Modelling and Measurement of Flow-Structure Dynamics in the Human Upper Airway. Sleep disruption due to the common and disabling conditions of snoring and obstruction of the human upper airway can result in chronic fatigue, lost work and accidents caused by daytime drowsiness. To date the behaviour of the upper airway has not been adequately studied in terms able to reveal the mechanical causes of these conditions. This deficiency is addressed through the development and use of simulation tools ....Modelling and Measurement of Flow-Structure Dynamics in the Human Upper Airway. Sleep disruption due to the common and disabling conditions of snoring and obstruction of the human upper airway can result in chronic fatigue, lost work and accidents caused by daytime drowsiness. To date the behaviour of the upper airway has not been adequately studied in terms able to reveal the mechanical causes of these conditions. This deficiency is addressed through the development and use of simulation tools and measurement techniques that will elucidate the flow-structure dynamics leading to new diagnostic and improved treatment methods. Simulating the effect of treatment on any individual will permit it to be chosen to maximise its efficacy for a problem that costs the nation an estimated $2 Billion per year in lost productivity.Read moreRead less
Minimally invasive monitoring of sleep for disease management. Sleep, diet and exercise are the three pillars of wellbeing with poor sleep associated with medical issues such as obesity and congestive heart failure. This project will advance sleep analysis by researching new ways of monitoring that are highly accurate and convenient, enabling physicians to improve the monitoring of significant health issues.
Matched experimental observation and finite-element simulation of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes. Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this couple ....Matched experimental observation and finite-element simulation of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes. Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this coupled system (the fluid flow interacts with the tube shape), we seek to demonstrate for the first time that a given theory/computer model encompasses the physics controlling a given observed oscillation. The solution will find application in other flexible-structure design problems in engineering, and also potentially in medicine.Read moreRead less
Matched experiments and numerical simulations of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes. Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this coupled system (the ....Matched experiments and numerical simulations of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes. Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this coupled system (the fluid flow interacts with the tube shape), we seek to demonstrate for the first time that a given theory/computer model encompasses the physics controlling a given observed oscillation. The solution will find application in other flexible-structure design problems in engineering, and also potentially in medicine.Read moreRead less
Flow-induced oscillation in flexible tubes: experimental and numerical investigation of mechanism and onset. We seek to understand when instability arises in flow over very deformable structures. This will help us to design highly flexible structures specifically either to avoid the danger of flow-induced oscillations, which may be damaging (cardiac surgery, sails, parachutes), or in other circumstances to take advantage of them as an innovative way involving no sliding-parts mechanisms to crea ....Flow-induced oscillation in flexible tubes: experimental and numerical investigation of mechanism and onset. We seek to understand when instability arises in flow over very deformable structures. This will help us to design highly flexible structures specifically either to avoid the danger of flow-induced oscillations, which may be damaging (cardiac surgery, sails, parachutes), or in other circumstances to take advantage of them as an innovative way involving no sliding-parts mechanisms to create vibration, or flow pulsation, or sound, or motion (as in swimming-pool cleaners). Confidence in designing with highly flexible tubes will allow minimal resource consumption in manufacture of products to transport fluids, and will allow design use of the flow limitation property, whereby such a tube can control flow-rate.Read moreRead less
Towards early detection of upper airway obstruction in children: investigation of autonomic control. This project focuses on the investigation of new indicators for early detection of upper airway obstruction (UAO)-which is a common sleep disorder in children. Failure to treat UAO can result in serious adverse outcomes including failure to thrive, neurocognitive deficits, developmental delay, behavioural disorders and cardiovascular disease. Thus, early treatment of UAO will significantly improv ....Towards early detection of upper airway obstruction in children: investigation of autonomic control. This project focuses on the investigation of new indicators for early detection of upper airway obstruction (UAO)-which is a common sleep disorder in children. Failure to treat UAO can result in serious adverse outcomes including failure to thrive, neurocognitive deficits, developmental delay, behavioural disorders and cardiovascular disease. Thus, early treatment of UAO will significantly improve quality of life for the child. Direct benefits to community health via reduced costs for medical treatment will also be a key outcome. The establishment of new diagnostic indicators will form the basis of new tools for identifying child sleep disorders and contribute to advancing Australia's international leading position in health technology. Read moreRead less
