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Investigation of glitches induced by single-crystal diamond compound refractive lenses based on crystal orientation
(Peer reviewed; Journal article, 2019)Single-crystal diamond is considered as an ideal material for compound refractive lenses (usually abbreviated to “CRLs”) mainly due to its stability when bathed in strong X-ray radiation. Since CRLs come into operation by ... -
Investigation of Influence of Adjustments in Cyclist Arm Position on Aerodynamic Drag Using Computational Fluid Dynamics
(Peer reviewed; Journal article, 2020-06)In professional cycling, even small adjustments in position could mean that valuable seconds are gained over the course of a time-trial race. This study investigates the influence of arm position on the aerodynamic drag ... -
Investigation of Lactam- Based Kinetic Hydrate Inhibitors and the Synergetic Effect of Solvents
(PhD thesis UiS;, Doctoral thesis, 2022)Gas hydrate formation in flow lines is of notorious concern for the oil and gas industry, and it only gets bigger because of the never-ending pursuit of oil and gas compels the industry into deeper and colder waters. Gas ... -
Investigation of Leakage Paths in Well Abandonment
(Masteroppgave/UIS-TN-IPT/2016;, Master thesis, 2016-06)A large number of wells will have to be abandoned at the NCS and around the world. NORSOK D-010 states that a well that is permanently abandoned shall be abandoned with an eternal perspective and with zero leakage [1]. ... -
Investigation of Material Property changes in HSLA Steel due to Weld Proximity
(Masteroppgave/UIS-TN-IMBM/2019;, Master thesis, 2019-09-15)Standards and specifications apply a rule of thumb when determining the distance of two adjacent weld joints, but they rarely give any clear technical justification for the predetermined values. It is vital to understand ... -
Investigation of materials which reduce CO2 in long term.
(Bachelor thesis, 2021)About one quarter of global energy use is for production of materials. The more efficient we are in the use of these materials, the better it is for the long-term reduction of CO2 and other GHG emissions. Concrete is the ... -
Investigation of mechanical properties of false banana/glass fiber reinforced hybrid composite materials
(Peer reviewed; Journal article, 2020)The objective of the work presented in this article is to investigate the mechanical properties of false banana/glass fiber reinforced hybrid composite materials at different fiber volume fractions and orientation of hybrid ... -
Investigation of mechanical property of aplite-based geopolymer for plug and abandonment
(Masteroppgave/UIS-TN-IPT/2016;, Master thesis, 2016-06)Historically and up to date, ordinary Portland cement (OPC) or a slight variation is the most widely used material for permanent Plug & Abandonment operation. However, there are several challenges related to cement usage. ... -
Investigation of necessary subsea structure modifications prior to installation of new offloading system at Gullfaks
(Masteroppgave/UIS-TN-IKM/2012;, Master thesis, 2012)Due to the extension of the Gullfaks license, Statoil needs to perform several upgrades to systems to satisfy today’s regulations. Today`s system consist of two large single point moored offloading buoys, SPM 1 and SPM ... -
Investigation of New Classes of Amide and Non-amide Kinetic Hydrate Inhibitors
(PhD thesis UiS;538, Doctoral thesis, 2020-09)The formation of gas hydrates can cause pipeline blockage during the transportation of gas and oil products, which is one of the main challenges for flow assurance in the petroleum industry. It is uneasy to remove gas ... -
Investigation of Ring-Openings of Some gem-Dichlorocyclopropanes
(Masteroppgave/UIS-TN-IKBM/2018;, Master thesis, 2018-06-29)The main purpose of this thesis was to study ring-openings of gem-dichlorocyclopropanes under basic conditions and the formation of acetylenic acetals. Therefore, several 2-alkoxy-1,1-dichlorocyclopropanes were synthesized ... -
Investigation of Rotor Efficiency with Varying Rotor Pitch Angle for a Coaxial Drone
(Peer reviewed; Journal article, 2022-04)Coaxial rotor systems are appealing for multirotor drones, as they increase thrust without increasing the vehicle’s footprint. However, the thrust of a coaxial rotor system is reduced compared to having the rotors in line. ... -
An Investigation of Second-Order Finite Volume Methods for Field-scale Reservoir Simulation
(PhD thesis UiS;, Doctoral thesis, 2024)This thesis focuses on improving the accuracy of numerical simulation of flow in subsurface reservoirs by using second-order finite volume methods. The first-order finite volume method, commonly used in reservoir simulation, ... -
Investigation of smoothing in the actuator line model for single and multi-rotor wind turbines
(Master thesis, 2022)The state-of-the-art actuator line modeling (ALM) method has been used extensively in the past decade to perform large-eddy simulations (LES) of wind turbines as fully resolved blade simulations require complex rotating ... -
Investigation of struvite crystallization within a fluidized bed reactor at IVAR SNJ Wastewater treatment plant
(Master thesis, 2023)This study investigates the struvite crystallization method for phosphorus recovery from IVAR SNJ wastewater treatment plant. The physicochemical properties of struvite, including its crystallization mechanics and the ... -
Investigation of suction anchor pullout capacity under undrained conditions
(Masteroppgave/UIS-TN-IKM/2015;, Master thesis, 2015-06-15)Floating units are dependent on reliable mooring systems to ensure safety during marine operations. Suction anchors have proved to be a technologically viable and cost-effective concept. They are capable of precision ... -
An Investigation of Sustained Casing Pressure Occurring on the NCS
(Masteroppgave/UIS-TN-IKM/2017;, Master thesis, 2017-12-15)Reports from the Gulf of Mexico (GoM) show that thousands of wells exhibit sustained casing pressure (SCP), however the extent of this phenomena and its driving factors have yet to be studied in detail on the Norwegian ... -
Investigation of temperature effects on cement bases for shallow gas zone cementing
(Bachelor thesis, 2021)Shallow gas can create challenges for well integrity, local and global environment. During drilling and completion of wells, shallow gas can create dangerous situations resulting to human, environmental and economic ... -
Investigation of temperature- and pressure effects on drilling fluid properties and related downhole torque and drag calculations
(Masteroppgave/UIS-TN-IPT/2016;, Master thesis, 2016-06)Increasing temperature and pressure with depth, affects the properties of drilling fluid. The effect of temperature and pressure on the density and viscosity of drilling fluid is of great importance. This is because, among ... -
Investigation of the Antiscaling Performance of Phosphonated Chitosan for Upstream Petroleum Industry Application
(Peer reviewed; Journal article, 2021)Scale deposition is one of the main water-based production problems in the upstream oil and gas industry. Few environmentally friendly scale inhibitors show good thermal stability as well as calcium compatibility. We report ...