Teaching Chinese, teaching in Chinese, and teaching the Chinese

This article examines specific issues encountered in various areas of Chinese teaching in Australia. These issues are linked to the spheres of language planning as acquisition and as recovery and language planning as retention (Lo Bianco, 10.1007/s10993-006-9042-3). Specifically relevant to Chinese in Australia is its current prominence in formally declared national language policy, its changing status over time and its similarities and differences with Chinese in the United States (Wang, 10.1007/s10993-006-9043-2). The internationalization of education, and its commodification, has in recent years led to a major expansion in the range of offerings in Chinese in Australia, now catering to growing, and in some institutions to numerically dominant, groupings of native speakers with radically different language and academic needs from the traditional clientele of tertiary and school Chinese programs.

The social consequences of 'how the sibling died' for bereaved young adults

Research into how the 'type' of sibling death impacts surviving siblings at a social level was conducted using a semi-structured interview format with 25 bereaved siblings and seven counsellors. The results indicated that in cases where a sibling's death had a greater impact within public spheres, the young adult was more likely to receive beneficial social support than young adults associated with 'private' death examples. The paper concludes by outlining how individuals can provide effective support for bereaved young adults, as well as avoid unhelpful support behaviours.

The effect of artificial defects on the compressive properties of hollow sphere cellular aluminium (HSCA)

Hollow sphere cellular aluminium (HSCA) samples were fabricated by bonding together two kinds of single aluminium hollow spheres with the same outside diameter of 4 mm but different wall thicknesses of 0.1 mm and 0.3 mm, in which the hollow spheres with the thinner sphere wall thickness were used as artificial defects. Four types of HSCA samples with the same relative density but various distributions of artificial defects were prepared by simple cubic packing. For comparing, HSCA sample without defective hollow spheres inside was also prepared. The effects of the distribution of the artificial defects on the deformation behaviours and mechanical properties were investigated by compressive tests. Results indicated that the nominal stress - nominal strain curve and the deformation behavior of the HSCA samples varied with the distribution of the artificial defects in spite of the same relative density. It is therefore suggested that the deformation behavior and mechanical property of cellular materials were also significantly affected by the distribution of defects. In particular, the plateau stress of the HSCA samples increased with the decrease in number of contact points between the normal hollow spheres and the defective hollow spheres in the loading direction during deformation.

Compressive properties and energy absorption of hollow sphere aluminium

Manufactured cellular aluminums have been developed for a wide range of automotive applications where weight savings, improved safety, crashworthiness and comfort are required. The plateau deformation behavior of cellular aluminums under compressive loading makes this new class of lightweight materials suitable for energy absorption and comes close to ideal impact absorbers. In the present study, aluminum hollow hemispheres were firstly processed by pressing. Hollow sphere aluminum samples with a body-centered cubic (BCC) packing were then fabricated by bonding together single hollow spheres, which were prepared by adhering together hollow hemispheres. Hollow sphere aluminum samples with various kinds of sphere wall thicknesses of 0.1 mm, 0.3 mm and 0.5 mm but the same outside diameter of 4 mm were investigated by compressive tests. The effects of the sphere wall thickness on the mechanical properties and energy absorption characteristics were investigated.

Processing and mechanical properties of hollow sphere aluminum foams

Hollow sphere metallic foams are a new class of cellular material that possesses the attractive advantages of uniform cell size distribution and regular cell shape. These result in more predictable physical and mechanical properties than those of cellular materials with a random cell size distribution and irregular cell shapes. In the present study, single aluminum hollow spheres with three kinds of sphere wall thickness as 0.1 mm, 0.3 mm and 0.5 mm were processed by a new pressing method. Hollow sphere aluminum foam samples were prepared by bonding together single hollow spheres with simple cubic packing (SC) and body-centered cubic packing (BCC). Compressive tests were carried out to evaluate the deformation behaviors and mechanical properties of the hollow sphere aluminum foams. Effects of the sphere wall thickness and packing style on the mechanical properties were investigated.

