Adolescent alcohol-use trajectories in the transition from high school

A cohort of 3300 students from high schools across Victoria, Australia, were surveyed regarding their patterns of alcohol consumption from mid-1993 to 1995. The first wave of data was collected halfway through the students' final year of school (year 12). Students were then resurveyed 3 months following school completion and on two subsequent occasions, each separated by 6-month intervals. Analysis of the four waves of data indicated that five longitudinal patterns (trajectories) characterized temporal trends in male and female alcohol use through the transition from high school. Stable non-use trajectories were evident for 17% of males and 16% of females. Trajectories of less than weekly use characterized 45% of females and 46% of males, and showed little tendency to escalate toward harmful use. Among those using alcohol on a weekly or more frequent basis in high school, with few exceptions, use continued with at least the same frequency, but the quantity of alcohol consumed tended to escalate over time toward harmful levels. Overall, findings indicate that patterns of alcohol use tend to be stable over time, and more frequent alcohol use during the final year of high school tends to precede potentially harmful alcohol use following high school. Encouraging those high school students who consume alcohol once per week or more often to use alcohol on a less than weekly basis may be a valuable yet neglected harm minimization strategy.

Stability of television viewing and electronic game/computer use in a prospective cohort study of Australian children: relationship with body mass index

Background
While much cross-sectional data is available, there have been few longitudinal investigations of patterns of electronic media use in children. Further, the possibility of a bi-directional relationship between electronic media use and body mass index in children has not been considered. This study aimed to describe longitudinal patterns of television viewing and electronic game/computer use, and investigate relationships with body mass index (BMI).
Methods
This prospective cohort study was conducted in elementary schools in Victoria, Australia. 1278 children aged 5–10 years at baseline and 8–13 years at follow-up had their BMI calculated, from measured height and weight, and transformed to z-scores based on US 2000 growth data. Weight status (non-overweight, overweight and obese) was based on international BMI cut-off points. Weekly television viewing and electronic game/computer use were reported by parents, these were summed to generate total weekly screen time. Children were classified as meeting electronic media use guidelines if their total screen time was ≤14 hrs/wk.
Results
Electronic media use increased over the course of the study; 40% met guidelines at baseline but only 18% three years later. Television viewing and electronic game/computer use tracked moderately and total screen time was positively associated with adiposity cross-sectionally. While weaker relationships with adiposity were observed longitudinally, baseline z-BMI and weight status were positively associated with follow-up screen time and baseline screen time was positively associated with z-BMI and weight status at follow-up. Children who did not meet guidelines at baseline had significantly higher z-BMI and were more likely to be classified as overweight/obese at follow-up.

Conclusion
Electronic media use in Australian elementary school children is high, increases with age and tracks over time. There appears to be a bi-directional association suggesting that interventions targeting reductions in either screen time or adiposity may have a positive effect on both screen time and adiposity.

Atmos (piano and guitar)

Atmos (Piano and Guitar) is a short instrumental with piano and guitar.

Fiber-specific responses of muscle glycogen repletion in fasted rats physically active during recovery from high-intensity physical exertion

Mild physical activity performed immediately after a bout of intense exercise in fasting humans results in net glycogen breakdown in their slow oxidative (SO) muscle fibers and glycogen repletion in their fast twitch (FT) fibers. Because several animal species carry a low proportion of SO fibers, it is unclear whether they can also replenish glycogen in their FT fibers under these conditions. Given that most skeletal muscles in rats are poor in SO fibers (<5%), this issue was examined using groups of 24-h fasted Wistar rats (n = 10) that swam for 3 min at high intensity with a 10% weight followed by either a 60-min rest (passive recovery, PR) or a 30-min swim with a 0.5% weight (active recovery, AR) preceding a 30-min rest. The 3-min sprint caused 61–79% glycogen fall across the muscles examined, but not in the soleus (SOL). Glycogen repletion during AR without food was similar to PR in the white gastrocnemius (WG), where glycogen increased by 71%, and less than PR in both the red and mixed gastrocnemius (RG, MG). Glycogen fell by 26% during AR in the SOL. Following AR, glycogen increased by 36%, 87%, and 37% in the SOL, RG, and MG, respectively, and this was accompanied by the sustained activation of glycogen synthase and inhibition of glycogen phosphorylase in the RG and MG. These results suggest that mammals with a low proportion of SO fibers can also replenish the glycogen stores of their FT fibers under extreme conditions combining physical activity and fasting.

