Browsing Det matematisk-naturvitenskapelige fakultet by Title

Now showing items 412-431 of 838

  • Inter-diffusion across a direct p-n heterojunction of Li-doped NiO and Al-doped ZnO 
    Desissa, Temesgen D.; Haugsrud, Reidar; Wiik, Kjell; Norby, Truls Eivind (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    We herein report inter-diffusion across the interface between p-type Ni0.98Li0.02O and n-type Zn0.98Al0.02O for various applications including p-n-heterojunction diodes and oxide thermoelectrics. Diffusion couples were ...
  • Interactions between demography and environmental effects are important determinants of population dynamics 
    Gamelon, Marlène; Grøtan, Vidar; Nilsson, Anna; Engen, Steinar; Hurrell, James W.; Jerstad, Kurt; Phillips, Adam S.; Røstad, Ole Wiggo; Slagsvold, Tore; Walseng, Bjørn; Stenseth, Nils Christian; Sæther, Bernt-Erik (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Climate change will affect the population dynamics of many species, yet the consequences for the long-term persistence of populations are poorly understood. A major reason for this is that density-dependent feedback effects ...
  • Interplay of the disorder and strain in gallium oxide 
    Azarov, Alexander; Venkatachalapathy, Vishnukanthan; Karaseov, Platon; Titov, Andrei; Karabeshkin, Konstantin; Struchkov, Andrei; Kuznetsov, Andrej (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract Ion irradiation is a powerful tool to tune properties of semiconductors and, in particular, of gallium oxide (Ga 2 O 3 ) which is a promising ultra-wide bandgap semiconductor exhibiting phase instability for high ...
  • Interplay of vacancies, hydrogen, and electrical compensation in irradiated and annealed n-type β-Ga2O3 
    Karjalainen, Antti; Weiser, Philip Michael; Makkonen, I.; Reinertsen, Vilde Mari; Vines, Lasse; Tuomisto, Filip (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Positron annihilation spectroscopy, Fourier transform-infrared absorption spectroscopy, and secondary ion mass spectrometry have been used to study the behavior of gallium vacancy-related defects and hydrogen in deuterium ...
  • Interplay of valence states and magnetic interactions in the perovskite system LaNi1–xRhxO3 
    Fjellvåg, Asbjørn Slagtern; Fjellvåg, Øystein; Kumar, Susmit; Ruud, Amund; Sjåstad, Anja Olafsen (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
    We report on the structural, magnetic and electronic properties of Rh substituted LaNiO3, LaNi1–xRhxO3 (0 ​≤ ​x ​≤ ​1). Increased Rh contents are associated with increased structural distortion, and we observe a phase ...
  • Interpretation of hydrogen-assisted fatigue crack propagation in BCC iron based on dislocation structure evolution around the crack wake 
    Birenis, Domas; Ogawa, Yuhei; Matsunaga, Hisao; Takakuwa, Osamu; Yamabe, Junichiro; Prytz, Øystein; Thøgersen, Annett (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    A new model for hydrogen-assisted fatigue crack growth (HAFCG) in BCC iron under a gaseous hydrogen environment has been established based on various methods of observation, i.e., electron backscatter diffraction (EBSD), ...
  • The interstellar object ’Oumuamua as a fractal dust aggregate 
    Flekkøy, Eirik Grude; Luu, Jane; Toussaint, Renaud (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    The first known interstellar object 'Oumuamua exhibited a nongravitational acceleration that appeared inconsistent with cometary outgassing, leaving radiation pressure as the most likely force. Barring the alien lightsail ...
  • Investigating subsidence in the Bursa Plain, Turkey, using ascending and descending sentinel-1 satellite data 
    Aslan, G; Cakir, Ziyadin; Lasserre, Cécile; Renard, Francois (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    We characterize and monitor subsidence of the Bursa Plain (southern Marmara region of Turkey), which has been interpreted as resulting from tectonic motions in the region. We quantify the subsidence using Interferometric ...
  • Investigating the Onset of Strain Localization Within Anisotropic Shale Using Digital Volume Correlation of Time-Resolved X-Ray Microtomography Images 
    McBeck, Jessica Ann; Kobchenko, Maya; Hall, Stephen; Tudisco, Erika; Cordonnier, Benoit; Meakin, Paul; Renard, Francois (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Digital volume correlation analysis of time‐resolved X‐ray microtomography scans acquired during in situ triaxial compression of Green River shale cores provided time series of 3‐D incremental strain fields that elucidated ...
  • Investigation of n-Al:ZnO/p-Cu2O heterojunction for c-Si tandem heterojunction solar cell applications 
    Kumar, Raj; Nordseth, Ørnulf; Vasquez, Geraldo Cristian; Foss, Sean Erik; Monakhov, Eduard; Svensson, Bengt Gunnar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    In this work, an in-situ growth approach has been employed to fabricate Al:ZnO/Cu2O/Cu and Al:ZnO/ZnO/Cu2O/Cu heterojunctions using direct current (DC) and radio frequency (RF) magnetron sputtering technique in a controlled ...
