Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 157 for “"North Sea"”.
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Testing incremental politics : the case of North Sea oil
… the quest to secure the much vaunted benefits of North Sea oil, highly non-incremental technologies have been adopted. Nowhere is this more the case than with the early fields of the central and northern North Sea. By focusing on the inflexible nature of North Sea hardware, in such fields, this …
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Geochemical tracers in the deep-sea and the North Sea
… about the inorganic geochemistry of the deep-sea and the North Sea, which have been published or submitted for publication. Typical element/Al ratios indicate eolian, continental input of loess material during the last Heinrich-events. In the Arabian Sea, the climatic influence on the …
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Estuaries as Sources of Methylated Arsenic to the North Sea
… Humber Estuary, Thames Estuary and the southern North Sea. Dissolved inorganic As in the Humber Estuary showed removal in the mouth of the estuary in association with an Fe-rich outfall. Intertidal sediments and suspended particles had elevated inorganic As concentrations in the vicinity of the …
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Trace Metal-Particle Water Interactions in the Western North Sea
… from the nearshore coastal zone of the western North Sea (between 52ON and 56ON) during four Land Ocean Interaction Study (LOIS) surveys covering the seasonal cycle (autumn 1994 to summer 1995) The behaviour of the redox-sensitive metals, Fep and Mnp in the western North Sea were strongly …
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Investigation of wellbore stability in a North Sea field development
… selecting mud density. The motivation for this research was to conduct wellbore stability based on exploration wells as basis for planning new offshore field developments with deviated and horizontal wells. A second objective was to investigate the use of a probabilistic approach to wellbore …
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Optimising the decommissioning of pipeline protection structures in the North Sea
… are used to protect and support pipelines on the seabed. The OSPAR 98/3 decision to ban offshore disposal of decommissioned installations does not cover pipeline protection structures, although current UK guidelines state that pipeline protection structures should be removed and disposed of …
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Kimmeridgian and Volgian fault-margin sedimentation in the Northern North Sea area
… the T-Block in the south to East Brae in the north and each of these fed a submarine fan system. The reservoir sequences will tend to be vertically stacked and spatially restricted in proximal areas and will become less stacked and less restricted distally. Stratigraphically trapped …
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Modelling the sustainability of overwintering Mnemiopsis leidyi populations in the North Sea
… its explosive population growth in the Black Sea - following accidental introduction via ballast water - coincided with a drastic reduction in the stock of the anchovy Engraulis encrasicolus in the region. M. leidyi has since been found in the coastal waters of many European countries and is a …
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Industrial relations in the North Sea oil and gas industry 1965-1995.
… produce an identical product. The scopeo f the researche ncompassesth e relationships of the trade unions and the offshore companies, both Norwegian and British, where they concern employment and related matters such as accident prevention and those interventions which govermnents have made in …
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The Quaternary geological evolution of the Belgian Continental Shelf, southern North Sea
… estuarine infilling during the Eemian sea-level rise. After the final phase, shoreface erosion was that severe, that seismic unit U3 was completely levelled with the Top-Paleogene surface, and Eemian remnants are only found in depressions. During the subsequent Weichselian lowstand, a …
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FLOW CYTOMETRIC INVESTIGATION OF THE SIZE SPECTRUM OF NORTH SEA PHYTOPLANKTON COMMUNITIES
… the loss of carbon from surface waters. Current North Sea monitoring and research programmes typically only consider larger micro- and nanoplankton cells, or the bulk phytoplankton community as a whole: there is little separation by functional type. Inclusion of picoplankton and the delineation …
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UK fisheries, climate change and North Sea fishes: a long-term perspective
Abstract North Sea demersal fishes and fisheries have changed over the past 100 years. To detect the main factors driving these changes, long-term data are needed. Using historical fisheries data that extend throughout the 20th century, this thesis aims to assess drivers influencing developments in …
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Subsidence, compaction, and thermal history of sediments in the northern North Sea
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1982.
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Bioreactor Janssand : fermentation processes in tidal-flat sediments of the German North Sea
Der anaerobe Abbau organischen Materials in Wattsedimenten umfasst mehrere Schritte. Der Fokus dieser Studie liegt auf den einleitenden Fermentationsprozessen. Im Rahmen dieser Arbeit wurde ein neuer experimenteller Ansatz entwickelt, bei dem Mikrokalorimetrie zur Ermittlung verschiedener …
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Managing labour under extreme risk: collective bargaining in the North Sea Oil industry.
… the young, turbulent and high risk industry of North Sea oil extraction. To explain this, the study had to extend beyond the more usual focus of research attention, the inmediate relationship between employer and employee, to examine the wider commercial relationship between the major oil …
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Artificial reef creation using decommissioned pipeline protection structures - environmental performance in the North Sea.
An increasing number of subsea oil and gas (O&G) pipelines in the North Sea (NS) require decommissioning. Protection structures are installed over pipelines to safeguard them from damage, these include the placement of concrete blocks linked together with polypropylene rope (“concrete mattresses”). …
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Deep learning methods for shear log predictions in the Volve field Norwegian North Sea
… data from the Volve field, in the Norwegian North Sea. In this thesis I use deep neural networks or feedforward neural networks, and I propose convolutional neural networks and recurrent neural networks, to predict shear logs from gamma ray, bulk density, neutron porosity, true formation …
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Sulfate reduction and iron-manganese cycling in intertidal surface sediments of the southern North Sea
Zielsetzung der vorliegenden Dissertation ist die Erfassung der Dynamik der Mangan-, Eisen- und Schwefel-Kreisläufe in unterschiedlichen intertidalen Sedimenten. Saisonale biogeochemische Untersuchungen in Sand-, Misch-, und Schlickwatt-Sedimenten der Nordseeinsel Spiekeroog geben Aufschluss über …
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