Peter J. Turner

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This paper describes an integrated Physiological Sensor Suite (PSS) based upon QUASAR's innovative non-invasive bioelectric sensor technologies that will provide, for the first time, a fully integrated, noninvasive methodology for physiological sensing. The PSS currently under development at QUASAR is a state-of-the-art multimodal array of sensors that,(More)
This paper describes a compact, lightweight and ultra-low power ambulatory wireless EEG system based upon QUASAR's innovative noninvasive bioelectric sensor technologies. The sensors operate through hair without skin preparation or conductive gels. Mechanical isolation built into the harness permits the recording of high quality EEG data during ambulation.(More)
This paper describes a wireless multi-channel system for zero-prep electroencephalogram (EEG) measurements in operational settings. The EEG sensors are based upon a novel hybrid (capacitive/resistive) bioelectrode technology that requires no modification to the skin’s outer layer. High impedance techniques developed for QUASAR’s capacitive electrocardiogram(More)
OBJECTIVE A method of cephalometric analysis is described in which cephalometric x-rays were scanned using a flat-bed scanner and transparency hood. Then the image was displayed on a computer monitor for point identification and subsequent cephalometric analysis using dedicated software. The reproducibility of point identification using this method was(More)
OBJECTIVE The purpose of this cross-sectional survey was to evaluate the psychosocial impact of tooth agenesis in children and to investigate the potential influence of gender, socioeconomic status, severity of tooth absence, and the number of retained primary teeth on their quality of life. MATERIALS AND METHODS A total of 86 children (36 male, 50(More)
Alien plant invaders significantly threaten native community diversity, although it is poorly understood whether invasion initiates a linear or non-linear loss of resident species. Where low abundances of an invader have little impact on native species diversity, then a threshold level may exist, above which native communities rapidly decline. Our aim was(More)
Plant invasions of natural communities are commonly associated with reduced species diversity and altered ecosystem structure and function. This study investigated the effects of invasion and management of the woody shrub Lantana camara (lantana) in wet sclerophyll forest on the south-east coast of Australia. The effects of L. camara invasion and management(More)
A clinical trial comparing a conventional adhesive, Concise, with a new fluoride-containing composite cement is described. The bond failure rate, plaque score, gingival health, and enamel decalcification were assessed for each material after a minimum period of 1 year. The preliminary results show no significant difference between the two materials for each(More)
A brain-computer interface is a device that uses signals recorded from the brain to directly control a computer. In the last few years, P300-based braincomputer interfaces (BCIs) have proven an effective and reliable means of communication for people with severe motor disabilities such as amyotrophic lateral sclerosis (ALS). Despite this fact, relatively(More)
In orthodontics, the two main uses of extra-oral forces are in distalizing upper teeth and providing anchorage in the treatment of Class I and Class II malocclusions. This article reviews the theoretical principles behind the use of headgear, outlines the types available, and identifies the most appropriate designs for particular clinical situations.(More)