Objectifying early-number : a visual nomenclature to express mathematical domain knowledge

To address issues of divisive ideologies in the Mathematics Education community and to subsequently advance educational practice, an alternative theoretical framework and operational model is proposed which represents a consilience of constructivist learning theories whilst acknowledging the objective but improvable nature of domain knowledge. Based upon Popper’s three-world model of knowledge, the proposed theory supports the differentiation and explicit modelling of both shared domain knowledge and idiosyncratic personal understanding using a visual nomenclature. The visual nomenclature embodies Piaget’s notion of reflective abstraction and so may support an individual’s experience-based transformation of personal understanding with regards to shared domain knowledge. Using the operational model and visual nomenclature, seminal literature regarding early-number counting and addition was analysed and described. Exemplars of the resultant visual artefacts demonstrate the proposed theory’s viability as a tool with which to characterise the reflective abstraction-based organisation of a domain’s shared knowledge. Utilising such a description of knowledge, future research needs to consider the refinement of the operational model and visual nomenclature to include the analysis, description and scaffolded transformation of personal understanding. A detailed model of knowledge and understanding may then underpin the future development of educational software tools such as computer-mediated teaching and learning environments.

A visual description of early-number counting, addition and subtraction knowledge

Early-number is a rich fabric of interconnected ideas that is often misunderstood and thus taught in ways that do not lead to rich understanding. In this presentation, a visual language is used to describe the organisation of this domain of knowledge. This visual language is based upon Piaget’s notion of reflective abstraction (Dubinsky, 1991; Piaget, 1977/2001), and thus captures the epistemological associations that link the problems, concepts and representations of the domain. The constructs of this visual language are introduced and then applied to the early-number domain. The introduction to this visual language may prompt reflection upon its suitability and significance to the description of other domains of knowledge. Through such a process of analysis and description, the visual language may serve as a scaffold for enhancing pedagogical content knowledge and thus ultimately improve learning outcomes.

Everything

Everything (2008) is a looped 3 channel digital video (extracted from a 3D computer animation) that appropriates a range of media including photography, drawing, painting, and pre-shot video. The work departs from traditional time-based video which is generally based on a recording of an external event. Instead, “Everything” constructs an event and space more like a painting or drawing might. The works combines constructed events (including space, combinations of objects, and aesthetic relationship of forms) with pre-recorded video footage and pre-made paintings and drawings. The result is a montage of objects, images – both still and moving – and abstracted ‘painterly’ gestures. This technique creates a complex temporal displacement. 'Past' refers to pre-recorded media such as painting and photography, and 'future' refers to a possible virtual space not in the present, that these objects may occupy together. Through this simultaneity between the real and the virtual, the work comments on a disembodied sense of space and time, while also puncturing the virtual with a sense of materiality through the tactility of drawing and painting forms and processes. In so doing, te work challenges the perspectival Cartesian space synonymous with the virtual. In this work the disembodied wandering virtual eye is met with an uncanny combination of scenes, where scale and the relationships between objects are disrupted and changed. Everything is one of the first international examples of 3D animation technology being utilised in contemporary art. The work won the inaugural $75,000 Premier of Queensland National New Media Art Award and was subsequently acquired by the Queensland Art Gallery. The work has been exhibited and reviewed nationally and internationally.

Relics

Relics is a single-channel video derived from a 3D computer animation that combines a range of media including photography, drawing, painting, and pre-shot video. It is constructed around a series of pictorial stills which become interlinked by the more traditionally filmic processes of panning, zooming and crane shots. In keeping with these ideas, the work revolves around a series of static architectural forms within the strangely menacing enclosure of a geodesic dome. These clinical aspects of the work are complemented by a series of elements that evoke fluidity : fireworks, mirrored biomorphic forms and oscillating projections. The visual dimension of the work is complemented by a soundtrack of rainforest bird calls. Through its ambiguous combination of recorded and virtual imagery, Relics explores the indeterminate boundaries between real and virtual space. On the one hand, it represents actual events and spaces drawn from the artist studio and image archive; on the other it represents the highly idealised spaces of drawing and 3D animation. In this work the disembodied wandering virtual eye is met with an uncanny combination of scenes, where scale and the relationships between objects are disrupted and changed. Through this simultaneity between the real and the virtual, the work conveys a disembodied sense of space and time that carries a powerful sense of affect. Relics was among the first international examples of 3D animation technology in contemporary art. It was originally exhibited in the artist’s solo show, ‘Places That Don’t Exist’ (2007, George Petelin Gallery, Gold Coast) and went on to be included in the group shows ‘d/Art 07/Screen: The Post Cinema Experience’ (2007, Chauvel Cinema, Sydney) , ‘Experimenta Utopia Now: International Biennial of Media Art’ (2010, Arts Centre, Melbourne and national touring venues) and ‘Move on Asia’ (2009, Alternative space Loop, Seoul and Para-site Art Space, Hong Kong) and was broadcast on Souvenirs from Earth (Video Art Cable Channel, Germany and France). The work was analysed in catalogue texts for ‘Places That Don’t Exist’ (2007), ‘d/Art 07’ (2007) and ‘Experimenta Utopia Now’ (2010) and the’ Souvenirs from Earth’ website.

