Browsing Fakultet for naturvitenskap (NV) by Title
Now showing items 35-54 of 12449
-
A 2D sediment bed morphodynamics model for turbulent, non-Newtonian, particle-loaded flows
(Chapter, 2017)In petroleum drilling, cuttings transport problems, i.e. an accumulation of drilled of solids in the wellbore, are a major contributor to well downtime and have therefore been extensively researched over the years, both ... -
A battle of the mountains: Intraguild competition between arctic fox Vulpes lagopus and red fox Vulpes vulpes
(Master thesis, 2019)Fjellreven (Vulpes lagopus) er en truet art i Fennoskandia. Konkurranse med rødreven (Vulpes vulpes) er regnet som en av hovedtruslene for fjellrevens utbredelse. Flere bevaringstiltak har blitt satt i gang for å redde ... -
A Benders Decomposition Method for a Multi-stage Stochastic Energy Market Equilibrium Problem
(Master thesis, 2014)In this thesis, a stochastic energy market equilibrium model is developed and implemented in GAMS. The model involves multi objective optimization and is solved as a mixed complementarity problem. To provide an efficient ... -
A biophysical study of oscillatory water regulation in plants : measurements and models
(Doctoral thesis, 2001)In this thesis, several aspects of the water regulation of plants will be studied and discussed. The focus is on biophysical properties of the system, especially on the dynamics and qualitative mechanistics. Following this ... -
A Bivariate Analysis of the Homogeneous Plane-Wave Assumption in Magnetotelluric Theory
(Master thesis, 2015)The magnetotelluric method is an electromagnetic induction method used to image subsurface resistivity. It utilizes Earths' natural time-varying electromagnetic field as a source. The fields propagating into the subsurface ... -
A Bosonic Coherent State Path Integral Representation for Spin Systems based on a Projection Operator Implementation of the Schwinger boson number constraint
(Master thesis, 2018)The path integral single spin partition function in the basis of boson coherent states, for a general normal ordered two-mode Schwinger boson Hamiltonian, has been computed. Within the initial phase of the calculational ... -
A bridge between statistical learning and agent based modelling in stock market predictions
(Master thesis, 2016)The research related to agent based modelling and statistical learning has increased in the recent years, as alternatives to main stream econometrics. This project combines the three for constructing and evaluating a ... -
A Brief Review of Nanocellulose Based Hybrid Membranes for CO2 Separation
(Journal article; Peer reviewed, 2019)Due to the high specific surface area, high mechanical strength and broad possibility of surface modification, nanocellulose has obtained much attention as a new class of bio-based nanomaterials with promising potential ... -
A burning question: what are the risks and benefits of mammalian torpor during and after fires?
(Journal article; Peer reviewed, 2018)Although wildfires are increasing globally, available information on how mammals respond behaviourally and physiologically to fires is scant. Despite a large number of ecological studies, often examining animal diversity ... -
A C4-oxidizing lytic polysaccharide monooxygenase cleaving both cellulose and cello-oligosaccharides
(Journal article; Peer reviewed, 2014)Lignocellulosic biomass is a renewable resource that significantly can substitute fossil resources for the production of fuels, chemicals, and materials. Efficient saccharification of this biomass to fermentable sugars ... -
A Chemometric Study of Ethylene Oxychlorination
(Master thesis, 2020)Ethylene oxychlorination process using a CuCl2 catalyst is widely used to manufacture Poly Vinyl Chloride (PVC). The high exothermicity of this process makes temperature control difficult. The failure of proper temperature ... -
A colorimetric assay to rapidly determine the activities of lytic polysaccharide monooxygenases
(Journal article; Peer reviewed, 2018)Background Lytic polysaccharide monooxygenase (LPMOs) are enzymes that catalyze the breakdown of polysaccharides in biomass and have excellent potential for biorefinery applications. However, their activities are relatively ... -
A combined isotropic, kinematic and distortional hardening model for aluminum and steels under complex strain-path changes
(Journal article; Peer reviewed, 2018)In this work, a new model is proposed for predicting stress transients caused by strain path changes. The model is formulated in stress space, where a second order tensor, i.e., the microstructure stress deviator, is used ... -
A Combined Thermal Cycle Software for Welded and Locally Heat Treated 6082 Aluminium Alloys
(Master thesis, 2020)Denne oppgaven dekker utviklingen av et kombinert termisk syklus-program for sveising og induksjon, Combined Weld and Induction Thermal Cycle software, som brukes til å estimere de termiske syklusene under sveising og lokal ... -
A Combined Upcycling Route for Silicon Powder Waste and a Silicon Alloy
(Master thesis, 2023)Silisium er et avgjørende element i produkter som omgir oss hver dag, som solcellepaneler, elektronikk og i kjemiske produkter. Behovet for en bærekraftig og sirkulær verdikjede for silisium er presserende. Dagens produksjon ... -
A comparative analysis of dual drilling methods as an aim to reduce the costs of drilling
(Bachelor thesis, 2021)De ulike konseptene for dual drilling er dual activity drilling, full dual drilling, top hole dual drilling, og dual riserless drilling er blitt gjennomgått basert på data og informasjon samlet sammen fra ulike aktører fra ... -
A comparative analysis of the properties of regulated promoter systems commonly used for recombinant gene expression in Escherichia coli
(Journal article; Peer reviewed, 2013)Abstract Background Production of recombinant proteins in bacteria for academic and commercial purposes is a well established field; however the outcomes of process developments for specific proteins are still often ... -
A Comparative Study of Different CFD-codes for Fluidized Beds
(Master thesis, 2023)Fluidiserte senger er viktige prosesser med mange bruksområder i ulike industrier. Ett av bruksområdene er som en tørrskrubber for å behandle avgass fra aluminiumsproduksjon. Økt etterspørsel etter aluminium i verden betyr ... -
A comparative study of diploid versus triploid Atlantic salmon (Salmo salar L.). The effects of rearing temperatures (5, 10 and 15 °C) on raw material characteristics and storage quality
(Journal article; Peer reviewed, 2017)Several major market operators argue that the current level of knowledge about quality is too scant to justify a switch to a large-scale production of triploid salmon. The aim of the present study was, therefore, to elucidate ... -
A comparative study of gene correlation patterns and mean expression levels in Alzheimer's disease by network analysis
(Master thesis, 2020)Hvert tredje sekund blir én person i verden rammet av demens. Hjernecellene deres dør, hukommelsen går gradvis tapt og kjente steder blir ukjente. Det er ikke bare ødeleggende for individet selv, men påvirker også familien ...