This thesis contributes to the discussion around the practice of co-design with children by providing support for reflections to practitioners. The framework that derived from this research aims to increase the awareness on the implications the different aspects involved on co-d…
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Active Screen Plasma Nitriding (ASPN) is a novel surface engineering technique, the main advantage of which is the capacity to treat homogeneously all kind of materials surfaces of any shape. Here, ASPN is used to modify the surface properties of ionomer glasses and polymers in …
Research has been undertaken to develop new yttria slurry systems for use in mould face coats for investment casting TiAl alloy, solving the pre-gelation problems of commercial yttria slurry systems to increase slurry life. Meanwhile, the new face coats should also have excellen…
Since the end of last century, power systems are more often operating under highly stressed and unpredictable conditions because of not only the market-oriented reform but also the rising of renewable generation and electric vehicles. The uncertain factors resulting from these c…
An attractive alternative to ineffective and inefficient biocide dosing strategies for seawater piping systems would be to monitor, quantitatively evaluate and then induce biofilm disruption when necessary using an environmentally friendly biocide. The aim of the present Ostl an…
Supercritical carbon dioxide (SC-CO\(_2\)) and Soxhlet extraction using hexane as solvent were used to extract 2-acetyl-1-pyrroline (2-AP) from Pandan leaves. The effect of different extraction pre-treatments, such as particle size and drying on the extraction yield and concentr…
Electron transfer is a key part of many chemical, biological and physical processes, that is commonly studied by electrochemical methods, which give insight into reaction mechanisms but no structural information. It is necessary to combine electroanalysis with another technique …
Passive porous coatings have been proposed in literature as a means of delaying transition to turbulence in hypersonic boundary layers. The nonlinear stability of hypersonic viscous flow over a sharp slender cone with passive porous walls is investigated in this study. Hypersoni…
Traditional computational and experimental assessments of implant performance are determin- istic; each computational (usually finite element (FE) based) simulation or experiment describes a single situation. While useful information can be gained from these analyses, when the n…
This thesis presents an investigation of a computational model of hierarchical visual behaviours within an active binocular robot vision architecture. The robot vision system is able to localise multiple instances of the same object class, while simultaneously maintaining vergen…
This thesis reports on Semiconductor Optical Amplifiers (SOAs) and their use in optical communication systems; in particular improving the reach of Passive Optical Networks (PON). Following a comprehensive overview of the components of optical communication systems a PON is intr…
This thesis will describes how microfabrication techniques can be combined with Atomic Force Microscopy (AFM) to investigate the potential for cellular elasticity to be used as an indicator of cell behaviour and responses to chemical and topographical surface modifications. To t…
The rise of photonic integration makes optical code division multiple access (OCDMA) worth revisiting due to its promising role in future all-optical networks. OCDMA has the potential to exploit the surplus bandwidth of optical fibres and to carry over to the optical domain the …
Managing technological change in business is difficult. Especially for organisations in technology-based sectors where they are required to rethink and redesign their strategies to ensure they remain competitive in evolving markets. These organisations are focusing their attenti…
This study explores the usage of linear programming (LP) as a tool to optimise the parameters of time series forecasting models. LP is the most well-known tool in the field of operational research and it has been used for a wide range of optimisation problems. Nonetheless, there…
Verification of access control systems against vulnerabilities has always been a challenging problem in the world of computer security. The complication of security policies in large- scale multi-agent systems increases the possible existence of vulnerabilities as a result of mi…
This thesis describes the research on the use of non-linear formant trajectories to model speech dynamics under the framework of a multiple-level segmental hidden Markov model (MSHMM). The particular type of intermediate-layer model investigated in this study is based on the 12-…
The sensitivity of the next generation of interferometric gravitational wave detectors will be limited in part by thermal noises of the optics. It has been proposed that using higher-order Laguerre-Gauss (LG) beams in the interferometers can reduce this noise. This thesis docume…
The development of a statistical compact model strategy for nano-scale CMOS transistors is presented in this thesis. Statistical variability which arises from the discreteness of charge and granularity of matter plays an important role in scaling of nano CMOS transistors especia…