Cosmopolitanism, identity and recognition

An application of the social theory of Axel Honneth to global justice, arguing that development goals must include provision for the intersubjective recognition required for identity formation. In the disciplines of Political Philosophy and International Relations cosmopolitanism is often defined as the view that all people, no matter their national, ethnic or religious backgrounds and no matter what their gender, have an equal moral status. The most telling enunciation of this view is the United Nations’ Universal Declaration of Human Rights. However, the focus that is given to rights and a global form of legal equality by this document and by such theorists as John Rawls is not rich enough to capture all of the ethical demands that global society places upon well-to-do Westerners and developed nations. This paper makes use of a thesis by Axel Honneth to the effect that political thinking needs “a basic conceptual shift to the normative premises of a theory of recognition that locates the core of all experiences of injustice in the withdrawal of social recognition, in the phenomena of humiliation and disrespect.” Honneth identifies three spheres of recognition in modern societies: love, law, and achievement. I offer some exposition of his theory and then argue that global justice must be understood to embrace the substantive ethical values that arise in these three spheres as well as the procedural standards of moral rightness that belongs to the second of them. Such an expanded conception of global justice will yield an enriched conception of cosmopolitanism.

Commercial sex work, survival sex, sexual violence and HIV/AIDS prevention in Arumeru District, Arusha region Of Tanzania

Objective: To examine the knowledge and practices about HIV/AIDS among female Tanzanian commercial sex workers (CSWs) and assess the contextual dynamics that prevent safer sexual behaviours.

Method: The study used mixed methods and was implemented in two phases. Phase one assessed the knowledge and practices about HIV/AIDS among CSWs. Data were obtained with 54 CSWs, who were selected by using a snowball sampling approach. Semi-structured, face-to-face interviews with the CSWs were undertaken to allow the research participants to describe and discuss their lived realities as they perceive and experience them. In phase two, three discrete focus group discussions, each comprising 6-10 women, were carried out with 26 of the 54 CSWs who were interviewed in phase one.

Results: There was exploitation and inequity in the women's lives due to the multiple and overlapping oppressions of poverty and patriarchy. Sexual violence was framed, legitimised and reinforced by structural and cultural inequities. Such exploitation impacted not only on CSWs' lives as sex workers, but on their previous and/or simultaneous lives as mothers, wives, girlfriends and daughters. The women practised ‘survival sex’ as CSWs and/or sexual partners of men, and experienced sexual violence from their clients/partners. This violence was either culturally legitimised within a patriarchal framework or manifested itself as ‘displaced aggressive sex’ by men experiencing marginalisation in socio-economic spheres.

Reducing the photocatalytic activity of zinc oxide quantum dots by surface modification

The use of zinc oxide (ZnO) nanoparticles as ultraviolet (UV) absorbers for many organic substrates is limited because of the high photocatalytic activity of ZnO. In this study, a facile and efficient technique for the preparation of a hybrid material of silica-coated ZnO nanoparticles was used to reduce the photocatalytic activity of ZnO. Monodispersed ZnO nanopartcles were prepared by wet chemistry and the particle surface was modified by tetraethylorthosilicate to form a silica coating via the Sto¨ ber method. ZnO samples, both before and after the coating process, were investigated by transmission electron microscopy, X-ray diffraction, dynamic light scanning, infrared, and UV-Vis absorption spectroscopy. The effect of the surface modification on the photocatalytic activity of ZnO was studied by monitoring the degradation of Rhodamine B caused by photo-generated free radicals. The results implied that the photo-generation of free-radicals was strongly quenched by the presence of silica on the particle surface.

Flux-assisted self-assembly of monodisperse colloids

We have developed a novel method to grow ordered layers of monodisperse colloids on a flat substrate. The evaporation of the colloidal suspension in the presence of the inclined substrate is strengthened by an external gas flux directed on the meniscus. The meniscus oscillations caused by the gas flux have an evident effect on the ordering of the spheres on the substrate. Thick films (more than 150 layers in a single-step deposition) of large area single crystals (1 cm2) can be obtained in a very short time (~1 cm/h maximum growth rate) and from very diluted suspensions (up to 0.022% volume fraction).

Inverse opal structure of SnO2 and SnO2 : Zn for gas sensing

In the present work, we propose a low cost synthetic sol-gel route that allows to produce high quality oxide nanostructures with inverse opal architecture which, transferred on alumina substrates provided with Pt interdigitated contacts and heater, are tested as gas sensing devices. An opal template of sintered monodisperse polystyrene spheres was filled with alcoholic solutions of metal oxide precursors and transferred on the alumina substrate. The polystyrene template was removed by thermal treatment, leading to the simultaneous sintering of the oxide nanoparticles. Beside SnO₂, a binary oxide well known for gas sensing application, a Zn containing ternary solid solution (SnO₂:Zn, with Zn 10% molar content) was taken into account for sensor preparation. The obtained high quality macro and meso-porous structures, characterized by different techniques, were tested for pollutant (CO, NO₂) and interfering (methanol) gases, showing that very good detection can be reached through the increase of surface area offered by the inverse opal structure and the tailoring of the chemical composition. The electrical characterization performed on the tin dioxide based sensors shows an enhancement of the relative response towards NO₂ at low temperatures in comparison with conventional SnO₂ sensors obtained with sputtering technique. The addition of Zn increases the separation between the operating temperatures for reducing and oxidizing gases and results in a further enhancement of the selectivity to NO₂ detection.

