Walter Burley Griffin : residential

An analysis of Walter Burley Griffin's residential planning is presented. 43 plans are described according to the manipulation of triangle, T-square and compass, which support the possibility that Griffin may have been working in accordance with an underlying system of applied geometry based on the square and root 2 diagonal.

Plato's legacy : How to do philosophy

Although it has its origins earlier, philosophy as we know it in the West took its shape from the Socrates of Plato's Dialogues. It is not implausible to regard the Dialogues as heuristic devices designed for engaging in philosophical inquiry. As such, they would model the process of philosophical inquiry as well as illustrate the common pitfalls or errors to avoid when engaging in such inquiry. So it will not be surprising to see Socrates, the character of the Dialogues, modeling questionable, even poor, inquiry techniques as well as good; admonishing other characters for poor technique and reminding them of lessons they should have learned earlier in their tuition. Plato presumably would expect students reading and role-playing a Dialogue to recognise when and where such instances occur. It is instructive then to take a close look at one of the longer dialogues featuring Socrates engaging in such inquiry, not with an untutored interlocutor, but with a professional, the sophist Protagoras, in order to identify the features of the inquiry itself. For this will reveal something of what Plato conceived to be the activity of philosophy to which we are the heirs. The Protagoras can be read as an illustration (not a definition) of how to do philosophy. And to aid this reading, I propose to focus on the logical form of the inquiry, the moves made by the characters and the techniques displayed, rather than the adequacy of the substantive arguments they mount.

The effects of various binders and moisture content on pellet stability of research diets for freshwater crayfish

Two experiments were conducted to assess the water stability of a practical research diet manufactured with various binders and differing levels of moisture. In the first experiment the binders – agar, gelatine, carrageenan, and carboxymethylcellulose (CMC) were included at both 3 and 5% of total ingredient weight. All binders were tested with equal ingredient weight to water volume, and additionally carrageenan was tested in a diet with double the water volume. The dry matter remaining following immersion for up to 180 min was calculated and the rate of pellet decay was modelled using the Weibull distribution. The analysis revealed that the rate of dry matter loss decreased with time, and that carrageenan and CMC binders were significantly better (P < 0.001) binders than the agar and gelatine. The 5% binder concentration slowed the decay rate by as much as 62% as compared with the 3% binder concentration. The second experiment compared the binding performance of carrageenan and sodium alginate in both 50% moisture and 10% moisture pellets. The same analysis revealed that 10% moisture alginate-bound pellets were more water stable than the others. A discussion of the use of moist diets for crayfish research is included.

Defining the Australian mechanical engineer

The attribute focus in engineering education now adopted by the engineering education accrediting bodies of the US, UK and Australia is based on meeting the assumed needs of professional practice. It is associated with an increasing expectation by employers of work-ready graduates rather than relying on subsequent work-based learning and experience to develop many of the essential professional practice attributes. Yet the scope of the mechanical engineering profession is broad and views of practitioners contributing to debate on attribute requirements are largely influenced by their own often unique professional formation.

In addition, the formative development of the profession in Australia has been significantly influenced by 19th and 20th century UK and US practices, although historically the industrial profile of Australia has been strikingly different. An analysis of current industry distribution of Australian, UK and US mechanical engineers presented in this paper shows continuing, although less marked, differences.

To develop a clearer perception of the profession in Australia, its educational formation, and operational environment, this paper provides a concise study of the formative development of the profession, and presents a breakdown of the industry sectors in which they are currently employed. The effects of momentous global changes in engineering employment and formation over recent decades are also discussed.

Recent changes in engineering employment have included major structural changes to organisations, accelerating technical and educational developments and mounting societal expectations making it imperative that attributes be attuned to the new engineering paradigm as increasing demands are placed on our graduates.

This paper provides an essential foundation for ongoing debate and analysis of attribute needs related to this broadly based engineering discipline. Although presented from an Australian perspective, many issues discussed are applicable worldwide.

A Euro-American-Australian study of the mechanical engineering profession as a foundation for the study of mechanical engineering attributes

The increasing attribute focus in the formation (engineering education, training, work-based learning and experience) of engineers now being adopted by engineering education accrediting bodies is based on meeting the perceived needs of professional practice. Related to this is an increasing expectation of new graduates being work-ready rather than relying on work-based learning and experience to develop many of the essential professional practice attributes.

