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  • Statistical Temporal Variations in the Auroral Electrojet Estimated With Ground Magnetometers in Fennoscandia 

    Walker, Simon; Laundal, Karl Magnus; Reistad, Jone Peter; Ohma, Anders; Hatch, Spencer Mark (Journal article; Peer reviewed, 2023)
    We present the implementation of an improved technique to coherently model the high-latitude ionospheric equivalent current. Using a fixed selection of 20 ground magnetometers in Fennoscandia, we present a method based on ...
  • Deciphering Spatio-Temporal Variations in the Auroral Ionosphere using Magnetometer Data 

    Walker, Simon James (Doctoral thesis, 2024-03-22)
    Den polare ionosfæren er et dynamisk plasma-miljø dominert av koblingen mellom solvinden og jordens magnetosfære. Nordlyset, plasma-bevegelsen og elektriske strømmer i ionosfæren er skalert og drevet av dagsidekoblingen ...
  • An organ deformation model using Bayesian inference to combine population and patient-specific data 

    Rørtveit, Øyvind Lunde; Hysing, Liv Bolstad; Stordal, Andreas Størksen; Pilskog, Sara Margareta Cecilia (Journal article; Peer reviewed, 2023)
    Objective. Organ deformation models have the potential to improve delivery and reduce toxicity of radiotherapy, but existing data-driven motion models are based on either patient-specific or population data. We propose to ...
  • Minimal sterile neutrino dark matter 

    Bringmann, Torsten; Depta, Paul Frederik; Hufnagel, Marco; Kersten, Jörn; Ruderman, Joshua T.; Schmidt-Hoberg, Kai (Journal article; Peer reviewed, 2023)
    We propose a novel mechanism to generate sterile neutrinos νs in the early Universe, by converting ordinary neutrinos να in scattering processes νsνα→νsνs. After initial production by oscillations, this leads to an exponential ...
  • Fluorescence intensity and fluorescence lifetime measurements of various carbon dots as a function of pH 

    Szapoczka, Wiktoria Karolina; Truskewycz, Adam Leo; Skodvin, Tore; Holst, Bodil; Thomas, Peter James (Journal article; Peer reviewed, 2023)
    Measurement and monitoring of pH are essential in both the industry and academia. It is therefore important to continue developing novel, low-cost pH sensors that provide increased accuracy over long periods of time. ...
  • Pore-scale spatiotemporal dynamics of microbial-induced calcium carbonate growth and distribution in porous media 

    Liu, Na; Haugen, Malin; Benali, Benyamine; Landa-Marbán, David; Fernø, Martin (Journal article; Peer reviewed, 2023)
    The naturally occurring bio-geochemical microbial-induced calcium carbonate precipitation (MICP) process is an eco-friendly technology for rehabilitating construction materials, reinforcement of soils and sand, heavy metals ...
  • Efficacy and User Experience of a Novel X-Ray Shield on Operator Radiation Exposure during Cardiac Catheterization: A Randomized Controlled Trial 

    Davidsen, Cedric; Ytre-Hauge, Kristian Smeland; Samnøy, Andreas Tefre; Vikenes, Kjell; Lancellotti, Patrizio; Tuseth, Vegard (Journal article; Peer reviewed, 2023)
    BACKGROUND: Radiation shielding is mandatory during cardiac catheterization, but there is a need to improve efficacy and ease of use. METHODS: The aim of the study was to assess the shielding effect and user feedback ...
  • Kinetic model of resonant nanoantennas in polymer for laser induced fusion 

    Papp, Istvan; Bravina, Larissa; Csete, Mária; Kumari, Archana; Mishustin, Igor N.; Motornenko, Anton; Rácz, Péter; Satarov, Leonid M.; Stöcker, Horst; Strottman, Daniel D:; Szenes, András; Vass, Dávid; Szokol, Ágnes Nagyné; Kámán, Judit; Bonyár, Attila; Biró, Tamás S.; Csernai, László Pál; Kroó, Norbert (Journal article; Peer reviewed, 2023)
    Studies of resilience of light-resonant nanoantennas in vacuum are extended to consider the case of polymer embedding. This modifies the nanoantenna’s lifetime and resonant laser pulse energy absorption. The effective ...
  • Improving photon and proton radiotherapy of locally advanced non-small cell lung cancer 

