Browsing Fysisk institutt by Title

Now showing items 3556-3575 of 3667

  • Unique particle beams and energies at CERN applied to radiation testing of electronics 
    Wyrwoll, Vanessa (Doctoral thesis / Doktoravhandling, 2022)
    The radiation environment in space poses unique challenges to the successful operation of electronic components exposed to it. Hence, it is important to test the devices sufficiently before integrating them in space missions. ...
  • Universal radiation tolerant semiconductor 
    Azarov, Alexander; García Fernández, Javier; Zhao, Junlei; Djurabekova, Flyura; He, Huan; He, Ru; Prytz, Øystein; Vines, Lasse; Bektas, Umutcan; Chekhonin, Paul; Klingner, Nico; Hlawacek, Gregor; Kuznetsov, Andrej (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract Radiation tolerance is determined as the ability of crystalline materials to withstand the accumulation of the radiation induced disorder. Nevertheless, for sufficiently high fluences, in all by far known ...
  • Universality in the AC Conductance of Keratinized Tissues 
    Abie, Sisay Mebre (Master thesis / Masteroppgave, 2014)
    The overall aim of the studies in this thesis is to investigate the universality nature of the conductivity of biological materials and the conduction mechanism using impedance spectroscopy measurement. Universality is a ...
  • Universality of modular symmetries in two-dimensional magneto transport 
    Olsen, Kristian Stølevik; Limseth, Henrik Sverre; Lutken, Carsten Andrew (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We analyze experimental quantum Hall data from a wide range of different materials, including semiconducting heterojunctions, thin films, surface layers, graphene, mercury telluride, bismuth antimonide, and black phosphorus. ...
  • Unraveling electronic band structure of narrow-bandgap p-n nanojunctions in heterostructured nanowires 
    Zamani, Reza R.; Hage, Fredrik S.; Eljarrat, Alberto; Namazi, Luna; Ramasse, Quentin M.; Dick, Kimberly A. (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
    Direct comparison of bandgaps of GaSb zinc blende and wurtzite polytypes (0.75 and 0.84 eV, respectively) by means of valence electron energy-loss spectroscopy (VEELS) in a transmission electron microscope (TEM).
  • Unruh effect in heavy ion collisions 
    Teslyk, Maksym; Zabrodin, Evgeny; Bravina, Larissa (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We apply the idea of the Unruh effect to the description of particle production in relativistic heavy ion collisions. Because the full information about all particles is needed, we employ the spectra of hadrons generated ...
  • Unruh Entropy of a Schwarzschild Black Hole 
    Teslyk, Maksym; Teslyk, Olena; Bravina, Larissa; Zabrodin, Evgeny (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    The entropy produced by Unruh radiation is estimated and compared to the entropy of a Schwarzschild black hole. We simulate a spherical system of mass M by a set of Unruh horizons and estimate the total entropy of the ...
  • The Unstructured Particle-In-Cell Method with Applications for Objects in Ionospheric Plasmas 
    Marholm, Sigvald (Doctoral thesis / Doktoravhandling, 2020)
    Spaceborn instruments such as the Langmuir probe are essential to understand our own ionosphere. In this dissertation we explore the behaviour of such instruments through computer simulations, and find that some of the ...
  • Unveiling the strong interaction among hadrons at the LHC 
    Acharya, Shreyasi; Adamová, Dagmar; Adler, Alexander; Adolfsson, Jonatan; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, Shafiq F.; Alme, Johan; Altenkaemper, Lucas; Djuvsland, Øystein; Eikeland, Viljar Nilsen; Ersdal, Magnus Rentsch; Fionda, Fiorella Maria Celeste; Grøttvik, Ola Slettevoll; Lofnes, Ingrid Mckibben; Nystrand, Joakim; Rehman, Attiq Ur; Røhrich, Dieter; Tambave, Ganesh Jagannath; Ullaland, Kjetil; Wagner, Boris; Yang, Shiming; Yuan, Shiming; Zhou, Zhuo; Arsene, Ionut Cristian; Dordic, Olja; Lardeux, Antoine Xavier; Mahmood, Sohail Musa; Malik, Qasim Waheed; Neagu, Alexandra; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Nesbø, Simon Voigt; Storetvedt, Maksim Melnik; Langøy, Rune; Lien, Jørgen André; Ahn, Sang Un; Akbar, Zaenai; Akindinov, Alexander; Al-Turany, Mohammed; Alam, Sk Noor; ALICE, Collaboration (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Abstract One of the key challenges for nuclear physics today is to understand from first principles the effective interaction between hadrons with different quark content. First successes have been achieved using techniques ...
  • Upbend and M1 scissors mode in neutron-rich nuclei — consequences for r-process (n,gamma) reaction rates 
    Larsen, Ann-Cecilie; Goriely, Stephane; Bernstein, L. A.; Bleuel, D. L.; Bracco, A.; Brown, B. A.; Camera, F.; Eriksen, Tomas Kvalheim; Frauendorf, Stefan; Giacoppo, Francesca; Guttormsen, Magne Sveen; Görgen, Andreas; Harrisopulos, Sotirios; Leoni, S.; Liddick, S. N.; Naqvi, F.; Nyhus, Hilde-Therese; Rose, Sunniva Johanne; Renstrøm, Therese; Schwengner, Ronald; Siem, Sunniva; Spyrou, A.; Tveten, Gry Merete; Voinov, Alexander; Wiedeking, Mathis (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    An enhanced probability for low-energy γ-emission (upbend, Eγ < 3 MeV) at high excitation energies has been observed for several light and medium-mass nuclei close to the valley of stability. Also the M1 scissors mode seen ...
