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Studies On The Nucleic Acids Of Bacteria Isolated From Greening And Dieback Infected Citrus, Gonzalo Hortelano Hap

University of Wollongong Thesis Collection 1954-2016

Greening disease is a severe disease of citrus affecting crops in Southern Africa and Asia. The disease is thought to be caused by bacteria seen in planta by electron microscopy. In Australia, Australian citrus dieback (ACD) has symptoms which closely resemble those of greening, although the aetiological agent requires confirmation. A number of bacterial isolates with an ultrastructure similar to that described for the putative causal agent of greening have been studied. The DNA from the different organisms was compared by pulsed field gel electrophoresis after bacterial restriction endonuclease digestion analysis (BRENDA) using a number of endonucleases, and restriction fragment …

The Wollongong Personal Computer: Aspects Of Software, Gary J. Stafford

University of Wollongong Thesis Collection 1954-2016

This thesis describes the design of a small personal computer, which has the hardware design influenced by the requirements of the operating system, and the operating system design influenced by the considerations of hardware efficiency and cost. The operating system has its requirements met with simple hardware support. The hardware is constrained to provide support which can be conveniently used by the operating system. Various units of the machine are looked at in detail and novel approaches are suggested which will allow software to make best use of the hardware. The video memory board allows multiple pixels to be simultaneously …

Effect Of Self-Monitoring Strategies On Motor Skill Performance, Michael Bradley Martin

University of Wollongong Thesis Collection 1954-2016

If individuals wish to change or self-regulate their behaviour then it is necessary to self-monitor existing behaviours. Current self-monitoring theory embodies two principles which suggest that: 1. for difficult tasks, positive self-monitoring improves performance, while negative self-monitoring impairs performance, and 2. for easy tasks, positive self-monitoring impairs performance, while negative self-monitoring improves performance. However, the effect of implementing the various self-monitoring strategies as task complexity changes is unknown. The project consisted of a series of three studies that enlisted 42 university student subjects, 17 males and 25 females (M = 24.8 yrs.). The first study ascertained subjects' performance scores and …

Effect Of Ti And Ti-Nb On The Stability Of The Austenite Grain Structure And [Austenite To Ferrite] Transformation Characteristics In C-Mn Steel Under Hot Rolling Conditions, Bing Feng

University of Wollongong Thesis Collection 1954-2016

A series of experiments using heat-treatment, carbon replication extraction, single-pass rolling in the stable γ region and in the (γ+ α) two-phase region have been carried out to investigate the effect of Ti and Ti-Nb additions on the austenite grain coarsening behaviour, the alloy carbonitride particle size distribution, γ-> α transformation and the restoration characteristics of deformed y and α in a series of commercial slab cast 0.13%C-1.45%Mn base steels. The microalloyed steels consisted of 0.016%Ti, 0.076%Ti, 0.025Nb and 0.019%Ti plus 0.024%Nb. The Ti: N ratios in the three Ti-bearing steels were ~2.66, 10.1 and 2.1, respectively.

Experimental results showed …

The Dynamics Of Underwater Explosions, John Philip Best

University of Wollongong Thesis Collection 1954-2016

The two principal phenomena associated with an underwater explosion are bubble motion and shock wave propagation. In this thesis both are investigated.

The study of bubble dynamics proceeds by assuming irrotational flow in incompressible and inviscid fluid. A technique is developed for the derivation equations of motion for a spherical bubble in flow domains of simple geometry.The concept of the Kelvin impulse is exploited in this endeavour. The model is used to infer the behaviour of bubbles that deform from spherical shape.

The boundary integral method is then employed to compute the motion of underwater explosion bubbles. The pressure within …

Innovation, Technology Strategy And The Role Of External Technology Search Mechanisms, John Currie

University of Wollongong Thesis Collection 1954-2016

In Australia considerable attention has been focused in the past few years on the position of our international competitiveness. In the deregulated world of the 1980's it is not always possible for governments to rely solely on adjusting of the economic levers with the use of macroeconomic factors such as monetary, fiscal and income policies. Attention has been shifted to the long-term goals of structural alteration and reform at the microeconomic level of the individual firm. Emphasis on the more efficient allocation of resources, appropriateness and timing of technological investment, improved organisational, managerial and labour pracitices and the ability to …

The Use Of Marketing Information In The New Product Development Process: An Empirical Investigation, Elias Kyriazis

University of Wollongong Thesis Collection 1954-2016

The new product development process, and the use of marketing information, have each received a considerable amount of research interest in their own right. However, the relationship between the two areas has been largely neglected by researchers. Due to the critical importance of new product development activities to the continued viability of many companies, especially in an increasingly competitive global environment, this lack of attention is surprising. The thesis of this study is that the use of marketing information in the new product development process is an important one for corporate activity if such a process is to be successful. …

A Short History Of State Education Policy For Gifted And Talented Children In New South Wales 1788-1989, Janice M. Hall

University of Wollongong Thesis Collection 1954-2016

The recent recognition by educationists in general, and the New South Wales Department of School Education in particular, of the educational and social needs of gifted and talented children, has raised many questions for educators to consider. Before these can be answered it is necessary to review the New South Wales history of State Education Policy for gifted and talented children.

