Turbulence and stratification in priest pot, a productive pond in a sheltered environment

Priest Pot is an example of the abundant ponds that, collectively, contribute crucially to species diversity. Despite extensive biological study, little has been reported about the physical framework that supports its ecological richness. This article elucidates the physical character of Priest Pot’s water column and thus that of similar water bodies. Vertical thermal microstructure profiles were recorded during summer 2003 and analyzed alongside concurrent meteorological data. During summer stratification, the thermal structure appeared to be dominated by surface heat fluxes. Surface wind stress, limited by sheltering vegetation, caused turbulent overturns once a surface mixed layer was present but appeared to contribute little to setting up the thermal structure. Variations in full-depth mean stratification occurred predominantly over seasonal and ∼5-day time scales, the passage of atmospheric pressure systems being posited as the cause of the latter. In the uppermost ∼0.5 m, where the stratification varied at subdaily time scales, turbulence was active (sensu Ivey and Imberger 1991) when this layer was mixed, with dissipation values ε ∼ 10^−8 m² s^−3 and vertical diffusivity K_Z = 10^_−4 — 10_^−6 m^₂ s^−1. Where the water column was stratified, turbulence was strongly damped by both buoyancy and viscosity, and K_Z was an order of magnitude smaller. Vertical transport in the mixed layer occurred via many small overturns (Thorpe scale r.m.s. and maximum values were typically 0.02 m and 0.10 m, respectively), and seston were fully mixed through the water column.

Organisational decline and renewal in an Australian voluntary association

Voluntary associations are an integral fonn of social capital in democratic societies. These associations make vital contributions to community life. Many associations are successful in meeting the needs of their constituency and thrive over many decades. These long serving associations are not static vehicles, like all organisations, they are subject to internal and external pressures for change. It is a significant challenge for volunteer associations to maintain 'a watch' on the external environment whilst responding to the needs of their stakeholders. Previously vibrant associations may experience a decline in membership and social standing as a result of significant changes in society and technology. We track a nonprofit voluntary association from its inception in the 1960s through it responses to major environmental turbulence during the late 1980s, 1990s, and early 2000s when the survival of
the organisation was in doubt. We outline the changes that took place from 2003 that reorientated, revitalised and reshaped the association including a major shift in focus from services to members to services to the community. This study provides academics and practitioners with an appreciation of the forces of organisational decline and a case study of successful change in a voluntary association.

'Creative destruction': knowledge economy policy and the future of arts and humanities in the academy

Policy conceptualizations of the global knowledge economy have led to the channelling of much Higher Education and Research and Development funding into the priority areas of science and technology. Among other things, this diversion of funding calls into question the future of traditional humanities and creative arts faculties. How these faculties, and the disciplines within them, might reconfigure themselves for the knowledge economy is, therefore, a question of great importance, although one that as yet has not been adequately answered. This paper explores some of the reasons for this by looking at how innovation in the knowledge economy is typically theorized. It takes one policy trajectory informing Australia's key innovation statement as an example. It argues that, insofar as the formation of this knowledge economy policy has been informed by a techno-economic paradigm, it works to preclude many humanities and creative arts disciplines. This paper, therefore, looks at how an alternative theorization of the knowledge economy might offer a more robust framework from within which to develop humanities and creative arts Higher Education and Research policy in the knowledge economy, both in Australia and internationally.
1 This article draws on the Australian Research Council project, Knowledge/economy/society: a sociological study of an education policy discourse in Australia in globalising circumstances, being conducted by Jane Kenway, Elizabeth Bullen and Simon Robb. This 3-year project looks at how understandings of the knowledge economy and knowledge society inform current education policy and, in turn, how this policy translates into educational practice. The methodology includes policy analysis, interviews with policy makers in government, and supranational organizations. It also includes cameo studies of innovative educational practice, two of which we draw on here.

Newbs vs. geeks : encouraging creativity in an online learning community

This article explores the development and creative practices of an online  community within an Australian university. The authors argue that creativity can be enhanced and supported by the development and implementation of purpose-specific learning environments, such as an online learning community. Within such a community the participants are exposed to a number of requisite elements designed to support the exploration of their own learning process and the development of creativity. The following study discusses the establishment of such a community and the social, cultural and learning practices of the student participants.

Examining communication and team performance during clinical handover in a complex environment : the private sector post-anaesthetic care unit

* Threats to patient safety during clinical handover have been identified as an ongoing problem in health care delivery.

