Blar i Department of Mathematics på tittel
Viser treff 571-590 av 1047
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Multilevel assimilation of inverted seismic data
(Doctoral thesis, 2023-04-14)I ensemble-basert data-assimilering (DA) er størrelsen på ensemblet vanligvis begrenset til hundre medlemmer. Rett frem bruk av ensemble-basert DA kan resultere i betydelig Monte Carlo-feil, som ofte viser seg som alvorlig ... -
Multiple bilinear time series models
(Statistical report no. 11, Research report, 1985-06) -
Multiplicative parametrized homotopy theory via symmetric spectra in retractive spaces
(Journal article; Peer reviewed, 2020)In order to treat multiplicative phenomena in twisted (co)homology, we introduce a new point-set-level framework for parametrized homotopy theory. We provide a convolution smash product that descends to the corresponding ... -
Multipliers of the Dirichlet space
(Master thesis, 2009-11-20)The topic of the thesis is the Dirichlet space of analytic functions in the unit disk and multipliers of this space. We study the elementary properties of multipliers, characterizations of multipliers, univalent multipliers ... -
Multiscale analysis of selected problems in fluid dynamics
(Doctoral thesis, 2017-02-03)The world around us is inherently multiscale. The variety of different models depending on the reference scale is particularly diverse in problems of fluid-solid systems. For those systems, the geometry, effective parameters ... -
A Multiscale Approach to Estimate Large Scale Flow and Leakage from Geological Storage
(Master thesis, 2010-06-01)Deep saline aquifers offer the greatest storage capacity for geological storage. However, the formations might be extensive and because of the oil and gas legacy the aquifers are frequently perforated by abandoned wells. ... -
A multiscale flux basis for mortar mixed discretizations of reduced Darcy-Forchheimer fracture models
(Peer reviewed; Journal article, 2019-05-27)In this paper, a multiscale flux basis algorithm is developed to efficiently solve a flow problem in fractured porous media. Here, we take into account a mixed-dimensional setting of the discrete fracture matrix model, ... -
Multiscale mass conservative domain decomposition preconditioners for elliptic problems on irregular grids
(Peer reviewed; Journal article, 2011-06)Multiscale methods can in many cases be viewed as special types of domain decomposition preconditioners. The localisation approximations introduced within the multiscale framework are dependent upon both the heterogeneity ... -
Multiscale simulation of flow and heat transport in fractured geothermal reservoirs
(Doctoral thesis, 2013-03-04) -
Multiscale Simulation of Non-Darcy Flows
(Chapter; Peer reviewed, 2012-06)In this work we present control volume multiscale methods which address problems on the interaction between pore scale and Darcy scale. For the case when linear equations govern the ow on the pore scale our solution converges ... -
Multivariate and conditional density estimation using local Gaussian approximations
(Doctoral thesis, 2016-09-23)Paper 1 ”Bias and bandwidth for local likelihood density estimation”: A local likelihood density estimator is shown to have asymptotic bias depending on the dimension of the local parameterization. Comparing with kernel ... -
Multivariate compound Poisson distributions and infinite divisibility
(Statistical report no. 33, Research report, 1999-03) -
Multivariate count autoregression
(Journal article; Peer reviewed, 2020)We are studying linear and log-linear models for multivariate count time series data with Poisson marginals. For studying the properties of such processes we develop a novel conceptual framework which is based on copulas. ... -
Mønstre og kvalitet. Analyse av samtaler i matematikkundervisning
(Master thesis, 2015-06-03)Oppgaven diskuterer hvordan man kan analysere samtaler mellom lærer og elever i matematikkundervisning. Deretter diskuterer oppgaven hva som kjennetegner en kvalitativ god samtale. -
Natural Convection in Layered Porous Media between Coaxial Cylinders
(Master thesis, 2015-05-31)In this thesis a mathematical model is developed to describe the onset of natural convection in a two-layer porous medium located between two coaxial cylinders, motivated by natural convection processes in geothermal ... -
Negativ binomisk regresjon med modifiserte sannsynligheter for nullobservasjoner; ZINB og ZANB
(Master thesis, 2013-11-06)Regresjonsmodeller av Poisson- og negativ binomisk fordeling blir ofte brukt til å utføre regresjonsanalyse på datasett innen medisin, biologi, økonomi og mange andre fagfelt. Det oppstår ofte tilfeller der andelen av ... -
Network analysis of Arabidopsis mitochondrial dynamics reveals a resolved tradeoff between physical distribution and social connectivity
(Journal article; Peer reviewed, 2021)Mitochondria in plant cells exist largely as individual organelles which move, colocalize, and interact, but the cellular priorities addressed by these dynamics remain incompletely understood. Here, we elucidate these ... -
New Conceptual Toxicokinetic Model to Assess Synergistic Mixture Effects between the Aromatic Hydrocarbon β-Naphthoflavone and the Azole Nocodazole on the CYP1A Biomarker in a Fish Cell Line
(Journal article; Peer reviewed, 2020)Toxicokinetic interactions with catabolic cytochrome P450 (CYP) enzymes can inhibit chemical elimination pathways and cause synergistic mixture effects. We have created a mathematical bottom-up model for a synergistic ... -
New examples of curves with a one-dimensional family of pencils of minimal degree
(Peer reviewed; Journal article, 2011-07-14)We give a geometric construction of sub-linear systems on a K3 surface consisting of smooth curves C with infinitely many g1 gon(C)’s. -
A new framework for assessing subject-specific whole brain circulation and perfusion using MRI-based measurements and a multi-scale continuous flow model
(Peer reviewed; Journal article, 2019-06-25)A large variety of severe medical conditions involve alterations in microvascular circulation. Hence, measurements or simulation of circulation and perfusion has considerable clinical value and can be used for diagnostics, ...