Now showing items 109-128 of 436

    • A Fast Continuous Max-Flow Approach to Non-Convex Multilabeling Problems 

      Bae, Egil; Yuan, Jing; Tai, Xue-Cheng; Boykov, Yuri (The authors, 2011)
      This work addresses a class of multilabeling problems over a spatially continuous image domain, where the data fidelity term can be any bounded function, not necessarily convex. Two total variation based regularization terms ...
    • Fast Image Segmentation Using Variational Optimization Methods With Edge Detector 

      Stanislaus, Mary Gerina (The University of Bergen, 2014-06-02)
      In this work, we apply techniques in variational optimization to image segmentation. We study three different segmentation models: one is based on the active contour method, the second is based on a piecewise constant level ...
      Master thesis
    • Feasibility of simplified integral equation modeling of low-frequency marine CSEM with a resistive target 

      Bakr, Shaaban Ali; Mannseth, Trond (Society of Exploration Geophysicists, 2009)
      We have assessed the accuracy of a simplified integral equation (SIE) modeling approach for marine controlledsource electromagnetics (CSEM) with low applied frequencies and a resistive target. The most computationally ...
      Peer reviewedJournal article
    • Field-case simulation of CO2-plume migration using vertical-equilibrium models 

      Nilsen, Halvor Møll; Herrera, Paulo; Ashraf, Seyed Meisam; Ligaard, Ingeborg S.; Iding, Martin; Hermanrud, Christian; Lie, Knut-Andreas; Nordbotten, Jan Martin; Dahle, Helge K.; Keilegavlen, Eirik (Elsevier, 2011)
      When injected in deep saline aquifers, CO2 moves radially away from the injection well and progressively higher in the formation because of buoyancy forces. Analyzes have shown that after the injection period, CO2 will ...
      Journal article
    • Finite volume hydromechanical simulation in porous media 

      Nordbotten, Jan Martin (Wiley, 2014-05-27)
      Cell-centered finite volume methods are prevailing in numerical simulation of flow in porous media. However, due to the lack of cell-centered finite volume methods for mechanics, coupled flow and deformation is usually ...
      Journal article
    • Finite volume methods for elasticity with weak symmetry 

      Keilegavlen, Eirik; Nordbotten, Jan Martin (Wiley, 2017-11)
      We introduce a new cell‐centered finite volume discretization for elasticity with weakly enforced symmetry of the stress tensor. The method is motivated by the need for robust discretization methods for deformation and ...
      Journal article
    • Finite-Element Modelling of Buoyancy-Driven Flow in Natural Geothermal Systems 

      Saltnes, Marie Horn (The University of Bergen, 2010-05-27)
      Finite element modelling of buoyancy driven flow in geothermal systems is presented in this thesis. The main focus is on the development of a numerical modelling tool. The program developed is tested for classical benchmarks ...
      Master thesis
    • Fish louse and treatment options: A mathematical approach 

      Utåker, Therese Sjøstrøm (The University of Bergen, 2018-09-04)
      Master thesis
    • The Flow of Quasiconformal Mappings on S³ with Contact structure and a Family of Surfaces on the Heisenberg Group 

      Lavrichenko, Ksenia (The University of Bergen, 2011-05-31)
      Master thesis
    • Flow Properties of Fully Nonlinear Model Equations for Surface Waves 

      Khorsand, Zahra (The University of Bergen, 2017-11-03)
      The focus of this thesis is wave motion in shallow water. In particular, we investigate some properties of flows underneath long waves in shallow water and present the results in two parts. The first part contains a ...
      Doctoral thesis
    • Forståelse av matematiske tekstoppgaver. Hva bør man som lærer ha tenkt gjennom når man ønsker at elevene skal jobbe med tekstoppgaver i matematikk? 

      Stordrange, Kjetil Kjellesvik (The University of Bergen, 2018-06-21)
      Denne studien tar for seg matematiske tekstoppgavers oppbygning og ser på ulike typer utfordringer elever kommer over i møte med tekstoppgaver. Utfordringene handler i stor grad om det å oversette teksten i tekstoppgaver ...
      Master thesis
    • Fourier analysis on abelian groups; theory and applications 

      Odland, Tommy (The University of Bergen, 2017)
      Fourier analysis expresses a function as a weighted sum of complex exponentials. The Fourier machinery can be applied when a function is defined on a locally compact abelian group (LCA). The groups R, T = R / Z, Z and Z_n ...
      Master thesis
    • Fractal structures in freezing brine 

      Alyaev, Sergey; Keilegavlen, Eirik; Nordbotten, Jan Martin; Pop, Iuliu Sorin (Cambridge University Press, 2017-09)
      The process of initial ice formation in brine is a highly complex problem. In this paper, we propose a mathematical model that captures the dynamics of nucleation and development of ice inclusions in brine. The primary ...
      Journal article
    • Fully-implicit simulation of vertical-equilibrium models with hysteresis and capillary fringe 

      Nilsen, Halvor Møll; Lie, Knut-Andreas; Andersen, Odd (Springer, 2016-02)
      Geological carbon storage represents a new and substantial challenge for the subsurface geosciences. To increase understanding and make good engineering decisions, containment processes and large-scale storage operations ...
      Journal article
    • Fører omvendt undervisning til høyere læringsutbytte? 

      Haugen, Knut Åge (The University of Bergen, 2017-12-20)
      Omvendt undervisning blir mer og mer populært. Omvendt undervisning er en undervisningsmetode hvor gjennomgangen av nye temaer gjøres ved at elevene ser en videoforelesning hjemme, når eleven kommer på skolen vil fokuset ...
      Master thesis
    • GAMLSS-modeller i bilforsikring 

      Røyrane-Løtvedt, Hallvard (The University of Bergen, 2012-06-01)
      I denne oppgaven tester jeg ulike modeller for prediksjon av total skadeutbetaling fra forsikringsselskap til forsikringstaker i et poliseår. Modellene som testes hører til rammeverket Generalized Additive Models for ...
      Master thesis
    • Gasslekkasjar i Marine miljø 

      Aase, Stig Andre (The University of Bergen, 2012-06-19)
      I denne masteroppgåva studerast fluidstrøymingar gjennom marine sediment, og målet er å vurdere om ein enkel matematisk modell klarar å beskrive og bevare karakteristiske trekk for prosessen. Denne drøftinga vil baserast ...
      Master thesis
    • General Slit Stochastic Löwner Evolution and Conformal Field Theory 

      Tochin, Alexey (The University of Bergen, 2016-01-22)
      Doctoral thesis
    • Generated Sound Waves in Corrugated Pipes 

      Lillejord, Arve (The University of Bergen, 2012-06-01)
      This paper studies sound waves generated in corrugated pipes by using computational fluid dynam- ics. The author did not have any prior experience in computational fluid dynamics and therefore a substantial part was ...
      Master thesis
    • Generating function and volume preserving mappings 

      Xue, Huiyan; Zanna, Antonella (The American Institute of Mathematical Sciences, 2014-03)
      In this paper, we study generating forms and generating functions for volume preserving mappings in Rn. We derive some parametric classes of volume preserving numerical schemes for divergence free vector fields. In passing, ...
      Peer reviewed