Observation of deformation modes in Mg-3Al-1Zn

Since magnesium alloys are the lightest metallic materials, they are very attractive for automotive and aerospace industries. The main problem of these alloys is limited ductility due to a shortage of independent slip systems. In order to improve the formability in these alloys, an understanding of the deformation modes is required. In the present work, different slip systems were investigated in rolled Mg-3Al-IZn by means of in situ tensile tests in the SEM. These permitted electron backscatter diffraction (EBSD) and electron backscatter diffraction imaging (QBSD) to be carried out during the test. The results show that non-basal slip systems are active at room temperature.

Students` perceptions of study modes

This paper reports on a survey of how Australian undergraduate students perceive the benefits of broad study modes: face-to-face classes, web-based study, and print-based study. Two benefit types were identified through factor analysis: engagement and functionality. Respondents rated face-to-face classes highest on engagement and print-based study highest on functionality. However, they distinguished only marginally between the engagement and functionality benefits of print-based and web-based study. Two variables associated with differences in students' perceptions of study modes were attendance mode and student tenure. The findings raise questions about the learning and marketing rationales for offering web-based delivery of educational programmes at the expense of both the traditional face-to-face experience and the traditional “distance” experience in Australia using print materials.

The impact of teaching models, group structures and assessment modes on cooperative learning in the student design studio

As a result of ever diminishing teaching resources, an increasing number of architectural educators are setting group design projects, rather then spreading their time thinly over a large number of individual projects. This allows them to co-ordinate longer and more in-depth review sessions on a smaller number of assignment submissions. However, while the group
model may offer an authentic learning model by reflecting design in practice, the approach is not without its obvious shortcomings as a teaching archetype for the assessment of the knowledge and skill competencies of individual students. Hence, what is clear is the need for a readily adoptable andragogy for the teaching and assessment of group design projects.
The following paper describes the background, methodology and findings of a Strategic Teaching and Learning Grant funded research project carried out in the year 2005 at the School of Architecture and Building at Deakin University. The project aimed to inform a change of classroom/studio practice governing the assemblage, teaching and assessment of student design teams. The development through these changes of cooperative and student centred learning principles focused on effective design collaboration and fair assessment should, it will be argued, lead to an enhanced group-learning experience in studio, which will subsequently and ultimately enhance professional practice.

EBSD analysis of deformation modes in Mg-3A1-1Zn

Wrought magnesium alloys exhibit poor cold formability and the accepted explanation is the shortage of independent slip systems. In order to improve the formability in these alloys, an understanding of the deformation modes is required. In the present work, activation of different slip and twinning systems are investigated in rolled Mg–3Al–1Zn using electron back scattering diffraction. Analysis was performed on deformed surfaces and on metallographically prepared cross-sections following deformation at room temperature. The results reinforce the importance of prismatic slip and c-axis compression double twinning.

Correlates of student satisfaction with study modes

Research into the outcomes for students of different study modes has generally concluded that there is ‘no significant difference’ between outcomes for students studying face-to-face and for those studying by a variety of distance or flexible means. As the shift towards CIT-based and independent learning for oncampus students accelerates, it is important to establish how student outcomes are affected. This paper reports on a survey of the experiences and satisfaction of oncampus students with different learning environments and compares the satisfaction of those students who have experienced both on- and off-campus study. These comparisons were made based on students’ employment status and their reasons for studying off-campus. The findings revealed that students were significantly less satisfied with their off-campus than on-campus experience regardless of their work status. Further, the results indicate an association between students’ satisfaction with off-campus study and their reasons for studying off-campus. Given the evidence provided in this paper in support of face-to-face learning environments for ‘conventional’ on-campus students, both academics and administrators have an interest in ensuring that it remains central to the higher education experience of current and future students.

Teaching and learning: flexible modes and technology applications

Australian universities face many challenges In providing postgraduate midwifery education opportunities for registered nurses, particularly for those residing in rural areas. This paper will describe the measures implemented by a team of midwifery academics of Deakin university, Melbourne campus, specifically for units of study within the Graduate Diploma of Midwifery. As a consequence of these measures, student travel to a campus of the university and separation from their families and communities have been reduced. These innovative measures include a blended teaching approach incorporating face-to-face and online teaching consisting of Deakin Studies Online based in Web CT Vista, and Elluminate Live, an interactive online synchronous communication tool. Over the past 20 years in Australia, Deakin university has led the way in computer mediated learning methods and the challenge was to provide appropriate teaching strategies for course content to meet the requirements of the regulatory authority, the Nurses Board of Victoria (NBV), while promoting pedagogical methods of teaching and learning.

Crushing modes of aluminium tubes under axial compression

A numerical study of the crushing of circular aluminium tubes with and without aluminium foam fillers has been carried out to investigate their buckling behaviours under axial compression. A crushing mode classification chart has been established for empty tubes. The influence of boundary conditions on crushing mode has also been investigated. The effect of foam filler on the crushing mode of tubes filled with foam was then examined. The predicted results would assist the design of crashworthy tube components with the preferred crushing mode with the maximum energy absorption.

G-CSF: function and modes of action (Review)

Since the observations in the 1960s that granulocyte-colony stimulating factor (G-CSF) stimulated the proliferation of granulocytic cells in semisolid cultures of bone marrow cells, G-CSF has established itself as a useful clinical agent for increasing levels of neutrophilic granulocytes. However, these early findings did not firmly establish whether G-CSF is a genuine regulator of granulocyte formation under normal physiological conditions or rather acts as an emergency regulator, playing an important role only under stress conditions. The advent of <gene-knockout technology> has allowed us to evaluate these questions in a physiological setting through analysis of mice with a targeted mutation of G-CSF or its receptor, while the development of relevant cell models has enabled us to dissect the molecular basis of G-CSF action. This review discusses our current state of knowledge regarding the role of G-CSF in granulopoiesis.

Australian businesses in China : examining motivations and influences on entry modes for service providers

Purpose : The purpose of this paper is to examine the explanatory power of internationalisation theory for service firms internationalising into China.

Design/Methodology/Approach : Interviews were conducted with Australian based 23 service businesses that had entered China. Internationalisation theory was examined in this research. A number of constructs were investigated, which included the type of service (hard or soft), internationalisation motivation/pathways, previous international experience and whether companies plan or not. A number of propositions were tested in relation to these constructs.

Findings : The research found that soft services were more likely to choose full control modes, and hard services choose lower control modes. The most common motivation for entering China was to seek markets there, and these resulted in lower involvement modes. There was no relationship found between having international experience and entry mode, and it was found that businesses with low levels of planning still engaged high control modes. Internationalisation theory was partially supported in the research and was found to correctly predict the progression of equity in Chinese businesses owned by Australian companies.

Research Limitations/Implications : The limitation of the research was the small sample size, and future research should consider the constructs over a larger sample.

Practical Implications : The implications for other Australian service businesses is they should consider the type of service they have (hard or soft), and then make appropriate entry mode choices.

Originality/Value : There is limited research on the internationalisation of service businesses, and no other research has examined Australian service providers going to China.

EBSD analysis of deformation modes in Mg-3Al-1Zn

Researches the use of the electron back scattered diffraction analysis (EBSD) technique in investigating deformation modes in the magnesium alloy Mg-3Al-1Zn. Results showed the importance of non-basal slip, compression and double twinning during deformation of rolled Mg-3Al-1Zn. In as-cast material, twinning behaviour was more varied and complicated and could even occur upon unloading.