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2006

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Novel Polycyclic Diels-Alder Adducts From Ring Distorted 3-Aza[5] And 3-Aza[6] (1,7) Napthalenophanes, John B. Bremner, Wasna Jaturonusmee Jan 2006

Novel Polycyclic Diels-Alder Adducts From Ring Distorted 3-Aza[5] And 3-Aza[6] (1,7) Napthalenophanes, John B. Bremner, Wasna Jaturonusmee

Faculty of Science - Papers (Archive)

Ring distorted 3-aza[5] and 3-aza[6](1,7)naphthalenophanes have been shown to undergo ready Diels-Alder cycloaddition reactions with 4-phenyl-1,2,4-triazoline-3,5-dione, tetracyanoethylene, 1,1-dicyanoethylene and 1,1-diethyl methylenemalonate to form new functionalized polycyclic heterocyclic derivatives. Addition was shown to occur selectively in each case in the less substituted aromatic ring of the naphthalene moiety.


Gay And Lesbian Identity Work At Home, Andrew W. Gorman-Murray Jan 2006

Gay And Lesbian Identity Work At Home, Andrew W. Gorman-Murray

Faculty of Science - Papers (Archive)

Geographical and sociological literature on gay/lesbian experiences of domestic environments has drawn attention to the heteronormativity of homes, focusing on how these sites often marginalise and silence gay/lesbian identities. While not denying these arguments, I suggest that many gay men and lesbians have also used domestic spaces to resist heteronormative socialisation and affirm gay/lesbian identities. In this paper I explore some of these affirmative uses. Drawing on 37 in-depth interviews with gay/lesbian Australians, I examine two key ways that some gay men and lesbians have used homes to consolidate their sexual identities: (i) the role played ...


Dust Deposition Rates In The Wollongong-Port Kembla Area, New South Wales, Australia, R J. Morrison, Bandar A. Fadhel, K Goss Jan 2006

Dust Deposition Rates In The Wollongong-Port Kembla Area, New South Wales, Australia, R J. Morrison, Bandar A. Fadhel, K Goss

Faculty of Science - Papers (Archive)

Dust deposition in the Wollongong-Port Kembla region, New South Wales, Australia, arising from local industrial and mining activities, has been of major concern since the early 1960s. Reports dealing with dust deposition rates in the region have been published by different organisations where the data have been averaged for the region. This provides a general trend for the deposition rates for the whole region without considering the trends occurring in specific locations. This study was the first to examine the trends observed at 35 individual gauges to identify more localised trends in dust deposition rates in the Wollongong-Port Kembla region ...


Sampling Patchily Distributed Taxa: A Case Study Using Cost-Benefit Analyses For Sponges And Ascidians In Coastal Lakes Of New South Wales, Australia, P. B. Barnes, A. R. Davis, D. E. Roberts Jan 2006

Sampling Patchily Distributed Taxa: A Case Study Using Cost-Benefit Analyses For Sponges And Ascidians In Coastal Lakes Of New South Wales, Australia, P. B. Barnes, A. R. Davis, D. E. Roberts

Faculty of Science - Papers (Archive)

Estuaries worldwide are under increasing threat from human impacts. Because much of their fauna remains unstudied and in many cases undescribed, these systems present real challenges for effective management. In eastern Australia the study of estuarine fauna is often further complicated by its patchy distributions. This is particularly the case for assemblages of sessile invertebrates in coastal saline lakes. This study quantified distributions of sponges and ascidians at a hierarchy of spatial scales in the seagrass meadows of 2 coastal saline lakes in New South Wales, Australia. Nine species of sponge, many of which were undescribed, and 3 species of ...


