Greg A. Whelan

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We are developing techniques for safeguarding the remote operation of lunar rovers. This paper presents two complementary techniques: One, based on stereo vision, evaluates the traversability of paths the rover could follow, and produces preferences for steering directions. The other, based on laser proximity sensing, looks for hazards immediately in front(More)
BACKGROUND Study of the course of substance misuse and daily tobacco use in first-episode psychosis may enhance detection and treatment of these substance-related problems. METHODS This 15-month follow-up study examined the course of substance misuse and daily tobacco use in 103 individuals treated for first-episode psychosis. RESULTS Three-quarters(More)
OBJECTIVE To investigate the patterns and predictors of substance use disorders (SUD) and daily tobacco use in first-episode psychosis (FEP). METHOD In this study, consecutive admissions of 126 patients with an initial presentation for FEP were recruited from three psychiatric services. Each patient was assessed with a comprehensive assessment package in(More)
We present an implemented algorithm f o r a distributed team of autonomous mobile robots to search for an object. When one robot finds i t , they all gather around it, and then manipulate (“rescue”) i t . The algorithm exploits parallelism, with all robots searching concurrently, and also teamwork, because the manipulation is performed cooperatively. Our(More)
The purpose of the present set of studies was to develop a new primate model of focal ischemia with reperfusion for long-term functional assessment in the common marmoset. Initially, the cerebral vascular anatomy of the marmoset was interrogated by Araldite-cast and ink-perfusion methods to determine the feasibility of an intravascular surgical approach.(More)
AIM To develop and evaluate a brief intervention for reducing risk behaviours associated with HCV transmission in injecting drug users (IDU). DESIGN Randomized controlled trial of an individually tailored brief behavioural intervention (BBI) (experimental) versus a standardized educational intervention (control). SETTING Specialist drug treatment(More)
Two pharmacotherapies recently introduced in Australia, acamprosate and naltrexone, provide a major advance in the treatment of severe alcohol dependence, a common condition leading to a considerable burden of illness and major costs to the community. Acamprosate and naltrexone reduce alcohol intake, and increase the likelihood and prolong the duration of(More)
The history and the lessons learned from hypohidrotic ectodermal dysplasia (HED) may serve as an example for the unraveling of the cause and pathogenesis of other ectodermal dysplasia syndromes by demonstrating that phenotypically identical syndromes (HED) can be caused by mutations in different genes (EDA, EDAR, EDARADD), that mutations in the same gene(More)
The study aimed to identify the range of buprenorphine doses required to comfortably alleviate symptoms in patients undergoing inpatient heroin withdrawal using a symptom-triggered titration dosing regime, and to identify the patient characteristics that impact upon the buprenorphine dose requirements. The study was conducted in two Australian inpatient(More)