A hybrid approach to predict the structure-borne noise transmission in ship structures using a waveguide method and Statistical Energy Analysis. The prediction of structure-borne noise transmission in large welded ship structures is required, in order to design maritime vessels with greater ship power and reduced weight, without increasing the noise levels. The aim of this project is to develop a hybrid approach for structural dynamic analyses using an analytical waveguide method and Statistical ....A hybrid approach to predict the structure-borne noise transmission in ship structures using a waveguide method and Statistical Energy Analysis. The prediction of structure-borne noise transmission in large welded ship structures is required, in order to design maritime vessels with greater ship power and reduced weight, without increasing the noise levels. The aim of this project is to develop a hybrid approach for structural dynamic analyses using an analytical waveguide method and Statistical Energy Analysis. The theoretical estimation and associated experimental measurement of the SEA parameters (modal density, coupling and internal loss factors) form the basis for the hybrid approach. The outcomes will result in improved predictive techniques for dynamic analyses of large complex resonant structures.Read moreRead less
Aggressive corrosion of steel infrastructure in marine environments. Marine corrosion is known to be aggressive, but how aggressive it can be under long term exposures is the critical question for the safety and economics of much industrial infrastructure, including harbour, coastal and offshore oil industry facilities. Bacterial and microbiological activity is known to contribute. However, recent findings have observed very aggressive corrosion also under sterile and apparently benign condition ....Aggressive corrosion of steel infrastructure in marine environments. Marine corrosion is known to be aggressive, but how aggressive it can be under long term exposures is the critical question for the safety and economics of much industrial infrastructure, including harbour, coastal and offshore oil industry facilities. Bacterial and microbiological activity is known to contribute. However, recent findings have observed very aggressive corrosion also under sterile and apparently benign conditions. No theory to explain these observations currently exists. A new hypothesis is proposed that in certain circumstances second-phase constituents of steels will facilitate autocatalytic corrosion under anoxic conditions. This project investigates the problem and explores mechanisms and conditions. Read moreRead less
Long-term corrosion of offshore steel structures in near-stagnant seawater. This project investigates the seawater corrosion of structural steels under near-stagnant and possibly polluted conditions. Better understanding of long-term corrosion of structural steels in near-stagnant seawaters is needed to predict the safety of steel offshore structures such as the pods supporting wind and wave energy generators. Also, the expensive maintenance of protective coatings and systems could be obviated o ....Long-term corrosion of offshore steel structures in near-stagnant seawater. This project investigates the seawater corrosion of structural steels under near-stagnant and possibly polluted conditions. Better understanding of long-term corrosion of structural steels in near-stagnant seawaters is needed to predict the safety of steel offshore structures such as the pods supporting wind and wave energy generators. Also, the expensive maintenance of protective coatings and systems could be obviated or reduced if corrosion remains acceptable. This project plans to investigate experimentally the temporal development and stochastic nature of general corrosion and pitting for steels under actual near-stagnant seawater conditions. It also plans to build mathematical-probabilistic models for corrosion prediction, calibrated to field data. These models will include allowance for microbiological corrosion effects, important under anthropological pollution.Read moreRead less
Short- and long-term corrosion of steels in highly calcareous seawaters . This project aims to quantify the development of the long-term (25-100 year) protective effect of calcareous deposits on the marine corrosion of mild steels. This is significant because such steels used extensively in major and very expensive coastal and offshore infrastructure. The project outcomes will improve scientific understanding, including the role of microbiological activity. It will develop and calibrate corrosio ....Short- and long-term corrosion of steels in highly calcareous seawaters . This project aims to quantify the development of the long-term (25-100 year) protective effect of calcareous deposits on the marine corrosion of mild steels. This is significant because such steels used extensively in major and very expensive coastal and offshore infrastructure. The project outcomes will improve scientific understanding, including the role of microbiological activity. It will develop and calibrate corrosion prediction models using classical and recently available 100 year data from Europe, the Pacific, Australia and also new project-specific experimental data. These models are expected to be of benefit for Australian engineering consultants in maintain their internationally competitive edge in offshore engineering.Read moreRead less
Environmental Study of the Wavemaking Characteristics of High-Speed Ferries. The aim is to perform a study of the wave-making characteristics of high-speed ferries of the monohull, catamaran, and multihull type in order to be able to predict their environmental impact on river banks and sea shores. The significance is that a number of ferry services have been curtailed or cancelled as a result of suspected wave damage. The outcome will be a methodology for computing the wave system produced by s ....Environmental Study of the Wavemaking Characteristics of High-Speed Ferries. The aim is to perform a study of the wave-making characteristics of high-speed ferries of the monohull, catamaran, and multihull type in order to be able to predict their environmental impact on river banks and sea shores. The significance is that a number of ferry services have been curtailed or cancelled as a result of suspected wave damage. The outcome will be a methodology for computing the wave system produced by such ferries in water of any depth. The nature of the rate of decay of the wave system will be included in the analysis.Read moreRead less