This thesis describes an investigation of the history of education policy making for gifted and talented children within N.S.W. Department of School Education from 1788 to 1989. This investigation has revealed that no formal Government Policy existed until 1983, …

"Posh Writing": Empowering Secondary Students To Write The Discourse Of History Effectively, Riddhi Devi Bargon

University of Wollongong Thesis Collection 1954-2016

This study examines the extent to which two students develop control over the expository genre of writing in their creation of historical texts.

Halliday's functional model of language provides the linguistic theoretical framework for the study.

Year 10 History students were exposed to a style of teaching which was based on the Disadvantaged Schools Program's pedagogical framework; 'The Curriculum Genre'. Interactive guidance and assistance were at the core of teaching strategies used by the teacher/researcher.

Ten essays written by two Year 10 students were analysed in terms of generic (schematic) structure, themes/reference, conjunctions and nomina/,isations, participants and processes.

The findings …

Cost Effective Navigation Of Mobile Robots, David Sydney Colless

University of Wollongong Thesis Collection 1954-2016

The navigation of a robot from a source to a target location is a process that requires the gathering and use of environmental information. This process is costly in terms of both sensor equipment and computer processing power.

This thesis attempts to minimise these costs by looking at minimal environment information. This is to be achieved using readily available components and computer algorithms designed to make the most of the information collected. A simple implementation of Dead Reckoning has been employed to demonstrate the gains made.

Significant savings can be achieved using these methods.

The Effect Of Solute Stress On The Petite Mutation In Yeast, William 'Anitimoni Petelo

University of Wollongong Thesis Collection 1954-2016

An increased proportion of petite mutants was observed when mid-exponential cultures of Saccharomyces cerevisiae were transferred to a salt broth containing 10% NaCl as compared to a low spontaneous proportion that arose 'before transfer' (normal culture) to the salt broth. The proportion of mutants arising from salt exposure is a characteristic of individual yeast strains. This increase in proportion of mutants appeared to be due to the mutagenic action of the salt stress, rather then an enhanced survival of the pre-existing petite strains before salt stress. Petite mutants were not inherentiy more resistant to salt stress than the parent strains. …

The Quantitation Of Glucosinolates In Rapeseed, John Thomas Tholen

University of Wollongong Thesis Collection 1954-2016

The aim of this project was to develop in the first instance, a method for determination of the total glucosinolate (GSL) content in rapeseed,which could readily be adopted by a non-specialist chemical laboratory. Chapter 2 of this thesis describes a rapid yet simple assay which employs a reflectance measurement. This method is capable of being used by plant breeders and non technical personnel at collection points of silos.

The Poetic Vision, Rita Joan Brassil

University of Wollongong Thesis Collection 1954-2016

The purpose of this documentation is to record intentions and methods of practice for four works madeduring 1988-90 at Wollongong University and exhibited in a retrospective at the Fourth Australian Sculpture Triennial Melbourne 1990. However, these works need to be seen in the context of installations made over the past two decades. The chronology begins with works commenced during studies at the Power Institute of Fine Arts, 1969-71, and culminating in works made during three years as a post-graduate at the University of Wollongong, 1988-90. I have adopted a structure based on Trilogies.

The method of documentation is presented in …

Abrasive Wear Of Ferrous Alloys, Liqun Xu

University of Wollongong Thesis Collection 1954-2016

The investigation reported in this thesis was carried out to study the abrasive wear behaviour of three groups of ferrous alloys, comprising ten carbon steels, three tool steels and four high-strength low-alloy steels, with the particular emphasis on the effect of microstructure. Wear tests were conducted using an unlubricated pin-on-drum machine, with silicon carbide, alumina and garnet abrasive papers, and a standard test condition of 20N applied load, 50mm/s sliding speed and 6m wear path.

