Comparative studies of structural transition between AlN nanocrystals and nanowires

The structural transition of AIN nanocrystals and nanowires were investigated simultaneously under pressures up to 37.2 GPa by in situ angle dispersive high-pressure x-ray diffraction using synchrotron radiation source and a single diamond anvil cell. The size of hexagonal AIN nanocrystals and the diameter of nanowires are 45 nm on average. A pressure-induced wurtzite to rocksalt phase transition starts at 21.5 GPa and completes at 27.8 GPa for the nanocrystals and nanowires, respectively. The high-pressure behaviors of AlN nanocrystals the same as the AIN nanowires might arise from the similar size and diameter in nanocrystals and nanowires. Hexagonal AIN nanocrystals (45 nm) display an apparent volumetric contraction as compared to the AlN nanocrystals (10 nm) which might induce the difference of transition pressure.

A comparative study of rhodopsin function in the great bowerbird (Ptilonorhynchus nuchalis): spectral tuning and light-activated kinetics

Rhodopsin is the visual pigment responsible for initiating the phototransduction cascade in vertebrate rod photoreceptors. Although well-characterized in a few model systems, comparative studies of rhodopsin function, particularly for non-mammalian vertebrates are comparatively lacking. Bowerbirds are rare among passerines in possessing a key substitution, D83N, at a site that is otherwise highly conserved among G protein-coupled receptors. While this substitution is present in some dim-light adapted vertebrates, often accompanying another unusual substitution, A292S, its functional relevance in birds is uncertain. To investigate functional effects associated with these two substitutions, we use the rhodopsin gene from the great bowerbird (Ptilonorhynchus nuchalis) as a background for site-directed mutagenesis, in vitro expression and functional characterization. We also mutated these sites in two additional rhodopsins that do not naturally possess N83, chicken and bovine, for comparison. Both sites were found to contribute to spectral blue-shifts, but had opposing effects on kinetic rates. Substitutions at site 83 were found to primarily affect the kinetics of light-activated rhodopsin, while substitutions at site 292 had a larger impact on spectral tuning. The contribution of substitutions at site 83 to spectral tuning in particular depended on genetic background, but overall, the effects of substitutions were otherwise surprisingly additive, and the magnitudes of functional shifts were roughly similar across all three genetic backgrounds. By employing a comparative approach with multiple species, our study provides new insight into the joint impact of sites 83 and 292 on rhodopsin structure-function as well as their evolutionary significance for dim-light vision across vertebrates.

Internationalisation of SMEs : European comparative studies

We examine new research on the internationalisation of Small and Medium-sized Enterprises (SMEs) in 27 European countries. We find that, in both established market economies and in transition economies, SME international entrepreneurship is driven by internal resources and capabilities, membership in networks or clusters, favourable government policies, economy, competitive market conditions, and industry structure. We then develop a conceptual model and propositions of the drivers of European SME internationalisation. Our findings have important implications for managers in improving their firms' international market performance.

Inflation and economic growth : a comparative analysis of Australia and the Philippines

Investigates the effects of inflation on economic growth in Australia and the Philippines using time-series data for each country. Uses time-series quarterly data sets covering the period 1970-1995 for Australia and 1950-1994 for the Philippines. A production function approach is used. Inflation was found to have a negative and statistically significant but differing impact on growth in both countries.

Utility of mitochondrial DNA sequences from four gene regions for systematic studies of Australian freshwater crayfish of the Genus Cherax (Decapoda: Parastacidae)

One of the most important requirements for systematic and phylogenetic studies is the identification of gene regions with the appropriate level of variation for the question of interest. Molecular phylogenetic and systematic studies of freshwater crayfish have made use of DNA sequences mainly from ribosomal genes, especially the 16S rRNA gene region. Thus, little information is available on other potentially useful mitochondrial gene regions for systematic studies in these animals. In this study, we look at nucleotide variation and phylogenetic relations within and between four species of freshwater crayfish of the genus Cherax from the southwest of Western Australia using four fragments amplified from the 16S rRNA, 12S rRNA, Cytochrome Oxidase I (COI), and Cytochrome b (Cyt b) gene regions. Samples of Engaeus strictifrons, Euastacus bispinosus, and Geocharax falcata were also sequenced for comparative purposes. The size of the fragments varied from 358 bp to 600 bp. Across all samples, the four fragments showed significant phylogenetic signal and showed similar proportions of variable sites (28.81–37.33%). Average divergence within species for the mitochondrial gene regions varied from 1.18% to 4.91%, with the 16S rRNA being the least variable and Cyt b the most variable. Average divergence between species ranged 7.63–15.53%, with 16S rRNA being the least variable and COI the most variable. At the generic level, average divergence ranged 17.21–23.82%. Phylogenetic analyses of the 16S rRNA, 12S rRNA, and COI regions generated four clades consistent with the presence of four species previously identified on the basis of allozyme and morphological studies. The relationships among samples were largely congruent across the data set, although some relationships remained unresolved. Not all samples could be amplified using the Cyt b primers, and some of those that were showed quite anomalous relationships, suggesting that one or more Cyt b pseudogenes were being amplified.

