Browsing NTNU Open by Author "Breiby, Dag Werner"
Now showing items 1-20 of 40
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3D Maps of Mineral Composition and Hydroxyapatite Orientation in Fossil Bone Samples Obtained by X-ray Diffraction Computed Tomography
Mürer, Fredrik Kristoffer; Sanchez, Sophie; Alvarez-Murga, Michelle; Di Michiel, Marco; Pfeiffer, Franz; Bech, Martin; Breiby, Dag Werner (Journal article; Peer reviewed, 2018)Whether hydroxyapatite (HA) orientation in fossilised bone samples can be non-destructively retrieved and used to determine the arrangement of the bone matrix and the location of muscle attachments (entheses), is a question ... -
Closing of Micro-cavities in Well Cement upon Exposure to CO2 Brine
Chavez Panduro, Elvia Anabela; Torsæter, Malin; Gawel, Kamila; Bjørge, Ruben; Gibaud, Alain; Yang, Yi; Sørensen, Henning; Frykman, Peter; Kjøller, Claus; Breiby, Dag Werner (Journal article; Peer reviewed, 2017)Long-lasting cement plugging of wells is crucial for successful CO2 storage in underground reservoirs. It requires a profoundly improved understanding of the behavior of fractured cement under realistic subsurface conditions ... -
Comparing laboratory and field samples of lime-cement improved Norwegian clay
Paniagua Lopez, Ana Priscilla; Falle, F. A.; Sølve, Hov; Tekseth, Kim Robert Bjørk; Mirzaei, Fazel; Breiby, Dag Werner (Journal article; Peer reviewed, 2022) -
Computed X-ray Tomography Study of Carbonate Precipitation in Large Portland Cement Pores
Chavez Panduro, Elvia Anabela; Torsæter, Malin; Gawel, Kamila; Bjørge, Ruben; Gibaud, Alain; Bonnin, Anne; Schlepütz, Christian M.; Breiby, Dag Werner (Journal article; Peer reviewed, 2019)Cement degradation caused by CO2 exposure is an increasingly important environmental challenge that must be understood, for example, if former oil reservoirs are to be used for CO2 storage. When exposed to CO2-saturated ... -
Degradation of the chemotherapy drug 5-fluorouracil on medical-grade silver surfaces
Risinggård, Helene Kjær; Cooil, Simon Phillip; Mazzola, Federico; Hu, Di; Kjærvik, Marit; Østli, Elise Ramleth; Patil, Nilesh; Preobrajenski, Alexei; Evans, Andrew; Breiby, Dag Werner; Trinh, Thuat; Wells, Justin (Journal article; Peer reviewed, 2018) -
Developing Methods and Tools for Three-Dimensional Computational Reconstructions in X-ray and Visible Light Microscopy
Kringeland, Torbjørn (Master thesis, 2015)In this thesis possibilities for further developments in microscopy have been explored. This was done through two sub-projects: The first project was on small-angle X-ray (SAXS) tomography, and the second revolved around ... -
Diffractive X-ray Tomography of Oriented Mineralized Structures Doctoral thesis in Hierarchical Materials
Mürer, Fredrik Kristoffer (Doctoral theses at NTNU;2021:112, Doctoral thesis, 2021)Many materials around us in everyday life have a hierarchical structure, meaning that defining structural features are found at multiple length scales, often ranging from the molecular to the macroscopic scale, together ... -
Diffuse Small Angle X-Ray Scattering From Thin Film Structures In the Distorted Wave Born Approximation
Reiten, Andreas Lønning (Master thesis, 2011)The differential scattering cross section for diffuse scattering of X-rays from thinfilm structures is discussed within the framework of the distorted wave Born ap-proximation (DWBA). In contrast to the standard Born ... -
Dynamic Micro-CT utilising Golden Ratio Sampling and Three-dimensional Generative Adversarial Networks
Dragland, Ruben Skjelstad (Master thesis, 2023)Temporal datatomografi, dynamisk datatomografi, eller bare 4D-CT, er en røntgenavbildningsteknikk hvor tredimensjonale dynamiske prosesser kan avbildes. Ulempen med CT er de mange projeksjonene som kreves for å rekonstruere ... -
Exploring avenus for compressed sensing in X-ray tomography
Kolstø, Magnus Bro (Master thesis, 2018)In this paper different ways to reduce the amount of data associated with tomographic scans were explored. The L-BFGS algorithm was tested using a SIRT back-projection as its gradient. It showed faster and better convergence ... -
Fourier ptychography algorithm based on scaled Fourier transform