Investigation Of Large-Scale Washover Of A Small Barrier System On The Southeast Australian Coast Using Ground Penetrating Radar, Brian G. Jones, C Bristow, Adam D. Switzer Jan 2006

Investigation Of Large-Scale Washover Of A Small Barrier System On The Southeast Australian Coast Using Ground Penetrating Radar, Brian G. Jones, C Bristow, Adam D. Switzer

Faculty of Science - Papers (Archive)

Prehistoric depositional signatures for large-scale washover involving marine inundation events such as storm and tsunami have been the subject of considerable research over the last 15 years. Much of this research has focused on the identification of sand sheets in back-barrier environments as depositional records for extreme washover events. All these deposits must have a sediment source, and by their nature, the most likely source of sediment for washover into back-barrier environments is the barrier itself. This study identifies an erosional signature for large-scale washover from a small coastal barrier on the southeast Australian coast. A distinct lense of marine ...


Role Of Habitat Complexity In Structuring Temperate Rockpool Ichthyofaunas, S. P. Griffiths, A. R. Davis, R. J. West Jan 2006

Role Of Habitat Complexity In Structuring Temperate Rockpool Ichthyofaunas, S. P. Griffiths, A. R. Davis, R. J. West

Faculty of Science - Papers (Archive)

Habitat complexity in temperate intertidal rockpools was manipulated to assess its effect on fish assemblage structure. We modified the complexity of the substratum within pools by adding or removing loose rocks. The complexity of the water column within pools was modified by the removal of macro-algae and the addition of artificial algae. We applied 5 treatments to 40 pools in 2 locations on the southeast Australian coast: addition of rocks and algae (+R+A), removal of rocks and algae (–R–A), removal of rocks but addition of algae (–R+A), addition of rocks and removal of algae (+R–A), and ...


Proteomic Dissection Of Dna Polymerization, Jennifer L. Beck, Thitima Urathamakul, Stephen James Watt, Margaret Sheil, Patrick M. Schaeffer, Nicholas E. Dixon Jan 2006

Proteomic Dissection Of Dna Polymerization, Jennifer L. Beck, Thitima Urathamakul, Stephen James Watt, Margaret Sheil, Patrick M. Schaeffer, Nicholas E. Dixon

Faculty of Science - Papers (Archive)

DNA polymerases replicate the genome by associating with a range of other proteins that enable rapid, high-fidelity copying of DNA. This complex of proteins and nucleic acids is called the replisome. Proteins of the replisome must interact with other networks of proteins, such as those involved in DNA repair. Many of the proteins involved in DNA polymerisation and the accessory proteins are known, but the array of proteins they interact with, and the spatial and temporal arrangement of these interactions is a current research topic. Mass spectrometry is a technique that can be used to identify the sites of these ...


Evidence From Mitochondrial Genomics On Interordinal Relationships In Insects, Stephen L. Cameron, Andrew T. Beckenbach, Mark P. Dowton, Michael F. Whiting Jan 2006

Evidence From Mitochondrial Genomics On Interordinal Relationships In Insects, Stephen L. Cameron, Andrew T. Beckenbach, Mark P. Dowton, Michael F. Whiting

Faculty of Science - Papers (Archive)

No abstract provided.


Detection Of Moisture Stress In Eucalyptus Camaldulensis Using Leaf-Level Spectral Reflectance: Implications For Remote Sensing, Laurie A. Chisholm Jan 2006

Detection Of Moisture Stress In Eucalyptus Camaldulensis Using Leaf-Level Spectral Reflectance: Implications For Remote Sensing, Laurie A. Chisholm

Faculty of Science - Papers (Archive)

Foliage moisture stress may be detectable by remote sensing using high resolution spectral data, but meaningful diagnosis requires that plant water status be assessed on the ground under controlled conditions. Design parameters of an experimental plantation of E. camaldulensis (River red gum), were used to examine tree-level responses to moisture stress, as measured by xylem water potential, and relationships to physiological parameters including spectral reflectance, chlorophyll flurescence, and cholorphyll across a range of stress categories.


