Detection of curved edges at subpixel accuracy using deformable models

One approach to the detection of curves at subpixel accuracy involves the reconstruction of such features from subpixel edge data points. A new technique is presented for reconstructing and segmenting curves with subpixel accuracy using deformable models. A curve is represented as a set of interconnected Hermite splines forming a snake generated from the subpixel edge information that minimizes the global energy functional integral over the set. While previous work on the minimization was mostly based on the Euler-Lagrange transformation, the authors use the finite element method to solve the energy minimization equation. The advantages of this approach over the Euler-Lagrange transformation approach are that the method is straightforward, leads to positive m-diagonal symmetric matrices, and has the ability to cope with irregular geometries such as junctions and corners. The energy functional integral solved using this method can also be used to segment the features by searching for the location of the maxima of the first derivative of the energy over the elementary curve set.

Dielectrophoresis of micro/nano particles using curved microelectrodes

Dielectrophoresis, the induced motion of polarisable particles in non-homogenous electric field, has been proven as a versatile mechanism to transport, immobilise, sort and characterise micro/nano scale particle in microfluidic platforms. The performance of dielectrophoretic (DEP) systems depend on two parameters: the configuration of microelectrodes designed to produce the DEP force and the operating strategies devised to employ this force in such processes. This work summarises the unique features of curved microelectrodes for the DEP manipulation of target particles in microfluidic systems. The curved microelectrodes demonstrate exceptional capabilities including (i) creating strong electric fields over a large portion of their structure, (ii) minimising electro-thermal vortices and undesired disturbances at their tips, (iii) covering the entire width of the microchannel influencing all passing particles, and (iv) providing a large trapping area at their entrance region, as evidenced by extensive numerical and experimental analyses. These microelectrodes have been successfully applied for a variety of engineering and biomedical applications including (i) sorting and trapping model polystyrene particles based on their dimensions, (ii) patterning carbon nanotubes to trap low-conductive particles, (iii) sorting live and dead cells based on their dielectric properties, (iv) real-time analysis of drug-induced cell death, and (v) interfacing tumour cells with environmental scanning electron microscopy to study their morphological properties. The DEP systems based on curved microelectrodes have a great potential to be integrated with the future lab-on-a-chip systems.

Automated methods for the location of the boundaries of chromatographic peaks

Several simple techniques are presented for the identification of the boundaries of chromatographic peaks. These methods provide a significant reduction in the time needed to perform the rapid, automatic calculation of the central peak moments and to evaluate the quality of a separation while improving the accuracy of the measurements of column efficiencies. It was found that the identification of the peak boundaries as functions of the peak widths and the examination of the slope of the signal to noise versus time plot are viable alternatives to a manual determination.

Breaking Boundaries : recasting the “local” newspaper as “geo-social” news in a digital landscape

This paper reconceptualises the role of the small “local” newspaper in a new media environment and argues that definitions and concepts currently used to describe and define such publications are becoming increasingly problematic as newspapers shift into both print and online formats. The paper highlights the continued importance of geography for such newspapers at a time when there is wide academic debate on the relevance of territory and boundaries and the impact of time–space compression in a new media world. It argues, however, that a focus on a newspaper’s geographic connection must also acknowledge the increasing boundlessness and openness of the social space in which a newspaper operates. Ultimately this paper suggests the concept of “geo-social” news may be a more appropriate framework for scholars to consider such publications. I draw on the work of geography scholars, and discussions around “space” and “place” to construct the notion of “geo-social” news, highlighting some exemplars of small commercial newsroom practices in Australia, the United Kingdom and Canada and discussions with newspaper editors in Australia to demonstrate the relevance of the “geo-social” concept.

Negotiating gender boundaries : tensions in developing a professional identity as a female physical educator in boys' schools

Historically, gendered boundaries and their impacts on education have been widely contested. The global gender policy debate over the last sixty years has significantly vacillated between prioritising issues of educational and social practice that appear to privilege one gender over another (Lingard, Martino & Mills, 2009). The very nature of the title ‘Boys’ school’ conveys a hard gendered boundarying. In a socio-political climate where boys’ supposed underachievement has been attributed to the presumed “feminisation of teaching” (Hoff Sommers, 2000) it is not surprising that the rhetoric around the purpose and intent of boys’ education privileges masculinist discourses and practices. Physical Education (PE) and sport is often implicated as prominent curriculum spaces where the tensions produced through gendered discourse-power relations are played out, often at the expense of marginalised others.

Exploring the conceptual boundaries of diaspora and battlefield tourism: Australians' travel to the Gallipoli battlefield, Turkey, as a case study

Historical tourism resources associated with diasporic communities and battlefields would at face value appear to have little in common. On closer inspection, however, diaspora and battlefield tourism share several elements in common. These commonalities are explored in greater detail, with an eye to investigating battlefield tourism sites indelibly linked to the birth of modern nations, where it is argued that there is a particularly blurred boundary between these two forms of tourism that must be recognized. 

The Gallipoli battlefield, Turkey, provides the contextual anchor for this discussion in suggesting that a key reason Australians travel to this foreign place to is to find out what it means to be an Australian. The prominence of this battlefield in the psyche of Australians is borne out of the involvement of the Australian and New Zealand Army Corps (Anzac) in the First World War campaign that commenced at what is now known as Anzac Cove at Gallipoli on April 25, 1915. This campaign was the first united action of the fledging Australian nation bought together through federation in 1901.

Qualitative data collected from Australians visiting the Gallipoli battlefields in Turkey during 2010 is used to explore whether the experiences of those traveling to battlefields strongly associated with nation building legends and stories resemble those of diasporic tourists in seeking to return to their homeland. Emerging from the analysis, the confines of the blurred boundary between diaspora tourism and battlefield tourism is discussed in detail and an associated research agenda is proposed that aims to further clarify the scope of these concepts in relation to the broad spectrum of heritage tourism resources.

Disability and critical sociology: expanding the boundaries of critical social inquiry

Disability in the 21st century constitutes a legitimate and growing area of study in the academy. Interdisciplinary by nature, the origins of disability studies can be traced directly to social movements of disabled people organizing to define disability as a social rather than a medical problem. In the US, disabled sociologists such as Irv Zola, a leader in the American Sociology Association, were key figures in the field’s formative years. In Britain, sociologists such as Mike Oliver (1990) and Colin Barnes, both founding members of the British Council of Organisations of Disabled People (BCODP) used the social model to bridge the divide between disability studies and sociology (Barnes et al., 1999). Disability studies is now a growth area in the social sciences, the humanities and a host of other disciplines operating across the North/South divide.