The Scale-up and Evaluation of a Novel Dense Gas Technology Platform for the Production of Particles for Aerosol Drug Delivery. This project provides a unique opportunity to develop an Australian-invented technology in particle engineering, enabling it to enter the international pharmaceutical market. This will enhance the growth of Australia's pharmaceutical research and development, and benefit the Australian pharmaceutical industry. The outcome will also contribute to improvements in the heal ....The Scale-up and Evaluation of a Novel Dense Gas Technology Platform for the Production of Particles for Aerosol Drug Delivery. This project provides a unique opportunity to develop an Australian-invented technology in particle engineering, enabling it to enter the international pharmaceutical market. This will enhance the growth of Australia's pharmaceutical research and development, and benefit the Australian pharmaceutical industry. The outcome will also contribute to improvements in the health and well-being of Australians. The research falls within the Designated National Research Priority of Frontier Technologies for Building and Transforming Australian Industries.Read moreRead less
Modulation of protein folding pathways: a new platform technology for molecular medicine. Misfolding of proteins is becoming recognised as a major cause of inherited disease. We propose to develop a chemical agent that will optimise the folding of alpha1-antitrypsin (AAT), misfolding of which gives rise to inheritable liver and lung disease. This agent will have potential application as a therapy for sufferers of AAT-misfolding disease and for improving the yield of AAT purified from human plasm ....Modulation of protein folding pathways: a new platform technology for molecular medicine. Misfolding of proteins is becoming recognised as a major cause of inherited disease. We propose to develop a chemical agent that will optimise the folding of alpha1-antitrypsin (AAT), misfolding of which gives rise to inheritable liver and lung disease. This agent will have potential application as a therapy for sufferers of AAT-misfolding disease and for improving the yield of AAT purified from human plasma, which is the current agent used to treat patients with AAT-misfolding disease.Read moreRead less
Bridging the gap between global mechanics and regional imaging in the lungs. The detailed mechanics of breathing are not well understood, due to a lack of regional lung measurement techniques. This project aims to develop a powerful analysis tool to image in vivo mechanical properties of the lungs. The expected outcome of this project is a novel platform for investigation and understanding of lung function, enabling information previously only available for the whole lung to be calculated for lo ....Bridging the gap between global mechanics and regional imaging in the lungs. The detailed mechanics of breathing are not well understood, due to a lack of regional lung measurement techniques. This project aims to develop a powerful analysis tool to image in vivo mechanical properties of the lungs. The expected outcome of this project is a novel platform for investigation and understanding of lung function, enabling information previously only available for the whole lung to be calculated for local lung regions within the body. The image analysis methods developed are intended to enable respiratory researchers to investigate lung function in unprecedented detail, leading to new insights into the workings of this complicated and vital organ. Read moreRead less
Hybrid imaging/modelling: A new paradigm for understanding the lung. Our lungs are essential to sustain our lives, yet the details of lung biomechanics are barely understood because the available tools, imaging, modelling and simulation have significant limitations. Imaging is largely limited to providing structural information; simulation is severely restricted by a lack of validation; and inverse modelling is critically hampered by a lack of spatially resolved inputs. The project’s multidiscip ....Hybrid imaging/modelling: A new paradigm for understanding the lung. Our lungs are essential to sustain our lives, yet the details of lung biomechanics are barely understood because the available tools, imaging, modelling and simulation have significant limitations. Imaging is largely limited to providing structural information; simulation is severely restricted by a lack of validation; and inverse modelling is critically hampered by a lack of spatially resolved inputs. The project’s multidisciplinary team is uniquely positioned to explore these problems through the hybridisation of world-leading functional lung imaging technology with state-of-the-art modelling. This project aims to provide, perhaps for the first time, the capacity to see details with the resolution of imaging, richness of modelling and reliability of the finest measurements.Read moreRead less