An evaluation of the role and impacts of alien finfish in Asian inland aquaculture

Asia dominates global aquaculture production accounting for over 80% of the total and the mainstay in Asian aquaculture is finfish. Over the years, Asia has experienced a number of inter-continental and intra-continental transfers/introductions/translocation of finfish species, between nations and watersheds, beyond their natural range of distribution, primarily for aquaculture development. In this article all such species are referred to as alien species. An attempt is made to evaluate the importance of the production of alien species in selected Asian nations, using statistics of the Food and Agriculture Organization. Also, negative effects, if any, based on literature surveys, of alien species in relation to displacement of indigenous species, and on biodiversity and/or genetic diversity together with associated pathogen transfers are evaluated. The major alien species, based on their significance to Asian inland aquaculture considered, are the tilapias, catfish, Chinese and Indian major carps and common carp. It is estimated that currently alien species account for nearly 12% of the cultured finfish production (2.6 million tonnes) in Asia, valued at US$ 2.59 billion, and the contribution exceeds 40% when Asian countries excluding China are taken into consideration. Inland finfish aquaculture in some Asian nations, such as Indonesia and the Philippines, is predominated by alien species, and in some others, e.g. Bangladesh and India, the contribution from alien species has been increasing steadily. It is suggested that overall alien finfish species have done little ecological harm to native flora and fauna. However, in the wake of increasing anthropogenic development taking place in watersheds the resulting environments are often made unconducive to indigenous species but not to some alien species, thereby potentially and indirectly making the latter invasive.

Unravelling Woomera : lip sewing, morphology and dystopia

Presents a gendered interpretation of reports of protests in 2000-2002 among asylum seekers held at Australia’s recently closed Woomera Detention Centre, discussing instances of lip sewing that evoked strong reaction from the Australian Government, people and press. Suggests that an Irigarayan gendered reading of lip sewing assists in understanding these examples of self-harm, supplementing feminist readings of craft, and calling attention to local enactments of gender in both refugee studies and in organizational development and change.

Impact of an empowerment-based parent education program on the reduction of youth suicide risk factors

Purpose: To evaluate the impact of parent education groups on youth suicide risk factors. The potential for informal transmission of intervention impacts within school communities was assessed.

Methods: Parent education groups were offered to volunteers from 14 high schools that were closely matched to 14 comparison schools. The professionally led groups aimed to empower parents to assist one another to improve communication skills and relationships with adolescents. Australian 8th-grade students (aged 14 years) responded to classroom surveys repeated at baseline and after 3 months. Logistic regression was used to test for intervention impacts on adolescent substance use, deliquency, self-harm behavior, and depression. There were no differences between the intervention (n = 305) and comparison (n = 272) samples at baseline on the measures of depression, health behavior, or family relationships.

Results: Students in the intervention schools demonstrated increased maternal care (adjusted odds ratio [AOR] 1.9), reductions in conflict with parents (AOR .5), reduced substance use (AOR .5 to .6), and less delinquency (AOR .2). Parent education group participants were more likely to be sole parents and their children reported higher rates of substance use at baseline. Intervention impacts revealed a dose-response with the largest impacts associated with directly participating parents, but significant impacts were also evident for others in the intervention schools. Where best friend dyads were identified, the best friend’s positive family relationships reduced subsequent substance use among respondents. This and other social contagion processes were posited to explain the transfer of positive impacts beyond the minority of directly participating families.

Conclusions: A whole-school parent education intervention demonstrated promising impacts on a range of risk behaviors and protective factors relevant to youth self-harm and suicide.

Emergency nurses' opinions regarding paediatric fever: the effect of an evidence-based education program

Introduction: The beliefs and opinions of individual nurses are key factors in clinical decisions. Emergency nurses’ clinical decisions related to paediatric fever establish emergency department norms, provide role-modelling for both peers and parents, underpin clinical management of febrile children, and influence fever management advice given to parents. Aim: This study aimed to examine: (i) the opinions of emergency nurses regarding paediatric fever, and (ii) the effect of an evidence-based education program on the opinions of emergency nurses regarding paediatric fever. Method: This study used a prospective pre-test/post-test design. The primary outcome measure was emergency nurses’ opinions measured using the ‘General Opinions about Fever Management in Children’ survey. The intervention for the study was two tutorials. Pre-test data was collected in June 2005 and post-test data was collected during August 2005. Results: Thirty-one emergency nurses participated in the study. There were a number of positive changes in emergency nurses’ opinions regarding paediatric fever as a function of an evidence-based educational intervention. Major domains of change were relationship between temperature and illness severity/risk of harm, use and effects of antipyretic medication and febrile convulsions.  Conclusion: Emergency nurses are an important source of information for parents leaving the emergency department with a febrile child. Opinions can be a major influence in nurses’ clinical decisions and many fever  management strategies used by health care professionals are reflective of individual beliefs rather than the best available evidence. The results of this study showed a number of positive changes in emergency nurses’ opinions regarding paediatric fever as a function of an evidence-based educational intervention.

