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Design and analysis of current stress minimalisation controllers in multi-active bridge DC-DC converters. (2020)
Thesis
HEBALA, O.M. 2020. Design and analysis of current stress minimalisation controllers in multi-active bridge DC-DC converters. Robert Gordon University [online], PhD thesis. Available from: https://openair.rgu.ac.uk

Multi active bridge (MAB) DC-DC converters have attracted significant research attention in power conversion applications within DC microgrids, medium voltage DC and high voltage DC transmission systems. This is encouraged by MAB's several functional... Read More about Design and analysis of current stress minimalisation controllers in multi-active bridge DC-DC converters..

A holistic approach to assessment of value of information (VOI) with fuzzy data and decision criteria. [Thesis] (2019)
Thesis
VILELA IBARRA, M.J. 2019. A holistic approach to assessment of value of information (VOI) with fuzzy data and decision criteria. Robert Gordon University [online], PhD thesis. Available from: https://openair.rgu.ac.uk

The research presented in this thesis integrates theories and techniques from statistical analysis and artificial intelligence, to develop a more coherent, robust and complete methodology for assessing the value of acquiring new information in the co... Read More about A holistic approach to assessment of value of information (VOI) with fuzzy data and decision criteria. [Thesis].

Algorithms and methods for video transcoding. (2019)
Thesis
NAGARAGHATTA, A.S. 2019. Algorithms and methods for video transcoding. Robert Gordon University [online], PhD thesis. Available from: https://openair.rgu.ac.uk

Video transcoding is the process of dynamic video adaptation. Dynamic video adaptation can be defined as the process of converting video from one format to another, changing the bit rate, frame rate or resolution of the encoded video, which is mainly... Read More about Algorithms and methods for video transcoding..

Petrophysical and geomechanical characterization of a marginal (Wabi) field reservoir in north-central Niger Delta. (2019)
Thesis
ZORASI, C.B. 2019. Petrophysical and geomechanical characterization of a marginal (Wabi) field reservoir in north-central Niger Delta. Robert Gordon University [online], MRes thesis. Available from: https://openair.rgu.ac.uk

The aim of this study is to evaluate marginal field petrophysical and geomechanical parameters, and to develop a model for analysis of geomechanical problems, in order to mitigate stress-related issues in drilling, development and reservoir managemen... Read More about Petrophysical and geomechanical characterization of a marginal (Wabi) field reservoir in north-central Niger Delta..

Investigations towards the development of a novel multimodal fibre optic sensor for oil and gas applications. (2019)
Thesis
JOHNY, J. 2019. Investigations towards the development of a novel multimodal fibre optic sensor for oil and gas applications. Robert Gordon University [online], PhD thesis. Available from: https://openair.rgu.ac.uk

Oil and gas (O&G) explorations are moving into deeper zones of earth, causing serious safety concerns. Hence, sensing of critical multiple parameters like high pressure, high temperature (HPHT), chemicals, etc., are required at longer distances. Trad... Read More about Investigations towards the development of a novel multimodal fibre optic sensor for oil and gas applications..

Development of a novel photocatalytic reactor for the treatment of polycyclic aromatic hydrocarbons. (2019)
Thesis
GBADAMOSI, T.G. 2019. Development of a novel photocatalytic reactor for the treatment of polycyclic aromatic hydrocarbon. Robert Gordon University [online], PhD thesis. Available from: https://openair.rgu.ac.uk

Water pollution through the discharge of contaminated water into the environment has been a major problem, both to humans and aquatic life. These potential consequences mean that water pollution has therefore received major attention. In industry, a... Read More about Development of a novel photocatalytic reactor for the treatment of polycyclic aromatic hydrocarbons..

Structural and residual strength analysis of metal-to-metal adhesively bonded joints. (2019)
Thesis
PRATHURU, A. 2019. Structural and residual strength analysis of metal-to-metal adhesively bonded joints. Robert Gordon University [online], PhD thesis. Available from: https://openair.rgu.ac.uk

The aim of this study is to propose a new simulation/experimental methodology to assess the residual strength of defective adhesive bonds. This incorporates defect detection in adhesive bonds and quantification of the effect of these defects on the a... Read More about Structural and residual strength analysis of metal-to-metal adhesively bonded joints..

Sustainable treatment of oil contaminated waste: oil-based mud (OBM) drill cuttings and soil. (2018)
Thesis
NWINEE, S.A. 2018. Sustainable treatment of oil contaminated waste: oil-based mud (OBM) drill cuttings and soil. Robert Gordon University, PhD thesis.

Environmental pollution from oilfield drilling waste poses potential hazards which can lead to ecological imbalance. The predominant pollutant from oilfield waste is petroleum hydrocarbons. Some effects of petroleum hydrocarbon contamination in soil... Read More about Sustainable treatment of oil contaminated waste: oil-based mud (OBM) drill cuttings and soil..

Chemical and physical effects of interaction between oilfield chemicals and formation rocks and integration with sand failure prediction models. (2018)
Thesis
WUYEP, E.O. 2018. Chemical and physical effects of interaction between oilfield chemicals and formation rocks and integration with sand failure prediction models. Robert Gordon University [online], PhD thesis. Available from: https://openair.rgu.ac.uk

Sand failure may result in the production of formation sand at the same time the formation fluids are being produced. Sand failure occurs when the formation stress exceeds the strength of the formation, which is derived mainly from the natural materi... Read More about Chemical and physical effects of interaction between oilfield chemicals and formation rocks and integration with sand failure prediction models..

Design and testing of an integrated catalytic membrane reactor for deoxygenating water using hydrogen for down-hole injection and process applications. (2018)
Thesis
ORAKWE, I.R. 2018. Design and testing of an integrated catalytic membrane reactor for deoxygenating water using hydrogen for down-hole injection and process applications. Robert Gordon University, PhD thesis.

