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Probing cross modal interactions in the perception of object motion and self-motion. How the brain integrates information from the different senses is not yet understood. This project aims first, to uncover how the brain integrates sound and visual information when perceiving moving objects and second, to probe more complex sensory interactions between sound, vision, and our vestibular senses when perceiving self-motion. This project will expand Australia's knowledge base, strengthen collabora ....Probing cross modal interactions in the perception of object motion and self-motion. How the brain integrates information from the different senses is not yet understood. This project aims first, to uncover how the brain integrates sound and visual information when perceiving moving objects and second, to probe more complex sensory interactions between sound, vision, and our vestibular senses when perceiving self-motion. This project will expand Australia's knowledge base, strengthen collaborative ties between Australia and Japan, and provide unique training opportunities for Australian and Japanese students. Publication of research in top-ranking journals will further promote Australian science abroad. Results will lead to improvements in the design of human-machine interfaces in both industry and entertainment.Read moreRead less
Complex Motion Processing in Primate Visual Cortex. As we move through the world, a dynamic visual image is projected onto our retinas. The pattern of movement in the retinal image contains information about three-dimensional structure in the environment and the time of impending collisions. Our visual systems are expert at exploiting this information, enabling us to navigate through complex visual environments at a level far beyond the most sophisticated artificial systems. We plan to investiga ....Complex Motion Processing in Primate Visual Cortex. As we move through the world, a dynamic visual image is projected onto our retinas. The pattern of movement in the retinal image contains information about three-dimensional structure in the environment and the time of impending collisions. Our visual systems are expert at exploiting this information, enabling us to navigate through complex visual environments at a level far beyond the most sophisticated artificial systems. We plan to investigate complex motion processing in the primate brain by recording the responses of neurons in identified regions of the visual cortex of macaque monkeys to a range of behaviourally relevant motion stimuli.Read moreRead less
Stereoscopic Vision at Large Distances. This project measures the benefits of stereopsis, which is a perception of depth obtained from binocular vision, at distances of tens to hundreds of meters. Almost nothing is known of our stereoscopic abilities over this range and thus this is new and fundamental data about human vision. We will investigate how monocular and binocular information is combined at large distances; an issue relevant to sensor fusion, a central problem in neuroscience. The rese ....Stereoscopic Vision at Large Distances. This project measures the benefits of stereopsis, which is a perception of depth obtained from binocular vision, at distances of tens to hundreds of meters. Almost nothing is known of our stereoscopic abilities over this range and thus this is new and fundamental data about human vision. We will investigate how monocular and binocular information is combined at large distances; an issue relevant to sensor fusion, a central problem in neuroscience. The research is also critical for any tasks involving judgments over long distances including the recognition of distant targets and their relationships as well as the visual guidance of vehicles such as helicopters. It will also provide critical information to designers of binocular instruments.Read moreRead less
Cross-linking in free-radical polymerizations: kinetics and mechanical properties. Cross-linked polymer chains are joined together in a ?ladder? topology. This often occurs either deliberately or accidentally in industrial systems, and affects polymer properties. However, cross-linking mechanisms are poorly understood, and there are no general means of quantitatively controlling effects on mechanical properties. As a by-product from a previous IREX grant, a means was found to grow polymers with ....Cross-linking in free-radical polymerizations: kinetics and mechanical properties. Cross-linked polymer chains are joined together in a ?ladder? topology. This often occurs either deliberately or accidentally in industrial systems, and affects polymer properties. However, cross-linking mechanisms are poorly understood, and there are no general means of quantitatively controlling effects on mechanical properties. As a by-product from a previous IREX grant, a means was found to grow polymers with controlled cross-linking. This proposal exploits this method to synthesize polymers with different amounts of cross-linking, and to examine their formation mechanisms and mechanical properties. This has the potential of improving means of making rubber-based materials by polymer modification.Read moreRead less
The genetic and diagnostic relationship between motor control and Attention Deficit Hyperactivity Disorder. Children with Attention Deficit Hyperactivity Disorder (ADHD) often have comorbid Developmental Coordination Disorder (DCD). This project will utilise the expertise of leading researchers in Australia and the Netherlands to investigate the genetic and diagnostic relationship between these two disorders utilising a large sample of twins and their siblings. We will examine the neuropsych ....The genetic and diagnostic relationship between motor control and Attention Deficit Hyperactivity Disorder. Children with Attention Deficit Hyperactivity Disorder (ADHD) often have comorbid Developmental Coordination Disorder (DCD). This project will utilise the expertise of leading researchers in Australia and the Netherlands to investigate the genetic and diagnostic relationship between these two disorders utilising a large sample of twins and their siblings. We will examine the neuropsychological functioning in these groups of children in order to gain a better understanding of their genetic relationship. These findings will provide insight into the current DSM-IV classification of these disorders compared with other models used to investigate the relationship between poor motor coordination and ADHD.Read moreRead less
