Now showing items 21-40 of 767

• #### 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
• #### A simple method to detect spontaneous CP violation in multi-Higgs models ﻿

(Springer, 2017-08)
For models with several Higgs doublets we present an alternative method to the one proposed by Branco, Gerard and Grimus, in 1984, to check whether or not CP is spontaneously violated in the Higgs potential. The previous ...
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
• #### 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
• #### 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
• #### The seeding of ice algal blooms in Arctic pack ice: The multiyear ice seed repository hypothesis ﻿

(American Geophysical Union, 2017-07)
During the Norwegian young sea ICE expedition (N-ICE2015) from January to June 2015 the pack ice in the Arctic Ocean north of Svalbard was studied during four drifts between 83° and 80°N. This pack ice consisted of a mix ...
Journal article
• #### 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
• #### 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 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
• #### 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
• #### Experimental Determination of Hydrogen-Air Laminar Burning Velocities, and the Effect of Water Mist ﻿

(The University of Bergen, 2017-06-28)
This research project characterises an experimental set-up with the aim of finding laminar burning velocities of premixed hydrogen-air (dry) mixtures, at initial pressure and pressure of 294 K and 1 bar, using a 20 litre ...
Master thesis
• #### Construction of a plan library for high risk prostate cancer patients in proton therapy ﻿

(The University of Bergen, 2017-06-27)
High-risk prostate cancer patients can receive treatment of both the pelvic lymph nodes and seminal vesicles, in addition to the prostate based on an estimated risk of lymph node spread. Due to the large volume being ...
Master thesis
• #### A study of temperature profiles in ceiling jets under horizontal unconfined ceilings with the CFD tools FLACS and FDS ﻿

(The University of Bergen, 2017-06-22)
The key to controlling accidental fires, is early detection by the correct placement of devices such as smoke detectors and sprinkler systems. Smoke is accompanied by a temperature rise, brought about by the ceiling jet ...
Master thesis
• #### Onset of Spontaneous Imbibition ﻿

(The University of Bergen, 2017-06-22)
The spontaneous imbibition process in porous media is an important recovery mechanism and is governed by capillary forces that arise when two immiscible fluids are present in the pore space. This thesis presents new ...
Master thesis
• #### Influence of Residual Oil on Polymer Injectivity ﻿

(The University of Bergen, 2017-06-22)
Because a significant fraction of the world’s light oil reservoirs has already been produced, the technical and economic challenges of developing heavy oil fields is now unavoidable [1]. Water flooding has proven to be a ...
Master thesis
• #### Estimation of In-situ Polymer Rheology by Simulation of Radial Flow Experiment ﻿

(The University of Bergen, 2017-06-22)
Most experiments about in-situ rheology of polymer flow in porous media presented in literature is executed on linear cores and hence, performed during steady state conditions where the pressure drop is constant over the ...
Master thesis
• #### Pore-Level Interpretation of Methane Hydrate Growth and Dissociation with Deionized and Saline Water ﻿

(The University of Bergen, 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 ...
Master thesis
• #### Construction and evaluation of a temperature dependent laminar burning velocity model for inerted hydrogen, methane and carbon monoxide mixtures ﻿

(The University of Bergen, 2017-06-22)
The laminar burning velocity is an important mixture property providing information about different gas mixtures’ reactivity. It is extensively used in the computational fluid dynamics (CFD) program FLACS to calculate ...
Master thesis
• #### A Numerical and Experimental Study of the Dispersion of a Dust Layer by a Rarefaction Wave ﻿

(The University of Bergen, 2017-06-22)
In recent years, dynamics of dust lifting behind a passing shock wave have been studied extensively. Few studies have focused on the problem of dust lifting by a rarefaction wave. The aim of this study was to create a ...
Master thesis