Faculty of Science and Technology: Recent submissions
Now showing items 521-540 of 7322
-
Experimental and Numerical Study on the Slug Characteristics and Flow-Induced Vibration of a Subsea Rigid M-Shaped Jumper
(Peer reviewed; Journal article, 2023)The subsea jumper has become an essential part of subsea production systems as a gas–liquid mixing pipeline connecting the pipeline end manifold (PLEM) to the Christmas tree. During oil and gas transportation, as a common ... -
Resource Allocation in Networking and Computing Systems: A Security and Dependability Perspective
(Peer reviewed; Journal article, 2023)In recent years, there has been a trend to integrate networking and computing systems, whose management is getting increasingly complex. Resource allocation is one of the crucial aspects of managing such systems and is ... -
Gaidai-Xing reliability method validation for 10-MW floating wind turbines
(Peer reviewed; Journal article, 2023)In contrast to well-known bivariate statistical approach, which is known to properly forecast extreme response levels for two-dimensional systems, the research validates innovative structural reliability method, which is ... -
Application of Artificial Intelligence for Surface Roughness Prediction of Additively Manufactured Components
(Peer reviewed; Journal article, 2023)Additive manufacturing has gained significant popularity from a manufacturing perspective due to its potential for improving production efficiency. However, ensuring consistent product quality within predetermined equipment, ... -
Application of Anti-Sagging Polymer for Oil Based Drilling Fluid: Experimental and Simulation Studies.
(Master thesis, 2023)The phenomenon of barite sag presents a significant hurdle in the drilling sector, posing a threat to operational efficiency, causing potential damage to machinery, and contributing to possible environmental hazards. This ... -
Prostate Age Gap: An MRI Surrogate Marker of Aging for Prostate Cancer Detection
(Peer reviewed; Journal article, 2023)Background Aging is the most important risk factor for prostate cancer (PC). Imaging techniques can be useful to measure age-related changes associated with the transition to diverse pathological states. However, biomarkers ... -
Oil tanker under ice loadings
(Peer reviewed; Journal article, 2023)As a result of global warming, the area of the polar pack ice is diminishing, making merchant travel more practical. Even if Arctic ice thickness reduced in the summer, fractured ice is still presenting operational risks ... -
Novel methods for coupled prediction of extreme wind speeds and wave heights
(Peer reviewed; Journal article, 2023)Two novel methods are being outlined that, when combined, can be used for spatiotemporal analysis of wind speeds and wave heights, thus contributing to global climate studies. First, the authors provide a unique reliability ... -
Extending and improving current frameworks for risk management and decision-making: A new approach for incorporating dynamic aspects of risk and uncertainty
(Peer reviewed; Journal article, 2023)In recent decades, there has been a growing recognition of the importance of risk-informed decision-making, and the use of risk assessments to support decisions is a core principle in current frameworks and standards for ... -
Whirling dynamics of a drill-string with fluid–structure interaction
(Peer reviewed; Journal article, 2023)Fluid–structure interaction models for drill-string vibrations are often of reduced order. However, both the structure and the surrounding fluid are non-linear, which can lead to complex coupled dynamic. In this paper, a ... -
Design and Dynamic Analysis of a Novel Subsea Shuttle Tanker
(PhD thesis UiS;, Doctoral thesis, 2023)Underwater pipelines, tanker ships, and liquefied gas carriers have traditionally been employed to transport hydrocarbons between offshore oil and gas facilities and onshore locations. However, both methods come with ... -
A quantitative analysis on the management of interest rate risk during 2022, by selected companies on the Oslo Stock Exchange.
(Master thesis, 2023)The purpose of the dissertation has been to look at how the hikes in interest rates have affected the most traded companies on the Oslo Stock Exchange (OBX). This has been done in a purely quantitative manner through manual ... -
A new formulation of the surface charge/surface potential relationship in electrolytes with valence less than three
(Peer reviewed; Journal article, 2023)Surface complexation models (SCMs) based on Gouy-Chapman theory are often used to describe adsorption of ions onto mineral surfaces. To compensate for the buildup of charge at a solid surface, the composition of the electric ... -
Trends and advances in micro gas turbine technology for sustainable energy solutions: A detailed review
(Peer reviewed; Journal article, 2023)Micro Gas Turbines (MGT’s) have gained significant popularity in various energy systems due to their adaptability, low emissions, flexible structure, and ease of maintenance. Past two decades, Micro Gas Turbine (MGT) based ... -
The economic impact of decreased mortality and increased growth associated with preventing, replacing or improving current methods for delousing farmed Atlantic salmon in Norway
(Peer reviewed; Journal article, 2023)Impacts of salmon lice is a major concern for a sustainable production of farmed Atlantic salmon in Norway. Most treatment methods for removal of salmon lice have associated increased mortality and decreased growth in a ... -
Hepcidin analysis in pneumonia: Comparison of immunoassay and LC-MS/MS
(Peer reviewed; Journal article, 2023)Background The iron-regulatory hormone hepcidin is a promising biomarker to differentiate anaemia of inflammation from iron deficiency. Plasma hepcidin concentrations increase substantially during inflammation, and the ... -
Multi-functional Flow Assurance Chemicals: Corrosion and Kinetic Hydrate Inhibition from Maleic Anhydride:N-Vinyl Caprolactam Copolymers and Synergists
(Peer reviewed; Journal article, 2023)Water-based flow assurance issues include corrosion, scale, and gas hydrate formation. Chemical solutions to mitigate these issues usually require separate inhibitors, which sometimes can lead to compatibility difficulties. ... -
The effect of PVA microfiber reinforcement on the mechanical and rheological behavior of class G oil well cement pastes
(Peer reviewed; Journal article, 2023)During the life cycle of an oil well, the annular cement sheath will be exposed to load combinations that can result in failure. To enhance the structural integrity and ductility of the cement paste, and to improve the ... -
Making sense of nonsense : Integrated gradient-based input reduction to improve recall for check-worthy claim detection
(CEUR Workshop Proceedings;, Chapter, 2023)Analysing long text documents of political discourse to identify check-worthy claims (claim detection) is known to be an important task in automated fact-checking systems, as it saves the precious time of fact-checkers, ... -
Mitigating non-linear DAC glitches using dither in closed-loop nano-positioning applications
(American Control COnference (ACC);, Chapter, 2023)Digital-to-analog conversion is essential in digital signal processing applications, including closed-loop control schemes. Noise and distortion in digital-to-analog converters result in reduced performance for high-precision ...