Browsing Fysisk institutt by Title

Now showing items 574-593 of 3672

  • DCE-MRI Pharmacokinetic Model Optimization and Implications for Brain Cancer Imaging 
    Johansen, Ole Gunnar (Master thesis / Masteroppgave, 2018)
    Dynamic contrast enhanced (DCE) MRI is increasingly used for tumor imaging, both for clinical use and research. However, existing DCE-based methods have limitations with regard to standardization and reproducibility, ...
  • Decameter scale irregularities in the polar ionosphere 
    Lie, Henrik Bjoner (Master thesis / Masteroppgave, 2019)
    From the Sun to the Earth’s upper atmosphere, particles and energy are trans- ported through several key processes. Many of these we know well, and some we are still learning about. In this thesis we will study one of the ...
  • Decay spectroscopy of 253 No using the GABRIELA setup 
    Hagen, Trine Wiborg (Master thesis / Masteroppgave, 2010)
    Et av de mest spennende og minst kjente områdene innenfor eksperimentell kjernefysikk, er spektroskopi av kjerner som nærmer seg stabilitetsgrensen, som for eksempel for kjerner med høy masse og ladning. GABRIELA er et ...
  • Decay spectroscopy of Os 171,172 and Ir 171,172,174 
    Zhang, W.; Cederwall, B.; Doncel, M.; Aktas, O.; Ertoprak, A.; Qi, C.; Grahn, T.; Nara Singh, Singh; Cullen, D.M.; Hodge, D.; Giles, M.; Stolze, S.; Auranen, K.; Badran, H.; Braunroth, T.; Calverley, T.; Cox, D.M.; Fang, Y.D.; Greenlees, P.T.; Hilton, J.; Ideguchi, E.; Julin, R.; Juutinen, S.; Kumar Raju, Raju; Leino, M.; Li, H.; Liu, H.; Matta, S.; Subramaniam, P.; Modamio, Victor; Pakarinen, J.; Papadakis, P.; Partanen, J.; Petrache, C.M.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sarén, J.; Scholey, C.; Sorri, J.; Taylor, M.J.; Uusitalo, J.; Valiente-Dobón, J.J. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
  • Decreased tissue stiffness in glioblastoma by MR elastography is associated with increased cerebral blood flow 
    Svensson, Siri Fløgstad; Fuster i Garcia, Elies; Latysheva, Anna; Fraser-Green, Jorunn; Nordhøy, Wibeke; Darwish, Omar Isam; Hovden, Ivar Thokle; Holm, Sverre; Vik-Mo, Einar O.; Sinkus, Ralph; Emblem, Kyrre Eeg (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Purpose Understanding how mechanical properties relate to functional changes in glioblastomas may help explain different treatment response between patients. The aim of this study was to map differences in biomechanical ...
  • Deep Learning of Large Scale Biophysical Neural Models 
    Amundsen, Sebastian (Master thesis / Masteroppgave, 2023)
    In recent times, there have been developed biophysical advanced neuron models that accurately create detailed representations of the input-output relationship found in real neurons. However, these models require a lot of ...
  • Deep learning to estimate power output from breathing 
    Husom, Erik Johannes Bjørnson L.G. (Master thesis / Masteroppgave, 2021)
    Activity tracking devices are widely used for monitoring and measuring different aspects of physical activity, such as heart rate, speed, energy expenditure and power output. Breathing variables like ventilation and oxygen ...
  • Deep learning-based auto-delineation of gross tumour volumes and involved nodes in PET/CT images of head and neck cancer patients 
    Moe, Yngve Mardal; Grøndahl, Aurora Rosvoll; Tomic, Oliver; Dale, Einar; Malinen, Eirik; Futsæther, Cecilia Marie (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Abstract Purpose Identification and delineation of the gross tumour and malignant nodal volume (GTV) in medical images are vital in radiotherapy. We assessed the applicability of convolutional neural ...
