Degradation of phenanthrene and pyrene in soil slurry reactors with immobilized bacteria Zoogloea sp.

The environmental fate of polycyclic aromatic hydrocarbons (PAHs) in soils is motivated by their wide distribution, high persistence, and potentially deleterious effect on human health. Polycyclic aromatic hydrocarbons constitute the largest group of environmental contaminants released in the environment. Therefore, the potential biodegradation of these compounds is of vital importance. A biocarrier suitable for the colonization by micro-organisms for the purpose of purifying soil contaminated by polycyclic aromatic hydrocarbons was developed. The optimized composition of the biocarrier was polyvinyl alcohol (PVA) 10%, sodium alginate (SA) 0.5%, and powdered activated carbon (PAC) 5%. There was no observable cytotoxicity of biocarriers on immobilized cells and a viable cell population of 1.86 × 10¹⁰ g^–1 was maintained for immobilized bacterium. Biocarriers made from chemical methods had a higher biodegradation but lower mechanical strengths. Immobilized bacterium Zoogloea sp. had an ideal capability of biodegradation for phenanthrene and pyrene over a relative wide concentration range. The study results showed that the biodegradation of phenanthrene and pyrene reached 87.0 and 75.4%, respectively, by using the optimal immobilized method of Zoogloea sp. cultivated in a sterilized soil. Immobilized Zoogloea sp. was found to be effective for biodegrading the soil contaminated with phenanthrene and pyrene. Even in "natural" (unsterilized) soil, the biodegradation of phenanthrene and pyrene using immobilized Zoogloea sp. reached 85.0 and 67.1%, respectively, after 168 h of cultivation, more than twice that achieved if the cells were not immobilized on the biocarrier. Therefore, the immobilization technology enhanced the competitive ability of introduced micro-organisms and represents an effective method for the biotreatment of soil contaminated with phenanthrene and pyrene.

The influence of allopurinol on urinary purine loss after repeated sprint exercise in man

The influence of allopurinol on urinary purine loss was examined in 7 active male subjects (age 24.9 ± 3.0 years, weight 82.8 ± 8.3 kg, V˙o₂peak 48.1 ± 6.9 mL · kg^&minus;1 · min^&minus;1). These subjects performed, in random order, a trial with 5 days of prior ingestion of a placebo or allopurinol. Each trial consisted of eight 10-second sprints on an air-braked cycle ergometer and was separated by at least a week. A rest period of 50 seconds separated each repeated sprint. Forearm venous plasma inosine, hypoxanthine (Hx) and uric acid concentrations were measured at rest and during 120 minutes of recovery from exercise. Urinary inosine, Hx, xanthine, and uric acid excretion were also measured before and for 24 hours after exercise. During the first 120 minutes of recovery, plasma Hx concentrations, as well as the urinary Hx and xanthine excretion rates, were higher (P < .05) with allopurinol compared with the placebo trial. In contrast, plasma uric acid concentration and urinary uric acid excretion rates were lower (P < .05) with allopurinol. The total urinary excretion of purines (inosine + Hx + xanthine + uric acid) above basal levels was higher in the allopurinol trial compared with placebo. These results indicate that the total urinary purine excretion after intermittent sprint exercise was enhanced with allopurinol treatment. Furthermore, the composition of urinary purines was markedly affected by this drug.

The summer games

As part of a nationally funded project, we have developed and used 'games' as student centred teaching resources to enrich the capacity for design in beginning students in architecture, landscape architecture and urban design. Students are encouraged to learn inter-actively in a milieu characterised by self-directed play in a low-risk computer modelling environment. Recently thirteen upper year design students, six from Adelaide University (Adelaide, South Australia, Australia), five from Deakin University (Geelong, Victoria, Australia), and two from Victoria University, (Wellington, New Zealand) were commissioned over a ten-week period of the 2000-2001 Australian summer to construct a new series of games. This paper discusses the process behind constructing these games.

This paper discusses six topical areas:

– what is a game;
– specific goals of the summer games;
– the structure of a game;
– the game-making process;
– key findings from the production unit; and
– future directions.

