Browsing Det matematisk-naturvitenskapelige fakultet by Title

Now showing items 206-225 of 838

  • Dynamic in situ three-dimensional imaging and digital volume correlation analysis quantify strain localization and fracture coalescence in sandstone 
    Renard, Francois; McBeck, Jessica Ann; Cordonnier, Benoit; Zheng, Xiaojiao; Kandula, Neelima; Sanchez, Jesus Rodriguez; Kobchenko, Maya; Noiriel, Catherine; Zhu, Wenlu; Meakin, Paul; Fusseis, Florian; Dysthe, Dag Kristian (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Advances in triaxial compression deformation apparatus design, dynamic X-ray microtomography imaging, data analysis techniques, and digital volume correlation analysis provide unparalleled access to the in situ four-dimensional ...
  • Dynamic pressure variations in the lower crust caused by localized fluid-induced weakening 
    Moulas, Evangelos; Kaus, Boris; Jamtveit, Bjørn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract Metamorphism of dry, lower crust within orogens is often localized in shear zones composed of mechanically weaker rocks 1–4 . Several field-based studies suggest shear zone development is preceded by brittle faults ...
  • Dynamics of a giant slow landslide complex along the coast of the Aral Sea, Central Asia* 
    Aslan, Gökhan; De Michele, Marcello; Raucoules, Daniel; Renard, Francois; Dehls, John F.; Penna, Ivanna Marina; Hermanns, Reginald Leonhard Manfred; Çakir, Ziyadin (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We report here a slow-moving landslide complex of the lateral spreading type revealed by Sentinel-1 interferometric timeseries analysis. Located along the western coast of the Aral Sea, with a >150-km length and 3-km width, ...
  • Dynamics of Interlayer Na-Ions in Ga-Substituted Na2Zn2TeO6 (NZTO) Studied by Variable-Temperature Solid-State 23Na NMR Spectroscopy and DFT Modeling 
    Hempel, Frida Sveen; Martineau-Corcos, Charlotte; Bianchini, Federico; Fjellvåg, Helmer; Arstad, Bjørnar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Local Na-coordination and dynamics of Na2–xZn2–xGaxTeO6; x = 0.00 (NZTO), 0.05, 0.10, 0.15, 0.20, were studied by variable-temperature, 23Na NMR methods and DFT AIMD simulations. Structure and dynamics were probed by NMR ...
  • Dynamics of microscale precursors during brittle compressive failure in Carrara marble 
    Kandula, Neelima; Cordonnier, Benoit; Boller, Elodie; Weiss, Jérôme; Dysthe, Dag Kristian; Renard, Francois (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Microscale heterogeneities influence failure mechanisms in the crust. To track the microstructural changes in rock samples when loaded until failure, we employed a novel experimental technique that couples dynamic X‐ray ...
  • Dysregulation of MITF Leads to Transformation in MC1R-Defective Melanocytes 
    Lavelle, Timothy J; Alver, Tine Norman; Heintz, Karen Marie; Wernhoff, Patrik; Nygaard, Vegard; Nakken, Sigve; Øy, Geir Frode; Bøe, Sigurd; Urbanucci, Alfonso; Hovig, Eivind (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The MC1R/cAMP/MITF pathway is a key determinant for growth, differentiation, and survival of melanocytes and melanoma. MITF-M is the melanocyte-specific isoform of Microphthalmia-associated Transcription Factor (MITF) in ...
  • Earthquake nucleation in the lower crust by local stress amplification 
    Campbell, Lucy; Menegon, Luca; Pennacchioni, Giorgio; Fagereng, Åke (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Deep intracontinental earthquakes are poorly understood, despite their potential to cause significant destruction. Although lower crustal strength is currently a topic of debate, dry lower continental crust may be strong ...
  • Effect of electron doping on the crystal structure and physical properties of an n = 3 Ruddlesden-Popper compound La4Ni3O10 
    Periyasamy, Manimuthu; Patra, Lokanath; Fjellvåg, Øystein; Ravindran, Ponniah; Sørby, Magnus Helgerud; Kumar, Susmit; Sjåstad, Anja Olafsen; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    The physical properties of La4Ni3O10 with a two-dimensional (2D)-like Ruddlesden–Popper-type crystal structure are extraordinarily dependent on temperature and chemical substitution. By introducing Al3+ atoms randomly at ...
  • Effect of Nitrogen Doping on the Performance of Mesoporous CMK-8 Carbon Anodes for Li-Ion Batteries 
    Calcagno, G.; Agostini, M.; Xiong, S.; Matic, A.; Palmqvist, A. E. C.; Cavallo, Carmen (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Designing carbonaceous materials with heightened attention to the structural properties such as porosity, and to the functionalization of the surface, is a growing topic in the lithium-ion batteries (LIBs) field. Using a ...