Phenological changes in six Australian subalpine plants in response to experimental warming and year-to-year variation

The likely phenological responses of plants to climate warming can be measured through experimental manipulation of field sites, but results are rarely validated against year-to-year changes in climate. Here, we describe the response of 1-5 years of experimental warming on phenology (budding, flowering and seed maturation) of six common subalpine plant species in the Australian Alps using the International Tundra Experiment (ITEX) protocol.2. Phenological changes in some species (particularly the forb Craspedia jamesii) were detected in experimental plots within a year of warming, whereas changes in most other species (the forb Erigeron bellidioides, the shrub Asterolasia trymalioides and the graminoids Carex breviculmis and Poa hiemata) did not develop until after 2-4 years; thus, there appears to be a cumulative effect of warming for some species across multiple years.3. There was evidence of changes in the length of the period between flowering and seed maturity in one species (P. hiemata) that led to a similar timing of seed maturation, suggesting compensation.4. Year-to-year variation in phenology was greater than variation between warmed and control plots and could be related to differences in thawing degree days (particularly, for E. bellidioides) due to earlier timing of budding and other events under warmer conditions. However, in Carex breviculmis, there was no association between phenology and temperature changes across years.5. These findings indicate that, although phenological changes occurred earlier in response to warming in all six species, some species showed buffered rather than immediate responses.6. Synthesis. Warming in ITEX open-top chambers in the Australian Alps produced earlier budding, flowering and seed set in several alpine species. Species also altered the timing of these events, particularly budding, in response to year-to-year temperature variation. Some species responded immediately, whereas in others the cumulative effects of warming across several years were required before a response was detected.

Melbourne on film dossier: 'Ghost Rider'

Despite being set in an unnamed Texan city, Ghost Rider (Mark Steven Johnson, 2007) was a landmark film for Melbourne. It was the first international production to be made at the Central City (now Docklands) Studios, much to the relief of the heavily-invested state government. And it demonstrated to the world (or more importantly, to producers resident in a small part of southern California), that the city was willing and available to be made over and made up to fit even (especially!) the most stupid filmmaking fantasies. Announcing the imminent arrival of the production in October 2004, the Herald Sun boldly predicted that '[c]ity lanes, Telstra Dome and the Yarra River will be the stars of the new action film'. In fact Melbourne is, as the filmmakers intended, (virtually) unidentifiable onscreen. For the Victorian State government, Ausfilm, Film Victoria and the Melbourne Film Office, this lack of specificity was something to be celebrated; a few months before Ghost Rider went in to production, the then State Minister for Innovation, John Brumby, declared that 'it's almost inconceivable that [Ghost Rider] won't put Melbourne on the map internationally'.

Extending Web Modeling Language to exploit stigmergy : intentionally recording unintentional trails

Software development and Web site development techniques have evolved significantly over the past 20 years. The relatively young Web Application development area has borrowed heavily from traditional software development methodologies primarily due to the similarities in areas of data persistence and User Interface (UI) design. Recent developments in this area propose a new Web Modeling Language (WebML) to facilitate the nuances specific to Web development. WebML is one of a number of implementations designed to enable modeling of web site interaction flows while being extendable to accommodate new features in Web site development into the future. Our research aims to extend WebML with a focus on stigmergy which is a biological term originally used to describe coordination between insects. We see design features in existing Web sites that mimic stigmergic mechanisms as part of the UI. We believe that we can synthesize and embed stigmergy in Web 2.0 sites. This paper focuses on the sub-topic of site UI design and stigmergic mechanism designs required to achieve this.