Comparison Of Virulence Gene Profiles Between Escherichia Coli Strains Isolated From Healthy And Diarrheic Swine, Mark R. Wilson, Xi Yang Wu, Idris Barchia, Karl A Bettelheim, Steven Driesen, Darren J. Trott, Toni A. Chapman, James J C Chin Jan 2006

Comparison Of Virulence Gene Profiles Between Escherichia Coli Strains Isolated From Healthy And Diarrheic Swine, Mark R. Wilson, Xi Yang Wu, Idris Barchia, Karl A Bettelheim, Steven Driesen, Darren J. Trott, Toni A. Chapman, James J C Chin

Faculty of Science - Papers (Archive)

A combination of uni- and multiplex PCR assays targeting 58 virulence genes (VGs) associated with Escherichia coli strains causing intestinal and extraintestinal disease in humans and other mammals was used to analyze the VG repertoire of 23 commensal E. coli isolates from healthy pigs and 52 clinical isolates associated with porcine neonatal diarrhea (ND) and postweaning diarrhea (PWD). The relationship between the presence and absence of VGs was interrogated using three statistical methods. According to the generalized linear model, 17 of 58 VGs were found to be significant (P < 0.05) in distinguishing between commensal and clinical isolates. Nine of the 17 genes represented by iha, hlyA, aidA, east1, aah, fimH, iroN(E. coli), traT, and saa have not been previously identified as important VGs in clinical porcine isolates in Australia. The remaining eight VGs code for fimbriae (F4, F5, F18, and F41) and toxins (STa, STb, LT, and Stx2), normally associated with porcine enterotoxigenic E. coli. Agglomerative hierarchical algorithm analysis grouped E. coli strains into subclusters based primarily on their serogroup. Multivariate analyses of clonal relationships based on the 17 VGs were collapsed into two-dimensional space by principal coordinate analysis. PWD clones were distributed in two quadrants, separated from ND and commensal clones, which tended to cluster within one quadrant. Clonal subclusters within quadrants were highly correlated with serogroups. These methods of analysis provide different perspectives in our attempts to understand how commensal and clinical porcine enterotoxigenic E. coli strains have evolved and are engaged in the dynamic process of losing or acquiring VGs within the pig population.


Asymmetric Synthesis Of Anti-1,2-Amino Alcohols Via The Borono-Mannich Reaction: A Formal Synthesis Of (-)-Swainsonine, Christopher W. G. Au, Stephen G. Pyne Jan 2006

Asymmetric Synthesis Of Anti-1,2-Amino Alcohols Via The Borono-Mannich Reaction: A Formal Synthesis Of (-)-Swainsonine, Christopher W. G. Au, Stephen G. Pyne

Faculty of Science - Papers (Archive)

Chiral α-hydroxy-aldehydes generated in situ by the ADH reaction of vinyl sulfones undergo a borono-Mannich reaction with β-styrenyl boronic acid and primary amines to give anti-1,2-amino alcohols in high enantiomeric purities (ee 83-95%). This new method allows much more rapid access to these valuable chiral building blocks that has been used in a short formal synthesis (10 synthetic steps from 4-penten-1-ol) of (-)-swainsonine.


Targeting C-Reactive Protein For The Treatment Of Cardiovascular Disease, Mark B. Pepys, Gideon M. Hirschfield, Glenys A. Tennent, J Ruth Gallimore, Melvyn C. Kahan, Vittorio Bellotti, Philip N. Hawkins, Rebecca M. Myers, Martin D. Smith, Alessandra Polara, Alexander J. A Cobb, Steven V. Ley, J. Andrew Aquilina, Carol V. Robinson, Isam Sharif, Gillian A. Gray, Caroline A. Sabin, Michelle C. Jenvey, Simon E. Kolstoe, Darren Thompson, Stephen P. Wood Jan 2006

Targeting C-Reactive Protein For The Treatment Of Cardiovascular Disease, Mark B. Pepys, Gideon M. Hirschfield, Glenys A. Tennent, J Ruth Gallimore, Melvyn C. Kahan, Vittorio Bellotti, Philip N. Hawkins, Rebecca M. Myers, Martin D. Smith, Alessandra Polara, Alexander J. A Cobb, Steven V. Ley, J. Andrew Aquilina, Carol V. Robinson, Isam Sharif, Gillian A. Gray, Caroline A. Sabin, Michelle C. Jenvey, Simon E. Kolstoe, Darren Thompson, Stephen P. Wood