    Fjellanger, Kristine (Doctoral thesis, 2024-03-19)
    Pasienter med lokalavansert ikke-småcellet lungekreft (LA-NSCLC) har svulster som er store, vokser inn i andre strukturer i brystkassen, og/eller har spredt seg til regionale lymfeknuter. Disse pasientene er som oftest ...
  • Seasonality and drivers of water column optical properties on the northwestern Barents Sea shelf 

    Sandven, Håkon; Hamre, Børge; Petit, Tristan; Röttgers, Rudiger; Liu, Hongbo; Granskog, Mats (Journal article; Peer reviewed, 2023)
    Hydrographic and bio-optical measurements were conducted along a south–north transect on the northwestern Barents Sea shelf from early spring to late summer in 2021. Strong climate change manifestations observed in this ...
  • Background removal from global auroral images: Data driven dayglow modelling 

    Ohma, Anders; Madelaire, Michael; Laundal, Karl Magnus; Reistad, Jone Peter; Hatch, Spencer Mark; Gasparini, Sara; Walker, Simon (Journal article; Peer reviewed, 2023)
    Global images of auroras obtained by cameras on spacecraft are a key tool for studying the near-Earth environment. However, the cameras are sensitive not only to auroral emissions produced by precipitating particles, but ...
  • Pore-scale study of microbial hydrogen consumption and wettability alteration during underground hydrogen storage 

    Liu, Na; Kovscek, Anthony R.; Fernø, Martin Anders; Dopffel, Nicole (Journal article; Peer reviewed, 2023)
    Hydrogen can be a renewable energy carrier and is suggested to store renewable energy and mitigate carbon dioxide emissions. Subsurface storage of hydrogen in salt caverns, deep saline formations, and depleted oil/gas ...
  • Performance of the electromagnetic pixel calorimeter prototype Epical-2 

    Alme, Johan; Barthel, Rene; van Bochove, Aart; Borshchov, Vyacheslav; Bosley, Robert; van den Brink, A.; Broeils, E.; Büsching, H.; Eikeland, Viljar Nilsen; Grøttvik, Ola Slettevoll; Han, Y.; van der Kolk, N.; Kim, J.; Kim, T.; Kwon, Y.; Mager, M.; Malik, Qasim Waheed; Okkinga, E.; Park, T.; Peitzmann, T.; Pliquett, F.; Protsenko, M.; Reidt, F.; van Rijk, S.; Røed, Ketil; Rogoschinski, T.; Röhrich, Dieter; Rossewij, M.; Ruis, G.; Solheim, Emilie Haugland; Tymchuk, I.; Ullaland, Kjetil; Watson, N.; Yokoyama, H. (Journal article; Peer reviewed, 2023)
    The first evaluation of an ultra-high granularity digital electromagnetic calorimeter prototype using 1.0–5.8 GeV/c electrons is presented. The 25 × 106 pixel detector consists of 24 layers of ALPIDE CMOS MAPS sensors, ...
  • Unusual shrinkage and reshaping of Earth’s magnetosphere under a strong northward interplanetary magnetic field 

    Wang, Xiang-Yu; Zhang, Qing-He; Wang, Chi; Zhang, Yong-Liang; Tang, Bin-Bin; Xing, Zan-Yang; Oksavik, Kjellmar; Lyons, Larry R.; Lockwood, Michael; Zong, Qiu-Gang; Li, Guo-Jun; Liu, Jing; Ma, Yu-Zhang; Wang, Yong (Journal article; Peer reviewed, 2023)
    The Earth’s magnetosphere is the region of space where plasma behavior is dominated by the geomagnetic field. It has a long tail typically extending hundreds of Earth radii (RE) with plentiful open magnetic fluxes threading ...
  • Towards Neural Charged Particle Tracking in Digital Tracking Calorimeters With Reinforcement Learning 