MRP-production planning in agile manufacturing

Over the years many researchers have been investigating the area of MRP production planning and still is an area of high interest today. This paper look at production planning where there is unpredictable demands due to the type of product and market a company produces for. Production planning becomes difficult when demand fluctuates unpredictably, and hence a historical sales forecast is used as the initial data for production planning. The sales from previous years, especially in a seasonal market, don't necessarily correlate well to the current and future sales for the next year. A planner working in such environment would have himself frustrating to create a feasible production plan that not only needs to meet customer's demands but also to built up the 'correct' amount of stock for that peak sell season. To overcome some of these problems, This work describes a production planning methodology that can be implemented robustly and quickly. This paper has studied two multi-item lot-sizing problems. We detailed the development of the planning problem mathematically and highlight some solutions to initial problems investigated.

Procedural trained, procedural remain : the first report from 'A census of doctors who have been awarded the Graduate Diploma in Rural General Practice (GDRGP)'

Aims & rationale/Objectives : To document the practice of initial cohorts receiving the Graduate Diploma in Rural General Practice
Methods : With the co-operation of the National Rural Faculty (NRF) of Royal Australian College of General Practitioners (RACGP), a census by questionnaire was conducted on 279 graduates. The response rate was 70%.
Principal findings : The target doctors are young (65% < 40 years old). Under half (42.3%) have completed Advanced Rural Skills terms in >1 discipline. Of the total 272 posts recorded from 174 respondents, the most popular advanced skill is anaesthetics, followed by obstetrics. The ARSP increased confidence in 96.3% of respondents. Two thirds of doctors trained in a procedural skill remain practicing procedural General Practice.
Discussion : The GDRGP was the qualification developed to recognise competency gained as a result of a series of rural training initiatives begun within the RACGP Training Program in 1992. Its delivery has continued under the new GPET Training Program. Outcomes from the range of initiatives leading to the GDRGP are currently emerging in an environment which has seen significant changes within vocational training, and within the context of a rising focus on indemnity. Doctors who undertook this training have mostly retained procedural practice. In addition, RACGP rural initiatives successfully achieved increase confidence prior to rural work in advanced areas of practice, with >95% reporting an increase.
Implications : Changes within vocational training were accelerated without analysis of existing initiatives such as the GDRGP. Funding for the GDRGP was, as a result, withdrawn prematurely. These changes also saw the entrant of a second College with an interest in rural procedural practice. This research show that the GDRGP offers, and offered, a clear vocational pathway that will guide a doctor to a career as a rural doctor, and provide them with the advanced skills they need to practice confidently in the bush. It is important to capitalise on past success before deconstructing professional concepts of practice further.
Presentation type : Paper

An exploratory study on internal audit independence in Australia

This study draws on agency and institutional theory to examine the issue of internal audit’s independence through its relationship with components of corporate governance.

The internal audit function is actively considered as one of the four components of corporate governance, along with the board, management and external auditors. It serves this purpose by providing a range of services in its capacity of monitoring and consulting which is actively sought by the other components of corporate governance to satisfy their extended accountability requirements. The integrity of these services is, however, only assured if internal audit maintains its independent status. As such there is a “tension” resulting from the pressure to provide these value added services as perceived by the parties involved and maintaining its independence status.

Based on an extended survey with organisations in the Australian corporate sector, this study critically examines the results of the survey against existing literature and best practice guidelines to determine if internal audit functions operating under this tense environment are operating independently.

The results indicate an interesting analysis. While it indicates a somewhat trend in complying with best practice guidelines for maintaining independence, it also indicates that this is not consistently adhered to as organisations are able to operate in an environment that compromises internal audit independence. A main reason for this appears to be a mix of internal audit structural set ups brought about by a lack of statutory backing to provide for consistency in implementation of best practice guidelines for maintaining independence. This is exacerbated by internal audit being viewed as partner by these parties thus widening the “tension” gap between its advisory role and its independent status. A wider question emerges which questions the ability to maintain this independence concept under a partnership management environment. The concept of internal audit being an independent function as promulgated by the Institute of Internal Auditors through its definition of internal audit is seriously questioned under the totality of this environment.

