Department of Physics and Technology
Nye registreringer
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Fibres in Heritage Objects : Identification and Characterisation by Imaging Techniques
(Doctoral thesis, 2021-08-27)The work presented in this thesis focuses on the identification and characterisation of plant fibres from cultural heritage objects. The main emphasis is on method development (Archaeometry) in the field of optical microscopy. ... -
Harvesting energy from light and water droplets by covering photovoltaic cells with transparent polymers
(Journal article; Peer reviewed, 2021)Energy harvesting of sunlight is often done using photovoltaic cells covered by a protective layer of polymer or glass. Currently, this layer does not have any other function than being transparent and protective, but its ... -
Characteristics of fragmented aurora-like emissions (FAEs) observed on Svalbard
(Journal article; Peer reviewed, 2021)This study analyses the observations of a new type of small-scale aurora-like feature, which is further referred to as fragmented aurora-like emission(s) (FAEs). An all-sky camera captured these FAEs on three separate ... -
Graphene and graphene oxide on Ir(111) are transparent to wetting but not to icing
(Journal article; Peer reviewed, 2021)Anti-icing coatings reduce the freezing onset temperature for water by changing the chemical and physical environment at the water-substrate interface to prevent ice nucleation and growth. Graphene oxide has several ... -
Use of biodegradable colloids and carbon black nanofluids for solar energy applications
(Journal article; Peer reviewed, 2021)The conversion of solar energy to heat can be performed in direct absorption solar collectors, where the radiation from the sun is absorbed by a fluid. There are various types of fluids that can be used, and recently, ... -
A numerical study of flow field and particle deposition in nasal channels with deviant geometry
(Journal article; Peer reviewed, 2021)Deviant geometry of nasal channels results in significant changes to nasal aerodynamics that alter flow resistance, sensation, and the ability to filter aerosols. The invasive, operative modification of nasal geometry might ... -
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, ... -
Effects of motion correction, sampling rate and parametric modelling in dynamic contrast enhanced MRI of the temporomandibular joint in children affected with juvenile idiopathic arthritis
(Journal article; Peer reviewed, 2021)The temporomandibular joint (TMJ) is typically involved in 45–87% of children with Juvenile Idiopathic Arthritis (JIA). Accurate diagnosis of JIA is difficult as various clinical tests, including MRI, disagree. The purpose ... -
Dual-Lobe Reconnection and Horse-Collar Auroras
(Journal article; Peer reviewed, 2020)We propose a mechanism for the formation of the horse-collar auroral configuration during periods of strongly northward interplanetary magnetic field (IMF), invoking the action of dual-lobe reconnection (DLR). Auroral ... -
Substorm Current Wedge: Energy Conversion and Current Diversion
(Journal article; Peer reviewed, 2020)Using a magnetohydrodynamic simulation of magnetotail reconnection, flow bursts, and dipolarization, we further investigate the current diversion and energy flow and conversion associated with the substorm current wedge ... -
Coherent electron displacement for quantum information processing using attosecond single cycle pulses
(Journal article; Peer reviewed, 2020)Coherent electron displacement is a conventional strategy for processing quantum information, as it enables to interconnect distinct sites in a network of atoms. The efficiency of the processing relies on the precise control ... -
Laser Wake Field Collider
(Journal article; Peer reviewed, 2021)Recently NAno-Plasmonic, Laser Inertial Fusion Experiments (NAPLIFE) were proposed, as an improved way to achieve laser driven fusion. The improvement is the combination of two basic research discoveries: (i) the possibility ... -
Lower-Hybrid Drift Waves Driving Electron Nongyrotropic Heating and Vortical Flows in a Magnetic Reconnection Layer
(Journal article; Peer reviewed, 2020)We report measurements of lower-hybrid drift waves driving electron heating and vortical flows in an electron-scale reconnection layer under a guide field. Electrons accelerated by the electrostatic potential of the waves ... -
Multimodal analysis of gas-oil intermittent structures in co-current horizontal flow
(Chapter, 2020)Multiphase flow measurement aims to accurately quantify the flow rates of the fluids flowing through a pipe. Depending on the measurement principle, the accuracy can be heavily affected by the spatial distribution of flow ... -
Validating the Space Weather Modeling Framework (SWMF) for applications in northern Europe: Ground magnetic perturbation validation
(Journal article; Peer reviewed, 2020)In this study we investigate the performance of the University of Michigan’s Space Weather Modeling Framework (SWMF) in prediction of ground magnetic perturbations (ΔB) and their rate of change with time (dB/dt), which is ... -
Electron Acceleration and Thermalization at Magnetotail Separatrices
(Journal article; Peer reviewed, 2020)In this study we use the Magnetospheric Multiscale mission to investigate the electron acceleration and thermalization occurring along the magnetic reconnection separatrices in the magnetotail. We find that initially cold ... -
Electron Heating by Debye-Scale Turbulence in Guide-Field Reconnection
(Journal article; Peer reviewed, 2020)We report electrostatic Debye-scale turbulence developing within the diffusion region of asymmetric magnetopause reconnection with a moderate guide field using observations by the Magnetospheric Multiscale mission. We show ... -
Jet suppression from a small to intermediate to large radius
(Journal article; Peer reviewed, 2020)We present predictions for jet suppression from small to intermediate to very large radius, for high energy jets created in heavy ion collisions at the LHC. We find that jet suppression is surprisingly independent of the ... -
Daedalus: A low-flying spacecraft for in situ exploration of the lower thermosphere-ionosphere
(Journal article; Peer reviewed, 2020)The Daedalus mission has been proposed to the European Space Agency (ESA) in response to the call for ideas for the Earth Observation program's 10th Earth Explorer. It was selected in 2018 as one of three candidates for a ... -
Influence of Enhanced Planetary Wave Activity on the Polar Vortex Enhancement Related to Energetic Electron Precipitation
(Journal article; Peer reviewed, 2020)The Northern polar vortex experiences considerable interannual variability, which is also reflected to tropospheric weather. Recent research has established a link between polar vortex variations and energetic electron ...
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