Youth alcohol and other drug use in the United States and Australia: a cross-national comparison of three state-wide samples

Although youth drug and alcohol harm minimization policies in Australia are often contrasted with the abstinence and zero tolerance policies adopted in the United States, there has been little research directly comparing youth substance use behaviour in the two countries. Three state representative samples in Victoria, Australia (n = 7898) and in the US states of Oregon (n = 15 224) and Maine (n = 16 245) completed a common cross-sectional student survey. Rates of alcohol use (lifetime alcohol use, recent use in the past 30 days), alcohol use exceeding recommended consumption limits (binge drinking: five or more drinks in a session), other licit drug use (tobacco use), and norm-violating substance use (substance use at school, use in the past 30 days of marijuana or other illicit drug use) were compared for males and females at ages 12-17. Rates were lower (odds ratios 0.5-0.8) for youth in Maine and Oregon compared to Victoria for lifetime and recent alcohol use, binge drinking and daily cigarette smoking. However, rates of recent marijuana use and recent use of other illicit drugs were higher in Maine and Oregon, as were reports of being drunk or high at school. In contradiction of harm minimization objectives, Victoria, relative to the US states of Oregon and Maine, demonstrated higher rates of alcohol use exceeding recommended consumption limits and daily tobacco use. However, findings suggested that aspects of norm-violating substance use (substance use at school, marijuana use and other illicit drug use) were higher in the US states compared to Victoria.

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.

Embodied energy analysis of the refurbishment of a small detached building

Energy efficient design principles and the minimisation of operational energy requirements have been demonstrated in the refurbishment of a small existing residential building. Significant thought has been given to these areas, together with an emphasis on the minimisation of resource consumption and material wastage. However, less consideration has been given to the embodied energy of the additional materials, components and systems required to meet these aims. The additional embodied energy may reduce the advantages of minimising the operational energy consumption by extending the energy payback period beyond the life of the building. In general, the embodied energy of buildings and their products has been found to be significant, when national average input-output data is used to fill gaps in traditional life-cycle assessment inventories. Through the use of an input-outputbased hybrid embodied energy analysis, the embodied energy of this refurbished building has increased by 63% compared to the existing building, showing the impact that filling the gaps in traditional inventories can have on energy payback periods.

Technical development for deconstruction management

The Australian construction industry, particularly in the area of demolishing existing facilities, is responsible for up to 40% of the country's enormous solid waste streams, totalling about 14 million tonnes annually. The recently created concept of deconstruction, rather than destruction for demolishing a constructed facility, came about because of the rapidly increasing number of demolished buildings and changes in levels of environmental awareness. However,  reconstruction processes are now seen as only an interesting concept for reducing waste through reuse and recycling, but they fail to achieve widespread understanding or acceptance. The challenges faced by deconstruction are significant and diverse. The maturity of deconstruction practice depends on not only on tlle development of deconstruction techniques and management, but also on the enhancement of deconstruction awareness by the owners, designers, and construction teams, as well as the development of environmental regulations. These practical limitations are interrelated and mutually promotional. The technical developments in deconstruction management resulting from this research will have direct effects on various aspects, including the development of design and construction for deconstruction, deconstruction technology, reused material certification, recycl ing technology, and a method by which to calculate environmental benefits so that deconstruction would be promoted from an interesting concept mainly in theory to wide acceptance in practice. 

Concepts, models and analyses of electronic demolition of buildings

The demolition of building structures produces enormous amounts of waste materials. In most current demolition projects, a great number of demolished materials are directly sent to landfill after their primary usage due to the difficulties in finding their next usage immediately. At the same time, because of limited supply of second-hand materials, new and high quality materials are used in construction projects whose design standards can be fitted using the secondary or used materials. However, this is an inefficient method to reduce waste because off the flow nature of the current waste-exchange systems and the demolition procedure. The recent concept using deconstruction rather than destruction for demolishing a constructed facility fails to achieve widespread understanding or acceptance due to various practical limitations. In this paper, for the purpose of envisaging the deconstruction implementations in practice and promoting cascading usages of construction materials, the concept of electronic demolition (e-Demotion, eDemolition) is put forward for the first time. E-demolition is a virtual demolition approach by which the demolition information, progress and outputs are operated before the physical demolition. Furthermore, the authors set up the essential models to implement electronic demolition of buildings from the viewpoints of demolition progress, business, and information. Each model is demonstrated in accord with the conventional demolition practice and subject to the ideal deconstruction implementation. Following the electronic demolition of a real project, the physical demolition can be anticipated with a minimum of construction waste emission.

Conceptualising the role of reciprocity in relationship marketing : an examination of its supporting virtues

One possible “kind” of marketing relationship occurs where a norm of reciprocity is upheld. The norm states that “we should return good for good, in proportion to what we receive; we should resist evil, but not do evil in return; we should make reparation for the harm we do;...furthermore that obligations should be felt in retrospect” (Becker, 1990, p.4). The appeal of this kind of exchange is that it provides the participants with traits that enable them to pursue excellence in moral behaviour. Making the assumption that societal goal is good moral citizenship; this could be the perfect relationship. It is therefore a good starting point toward examining other types. However, “Reciprocity, taken by itself is insufficient for its own purposes” (Becker, 1986, p.150). It relies on a number of supporting virtues. This paper builds on previous work that conceptualises the role of reciprocity in relationship marketing by examining these virtues. For the norm to effectively stabilize marketing relationships it relies on the presence of other virtues, these include, generosity, conviviality, empathy, and practical wisdom (Becker, 1986). These traits are explored within the context of reciprocity and supporting relationship marketing literature.

