Now showing items 1-20 of 770

• #### Investigation of Low Salinity Polymer and Surfactant Flooding in Carbonate Reservoir at Reservoir Conditions ﻿

(The University of Bergen, 2018-04-20)
It is estimated that 40-60% of the world’s total hydrocarbon production is from carbonate rocks [1]. Carbonate rocks contain the world`s largest fields in the Middle East (i.e., Ghawar Field, Saudi Arabia). Waterflooding ...
Master thesis
• #### Teknologi for MRI av hjernens funksjon og biokjemiske sammensetning ﻿

(The University of Bergen, 2018-04-07)
This thesis is divided into two parts. The first part addresses synchronisation between the rate of frequency the MR system used for fMRI examinations at Haukeland universitetssjukehus operates on (10 Mhz) and the sampling ...
Master thesis
• #### How Often Do Thermally Excited 630.0 nm Emissions Occur in the Polar Ionosphere? ﻿

(American Geophysical Union, 2018-01)
This paper studies thermally excited emissions in the polar ionosphere derived from European Incoherent Scatter Svalbard radar measurements from the years 2000–2015. The peak occurrence is found around magnetic noon, where ...
Journal article
• #### Magnetic Resonance Imaging of Hydrate Phase Transitions in Sediments ﻿

(The University of Bergen, 2017-12-21)
Natural gas hydrates, simplified described as gas compressed in ice, are a substance existing in large quantities around the world. Their existence requires elevated pressures and low temperature. They are therefore found ...
Master thesis
• #### Anisotropic reflectance of Arctic snow and sea ice ﻿

(The University of Bergen, 2017-12-21)
We present an investigation of the angular distribution of reflected light on snow and sea ice, for three selected wavelengths; 500, 800 and 1100 nm. Our analysis covers how the angular reflectance distribution is affected ...
Master thesis
• #### Mass Ordering of Third Generation Sleptons in a Trilinear-Augmented Gaugino Mediated Supersymmetry-Breaking Scenario ﻿

(The University of Bergen, 2017-12-21)
In this thesis, we are exploring the particle spectrum of trilinear-augmented gaugino mediation. In particular, we calculate the masses of the stau and the tau sneutrino in a section of the parameter space in which one is ...
Master thesis
• #### Rotation and Polarization in Heavy Ion Collisions ﻿

(The University of Bergen, 2017-12-19)
Doctoral thesis
• #### Application of MRI in studies of tetrahydrofuran hydrates in quartz sand at atmospheric pressure ﻿

(The University of Bergen, 2017-12-06)
Natural gas hydrates form under low temperatures and high pressures. They can be found in abundance in permafrost environments and under the sea floor, where the temperature and pressure conditions ensure their stability. ...
Master thesis
• #### New Concept for Evaluating the Risk of Hydrate Formation during Processing and Transport of Hydrocarbons ﻿

(The University of Bergen, 2017-10-31)
Transport of hydrocarbons from reservoir to gas processing plants and for supply to delivery terminals is predominantly done using pipelines, particularly within reasonable distance. In the North Sea of Norway, there are ...
Master thesis
• #### Altering the wetting properties of FEP films by nano-structuring the surface using reactive ion etching ﻿

(The University of Bergen, 2017-10-18)
Renewable energy sources has become a large field of research, and in the recent years, methods to harvest energy from rain drops have been developed. This technology is based on rain drops rolling or sliding on a polymer ...
Master thesis
• #### Proton computed tomography readout testing and detector design ﻿

(The University of Bergen, 2017-10-11)
Proton computed tomography is a way of using protons instead of x-rays to make a three dimensional image of a scanned object. This will result in more accurate predictions for proton treatments and less radiation in the ...
Master thesis
• #### Scale size-dependent characteristics of the magnetosphere-ionosphere system using auroral imaging ﻿

(The University of Bergen, 2017-10-06)
The spectacular and breathtaking aurora dancing around on the night sky visualizes the fundamental behavior of complex processes in the near Earth space. The plethora of papers published over the last five decades have ...
Doctoral thesis
• #### Ultrasonic measurement systems with diffraction correction for gas ﻿

(The University of Bergen, 2017-09-30)
Master thesis
• #### Evaluation of Methane and Water Structure at a Hematite Surface - A Hydrate Prevention Perspective ﻿

(The University of Bergen, 2017-09-25)
In Norway oil and gas is found in reservoirs below the North Sea and the Barents Sea. When this is transported through pipelines it is exposed to temperatures and pressures in the hydrate stability zone. If sufficient ...
Master thesis
• #### Temperatur og salinitets påvirkning på viskositeten til delvis hydrolyserte polymer med og uten hydrofobe substituenter ﻿

(The University of Bergen, 2017-09-15)
I denne oppgaven sammenlignes viskositetsutviklingen som funksjon av temperatur for to hydrofobisk modifiserte polyelektrolytter og en polyelektrolytt uten hydrofobe substituenter. Målingene er utført ved to ulike ...
Master thesis
• #### Study on viability of Gain Stabilization of SiPMs and determination of b-quark fragmentation fraction ratio f_c/f_u in pp collisions at √s = 13 TeV with the ATLAS detector ﻿

(The University of Bergen, 2017-09-05)
Gain Stabilization of SiPMs through the usage of an external board to regulate bias voltage based on temperature yields a variation in gain of less than 0.5 % using a system of four SiPMs with temperature readout in close ...
Master thesis
• #### Centrality dependence of the pseudorapidity density distribution for charged particles in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV ﻿

(Elsevier, 2017-09)
We present the charged-particle pseudorapidity density in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02\,\mathrm{Te\kern-.25exV}$ in centrality classes measured by ALICE. The measurement covers a wide pseudorapidity ...
Journal article
• #### Numerical Investigation of Particle Dispersion in a Gravitational Field and in Zero Gravity. ﻿

(The University of Bergen, 2017-08-31)
Combustible solid particles dispersed in gas has previously been discovered to be a precursor to a potential dust explosion. Consequently, a growing interest on the subject has been observed in recent years. Numerous ...
Master thesis
• #### Upscaling on Fracture Flow Models ﻿

(The University of Bergen, 2017-08-25)
Fractures have a great impact on the quality of a porous media. The understanding of the fractures is important to describe the challenges linked to flow of geothermal heat, the transport of groundwater or transport of ...
Master thesis
• #### Acoustic Signatures of Gas Hydrates - Observations and Modelling ﻿

(The University of Bergen, 2017-08-08)
Interpretation of a Bottom Simulating Reflector (BSR) associated with gas hydrate accumulations in seismic, depend on gas hydrate saturation and distribution in pore voids. The BSR cannot predict gas hydrate saturation ...
Master thesis