Investigating strain transfer in polymer coated structures for the health monitoring of aerospace vehicles using polymer photonic waveguides

In this work, we present the concept of planar polymer photonic waveguides for the health monitoring of aerospace structures. Here a polymer layer is deposited onto the material/structure to be monitored. Within the polymer layer, waveguides are created after deposition. These waveguides can then be used as 'optical fibres' for optical fibre sensing methodologies. In investigating the use of polymer photonic waveguides the question to be answered is: does the strain in the test material transfer to the polymer layer, such that the value to be measured optically is reliable and indicative of the true strain in the test structure? To answer this question we have conducted a preliminary structural analysis with finite element analysis, utilising ANSYS. A simple aluminium cantilever was used as the test structure, and layers of polyethylene with different thicknesses were added to this. Result show that the thinner the layer of polymer, the more accurate the measured strain will be. For a 100um coating, the difference is strain was observed to be on the order of 3.3%. © 2014 IEEE.

Nanostructured liquid crystalline particles as next generation agrochemical delivery vehicles

A new system for delivering agrichemicals to crop plants was investigated. Nano-structured lipid particles were used as an alternative to traditional surfactants for penetrating plant surfaces. In laboratory and field trials the nanoparticles delivered chemicals effectively, caused less damage to plants, required less water and resulted in lower environmental impacts.

The effect of victim age on police authorisation of charges in cases of child sexual abuse

In the study, a cohort of 440 child sexual abuse cases were used to model the effect of victim age on police authorisation of charges. Linear and quadratic effects of age were modelled in a logistic regression that controlled for case characteristics and evidence. The quadratic effect of victim age was strengthened when control variables were included in the model and the linear effect of age was not significant in the final model. The results indicated that cases involving victims in middle childhood had a higher proportion of suspects charged than cases involving victims in early childhood and adolescence. Possible mediators of the relationship between victim age and charges were explored and it was found that cases with older victims had a higher prevalence of extra-familial abuse and suspect confessions, and these factors had a positive effect on the proportion of suspects charged. Possible explanations for the quadratic effect of victim age and mediation are discussed.

Adaptive robust control of 6-DOF autonomous aerial vehicles

The thesis focused on development of an auto-pilot system for UAV’s and small fixed wing aircraft for use in hazardous flight conditions, such as severe weather. This led to development of a mathematical algorithm that unbinds the flight systems from coupling effects which can adaptively changed to the environment.

Simmel, the police form and the limits of democratic policing

© 2015 The Author. I argue that the social theory of Georg Simmel can be used to illustrate certain limitations to the potential of democratic policing. Simmel makes a number of claims about trust, secrecy and accountability that are shown to have immediate relevance to my empirical case study of police-public consultation forums in Edinburgh, Scotland. Two particular aspects of the 'form' of the police-public relationship-the police's command of non-negotiable force and inequality in the reciprocity of information-play a key role in limiting some of the principal aspirations of democratic policing theory. There are permanent barriers to improving the democratic credentials of the police I argue, yet positive and progressive change is still achievable.

Police legitimacy, ideology and qualitative methods: a critique of procedural justice theory

I argue that there are unconsidered complexities to police legitimacy and use examples from my study of police–public consultation forums in Edinburgh, Scotland to illustrate. I make a number of conceptual and methodological critiques by drawing upon Steven Lukes’ social theory on power to show how legitimacy can be a product of authority relations as much as it is a cause of authority relations. This view finds support from systems-justification theory. I also tackle Beetham’s conception of legitimacy and argue that there is evidence from police studies that the police breach his key antecedents to legitimacy without incurring the expected consequences. Furthermore, I take an original methodological approach to studying police legitimacy which reveals additional insights. For instance, Bottoms and Tankebe suggest legitimacy addresses multiple ‘audiences’; I would also add that it addresses multiple recipients as legitimacy is shown to vary among officers and positions of rank.

Victoria’s banning provisions: ‘balancing’ discretionary police powers and individual rights

This thesis examines the parliamentary passage, implementation and ongoing scrutiny of Victoria’s banning notice provisions. Underlying political assumptions and justifications are explored to reveal how banning notices exemplify a move towards police-imposed discretionary justice, which undermines individual rights and reconfigures the notion of balance in the criminal justice system.

A new perspective of storm bite on sandy beaches using unmanned aerial vehicles

Aerial imagery collected before and after major storm events is ideal for the assessment of coastal landscape change driven by individual high-magnitude events. Using traditional satellite sensors and manned aerial systems can be challenging due to issues related to cloud cover, mobilization expenses and resolution. Rapid advances in unmanned aerial vehicle (UAV) technology allow for the cost-effective collection of aerial imagery and topography at centimetre resolution suitable for assessing change in coastal ecosystems. In this study we demonstrate the utility of UAV-based photogrammetry to quantify storm-driven sediment dynamics on a sandy beach on the open-coast shoreline of Victoria, Australia. UAV-based aerial photography was collected before and after a major storm event. High-resolution (< 5 cm) aerial imagery and digital surface models were acquired and change-detection techniques were applied to quantify changes in the beachface. An average beach erosion of 12.24 m3/m with a maximum of 28.05 m3/m was observed, and the volume of sand cut from the beachface and retreat of the foredune are clearly illustrated. Following the storm event, erosion was estimated at 7259.94 ± 503.69 m3 along 550 m of beach. By combining the aerial imagery and derived topographic datasets we demonstrate the advantage of UAV-based photogrammetry techniques for rapid high-resolution data collection in semi-remote locations. Its utility in setting unlimited virtual vantage points is also illustrated and the valuable perspective it provides for tracking landscape change discussed.