Faculty of Science - Papers (Archive)

Complement-mediated inflammation exacerbates the tissue injury of ischaemic necrosis in heart attacks and strokes, the most common causes of death in developed countries. Large infarct size increases immediate morbidity and mortality and, in survivors of the acute event, larger non-functional scars adversely affect long-term prognosis. There is thus an important unmet medical need for new cardioprotective and neuroprotective treatments. We have previously shown that human C-reactive protein (CRP), the classical acute-phase protein that binds to ligands exposed in damaged tissue and then activates complement1, increases myocardial and cerebral infarct size in rats subjected to coronary or cerebral artery ligation, respectively2 ...


The Loss Of Carbon Dioxide From Activated Perbenzoate Anions In The Gas Phase: Unimolecular Rearrangement Via Epoxidation Of The Benzene Ring, David G. Harman, Aravind Ramachandran, Michelle Gracanin, Stephen J. Blanksby Jan 2006

The Loss Of Carbon Dioxide From Activated Perbenzoate Anions In The Gas Phase: Unimolecular Rearrangement Via Epoxidation Of The Benzene Ring, David G. Harman, Aravind Ramachandran, Michelle Gracanin, Stephen J. Blanksby

Faculty of Science - Papers (Archive)

The unimolecular reactivities of a range of perbenzoate anions (X−C6H5CO3-), including the perbenzoate anion itself (X = H), nitroperbenzoates (X = para-, meta-, ortho-NO2), and methoxyperbenzoates (X = para-, meta-OCH3) were investigated in the gas phase by electrospray ionization tandem mass spectrometry. The collision-induced dissociation mass spectra of these compounds reveal product ions consistent with a major loss of carbon dioxide requiring unimolecular rearrangement of the perbenzoate anion prior to fragmentation. Isotopic labeling of the perbenzoate anion supports rearrangement via an initial nucleophilic aromatic substitution at the ortho carbon of the benzene ring ...


Places Of Reconciliation: Gay, Lesbian And Transgender Place-Based Belongings In A Regional Australian Centre, Gordon R. Waitt, Andrew W. Gorman-Murray Jan 2006

Places Of Reconciliation: Gay, Lesbian And Transgender Place-Based Belongings In A Regional Australian Centre, Gordon R. Waitt, Andrew W. Gorman-Murray

Faculty of Science - Papers (Archive)

Place-based belonging is a key concern of geographical work on sexuality. Marginalised through practices of heterosexism and homophobia, gay men, lesbians and other sexual minorities have a heightened awareness of where they belong – of where they can perform sexual difference. Much research here focuses on place-based belonging in metropolitan centres. There is less consideration of how sexual minorities sustain place-based belonging in regional centres, which are also believed to exhibit higher levels of homophobia. Drawing on in-depth interviews, we examine how sexual minorities generate place-based belonging in Townsville. We argue that place-based belonging be understood as an ongoing relational process ...


The Role Of Accounting Systems In Decision Making, Planning And Control In A Developing Country: The Case Of Libya, Bubaker Shareia Jan 2006

The Role Of Accounting Systems In Decision Making, Planning And Control In A Developing Country: The Case Of Libya, Bubaker Shareia

University of Wollongong Thesis Collection 1954-2016

This study examines the present and potential role of accounting information systems in meeting the development needs of developing countries, with a special focus on Libya and its unique legal, economic, religious, political and social context. A contextualised study, it uses the economic development Theory of Globalisation in order to interpret the data, with particular emphasis on social and cultural factors determine economic condition, communication and its significance in global world and greater technological unification, including globalised accounting. Within the Libyan context, an ideographic methodology is used to develop two case studies. One organisation is examined as a provider of ...


