Browsing Fysisk institutt by Title
Now showing items 1440-1459 of 3682
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)The high‐latitude ionosphere is highly dynamical with significant irregularities and density gradients. However, the spatial and temporal distributions of density gradients and irregularities are very different between the ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)The Swarm satellites offer an unprecedented opportunity for improving our knowledge about polar cap patches, which are regarded as the main space weather issue in the polar caps. We present a new robust algorithm that ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)With the data from the Swarm satellite mission, we study the variability of ionospheric plasma parameters for low and high solar activities. We focus on the electron density measured by Swarm and derived parameters and ...
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(Master thesis / Masteroppgave, 2021)
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(Master thesis / Masteroppgave, 2009)Oppgaven gir en innføring i anyoner, partikler med fraksjonell statistikk som kun finnes i to-dimensjonale systemer. Disse partiklene interpolerer mellom bosoner og fermioner, og derfor behandles også de to-dimensjonale ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)The intermittent dynamics of slow drainage flows in a porous medium is studied experimentally. This kind of two-phase flow is characterized by a rich burst activity and our setup allows us to characterize those bursts ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)The Monte Carlo event generator HYDJET++ (HYDrodynamics with JETs) contains the description of both soft and hard processes in relativistic heavy-ion collisions by combining the parametrized hydrodynamics with the treatment ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)We study the layered J1− J 2 classical Heisenberg model on the square lattice using a self-consistent bond theory. We derive the phase diagram for fixed J1 as a function of temperature T, J2, and interplane coupling Jz. ...
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(Chapter / Bokkapittel / SubmittedVersion, 2017)An anomalous magnetism is observed in an ex-situ bilayer of high-temperature superconductor YBa2Cu3O7-? (YBCO) and colossal magnetoresistive material La0.67Ca0.33MnO3 (LCMO). The magnetism results in strong in-plane ...
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(Master thesis / Masteroppgave, 2018)Thin-film bilayers of the high temperature superconducting compound YBa2Cu3O7−δ (YBCO) and the half-metallic colossal magnetoresistive material La0.67Ca0.33MnO3 (LCMO) have been investigated with electronic transport ...
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(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 ...
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(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 ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)We demonstrate theoretically and numerically that laser-driven many-electron dynamics, as described by bivariational time-dependent coupled-cluster theory, may be analyzed in terms of stationary-state populations. Projectors ...
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(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), ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)It is shown that human skin acts like a memristor but systematic studies on skin memristance are not published, yet. If e.g., a low frequency voltage is applied to human skin and the current is measured, a hysteresis loop ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Photoelectrochemical (PEC) water electrolysis is an important energy conversion (power-to-chemical) method, providing a solution to the intermittent nature of solar energy. However, as PEC systems usually suffer from low ...
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(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 ...
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(Master thesis / Masteroppgave, 2008)In this work, intramolecular and intermolecular associations under the effect of shear flow of dilute aqueous alkaline solutions of dextan, hydroxyethylcellulose (HEC), and the hydrophobically modified analogue (HM-2-HEC) ...
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(Doctoral thesis / Doktoravhandling, 2012)
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(Doctoral thesis / Doktoravhandling, 2023)A multitude of today's electronic devices require a material which is both optically transparent and electrically conductive in order to operate as intended. Several such materials have been developed, and are technologically ...