Browsing Institutt for fysikk by Issue Date
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Characterization of Bioaerosols using Electron Microscopy with Special Emphasis on Airborne Bacteria
(Master thesis, 2014)Bioterrorist attacks on confined, indoor areas such as underground subway stations by the release of pathogenic microorganisms into air, could pose a threat to public safety. The potential threat may be severe not only due ... -
Electrical Characterization of Silicon Cores from Glass-Cladded Fibres
(Master thesis, 2014)Semiconductor core fibres represent an emerging technology with potential applications in many areas, including photovoltaics and optical transmission. Recent advances in fibre manufacturing techniques has allowed long, ... -
Investigation of Methods for 2D Strain Imaging of Brain Tumors
(Master thesis, 2014)Intraoperative ultrasound strain imaging displays brain tissue stiffness rather than difference in mass density as regular B-mode imaging. A glioma (the most common type of brain tumor) has a tendency of infiltrating ... -
Parallel Instabilities in Two-Phase Flow in Porous Media
(Master thesis, 2014)Two immiscible fluids flowing in parallel with respect to the interface separating them in a two-dimensional porous medium has been studied using a dynamic network model. Two immiscible fluids, one wetting and the other ... -
Spin-Motive Forces and Electron-Electron Interactions
(Master thesis, 2014)In this thesis, the spin-motive force, a spin-dependent force arising due to magnetization dynamics in an inhomogenous magnetic system, is investigated. We consider how spin-currents, arising from the spin dependent force, ... -
Rapid Steady State Convergence for Quantum Systems Using Time-Delayed Feedback Control
(Journal article; Peer reviewed, 2014) -
Mesoscale gravity wave activity in the Mesosphere over Northern-Norway
(Master thesis, 2014)The purpose of this study is to examine wind data retrieved from the SKiYMET-radarsat Trondheim and Andenes during the time period of the 27th of November to the 02ndof December 2012. These dates surrounds the night between ... -
Continuous-wave broadly tunable high-power Cr:CdS laser
(Journal article; Peer reviewed, 2014)We report spectroscopic characteristics and laser properties of the mid-infrared active laser medium Cr2+:CdS. Temperature-dependent absorption, luminescence and lifetime measurements of the 5E exited state allow determination ... -
Timing and Controlling Dissolution of Cell Repellent Poly(Vinyl Alcohol) Thin Films for Patterned Cell Micro-Arrays
(Master thesis, 2014)Recently, a novel, high-throughput, patterned cell micro-array has been developed using polydopamine and poly(vinyl alcohol) (PVA) as cell adhesive and cell repellent surfaces, respectively. The step converting the cell ... -
Advanced Mueller Matrix Imaging Ellipsometry: Silicon Strain Imaging, Visualisation of Collagen Fibre 3-D Orientation & Development of a Mueller Matrix Imaging Microscope
(Master thesis, 2014)A custom built near-infra-red (NIR) Mueller matrix imaging ellipsometer (MMI) based on ferroelectric liquid crystals (FLCs) and waveplates (WPs) is described in detail. The instrument is used to perform strain-induced ... -
Can a meteor measure vertical winds?
(Master thesis, 2014)In the first part of this thesis the zonal and meridional tilt of the SKiYMET Meteor Radar at Dragvoll (63.4 N 10.5 E) has been found using two different methods. The average zenith angle model found the zonal tilt to be ... -
Attenuation correction in PET/MR: A performance assessment of UTE-based and Dixon-based methods for PET attenuation correction
(Master thesis, 2014)Hybrid positron emission tomography/magnetic resonance imaging (PET/MR) scanners are one of the latest tools available in the field of medical imaging, and are expected to outperform the well-established PET/X-ray computed ... -
En EXAFS-studie av DFT-modellerte AuCu-nanopartikler: Cupiditas de SmAug
(Master thesis, 2014)En strukturstudie av AuCu-nanopartikler har blitt gjennomført ved hjelp av DFT og EXAFS. Det ble i alt undersøkt 18 DFT-modellerte AuCu-nanopartikler med størrelser fra 38 til 80 atomer og varierende støkiometrisk ... -
µSR study of Al-0.67%Mg-0.77%Si alloys
(Journal article; Peer reviewed, 2014)Zero-field muon spin relaxation measurements were carried out with Al-0.67%Mg- 0.77%Si alloys in the temperature range from 20 K to 300 K. Observed relaxation spectra were compared with the relaxation functions calculated ... -
Friction Models for Oscillating Flow in a U-tube
(Master thesis, 2014)The basic theory of friction in pipe flow was reviewed in the first part of this thesis. Using the results from this review, steady state friction relations were derived for laminar and turbulent pipe flow.Steady state ... -
Aberration-corrected HAADF-STEM investigations of precipitate structures in Al-Mg-Si alloys with low Cu additions
(Journal article, 2014)Precipitates in a lean Al–Mg–Si alloy with low Cu addition (~0.10 wt.%) were investigated by aberration-corrected high angle annular dark field scanning transmission electron microscopy (HAADF-STEM). Most precipitates were ... -
Motion Prediction by Optimal Paths Through Disordered Landscapes
(Master thesis, 2014)The ability to navigate safely and efficiently through a given landscape is relevant for any intelligent moving object. Examples range from robotic science and traffic analysis to the behavior within an ecosystem. Through ... -
Gigahertz Femtosecond Cr:ZnS Laser
(Chapter, 2014)We demonstrate the first Cr:ZnS laser with a gigahertz pulse repetition rate. The passively mode-locked by the graphene-based mirror laser provides 105 mW output power with 180 fs pulse duration and 110 pJ pulse energy. -
Ab initio interface configuration determination for β″ in Al-Mg-Si: Beyond the constraint of a preserved precipitate stoichiometry
(Journal article; Peer reviewed, 2014)The precipitate-host lattice interface configuration stabilities for the β″ phase in the Al–Mg–Si alloy system have been examined using density functional theory. Usually, the supercell based calculations underlying such ... -
Interfacial and strain energy analysis from ab initio based hierarchical multi-scale modelling: the Al–Mg–Si alloy β'' phase
(Journal article, 2014)Precipitate-host lattice interface studies have not traditionally been viewed as requiring hybrid model schemes for accurate determination of the interfacial and strain energies. On the other hand, the interfaces of main ...