New graduate occupational therapists feelings of preparedness for practice in Australia and Aotearoa/New Zealand

Aim The development of competent future allied health professionals through academic programmes, professional support and practical education is continually evolving. The aim of this study was to explore the feelings of newly graduated occupational therapists in Australia and Aotearoa/New Zealand regarding their education and work preparedness. Methods Newly graduated occupational therapists from Australia (n = 178) and Aotearoa/New Zealand (n = 53) who had completed their occupational therapy studies in 2007 were recruited. Participants completed an online survey which explored their preparedness for work; based on professional competencies. Results Most newly graduated occupational therapists felt somewhat prepared for practice. However, only 17.1% of Australian new graduates, and even fewer (8.5%) of Aotearoa/New Zealand new graduates felt very well prepared. Participants felt more prepared for the competencies required for ‘managing inwards’ (including interpersonal skills) and less prepared for those required for ‘managing outwards’ (including evidence-based practice). Conclusions This study provides the first international comparison into the feelings of competence and preparedness for practice of new graduates of occupational therapy from Australia and Aotearoa/New Zealand. Given the importance of competencies, such as evidence-based practice to the progress of the profession, there is a need to further explore methods to increase feelings of preparedness in these areas.

Effects of wireless sensor network uncertainties on output-only modal analysis employing merged data of multiple tests

The use of Wireless Sensor Networks (WSNs) for Structural Health Monitoring (SHM) has become a promising approach due to many advantages such as low cost, fast and flexible deployment. However, inherent technical issues such as data synchronization error and data loss have prevented these distinct systems from being extensively used. Recently, several SHM-oriented WSNs have been proposed and believed to be able to overcome a large number of technical uncertainties. Nevertheless, there is limited research verifying the applicability of those WSNs with respect to demanding SHM applications like modal analysis and damage identification. This paper first presents a brief review of the most inherent uncertainties of the SHM-oriented WSN platforms and then investigates their effects on outcomes and performance of the most robust Output-only Modal Analysis (OMA) techniques when employing merged data from multiple tests. The two OMA families selected for this investigation are Frequency Domain Decomposition (FDD) and Data-driven Stochastic Subspace Identification (SSI-data) due to the fact that they both have been widely applied in the past decade. Experimental accelerations collected by a wired sensory system on a large-scale laboratory bridge model are initially used as clean data before being contaminated by different data pollutants in sequential manner to simulate practical SHM-oriented WSN uncertainties. The results of this study show the robustness of FDD and the precautions needed for SSI-data family when dealing with SHM-WSN uncertainties. Finally, the use of the measurement channel projection for the time-domain OMA techniques and the preferred combination of the OMA techniques to cope with the SHM-WSN uncertainties is recommended.

The suitability of using accumulated plastic strain to assess the damage at the rail-wheel interfaces

Numerous Abaqus [1] finite element analyses have been carried out using various plasticity models to investigate the effect of friction force on the rail head in relation to both the development of the accumulated plastic strain (PEEQ) and the changes in the depth of PEEQ distribution in the wheel-rail contact. The normal force distribution on the rail head was assumed to be Hertzian. The tangential force was implemented as a fraction of the normal force in the subroutine. Each analysis was carried out for a single pass and the effect of various friction coefficient values has been observed.

Young people and their struggle for youth citizenship

Young people and the question of rights of and to citizenship form a key site of contest and struggle in many societies. This paper advances the case for a more critical understanding of the concept of 'youth citizenship' and also the emergence and reemergence of this as a topical issue in certain socio-historical moments of crisis.

Positively playful : when videogames lead to player wellbeing

Videogames are an increasingly popular entertainment choice, yet we have a limited understanding of their potential wellbeing benefits. The current research used an online survey (N = 429) to investigate how gameplay choices and the psychological experience of gameplay impact on player wellbeing. Specifically, a hierarchical multiple regression was conducted to determine if, controlling for age and gender, current gameplay choices (amount of play, game genre, mode of play) and play experience (flow, psychological need satisfaction) predicted current wellbeing. Results indicated that age, social play, relatedness during gameplay and flow were positively associated with player wellbeing. Implications for our understanding of player wellbeing, as well as directions for future research are discussed.

Videogame reward types

This research has been conducted to ascertain the validity of existing videogame reward categorisations. An overview of current videogame reward types is provided and the need for further research in the area of videogame reward systems is identified. Possible limitations of the primary existing reward taxonomy are identified. We propose a definition of videogame rewards and present initial findings on a partially validated videogame reward taxonomy. Future games and gamified applications stand to benefit from a categorisation of videogame rewards, as videogame rewards play a pivotal role in player motivation.

Update on the inaugural Sydney Diabetic Foot Conference 2013

The first International Diabetic Foot Conference in Australia was hosted at Liverpool Hospital in Sydney during May 30-31, 2013. In response to the growing diabetes epidemic globally and more locally to Australia, the conference provided the perfect bridge for interaction between the multidisciplinary team members involved in diabetes care and the opportunity to assimilate the most up-to-date evidence-based medicine from some of the most respected researchers in the field.