Browsing Department of Physics and Technology by Title
Now showing items 2137-2156 of 2287
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Testing hadronic interaction models using a highly granular silicon-tungsten calorimeter
(Peer reviewed; Journal article, 2015-09) -
Testing the mirror symmetry of Birkeland and ionospheric currents with respect to magnetic latitude, dipole tilt angle, and IMF By
(Journal article; Peer reviewed, 2022)It is often assumed that on average, polar ionospheric electrodynamics in the Northern and Southern Hemispheres are mirror symmetric or antisymmetric with respect to the interplanetary magnetic field By component and the ... -
Testing the presence of CP violation in the 2HDM
(Peer reviewed; Journal article, 2015-04-27)We review CP properties of the Two-Higgs-Doublet model. In particular, we show that sponta- neous CP violation occurs in the parameter space on the border between regions allowing explicit CP violation and those where there ... -
Testing the system size dependence of hydrodynamical expansion and thermal particle production with π, K, p, and ϕ in Xe–Xe and Pb–Pb collisions with ALICE
(Peer reviewed; Journal article, 2019-01-22)We present new results on transverse momentum spectra, integrated yields, and mean transverse momenta of pions, kaons, and protons, as well as of ϕ-mesons for various centrality classes measured in Pb–Pb and Xe–Xe collisions ... -
The application of CW and FM sonar technology to detect a decrease in air in the swim bladder of Atlantic salmon, measurements and modeling
(Master thesis, 2022-06-01)Salmon lice and poor surface conditions are challenging for salmon aquaculture. A new innovative preventative solution is to submerge the cages below the sea surface to avoid the surface-dwelling infestation of lice larvae. ... -
The impact of medium energy electrons on mesospheric chemistry and dynamics
(Master thesis, 2021-10-28) -
The Neutral Helium Microscope
(Master thesis, 2022-06-01) -
The role of Resistivity on the efficiency of Magnetic Reconnection in MHD
(Master thesis, 2021-06-01)Magnetic reconnection is a fundamental plasma process, which can explosively convert magnetic energy to particle energy. When reconnection operates, it releases almost all of the energy stored in the magnetic field and ... -
Theoretical analysis of erosion in elbows due to flows with nano- and micro-size particles
(Journal article; Peer reviewed, 2020-02-05)The present paper focuses on the issue of erosion due to fluid flow laden with nano- and microparticles. We investigated the case of a pipe elbow using theoretical analysis and numerical simulations. For the case when the ... -
Theoretical studies of CO2 hydrates formation and dissociation in cold aquifers using RetrasoCodeBright simulator
(Peer reviewed; Journal article, 2014)Abstract: - Hydrates of CO2 and water can form during aquifer storage if the reservoir has regions where conditions of pressure and temperature are inside the hydrate forming conditions. A very common assumption is that ... -
Theoretical studies of Methane Hydrate Dissociation in porous media using RetrasoCodeBright simulator
(Peer reviewed; Journal article, 2012)Methane hydrates in reservoir are generally not in chemical equilibrium, there may be several competing hydrate phase transitions like for instance hydrate dissociation due to pressure or temperature changes, hydrate ... -
Thermal Neutron Detection Efficiency of a Gadolinium-Based Silicon Pixel Sensor
(Master thesis, 2020-12-18)This thesis is a "proof-of-principle" study which aims to assess the feasibility of ALPIDE as a neutron imaging sensor when coupled with a natural-Gd converter foil. The neutron detection efficiency of a Gd-based ALPIDE ... -
Thermally excited 630.0 nm emissions in the polar ionosphere
(Doctoral thesis, 2018-08-24)This thesis investigates the importance and significance of thermally excited 630.0 nm emissions in the cusp and polar ionosphere. Thermal excitation by heated ambient electrons in the cusp and polar ionosphere is a rarely ... -
Thermodynamic and Kinetic Modeling of CH4/CO2 Hydrates Phase transitions
(Peer reviewed; Journal article, 2013)Natural gas hydrates in reservoirs are thermodynamically unstable due to exposure to mineral surfaces and possibly undersaturated phases of water and hydrate formers. Changes in global temperatures also alter the stability ... -
Thermomagnetic convection in a differentially heated flow loop
(Master thesis, 2020-07-03) -
Three principal components describe the spatiotemporal development of mesoscale ionospheric equivalent currents around substorm onsets
(Journal article; Peer reviewed, 2023)Substorms are a commonly occurring but insufficiently understood form of dynamics in the coupled magnetosphere–ionosphere system, associated with space weather disturbances and auroras. We have used principal component ... -
Three-Dimensional Magnetic Reconnection With a Spatially Confined X-Line Extent: Implications for Dipolarizing Flux Bundles and the Dawn-Dusk Asymmetry
(Peer reviewed; Journal article, 2019)Using 3‐D particle‐in‐cell simulations, we study magnetic reconnection with the X‐line being spatially confined in the current direction. We include thick current layers to prevent reconnection at two ends of a thin current ... -
Tilstandsovervåkning av undervanns motordrift med lange forsyningskabler
(Master thesis, 2010-06-01)Hensikten med denne mastergradsoppgaven er å sette opp et testanlegg bestående av forsyningskabel og induksjonsmotor for å teste om tilstandsovervåkning kan utføres ved strømanalyse av lange forsyningskabler. Det skal ... -
Time domain simulations of preliminary breakdown pulses in natural lightning
(Peer reviewed; Journal article, 2015-06)Lightning discharge is a complicated process with relevant physical scales spanning many orders of magnitude. In an effort to understand the electrodynamics of lightning and connect physical properties of the channel to ... -
Time evolution of storms producing terrestrial gamma-ray flashes using era5 reanalysis data, gps, lightning and geo-stationary satellite observations
(Journal article; Peer reviewed, 2021)In this article, we report the first investigation over time of the atmospheric conditions around terrestrial gamma-ray flash (TGF) occurrences, using GPS sensors in combination with geostationary satellite observations ...