Reinvigorating the public sphere : the role of voluntary associations

This thesis examines the key question: can voluntary associations enhance democracy? It tests critical claims made by Habermas and others that voluntary associations have the potential to reinvigorate a public sphere in a state of atrophy. The thesis outlines the major theoretical arguments pertaining to these areas and then presents the results of empirical work within voluntary organisations. Specifically the thesis: Critically examines the concept of the public sphere, being a sphere between the state and civil society and investigates why theorists have advocated voluntary associations, claimed to be the core institutions of civil society, as sites where democratic ideals can be secured; Goes on to examine the concept of civil society and reviews the recent literature that has attempted to define and analyse the role of voluntary associations in contemporary society; Tests empirically the normative ideals that have been advocated on behalf of voluntary associations through the presentation of data obtained using qualitative methodology. The analysis of the data collected during interviews with key employees and members of six voluntary associations in Melbourne, Australia allows for a more informed knowledge regarding the key concepts and themes of the thesis. The thesis ends by directly addressing the following points: whether or not the public sphere is in a state of atrophy; the particular nature of voluntary associations contemporary engagement in the public sphere; and whether voluntary associations can indeed, be sites where democracy can be enhanced and democratic ideals be secured. It is concluded that voluntary associations operate within Habermasian public spheres, counterspheres, and postmodern public spheres and that unitary notions of the public sphere, such as those Habermas proposes, do not adequately explain voluntary associations engagement in the public sphere. Accordingly, it is concluded that voluntary associations have the potential to invigorate public spheres, though not in ways that many theorists writing on the subject suggest.

Studies of hypervalent organotin complexes and organotin clusters

(119)Sn, (31)P and (13)C variable temperature NMR spectroscopies have been used to examine the effective coordination spheres in solution of a series of hypervalent organotin(IV) dithiolate compounds RnSnXm(S-S)4-n-m where R = Ph, Me, nBu, tBu; X = Cl, Br; (S-S) = S2CNR'2, S2COR', S2P(OR')2 (R' = Me, Et, iPr) and n = 1, 2, 3; m = 0,1,2. Stereochemical nonrigidity is a common phenomenon found for these hypervalent compounds. On the basis of heteronuclear NMR data and X-ray crystallographic data, dynamic behaviors of these hypervalent compounds have been established. The system of hypervalent organotin(IV) fluoride complexes has also been investigated by variable temperature heteronuclear NMR techniques. A series of monomeric pentacoordinate complexes [RnSnC1mF5-n-m]-(R = Ph, Me, nBu, tBu; n = 2, 3; m - 0, 1, 2, 3) and dimeric complexes [(Me3SnX)F(Me3SnX')]- (X = F, Cl; X' = F, Cl) and hexacoordinate complexes [RnSnClmF6-n.m]2- (R = Ph, Me, nBu; n = 1, 2; m = (X 1, 2, 3,4) are identified in solution. The fluoride is of higer affinite to tin than the chloride. The stereochemistry and dynamic behavior of these complexes in solution has been studied. Fluoride ion may induce phenyl group disproportionation of phenyhin(IV) compounds. It is also found that in pentacoordinate diorganotin complexes, such as [Ph2SnCl2F]- and [Ph2SnClF2]- fluorine can be less apicophilic than chlorine. Studies of stereochemistry and dynamic behavior of bi-functional Lewis acid bis(haloorganosiannes) have also been carried out. The bis(haloorganostannes) exhibit strong chelate ability towards halide, with high selectivity on fluoride, forming heterocyclic chelating rings, the stability of which depend on the ring size. In further exploration of the Lewis acidity of organotin(IV) halides, complexation of organotin(IV) halides with bis(tertiary phosphinc) ligands has been studied by 119Sn and 31P NMR spectroscopy and X-ray crystallography. The phenyl group disproportionation is often observed in the complexation reaction. Furthermore, organotin(IV) clusters such as [(RSn)12O14(OH)6]Cl2-2H2O (R = iPr, nBu) have been successfully prepared by base hydrolysis of RSnCl3. These clusters contain 12 tin atoms in one molecule and the cores of the clusters are dications. Other organotin clusters such as [nBuSn(O)O2CCH3]6 and [(nBuSn(OH)O2PPh2)3][O2PPh2) are readily formed by reaction of the 12-tin-atom cluster with an appropriate acid. The reactivity of and interconversion between organotin(FV) clusters have also been studied.

