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 1371 for “"Fibre"”.
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The Influence of Fibre Processing and Treatments on Hemp Fibre/Epoxy and Hemp Fibre/PLA Composites
… to the development and production of natural fibre reinforced polymer (both thermoset and thermoplastic) composites. The main objective of this study was to reinforce epoxy and polylactic acid (PLA) with hemp fibre to produce improved composites by optimising the fibre treatment methods, …
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Exploitation of fibre characteristics in temperature sensing and radio-over-fibre applications
… development of microelectronic sensors, optical fibre sensors are widely investigated because of their advantageous properties over the electronics sensors such as their wavelength multiplexing capability and high sensitivity to temperature, pressure, strain, vibration and acoustic emission. …
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Optical fibre nanowire devices
The Optical Fibre Nanowire (OFN) is a potential building block in future micro- and nano-photonic device since it offers a number of unique optical and mechanical properties. In this thesis, the background and fundamental features of nanowires are introduced; the theory, design and demonstration of …
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High-power fibre lasers
… rare-earth (Yb3+, Er3+/Yb3+)-doped fibre lasers. Some of the main capabilities of fibre lasers such as: High brightness and thermal properties were exploited for the development of a variety of continuous wave (CW) and Q-switched devices, whose characteristics also includes …
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The effect of chemical treatment, fibre length, fibre content and injection moulding parameters to uv irradiation resistance of oil palm fibre reinforced composites
… the composite material samples, while oil palm fibre as reinforcement. The effect of the fibre length, fibre content, fibre treatment, coupling agent and injection moulding parameter to ultraviolet (UV) light resistance of this composite and also the optimum setting of them were investigated. …
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Harakeke fibre as reinforcement in epoxy matrix composites and its hybridisation with hemp fibre
… and motivation in research to develop natural fibre composites to replace glass fibre composites in certain applications. Harakeke fibre known as New Zealand flax or Phormium tenax used to be an important export material in New Zealand in the early twentieth century, but its production reduced …
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Natural fibre reinforced cement composites
… necessitated in finding alternative resource of fibres. Over the last two decades natural fibre (mainly wood pulp fibre) has emerged as the most acceptable alternative reinforcement for fibre cement products. The first three chapters of this study describe in some depth the preparation and …
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Probabilistic Models on Fibre Bundles
… this thesis, we propose probabilistic models on fibre bundles for learning the generative process of data. The main tool we use is the diffusion kernel and we use it in two ways. First, we build from the diffusion kernel on a fibre bundle a projected kernel that generates robust representations …
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Interrogation of fibre optic sensors
… thesis was to investigate the interrogation of fibre optic sensors using "off the shelf optical components and equipment developed mainly for the telecommunications industry. This provides a cost effective way of bringing fibre optic sensor systems to within the price range of their …
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The use of loop mirrors and chirped fibre Bragg gratings in actively-modelocked fibre lasers
… hardware. This thesis presents several novel fibre lasers which are useful pulse sources for high speed optical data processing and communications. They share several attributes in common: flexibility, stability and low-jitter output. They all produce short (picosecond) and are suitable as …
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Characterisation of Glass Fibre Polypropylene and GFPP based Fibre Metal Laminates at high strain rates
Fibre reinforced polymers (FRP) are finding increasing use in structures subjected to high rate loading such as blast or impact. Proper design of such structures requires thorough characterisation of the material behaviour over a range of loading rates from quasi-static to impact. This thesis …
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Fibre optic sensor for speed measurement
… hazardous environments in which optical fibre sensors are more suited. In this thesis the development of a non-intrusive speed measurement sensor, based on optical technology is described. The optical fibre sensor described herein gives an almost instantaneous indication of the speed and …
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A fibre optic based ranging sensor
… environments, which may be satisfied by optical fibre based sensors. In this thesis the development of an optical ranging sensor, based on fibre optic technology, is described for range measurements over a few metres. Its operation requires an intensity modulated frequency-swept signal which is …
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Microscopic characterisation of fibre Bragg gratings
… study of microscopic characterization of optical fibres and fibre Bragg gratings, by the use of a non-invasive microscopic technique, namely differential interference contrast microscopy. The thesis aims to provide detailed information on the structural and optical properties of optical fibres and …
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The Fracture Toughness of Fibre Concretes
… a study of the general properties of plain and fibre-reinforced concrete has been carried out with particular emphasis on Mode II as well as Model failure. A numerical study of the test specimens used in the experimental work has been carried cut using constant strain triangular …
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Cladding-pumped Raman fibre laser sources
… this thesis, I investigate cladding-pumped Raman fibre lasers and amplifiers. Such devices, offering a novel way to generate Raman gain, combine the advantages of the hugely successful cladding-pumped rare-earth doped fibre lasers with those of stimulated Raman scattering. They not only inherit …
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Optical fibre sensors and their interrogation
… in the fabrication and understanding of type IA fibre Bragg gratings, the uses of said gratings as optical sensors and the interrogation of optical sensors using tilted fibre Bragg gratings. This thesis presents the most detailed study of type IA gratings performed to date and provides the basis …
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