Browsing Institutt for fysikk by Issue Date

Now showing items 401-420 of 2677

    • X-ray Diffraction and Tomography Studies of Functional Organic Fibres 

      Esmaeili, Morteza (Doktoravhandlinger ved NTNU, 1503-8181; 2013:74, Doctoral thesis, 2013)
      Structural characterisations of materials belong to the primary interests of basic and applied research, since they provide insights into the interactions of molecules and atoms, establish correlations with desired properties ...

    • Flytende tak i en konsertsal 

      Eftevand, Mathias Sandvær (Master thesis, 2013)
      I denne masteroppgaven har det blitt sett på hva som skjer med de vanlige romakustiske parametrene ved å ha et fritthengende flytende tak med åpning mot sideveggene i en konsertsal. Koplingen mellom rommet over og under ...

    • Optimization on Matrix Manifolds with Applications to Blind Source Separation 

      Kvernelv, Vegard Berg (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

    • Investigation of a Water Fraction Meter Based on the High Frequency Electromagnetic Field Technique Using an Uninsulated Inside Coil 

      Boge, Lars Helge (Master thesis, 2013)
      An uninsulated inside coil configuration of the water fraction meter designed by Hammertech AS has been investigated. The general principle behind the water fraction meter is to detect induced eddy currents in conductive ...

    • Selective examination of optically and structurally separable parts within GaAs/AlGaAs core-shell nanowires by micro-photoluminescence and transmission electron microscopy 

      Snustad, Ingrid (Master thesis, 2013)
      GaAs/AlGaAs core-shell nanowires exhibit properties suitable for electronic and opto-electronic applications. In this work, individual parts of Au and self catalyzed nanowires are examined through microphotoluminescence ...

    • Mechanisms Governing the occurrence of Partial Discharges in Insulation Liquids 

      Grav, Torstein (Master thesis, 2013)
      Breakdown of electrical equipment is unwanted and the use of reliable methods of insulation are therefore necessary. Liquid insulation is one preferred material for electrical devices used in subsea installations due to ...

    • Novel Y2O3-codoped Yb/Tm-doped picosecond fiber laser 

      Dvoyrin, Vladislav; Klimentov, Dmitry; Halder, Arindam; Mukul C, Paul; Mrinmay, Pal; Bhadra, Shyamal K; Kir'yanov, Alexander; Sorokina, Irina T (Journal article; Peer reviewed, 2013)
      We demonstrate the novel picosecond mode-locked Y2O3-codoped Yb/Tm-doped fiber lasers, operating at 1950 nm and producing pulses of up to 1 nJ energy, using a SESAM and an Er-doped pump fiber laser operating at the wavelength ...

    • High-energy Mid-Infrared Cr:ZnS Chirped-pulse oscillator 

      Tolstik, Nikolai; Sorokin, Evgeni; Sorokina, Irina T (Chapter; Peer reviewed, 2013)
      Femtosecond coherent light sources emitting in the mid-infrared are of particular interest for a number of applications like environmental sensing, medicine, metrology, material processing and telecommunications. Among the ...

    • Pricing Put Options using Heston's Stochastic Volatility Model 

      Våg, Andreas Brandsøy (Master thesis, 2013)
      The Heston model is a partial differential equation which is used to price options and is a further developed version of the more famous Black-Scholes equation. Heston considers stochastic volatility which results in an ...

    • Bosons and Fermions in Curved Spacetime 

      Sjøstrøm, Dag-Morten (Master thesis, 2013)
      The Klein-Gordon and Dirac equations are formulated for a classical curved background.The equations are then expressed in Friedmann-Robertson-Walker Universe.Further the equations are solved in R×S3 spacetime. We present ...

    • Pressure-induced 0-π transitions and supercurrent crossover in antiferromagnetic weak links 

      Enoksen, Henrik; Linder, Jacob; Sudbø, Asle (Journal article, 2013)
      We compute self-consistently the Josephson current in a superconductor-antiferromagnet-superconductor junction using a lattice model, focusing on 0−π transitions occurring when the width of the antiferromagnetic region ...

    • The Bak-Sneppen Model on coupled complex Networks 

      Suleng, Arne (Master thesis, 2013)
      The goal of this thesis is to study and extend a model of evolution known as the Bak-Sneppen (BS) model.The extensions are done by putting individual models on small and coupled networks and allowing them to interact.To ...

    • Investigation of Transfection Using Silica-coated Cupric Oxide Nanowires 

      Flobak, Åsmund (Master thesis, 2013)
      One-dimensional high aspect ratio nanostructures grown from a copper foil are considered for intracellular delivery of bioactive molecules, such as drugs and genetic material. The cupric oxide (CuO) nanowires are coated ...

    • Watt-level Kerr-Lens Mode-Locked Cr:ZnS Laser at 2.4 μm 

      Tolstik, Nikolai; Sorokin, E; Sorokina, Irina T (Chapter, 2013)
      Power scaling of Kerr-lens mode-locked Cr:ZnS femtosecond oscillator allows reaching 1 W output power and pulse energies over 8 nJ. Soliton and chirped-pulse regimes result in 68 fs and 0.8-2 ps pulses, respectively.

    • Measurements of Optical Parameters at Extraction from the Proton Synchrotron at CERN 

      Ulsrød, Adrian (Master thesis, 2013)
      This thesis concerns the reconstruction of a new set of extraction parameters from the Proton Synchrotron (PS) at CERN. The underlying data was taken from measurement campaigns held in 2012 and 2013, aquired using beam ...

    • Multifactor Interest Rate Models in Low-Rate Environments 

      Hansen, Oyvind Grande (Master thesis, 2013)
      This thesis studies a multi-factor Heath-Jarrow-Morton model and a LIBOR mar-ket model on the Norwegian, European and US interest rate market. The mainconcerns are the low-rate environment and exposure to negative interest ...

    • 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 ...

    • Ultrasound radiation force transport of drugs in tumors 

      Sun, Xianhua (Master thesis, 2013)
      Chemotherapy effectiveness not only depends on drug penetration extent in target tissues or tumor cells, but also depends on drug suppression extent by the normal tissues and cells. Ultrasound acts as an important role to ...

    • Scanning X-ray ScatteringStudies of Mechanically Processed Polymers 

      Granlund, Håvard (Doktoravhandlinger ved NTNU, 1503-8181; 2013:324, Doctoral thesis, 2013)
      Employing raster-scanning small- and wide-angle X-ray scattering (SAXS and WAXS), morphological variations in weakly scattering polymers have been mapped. These techniques inherently yield information on multiple length ...

    • YDFL Operating in 1150-1200-nm Spectral Domain 

      Dvoyrin, Vladislav; Medvedkov, OI; Sorokina, Irina T (Journal article; Peer reviewed, 2013)
      A family of high-power Yb-doped fiber lasers operated in the range of 1150–1180 nm with output powers of up to 35 W and optical efficiencies up to 60% is realized. Operation at 1200 nm is also demonstrated. Amplified ...