International contact lens prescribing in 2009

This is the eighth consecutive year that we have presented data from a survey of international contact lens prescribing in Contact Lens Spectrum. In this article we report on an assessment of 25,801 fits across 28 contact lens markets located in North America, Europe, the Middle East, Asia, and Africa. As in previous years, we opted for a prospective approach to this work. Up to 1,000 survey forms were randomly disseminated in each market to contact lens practitioners (ophthalmologists, optometrists, and/or opticians depending on the market), and information about the first 10 patients prescribed with lenses after receipt of paper or electronic survey forms was anonymously recorded.

The science behind the “stain”

It has been almost fi ve years since I fi rst published the article entitled “Much Ado About Staining” in Review of Optometry, which explored what we really knew in 2006 about the relationship between “corneal staining” and contact lens multipurpose solutions (MPS). This was published just prior to the controversial “staining grid.” While the Grid showed MPS-associated hyperfl uorescence under the slitlamp at two hours, it did not explain the “what” or “why” behind it; even so, many proponents of the Grid continue to suggest that it shows us which solution/lens combinations are “biocompatible” and which are not. New evidence suggests that the preservative-associated transient hyperfl uorescence (or PATH) observed at two hours after lens insertion is a benign phenomenon due to an interaction between fl uorescein, MPS preservatives, and corneal cell membranes. The misinterpretation of PATH as “real” corneal staining, like that observed in pathological conditions, may be due in part to the fact that there is not a lot of teaching regarding the true properties of fl uorescein and what is actually occurring when we see either PATH or corneal staining. To discuss the science of fl uorescein, corneal staining, and PATH, I have asked some of the preeminent research experts in the study of fl uorescence spectroscopy and corneal staining from around the world to share their new research and personal opinions on these topics...

The science of compliance

A survey conducted in Australia and the Asian region of the way in which contact lens wearers use and maintain their lenses reveals disturbingly low levels of compliance with recommended practice. Key problem areas are identified, and a plea is made for practitioners to help reverse this trend.

Working towards a ‘thirdspace’ in the teaching of writing to middle years students

The teaching of writing, particularly in the middle years of schooling, is impacted on by converging, and at times, contradictory pedagogical spaces. Perceptions about the way in which writing should be taught are clearly affected by standardised testing regimes in Australia. That is, much writing is taught as a genre process, yet results on standardised tests such as National Assessment Program in Literacy and Numeracy (NAPLAN) show that the writing component consistently receives the lowest scores (ACARA, 2013. Research shows that creative and individualised approaches are necessary for quality writing (Grainger, Goouch & Lambirth, 2005). This paper investigates the writing practices of students in years 5 to 7 in two culturally and linguistically diverse schools. It shows that the writing practices of these students are greatly influenced by teachers’ perceptions about what is required by external testing bodies such as the Australian Curriculum, Assessment and Reporting Authority (ACARA). The paper will then highlight how socio-spatial theory (Lefebvre, 1991) can be applied to explain these practices and offers the notion of a more productive ‘thirdspace’ (Soja, 1996) for improvement in the teaching of writing.

Participation in science and technology : young people's achievement-related choices in late modern societies

Young people’s participation in science, technology, engineering and mathematics (STEM) is a matter of international concern. Studies and careers that require physical sciences and advanced mathematics are most affected by the problem and women in particular are under-represented in many STEM fields. This article views international research about young people’s relationships to, and participation in, STEM subjects and careers through the lens of an expectancy value model of achievement-related choices. In addition it draws on sociological theories of late-modernity and identity, which situate decision-making in a cultural context. The article examines how these frameworks are useful in explaining the decisions of young people – and young women in particular – about participating in STEM and proposes possible strategies for removing barriers to participation.

Islamic contributions to the International Organization for Science and Technology Education (IOSTE)

This presentation introduces the International Organization for Science and Technology Education (IOSTE), outlining its history, structure, principles and activities. It discusses the role of IOSTE as a values-oriented STE research organization established in response to cold war ideologies with the aim of encouraging dialogue and academic exchange. The presentation then highlights the recent engagement of IOSTE with STE in predominantly Muslim countries. It examines quantitatively and qualitatively the increasing contributions from researchers in these countries, and outlines possible future engagements which could lead to closer research collaborations and relationships between STE academics in Muslim and non-Muslim countries.

Starting out in STEM : a study of young men and women in first year science, technology, engineering and mathematics courses

In late 2011, first year university students in science, technology, engineering and mathematics (STEM) courses across Australia were invited to participate in the international Interests and Recruitment in Science (IRIS) study. IRIS investigates the influences on young people's decisions to choose university STEM courses and their subsequent experiences of these courses. The study also has a particular focus on the motivations and experiences of young women in courses such as physics, IT and engineering given the low rates of female participation in these fields. Around 3500 students from 30 Australian universities contributed their views on the relative importance of various school and non-school influences on their decisions, as well as insights into their experiences of university STEM courses so far. It is hoped that their contributions will help improve recruitment, retention and gender equity in STEM higher education and careers.