How, What and Who in Human Communication: Movement of Face and Voice. The aim of this project is to identify the essential characteristics of tone, affect, and identity from face and voice using a combination of signal processing, biological, and behavioural techniques in order to develop a comprehensive model of auditory-visual speech processing and communication. This research will significantly improve understanding of the basis of auditory-visual perception and production in tonal languages ....How, What and Who in Human Communication: Movement of Face and Voice. The aim of this project is to identify the essential characteristics of tone, affect, and identity from face and voice using a combination of signal processing, biological, and behavioural techniques in order to develop a comprehensive model of auditory-visual speech processing and communication. This research will significantly improve understanding of the basis of auditory-visual perception and production in tonal languages and in affective communication, facilitate links between neurophysiological processes and auditory-visual speech processing; and contribute to applications in automatic person recognition, automatic speech recognition, text-to-speech systems, and talking head aids for the hearing impaired.Read moreRead less
Relationship of the functional architecture of the mammalian brain to its microcircuitry. The project seeks to understand a very fundamental issue in neuroscience: how the connectivity and architecture of the cortex are related to the functions of neurones in that area? This will be investigated by imaging the surface of the visual cortex of anaesthetised cats and monkeys as special visual patterns are shown to the eye/s. The overall picture gained of the active and inactive cortical areas will ....Relationship of the functional architecture of the mammalian brain to its microcircuitry. The project seeks to understand a very fundamental issue in neuroscience: how the connectivity and architecture of the cortex are related to the functions of neurones in that area? This will be investigated by imaging the surface of the visual cortex of anaesthetised cats and monkeys as special visual patterns are shown to the eye/s. The overall picture gained of the active and inactive cortical areas will be related to the properties of neurones in those areas and to those of individual input and output fibres. An optical imaging equipment will be acquired in 2004 using a recently awarded LIEF grant to the CI.Read moreRead less
Learning and memory in the honeybee: Task-dependent brain development. We wish to explore whether the development of specific brain regions in young bees depends upon the nature of the learning task in which they are engaged. We will examine tasks that involve two sensory modalities: olfaction and vision, both of which are important to successful foraging. The relative ease with which bees can be trained, and their nervous systems accessed, make them a very attractive subject in which to study f ....Learning and memory in the honeybee: Task-dependent brain development. We wish to explore whether the development of specific brain regions in young bees depends upon the nature of the learning task in which they are engaged. We will examine tasks that involve two sensory modalities: olfaction and vision, both of which are important to successful foraging. The relative ease with which bees can be trained, and their nervous systems accessed, make them a very attractive subject in which to study fundamental principles of learning and memory that may span a variety of organisms.Read moreRead less
Reversible Addition Fragmentation Chain Transfer (RAFT) Free Radical Copolymerizations of Various Monomers. The proposed project will investigate the structure and properties of statistical copolymers prepared via living free radical polymerization. We will study the characteristics of a wide variety of Reversible Addition Fragmentation Chain Transfer (RAFT) copolymerizations using a range of monomers, including those interesting for biomedical and material science applications. We expect to gai ....Reversible Addition Fragmentation Chain Transfer (RAFT) Free Radical Copolymerizations of Various Monomers. The proposed project will investigate the structure and properties of statistical copolymers prepared via living free radical polymerization. We will study the characteristics of a wide variety of Reversible Addition Fragmentation Chain Transfer (RAFT) copolymerizations using a range of monomers, including those interesting for biomedical and material science applications. We expect to gain a deeper understanding of the influence of the RAFT process on the kinetics and mechanism of copolymerization and the properties of the resulting polymers in order to tailor specific polymer materials for biomedial applications.Read moreRead less
A unified theory of performance in absolute identification tasks. The ability to identify stimuli is fundamentally important in human cognition and is studied in absolute identification tasks, where people must identify one out of a number of stimuli, varying on a single dimension, with an appropriate label. A remarkable finding is that people cannot reliably identify more than about seven different stimuli. This limit imposes severe practical restrictions on our ability to categorise stimuli an ....A unified theory of performance in absolute identification tasks. The ability to identify stimuli is fundamentally important in human cognition and is studied in absolute identification tasks, where people must identify one out of a number of stimuli, varying on a single dimension, with an appropriate label. A remarkable finding is that people cannot reliably identify more than about seven different stimuli. This limit imposes severe practical restrictions on our ability to categorise stimuli and constitutes a perplexing problem for cognitive theory. This project involves an international collaborative effort by five leading researchers in mathematical psychology to develop a comprehensive, integrative model of human performance in absolute identification tasks.
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