  • Effect of Subcycle Arrangement on Direct Epitaxy in ALD of LaNiO3 
    Sønsteby, Henrik Hovde; Skaar, Erik; Fjellvåg, Helmer; Nilsen, Ola (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Monolithic device integration of crystalline complex oxide thin films can open for smarter and more sustainable devices in electronics and energy technology. However, the facile integration of such compounds has so far ...
  • Effect of the native oxide on the Surface Passivation of Si by Al2O3 
    Getz, Michael; Povoli, Marco; Monakhov, Eduard (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    The effect of the native silicon oxide layer on the passivation properties of Al2O3 on p-type Si surfaces has been investigated. This was done by comparing effective carrier lifetime, surface saturation current density, ...
  • Effect of the Niobium Doping Concentration on the Charge Storage Mechanism of Mesoporous Anatase Beads as an Anode for High-Rate Li-Ion Batteries 
    Cavallo, Carmen; Gonano, Bruno Raymond Gino (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    A promising strategy to improve the rate performance of Li-ion batteries is to enhance and facilitate the insertion of Li ions into nanostructured oxides like TiO2. In this work, we present a systematic study of pentavalent-doped ...
  • Effects of annealing on photoluminescence and defect interplay in ZnO bombarded by heavy ions: Crucial role of the ion dose 
    Azarov, Alexander; Galeckas, Augustinas; Mieszczyński, Cyprian; Hallen, Anders; Kuznetsov, Andrej (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    Bombardment of ZnO with heavy ions generating dense collision cascades is of particular interest because of the formation of nontrivial damage distribution involving a defected layer located between the surface and the ...
  • Effects of atorvastatin on human bone marrow-derived mesenchymal stem cellsRestricted Access 
    Bui, Chuong-Dai (Master thesis / Masteroppgave, 2023)
    Osteoporose er et stort globalt helseproblem med høy samfunnsøkonomisk byrde. Tidligere studier har antydet at statiner regulerer beinremodellering og kan potensielt brukes i behandling av osteoporose. Legumain er en ...
  • Effects of electrochemical intervention on the remediation of black-odorous water: insights into microbial community dynamics and functional shifts in sediments 
    Shi, Yingying; Wei, Zhipeng; Xu, Yaofei; Lu, Xiang; Ruan, Aidong (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Black-odorous water is a severe environmental issue that has received continuous attention. The major purpose of the present study was to propose an economical, practical, and pollution-free treatment technology. In this ...
  • Effects of Ga Substitution on the Local Structure of Na2Zn2TeO6 
    Hempel, Frida Sveen; Bianchini, Federico; Arstad, Bjørnar; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    In the work presented here, we prepared Ga-substituted NZTO (Na2–xZn2–xGaxTeO6, x = 0.00, 0.05, 0.10, 0.15, 0.20) layered materials with a soft chemical, citric acid-based synthesis method and characterized these by means ...
  • Effects of implantation temperature and annealing on structural evolution and migration of Se into glassy carbon 
    Adeojo, Samuel; Malherbe, Johan; Azarov, Alexander; Odutemowo, Opeyemi; Njoroge, Eric; Abdelbagi, Hesham; Mpelane, Siyasanga; Hlatshwayo, Thulani (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
    The use of glassy carbon (GC) as a future nuclear waste storage material depends on its capability to retain all radioactive fission products found in spent nuclear fuels. Selenium (79Se) is found in trace amounts in uranium ...
  • Effects of La2O3 Addition into CaO-SiO2 Slag: Structural Evolution and Impurity Separation from Si-Sn Alloy 
    Zhu, Mengyi; Wu, Guixuan; Azarov, Alexander; Monakhov, Eduard; Tang, Kai; Müller, Michael; Safarian, Jafar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Boron (B) and phosphorus (P) are the most problematic impurities to be removed in the production of solar-grade silicon by the metallurgical process. In this work, the distribution of B and P between CaO-(La2O3)-SiO2 slags ...
  • Effects of Perchlorate and Other Groundwater Inorganic Co-Contaminants on Aerobic RDX Degradation 
    Yadav, Amit; Gupta, Swati; Istvan, Paula; Ronen, Zeev (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) pollution is accompanied by other co-contaminants, such as perchlorate and chlorates, which can retard biodegradation. The effects of perchlorate and chlorate on aerobic RDX ...
  • Effects of silver catalyst concentration in metal assisted chemical etching of silicon 
    Venkatesan, Ragavendran; Arivalagan, Muthu Kumar; Venkatachalapathy, Vishnukanthan; Pearce, Joshua M.; J, Mayandi (Journal article / Tidsskriftartikkel / SubmittedVersion, 2018)
    A systematic investigation is performed to determine the effects of the concentration of silver on metal assisted chemical etching (MaCE) for nanostructure formation mechanisms on silicon as well as their resultant optical ...