Browsing Department of Mathematics by Title
Now showing items 104123 of 320

Identification of subsurface structures using electromagnetic data and shape priors
(Elsevier, 201503)We consider the inverse problem of identifying largescale subsurface structures using the controlled source electromagnetic method. To identify structures in the subsurface where the contrast in electric conductivity can ...Journal article 
Ill Posedness Results for Generalized Water Wave Models
(The University of Bergen, 20130603)In the first part of the study, the weak asymptotic method is used to find singular solutions of the shallow water system in both one and two space dimensions. The singular solutions so constructed are allowed to contain ...Master thesis 
Image Denoising Algorithms Based on the Dual Formulation of Total Variation
(The University of Bergen, 20090717)Master thesis 
Image Inpainting using Nonlinear Partial Differential Equations
(The University of Bergen, 20050523)Master thesis 
Image processing, filtering and segmentation of datasets for reservoir simulation
(The University of Bergen, 20131011)Paper A: 2D Visualisation of Unstable Waterflood and Polymer Flood for Displacement of Heavy Oil. Fulltext not available in BORA. The published version is available at: <a href="http://dx.doi.org/10.2118/154292ms" ...Doctoral thesis 
Impact of compressibility in vertically integrated models for CO2 storage
(The University of Bergen, 20120601)Recent work have shown that simplified models obtained by vertical integration give reasonable approximations for CO2 migration. Most of the work previously done on this topic assumes that CO2 is an incompressible fluid, ...Master thesis 
The impact of localscale processes on largescale CO2 migration and immobilization
(Elsevier, 2011)Storage security of injected carbon dioxide (CO2) is an essential component of risk management for geological carbon sequestration operations. During the injection and early postinjection periods, CO2 leakage may occur ...Journal article 
Implications of Protected Areas to Optimal Management of Marine Resources
(The University of Bergen, 2005)The thesis explores how the introduction of a marine protected area influences the optimal management of a marine resource, i.e. fish stock. Logistic growth functions are applied to a deterministic model with a migration ...Master thesis 
Improving the error rates of the Begg and Mazumdar test for publication bias in fixed effects metaanalysis
(BioMed Central, 20140922)Background: The rank correlation test introduced by Begg and Mazumdar is extensively used in metaanalysis to test for publication bias in clinical and epidemiological studies. It is based on correlating the standardized ...Journal article 
Inexact linear solvers for control volume discretizations in porous media
(Springer, 20141203)We discuss the construction ofmultilevel inexact linear solvers for control volume discretizations for porous media. The methodology forms a contrast to standard iterative solvers by utilizing an algebraic hierarchy ...Journal article 
Influence of natural convection in a porous medium when producing from borehole heat exchangers
(WileyAmerican Geophysical Union, 201308)Convection currents in a porous medium form when the medium is subject to sufficient heating from below (or equivalently, cooling from above) or when cooled or heated from the side. In the context of geothermal energy ...Journal article 
Injective braids, braided operads and double loop spaces
(The University of Bergen, 20110601)We construct the category of Bspaces, which is a braided monoidal diagram category. This category is Quillen equivalent to the category of simplicial sets. The induced equivalence of homotopy categories maps a commutative ...Master thesis 
Internal pressure gradient errors in sigmacoordinate ocean models: The finite volume and weighted approaches
(The University of Bergen, 20100426)Terrainfollowing (sigmacoordinate) models are widely used. They are often advantageous when dealing with large variations in topography, and give an accurate representation of the bottom and top boundary layers. However, ...Master thesis 
International Conference on Greenhouse Gas Technologies (GHGT12) Models for CO2 injection with coupled thermal proce
(Elsevier, 2014)Largescale models of carbon dioxide (CO2) storage in geological formations must capture the relevant physical, chemical and thermodynamic processes that affect the migration and ultimate fate of injected CO2. These processes ...Journal article 
Intervall mellom fødslar studert ved "Phase Type Distributions"
(The University of Bergen, 20110531)Omhandlar tida mellom første og andre barn studert ved "Phase Type Distributions". Ser på desse tidene som overlevelsestider og prøver å tilpasse ein phase type fordeling til datasettet me ser på. Brukar også glatting av ...Master thesis 
Inversion of CSEM Data for Subsurface Structure Identification and Numerical Assessment of the Upstream Mobility Scheme
(The University of Bergen, 20150327)Part I In this part of the thesis, two different methodologies for solving the inverse problem of mapping the subsurface electric conductivity distribution using controlled source electromagnetic (CSEM) data are presented. ...Doctoral thesis 
Investigating population genetic structure in a highly mobile marine organism: The minke whale Balaenoptera acutorostrata acutorostrata in the North East Atlantic
(PLoS, 20140930)Inferring the number of genetically distinct populations and their levels of connectivity is of key importance for the sustainable management and conservation of wildlife. This represents an extra challenge in the marine ...Journal article 
Investigations of the KaupBoussinesq model equations for water waves
(The University of Bergen, 20140602)The KaupBoussinesq system is a coupled system of nonlinear partial differential equations which has been derived as a model for surface waves in the context of the Boussinesq scaling, and it has also been derived for an ...Master thesis 
Investigations of the Modified NavierStokes Equations in One Dimension
(The University of Bergen, 20140602)In this thesis we have investigated the BrennerNavierStoke equations in one spatial dimension. These are a modified version of the NavierStokes equations, where the modification relates to a mass diffusion term. This ...Master thesis 
Is there a Ushaped relationship between physical activity in leisure time and risk of chronic low back pain? A followup in the HUNT Study
(BioMed Central, 20160411)Background: Physical activity in leisure time is often considered to have favourable effects on the risk of low back pain (LBP), but demonstrating a definite association in epidemiological studies has proven difficult. The ...Journal article