Problem of precision missile guidance: LQR and H‡ control frameworks

Addressed here is the precision missile guidance problem where the successful intercept criterion has been defined in terms of both minimizing the miss distance and controlling the missile body attitude with respect to the target at the terminal point. We show that the H∞ control theory, when suitably modified, provides an effective framework for the precision missile guidance problem. The existence of feedback controllers (guidance laws) is investigated for the case of finite horizon and non-zero initial conditions. Both state feedback and output feedback implementations are explored.

School, parent, and student perspectives of school drug policies

Background: Schools use a number of measures to reduce harmful tobacco, alcohol, and drug use by students. One important component is the school's drug policy, which serves to set normative values and expectations for student behavior as well as to document procedures for dealing with drug-related incidents. There is little empirical evidence of how policy directly or indirectly influence students' drug taking. This study compares how effectively schools communicate school drug policies to parents and students, how they are implemented, and what policy variables impact students' drug use at school and their perceptions of other students' drug use at school.

Methods: Data were obtained from 3876 students attending 205 schools from 2 states in the United States and Australia, countries with contrasting national drug policy frameworks. School policy data were collected from school personnel, parents, and students.

Results: Schools' policies and enforcement procedures reflected national policy approaches. Parents and students were knowledgeable of their school's policy orientation.

Conclusions: When delivered effectively, policy messages are associated with reduced student drug use at school. Abstinence messages and harsh penalties convey a coherent message to students. Strong harm-minimization messages are also associated with reduced drug use at school, but effects are weaker than those for abstinence messages. This smaller effect may be acceptable if, in the longer term, it leads to a reduction in harmful use and school dropout within the student population.

User perceptions and acceptance of benevolent worms - a matter of fear?

Worms and other forms of malware have been considered by IT Security firms and large companies for many years as one of the leading threats to the integrity of their data and security. However, several researchers over recent years have been working on creating worms which, instead of causing harm to machines which they infect, or the networks on which the machines reside, actually aid the network and systems administrators. Several uses of these worms have been proposed by these researchers, including, but not limited to, rapid remote patching of machines, network and system administration through use of their unique discovery and propagation methods, actively hunting, and defending against, other forms of malware such as "malevolent" worms, viruses, spyware, as well as increasing reliable communication of nodes in distributed computing. However, there has been no hint of commercial adoption of these worms, which one researcher has described as being due to a fear factor'. This paper concentrates on assessing and delivering the findings of user attitudes towards these worms in an attempt to find out how users feel about these worms, and to try and define and overcome the factors which might contribute to the fear factor'.

The impact of a police crackdown on a street drug scene : evidence from the street

This article documents the impact of a police crackdown on a street heroin market in a suburb of Melbourne, Australia, as perceived by individuals involved in the market. While our data suggest that ‘Operation Clean Heart’ achieved its objective of reducing the visible aspects of this street drug scene, they also imply that the drug market rapidly adapted to its new conditions and that the impact of the operation was essentially superficial and temporary. In addition, we contend that the operation had numerous (unintended) negative consequences, some of which are potentially harmful to public health. Negative outcomes implied by our data included the partial displacement of the drug scene to nearby metropolitan areas; the discouragement of safe injecting practice and safe needle and syringe disposal; and more frequent occurrences of violence and fraud. These outcomes may outweigh the perceived positive impacts, which were achieved at significant public expense. We conclude that police crackdowns are inappropriate responses to illicit drug problems; instead, in line with longstanding Australian policy, approaches which incorporate and balance demand reduction, supply reduction and harm reduction principles should be followed.

"As long as it doesn't spill over into class": harms arising from students` alcohol use, and the role of policy in reducing them

While there is considerable evidence about the prevalence of student alcohol use, little empirical work has examined the range and level of exposure to alcohol-related risks facing student populations, and the views of key stakeholders about these. This study was conducted at a large multi-campus university in order to gauge the scale and severity of students’ alcohol-related problems, and ways in which these may be mitigated. Student perspectives on campus based policy making with respect to alcohol were also canvassed. This study utilised a range of evaluative instruments, including standardised questionnaire protocols, structured interviews and focus groups. Data gained from students showed a large level of exposure to alcohol-related harm, and staff informants reported student harms such as drink-driving, interpersonal aggression, social nuisance, inadequate security, sexually risky behaviour, and physical malaise. As a group, students seem receptive to campus-based policies that have a harm reduction focus, but are less supportive of institutionalised measures aimed at the student body. Given the divergence of views about the harms arising from student drinking, and a general repudiation of institutional policy measures which may lessen these, the development of harm-reducing policy on alcohol remains challenging.