Browsing Institutt for fysikk by Issue Date
Now showing items 221-240 of 2677
-
Two-dimensional Simulations of Particle Deposition on a Cylinder in a Turbulent Cross Flow at Intermediate Reynolds Numbers
(Master thesis, 2011)The behaviour of particles in turbulent flow, with emphasis on particle deposition on both the frontside and backside of a cylinder, was investigated by means of Direct Numerical Simulations. One-way coupling between the ... -
Measurements of Young's Modulus on Rock Samples at Small Amplitude and Low Frequency: RockHard Deformations
(Master thesis, 2011)This thesis describes a new instrumental approach designed to measure the complex Young s modulus on cylindrical samples 1 inch in diameter 2 inch long and typically in the range of 1-70 GPa. Excitation frequencies are ... -
Engineered Surfaces for Redirection of Light
(Master thesis, 2011)It is of interest to construct windows that can spread the transmitted light in a specified manner. The Kirchhoff approximation in the geometrical optical limit in combination with a chosen general form of the window ... -
Electron Microscopy characterization of the Interface between a (111)-Si Substrate and GaAs Nanowires grown by Self-Catalysis by MBE
(Master thesis, 2011)The interface between zincblende (ZB) GaAs nanowires (NWs) grown by selfcatalysisin MBE, and a 111-Si substrate was studied. This was done with thepurpose of determining if any defects, stacking fault, twins, different ... -
Quantitative (S)TEM analysis of intermediate band solar cell materials
(Master thesis, 2011)In this thesis the strain properties of two InAs/GaAs quantum dot intermediate band solar cell materials have been explored. Both samples were thin films grown on a (100) GaAs substrate. The quantum dot material was InAs, ... -
Modeling of the Intermediate Band Tandem Solar Cell: Using the AM1.5 Spectra
(Master thesis, 2011)In this thesis the results from simulations of a tandem intermediate band solar cell are presented and discussed. Renewable energy sources have become increasingly important, because of global environmental concerns. To ... -
Observation of a mesospheric front in a thermal-doppler duct over King George Island, Antarctica
(Journal article; Peer reviewed, 2011)A mesospheric front was observed with an all-sky airglow imager on the night of 9–10 July 2007 at Ferraz Station (62° S, 58° W), located on King George island on the Antarctic Peninsula. The observed wave propagated from ... -
Growth and Characterization of Germanium Quantum Dots and Crystalline Silicon
(Master thesis, 2011)Germanium quantum dots in a silicon matrix can be used in so-called intermediate band solar cells. Such solar cells have efficiency limits exceeding that of the conventional single junction solar cells. In this master ... -
Aspects of QCD thermodynamics through scalar field theory and NJL models
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:188, Doctoral thesis, 2011) -
Tunable supercurrent at the charge neutrality point via strained graphene junctions
(Journal article; Peer reviewed, 2011)We theoretically calculate the charge-supercurrent through a ballistic graphene junction where superconductivity is induced via the proximity-effect. Both monolayer and bilayer graphene are considered, including the ... -
Results from the intercalibration of optical low-light calibration sources 2011
(Journal article; Peer reviewed, 2011)Following the 38th Annual European Meeting on Atmospheric Studies by Optical Methods in Siuntio in Finland, an intercalibration workshop for optical low light calibration sources was held in Sodankyla, Finland. The main ¨ ... -
UV-doser til psoriasispasienter og behandlingseffekt i løpet av tre ukers klimabehandling på Gran Canaria
(Master thesis, 2011)Psoriasis er en kronisk, inflammatorisk hudsykdom som gir tykke skjelldannelser på en rød hudoverflate. Sykdommen rammer 2-3% av den europeiske befolkningen. Ultrafiolett (UV) stråling som bruk i behandling av psoriasis ... -
Scalar wave scattering from two-dimensional, randomly rough surfaces
(Master thesis, 2011)We study scalar waves scattered from self-affine and Gaussian correlated surfaces. The simulations are performed using rigorous simulation of the integral equations derived from the Helmholtz equation, describing a scalar ... -
On the model-dependence of the relation between minimum-bias and inelastic proton-proton cross sections
(Peer reviewed; Journal article, 2011)The model-dependence of the relation between the inelastic and various minimum-bias proton–proton cross sections is analyzed, paying a special attention to the sensitivity of minimum-bias triggers to diffractive collisions. ... -
Time domain studies of training effects in Co/Cu/FeNi/FeMn spin valves
(Master thesis, 2011)The recovery and the relaxation behaviors of the exchange bias (HE) in a Co/Cu/FeNi/FeMnspin valve has been studied via point contact technique with high field scan rates ranging from 1050 to 13500 Oe/s. The evolution of ... -
Antideuterons as Signature for Dark Matter
(Master thesis, 2011)In this thesis, we examine the antideuteron spectra from annihilations of dark matter in the form of Weakly Interacting Massive Particles (WIMPs). The so-called coalescence model is commonly used to describe the production ... -
Planetary Wave Oscillations observed in Ozone and Temperature Data from Antarctica during 2009
(Master thesis, 2011)Ozone and temperature data from Troll and Rothera research stations has been analyzed in order to trace planetary waves. Seasonal variations were removed and spectral analysis was performed in order to find dominating ... -
Måling og modellering av vanntransportegenskaper til svelleband til høyspenningskabler
(Master thesis, 2011)Vanntrevekst er en av de viktigste grunnene til elektrisk havari i høyspenningskabler.Vanntrær begynner å vokse når den relative fukten(RH) i kabelisolasjonenoverstiger 70 %RH. Det er derfor viktig å holde en lav fuktigheti ... -
Asymmetriske Energivariasjoner i Turbulens: Invers statistikk metode for beskrivelse av asymmetrisk energivariasjon
(Master thesis, 2011)Energivariasjon i fullt utviklet turbulens er studert. I en tidsserie for tur- bulens energi er det oppdaget en asymmetri mellom positive og negative energiendringer. Invers statistikk metode gir en mulighet til å studere ... -
Numerical Study of the Interaction of Flow over Two Airfoils in Relative Motion
(Master thesis, 2011)Computational fluid dynamics (CFD) was be used to investigate aspects of interaction of flow over two airfoils in relatie motion in detail.%Problem statement2D tandem airfoil setups were studied, where the leading airfoil ...