Care: Crafting Moral Subjects of Chronic Fatigue 

      Risør, Mette Bech; Lillevoll, Kjersti (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-17)
      Patients with chronic fatigue receive advice to improve symptom management and well-being. This advice is based on ideas of self-management and is conveyed during clinical assessment as “activity regulation.” Based on ethnographic fieldwork in a hospital clinic in Norway, we show how these patients attempt to demonstrate their competences and everyday concerns, and how the ideology of self-management ...
    • Circulating sex-steroids and Staphylococcus aureus nasal carriage in a general female population 

      Stensen, Dina Benedicte Berg; Småbrekke, Lars; Olsen, Karina; Grimnes, Guri; Nielsen, Christopher Sivert; Sollid, Johanna U Ericson; Simonsen, Gunnar Skov; Almås, Bjørg; Furberg, Anne-Sofie (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02)
      <p>Objective: <i>Staphylococcus aureus</i> is a major human pathogen, and nasal carriers have an increased risk for infection and disease. The exploration of host determinants for nasal carriage is relevant to decrease infection burden. Former studies demonstrate lower carriage prevalence in women and among users of progestin-only contraceptives. The aim of this study was to investigate the possible ...
    • Choice of Pole and Ski Lengths Among Elite Cross-Country Skiers: The Influence of Sex and Performance Level 

      Torvik, Per Øyvind; van den Tillaar, Roland Johannes Wilhelmus; Sandbakk, Øyvind (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-22)
      Cross-country (XC) skiers employ whole-body exercise to generate speed through poles and skis. The choice of optimal pole and ski lengths are therefore of high importance. The aim of this study was to document pole and ski lengths among elite male and female cross-country skiers in the classical and skating styles and to investigate sex differences in body-height-normalized pole and ski lengths. Our ...
    • Behavioural change in green transportation: Micro-economics perspectives and optimization strategies 

      Bordin, Chiara; Tomasgard, Asgeir (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-22)
      The increasing demand for Electric Vehicle (EV) charging is putting pressure on the power grids and capacities of charging stations. This work focuses on how to use indirect control through price signals to level out the load curve in order to avoid the power consumption from exceeding these capacities. We propose mathematical programming models for the indirect control of EV charging that aim at ...
    • Wind Power Prediction with Machine Learning Methods in Complex Terrain Areas 

      Sæther, Brynhild Bentsen (Master thesis; Mastergradsoppgave, 2021-06-29)
      The increasing amount of intermittant wind energy sources connected to the power grid present several challenges in balancing the power network. Accurate prediction of wind power production is identified as one of the most important measures for balancing the power network while maintaining a sustainable integration of wind power in the power grid. However, the volatile nature of wind makes wind ...
    • A Class-E-Based Resonant AC-DC Converter With Inherent PFC Capability 

      Al-Sallami, Hussein; M. Ammar, Ahmed; Nour, Yasser; A. E. Andersen, Michael (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-22)
      This paper investigates the use of the class-E inverter for power factor correction (PFC) applications. Analytical and state-space models are derived showing the class-E inverter’s capability of achieving inherent PFC operation with a constant duty cycle. The inherent PFC operation limits the controller responsibility to the regulation of the output voltage, which is key for resonant converters with ...
    • Chitosomes-In-Chitosan Hydrogel for Acute Skin Injuries: Prevention and Infection Control 

      Hemmingsen, Lisa Myrseth; Julin, Kjersti; Ahsan, Luqman; Basnet, Purusotam; Johannessen, Mona; Skalko-Basnet, Natasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-12)
      Burns and other skin injuries are growing concerns as well as challenges in an era of antimicrobial resistance. Novel treatment options to improve the prevention and eradication of infectious skin biofilm-producing pathogens, while enhancing wound healing, are urgently needed for the timely treatment of infection-prone injuries. Treatment of acute skin injuries requires tailoring of formulation to ...
    • Improving Geopolymer Characteristics with Addition of Poly-Vinyl Alcohol (PVA) Fibers 

      Ekaputri, Januarti Jaya; Fujiyama, Chikako; Chijiwa, Nobuhiro; Ho, Tu Dac; Nguyen, Hung Thanh (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-20)
      This paper presents the benefits of PVA fibers in improving the mechanical properties of class F fly-ash-based geopolymer concrete. The activator used in the geopolymer was 8M sodium hydroxide (NaOH) and sodium silicate (Na<sub>2</sub>SiO<sub>3</sub>), with a mass ratio of Na<sub>2</sub>SiO<sub>3</sub> to NaOH varied from 1.5 to 2.5. Cylindrical specimens with a diameter of 100 mm and a height of ...
    • Detection and Delineation of Produced Water Slicks in Sentinel-1 Synthetic Aperture Radar Images 

      Saus, Brynjar Andersen (Master thesis; Mastergradsoppgave, 2021-06-21)
      Near oil and gas platforms oil detection services regularly detect oil slicks that are a result of legal releases of produced water. These slicks are usually observed using SAR imagery and the important task of observing and monitoring these slicks is as of now carried out manually by human operators aggregated with reported release information. In this thesis we propose three separate approaches ...
    • Detection of Marine Plastic Debris in the North Pacific Ocean using Optical Satellite Imagery 

      Båtvik, Tora (Master thesis; Mastergradsoppgave, 2021-06-15)
      Plastic pollution is ubiquitous across marine environments, yet detection of anthropogenic debris in the global oceans is in its infancy. Here, we exploit high-resolution multispectral satellite imagery over the North Pacific Ocean and information from GPS-tracked floating plastic conglomerates to explore the potential for detecting marine plastic debris via spaceborne remote sensing platforms. ...
    • Quantum Dot Nanomedicine Formulations Dramatically Improve Pharmacological Properties and Alter Uptake Pathways of Metformin and Nicotinamide Mononucleotide in Aging Mice 

      Hunt, Nick; Lockwood, Glen P; Kang, Sun Woo; Westwood, Lara; Limantoro, Christina; Chrzanowski, Wojciech; McCourt, Peter Anthony; Kuncic, Zdenka; Le Couteur, David G; Cogger, V.C. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-24)
      Orally administered Ag<sub>2</sub>S quantum dots (QDs) rapidly cross the small intestine and are taken up by the liver. Metformin and nicotinamide mononucleotide (NMN) target metabolic and aging processes within the liver. This study examined the pharmacology and toxicology of QD-based nanomedicines as carriers of metformin and NMN in young and old mice, determining if their therapeutic potency and ...
    • Preliminary Evaluation of a mHealth Coaching Conversational Artificial Intelligence for the Self-Care Management of People with Sickle-Cell Disease 

      Issom, David-Zacharie; Rochat, Jessica; Hartvigsen, Gunnar; Lovis, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2020)
      Adherence to the complex set of recommended self-care practices among people with Sickle-Cell Disease (SCD) positively impacts health outcomes. However, few patients possess the required skills (i.e. disease-specific knowledge, adequate levels of self-efficacy). Consequently, adherence rates remain low and only 1% of patients are empowered enough to master the self-care practices. Health coaching ...