    Kortus, Tobias; Keidel, Ralf; Gauger, Nicolas R.; Aehle, Max; Alme, Johan; Barnaföldi, Gergely Gábor; Bodova, Tea; Borshchov, Vyacheslav; Vanden Brink, Anthony; Chaar, Mamdouh; Eikeland, Viljar Nilsen; Feofilov, Gregory; Garth, Christoph; Genov, Georgi Yordanov; Grøttvik, Ola Slettevoll; Helstrup, Håvard; Igolkin, Sergey; Kobdaj, Chinorat; Leonhardt, Viktor; Mehendale, Shruti Vineet; Mulawade, Raju Ningappa; Odland, Odd Harald; O'Neill, George; Papp, Gabor; Peitzmann, Thomas; Pettersen, Helge Egil Seime; Piersimoni, Pierluigi; Protsenko, Maksym; Rauch, Max Philip; Rehman, Attiq Ur; Richter, Matthias; Röhrich, Dieter Rudolf Christian; Santana, Joshua; Schilling, Alexander; Seco, Joao; Songmoolnak, Arnon; Sudár, Ákos; Salie, Jarle Rambo; Tambave, Ganesh Jagannath; Tymchuk, Ihor; Ullaland, Kjetil; Varga-Kofarago, Monika; Volz, Lennart; Wagner, Boris; Wendzel, Steffen; Wiebel, Alexander; Xiao, Renzheng; Yang, Shiming; Yokoyama, Hiroki; Zillien, Sebastian (Journal article; Peer reviewed, 2023)
    We propose a novel technique for reconstructing charged particles in digital tracking calorimeters using reinforcement learning aiming to benefit from the rapid progress and success of neural network architectures without ...
  • Visualization of Unsteady Flow in a Multistage Helico-Axial Pump 

    Gundersen, Ted Ørjan Seim; Moënne-Loccoz, Victor; Dupoiron, Marine; Torbergsen, Erik Andre; Balakin, Boris; Arntzen, Bjørn Johan; Hoffmann, Alex Christian (Journal article, 2023)
    Helico-axial pumps are designed to pump mixtures of gas and liquid. Secondary flows and rotor-stator interactions are known to add complexity to the flow field in unshrouded axial-flow turbomachinery. Here we use a high-speed ...
  • Neural network approach for correction of multiple scattering errors in the LISST-VSF instrument 

    Ugulen, Håvard Stavn; Koestner, Daniel Warren; Sandven, Håkon Johan; Hamre, Børge; Kristoffersen, Arne Skodvin; Sætre, Camilla (Journal article; Peer reviewed, 2023)
    The LISST-VSF is a commercially developed instrument used to measure the volume scattering function (VSF) and attenuation coefficient in natural waters, which are important for remote sensing, environmental monitoring and ...
  • Sub-resolution contrast in neutral helium microscopy through facet scattering for quantitative imaging of nanoscale topographies on macroscopic surfaces 

    Eder, Sabrina Daniela; Fahy, Adam; Barr, Matthew G.; Manson, Joseph R.; Holst, Bodil; Dastoor, Paul C. (Journal article; Peer reviewed, 2023)
    Nanoscale thin film coatings and surface treatments are ubiquitous across industry, science, and engineering; imbuing specific functional or mechanical properties (such as corrosion resistance, lubricity, catalytic activity ...
  • Exploring the use of nanofluids in pump-free systems for solar thermal applications 

    Kosinska, Anna Dorota; Balakin, Boris; Kosinski, Pawel Jan (Journal article; Peer reviewed, 2023)
    By using nanofluids as a working fluid in pump-free designs, thermal energy systems can become more efficient and have reduced maintenance costs, ultimately extending the system’s lifespan. In this paper, our goal is to ...
  • Low Power Giga Bit Transceiver (lpGBT) Test-Suite 

    Jensen, Sander (Master thesis, 2023-12-20)
    The ALICE detector, one of the key instruments at CERN's LHC, is dedicated to capturing and measuring the properties of particles generated in high-energy particle collisions. To enhance its capabilities for studying these ...

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