The Migration Of Academic Professionals From Northeast Asia To Australia: A Survey Comparing Academic Immigrants From China, Hong Kong And Taiwan, Samad Yaghoubi Hargalan Jan 2006

The Migration Of Academic Professionals From Northeast Asia To Australia: A Survey Comparing Academic Immigrants From China, Hong Kong And Taiwan, Samad Yaghoubi Hargalan

University of Wollongong Thesis Collection 1954-2016

In recent years, highly skilled migrants have represented an important component of global migration streams. This research is a comparative study of the migration of academic professionals from China, Hong Kong and Taiwan to Australia, a 'nation of immigrants' which receives many highly trained professionals from different parts of the world, especially Asia. The main goal was to analyse the effects of in-system and out-system factors on the emigration process, as well as the effects of facilitating conditions, all as perceived by the academic migrants themselves. An intersystem model of intemational migration was developed, based on Robert K. Merton's ...


A Model For Improving Wastewater Treatment Plant Performance From 'Command & Control' To Managing In Compliance With Esd Principles, Debashis Raha Jan 2006

A Model For Improving Wastewater Treatment Plant Performance From 'Command & Control' To Managing In Compliance With Esd Principles, Debashis Raha

University of Wollongong Thesis Collection 1954-2016

Water is the basis of all life, human well-being and economic development. It links together all aspects of life on this planet- human and environmental health, food supply, energy and industry. Wastewater is one of the most important sources of surface and ground water pollution due to the chemical and biological pollutants that it contains and is the world’s greatest killer. Some 1.8 million child deaths each year as a result of diarrhoea, the loss of 443 million school days each year from water-related illness and close to 2.8 billion people in developing countries suffering at any ...


Electrocoagulation Technology As A Process For Defluoridation In Water Treatment, Mohammad Mahdi Emamjomeh Jan 2006

Electrocoagulation Technology As A Process For Defluoridation In Water Treatment, Mohammad Mahdi Emamjomeh

University of Wollongong Thesis Collection 1954-2016

Excess fluoride ion in drinking water is a serious public health problem because it has beneficial and harmful effects. When an optimum amount of 1 mg/L is present in drinking water it helps prevent decay in teeth, but long term consumption of water containing excessive fluoride (≥ 1.5 mg/L) can lead to fluorosis of the teeth and bones. There are several methods for removing fluoride, and one method that has recently received attention is electrocoagulation (EC) technology. The word "electrocoagulation" will be sometimes used with "electroflotation" and can be considered as the electrocoagulation/flotation (ECF) process. Through the ...


Nw Borneo Reservoir Characterisation Based On Sedimentological Evaluation Of Turbidite Facies, Mavise Sharon Nyipong Jan 2006

Nw Borneo Reservoir Characterisation Based On Sedimentological Evaluation Of Turbidite Facies, Mavise Sharon Nyipong

University of Wollongong Thesis Collection 1954-2016

Borneo was positioned in an exceedingly dynamic tectonic area throughout the Tertiary at the edge of an Early Cretaceous continental fragment and is surrounded by the Sunda Shelf, South China Sea, Sulu Sea, Celebes Sea, the narrow Makassar Strait and the Java Sea. Throughout this period of time, the Northwest Borneo basin and other adjacent basins (sedimentary and marginal) were formed and deformed as a result of the subduction and extension of the surrounding plates.

The Northwest Borneo basin is distinguished by a steep slope from shelf to basin floor and shows high flow rates of turbidite sediment. The study ...


Adverse Health Effects Of Air Polluion [Sic] On Primary School Children In Tehran, Narges Bagheri Lankarani Jan 2006

Adverse Health Effects Of Air Polluion [Sic] On Primary School Children In Tehran, Narges Bagheri Lankarani

University of Wollongong Thesis Collection 1954-2016

Health effects caused by air pollutants may range from subtle biochemical or physiological signs, such as mildly reduced lung function, to difficult breathing, wheezing, coughing and exacerbation of existing respiratory conditions such as asthma, and chronic obstructive pulmonary disease (COPD). These effects can lead to school absenteeism, increased medication use, increased doctor or emergency room visits and more hospital admissions.

Lung function and respiratory symptoms have been the primary focus of most studies addressing the respiratory health effects of air pollution among children. Peak expiratory flow (PEF) has been found to be significantly lower in children exposed to air pollution ...