Stanley Melbourne Bruce in London, 1938-41

This article examines Stanley Melbourne Bruce's role as Australian high commissioner in London during the approach to the Second World War and the European War from 1939 to 1941. It argues that Bruce in this period was an influential high commissioner who strongly influenced Australian foreign policy and exercised some influence, albeit with limitations, on the British government. After 1933, Bruce had transformed the office of Australian high commissioner in London from a largely commercial position into one with real diplomatic influence. In the approach to war, Bruce tended to bolster the policy of appeasement on which the Chamberlain government was already decided and in the Phoney War his cautious arguments contributed to the delay of the Allied intervention in Norway. With the accession of Winston Churchill to the prime ministership in May 1940, Bruce lost some of the influence he had had with Neville Chamberlain and he was on the losing side of the argument inside the British Cabinet about the possibility of a negotiated peace in May–June 1940. Despite the limitations of his personal relationship with Churchill, he was nonetheless an influential voice with other British ministers and senior officials and with the US ambassador in London and key members of the Roosevelt administration. This equipped him to play an effective part in the emerging Anglo-American alliance and issues of post-war international reconstruction.

Atomic scale investigation of solutes and precipitates in high strength steels

Two steels, ferritic, high strength with interphase precipitation and nano-bainitic, were used to show the advances in and application of atom probe. The coexistence of the nano-scale, interphase Nb-Mo-C clusters and stoichiometric MC nano particles was found in the high strength steel after thermomechanical processing. Moreover, the segregation of carbon at different heterogeneous sites such as grain boundary that reduces the solute element available for fine precipitation was observed. The APT study of the solutes redistribution between the retained austenite and bainitic ferrite in the nano-bainitic steel revealed: (i) the presence of two types of the retained austenite with higher and lower carbon content and (ii) segregation of carbon at the local defects such as dislocations in the bainitic ferrite during the isothermal hold.

Recommendations for and compliance with social restrictions during implementation of school closures in the early phase of the influenza A (H1N1) 2009 outbreak in Melbourne, Australia

Background Localized reactive school and classroom closures were implemented as part of a suite of pandemic containment measures during the initial response to influenza A (H1N1) 2009 in Melbourne, Australia. Infected individuals, and those who had been in close contact with a case, were asked to stay in voluntary home quarantine and refrain from contact with visitors for seven days from the date of symptom onset or exposure to an infected person. Oseltamivir (Tamiflu®) was available for treatment or prophylaxis. Methods We surveyed affected families through schools involved in the closures. Analyses of responses were descriptive. We characterized recommendations made to case and contact households and quantified adherence to guidelines and antiviral therapy. Results Of the 314 respondent households, 51 contained a confirmed case. The prescribed quarantine period ranged from 1-14 days, reflecting logistic difficulties in reactive implementation relative to the stated guidelines. Household-level compliance with the requirement to stay at home was high (84.5%, 95% CI 79.3,88.5) and contact with children outside the immediate family infrequent. Conclusions Levels of compliance with recommendations in our sample were high compared with other studies, likely due to heightened public awareness of a newly introduced virus of uncertain severity. The variability of reported recommendations highlighted the difficulties inherent in implementing a targeted reactive strategy, such as that employed in Melbourne, on a large scale during a public health emergency. This study emphasizes the need to understand how public health measures are implemented when seeking to evaluate their effectiveness.

