Browsing Institutt for fysikk by Title
Now showing items 1665-1684 of 2669
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Optimal choice of state tomography quorum formed by projection operators
(Journal article; Peer reviewed, 2019)A minimal set of measurement operators for quantum state tomography has in the nondegenerate case ideally eigenbases which are mutually unbiased. This is different for the degenerate case. Here we consider the situation ... -
Optimal path for the flow of yield stress fluids
(Doctoral theses at NTNU;2023:386, Doctoral thesis, 2023)Numerous real-world applications depend on understanding how liquids or gases flow through the tiny holes of materials like soil or rocks, called “porous media”. These applications range from cleaning up polluted groundwater ... -
Optimal Paths in Random Conductor Networks
(Master thesis, 2013)In this master thesis, the spanning path through a random conductor network with aquenched threshold distribuion has been studied. An argument is made using a hierar-chial model, that for bonds having a piecewise linear ... -
Optimal threshold for PET-based autocontouring of boost volume for radiotherapy of anal carcinoma
(Master thesis, 2017)For patients with anal carcinoma, local tumor control and local recurrence after radiotherapy treatment is a challenge. To improve the local control, a dose escalation could be delivered. Using FDG-PET, the most glucose-avid ... -
"Optimalisering av IMRT-planar for øyre-nase-hals-kreft"
(Master thesis, 2009)In the dose planning system Oncentra MasterPlan there is a module for IMRT planning (IMRT - Intensity modulated radiation therapy). This module optimizes the plan based on given requirements for doses given to target volumes ... -
Optimering av ReaxFF kraftfeltparametre for germanium
(Master thesis, 2009)Oppgaven er innenfor området beregningsfysikk/-kjemi og vil bestå i å modellere utvalgte systemer (molekyler og bulk krystaller) med relevans for den eksperimentelle aktiviteten ved Institutt for fysikk. Metodene som tas ... -
Optimisation of Positron-Positronium Conversion and Positronium Laser Excitation
(Master thesis, 2015)The AEgIS collaboration (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) at CERN has as its goal to directly measure the Earth's gravitational force on antimatter for the first time. Neutral antihydrogen atoms ... -
Optimising multi-frame ADF-STEM for high-precision atomic-resolution strain mapping
(Journal article; Peer reviewed, 2017)Annular dark-field scanning transmission electron microscopy is a powerful tool to study crystal defects at the atomic scale but historically single slow-scanned frames have been plagued by low-frequency scanning-distortions ... -
Optimising ultrasonic beamforming through solid plates
(Master thesis, 2021)Ultrasoniske verktøy gir en ikke-destruktiv måte å teste integriteten av borehull og sementen som ligger rundt røret. Dagens verktøy tar ikke i bruk dynamisk fokusering, og visse begrensninger på grunn av dette. Å fokusere ... -
Optimization and verification of dosimetric robustness of VMAT dose-plans
(Master thesis, 2016)Radiation therapy has for several years played an important role in the curative management of patients with early stage disease and also in the palliation of symptoms associated with advanced or metastatic disease. Organs ... -
Optimization in CT: Evaluation of dose saving potential in a thorax-abdomen/pelvis protocol using iterative reconstruction techniques
(Master thesis, 2013)The use of computed tomography (CT) has increased dramatically during the last two decades and contributes today to 80% of the estimated population dose caused by radiological examinations. Recent publications have shown ... -
Optimization of diffusion weighted-MRI: a study of T2 and ADC in healthy fibroglandular breast tissue
(Master thesis, 2019)Diffusjonsvektet magnetisk resonansavbildning er blitt stadig mer populært i deteksjon, gradering og evaluering av respons på behandling i brystkreft. Den tilsynelatende diffusjonskonstanten (ADC) reduseres i stor grad i ... -
Optimization of volumetric modulated arc therapy of cervical cancer - Retrospective treatment planning for simultaneous integrated boost, with and without flattening filter
(Master thesis, 2018)The traditional treatment of cervical cancer is external beam radiotherapy (EBRT) combined with brachytherapy (BT) and concomitant chemotherapy. BT is used to boost the primary tumor in the pelvic area towards the end of ... -
Optimization on Matrix Manifolds with Applications to Blind Source Separation
(Master thesis, 2013)Studere hvordan konsepter fra optimeringsteori generaliseres til mangfoldigheter, mer spesifikt matrisemangfoldigheter, og vurdere hvordan dette kan anvendes på "blind source separation"-problemer -
Optimization, Cellular Uptake and Cytotoxicity of Lipid Nanoparticles
(Master thesis, 2016)Chemotherapy can potentially be greatly improved by using nanoparticles as drug carriers to deliver chemotherapeutic drugs specifically to cancer cells. Lipid nanoparticles can encapsulate hydrophobic drugs that have low ... -
Optimized Miniature Two-Photon Microscopy for Imaging Neuronal Activity in Freely Moving Mice
(Master thesis, 2021)Oppfinnelsen av nye avbildningsteknikker har alltid banet vei for påfølgende gjennombrudd i biovitenskapen og det såkalte to-foton mikroskopet er intet unntak. Teknikken muliggjør rask, kalsiumbasert avbildning av ... -
Optimizing an Infrared Camera for Observing Atmospheric Gravity Waves from a CubeSat Platform
(Master thesis, 2012)The NTNU Test Satellite (NUTS) is a double CubeSat deigned by master students at NTNU. The goal of the project is to image atmospheric gravity waves in the OH airglow layer. This thesis explores the theory behind gravity ... -
Optimizing hydroxyl airglow retrievals from long-slit astronomical spectroscopic observations
(Journal article; Peer reviewed, 2017)Astronomical spectroscopic observations from ground-based telescopes contain background emission lines from the terrestrial atmosphere's airglow. In the near infrared, this background is composed mainly of emission from ... -
Optimum operation of wave power converter
(Others, 1976) -
Ordering and Preferred Orientation in Films of Polymeric Semiconductors
(Dr. ingeniøravhandling, 0809-103X; 2002:145, Doctoral thesis, 2003)Various aspects related to molecular ordering and preferred orientation in films of polymeric semiconductors is presented. The polymers poly(alkylthiophene)s (PATs) and poly(3,4- ethylenedioxythiophene)s (PEDOTs), being ...