• Graph Constructions for the Contact Process with a Prescribed Critical Rate 

      Bethuelsen, Stein Andreas; Valesin, Daniel; Baptista da Silva, Gabriel (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 

      Vikebø, Frode; Berntsen, Jarle; Furnes, Gunnar (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 

      Kumar, Kundan; Kyas, Svetlana; Nordbotten, Jan Martin; Repin, Sergey (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 

      Mayala, Simeon Sahani; Herdlevær, Ida Ajvazi; Haugsøen, Jonas Bull; Anandan, Shamundeeswari; Blaser, Nello; Gavasso, Sonia; Brun, Morten (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 

      Baudoin, Fabrice; Grong, Erlend; Rizzi, Luca; Vega-Molino, Gianmarco (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 

      Varzina, Anna (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 

      Reisæter, Lars Aga (Master thesis, 2006-11)
    • The heritability curve and its applications to human non-Mendelian traits 

      Azzolini, Francesca (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 

      Eilertsen, Emil Lund (Master thesis, 2020-09-11)
    • Hidden semi-Markov-switching quantile regression for time series 

      Maruotti, Antonello; Petrella, Lea; Sposito, Luca (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 

      Willgohs, Niejing (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 

      Xue, Huiyan (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 

      Sargado, Juan Michael; Keilegavlen, Eirik; Berre, Inga; Nordbotten, Jan Martin (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 

      Tenti, Andrea (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 

      Borregales Reveron, Manuel Antonio; Radu, Florin Adrian (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 

      Hatland, Sondre Dahle (Master thesis, 2019-06-22)
    • HomologyBasis: Fast Computation of Persistent Homology 

      Brosten, Peter Hannagan (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 ...
    • Horisontkunnskap i aksjon. Om lærernes syn på relevansen av avansert matematisk kunnskap i undervisningsarbeidet 

      Lauw, Sabine (Master thesis, 2018-06-20)
      In this master’s thesis I have examined in which ways Norwegian secondary teachers in mathematics think they need advanced mathematical knowledge in their teaching practice, and I have discussed this against the concept ...
    • A horizontal Chern–Gauss–Bonnet formula on totally geodesic foliations 

      Baudoin, Fabrice; Grong, Erlend; Vega-Molino, Gianmarco (Journal article; Peer reviewed, 2022)
      Under suitable conditions, we show that the Euler characteristic of a foliated Riemannian manifold can be computed only from curvature invariants which are transverse to the leaves. Our proof uses the hypoelliptic sub-Laplacian ...
    • Horizontal holonomy and foliated manifolds 

      Chitour, Yacine; Grong, Erlend; Jean, Frederic; Kokkonen, Petri (Journal article; Peer reviewed, 2019)
      We introduce horizontal holonomy groups, which are groups defined using parallel transport only along curves tangent to a given subbundle D of the tangent bundle. We provide explicit means of computing these holonomy groups ...