The problem of acoustic backscattering from suspended particulates in the near field of a piston source is examined. A monostatic configuration is used, with the transducer acting as a transceiver. Predictions for the range dependence of the backscatter signal are calculated, and formulated into a nondimensional general form. To compare predictions with observations, a series of laboratory experiments, using a number of transducers insonifying varying homogeneous suspensions, has been conducted. To first order the outcome shows good agreement between prediction and observation.

Bridging the Gap, a South Australian research based program, was designed to introduce the concepts of modern technology and some Internet skills to people over 55. Target populations included people in rural areas, those with a first language other than English and people who were frail or had a disability. Informal, interactive, hands-on Carol Irizarry, PhD, a Canadian, is Senior Lecturer at ). She has conducted research with state and federal funding into how technology can contribute to older people's quality of life.Andrew Downing, BSc, BE (Hons.), is Foundation Professor of Engineering (Biomedical) and Dean ). He has encouraged engineering to develop assistive technology and respond to older people's needs. He conducts research in the fields of disability and gerontechnology. ). She is currently undertaking a PhD investigating how technology can assist older people to age successfully. As a social worker, her interest is in aged care and community development.sessions were developed which demonstrated the concepts underpinning modern computer-based devices and their applications in society. Major findings indicated that most participants identified feeling less anxious and more confident about using modern technology after the program and that they were using a new range of computer-based skills.

Findings suggest that the family and friends of older people play an important role in identifying, selecting and learning to use mobile communication technologies. The safety and emergency capabilities of mobile communications technologies were more important than having functions that could assist with independent living.

A survey of 312 older people was conducted to ascertain the extent to which they use modern devices, and their attitudes towards modern technology. Although respondents expressed interest in new technology and confidence in learning to use modern devices, few owned or used a computer. Based on these findings, the “Seniors‐On‐Line” program was established with the aim of providing older people with the opportunity to enhance their lives through the use of computers. Participants were aged from 55 to 89. Teaching methods address the particular learning needs of this age group: egalitarian leadership, encouragement of questions, classes consisting of same age students, and freedom to work at one's own pace. Of a total of 369 participants, 98% have completed the course.

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