Blar i NTNU Open på forfatter "Breiby, Dag Werner"

Viser treff 21-40 av 40

    • Metoder for bildesegmentering av karkanaler og kartlegging av dens struktur for individer med ulik alder 

      Enevoldsen, Caroline (Master thesis, 2018)
      Osteochondrose (OC) er en skjelettsykdom som oppstår i ledd under utvikling hos barn og unge dyr. Den er definert som en fokal forstyrrelse i den endokondrale ossifikasjonen, en prosess for dannelsen av bein og longitudinal ...

    • Microscopical Characterization of Metal-Coated Polymer Microspheres under Mechanical Compression 

      Kongsmo, Rakel (Master thesis, 2013)
      We have performed compression experiments on both metal-coated and uncoated resorcinol-formaldehyde polymer microspheres by a experimental setup developed in-house. Through images obtained from optical microscopy, the ...

    • Modelling Underwater Hyperspectral Images 

      Sørensen, Tord Kriznik (Master thesis, 2017)
      The underwater hyperspectral imager is a new type of imager able to acquire hyperspectral images under water. Common consumer cameras have poor spectral resolution and only captures light in three bands, in the red, green ...

    • Nanoscale imaging of shale fragments with coherent X-ray diffraction 

      Chattopadhyay, Basab; Madathiparambil, Aldritt Scaria; Mürer, Fredrik Kristoffer; Cerasi, Pierre; Chushkin, Yuriy; Zontone, Federico; Gibaud, Alain; Breiby, Dag Werner (Journal article; Peer reviewed, 2020)
      Despite the abundance of shales in the Earth’s crust and their industrial and environmental importance, their microscale physical properties are poorly understood, owing to the presence of many structurally related mineral ...

    • On determining the Poisson's ratio of viscoelastic polymer microparticles using a flat punch test 

      Yu, Haiyang; Kongsmo, Rakel; Patil, Nilesh; He, Jianying; Breiby, Dag Werner; Zhang, Zhiliang (Journal article; Peer reviewed, 2017)
      Microscopic spherical polymer particles are increasingly used in a wide range of areas, including pharmacy, physics and microelectronics. For most of the applications a precise knowledge of the mechanical properties is ...

    • Orientational mapping of minerals in Pierre shale using X-ray diffraction tensor tomography 

      Mürer, Fredrik Kristoffer; Madathiparambil, Aldritt Scaria; Tekseth, Kim Robert Bjørk; Di Michiel, Marco; Cerasi, Pierre; Chattopadhyay, Basab; Breiby, Dag Werner (Peer reviewed; Journal article, 2021)
      Shales have a complex mineralogy with structural features spanning several length scales, making them notoriously difficult to fully understand. Conventional attenuation-based X-ray computed tomography (CT) measures density ...

    • Quantifying the hydroxyapatite orientation near the ossification front in a piglet femoral condyle using X-ray diffraction tensor tomography 

      Mürer, Fredrik Kristoffer; Chattopadhyay, Basab; Madathiparambil, Aldritt Scaria; Tekseth, Kim Robert Bjørk; Di Michel, Marco; Liebi, Marianne; Lilledahl, Magnus Borstad; Olstad, Kristin; Breiby, Dag Werner (Peer reviewed; Journal article, 2021)
      While a detailed knowledge of the hierarchical structure and morphology of the extracellular matrix is considered crucial for understanding the physiological and mechanical properties of bone and cartilage, the orientation ...

    • Quantitative 3D Imaging and Metrology Using Coherent X-ray Scattering 

      Skjønsfjell, Eirik Torbjørn Bakken (Doctoral theses at NTNU;2017:300, Doctoral thesis, 2017)
      This thesis has focused on exploring methods of using coherent X-ray scattering at synchrotron sources. New imaging techniques using coherent X-ray scattering have been investigated, and it has been discussed how limitations ...

    • Quantitative 3D X-ray Imaging of Densification, Delamination and Fracture in a Micro-Composite under Compression 

      Fløystad, Jostein Bø; Skjønsfjell, Eirik Torbjørn Bakken; Guizar-Sicairos, Manuel; Høydalsvik, Kristin; He, Jianying; Andreasen, Jens Wenzel; Zhang, Zhiliang; Breiby, Dag Werner (Journal article; Peer reviewed, 2015)
      Phase-contrast three-dimensional tomograms showing in unprecedented detail the mechanical response of a micro-composite subjected to a mechanical compression test are reported. The X-ray ptychography images reveal the ...

    • Quantitative Polychromatic X-Ray Computed Tomography - Experiments and Simulations 

      Tekseth, Kim Robert Bjørk (Master thesis, 2018)
      X-ray Computed Tomography (CT) is an extensively used technique conventionally utilizing either absorption-contrast or phase-contrast to non-destructively image the internal structures of objects. While CT instruments using ...

