Now showing items 399-418 of 444

    • Sub-Riemannian geometry of spheres and rolling of manifolds 

      Molina, Mauricio Godoy (The University of Bergen, 2011-04-29)
      Doctoral thesis
    • Sub-semi-Riemannian geometry on Heisenberg-type groups 

      Korolko, Anna (The University of Bergen, 2011-02-04)
      Doctoral thesis
    • Subsea pump vibration analysis for predictive maintenance 

      Rouzbahaneh, Mahdi (The University of Bergen, 2015-11-29)
      The goal of this study is to compare vibration signals of subsea pumps from two different time periods. These signals are gathered for predictive maintenance reasons. Vibration analysis is one of the most efficient tools ...
      Master thesis
    • SUCCESS: SUbsurface CO2 storage–Critical elements and superior strategy 

      Aker, Eyvind; Bjørnarå, Tore Ingvald; Braathen, Alvar; Brandvoll, Øyvind; Dahle, Helge K.; Nordbotten, Jan Martin; Aagaard, Per; Hellevang, Helge; Alemu, Binyam Lema; Pham, Van Thi Hai; Johansen, Harald; Wangen, Magnus; Nøttvedt, Arvid; Aavatsmark, Ivar; Johannessen, Truls; Durand, Dominique (Elsevier, 2011)
      SUCCESS is a Center for Environmental Energy Research in Norway and performs research related to geological storage of CO2 in the subsurface. The SUCCESS centre is established by the Research Council of Norway together ...
      Journal article
    • Supervised Continuous Max-flow for Segmentation of Images with Intensity Inhomogeneities 

      Guo, Junjie (The University of Bergen, 2016-05-26)
      In this thesis we propose a regional adaptive active contour model for segmenting images with intensity inhomogeneities effectively. This model includes a regularization term, a global energy term and a local energy ...
      Master thesis
    • Surface reconstruction Using Probability Based Photo-Consistency 

      Kjørstad, Åsmund (The University of Bergen, 2009-12-04)
      We reconstruct the surface of an object seen from many different angles. We construct an energy functional by using visibility constraints and photo-consistency. This is then solved by the piecewise constant level set method.
      Master thesis
    • Survey strategies to quantify and optimize detecting probability of a CO2 seep in a varying marine environment 

      Hvidevold, Hilde Kristine; Alendal, Guttorm; Johannessen, Truls; Ali, Alfatih Omer Mohammed Ahmed (Elsevier, 2016-09)
      Designing a marine monitoring program that detects CO2 leaks from subsea geological storage projects is challenging. The high variability of the environment may camouflage the anticipated anisotropic signal from a leak and ...
      Journal article
    • Symmetric spaces and Lie triple systems in numerical analysis of differential equations 

      Munthe-Kaas, Hans; Quispel, Reinout; Zanna, Antonella (Springer, 2014-03)
      A remarkable number of different numerical algorithms can be understood and analyzed using the concepts of symmetric spaces and Lie triple systems, which are well known in differential geometry from the study of spaces ...
      Journal article
    • Syntetisk CDO: iTraxx-prising ved bruk av en Normal Invers Gaussisk Copula 

      Nordanå, Kjetil Sørlien (The University of Bergen, 2013-04-04)
      I denne oppgaven skal vi se at det er et stort marked for kredittderivater etter finanskrisen, men da i en vridning mot syntetiske varianter. Men framtidsutsiktene er usikre, da disse produktene er i en særstilling ...
      Master thesis
    • Tensor Induction as Left Kan Extension 

      Aye, Kaythi (The University of Bergen, 2014-12-02)
      Master thesis
    • Testmetoder for identifisering av publikasjonsbias i metaanalyser 

      Gjerdevik, Miriam (The University of Bergen, 2012-10-24)
      Testmetoder for identifisering av publikasjonsbias i metaanalyser.
      Master thesis
    • Theta-Regularity and Log-Canonical Threshold 

      Øygarden, Morten (The University of Bergen, 2018-05-30)
      The log-canonical threshold is an invariant that is widely used in modern birational geometry. It contains information regarding the singularities of sheaves of ideals. The theta-regularity index is a regularity condition ...
      Master thesis
    • Thickness and weak integrability & approximation and u-ideals 

      Abrahamsen, Trond Arnold (The University of Bergen, 2007-06-15)
      Doctoral thesis
    • Time Series: Forecasting and Evaluation Methods With Concentration On Evaluation Methods for Density Forecasting 

      Grindheim, Therese (The University of Bergen, 2018-06-06)
      The main focus of this thesis are density forecasts and the corresponding evaluation methods. A density forecast is an estimate of the probability density of predicted values. Density forecasts and the related evaluation ...
      Master thesis
    • Tokamerarekonstruksjon og Gröbnerbasar 

      Slinde, Kristine Njøs (The University of Bergen, 2016-06-01)
      I denne oppgåva skal me sjå på korleis ein skal gå fram for å rekonstruere ei scene frå to bilete. Dette kan brukast når ein skal evaluere satellittbilete og gjere ei kalibrering av kamera. Me skal sjå på geometrien og ...
      Master thesis
    • Total Variation Regularization of Matrix-Valued Images 

      Christiansen, Oddvar; Lee, Tin-Man; Lie, Johan; Sinha, Usha; Chan, Tony F. (Hindawi Publishing Corporation, 2007)
      We generalize the total variation restoration model, introduced by Rudin, Osher, and Fatemi in 1992, to matrix-valued data, in particular, to diffusion tensor images (DTIs). Our model is a natural extension of the color ...
      Peer reviewedJournal article
    • Trigonometric interpolation on lattice grids 

      Sørevik, Tor; Nome, Morten (Springer, 2015)
      In this paper we construct non-aliasing interpolation spaces and Lagrange functions for lattice grids. We argue that lattice grids are good for trigonometric interpolation and support this claim by numerical experiments. ...
      Journal article
    • Two Level Additive Schwarz Preconditioner For Control Volume Finite Element Methods 

      Gundersen, Kristian (The University of Bergen, 2010-09-22)
      In this thesis we investigate nummerically the convergence properties of the control volume finite element method (CVFEM) preconditioned with a two level overlapping additive Schwarz method. Relevant theory regarding the ...
      Master thesis
    • Two phase flow including interfacial area as a variable 

      Nordhaug, Hans Fredrik; Dahle, Helge K.; Espedal, Magne S.; Gray, William G.; Celia, Michael A. (The XIII international conference on computational methods in water resources, 2000)
      Based on the procedure of (Gray & Hassanizadeh 1998) we state macroscale conservation equations for multi phase flow in porous media including interfacial area as a variable. The phases we consider are a solid phase, a ...
      Journal article
    • Two-phase flow in porous media: dynamic capillarity and heterogeneous media 

      van Duijn, Cornelius J.; Cao, Xiulei; Pop, Iuliu Sorin (Springer, 2015-08-11)
      We investigate a two-phase porous media flow model, in which dynamic effects are taken into account in phase pressure difference. We consider a one-dimensional heterogeneous case, with two adjacent homogeneous blocks ...
      Journal article