Water obtained from the sea contains dissolved oxygen (DO) and is considered to be undesirable for use in down-hole water injection or other process applications. The presence of DO leads to corrosion and other related problems and hence the need for... Read More about Design and testing of an integrated catalytic membrane reactor for deoxygenating water using hydrogen for down-hole injection and process applications..

Optical fibre-based minimally-invasive blood glucose monitoring system. (2018)
Thesis
VISWAMBARAN, V. 2018. Optical fibre-based minimally-invasive blood glucose monitoring system. Robert Gordon University [online], MRes thesis. Available from: https://openair.rgu.ac.uk

Obesity and changing lifestyles have made diabetes mellitus one of the world’s foremost metabolic syndromes, affecting the lives of around 380 million people worldwide. Although considered incurable, adverse effects of diabetes can be controlled by t... Read More about Optical fibre-based minimally-invasive blood glucose monitoring system..

Innovative hydrocarbons recovery and utilization technology using reactor-separation membranes for off-gases emission during crude oil shuttle tanker transportation and natural gas processing. (2018)
Thesis
SHEHU, H. 2018. Innovative hydrocarbons recovery and utilization technology using reactor-separation membranes for off-gases emission during crude oil shuttle tanker transportation and natural gas processing. Robert Gordon University, PhD thesis.

The increase in greenhouse gas (GHG) concentrations in the atmosphere, as well as the high rate of depletion of hydrocarbon-based resources have become a global concern. A major source of emissions of hydrocarbon vapours occur during loading and offl... Read More about Innovative hydrocarbons recovery and utilization technology using reactor-separation membranes for off-gases emission during crude oil shuttle tanker transportation and natural gas processing..

Optimization of indentification of particle impacts using acoustic emission. (2018)
Thesis
HEDAYETULLAH, A.M. 2018. Optimization of indentification of particle impacts using acoustic emission. Robert Gordon University, PhD thesis.

Air-borne or liquid-laden solid particle transport is a common phenomenon in various industrial applications. Solid particles transported at severe operating conditions such as high-flow velocity can cause concerns for structural integrity, through w... Read More about Optimization of indentification of particle impacts using acoustic emission..

Preparation, characterization and carrier gas transport characteristics of inorganic and organic membranes for application in lactic acid esterification with ethanol. (2018)
Thesis
OKON, E.P. 2018. Preparation, characterization and carrier gas transport characteristics of inorganic and organic membranes for application in lactic acid esterification with ethanol. Robert Gordon University, PhD thesis.

Ethyl lactate (EL) plays a major role as green solvent and also a replacement for most petrochemical solvents. The esterification process of lactic acid and ethanol to produce EL is an equilibrium-limiting reaction and the selective removal of one of... Read More about Preparation, characterization and carrier gas transport characteristics of inorganic and organic membranes for application in lactic acid esterification with ethanol..

Cross sensitivity analysis of optical fibre-based sensing for high pressure, high temperature measurement in oil and gas applications. (2018)
Thesis
AMOS, S.U. 2018. Cross sensitivity analysis of optical fibre-based sensing for high pressure, high temperature measurement in oil and gas applications. Robert Gordon University, PhD thesis.

Measurements of physical parameters like pressure, temperature, flow rate, vibrations and displacement in harsh environment are often desired in the oil and gas industry. Pressure and temperature are the most important parameters among them. Changes... Read More about Cross sensitivity analysis of optical fibre-based sensing for high pressure, high temperature measurement in oil and gas applications..

Computational fluid dynamics modelling of pipeline on-bottom stability. (2017)
Thesis
IYALLA, I. 2017. Computational fluid dynamics modelling of pipeline on-bottom stability. Robert Gordon University, PhD thesis.

Subsea pipelines are subjected to wave and steady current loads which cause pipeline stability problems. Current knowledge and understanding on the pipeline on-bottom stability is based on the research programmes from the 1980s such as the Pipeline S... Read More about Computational fluid dynamics modelling of pipeline on-bottom stability..

Accurate AVO modelling and reservoir characterisation of the upper cretaceous deepwater reservoirs in the Vøring Basin. (2017)
Thesis
CHALMERS, B. 2017. Accurate AVO modelling and reservoir characterisation of the upper cretaceous deepwater reservoirs in the Vøring Basin. Robert Gordon University, MPhil thesis.

In an exploration setting, reservoir characterisation is concerned with the identification of fluids and lithology. Seismic interpreters seek to distinguish hydrocarbons from brine and sand from shale. Amplitude vs offset (AVO) is a fundamental techn... Read More about Accurate AVO modelling and reservoir characterisation of the upper cretaceous deepwater reservoirs in the Vøring Basin..

A critical evaluation of the prospects for a transition towards ocean based renewable energy development in Nigeria. (2017)
Thesis
OSU, V.R. 2017. A critical evaluation of the prospects for a transition towards ocean based renewable energy development in Nigeria. Robert Gordon University, PhD thesis.

The move towards addressing two pertinent energy challenges that is access to electricity and climate change has seen the transition towards sustainable forms of energy including Ocean Based Renewable Energy (OBRE). However, much work remains to be d... Read More about A critical evaluation of the prospects for a transition towards ocean based renewable energy development in Nigeria..

Gas-condensate flow modelling for shale gas reservoirs. (2016)
Thesis
LABED, I. 2016. Gas-condensate flow modelling for shale gas reservoirs. Robert Gordon University, PhD thesis.

In the last decade, shale reservoirs emerged as one of the fast growing hydrocarbon resources in the world unlocking vast reserves and reshaping the landscape of the oil and gas global market. Gas-condensate reservoirs represent an important part of... Read More about Gas-condensate flow modelling for shale gas reservoirs..