The inter-relationships between wear resistance, microstructure, hardness and carbon content were studied using the carbon steels containing 0.10%C to 1.4%C. For constant hardness and carbon …

Telling Tales: Rider Haggard's Short Stories, Michael Arrighi

University of Wollongong Thesis Collection 1954-2016

Given the absence of critical studies of Rider Haggard's short stories, this study critically examines the short stories finding in them justification for the claim that after the outstanding successes of King Solomon's Mines, She, and Allan Quatermain there is a notable decline in Haggard's writing. As a critical perspective of this phenomenon, the Introduction examines biographical factors conditioning the quality of Haggard's writing and offers a brief history of the nineteenth century short story genre. Chapter 1 asks: Was Allan Quatermain Haggard's spokesman or was he merely an imaginative manifestation of the escapist hero-worship of the Victorian age? In …

Talking Our World: An Experiment In Community Theatre For Women, Robbie Collins

University of Wollongong Thesis Collection 1954-2016

This project melds the creative and the theoretical in its presentation and analysis of two community theatre projects which were devised and performed by a group of women at a local amateur theatre. The first production was titied Just Between You And Me. and the second. All This Talk. Both plays foreground the "talk" of women in celebration and in questioning the roles of women. The scripts of the plays were workshopped and written using a consensual methodology. The dynamics of group interaction inspired the productions with an intensity which brought considerable audience comment and no small amount of personal …

Determination Of Volatile Organic Compounds In Coke Oven Emissions, Peter John Kirton

University of Wollongong Thesis Collection 1954-2016

A new sampling device has been constructed for measuring occupational exposure to airborne organic compounds. The sampler enables the simultaneous determination of mono- and polycyclic aromatic hydrocarbons. Where these compounds are associated with dust particles, the sampler can collect both the inhalable and respirable portion of these particles. The sampler comprises three sections in series: a Teflon filter and two adsorbents, graphitised carbon and activated charcoal. The compounds trapped in each section are desorbed with small volumes of carbon disulphide and the hydrocarbons and other organics determined by gas chromatography, using either flame ionisation or mass spectrometric detection. The sampler …

Morphological And Serological Characterization Of Bacterial Isolates From Greening/Dieback Diseased Citrus, Daniel Carlos Bock

University of Wollongong Thesis Collection 1954-2016

The morphological and serological characteristics of bacterial isolates from plants infected with African greening, Reunion greening and Taiwan likubin were investigated. Isolates from Australian citrus dieback affected trees and resembling the putative greening isolates, were also included. Although predominantly long thin rods, the bacterial cells were morphologically variabile in both liquid and plate cultures at 25°C and 35°C. "Round forms" developed with age and nutrient limitations. Based on colony morphology and pigmentation, the isolates were categorized into two groups - Groups 1 and 2. Whole cell protein patterns were obtained by SDS-PAGE. Patterns of the Group 1 isolates, which were …

The Effects Of Reproduction And Dispersal On The Population Structure Of A Freshwater Ostracod, Jennifer Ann Chaplin

University of Wollongong Thesis Collection 1954-2016

The need for studies of the roles of sexual and asexual reproduction in the life-history of species able to use both modes of reproduction is well recognised. This study uses a combination of approaches to investigate the life-history strategy of the freshwater ostracod Candonocypris novaezelandiae. This species was selected for study because it is common in a range of temporary and permanent water bodies, and includes populations with and apparently without males (and hence may have the capacity for sexual and asexual reproduction). Thus its life-history strategy is potentially directly comparable with the relatively well documented 'Daphnia model' …

Environment Exploration And Path Planning Algorithms For Mobile Robot Navigation Using Sonar, Alexander Zelinsky

University of Wollongong Thesis Collection 1954-2016

The work reported in this thesis is motivated by the need to construct a navigation system for mobile robots which can operate in unknown and partially known environments, and which has the capability to progressively learn an environment A new environment mapping procedure is described that constructs high resolution maps of an environment using ultrasonic range sensing. The ultrasonic range maps are converted into quadtrees. Quadtrees are used by the navigation system as the data structure that models the environment.

This thesis presents a new algorithm for a mobile robot to explore an unknown environment using the quadtree data structure …

Adaptive Control Of Power System Stabilising Devices, Feroze Coowar

University of Wollongong Thesis Collection 1954-2016

A frequency domain approach is used to analyse low frequency oscillations in a power system where the oscillations are viewed as the result of disturbances originating from a section of the network and reflected on the remainder of the network. Available control theory for counteracting exogenous disturbances are thus readily applicable (e.g. the internal model principle). Further, this approach is shown to be capable of revealing risky situations which otherwise could not be detected. The gain characteristics of closed loop transfer functions, which reflect the effect of disturbances on power angle oscillations, are shown to be crucial in identifying frequency …

Adaptive Dynamic Control For Robotic Manipulators, Martin D. Liu

University of Wollongong Thesis Collection 1954-2016

The investigations and research introduced in this dissertation are about the development of novel adaptive control strategies for trajectory tracking motion control of robotic manipulators. The overall control system structure is based on a two-component control law: one is a filli model inverse dynamic control law (the computed torque control scheme) which is a non-adaptive control component and the other is an adaptive control component. Because the dynamic parameters used in the first control law do not usually match the real unknown parameters of the controlled robot dynamics, the resultant tracking error equation is not exact. For this tracking error …

Sediment Budgets And Quaternary History Of The Magela Creek Catchment, Tropical Northern Australia, Richard G. Roberts

University of Wollongong Thesis Collection 1954-2016

The Magela Creek catchment is situated in tropical northern Australia. This thesis examines the contemporary sediment transport regime of the sand-bed Magela Creek, the Holocene alluviation of its palaeochannel, the Quaternary history of extensive colluvial sand aprons developed along the flanks of the Arnhem Land plateau, and the chronology of isolated alluvial and lacustrine deposits on the plateau surface. Catchment sediment budgets are constructed at contemporary (AD 1950-1989), Holocene (0-7 kyr) and Pleistocene (7-20 kyr) timescales, and a sedimentation chronology for the sand aprons extended back to ∼240 kyr.

