Browsing Institutt for fysikk by Title
Now showing items 1998-2017 of 2770
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Radiation dose and image quality in CT - Comparison and evaluation of two different organ-based tube current modulation techniques and their impact on organ dose and image noise
(Master thesis, 2019)Bakgrunn: Computertomografi (CT) -undersøkingar er eit mykje brukt vertøy i medisinsk dignostikk, og bruken aukar. Denne auka har først til auka uro over stråledosen pasientar blir utsett for. Det er viktig å optimalisere ... -
Radiation dose and image quality in CT - Evaluation of how slice thickness, tube current modulation and reconstruction algorithms affect radiation dose and image noise
(Master thesis, 2018)Background: Helse Vest has currently standardized the computed tomography (CT) Thorax/Abdomen/Pelvis protocols in the region. One of the standardized parameters was a reduction of the reconstructed slice thickness from 5 ... -
Radiation fields and viscous cosmology - Friction in General Relativity
(Master thesis, 2015)Certain aspects of the Lorentz transformation, sometimes called beaming, aberration or transverse Doppler effect, induce viscosity-like effects on extended objects moving through radiation fields. In this thesis, these ... -
Radiative corrections to van der Waals interaction in fluids
(Master thesis, 2012)The van der Waals interaction energy is derived for a homogenous fluid of polarizable particles. Low-temperature corrections to the van der Waals interaction energy are computed numerically for three cases: Dilute media ... -
Radiotherapeutic Limits of Acceptance for Errors in Synthetic CT Synthesised from MRI
(Master thesis, 2020)CT-skanninger, som resulterer i elektrontetthetskart eller massetetthetskart, er standard inndata for strålebehandlingplanleggingssystemer. Imidlertid gir MR overlegen bløtvevskontrast. I tilfeller der MR er nødvendig for ... -
Raman and Infrared spectroscopies and X-ray diffraction data on bupivacaine and ropivacaine complexed with 2-hydroxypropyl-beta-cyclodextrin
(Journal article; Peer reviewed, 2017)The data presented in this article are related to the research article entitled “Probing the dynamics of complexed local anesthetics via neutron scattering spectroscopy and DFT calculations (http://dx.doi.org/10.1016/j.i ... -
Raman Soliton Fiber Lasers Tunable Between 1.98 – 2.22 um
(Chapter, 2016)We report two compact diode-pumped mode-locked femtosecond thulium-doped silica-fiber-based MOPAs, operating in the Raman soliton regime with the tunability between 1.98-2.22 μm, including a 75-nJ, 21-MHz fiber laser and ... -
Random angle grain boundary formation and evolution dynamics during Si directional solidification
(Journal article; Peer reviewed, 2019)The growth of multicrystalline silicon and the formation of a random angle grain boundary, as well as the dislocation generation and expansion is observed dynamically in situ, by Synchrotron X-ray imaging techniques. The ... -
Rapid carrier lifetime degradation and regeneration in high-performance multicrystalline silicon wafers
(Master thesis, 2020)Målet med denne masteroppgaven er å øke forståelsen av degradering i p-type høyytelse multikrystallinsk silisium (HPMC-Si) ved bruk av karakteriseringsteknikkene kvasi-likevektstilstand fotokonduktans (QSSPC) og ... -
Rapid Directional Recrystallisation of SiGe Fibres
(Master thesis, 2015)Fibre av \ce{SiGe} fremstilt ved flytende kjerne-trekking har blitt rekrystallisert ved bruk av to forskjellige teknikker: Sakte kj{\o}ling i en tubeovn og bevegende smeltesone-rekrystallisering med en \ce{CO2}-laser. To ... -
Rapid Steady State Convergence for Quantum Systems Using Time-Delayed Feedback Control
(Journal article; Peer reviewed, 2014) -
Rayleigh and Wood anomalies in the diffraction of acoustic waves from the periodically corrugated surface of an elastic medium
(Journal article; Peer reviewed, 2016)By the use of the Rayleigh method we have calculated the angular dependence of the reflectivity and the efficiencies of several other diffracted orders when the periodically corrugated surface of an isotropic elastic medium ... -
Rayleigh and Wood anomalies in the diffraction of light from a perfectly conducting reflection grating
(Journal article; Peer reviewed, 2016)By means of a modal method we have calculated the angular dependence of the reflectivity and the efficiencies of several other diffracted orders of a perfectly conducting lamellar reflection grating illuminated by p-polarized ... -
Reacceleration of charged dark matter
(Peer reviewed; Journal article, 2020)Charged particles scattering on moving inhomogenities of the magnetised interstellar medium can gain energy through the process of second-order Fermi acceleration. This energy gain depletes in turn the magnetic wave spectrum ... -
Real Time 3D Observations of Portland Cement Carbonation at CO2 Storage Conditions
(Peer reviewed; Journal article, 2020)Depleted oil reservoirs are considered a viable solution to the global challenge of CO2 storage. A key concern is whether the wells can be suitably sealed with cement to hinder the escape of CO2. Under reservoir conditions, ... -
Real-time classification of mediastinal lymph nodes in endobronchial ultrasound images using deep neural networks
(Master thesis, 2024)Bakgrunn og formål Korrekt klassifisering av lymfeknute stasjoner i mediastinum er nødvendig for å bestemme riktig lungekreft stadium. Dette er informasjon som brukes til å gi pasienten den mest effektive behandlingen. Det ... -
Real-time in situ Mueller matrix ellipsometry of GaSb nanopillars: observation of anisotropic local alignment
(Journal article; Peer reviewed, 2011)The formation of GaSb nanopillars by low energy ion sputtering is studied in real-time by spectroscopic Mueller matrix ellipsometry, from the initial formation in the smooth substrate until nanopillars with a height of 200 ... -
Real-time intravital multiphoton microscopy to visualize focused ultrasound and microbubble treatments to increase blood-brain barrier permeability
(Peer reviewed; Journal article, 2022)The blood-brain barrier (BBB) is a key challenge for the successful delivery of drugs to the brain. Ultrasound exposure in the presence of microbubbles has emerged as an effective method to transiently and locally increase ... -
Real-time Study of the Formation of GaSb Nanopillars by Spectroscopic Mueller Matrix Ellipsometry
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:208, Doctoral thesis, 2011)The formation of GaSb nanopillars have been studied in real-time by spectroscopic Mueller matrix ellipsometry. Low energy ion sputtering of GaSb leads to the formation of densely packed nanopillars on the surface. A graded ... -
RECOMMENDATIONS FOR A MULTICAMPUS COURSE DEVELOPED THROUGH A “STUDENTS AS PARTNERS” PROJECT
(Chapter, 2022)This paper presents recommendations for a Multicampus course, developed through a Student as Partners SURMHFW ,QWKLVproject students, a teacher and an educational developer collaborated following the principles of the ...