Body build : its influence on anthropometric measurements, fat distribution, body composition and carbohydrate metabolism

Examines the interrelationships between body build and body composition and carbohydrate and lipid metabolism in healthy young men and women. Results indicate that in women a low relative sitting height may be an early marker of susceptibility to abdominal obesity and its consequences, non insulin dependent diabetes and coronary heart disease.

Body weight and weight loss : are health messages reaching their target?

Objective: To investigate lay peoples’ knowledge of health risks of overweight, accuracy of self-perception of body weight and perceived benefits of weight loss. Method: A nine item questionnaire was administered to a cross sectional survey of adults in metropolitan shopping centres, height and weight were measured. Results: Two hundred and nine (57% female) adults completed the survey. Thirty eight percent had a healthy BMI (18.5-24.9), 38% were overweight (BMI 25-29.9) and a further 22% were obese (BMI>30). However only 46% perceived themselves ‘overweight’, 50% considered themselves ‘just about right’ and 4% considered themselves ‘underweight’. Of those with a BMI of 25 or greater 28% considered their weight ‘just about right’. Over 80% thought ‘being overweight’ was ‘likely’ or ‘very likely’ to be a risk factor for cardiovascular disease, hypertension, diabetes and stroke; however 20% of overweight or obese individuals did not think their health would improve if they lost weight. Conclusion: A significant proportion of overweight or obese individuals do not accurately perceive their body weight and do not recognise the health advantages of weight loss despite recognising excess body weight as a risk factor for chronic diseases. Implications: Increasing the awareness of an individual’s BMI and promoting the benefits of modest weight loss maybe two underutilized strategies for population level weight control.

A randomised trial of surgical, medical and expectant management of first trimester spontaneous miscarriage

Background: Medical management and expectant care have been considered possible alternatives to surgical evacuation of the uterus for first trimester spontaneous miscarriage in recent years.

Aim: To compare the effectiveness and safety of medical and expectant management with surgical management for first trimester incomplete or inevitable miscarriage.

Methods: Forty women were recruited following diagnosis of incomplete or inevitable miscarriage, and randomised to surgical, medical or expectant care via an off-site, computerised enrolment system. The primary outcome was the effectiveness of medical (vaginal misoprostol) and expectant management relative to surgical evacuation, assessed at 10–14 days and 8 weeks post-recruitment. Infection, pain, bleeding, anxiety, depression, physical and emotional recovery were assessed also. Analysis was by intention-to-treat.

Results: Effectiveness at 8 weeks was lower for medical (80.0%) and expectant (78.6%) than for surgical management (100.0%). Two women in the medical group had confirmed infections. Bleeding lasted longer in the expectant group than in the surgical group. There were no significant differences in pain, physical recovery, anxiety or depression between the groups. 54.6%, 42.9% and 57.1% of the surgical, medical and expectant groups respectively would opt for the same treatment again.

Conclusion: Expectant care appears to be sufficiently safe and effective to be offered as an option for women. Medical management might carry a higher risk of infection than surgical or expectant care.

School and community partnerships in socially critical environmental education : research as environmental activism

Through a critical ethnography of a school and community, this study identifies and describes-in-action an approach to environmental education that supports the socially critical aspirations of many contemporary environmental education activists and examines its fate in the policy context of educational restructuring.  The study provides a critical analysis and exploration of environmental education and environmental activism within the context of social change.

Research capacity implications for government, universities and disciplines from research into Australian PhD theses and their graduates’ scholarly, professional and community impacts

The authors (with colleagues) have conducted research into Australian doctoral education for over a decade. Two recent projects have produced as part of their outcomes: a database coded by discipline of all Australian PhD theses (dissertations) from 1987–2006. This paper commences with an overview of this work in terms of its purposes, research methods and outcomes. It is contextualized in terms of the current Australian and international debates about the nature, substance and impact of doctoral education on nations, societies, communities and economies. The paper presents some analyses of trends in the 1987–2006 Australian PhD theses. The period 1987-2006 covers several major changes in university education in Australia from the impact of the establishment of the Unified National System in the early 1990s, through the implementation of the Research Training Scheme (RTS) from 2001, the deliberations and demise of the Research Quality Framework (RQF), the rise of Excellence in Research Australia (ERA), through to the review of research training and the research workforce in Australian universities by the House of Representatives. The paper presents and tabulates a variety of trends from the bibliometric and bibliographic data, in particular those relating to the ebb and flow of PhDs in particular disciplines. The implications for national, institutional and disciplinary planners and policymakers with interests in the development and sustainability of research capacity are discussed.

Relationships between measures of fitness, physical activity, body composition and vascular function in children

Background : The prevalence of obesity and physical inactivity in Western countries has increased rapidly. Both are modifiable risk factors for cardiovascular disease. Atherosclerosis begins in childhood and endothelial dysfunction is its earliest detectable manifestation.

Methods : We assessed flow-mediated dilation (FMD) in 129 children (75 female; 10.3 + 0.3 yrs; 54 male; 10.4; 0.3 yrs). FMD was normalised for differences in the eliciting shear rate stimulus between subjects (SR_AUC). Fitness was assessed as peak oxygen uptake during an incremental treadmill exercise test (VO₂peak). Body composition was measured using a dual-energy X-ray absorptiometry (DEXA) scan. Physical activity (PA) was assessed using Actigraph accelerometers. The cohort was split into tertiles according to FMD% and also FMD% corrected for SR_AUC to gain insight into the determinants of vascular function.