Hasanzade, Mojde; Hussain, Nazabat; Breiby, Dag Werner; Akram, Muhammad Nadeem (Peer reviewed; Journal article, 2021)This letter discusses an alternative Fourier ptychography algorithm based on the scaled fast Fourier transform propagation. The advantage of this scheme is that it enables a zoom-in capability of the object spectrum and ... -
GPU-Accelerated Visualization of Scattered Point Data
Falch, Thomas Løfsgaard; Fløystad, Jostein Bø; Breiby, Dag Werner; Elster, Anne C. (Journal article; Peer reviewed, 2013)As data sets continue to grow in size, visualization has become a vitally important tool for extracting meaningful knowledge. Scattered point data, which are unordered sets of point coordinates with associated measured ... -
High-energy X-ray Tomography for 3D Void Characterization in Au–Sn Solid-Liquid Interdiffusion (SLID) Bonds
Aasmundtveit, Knut; Tekseth, Kim Robert Bjørk; Breiby, Dag Werner; Nguyen, Hoang-Vu (Chapter; Peer reviewed, 2019)Au-Sn SLID bonding is a technique originally developed for harsh environment applications. The technology has recently shown promising results for ultrasound transducer fabrication. Characterizing the spatial and size ... -
High-Performance X-ray Scattering Simulations
Havdal, Mathias (Master thesis, 2018)This thesis is part of a larger project in the field of computational microscopy. Its main contribution is to facilitate the implementation of high performance tools to assist in the understanding and simulation of microscopic ... -
High-resolution polarization-sensitive Fourier ptychography microscopy using a high numerical aperture dome illuminator
Gholamimayani, Mahdieh; Tekseth, Kim Robert Bjørk; Breiby, Dag Werner; Klein, Joern; Akram, Muhammad Nadeem (Peer reviewed; Journal article, 2022)Polarization-sensitive Fourier-ptychography microscopy (pFPM) allows for high resolution imaging while maintaining a large field of view, and without mechanical movements of optical-setup components. In contrast to ordinary ... -
Improved resolution Fourier ptychography scheme using oil-filled dome-shaped LED array
Gholamimayani, Mahdieh; Hussain, Nazabat; Breiby, Dag Werner; Akram, Muhammad Nadeem (Peer reviewed; Journal article, 2022)Utilising angular-varied illumination in Fourier Ptychography, the resolution of optical microscopes can be increased and the phase of the sample can also be recovered while maintaining a wide field-of-view. In this work, ... -
In situ coherent X-ray diffraction imaging of radiation-induced mass loss in metal-polymer composite spheres
Skjønsfjell, Eirik Torbjørn Bakken; Chushkin, Yuriy; Zontone, Federico; Breiby, Dag Werner (Peer reviewed; Journal article, 2018)A major limitation to the use of coherent X-ray diffraction imaging (CXDI) for imaging soft materials like polymers and biological tissue is that the radiation can cause extensive damage to the sample under investigation. ... -
In-situ µ-CT of well cement exposed to CO2-saturated water at high pressure and temperature
Børve, Ingrid (Master thesis, 2018)Large-scale implementation of carbon dioxide (CO2) sequestration in depleted oil and gas reservoirs may potentially mitigate global climate change. However, successful CO2 storage is contingent on a limited leakage through ... -
Laser recrystallization and inscription of compositional microstructures in crystalline SiGe-core fibres
Coucheron, David Andre; Fokine, Michael; Patil, Nilesh; Breiby, Dag Werner; Buset, Ole Tore; Healy, Noel; Peacock, Anna; Hawkins, Thomas A.; Jones, Maxwell; Ballato, John; Gibson, Ursula (Journal article; Peer reviewed, 2016)Glass fibres with silicon cores have emerged as a versatile platform for all-optical processing, sensing and microscale optoelectronic devices. Using SiGe in the core extends the accessible wavelength range and potential ... -
Mapping Orientation Distribution of Talc Particles in Polypropylene by Small-Angle X-ray Scattering Tomography
Skjønsfjell, Eirik Torbjørn Bakken (Master thesis, 2013)Small-angle X-ray scattering tomography has for the first time been used toinvestigate the spatially resolved orientation distribution of talc particles in asample of injection molded isotactic polypropylene, where the ...