Preparation of size-selective Mn3O4 hexagonal nanoplates with superior electrochemical properties for pseudocapacitors

Porous Mn3O4 hexagonal nanoplates were synthesized through annealing the hydrohausmannite precursor obtained by a one-pot hydrothermal process and by precisely controlling the concentrations of potassium hydroxide and glucose. The effect of potassium hydroxide and glucose on the growth of hexagonal nanoplates was investigated, and a growth mechanism was also proposed. Due to its abundant pores, the pure Mn3O4-based electrode exhibits excellent cycling stability with 100% capacity retention after 5000 cycles. The asymmetric supercapacitor exhibited high performance with an energy density of 17.276 W h kg^-1 at a power density of 207.3 W kg^-1 in a wide potential window of 1.5 V.

Book review: The High Commissioners: Australia's representatives in the United Kingdom, 1910-2010

The post of Australian High Commissioner in London has always been one of the most important and prestigious of Australia’s diplomatic posts. Indeed, as The High Commissioners demonstrates, for much of the one hundred years for which the post has existed it was an influential link between two parts of the British Empire, rather than a diplomatic mission in a foreign nation. It was for a long time a diplomatic post, but of a hybrid nature; an evolving child of empire. This handsomely produced book is a scholarly study of the position and of the many high commissioners. The chapters, which examine all the high commissioners and a range of related subjects, have been authored by many of Australia’s leading historians of empire and of foreign policy, with the most recent high commissioners covered by former government officials. While the book is designed as a celebration of the centenary of the Australian High Commission in London it is not a work of hagiography. Important analyses are presented of the strengths and weaknesses of many of the key high commissioners, such as George Reid, Andrew Fisher, S.M. Bruce, Alexander Downer senior and John Armstrong. Indeed, the book leaves the strong impression that some of the high commissioners, especially after the Second World War, were often well behind the Australian people in appreciating how the relationship between Australia and the United Kingdom was changing. The research and writing is of a uniformly high standard with each chapter providing many interesting insights into the history of Australian foreign policy.

Strain sensors with adjustable sensitivity by tailoring the microstructure of graphene aerogel/PDMS nanocomposites

Strain sensors with high elastic limit and high sensitivity are required to meet the rising demand for wearable electronics. Here, we present the fabrication of highly sensitive strain sensors based on nanocomposites consisting of graphene aerogel (GA) and polydimethylsiloxane (PDMS), with the primary focus being to tune the sensitivity of the sensors by tailoring the cellular microstructure through controlling the manufacturing processes. The resultant nanocomposite sensors exhibit a high sensitivity with a gauge factor of up to approximately 61.3. Of significant importance is that the sensitivity of the strain sensors can be readily altered by changing the concentration of the precursor (i.e., an aqueous dispersion of graphene oxide) and the freezing temperature used to process the GA. The results reveal that these two parameters control the cell size and cell-wall thickness of the resultant GA, which may be correlated to the observed variations in the sensitivities of the strain sensors. The higher is the concentration of graphene oxide, then the lower is the sensitivity of the resultant nanocomposite strain sensor. Upon increasing the freezing temperature from −196 to −20 °C, the sensitivity increases and reaches a maximum value of 61.3 at −50 °C and then decreases with a further increase in freezing temperature to −20 °C. Furthermore, the strain sensors offer excellent durability and stability, with their piezoresistivities remaining virtually unchanged even after 10 000 cycles of high-strain loading−unloading. These novel findings pave the way to custom design strain sensors with a desirable piezoresistive behavior.

The development of the comprehensive child maltreatment scale

In this paper, data are presented from four studies that describe and evaluate the psychometric properties of the Comprehensive Child Maltreatment Scale (CCMS). This is a new measure that assesses five separate types of maltreatment experienced during childhood (sexual abuse, physical abuse, psychological maltreatment, neglect and witnessing family violence) and the existence of multi-type maltreatment. This scale is the only paper-and-pencil research scale available that assesses all five types of child maltreatment separately. In Studies 1 and 2, the CCMS for Adults was used to assess retrospective reports of adults' own childhood experiences (N=313). The parallel version of the CCMS for Parents was used in Studies 3 and 4 to assess parent reports of the experiences of children from 5 to 12 years of age (N=100). Adequate test-retest reliability and internal consistency were found for each of the scales of the CCMS for Adults and the CCMS for Parents. As well as performing an exploratory factor analysis, a criterion validity check on the CCMS for Adults revealed high correlations with appropriate subscales from the Child Abuse Trauma Scale. These preliminary data on the CCMS for Adults and Parents show that they are psychometrically sound and useful research tools in the study of multiple forms of child abuse and neglect. The CCMS for Adults and the CCMS for Parents allow for a simple yet comprehensive assessment of multi-type maltreatment.