    • Real Time 3D Observations of Portland Cement Carbonation at CO2 Storage Conditions 

      Chavez Panduro, Elvia Anabela; Cordonnier, Benoit; Gawel, Kamila; Børve, Ingrid; Iyer, Jaisree; Carroll, Susan; Michels, Leander; Rogowska, Melania; McBeck, Jessica Ann; Sørensen, Henning; Walsh, Stuart; Renard, Francois; Gibaud, Alain; Torsæter, Malin; Breiby, Dag Werner (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, ...

    • Reconstructing surface morphology using coherent X-ray diffraction combined with iterative phase retrieval algorithms 

      Karud, Elisabeth Bruun (Master thesis, 2019)
      Inversjon av spredningsdata er et omfattende problem i røntgenfysikk og gir opphav til faseproblemet. I spredningseksperimenter blir bare intensiteten målt, mens faseinformasjonen er tapt. Rekonstruering av spredningsobjektet ...

    • Simulations of X-ray Propagation in Guiding Structures and Light Scattering From Coccoliths Using Finite Difference Methods 

      Kleiven, David (Master thesis, 2017)
      This thesis consists of two major parts. First, future applications of waveguides in the X- ray regime has been studied numerically. The second part is devoted to the study of light scattering from calcite shells from ...

    • A technique for in situ X-ray computed tomography of deformation-induced cavitation in thermoplastics 

      Olufsen, Sindre Nordmark; Tekseth, Kim Robert Bjørk; Breiby, Dag Werner; Clausen, Arild Holm; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2020)
      Deformation-induced cavitation influences the mechanical response of polymeric materials, but acquiring in situ measurements of the spatial evolution of cavities has typically necessitated the use of synchrotron radiation ...

    • The Effects of Wide-Angle Scattering on Coherent Diffraction Imaging 

      Stene, Sigurd (Master thesis, 2023)
      De potensielle negative effektene av vidvinkel-spredning på fasegjenvinningsprosessen i koherent røntgendiffraksjonsavbildning (CDI) har blitt undersøkt ved bruk av numeriske beregninger. CDI er avbildningsmetode som kan ...

    • Tuning and Tracking of Coherent Shear Waves in Molecular Films 

      Lemke, Henrik Till; Breiby, Dag Werner; Ejdrup, Tine; Hammershøj, Peter; Cammarata, Marco; Khakhulin, Dmitry; Rusteika, Nerijus; Adachi, Shin-Ichi; Koshihara, Shinya; Kuhlman, Thomas Scheby; Mariager, Simon Oddsson; Nielsen, Thomas Nørskov; Wulff, Michael; Sølling, Theis Ivan; Harrit, Niels; Feidenhans'l, Robert; Nielsen, Martin Meedom (Journal article; Peer reviewed, 2018)
      in films as response to femtosecond and picosecond laser pulse heating by timeresolved X-ray diffraction. This method allows a direct absolute determination of the molecular displacements induced by electron−phonon interactions, ...

    • Wide field-of-view Fourier Ptychography microscopy based on Fresnel propagation scheme 

      Hasanzade, Mojde; Breiby, Dag Werner; Akram, Muhammad Nadeem (Peer reviewed; Journal article, 2022)
      Fourier ptychographic microscopy (FPM) is a computational imaging method that gives a significantly increased space-bandwidth product, in practice high resolution combined with a wide field of view. In this article, we ...

    • X-ray computed tomography investigation of dilation of mineral-filled PVC under monotonic loading 

      Olufsen, Sindre Nordmark; Clausen, Arild Holm; Breiby, Dag Werner; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2019)
      The deformation-induced dilation of mineral-filled polyvinyl chloride (PVC) is investigated by means of polychromatic X-ray absorption tomography (XCT). Axisymmetric notched tensile specimens are strained to prescribed ...

    • X-ray nanoscopy of a bulk heterojunction 

      Patil, Nilesh; Skjønsfjell, Eirik Torbjørn Bakken; Van den Brande, Niko; Chavez Panduro, Elvia Anabela; Claessens, Raf; Guizar-Sicairos, Manuel; Van Mele, Bruno; Breiby, Dag Werner (Journal article; Peer reviewed, 2016)
      Optimizing the morphology of bulk heterojunctions is known to significantly improve the photovoltaic performance of organic solar cells, but available quantitative imaging techniques are few and have severe limitations. ...

    • X-ray Scattering Study of Nanostructured GaSb Surfaces 

      Døli, Ellen (Master thesis, 2013)
      In this thesis the surface structure of a sample consisting of slightly tilted, denselypacked Gallium-Antimonide (GaSb) nanocones, self-assembled through Ion Beam Sputtering(IBS) is investigated with a selection of X-ray ...