Al- Jazeera : a broadcaster creating ripples in a stagnant pool

Al-Jazeera is unique in the Arab world. In an environment of state-controlled or compliant media, this Arab-language news channel thinks of itself as a breath of fresh air or a source of fresh water. It broadcasts controversial subjects and, in doing so, it has attracted an audience of 35 million households glued to its programming - and criticism.

Al-Jazeera : a broadcaster creating ripples in a stagnant pool

Al-Jazeera is unique in the Arab world. In an environment of state-controlled or stale media, this Arab-language news channel sees itself as a source of fresh water in a parched region bereft of freedom of expression. It broadcasts controversial subjects and, in doing so, has attracted an audience of 35 million households - and plenty of criticism. Most notable controversies have been the airing of tapes of Osama bin Laden. and the broadcasting of images of captured Coalition soldiers and bloodied corpses during the Iraq war. Before those events, Al-Jazeera had criticised Arab heads of state, blatantly ignoring the Arab States Broadcasting Union's code of honour. Some companies have avoided the channel because advertising in the Middle East is based on political, not commercial, interests. Yet along the way, AI-Jazeera has put Qatar. a tiny Gulf nation of perhaps 600,000 people, on the world map. Based on the last-known interviews before the station went on a war footing, this paper looks at why and how AI-Jazeera does what it does. Among the things covered are how the station defines freedom of expression through its own eyes. the role that the station and its employees believe they are serving in the marketplace. and why they do what they do. The paper also considers the station s role in the war in Iraq in March and April of 2003.

Occupant satisfaction with workplace design in new and old environments

Purpose: – The aim of this paper is to investigate time-factors in occupant-environment relationships.

Design/methodology/approach: – The paper analyses satisfaction ratings on 12 workplace environment features collected from more than 5,000 occupants in 48 office buildings in Australia. The database is divided into seven environment categories: first occupied after construction; new occupation after major update; recent relocation into an existing environment; re-occupying an environment after refurbishment; relocation of workspace in an existing environment; acclimatised occupation of a refurbished workspace; and continued occupation of an existing environment. Cumulative frequency profiles of the collected ratings for each of these categories are analysed qualitatively and quantitatively.

Findings: – The study shows that updated environments which are occupied by the same organisation before and after refurbishment are more successful than environments which are occupied by a new organisation after update. New buildings provide the greatest number of satisfied occupants. While many workplace design aspects are successfully addressed in newly designed and updated environments, satisfaction with acoustic and visual design features is equally poor in all investigated environment categories.

Originality/value: – The study develops understanding of which environment categories, defined by the duration of the occupant-environment relationships, are most successful in providing satisfying design features. The study thereby provides advice for facility management decision making.

Learning style drift : correlation between built environment students' learning styles and the learning styles of their teachers

This paper focuses on the results of a cross-curriculum learning style survey conducted in an Australian School of Architecture and Building as part of an ongoing project aimed at resolving the learning difficulties of students collaborating in multi-disciplinary and multicultural team assignments. The research was conducted to determine how learning style differences in heterogeneous design teams might be addressed through pedagogy. We will argue that the likelihood of and reasons for learning style fluidity in student design cohorts needs determining if learning style theory is to provide a workable model for informing the teaching of design.
In light of evidence in student cohorts of learning style changes as students progress through their studies (Tucker, 2007), this research discusses one explanation of what appears to belearning style fluidity in architecture student cohorts. If, as prior research has indicated, the learning styles of academics are quite different from practitioners, evidence of a learning style drift in built environment students towards the predominant learning styles of their design teachers might suggest that students are learning how to be academics rather than practitioners. This, of course, might have serious implications for built environment teaching and for practice.

Player welfare and privacy in the sports entertainment industry

In an era when games at the elite level are sports entertainment businesses many of the elite performers in different industries have evolved into celebrities: they exist as images, icons and brands whose every thought, action, change of style or partner is commodified and consumed. This article reports on one aspect of a research project that was funded by the Australian Football League (AFL) to explore the emergence and evolution of a `professional identity' for AFL footballers. Drawing on Foucault's later work on the care of the Self we focus on the ways in which player identities are governed by coaches, club officials, and the AFL Commission/Executive; and the manner in which players conduct themselves in ways that can be characterized as professional — or not. The article explores the roles of Player Development Managers (PDMs) in emerging processes of risk and player management that can be seen as intrusive in players' lives. The research we report on produced evidence of tensions between the paternalistic, profiling and reporting elements of various risk management practices at the Club level — in an environment where what it means to be a professional footballer is taking on new forms.

