Now showing items 1284-1303 of 1815

• #### Quantification of CH4 Hydrate Film Growth Rates in Micromodel Pores ﻿

(Journal article; Peer reviewed, 2021)
In this paper, we report the growth pattern and the rate of CH4 hydrate in sandstone pores. A high-pressure, water-wet, transparent micromodel with pores resembling a sandstone rock was used to visualize CH4 hydrate formation ...
• #### Quantification of Cold-Ion Beams in a Magnetic Reconnection Jet ﻿

(Journal article; Peer reviewed, 2021)
Cold (few eV) ions of ionospheric origin are widely observed in the lobe region of Earth’s magnetotail and can enter the ion jet region after magnetic reconnection is triggered in the magnetotail. Here, we investigate a ...
• #### Quantifying the Lobe Reconnection Rate During Dominant IMF By Periods and Different Dipole Tilt Orientations ﻿

(Journal article; Peer reviewed, 2021)
Lobe reconnection is usually thought to play an important role in geospace dynamics only when the Interplanetary Magnetic Field (IMF) is mainly northward. This is because the most common and unambiguous signature of lobe ...
• #### Quantitative Magnetic Resonance Imaging of Tissue Microvasculature and Microstructure in Selected Clinical Applications ﻿

(Doctoral thesis, 2022-06-03)
This thesis is based on four papers and aims to establish perfusion and diffusion measurements with magnetic resonance imaging (MRI) in selected clinical applications. While structural imaging provides invaluable geometric ...
• #### Quantitative Pore-Scale Analysis of CO2 Foam for CCUS ﻿

(Master thesis, 2019-12)
This experimental thesis is a part of ongoing projects lead by the Reservoir Physics group at the Department of Physics and Technology, University of Bergen. The main objectives of this thesis were to develop image analysis ...
• #### Quantum control and characterization of ultrafast ionization with orthogonal two-color laser pulses ﻿

(Peer reviewed; Journal article, 2020-01-14)
We study ultrafast ionization dynamics using orthogonally polarized two-color (OTC) laser pulses involving the resonant “first plus second” (ω + 2ω) scheme. The scheme is illustrated by numerical simulations of the ...
• #### Quark self-energy and condensates in NJL model with external magnetic field ﻿

(Journal article; Peer reviewed, 2021)
In a one-flavor NJL model with a finite temperature, chemical potential, and external magnetic field, the self-energy of the quark propagator contains more condensates besides the vacuum condensate. We use Fierz identity ...
• #### Quarkonium measurements in nucleus–nucleus collisions with ALICE ﻿

(Peer reviewed; Journal article, 2019)
Quarkonia, i.e. bound states of bb¯ and cc¯ quarks, are powerful observables to study the properties of nuclear matter under extreme conditions. The formation of a Quark-Gluon Plasma (QGP), which is predicted by lattice ...
• #### Quarkonium production in p-Pb collisions with ALICE ﻿

(Peer reviewed; Journal article, 2019)
ALICE has measured quarkonium production in p-Pb collisions at backward (−4.46 < ycms < −2.96), mid (−1.37 < ycms < 0.43) and forward (2.03 < ycms < 3.53) rapidity (y) regions down to zero transverse momentum (pT). The ...
• #### Quarkyonic matter from hydro and rapid freeze out ﻿

(Peer reviewed; Journal article, 2009)
Quarkyonic matter is a predicted phase between deconfined ideal QGP and Hadronic matter where the dominant degrees of freedom are quarks. Collective flow measurements indicate that the flow developed in QGP, as flow ...
• #### Quenching effects in the cumulative jet spectrum ﻿

(Journal article; Peer reviewed, 2021)
The steeply falling jet spectrum induces a bias on the medium modifications of jet observables in heavy-ion collisions. To explore this effect, we develop a novel analytic framework to study the quenched jet spectrum and ...
• #### R-parity violating chargino decays at the LHC ﻿

(Peer reviewed; Journal article, 2014-12)
Supersymmetric models with R-parity violation (RPV) have become more popular following the lack of any excess of missing energy events at the 8 TeV LHC. To identify such models, the suggested searches generally rely on the ...
• #### Radiation treatment monitoring using multimodal functional imaging: PET/CT (18F-Fluoromisonidazole & 18F-Fluorocholine) and DCE-US ﻿

(Peer reviewed; Journal article, 2015-12-18)
Background: This study aims to assess the effect of radiation treatment on the tumour vasculature and its downstream effects on hypoxia and choline metabolism using a multimodal approach in the murine prostate tumour model ...
• #### The Randall-Sundrum radion: Production Through Gluon Fusion, and Two-Photon Decay ﻿

(Master thesis, 2000)
• #### A Rapid Gamma-Ray Glow Flux Reduction Observed From 20 km Altitude ﻿

(Journal article; Peer reviewed, 2021)
Two gamma-ray glows were observed by a high-altitude NASA ER-2 aircraft flying at 20 km altitude over a thunderstorm in Colorado, USA. The flux of the first glow rapidly intensified and then abruptly decreased within a few ...
• #### Rapidity and transverse-momentum dependence of the inclusive J/$mathbf{\psi}$ nuclear modification factor in p-Pb collisions at $\mathbf{\sqrt{\textit{s}_{NN}}}=5.02$ TeV ﻿

(Peer reviewed; Journal article, 2015-06)
We have studied the transverse-momentum $p_{\rm T}$ dependence of the inclusive J/\).psi\) production in p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV, in three center-of-mass rapidity $y_{\rm cms}$ regions, ...
• #### Reaching towards higher masses of supersymmetric particles decaying to tau leptons ﻿

(Master thesis, 2014-06-30)
This thesis presents an optimisation of the search for SUSY in final states with one tau lepton, jets and missing transverse energy. The SUSY model considered is mSUGRA with the parameter values: A_0 = -2m0, tan(beta) = ...
• #### Reactive transport modelling of hydrate phase transition dynamics in porous media ﻿

(Doctoral thesis, 2015-03-27)
Gas hydrate is believed to be so abundant in nature that some estimates suggest it contains more than two times equivalent energy of the whole fossil fuels on Earth. Besides, reservoir hydrates have other important aspects ...
• #### Reactive Transport of CO2 in Saline Aquifers with implicit geomechanical analysis ﻿

(Peer reviewed; Journal article, 2009)
Geological storage of CO2 in saline aquifers is a promising way to reduce the concentration of the greenhouse gas in the atmosphere. Injection of CO2 will, however, lead to dissolution of minerals in regions of lowered pH ...
• #### Recalibration of the MEPED Proton Detectors Onboard NOAA POES Satellites ﻿

(Master thesis, 2013-07-04)
In this thesis we have calibrated energetic proton data from the solid state detectors of the MEPED instrument onboard the satellites NOAA 15, 16, 17, 18, and MetOp 02. All these satellites are part of the NOAA/POES program, ...