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Symmetry and Equivalence in Teleparallel Gravity
(Peer reviewed; Journal article, 2020-07)In theories such as teleparallel gravity and its extensions, the frame basis replaces the metric tensor as the primary object of study. A choice of coordinate system, frame basis, and spin-connection must be made to obtain ... -
Symptom burden and self-management in persons with chronic obstructive pulmonary disease
(Journal article; Peer reviewed, 2018-01)Purpose: Self-management is crucial for effective COPD management. This study aimed at identifying associations between self-management and sociodemographic characteristics, clinical characteristics, and symptom burden in ... -
Symptoms of post-traumatic stress disorder among first aid providers
(Peer reviewed; Journal article, 2023-06)Background Every year, large numbers of individuals are present or provide first aid in situations involving out-of-hospital cardiac arrest, injuries, or suicides. Little is known about the impact of providing first aid ... -
Synergistic Gas Hydrate and Corrosion Inhibition Using Maleic Anhydride: N-Isopropylmethacrylamide Copolymer and Small Thiols
(Peer reviewed; Journal article, 2023)Kinetic gas hydrate inhibitors (KHIs) are often used in combination with film-forming corrosion inhibitors (CIs) in oilfield production flow lines. However, CIs can be antagonistic to KHI performance. In this study, maleic ... -
Synergy Effect Study of Poly(N-isoacrylamide) with Tetra Butyl Phosphonium Bromide on Methane Hydrate Formation
(Journal article, 2019)Natural gas hydrate plugging is one of the costly and challenging problems for the oil and gas industry, especially for subsea fields. One way to prevent gas hydrate formation at low cost is the use of low-dosage hydrate ... -
The synergy of bicycles and public transport: a systematic literature review
(Peer reviewed; Journal article, 2023)This study is a review of the existing literature on the topic of bike-transit combination. The aim is two-fold: (i) to identify factors that influence its successful uptake, and (ii) to discuss the potential of the ... -
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 ... -
Synthesis and characterization of fly ash and slag based geopolymer concrete
(Peer reviewed; Journal article, 2019)This paper presents the formulation and characterization of composite fly ash and slag based geopolymer concrete. Potassium hydroxide (KOH) and potassium silicate (K2SiO3) liquid alkaline activators were used in the ... -
Synthesis and Evaluation of the Tetracyclic Ring-System of Isocryptolepine and Regioiso-Mers for Antimalarial, Antiproliferative and Antimicrobial Activities
(Peer reviewed; Journal article, 2021-05)A series of novel quinoline-based tetracyclic ring-systems were synthesized and evaluated in vitro for their antiplasmodial, antiproliferative and antimicrobial activities. The novel hydroiodide salts 10 and 21 showed the ... -
Synthesis and Investigation of Polymers of 2‑Methacrylamido-caprolactam as Kinetic Hydrate Inhibitors
(Peer reviewed; Journal article, 2020-05)Poly(N-vinylcaprolactam) (PVCap) and related copolymers have been used as kinetic hydrate inhibitors (KHIs) for over 25 years to combat gas hydrate formation in oil and gas field production flow lines. The caprolactam ... -
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 ... -
Synthesis of an Alleged Byproduct Precursor in Iodixanol Preparation
(Peer reviewed; Journal article, 2018-07)N1,N3-Bis(2,3-dihydroxypropyl)-2,4,6-triiodo-5-(N-(oxiran-2-ylmethyl)acetamido)isophthalamide (1), the alleged precursor of several minor byproducts formed when the X-ray contrast agent iodixanol is synthesized from ... -
Synthesis of Phenacene−Helicene Hybrids by Directed Remote Metalation
(Peer reviewed; Journal article, 2020-08)Polycyclic aromatic hydrocarbons (PAHs) with six and seven rings were synthesized via directed metalation and cross-coupling of chrysenyl N,N-diethyl carboxamides with o-tolyl and methylnaphthalenyl derivatives. In the ... -
Synthesis of the Hexahydropyrrolo‐[3,2‐c]‐quinoline Core Structure and Strategies for Further Elaboration to Martinelline, Martinellic Acid, Incargranine B, and Seneciobipyrrolidine
(Peer reviewed; Journal article, 2021-01)Natural products are rich sources of interesting scaffolds possessing a plethora of biological activity. With the isolation of the martinella alkaloids in 1995, namely martinelline and martinellic acid, the pyrrolo[3,2‐c]quinoline ... -
Synthesis of trans-dihydronaphthalene-diol and evaluation of their use as standards for PAH metabolite analysis in fish bile by GC-MS
(Peer reviewed; Journal article, 2020-05)Phenols and trans-1,2-dihydro-1,2-diols are metabolites commonly formed in vivo in fish upon exposure to polycyclic aromatic hydrocarbons (PAHs). These metabolites are excreted via the bile and gas chromatography-mass ... -
Synthetic natural gas production from CO2 and renewable H2: Towards large-scale production of Ni–Fe alloy catalysts for commercialization
(Peer reviewed; Journal article, 2020-08)Synthetic natural gas (SNG) is one of the promising energy carriers for the excessive electricity generated from variable renewable energy sources. SNG production from renewable H2 and CO2 via catalytic CO2 methanation has ... -
System of Comprehensive Energy-Efficient Utilization of Associated Petroleum Gas with Reduced Carbon Footprint in the Field Conditions
(Peer reviewed; Journal article, 2020)This paper considers the issue of associated petroleum gas utilization during hydrocarbon production in remote petroleum fields. Due to the depletion of conventional oil and gas deposits around the globe, production shifts ... -
A System Perspective on Implementation and Usage of the Da Vinci Technology at a Large Norwegian Regional Hospital
(Peer reviewed; Journal article, 2023)The aim of this research paper is to identify advantages and barriers to implementation and usage of robotic-assisted surgery (RAS), specifically the Da Vinci robot, at a larger regional hospital in Norway and from a ... -
A system-based approach to expert assessment work - exploring experiences among professionals in the Norwegian Educational Psychological Service and schools
(Peer reviewed; Journal article, 2020)ABSTRACT The focus of this Q methodological study was to explore how professionals in the Educational Psychological Service (EPS) and schools experienced a system-based approach to expert assessment work. Forty informants ... -
A systematic literature review on cyberstalking : An analysis of past achievements and future promises
(Peer reviewed; Journal article, 2020)Individuals’ excessive use of technology-enabled communication platforms, such as social media, has led to scholarly recognition of rising incidences of cyberstalking. Despite considerable studies directed at its examination, ...