Faculty of Science and Technology: Nye registreringer
Viser treff 1641-1660 av 7367
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Non-Amide Polymers as Kinetic Hydrate Inhibitors-Maleic Acid/ Alkyl Acrylate Copolymers and the Effect of pH on Performance
(Peer reviewed; Journal article, 2021)Kinetic hydrate inhibitors (KHIs) have been used for over 25 years to prevent gas hydrate formation in oil and gas production flow lines. The main component in KHI formulations is a water-soluble polymer with many amphiphilic ... -
The effect of laser surface melting on the retained austenite and wear properties of AISI D2 tool steel
(Peer reviewed; Journal article, 2021)In this study the effect of laser surface melting (LSM) on the amount of retained austenite, hardness and wear resistance of AISI D2 steel was investigated utilizing hardness test, X-ray diffraction (XRD), pin on disk wear ... -
Tuning the interfacial sites between copper and metal oxides (Zn, Zr, In) for CO2 hydrogenation to methanol
(Peer reviewed; Journal article, 2021)The influence of different metal oxides (ZnO, ZrO2, In2O3) in CO2 hydrogenation to methanol over Cu-based catalysts was studied. The catalysts were characterized using x-ray diffraction (XRD), thermal gravimetric analysis ... -
Green Synthesis, Characterization, Antimicrobial and Anticancer Screening of New Metal Complexes Incorporating Schiff Base
(Peer reviewed; Journal article, 2022)A Schiff base ligand of o-vanillin and 4-aminoazobenzene and its transition metal complexes of Ni(II), Co(II), Zn(II), Cu(II), Mn(II), and Zr(IV) were prepared under microwave irradiation as a green approach compared to ... -
Frequency-dependent AVO inversion applied to physically based models for seismic attenuation
(Peer reviewed; Journal article, 2022)Seismic inversion of amplitude versus offset (AVO) data in viscoelastic media can potentially provide high-resolution subsurface models of seismic velocities and attenuation from offset/angle seismic gathers. P- and S-wave ... -
Synthesis and Study of Modified Polyaspartic Acid Coupled Phosphonate and Sulfonate Moieties As Green Oilfield Scale Inhibitors
(Peer reviewed; Journal article, 2021)The petroleum industry has strived for several years to explore environmentally friendly scale inhibitors with no acute environmental impact. Well-known industrial biodegradable polyaspartic acid is widely used as a potent ... -
Transition metal single-atom supported on PC3 monolayer for highly efficient hydrogen evolution reaction by combined density functional theory and machine learning study
(Peer reviewed; Journal article, 2022)It is essential to develop non-precious metal-based alternatives used in hydrogen evolution reaction (HER) due to high cost and scarcity of Pt-based catalysts. Herein, through density functional theory (DFT) calculations, ... -
Survival through coping strategies for resilience following a ship accident in polar waters
(Peer reviewed; Journal article, 2021)On 19 June 1989, the cruise liner Maksim Gorkiy hit an ice floe southwest of Svalbard. The passengers and parts of her crew abandoned the ship. In a massive rescue operation 953 crew and passengers were rescued, in addition ... -
Fundamentals and physical principles for drilled cuttings transport – Cuttings bed sedimentation and erosion
(Peer reviewed; Journal article, 2021)The increasing necessity of challenging wellbore structures and drilling optimization for improved hole cuttings cleaning has been growing along time. As a result, operator companies have been researching and applying ... -
Intrinsic Strand-Incision Activity of Human UNG: Implications for Nick Generation in Immunoglobulin Gene Diversification
(Peer reviewed; Journal article, 2021)Uracil arises in cellular DNA by cytosine (C) deamination and erroneous replicative incorporation of deoxyuridine monophosphate opposite adenine. The former generates C → thymine transition mutations if uracil is not removed ... -
Synthesis and Antiscaling Evaluation of Novel Hydroxybisphosphonates for Oilfield Applications
(Peer reviewed; Journal article, 2021)Organophosphorous compounds are still widely used as potential scale inhibitors in the upstream oil and gas industry, particularly in squeeze treatments as they have good adsorption properties on rock and are easily ... -
Multiphysics Modeling and Numerical Simulation in Computer-Aided Manufacturing Processes
(Peer reviewed; Journal article, 2021)The concept of Industry 4.0 is defined as a common term for technology and the concept of new digital tools to optimize the manufacturing process. Within this framework of modular smart factories, cyber-physical systems ... -
FRP pipeline performance in tensional and torsional S-lay installation loads
(Peer reviewed; Journal article, 2021)The loading conditions of a composite pipeline is the main factor for its dimensioning. During S-lay offshore installation of multilayered FRP pipelines, severe tensional and torsional loads take place in the above sea ... -
On the optimization of actuator saturation limits for LTI systems: an LMI-based invariant ellipsoid approach
(Peer reviewed; Journal article, 2021)This paper considers the problem of optimal actuator dimensioning for LTI systems, in the sense of choosing appropriate saturation limits for a given set of admissible initial conditions and for a predefined integral ... -
A critical review on production, modification and utilization of biochar
(Peer reviewed; Journal article, 2021)There has been an increased interest in the production of sustainable biochar in the past years, as biochar shows versatile physicochemical properties and, can have a wide applicability in diverse fields. Comprehensive ... -
Influencing factors on petrography interpretations in provenance research – a case-study review
(Peer reviewed; Journal article, 2021)The use of framework petrography is a common initial step in provenance research of sand and sandstone. The data tend to be interpreted based on the three main components quartz, feldspar, and lithic fragments. Surprisingly ... -
On the numerical discretization of a tumor progression model driven by competing migration mechanisms
(Peer reviewed; Journal article, 2021)In this work we explore a recently proposed biphasic cell-fluid chemotaxis-Stokes model which is able to represent two competing cancer cell migration mechanisms reported from experimental studies. Both mechanisms depend ... -
Modeling of Heavy-Oil Flow with Regard to Their Rheological Properties
(Peer reviewed; Journal article, 2021)With the depletion of traditional energy resources, the share of heavy-oil production has been increasing recently. According to some estimates, their reserves account for 80% of the world’s oil resources. Costs for ... -
CO2 Dissolution and Convection in Oil at Realistic Reservoir Conditions: A Visualization Study.
(Peer reviewed; Journal article, 2021)CO2 convective mixing has been extensively studied for CO2 dissolution in saline water but very limited with the presence of oil. The objective of this work was to visually study the supercritical CO2 (sCO2) dissolution ... -
Mapping climate discourse to climate opinion: An approach for augmenting surveys with social media to enhance understandings of climate opinion in the United States
(Peer reviewed; Journal article, 2021)Surveys are commonly used to quantify public opinions of climate change and to inform sustainability policies. However, conducting large-scale population-based surveys is often a difficult task due to time and resource ...