Nye registreringer

  • Environmental Change at Deep-Sea Sponge Habitats Over the Last Half Century: A Model Hindcast Study for the Age of Anthropogenic Climate Change 

    Samuelsen, Annette; Schrum, Corinna; Yumruktepe, Veli Caglar; Daewel, Ute; Roberts, Emyr Martyn (Journal article; Peer reviewed, 2022-03-24)
    Deep-sea sponges inhabit multiple areas of the deep North Atlantic at depths below 250 m. Living in the deep ocean, where environmental properties below the permanent thermocline generally change slowly, they may not easily ...
  • Modelling clusters of corporate defaults: Regime-switching models significantly reduce the contagion source 

    Berentsen, Geir Drage; Bulla, Jan; Maruotti, Antonello; Støve, Bård (Journal article; Peer reviewed, 2022)
    In this paper, we report robust evidence that the process of corporate defaults is time-dependent and can be modelled by extending an autoregressive count time series model class via the introduction of regime-switching. ...
  • Estimating the volume of the 1978 Rissa quick clay landslide in Central Norway using historical aerial imagery 

    Robson, Benjamin Aubrey; Hölbling, Daniel; Nielsen, Pål Ringkjøb; Koller, Max (Journal article; Peer reviewed, 2022)
    Quick clay is found across Scandinavia and is especially prominent in south-eastern and central Norway. Quick clay is prone to failure and can cause landslides with high velocities and large run-outs. The 1978 Rissa landslide ...
  • Cutoff Latitudes of Solar Proton Events Measured by GPS Satellites 

    van Hazendonk, Charlotte Maartje; Heino, Erkka Petteri; Jiggens, Piers T.A.; Taylor, Matthew G.G.T.; Partamies, Noora; Mulders, Hjalmar C. J. (Journal article; Peer reviewed, 2022)
    Solar energetic particles (SEPs), one of the main causes of particle radiation in interplanetary space, can disrupt radio communication, induce spacecraft failures and change the heating and cooling rates in the atmosphere ...
  • Selected x86 Low-level Attacks and Mitigations 

    Otterstad, Christian W. (Doctoral thesis, 2017)
    Low-level exploitation is an ongoing security issue. History has shown multiple methods to gain control over, and control, the flow of execution, as well as multiple methods and approaches to mitigate the same issue. This ...
  • Observed Changes in the Arctic Freshwater Outflow in Fram Strait 

    Karpouzoglou, Theodoros; de Steur, Laura; Smedsrud, Lars Henrik; Sumata, Hiroshi (Journal article; Peer reviewed, 2022)
    We have updated time series of liquid fresh water transport (FWT) in the East Greenland Current (EGC) in the western Fram Strait with mooring observations since 2015. Novel data have been used to correct earlier estimates ...
  • Alginate and tunicate nanocellulose composite microbeads – Preparation, characterization and cell encapsulation 

    Kjesbu, Joachim Sebastian; Zaitseva-Zotova, Daria; Sämfors, Sanna; Gatenholm, Paul; Troedsson, Christofer; Thompson, Eric Malcolm; Strand, Berit Løkensgard (Journal article; Peer reviewed, 2022)
    Alginate has been used for decades for cell encapsulation. Cellulose nanofibrils (CNF) from tunicates are desirable in biomedicine due to high molecular weight, purity, crystallinity, and sustainable production. We prepared ...
  • Decoding and constructions of codes in rank and Hamming metric 

    Kadir, Wrya Karim (Doctoral thesis, 2022-05-27)
    As coding theory plays an important role in data transmission, decoding algorithms for new families of error correction codes are of great interest. This dissertation is dedicated to the decoding algorithms for new families ...
  • Quantitative Magnetic Resonance Imaging of Tissue Microvasculature and Microstructure in Selected Clinical Applications 

    Starck, Lea (Doctoral thesis, 2022-06-03)
    This thesis is based on four papers and aims to establish perfusion and diffusion measurements with magnetic resonance imaging (MRI) in selected clinical applications. While structural imaging provides invaluable geometric ...
  • Problem solving in basic physics: Effective self-explanations based on four elements with support from retrieval practice 

    Gjerde, Vegard; Paulsen, Vegard Havre; Holst, Bodil; Kolstø, Stein Dankert (Journal article; Peer reviewed, 2022)
    Self-explanation, a learning strategy where students explain to themselves the steps taken in a worked example, is an effective learning strategy in early cognitive skill acquisition. However, many physics students produce ...
  • Order-Related Problems Parameterized by Width 

    Arrighi, Emmanuel (Doctoral thesis, 2022-05-25)
    In the main body of this thesis, we study two different order theoretic problems. The first problem, called Completion of an Ordering, asks to extend a given finite partial order to a complete linear order while respecting ...
  • Winters are changing: snow effects on Arctic and alpine tundra ecosystems 