  • DEEP LEARNING-BASED SEGMENTATION OF WHITE MATTER HYPERINTENSITIES IN MAGNETIC RESONANCE IMAGES: AN EARLY MARKER FOR DEVELOPMENT OF ALZHEIMER'S DISEASE 
    Røvang, Martin Soria (Master thesis / Masteroppgave, 2021)
    Alzheimer's disease is the most common cause of dementia, and the disease can be characterized by aggregation of the protein Amyloid-beta Amyloid-beta is poisonous for the nerve cells and forms pathologic lesions that can ...
  • Deep reinforcement learning for quantum Szilard engine optimization 
    Sørdal, Vegard Børve; Bergli, Joakim (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Machine learning techniques based on artificial neural networks have been successfully applied to solve many problems in science. One of the most interesting domains of machine learning, reinforcement learning, has a natural ...
  • Deep-level transient spectroscopy system with a response time in the microsecond time frame 
    Matre, Christoffer (Master thesis / Masteroppgave, 2019)
  • Defect and transport in acceptor-doped KBaPO4 and BaSO4 
    Nguyen, Kevin (Master thesis / Masteroppgave, 2017)
  • Defect annealing kinetics in ZnO implanted with Zn substituting elements: Zn interstitials and Li redistribution 
    Azarov, Alexander; Aarseth, Bjørn Lupton; Vines, Lasse; Hallen, Anders; Monakhov, Eduard; Kuznetsov, Andrej (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    It is known that the behavior of residual Li in ion implanted ZnO depends on the preferential localization of the implants, in particular, forming characteristic Li depleted or Li pile-up regions for Zn or O sublattice ...
  • Defect evolution and impurity migration in Na-implanted ZnO 
    Neuvonen, Pekka T.; Vines, Lasse; Venkatachalapathy, Vishnukanthan; Zubiaga, Asier; Tuomisto, Filip; Hallén, Anders; Svensson, Bengt G.; Kuznetsov, Andrej Yu. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
    Secondary ion mass spectrometry (SIMS) and positron annihilation spectroscopy (PAS) have been applied to study impurity migration and open volume defect evolution in Na+ implanted hydrothermally grown ZnO samples. In ...
  • Defect level in κ-Ga2O3 revealed by thermal admittance spectroscopy 
    Langørgen, Amanda; Frodason, Ymir Kalmann; Karsthof, Robert Michael; Von Wenckstern, Holger; Jensen, Ingvild Julie Thue; Vines, Lasse; Grundmann, Marius (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Defects in pulsed-laser deposition grown have been investigated using thermal admittance spectroscopy and secondary ion mass spectrometry (SIMS). A film was grown on either a tin-doped indium oxide or an aluminum-doped ...
  • Defect self-propulsion in active nematic films with spatially varying activity 
    Rønning, Jonas; Marchetti, M. Cristina; Angheluta, Luiza (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We study the dynamics of topological defects in active nematic films with spatially varying activity and consider two set-ups: (i) a constant activity gradient and (ii) a sharp jump in activity. A constant gradient of ...
  • Defect stabilization and reverse annealing in ZnO implanted with nitrogen at room and cryogenic temperature 
    Azarov, Alexander; Wendler, Elke; Monakhov, Edouard; Svensson, Bengt Gunnar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Despite the fact that nitrogen is a potential acceptor dopant and one of the most studied elements in ZnO, lacking understanding of associated defects and their thermal evolution limits realization of reliable p-type doping ...
  • Defects and transport in fluorite related materials Nd2Ce2O7 and Gd2Ce2O7 
    Cheng, Shiyang (Master thesis / Masteroppgave, 2012)
    In this master thesis, defects and transport properties in fluorite related materials Ln2Ce2O7 (Ln=Nd, Gd) were investigated by electrical measurements and thermogravimetry. Nd2-xCaxCe2O7-δ (x=0, 0.05, 0.1, 0.2) and ...
  • Defects and Transport in RE2WO6 
    Pan, Jie (Master thesis / Masteroppgave, 2012)
  • Defects and Transport in Ti-doped Ca2AlNbO6 and Ca2YNbO6 
    Fahle, Ilene (Master thesis / Masteroppgave, 2012)
    The exploration of double perovskites has led to the introduction of a broad range of high temperature proton conductors with varying conduction properties. To further investigate these materials, acceptor doped Ca2AlNbO6 ...