Browsing Faculty of Science and Technology by Title
Now showing items 10374-10393 of 10495
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Well-posedness and discretization for a class of models for mixed-dimensional problems with high-dimensional gap
(Journal article; Peer reviewed, 2021)In this work, we show the underlying mathematical structure of mixed-dimensional models arising from the composition of graphs and continuous domains. Such models are becoming popular in applications, in particular, to ... -
Well-Posedness for a Dispersive System of the Whitham-Boussinesq Type
(Journal article; Peer reviewed, 2020)We regard the Cauchy problem for a particular Whitham--Boussinesq system modeling surface waves of an inviscid incompressible fluid layer. We are interested in well-posedness at a very low level of regularity. We derive ... -
Well-Posedness for a Whitham–Boussinesq System with Surface Tension
(Journal article; Peer reviewed, 2020)We regard the Cauchy problem for a particular Whitham–Boussinesq system modelling surface waves of an inviscid incompressible fluid layer. The system can be seen as a weak nonlocal dispersive perturbation of the shallow ... -
Well-Posedness for the Extended Schrödinger–Benjamin–Ono System
(Journal article; Peer reviewed, 2024) -
Well-posedness Issues for Nonlinear Partial Differential Equations Appearing in the Modeling of Long Water Waves
(Doctoral thesis, 2018-12-18)Modelling of wave motion in a fluid is usually based on classical systems which are obtained by the hypotheses that the flow is irrotational and the bottom is even. In such a context, the influence of vorticity is entirely ... -
Well-posedness of the fully coupled quasi-static thermo-poroelastic equations with nonlinear convective transport
(Peer reviewed; Journal article, 2019-03)This paper is concerned with the analysis of the quasi-static thermo-poroelastic model. This model is nonlinear and includes thermal effects compared to the classical quasi-static poroelastic model (also known as Biot's ... -
The West African salt-bearing rifted margin—Regional structural variability and salt tectonics between Gabon and Namibe
(Journal article; Peer reviewed, 2023)Salt-bearing rifted margins comprise some of the most structurally complex and economically important sedimentary basin settings such as the South Atlantic and the Gulf of Mexico salt basins. They are also involved with ... -
West Spitsbergen fold and thrust belt: A digital educational data package for teaching structural geology
(Journal article; Peer reviewed, 2023)The discipline of structural geology is taking an advantage of compiling observations from multiple field sites to comprehend the bigger picture and constrain the region's geological evolution. In this study we demonstrate ... -
Wettability effects on oil recovery mechanisms in fractured chalk
(Doctoral thesis, 2007-02-02)This thesis is a part of the ongoing project, “Oil recovery from fractured chalk reservoirs”, which is a collaboration between the Reservoir Physics Group at the University of Bergen and ConocoPhillips Research Center in ... -
Wetting in Porous Media: A Nuclear Magnetic Resonance Study.
(Doctoral thesis, 2020-06-30)The purpose of this thesis has been to study mechanisms responsible for wettability alteration on reservoir minerals and then to study how surface wettability affects the distribution of immiscible liquids in porous media. ... -
Wetting of porous thin films exhibiting large contact angles
(Journal article; Peer reviewed, 2023)Porous solid films that promote large apparent contact angles are interesting systems since their wetting properties are dependent on both the surface structure and water penetration into the film. In this study, a ... -
Wetting Stability of Aged Limestone in the presence of HPAM polymer
(Master thesis, 2020-06-04)The Norwegian Petroleum Directorate required that a polymer field pilot should be performed in the Johan Sverdrup field in the second phase of the field development to confirm potential enhanced recovery potential at the ... -
What can selection experiments teach us about fisheries-induced evolution?
(Peer reviewed; Journal article, 2014-03)There is evidence that fisheries are altering the phenotypic composition of fish populations, often in ways that may reduce the value of fish stocks for the exploiters. Despite the increasing number of theoretical and field ... -
What Determines the Parameters of a Propagating Streamer: A Comparison of Outputs of the Streamer Parameter Model and of Hydrodynamic Simulations
(Journal article; Peer reviewed, 2021)Electric streamer discharges (streamers) in the air are a very important stage of lightning, taking place before formation of the leader discharge, and with which an electric discharge starts from conducting objects which ... -
What Is Gill Health and What Is Its Role in Marine Finfish Aquaculture in the Face of a Changing Climate?
(Journal article; Peer reviewed, 2020)It is hard to find a definition of gill health in the literature although there is a lot of information on changes to gill structure as a result of infectious and non-infectious challenge. How these changes relate to overall ... -
What Is Known About Vertex Cover Kernelization?
(Peer reviewed; Journal article, 2018)We are pleased to dedicate this survey on kernelization of the Vertex Cover problem, to Professor Juraj Hromkovič on the occasion of his 60th birthday. The Vertex Cover problem is often referred to as the Drosophila of ... -
What is natural? The importance of a long-term perspective in biodiversity conservation and management
(Peer reviewed; Journal article, 2006)Ecosystems change in response to factors such as climate variability, invasions, and wildfires. Most records used to assess such change are based on short-term ecological data or satellite imagery spanning only a few ... -
What is quantitative plant biology?
(Journal article; Peer reviewed, 2021)Quantitative plant biology is an interdisciplinary field that builds on a long history of biomathematics and biophysics. Today, thanks to high spatiotemporal resolution tools and computational modelling, it sets a new ... -
What is the appropriate coordinate system for magnetometer data when analyzing ionospheric currents?
(Peer reviewed; Journal article, 2014-10)In this paper we investigate which coordinate representation is most appropriate when analyzing ground magnetometer data in terms of ionospheric currents, in particular the westward electrojet. The AL and the recently ... -
What is the flux of low energy electron precipitation in the lower thermosphere?
(Master thesis, 2022-06-03)The ionisation caused by Energetic particle precipitation (EPP) into the atmosphere, lead to chemical reactions producing NO_x (N, NO, NO_2) gases. Auroral electrons (1-30 keV) deposit their energy throughout the upper ...