A comparative study of construction industry size and structure between the UK and Australia and the significance of industry fragmentation

While comparing both the size and structure between the UK and Australian construction industries, this study reveals that the UK construction industry is about two and a half times larger than the Australian construction industry, and both industries are dominated by the proportion of small firms. The issue of fragmentation is characteristic of the construction industries in these two countries, and beyond. This study then develops a self recruiting-subletting cost indifference point model to explain why fragmentation occurs. Although the high proportion of small firms in the construction industry has been criticised as it prevents the exploitation of economies of scale, the self recruiting-subletting cost indifference point model theoretically proposes that subletting is usually profitable for construction firms. Thus the size distribution of the construction industry has a propensity to skew towards small firms.

A comparative study of the contents of corporate codes of ethics in Australia, Canada and Sweden

This paper reports on and analyzes the contents of 197 corporate codes of ethics (78 Australian, 80 Canadian and 39 Swedish). Among other things, it was found that the contents of the Australian and Canadian codes were similar, reflecting the similar histories and cultures (as measured by Hofstede's dimensions) of these two countries. Further, the contents of the Swedish codes were found to be very different from the Australian and Canadian codes in some areas, reflecting the cultural differences between Sweden and the other two countries.

Ties to the past in organization research : a comparative analysis of retrospective methods

This paper addresses a traditionally neglected area of management and organizational studies—retrospective research. It identifies, describes and analyses four positions on retrospective research: Controlling the Past, in which attempts are made to maximize accurate recall or to reveal potential sources of error or bias; Interpreting the Past, in which understanding of the present is informed by the construction of past reality; Co-opting the Past, in which causal explanations link the past and the present; and Representing the Past, which involves the problematization of time and research on time. These positions are compared in terms of, for example, method, philosophy, examplars and potential contribution. Finally, implications are drawn for the practice of retrospective research in management and organization studies.

Reflective practice in teacher education : learning from case studies of environmental education

This book is focused on ten action research and evaluative case studies in environmental education carried out by teacher educators and teachers. The case studies range across five European countries: Austria, Hungary, Italy, Sweden and Switzerland. They are followed by cross-case comparisons which explore issues emerging from the documented reflective practice: aims of environmental education in the educational policy context of the countries, their relationship to the disciplines and the traditional knowledge transmission position, the role of action research approaches for innovation and reflection, and institutional conditions of collaboration in teacher education. This international case study project is research based in adopting professional development approaches that are informed by action research principles. It represents examples of innovation that challenge established practice in schools and teacher education institutions. It provides study material for all who attempt to describe, change and improve their own education practices and who want to adopt an action research approach to professional or program development.

Pedagogical templates : a comparative study of higher order reflective making

Schon’s notion of reflection-in-action implies a constructivist process of learning, especially valid in the teaching of professional disciplines such as architecture. Action becomes the instrument of conjecture and learning arises in the context of reflection upon the act. Such a process of interleaving action and reflection constitutes a “higher-order” process of reflective making. Research in design studies has shown that strategies for making differ markedly between professional and novitiate designers. Further, such studies have shown that skilled designers employ past experience and precedents to create context for new problem situations. To address the lack of context in novitiate learning situations, we propose the use of “pedagogical templates” for the promotion of “higher-order” strategies in design learning contexts for supporting beginning design students. We focus on the use of digital media, specifically for the design, implementation and delivery of constructive learning situations. This paper presents the use of a pedagogical template in the creation of constructivist contexts for two complementary courses, a traditional design studio and a computer modelling course at Deakin University. The resulting implications for design learning and the integration of physical and digital forms of making through the use of a pedagogical template are discussed.

A comparative study of banking in China and India, non-performing loans and the level playing field

It has become common in the literature to compare India and China, two remarkably growing economies, but these comparisons often do not take into account the institutional differences between these two countries. We have in this paper done a comparative analysis of banking institutions in China and India taking into accounts the contentious issue of nonperforming loans along with the issue of use of banks to provide countervailable subsidies to exporting organizations. Our research shows that the efficiency differences between banks in these two countries can be directly related to institutional difference and any comparative study between these countries not taking into consideration these institutional differences may lead to misleading results.

A comparative study of banking in China and India, nonperforming loans and the level playing field

It has become common in literature to compare India and China two remarkably growing economies but these comparisons often do not take into account the institutional differences between two countries. We have in this paper done a comparative analysis of banking institutions in China and India taking into accounts the contentious issue of nonperforming loans along with the issue of use of banks to provide countervailable subsidies to exporting organizations. Our research shows that the efficiency differences between banks in these two countries can be directly related to institutional difference between two countries and any comparative study between two countries not taking into consideration these institutional differences may lead to misleading results.

A comparative assessment of the information technology services sector in India and China

The purpose of this paper is to assess the nature of competition in the information technology (IT) services sector between India and China. Using primary and secondary data sources, we compare and contrast the strengths and weaknesses of the IT services sector in the two countries along the main dimensions of Porter’s competitive advantage model. The principal findings indicate that the IT services sectors in the two countries are distinctively different, have developed along different paths and are highly complementary to each other. China has a well established hardware sector and its IT services sector focuses mostly on servicing its domestic market. India’s IT services sector is predominantly export orientated with focus on the US and Western European markets. Contrary to popular beliefs, given the complementary characteristics of the IT services sectors in India and China, it is unlikely for the two countries to compete against each other in the near future and greater strategic co-operation between IT service providers in the two countries is a more likely outcome.