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On the Characteristics of Internal Software Startups
(Chapter, 2022)In recent years, more attention has been given to internal software startups in practice and in research alike, yet the concept is not fully understood. Nor is it clear whether or not it significantly differs from stand-alone ... -
On the choice of closure complexity in anisotropic drag closures for filtered Two Fluid Models
(Journal article; Peer reviewed, 2019)Filtered Two Fluid Models (fTFMs) aim to enable accurate industrial-scale simulations of fluidized beds by means of closures accounting for the effects of bubbles and clusters. The present study aims to improve anisotropic ... -
On the cleansing and inspection of GPS ephemeris data 2000–2016
(Chapter, 2017)Archived GPS ephemeris data for years 2000-2016 is investigated by cleansing and precision measures. The goal of this work was twofold: (1) to reveal and remove incorrect ephemeris data so that the cleansed data is as close ... -
On the concept of sustainability - assessing th sustainability of large public Investment projects
(Journal article; Peer reviewed, 2014)Assessing the sustainability of large public investment projects within the general framework of three-pillar thinking is a complex affair. Such ventures involve multiple actors – e.g. planners from various disciplines ... -
On the Contextualization of Event-Activity Mappings
(Journal article; Peer reviewed, 2019)Event log files are used as input to any process mining algorithm. A main assumption of process mining is that each event has been assigned to a distinct process activity already. However, such mapping of events to activities ... -
On the Design Considerations of New Offloading Hose Applied on a Turret Moored FPSO
(ASME Digital collection;OMAE2017-61410, Chapter, 2017-06)Offloading hoses are used to transfer crude oil or liquid petroleum products from a fixed offshore production platform/floating production, storage and offloading (FPSO) unit to shuttle tankers. The hoses are subjected to ... -
On the dimension of multivariate spline spaces
(SINTEF Rapport;, Research report, 2013)In this paper, we define the topological structures for an arbitrary axis-aligned box partition of a parametric d-dimensional box-shaped limited domain in R^d. Then we define the d-variate spline space over this partition ... -
On the Direct Reduction Phenomena of Bauxite Ore Using H2 Gas in a Fixed Bed Reactor
(Peer reviewed; Journal article, 2020)The Bayer Process is the dominant industrial method to produce alumina from bauxite ore. Due to the generation of large amounts of Bauxite Residue (red mud), an alternative method, called the Pedersen Process, is of our ... -
On the dispersive wave-dynamics of 2 x 2 relaxation systems
(Journal article; Peer reviewed, 2012)We consider hyperbolic conservation laws with relaxation terms. By studying the dispersion relation of the solution of general linearized 2 × 2 hyperbolic relaxation systems, we investigate in detail the transition between ... -
On the Distinctiveness of Noble Gases in Injected Co2 from Background Fluids
(SINTEF Proceedings;7, Chapter; Peer reviewed; Conference object, 2021)A comprehensive monitoring program for CO2 storage sites is an integral part of designing CCS projects. Once a CO2 anomaly is observed or suspected, the source of the CO2 may be identified through evaluation of geochemical ... -
On the effect of calcium lignosulfonate on the rheology and setting time of cement paste
(Journal article; Peer reviewed, 2017)The effect of softwood calcium lignosulfonate, LSs, on the rheology and setting time of cement paste has been investigated. Two Portland cements with different surface area and C3A content were used. The lignosulfonate was ... -
On the effect of co2 on seismic and ultrasonic properties: A novel shale experiment
(Peer reviewed; Journal article, 2021)Carbon capture and storage (CCS) by geological sequestration comprises a permeable formation (reservoir) for CO2 storage topped by an impermeable formation (caprock). Time-lapse (4D) seismic is used to map CO2 movement in ... -
On the effect of temperature and velocity relaxation in two-phase flow models
(Journal article; Peer reviewed, 2012)We study a two-phase pipe flow model with relaxation terms in the momentum and energy equations, driving the model towards dynamic and thermal equilibrium. These equilibrium states are characterized by the velocities and ... -
On the Feasibility of Using Low-Melting Bath to Accommodate Inert Anodes in Aluminium Electrolysis Cells
(Peer reviewed; Journal article, 2021)Inert anodes for aluminium production can be made of ceramics, metals, or a mixture of those (cermets). Regardless of the type of anode, the surface will be an oxide. With high enough anode potential, the surface oxide ... -
On the globally exponentially convergent immersion and invariance speed observer for mechanical systems
(Journal article; Peer reviewed, 2017)In this article we present a reformulation of the invariance and immersion speed observer of Astolfi et al. as applied to mechanical systems with bounded inertia matrices. This is done to explore the possibility of its ... -
On the mechanism of formation of back-end defects in the extrusion process
(Peer reviewed; Journal article, 2020)FEM-analysis is applied to study metal flow in aluminum extrusion with focus on how material flow defects form when the last part of the billet is extruded through an axisymmetric die. First, an overview is given of the ... -
On the mechanism of Mn(II)-doping in Scandia stabilized zirconia electrolytes
(Peer reviewed; Journal article, 2022)Cubic Scandia-stabilized zirconia (ScSZ) is an attractive electrolyte material for solid oxide cells due to its significant ionic conductivity, provided that the phase transition to its rhombohedral polymorph upon cooling ... -
On the mechanisms of consumption of calcium lignosulfonate by cement paste
(Journal article; Peer reviewed, 2017)The aim of this paper is to assess the mechanisms of consumption of softwood calcium lignosulfonate (LSs) by cement paste. The LSs consumption by two different cements (CX and ANL) and two reference materials (CaCO3 and ... -
On the microstructural origins of improvements in conductivity by heavy deformation and ageing of Al-Mg-Si alloy 6101
(Peer reviewed; Journal article, 2021)This work has examined an Al-0.54Mg-0.38Si (at.%) conductor alloy (6101) subjected to two different thermomechanical processing routes. Conventional solution treatment, quenching, and artificial ageing (170 °C) was compared ... -
On the numerical stability in dynamical distributed simulations
(Journal article; Peer reviewed, 2019-09)This work takes aim at studying numerical stability in distributed simulations through dynamic stabilityand stability criteria for explicit solvers. This is done by studying outer stability limits, for example stabilityconditions ...