Dominant flow noise source identification for ducted marine propellers. Ducted marine propellers are becoming an increasing alternative to conventional open propellers. Understanding flow-induced noise generated by ducted propellers is a key consideration in the design process to minimise noise emission. This project aims to develop new methods to identify turbulent flow sources of a ducted marine propeller that dominate sound. High-fidelity numerical methods will be developed to study the compl ....Dominant flow noise source identification for ducted marine propellers. Ducted marine propellers are becoming an increasing alternative to conventional open propellers. Understanding flow-induced noise generated by ducted propellers is a key consideration in the design process to minimise noise emission. This project aims to develop new methods to identify turbulent flow sources of a ducted marine propeller that dominate sound. High-fidelity numerical methods will be developed to study the complex interaction between inflow turbulence, support struts, propeller blades and duct structure. Successful identification of the dominant sources of noise will allow for targeted noise mitigation strategies with significant impact for stealth of military vessels and reduction of underwater noise pollution on marine life.Read moreRead less
Prediction of radiated noise from marine propellers. Underwater noise radiated from marine vessels is a significant problem for research, fishing and military vessels, and is a major source of pollution in the marine environment. The major source contributing to underwater noise is due to the propeller. This work will develop numerical models with experimental validation that can accurately predict the sources of noise generated by marine propellers and acoustic signatures of marine vessels due ....Prediction of radiated noise from marine propellers. Underwater noise radiated from marine vessels is a significant problem for research, fishing and military vessels, and is a major source of pollution in the marine environment. The major source contributing to underwater noise is due to the propeller. This work will develop numerical models with experimental validation that can accurately predict the sources of noise generated by marine propellers and acoustic signatures of marine vessels due to propeller motion. This work has great significance for Australia’s construction and military maritime industries. The technologies developed in this project are also applicable to rotors in other industries such as in aircraft, helicopters and wind turbines.Read moreRead less
Natural Semantic Metalanguage (NSM): formalisation, computation, referential semantics. Meaning is what links language with culture, communication and cognition but strangely enough, most linguists do not regard semantics (the systematic study of meaning) as a central part of their discipline. This project pursues basic research in the leading meaning-based theory of language: the natural semantic metalanguage (NSM) theory, which has been originated and developed primarily in Australia. It aims ....Natural Semantic Metalanguage (NSM): formalisation, computation, referential semantics. Meaning is what links language with culture, communication and cognition but strangely enough, most linguists do not regard semantics (the systematic study of meaning) as a central part of their discipline. This project pursues basic research in the leading meaning-based theory of language: the natural semantic metalanguage (NSM) theory, which has been originated and developed primarily in Australia. It aims to make this theory more precise, to work out how it can be used by computers, and to connect it with other, more mathematically inspired approaches to meaning.Read moreRead less
The Grammar of Biblical Hebrew: Functional and Corpus Analyses. The project promotes original, innovative research in Australia into Biblical Hebrew linguistics. Advancement in the knowledge of linguistics increases our understanding of language and its central role in cognition, social interaction, and culture. Biblical Hebrew is the language of the Hebrew Bible, a text sacred to Judaism and Christianity, and of interest to the wider Australian public. The Hebrew Bible is inextricably bound to ....The Grammar of Biblical Hebrew: Functional and Corpus Analyses. The project promotes original, innovative research in Australia into Biblical Hebrew linguistics. Advancement in the knowledge of linguistics increases our understanding of language and its central role in cognition, social interaction, and culture. Biblical Hebrew is the language of the Hebrew Bible, a text sacred to Judaism and Christianity, and of interest to the wider Australian public. The Hebrew Bible is inextricably bound to these two religious traditions that continue to influence substantially Australian society and societies across the world. This project furthers Australia's capacity to contribute to the vital task of interpreting the Hebrew Bible in contemporary, responsible ways and translating it into the world's languages.Read moreRead less
Data Structures for Multi-Core. The project intends to improve data structures to reduce the bottleneck effect caused by multiple processor cores. The hardware used for a typical server platform has increasing numbers of processor cores. This growing number of cores creates a bottleneck effect when accessing the data that are structured in the shared memory of these servers. These contended data structures limit the server performance and new algorithms are necessary. The project proposes to rel ....Data Structures for Multi-Core. The project intends to improve data structures to reduce the bottleneck effect caused by multiple processor cores. The hardware used for a typical server platform has increasing numbers of processor cores. This growing number of cores creates a bottleneck effect when accessing the data that are structured in the shared memory of these servers. These contended data structures limit the server performance and new algorithms are necessary. The project proposes to relax traditional consistency criteria to provide high concurrency and to leverage optimistic executions that proceed concurrently but may roll back depending on the conflicts with other concurrent executions they encounter. The concurrent data structures would allow application performance to scale with higher numbers of hardware cores.Read moreRead less