  • Investigation of the Atomic Layer Deposition of the Titanium Dioxide (TiO2) Film as pH Sensor Using a Switched Capacitor Amplifier 
    Nematzadeh, Mozhdeh; Nilsen, Ola; Häfliger, Philipp; Killi, Veronica Anne-Line Kathrine (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    The electrical and chemical properties of the titanium dioxide (TiO2) coated spirals grown by the atomic layer deposition (ALD) technique in two different temperatures of 150 °C and 300 °C are studied. The thickness of the ...
  • Investigation of the electrostatic potential of a grain boundary in Y-substituted BaZrO3 using inline electron holography 
    Bondevik, Tarjei; Ness, Heine H.; Bazioti, Kalliopi; Norby, Truls Eivind; Løvvik, Ole Martin; Koch, Christoph T.; Prytz, Øystein (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    We apply inline electron holography to investigate the electrostatic potential across an individual BaZr0.9Y0.1O3 grain boundary. With holography, we measure a grain boundary potential of −1.3 V. Electron energy loss ...
  • Ionic conductivity in LixTaOy thin films grown by Atomic Layer Deposition (ALD) 
    Hu, Yang; Miikkulainen, Ville; Mizohata, Kenichiro; Norby, Truls Eivind; Nilsen, Ola; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The material system Li-Ta-O is a promising candidate for thin-film solid-state electrolytes in Li-ion batteries. In the present study, we have varied the Li content x in LixTaOy thin films grown by atomic layer deposition ...
  • Is the growth of marine copepods limited by food quantity or quality? 
    Hessen, Dag Olav (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Understanding what limits the growth of marine copepods is important for modeling food web dynamics and biogeochemical cycles in the ocean. We use a state-of-the-art stoichiometric model that explicitly represents metabolic ...
  • Isolating the factors that govern fracture development in rocks throughout dynamic in situ X-ray tomography experiments 
    McBeck, Jessica Ann; Kandula, Neelima; Aiken, John Mark; Cordonnier, Benoit; Renard, Francois (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Centuries of work have highlighted the importance of several characteristics on fracture propagation. However, the relative importance of each characteristic on the likelihood of propagation remains elusive. We rank this ...
  • Jahn-Teller active fluoroperovskites ACrF3 (A=Na+, K+): Magnetic and thermo-optical properties 
    Bernal, Fabian Leonardo Martinez; Lundvall, Fredrik; Kumar, Susmit; Hansen, Per-Anders S.; Wragg, David S.; Fjellvåg, Helmer; Løvvik, Ole Martin (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
    Chromium (II) fluoroperovskites A CrF 3 ( A = Na + , K + ) are strongly correlated Jahn-Teller active materials at low temperatures. In this paper, we examine the role that the A -site ion plays in this family of ...
  • JASPAR 2024: 20th anniversary of the open-access database of transcription factor binding profiles 
    Rauluseviciute, Ieva; Riudavets-Puig, Rafael; Blanc-Mathieu, Romain; Castro-Mondragon, Jaime Abraham; Ferenc, Katalin Terezia; Kumar, Vipin; Lemma, Roza Berhanu; Lucas, Jeremy; Cheneby, Jeanne; Baranasic, Damir; Khan, Aziz; Fornes, Oriol; Gundersen, Sveinung; Johansen, Morten; Hovig, Eivind; Lenhard, Boris; Sandelin, Albin; Wasserman, Wyeth W.; Parcy, François; Mathelier, Anthony (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    JASPAR (https://jaspar.elixir.no/) is a widely-used open-access database presenting manually curated high-quality and non-redundant DNA-binding profiles for transcription factors (TFs) across taxa. In this 10th release and ...
  • Juncus bulbosus nuisance growth in oligotrophic freshwater ecosystems: Different triggers for the same phenomenon in rivers and lakes? 
    Schneider, Susanne Claudia; Moe, Therese Fosholt; Hessen, Dag Olav; Kaste, Øyvind (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2013)
    Since the 1980s nuisance growth of the aquatic macrophyte Juncus bulbosus has been observed in an increasing number of rivers and lakes in Europe. Freshwater acidification, lake liming, as well as the impact of hydropower ...
  • Kinetics modeling of the carbon vacancy thermal equilibration in 4H-SiC 
    Ayedh, Hussein Mohammed Hussein; Nipoti, Roberta; Hallen, Anders; Svensson, Bengt Gunnar (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    The carbon vacancy (VC) is a major limiting-defect of minority carrier lifetime in n-type 4H-SiC epitaxial layers and it is readily formed during high temperature processing. In this study, a kinetics model is put forward ...
  • La1-xSrxMO3 (M = Co, Mn, Cr) interconnects in a 4-leg all-oxide thermoelectric generator at high temperatures 
    Madathil, Reshma Krishnan; Schuler, Raphael; Norby, Truls (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We herein report tests at high temperatures of a 4-leg oxide thermoelectric generator consisting of two pairs of p-type Ni0.98Li0.02O (Li–NiO) and n-type Zn0.98Al0.02O (Al–ZnO), assembled with various conducting perovskite ...