Engagement and learning through social software in finance : the trading room experience

The introduction of a social software blog space called “The Trading Room” in an undergraduate Finance unit for an assessment task generated a great deal of activity to support student learning. A subsequent evaluation of this pilot demonstrated that students perceived high value in the opportunity it provided for them to reaffirm theories, obtain individualized feedback and benchmark their work against others. Whilst assessment is generally seen as both the carrot and the stick of learning, and certification; students in the study reported that they would still participate in reading and posting to the “Trading Room” blog even if there was no assessment requirement! Additionally they did not see any value in the environment as a purely social space, reporting that they saw it primarily as a professional educational community. It would appear that just as there are different communities in the real world social space, there are also different types of communities in the online space. Context, structure and activity design, perhaps are the most important facets of online interaction for learning.

Does an evidence-based sedation protocol improve practice and patient outcomes in critical care?

Learning Objective 1: compare protocol-directed sedation management with traditional non-protocol-directed practice in mechanically ventilated patients in an Australian critical care.

Learning Objective 2: explain the contrasting international research findings on sedation protocol implementation.
Minimization of sedation in critical care patients has recently received widespread support. Professional organizations internationally have published sedation management guidelines for critically ill patients to improve the use of research in practice, decrease practice variability and shorten mechanical ventilation duration. Innovations in practice have included the introduction of decision making protocols, daily sedation interruptions and new drugs and monitoring technologies. The aim of this study was to compare protocol-directed sedation management with traditional non-protocol-directed practice in mechanically ventilated patients in an Australian critical care setting.

A randomized, controlled trial design was used to study 312 mechanically ventilated adult patients in a general critical care unit at an Australian metropolitan teaching hospital. Patients were randomly assigned to receive protocol directed sedation management developed from evidence based guidelines (n=153) or usual clinical practice (n=159).

The median (95% CI) duration of ventilation was 58 hrs (44–78 hrs) for patients in the non-protocol group and 79 hrs (56–93) for those patients in the protocol group (p=0.20). Results were not significant for length of stay in critical care or hospital, the frequency of tracheostomies, and unplanned extubations. A Cox proportional hazards model estimated that protocol directed sedation management was associated with a 22% decrease (95% CI: 40% decrease to 2% increase, p=0.07) in the occurrence of successful weaning from mechanical ventilation.

Few randomized controlled trials have evaluated the effectiveness of protocol-directed sedation outside of North America. This study highlights the lack of transferability between different settings and different models of care. Qualified, high intensity nursing in the Australian critical care setting facilitates rapid, responsive decisions for sedation management and an increased success rate for weaning from mechanical ventilation.

The role of the online teacher in supporting student learning: A case study

As teaching and learning environments for many tertiary courses move to online delivery, it is important to ensure effective student learning is still taking place. This paper presents a review of the current literature on the roles of the teacher and e-tutor in e-learning environments. The research presented here is a case study of a wholly online course in which the role of the etutors was examined. This was achieved through analysis of their online interactions with students from two separate offerings of the course. The study found that in this environment the main role undertaken by all e-tutors was a managerial one. Differences were also noted between the roles undertaken by casual e-tutors and faculty staff.

Perceptions of the value of site visits in assisting undergraduate learning

This study evaluates the usefulness of site visits in assisting the learning experience of undergraduate students. The research is based on a survey of undergraduates students enrolled in built-environment courses in property and construction. Past research has shown that it is becoming more difficult to provide students with access to building sites to provide learning experiences. While students were positive about the benefits of real site visits, universities have been encouraged to develop virtual approaches to teaching construction technology using photographs, movies and computer simulations.

This strategic research investigates the perceptions of students towards a number of different site visits each with particular characteristics. This was done to examine the most effective use of real site visits within an undergraduate course. The results identified that some aspects of construction technology could be easily replaced by computer simulations and the like. However, other aspects of the curriculum are more effectively taught by retaining real site visits. The research was intended to provide a more structured approach to determining the value of site-based learning in construction related courses.