The effect of water deprivation on the expression of atrial natriuretic pepide and its receptors in the spinifex hopping mouse, Notomys alexis

This study investigated the mRNA expression of the atrial natriuretic peptide (ANP) system (peptide and receptors) during water deprivation in the spinifex hopping mouse, Notomys alexis, a native of central and western Australia that is well adapted to survive in arid environments. Initially, ANP, NPR-A and NPR-C cDNAs (partial for receptors) were cloned and sequenced, and were shown to have high homology with those of rat and mouse. Using a semi-quantitative multiplex PCR technique, the expression of cardiac ANP mRNA and renal ANP, NPR-A, and NPR-C mRNA was determined in 7- and 14-day water-deprived hopping mice, in parallel with control mice (access to water). The levels of ANP mRNA expression in the heart remained unchanged, but in the kidney ANP mRNA levels were increased in the 7-day water-deprived mice, and were significantly decreased in the 14-day water-deprived mice. NPR-A mRNA levels were significantly higher in 7-day water-deprived mice while no change for NPR-A mRNA expression was observed in 14-day water-deprived mice. No variation in NPR-C mRNA levels was observed. This study shows that water deprivation differentially affects the expression of the ANP system, and that renal ANP expression is more important than cardiac ANP in the physiological adjustment to water deprivation.

Renal C-type natriuretic peptide and natriuretic peptide receptor B mRNA expression are affected by water deprivation in the Spinifex Hopping mouse

This study investigated the effect of water deprivation on the expression of C-type natriuretic peptide (CNP) and natriuretic peptide receptor B (NPR-B) mRNA, and the ability of NPR-B to generate cGMP in the Spinifex Hopping mouse, Notomys alexis. This rodent is a native of central and western Australia that is well adapted to survive in arid environments. Initially, CNP and NPR-B cDNAs (partial for NPR-B) were cloned and sequenced, and were shown to have high homology with those of rat and mouse. RT-PCR analysis showed CNP mRNA expression in the kidney, proximal and distal colon and small intestine, whilst NPR-B mRNA expression was found in the kidney, proximal and distal colon and the atria. Using a semi-quantitative multiplex PCR technique, the expression of renal CNP and NPR-B mRNA was determined in 7- and 14-day water-deprived hopping mice, in parallel with control hopping mice (access to water). Water deprivation significantly decreased the relative levels of CNP and NPR-B mRNA expression in both the 7- and 14-day water-deprived hopping mice, when compared to control hopping mice. In contrast, the ability of CNP to stimulate cGMP production was significantly increased after 14 days of water deprivation. This study shows that alterations in the renal CNP/NPR-B system may be an important physiological adjustment when water is scarce.

Separoh jalan (halfway)

The sign that marked the exact mid-point of the journey between Launceston and Hobart was located at the far side of the road in one of the overtaking lanes on the highway. The road that connected the two main towns in the state of Tasmania was full of overtaking lanes, special lanes that allowed drivers to pass others going in the same direction at slower speeds. Even though the north-south highway was wide and newly surfaced, there was only one lane in each direction. The passing lanes brought relief to a driver trapped behind a truck with a heavy load or who was in a hurry like Rusli that morning. He had only been in the southernmost Australian state for four months but had travelled back and forth between Launceston and Hobart nearly 20 times in a car belonging to the University of Tasmania where he worked. For some reason, he had never before noticed the marker which was only a knee-high sign with three sides. The one facing north to Launceston said H100 while the one facing south to Hobart said L100. Rusli had been hired as a lecturer for one academic year of about eight months to teach at the Indonesian programme at the university. Because Indonesian was the one language offered on both campuses, at least once a week Rusli had to drive from Launceston where he was appointed.