Leading lights : the promotion of garden suburb plans and planners in interwar Australia

This thesis explores interwar town planning in Australia, focusing on the period of large-scale urban expansion in the 1920’s. It problematises aspects of Australia’s urban planning history, particularly the 1920s ‘garden suburb. It also investigates the question of the use of international planning ideas in Australia, and the assertion or creation of authority by the Australian planning movement. The thesis additionally investigates the use of authoritative planning rhetoric for commercial or creative advantage. The thesis argues that the majority of innovative planning projects in the interwar years took place in the formation and foundation of the garden suburb. It shows that the garden suburb – assumed in much planning history to be an inferior form of Ebenezer Howard’s ‘garden city’ ideal – has, in fact, a number of precedents in 19th century Australian suburbia, some of which were retained in 20th century commercial estate design. Much of the Australian town planner’s authority at this time required recognition and awareness of the interests and needs of the general public, as negotiated through land vendors. As Australians looked to the future, and to the US for guidance, they were invited to invest in speculative real estate development modelled on this vision. The thesis concentrates primarily on the lives, careers and work of the British-Australian architect-planner Sir John Sulman; the Chicagoan architect-planners Marion Mahony and Walter Burley Griffin; and the Australian surveyor-planner Saxil Tuxen. These individuals were among the most prominent planners in Australia in the interwar years. All designed Australian garden suburbs, and combined advocacy with practice in private and public spheres. The thesis examines images and personas, both generic and individual, of the planner and the vendor. It shows that the formulation of the garden suburb and design practices, and the incorporation of international elements into Australian planning, are important in the creation of planning practice and forms. It also outlines the way these continue to have significant impact, in diverse and important ways, on both the contemporary built environment and planning history itself.

Superhydrophobic polyimide films with a hierarchical topography : combined replica molding and layer-by-layer assembly

Artificial superhydrophobic surfaces with a hierarchical topography were fabricated by using layer-by-layer assembly of polyelectrolytes and silica nanoparticles on microsphere-patterned polyimide precursor substrates followed with thermal and fluoroalkylsilane treatment. In this special hierarchical topography, micrometer-scale structures were provided by replica molding of polyamic acid using two-dimensional arrays of polystyrene latex spheres as templates, and nanosized silica particles were then assembled on these microspheres to construct finer structures at the nanoscale. Heat treatment was conducted to induce chemical cross-linking between polyelectrolytes and simultaneously convert polyamic acid to polyimide. After surface modification with fluoroalkylsilane, the as-prepared highly hydrophilic surface was endowed with superhydrophobicity due to the bioinspired combination of low surface energy materials and hierarchical surface structures. A superhydrophobic surface with a static water contact angle of 160 degrees and sliding angle of less than 10 degrees was obtained. Notably, the polyimide microspheres were integrated with the substrate and were mechanically stable. In addition, the chemical and mechanical stability of the polyelectrolyte/silica nanoparticle multilayers could be increased by heat-induced cross-linking between polyelectrolytes to form nylon-like films, as well as the formation of interfacial chemical bonds.

Numerical analysis of heat transfer and the optimisation of regenerators

To optimize a regenerator’s structure and its operation parameters and, consequently, to increase the efficiency of heat recovery and to save energy, a computational approach is used to study the unsteady three-dimensional flow and heat transfer. The simulation is performed in two steps. In the first step, the gas flow and heat transfer in a typical sphere-bed unit is simulated to deduce a dimensionless equation of heat transfer between gas and sphere. In the second step, a model is developed to simplify the prototype and to simulate the gas flow and heat transfer in the whole regenerator. The heat exchange process in regenerators and the effects of the regenerator’s structure and operation parameters, such as gas mass flux, reversal time, regenerator height, sphere diameter, and thermophysical properties of the spheres, are studied with the model to determine efficiency of heat recovery.