Articles: Recent submissions

Now showing items 661-680 of 889

    • Naval sonar disrupts foraging in humpback whales 

      Sivle, Lise Doksæter; Wensveen, Paul Jacobus; Kvadsheim, Petter Helgevold; Lam, Frans-Peter Alexander; Visser, Fleur; Curé, Charlotte; Harris, Catriona M.; Tyack, Peter Lloyd; Miller, Patrick James O'Malley (2016)
      Modern long-range naval sonars are a potential disturbance for marine mammals and can cause disruption of feeding in cetaceans. We examined the lunge-feeding behaviour of humpback whales Megaptera novaeangliae before, ...

    • Uniformly stable wavelets on nonuniform triangulations 

      Bruvoll, Solveig; Lyche, Tom Johan; Mørken, Knut Martin (2016)
      In this paper we construct linear, uniformly stable, wavelet-like functions on arbitrary triangulations. As opposed to standard wavelets, only local orthogonality is required for the wavelet-like functions. Nested ...

    • Effect of composite covering on ballistic fracture damage development in ceramic plates 

      Rahbek, Dennis Bo; Simons, Jeffrey W.; Johnsen, Bernt Brønmo; Kobayashi, Takao; Shockey, Donald A. (2017)
      This paper describes the damage development in ceramics with and without composite cover during ballistic impact. This is relevant for ceramic inserts in body armor that are often covered with a composite material. To study ...

    • Echinococcus across the north: Current knowledge, future challenges 

      Davidson, Rebecca K.; Lavikainen, Antti; Konyaev, Sergey; Schurer, Janna; Miller, Andrea L.; Oksanen, Antti; Skírnisson, Karl; Jenkins, Emily (2016)
      Zoonotic Echinococcus spp. cestodes are present in almost all circumpolar nations, and have historically posed a risk to health of indigenous as well as other northern residents. However, surveillance data on both alveolar ...

    • Laboratory analysis of CBRN-substances: Stakeholder networks as clue to higher CBRN resilience in Europe 

      Plamboeck, Agneta Hånell; Stöven, Svenja; Davidson, Raquel Duarte; Fykse, Else-Marie; Griffiths, Mark D.; Nieuwenhuizen, Maarten; Rivier, Cédric; van der Schans, Marcel (2016)
      The threat of terrorists using CBRN agents continues to pose a risk of mass casualties and severe disruption of societal functions in Europe. Standardisation of crisis management activities is one important step towards ...

    • Hyperosmolar sodium chloride is toxic to cultured neurons and causes reduction of glucose metabolism and ATP levels, an increase in glutamate uptake, and a reduction in cytosolic calcium 

      Morland, Cecilie; Pettersen, Mi Nguyen; Hassel, Bjørnar (2016)
      Elevation of serum sodium, hypernatremia, which may occur during dehydration or treatment with sodium chloride, may cause brain dysfunction and damage, but toxic mechanisms are poorly understood. We found that exposure to ...

    • Data loss prevention based on text classification in controlled environments 

      Kongsgård, Kyrre Wahl; Nordbotten, Nils Agne; Mancini, Federico; Engelstad, Paal E. (2016)
      Loss of sensitive data is a common problem with potentially severe consequences. By categorizing documents according to their sensitivity, security controls can be performed based on this classification. However, errors ...

    • European defence research in crisis? The way towards strategic autonomy 

      Knutsen, Bjørn-Olav (2016)
      Defence research, in the form of both research and development (R&D) and research and technology (R&T), are important factors in achieving long-term European strategic autonomy. The present paper analyses this debate from ...

    • 24 Hour Test of a Fuel Cell System for an Autonomous Underwater Vehicle 

      Gilljam, Martin; Weydahl, Helge; Lian, Torleif; Johannessen, Tom Cato; Holm, Sven Ivar; Hasvold, Jon Øistein (2016)
      The Norwegian Defence Research Establishment (FFI) has a long experience with power sources for autonomous underwater vehicles (AUVs). FFI has designed and built a power supply system based on a water-cooled and air-supplied ...

    • FESTER: a propagation experiment, overview and first results 

      Eisele, Christian; Seiffer, Dirk Peter; Stein, Karin; Sucher, Erik; Gunter, Willem H.; February, Faith; Vrahimis, George; Wainman, Carl; Maritz, Benita; Koago, Mokete S.; Eijk, Alexander M. J. van; Iersel, Miranda van; Cohen, Leo H.; Binsbergen, Sven A. van; Heemskerk, H. J. M. (Eric); Sternberg, Armin; Schulte, Helmut; van Rheenen, Arthur; Thomassen, Jan Brede; Brendhagen, Erik; Griffith, Derek (2016)
      A long term field trial called FESTER (First European South African Transmission Experiment) has been conducted by an international collaboration of research organizations during the course of almost one year at False Bay, ...

