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Occurrence Statistics of Horse Collar Aurora
(Journal article; Peer reviewed, 2022)Horse collar aurora (HCA) are an auroral feature where the dawn and dusk sector auroral oval moves polewards and the polar cap becomes teardrop shaped. They form during prolonged periods of northward interplanetary magnetic ... -
Oh no, it’s raining! A study of how information in online weather reports is interpreted, integrated, and used in everyday decision-making by laypeople
(Doctoral thesis, 2016-11-18)Different people in different occupations depend on weather forecasts to plan their work and recreational schedules. People with no expertise in meteorology frequently interpret weather forecasts and uncertainty information. ... -
On automatic data processing and well-test analysis in real-time reservoir management applications
(Doctoral thesis, 2011-06-30) -
On the accuracy of an interdigital electrostatic position sensor
(Journal article; Peer reviewed, 2020)In this work the induced voltage in an interdigital electrode when swept by a finite, triboelectrically charged dielectric surface is investigated. Finite element modelling fits well with the measured voltage as a function ... -
On the composite response of the MLT to major sudden stratospheric warming events with elevated stratopause
(Peer reviewed; Journal article, 2016-05)Based on a climate-chemistry model (constrained by reanalyses below ~50 km), the zonal-mean composite response of the mesosphere and lower thermosphere (MLT) to major sudden stratospheric warming events with elevated ... -
On the contribution of thermal excitation to the total 630.0 nm emissions in the northern cusp ionosphere
(Peer reviewed; Journal article, 2017-01)Direct impact excitation by precipitating electrons is believed to be the main source of 630.0 nm emissions in the cusp ionosphere. However, this paper investigates a different source, 630.0 emissions caused by thermally ... -
On the Creation, Depletion, and End of Life of Polar Cap Patches
(Journal article; Peer reviewed, 2023)Ionospheric convection patterns from the Super Dual Auroral Radar Network are used to determine the trajectories, transit times, and decay rates of three polar cap patches from their creation in the dayside polar cap ... -
On the design of Neutral Scanning Helium Atom Microscopes (SHeM) : Optimal configurations and evaluation of experimental findings
(Doctoral thesis, 2021-11-09)Scanning Helium Microscopes (SHeMs) are novel microscopy tools using neutral helium atoms as the imaging probe. Helium atoms have several advantages compared to other probes such as electrons or helium ions. Helium atoms ... -
On the High‐Energy Spectral Component and Fine Time Structure of Terrestrial Gamma Ray Flashes
(Journal article; Peer reviewed, 2019)Terrestrial gamma ray flashes (TGFs) are very short bursts of gamma radiation associated to thunderstorm activity and are the manifestation of the highest‐energy natural particle acceleration phenomena occurring on Earth. ... -
On the Impact of a Streaming Oxygen Population on Collisionless Magnetic Reconnection
(Journal article; Peer reviewed, 2020)Using 2.5-D Particle-In-Cell (PIC) simulations, we investigate how magnetotail reconnection is affected by a cold, streaming, oxygen plasma population, attributed to an ionospheric source, in the inflow region. As the ... -
On the Persistent Shape and Coherence of Pulsating Auroral Patches
(Peer reviewed; Journal article, 2018-05)The pulsating aurora covers a broad range of fluctuating shapes that are poorly characterized. The purpose of this paper is therefore to provide objective and quantitative measures of the extent to which pulsating auroral ... -
On the Potential for Optical Detection of Microplastics in the Ocean
(Journal article; Peer reviewed, 2023) -
On the Presence and Thermalization of Cold Ions in the Exhaust of Antiparallel Symmetric Reconnection
(Journal article; Peer reviewed, 2021)Using fully kinetic 2.5 dimensional particle-in-cell simulations of anti-parallel symmetric magnetic reconnection, we investigate how initially cold ions are captured by the reconnection process, and how they evolve and ... -
On the Production of Ionospheric Irregularities Via Kelvin-Helmholtz Instability Associated with Cusp Flow Channels
(Journal article; Peer reviewed, 2020)We present a multi‐instrument multiscale study of a channel of enhanced, inhomogeneous flow in the cusp ionosphere occurring on November 30, 2014. We provide evidence that strong Global Navigation Satellite System (GNSS) ... -
On the timing between terrestrial gamma ray flashes, radio atmospherics, and optical lightning emission
(Peer reviewed; Journal article, 2017)On 25 October 2012 the Reuven Ramaty High Energy Solar Spectroscope Imager (RHESSI) and the Tropical Rainfall Measuring Mission (TRMM) satellites passed over a thunderstorm on the coast of Sri Lanka. RHESSI observed a ... -
On-line dose-guidance to account for inter-fractional motion during proton therapy
(Peer reviewed; Journal article, 2019-01)Background and purpose Proton therapy (PT) of extra-cranial tumour sites is challenged by density changes caused by inter-fractional organ motion. In this study we investigate on-line dose-guided PT (DGPT) to account ... -
On-line X-ray fluorescence analysis applied to industrial processes and environmental monitoring
(Master thesis, 2000)Abstract X-ray stimulated fluorescence analysis is a powerful and widely used tool for determining the concentration of chemical species in materials. Presently, this is done by taking and preparing samples for off-line ... -
One-dimensional charged kaon femtoscopy in p-Pb collisions at √sNN = 5.02 TeV
(Peer reviewed; Journal article, 2019)The correlations of identical charged kaons were measured in p-Pb collisions at √sNN = 5.02 TeV by the ALICE experiment at the LHC. The femtoscopic invariant radii and correlation strengths were extracted from one-dimensional ... -
One-dimensional pion, kaon, and proton femtoscopy in Pb-Pb collisions at \(\sqrt{s_{\rm {NN}}}\) =2.76 TeV
(Peer reviewed; Journal article, 2015-11)The size of the particle emission region in high-energy collisions can be deduced using the femtoscopic correlations of particle pairs at low relative momentum. Such correlations arise due to quantum statistics and Coulomb ... -
One-dimensional spin-polarized surface states: A comparison of Bi(112) with other vicinal bismuth surfaces
(Journal article; Peer reviewed, 2023)Vicinal surfaces of bismuth are unique test beds for investigating one-dimensional (1D) spin-polarized surface states that may one day be used in spintronic devices. In this paper, such states have been observed for the ...