The scope of the mechanical engineering profession is broad and practitioners contributing to debate on attribute requirements have their own individual views of the nature of the profession, largely influenced by their own professional formation. As a foundation for detailed study on attribute requirements for effective Australian professional mechanical engineers, in this paper we provide a concise study of the development of the established scope of practice and knowledge base of the profession over the last two centuries. Formation practices in Europe and the United States played significant roles in the 19th century.

We conclude with a discussion on the impact of the considerable changes currently affecting mechanical engineering practice in the UK, US and Australia, including organisational, technical and societal expectations, industry profile, and educational factors.

Improving on- and off-campus student performance in structural mechanics

This paper investigates the performance of 329 (173 on- and 186  off-campus) students enrolled in two structural mechanics units at Deakin University, a leader in engineering distance-education in Australia. The two units experience unacceptably high rates of failure. An analysis of the assignment, laboratory and examination marks is presented. Consideration is also given to the total marks. The results show that on-campus students perform better in structural mechanics than their off-campus counterparts. Plots of the student performance distributions for the three assessment methods are provided (for each unit) and high failure rates are linked to low examination marks. Students tend to perform best in assignments and worst in examinations. Parametric statistical tests show a correlation between the continuous assessment and examination marks. To motivate students to fully participate in continuous assessment tasks the authors therefore propose several changes to the assessment criteria and marking schemes.

Case study research into Australian mechanical engineer attributes

The 1996 Johnson report on Australian engineering education recommended the development of a limited number of broadly defined attributes in engineering graduates as well as a broader based engineering
education. Within a year the Institution of Engineers, Australia responded by switching the focus of its engineering course accreditation to graduate attribute outcomes. It was to be the role of engineering school advisory panels to give greater definition to those attributes, but the scope of engineering is broad and the views of advisory panel members are largely influenced by their own often unique professional formation.
This paper presents a single discipline case study approach to identify the relative significance of a wide range of attributes required for the most common mechanical engineering roles in those industries that employ the greatest number of Australian mechanical engineers. Six industries were
identified that between them employ more than half of all Australian mechanical engineers, and most frequent or generic mechanical
engineering roles within those industries were studied.
Key findings of this research are then reviewed in the context of changing global engineering environment and educational practices.

Delivery and assessment strategies to improve on- and off-campus student performance in structural mechanics

This paper considers the delivery and assessment strategies used in two structural mechanics units at Deakin University, a leader in distance education in Australia. The two units have had unacceptably high rates of student failure. Student perceptions of the delivery method were analysed and an investigation was carried out of the performance of 329 (173 on- and 156 off-campus) students enrolled in the two units. An analysis of the assignment, laboratory and examination marks is presented. Consideration is also given to the total marks. The results show that on-campus students performed better in structural mechanics than their off-campus counterparts. Plots of the distributions of student performance for the three assessment methods are provided (for each unit) and high failure rates are linked to low examination marks. Students tended to perform best in assignments and worst in examinations. Parametric statistical tests show a correlation between the marks obtained in continuous assessment and in examinations, and it is therefore proposed that, in order to improve performance, the students must be encouraged to participate fully in all aspects of the course. Many students were unenthusiastic about laboratory practical sessions and did not think they aided their understanding of the theoretical material. Motivation to participate is often dependent on the perceived relevance of a given task and its contribution to the total mark and, thus, to help motivate students to participate fully in the continuous assessment tasks, the authors propose several changes to the delivery methods, as well as to assessment criteria and marking schemes.

Australian mechanical engineers : industries and attributes

The US and UK have had significant influence on the delivery and content of engineering programs both globally and particularly on Australia and yet the industrial profile of Australia has historically been significantly different from that of the US and UK. This paper first presents a study into the differences in industrial profile in the employment of mechanical engineers in the US, UK and Australia. This paper then presents key findings from a role-based study that identified the relative significance of a broad range of attributes for the most common mechanical engineering roles in the six industries that employ the greatest number of Australian mechanical engineers.