Browsing Department of Physics and Technology by Title
Now showing items 1573-1592 of 2153
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The relationship between interhemispheric asymmetries in polar ionospheric convection and the magnetic field line footpoint displacement field
(Journal article; Peer reviewed, 2022)Polar electrodynamics is largely controlled by solar wind and magnetospheric forcing. Different conditions can make plasma convection and magnetic field disturbances asymmetric between hemispheres. So far, these asymmetries ... -
The Relationship Between Large Scale Thermospheric Density Enhancements and the Spatial Distribution of Poynting Flux
(Journal article; Peer reviewed, 2021)Large thermospheric neutral density enhancements in the cusp region have been examined for many years. The Challenging Minisatellite Payload (CHAMP) satellite for example has enabled many observations of the perturbation, ... -
Relationship Between Microbial Growth and Hydraulic Properties at the Sub-Pore Scale
(Journal article; Peer reviewed, 2021)Accumulation of microbial biomass and its influence on porous media flow were investigated under saturated flow conditions. Microfluidic experiments were performed with model organisms, and their accumulation was observed ... -
Relative particle yield fluctuations in Pb--Pb collisions at √sNN=2.76 TeV
(Peer reviewed; Journal article, 2019)First results on K/π, p/π and K/p fluctuations are obtained with the ALICE detector at the CERN LHC as a function of centrality in Pb--Pb collisions at sNN−−−√=2.76 TeV. The observable νdyn, which is defined in terms of ... -
Relativistic effects in photoionizing a circular Rydberg state in the optical regime
(Journal article; Peer reviewed, 2020)We study the photoionization process of a hydrogen atom initially prepared in a circular Rydberg state. The atom is exposed to a two-cycle laser pulse with a central wavelength of 800 nm. Before the atom approaches saturation, ... -
Resolution of the ATLAS muon spectrometer monitoreddrift tubes in LHC Run 2
(Peer reviewed; Journal article, 2019)The momentum measurement capability of the ATLAS muon spectrometer relies fundamentally on the intrinsic single-hit spatial resolution of the monitored drift tube precision tracking chambers. Optimal resolution is achieved ... -
Resonances in e+e- annihilation near 2.2 GeV
(Journal article; Peer reviewed, 2020-01-22)Using the initial-state radiation method, the e+e−→KSKL cross section from 1.98 to 2.54 GeV is measured in a data sample of 469 fb−1 collected with the BABAR detector. The results are used in conjunction with previous BABAR ... -
The response of permafrost and high latitude ecosystems under large scale stratospheric aerosol injection and its termination
(Peer reviewed; Journal article, 2019-04-15)Climate engineering arises as one of the potential methods that could contribute to meeting the 1.5oC global warming target agreed under the Paris Agreement. We examine how permafrost and high latitude vegetation respond ... -
Results from the EPICAL-2 ultra-high granularity electromagnetic calorimeter prototype
(Journal article; Peer reviewed, 2023)A prototype of a new type of calorimeter has been designed and constructed, based on a silicon–tungsten sampling design using pixel sensors with digital readout. It makes use of the ALPIDE sensor developed for the ALICE ... -
Results from the intercalibration of optical low light calibration sources 2011
(Peer reviewed; Journal article, 2012-05-03)Following the 38th Annual European Meeting on Atmospheric Studies by Optical Methods in Siuntio in Finland, an intercalibration workshop for optical low light calibration sources was held in Sodankylä, Finland. The main ... -
Results of the Electron Drift Instrument on Cluster
(Journal article; Peer reviewed, 2021)The electron drift instrument (EDI) on Cluster pioneered a new method of measuring electric fields, using a beam of electrons to sample the drift velocity over a km-scale gyro orbit. The technique is especially well suited ... -
Retrieval practice of a hierarchical principle structure in university introductory physics: Making stronger students
(Journal article; Peer reviewed, 2020)Introductory physics is taught to several hundred thousand university students every year. It is seen as especially difficult by many and the failure rate is often high. A relevant question is whether one can increase the ... -
A Review of Polymer Gel Utilization in Carbon Dioxide Flow Control at the Core and Field Scale
(Journal article; Peer reviewed, 2023)Polymer gel has been used for water conformance control for several decades and may have significant potential in remediating unfavorable carbon dioxide (CO2) flow in the subsurface. High-mobility CO2 may channel quickly ... -
Revisiting transverse momentum broadening in dense QCD media
(Journal article; Peer reviewed, 2021)We reconsider the problem of transverse momentum broadening of a highly energetic parton suffering multiple scatterings in dense colored media, such as the thermal quark-gluon plasma or large nuclei. In the framework of ... -
Rheological properties of hydrophobically modified anionic polymers: The effect of varying salinity in polymer solution
(Master thesis, 2017-06-16)A new class of polymers, named ‘hydrophobically modified water-soluble polymers’, has been developed as an alternative to the more commonly used polyelectrolytes in enhanced oil recovery (EOR) applications. These polymers ... -
Rheology of Synthetic Polymers in Porous Media
(Master thesis, 2014-06-02)This master thesis is written out of the Centre for Integrated Petroleum Research (UNI CIPR) at the University of Bergen (UiB). The aim of this study has been to describe the polymer rheology of the high molecular weight ... -
Risiko for spredning av flammer og røyk gjennom brannskiller ved endringer i bruk av sprinkler og røykkontroll i boligkvarter på petroleumsinnretninger.
(Master thesis, 2016-09-27)Målet med oppgaven har vært å undersøke hvordan endringer i bruk av sprinkler og brannspjeld i boligkvarter på petroleumsinnretninger, har påvirket risiko for spredning av flammer og røyk gjennom ventilasjonskanaler. ... -
The Role of Resistivity on the Efficiency of Magnetic Reconnection in MHD
(Journal article; Peer reviewed, 2022)Using a resistive MagnetoHydroDynamic (MHD) simulation, we study how the magnitude and shape of diffusion influence magnetic reconnection. Specifically, we investigate how and why the reconnection rate is influenced by ... -
The Role of Safety in the Framing of the Hydrogen Economy by Selected Groups of Stakeholders
(Journal article; Peer reviewed, 2022)While the international discourse on the hydrogen economy tends to focus on the importance of enabling the transition from fossil to renewable energy sources and the prospects for innovation and value creation, the ... -
Room-Scale CO2 Injections in a Physical Reservoir Model with Faults
(Journal article; Peer reviewed, 2024)We perform a series of repeated CO2 injections in a room-scale physical model of a faulted geological cross-section. Relevant parameters for subsurface carbon storage, including multiphase flows, capillary CO2 trapping, ...