Department of Mathematics
Recent Submissions
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A hybrid upwind scheme for two-phase flow in fractured porous media
(Journal article; Peer reviewed, 2024)Simulating the flow of two fluid phases in porous media is a challenging task, especially when fractures are included in the simulation. Fractures may have highly heterogeneous properties compared to the surrounding rock ... -
Acoustic tags versus camera—a case study on feeding behaviour of European seabass in sea cages
(Journal article; Peer reviewed, 2025)Intoduction: With the expansion of the aquaculture industry, the need arises for scalable, reliable, and robust methods to assess fish behaviour in sea cages to guide operational management, which includes feeding optimisation ... -
A hypercubic Mk model framework for capturing reversibility in disease, cancer, and evolutionary accumulation modelling
(Journal article; Peer reviewed, 2025)Motivation Accumulation models, where a system progressively acquires binary features over time, are common in the study of cancer progression, evolutionary biology, and other fields. Many approaches have been developed ... -
Ecological Predictors of Organelle Genome Evolution: Phylogenetic Correlations with Taxonomically Broad, Sparse, Unsystematized Data
(Journal article; Peer reviewed, 2024)Comparative analysis of variables across phylogenetically linked observations can reveal mechanisms and insights in evolutionary biology. As the taxonomic breadth of the sample of interest increases, challenges of data ... -
Models of Hydration Dependent Lymphatic Opening, Interstitial Fluid Flows and Ambipolar Diffusion
(Journal article; Peer reviewed, 2024)Objective A theoretical understanding of fluid exchange and the role of initial lymph formation in tissues through mathematical/physical modeling is lacking. Methods Here, we present three models for tissues rich ... -
A model for saturated–unsaturated flow with fractures acting as capillary barriers
(Journal article; Peer reviewed, 2024)High-resolution modeling of the flow dynamics in fractured soils is highly complex and computationally demanding as it requires precise geometrical description of the fractures in addition to resolving a multiphase free-flow ... -
Entropy stable far-field boundary conditions for the compressible Navier-Stokes equations
(Journal article; Peer reviewed, 2024)We consider external compressible-flow problems with open boundaries. We begin by presenting the basic idea, namely the introduction of an infinite buffer zone around the computational domain, for the advection-diffusion ... -
Partitions of Vertices and Facets in Trees and Stacked Simplicial Complexes
(Journal article; Peer reviewed, 2024)For stacked simplicial complexes, (special subclasses of such are: trees, triangulations of polygons, stacked polytopes with their triangulations), we give an explicit bijection between partitions of facets (for trees: ... -
Automated linear solver selection for simulation of multiphysics processes in porous media
(Journal article; Peer reviewed, 2024)Porous media processes involve various physical phenomena such as mechanical deformation, transport, and fluid flow. Accurate simulations must capture the strong couplings between these phenomena. Choosing an efficient ... -
Nucleoside supplements as treatments for mitochondrial DNA depletion syndrome
(Journal article; Peer reviewed, 2024)Introduction: In mitochondrial DNA (mtDNA) depletion syndrome (MDS), patients cannot maintain sufficient mtDNA for their energy needs. MDS presentations range from infantile encephalopathy with hepatopathy (Alpers syndrome) ... -
Most Probable Flows for Kunita SDEs
(Journal article; Peer reviewed, 2024)We identify most probable flows for Kunita Brownian motions, i.e. stochastic flows with Eulerian noise and deterministic drifts. Such stochastic processes appear for example in fluid dynamics and shape analysis modelling ... -
Impact of MRI radiomic feature normalization for prognostic modelling in uterine endometrial and cervical cancers
(Journal article; Peer reviewed, 2024)Widespread clinical use of MRI radiomic tumor profiling for prognostication and treatment planning in cancers faces major obstacles due to limitations in standardization of radiomic features. The purpose of the current ... -
Mixed-Dimensional Approach for Compositional Multiphase Flow in High-Enthalpy Fractured Geothermal Reservoirs
(Stanford Geothermal Workshop;, Chapter, 2025)We present a novel multiphase compositional model for geothermal reservoir simulation that incorporates phase separation phenomena and explicitly represents fractures. Mass and heat transfer in porous media typically use ... -
Overweight and obesity as risk factors for chronic low back pain: a new follow-up in the HUNT Study
(Journal article; Peer reviewed, 2024)Background Numerous studies have examined associations between overweight and obesity and risk of low back pain (LBP), but the exact magnitude of these associations is not yet clear. The purpose of this work was to ... -
SS3DNet-AF: A Single-Stage, Single-View 3D Reconstruction Network with Attention-Based Fusion
(Journal article; Peer reviewed, 2024)Learning object shapes from a single image is challenging due to variations in scene content, geometric structures, and environmental factors, which create significant disparities between 2D image features and their ... -
On the stability radius for linear time-delay systems
(Journal article; Peer reviewed, 2024)The exponential function that appears in the formula of the stability radius of linear time-delay differential systems is approximated by its Padé approximant. This reduces the computation of the level sets of singular ... -
On the complex stability radius for time-delay differential-algebraic systems
(Journal article; Peer reviewed, 2025)An algorithm is proposed for computing the complex stability radius of a linear differential-algebraic system with a single delay and including a neutral term. The exponential factor in the characteristic equation is ... -
Modelling and simulation of single-phase flow and non-isothermal reactive transport in fractured porous media
(Doctoral thesis, 2025-03-31)Mange problemer i oppsprukne porøse medier skjer som et resultat av kjemiske reaksjoner med en kombinasjon av væskestrøming, varmetransport og transport av kjemiske arter. Slike problemer representerer en tett kobling av ... -
A discrete fracture matrix framework for simulating single-phase flow and non-isothermal reactive transport
(Journal article; Peer reviewed, 2024)Simulating reactive transport in fractured porous media is computationally demanding since it requires solving physical and chemical processes that non-linearly affect each other. At the same time, the processes strongly ... -
A Unified Compositional Flow Model for Simulating Multiphase High-Enthalpy Geothermal Reservoirs
(Stanford Geothermal Workshop;, Chapter, 2025)Simulating high-enthalpy geothermal reservoirs poses significant challenges due to the complex interactions between multicomponent, multiphase geothermal fluids influenced by varying pressure, temperature, and other physical ...
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