A Conceptual Framework For Understanding And Measuring B2b Online Service Quality, Lois Ann Burgess Jan 2006

A Conceptual Framework For Understanding And Measuring B2b Online Service Quality, Lois Ann Burgess

University of Wollongong Thesis Collection 1954-2016

As more and more businesses move online, research into the determinants and measurement of online service quality has become a research imperative (Zeithaml et al., 2000; Bitner, Parasuraman et al., 2005). Notwithstanding, research in this area is still in its infancy and much of the existing research is largely anecdotal, centering on consumer perceptions and ignoring the business customer perspective. As a result, to date, limited insights have been gained. This study represents a first attempt at addressing this gap in the scholarly literature. A two-phase study design was used to 1) explore the meaning of B2B online service quality ...


Training General Practitioners In Evidence-Based Mental Health Treatment: Evaluation Of A Cognitive Behavioural Therapy Group Supervision Program, Rachael Murrihy Jan 2006

Training General Practitioners In Evidence-Based Mental Health Treatment: Evaluation Of A Cognitive Behavioural Therapy Group Supervision Program, Rachael Murrihy

University of Wollongong Thesis Collection 1954-2016

This thesis investigates CBT group supervision as a potential GP training model. An initial pilot trial of CBT group supervision indicated that GPs' confidence, knowledge and perceived skills in CBT, increased significantly over the supervision period. Patients' depressive and anxious symptomatology also improved. Outcomes from this pilot study, and qualitative results from a focus group were used to devise a brief CBT (BCBT) group supervision program for the main trial that incorporated role-play and case-based discussion, targeting specific GP competencies in a structured format.


Place, Sexualities And Community: Theorising The Constitution Of 'Lesbian' Identities, Karen Lambert Jan 2006

Place, Sexualities And Community: Theorising The Constitution Of 'Lesbian' Identities, Karen Lambert

University of Wollongong Thesis Collection 1954-2016

This thesis examines, using queer theory - and in particular the work of Judith Butler - the ways in which five women re-construct and re-tell stories of importance to their notions of sexual self. In this process we learn about the complex ways in which they actively story and construct their sexual ‘selves’ over time and place, which in turn exposes the constrictive heteronormative discourses they draw upon in order to make sense of their lives as ‘lesbians’. In short, it explores how significant ‘things’ like coherence, loss and place come to matter to those attempting to live on the sexual margins ...


Toward A Reinforcement-Sensitive Psychophysiological Model For Health-Related Behaviours And Health Communications, Mubeen M. Aslam Jan 2006

Toward A Reinforcement-Sensitive Psychophysiological Model For Health-Related Behaviours And Health Communications, Mubeen M. Aslam

University of Wollongong Thesis Collection 1954-2016

This dissertation explores the hypothesised role of psychobiological personality dimensions in shaping specific health-related behaviours and propositions potential health communications. The primary aim was to investigate Eysenck’s and Gray’s personality dimensions in relationship to specific smoking, alcohol-use, substance-use, physical exercise and eating behaviours. Past research has either focussed on a narrow range of behaviours or examined the relation between personality, health behaviours and message interventions insufficiently. It is argued that most health behaviours are a function of psychophysiological processes and social learning, and future research should find them differentially conditionable by appropriate punishment- or reward-oriented messages.

The dissertation ...


An Examination Of The Sustainability Of Online Communities In Australia: Including The Findings Of Participatory Action Research Undertaken On A Beta 3rd Generation Network Type Regional Community Portal In New South Wales, Andrew Connery Jan 2006

An Examination Of The Sustainability Of Online Communities In Australia: Including The Findings Of Participatory Action Research Undertaken On A Beta 3rd Generation Network Type Regional Community Portal In New South Wales, Andrew Connery

University of Wollongong Thesis Collection 1954-2016

This thesis examines the operations and viability of community portals (RCP) generally and within Australia specifically. It records and analyses, through participatory action research undertaken by the candidate, the development of a beta 3rd generation network type community portal (NCP). The particular aspect of interest in this community portal is that it is a commercial venture aimed at achieving long-term economic sustainability. The evolution of portals can be traced back to the origins of the internet. As a group they can be classified into three broad categories: internet, intranet and extranet. In this thesis it is assumed that a community ...


