Faculty of Science and Technology: Recent submissions
Now showing items 1541-1560 of 7365
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Numerical modelling of hydrodynamic responses of Ocean Farm 1 in waves and current and validation against model test measurements
(Peer reviewed; Journal article, 2021)With the continuous growing of the aquaculture industry and increasingly limited fish farming sites at close to shore areas both in Norway and worldwide, there is a need to develop fish farms suitable for aquaculture ... -
Response analysis of an offshore fish farm under combined waves and current.
(Master thesis, 2022)Global increasing demand for aquatic foods, limitations of sheltered water locations, and ecological concerns have led a movement towards expanding marine finfish aquaculture to exposed waters in the open ocean. Despite ... -
FAITH AND MOBILITY OF HYDROGEN IN GEOLOGICAL POROUS MEDIA
(Master thesis, 2022)Large-scale hydrogen storage can help alleviate the main drawbacks of renewable energy generation, their intermittency, and their seasonal and geographical constraints. Renewable energy without energy storage is unable to ... -
Optimization of LCM formulation for Wellbore Integrity
(Bachelor thesis, 2022)When drilling a conventional oil-gas well or geothermal well it is crucial to maintain well integrity. This is achieved by the preventing and containing fluid flow between the wellbore and the formation. Drilling fluid is ... -
Report on the 1st Simulation for Information Retrieval Workshop (Sim4IR 2021) at SIGIR 2021
(Journal article, 2021)Simulation is used as a low-cost and repeatable means of experimentation. As Information Retrieval (IR) researchers, we are no strangers to the idea of using simulation within our own field---such as the traditional means ... -
Exploratory Data Analysis of the N-CMAPSS Dataset for Prognostics
(Peer reviewed; Journal article, 2021)In the recent years, industries such as aeronautical, railway, and petroleum has transitioned from corrective/preventive maintenance to condition based maintenance (CBM). One of the enablers of CBM is Prognostics which ... -
A risk science perspective on the discussion concerning Safety I, Safety II and Safety III
(Peer reviewed; Journal article, 2021-09)Recently, there has been a discussion in the safety science community concerning the validity of basic approaches to safety, referred to as Safety I, Safety II and Safety III, with Erik Hollnagel and Nancy Leveson in leading ... -
A deterministic algorithm for nonlinear, fatigue-based structural health monitoring
(Peer reviewed; Journal article, 2021-10)The irregularity of peak and valley stress values of loading histories is the main impediment for accurate fatigue-based structural health monitoring. Since the available fatigue material data (e.g., S-N curves) have been ... -
Application of the quemada viscosity model for drilling fluids
(Chapter, 2021)A number of different models are used to describe the shear rate dependent viscosity of drilling fluids. Most, such as the Herschel-Bulkley model, have a purely empirical basis. The Quemada model, while still empirical, ... -
Petroleum Sector-Driven Roadmap for Future Hydrogen Economy
(Peer reviewed; Journal article, 2021)In the climate change mitigation context based on the blue hydrogen concept, a narrative frame is presented in this paper to build the argument for solving the energy trilemma, which is the possibility of job loss and ... -
Estimating the Competitive Storage Model with Stochastic Trends in Commodity Prices
(Peer reviewed; Journal article, 2021)We propose a State-Space Model (SSM) for commodity prices that combines the competitive storage model with a stochastic trend. This approach fits into the economic rationality of storage decisions and adds to previous ... -
Bruk av nettbrett til digitale innleveringer i fag med matematisk notasjon
(Peer reviewed; Journal article, 2021)MNT-fag har utstrakt bruk av matematisk notasjon og diagrammer. For øvingsoppgaver og eksamen i disse fagene blir det fortsatt overveiende brukt penn og papir. Samtidig er det et økende fokus på digitalisering. Digitale ... -
Environment-assisted fatigue of steel bridges: A conceptual framework for life assessment
(Peer reviewed; Journal article, 2021)This paper presents a framework based on a recently proposed fatigue strength curve of corroded steel to assess the life of an existing steel bridge exposed to environment-assisted fatigue. Environment-assisted cracking ... -
Wet-granular rheology to measure cuttings-bed strength
(Peer reviewed; Journal article, 2021)Drilled cuttings-bed formation is a natural process during wellbore drilling operations, although it is not desired. To optimally remove the drilled cuttings out of the wellbore it is important to break the formed beds. ... -
Probability elicitation using geostatistics in hydrocarbon exploration
(Peer reviewed; Journal article, 2021)The exploratory phase of a hydrocarbon field is a period when decision-supporting information is scarce while the drilling stakes are high. Each new prospect drilled brings more knowledge about the area and might reveal ... -
A 2D model for the study of equilibrium glide paths of UiS Subsea Freight-Glider
(Peer reviewed; Journal article, 2021)A planar mathematical model for the analysis of equilibrium glide paths of the UiS subsea freight-glider (USFG) is presented. The model is developed using Simscape Multibody in MATLAB/Simulink to study the ever-changing ... -
Bending-induced local buckling during offshore installation of multi-layered FRP pipelines
(Peer reviewed; Journal article, 2021)In the last two decades FRP pipelines have attracted the attention of the oil industry because of their high strength, excellent fatigue performance and low specific weight. On the other hand, the final cost of installation ... -
Tuning for robust and optimal dynamic positioning control in BlueROV2
(Peer reviewed; Journal article, 2021)A tuning approach for the robust and optimal dynamic positioning control of BlueROV2 subjected to currents with varying speeds and headings is presented. A 2D planar dynamic model of BlueROV2 is developed in Matlab/Simulink ... -
Predicting parton energy loss in small collision systems
(Peer reviewed; Journal article, 2021)Medium induced parton energy loss is not conclusively established either in very peripheral heavy-ion collisions or in proton-ion collisions. However, the standard interpretation of azimuthal momentum anisotropies in these ... -
Use of a transient model for studying kick migration velocities and build-up pressures in a closed well
(Chapter, 2021)The objective of the paper is to show that using pressure build-up curves for estimating kick migration velocities can be unreliable. This will be demonstrated by using a transient flow model where different flow patterns ...