    Rixen, Christian; Høye, Toke Thomas; Macek, Petr; Aerts, Rien; Alatalo, Juha; Andeson, Jill; Arnold, Pieter; Barrio, Isabel C.; Bjerke, Jarle W.; Björkman, Mats P.; Blok, Daan; Blume-werry, Gesche; Boike, Julia; Bokhorst, Stef; Carbognani, Michele; Christiansen, Casper Tai; Convey, Peter; Cooper, Elisabeth J.; Cornelissen, J. Hans C.; Coulson, Stephen; Dorrepaal, Ellen; Elberling, Bo; Elmendorf, Sarah; Elphinstone, Cassandra; Forte, T'ai Gladys Whittingham; Frei, Esther R.; Geange, Sonya Rita; Gehrmann, Friederike; Gibson, Casey; Grogan, Paul; Rechsteiner, Aud Helen Halbritter; Harte, John; Henry, Greg H.R.; Inouye, David W.; Irwin, Rebecca; Jespersen, Gus; Jónsdóttir, Ingibjörg Svala; Jung, Ji Young; Klinges, David H.; Kudo, Gaku; Lämsä, Juho; Lee, Hanna; Lembrechts, Jonas; Lett, Signe; Lynn, Joshua Scott; Mann, Hjalte Mads; Mastepanov, Mikhail; Morse, Jennifer; Myers-Smith, Isla; Olofsson, Johan; Semenchuk, Philipp; Vandvik, Vigdis (Journal article; Peer reviewed, 2022)
    Snow is an important driver of ecosystem processes in cold biomes. Snow accumulation determines ground temperature, light conditions and moisture availability during winter. It also affects the growing season’s start and ...
  • Modelling of gas hydrates in sedimentary systems : Methane hydrates impact on flow through porous media 

    Bello Palacios, German Alejandro (Doctoral thesis, 2022-04-06)
    In nature, gas hydrates exist in areas of permafrost and in shallow subsurface sediments at ocean depths of more than 300-500 metres. In terms of the Sustainable Development Goals (SDG) of the United Nations, better ...
  • Relative Spatial Positions of Tryptophan and Cationic Residues in Helical Membrane-active Peptides Determine Their Cytotoxicity 

    Rekdal, Øystein; Haug, Bengt Erik; Kalaaji, manar; Hunter, Howard N.; Lindin, Inger; Israelsson, Ingrid; Solstad, Terese; Yang, Nannan; Brandl, Martin; Mantzilas, Dimitrios; Vogel, Hans J. (Journal article; Peer reviewed, 2012)
    The cytotoxic activity of 10 analogs of the idealized amphipathic helical 21-mer peptide (KAAKKAA)3, where three of the Ala residues at different positions have been replaced with Trp residues, has been investigated. The ...
  • Efficient Monte Carlo simulation reveals significant multiple scattering errors in underwater angular scattering measurements 

    Ugulen, Håvard Stavn; Sandven, Håkon; Hamre, Børge; Kristoffersen, Arne Skodvin; Sætre, Camilla (Journal article; Peer reviewed, 2022)
    Multiple scattering can severely affect the accuracy of optical instrumentation. Variance reduction methods have been implemented to improve a Monte Carlo model developed to simulate volume scattering functions measured ...
  • Rotational effects on exchange flows across a submerged sill 

    Cuthbertson, A.; Berntsen, Jarle Peder; Laanearu, J.; Asplin, Magdeli (Journal article; Peer reviewed, 2021)
    This paper presents new laboratory-scale numerical simulations of density-driven exchange flows generated across an idealised, submerged sill obstruction under both non-rotating and rotating frames of reference using the ...
  • Hidden semi-Markov-switching quantile regression for time series 

    Maruotti, Antonello; Petrella, Lea; Sposito, Luca (Journal article; Peer reviewed, 2021)
    A hidden semi-Markov-switching quantile regression model is introduced as an extension of the hidden Markov-switching one. The proposed model allows for arbitrary sojourn-time distributions in the states of the Markov-switching ...
  • Dispersive Estimates for Full Dispersion KP Equations 

    Selberg, Sigmund; Pilod, Didier Jacques Francois; Saut, Jean-Claude; Temesgen, Achenef Tesfahun (Journal article; Peer reviewed, 2021)
    We prove several dispersive estimates for the linear part of the Full Dispersion Kadomtsev–Petviashvili introduced by David Lannes to overcome some shortcomings of the classical Kadomtsev–Petviashvili equations. The proof ...
  • Underwater Ultrasonic Transducer Technology. Construction, Characterization and Finite-Element Modelling. 

    Prøytz, Celine (Master thesis, 2022-03-30)
    The main objective of this thesis is to construct and characterize ultrasonic transducers. The transducers are constructed to get the information needed for finite element simulations with the wanted accuracy since commercial ...

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