Blar i Department of Physics and Technology på tittel
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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 ... -
Time sequence of TGFs and optical pulses detected by ASIM and a comparison of TGFs observed by different spacecrafts
(Master thesis, 2020-06-30)Terrestrial gamma-ray flashes (TGFs) are short energetic bursts of photons associated with lightning activity. TGFs are believed to be produced in relation to positive intracloud (IC+) lightning, during the upward propagation ... -
Time-dependent angular analysis of the decay B0s→J/ψϕ and extraction of ΔΓ s and the CP-violating weak phase ϕ s by ATLAS
(Peer reviewed; Journal article, 2012-12)A measurement of B0s→J/ψϕ decay parameters, including the CP -violating weak phase ϕ s and the decay width difference ΔΓ s is reported, using 4.9 fb−1 of integrated luminosity collected in 2011 by the ATLAS detector from ... -
To Measure the Efficiency of Energy Transfer Systems Under External
(Master thesis, 2014-06-03)Transfer of power wirelessly through magnetic resonance is a hot topic these days not only for low power consumer electronics like laptops, cell phones etc. but also for high power applications like electric cars, trains ... -
Top-quark physics at the CLIC electron-positron linear collider
(Journal article; Peer reviewed, 2019)The Compact Linear Collider (CLIC) is a proposed future high-luminosity linear electron-positron collider operating at three energy stages, with nominal centre-of-mass energies s√ = 380 GeV, 1.5 TeV, and 3 TeV. Its aim is ... -
Toward a Next Generation Particle Precipitation Model: Mesoscale Prediction Through Machine Learning (a Case Study and Framework for Progress)
(Journal article; Peer reviewed, 2021)We advance the modeling capability of electron particle precipitation from the magnetosphere to the ionosphere through a new database and use of machine learning (ML) tools to gain utility from those data. We have compiled, ... -
Toward the end-to-end optimization of particle physics instruments with differentiable programming
(Journal article; Peer reviewed, 2023)The full optimization of the design and operation of instruments whose functioning relies on the interaction of radiation with matter is a super-human task, due to the large dimensionality of the space of possible choices ... -
Towards a regulatory framework for the use of liquid hydrogen as a fuel for ships: Critical analysis of the prescriptive requirements for bunkering operations
(Master thesis, 2021-06-02)The global demand for energy increases rapidly with the growth in the population and a steady increase in the general standard of living. At the same time, the consumption of fossil fuels causes massive releases of greenhouse ... -
Towards Neural Charged Particle Tracking in Digital Tracking Calorimeters With Reinforcement Learning
(Journal article; Peer reviewed, 2023)We propose a novel technique for reconstructing charged particles in digital tracking calorimeters using reinforcement learning aiming to benefit from the rapid progress and success of neural network architectures without ...