Browsing Department of Mathematics by Title
Now showing items 348-367 of 1050
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Good ethics or political and cultural censoring in science?
(Peer reviewed; Journal article, 2012)Peer-reviewed journals are the cornerstones to communicating scientific results. They play a crucial role in quality assurance through the review process, but they also create opportunities for discussions in the scientific ... -
Gradient Methods for Source Identification Problems
(Master thesis, 2020-08-19)In this thesis we are interested in the problem of identifying point sources in an advection-diffusion model, given some measurements. By writing the problem as a minimization problem, we use a non-linear conjugate gradient ... -
Graph Constructions for the Contact Process with a Prescribed Critical Rate
(Journal article; Peer reviewed, 2021)We construct graphs (trees of bounded degree) on which the contact process has critical rate (which will be the same for both global and local survival) equal to any prescribed value between zero and λc(Z), the critical ... -
Gravity currents at Ormen Lange
(Department of Applied Mathematics report, Research report, 2001-12) -
Guaranteed and computable error bounds for approximations constructed by an iterative decoupling of the Biot problem
(Journal article; Peer reviewed, 2021)The paper is concerned with guaranteed a posteriori error estimates for a class of evolutionary problems related to poroelastic media governed by the quasi-static linear Biot equations. The system is decoupled by employing ... -
GUBS: Graph-Based Unsupervised Brain Segmentation in MRI Images
(Journal article; Peer reviewed, 2022)Brain segmentation in magnetic resonance imaging (MRI) images is the process of isolating the brain from non-brain tissues to simplify the further analysis, such as detecting pathology or calculating volumes. This paper ... -
H-type foliations
(Journal article; Peer reviewed, 2022)With a view toward sub-Riemannian geometry, we introduce and study H-type foliations. These structures are natural generalizations of K-contact geometries which encompass as special cases K-contact manifolds, twistor spaces, ... -
Heat Transfer Upscaling in Geothermal Reservoirs
(Master thesis, 2015-11-20)In this thesis we implement a numerical model of heat transfer in geothermal reservoirs. We use existing pressure and flow transport solvers as a starting point to investigate discretization techniques for a convection-conduction ... -
Hedging av rentederivat
(Master thesis, 2006-11) -
The heritability curve and its applications to human non-Mendelian traits
(Doctoral thesis, 2023-12-08)Arvbarhet er et viktig mål for å beskrive en ikke-mendelsk egenskap; den måler i hvilken andel verdien av egenskapen påvirkes av genetisk materiale. I klassiske biometriske modeller er arvbarheten konstant over hele ... -
Hidden Markov and Hidden Semi-Markov models on Financial Timeseries
(Master thesis, 2020-09-11) -
Hidden semi-Markov-switching quantile regression for time series
(Journal article; Peer reviewed, 2021)A hidden semi-Markov-switching quantile regression model is introduced as an extension of the hidden Markov-switching one. The proposed model allows for arbitrary sojourn-time distributions in the states of the Markov-switching ... -
Hierarchical Bayesian Survival Analysis of Age-Specific Data From Birds' Nests
(Master thesis, 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 ... -
High order volume preserving integrators for three kinds of divergence-free vector fields via commutators
(Journal article, 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 ... -
High-accuracy phase-field models for brittle fracture based on a new family of degradation functions
(Peer reviewed; Journal article, 2018-02)Phase-field approaches to fracture based on energy minimization principles have been rapidly gaining popularity in recent years, and are particularly well-suited for simulating crack initiation and growth in complex fracture ... -
Higher Hochschild homology is not a stable invariant
(Master thesis, 2016-05-27)The purpose of this thesis is to study the higher Hochschild homology of some rational algebras. We know that for some algebras the higher Hochschild homology is a stable invariant. Studying the homology over the spheres ... -
Higher order space-time elements for a non-linear Biot model
(Journal article; Peer reviewed, 2019)In this work, we consider a non-linear extension of the linear, quasi-static Biot’s model. Precisely, we assume that the volumetric strain and the fluid compressibility are non-linear functions. We propose a fully discrete ... -
Higher-order Boussinesq systems: Modeling, numerics and applications
(Master thesis, 2019-06-22) -
The highly nonlinear shallow water equation: local well-posedness, wave breaking data and non-existence of sech2 solutions
(Journal article; Peer reviewed, 2024)In the context of the initial data and an amplitude parameter ε, we establish a local existence result for a highly nonlinear shallow water equation on the real line. This result holds in the space Hk as long as k > 5/2. ... -
HomologyBasis: Fast Computation of Persistent Homology
(Master thesis, 2021-06-01)Simplicial complexes are used in topological data analysis (TDA) to extract topological features of the data. The HomologyBasis algorithm is proposed as an efficient method for the computation of the topological features ...