  • Upconverting nanorods in silica film for use in CO2 -optodes: Synthesis and characterization of β-NaYF4:Yb,Er 
    Killingland, Live Karine Næss (Master thesis / Masteroppgave, 2015)
    The upconverting material of β-NaYF4:Yb,Er powder has been successfully made by a solvothermal syntheses method. The morphology of the main sample is hexagonal rods of about 1.2 µm in length. The samples show visible green ...
  • Upgrade of the ALICE central barrel tracking detectors: ITS and TPC 
    Gasik, P.; Acharya, Shreyasi; Acosta, Fernando T.; Adamová, Dagmar; Adolfsson, Jonatan; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Neelima; Ahammed, Zubayer; Alme, Johan; Altenkaemper, Lucas; Djuvsland, Øystein; Ersdal, Magnus Rentsch; Fionda, Fiorella Maria Celeste; Nystrand, Joakim; Rehman, Attiq Ur; Røhrich, Dieter; Tambave, Ganesh Jagannath; Ullaland, Kjetil; Wagner, Boris; Zhou, Zhuo; Arsene, Ionut Cristian; Bätzing, Paul Christoph; Dordic, Olja; Lardeux, Antoine Xavier; Lindal, Svein; Mahmood, Sohail Musa; Malik, Qasim Waheed; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Hetland, Kristin Fanebust; Kileng, Bjarte; Nesbø, Simon Voigt; Storetvedt, Maksim Melnik; Helstrup, Håvard; Langøy, Rune; Lien, Jørgen André; Ahn, Sang Un; Aiola, Salvatore; Akindinov, Alexander; Al-Turany, Mohammad; Alam, Sk Noor; Albuquerque, D. S. D.; Aleksandrov, Dmitry; Alessandro, Bruno; ALICE, Collaboration (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    The ALICE Collaboration will undertake a major upgrade of the detector apparatus during the second LHC Long Shutdown LS2 (2019–2020) in view of the Runs 3 and 4 (2021–2029). The objective of the upgrade is two-fold: i) an ...
  • Upper Primary Students’ Views vis-à-vis Scientific Reasoning Progress Levels in Physics 
    Abate, Tsedeke; Kassa, Michael; Angell, Carl (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    The purpose of this study was to explore grade eight students’ views in terms of different scientific reasoning progress levels. To explore students’ views, phenomenographic study was used. The qualitative analysis of ...
  • Use of ionizing radiation in a Norwegian cohort of children with congenital heart disease: imaging frequency and radiation dose for the Health Effects of Cardiac Fluoroscopy and Modern Radiotherapy in Pediatrics (HARMONIC) study 
    Afroz, Susmita; Østerås, Bjørn Helge; Thevathas, Utheya Salini; Døhlen, Gaute; Stokke, Caroline; Robsahm, Trude Eid; Olerud, Hilde Merete (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Background: The European-funded Health Effects of Cardiac Fluoroscopy and Modern Radiotherapy in Pediatrics (HAR- MONIC) project is a multicenter cohort study assessing the long-term effects of ionizing radiation in patients ...
  • Using computational essays to foster disciplinary epistemic agency in undergraduate science 
    Odden, Tor Ole Bigton; Silvia, Devin W.; Malthe-Sørenssen, Anders (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    This article reports on a study investigating how computational essays can be used to help students in higher education STEM take up disciplinary epistemic agency—cognitive control and responsibility over one's own learning ...
  • Using computational essays to scaffold professional physics practice 
    Odden, Tor Ole; Malthe-Sørenssen, Anders (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    This article describes a curricular innovation designed to help students experience authentic physics inquiry with an emphasis on computational modeling and scientific communication. The educational design centers on a new ...
  • Using Deep Reinforcement Learning for Active Flow Control 
    Holm, Marius (Master thesis / Masteroppgave, 2020)
    We apply deep reinforcement learning (DRL) to reduce and increase the drag of a 2-dimensional wake flow around a cluster of three equidistantly spaced cylinders, known as the fluidic pinball. The flow is controlled by ...
  • Using Fault Network Characteristics to Predict Local and Global Damage Accumulation 
    Cabrera, Gabriel Sigurd (Master thesis / Masteroppgave, 2021)
    There are many complex factors that govern the development of fracture networks and the timing of macroscopic failure in rock. So far, we lack a unifying theory to predict fracture development in heterogeneous rock, and ...
  • Using Machine Learning to Predict the Effects of Deep Brain Stimulation on Axonal PathwaysRestricted Access 
    Strand, Karianne (Master thesis / Masteroppgave, 2023)
  • Using Machine Learning to Recreate Signals from the Primary Visual Cortex of Mice 
    Asprusten, Markus Leira (Master thesis / Masteroppgave, 2020)
    Generative adversarial networks (GAN) have received much attention lately for its use with images and has been shown to be able to create extremely realistic images of different kinds of objects. Even though its use in ...