Blar i Faculty of Mathematics and Natural Sciences på tittel
Viser treff 7269-7288 av 10325
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Population genetic structure of the glacier lanternfish, Benthosema glaciale (Myctophidae) in Norwegian waters
(Peer reviewed; Journal article, 2001)It is hypothesised that the fjords with restricted water circulation may partially isolate fish populations living there. The pelagic life history stages of the mesopelagic lanternfish may potentially subject to dispersal ... -
Population Genetic Structure of the Spotted Wolffish, Anarhichas minor, in the North Atlantic
(Peer reviewed; Journal article, 2008) -
Population genetics of Saccharina latissima (sugar kelp) in Norway
(Master thesis, 2019-05-01)The interest in cultivating sugar kelp, Saccharina latissima in Norway is increasing and therefore knowledge about the population genetics of this species is important. A total of 345 samples were genotyped from sixteen ... -
Population processes in cyber system variability
(Journal article; Peer reviewed, 2022)Variability is inherent to cyber systems. Here, we introduce ideas from stochastic population biology to describe the properties of two broad kinds of cyber systems. First, we assume that each of N0 components can be in ... -
Population structure and dynamics of Atlantic herring. A case study of herring inhabiting marginal habitats in Landvikvannet and its vicinity
(Doctoral thesis, 2018-05-04)Knowledge about the structure and dynamics of marine fish populations is essential for their conservation and management to maintain biodiversity and population complexity. Atlantic herring (Clupea harengus) is one of the ... -
Population structure of European sprat (Sprattus sprattus) in the Greater North Sea ecoregion revealed by otolith shape analysis
(Journal article; Peer reviewed, 2022)A successful discrimination of fish populations is essential for sustainable management and assessment. Otolith shape analysis has been used on several species to reveal their population structure. Our aim was to use the ... -
The population structure of roundnose grenadier (Coryphaenoides rupestris) in southwestern Norway
(Master thesis, 2017-05-30)Ocean circulation, bathymetric barriers, and ecological processes can hinder the dispersal of marine fishes and thus generate sub-populations. The present study investigated the population structure of a benthopelagic fish, ... -
Population-balance modeling of CO2 foam for CCUS using nanoparticles
(Journal article; Peer reviewed, 2020)Foam implementation for carbon capture, utilization and storage (CCUS) can greatly improve CO2 mobility control, resulting in enhanced hydrocarbon production and carbon storage capacity. The use of nanoparticles (NP) to ... -
A pore network model for calculation of interfacial velocities
(Peer reviewed; Journal article, 2003)Two-phase flow in porous media is characterized by fluid-fluid interfaces that separate the fluid phases at the pore scale. These interfaces support pressure differences between phases, and their dynamics allow for saturation ... -
Pore- and Core-Scale Insights of Nanoparticle-Stabilized Foam for CO2-Enhanced Oil Recovery
(Journal article; Peer reviewed, 2020)Nanoparticles have gained attention for increasing the stability of surfactant-based foams during CO2 foam-enhanced oil recovery (EOR) and CO2 storage. However, the behavior and displacement mechanisms of hybrid ... -
Pore-level Dense Phase CO2 Foam Dynamics during CO2 EOR and CO2 Storage
(Doctoral thesis, 2024-09-26)Rask befolkningsvekst, økende velstand og økonomisk ekspansjon bidro til at behovet for energi økte med 1.3% i 2022. Det økende energibehovet kan sees på som en trussel ettersom energiproduksjon representerer tre fjerdedeler ... -
Pore-level foam generation and flow for mobility control in fractured systems
(Journal article, 2015-03-05)Pore-level foam generation, propagation, and sweep efficiency were visualized using silicon-wafer micromodels with an accurate representation of sandstone pore structure, grain shapes and sizes based on thin-section analysis. ... -
Pore-Level Interpretation of Methane Hydrate Growth and Dissociation with Deionized and Saline Water
(Master thesis, 2017-06-22)Natural gas hydrates are solid crystalline compounds composed of water and gas molecules, located in vast amounts around the world, in subsurface permafrost and oceanic environments. With an increasing demand of energy ... -
Pore-level Ostwald ripening of CO2 foams at reservoir pressure
(Journal article; Peer reviewed, 2023)The success of foam to reduce CO2 mobility in CO2 enhanced oil recovery and CO2 storage operations depends on foam stability in the reservoir. Foams are thermodynamically unstable, and factors such as surfactant adsorption, ... -
A Pore-Level Study of Dense-Phase CO2 Foam Stability in the Presence of Oil
(Journal article; Peer reviewed, 2024)The ability of foam to reduce CO2 mobility in CO2 sequestration and CO2 enhanced oil recovery processes relies on maintaining foam stability in the reservoir. Foams can destabilize in the presence of oil due to mechanisms ... -
Pore-scale bubble population dynamics of CO2-foam at reservoir pressure
(Journal article; Peer reviewed, 2022)The flow of CO2 foam for mobility control in porous media is dictated by the foam texture, or bubble density, which is commonly expressed as the number of bubbles per unit of flowing gas. In most high-pressure laboratory ... -
Pore-scale dynamics for underground porous media hydrogen storage
(Journal article; Peer reviewed, 2022)Underground hydrogen storage (UHS) has been launched as a catalyst to the low-carbon energy transitions. The limited understanding of the subsurface processes is a major obstacle for rapid and widespread UHS implementation. ... -
Pore-scale investigation of methane hydrate phase transitions and growth rates in synthetic porous media
(Master thesis, 2018-06-20)A growing demand for energy and natural gas in particular, makes methane gas hydrates a potential target to supplement natural gas production from conventional resources. Several pilot projects have proven the feasibility ... -
Pore-scale kinetics of calcium dissolution and secondary precipitation during geological carbon storage
(Journal article; Peer reviewed, 2023)Geological carbon storage (GCS) in deep underground formations presents a significant opportunity to mitigate anthropogenic emissions of carbon dioxide in the context of climate change. The injected carbon dioxide may ... -
A pore-scale model for permeable biofilm: Numerical simulations and laboratory experiments
(Peer reviewed; Journal article, 2019)In this paper, we derive a pore-scale model for permeable biofilm formation in a two-dimensional pore. The pore is divided into two phases: water and biofilm. The biofilm is assumed to consist of four components: water, ...