Browsing Department of Mathematics by Title
Now showing items 509-528 of 678
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Quality of the Analysis Step in EnKF
(Master thesis, 2011-06-15)In many physical applications we want to characterize the parameters of a system based on indirect observations or measurements. In a reservoir simulator setting, the goal is to simulate the production of hydrocarbons from ... -
Quantifying uncertainties when monitoring marine environments in connection with geological storage of CO2
(Doctoral thesis, 2015-06-26) -
Radial processes for sub-Riemannian Brownian motions and applications
(Journal article; Peer reviewed, 2020)We study the radial part of sub-Riemannian Brownian motion in the context of totally geodesic foliations. Itô’s formula is proved for the radial processes associated to Riemannian distances approximating the Riemannian ... -
Radielle basisfunksjoner som adaptiv kollokasjonsmetode
(Master thesis, 2014-06-01)Hensikten med oppgaven er å undersøke en adaptiv kollokasjonsmetode basert på radielle basisfunksjoner. Målet er å finne ut om man med enkle kriterier for senter- og formparameterfordelingen kan oppnå en fordeling som ... -
A random exchange model with constant decrements.
(Department of Applied Mathematics report, Research report, 1974-12) -
Rate of Convergence for some constraint Dcomposition methods for nonlinear variational inequalities.
(Department of Applied Mathematics report, Research report, 2000-10) -
Rate of Convergence for Subspace Correction Methods for nonlinear Variational Inequalities
(Department of Applied Mathematics report, Research report, 1999-09) -
Rate of Convergence of a Space Decomposition method and Applications to Linear and Nonlinear Elliptic Problems
(Department of Applied Mathematics report, Research report, 1996-09) -
Reactivation of fractures in subsurface reservoirs - A numerical approach using a static-dynamic friction model
(Chapter; Peer reviewed; Journal article, 2019)Fluid-induced slip of fractures is characterized by strong multiphysics couplings. Three physical processes are considered: Flow, rock deformation and fracture deformation. The fractures are represented as lower-dimensional ... -
Reactive Transport in Porous Media
(Master thesis, 2011-08-01)In this thesis, we show how the common equations for flow in porous media can be expanded to account for geochemical reactions. Furthermore, the complications arising when solving the new equations numerically are described ... -
Reconstructing Open Surfaces via Graph-Cuts
(2011)A novel graph-cuts-basedmethod is proposed for reconstructing open surfaces from unordered point sets. Through a boolean operation on the crust around the data set, the open surface problem is translated to a watertight ... -
Recursions for Convolutions of discrete uniform Distributions revisited
(Statistical report no. 32, Research report, 1997-09) -
Reexamining CO2 Storage Capacity and Utilization of the Utsira Formation
(Conference object, 2014)In this work we provide estimates of CO2 storage capacity of the Utsira Formation using the recently provided datasets from the Norwegian Petroleum Directorate, taking CO2 density variation into account. We also investigate ... -
Regresjonsmodeller i skipsforsikring
(Master thesis, 2009-09-15)Masteroppgaven tar utgangspunkt i et datasett fra skipsforsikring og undersøker hva slags modeller som passer til skadefrekvensen for dette datasettet. Hovedfokuset for masteroppgaven vil være på generalisert lineært miksede ... -
Rekneark på ungdomstrinnet
(Master thesis, 2014-06-06)Problemstillinga i oppgåva var korleis opplever elevane bruk av rekneark i matematikk på ungdomstrinnet. Gjennom eitt år vart ulike reknearkoppgåver prøvd ut i 9./10. klasse. I etterkant henta eg inn data ved hjelp av ... -
Relationship between headaches and tinnitus in a Swedish study
(Journal article; Peer reviewed, 2020-05)The heterogeneity of tinnitus is likely accounting for the lack of effective treatment approaches. Headaches have been related to tinnitus, yet little is known on how headaches impact tinnitus. We use cross-sectional data ... -
Renal Function Estimation using Magnetic Resonance Images
(Master thesis, 2009-06-02)This study is aimed at testing the use of Magnetic Resonance (MR) images and mathematical models for renal parameter estimation. The study was based on four models; the Patlak model, Cortical Compartment model, Separable ... -
Reversible Jump Markov Chain Monte Carlo: Some Theory and Applications
(Master thesis, 2014-03-10)The history of MCMC, theories of Bayesian thinking and model choice, the Accept- Reject-algorithm, Markov chains, the Metropolis- Hastings-algorithm and the reversible jump MCMC are explained. Then the reversible jump MCMC ... -
Risk of Leakage versus Depth of Injection in Geological Storage
(Peer reviewed; Journal article, 2009-02)One of the outstanding challenges for large-scale CCS operations is to develop reliable quantitative risk assessments with a focus on leakage of both injected CO2 and displaced brine. A critical leakage pathway is associated ...