The tertiary debate : a case study analysis of factors considered when applying for university entry by traditional age school leavers in Brisbane

Many interacting factors contribute to a student's choice of a university. This study takes a systems perspective of the choice and develops a Bayesian Network to represent and quantify these factors and their interactions. The systems model is illustrated through a small study of traditional school leavers in Australia, and highlights similarities and differences between universities' perceptions of student choices, students' perceptions of factors that they should consider and how students really make choices. The study shows the range of information that can be gained from this approach, including identification of important factors and scenario assessment.

School nurses and partnerships for health education : team teaching in the secondary school curricula

The purpose of this research is to examine School Based Youth Health Nurses experience of partnerships for health education and team teaching. The School Based Youth Health Nurse Program is a contemporary model of school nursing in Queensland, Australia. The role of the School Based Youth Health Nurse consists of individual health consultations and health promotion. This research analyses a subset of qualitative data collected for a larger project about the experience of school based youth health nursing. The Health Promoting Schools model is used as a deductive framework. The findings reveal five subthemes across the three areas of the Health Promoting Schools approach. There are two subthemes within the curriculum, teaching and learning area; We were on the same page so to speak and I can go and do my reports or whatever. There are two sub-themes within the partnerships and services area; I had a beautiful science teacher who was just delightful and really just wanted to do things in partnerships and It’s all airy fairy arty farty stuff that’s not important. There is one theme in the school organisation, ethos and environment area; I just don’t know how well the top of these organisations communicate with the bottom of those organisations. Successful partnerships for health education and team teaching between school nurses and teachers are based on personal relationships based on rapport which lead to trust and reciprocity. Partnerships are limited by teachers understanding of the role of the school nurse and engagement with school nurses in the classroom. Administrative support from the top down is fundamental.

Development of optical ray tracing model of a standard parabolic trough collector

Parabolic trough concentrator collector is the most matured, proven and widespread technology for the exploitation of the solar energy on a large scale for middle temperature applications. The assessment of the opportunities and the possibilities of the collector system are relied on its optical performance. A reliable Monte Carlo ray tracing model of a parabolic trough collector is developed by using Zemax software. The optical performance of an ideal collector depends on the solar spectral distribution and the sunshape, and the spectral selectivity of the associated components. Therefore, each step of the model, including the spectral distribution of the solar energy, trough reflectance, glazing anti-reflection coating and the absorber selective coating is explained and verified. Radiation flux distribution around the receiver, and the optical efficiency are two basic aspects of optical simulation are calculated using the model, and verified with widely accepted analytical profile and measured values respectively. Reasonably very good agreement is obtained. Further investigations are carried out to analyse the characteristics of radiation distribution around the receiver tube at different insolation, envelop conditions, and selective coating on the receiver; and the impact of scattered light from the receiver surface on the efficiency. However, the model has the capability to analyse the optical performance at variable sunshape, tracking error, collector imperfections including absorber misalignment with focal line and de-focal effect of the absorber, different rim angles, and geometric concentrations. The current optical model can play a significant role in understanding the optical aspects of a trough collector, and can be employed to extract useful information on the optical performance. In the long run, this optical model will pave the way for the construction of low cost standalone photovoltaic and thermal hybrid collector in Australia for small scale domestic hot water and electricity production.

Organo-LDH synthesized via tricalcium aluminate hydration in the present of Na-dodecylbenzenesulfate aqueous solution and subsequent investigated by near-infrared and mid-infrared

Na-dodecylbenzenesulfate (SDBS), a natural anionic surfactant, has been successfully intercalated into a Ca based LDH host structure during tricalcium aluminate hydration in the presence of SDBS aqueous solution (CaAl-SDBS-LDH). The resulting product was characterized by powder X-ray diffraction (XRD), mid-infrared (MIR) spectroscopy combined with near-infrared (NIR) spectroscopy technique, thermal analysis (TG–DTA) and scan electron microscopy (SEM). The XRD results revealed that the interlayer distance of resultant product was expanded to 30.46 Å. MIR combined with NIR spectra offered an effective method to illustrate this intercalation. The NIR spectra (6000–5500 cm−1) displayed prominent bands to expound SDBS intercalated into hydration product of C3A. And the bands around 8300 cm−1 were assigned to the second overtone of the first fundamental of CH stretching vibrations of SDBS. In addition, thermal analysis showed that the dehydration and dehydroxylation took place at ca. 220 °C and 348 °C, respectively. The SEM results appeared approximately hexagonal platy crystallites morphology for CaAl-SDBS-LDH, with particle size smaller and thinner.