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Bergen Open Research Archive

Browsing Department of Mathematics by Title

Bergen Open Research Archive

Browsing Department of Mathematics by Title

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  • Bae, Egil; Yuan, Jing; Tai, Xue-Cheng; Boykov, Yuri (Preprint, 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 ...
  • Stanislaus, Mary Gerina (Master thesis, 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 ...
  • Bakr, Shaaban Ali; Mannseth, Trond (Peer reviewed; Journal article, 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 ...
  • 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 (Journal article, 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 ...
  • Saltnes, Marie Horn (Master thesis, 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 ...
  • Nordbotten, Jan Martin (Journal article, 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 ...
  • Lavrichenko, Ksenia (Master thesis, The University of Bergen, 2011-05-31)
  • Røyrane-Løtvedt, Hallvard (Master thesis, 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 ...
  • Aase, Stig Andre (Master thesis, 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 ...
  • Lillejord, Arve (Master thesis, 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 ...
  • Xue, Huiyan; Zanna, Antonella (Peer reviewed, 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, ...
  • Haaland, Øystein; Glover, Kevin; Seliussen, Bjørghild Breistein; Skaug, Hans J. (Peer reviewed; Journal article, BioMed Central, 2011-04-20)
    Background: The use of DNA methods for the identification and management of natural resources is gaining importance. In the future, it is likely that DNA registers will play an increasing role in this development. Microsatellite ...
  • Ashraf, Meisam (Doctoral thesis, The University of Bergen, 2014-04-10)
    Geological CO2 storage has the potential to be a key technology for prevention of industrial CO2 emission into the atmosphere. A successful storage operation requires safe geological structures with large storage ...
  • Bae, Egil; Yuan, Jing; Tai, Xue-Cheng (Peer reviewed; Journal article, Springer-Verlag, 2010)
    This paper is devoted to the optimization problem of continuous multi-partitioning, or multi-labeling, which is based on a convex relaxation of the continuous Potts model. In contrast to previous efforts, which are ...
  • Topphol, Vegard (Master thesis, The University of Bergen, 2011-06-01)
    Oppgåva omhandlar numeriske integrasjonsreglar av trigonometrisk grad kalla latticereglar, med særskild fokus på å utvikle og teste algoritmer for å finne gode latticereglar av rank 1. For at teksten skal kunne stå ...
  • Sæbø, Gard (Master thesis, The University of Bergen, 2012-05-31)
    In this masterthesis we study the geometry of the points in the Brill-Noether locus. Typically, we want to study the gonality of points in this locus, that can be seen as projective curves. We also study what curves ...
  • Reisæter, Lars Aga (Master thesis, The University of Bergen, 2006-11)
  • Willgohs, Niejing (Master thesis, The University of Bergen, 2010-11-19)
    In this thesis, I first present the grassland birds data from Wells(2007) which is used by several different methods of estimating the nest survival rates. The hierarchical Bayesian method from Cao(2009) then is introduced ...
  • Xue, Huiyan (Journal article, Huiyan Xue, 2013)
    In this paper, we focus on construction of high order volume preserving integrators for divergence-free vector fields of the monomial basis, exponential basis and tensor product of the monomial and exponential basis. We ...
  • Albrektsen, Grethe; Heuch, Ivar; Thoresen, Steinar Ø. (Peer reviewed; Journal article, BioMed Central, 2010-05-21)
    Background Some studies have indicated that reproductive factors affect the risk of histological types of breast cancer differently. The long-term protective effect of a childbirth is preceded by a short-term adverse ...

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