Faculty of Science and Technology: Nye registreringer
Viser treff 1781-1800 av 7367
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Modelling of Waves for the Design of Offshore Structures
(Peer reviewed; Journal article, 2020)For the design of structures we need to select design safety levels to ensure structures shall safely operate and not collapse. These levels are given in relevant safety standards. For these levels we need to identify the ... -
Bayesian seismic inversion for stratigraphic horizon, lithology, and fluid prediction
(Peer reviewed; Journal article, 2020)We have developed an efficient methodology for Bayesian prediction of lithology and pore fluid, and layer-bounding horizons, in which we include and use spatial geologic prior knowledge such as vertical ordering of ... -
Amine functionalized metal-organic framework for carbon capture
(Bachelor thesis, 2022)This thesis was all about synthesizing metal-organic frameworks, MOFs, with different compositions, and further on characterize and analyze the products using different measurements. The idea was to find out how we could ... -
Effect of nanoparticles on properties of geopolymers designed for well cementing applications
(Peer reviewed; Journal article, 2020)Recently the focus of the oil and gas industry is to find the alternative material for well barrier applications. Geopolymers are among the suggested materials, which could be used in the future to solve the well integrity ... -
Evaluation of ballast failures during operations of semi-submersible rigs
(Peer reviewed; Journal article, 2019)Risk analysis/assessment is one of the challenges encountered during operations of offshore units on the Norwegian Continental Shelf (NCS). In recent years, the Petroleum Safety Authority (PSA) has focused on hazards ... -
A Relationship Between Breaking Wave Characteristics and Slamming Forces Acting on Jacket Structures
(Peer reviewed; Journal article, 2019)The goal of this study was to investigate and describe the relationship between breaking wave characteristics and total slamming forces acting on a jacket structure in shallow water, based on the experimental data collected ... -
Trends in seismic data acquisition in areas with surface ice
(Peer reviewed; Journal article, 2019)The Arctic has great significance in relation to the exploration and exploitation of its huge petroleum resources. Seismic surveys are the key part of petroleum exploration. Reflected sound waves are used to produce a 3D ... -
Order parameter dynamics of the non-linear sigma model in the large N limit
(Peer reviewed; Journal article, 2020)We study non-equilibrium order parameter dynamics of the non-linear sigma model in the large N limit, using Keldysh formalism. We provide a scheme for obtaining stable numerical solution of the Keldysh saddle point equations ... -
Risk assessment of wind farm development in ice proven area
(Peer reviewed; Journal article, 2019)There many risks associated with wind farms operating in cold harsh areas, a number of these risks is caused by icing. Atmospheric and super-structure icing can cause ice accretion on wind turbines’ structure, and lead to ... -
Experimental Investigation of the Mechanisms of Salt Precipitation during CO2 Injection in Sandstone
(Peer reviewed; Journal article, 2019)Deep saline reservoirs have the highest volumetric CO2 storage potential, but drying and salt precipitation during CO2 injection could severely impair CO2 injectivity. The physical mechanisms and impact of salt precipitation, ... -
Natural gas: A transition fuel for sustainable energy system transformation?
(Peer reviewed; Journal article, 2019)Current discourse on the transition to a decarbonized energy system future is dominated by renewable energy solutions. Initial conditions for this transition may vary across different regions and countries. There are, ... -
Effective fluid bulk modulus in the partially saturated rock and the amplitude dispersion effects
(Peer reviewed; Journal article, 2020)Frequency dispersion is a well-known effect in geophysics, which means that waves of different wavelengths propagate at different velocities. Amplitude dispersion is a less-known effect, which means that waves of different ... -
Assumptions in quantitative risk assessments: When explicit and when tacit?
(Peer reviewed; Journal article, 2020)In quantitative risk assessments, several explicit assumptions need to be made, to compute the risk metrics addressed. Such assumptions may, for example, relate to the number of people exposed to specific hazards, to the ... -
Heavy quarkonium in extreme conditions
(Peer reviewed; Journal article, 2020)In this report we review recent progress achieved in the understanding of heavy quarkonium under extreme conditions from a theory perspective. Its focus lies both on quarkonium properties in thermal equilibrium, as well ... -
Numerical investigation of the impacts of borehole breakouts on breakdown pressure
(Peer reviewed; Journal article, 2019)Borehole breakouts appear in drilling and production operations when rock subjected to in situ stress experiences shear failure. However, if a borehole breakout occurs, the boundary of the borehole is no longer circular ... -
Pipeline shore crossing approaches in Arctic conditions
(Peer reviewed; Journal article, 2019)The development of the Arctic region will entail the construction of new infrastructure, in particular, subsea pipelines. Considering the lack of actual field practice, ecosystem vulnerability and lack of common Arctic ... -
Chemical equilibration in hadronic collisions
(Peer reviewed; Journal article, 2019)We study chemical equilibration in out-of-equilibrium quark-gluon plasma using the first principles method of QCD effective kinetic theory, accurate at weak coupling. In longitudinally expanding systems—relevant for ... -
State-of-the-art of crack propagation modelling in tubular joints
(Peer reviewed; Journal article, 2019)Offshore structures are conventionally designed for a service life between 20-30 years and mostly used beyond their service life. They are operated up to the point where costs of operations, maintenance and repair exceed ... -
Reconstructing parton distribution functions from Ioffe time data: from Bayesian methods to Neural Networks
(Peer reviewed; Journal article, 2019)The computation of the parton distribution functions (PDF) or distribution amplitudes (DA) of hadrons from first principles lattice QCD constitutes a central open problem. In this study, we present and evaluate the efficiency ... -
Strength analysis of 3D printed carbon fibre reinforced thermoplastic using experimental and numerical methods
(Peer reviewed; Journal article, 2019)A study of strength of composite materials produced by 3D printing technology is presented. The samples fabrication and tests to determine the strength both in bending and in tension of the composite materials have been ...