Browsing Department of Mathematics and Natural Sciences by Title
Now showing items 239-258 of 312
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Screening for biosurfactant-producing bacteria for crude oil degradation, under cool and saline conditions
(Masteroppgave/UIS-TN-IMN/2016;, Master thesis, 2016-06)Using three sources with different hydrocarbon exposure histories—bacteria grown from Arctic seawater (Arctic), and bacteria from an offshore wastewater treatment system from both the bioreactor (BR) and settling chamber ... -
Search for new technologies that can give environmental benefits to the oil industry, subsea waterflooding
(Masteroppgave/UIS-TN-IMN/2013;, Master thesis, 2013)The goal of the oil producing companies are to extract hydrocarbon from the reservoir and make it available to customers. From an environmental perspective, it should be achieved with zero accidents, no harm to people, no ... -
Self-Absorption corrections in Fluorescence EXAFS
(Masteroppgave/UIS-TN-IMN/2016;, Master thesis, 2016-06-13)Variation of the absorption properties as a function of energy across, or near, an absorption edge is known as EXAFS (Extended X-ray Absorption Fine Structure). This technique implies scanning over an absorptionedge and ... -
Semi-algebraic optimization of temperature compensation in a general switch-type negative feedback model of circadian clocks
(Journal article; Peer reviewed, 2008)Temperature compensation is an essential property of circadian oscillators which enables them to act as physiological clocks. We have analyzed the temperature compensating behavior of a generalized transcriptional–translational ... -
Semisimple Lie Group theory with application in geometric invariant theory
(Masteroppgave/UIS-TN-IMN/2015;, Master thesis, 2015-06-01)The goal of this thesis was to learn about the theory of Lie algebras, Lie groups and some real geometric invariant theory, with emphasis on semisimple Lie group theory. The material in this thesis was not known to me ... -
Sensitivity analysis of a pathway with respect to fast and small temperature change
(Journal article; Peer reviewed, 2019)Temperature affects all enzymes simultaneously in a metabolic system. The enzyme concentration in a biochemical system can be considered as invariant under fast and small temperature change. Therefore, the total sensitivity ... -
Simulations of "tunnelling of the 3rd kind"
(Journal article; Peer reviewed, 2017-07)We consider the phenomenon of “tunnelling of the 3rd kind” [1], whereby a magnetic field may traverse a classically impenetrable barrier by pair creation of unimpeded quantum fermions. These propagate through the barrier ... -
Simulations of Cold Electroweak Baryogenesis: finding the optimal quench time
(Journal article; Peer reviewed, 2017-07)We revisit the numerical computation of the baryon asymmetry from Cold Electroweak Baryogenesis given the physical Higgs mass. We investigate the dependence of the asymmetry on the speed at which electroweak symmetry ... -
Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields
(Journal article; Peer reviewed, 2017-06)We perform numerical simulations of Cold Electroweak Baryogenesis, including for the first time in the Bosonic sector the full electroweak gauge group SU(2) × U(1) and CP-violation. We find that the maximum generated baryon ... -
Size estimation of nano-particles from synchrotron X-ray data
(Masteroppgave/UIS-TN-IMN/2016;, Master thesis, 2016-06-15)Three samples of Ag2SO4 powder were heated up from 380 °C to 540 °C and then cooled down to 380 °C using an in-house made heat blower with a thermo-couple based temperature controller. During the heating process, synchrotron ... -
Sludge production in chemical precipitation
(Masteroppgave/UIS-TN-IMN/2016;, Master thesis, 2016-06)Ferric chloride as in many other wastewater plants is used as a coagulant in wastewater treatment at Ivar (SNJ) since its multivalence nature has a significant effect on overcoming the stability of particles and consequently ... -
Smart water for eor by membranes
(Masteroppgave/UIS-TN-IMN/2014;, Master thesis, 2014-06-26)Design of smart water for carbonate reservoir, using membrane process is the focus of the thesis. The desirable characteristics of smart water is low salinity or low NaCl concentrations while retaining divalent ions such ... -
Some models for the magnetization of the drilling mud
(Masteroppgave/UIS-TN-IMN/2015;, Master thesis, 2015-06)The problem that a magnetic drilling mud cause to the accuracy of the directional drilling technology is outlined. The purpose of the work is identified in the theoretical modelling of the magnetic response of the magnetic ... -
Sorbose and the Hyphal branching rhythm in neurospora crassa : the influence of sorbose on growth, morphology, period and temperature compensation
(Masteroppgave/UIS-TN-IMN/2008, Master thesis, 2008)The glucose analogue sorbose has an interesting effect on the growth of the fungus Neurospora crassa. On sorbose Neurospora crassa wild type (wt) grows slower and with a marked difference in morphology. The appearance ... -
Sorption of nitrates to activated carbon
(Masteroppgave/UIS-TN-IMN/2012;, Master thesis, 2012)Stormwater is an increasing global threat to water quality in water bodies. Urbanization is expanding, and so is the amount of impermeable surfaces that prevents water seepage into the ground. This is disturbing the natural ... -
Stability of anisotropic perfect fluid spheres with electrical charge when the cosmological constant is included
(Masteroppgave/UIS-TN-IMN/2017;, Master thesis, 2017-06)The main task of this thesis is to investigate the stability of anisotropic perfect fluid spheres with electrical charge when the cosmological constant is included. However, before we get so far we needed to read articles ... -
Statistical analysis of locally parameterized shapes
(Peer reviewed; Journal article, 2022)In statistical shape analysis, the establishment of correspondence and defining shape representation are crucial steps for hypothesis testing to detect and explain local dissimilarities between two groups of objects. Most ... -
Stem cell regulation: Implications when differentiated cells regulate symmetric stem cell division
(Journal article; Peer reviewed, 2015-05)We use a mathematical model to show that if symmetric stem cell division is regulated by differentiated cells, then changes in the population dynamics of the differentiated cells can lead to changes in the population ... -
Stratigraphy and play models of Madagascar
(Masteroppgave/UIS-TN-IMN/2009;, Master thesis, 2011)Three western sedimentary basins (Morondava, Majunga and Ambilobe) constitute the main area of interest regarding the hydrocarbon potential of Madagascar. They result from the separation of the island from Africa. Nine ... -
Study of Environmental Regulations for Emissions to Air in the EU and the US, and to understand guidelines of regulations in the EU by considering a case of aluminum industry
(Masteroppgave/UIS-TN-IMN/2017;, Master thesis, 2017-06)Climate change and high level of atmospheric pollution is a global problem that has taken on particular significance in recent years and will continue to grow in the near future. To deal with this problem, it is very ...