* In complex handover situations, organisational, cultural, behavioural and environmental factors associated with team performance can affect patient safety by undermining the stability of team functioning and the effectiveness of interprofessional communication.

* We present a practical framework for promoting systematic, comprehensive measurement of the factors involved in clinical handover.

* The framework can be used to develop viable solutions to the problems of clinical handover.

* The framework was devised and used in a recent project examining interprofessional communication and team performance during clinical handover in post-anaesthetic care units.

* The framework combines five key concepts: clinical governance, clinician engagement, ecological validity, safety culture and team climate, and sustainability.

* We believe that use of this framework will help overcome the limitations of previous research that has not taken into account the complex and multifaceted influences on clinical handover and interprofessional communication.

Preparing accounting students for success in the professional environment : enhancing self-efficacy through a work-integrated programme

This study provides empirical evidence of the effect of a simulated work integrated learning (WIL) program on students’ self-efficacy within an accounting context. An Accounting WIL Program was designed as a two-staged module using information seminars, networking sessions and in-depth workshops that helped develop final year accounting students’ understanding of the accounting profession as well as some basic skills expected of a new recruit. Data from a questionnaire survey of 35 participant students indicates that the students perceived greater self-efficacy upon completion of the WIL program, and that male students appeared to show greater self-efficacy for selected items.

The application of a fuzzy rule based system in an exposition of the antecedents of sedge warbler song flight

The utilization of a fuzzy aspect within data analysis attempts to move from a quantitative to a more qualitative investigative environment. As such, this may allow the more non-quantitative researchers results they can use, based on sets of linguistic terms. In this paper an inductive fuzzy decision tree approach is utilized to construct a fuzzy-rule-based system for the first time in a biological setting. The specific biological problem considered attempts to identify the antecedents (conditions in the fuzzy decision rules) which characterize the length of song flight of the male sedge warbler when attempting to attract a mate. Hence, for a non-quantitative investigator the resultant set of fuzzy rules allows an insight into the linguistic interpretation on the relationship between associated characteristics and the respective song flight duration.

An online environment for value added learning : more than you bargained for

Online web-based technologies are increasingly being used in educational and professional contexts to create an effective environment for teaching or professional learning. A number of studies have explored the intersections between on and off line teaching and learning, participants’ perceptions, and claims of connectedness and community fostered by online sites (Jones, 1998; Rheingold, 1995; Soderstrom, 2006). This paper will outline the development, functionality and usefulness of the online environment (Drupal) installed and used to support the Australian Government Summer School for Teachers of English. It includes an analysis of the virtual environment (social software) established for the Summer School. The research project aimed to determine what aspects of an online environment supported the success of this national professional development activity that incorporated physically present, and online communication, connection, and collaboration between 200 teachers over a period of seven months. In this paper the site manager explains their role and perspective of the potential of social software for learning.

Investigation into the interactive multimedia production processes of novice multimedia designer /producers in a constructivist environment

The main purpose of this study was to investigate the instructional interactive multimedia (IMI) production processes of adult novice multimedia production course. The study aimed at discovering whether a constructivistic teacher-learning environment facilitated these multimedia novice designer / producers to further develop metacognitivestates of higher-order thinking like schema formation, problem-solving and cognitive construction when producing their interactive multimedia project. To achieve this study examined the facilitative and limiting activities in planning, design and development that have assisted or hindered the NMDPs during their multimedia production work This research utilises a qualitative paradigm and makes extensive use of multiple data sources such as the participants’ proposals, planning aids, logs and final projects for single as well as cross-case analyses and discussion. Three cases were selected for in-depth analysis in the study because they provided interviews and more complete documentation and "thick descriptions" of their multimedia production activities. Findings about the NMDPs multimedia production endeavours showed that they learnt best about multimedia technology for teacing and learning by producing an interactive multimedia project themselves. Factors that enabled some of the NMDPs to flourish in a constructivistic environment included their ability to utilise their new and extended schemata to problem solve, their self regulation and a creative and positive attitude to demanding multimedia work NMDPs who utilised facilitative planning aids and design strategies produced impressive work. The study further indicates that the NMDPs’ holistic multimedia production experience made them aware of the levels of complexity involved and boosted their confidence about multimedia production for educational purposes. Suggestions for further research include examining the production styles of adult multimedia novices and young novices and investigating the implications of designing multimedia for large audience presentation rather than for single or small group learner usage.

