Alistair Duffy

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Purpose. A knowledge of the interfacial properties of lecithin underpins our understanding of many of the physicochemical characteristics of drug delivery systems such as liposomes and lecithin stabilized microemulsions. In order to further this understanding, a high frequency dielectric study of the interfacial properties of egg lecithin liposomes was(More)
Accurate forecasting of fresh produce demand is one the challenges faced by Small Medium Enterprise (SME) wholesalers. This paper is an attempt to understand the cause for the high level of variability such as weather, holidays etc., in demand of SME wholesalers. Therefore, understanding the significance of unidentified factors may improve the forecasting(More)
In this paper, the Transmission Line Matrix (TLM) method is used to study the electro-thermal performance degradation in RF LDMOS (Radio Frequency - Laterally Diffused Metal Oxide Semiconductor) transistors, through Thermal Cycling Test (TCT), as the temperature is a crucial parameter in RF devices. A hybrid approach is presented, which combines the(More)
Modelling of back reflection in silicon ring resonators is presented, together with a simulation to extract the values of reflection coefficients. Back reflection in ring resonators is induced by the sidewall roughness of silicon waveguides and is the main cause of response splitting at resonance. Calculation of the ring resonator frequency response without(More)
Broadcasting is used in on-demand routing protocols to discover routes in Mobile Ad-hoc Networks (MANETs). On-demand routing protocols, such as AODV (Ad-hoc On-demand Distance Vector) routing, commonly employ pure flooding based broadcasting. However, pure flooding generates excessively redundant routing traffic that may lead to broadcast storm problem(More)
Partial discharge is the phenomenon where high field strength causes charge build up and subsequent discharge within the body of the dielectric a power transmission line. Such a discharge is likely to occur at sites of imperfections, gas bubbles and other inhomogeneities. These can be the cause of serious deterioration in the dielectric which can lead to(More)
The development and testing of automotive (sub)systems, particularly for Electromagnetic Compatibility (EMC) usually requires expensive test facilities. This paper describes the use of electromagnetic simulation to demonstrate the level of confidence that can be placed in measurements taken in more general laboratories, thus giving an estimate of the(More)