Browsing Department of Mathematics by Title
Now showing items 750-769 of 1118
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On the use of vertically averaged models to simulate CO2 migration in a layered saline aquifer
(Master thesis, 2010-06-01)Geologic and flow characteristics such as permeability and porosity, capillary pressure, geologic structure, and thickness all influence and affect CO2 plume distribution to varying degrees. These parameters do not necessarily ... -
On weak solutions and a covergent numerical scheme for the compressible Navier-Strokes Equations
(Journal article, 2015-02-26)In this paper, the three-dimensional compressible Navier-Stokes equations are considered on a periodic domain. We propose a semi-discrete numerical scheme and derive a priori bounds that ensures that the resulting system ... -
Open-source MATLAB implementation of consistent discretisations on complex grids
(Peer reviewed; Journal article, 2011-08-02)Accurate geological modelling of features such as faults, fractures or erosion requires grids that are flexible with respect to geometry. Such grids generally contain polyhedral cells and complex grid-cell connectivities. ... -
An Open-Source Toolchain for Simulation and Optimization of Aquifer-Wide CO2 Storage
(Peer reviewed; Journal article, 2016-02-04)Planning and execution of large-scale, aquifer-wide CO2 storage operations will require extensive use of computer modelling and simulations. The required computational tools will vary depending on the physical characteristics ... -
An Operator Splitting Method for Convection-Diffusion Equations
(Department of Applied Mathematics report, Research report, 1996-01) -
Operator Splitting Methods for Degenerate Convection-Diffusion Equations I: Convergence and Entropy Estimates
(Department of Applied Mathematics report, Research report, 1999-10) -
Operator splitting Methods for degenerate Convection-diffusion Equations II: Numerical Examples with Emphasis on Reservoir Simulation and Sedimentation
(Department of Applied Mathematics report, Research report, 1999-12) -
Operator splitting methods for systems of convection-diffusion equations: nonlinear error mechanisms and correction strategies
(Peer reviewed; Journal article, 2001)Many numerical methods for systems of convection-diffusion equations are based upon an operator splitting formulation, where convective and diffusive forces are accounted for in separate substeps. We describe the nonlinear ... -
Oppfatningar og misoppfatningar i sannsyn: Ein mixed methods-studie av elevar på vidaregåande trinn – yrkesfagleg retning
(Master thesis, 2016-01)Denne masteroppgåva handlar om korleis elevar på vidaregåande trinn – yrkesfagleg retning forstår omgrep innafor sannsyn. Føremålet har vore å avdekkja kva oppfatningar og misoppfatningar elevane har og kva løysingsstrategiar ... -
«Oppfatter ikke matematikk som nyttig for min del, siden filmregissører har ikke særlig bruk for faget». En kvantitativ studie av Vg1-elever sine oppfatninger om matematikkfagets nytteverdi
(Master thesis, 2018-06-20)Elever sine oppfatninger om matematikk er med på å påvirke læringen i faget. I undervisningstimene kommer ofte spørsmålet om lærestoffet sin relevans opp, og hvilken nytteverdi eleven har av det som skal læres. Samtidig ... -
Opplevelser og følelser ved problemløsning i matematikk
(Master thesis, 2022-02-03) -
Optimal design of photovoltaic power plants
(Master thesis, 2018-05-30)The configuration of the photovoltaic panels is important to maximize the energy output of a photovoltaic power plant. In this thesis, I have developed an algorithm calculating the optimal solution for the design of a solar ... -
Optimal dividend policies for a class of growth-restricted di usion processes under transaction costs and solvency constraints
(Peer reviewed; Journal article, 2012)In this paper, we consider a company where surplus follows a rather general di usion process and whose objective is to maximize expected discounted dividend payments. With each dividend payment there are transaction costs ... -
Optimal dividend policies with transaction costs for a class of jump-diffusion processes
(Peer reviewed; Journal article, 2012)This paper addresses the problem of finding an optimal dividend policy for a class of jump-diffusion processes. The jump component is a compound Poisson process with negative jumps, and the drift and diffusion components ... -
Optimal Portfolio management Rules in a Non-Gaussian Market with Durability and intertemporal Substitution
(Department of Applied Mathematics report, Research report, 2000-05) -
Optimal sensors placement for detecting CO2 discharges from unknown locations on the seafloor
(Journal article; Peer reviewed, 2020-04)Assurance monitoring of the marine environment is a required and intrinsic part of CO2 storage project. To reduce the costs related to the monitoring effort, the monitoring program must be designed with optimal use of ... -
Optimal strategies in the Fighting Fantasy gaming system: influencing stochastic dynamics by gambling with limited resource
(Journal article; Peer reviewed, 2022)In many games and other processes, participants can choose to intervene in some way that does not follow the usual progress of the game (for example, cheating at cards, or spying on rivals) which may provide benefits, but ... -
Optimisation of Production From an Oil-Reservoir Using Augmented Lagrangian Methods
(Doctoral thesis, 2008-02-18)This work studies the use of augmented Lagrangian methods for water flooding production optimisation from an oil reservoir. Commonly, water flooding is used as a means to enhance oil recovery, and due to heterogeneous rock ... -
Optimization of CO2 Geological Storage Cost
(Master thesis, 2013-12-01)Carbon dioxide capture and storage (CCS) is a promising strategy to battle the climate change by injecting large-scale of carbon dioxide back to underground formations and storing the carbon dioxide possibly permanently. ... -
Organelle bottlenecks facilitate evolvability by traversing heteroplasmic fitness valleys
(Journal article; Peer reviewed, 2022)Bioenergetic organelles—mitochondria and plastids—retain their own genomes (mtDNA and ptDNA), and these organelle DNA (oDNA) molecules are vital for eukaryotic life. Like all genomes, oDNA must be able to evolve to suit ...