    • The FESTER field trial 

      Eijk, Alexander M. J. van; Gunter, Willem H.; February, Faith; Maritz, Benita; Vrahimis, George; Koago, Mokete S.; Wainman, Carl; Eisele, Christian; Seiffer, Dirk Peter; Sucher, Erik; Stein, Karin; Iersel, Miranda van; Cohen, Leo H.; Binsbergen, Sven A. van; Heemskerk, H. J. M. (Eric); Sternberg, Armin; Schulte, Helmut; van Rheenen, Arthur; Brendhagen, Erik; Thomassen, Jan Brede; Griffith, Derek (2016)
      An overview is given of the First European – South African Transmission ExpeRiment (FESTER), which took place in South Africa, over the False Bay area, centered around Simon’s Town. The experiment lasted from April 2015 ...

    • Terahertz imaging of composite materials in reflection and transmission mode with a time-domain spectroscopy system 

      Sørgård, Trygve; van Rheenen, Arthur; Haakestad, Magnus W. (2016)
      A fiber-coupled Terahertz time domain spectroscopy (THz-TDS) system based on photoconductive antennas, pumped by a 100-fs fiber laser, has been used to characterize materials in transmission and reflection mode. THz images ...

    • Optical limiting properties of carbon disulfide at 2.05μm wavelength 

      Holmen, Lars Grønmark; Haakestad, Magnus W. (2016)
      Several types of infrared sensors are based on sensitive focal plane arrays. In such sensors, the intensity will typically increase by a factor ~107 at the focal plane, compared to the intensity of the incoming radiation. ...

    • Compact multispectral multi-camera imaging system for small UAVs 

      Torkildsen, Hans Erling; Haavardsholm, Trym Vegard; Opsahl, Thomas Olsvik; Datta, Urmila; Skaugen, Atle; Skauli, Torbjørn (2016)
      Cameras with filters in the focal plane provide the most compact solution for multispectral imaging. A small UAV can carry multiple such cameras, providing large area coverage rate at high spatial resolution. We investigate ...

    • Measurements of high-frequency acoustic scattering from glacially eroded rock outcrops 

      Olson, Derek R.; Lyons, Anthony P.; Sæbø, Torstein Olsmo (2016)
      Measurements of acoustic backscattering from glacially eroded rock outcrops were made off the coast of Sandefjord, Norway using a high-frequency synthetic aperture sonar (SAS) system. A method by which scattering strength ...

    • Disruptive coloration in woodland camouflage: evaluation of camouflage effectiveness due to minor disruptive patches 

      Selj, Gorm Krogh; Heinrich, Daniela (2016)
      We present results from an observer based photosimulation study of generic camouflage patterns, intended for military uniforms, where three near-identical patterns have been compared. All the patterns were prepared with ...

    • Jihadism in Norway: a Typology of Militant Networks in a Peripheral European Country 

      Nesser, Petter; Lia, Brynjar (2016)
      Jihadism in Norway has witnessed a huge shift from consisting primarily of foreign ethnically homogenous networks with a low capacity for mobilization, to the current situation where a loose country-wide network of domestic ...

    • Biological significance of sperm whale responses to sonar: Comparison with anti-predator responses 

      Curé, Charlotte; Isojunno, Saana; Visser, Fleur; Wensveen, Paul J.; Sivle, Lise Doksæter; Kvadsheim, Petter Helgevold; Lam, Frans-Peter A.; Miller, Patrick J.O. (2016)
      A key issue when investigating effects of anthropogenic noise on cetacean behavior is to identify the biological significance of the responses. Predator presence can be considered a natural high-level disturbance stimulus ...

    • Why Putin went to war: ideology, interests and decision-making in the Russian use of force in Crimea and Donbas 

      Bukkvoll, Tor (2016)
      Russia’s 2014 annexation of Crimea, and the country’s prominent role in instigating and supporting an anti-Kiev rebellion in Donbas, surprised the world. This study seeks to explain Russian behaviour in these two cases. ...

    • Source Localization With Multiple Hydrophone Arrays via Matched-Field Processing 

      Tollefsen, Dag; Dosso, Stan E. (2016)
      This paper considers approaches to combining information from multiple arrays in matched-field processing (MFP) for underwater acoustic source localization. The standard approach is to apply conventional MFP for each array ...