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Frequency-Adaptive Energy Control for Grid-Forming MMCs Under Unbalanced Conditions
(Peer reviewed; Journal article, 2023)This paper presents a frequency-adaptive energy control strategy for a Modular Multilevel Converter (MMC) which is suitable for grid-forming operation under unbalanced conditions. The average components of the energy sum ... -
Frequency-Dependent Aerodynamic Damping and Inertia in Linearized Dynamic Analysis of Floating Wind Turbines
(Journal article; Peer reviewed, 2020)In frequency-domain (FD) models of floating wind turbines (FWT), it is common to regard the interaction between nacelle motions and thrust by means of a constant aerodynamic damping coefficient. This approach is effective ... -
Frequency-dependent cable modelling for small-signal stability analysis of VSC-HVDC systems
(Journal article; Peer reviewed, 2016)State-of-the-art time-domain models of power cables account for the frequency dependency of physical parameters to enable accurate transient simulations of high-voltage transmission schemes. Owing to their formulation, ... -
Frequency-dependent deficits in head steadiness in patients with nonspecific neck pain
(Journal article; Peer reviewed, 2019)Motor control impairments are reported in patients with nonspecific neck pain but the particular deficits in underlying regulatory systems are not known. Head steadiness is controlled both by voluntary and reflex systems ... -
Frequency-dependent modulation of cerebellar excitability during the application of non-invasive alternating current stimulation
(Peer reviewed; Journal article, 2020)Background it is well-known that the cerebellum is critical for the integrity of motor and cognitive actions. Applying non-invasive brain stimulation techniques over this region results in neurophysiological and behavioural ... -
Frequency-dependent source and load impedances in power systems based on power electronic converters
(Chapter, 2016)Representations of power systems by frequency dependent impedance equivalents is an emerging technique in dynamic analyses of power systems including power electronic converters. The technique has been applied for decades ... -
Frequency-dependent wave velocities in sediments and sedimentary rocks: Laboratory measurements and evidences
(Journal article; Peer reviewed, 2016)The pioneering work of Mike Batzle and his colleagues has provided a fundamental understanding of mechanisms behind dispersion and attenuation of elastic waves in fluid-saturated rocks. It also has made way for a realization ... -
Frequency-depth-dependent spherical reflection response from the sea surface - a transmission experiment
(Journal article; Peer reviewed, 2018)In academia and the industry, there is an increasing interest in generating and recording low seismic frequencies, which lead to better data quality, deeper signal penetration and can be important for full-waveform inversion. ... -
Fresh and frozen stored fillets of Atlantic mackerel (Scomber scombrus)– effect on oxidation and sensory quality of canned mackerel fillets
(Chapter, 2016)Atlantic mackerel caught off the West Coast of Norway were filleted and frozen in 20 kg blocks at landing. The fillets were canned with tomato sauce when fresh and after 1, 3, 6, 9 and 12 months of frozen storage. The ... -
“Freshman’s week”: characteristics associated with participation and experiencing adverse effects
(Journal article; Peer reviewed, 2018)Background “Freshman’s week” (FW) is a Norwegian initiation ritual to higher education. Previous research has suggested that FW-participation is associated with better social adjustment to the student setting, as well as ... -
Freshwater plastispheres as a vector for foodborne bacteria and viruses
(Peer reviewed; Journal article, 2023)There is growing evidence that plastic particles can accumulate microorganisms that are pathogenic to humans or animals. In the current study, the composition of the plastispheres that accumulated on polypropylene (PP), ... -
Freznel zone in VTI and orthorhombic media
(Journal article; Peer reviewed, 2017)The reflecting zone in the subsurface insonified by the first quarter of a wavelength and the portion of the reflecting surface involved in these reflections is called the Fresnel zone or first Fresnel zone. The horizontal ... -
Friction Fluctuations of Gold Nanoparticles in the Superlubric Regime
(Journal article; Peer reviewed, 2018)Superlubricity, or alternatively termed structural (super)lubrictiy, is a concept where ultra-low friction is expected at the interface between sliding surfaces if these surfaces are incommensurate and thus unable to ... -
Friction Mechanisms by Carboxylic Acids in Aqueous Lubricants
(Journal article; Peer reviewed, 2018)Carboxylic acids are well known for their friction-reducing abilities driven by the formation of low-shear-strength films on the steel surface. However, understanding of the adsorption mechanisms especially in polar solvents ... -
Friction models for evaluating dynamic stresses in non-bonded flexible risers
(Journal article; Peer reviewed, 2017)This paper addresses friction models used for evaluating dynamic stresses in non-bonded flexible risers. A review of the most commonly used methods to model friction between layers in such structures was performed. Four ... -
Friction stir welding/processing of mg-based alloys: A critical review on advancements and challenges
(Peer reviewed; Journal article, 2021)Friction stir welding (FSW) and friction stir processing (FSP) are two of the most widely used solid-state welding techniques for magnesium (Mg) and magnesium alloys. Mg-based alloys are widely used in the railway, aerospace, ... -
Friction vs. Area Scaling of Superlubric NaCl-Particles on Graphite
(Journal article; Peer reviewed, 2019)Structural lubricity is an intriguing tribological concept, where extremely low friction is anticipated, if two surfaces in relative motion do not share the same lattice structure and consequently instabilities originating ... -
Friction welding of selective laser melted Ti6Al4V parts
(Journal article; Peer reviewed, 2017)Ti6Al4V alloy samples fabricated by selective laser melting (SLM) were subjected to solid-state welding friction welding (FW). The welded alloy exhibits a α´-martensitic microstructure in the form of platelets with dimensions ... -
Friction, facts and fiction: Hybridity in Jean Potocki’s ‘Oriental’ travelogues
(Chapter; Peer reviewed, 2015) -
Frictional fluid instabilities shaped by viscous forces
(Peer reviewed; Journal article, 2023)Multiphase flows involving granular materials are complex and prone to pattern formation caused by competing mechanical and hydrodynamic interactions. Here we study the interplay between granular bulldozing and the stabilising ...