Geographic routing with cooperative relaying and leapfrogging in wireless sensor networks

A novel geographic routing protocol for multi-hop wireless sensor networks is presented. It exploits the broadcast nature of the wireless channel to enable on-demand cooperative relaying and leapfrogging for circumventing weak radio links. In order to achieve energy efficiency, a metric is introduced for next-hop selection that takes into account information on the residual battery energy, the geographical position of the sensor nodes, and the channel quality of the involved radio links when available. Performance results show that the completely decentralized protocol offers significant benefits by reducing the number of (re)transmissions required to reach the destination. This translates into network-wide energy savings that extend the network lifetime.

The movement ABC: a cross-cultural comparison of preschool children from Hong Kong, Taiwan and the USA

The purpose of this study was to evaluate the suitability of the Movement Assessment Battery for Children (M-ABC) for use in Greater China. Chinese children numbering 255 between the ages of 4 and 6 from Hong Kong and 544 from Taiwan were tested individually on the standardized test contained within the M-ABC. Data from these 799 children were compared to that presented in the test manual for the 493 children of the same age comprising the United States standardization sample. Both within-culture and cross-cultural differences were statistically significant when all items of the M-ABC were examined simultaneously, but effect sizes were too low to be considered meaningful. However, descriptive analysis of the cut-off scores used for impairment detection on the test suggested that adjustments to some items would be desirable for these particular Chinese populations.

An exploration of sense of community, part 3: dimensions and predictors of psychological sense of community in geographical communities

Within the discipline of community psychology there remains considerable debate as to the latent structure of psychological sense of community (PSOC). One of the few theoretical discussions is that of McMillan and Chavis (1986), who hypothesized four dimensions: Belonging; Fulfillment of Needs; Influence; and Shared Connections. Discussion has also emerged in the literature regarding the role of identification within PSOC. However few studies have empirically investigated the role of identification in PSOC. The current study explored PSOC in a sample of residents of rural, regional and urban geographical communities (N = 669). In an endeavor to clarify the underlying dimensions of PSOC, a test battery included several measures of PSOC as well as measures of identification with the community. The study also examined the role of demographic factors in predicting PSOC. Results provided support for McMillan and Chavis' (1986) four dimensions of PSOC. Further, a fifth dimension emerged, that of Conscious Identification, suggesting that identification is separate to existing dimensions of PSOC. The demographic factors significantly associated with PSOC were type of region, with rural participants displaying higher PSOC than their urban counterparts; participation in local organizations; having children; and a vision of one’s neighborhood as broader than just a street or block. These results, and the implications for PSOC research, are discussed.

Torts

Third edition of a text for university students providing a basic coverage of the principles of torts law, first published 1997. Covers all aspects of torts law including battery, assault, false imprisonment, trespass, negligence and statutory duty. Designed to be used with 'Torts: Cases and Commentary' or with any other torts law casebook. Includes charts, diagrams, references and index. New edition contains recent High Courts decisions that have changed the law of Torts in Australia. Editor is a senior lecturer at the School of Law, Deakin University.

Does childhood motor skill proficiency predict adolescent fitness?

Purpose: To determine whether childhood fundamental motor skill proficiency predicts subsequent adolescent cardiorespiratory fitness.

Methods: In 2000, children's proficiency in a battery of skills was assessed as part of an elementary school-based intervention. Participants were followed up during 2006/2007 as part of the Physical Activity and Skills Study, and cardiorespiratory fitness was measured using the Multistage Fitness Test. Linear regression was used to examine the relationship between childhood fundamental motor skill proficiency and adolescent cardiorespiratory fitness controlling for gender. Composite object control (kick, catch, throw) and locomotor skill (hop, side gallop, vertical jump) were constructed for analysis. A separate linear regression examined the ability of the sprint run to predict cardiorespiratory fitness.

Results: Of the 928 original intervention participants, 481 were in 28 schools, 276 (57%) of whom were assessed. Two hundred and forty-four students (88.4%) completed the fitness test. One hundred and twenty-seven were females (52.1%), 60.1% of whom were in grade 10 and 39.0% were in grade 11. As children, almost all 244 completed each motor assessments, except for the sprint run (n = 154, 55.8%). The mean composite skill score in 2000 was 17.7 (SD 5.1). In 2006/2007, the mean number of laps on the Multistage Fitness Test was 50.5 (SD 24.4). Object control proficiency in childhood, adjusting for gender (P = 0.000), was associated with adolescent cardiorespiratory fitness (P = 0.012), accounting for 26% of fitness variation.

Conclusion: Children with good object control skills are more likely to become fit adolescents. Fundamental motor skill development in childhood may be an important component of interventions aiming to promote long-term fitness.

A new H.E.L.P kit for teaching practical AC electronics to undergraduate distance students

An important part of educating students in electronics and electrical engineering is laboratory practicals. Providing effective practical experience to students by distance education has always been a significant challenge to the engineering educator. Deakin University has for many years taught practicals in basic digital electronics to off-campus students by means of a kit. The same students have performed related exercises in analogue electronics, which require generating and measuring AC signals, by means of either software simulations or on-campus attendance at lab classes. This year, for the first time, off-campus students are being provided with a new kit, which contains a low-cost, battery-powered AC signal generator, and an interface that allows a PC to be used as an oscilloscope. This kit allows the off-campus student further flexibility in learning basic electronics.

