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High-latitude magnetic fields and their time derivatives: interhemispheric similarities
(Peer reviewed; Journal article, 2013-02-19)There are two simple and objective measures of geomagnetic activity: the daily range of field components, and the daily maximum of the time derivative of the field. We study these using data from the geomagnetic latitude ... -
High-order harmonic generation from graphene: Strong attosecond pulses with arbitrary polarization
(Peer reviewed; Journal article, 2013-05-03)We explore high-order harmonic generation (HHG) from a graphene sheet exposed to intense femtosecond laser pulses based on the Lewenstein model. It is demonstrated that the HHG cutoff frequency increases with graphene size ... -
High-precision limits on W–W′and Z–Z′ mixing from diboson production using the full LHC Run 2 ATLAS data set
(Journal article; Peer reviewed, 2020)The full ATLAS Run 2 data set with time-integrated luminosity of 139fb−1 in the diboson channels in hadronic final states is used to probe a simple model with an extended gauge sector (EGM), proposed by Altarelli et al., ... -
Higher harmonic flow coefficients of identified hadrons in Pb-Pb collisions at \(\sqrt{s_{\rm NN}}\) = 2.76 TeV
(Peer reviewed; Journal article, 2016-09)The elliptic, triangular, quadrangular and pentagonal anisotropic flow coefficients for \(\pi^{\pm}\). \(\mathrm{K}^{\pm}\) and p+\).overline{\mathrm{p}}\) in Pb-Pb collisions at \(\sqrt{s_\mathrm{{NN}}} = 2.76\) TeV were ... -
Higher harmonic non-linear flow modes of charged hadrons in Pb-Pb collisions at √sNN = 5.02 TeV
(Journal article; Peer reviewed, 2020)Anisotropic flow coefficients, vn, non-linear flow mode coefficients, χn,mk, and correlations among different symmetry planes, ρn,mk are measured in Pb-Pb collisions at sNN−−−√ = 5.02 TeV. Results obtained with multi-particle ... -
Higher moment fluctuations of identified particle distributions from ALICE
(Peer reviewed; Journal article, 2019)Cumulants of conserved charges fluctuations are regarded as a potential tool to study the criticality in the QCD phase diagram and to determine the freeze-out parameters in a model-independent way. At LHC energies, the ... -
Higher-order corrections to heavy-quark jet quenching
(Peer reviewed; Journal article, 2019-07-03)We calculate higher-order corrections to the quenching factor of heavy-quark jets due to hard, in-medium splittings in the framework of the BDMPS-Z formalism. These corrections turn out to be sensitive to a single mass ... -
Highlights of experimental results from ALICE
(Peer reviewed; Journal article, 2017-11)Highlights of recent results from the ALICE collaboration are presented. The collision systems investigated are Pb–Pb, p–Pb, and pp, and results from studies of bulk particle production, azimuthal correlations, open and ... -
High‐density magnetospheric He+ at the dayside magnetopause and its effect on magnetic reconnection
(Journal article; Peer reviewed, 2021)Observations from the Magnetospheric Multiscale (MMS) mission are used to quantify the maximum effect of magnetospheric H+ and He+ on dayside magnetopause reconnection. A data base of current-sheet crossings from the first ... -
High‐density O+ in Earth's outer magnetosphere and its effect on dayside magnetopause magnetic reconnection
(Journal article; Peer reviewed, 2019)The warm plasma cloak is a source of magnetospheric plasma that contain significant O+. When the O+ density in the magnetosphere near the magnetopause is >0.2 cm‐3 and the H+ density is <1.5 cm‐3, then O+ dominates the ... -
History Matching with Reduced Parameterization and Fast Streamline-based Sensitivities
(Master thesis, 2012-09-27)The main goal of history matching is to construct updated models capable of predicting the future performance of the reservoir more accurately. History matching method requires a solution of inverse problem to minimize the ... -
Holographic interferometry and its application in visualizing particle movements in continuous flow
(Master thesis, 2004)This thesis presents the work performed at the Department of Physics and Technology at the University of Bergen during a collaborative project funded by Statoil. The parties in this collaboration were the University of ... -
Holographic multi-stereogram constructed from computer images : Applied 3-D printer
(Master thesis, 1996)The aim of this thesis is to develop a method to convert computer images to a holographic film plate. In the recording process of holographic multi-stereograms, one uses a liquid crystal display (LCD) to show 70 different ... -
How different safety barriers affect the margin between available and required evacuation time
(Master thesis, 2015-06-01)The main purpose of this thesis has been to document that people can evacuate to temporarily safe locations / safe distances during the defined escalating jet fire scenario. It has been important to document that available ... -
How do laypeople evaluate the degree of certainty in a weather report? A case study of the use of the Web service yr.no
(Peer reviewed; Journal article, 2014-07)Many people depend on and use weather forecasts to plan their schedules. In so doing, ordinary people with no expertise in meteorology are frequently called upon to interpret uncertainty with respect to weather forecasts. ... -
How Often Do Thermally Excited 630.0 nm Emissions Occur in the Polar Ionosphere?
(Peer reviewed; Journal article, 2018-01)This paper studies thermally excited emissions in the polar ionosphere derived from European Incoherent Scatter Svalbard radar measurements from the years 2000–2015. The peak occurrence is found around magnetic noon, where ... -
How the IMF By induces a By component in the closed magnetosphere and how it leads to asymmetric currents and convection patterns in the two hemispheres
(Peer reviewed; Journal article, 2015-11-12)We used the Lyon-Fedder-Mobarry global magnetohydrodynamics model to study the effects of the interplanetary magnetic field (IMF) By component on the coupling between the solar wind and magnetosphere-ionosphere system. ... -
How to Improve Visibility in Turbid Water
(Master thesis, 2021-06-01) -
A hybrid multi-particle approach to range assessment-based treatment verification in particle therapy
(Journal article; Peer reviewed, 2023)Particle therapy (PT) used for cancer treatment can spare healthy tissue and reduce treatment toxicity. However, full exploitation of the dosimetric advantages of PT is not yet possible due to range uncertainties, warranting ... -
A Hybrid Numerical Method for 3D Multiphysics Modeling of Ultrasonic Transit-Time Flowmeters : Including Sound Propagation in Real Pipe Flows
(Doctoral thesis, 2023-10-20)Ultralyd mengdemålere av typen Ultrasonic Transit-Time Flowmeters (UTTF) og deres modellering er hovedfokus i denne avhandlingen. UTTF kan kategoriseres i clamp-on og inline-målere avhengig av behovene til applikasjoner ...