Contemporary sediment and solute transport rates in the Magela Creek were …

Oil Shales, Neil Sherwood

University of Wollongong Thesis Collection 1954-2016

The main petrological factors that control occurrences and properties of oil shales are depositional environments, organic sources, diagenesis and maturation. The present studies on organic petrography, organic geochemistry and their interrelationships provide insights into these controls and lead to improved methods of characterisation and classification of oil shales and other organic matter-rich rocks.

The Origins And History Of The Transport Workers' Union Of Australia, 1883-1975, Bradley Bowden

University of Wollongong Thesis Collection 1954-2016

This thesis traces the origins and history of the Transport Workers' Union of Australia between the early 1880s and 1975, analysing the factors that aided and constrained its emergence as the predominant trade union organisation in Australia's road transport sector.

The Effect Of Japanese Technology Transfer To Indonesia: A Study Of The Effect Of Technology Transfer On Managerial Skill Formation Of The Host Country's Employees, Zein Heflin Frinces

University of Wollongong Thesis Collection 1954-2016

This thesis is a result of an intensive empirical and exploratory field research conducted among Japanese subsidiaries operating in Indonesia based on case studies. This research studies the effect of Japanese technology transfer to Indonesia on the managerial skill formation of Indonesian employees.

This thesis consists of 6 chapters. Chapter 1 contains background reasons for selecting the research topic and a "problem statement" of the research. Chapter 2 sets out the detailed stages of the way this study has been conducted. Chapter 3 provides a review of previous research that forms the basis for the research guidelines for the study. …

Heat Affected Zone Structure And Properties Of A Welded Copper Bearing Hsla Steel, Xiaping Lin

University of Wollongong Thesis Collection 1954-2016

A weld joint produced by a fusion welding process consists of the weld metal and affected zone (HAZ). The macro- and microstructures and mechanical properties of these regions determine the weldability of a material. Although the composition of the weld metal can be varied by the choice of filler metal and the extent of dilution, the HAZ has a composition which is essentially the same as the base plate and is an identifiable region because of the structural changes induced by the weld thermal cycle. The HAZ is important because of its potential to develop structures which adversely affect the …

"Tempers Unchained": Politics And Meaning Of Pre-Independence Papua New Guinea Drama, Regis Tove Stella

University of Wollongong Thesis Collection 1954-2016

Colonialism has always had a dramatic impact upon traditional societies. Not only does it alienate and dispossess indigenous peoples from their cultural provenance but arrests their intellectual/ so that they view their own cultures as necessarily inferior to Western cultures. It was essentially in response to colonialism that preindependence Papua New Guinea drama and writing in general emerged. The introduction of Western education (especially tertiary education) made Papua New Guineans aware of their exploitation and subjugation by a foreign power and at the same time raised their conscioijhess that it was not right for them to be oppressed by a …

Rural Income And Employment In Indonesia: A Case Study Of The Cimanuk River Basin In Java, Sandra Mark

University of Wollongong Thesis Collection 1954-2016

The literature on rural employment and incomes in Java generally uses either the literary or the econometric approach. This thesis attempts to bridge the gap, by using data from a survey of six villages in West Java in 1982/83 and reveals some interesting features not hitherto brought out.

Differences in location (agro-climatic zone and accessibility) can affect rural life patterns more than modern rice technology or tenurial status. Location also determines whether rural households are "pushed" or "pulled" into non-agriculture.

The area of rice sawah land cultivated is also crucial in rural activity: this alone can explain 40 percent of …

Articulation Of Students From Women's Access Courses In The Technical And Further Education System With Particular Reference To The N.S.W. Career Education For Women Certificate, Jacqueline F.M. Evans

University of Wollongong Thesis Collection 1954-2016

This study is concerned with mature age woiuen who are in the main seeking to re-enter the workforce after a period of absence. The study focuses on the women who are using a Womens' Access Course as an avenue into the technical education system. Their aims centre around improving their qualifications for a job. They may also be aiming at improving their ability to undertake further study or facilitating a change of career. Over the last twenty years it has become obvious that the nature of women's participation in the Australian workforce has been changing. Many women are abandoning the …