Results : Across the cohort, significant correlations were observed between FMD%/SR_AUC and DEXA percentage fat (r = −0.23, p = 0.009) and percentage lean mass (r = 0.21, p = 0.008), and also with PA performed at moderate-to-high intensity (r = 0.363, p = 0.001). For children in the lowest FMD%/SR_AUC tertile, a stronger relationship with all PA measures was observed, particularly with high intensity PA (r = 0.572, P = 0.003). Regression analysis revealed that high intensity PA was the only predictor of impaired FMD%/SR_AUC.

Conclusions : These data suggest that traditional risk factors for CHD in adult populations impact upon vascular function in young people. Furthermore, it appears that individuals with impaired FMD may benefit from performing high intensity PA, whereas no relationships exist between FMD and lower intensities of PA or between PA and FMD in those subjects who possess preserved vascular function a priori.

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.

Perceptions of representatives of public, private, and community sector institutions of the barriers and enablers for physically active transport

Active transport bridges many shared concerns in the public health and transport sectors. To positively affect opportunities for active transport, public health and transport professionals are engaging with other sectors, including urban planning, housing, recreation, retail, education, and employer groups. A first step in such inter-sectoral collaboration is to understand the perceptions of key players in all of these sectors. This paper describes the results of structured interviews with senior and middle-level administrators from public, private, and community groups in a rapidly developing region in Queensland, Australia, to assess the perceived barriers and enablers to active transport. Key themes emerged relating to infrastructure delivery, public transport services, walk- and cycle-friendly community attributes, political leadership and government coordination, and societal travel norms and culture. There were also themes relating to limits due to resources and limited relevant technical expertise, institutional and practitioner cultures, and agencies not identifying with their roles in active transport. Policies and cross-government initiatives were seen to hold promise, including economic incentives and built environment guidelines, campaigns targeting public attitudes and opinions, and community participation in policy-making. These elements are potential keys to positively promoting comprehensive active transport initiatives among gatekeepers and leaders across different sectors.

Wireless sensor networks for in-situ image validation for water and nutrient management

Water and Nitrogen (N) are critical inputs for crop production. Remote sensing data collected from multiple scales, including ground-based, aerial, and satellite, can be used for the formulation of an efficient and cost effective algorithm for the detection of N and water stress. Formulation and validation of such techniques require continuous acquisition of ground based spectral data over the canopy enabling field measurements to coincide exactly with aerial and satellite observations. In this context, a wireless sensor in situ network was developed and this paper describes the results of the first phase of the experiment along with the details of sensor development and instrumentation set up. The sensor network was established based on different spatial sampling strategies and each sensor collected spectral data in seven narrow wavebands (470, 550, 670, 700, 720, 750, 790 nm) critical for monitoring crop growth. Spectral measurements recorded at required intervals (up to 30 seconds) were relayed through a multi-hop wireless network to a base computer at the field site. These data were then accessed by the remote sensing centre computing system through broad band internet. Comparison of the data from the WSN and an industry standard ground based hyperspectral radiometer indicated that there were no significant differences in the spectral measurements for all the wavebands except for 790nm. Combining sensor and wireless technologies provides a robust means of aerial and satellite data calibration and an enhanced understanding of issues of variations in the scale for the effective water and nutrient management in wheat.

Body image and self-esteem across age and gender : a short-term longitudinal study

This study examined the relationship between body image and self-esteem across time and age for men and women. Participants were 150 men and 239 women aged between 20 and 86 years (M=59.73), recruited from the general population in Australia. They completed a questionnaire assessing self-esteem, body dissatisfaction, body importance, and a range of other domains of life satisfaction at baseline and 2 years later. Cross-sectionally, we found that higher self-esteem was associated with lower body dissatisfaction, but there was no consistent relationship between these variables across time for age and
gender. Women were more dissatisfied with their bodies than men; yet, men placed greater importance on their appearance than women, and also reported high levels of body dissatisfaction.

The role of partners in shaping the body image and body change strategies of adult men : partners and male body image

The current study examined the relationship between perceived messages about the bodies of adult men from their sexual partners and the actual body image of these men. Interviews were conducted among 38 middle-aged men. Feedback from partners was generally complimentary, and the men were generally positive about their body image. Partners were seen to be more focused on a healthy body rather than a physically attractive body. The implications of these findings for better understanding the social influence on adult men to obtain a healthy body weight are discussed.

Psychosocial correlates of body image and body change behaviors among Malaysian adolescent boys and girls

This study used a psychosocial framework to investigate the relationships between BMI, body dissatisfaction, body change behaviors and mental health/behavioral problems amongst a sample of 513 Malay, Indian and Chinese adolescent boys and girls in Malaysia who completed questionnaires assessing these variables. Expected gender differences were not found in relation to body dissatisfaction or engagement in strategies to increase weight, but boys reported greater engagement in strategies to increase muscles. Relationships between body dissatisfaction and engagement in body change behaviors and mental health/behavioral problems varied across race and gender. These findings suggest that the psychosocial framework is a useful way to conceptualise body dissatisfaction and related behaviors, and that caution should be exercised in generalising findings across gender and culture.