Evaluation of heat stress indices using physiological comparisons in an alumina refinery in a sub-tropical climate

The production of alumina involves the use of a process known as the Bayer process. This method involves the digestion of raw bauxite in sodium hydroxide at temperatures around 250°C. The resultant pregnant liquor then goes through a number of filtering and precipitation processes to obtain the aluminium oxide crystals which are then calcined to obtain the final product. The plant is situated in a sub tropical climate in Northern Australia and this combined with the hot nature of the process results in a potential for heat related illnesses to develop. When assessing a work environment for heat stress a heat stress index is often employed as a guideline and to date the Wet Bulb Globe Temperature (WBGT) has been the recommended index. There have been concerns over the past that the WBGT is not suited to the Northern Australian climate and in fact studies in other countries have suggested this is the case. This study was undertaken in the alumina plant situated in Gladstone Queensland to assess if WBGT was in fact the most suitable index for use or if another was more applicable. To this end three indices, Wet Bulb Globe Temperature (WBGT), Heat Stress Index (HSI) and Required Sweat Rate (SWreq) were compared and assessed using physiological monitoring of heart rate and surrogate core temperature. A number of different jobs and locations around the plant were investigated utilising personal and environmental monitoring equipment. These results were then collated and analysed using a computer program written as part of the study for the manipulation of the environmental data . Physiological assessment was carried out using methods approved by international bodies such as National Institute for Occupational Safety & Health (NIOSH) and International Standards Organisation (ISO) and incorporated the use of a ‘Physiological Factor’ developed to enable the comparison of predicted allowable exposure times and strain on the individual. Results indicated that of the three indices tested, Required Sweat Rate was found to be the most suitable for the climate and in the environment of interest. The WBGT system was suitable in areas in the moderate temperature range (ie 28 to 32°C) but had some deficiencies above this temperature or where the relative humidity exceeded approximately 80%. It was however suitable as a first estimate or first line indicator. HSI over-estimated the physiological strain in situations of high temperatures, low air flows and exaggerated the benefit of artificial air flows on the worker in certain environments ie. fans.

Many versions of masculine : an exploration of boys' identity formation through digital storytelling in an afterschool program

Both scholarly literature and popular media often depict predominantly negative and one-dimensional images of boys, especially African-American boys. Predictions of these boys’ anticipated difficulties in school and adulthood are equally prevalent. This paper reports qualitative research that features case studies of nine urban boys of color, aged nine to eleven, who participated in an afterschool program where they learned to create digital multimedia texts. Drawing on an analysis of the children’s patterns of participation, their multimodal products, and their social and intellectual growth over time, the study revealed that these children demonstrated many versions of male selves, and that their digital stories narrated these identities in ways that often challenged hegemonic versions of masculinity. These enactments of identity were made possible by the ways that their afterschool social space structured their activities, as well as by the symbolic means and subject matters privileged in that space, principally digital multimodal narratives and popular culture. At a time when afterschool programs are under pressure to become extensions of the school day, this research argues for recognition of and support for the different functions such programs can serve when structured as alternative spaces for learning and identity formation.

Financial reporting policy in a dynamic environment

To cope with the increasing globalisation of capital markets, financial regulators in Australia have embarked on an ambitious program to converge national accounting standards with International Financial Reporting Standards. The convergence program means a significant departure from present financial reporting policy and will necessitate substantial change by reporting entities. The effectiveness of the existing differential reporting policy is drawn into question in the light of the changes taking place. An evaluation of the perceptions of the effectiveness of the extant differential reporting model is undertaken and alternative policy approaches considered. The findings indicate that certain aspects of the differential reporting model have inherent problems not necessarily related to the recent policy change and that corrective action needs to be undertaken to maintain its relevance.

House, home and dwellings - in an Australian context

Theoretical evidence in the behavioural and social sciences has shown the home to be a phenomenon borne of the complex relationship between individuals and their environment. A qualitative assessment of the specific home experiences of 12 case studies is offered to establish an understanding of home within a particular socio-cultural context in Australia. The thesis contends that the affective home has primacy in the home experience.

Spatial and temporal variation of infauna in an Australian estuary

Macroinvertebrates living within the sediments of the Hopkins River estuary were examined during 1997. Differences in the abundance and composition of faunal assemblages were identified between vegetated and unvegetated habitats and between the lower, middle and upper sections of the estuary. The numbers of taxa and individuals present were found to be similar to that of other periodically opened estuaries.