Browsing Institutt for fysikk by Title
Now showing items 2709-2728 of 2772
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Vacancy and solute co-segregated η1 interface in over-aged Al-Zn-Mg alloys
(Journal article; Peer reviewed, 2021)We present a combined first-principles and scanning transmission electron microscopy (STEM) study of the η1/Al interfaces in an over-aged Al-Zn-Mg alloy. As one of the major η-MgZn2 precipitate types, η1 tends to form ... -
Vacuum Polarization Instead of “Dark Matter” in a Galaxy
(Journal article; Peer reviewed, 2022)We considered a vacuum polarization inside a galaxy in the eikonal approximation and found that two possible types of polarization exist. The first type is described by the equation of state p=ρ/3, similar to radiation. ... -
Vacuum ultraviolet optical properties of GaSb determined by synchrotron rotating analyzer ellipsometry: applications in nanopillars and plasmonics
(Peer reviewed; Journal article, 2023)The vacuum ultraviolet (VUV) optical properties in the range 4 eV to 15 eV of GaSb have been determined by rotating analyzer ellipsometry (RAE) using synchrotron light. The localized surface plasmon resonances (LSPRs) and ... -
Valence states in sub-monolayer samarium films on graphene supported on ruthenium and nickel
(Master thesis, 2023)Denne oppgaven undersøker overflateegenskapene til enkeltsubstrater av overgangsmetall Ru(001) og Ni(111) mettet med grafendopet Samarium(Sm) monolag av sjeldne jordarter. Fire komplementære overflatevitenskapsteknikker ... -
Validating the algorithms AAA and Acuros for calculation of dose from flattening filter free beams in heterogenous tissue - Application to stereotactic radiotherapy of lung tumors
(Master thesis, 2015)In radiation therapy of cancer, modeling the dose to the patient is very important. Several computational algorithms are available, where some model dose in heterogeneous tissue better than others. After implementation of ... -
Validating the laminar population analysis for decomposing cortical multielectrode data on a model of the mouse primary visual cortex
(Master thesis, 2019)Teknologisk innovasjon har ført til en stor økning i mengden nevrale data som kan innhentes på en gang, noe som har avlet et behov for nye metoder for å analysere disse store, multidimensjonale datasettene. Laminære ... -
Validation of middle-atmospheric campaign-based water vapour measured by the ground-based microwave radiometer MIAWARA-C
(Journal article; Peer reviewed, 2013)Abstract. Middle atmospheric water vapour can be used as a tracer for dynamical processes. It is mainly measured by satellite instruments and ground-based microwave radiometers. Ground-based instruments capable of measuring ... -
Validation of SSUSI-derived auroral electron densities: comparisons to EISCAT data
(Peer reviewed; Journal article, 2021)The coupling of the atmosphere to the space environment has become recognized as an important driver of atmospheric chemistry and dynamics. In order to quantify the effects of particle precipitation on the atmosphere, ... -
Van der Waals interactions: Corrections from radiation in fluids
(Journal article; Peer reviewed, 2013) -
Vapor deposited Cr-doped ZnS thin films: Towards optically pumped mid-infrared waveguide lasers
(Journal article; Peer reviewed, 2016)Compact, affordable mid-IR lasers require the development of gain materials in waveguide form. We report on the high vacuum deposition of Cr:ZnS films with concentration ranging from 1018-1020 dopants/cm3 . At low ... -
Variability of the Quasi Two-Day Wave in the Mesosphere
(Master thesis, 2013)The Quasi-Two-Day-Wave (QTDW) is examined through analysis of data given by the SKiYMET-radar at Dragvoll, Trondheim (63◦N,10◦E). Through spectral analysis the occurrence and generation mechanisms of the different wave ... -
Variation of elastic energy shows reliable signal of upcoming catastrophic failure
(Journal article; Peer reviewed, 2019)We consider the Equal-Load-Sharing Fiber Bundle Model as a model for composite materials under stress and derive elastic energy and damage energy as a function of strain. With gradual increase of stress (or strain) the ... -
Variational approach to a fiber-laser spatialtemporal dissipative soliton: 3D-confinement
(Research report, 2022) -
Varying oxygen coverage on Cu55 and its effect on CO oxidation
(Journal article; Peer reviewed, 2019)Adsorption of molecular oxygen on a Cu55 cluster and the resulting oxidation effects have been investigated by spin-polarized density functional theory (DFT). The optimal structure for each Cu55O2N (N = 1–20) complex has ... -
Vascular characterization of tumors growing in the chorioallantoic membrane
(Master thesis, 2017)The chick chorioallantoic membrane (CAM) model has been widely used to study different biological and medical processes, including angiogenic response, tumor development and drug-delivery. Such studies can be achieved ... -
Vela as the source of Galactic cosmic rays above 100 TeV
(Journal article, 2019)We model the contribution of the nearest young supernova remnant Vela to the local cosmic ray flux taking into account both the influence of the Local Superbubble and the effect of anisotropic diffusion. The magnetic field ... -
Vela as the Source of Galactic Cosmic Rays above 100 TeV
(Peer reviewed; Journal article, 2020)We modeled the contribution of the young supernova remant Vela to the local cosmic rays taking into account the effect of the Local superBubble and an anistropic diffusion. We recovered the knee observed in the CR spectrum ... -
Velocity error induced by unevenly sampling wind radars
(Master thesis, 2014)Measurements of atmospheric winds in the mesosphere and lower thermosphere (MLT)region using a SKiYMET radar started in Trondheim (63.4 N, 10.4 E) in September2012. This meteor radar utilizes the ionized trail from meteors ... -
Versatile, cell and chip friendly method to gel alginate in microfluidic devices
(Journal article, 2016)Alginate is used extensively in microfluidic devices to produce discrete beads or fibres at the microscale. Such structures may be used to encapsulate sensitive cargoes such as cells and biomolecules. On chip gelation of ... -
Very sharp diffraction peak in nonglass-forming liquid with the formation of distorted tetraclusters
(Peer reviewed; Journal article, 2020)Understanding the liquid structure provides information that is crucial to uncovering the nature of the glass-liquid transition. We apply an aerodynamic levitation technique and high-energy X-rays to liquid (l)-Er2O3 to ...