Quality of life of Australian family carers : implications for research, policy and practice

Abstract As part of an international,multicentered project, the burden of care, health, and subjective well-being experienced by select Australian family carers supporting a relative with disability at home were investigated. Some 448 family carers residing in New South Wales and Tasmania completed a battery of instruments, including a self-report demographic survey, the Family Caregiver Burden Inventory, the General Health Questionnaire, and the Personal Wellbeing Index. Respondents were predominantly females (mean
age = 48 years), married, and supporting a son or daughter with an intellectual disability (mean age = 18 years). Although caring for their family member was not perceived to be a burden, respondents reported notable limitations on their social networks and social activities. They reported higher levels of unemployment than would be expected for the general population and were over represented in lower income groups. They reported seriously low levels of mental health and personal well-being when compared with the general population. The findings revealed that this group of family carers were at high risk of social and economic disadvantage and at high risk of mental health challenges. Social policy makers and service providers should take these factors into account, both in the interests of promoting the health and well-being of the carers and considering the long-term needs of family members with disability who rely on family carers for daily support when designing services.

Do governments lead or lag in fighting crime?

We examine the Granger causal relationship between police strength and a variety of different types of crime for South Australia. We find that with the exception of assault and homicide in the long run, the crime rate and police strength are neutral.

The feasibility of a sustainable energy, driver-only electric commuter vehicle for New Zealand

This paper investigates whether low technology driver-only, battery electric commuter vehicles are feasible for New Zealand. Personal passenger transport faces several challenges in the coming decades: depletion of cheap oil reserves, increasing congestion, localised pollution, the need for reduced carbon emissions and the long term goal of sustainability. One way of solving some of these problems could be to introduce low cost, comfortable, energy efficient, driver-only electric vehicles. These would still give the driver a weatherproof, safe and comfortable means of commuting, but at a fraction of the energy and running costs of conventional petrol/diesel cars. To help assess their viability, the performance and energy use of the E-POD electric commuter vehicle is used as a benchmark. The work shows that such a vehicle could be made cheaply, using readily available technology with a range of 180km and a top speed of over 90km/h. The chassis could be made from natural fibre composite materials that might reduce significantly the embedded energy required for its manufacture. The electricity taken from the grid to charge the batteries could be replaced by electricity generated from grid connected photovoltaic panels mounted on the garage roof of the vehicle owner.

Mothers' transition back to work and infants' transition to child care : does work-based child care make a difference?

The overall aim in this study was twofold: to compare the use of work-based (WB) and non-work-based (NWB) child care on the transition back to the workplace for women after a period of maternity leave, and on the transition into child care for the infants of these women. Thirty-five mothers with infants in WB centres and 44 mothers with infants in NWB centres completed a battery of questionnaires, retrospectively, in relation to their first four weeks of resuming work and their infant’s transition into child care. We first explored whether the mothers of infants in WB centres were less stressed and anxious
about separating from their infant, were more satisfied with their child care, and whether they felt more productive and supported at work than mothers of infants in NWB child
care centres. Our findings revealed no differences between mothers using WB centres and NWB centres in their transition to work. In exploring whether infants placed in WB centres settled faster and more easily than infants placed in NWB centres, the findings, once again, revealed no differences in the infant’s affective states at child care and maintenance of their routines, such that all infants were equally settled and happy irrespective of the type of care used. The theoretical and practical implications of our findings are discussed.

Development and application of electroanalytical field-based chemical monitoring systems

The development and application of a novel combination of electrochemical techniques and computerized field-based battery-operated instrumentation is investigated. Low-power complementary metal oxide semiconductor technology has been utilized for the development of the field data acquisition systems and the instrumental performance of the complete analytical system is critically evaluated.

Mnemonia country

Wood, DVD player and screen, spy-hole, 500 watt interrogation light, ergonomic interrogation chair, windscreen wiper motor and car battery 2x3x1.6m. Includes the film rendition.

Peak to average power ratio analysis for LTE systems

The 3rd generation partnership project (3GPP) long term evolution (LTE) standard uses single carrier frequency division multiple access (SCFDMA) scheme for the uplink transmissions and orthogonal frequency division multiplexing access (OFDMA) in downlink. SCFDMA uses DFT spreading prior to OFDMA modulation to map the signal from each user to a subset of the available subcarriers i.e., single carrier modulation. The efficiency of a power amplifier is determined by the peak to average power ratio (PAPR) of the modulated signal. In this paper, we analyze the PAPR in 3GPP LTE systems using root raised cosine based filter. Simulation results show that the SCFDMA subcarrier mapping has a significantly lower PAPR compared to OFDMA. Also comparing the three forms of SCFDMA subcarrier mapping, results show that interleave FDMA (IFDMA) subcarrier mapping with proposed root raised cosine filter reduced PAPR significantly than localized FDMA (LFDMA) and distributed (DFDMA) mapping. This improves its radio frequency (RF) power amplifier efficiency and also the mean power output from a battery driven mobile terminal.

A study on look-ahead control and energy management strategies in hybrid electric vehicles

Fuel efficiency in a hybrid electric vehicle requires a fine balance between usage of combustion engine and battery power. Information about the geometry of the road and traffic ahead can have a great impact on optimized control and the power split between the main parts of a hybrid electric vehicle. This paper provides a survey on the existing methods of control and energy management emphasizing on those that consider the look-ahead road situation and trajectory information. Then it presents the future trends in the control and energy management of hybrid electric vehicles.

The zwitterion effect in ionic liquids : towards practical rechargeable lithium-metal batteries

Practical lithium-metal batteries are the ultimate goal of battery researchers. The addition of a zwitterionic compound (see Figure) to an ionic liquid electrolyte doped with a lithium salt results in a 100% enhancement of the current densities achieved in the cycling of a lithium-metal cell. This phenomenon arises due to increased lithium-ion mobility or a reduced solid electrolyte interphase layer resistance.