Now showing items 1-20 of 727

• #### 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
• #### Simulation Study of Polymer Injectivity and Rheology in Radial Models ﻿

(The University of Bergen, 2017-08-02)
The simulation study conducted in this thesis was carried out at the Centre for Integrated Petroleum Research (Uni CIPR) at the University of Bergen (UiB). The main objective in this thesis was to study polymer rheology ...
Master thesis
• #### Measurement of the production of high-$p_{\rm T}$ electrons from heavy-flavour hadron decays in Pb–Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV ﻿

(Elsevier, 2017-08)
Electrons from heavy-flavour hadron decays (charm and beauty) were measured with the ALICE detector in Pb–Pb collisions at a centre-of-mass of energy $\sqrt{s_{\rm NN}}=2.76$ TeV. The transverse momentum ($p_{\rm T}$) ...
Journal article
• #### Alternative gauge for the description of the light-matter interaction in a relativistic framework ﻿

(American Physical Society, 2017-08)
We present a generalized velocity gauge form of the relativistic laser-matter interaction. In comparison with the (equivalent) regular minimal coupling description, this form of light-matter interaction results in superior ...
Journal article
• #### Asymmetric Ionospheric Equivalent Currents at Magnetic Conjugate Points ﻿

(The University of Bergen, 2017-07-01)
In this thesis we will study high-latitude ionospheric equivalent currents at magnetic conjugate points. The following questions have been addressed in this thesis: What solar zenith angle defines the dark-sunlit terminator? ...
Master thesis
• #### Measurement of electrons from beauty-hadron decays in p-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV and Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV ﻿

(Springer, 2017-07)
The production of beauty hadrons was measured via semi-leptonic decays at mid-rapidity with the ALICE detector at the LHC in the transverse momentum interval $1<p_{\rm T}<8$ GeV/$c$ in minimum-bias p–Pb collisions at ...
Journal article
• #### Design of a high power OOK modulator and verification of circuits in 60GHz SiGe BiCMOS ﻿

(The University of Bergen, 2017-06-29)
In this thesis, components for the UiB 60 GHz system are verified numerically and an on-off-keying (OOK) modulator is designed. Presence of mass in particle detector systems decrease the accuracy measuring the particle paths. ...
Master thesis
• #### Study of meso-scale reversed flow events in the polar ionosphere by SuperDARN radars ﻿

(The University of Bergen, 2017-06-29)
In this study we have investigated Reversed Flow Events (RFEs) in the northern hemisphere polar cap. A RFE is an ∼50-250 km wide flow channel that opposes the large scale background flow. A total of 57 new RFEs were ...
Master thesis
• #### Design of a 60 GHz VCO Hybrid Microstrip Resonator in a 0.13-µm Sige process ﻿

(The University of Bergen, 2017-06-29)
Augmented reality, 4K television and video gaming. These are just some examples were the wireless products lacks performance in terms of multi-gigabit data transfers. A solution to this challenge is the 60 GHz band. The ...
Master thesis