Predictive Models For The Environmental Degradation Of Coastal Lagoon Beaches In New South Wales, Shannon Mark Webb Jan 2006

Predictive Models For The Environmental Degradation Of Coastal Lagoon Beaches In New South Wales, Shannon Mark Webb

University of Wollongong Thesis Collection 1954-2016

To date a large proportion of coastal researchers have focused their texts and reviews on estuaries to the detriment of coastal lagoons, which have virtually been ignored (Bird 1994). Lagoons are characteristic of much of the temperate southeast coastline of Australia. New South Wales alone has over 70 coastal lagoons and lakes. The NSW coastline is densely populated and developed and is under increasing environmental pressure. Continued population growth in the coastal region demands enhanced coastal management. The current high level of coastal development means that coastal lagoons are frequently subject to a range of direct and indirect impacts due ...


Foreign Exchange Risk Management: A Description And Assessment Of Australian Firms' Practices, Bunyamin Jan 2006

Foreign Exchange Risk Management: A Description And Assessment Of Australian Firms' Practices, Bunyamin

University of Wollongong Thesis Collection 1954-2016

The extension of floating exchange-rate regimes and going change in the global nature of business are the two of the most critical factors that constitute business risk today. Australian firms engaging in international business have to manage the adverse consequences of exchange rate movements because firms may confront greater business risk that arises from, among other factors, the volatility of the Australian dollar since floating in 1983, the nature of the Australian products sold overseas, and the increase in international operations of the firm. Recent corporate crashes, indeed, demonstrate the urgency for managing foreign exchange exposure as part of providing ...


Impulse Control Systems For Servomechanisms With Nonlinear Friction, Stephen Van Duin Jan 2006

Impulse Control Systems For Servomechanisms With Nonlinear Friction, Stephen Van Duin

University of Wollongong Thesis Collection 1954-2016

At low velocities, friction is highly non linear and difficult to control. In practical mechanisms, friction may also be position dependent and highly variable. This can lead to tracking errors, limit cycles, and a phenomenon referred to as 'stick-slip', when a periodic cycle of alternating motion and rest, limits the mechanism's velocity and position accuracy. Impulse control is a friction compensator that does not require an accurate friction model. It achieves precise motion of a servomechanism by applying small impacts which overcome static friction with a controlled breakaway. The size of the impact and its duration determine how much ...


Constraint-Based & Agent-Based Requirements Engineering, Y. Guan Jan 2006

Constraint-Based & Agent-Based Requirements Engineering, Y. Guan

University of Wollongong Thesis Collection 1954-2016

Non-functional requirements represent a critical and difficult problem in requirement engineering, but are often ignored. Usually, these are articulated as statements of objectives, as opposed to propositional assertions. A key challenge in dealing with objectives is that there is no obvious means of deciding when they are satisfied. In effect, these objectives are never fully satisfied, but satisficed to varying degrees. In evaluating alternative design decisions, we need to trade-off varying degrees of satisfaction of potentially mutually contradictory non-functional requirements. One key contribution of this work is the use of the hierarchical constraint logic programming framework in dealing with non-functional ...


Investigation Of The Expression Profile Of Streptokinase, Priya Shyam Jan 2006

Investigation Of The Expression Profile Of Streptokinase, Priya Shyam

University of Wollongong Thesis Collection 1954-2016

Streptococcus pyogenes (group A streptococcus; GAS) is a Gram-positive bacterium that causes invasive and non invasive infections in human skin and mucosal tissue. Since the mid-1980s, a conspicuous increase in the incidence and severity of invasive infections caused by GAS has been observed worldwide. S. pyogenes infections are endemic amongst many Aboriginal communities of Northern Australia. With rates of infection in these communities being amongst the highest in the world, there is an urgent need for identifying the key virulence factors involved in the initiation and progression of invasive GAS diseases. Streptokinase, a secreted group A streptococcal protein, activates host ...